JP2001101507A - Cooling device for vending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device for vending machine which can reduce its power consumption without increasing the power consumption when an automatic vending machine sells commodities, is switched to a hot mode from a cold mode, or vice versa, and is packed with commodities and, in addition, can improve the reliability of its compressor. SOLUTION: A cooling device for a vending machine is composed of a refrigerant circuit 8A constituted by successively annularly connecting a compressor 4A having a variable operating frequency, constricting devices 7 respectively provided for commodity housing chambers 1, and a cooler 2 through pipes; an operation control means 14 for compressor which operates the compressor 4A at a commanded operating frequency, a number-of-cooled chamber detecting means 17 which detect the number of cooled commodity housing chambers 1. The cooling device also has a cooling control means 18A which commands a lower operating frequency to the control means 14 as the number of cooling chambers becomes smaller. Therefore, the cooling device can be controlled with the load corresponding to the number of commodity housing chambers 1 in a cooling mode and, when the load is small, the power consumption of the cooling device can be reduced by lowering the operating frequency of the compressor 4A. In addition, the service life of the cooling device can be prolonged by reducing the wear of the mechanical section of the compressor 4A by lowering the operating frequency of the compressor 4A, and so on.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vending machine cooling apparatus for selling or selling products by cooling or heating a product storage room.

[0002]

2. Description of the Related Art In recent years, with the diversification of vending machine sales products, the number of products that can sell cold products and hot products has been increasing.
In particular, there is an urgent need for energy-saving technologies for preventing global warming and products with high reliability and long life.

A conventional hot and cold type vending machine having a multi-commodity storage room capable of switching between a cold mode and a hot mode is disclosed in Japanese Patent Laid-Open No. 6-6 / 1994.
No. 0262.

Hereinafter, a conventional vending machine will be described with reference to the drawings.

FIG. 24 is a schematic configuration diagram of a conventional vending machine. In FIG. 24, reference numeral 1 denotes a main body cabinet of a vending machine. The product storage room 1A is provided with a cooler 2A exclusively for the cooling mode, and the product storage room 1B is provided with the cooler 2B and the heater 3 for both the cooling mode and the heating mode.

The coolers 1A and 1B share one common compressor 4
, And the cooler 2A is connected to the compressor 4 via a refrigerant pipe 8 directly via an electromagnetic valve 5, and the cooler 2A is connected directly to the compressor 4 via an electromagnetic valve 5.

Reference numeral 9 denotes a condenser, which includes a compressor 4 and a cooler 2A.
It is connected between the solenoid valves 5 (expansion valves and the like are omitted for simplicity). Room temperature sensors 10 and 11 each composed of a thermistor are installed in the product storage chambers 1A and 1B, respectively, and the control unit 12 controls the compressor 4 and the solenoid valve 5 on and off based on these temperature signals.

Here, the coolers 2A, 2
An upper limit temperature and a lower limit temperature for ON / OFF control of B are input and stored. A switch 13 for switching between cooling and heating is provided in the product storage room 1B. When this switch is turned on, an energizing circuit for the heater 3 is formed.

The operation of the vending machine configured as described above will be described below.

When the switch 13 is on the cooling side,
When the cooling setting is set for both A and the product storage room 1B, the solenoid valve 5 is opened and the compressor 4 is operated. Thereby, the cooler 2
A refrigerant is supplied to both A and 2B, and the product storage chambers 1A and 1B are cooled. Thereafter, when the temperature of the product storage room 1B becomes lower than the lower limit temperature, the solenoid valve 5 is closed, and when the temperature of the product storage room 1A also becomes lower than the lower limit temperature, the compressor 4 is stopped. In this way, the product storage room 1A and the product storage room 1B are maintained at the cooling temperature in the range from the lower limit temperature to the upper limit temperature.

Next, when the switch 13 is on the heating side and the product storage room 1A is set to be cooled and the product storage room 1B is set to be heated, the solenoid valve 5 is closed to stop the supply of the refrigerant to the cooler 2B. . When the heater 3 is energized and reaches the upper limit temperature for heating, the energization is stopped.

As the refrigerant, a chlorofluorocarbon (hereinafter, referred to as HCFC) or a fluorocarbon such as hydrofluorocarbon (hereinafter, referred to as HFC) is used.

[0013]

However, in the above-described conventional configuration, the structure for cooling the cooling-only product storage room 1A and the cooling / heating product storage room 1B with one compressor 4 is simplified. Although devised, many problems remain from the viewpoint of ensuring energy saving and reliability of the compressor 4.

Since the operation control of the compressor 4 has only two modes of operation and stop, there is a problem that it is not possible to cope with load fluctuations in detail. Here, as a method for finely controlling the temperature of the product in the product storage room 1A dedicated to cooling, it is conceivable to control the operating frequency of the compressor 4 from a low frequency to a high frequency in response to a load change, and to control the air conditioning. Technology has been developed in the field of machines and refrigerators, and it is natural to apply this technology to vending machines.

However, in the case of a vending machine, in addition to the load fluctuation due to the sale of the products in the product storage room 1A and the product storage room 1B, the load fluctuation due to switching between the cold mode and the hot mode, and the load fluctuation at the time of product replenishment. Etc.
There has been a problem that the power consumption becomes excessive and the reliability of the compressor decreases.

The present invention solves the above-mentioned problems, and provides a cooling device for a vending machine capable of saving power consumption without causing an increase in power consumption by finely adjusting a cooling amount in response to a load change. The purpose is to do.

[0017]

In order to achieve this object, the present invention detects the number of rooms in a product storage room which is cooling, and according to the detected number of rooms, the lower the number of rooms, the lower the operating frequency. It is provided with a configuration comprising cooling control means for instructing the compressor.

Thus, the load can be controlled in accordance with the number of product storage rooms in the cooling mode, and when the load is small, the operating frequency of the compressor can be lowered to save energy, and the compressor can be saved. By reducing the frequency of the compressor, the life of the compressor can be improved by reducing the wear of the mechanical part of the compressor. Further, the influence on global warming is extremely small, which can contribute to improving the global environment.

When the commodity temperature detected by the commodity temperature detecting means is higher than a certain temperature, the cooling means comprises a cooling control means for operating the compressor at a low operating frequency until the value counted by the timer means exceeds a certain time. It has.

Accordingly, when the load of the product storage room in the cooling mode is extremely large, the load on the compressor is increased by lowering the operating frequency of the compressor for a certain period of time, and the protection device operates. The cooling can be performed without any trouble, and the reliability of the compressor is improved. In addition, energy can be saved because the operating frequency of the compressor is reduced.
By reducing the frequency of the compressor under a high load, the life of the compressor can be improved by reducing wear of the mechanical parts of the compressor.

When the product temperature detected by the product temperature detecting means is higher than a predetermined temperature, the compressor is operated at a low operating frequency, and when the temperature detected by the system temperature detecting means is lower than the predetermined temperature, a high operation is performed. It is provided with a structure comprising cooling control means for operating the compressor at a frequency.

Thus, the state in which the load exceeds the limit can be accurately estimated, and the operating frequency of the compressor can be reduced only when the load greatly increases, thereby lowering the reliability of the compressor. The effect on the cooling performance can be minimized without the need. Further, energy saving can be achieved because the operating frequency of the compressor is reduced.

Further, the compressor is provided with a cooling control means for operating the compressor at a high operation frequency when the compressor is operated continuously for a certain period of time or more.

Thus, an appropriate cooling capacity can be provided without the operation rate of the compressor exceeding 100% and the cooling performance being unable to be maintained due to the influence of environmental changes, condenser clogging, and the like.

When the temperature detected by the commodity temperature detecting means is high, the compressor is operated at a high operating frequency, and when the temperature detected by the commodity temperature detecting means is low, the compressor is operated at a low operating frequency. And a cooling control means for keeping the operation rate of the compressor constant.

Thus, the operation rate can be set as high as does not affect the cooling performance, and the capacity of the compressor can be maximized with respect to load fluctuation. When the load is small, the operation frequency of the compressor can be increased. Energy savings. Further, by shortening the frequency of the compressor, the life of the compressor can be improved, such as by reducing the wear of the mechanical parts of the compressor.

In addition, according to the number of products sold per unit time in the product storage room in the cooling mode, when the sales volume is large, the compressor is operated at a high operating frequency to simultaneously increase the air volume so that the air volume is increased. And a cooling control unit for instructing the air volume control unit to operate the compressor at a low operation frequency when the sales volume is small and to simultaneously reduce the air volume, and to keep the operation rate of the compressor constant. It has.

Thus, even when the sales volume is large, the load can be controlled by the air volume control, and energy can be saved. Further, by shortening the frequency of the compressor, the life of the compressor can be improved, such as by reducing the wear of the mechanical parts of the compressor.

Also, the heating mode is detected by the mode switching detecting means.
When the switching from the cooling mode to the cooling mode is detected, the cooling means is configured to operate the compressor at a high operating frequency until the value counted by the timer means exceeds a predetermined time.

As a result, the operating frequency of the compressor can be increased for a certain period of time, and the compressor can be cooled quickly to the set temperature, so that a sales opportunity to the customer is not missed. In addition, by rapidly cooling, the operation time at a high operation frequency can be shortened, and the reliability is improved.

When the mode switching detecting means detects the switching from the heating mode to the cooling mode, the compression is performed at a high operating frequency until the temperature detected by the commodity temperature detecting means falls below a predetermined temperature. And a cooling control means for operating the machine.

As a result, the temperature can be quickly cooled to the set temperature, the temperature of the product can be accurately determined, and the number of opportunities at a high operation frequency is reduced, and energy can be saved.

In addition, the system is provided with a cooling control means for operating the compressor at a high operation frequency for a certain period of time after the door is closed by the timer means when the sales volume is large by the product sales number counting means.

Accordingly, the operating frequency of the compressor can be increased for a certain period of time with respect to the high load amount at the time of filling the product, and the compressor can be cooled to the set temperature promptly, so that a sales opportunity to the customer is not missed. Further, opportunities at a high operation frequency are reduced, and energy saving and improvement in reliability of the compressor can be achieved.

Further, when the number of times the temperature detected by the system temperature detecting means exceeds the temperature of the temperature determining means set for each frequency reaches a certain value or more, a cooling control means for displaying a warning by the display means. It is provided with the configuration.

Thus, even if the operating frequency of the compressor is changed in response to a load change, a radiation abnormality due to clogging of the condenser can be detected, and the reliability of the compressor can be ensured.
Further, it is possible to eliminate wasteful consumption of power caused by abnormal heat radiation due to clogging of the condenser or the like.

A correcting section for correcting the temperature curve of the determining means according to the detected outside air temperature, and a cooling means for displaying a warning by the display means when the number of times counted by the abnormal temperature counting means reaches a certain value or more. It is provided with a configuration of control means.

Thus, even if the operating frequency of the compressor is changed in response to a load change, a radiation abnormality due to clogging of the condenser can be detected, and the reliability of the compressor can be ensured.
When the outside air temperature is low and the load on the compressor is predicted to be small, it is possible to determine whether the condenser is clogged or the like before a heat radiation abnormality occurs by correcting the determination means. Further, it is possible to eliminate wasteful consumption of power caused by abnormal heat radiation due to clogging of the condenser or the like.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a compressor having a variable operating frequency, a condenser, and a plurality of merchandise storage chambers provided for each of the plurality of merchandise storage chambers are cooled. Includes a valve that closes in the mode below the lower limit temperature or in the heating mode and opens in the cooling mode above the lower limit temperature, and a product storage room that can be switched between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting a cooler provided for each of the plurality of product storage chambers in a circular pipe connection, and a compressor operation control means for operating the compressor at a commanded operating frequency; A number of cooling chambers detecting means for detecting the number of rooms of the product storage room cooling by the cooler; and a lower operating frequency as the number of rooms is smaller according to the number of rooms detected by the number of cooling chambers detecting means. To the compressor operation control means. It consists of cooling control means, and can be controlled with the load amount according to the number of product storage rooms in the cooling mode. When the load amount is small, the operating frequency of the compressor can be lowered to save energy and the frequency of the compressor can be reduced. Has the effect of reducing the wear of the mechanical part of the compressor and thereby improving the life.

Further, the influence on global warming is extremely small, and it can contribute to improving the global environment.

According to a second aspect of the present invention, there is provided a compressor having a variable operating frequency, a condenser, and a plurality of product storage rooms, each of which is provided with a corresponding product storage room at a cooling mode and lower than the lower limit temperature. And a valve which closes in the heating mode and opens in the cooling mode when the temperature is higher than the lower limit temperature, and the plurality of product storage chambers including a product storage chamber switchable between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting annularly arranged coolers with a pipe, a compressor operation control means for operating the compressor at a commanded operating frequency, a heating mode and a cooling mode Product temperature detecting means provided for each of the plurality of product storage rooms including a product storage room which can be switched between, and timer means for starting counting when the temperature detected by the product temperature detecting means is higher than a predetermined temperature. When, When the commodity temperature detected by the commodity temperature detecting means is higher than a certain temperature, the cooling means comprises a cooling control means for instructing the compressor operation control means a low operating frequency until the value counted by the timer means exceeds a certain time, When the load of the product storage room in the cooling mode is extremely large, the load on the compressor is increased by lowering the operating frequency of the compressor for a certain period of time, so that the compressor can be cooled without operating the protection device and the compressor can be cooled. This has the effect of improving reliability.

Further, energy saving can be achieved by lowering the operating frequency of the compressor, and the life of the compressor can be improved by lowering the frequency of the compressor under a high load by reducing the wear of the mechanical part of the compressor. .

According to a third aspect of the present invention, there is provided a compressor having a variable operation frequency, a condenser, and a plurality of product storage rooms, each of which is provided with a corresponding product storage room in a cooling mode and a temperature lower than a lower limit temperature. And a valve which closes in the heating mode and opens in the cooling mode when the temperature is higher than the lower limit temperature, and the plurality of product storage chambers including a product storage chamber switchable between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting pipes to a cooler provided for each of the pipes, a compressor operation control means for operating the compressor at a commanded operating frequency, and the compressor or the condenser System temperature detecting means for detecting the temperature of the compressor, and when the product temperature detected by the product temperature detecting means is higher than a certain temperature, a low operating frequency is instructed to the compressor operation control means, and the temperature detected by the system temperature detecting means. When the temperature falls below a certain temperature, the compressor comprises cooling control means for instructing the high frequency of operation to the compressor operation control means, and it is possible to accurately estimate a state where the load amount exceeds the limit, and when the load amount greatly increases. Only the operation frequency of the compressor can be lowered, and the effect on the cooling performance can be minimized without lowering the reliability of the compressor. Further, energy saving can be achieved because the operating frequency of the compressor is reduced.

According to a fourth aspect of the present invention, there is provided a compressor having a variable operating frequency, a condenser, and a plurality of commodity storage chambers provided for each of the plurality of commodity storage chambers.
A plurality of valves including a valve which is closed when the temperature is lower than the lower limit temperature or in the heating mode and which is opened in the cooling mode when the temperature is higher than the lower limit temperature, and a product storage chamber which can be switched between a heating mode and a cooling mode. A refrigerant circuit configured by sequentially connecting a cooler provided for each of the product storage chambers in an annular piping, a compressor operation control means for operating the compressor at a commanded operating frequency, Compressor operation detecting means for detecting the operation of the compressor, timer means for starting counting when the compressor starts operating by the compressor operation detecting means, and continuous operation of the compressor for a certain time or more by the timer means In this case, the cooling operation means comprises a cooling control means for instructing the compressor operation control means of a high operation frequency, and the operation rate of the compressor exceeds 100% due to environmental changes, clogging of the condenser, etc., and the cooling performance is maintained. Without not come, it has the effect of being able to provide adequate cooling capacity.

According to a fifth aspect of the present invention, there is provided a compressor having a variable operating frequency, a condenser, and a plurality of product storage rooms, each of which is provided with a corresponding product storage room at a cooling mode and lower than the lower limit temperature. And a valve which closes in the heating mode and opens in the cooling mode when the temperature is higher than the lower limit temperature, and the plurality of product storage chambers including a product storage chamber switchable between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting annularly connected coolers with a pipe, a compressor operation control means for operating the compressor at a commanded operation frequency, and an operation rate of the compressor. Operating rate detecting means for detecting a temperature of the compressor, a product temperature detecting means provided for each of the plurality of product storage chambers, and a high operating frequency when the temperature detected by the product temperature detecting means is high. Finger on operation control means A cooling control unit that instructs the compressor operation control unit to operate at a low operation frequency when the temperature detected by the product temperature detection unit is low, and that keeps the compressor operation rate constant by the compressor operation ratio detection unit; The operating rate can be set as high as does not affect the cooling performance, the compressor's capacity is maximized against load fluctuations, and when the load is small, the compressor's operating frequency is lowered to save energy It has the effect of being able to.

Further, by reducing the frequency of the compressor, the life of the compressor can be improved by reducing the wear of the mechanical parts of the compressor.

According to a sixth aspect of the present invention, there is provided a compressor having a variable operating frequency, a condenser, and a plurality of commodity storage chambers, each of which is provided with a corresponding commodity storage chamber in a cooling mode at a temperature lower than a lower limit temperature. And a valve which closes in the heating mode and opens in the cooling mode when the temperature is higher than the lower limit temperature, and the plurality of product storage chambers including a product storage chamber switchable between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting annularly arranged coolers with a pipe, a compressor operation control means for operating the compressor at a commanded operating frequency, a heating mode and a cooling mode A cooler fan provided for each of the plurality of product storage rooms including a product storage room that can be switched to, an air volume control unit that varies an air volume of the cooler fan, and a product sales number counting unit, The cooling mode In accordance with the number of products sold per unit time in the certain product storage room, if the sales volume is high, a high operating frequency is instructed to the compressor operation control means, and the air volume control means is instructed to increase the air volume at the same time. If the amount is small, a low operation frequency is instructed to the compressor operation control means, and the air volume control means is simultaneously instructed to reduce the air volume, and the compressor operation rate detection means is used to keep the operation rate of the compressor constant. It is possible to control the load amount by the air volume control even when the sales amount is large, thereby achieving energy saving.

Also, by lowering the frequency of the compressor, the life of the compressor can be improved by reducing the wear of the mechanical parts of the compressor.

According to a seventh aspect of the present invention, there is provided a compressor having a variable operating frequency, a condenser, and a plurality of commodity storage chambers, each of which is provided with a corresponding commodity storage chamber at a cooling mode and lower than the lower limit temperature. And a valve which closes in the heating mode and opens in the cooling mode when the temperature is higher than the lower limit temperature, and the plurality of product storage chambers including a product storage chamber switchable between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting pipes to a cooler provided for each of the pipes, a compressor operation control means for operating the compressor at a commanded operating frequency, and a heating mode. Cooling mode or cooling mode
Mode switching detecting means for detecting switching from the heating mode to the heating mode, and a timer for detecting switching from the heating mode to the cooling mode by the mode switching detecting means and starting counting. Means for controlling the operation of the compressor when the switching from the warming mode to the cooling mode is detected by the mode switching detecting means. , The operation frequency of the compressor is increased for a certain period of time, and the compressor can be cooled quickly to the set temperature, so that there is no missing of a sales opportunity to the customer. In addition, by rapidly cooling, the operation time at a high operation frequency can be shortened, and the reliability is improved.

According to an eighth aspect of the present invention, there is provided a compressor having a variable operating frequency, a condenser, and a plurality of commodity storage chambers, each of which is provided with a corresponding commodity storage chamber in a cooling mode at a temperature lower than a lower limit temperature. And a valve which closes in the heating mode and opens in the cooling mode when the temperature is higher than the lower limit temperature, and the plurality of product storage chambers including a product storage chamber switchable between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting pipes to a cooler provided for each of the pipes, a compressor operation control means for operating the compressor at a commanded operating frequency, and a heating mode. Cooling mode or cooling mode
Mode switching detecting means for detecting switching from a heating mode to a heating mode, and a plurality of product storage rooms including a product storage room switchable between a heating mode and a cooling mode. When the switching from the heating mode to the cooling mode is detected by the commodity temperature detecting means and the mode switching detecting means, the operating frequency is increased until the temperature detected by the commodity temperature detecting means falls below a certain temperature. The cooling control means for instructing the compressor operation control means can quickly cool down to the set temperature, accurately determine the product temperature, reduce the opportunity at a high operation frequency, and save energy. Having.

According to a ninth aspect of the present invention, there is provided a compressor having a variable operation frequency, a condenser, and a plurality of product storage rooms, each of which is provided with a corresponding product storage room in a cooling mode and a temperature lower than a lower limit temperature. And a valve which closes in the heating mode and opens in the cooling mode when the temperature is higher than the lower limit temperature, and the plurality of product storage chambers including a product storage chamber switchable between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting annularly connected coolers with a pipe, a compressor operation control means for operating the compressor at a commanded operating frequency, and opening and closing of the product storage chamber A door opening / closing detecting means for detecting opening / closing of a door, a timer means for starting counting after the door is closed by the door opening / closing detecting means, a product sales number counting means, and a case where the sales volume is large by the product sales number counting means. By the timer means A certain period of time after the door is closed comprises cooling control means for commanding a high operation frequency to the compressor operation control means, and for a high load amount at the time of filling the product, the operation frequency of the compressor is raised for a certain time and set. It has the effect of being able to quickly cool down to the temperature and not missing out on sales opportunities to customers.

Further, opportunities at a high operating frequency are reduced, and energy saving and reliability improvement of the compressor can be achieved.

According to a tenth aspect of the present invention, there is provided a compressor having a variable operating frequency, a condenser, and a plurality of product storage rooms, each of which is provided with a corresponding product storage room in a cooling mode at a temperature lower than a lower limit temperature. And a valve which closes in the heating mode and opens in the cooling mode when the temperature is higher than the lower limit temperature, and the plurality of product storage chambers including a product storage chamber switchable between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting pipes to a cooler provided for each of the pipes, a compressor operation control means for operating the compressor at a commanded operating frequency, and the compressor or the condenser System temperature detecting means for detecting the temperature of the heater, temperature determining means set for each frequency to be compared with the temperature detected by the system temperature detecting means, and the temperature detected by the system temperature detecting means is used as the determination means. Abnormal temperature counting means for counting the number of times exceeding the temperature, display means for displaying a warning display, etc., and when the number of times counted by the abnormal temperature counting means reaches a certain value or more, a warning is displayed by the display means. The cooling control means has the effect that even if the operating frequency of the compressor is changed in response to a load change, a radiation abnormality due to clogging of the condenser can be detected and the reliability of the compressor can be ensured.

Further, it is possible to eliminate wasteful consumption of power caused by abnormal heat radiation due to clogging of the condenser.

According to an eleventh aspect of the present invention, in addition to the tenth aspect, an outside air temperature detecting means for detecting an outside air temperature of the vending machine, and a temperature of the judging means according to the detected outside air temperature. A correction unit that corrects the curve, an abnormal temperature counting unit that counts the number of times the temperature detected by the system temperature detection unit exceeds the temperature of the determination unit corrected by the correction unit, and a counting unit that counts the abnormal temperature. If the number of times the number of times reaches a certain value or more, the display control means comprises a cooling control means for displaying a warning by the display means. In addition to having the effect of being able to detect and secure the reliability of the compressor, when it is predicted that the outside air temperature is low and the load on the compressor is small, the heat radiation abnormality is corrected by correcting the determination means. It can be determined with a condenser of clogging prior to raw.

Further, it is possible to eliminate wasteful power consumption caused by abnormal heat radiation due to clogging of the condenser or the like.

[0057]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vending machine cooling device according to the present invention will be described below with reference to the drawings. In addition,
The same components as those in the related art are denoted by the same reference numerals, and detailed description is omitted.

(Embodiment 1) FIG. 1 is a refrigerant circuit diagram of a vending machine according to an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration of a control system of the cooling device of the vending machine of the embodiment. FIG. 3 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

In FIGS. 1, 2 and 3, 1A, 1B,
1C is a product storage room that is used for both the cooling mode and the heating mode. 4A is a compressor whose operating frequency is variable. 7A, 7
Reference numerals B and 7C denote expansion devices which are composed of solenoid valves 5A, 5B and 5C and capillary tubes 6A, 6B and 6C) and are provided for each of the plurality of product storage rooms and correspond to the corresponding product storage rooms 1A, 1B and 1C. Is closed in the cooling mode when the temperature is lower than the lower limit temperature or in the heating mode, and opens when the temperature is higher than the lower limit temperature in the cooling mode.

Reference numeral 8A denotes a pipe which forms a refrigerant circuit by connecting the coolers 2A, 2B, 2C provided for the product storage chambers 1A, 1B, 1C, respectively, in an annular manner in order.
The refrigerant and the lubricating oil for the compressor 4A flow through the pipe 8A.

Reference numeral 7 denotes a condenser, which is a compressor 4A and a throttle device 7A,
7B and 7C are connected with piping,
The cooler 2A is connected to the expansion device 7A, the cooler 2B is connected to the expansion device 7B, and the cooler 2C is connected to the expansion device 7C via the pipe 8A to form a refrigerant circuit.

The coolers 2A, 2B, 2C are respectively installed in the product storage rooms 1A, 1B, 1C. Three
A, 3B, and 3C are product storage rooms 1 in which the heating mode is selected.
This is a product heater for heating each of A, 1B, and 1C.

Reference numeral 14 denotes compressor operation control means for varying the operation frequency of the compressor 4A from RMIN to RMAX. 15A, 15B and 15C are cooler fans.

Reference numerals 16A, 16B and 16C denote product temperature detecting means for detecting the product temperature of the product storage chambers 1A, 1B and 1C, respectively, and are constituted by temperature detecting elements such as thermistors.

Reference numeral 17 denotes a cooling room number detecting means for detecting the number of the product storage rooms 1A, 1B, 1C which are being cooled by the coolers 2A, 2B, 2C. The cooling chamber number detecting means 1
Numeral 7 detects the open state of the solenoid valves 5A, 5B, 5C.

Reference numeral 18A denotes a control means which has an arithmetic processing section therein and which is provided with commodity temperature detecting means 16A, 16B, 16C.
The number of rooms is small according to the value of the product temperature detected by C and the number of product storage rooms 1A, 1B, and 1C that are being cooled by the coolers 2A, 2B, and 2C detected by the number-of-cooling-rooms detecting means 17. A lower operation frequency is commanded to the compressor operation control means 14.

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

Here, the commodity temperature of the commodity storage chambers 1A, 1B, 1C is detected, for example, at regular intervals so that the commodity temperature of the commodity storage chambers 1A, 1B, 1C is cooled within a predetermined temperature. When the temperature falls below the temperature, the expansion devices 7A, 7B, 7C are closed, and when all the expansion devices are closed, the compressor 4A is closed.
Is stopped, and when the temperature exceeds a predetermined temperature, the expansion devices 7A, 7B, 7
The compressor 4A is operated when C is opened and any one of the expansion devices is opened, and the operating frequency of the compressor 4A can be varied from RMIN to RMAX based on the operating state.

At STEP 11, the number of cooling chambers 1A, 1B, 1C which are being cooled by the coolers 2A, 2B, 2C is detected by the number of cooling chambers detecting means 17. STEP1
If the number of operations of the aperture devices 7A, 7B and 7C is 1 in 2 and ST
The process proceeds to EP13, where the cooling control unit 18A sets the operating frequency of the compressor 4A to R1 and outputs it to the compressor operation control unit 14, and the compressor operation control unit 14 sets the operating frequency of the compressor 4A to R1. Control.

In step 14, the diaphragm devices 7A, 7B,
If the number of operations of the compressor 7C is 2, the process proceeds to STEP 15, the cooling control unit 18A sets the operating frequency of the compressor 4A to R2 and outputs it to the compressor operation control unit 14, and the compressor operation control unit 14 sets the compressor 4A Is controlled to R2.

In step 14, the diaphragm devices 7A, 7B,
If the number of operations of 7C is 3, the process proceeds to STEP 16, the cooling control unit 18A sets the operating frequency of the compressor 4A to R3 and outputs it to the compressor operation control unit 14, and the compressor operation control unit 14 sets the compressor 4A Is controlled to R3.

Here, the magnitude of the set frequency is RMIN <R
1 <R2 <R3 <RMAX.

As described above, according to the cooling device for a vending machine of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the plurality of product storage chambers 1A, 1B, 1C are respectively provided. The squeezing devices 7A, 7B which are provided when the corresponding product storage rooms 1A, 1B, 1C are in the cooling mode and are lower than the lower limit temperature or in the heating mode and are closed when the cooling mode is higher than the lower limit temperature. , 7C, and coolers 2A, 2B, 2C provided for each of a plurality of product storage rooms 1A, 1B, 1C including product storage rooms 1A, 1B, 1C switchable between a heating mode and a cooling mode. A refrigerant circuit 8A configured by sequentially connecting pipes in a ring, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency,
Cooling room number detecting means 17 for detecting the number of the product storage rooms 1A, 1B, 1C which are being cooled by the coolers 2A, 2B, 2C, and chambers according to the number of rooms detected by the cooling room number detecting means 17. The cooling control means 18A instructs the compressor operation control means 14 to operate at a lower operating frequency as the number is smaller, and can be controlled by a load amount corresponding to the number of product storage rooms 1A, 1B, and 1C in the cooling mode. When it is small, the operating frequency of the compressor 4A can be lowered to save energy, and the life of the compressor 4A can be improved by lowering the frequency of the compressor 4A, such as reducing the wear of the mechanical parts of the compressor 4A.

Further, the influence on global warming is extremely small, and it can contribute to the improvement of the global environment.

In this embodiment, the open state of the solenoid valves 5A, 5B, 5C is detected by the number of cooling chambers detecting means 17, but the detection can be performed based on the product temperatures of the product storage rooms 1A, 1B, 1C.

(Embodiment 2) Next, a cooling device for a vending machine according to Embodiment 2 of the present invention will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 4 is a block diagram showing a configuration of a control system of the cooling device of the vending machine of the embodiment. FIG. 5 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

In FIGS. 4 and 5, reference numeral 19A denotes timer means for starting counting when the temperature detected by the commodity temperature detecting means 16 is higher than a predetermined temperature. Reference numeral 18B denotes a control means. When the commodity temperature detected by the commodity temperature detection means 16 is higher than a certain temperature, the compressor operation control means 14 is instructed to a low operation frequency until the value counted by the timer means 19A exceeds a certain time H1. I do.

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

Here, the commodity temperature of the commodity storage chambers 1A, 1B, 1C is detected, for example, at regular time intervals, so that the commodity temperature of the commodity storage chambers 1A, 1B, 1C is cooled within a predetermined temperature. When the temperature falls below the temperature, the expansion devices 7A, 7B, 7C are closed, and when all the expansion devices are closed, the compressor 4A is closed.
Is stopped, and when the temperature exceeds a predetermined temperature, the expansion devices 7A, 7B, 7
The compressor 4A is operated when C is opened and any one of the expansion devices is opened, and the operating frequency of the compressor 4A can be varied from RMIN to RMAX based on the operating state.

In STEP 21, the commodity temperature detecting means 16A,
Product temperature T2, T3, T4 of each storage room at 16B, 16C
Is detected. If T2 + T3 + T4 is larger than the set value T1 in STEP22, the process proceeds to STEP23.

At step 23, the counting by the timer means 19A is started (H), and at the same time, the cooling control means 18B sets the operating frequency of the compressor 4A to R4 and outputs it to the compressor operation control means 14, and outputs the same to the compressor operation control means 14. 14 controls the operating frequency of the compressor 4A to R4.

At STEP 24, when the measured value (H) of the timer means 19A exceeds the set value H1, the process proceeds to STEP 25, and when it falls below, the counting is continued.

In STEP 25, the cooling control means 18B sets the operating frequency of the compressor 4A to one of R1, R2, and R3 and outputs it to the compressor operation control means 14, and the compressor operation control means 14 controls the compressor 4A. To control the frequency during operation.

Here, the magnitude of the set frequency is RMIN <R
4 <R3 <RMAX.

As described above, according to the vending machine cooling apparatus of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the plurality of product storage chambers 1A, 1B, 1C are respectively provided. The squeezing devices 7A, 7B which are provided when the corresponding product storage rooms 1A, 1B, 1C are in the cooling mode and are lower than the lower limit temperature or in the heating mode and are closed when the cooling mode is higher than the lower limit temperature. , 7C, and coolers 2A, 2B, 2C provided for each of a plurality of product storage rooms 1A, 1B, 1C including product storage rooms 1A, 1B, 1C switchable between a heating mode and a cooling mode. A refrigerant circuit 8A configured by sequentially connecting pipes in a ring, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency,
When the temperature detected by the product temperature detecting means 16 is higher than a certain temperature, the timer means 19A starts counting, and when the product temperature detected by the product temperature detecting means 16 is higher than the certain temperature, the value counted by the timer means 19A is constant. Time H1
Operating frequency until compressor operation control means 14
When the load amount of the product storage chambers 1A, 1B, and 1C in the cooling mode is extremely large, the operation frequency of the compressor 4A is reduced for a certain period of time to reduce the load on the compressor 4A. The load is increased and cooling can be performed without operating the protection device, and the reliability of the compressor 4A is improved.

In addition, energy can be saved by lowering the operating frequency of the compressor 4A, and the life of the compressor 4A can be reduced by lowering the frequency of the compressor 4A only when the load is high, such as reducing the wear of the mechanical part of the compressor 4A. Improvement can be realized.

Embodiment 3 Next, a cooling device for a vending machine according to Embodiment 3 of the present invention will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 6 is a block diagram showing a configuration of a control system of the cooling device of the vending machine of the embodiment. FIG. 7 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

6 and 7, reference numeral 20A denotes a compressor 4
A or a system temperature detecting means for detecting the temperature of the condenser 9. Reference numeral 18C denotes a control unit that detects the temperatures T2, T detected by the commodity temperature detection units 16A, 16B, 16C.
If the sum of T3 and T4 is higher than the set temperature T1, a low operation frequency is commanded to the compressor operation control means 14, and if the temperature detected by the system temperature detection means 20A falls below the set temperature T5, the high operation frequency is set to the compressor. It commands the operation control means 14.

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

Here, the commodity temperature in the commodity storage chambers 1A, 1B, 1C is detected, for example, at regular intervals so that the commodity temperature in the commodity storage chambers 1A, 1B, 1C is cooled within a predetermined temperature. When the temperature falls below the temperature, the expansion devices 7A, 7B, 7C are closed, and when all the expansion devices are closed, the compressor 4A is closed.
Is stopped, and when the temperature exceeds a predetermined temperature, the expansion devices 7A, 7B, 7
The compressor 4A is operated when C is opened and any one of the expansion devices is opened, and the operating frequency of the compressor 4A can be varied from RMIN to RMAX based on the operating state.

At STEP 31, the commodity temperature detecting means 16A,
Product temperature T2, T3, T4 of each storage room at 16B, 16C
Is detected. When T2 + T3 + T4 is larger than the set value T1 in STEP32, the process proceeds to STEP33.

In STEP 33, the cooling control means 18C sets the operating frequency of the compressor 4A to R4 and outputs it to the compressor operation control means 14, and the compressor operation control means 14
Is controlled to R4.

Step 34 is the system temperature detecting means 20.
When the temperature (T) detected in A is lower than the set temperature T5, the process proceeds to STEP35.

In STEP 35, the cooling control means 18C sets the operating frequency of the compressor 4A to one of R1, R2, and R3 and outputs it to the compressor operation control means 14, and the compressor operation control means 14 controls the compressor 4A. To control the frequency during operation.

Here, the magnitude of the set frequency is RMIN <R
4 <R3 <RMAX.

As described above, according to the vending machine cooling apparatus of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the plurality of product storage chambers 1A, 1B, 1C are respectively provided. The squeezing devices 7A, 7B which are provided when the corresponding product storage rooms 1A, 1B, 1C are in the cooling mode and are lower than the lower limit temperature or in the heating mode and are closed when the cooling mode is higher than the lower limit temperature. , 7C, and coolers 2A, 2B, 2C provided for each of a plurality of product storage rooms 1A, 1B, 1C including product storage rooms 1A, 1B, 1C switchable between a heating mode and a cooling mode. A refrigerant circuit 8A configured by sequentially connecting pipes in a ring, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency,
Commodity temperature detecting means 16A, 16B, 16C and compressor 4
A or a system temperature detecting means 20A for detecting the temperature of the condenser 9 and product temperature detecting means 16A, 16B, 16C
When the sum of the temperatures T2, T3 and T4 detected by the above is higher than the set temperature T1, a low operation frequency is instructed to the compressor operation control means 14, and when the temperature detected by the system temperature detection means 20A falls below the set temperature T5, Cooling control means 18C for instructing high operation frequency to compressor operation control means 14
The time when the load exceeds the limit can be accurately estimated, and the influence on the cooling performance can be minimized without lowering the reliability of the compressor 4A.

Further, since the operating frequency of the compressor 4A is reduced, energy can be saved.

(Embodiment 4) Next, a cooling device for a vending machine according to Embodiment 4 of the present invention will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 8 is a block diagram showing the configuration of the control system of the cooling device of the vending machine of the embodiment. FIG. 9 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

8 and 9, reference numeral 21 denotes a compressor operation detecting means for detecting the operation of the compressor 4A. Reference numeral 19B denotes timer means for starting counting when the compressor 4A starts operating by the compressor operation detecting means 21.

Reference numeral 18D denotes a control means. When the count (H) of the timer means 19B, which has started counting in response to a signal from the compressor operation detecting means 21, exceeds a set value H2, a high operating frequency is set. Command means 14.

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

Here, the commodity temperature of the commodity storage chambers 1A, 1B, 1C is detected, for example, at regular intervals so that the commodity temperature of the commodity storage chambers 1A, 1B, 1C is cooled within a predetermined temperature. When the temperature falls below a predetermined temperature, the expansion devices 7A, 7A
The compressor 4A is stopped when B and 7C are closed and all the expansion devices are closed.
A, 7B, and 7C are opened, and the compressor 4A is operated when any one of the expansion devices is opened. The operating frequency of the compressor 4A is changed from RMIN to RM based on the operating state.
It can be varied up to AX.

When the operation of the compressor 4A is detected by the compressor operation detecting means 21 in STEP41, the process proceeds to STEP42. At STEP 42, counting by the timer means 19B is started. In step 43, the count (H) of the timer means 19B
Shifts to STEP44 when exceeds the set value H2.

In STEP 44, the cooling control means 18D sets the operating frequency of the compressor 4A to R5 and outputs it to the compressor operation control means 14, and the compressor operation control means 14
Is controlled to R5.

Here, the magnitude of the set frequency is RMIN <R
1 <R2 <R3 <R5 <RMAX.

As described above, according to the cooling device for a vending machine of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the plurality of product storage chambers 1A, 1B, 1C are respectively provided. The squeezing devices 7A, 7B which are provided when the corresponding product storage rooms 1A, 1B, 1C are in the cooling mode and are lower than the lower limit temperature or in the heating mode and are closed when the cooling mode is higher than the lower limit temperature. , 7C, and coolers 2A, 2B, 2C provided for each of a plurality of product storage rooms 1A, 1B, 1C including product storage rooms 1A, 1B, 1C switchable between a heating mode and a cooling mode. A refrigerant circuit 8A configured by sequentially connecting pipes in a ring, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency,
Commodity temperature detecting means 16A, 16B, 16C and compressor 4
A compressor operation detecting means 21 for detecting the operation of A, timer means 19B for starting counting when the compressor 4A starts operating by the compressor operation detecting means 21, and counting by a signal from the compressor operation detecting means 21 Timer means 19B
Control means 1 instructing compressor operation control means 14 to operate at a high operation frequency when count (H) exceeds a set value H2.
8D, the operating rate of the compressor 4A exceeds 100% due to changes in the environment, clogging of the condenser 9 and the like, and the cooling performance cannot be maintained.

(Embodiment 5) Hereinafter, an embodiment of a cooling control device for a vending machine according to the present invention will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 10 is a block diagram showing a configuration of a control system of the cooling device of the vending machine of the embodiment. FIG. 11 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

10 and 11, reference numeral 22 denotes a compressor 4
This is a compressor operation rate detecting means for detecting the operation rate of A (operation time / operation time + stop time). Reference numeral 18E denotes a control unit which has an arithmetic processing unit therein and has a high compressor temperature 4 detected by the commodity temperature detection units 16A, 16B, 16C.
If the operation rate of A is high, a high operation frequency is instructed to the compressor operation control means 14, and if the operation rate of the compressor 4A whose temperature detected by the commodity temperature detection means is low is low, the low operation frequency is set to the compressor operation control means 14. To the compressor operation control means 1
At 4, the operation rate of the compressor 4A is made constant.

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

Here, the commodity temperature of the commodity storage chambers 1A, 1B, 1C is detected, for example, at regular intervals so that the commodity temperature of the commodity storage chambers 1A, 1B, 1C is cooled within a predetermined temperature. When the temperature falls below a predetermined temperature, the expansion devices 7A, 7B, 7
C is closed and the compressor 4A is stopped when all the expansion devices are closed, and when the temperature exceeds a predetermined temperature, the expansion devices 7A and 7A are stopped.
It is assumed that the compressor 4A is operated when B and 7C are opened and one of the expansion devices is opened, and the operating frequency of the compressor 4A can be varied from RMIN to RMAX based on the operating state.

At step 51, the compressor operating rate detecting means 22
Detects the operation rate (P) of the compressor 4A. STEP52
If the operation rate (P) is larger than the set value P1,
At 53, the cooling control unit 18E sets the operating frequency of the compressor 4A to R6 and outputs it to the compressor operation control unit 14, and the compressor operation control unit 14 sets the operating frequency of the compressor 4A to R6.
6, the cooling control means 18E sets the operating frequency of the compressor 4A to R7 and outputs it to the compressor operation control means 14 in STEP 54, and the compressor operation control means 14 The operating frequency of 4A is controlled to R7.

Here, the magnitude of the set frequency is RMIN <R
6 <R7 <RMAX.

As described above, according to the cooling device for a vending machine of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the plurality of product storage rooms 1A, 1B, 1C are respectively provided. The squeezing devices 7A, 7B which are provided when the corresponding product storage rooms 1A, 1B, 1C are in the cooling mode and are lower than the lower limit temperature or in the heating mode and are closed when the cooling mode is higher than the lower limit temperature. , 7C, and coolers 2A, 2B, 2C provided for each of a plurality of product storage rooms 1A, 1B, 1C including product storage rooms 1A, 1B, 1C switchable between a heating mode and a cooling mode. A refrigerant circuit 8A configured by sequentially connecting pipes in a ring, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency,
Commodity temperature detecting means 16A, 16B, 16C and compressor 4
A compressor operation rate detection means 22 for detecting the operation rate of the compressor A, and the compressor operation control means 14 which, when the operation rate of the compressor 4A having a high temperature detected by the commodity temperature detection means 16A, 16B and 16C is high, increases the operation frequency. When the operation rate of the compressor 4A whose temperature detected by the commodity temperature detection means is low is low, a low operation frequency is instructed to the compressor operation control means 14, and the operation of the compressor 4A is operated by the compressor operation rate detection means 22. A cooling control means 18E for keeping the cooling rate constant, the operating rate can be set as high as does not affect the cooling performance, the capacity of the compressor 4A is maximized with respect to the load fluctuation, and the load amount is small. Can lower the operating frequency of the compressor 4A to save energy.

Further, by lowering the frequency of the compressor 4A, the life of the compressor 4A can be improved, such as by reducing the wear of the mechanical parts.

(Embodiment 6) Hereinafter, an embodiment of a cooling control device for a vending machine according to the present invention will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 12 is a block diagram showing a configuration of a control system of the cooling device of the vending machine of the embodiment. FIG. 13 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

In FIGS. 12 and 13, reference numeral 23 denotes a cooler fan speed control means for individually and steplessly controlling the speed of the cooler fans 15A, 15B and 15C. Numeral 24A is a sales number counting means, which counts the number of sales and the number of sales per unit time of the goods stored in the goods storage rooms 1A, 1B, 1C by a signal from a sales button (not shown) or the like, and sends it to the control means. The number of sales per unit time (N) is output.

Reference numeral 18F denotes a control means, which has an arithmetic processing section therein and which is in the cooling mode, in which the product storage chambers 1A, 1A are provided.
In accordance with the number of products sold per unit time in B and 1C, when the sales volume is large, a high operation frequency is instructed to the compressor operation control means 14 and at the same time the cooler fan speed control means 23 is instructed to increase the air volume. When the sales volume is small, a low operation frequency is instructed to the compressor operation control means 14 and at the same time, the cooler fan speed control means 23 is controlled to reduce the air volume.
And the operation rate of the compressor 4A is made constant by the compressor operation rate detection means 22.

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

Here, a case where only the product storage room 1A is in the cooling mode will be described.

Here, the commodity temperature in the commodity storage room 1A is detected, for example, at regular intervals so that the commodity temperature in the commodity storage chamber 1A is cooled to within a predetermined temperature. Is closed and the compressor 4A is stopped. When the temperature exceeds a predetermined temperature, the expansion device 7A is opened and the compressor 4A is operated.
The operating frequency of A can be varied from RMIN to RMAX.

The rotation speed of the cooler fan 15A is changed from FMIN to FMA by the cooler fan speed control means 23.
It can be varied up to X.

If the number of articles sold per unit time (N) of the article storage room 1A counted by the number-of-sales counting means 24A in STEP 61 is larger than the set value N1, the process proceeds to STEP 62, and the cooling control means 18F operates the compressor 4A. Frequency is R
8 and outputs it to the compressor operation control means 14. The compressor operation control means 14 sets the operating frequency of the compressor 4A to R8.
And the cooling fan speed control means 23 controls the rotation speed of the cooling fan 15A to F1.

If the value is smaller than the set value N1, the flow shifts to STEP 63, where the cooling control means 18F sets the operating frequency of the compressor 4A to R9 and outputs it to the compressor operation control means 14, and the compressor operation control means 14 The operating frequency of the 4A is controlled to R9 and the cooling fan speed control means 2
3 controls the rotation speed of the cooler fan 15A to F2.

Here, the magnitude of the set frequency is RMIN <R
9 <R8 <RMAX, FMIN <F1 <F2 <FMAX
Is in a relationship.

As described above, according to the vending machine cooling apparatus of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the product storage room 1 provided for the product storage room 1A are provided.
When A is in cooling mode and is below the lower limit temperature or in heating mode
The expansion device 7A is provided for a plurality of product storage rooms 1A including a expansion device 7A which is closed in the cooling mode and opened in the cooling mode when the temperature is higher than the lower limit temperature, and a product storage room 1A which can be switched between the heating mode and the cooling mode. Refrigerant circuit 8A, which is formed by sequentially connecting a plurality of coolers 2A in a ring shape, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency, a cooler fan 15A, and a product temperature detection. Means 16A, compressor operating rate detecting means 22 for detecting an operating rate of the compressor 4A,
Cooling fan rotation speed control means 23 for individually and continuously controlling the rotation speed of the cooling fan 15A;
The number of products sold in A, 1B, and 1C and the number of sales per unit time are counted by a signal from a sales button (not shown) or the like, and the number of sales (N) per unit time is output to the control means. The sales number counting unit 24A has an arithmetic processing unit therein, and has a value of the product temperature detected by the product temperature detection unit 16A and a value of the product sales number counted by the sales number counting unit 24A and a set value. The cooling control unit 18F performs a comparison, outputs a command to change the frequency to the compressor operation control unit 14, and outputs a command to change the rotation speed to the cooler fan rotation speed control unit 23 according to the comparison result. The load amount can be controlled by the air volume control even when the sales volume is large, and energy can be saved.

Further, by lowering the frequency of the compressor 4A, the life of the compressor 4A can be improved, such as by reducing the wear of the mechanical parts.

(Embodiment 7) Next, a cooling device for a vending machine according to Embodiment 7 of the present invention will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 14 is a block diagram showing the configuration of the control system of the cooling device of the vending machine of the embodiment. FIG. 15 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

In FIG. 14 and FIG. 15, reference numeral 25 denotes the setting of the product storage chambers 1A, 1B, 1C from the heating mode to the cooling mode.
Mode switching detecting means for detecting switching from the cooling mode or the heating mode to the heating mode. Reference numeral 19C denotes timer means for detecting switching from the heating mode to the cooling mode by the mode switching detecting means 25 and starting counting.

Reference numeral 18G denotes a control means, which has an arithmetic processing unit therein.
Timer means 1 when switching from cooling mode to cooling mode is detected
A high operation frequency is instructed to the compressor operation control means 14 until the numerical value (H) counted in 9C exceeds the predetermined time H3.

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

Here, a case where only the product storage room 1A is in the heating mode will be described. Here, the temperature of the product in the product storage room 1A is detected, for example, at regular intervals so that the product temperature in the product storage room 1A is cooled to within a predetermined temperature, and when the temperature falls below the predetermined temperature, the expansion device 7A is closed. With compressor 4
A is stopped, and when the temperature exceeds a predetermined temperature, the expansion device 7A is opened and the compressor 4A is operated. Based on the operation state, the operation frequency of the compressor 4A is changed from RMIN to RMAX.
It can be changed up to.

At STEP 71, the mode switching detecting means 25 returns to the start if the heating mode is maintained, and shifts to STEP 72 if the cooling mode is switched. At STEP 72, the counting by the timer 19C is started, the cooling control 18G sets the operating frequency of the compressor 4A to R10 and outputs the same to the compressor operation control 14, and the compressor operation control 14 operates the compressor 4A. The middle frequency is controlled to R10.

If the count (H) of the timer means is equal to or less than the set value H3 in STEP 73, the flow returns to STEP 73, and if the count (H) of the timer means exceeds the set value H3, the flow shifts to STEP 74.

In STEP 74, the operation frequency of the compressor 4A is set to one of R1, R2, and R3 by the cooling control means 18G and output to the compressor operation control means 14, and the compressor operation control means 14 Controls the frequency during operation.

Here, the magnitude of the set frequency is RMIN <R
1 <R2 <R3 <R10 <RMAX.

As described above, according to the vending machine cooling apparatus of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the product storage room 1 provided for the product storage room 1A are provided.
When A is in cooling mode and is below the lower limit temperature or in heating mode
The expansion device 7A is provided for a plurality of product storage rooms 1A including a expansion device 7A which is closed in the cooling mode and opened in the cooling mode when the temperature is higher than the lower limit temperature, and a product storage room 1A which can be switched between the heating mode and the cooling mode. Refrigerant circuit 8A, which is formed by sequentially connecting a plurality of coolers 2A in a ring shape, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency, a cooler fan 15A, and a product temperature detection. The means 16A and the product storage room 1A are moved from the heating mode to the cooling mode or the cooling mode.
Mode switching detecting means 25 for detecting switching from the mode to the heating mode, and the heating mode by the mode switching detecting means 25.
Timer means 19C for detecting switching from the heating mode to the cooling mode and starting counting, and a numerical value counted by the timer means 19C when the switching from the heating mode to the cooling mode is detected by the mode switching detecting means 25. Control means for commanding a high operation frequency to the compressor operation control means 14 until (H) exceeds a certain time H3, the operation frequency of the compressor 4A can be raised for a certain time, and the compressor 4A can be quickly cooled to a set temperature; You won't miss out on sales opportunities to customers.

Further, by rapidly cooling, the operation time at a high operation frequency can be shortened, and the reliability is improved.

Embodiment 8 Next, a cooling device for a vending machine according to Embodiment 8 of the present invention will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 16 is a block diagram showing the configuration of the control system of the cooling device of the vending machine of the embodiment. FIG. 17 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

In FIGS. 16 and 17, reference numeral 18H denotes a control means which has an arithmetic processing unit therein, and which is provided when the mode switching detecting means 25 detects a switch from the heating mode to the cooling mode. Temperature detecting means 16A, 16B, 16C
Command the compressor operation control means 14 to operate at a high operation frequency until the temperature detected in step (1) falls below a certain temperature.

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

Here, a case where only the product storage room 1A is in the heating mode will be described.

Here, the temperature of the product in the product storage room 1A is detected, for example, at regular intervals so that the product temperature in the product storage room 1A is kept within a predetermined temperature. Is closed, the compressor 4A is stopped. When the temperature exceeds a predetermined temperature, the expansion device 7A is opened and the compressor 4A is opened.
A and the compressor 4A based on the operating state.
Is variable from RMIN to RMAX.

In step 81, the mode switching detecting means 25 returns to the start if the heating mode is maintained, and shifts to step 82 if the cooling mode is switched. In STEP 82, the cooling control unit 18H sets the operating frequency of the compressor 4A to R10 and outputs it to the compressor operation control unit 14, and the compressor operation control unit 14 controls the operating frequency of the compressor 4A to R10.

At STEP 83, the product temperature (T) of the product storage room 1A is detected. If the product temperature (T) detected in STEP 84 is equal to or higher than the set temperature T6, the process returns to STEP 82, and if the product temperature (T) falls below the set temperature T6, ST
The process proceeds to EP85.

In STEP 85, the operation frequency of the compressor 4A is set to one of R1, R2 and R3 by the cooling control means 18H and output to the compressor operation control means 14, and the compressor operation control means 14 controls the operation of the compressor 4A. Controls the frequency during operation.

Here, the magnitude of the set frequency is RMIN <R
1 <R2 <R3 <R10 <RMAX.

As described above, according to the cooling device for a vending machine of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the product storage room 1 provided for the product storage room 1A.
When A is in cooling mode and is below the lower limit temperature or in heating mode
The expansion device 7A is provided for a plurality of product storage rooms 1A including a expansion device 7A which is closed in the cooling mode and opened in the cooling mode when the temperature is higher than the lower limit temperature, and a product storage room 1A which can be switched between the heating mode and the cooling mode. Refrigerant circuit 8A, which is formed by sequentially connecting a plurality of coolers 2A in a ring shape, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency, a cooler fan 15A, and a product temperature detection. The means 16A and the product storage room 1A are moved from the heating mode to the cooling mode or the cooling mode.
Mode switching detecting means 25 for detecting switching from the mode to the heating mode, and the heating mode by the mode switching detecting means 25.
And a cooling control means 18H for instructing the compressor operation control means 14 a high operating frequency until the temperature detected by the commodity temperature detecting means 16A falls below a certain temperature when the switching from the cooling mode to the cooling mode is detected. In addition to being able to quickly cool down to the temperature, the product temperature can be accurately determined, so that opportunities at a high operation frequency are reduced, and energy can be saved.

Embodiment 9 Next, a cooling device for a vending machine according to Embodiment 9 of the present invention will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 18 is a block diagram showing a configuration of a control system of the cooling device of the vending machine of the embodiment. FIG. 19 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

In FIGS. 18 and 19, reference numeral 26 denotes door open / close detecting means for detecting the open / close of the open / close doors of the goods storage rooms 1A, 1B, 1C. Reference numeral 19D denotes timer means for starting counting after the door is closed by the door open / close detecting means 26. Reference numeral 24B denotes sales number counting means for counting the sales number of the goods stored in the goods storage rooms 1A, 1B, 1C by a signal from a sales button (not shown) or the like, and outputting the sales number (N) to the control means. I do.

Reference numeral 18J denotes control means, which receives a signal from the product sales number counting means 24B and stores the product storage rooms 1A, 1B, 1C.
The number of articles stored in the compressor is counted, and if the sales volume is large, the timer means 19D instructs the compressor operation control means 14 to operate at a high operating frequency for a certain period of time after the door is closed.

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

Here, the commodity temperature in the commodity storage rooms 1A, 1B, 1C is detected, for example, at regular intervals so that the commodity temperature in the commodity storage chambers 1A, 1B, 1C is cooled within a predetermined temperature. When the temperature falls below the temperature, the expansion devices 7A, 7B, 7C are closed, and when all the expansion devices are closed, the compressor 4A is closed.
Is stopped, and when the temperature exceeds a predetermined temperature, the expansion devices 7A, 7B, 7
The compressor 4A is operated when C is opened and any one of the expansion devices is opened, and the operating frequency of the compressor 4A can be varied from RMIN to RMAX based on the operating state.

In STEP 91, the opening / closing of the open / close door is detected by the door open / close detecting means 26. If there is no open / close, the process returns to the start. If open / close is detected, the process proceeds to STEP 92. STEP9
In step 2, the sales quantity counting means 24B detects the sales amount (N) and estimates the product filling amount.

In step 93, the sales amount (N) is set to the set value N2.
Is exceeded, the process proceeds to STEP 94, in which the cooling control unit 18J sets the operating frequency of the compressor 4A to R11 and outputs it to the compressor operation control unit 14, and the compressor operation control unit 14 operates during the operation of the compressor 4A. Is controlled to R11 and the counting by the timer means 19D is started.

At step 93, the sales amount (N) is set to the set value N2.
If not, the process proceeds to STEP 95, where the cooling control unit 18J sets the operating frequency of the compressor 4A to R12.
Is output to the compressor operation control means 14, and the compressor operation control means 14 sets the operating frequency of the compressor 4A to R12.
And the counting by the timer means 19D is started.

If the count value (T) of the timer means 19D is equal to or less than T7 in STEP96, the process returns to STEP96, and if it exceeds T7, the process proceeds to STEP97. In step 97, the operation frequency of the compressor 4A is set to R1, R
2 and R3 to set the compressor operation control means 14
And the compressor operation control means 14 controls the frequency during operation of the compressor 4A.

Here, the magnitude of the set frequency is RMIN <R
1 <R2 <R3 <R11 <R12 <RMAX.

As described above, according to the vending machine cooling apparatus of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the plurality of product storage chambers 1A, 1B, 1C are respectively provided. The squeezing devices 7A, 7B which are provided when the corresponding product storage rooms 1A, 1B, 1C are in the cooling mode and are lower than the lower limit temperature or in the heating mode and are closed when the cooling mode is higher than the lower limit temperature. , 7C, and coolers 2A, 2B, 2C provided for each of a plurality of product storage rooms 1A, 1B, 1C including product storage rooms 1A, 1B, 1C switchable between a heating mode and a cooling mode. A refrigerant circuit 8A configured by sequentially connecting pipes in a ring, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency,
Commodity temperature detecting means 16A, 16B, 16C, door opening / closing detecting means 26 for detecting the opening / closing of the opening / closing door of the article storage chambers 1A, 1B, 1C, and a timer for starting counting after the opening / closing door is closed by the door opening / closing detecting means 26 Means 19D, the goods storage room 1A,
Sales number counting means 24B which counts the sales number of the goods stored in 1B and 1C by a signal from a sales button (not shown) and outputs the sales number (N) to the control means, and goods sales number counting means 24B Receiving the signal from the product storage room 1A, 1B,
A cooling control means 18J for controlling the compressor 4A to increase the operating frequency for a certain period of time (T7) after the door is closed according to the number of stored products in the 1C, according to the number of stored products. For a high load amount, the operating frequency of the compressor 4A is increased for a certain period of time, and the compressor 4A can be cooled quickly to the set temperature, so that a sales opportunity to the customer is not missed.

Further, opportunities at a high operation frequency are reduced, and energy saving and improvement in reliability of the compressor 4A can be achieved.

(Embodiment 10) Next, Embodiment 10 of the present invention will be described.
The cooling device of the vending machine will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 20 is a block diagram showing a configuration of a control system of the cooling device of the vending machine of the embodiment. FIG. 21 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

20 and 21, reference numeral 20B denotes a system temperature detecting means for detecting the temperature of the compressor 4A or the condenser 9. Reference numeral 27 denotes a determination unit which is a temperature at which a heat release abnormality is set for each operating frequency of the compressor 4A, which is compared with the temperature detected by the system temperature detection unit 20B.

Reference numeral 28 denotes an abnormal temperature counting means for counting the number of times the temperature detected by the system temperature detecting means 20B exceeds the temperature of the judging means 27. Reference numeral 29 denotes display means for displaying a warning or the like.

Reference numeral 18K denotes control means, and when the number of times (X) counted by the abnormal temperature counting means 28 exceeds the set value X1, a warning is displayed on the display means 29.

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

Here, the commodity temperature in the commodity storage chambers 1A, 1B, 1C is detected, for example, at regular intervals so that the commodity temperature in the commodity storage chambers 1A, 1B, 1C is kept within a predetermined temperature. When the temperature falls below the temperature, the expansion devices 7A, 7B, 7C are closed, and when all the expansion devices are closed, the compressor 4A is closed.
Is stopped, and when the temperature exceeds a predetermined temperature, the expansion devices 7A, 7B, 7
The compressor 4A is operated when C is opened and any one of the expansion devices is opened, and the operating frequency of the compressor 4A can be varied from RMIN to RMAX based on the operating state.

In STEP 101, the setting temperature T8 at which the radiation is abnormal is set by the determining means 27 for each operating frequency of the compressor 4A. In step 102, the system temperature detecting means 20
B detects the temperature (T) immediately before the stop of the compressor 4A. If the temperature (T) immediately before the stop is equal to or lower than the set temperature T8 in STEP 103, the process returns to STEP 101, and if the temperature (T) immediately before the stop exceeds the set temperature T8, STEP 104
Move to.

At STEP 104, 1 is added to the count (X) of the abnormal temperature counting means 28. If the count (X) of the abnormal temperature counting means 28 is equal to or less than the set value X1 in STEP 105,
Returning to STEP 101, when the count (X) of the abnormal temperature counting means 28 exceeds the set value X1, the process proceeds to STEP 106, and a warning is displayed on the display means 29.

As described above, according to the vending machine cooling apparatus of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the plurality of product storage chambers 1A, 1B, 1C are respectively provided. The squeezing devices 7A, 7B which are provided when the corresponding product storage rooms 1A, 1B, 1C are in the cooling mode and are lower than the lower limit temperature or in the heating mode and are closed when the cooling mode is higher than the lower limit temperature. , 7C, and coolers 2A, 2B, 2C provided for each of a plurality of product storage rooms 1A, 1B, 1C including product storage rooms 1A, 1B, 1C switchable between a heating mode and a cooling mode. A refrigerant circuit 8A configured by sequentially connecting pipes in a ring, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency,
Commodity temperature detecting means 16A, 16B, 16C and compressor 4
A or a system temperature detecting means 20B for detecting the temperature of the condenser 11, a determining means 27 for setting a temperature at which the heat radiation is abnormal for each operating frequency of the compressor 4A, and a determining means for determining the temperature detected by the system temperature detecting means 20B. 27, an abnormal temperature counting means 28 for counting the number of times exceeding the temperature, a display means 29 for displaying a warning or the like, and a display means when the number of times (X) counted by the abnormal temperature counting means 28 exceeds the set value X1. 29
And a cooling control means 18K for displaying a warning, whereby even if the operating frequency of the compressor 4A fluctuates with respect to load fluctuations, it is possible to detect a radiation abnormality due to clogging of the condenser 9 or the like,
The reliability of the compressor 4A can be ensured.

In addition, wasteful consumption of electric power caused by abnormal heat radiation due to clogging of the condenser 9 can be eliminated.

(Embodiment 11) Next, Embodiment 11 of the present invention will be described.
The cooling device of the vending machine will be described with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 22 is a block diagram showing a configuration of a control system of the cooling device of the vending machine of the embodiment. FIG. 23 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

In FIGS. 22 and 23, reference numeral 30 denotes an outside air temperature detecting means for detecting the outside air temperature. Reference numeral 18L denotes a control unit, which has a correction unit for correcting the temperature of the determination unit 27 based on the temperature (T ') detected by the outside air temperature detection unit 30, and sets the number of times (X) counted by the abnormal temperature counting unit 28 to a set value. When X1 is exceeded, a warning is displayed by the display unit 29.

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

Here, the commodity temperature in the commodity storage chambers 1A, 1B, 1C is detected, for example, at regular intervals so that the commodity temperature in the commodity storage chambers 1A, 1B, 1C is kept within a predetermined temperature. When the temperature falls below the temperature, the expansion devices 7A, 7B, 7C are closed, and when all the expansion devices are closed, the compressor 4A is closed.
Is stopped, and when the temperature exceeds a predetermined temperature, the expansion devices 7A, 7B, 7
The compressor 4A is operated when C is opened and any one of the expansion devices is opened, and the operating frequency of the compressor 4A can be varied from RMIN to RMAX based on the operating state.

At STEP 111, the outside air temperature (T ') is detected by the outside air temperature detecting means 30, and the system temperature detecting means 2
The temperature (T) immediately before the stop of the compressor 4A is detected by 0B. In step 112, the outside air temperature (T ') is set to the set temperature T9.
If the temperature exceeds the set temperature T9, the process proceeds to STEP 113, where the temperature t1 is set as the set temperature T10 to be compared with the temperature (T) immediately before the stop.
The process proceeds to EP114 and sets the temperature t2 to the set temperature T10 to be compared with the temperature (T) immediately before the stop.

If the temperature (T) immediately before the stop is equal to or lower than the set temperature T10 in STEP 115, the process returns to STEP 111. If the temperature (T) immediately before the stop exceeds the set temperature T10,
Move to TEP116.

At STEP 116, 1 is added to the count (X) of the abnormal temperature counting means 28. If the count (X) of the abnormal temperature counting means 28 is equal to or smaller than the set value X1 in step 117,
Returning to STEP 111, when the count (X) of the abnormal temperature counting means 28 exceeds the set value X1, the processing shifts to STEP 118, and a warning is displayed on the display means 29. Here, the relationship between the set temperature to be compared with the temperature (T) immediately before the stop is t1>
t2.

As described above, according to the cooling device for a vending machine of the present embodiment, the compressor 4A having a variable operating frequency, the condenser 9, and the plurality of product storage chambers 1A, 1B, 1C are respectively provided. The squeezing devices 7A, 7B which are provided when the corresponding product storage rooms 1A, 1B, 1C are in the cooling mode and are lower than the lower limit temperature or in the heating mode and are closed when the cooling mode is higher than the lower limit temperature. , 7C, and coolers 2A, 2B, 2C provided for each of a plurality of product storage rooms 1A, 1B, 1C including product storage rooms 1A, 1B, 1C switchable between a heating mode and a cooling mode. A refrigerant circuit 8A configured by sequentially connecting pipes in a ring, a compressor operation control means 14 for operating the compressor 4A at a commanded operating frequency,
Commodity temperature detecting means 16A, 16B, 16C and compressor 4
A, a system temperature detecting means 20B for detecting the temperature of the condenser 9, a judging means 27 for setting a temperature at which the heat radiation is abnormal for each operating frequency of the compressor 4A, and a judging means for detecting the temperature detected by the system temperature detecting means 20B. 27, an abnormal temperature counting means 28 for counting the number of times exceeding the temperature of 27, a display means 29 for displaying a warning or the like, an outside air temperature detecting means 30 for detecting the outside air temperature, and a temperature detected by the outside air temperature detecting means 30 (T '), The cooling control means 18L for displaying a warning on the display means 29 when the number (X) counted by the abnormal temperature counting means 28 exceeds the set value X1. Even if the operating frequency of the compressor 4A is changed in response to a load change, a radiation abnormality due to clogging of the condenser 9 or the like can be detected, and the reliability of the compressor 4A can be ensured. Moni, when the outside air temperature is predicted to be less load of the compressor 4A low, by correcting the determination unit 27 can determine clogging of the condenser 9 before heat dissipation abnormality occurs.

Further, it is possible to eliminate wasteful consumption of electric power caused by abnormal heat radiation due to clogging of the condenser 9 or the like.

Further, by combining the first embodiment, the second embodiment or the third embodiment, the fourth embodiment, and the tenth or the eleventh embodiment, wasteful consumption can be further reduced and energy can be saved. The reliability is also greatly improved.

Further, Embodiment 1, Embodiment 2 or Embodiment 3, Embodiment 4, Embodiment 5 or Embodiment 6, Embodiment 7 or Embodiment 8, Embodiment 9 and Embodiment 11 The operation can be performed most efficiently, and the energy saving and reliability are greatly improved.

[0191]

As described above, according to the present invention, a compressor having a variable operating frequency, a condenser, and a corresponding product storage room provided for each of a plurality of product storage rooms are provided with a cooling mode. A valve that closes when the temperature is below the lower limit temperature or in the heating mode and opens when the temperature is higher than the lower limit temperature in the cooling mode;
A refrigerant circuit configured by sequentially pipe-connecting a cooler provided for each of the plurality of product storage rooms including a product storage room that can be switched between a heating mode and a cooling mode in an annular manner; Compressor operation control means for operating the compressor at the set operating frequency, cooling chamber number detecting means for detecting the number of the product storage chambers performing cooling by the cooler, and the cooling chamber number detecting means. Control means for instructing the compressor operation control means a lower operating frequency as the number of chambers is smaller in accordance with the detected number of chambers, and can be controlled with a load amount corresponding to the number of product storage rooms in the cooling mode, When the amount is small, the operating frequency of the compressor can be reduced to save energy. In addition, by lowering the frequency of the compressor, the life of the compressor can be improved by reducing wear of the mechanical parts of the compressor. Further, the influence on global warming is extremely small, which can contribute to improving the global environment.

When the operating frequency is variable, the compressor, the condenser, and the plurality of product storage chambers are provided for each of the corresponding product storage chambers in the cooling mode at a temperature lower than the lower limit temperature or in the heating mode. A valve is provided for each of the plurality of product storage rooms including a valve which closes in the case of the cooling mode and opens when the temperature is higher than the lower limit temperature in the cooling mode, and a product storage room which can be switched between the heating mode and the cooling mode. A refrigerant circuit formed by sequentially connecting a cooler with a pipe in a ring shape; a compressor operation control means for operating the compressor at a commanded operating frequency; and a product storage switchable between a heating mode and a cooling mode. Product temperature detecting means provided for each of a plurality of product storage chambers including a room, timer means for starting counting when the temperature detected by the product temperature detecting means is higher than a certain temperature, and product temperature detecting means. If the detected product temperature is higher than a certain temperature, the control means instructs the compressor operation control means to operate at a low frequency until the value counted by the timer means exceeds a certain time. When the load of the compressor is very large, the load on the compressor is increased by lowering the operating frequency of the compressor for a certain period of time, cooling can be performed without operating the protection device, and the reliability of the compressor is improved. In addition, energy saving can be achieved by lowering the operating frequency of the compressor, and the life of the compressor can be improved by lowering the frequency of the compressor under high load, such as by reducing the wear of the mechanical part of the compressor.

Further, when the operating frequency is variable, the compressor, the condenser, and the plurality of product storage chambers are provided for each of the corresponding product storage chambers in the cooling mode at a temperature lower than the lower limit temperature or in the heating mode. A valve is provided for each of the plurality of product storage rooms including a valve which closes in the case of the cooling mode and opens when the temperature is higher than the lower limit temperature in the cooling mode and a product storage room which can be switched between the heating mode and the cooling mode. A refrigerant circuit formed by sequentially connecting a cooler with a circular pipe, a compressor operation control means for operating the compressor at a commanded operation frequency, and a system temperature detection for detecting a temperature of the compressor or the condenser Means,
When the product temperature detected by the product temperature detecting means is higher than a certain temperature, a low operating frequency is instructed to the compressor operation control means, and when the temperature detected by the system temperature detecting means falls below the certain temperature, the high operating frequency is compressed. Control means for instructing the compressor operation control means, it is possible to accurately estimate the state where the load exceeds the limit, and to reduce the operating frequency of the compressor only when the load is greatly increased, The effect on cooling performance can be minimized without reducing reliability. Further, energy saving can be achieved because the operating frequency of the compressor is reduced.

Further, when the operating frequency of the compressor, the condenser, and the plurality of product storage rooms are provided for each of the plurality of product storage rooms and the corresponding product storage room is in the cooling mode and is lower than the lower limit temperature or the heating mode is used. A valve is provided for each of the plurality of product storage rooms including a valve which closes in the case of the cooling mode and opens when the temperature is higher than the lower limit temperature in the cooling mode, and a product storage room which can be switched between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting a cooler and a pipe in a ring shape, a compressor operation control unit that operates the compressor at a commanded operation frequency, and a compressor operation detection unit that detects an operation of the compressor. A timer means for starting counting when the compressor starts operating by the compressor operation detecting means; and a high operating frequency of the compressor operation control means when the compressor is continuously operated for a certain time or more by the timer means. To consists of a control means for instructing a change in the environment, without the operation rate of the compressor can not be maintained cooling performance exceeds 100% due to the effect of such clogging of the condenser,
Appropriate cooling capacity can be provided.

Further, when the operating frequency of the compressor, the condenser, and the plurality of product storage rooms are provided for each of the plurality of product storage rooms and the corresponding product storage rooms are in the cooling mode and the lower limit temperature or lower, or the heating mode is used. A valve is provided for each of the plurality of product storage rooms including a valve which closes in the case of the cooling mode and opens when the temperature is higher than the lower limit temperature in the cooling mode, and a product storage room which can be switched between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting a cooler with a pipe in a ring shape; a compressor operation control means for operating the compressor at a commanded operation frequency; and a compressor operation rate for detecting an operation rate of the compressor. Detecting means, a product temperature detecting means provided for each of the plurality of product storage rooms, and instructing the compressor operation control means a high operating frequency when the temperature detected by the product temperature detecting means is high, The product temperature When the temperature detected by the informing means is low, a low operating frequency is instructed to the compressor operation controlling means, and the compressor operating rate detecting means comprises control means for keeping the operating rate of the compressor constant. It can be set as high as does not affect the cooling performance, maximizes the capacity of the compressor against load fluctuations, and when the load is small, reduces the operating frequency of the compressor to save energy. Further, by lowering the frequency of the compressor, it is possible to improve the life of the compressor, such as by reducing the wear of the mechanical parts of the compressor.

Further, when the operating frequency of the compressor, the condenser, and the plurality of product storage rooms are provided for each of the plurality of product storage rooms and the corresponding product storage rooms are in the cooling mode and are at or below the lower limit temperature or in the heating mode. A valve is provided for each of the plurality of product storage rooms including a valve which closes in the case of the cooling mode and opens when the temperature is higher than the lower limit temperature in the cooling mode, and a product storage room which can be switched between the heating mode and the cooling mode. A refrigerant circuit formed by sequentially connecting a cooler with a pipe in a ring shape; a compressor operation control means for operating the compressor at a commanded operating frequency; and a product storage switchable between a heating mode and a cooling mode. A cooling fan provided for each of a plurality of product storage chambers including a cooling chamber, an air flow control means for varying an air flow of the cooling fan, a product sales number counting means, and the product storage in the cooling mode. In the room In accordance with the number of products sold per unit time, when the sales volume is high, the high operation frequency is instructed to the compressor operation control means and at the same time the air volume control means is instructed to increase the air flow, and when the sales volume is low, the operation is low Control means for instructing the compressor operation control means to operate the operating frequency and simultaneously instructing the air volume control means to reduce the air volume, and controlling the compressor operation rate to be constant by the compressor operation rate detection means, Even when the sales volume is large, the load can be controlled by the air volume control, and energy can be saved. Further, by lowering the frequency of the compressor, it is possible to improve the life of the compressor, such as by reducing the wear of the mechanical parts of the compressor.

Further, when the operating frequency of the compressor, the condenser, and the plurality of product storage rooms are provided for each of the plurality of product storage rooms and the corresponding product storage room is in the cooling mode or lower than the lower limit temperature or the heating mode. A valve is provided for each of the plurality of product storage rooms including a valve which closes in the case of the cooling mode and opens when the temperature is higher than the lower limit temperature in the cooling mode, and a product storage room which can be switched between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting a cooler with a pipe in a ring shape; compressor operation control means for operating the compressor at a commanded operating frequency;
Mode switching detecting means for detecting switching from the cooling mode to the cooling mode or from the cooling mode to the heating mode;
Timer switching means for detecting switching from the heating mode to the cooling mode by the mode switching detecting means and starting counting, and switching from the heating mode to the cooling mode by the mode switching detecting means. Control means for instructing the compressor operation control means a high operation frequency until the value counted by the timer means exceeds a predetermined time, and the operation frequency of the compressor is increased for a predetermined time to quickly reach the set temperature. Can be cooled to
You won't miss out on sales opportunities to customers. Also,
Rapid cooling reduces operating time at high operating frequencies and improves reliability.

Further, when the operating frequency of the compressor, the condenser, and the plurality of product storage rooms are provided for each of the plurality of product storage rooms and the corresponding product storage room is in the cooling mode or lower than the lower limit temperature or in the heating mode. A valve is provided for each of the plurality of product storage rooms including a valve which closes in the case of the cooling mode and opens when the temperature is higher than the lower limit temperature in the cooling mode, and a product storage room which can be switched between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting a cooler with a pipe in a ring shape; compressor operation control means for operating the compressor at a commanded operating frequency;
Mode switching detecting means for detecting switching from a cooling mode to a cooling mode or from a cooling mode to a heating mode, and the plurality of product storage rooms including a product storage room switchable between a heating mode and a cooling mode. When a switch from the heating mode to the cooling mode is detected by the product temperature detecting means provided for each of the product storage rooms and the mode switching detecting means, the temperature detected by the product temperature detecting means. Control means for instructing the compressor operation control means a high operation frequency until the temperature falls below a certain temperature, and can quickly cool down to the set temperature, and can accurately determine the product temperature and reduce opportunities at a high operation frequency. , Energy saving,
A compressor having a variable operating frequency, a condenser, and a plurality of product storage chambers, each of which is provided for each of the plurality of product storage chambers and closed when the cooling mode is lower than the lower limit temperature or in the heating mode. A valve that opens when the temperature is higher than the lower limit temperature in the cooling mode, and a cooler provided for each of the plurality of product storage rooms including the product storage room that can be switched between the heating mode and the cooling mode. A refrigerant circuit configured by connecting the pipes in a ring, a compressor operation control means for operating the compressor at a commanded operating frequency, a door opening / closing detection means for detecting opening / closing of an opening / closing door of a product storage room, Timer means for starting counting after the door is closed by the door opening / closing detecting means, merchandise sales number counting means, and when the sales amount is large by the merchandise sales number counting means, a certain time after the opening / closing door is closed by the timer means is long. Before operating frequency Control means for instructing the compressor operation control means increases the operating frequency of the compressor for a certain period of time for a high load during product filling, allowing the compressor to quickly cool down to the set temperature, increasing sales opportunities to customers. You won't miss it. In addition, opportunities at a high operation frequency are reduced, and energy saving and reliability improvement of the compressor can be achieved.

Further, when the operating frequency is variable, the compressor, the condenser, and the plurality of product storage chambers are provided for each of the corresponding product storage chambers in the cooling mode at a temperature lower than the lower limit temperature or in the heating mode. A valve is provided for each of the plurality of product storage rooms including a valve which closes in the case of the cooling mode and opens when the temperature is higher than the lower limit temperature in the cooling mode, and a product storage room which can be switched between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting a cooler with a pipe in a ring shape, a compressor operation control means for operating the compressor at a commanded operating frequency, and a system for detecting a temperature of the compressor or the condenser Temperature detection means, temperature determination means set for each frequency to be compared with the temperature detected by the system temperature detection means, and the number of times the temperature detected by the system temperature detection means exceeds the temperature of the determination means An abnormal temperature counting means for counting, a display means for displaying a warning display and the like, and a control means for displaying a warning by the display means when the number of times counted by the abnormal temperature counting means reaches a certain value or more. Even if the operating frequency of the compressor is changed in response to the change, a radiation abnormality due to clogging of the condenser or the like can be detected, and the reliability of the compressor can be secured. Further, it is possible to eliminate wasteful consumption of power caused by abnormal heat radiation due to clogging of the condenser or the like.

Further, an outside air temperature detecting means for detecting the outside air temperature of the vending machine, a correcting section for correcting the temperature curve of the judging means according to the detected outside air temperature, and a temperature detected by the system temperature detecting means for correcting the temperature. Abnormal temperature counting means for counting the number of times exceeding the temperature of the determination means corrected by the unit, and control means for displaying a warning by the display means when the number of times counted by the abnormal temperature counting means reaches a certain value or more. Even if the operating frequency of the compressor fluctuates in response to load fluctuations, it is possible to detect abnormal heat radiation due to clogging of the condenser, etc. When it is predicted that the load of the compressor is small, it is possible to determine whether the condenser is clogged or the like before a heat radiation abnormality occurs by correcting the determination means. Further, it is possible to eliminate wasteful consumption of power caused by abnormal heat radiation due to clogging of the condenser or the like.

[Brief description of the drawings]

FIG. 1 is a refrigerant circuit diagram of a vending machine according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a control system of a cooling device of the vending machine of the embodiment.

FIG. 3 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 4 is a block diagram showing a configuration of a control system of a cooling device of a vending machine according to a second embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 6 is a block diagram showing a configuration of a control system of a cooling device of a vending machine according to Embodiment 3 of the present invention.

FIG. 7 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 8 is a block diagram showing a configuration of a control system of a cooling device of a vending machine according to Embodiment 4 of the present invention.

FIG. 9 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 10 is a block diagram showing a configuration of a control system of a cooling device of a vending machine according to Embodiment 5 of the present invention.

FIG. 11 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 12 is a block diagram illustrating a configuration of a control system of a cooling device of a vending machine according to a sixth embodiment of the present invention.

FIG. 13 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 14 is a block diagram showing a configuration of a control system of a cooling device of a vending machine according to Embodiment 7 of the present invention.

FIG. 15 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 16 is a block diagram showing a configuration of a control system of a cooling device of a vending machine according to Embodiment 8 of the present invention.

FIG. 17 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 18 is a block diagram showing a configuration of a control system of a cooling device of a vending machine according to Embodiment 9 of the present invention.

FIG. 19 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 20 is a block diagram showing a configuration of a control system of a cooling device of a vending machine according to Embodiment 10 of the present invention.

FIG. 21 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 22 is a block diagram showing a configuration of a control system of a cooling device of a vending machine according to Embodiment 11 of the present invention.

FIG. 23 is a flowchart showing the operation of the cooling device of the vending machine of the embodiment.

FIG. 24 is a schematic configuration diagram showing the configuration of a conventional vending machine.

[Explanation of symbols]

1A, 1B, 1C Commodity storage room 2A, 2B, 2C Cooler 3A, 3B, 3C Commodity heater 4A Compressor 7A, 7B, 7C Throttle device 9 Condenser 14 Compressor operation control means 15A, 15B, 15C Cooler Fans 16A, 16B, 16C Commodity temperature detecting means 17 Cooling chamber number detecting means 18A, 18B, 18C, 18D, 18E, 18F, 1
8G, 18H, 18J, 18K, 18L Control means 19A, 19B, 19C, 19D Timer means 20A, 20B System temperature detecting means 21 Compressor operation detecting means 22 Compressor operation rate detecting means 23 Cooler fan speed control means 24A, 24B Sales number counting means 25 Mode switching detection means 26 Door open / close detection means 27 Judgment means 28 Abnormal temperature detection means 29 Display means 30 Outside air temperature detection means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kenzo Oku 4-5-2-5 Takaidahondori, Higashiosaka-shi, Osaka Inside Matsushita Refrigerator Co., Ltd. (72) Goro Kishimoto 4-chome Takaidahondori, Higashiosaka-shi, Osaka 2-5 Matsushita Refrigerating Machinery Co., Ltd. (72) Inventor Morishi Yoshida 4-5-2-5 Takaida Hondori, Higashi-Osaka City, Osaka Pref. Matsushita Refrigerating Machinery Co., Ltd. (72) Inventor Isao Oshitani Takaitamoto, Higashi-Osaka City, Osaka Prefecture 4-5-2 Matsushita Refrigeration Co., Ltd. F term (reference) 3E044 AA01 DB16 FB11 3L045 AA02 BA01 CA02 DA02 EA01 GA07 HA03 HA07 KA09 LA06 LA10 LA18 MA01 MA05 NA15 NA19 PA02 PA03 PA05

Claims (11)

[Claims] 1. A compressor having a variable operating frequency, a condenser,
It is provided for each of the plurality of product storage rooms and is closed when the corresponding product storage room is below the lower limit temperature in the cooling mode or in the heating mode and opened when it is higher than the lower limit temperature in the cooling mode. A refrigerant circuit configured by connecting a valve and a cooler provided for each of the plurality of product storage chambers including a product storage chamber that can be switched between a heating mode and a cooling mode in a sequential annular manner. A compressor operation control means for operating the compressor at a commanded operating frequency; a cooling chamber number detecting means for detecting the number of the product storage chambers performing cooling by the cooler; and the number of cooling chambers A cooling device for a vending machine, comprising: cooling control means for instructing the compressor operation control means a lower operation frequency as the number of rooms is smaller in accordance with the number of rooms detected by the detection means. 2. A compressor having a variable operating frequency, a condenser,
It is provided for each of the plurality of product storage rooms and is closed when the corresponding product storage room is below the lower limit temperature in the cooling mode or in the heating mode and opened when it is higher than the lower limit temperature in the cooling mode. A refrigerant circuit configured by connecting a valve and a cooler provided for each of the plurality of product storage chambers including a product storage chamber that can be switched between a heating mode and a cooling mode in a sequential annular manner. A product provided for each of the plurality of product storage rooms including a compressor operation control means for operating the compressor at a commanded operation frequency and a product storage room switchable between a heating mode and a cooling mode; Temperature detecting means, timer means for starting counting when the temperature detected by the commodity temperature detecting means is higher than a predetermined temperature, and timer means for starting counting when the commodity temperature detected by the commodity temperature detecting means is higher than the predetermined temperature. Cooling device for an automatic vending machine numbers counted in Ma means comprises a cooling control means for instructing said compressor operation control means a low operating frequency to more than a predetermined time. 3. A compressor having a variable operating frequency, a condenser,
It is provided for each of the plurality of product storage rooms and is closed when the corresponding product storage room is below the lower limit temperature in the cooling mode or in the heating mode and opened when it is higher than the lower limit temperature in the cooling mode. A refrigerant circuit configured by connecting a valve and a cooler provided for each of the plurality of product storage chambers including a product storage chamber that can be switched between a heating mode and a cooling mode in a sequential annular manner. A compressor operation control means for operating the compressor at a commanded operation frequency, a system temperature detection means for detecting the temperature of the compressor or the condenser, and a commodity temperature detected by the commodity temperature detection means being constant. If the temperature is higher than the temperature, a low operation frequency is commanded to the compressor operation control means, and if the temperature detected by the system temperature detection means falls below a certain temperature, the high operation frequency is set to the compressor operation control means. Cooling device for an automatic vending machine comprising a cooling control means for instructing the. 4. A compressor having a variable operating frequency, a condenser,
It is provided for each of the plurality of product storage rooms and is closed when the corresponding product storage room is below the lower limit temperature in the cooling mode or in the heating mode and opened when it is higher than the lower limit temperature in the cooling mode. A refrigerant circuit configured by connecting a valve and a cooler provided for each of the plurality of product storage chambers including a product storage chamber that can be switched between a heating mode and a cooling mode in a sequential annular manner. A compressor operation control means for operating the compressor at a commanded operation frequency, a compressor operation detection means for detecting an operation of the compressor, and a count when the compressor starts operation by the compressor operation detection means. A vending machine comprising: timer means for starting the operation; and cooling control means for instructing the compressor operation control means a high operation frequency when the compressor is continuously operated for a certain period of time or longer by the timer means. Retirement system. 5. A compressor having a variable operating frequency, a condenser,
It is provided for each of the plurality of product storage rooms and is closed when the corresponding product storage room is below the lower limit temperature in the cooling mode or in the heating mode and opened when it is higher than the lower limit temperature in the cooling mode. A refrigerant circuit configured by connecting a valve and a cooler provided for each of the plurality of product storage chambers including a product storage chamber that can be switched between a heating mode and a cooling mode in a sequential annular manner. A compressor operation control unit that operates the compressor at a commanded operation frequency; a compressor operation ratio detection unit that detects an operation ratio of the compressor; and a compressor operation ratio detection unit that is provided for each of the plurality of product storage rooms. Commodity temperature detection means, and when the temperature detected by the commodity temperature detection means is high, instructs a high operation frequency to the compressor operation control means,
When the temperature detected by the commodity temperature detecting means is low, a low operating frequency is instructed to the compressor operation controlling means, and the compressor operating rate detecting means comprises a cooling control means for keeping the operating rate of the compressor constant. Vending machine cooling system. 6. A compressor having a variable operating frequency, a condenser,
It is provided for each of the plurality of product storage rooms and is closed when the corresponding product storage room is below the lower limit temperature in the cooling mode or in the heating mode and opened when it is higher than the lower limit temperature in the cooling mode. A refrigerant circuit configured by connecting a valve and a cooler provided for each of the plurality of product storage chambers including a product storage chamber that can be switched between a heating mode and a cooling mode in a sequential annular manner. A compressor operation control means for operating the compressor at a commanded operating frequency, and a plurality of product storage rooms including a product storage room switchable between a heating mode and a cooling mode. Cooler fan, air volume control means for varying the air volume of the fan for the cooler, merchandise sales number counting means, sales volume according to the number of products sold per unit time in the product storage room in the cooling mode, If the high operation frequency is instructed to the compressor operation control means and the air volume control means is simultaneously instructed to increase the air volume, and if the sales volume is small, the low operation frequency is instructed to the compressor operation control means and the air volume is simultaneously controlled. A cooling device for a vending machine, comprising: a cooling control unit that instructs the air volume control unit to reduce the air flow rate, and makes the compressor operation ratio constant by the compressor operation ratio detection unit. 7. A compressor having a variable operating frequency, a condenser,
It is provided for each of the plurality of product storage rooms and is closed when the corresponding product storage room is below the lower limit temperature in the cooling mode or in the heating mode and opened when it is higher than the lower limit temperature in the cooling mode. A refrigerant circuit configured by connecting a valve and a cooler provided for each of the plurality of product storage chambers including a product storage chamber that can be switched between a heating mode and a cooling mode in a sequential annular manner. A compressor operation control means for operating the compressor at a commanded operation frequency, and a mode for detecting switching from the heating mode to the cooling mode or from the cooling mode to the heating mode. Switching detection means, timer means for detecting switching from the heating mode to the cooling mode by the mode switching detection means, and starting counting, and heating mode by the mode switching detection means. When switching to cooling mode is detected, Cooling device for an automatic vending machine numbers counted in Ma means comprises a cooling control means for instructing the high operating frequency to exceed a certain time to the compressor operation control means. 8. A compressor having a variable operating frequency, a condenser,
It is provided for each of the plurality of product storage rooms and is closed when the corresponding product storage room is below the lower limit temperature in the cooling mode or in the heating mode and opened when it is higher than the lower limit temperature in the cooling mode. A refrigerant circuit configured by connecting a valve and a cooler provided for each of the plurality of product storage chambers including a product storage chamber that can be switched between a heating mode and a cooling mode in a sequential annular manner. A compressor operation control means for operating the compressor at a commanded operation frequency, and a mode for detecting switching from the heating mode to the cooling mode or from the cooling mode to the heating mode. A switch detection unit, a product temperature detection unit provided for each of the plurality of product storage rooms including a product storage room switchable between a heating mode and a cooling mode, and heating by the mode switching detection unit. From warm mode to cooling mode Cooling device for an automatic vending machine in which the temperature detected by the case the product temperature detection means detects the changed is composed of a cooling control means for instructing said compressor operation control means the higher operating frequency to below a certain temperature. 9. A compressor having a variable operating frequency, a condenser,
It is provided for each of the plurality of product storage rooms and is closed when the corresponding product storage room is below the lower limit temperature in the cooling mode or in the heating mode and opened when it is higher than the lower limit temperature in the cooling mode. A refrigerant circuit configured by connecting a valve and a cooler provided for each of the plurality of product storage chambers including a product storage chamber that can be switched between a heating mode and a cooling mode in a sequential annular manner. A compressor operation control means for operating the compressor at a commanded operating frequency, a door open / close detection means for detecting the opening / closing of the open / close door of the product storage room, and a counting after the open / close door is closed by the door open / close detection means. When the sales amount is large by the commodity sales number counting means, the timer operation means instructs the compressor operation control means to perform a high operation frequency for a certain time after the door is closed by the timer means. Cool Cooling device for an automatic vending machine comprising a control unit. 10. A compressor having a variable operating frequency, a condenser, and a plurality of product storage rooms, each of which is provided with a corresponding product storage room in a cooling mode at a temperature lower than a lower limit temperature or a heating mode. A valve is provided for each of the plurality of product storage rooms including a valve which closes in the case of the cooling mode and opens when the temperature is higher than the lower limit temperature in the cooling mode, and a product storage room which can be switched between the heating mode and the cooling mode. A refrigerant circuit configured by sequentially connecting a cooler with a pipe in a ring shape, a compressor operation control means for operating the compressor at a commanded operating frequency, and a system for detecting a temperature of the compressor or the condenser Temperature detecting means, determining means for a temperature set for each frequency to be compared with the temperature detected by the system temperature detecting means, and the number of times the temperature detected by the system temperature detecting means exceeds the temperature of the determining means Total An abnormal temperature counting means for counting, a display means for displaying a warning display or the like, and a cooling control means for displaying a warning by the display means when the number of times counted by the abnormal temperature counting means reaches a certain value or more. Vending machine cooling system. 11. An outside air temperature detecting means for detecting an outside air temperature of a vending machine, a correcting section for correcting a temperature curve of said determining means according to the detected outside air temperature, and a temperature detected by said system temperature detecting means. An abnormal temperature counting means for counting the number of times exceeding the temperature of the determination means corrected by the correction unit; and displaying a warning by the display means when the number of times counted by the abnormal temperature counting means reaches a certain value or more. The cooling device for a vending machine according to claim 10, comprising cooling control means.