JPH07332820A - Ice making machine - Google Patents

Abstract

PURPOSE:To provide an ice making machine which can rapidly release manufactured ice while avoiding the occurrence of supercooling. CONSTITUTION:A fan 22 is provided to cool a condenser 42 of an ice machine I and an ET sensor 26 is provided to detect the temperature of a cooler 1. In the process of manufacturing ice, when the temperature of the cooler 1 is dropped to a prescribed value based on the output from the ET sensor 26, the ice is transferred to an ice releasing process after stopping the fan 22 for a predetermined time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic ice making machine such as a so-called reverse cell type ice making machine or a plate type ice making machine.

[0002]

2. Description of the Related Art Conventionally, this type of ice making machine, particularly an inverse cell type ice making machine, has a large number of downwardly opening ice making machines as shown in, for example, Japanese Utility Model Laid-Open No. 4-52622 (F25C1 / 04). A water tray that can be tilted back and forth is provided below the ice making chamber that divides the small chamber.When the water tray closes the ice making small chamber, the high-temperature high-pressure refrigerant discharged from the compressor is condensed by the condenser. After decompressing with the decompression device, the ice-making water is allowed to flow into the evaporator provided on the outer upper surface of the ice-making chamber to cool the ice-making small chamber, and the ice-making water stored in the ice-making water tank is cooled from the surface of each water tray. While the ice making process is performed by spraying water into the small chamber, the high temperature and high pressure refrigerant from the compressor is directly flown into the evaporator to heat the ice making process while the water tray is opened.

In this case, the condenser is provided with an air-cooling fan, which is operated during the ice making process to accelerate the condensation of the refrigerant and stopped during the ice removing process.

[0004]

Conventionally, the above-mentioned condenser cooling fan has been turned on and off based on the temperature of the condenser in the entire range of the ice making process. Therefore, especially when the ice making process is completed on the verge of turning off the ice making process, At low outside air temperature, the temperature of the condenser becomes too low, so that the temperature and pressure of the refrigerant discharged from the compressor decrease, and it takes a long time for the subsequent deicing process.

If the ice removing process takes a long time, there is a problem that the ice making capacity (ice making efficiency) of the ice making machine is lowered and the ice produced is deformed. Therefore, for example, in Japanese Utility Model Laid-Open No. 62-83160 (F25C5 / 10), when the pressure or temperature of the high-pressure gas refrigerant is low, the fan for cooling the condenser is stopped and the deicing stroke is continued until the temperature rises to a predetermined value. However, this configuration has a problem in that the ice making process becomes too long this time, resulting in overcooling and imposing an excessive load on the equipment.

The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide an ice making machine capable of quickly removing ice while avoiding the occurrence of supercooling. And

[0007]

That is, an ice-making machine according to a first aspect of the present invention is provided with a cooling device including a compressor, a condenser, a decompression device and a cooler, and a high temperature refrigerant discharged from the compressor is condensed into the condenser. Condensed at and flowed into the cooler via the pressure reducing device,
In addition, the ice making water is circulated in the cooler to perform the ice making process, and the high temperature refrigerant discharged from the compressor is allowed to flow into the cooler to perform the ice removing process, and the condenser cools the condenser. The cooling means, a cooler temperature detection means for detecting the temperature of the cooler, and a control means for controlling the operation of the condenser cooling means, the control means, in the ice making process,
Based on the output of the cooler temperature detection means, when the temperature of the cooler falls to a predetermined temperature, the condenser cooling means is stopped for a predetermined period, and then the ice removal process is started.

An ice making machine according to a second aspect of the present invention is equipped with a cooling device including a compressor, a condenser, a pressure reducing device and a cooler, and the high temperature refrigerant discharged from the compressor is condensed by the condenser to reduce the pressure. Flow into the cooler through the device, and the ice making water in the reservoir is circulated in the cooler to perform the ice making process, and the high temperature refrigerant discharged from the compressor is made to flow into the cooler to perform the ice removing process. What is to be done, comprising a condenser cooling means for cooling the condenser, a water level detecting means for detecting the water level of the ice making water in the reservoir, and a control means for controlling the operation of the condenser cooling means, In the ice making process, this control means stops the condenser cooling means for a predetermined period and then shifts to the ice removing process when the water level in the storage unit has decreased to a predetermined value based on the output of the water level detecting means. .

An ice making machine according to a third aspect of the present invention is equipped with a cooling device including a compressor, a condenser, a decompression device and a cooler, and condenses the high temperature refrigerant discharged from the compressor in the condenser to reduce the pressure. The ice making process is carried out by flowing the ice making water into the cooler through the device and circulating the ice making water to the cooler, and the high temperature refrigerant discharged from the compressor is made to flow into the cooler to perform the ice removing process. The cooling means includes a condenser cooling means for cooling the condenser, a cooler pressure detecting means for detecting the pressure in the cooler, and a control means for controlling the operation of the condenser cooling means. In the ice making process, when the pressure in the cooler is reduced to a predetermined value based on the output of the cooler pressure detecting means, the condenser cooling means is stopped for a predetermined period and then the ice removing process is started. .

An ice making machine according to a fourth aspect of the present invention is provided with a cooling device including a compressor, a condenser, a pressure reducing device and a cooler, and the high temperature refrigerant discharged from the compressor is condensed by the condenser to reduce the pressure. Flow into the cooler through the device and the ice making water is circulated in the cooler by the circulation pump to perform the ice making process, and the high temperature refrigerant discharged from the compressor is made to flow into the cooler to perform the ice removing process. A cooling means for cooling the condenser, a discharge water pressure detecting means for detecting the pressure in the circulation path of the ice making water discharged from the circulation pump to the cooler, and an operation of the condenser cooling means. And a control means for controlling, which control means, in the ice making process,
Based on the output of the discharge water pressure detection means, when the pressure rises to a predetermined value, the condenser cooling means is stopped for a predetermined period, and then the ice removal process is started.

[0011]

According to the ice making machine of the first aspect of the present invention, when the temperature of the cooler drops to a predetermined temperature in the ice making process, the condenser cooling means is stopped for a predetermined period and then the ice making process is started. Therefore, by setting the predetermined temperature of the cooler as the temperature before the predetermined period when the ice making process ends,
In particular, it is possible to increase the temperature or pressure of the refrigerant discharged from the compressor at the time of entering the deicing stroke, such as when the outside temperature is low. Therefore, it is possible to quickly end the subsequent ice removing process to improve the ice making capacity and prevent deformation of the ice. Also, since the ice making process will not be extended,
The occurrence of supercooling is also eliminated, and the inconvenience of damage to the equipment due to the excessive load caused thereby is avoided.

According to the ice making machine of the second aspect of the present invention, when the water level in the storage portion drops to a predetermined value in the ice making process, the condenser cooling means is stopped for a predetermined period and then the ice making process is started. Therefore, by setting the predetermined water level in the storage unit as the water level before the predetermined period when the ice making process ends, in particular, the discharge refrigerant temperature of the compressor at the time of entering the ice removing process at a low outside temperature or the like, or The pressure can be increased. Therefore, it is possible to quickly end the subsequent ice removing process to improve the ice making capacity and prevent deformation of the ice. Further, since the ice making process is not extended, the occurrence of supercooling is eliminated, and the inconvenience of causing damage to the equipment due to an excessive load due to it is avoided.

According to the ice making machine of the third aspect of the invention, when the pressure in the cooler drops to a predetermined value in the ice making process, the condenser cooling means is stopped for a predetermined period and then the ice making process is started. Therefore, by setting the predetermined pressure in the cooler as the pressure before the predetermined period when the ice making process ends, in particular, the refrigerant discharged from the compressor at the time of entering the ice removing process at a low outside temperature or the like. The temperature or pressure can be increased. Therefore, it is possible to quickly end the subsequent ice removing process to improve the ice making capacity and prevent deformation of the ice. Further, since the ice making process is not extended, the occurrence of supercooling is eliminated, and the inconvenience of causing damage to the equipment due to an excessive load due to it is avoided.

According to the ice making machine of the fourth aspect of the present invention, the condenser cooling means is provided when the pressure in the circulation path of the ice making water discharged from the circulation pump to the cooler rises to a predetermined value in the ice making process. After stopping for a predetermined period of time, the process is shifted to the ice-freezing process.Therefore, by setting the predetermined pressure as a pressure before the predetermined period of time when the ice-making process ends, the ice-freezing process can be performed especially when the outside temperature is low. The temperature or pressure of the refrigerant discharged from the compressor at the time of entering can be increased. Therefore, it is possible to quickly end the subsequent ice removing process to improve the ice making capacity and prevent deformation of the ice. Further, since the ice making process is not extended, the occurrence of supercooling is eliminated, and the inconvenience of causing damage to the equipment due to an excessive load due to it is avoided.

[0015]

An embodiment of the present invention will be described in detail with reference to the drawings. 1 is an electric circuit diagram of a control device 20 of the ice making machine I of the present invention, FIG. 2 is a side view of an ice making part of the ice making machine I in a state where the water tray 5 is in a horizontal closed position, and FIG. FIG. 4 is a side view of the ice making section of the ice making machine I in the inclined open position, and FIG. 4 is a refrigerant circuit diagram of the cooling device R of the ice making machine I.

2 and 3, the ice making machine I of the embodiment is shown.
Is a so-called reverse cell type ice making machine, which has a large number of downwardly opening ice making chambers 1A therein, and a cooler 1 provided with an evaporation pipe 2 of a cooling device R on an outer surface of an upper wall thereof, Figure 2
At a predetermined horizontal closing position such as shown above, each ice making chamber 1A is closed from below with a sufficient margin, and a water tray 5 having a fountain hole and a return hole (not shown) corresponding to each ice making chamber 1A is formed on the surface.
A water tank 6 fixed to the water tray 5 and communicating with the return hole, and a water pipe 6 for supplying water in the water tank 6;
Further, a drive including a circulation pump 9 that squirts from the fountain hole through a distribution pipe (not shown) and circulates it to each ice making chamber 1A, and a deceleration motor 10 with a high gear ratio that can rotate forward and backward to tilt and return the water tray 5 The device 11, the sprinkler 13 that sprinkles water on the surface of the water tray 5 when the water supply solenoid valve 12 in FIG. 4 is opened, and the float provided in the water tank 6 operate to detect a predetermined water level in the water tank 6. Water level switch W as a means
It is composed of LSW and the like.

Then, the mounting plate 1 fixed to the support beam 15
An output shaft of the reduction motor 10 supported by the first and second arms 17 </ b> A and 1 </ b> A extending in mutually opposite directions.
7B is connected to the drive cam 17, and the coil spring 18 is attached to the end of the first arm 17A of the drive cam 17.
The other end of the water tray 5 is connected to the side portion of the water tray 5, and the rear portion of the water tray 5 is supported by the rotating shaft 19.

The ASW is a contact-type water tray position detection switch for detecting the horizontal closed position and the tilted open position of the water tray 5 by opening and closing the contacts. The water tray position detection switch ASW is in a positional relationship in which the first and second arms 17A and 17B of the drive cam 17 come into contact with each other, and when the drive cam 17 rotates counterclockwise in FIG. When the water tray 5 is in the tilt open position, the second arm 17B abuts on the water tray position detection switch ASW as shown in FIG. 3, whereby the contact of the water tray position detection switch ASW is closed and the return side. Is switched and inverted.

When the drive cam 17 rotates clockwise in the drawing due to the reverse rotation of the deceleration motor 10, the first arm 17A detects the water tray position when the water tray 5 reaches the horizontal closed position as shown in FIG. The switch contacts the switch ASW, whereby the contact of the water dish position detection switch ASW is opened and switched and inverted to the tilting side.

The above are the components provided on the ice making section side of the ice making machine I. On the machine room side of the ice making machine I, the compressor 21, the auxiliary condenser 41 and the condenser of the cooling device R as shown in FIG. A container 42 and the like are provided. Next, the refrigerant circulation in the cooling device R will be described with reference to the refrigerant circuit diagram of FIG.
The high-temperature and high-pressure gas refrigerant discharged from 1 is the auxiliary condenser 4
After flowing into 1 and radiating heat, it returns to the compressor 21 once, and is discharged again to reach the three-way pipe 43. The refrigerant discharged from one outlet of the three-way pipe 43 is air-cooled and condensed in the condenser 42, passes through the liquid receiver 44 and the dryer 45, and then the expansion valve 4 as a pressure reducing device.
Up to 6.

The refrigerant squeezed by the expansion valve 46 flows into the evaporation pipe 2, evaporates, and absorbs heat from the cooler 1 to cool it. And this evaporation pipe 2
The refrigerant that has exited is returned to the compressor 21 via the accumulator 47. In addition, the expansion valve 46 is connected from the other outlet of the three-way valve 43.
A hot gas pipe 48 in which a hot gas solenoid valve 23 is provided is connected to the outlet side of the hot gas solenoid valve 23, and a high temperature and high pressure gas refrigerant (hot gas) discharged from the compressor 21 with the hot gas solenoid valve 23 open. ) Is directly supplied to the evaporation pipe 2.

Next, in the control device 20 of FIG. 1, the following circuits are connected to the power source AC via the operation switch 35. That is, the compressor 21 constituting the cooling device R is connected in series with the relay R1, and the condenser cooling fan 22 as a condenser cooling means for cooling the condenser 42 of the cooling device R is connected in series with the relay R2. Has been done.

The circulation pump 9 is connected in series with a relay R3, the hot gas solenoid valve 23 is connected in series with a relay R7, and the water supply solenoid valve 12 is connected in a relay R4.
And are connected in series. Further, the reduction motor 10 is connected in series with the relay R5 and the switching relay R6. The switching relay R6 is closed to the contact a side to rotate the deceleration motor 10 in the forward direction and switched to the contact b side to rotate the deceleration motor 10 in the reverse direction.

These relays R1 to R7 are controlled by a general-purpose microcomputer 25 as a control means. The water level switch WLSW and the water tray position detection switch ASW are connected to the input of the microcomputer 25, and the ice storage switch BSW that closes the contacts when a predetermined full ice amount in the ice storage (not shown) is detected is connected. .

Further, an input of the microcomputer 25 is an ET sensor 26 as a cooler temperature detecting means for detecting the temperature of the cooler 1, and a cooler pressure detecting means for detecting a refrigerant pressure in the cooler 1. EP sensor 51,
In the CT sensor 31 as a condenser temperature detecting means for detecting the outlet temperature of the condenser 42 (the temperature of the condenser 42), and in the circulation path of the ice making water from the circulation pump 9 to the fountain hole of the water tray 5. Of the discharge water pressure detecting means for detecting the pressure of the discharge water (the discharge pressure of the circulation pump 9 in the embodiment).
A sensor 52 is connected, and further, a forced water supply switch 53 for forcibly supplying water by the water supply solenoid valve 12, a forced ice removal switch 55 for forcibly performing ice removal, and switching of the display of a display 29 described later, The feed switches 54 for fast-forwarding the time are respectively connected. The forced water supply switch 53, the forced ice removal switch 55, and the feed switch 54 are arranged side by side on the substrate in this order.

A monitor 27 and a display unit 29 are connected to the output of the microcomputer 25, and the display unit 29 is composed of a 7-segment 2-digit LED.
Further, the microcomputer 25 has, for example, EEPRO.
A memory 30 composed of M is connected, and the memory 30 retains the stored contents without loss even when the power supply to the ice making machine I is cut off, and the stored contents can be erased by a clear operation (not shown).

Next, a flow chart showing a program of the microcomputer 25 shown in FIGS. 5, 6 and 10.
The operation of the ice making machine I will be described based on the operation process charts of the ice making machine I shown in FIGS. 7 to 9. After installing the ice maker I, or because it has not been used for a long time, or due to an instantaneous power failure, the power supply AC
After the power is cut off, the operation switch 35 is closed again and the ice making machine I
It is assumed that the power is turned on (ON). At this time water tray 5
The position of is not fixed, the horizontal blocking position (Fig. 2)
Or, it is in an inclined open position (FIG. 3) or an inclined state in the middle thereof, and the inclined state may be in the middle of tilting or in the middle of returning.

However, such a state can be discriminated into two types depending on the open / closed state of the contact of the water tray position detection switch ASW. That is, when the contact of the water tray position detection switch ASW is open and is on the tilt side, the water tray 5 is in the horizontal closed position or in the middle of tilting, and the contact of the water tray position detection switch ASW is closed and is on the return side. At one time, the water tray 5 is in the inclined open position or in the middle of returning.

Therefore, when the operation switch 35 is closed and the power supply AC is turned on (ON), the microcomputer 25 determines the state of the water tray position detection switch ASW in step S1 and the contact is open to the tilting side. If there is (Fig. 7
Situation. The water tray 5 is in the horizontal closed position or in the middle of tilting),
In step S2, the relay R5 is closed and the switching relay R
6 is closed to the contact a side, the deceleration motor 10 is normally rotated, and the water tray 5 is tilted. Then, in step S4, the state of the water tray position detection switch ASW is discriminated again, and if it is still on the tilt side, the process returns to step S2 to continue tilting. The water tray 5 comes to the predetermined tilt open position, and the water tray position detection switch AS
When the contact point of W is closed and reversed to the return side, the microcomputer 25 proceeds from step S4 to step S5 and this time closes the switching relay R6 to the contact point b side, and the deceleration motor 10
Reverse and start the return movement of the water tray 5.

Next, in step S6, the microcomputer 25 determines whether or not it is 15 seconds before the water tray 5 is completely closed (horizontal closed position). If not, the process proceeds to step S9 and the water tray position detection switch is restarted. The state of the ASW is judged, and if it is still on the backward movement side, the procedure returns to step S5 to continue the backward movement. Then, 15 seconds before, the process proceeds from step S6 to step S7, the relay R4 is closed and the water supply solenoid valve 12 is opened (ON). When the water supply solenoid valve 12 is opened, water is sprayed from the sprinkler 13 onto the surface of the water tray 5, and mainly through the return hole to the water tank 6.
Will be supplied with water.

Next, in step S8, the water level switch WLS
Based on W, it is determined whether or not the water level in the water tank 6 has reached a predetermined full water level, and if not, the process proceeds to step S9. After that, when the water tray 5 is in the horizontal closed position (FIG. 2) and the contact of the water tray position detection switch ASW is opened and inverted to the tilting side, the microcomputer 25 returns from step S9 to step S6. The return movement of the water tray 5 is stopped.

On the other hand, when the contact of the water tray position detection switch ASW is closed and is on the backward movement side when the power supply AC is turned on (the situation of FIG. 7. The water tray 5 is in the inclined open position or the backward movement position). During the movement), the microcomputer 25 proceeds from step S1 to step S3 to close the relay R5, close the switching relay R6 to the contact b side, reverse the deceleration motor 10, and move the water tray 5 back. After that, the process proceeds to step S6, and thereafter, the return movement is continued until the water dish position detection switch ASW is reversed to the tilt side in step S9 as described above, and the water dish 5 is similarly stopped at the horizontal closed position.

Thus, the microcomputer 25 determines the state of the water tray 5 according to the open / close state of the contact of the water tray position detection switch ASW when the power is turned on (ON),
If it is judged that the horizontal closing position or the tilting is in progress, the water tray 5
Is temporarily tilted and then returned to a predetermined horizontal closing position, and when it is judged that the water tray 5 is in the tilt open position or in the middle of returning, the water tray 5 is moved back to the horizontal closing position. Position. In any case, according to the ice making machine I of the present invention, after the power is turned on, the water tray 5 is always initialized to the horizontal closed position.

After that, when the water level switch WLSW detects the full water level in the water tank 6, the routine proceeds from step S8 to step S10 in FIG.
Stop 2 (OFF). Next, the microcomputer 25 proceeds to step S12 and relays R3 and R3.
7 is closed, the circulation pump 9 is operated (ON), and the hot gas solenoid valve 23 is opened (ON).

When the circulation pump 9 is operated, the water in the water tank 6 is sprayed from the fountain hole to the ice making chamber 1A through the discharge side path from the discharge side of the circulation pump 9 to the fountain hole,
The water is circulated through the return path from the return hole to the water tank 6. As a result, dust or water stains accumulated or attached in the circulation path are washed, and dust clogged in the fountain hole is also removed.

Next, the microcomputer 25 determines in step S13 whether or not the count of the timer having the function is 30 seconds, and if not, the process returns to step S12 to continue the cleaning in the circulation path. . After such cleaning is performed for 30 seconds, the microcomputer 25
Goes from step S13 to step S14 and relay R
1 is closed, the compressor 21 is started, and the following ice removing process is performed.

In this ice removal process, the microcomputer 2
Numeral 5 opens the relays R2 and R3, stops the condenser cooling fan 22 and the circulation pump 9, closes the relays R5 and R7, closes the switching relay R6 to the contact a side, and causes the deceleration motor 10 to rotate normally. , Tilt the water tray 5. Further, since the hot gas solenoid valve 23 is opened, the high-temperature high-pressure gas refrigerant (hot gas) discharged from the compressor 21 is circulated through the evaporation pipe 2 to heat the cooler 1.

When the water tray 5 is tilted to a predetermined tilt open position (fully opened) as shown in FIG. 3, the second arm 17B of the drive cam 17 contacts the water tray position detection switch ASW and moves to the return side. Since it is inverted, the microcomputer 2
5 opens the relay R5 to stop the deceleration motor 10 and stop the tilting of the water tray 5. When the water tray 5 is at the inclined open position, the circulating water in the water tank 6 is drained to a drainage section (not shown) located immediately below the water tank 6. The temperature of the cooler 1 taken in by the ET sensor 26 is, for example, +9.
It is judged whether the temperature is higher than the completion temperature of ice removal such as ℃, and if it is higher, the relay R5 is closed and the switching relay R
6 to the contact b to rotate the deceleration motor 10 in the reverse direction,
To move upwards.

When the water tray 5 returns to a predetermined horizontal closed position (fully closed) as shown in FIG. 2 by such a returning movement, the drive cam 1
1st arm 17A of 7 is a water tray position detection switch ASW
The microcomputer 25 opens the relays R5 and R7, closes the hot gas solenoid valve 23, and stops the deceleration motor 10 to stop the return movement of the water tray 5. Then, the microcomputer 25 proceeds to step S15 to close the relay R1 and operate the compressor 21 to shift to the following ice making process. It should be noted that the microcomputer 25 closes the relay R4 15 seconds before the water tray 5 is completely closed to close the water supply solenoid valve 1.
2 is opened, and water supply to the water tank 6 is started as described above.

FIG. 10 shows the operation of the microcomputer 25 during the ice making process. In the example, 1 minute and 30 seconds after the temperature of the cooler 1 dropped to, for example, −18 ° C., the temperature of the cooler 1 dropped to approximately −20 ° C., and this temperature (−
The ice-making is completed at 20 ° C.

In the ice making process, the refrigerant discharged from the compressor 21 is condensed and liquefied by the auxiliary condenser 41 and the condenser 42 as described above, is squeezed by the expansion valve 46, and then is supplied to the evaporation pipe 2, where it is supplied. Evaporate to cool the cooler 1. Also,
The microcomputer 25 includes a relay R2 and a relay R.
4, the condenser cooling fan 22 is operated while supplying water, and the relay R3 is closed and the circulation pump 9 is operated to circulate the water in the water tank 6 from the fountain holes to the respective ice making chambers 1A.

Thereafter, the microcomputer 25 supplies a predetermined amount of water to the water tank 6 based on the water level switch WLSW. When the water level switch WLSW detects a predetermined full water level, the relay R4 is opened and the water supply solenoid valve 12 is closed. Stop water supply. The microcomputer 25 is shown in FIG.
In step S21 of 0, the temperature of the cooler 1 is taken in based on the output of the ET sensor 26, and in step S22, it is determined whether or not the temperature of the cooler 1 has dropped to -18 ° C. And it waits until the temperature of the cooler 1 falls to this -18 degreeC, and if it falls, the microcomputer 25 will progress to step S23.

In step S23, the microcomputer 25 takes in the temperature of the condenser 42 based on the output of the CT sensor 31 and judges whether the temperature of the condenser 42 is + 20 ° C. or lower. When the result in step S23 is NO, the microcomputer 25 proceeds to step S24, and this time determines whether or not the temperature of the condenser 42 is + 35 ° C. or lower. If it is also negative here, the microcomputer 25 proceeds from step S24 to step S25 to determine whether the temperature of the condenser 42 is + 45 ° C. or lower.
It is judged whether the integrated value of the 1 minute 30 second timer which 5 has as a function has passed 1 minute 30 seconds after the step S22, and if not 1 waits for 1 minute 30 seconds.

When 1 minute and 30 seconds have passed, that is, when the temperature of the cooler 1 reaches the above-mentioned -20 ° C. at which the ice making is completed, the microcomputer 25 proceeds to step S16 of FIG. Also, the relay R3 is opened, and the condenser cooling fan 22 and the circulation pump 9 are stopped. Next, the relays R5 and R7 are closed, the switching relay R6 is closed to the contact a side, the deceleration motor 10 is normally rotated, the tilting of the water tray 5 is started, and the hot gas solenoid valve 23 is opened to evaporate. The high-temperature high-pressure gas refrigerant (hot gas) is circulated in the pipe 2 to heat the cooler 1 to cool the ice-making chamber 1
The ice-freezing process in A is started.

This ice removing process is executed in the same manner as described above. Then, during this ice removal process, the microcomputer 25 determines whether or not the ice storage switch BSW is closed. If a predetermined amount of ice is stored in the ice storage (not shown), the microcomputer 25 proceeds to step S17 and relays R1 and relays. R7 is opened, the operation of the compressor 21 is stopped, and the ice storage process is started. After that, the ice in the ice storage decreases and the ice storage switch BSW
Is maintained until it is closed, and when the ice storage switch BSW is closed, the ice making process is executed again.

On the other hand, when the outside air temperature is low, such as in winter, and the temperature of the condenser 42 has dropped to + 20 ° C. or lower at the time of step S23, the microcomputer 25 advances from step S23 to step S26 and relays. The fan 22 for cooling the condenser is stopped by opening R2. And
In step S27, it is determined whether or not the integrated value of the 1 minute 30 second timer that the microcomputer 25 also has as its function has passed 1 minute 30 seconds after step S22.
If not, wait for 1 minute 30 seconds and then step S1
Proceed to No. 6 ice clearance process.

That is, when the temperature of the condenser 42 is below + 20 ° C. at the time when the temperature of the cooler 1 is lowered to −18 ° C., which is 1 minute and 30 seconds before -20 ° C. when the ice making is completed, After that, the microcomputer 25 stops the condenser cooling fan 22 for 1 minute and 30 seconds until the ice making is completed, and then shifts to the ice removing process.

When the temperature of the condenser 42 is higher than + 20 ° C. but not higher than + 35 ° C., the microcomputer 25 advances from step S24 to step S28, and the microcomputer 25 also has a 30-second timer which has its function. It is determined whether or not the integrated value has passed 30 seconds after step S22, and if not, wait for 30 seconds. After 30 seconds, the microcomputer 2
In step S29, the relay R2 is opened and the condenser cooling fan 22 is stopped as described above.

Next, in step S30, it is determined whether or not the integrated value of the one-minute timer, which the microcomputer 25 also has as its function, has passed one minute after step S28. Wait for step S1
Proceed to No. 6 ice clearance process. That is, the temperature of the condenser 42 is higher than + 20 ° C. and + 35 ° C. when the temperature of the cooler 1 is reduced to −18 ° C., which is 1 minute and 30 seconds before -20 ° C. when the ice making is completed.
If the temperature is below ℃, the microcomputer 25
After the lapse of 0 seconds, the condenser cooling fan 22 is stopped for 1 minute until the ice making is completed, and then the ice removing process is started.

Further, when the temperature of the condenser 42 is higher than + 35 ° C. but lower than + 45 ° C., the microcomputer 25 advances from step S25 to step S31, and the microcomputer 25 also has a one-minute timer functioning as a function thereof. It is determined whether or not the integrated value has passed 1 minute after step S22, and if not 1 minute is waited. After one minute, the microcomputer 25 proceeds to step S32 to open the relay R2 and stop the condenser cooling fan 22 as described above. Next, step S3
In step 3, it is judged whether the integrated value of the 30-second timer which the microcomputer 25 also has as its function has passed 30 seconds, and if not, wait 30 seconds and then step S
Proceed to 16 ice removal steps.

That is, when the temperature of the cooler 1 drops to -18 ° C, 1 minute and 30 seconds before -20 ° C when the ice making is completed, the temperature of the condenser 42 becomes higher than + 35 ° C and becomes + 45 ° C or less. If the microcomputer 25 is
After the lapse of minutes, the condenser cooling fan 22 is stopped for 30 seconds until the ice making is completed, and then the ice removing process is started.

Next, FIG. 11 shows the operation of the microcomputer 25 during the ice making process of another ice making machine I of the present invention. In the embodiment in this case, it is assumed that the ice making is completed 1 minute 30 seconds after the water level in the water tank 6 drops to a predetermined low water level. Also in this case, during the ice making process, the refrigerant discharged from the compressor 21 is condensed and liquefied by the auxiliary condenser 41 and the condenser 42 as described above, narrowed by the expansion valve 46, and then supplied to the evaporation pipe 2. Where it is evaporated to cool the cooler 1. In addition, the microcomputer 2
5 operates the fan 22 for cooling the condenser while closing the relays R2 and R4 to supply water, and also closes the relay R3 and operates the circulation pump 9 so that the water in the water tank 6 is discharged from the fountain holes. Circulate in the ice making chamber 1A.

After that, the microcomputer 25 supplies a predetermined amount of water to the water tank 6 based on the water level switch WLSW. When the water level switch WLSW detects a predetermined full water level, the relay R4 is opened and the water supply solenoid valve 12 is closed. Stop water supply. The microcomputer 25 is shown in FIG.
In step S41 of No. 1, the water level in the water tank 6 is also taken in based on the water level switch WLSW, and step S4
In step 2, it is determined whether or not the water level has dropped to the predetermined low water level. On the other hand, since ice grows in the ice making chamber 1A, the water level in the water tank 6 gradually decreases. And the water tank 6
It waits until the water level inside falls to the predetermined low water level, and when it falls, the microcomputer 25 proceeds to step S43.

In step S43, the microcomputer 25 takes in the temperature of the condenser 42 based on the output of the CT sensor 31 and judges whether the temperature of the condenser 42 is + 20 ° C. or lower. When the result in step S43 is NO, the microcomputer 25 proceeds to step S44, and this time determines whether or not the temperature of the condenser 42 is + 35 ° C. or lower. If the result is no, the microcomputer 25 proceeds from step S44 to step S45 to determine whether the temperature of the condenser 42 is + 45 ° C. or lower. If the result is no, the microcomputer 25 proceeds to step S44.
It is determined whether or not the integrated value of the 1 minute 30 second timer which 5 has as its function has passed 1 minute 30 seconds after the step S42, and if not 1 waits 1 minute 30 seconds.

When 1 minute and 30 seconds have passed, that is, when ice making is completed, the microcomputer 25
Proceeding to step S16 of FIG. 6, the relay R2 and the relay R
3, the fan 22 and the circulation pump 9 for cooling the condenser are opened.
To stop. Next, the relays R5 and R7 are closed, the switching relay R6 is closed to the contact a side, the deceleration motor 10 is normally rotated, the tilting of the water tray 5 is started, and the hot gas solenoid valve 23 is opened to evaporate. The high-temperature high-pressure gas refrigerant (hot gas) is circulated in the pipe 2 to heat the cooler 1 and the ice-making chamber 1A shifts to the ice-freezing step. After this ice-breaking process, the process is performed as described above.

On the other hand, when the outside air temperature is low, such as in winter, and the temperature of the condenser 42 has dropped to + 20 ° C. or lower at the time of step S43, the microcomputer 25 proceeds from step S43 to step S46 and relays. The fan 22 for cooling the condenser is stopped by opening R2. And
In step S47, it is determined whether or not the integrated value of the 1 minute 30 second timer that the microcomputer 25 also has as its function has passed 1 minute 30 seconds after step S42.
If not, wait for 1 minute 30 seconds and then step S1
Proceed to No. 6 ice clearance process.

That is, when the water level in the water tank 6 drops to a predetermined low water level 1 minute 30 seconds before the completion of ice making, the condenser 4
When the temperature of 2 is + 20 ° C or lower, the microcomputer 25 waits for 1 minute 3 until the ice making is completed.
The fan 22 for cooling the condenser is stopped for 0 seconds, and then the ice removal process is started.

When the temperature of the condenser 42 is higher than + 20 ° C. but not higher than + 35 ° C., the microcomputer 25 advances from step S44 to step S48, and the microcomputer 25 also has a 30 second timer as a function thereof. It is judged whether or not the integrated value has passed 30 seconds after the step S42, and if not, wait for 30 seconds. After 30 seconds, the microcomputer 2
In step S49, the relay R2 is opened and the condenser cooling fan 22 is stopped in the same manner as described above.

Next, in step S50, it is judged whether or not the integrated value of the 1-minute timer, which the microcomputer 25 also has as its function, has passed 1 minute after step S48. Wait for step S1
Proceed to No. 6 ice clearance process. That is, if the temperature of the condenser 42 is higher than + 20 ° C. and + 35 ° C. or lower at the time when the water level in the water tank 6 drops to a predetermined low water level 1 minute 30 seconds before the completion of ice making, the microcomputer 25 After the lapse of 30 seconds, the fan 22 for cooling the condenser is stopped for 1 minute until the ice making is completed, and then the ice removing process is started.

Further, when the temperature of the condenser 42 is higher than + 35 ° C. but equal to or lower than + 45 ° C., the microcomputer 25 proceeds from step S45 to step S51, and the microcomputer 25 also has a 1-minute timer of its function. It is determined whether or not the integrated value has passed one minute after step S42, and if not, one minute is waited. After one minute, the microcomputer 25 proceeds to step S52 to open the relay R2 and stop the condenser cooling fan 22 as described above. Next, step S5
In step 3, it is judged whether the integrated value of the 30-second timer which the microcomputer 25 also has as its function has passed 30 seconds, and if not, wait 30 seconds and then step S
Proceed to 16 ice removal steps.

That is, when the temperature of the condenser 42 is higher than + 35 ° C. and lower than + 45 ° C. at the time when the water level in the water tank 6 drops to a predetermined low water level 1 minute 30 seconds before the completion of ice making, After the lapse of one minute, the microcomputer 25 stops the condenser cooling fan 22 for 30 seconds until the ice making is completed, and then shifts to the ice removing process.

Next, FIG. 12 shows the operation of the microcomputer 25 during the ice making process of another ice making machine I of the present invention. In the embodiment of this case, the pressure in the cooler 1 drops to, for example, 0.6 kg / square centimeter after 1 minute and 30 seconds from the time when the pressure in the cooler 1 drops to 0.8 kg / square centimeter. (0.6 kg / square centimeter) shall be the completion of ice making. Also in this case, the compressor 2 is used during the ice making process.
As described above, the refrigerant discharged from No. 1 is condensed and liquefied by the auxiliary condenser 41 and the condenser 42, is squeezed by the expansion valve 46, is supplied to the evaporation pipe 2, and is evaporated there to be cooled by the cooler 1.
To cool. Further, the microcomputer 25 operates the condenser cooling fan 22 while closing the relays R2 and R4 to supply water, and also closes the relay R3 to operate the circulation pump 9 to operate the water in the water tank 6. It circulates from the fountain hole to each ice making chamber 1A.

Thereafter, the microcomputer 25 supplies a predetermined amount of water to the water tank 6 based on the water level switch WLSW. When the water level switch WLSW detects a predetermined full water level, the relay R4 is opened and the water supply solenoid valve 12 is closed. Stop water supply. The microcomputer 25 is shown in FIG.
In step S61 of 2, the pressure in the cooler 1 is also taken in based on the EP sensor 51, and it is determined in step S62 whether the pressure has dropped to 0.8 kg / square centimeter. On the other hand, as described above, ice grows in the ice making chamber 1A, and the pressure in the cooler 1 gradually decreases accordingly. The pressure inside the cooler 1 is 0.8 kg /
Wait until the square centimeter is lowered, and if it is lowered, the microcomputer 25 proceeds to step S63.

In step S63, the microcomputer 25 takes in the temperature of the condenser 42 based on the output of the CT sensor 31 and judges whether the temperature of the condenser 42 is + 20 ° C. or lower. When the result in step S63 is NO, the microcomputer 25 proceeds to step S64, and this time determines whether or not the temperature of the condenser 42 is + 35 ° C or lower. If the result is no, the microcomputer 25 proceeds from step S64 to step S65 to determine whether the temperature of the condenser 42 is + 45 ° C. or lower. If the result is no, the microcomputer 25 proceeds to step S74.
It is judged whether or not the integrated value of the 1 minute 30 second timer which 5 has as its function has passed 1 minute 30 seconds after the step S62, and if not 1 waits for 1 minute 30 seconds.

When 1 minute and 30 seconds have passed, that is, when the ice making is completed, the microcomputer 25
Proceeding to step S16 of FIG. 6, the relay R2 and the relay R
3, the fan 22 and the circulation pump 9 for cooling the condenser are opened.
To stop. Next, the relays R5 and R7 are closed, the switching relay R6 is closed to the contact a side, the deceleration motor 10 is normally rotated, the tilting of the water tray 5 is started, and the hot gas solenoid valve 23 is opened to evaporate. The high-temperature high-pressure gas refrigerant (hot gas) is circulated in the pipe 2 to heat the cooler 1 and the ice-making chamber 1A shifts to the ice-freezing step. After this ice-breaking process, the process is performed as described above.

On the other hand, when the outside air temperature is low, such as in winter, and the temperature of the condenser 42 has dropped to + 20 ° C. or lower at the time of step S63, the microcomputer 25 proceeds from step S63 to step S66 and relays. The fan 22 for cooling the condenser is stopped by opening R2. And
In step S67, it is determined whether or not the integrated value of the 1 minute 30 second timer that the microcomputer 25 also has as its function has passed 1 minute 30 seconds after the step S62.
If not, wait for 1 minute 30 seconds and then step S1
Proceed to No. 6 ice clearance process.

That is, if the temperature of the condenser 42 is below + 20 ° C. at the time when the pressure in the cooler 1 is reduced to 0.8 kg / square centimeter 1 minute 30 seconds before the completion of ice making, the The computer 25 thereafter stops the condenser cooling fan 22 for 1 minute and 30 seconds until the ice making is completed, and then shifts to the ice removing process.

When the temperature of the condenser 42 is higher than + 20 ° C. but not higher than + 35 ° C., the microcomputer 25 proceeds from step S64 to step S68, and the microcomputer 25 also has a 30-second timer as a function thereof. It is judged whether or not the integrated value has passed 30 seconds after the step S62, and if not, wait for 30 seconds. After 30 seconds, the microcomputer 2
In step S69, the relay R2 is opened in the same manner as described above to stop the condenser cooling fan 22.

Next, in step S70, it is determined whether or not the integrated value of the 1-minute timer that the microcomputer 25 also has as its function has passed 1 minute after step S68. Wait for step S1
Proceed to No. 6 ice clearance process. That is, if the temperature in the condenser 42 is higher than + 20 ° C. and is + 35 ° C. or lower at the time when the pressure in the cooler 1 is reduced to 0.8 kg / square centimeter 1 minute and 30 seconds before the completion of ice making, a microcomputer is used. In 25, after the lapse of 30 seconds, the fan 22 for cooling the condenser is stopped for 1 minute until the ice making is completed, and then the ice removing process is started.

Further, when the temperature of the condenser 42 is higher than + 35 ° C. but not higher than + 45 ° C., the microcomputer 25 advances from step S65 to step S71, and the microcomputer 25 also has a one-minute timer of its function. It is determined whether or not the integrated value has passed 1 minute after step S62, and if not 1 minute is waited. After one minute, the microcomputer 25 proceeds to step S72 to open the relay R2 and stop the condenser cooling fan 22 as described above. Next, step S7
In step 3, it is judged whether the integrated value of the 30-second timer which the microcomputer 25 also has as its function has passed 30 seconds, and if not, wait 30 seconds and then step S
Proceed to 16 ice removal steps.

That is, 1 minute and 30 seconds before the completion of ice making, when the pressure in the cooler 1 drops to 0.8 kg / square centimeter, the temperature of the condenser 42 is higher than + 35 ° C. and +45.
If the temperature is below ℃, microcomputer 2
In No. 5, after 1 minute has passed, the condenser cooling fan 22 is stopped for 30 seconds until the ice making is completed, and then the ice removing process is started.

Next, FIG. 13 shows the operation of the microcomputer 25 during the ice making process of yet another ice making machine I of the present invention. In the embodiment in this case, the ice making is completed 1 minute 30 seconds after the discharge pressure of the circulation pump 9 rises to a predetermined high pressure. Also in this case, during the ice making process, the refrigerant discharged from the compressor 21 is condensed and liquefied by the auxiliary condenser 41 and the condenser 42 as described above,
After being throttled by the expansion valve 46, it is supplied to the evaporation pipe 2,
Then, it evaporates and cools the cooler 1. The microcomputer 25 operates the fan 22 for cooling the condenser while closing the relays R2 and R4 to supply water, and
The relay R3 is closed, the circulation pump 9 is operated, and the water tank 6
The water inside is circulated through the fountain holes to each ice making chamber 1A.

Thereafter, the microcomputer 25 supplies a predetermined amount of water to the water tank 6 based on the water level switch WLSW. When the water level switch WLSW detects a predetermined full water level, the relay R4 is opened and the water supply solenoid valve 12 is closed. Stop water supply. The microcomputer 25 is shown in FIG.
In step S81 of 3, the discharge pressure of the circulation pump 9 is taken in based on the WP sensor 52, and in step S82 it is determined whether or not the pressure has risen to the predetermined high pressure. On the other hand, when the ice grows in the ice making chamber 1A, the fountain hole and the ice gradually come close to each other, so that the discharge pressure of the circulation pump 9 rises. Then, the microcomputer 25 waits until the discharge pressure of the circulation pump 9 rises to the predetermined high pressure, and when it rises, the microcomputer 25 proceeds to step S83.

In step S83, the microcomputer 25 takes in the temperature of the condenser 42 based on the output of the CT sensor 31 and determines whether the temperature of the condenser 42 is + 20 ° C. or lower. When the result in step S83 is NO, the microcomputer 25 proceeds to step S84, and this time determines whether or not the temperature of the condenser 42 is + 35 ° C. or lower. If the result is no, the microcomputer 25 proceeds from step S84 to step S85 to determine whether the temperature of the condenser 42 is + 45 ° C. or lower. If the result is no, the microcomputer 25 proceeds to step S94.
It is judged whether or not the integrated value of the 1 minute 30 second timer which 5 has as its function has passed 1 minute 30 seconds after the step S82, and if not 1 waits for 1 minute 30 seconds.

When 1 minute and 30 seconds have passed, that is, when the ice making is completed, the microcomputer 25
Proceeding to step S16 of FIG. 6, the relay R2 and the relay R
3, the fan 22 and the circulation pump 9 for cooling the condenser are opened.
To stop. Next, the relays R5 and R7 are closed, the switching relay R6 is closed to the contact a side, the deceleration motor 10 is normally rotated, the tilting of the water tray 5 is started, and the hot gas solenoid valve 23 is opened to evaporate. The high-temperature high-pressure gas refrigerant (hot gas) is circulated in the pipe 2 to heat the cooler 1 and the ice-making chamber 1A shifts to the ice-freezing step. After this ice-breaking process, the process is performed as described above.

On the other hand, when the outside air temperature is low such as in winter and the temperature of the condenser 42 has dropped to + 20 ° C. or less at the time of step S83, the microcomputer 25 proceeds from step S83 to step S86 and relays. The fan 22 for cooling the condenser is stopped by opening R2. And
In step S87, it is determined whether or not the integrated value of the 1 minute 30 second timer that the microcomputer 25 also has as its function has passed 1 minute 30 seconds after step S82.
If not, wait for 1 minute 30 seconds and then step S1
Proceed to No. 6 ice clearance process.

That is, when the temperature of the condenser 42 is below + 20 ° C. at the time when the discharge pressure of the circulation pump 9 rises to a predetermined high pressure 1 minute 30 seconds before the completion of ice making,
After that, the microcomputer 25 stops the condenser cooling fan 22 for 1 minute and 30 seconds until the ice making is completed, and then shifts to the ice removing process.

If the temperature of the condenser 42 is higher than + 20 ° C. but not higher than + 35 ° C., the microcomputer 25 advances from step S84 to step S88, and the microcomputer 25 also has a 30-second timer which has its function. It is determined whether or not the integrated value has passed 30 seconds after the step S82, and if not, wait for 30 seconds. After 30 seconds, the microcomputer 2
In step S89, the relay R2 is opened in the same manner as described above to stop the condenser cooling fan 22.

Next, in step S90, it is determined whether or not the integrated value of the 1-minute timer, which the microcomputer 25 also has as its function, has passed one minute after step S88. Wait for step S1
Proceed to No. 6 ice clearance process. That is, if the temperature of the condenser 42 is higher than + 20 ° C. and lower than + 35 ° C. at the time when the discharge pressure of the circulation pump 9 rises to a predetermined high pressure 1 minute 30 seconds before the completion of ice making, the microcomputer 25 After the lapse of 30 seconds, the fan 22 for cooling the condenser is stopped for 1 minute until the ice making is completed, and then the ice removing process is started.

Further, when the temperature of the condenser 42 is higher than + 35 ° C. but not higher than + 45 ° C., the microcomputer 25 advances from step S85 to step S91, and the microcomputer 25 also has a one-minute timer as a function thereof. It is determined whether or not the integrated value has passed one minute after the step S82, and if not, wait for one minute. After one minute, the microcomputer 25 proceeds to step S92 to open the relay R2 and stop the condenser cooling fan 22 as described above. Next, step S9
In step 3, it is judged whether the integrated value of the 30-second timer which the microcomputer 25 also has as its function has passed 30 seconds, and if not, wait 30 seconds and then step S
Proceed to 16 ice removal steps.

That is, when the temperature of the condenser 42 is higher than + 35 ° C. and lower than + 45 ° C. at the time when the discharge pressure of the circulation pump 9 rises to a predetermined high pressure 1 minute 30 seconds before the completion of ice making, After the lapse of one minute, the microcomputer 25 stops the condenser cooling fan 22 for 30 seconds until the ice making is completed, and then shifts to the ice removing process.
In the embodiment, the discharge pressure of the circulation pump 9 is detected by the WP sensor 52, but the invention is not limited to this, and the water pressure ejected from the fountain hole may be detected.

As described above, in the present invention, the water temperature detected by the water level switch WLSW by the temperature (-18 ° C.) of the cooler 1 detected by the ET sensor 26 at 1 minute 30 seconds before the completion of the ice making process. Detected by the low water level in the tank 6, or by the pressure in the cooler 1 detected by the EP sensor 51 (0.8 kg / square centimeter), or by the discharge high pressure of the circulation pump 9 detected by the WP sensor 52, Based on the output of the CT sensor 31, the microcomputer 25 stops the condenser cooling fan 22 when the temperature of the condenser 42 is low.

Therefore, particularly at the time of entering the ice-freezing process when the outside temperature is low, the temperature or pressure of the high-temperature refrigerant discharged from the compressor 21 can be increased and the temperature can be increased thereafter. The ice removal process can be completed quickly. As a result, the ice making capacity of the ice making machine I can be improved and at the same time, the deformation of the ice can be prevented. Also, since it does not affect the start of the ice removal process,
The occurrence of overcooling in the cooler 1 is also eliminated, and it is possible to prevent damage to other devices due to an excessive load caused thereby.

Particularly, in the embodiment, the time for stopping the fan 22 is changed according to the temperature of the condenser 42, so that the fan 22 is stopped for a long time when the temperature is low and short when the temperature is relatively high. It is possible to stabilize the temperature of the condenser 42 at the time of entering the stroke and prevent it from becoming higher than necessary. Moreover, since the temperature of the condenser 42 is raised immediately before the end of the ice making process, it is possible to speed up the ice making process and the ice removing process without impairing the cooling capacity of the evaporation pipe 2 of the cooler 1 in the ice making process. It will be possible.

Although the so-called reverse cell type ice making machine has been described in the embodiment, the present invention is not limited to the so-called plate type or downflow type ice making machine. Further, each value shown in the embodiment is not limited to that, and may be appropriately determined according to the capability of the ice making machine.

[0086]

As described above in detail, according to the invention of claim 1, when the temperature of the cooler drops to a predetermined temperature in the ice making process, after stopping the condenser cooling means for a predetermined period,
Since it is arranged to shift to the ice-freezing process, by setting the predetermined temperature of the cooler to a temperature before the predetermined period when the ice-making process is finished, particularly when the ice-freezing process is started at a low outside temperature or the like. The temperature or pressure of the refrigerant discharged from the compressor can be increased.

Therefore, it is possible to quickly end the subsequent ice-releasing process to improve the ice-making ability and prevent deformation of the ice. Further, since the ice making process is not extended, the occurrence of supercooling is eliminated, and the inconvenience that the equipment is damaged by an excessive load due to it is also avoided.

According to the second aspect of the present invention, when the water level in the storage portion drops to a predetermined value during the ice making process,
Since the condenser cooling means is stopped for a predetermined period of time and then moved to the ice removing process, by setting the predetermined water level of the storage unit to the water level before the predetermined period of time when the ice making process is completed, it is The temperature or pressure of the refrigerant discharged from the compressor can be increased at the time of entering the ice-freezing process when the temperature is high.

Therefore, it is possible to quickly end the subsequent ice-releasing process to improve the ice-making ability and to prevent deformation of the ice. Further, since the ice making process is not extended, the occurrence of supercooling is eliminated, and the inconvenience that the equipment is damaged by an excessive load due to it is also avoided.

According to the third aspect of the invention, when the pressure in the cooler drops to a predetermined value during the ice making process,
Since the condenser cooling means is stopped for a predetermined period of time and then the ice-removing process is started, the predetermined pressure of the cooler is set to a pressure before the predetermined period of time when the ice-making process is completed. The temperature or pressure of the refrigerant discharged from the compressor can be increased at the time of entering the ice-freezing process when the temperature is high.

Therefore, it is possible to quickly end the subsequent ice-releasing process to improve the ice-making ability and prevent the deformation of the ice. Further, since the ice making process is not extended, the occurrence of supercooling is eliminated, and the inconvenience that the equipment is damaged by an excessive load due to it is also avoided.

Further, according to the invention of claim 4, when the pressure in the circulation path of the ice making water discharged from the circulation pump to the cooler rises to a predetermined value in the ice making process, the condenser cooling means is set to a predetermined value. Since the ice-breaking process is shifted to after the period has been stopped, by setting the predetermined pressure as a pressure before the predetermined period of time when the ice-making process ends, the ice-breaking process is started especially when the outside temperature is low. The temperature or pressure of the refrigerant discharged from the compressor at that time can be increased.

Therefore, it is possible to quickly end the subsequent ice-releasing process to improve the ice-making ability and prevent deformation of the ice. Further, since the ice making process is not extended, the occurrence of supercooling is eliminated, and the inconvenience that the equipment is damaged by an excessive load due to it is also avoided.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of a control device for an ice making machine according to the present invention.

FIG. 2 is a side view of an ice making chamber portion of the ice making machine with the water tray in a horizontal closed position.

FIG. 3 is a side view of an ice making chamber portion of the ice making machine in a state where the water tray is in the inclined open position.

FIG. 4 is a refrigerant circuit diagram of the cooling device of the ice making machine of the present invention.

FIG. 5 is a flowchart showing a program of a microcomputer.

FIG. 6 is a flow chart showing a program of the same microcomputer.

FIG. 7 is an operation process diagram of the ice maker.

FIG. 8 is likewise an operation process chart of the ice maker.

FIG. 9 is also an operation process chart of the ice making machine.

FIG. 10 is a flowchart showing a program of a microcomputer for explaining the operation during the ice making process.

FIG. 11 is a flowchart showing another program of the microcomputer for explaining the operation during the ice making process.

FIG. 12 is a flow chart showing still another program of the microcomputer for explaining the operation during the ice making process.

FIG. 13 is a flow chart showing still another program of the microcomputer for explaining the operation during the ice making process.

[Explanation of Codes] I Ice Maker R Refrigerator 1 Cooler 1A Ice Maker 2 Evaporation Pipe 5 Water Tray 6 Water Tank 9 Circulation Pump 20 Controller 21 Compressor 22 Fan 25 Microcomputer 26 ET Sensor 31 CT Sensor 42 Condenser 46 Expansion valve 51 EP sensor 52 WP sensor WLSW Water level switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuyoshi Nakamura 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (4)

[Claims] 1. A cooling device comprising a compressor, a condenser, a decompression device and a cooler, wherein the high temperature refrigerant discharged from the compressor is condensed in the condenser, and the high temperature refrigerant is discharged to the cooler via the decompression device. In the ice making machine, in which the ice making water is circulated in the cooler to perform the ice making process, and the high temperature refrigerant discharged from the compressor is caused to flow into the cooler to perform the ice removing process, the condenser A condenser cooling means for cooling the condenser, a condenser temperature detecting means for detecting the temperature of the condenser, and a control means for controlling the operation of the condenser cooling means, the control means in the ice making process, On the basis of the output of the cooler temperature detecting means, when the temperature of the cooler drops to a predetermined temperature, the condenser cooling means is stopped for a predetermined period, and then the ice removing process is performed. Ice machine. 2. A cooling device comprising a compressor, a condenser, a decompression device, and a cooler, wherein the high-temperature refrigerant discharged from the compressor is condensed in the condenser, and the high-temperature refrigerant is condensed into the cooler via the decompression device. Inflow, and, while performing the ice making process by circulating the ice making water in the storage part in the cooler, in the ice making machine that performs the ice removing process by flowing the high temperature refrigerant discharged from the compressor into the cooler, A condenser cooling means for cooling the condenser, a water level detecting means for detecting the water level of the ice making water in the storage portion, and a control means for controlling the operation of the condenser cooling means, the control means being In the ice making process, based on the output of the water level detecting device, when the water level in the storage unit drops to a predetermined value, the condenser cooling device is stopped for a predetermined period, and then the ice removing process is performed. And ice machine. 3. A cooling device comprising a compressor, a condenser, a decompression device and a cooler, wherein the high temperature refrigerant discharged from the compressor is condensed in the condenser, and the high temperature refrigerant is discharged to the cooler via the decompression device. In the ice making machine, in which the ice making water is circulated in the cooler to perform the ice making process, and the high temperature refrigerant discharged from the compressor is caused to flow into the cooler to perform the ice removing process, the condenser A cooling means for cooling the condenser, a cooling means pressure detecting means for detecting the pressure in the cooling means, and a control means for controlling the operation of the cooling means for the condenser, the controlling means in the ice making process. , Based on the output of the cooler pressure detection means, when the pressure in the cooler drops to a predetermined value, after stopping the condenser cooling means for a predetermined period,
An ice-making machine, characterized by shifting to the ice-free process. 4. A cooling device comprising a compressor, a condenser, a decompression device, and a cooler, wherein the high-temperature refrigerant discharged from the compressor is condensed in the condenser, and then the high-temperature refrigerant is discharged to the cooler via the decompression device. Inflow, and, while the ice making water is circulated in the cooler by the circulation pump to perform the ice making process, the high temperature refrigerant discharged from the compressor is made to flow into the cooler to perform the ice removing process, Condenser cooling means for cooling the condenser, discharge water pressure detection means for detecting the pressure in the circulation path of the ice making water discharged from the circulation pump to the cooler, and operation of the condenser cooling means are controlled. A control means, wherein the control means stops the condenser cooling means for a predetermined period when the pressure rises to a predetermined value based on the output of the discharge water pressure detection means in the ice making process. , Said separation Ice-making machine, characterized in that the transition to a stroke.