JPH0426853Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to an air/water cooling type condenser, and in particular to a condenser suitable for use in devices with large load fluctuations, such as ice makers.

[Conventional technology]

Since ice makers have large load fluctuations and regularly repeat ice making and deicing cycles, their condensers must be designed with these circumstances in mind. For example, ice makers are usually connected to a water supply facility, such as a water supply system, and are supplied with water from the water supply when they start making ice, so especially during high temperatures in the summer, the considerably hot tap water becomes a load on the evaporator, resulting in so-called high-load operation. It turns out. This high-load operation time continues until the supplied ice-making water reaches approximately 0°C (about 10 minutes), and as ice begins to grow on the ice-making plate, the load gradually becomes lighter. In addition, configurations using various auxiliary condensers are Utility Model Publication No. 46-3643 and Utility Model Application No. 57-
This method has been proposed in JP-A No. 8481 and Japanese Patent Application Laid-Open No. 53-40454.

[Problem that the idea aims to solve]

However, in the conventional ice maker mentioned above, in order to survive high-load operation, waste at light loads is intentionally ignored, and a condenser with a large capacity is used at maximum capacity, although it costs more. Ta. Further, the configuration using the auxiliary condenser described above has a complicated structure and high cost, and ultimately only has auxiliary performance. Furthermore, what is important for an ice maker is to overcome the problems when using hot gas. In other words, it is inappropriate for the condensing capacity to be simply larger than necessary; the condenser capacity must be balanced during ice making and deicing. For example, if the hot gas valve is opened to send the high-temperature gas discharged from the compressor to the evaporator to remove ice after ice making is completed, if the condenser capacity is not balanced, the gas that should flow as hot gas may This caused condensation, which made the deicing time extremely long, and in the worst case, it became impossible to remove the ice. Therefore, an object of the present invention is to provide a condenser which has a completely simple structure and which has a well-balanced condensing capacity during ice making and deicing.

[Means to solve the problem]

To achieve this objective, the present invention provides a water receiving tank that receives water from an ice making water tank of an ice making mechanism and has a drainage part for discharging waste water and an overflow part for discharging overflow water, and a water receiving tank for receiving water from an ice making water tank of an ice making mechanism. a condensing pipe connected to the refrigerant pipe and arranged in the water tank, and a cooling fan installed at a position where the condensing pipe can be air-cooled when there is not enough water in the water tank to submerge the condensing pipe. We provide an air/water cooled condenser that is equipped with:

[Effect]

When there is water in the water tank, the condensing pipe exchanges heat with the water in a water-cooled manner, and when there is no water, the condensing pipe is cooled by a cooling fan as a normal air-cooled type, depending on the load change. The condensing capacity changes. The cooling fan may be installed in the water in the water tank, and in that case, the cooling fan stirs the water to promote cooling.

【Example】

Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which the same reference numerals indicate the same or corresponding parts. In FIG. 1, what is indicated by numeral 1 is:
This ice-making board is made of a flat plate of copper, aluminum, or the like with good heat conduction, and an evaporator 2 is disposed on the back side of this ice-making board 1. The accumulator 3, compressor 4, condensation pipe 5, dryer 6, and capillary reach tube 7 that constitute the ice making mechanism together with the evaporator 2 are as follows:
As shown in the figure, they are connected in a loop-like closed circuit using a copper pipe (refrigerant pipe) 8. Discharge part 4a of compressor 4
is the suction part 2a of the evaporator 2 via the hot gas valve 9.
It is connected to the. An ice-making water tank 10 is located below the ice-making plate 1.
A circulation pump 11 provided in this ice-making tank 10 is connected to a water sprinkler 12 arranged above the ice-making plate 1.
1, the ice making water tank 10
Ice-making water is continuously supplied to the ice-making plate 1 from the water sprinkler 12.
Supplied on the surface. Water supply valve 13 arranged on the ice-making water tank 10
is connected to the external water supply, and ice making water tank 1
Water can be supplied within 0. Overflowing water from an overflow pipe 10a provided in the ice-making water tank 10 is supplied into a water receiving tank 14 disposed at the lowest position via a hose 10b. This hose 10
Since the amount of water overflowing from b is larger than the amount of water discharged from the drainage part 14a formed in the water receiving tank 14, in the deicing process, the wastewater accumulates in the water receiving tank 14, and the water flowing through the water receiving tank 14
The waste is disposed of outside through an overflow part 14b formed at the top. Further, at a position above the water receiving tank 14, a cooling motor 17 having a cooling fan 15 and an output shaft 16 is installed.
is attached to the ice maker body (not shown). Further, a substantially cylindrical flow guiding body 18 is arranged to surround the condensing pipe 5 in the water receiving tank 14. The flow guide body 18 has an opening 18a at the bottom.
is formed, and a widened part 1 with a flattened top is formed.
8b. In the above configuration, when the air/water cooling combined type condenser according to the present invention is operated, when the ice making mechanism such as the compressor 4 is operated and the ice making process begins, the sprinkling of ice making water from the water sprinkler 12 is started. , ice 1a is gradually formed on ice-making plate 1. When a known ice making thermostat or float switch (not shown) detects that the ice 1a has grown to a predetermined size, the ice making process is switched to the deicing process, the hot gas valve 9 is opened, and the compressor is switched on. By supplying the hot gas No. 4 to the inlet 2a of the evaporator 2, the ice making plate 1 is warmed.
Deicing is performed by slightly melting the contact portion of the ice 1a against the ice 1a. Furthermore, when switching to the deicing process, the water supply valve 13 is opened at the same time as the aforementioned hot gas valve 9 is opened, and ice making water for the next ice making process is supplied into the ice making water tank 10. Water is supplied to the overflow pipe 10a of the ice making water tank 10 and the hose 1
It is sent into the water receiving tank 14 through 0b. The end of the de-icing process can generally be known by detecting the fall of the ice 1a from the ice-making plate 1 or the rise in temperature of the ice-making plate 1 accompanying this fall, and when the de-icing process is completed, By closing the hot gas valve 9 and the water supply valve 13, the cooling fan 15 is rotated to start the next ice making process. In the ice making machine described above, when deicing is completed, the temperature of the evaporator 2 is relatively high, at about 15°C, and the water temperature in the ice making water tank 10 at the beginning of the ice making process from the deicing process is the same as that of the water supply valve. The temperature of the evaporator 2 in the initial state during the ice-making process is also high, and the condensation pressure is also high, as the temperature of the evaporator 2 in the initial state during the ice-making process is also high.
At high pressures of Kg/cm ² G to 17 Kg/cm ² G, the compressor 4 will be overloaded and its performance will be significantly impaired. The condenser of the present invention is constructed so that it can perform a sufficient condensing action even under such conditions. Overflowing water flowing down the hose 10b of the ice-making water tank 10 is guided into the water receiving tank 14 and stored therein. In this case, the temperature of the surplus water supplied into the water receiving tank 14 is the same as the temperature of the ice-making residual water in the ice-making water tank 10 (approximately 0
℃), so the water temperature is about 10℃~
The temperature remains relatively low at approximately 15℃. Regarding the water storage status in the water receiving tank 14, the diameter of the drainage part 14a is selected so that the amount of water discharged from the drainage part 14a is sufficiently smaller than the amount of water flowing in from the hose 10b. Even in the open state, water gradually accumulates in the water tank 14, and the water level continues to rise until it reaches the overflow portion 14b. Water is supplied from the water supply valve 13 for the entire period or part of the period during deicing, but the amount of water supplied and the effective volume of the water tank 14 are adjusted so that the water level in the water tank 14 can reach the overflow part 14b during that time. ,
The diameter (that is, the amount of water discharged) of the drainage portion 14a is designed. Therefore, at the start of ice making, the water receiving tank 14 is full of diluted ice water, so the condensation pipe 5
is sufficiently cooled by the cold water as a water-cooled condenser, and has a high condensing capacity. In other words, since the condensing capacity is sufficient during the high load operation at the start of ice making, the pressure does not become high and the load on the compressor 4 is considerably reduced. Furthermore, as the ice-making process continues,
Although the water temperature in the water tank 14 rises, the cooling fan 1
The rotation of 5 promotes evaporation from the water surface,
The latent heat from water evaporation suppresses the rise in water temperature. During this time, water is gradually drained from the drainage part 14a of the water receiving tank 14, and all the water is drained, and the outside air flows from the outside of the guide body 18 as indicated by the arrow A.
The air flows in the order shown by B and C, and the condensing pipe 5 exchanges heat with the outside air. In this case, the water adhering to the wall surface of the water receiving tank 14 and the condensing pipe 5 evaporates, and the condensing pipe 5 is further cooled by the latent heat of vaporization. Thus, in the latter stages of the ice-making process, all the water disappears from the water tank and it becomes dry, operating as a mere air-cooled condenser. This condition is extremely important for the deicing process. As mentioned above, if there is too much condensation capacity even before ice making is complete,
As the load becomes lighter, the low pressure becomes too low, and the initial flow rate of hot gas when the deicing process begins becomes extremely low, which may make the deicing process take longer or, in severe cases, make it impossible to remove the ice. but,
The present invention provides an appropriate condenser capacity at each stage of the ice making process, resulting in a very balanced condensation state. Next, FIGS. 2 to 7 show other embodiments of the condenser according to the present invention, and since the ice making mechanism is the same as that in FIG. It shall be omitted. In FIG. 2, the cooling fan 15 is disposed in the condensing pipe 5, that is, in a submerged position in the water receiving tank 14. In the full water state shown in Fig. 3, the water temperature is approximately 10°C, and if there is water during the ice-making process, the cooling fan 15 stirs the water in the water tank 14, and as the ice-making process progresses, the water temperature gradually increases. When the water level falls and reaches the middle stage of ice making as shown in Fig. 4, the water is splashed onto the condensing pipe 5 by the cooling fan 15, acting as a splash type condenser, and the latent heat of evaporation results in a large amount of condensation. In this case, outside air is guided from the outside of the flow guide body 18 in the order of arrows A→B→C→D and is sucked in by the cooling fan to cool the condensing pipe 5. Furthermore, just before the completion of ice making, the water in the water receiving tank 14 disappears, resulting in the state shown in FIG. 5, and the water droplets adhering to the condensing pipe 5 are also dried, and the condensing pipe 5 is operating as an air-cooled condenser. Also, A, B in Figure 6 and 7
The configurations shown in A and B in the figures are for further improving the condensing capacity of the condenser, and have elongated metal members 19 attached to the inside and outside of the condensing pipe 5 formed in a coil shape. The metal member 19 is
Acts as a radiator and improves heat dissipation effect.
In the configurations A and B in FIG. 6, the metal member 19 is made of a round bar, and in the configurations A and B in FIG.
consists of a rectangular thin plate. Therefore, by using the configurations shown in FIGS. 6 and 7, the cooling effect can be further improved than the configuration using only the condensing pipe 5 described above.

[Effect of the idea]

The air/water cooling type condenser according to the present invention includes a water receiving tank that receives water from an ice making water tank of an ice making mechanism and has a drainage part for discharging waste water and an overflow part for discharging overflow water, and a water receiving tank that receives water from an ice making water tank of an ice making mechanism. a condensing pipe connected to the refrigerant pipe and arranged in the water tank, and a cooling fan installed at a position where the condensing pipe can be air-cooled when there is not enough water in the water tank to submerge the condensing pipe. Because of this, the following effects can be achieved. (1) It functions as a water-cooled condenser during the early stage of the ice-making process and as an air-cooled condenser during the latter stages of the ice-making process, allowing the condenser to operate at its optimum capacity, thereby improving both ice-making and de-icing capabilities. (2) Overload of the compressor at the initial stage of ice making can be prevented. (3) Cooling water, which was previously wasted, can be used effectively. (4) Since the water tank is drained after each process, there is no need for special cleaning, and since no dirt or the like adheres to the water tank, it is possible to prevent the cooling effect from deteriorating. In addition, according to a preferred embodiment of the present invention, the cooling fan is submerged in the water tank, so that a single motor and cooling fan are used to agitate water at the initial stage of ice making and prevent water from splashing during ice making. It can be performed in a series of operations, resulting in a condenser capacity suitably adapted to each stage of the ice-making process. Furthermore, the time required to reduce the amount of water in the water tank can be adjusted freely by adjusting the hole diameter (in other words, the drainage capacity) according to the timing of water cooling, splashing, and air cooling. A wide range of optimum condensing capacity characteristics can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an ice making machine equipped with an air/water cooling type condenser according to the present invention, and FIG. 2 is a configuration diagram showing a state in which a condenser according to another embodiment of the present invention is applied to the ice making machine. Fig. 3 is an explanatory diagram of the embodiment shown in Fig. 2 when the water is full, Fig. 4 is an explanatory diagram of the state in the middle stage of ice making when the water is reduced, and Fig. 5 is also an explanatory diagram of the state in which the water is completely depleted. An explanatory diagram of the folded state, A and B in Fig. 6 are perspective views and plan views showing another embodiment of the condenser pipe, and A and B in Fig. 7 are plane views showing still another embodiment of the condenser pipe. FIG. 2 is a diagram and a perspective view. 5... Condensing pipe, 8... Copper pipe (refrigerant pipe of ice making mechanism), 10... Water tank for ice making, 14... Water receiving tank, 14a... Drainage section, 14b... Overflow section, 15... Cooling fan.

Claims (1)

[Scope of utility model registration request] A drainage part 14a for receiving water from the ice-making water tank 10 of the ice-making mechanism and for discharging waste water, and an overflow part 14b for discharging overflow water.
a condensing pipe 5 connected to the refrigerant pipe of the ice making mechanism and disposed within the water receiving tank 14; when there is not enough water in the water receiving tank 14 to immerse the condensing pipe 5; An air/water cooling type condenser equipped with a cooling fan 15 provided at a position where the condensing pipe 5 can be air cooled.