JPH0829045A - Cooling device for slot machine - Google Patents

Abstract

PURPOSE:To prevent the trouble of whole of a cooling device by a method wherein a motor for ventilating a condenser is operated at the time of overload, an alarming device is operated upon the clogging of a condenser filter and the operation of a compressor is stopped at the time of uncommonness. CONSTITUTION:A compressor temperature detecting means 9 detects the temperature of a compressor 7 and only when the temperature has become higher than a temperature A, set arbitrarily by a temperature setting means 12, upon overload, a motor 6 for ventilating a condenser is operated to increase the cooling effect of the compressor 7 whereby the temperature rise of the compressor 7 can be prevented. On the other hand, when a condenser filter 10 is clogged, an alarming device 11 is operated only when the temperature has become higher than a temperature B, set arbitrarily by the temperature setting means 12, whereby the sweeping of clogging of the condenser filter 10 is promoted. Further, upon abnormality, such as the trouble of the motor 6 for ventilating the condenser or the like, the operation of the compressor 7 is stopped forcibly only when the temperature has become higher than a temperature C, set arbitrarily by the temperature setting means 12, whereby the trouble of not only the compressor 7 but also the whole of a cooling device can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for an automatic vending machine, which cools or heats the inside of a product storage box to sell the product.

[0002]

2. Description of the Related Art Recently, in a cooling device for a vending machine, as disclosed in Japanese Utility Model Laid-Open No. 60-60685,
Without increasing the operating rate of the compressor, increasing the operating rate of the electric motor for blowing the condenser and increasing the volume of air passing through the evaporating dish can increase the amount and speed of wastewater treatment from the inside. It was In addition, due to problems such as the road protruding from the vending machine, the installation conditions have deteriorated, exhausting has become difficult, and the burden on the cooling device has increased.

An example of a conventional cooling device for a vending machine will be described below with reference to FIGS. 6 and 7.
In FIGS. 6 and 7, 1 is a main body of an automatic vending machine, 2 is a product storage box, 3 is an electric motor for blowing air inside the storage box 2 forcibly circulating air in the storage box, 4 is an evaporator, and each of the above is the automatic sales It is installed in the machine body 1. Further, a condenser 5, a condenser blower electric motor 6, and a compressor 7 are continuously arranged in a straight line below the vending machine body 1. 8 is a forced ventilation type evaporation dish, which has a container shape with an open top. Then, the defrost water from the evaporator 4 is collected, collected and evaporated. Further, the evaporation tray 8 is arranged at a position where it is easy to receive the air blow from the electric motor 6 for blowing the condenser.

The operation of the cooling device for the vending machine configured as described above will be described below with reference to FIGS. 6 and 7.

The refrigerant compressed by the compressor 7 is cooled and condensed in the condenser 5 by the condenser blowing motor 6. The condensed refrigerant is subjected to adiabatic expansion and then evaporated in the evaporator 4, and the evaporator 4 is cooled. The air cooled by the evaporator 4 is circulated by the air blowing electric motor 3 to cool the product storage 2.

[0006]

However, in the conventional cooling device for a vending machine having the above-mentioned structure, the electric motor 6 for blowing the condenser is not limited to the overloaded state such as when the outside temperature is high, and the condenser blower motor 6 is changed depending on the amount of defrost water. As a result, the life of the condenser blower electric motor 6 is shortened, and the temperatures of the condenser 5 and the compressor 7 are too high in an overloaded state, which causes a problem in terms of reliability of the cooling device. Further, the condenser blower electric motor 6 fails or is assembled wrongly, so that the condenser blower electric motor 6 does not operate, or the condenser 5 is clogged to reduce the air volume, and the compressor 7 and the condenser 5 are abnormal. Even if the temperature becomes extremely high, the cooling device operates, and although the overload device works with electrical protection,
There is a problem that the compressor 7 is not mechanically protected and the entire cooling device is broken.

The present invention solves the above-mentioned problems of the prior art by operating the electric motor for blowing the condenser at the time of overload to enhance the cooling effect of the compressor and activate the warning device when the condenser filter is clogged. It is an object of the present invention to provide a cooling device for a vending machine, which can prevent the failure of the entire cooling device by stopping the operation of the compressor when an abnormality occurs.

[0008]

In order to achieve the above object, in a cooling device for a vending machine according to the present invention, a compressor, a condenser, and a condenser blower for cooling the compressor and the condenser. An electric motor, a condenser filter provided in front of the condenser and a compressor temperature detecting means for detecting the temperature of the compressor, and a temperature preset by the temperature setting means are stored and detected by the compressor temperature detecting means. An arithmetic processing unit for comparing with the temperature,
According to a signal from the arithmetic processing unit, the electric motor for blowing the condenser or the warning device that operates when the condenser filter is clogged, or the control unit that operates the compressor is configured.

Further, a compressor, a condenser, a motor for blowing the condenser for cooling the compressor and the condenser, a condenser filter provided in front of the condenser, and a condenser temperature for detecting the temperature of the condenser. An electric motor for blowing the condenser according to a signal from the detecting unit and a temperature processing unit that stores a temperature preset by the temperature setting unit and compares the temperature with the temperature detected by the condenser temperature detecting unit. Or a warning device that operates when the condenser filter is clogged, or a control means that operates the compressor.

[0010]

The cooling device for a vending machine according to the present invention having the above-mentioned structure detects the temperature of the compressor and operates the electric motor for blowing the condenser when the load is high, such as when the outside temperature is high. Enhances the cooling effect of the condenser, and when the condenser filter is clogged, a warning device is activated to prompt cleaning of the condenser filter.
When an abnormality occurs, the operation of the compressor is stopped to prevent the failure of the entire cooling device.

In addition, when the load is overloaded, the temperature of the condenser is detected and the electric motor for blowing the condenser is operated to enhance the cooling effect of the compressor. When the condenser filter is clogged, the warning device is activated, and the condenser is activated. It is possible to prevent the failure of the entire cooling device by urging the filter to be cleaned and stopping the operation of the compressor when an abnormality occurs.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cooling device for a vending machine according to a first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a sectional view of a cooling device of a first embodiment of a vending machine according to the present invention, and the explanation of the same components as those of the conventional example will be omitted.

In FIG. 1, 5 is a condenser, 6 is an electric motor for blowing the condenser, and 7 is a compressor.
Are arranged on a straight line in order from the front. The compressor 7
Is arranged at a position where it is easy to receive the air blow from the condenser air blow electric motor 6. Reference numeral 8 denotes a forced ventilation type evaporation tray, which is in the shape of a container with an open top surface and collects defrosting water to collect and evaporate it. Reference numeral 9 is a compressor temperature detecting means provided in the compressor 7 for detecting the temperature of the compressor 7, 10 is a condenser filter provided in front of the condenser 5, and 11 is a warning device for notifying clogging of the condenser filter 10. Is.

FIG. 2 is a block diagram of the control device for the cooling device of the vending machine according to the first embodiment of the present invention.

In FIG. 2, reference numeral 12 is a temperature setting means for setting the temperature at which the electric motor 6 for blowing the condenser is operated, the temperature at which the warning device 11 is activated, and the temperature at which the compressor 7 is stopped. 13 is an arithmetic processing unit that stores the temperature preset by the temperature setting unit 12 and compares the temperature with the temperature detected by the compressor temperature detecting unit 9, and 14 is a first signal based on a signal from the arithmetic processing unit 13. Relay 15, second relay 1
6, and control means for controlling the third relay 17, 18
Is a first contact of the first relay 15, and the condenser blowing motor 6 is connected between power supply lines. 19
Is a second contact of the second relay 16, and the warning device 11 is connected between power supply lines. Reference numeral 20 is a third contact of the third relay 17, and the compressor 7 is connected between power supply lines.

The operation of the cooling device for the vending machine configured as described above will be described with reference to FIG.

In STEP 1, the temperature setting means 12 sets in advance the temperature at which the condenser blowing motor 6 is operated regardless of whether the compressor 7 is ON or OFF when the load is overloaded. The temperature at which the warning device 11 is activated by the clogging of the condenser filter 10 is set as the temperature B in advance. In addition, the temperature at which the compressor 7 is forcibly stopped in the event of an abnormality such as a failure of the condenser blowing motor 6 is set as the temperature C in advance.

In STEP 2, the compressor temperature detecting means 9 causes the temperature A set by the temperature setting means 12
When the above temperature is detected, in STEP 3, the first relay 15 is excited via the control means 14, the first contact 18 is closed, and the condenser blowing motor 6 is operated. In STEP 2, when the compressor temperature detecting means 9 detects a temperature equal to or lower than the temperature A set by the temperature setting means 12, the normal operation is performed, and the condenser blower electric motor 6 is operated in synchronization with the compressor 7. To do.

In STEP 4, the compressor temperature detection means 9 causes the temperature B set by the temperature setting means 12
When the above temperature is detected, in STEP 5, the second relay 16 is excited via the control means 14, the second contact 19 is closed, and the warning device 11 is operated. In STEP 4, the compressor temperature detecting means 9
When the temperature lower than the temperature B set by the temperature setting means 12 is detected, the process returns to the step before STEP2.
Performs the following operations.

In STEP 6, the compressor temperature detecting means 9 causes the temperature C set by the temperature setting means 12 to be set.
When the above temperature is detected, in STEP 7, the third relay 17 is excited via the control means 14, the third contact 20 is opened, and the operation of the compressor 7 is forcibly stopped. When the compressor temperature detecting means 9 detects a temperature equal to or lower than the temperature C set by the temperature setting means 12 in STEP 6, the process returns to the step before STEP 2, S
The operation after TEP2 will be repeated.

As described above, according to the present embodiment, the compressor temperature detecting means 9 detects the temperature of the compressor 7, and at the time of overload, the temperature is set to the temperature A or more arbitrarily set by the temperature setting means 12. Only when it becomes, the condenser blower electric motor 6 is operated regardless of whether the compressor 7 is ON or OFF to enhance the cooling effect of the compressor 7 and prevent the temperature rise of the compressor 7. it can. Further, when the condenser filter 10 is clogged, the warning device 11 is operated only when the temperature B arbitrarily set by the temperature setting means 12 or higher is reached to prompt the clogging cleaning of the condenser filter 10. be able to.

Further, at the time of an abnormality such as a failure of the condenser blowing motor 6, the compressor 7 is operated only when the temperature C is arbitrarily set by the temperature setting means 12 or more.
It is possible to prevent the failure of not only the compressor 7 but also the entire cooling device in advance. A warning lamp, a warning buzzer or the like may be used as the warning device 11.

Next, a cooling device for a vending machine according to a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. The detailed description of the same components as those of the conventional example and the first embodiment, which have already been described, will be omitted.

FIG. 4 shows a sectional view of a cooling device for a vending machine according to a second embodiment of the present invention, and FIG. 5 shows a second embodiment of the present invention.
FIG. 6 is a block diagram of a control device for a cooling device of a vending machine according to the embodiment of the present invention.

In FIG. 4, reference numeral 21 denotes a condenser temperature detecting means for detecting the temperature of the condenser 5.

Reference numeral 12 is a temperature setting means for setting the temperature at which the condenser blowing motor 6 is operated, the temperature at which the warning device 11 is activated, and the temperature at which the compressor 7 is stopped. 13 is an arithmetic processing unit that stores the temperature preset by the temperature setting unit 12, and compares the temperature with the temperature detected by the condenser temperature detecting unit 21, and 14 is a signal from the arithmetic processing unit 13.
1st relay 15, 2nd relay 16, 3rd relay 1
It is a control means for controlling 7. Reference numeral 18 is a first contact of the first relay 15, and the condenser blower electric motor 6 is connected between power supply lines. Reference numeral 19 is a second contact of the second relay 16, and the warning device 1 is provided between power lines.
1 is connected. Reference numeral 20 is a third contact of the third relay 17, and the compressor 7 is connected between power supply lines.

The operation of the cooling device for the vending machine configured as described above will be described with reference to FIG.

In STEP 1, the temperature setting means 12 sets in advance the temperature A at which the condenser blowing motor 6 is operated regardless of whether the compressor 7 is ON or OFF when overloaded. Also, the temperature at which the warning device 11 is activated due to clogging of the condenser filter 10 is set to the temperature B in advance.
Set as. Further, the temperature at which the compressor 7 is forcibly stopped in the event of an abnormality such as a failure of the condenser blowing motor 6 is set as the temperature C in advance.

In STEP 2, when the condenser temperature detecting means 21 detects a temperature higher than the temperature A set by the temperature setting means 12, the first relay 15 is turned on via the control means 14 in STEP 3. Excited,
The first contact 18 is closed and the condenser blower electric motor 6
To drive. In STEP 2, if the condenser temperature detecting means 21 detects a temperature equal to or lower than the temperature A set by the temperature setting means 12, normal operation is performed, and the condenser blowing motor 6 is operated in synchronization with the compressor 7. To do.

In STEP 4, the condenser temperature detecting means 21 sets the temperature B set by the temperature setting means 12.
When the above temperature is detected, in STEP 5, the second relay 16 is excited via the control means 14,
The second contact 19 is closed and the warning device 11 is activated. Incidentally, in STEP 4, the condenser temperature detecting means 21
When the temperature lower than the temperature B set by the temperature setting means 12 is detected, the process returns to the step before STEP 2, STE
The operation after P2 is performed.

In STEP 6, the condenser temperature detecting means 21 sets the temperature C set by the temperature setting means 12.
When the above temperature is detected, in STEP 7, the third relay 17 is excited via the control means 14,
The third contact 20 is opened to forcibly stop the operation of the compressor 7. If the condenser temperature detecting means 21 detects a temperature equal to or lower than the temperature C set by the temperature setting means 12 in STEP6, the operation returns to STEP2.
The operations after STEP 2 are repeated.

As described above, according to the present embodiment, the condenser temperature detecting means 21 detects the temperature of the condenser 5, and at the time of overload, the temperature is not lower than the temperature A arbitrarily set by the temperature setting means 12. Only at this time, the condenser blower electric motor 6 can be operated regardless of whether the compressor 7 is ON or OFF, the cooling effect of the compressor 7 can be enhanced, and the temperature rise of the compressor 7 can be prevented.

Further, when the condenser blower electric motor 6 is out of order or when the condenser 5 is clogged or the like, the compressor is operated only when the temperature B is arbitrarily set by the temperature setting means 12 or higher. The operation of 7 can be forcibly stopped, and the failure of not only the compressor 7 but also the entire cooling device can be prevented.

[0035]

The cooling device for a vending machine of the present invention constructed as described above has the following effects.

A compressor, a condenser, an electric motor for blowing the condenser for cooling the compressor and the condenser, a condenser filter provided in front of the condenser, and a temperature detection for detecting the temperature of the compressor or the condenser. Means for storing the temperature preset by the temperature setting means and comparing it with the temperature detected by the temperature detecting means, and from the arithmetic processing section only when the temperature is higher than the temperature preset by the temperature setting means. Temperature control means for operating the condenser blower electric motor, operating a warning device for notifying clogging of the condenser filter, and stopping the operation of the compressor according to the signal Detects the temperature of the compressor or the condenser, and at the time of overload, only when the temperature is arbitrarily set by the temperature setting means or higher, the condenser blower motor is turned on-of the compressor. Is operated regardless enhance the cooling effect of the compressor, it is possible to prevent the temperature rise of the compressor. Further, when the condenser filter is clogged, the warning device can be activated only when the temperature is arbitrarily set by the temperature setting means or above to prompt the cleaning of the condenser filter.

Further, in the abnormal state such as a failure of the condenser blower electric motor, the operation of the compressor is forcibly stopped only when the temperature is arbitrarily set by the temperature setting means or above, whereby the compression It is possible to prevent the failure of not only the machine but also the entire cooling device.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a cooling device for a vending machine according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a control device of the cooling device.

FIG. 3 is a control flowchart of the cooling device.

FIG. 4 is a vertical sectional view of a cooling device for a vending machine according to a second embodiment of the present invention.

FIG. 5 is a block diagram of a control device of the cooling device.

FIG. 6 is a side sectional view of a conventional cooling device for a vending machine.

FIG. 7 is a vertical sectional view of the cooling device.

[Explanation of symbols]

 5 condenser 6 condenser blower electric motor 7 compressor 9 compressor temperature detecting means 10 condenser filter 11 warning device 12 temperature setting means 13 arithmetic processing section 14 control means 21 condenser temperature detecting means

Claims (2)

[Claims] 1. A compressor, a condenser, a condenser blower electric motor for cooling the compressor and the condenser, a condenser filter provided in front of the condenser, and a compressor temperature for detecting the temperature of the compressor. The condenser blower electric motor is responsive to a signal from the detecting means and a temperature processing means for storing the temperature preset by the temperature setting means and comparing it with the temperature detected by the compressor temperature detecting means. Or a cooling device for a vending machine having a warning device that operates when the condenser filter is clogged, or a control unit that operates the compressor. 2. A compressor, a condenser, a condenser blowing motor for cooling the compressor and the condenser, a condenser filter provided in front of the condenser, and a condenser temperature for detecting the temperature of the condenser. A detection unit, an arithmetic processing unit that stores a temperature preset by the temperature setting unit, and compares the temperature with the temperature detected by the condenser temperature detection unit, and the condenser blower electric motor based on a signal from the arithmetic processing unit, Alternatively, a cooling device for a vending machine having a warning device that operates when the condenser filter is clogged, or a control unit that operates the compressor.