JP2017199218A - Commodity storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a commodity storage device such as a vending machine, capable of preventing overload on a cooling device, and keeping temperature of commodities to optimal temperature for a longer time compared with the prior art.SOLUTION: A commodity storage device comprises: a cooling device 7 for cooling inside of a commodity storage chamber; a load correlation value detection part 12 for detecting a load correlation value which correlates to a load on the cooling device 7; and a control device 14 for controlling the cooling device 7. The control device 14 executes a protective operation of the cooling device 7 when the load correlation value becomes equal to or more than a first threshold, and releases the protective operation of the cooling device 7 when the load correlation value becomes equal to or less than a second threshold smaller than the first threshold. The control device 14 controls the cooling device 7 so that cooling performance of the cooling device 7 becomes higher than that during a normal operation, after the release of the protective operation of the cooling device 7.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a product storage device that stores products and cools the stored products.

  Many of the cooling devices mounted on commodity storage devices such as vending machines include a compressor, and are configured to stop the cooling operation when the load on the compressor becomes excessive. However, since the load of the compressor usually increases when the outside air temperature is high, the cooling operation stops when the temperature in the product storage column or the product storage (that is, the temperature of the stored product) increases. Invite. Therefore, for example, in the vending machine cooling device described in Patent Document 1, when the compressor is likely to be overloaded, by alternately cooling the left product storage column and the right product storage column, The cooling operation is continued while reducing the load on the compressor.

JP-A-8-212448

  However, in the vending machine cooling device described in Patent Document 1, for example, when a high outside air temperature continues for a long time, each product storage column is not sufficiently cooled and is stored in each product storage column. There is a risk that the temperature of the product will rise. Moreover, when the state where the outside air temperature is very high continues, it may occur that the cooling of both the commodity storage columns must be stopped. For this reason, the cooling device for the vending machine described in Patent Document 1 still has a problem that it is difficult to keep the temperature of the accommodated product at an appropriate temperature in summer. In particular, in recent years, so-called hot days have increased in the summer, and it is predicted that the compressor will be overloaded or likely to occur frequently or over a long period of time. For this reason, a technique for coping with such a situation is desired.

  Therefore, the present invention has an object to enable a product storage device such as a vending machine to maintain the temperature of a stored product at an appropriate temperature for a longer time than in the past while protecting the cooling device from overload. And

  According to an aspect of the present invention, the commodity storage device includes a commodity storage that stores the commodity, a cooling device that cools the inside of the commodity storage, and a load correlation that detects a load correlation value that correlates with a load of the cooling device. A value detection unit and a control device for controlling the cooling device, wherein the cooling operation of the cooling device is stopped or the cooling performance of the cooling device is lowered when the load correlation value is equal to or greater than a first threshold value. And a control device that executes a protection operation for protecting the device and releases the protection operation when the load correlation value is equal to or less than a second threshold value that is smaller than the first threshold value. The control device controls the cooling device so that the cooling performance is higher than that during normal operation after the protection operation is released.

  In the commodity storage device, when the load correlation value is equal to or higher than a first threshold value, the control device performs a protection operation for protecting the cooling device by stopping the cooling operation of the cooling device or reducing the cooling performance. For this reason, the cooling device is protected from overload. Moreover, the said control apparatus controls the said cooling device so that the said cooling performance becomes higher than the time of a normal driving | operation after cancellation | release of the said protection operation | movement. For this reason, even if the temperature of the product deviates from an appropriate temperature due to the execution of the protection operation, the temperature of the product is returned to an appropriate temperature earlier than before, and / or before the execution of the protection operation. The product can be cooled to a lower temperature than before, and as a result, the temperature of the product can be maintained at an appropriate temperature for a longer time than before.

It is side surface sectional drawing of the vending machine which is one Embodiment of the goods accommodation apparatus of this invention. It is a functional block diagram regarding control of the temperature (product temperature) in the goods storage in the said vending machine. It is a flowchart which shows the protection operation | movement of the cooling device of the said vending machine. It is a flowchart which shows 1st temperature shift control. It is a flowchart which shows the process which determines whether 2nd temperature shift control is performed. It is a flowchart which shows the said 2nd temperature shift control.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Here, the case where the commodity accommodation apparatus according to the embodiment of the present invention is a vending machine will be described. However, the present invention is not limited thereto, and the commodity accommodation apparatus according to the present invention accommodates and accommodates goods. Any device can be used as long as the product can be cooled.

  FIG. 1 is a side cross-sectional view of a vending machine 1 which is an embodiment of the commodity accommodation apparatus of the present invention. The vending machine 1 which concerns on embodiment is comprised so that the drinks contained in containers, such as a canned drink and a drink with a plastic bottle, may be mainly accommodated as the goods P, and it may cool and sell. As shown in FIG. 1, the vending machine 1 includes a product storage 2 and a plurality of product storage columns 3 disposed in the product storage 2. The product storage column 3 has a pair of product passages 4 extending in the vertical direction. Each of the pair of product passages 4 has a product carry-out device 5 at the lower part thereof. The product carry-out device 5 is configured to drop in order from the lowest product P1 among the plurality of products P stacked and accommodated in the corresponding product passage 4 in the vertical direction, and carry them out to the product outlet 6. Yes. In the vending machine 1, when the user (purchaser) pays the price of the desired product P or performs an action corresponding thereto, the corresponding product take-out device 5 is driven to transfer the desired product P to the product take-out port 6. It is configured to be carried out.

  The vending machine 1 has a cooling device 7 that cools the inside of the commodity storage 2. The product P is cooled by the cooling device 7 cooling the inside of the product storage 2. The cooling device 7 includes a compressor 71, an external heat exchanger 72, and an electronic expansion valve (expansion mechanism) 73 disposed in the machine room 8 (that is, outside the product storage 2) below the product storage 2. And an in-compartment heat exchanger 74 disposed in the vicinity of the bottom in the commodity storage 2. The compressor 71, the external heat exchanger 72, the electronic expansion valve 73, and the internal heat exchanger 74 are connected by a refrigerant pipe 75 through which the refrigerant flows. Further, in the vicinity of the external heat exchanger 72, an external fan 76 for blowing air outside the product storage 2 (external air) to the external heat exchanger 72 is provided, and the internal heat exchanger 74 is provided. Is provided with an in-compartment fan 77 that blows air in the product storage compartment 2 (in-container air) to the in-compartment heat exchanger 74. Here, although the electronic expansion valve 73 is disposed in the machine room 8, the electronic expansion valve 73 may be disposed in the commodity storage 2.

  The compressor 71 compresses the refrigerant. The outside heat exchanger 72 cools the refrigerant compressed by the compressor 71 by causing heat exchange between the refrigerant compressed by the compressor 71 and the outside air. The electronic expansion valve 73 further cools the refrigerant that has passed through the external heat exchanger 72 by expanding the refrigerant that has passed through the external heat exchanger 72. The in-compartment heat exchanger 74 cools the inside of the product container 2 by causing heat exchange between the refrigerant that has passed through the electronic expansion valve 73 and the in-compartment air.

  FIG. 2 is a functional block diagram relating to the control of the temperature in the product storage 2 (internal temperature). As shown in FIG. 2, the vending machine 1 includes the above-described cooling device 7, the internal temperature detection unit 11, the load correlation value detection unit 12, and a memory as a configuration for controlling the internal temperature. 13 and a control device 14.

  The internal temperature detection unit 11 detects the internal temperature. The internal temperature detection unit 11 may be a temperature sensor disposed in the commodity storage 2, for example. The internal temperature detection unit 11 outputs (provides) the detection result of the internal temperature to the control device 14.

  The load correlation value detection unit 12 detects a load correlation value that correlates with the load of the cooling device 7 (mainly the load of the compressor 71). The load on the cooling device 7 (or the compressor 71) increases as the ambient temperature (outside air temperature) of the vending machine 1 increases. Further, when the outside air temperature increases, the temperature of the compressor 71, the temperature of the external heat exchanger 72, the temperature of the refrigerant discharged from the compressor 71, and the like increase. That is, the outside air temperature, the temperature of the compressor 71, the temperature of the external heat exchanger 72, and / or the temperature of the high-pressure side portion of the refrigerant pipe 75 is the load of the cooling device 7 (mainly the load of the compressor 71). Correlate with Therefore, the load correlation value detection unit 12 includes an outside temperature sensor that detects the outside temperature, a compressor temperature sensor that detects the temperature of the compressor 71, and an outside heat exchanger temperature sensor that detects the temperature of the outside heat exchanger 72. Further, it may be a pipe temperature sensor that detects the temperature of the high-pressure side part of the refrigerant pipe 75 (that is, any part between the refrigerant outlet part of the compressor 71 and the refrigerant inlet part of the expansion mechanism 73). The load correlation value detection unit 12 outputs (provides) the detection result of the load correlation value to the control device 14.

  The memory 13 stores various programs and various data necessary for controlling the operation of the cooling device 7.

  The control device 14 has a timer function, a clock function, a counter function, and the like. In addition, the control device 14 stores the memory 13 based on the internal temperature input (provided) from the internal temperature detection unit 11 and the load correlation value input (provided) from the load correlation value detection unit 12. The cooling device 7 is controlled according to the stored program. Specifically, the control device 14 mainly controls the compressor 71, the electronic expansion valve 73, the external blower fan 76, and the internal blower fan 77 as appropriate. Hereinafter, control of the cooling device 7 performed by the control device 14 will be described.

〔Normal operation〕
Based on the internal temperature and a preset temperature (set temperature), the control device 14 controls the operation of the cooling device 7 so that the internal temperature is maintained at the set temperature. Specifically, in this embodiment, the control device 14 periodically inputs the internal temperature from the internal temperature detection unit 11 and when the input internal temperature exceeds the upper limit value of the set temperature. The compressor 71, the outside fan 76 and the inside fan 77 (hereinafter referred to as “the compressor 71 etc.”) are driven and the number of rotations of the compressor 71 and the opening of the electronic expansion valve 73 are appropriately set as necessary. The inside of the product storage 2 is controlled to be cooled (the internal temperature is lowered). Thereafter, when the input internal temperature falls to the lower limit value of the set temperature, the control device 14 stops driving the compressor 71 and the like. The set temperature is, for example, 5 ° C.

[Protection operation of cooling device 7]
The vending machine 1 is often installed outdoors. Further, as described above, in recent years, so-called extremely hot days are increasing in the summer, and the outside air temperature may be abnormally high. When the outside air temperature becomes abnormally high, the temperatures of the compressor 71 and the external heat exchanger 72 are excessively increased, the cooling device 7 (mainly the compressor 71) is overloaded, and the life of the cooling device 7 is reduced. Invite. Therefore, when the cooling device 7 is likely to be overloaded, the control device 14 protects the cooling device 7 from overload by stopping the cooling operation of the cooling device 7.

  FIG. 3 is a flowchart showing the protection operation of the cooling device 7 by the control device 14. This flow is executed at a predetermined cycle while the vending machine 1 is in operation, for example.

  In FIG. 3, in step S1, it is determined whether or not the protection operation of the cooling device 7 is being executed. If the protection operation has not been performed, the process proceeds to step S2, and if the protection operation is being performed, the process proceeds to step S5.

  In step S <b> 2, the load correlation value is input from the load correlation value detection unit 12. As described above, the load correlation value may be the outside air temperature, the temperature of the compressor 71, the temperature of the external heat exchanger 72, and / or the temperature of the portion on the high pressure side in the refrigerant pipe 75.

  In step S3, it is determined whether or not the load correlation value input in step S2 is greater than or equal to a first threshold value. If the load correlation value is greater than or equal to the first threshold value, the process proceeds to step S4, and if the load correlation value is less than the first threshold value, the flow ends. The first threshold value is set in advance as a value that may overload the cooling device 7.

  In step S4, the protection operation of the cooling device 7 is executed. Specifically, the control device 14 stops the cooling operation of the cooling device 7 by stopping the operation of the compressor 71 and the like. In addition, when the compressor 71 etc. have stopped, since the cooling operation of the cooling device 7 has already been stopped, the state is maintained.

  In step S5, as in step S2, the load correlation value is input from the load correlation value detection unit 12.

  In step S6, it is determined whether or not the load correlation value input in step S5 is equal to or less than a second threshold value (<the first threshold value). If the load correlation value is less than or equal to the second threshold value, the process proceeds to step S7. If the load correlation value exceeds the second threshold value, the flow ends. In this case, the protection operation of the cooling device 7 is maintained. The second threshold value is set in advance as a value that does not cause the cooling device 7 to be overloaded.

  In step S7, the protection operation of the cooling device 7 is canceled (terminated). Thus, normally, the compressor 71 and the like are driven, and the cooling operation of the cooling device 7 is resumed.

[First temperature shift control]
While the protection operation of the cooling device 7 is being performed, the temperature in the commodity storage 2 rises. For this reason, there is a possibility that the temperature of the product P may deviate from an appropriate temperature by executing the protection operation of the cooling device 7. In particular, when the protection operation of the cooling device 7 is continued for a relatively long time or when the protection operation of the cooling device 7 is performed a plurality of times, the temperature of the product P may greatly deviate from the appropriate temperature. In such a case, it takes time to return the temperature of the product P to an appropriate temperature simply by performing normal operation (including so-called pull-down operation) after the protection operation of the cooling device 7 is canceled.

  Therefore, in the present embodiment, the control device 14 measures the cumulative execution time and the number of executions of the protection operation of the cooling device 7, and when the cumulative execution time reaches a predetermined time or the execution number reaches the predetermined number. In this case, the cooling device 7 is controlled so that the cooling performance of the cooling device 7 is higher than that during normal operation for a predetermined period immediately after the protection operation of the cooling device 7 is released. Specifically, the control device 14 performs the first temperature shift control for controlling the cooling device 7 by shifting the set temperature to the low temperature side for a predetermined period immediately after the release of the protection operation of the cooling device 7. The cooling rate in the product container 2 by the cooling device 7 is increased. In this way, the temperature of the product P can be returned to the appropriate temperature sooner after the protection operation is released. As a result, the product P is kept at the appropriate temperature for a longer time than when the first temperature shift control is not executed. It becomes possible to hold on. Here, the protection operation of the cooling device 7 is normally performed in the daytime (in other words, a time zone in which the temperature is relatively high in one day), and at night (in other words, the temperature is compared in the day). It is not executed in the low time zone). Therefore, in the present embodiment, the control device 14 resets the cumulative execution time and the number of executions of the protection operation of the cooling device 7 on a daily basis (for example, every morning at 7:00).

  FIG. 4 is a flowchart showing the first temperature shift control. This flow is executed, for example, when the protection operation of the cooling device 7 is released (after step S7 in FIG. 3).

  In FIG. 4, in step S11, it is determined whether or not the cumulative execution time of the protection operation of the cooling device 7 has reached a predetermined time. If the cumulative execution time has not reached the predetermined time (that is, if the cumulative execution time <the predetermined time), the process proceeds to step S12. On the other hand, if the accumulated execution time has reached the predetermined time (that is, if the accumulated execution time ≧ the predetermined time), the process proceeds to step S13. The predetermined time can be appropriately set based on the performance of the vending machine 1 and the installation environment.

  In step S12, it is determined whether or not the number of executions of the protection operation of the cooling device 7 has reached a predetermined number (for example, three times). If the number of executions has not reached the predetermined number of times (that is, if the number of executions is less than the predetermined number of times), this flow is terminated. On the other hand, if the number of executions has reached the predetermined number of times (that is, if the number of executions ≧ the predetermined number of times), the process proceeds to step S13.

  In step S13, the first temperature shift control is started. Specifically, the control device 14 uses a shift set temperature (for example, 3 ° C.) obtained by shifting the set temperature to a low temperature side instead of the set temperature (for example, 5 ° C.) during normal operation, that is, the warehouse. Based on the internal temperature and the shift set temperature, the operation of the cooling device 7 is controlled so that the internal temperature is maintained at the shift set temperature.

  In step S14, it is determined whether or not the internal temperature has decreased to the shift set temperature. If the internal temperature does not fall to the shift set temperature (that is, if the internal temperature> the shift set temperature), the first temperature shift control is continued. On the other hand, if the internal temperature has decreased to the shift set temperature (that is, if the internal temperature ≦ the shift set temperature), the process proceeds to step S15. Then, in step S15, the first temperature shift control is finished, and in step S16, the cumulative execution time and the number of executions are cleared, and this flow is finished. In addition, when the protection operation of the cooling device 7 becomes necessary during the execution of the first temperature shift control, the protection operation of the cooling device 7 has priority.

[Second temperature shift control]
The protection operation of the cooling device 7 is performed mainly during the daytime (daytime) in summer. When the protection operation of the cooling device 7 is executed for a long time within one day or when the protection operation of the cooling device 7 is executed many times, the protection operation of the cooling device 7 is executed for a long time on the next day. And / or the protection operation of the cooling device 7 is expected to be performed many times. Moreover, since the temperature is usually lower at night than in the daytime, the protection operation of the cooling device 7 is released, and the product storage 2 can be cooled efficiently.

  Therefore, in the present embodiment, when the cumulative execution time of the protection operation of the daytime cooling device 7 reaches a predetermined time or when the number of executions during the day reaches a predetermined number, At night, the cooling device 7 is controlled so that the cooling performance of the cooling device 7 is higher than that during normal operation. Specifically, after the protection operation of the cooling device 7 is canceled, the control device 14 performs second temperature shift control for controlling the cooling device 7 by shifting the set temperature to the low temperature side in a predetermined time zone. By executing, the inside of the commodity storage 2 is cooled to a temperature lower than that during normal operation. If it does in this way, since goods P will be cooled to temperature lower than usual beforehand, even if it is a case where protection operation of cooling device 7 is performed, temperature of goods P is longer than usual. Can be kept at an appropriate temperature. In the second temperature shift control as well, as in the case of the first temperature shift control, the cumulative execution time and the number of executions of the protection operation of the cooling device 7 are reset on a daily basis (for example, every morning at 7:00). Is done.

  FIG. 5 is a flowchart showing processing for determining whether or not to execute the second temperature shift control. This flow is executed, for example, when the protection operation of the cooling device 7 is released (after step S7 in FIG. 3).

  In FIG. 5, step S21 and step S22 are the same as step S11 and step S12 of FIG. If the cumulative execution time of the protection operation of the cooling device 7 has reached the first predetermined time (step S21; NO), or if the number of executions of the protection operation of the cooling device 7 has reached the predetermined number of times ( Step S22: NO) The process proceeds to step S23, where the request flag F for the second temperature shift control is set (the request flag F = 1). Note that the process shown in FIG. 5 may be incorporated into the first temperature shift control (FIG. 4). In this case, the control device 14 executes the first temperature shift control and sets the request flag F in step S13 of FIG.

  FIG. 6 is a flowchart showing the second temperature shift control. This flow is executed at a predetermined cycle while the vending machine 1 is in operation, for example.

  In FIG. 6, in step S31, it is determined whether or not the request flag F is set (whether or not the request flag F = 1). If the request flag F is set (if the request flag F = 1), the process proceeds to step S32. If the request flag F is not set (the request flag F = 0), this flow ends.

  In step S32, it is determined whether or not the current time is the start time of the second temperature shift control. If the current time is the start time, the process proceeds to step S33, and if the current time is not the start time, this flow is terminated. The start time is a night time (preferably late night) time, for example, set at 23:00.

  In step S33, the second temperature shift control is started. Specifically, the control device 14 uses the shift set temperature obtained by shifting the set temperature to the low temperature side instead of the set temperature during the normal operation, that is, the internal temperature and the shift setting. Based on the temperature, the operation of the cooling device 7 is controlled so that the internal temperature is maintained at the shift set temperature.

  In step S34, it is determined whether or not the current time is the end time of the second temperature shift control. If the current time is the end time, the process proceeds to step S35, and if the current time is not the end time, the second temperature shift control is continued. The end time is a time of dawn or early morning, and is set at 7 o'clock, for example.

  In step S35, the second temperature shift control is terminated, and in step S36, the request flag F is cleared (F = 0).

  As described above, in the vending machine 1 according to the present embodiment, the control device 14 determines that the cooling device 7 is likely to be overloaded, specifically, the load correlation value is equal to or greater than the first threshold value. Then, the protection operation of the cooling device 7 is performed. That is, the control device 14 protects the cooling device 7 from overload by stopping the cooling operation of the cooling device 7. Further, the control device 14 performs temperature shift control for controlling the cooling device 7 by shifting the set temperature to the low temperature side at a predetermined time after the release of the protection operation. Specifically, in the present embodiment, the control device 14 performs the protection that is reset when the cumulative execution time of the protection operation that is reset every day reaches a predetermined time and / or every day. When the number of executions reaches the predetermined number of times, the temperature shift control is executed. Here, in the present embodiment, the temperature shift control includes the first temperature shift control executed immediately after the protection operation is canceled and a predetermined time zone (mainly at night) after the protection operation is canceled. Second temperature shift control to be executed.

  With such a configuration, the vending machine 1 according to the present embodiment protects the cooling device 7 from overload, and even if the temperature of the product P deviates from an appropriate temperature by executing the protection operation, It is possible to return the temperature of the product P that has deviated from the appropriate temperature to the appropriate temperature earlier than before and / or to cool the product P in advance to a temperature lower than before before performing the protection operation. As a result, the vending machine 1 according to the present embodiment can maintain the temperature of the product P at an appropriate temperature for a longer time than before.

  In the above-described embodiment, the control device 14 protects the cooling device 7 from overload by stopping the cooling operation of the cooling device 7. However, it is not limited to this. The control device 14 may protect the cooling device 7 from overload by reducing the cooling performance of the cooling device 7. In this case, the control device 14 may reduce the cooling performance of the cooling device 7 by reducing the rotational speed of the compressor 71 and / or reducing the opening of the electronic expansion valve 73 in step S4 of FIG. it can. Further, the control device 14 may cancel (end) the protection operation of the cooling device 7 by returning the rotation speed of the compressor 71 and / or the opening degree of the electronic expansion valve 73 in step S7 of FIG. it can.

  In the above-described embodiment, the control device 14 shifts the set temperature to the low temperature side after the protection operation of the cooling device 7 is released, and controls the cooling device 7 (the first temperature shift control, The second temperature shift control) is executed. However, it is not limited to this. The control device 14 controls the cooling device 7 so that the cooling performance of the cooling device 7 becomes higher than that during normal operation without shifting (changing) the set temperature after the protection operation of the cooling device 7 is released. You may make it do. For example, the control device 14 cools the cooling device 7 by operating the internal blower fan 77 and, if necessary, the external blower fan 76 at a higher speed than normal operation (including a fully open operation) for a predetermined time. Performance can be improved over that during normal operation. In this case, the control device 14 may cause the internal fan 77 and / or the external fan 76 to operate at a higher speed as the internal temperature is higher.

  In the above-described embodiment, the control device 14 performs the protection operation that is reset when the cumulative execution time of the protection operation that is reset every day reaches a predetermined time and / or every day. When the number of executions reaches a predetermined number, the first temperature shift control and the second temperature shift control are executed. However, it is not limited to this. When the cumulative execution time of the protection operation within a predetermined period set in advance reaches a predetermined time and / or the number of executions of the protection operation within a predetermined period set in advance is set to a predetermined number. When it reaches, the first temperature shift control and the second temperature shift control may be executed. In this case, the cumulative execution time of the protection operation and the number of executions of the protection operation are reset every predetermined period regardless of whether the first temperature shift control and / or the second temperature shift control is executed. . Further, the control device 14 may execute only one of the first temperature shift control and the second temperature shift control.

  In the above-described embodiment, the shift amount to be shifted from the set temperature to the low temperature side is equal between the first temperature shift control and the second temperature shift control. That is, a common shift set temperature is used in the first temperature shift control and the second temperature shift control. However, it is not limited to this. The shift amount shifted from the set temperature to the low temperature side may be different between the first temperature shift control and the second temperature shift control. That is, the shift set temperature used in the first temperature shift control may be different from the shift set temperature used in the second temperature shift control. In this case, although not particularly limited, for example, the shift set temperature used in the first temperature shift control may be set to a temperature lower than the shift set temperature used in the second temperature shift control.

  In addition, the control device 14 shifts the shift from the set temperature to the low temperature side based on the internal temperature when the protection operation is performed in each of the first temperature shift control and the second temperature shift control. The amount may be variably set. In this case, it is preferable that the control device 14 sets the shift amount to be larger as the average value or the highest value of the internal temperature at the time of executing the protection operation is higher, for example. For example, when the average value or maximum value of the internal temperature at the time of execution of the protection operation is equal to or lower than a predetermined temperature, the control device 14 performs the above-described first temperature shift control and second temperature shift control. The shift set temperature (for example, 3 ° C.) is used instead of the set temperature (for example, 5 ° C.). On the other hand, when the average value or the maximum value of the internal temperature during the execution of the protection operation exceeds the predetermined temperature, the control device 14 performs each of the first temperature shift control and the second temperature shift control. , A second shift set temperature (for example, 1 ° C.) lower than the shift set temperature is used instead of the set temperature.

  As mentioned above, although embodiment of this invention and its modification were demonstrated, this invention is not limited to the above-mentioned embodiment and modification, Further deformation | transformation and change are possible based on the technical idea of this invention. It is.

1 ... Vending machine (product storage device)
DESCRIPTION OF SYMBOLS 2 ... Merchandise container 7 ... Cooling device 11 ... Inside temperature detection part 12 ... Load correlation value detection part 14 ... Control apparatus 71 ... Compressor 72 ... External heat exchanger 73 ... Electronic expansion valve (expansion mechanism)
74 ... Internal heat exchanger 75 ... Refrigerant piping P (P1) ... Product

Claims (9)

A product storage for storing products;
A cooling device for cooling the inside of the commodity storage;
A load correlation value detection unit for detecting a load correlation value correlated with the load of the cooling device;
A control device that controls the cooling device, and protects the cooling device by stopping a cooling operation of the cooling device or reducing a cooling performance of the cooling device when the load correlation value is equal to or greater than a first threshold value. A controller that executes an operation and releases the protection operation when the load correlation value is equal to or lower than a second threshold value that is smaller than the first threshold value;
Including
The control device controls the cooling device so that the cooling performance is higher than that during normal operation after the protection operation is released.
Product storage device. An internal temperature detector that detects the internal temperature of the product storage,
The control device controls the cooling device so that the internal temperature is maintained at a set temperature, and shifts the set temperature to a low temperature side at a predetermined time after the release of the protection operation, thereby controlling the cooling device. Execute temperature shift control to control,
The product accommodation device according to claim 1.   The commodity storage device according to claim 2, wherein the control device performs the temperature shift control for a predetermined period immediately after the protection operation is canceled.   The commodity storage device according to claim 2, wherein the control device executes the temperature shift control after the protection operation is canceled and in a predetermined time zone.   The commodity storage device according to claim 4, wherein the control device performs the temperature shift control at night after the protection operation is released.   The control device executes the temperature shift control when a cumulative execution time of the protection operation within a predetermined period reaches a predetermined time or when the number of executions of the protection operation within a predetermined period reaches a predetermined number. The commodity storage device according to any one of claims 2 to 5.   When the cumulative execution time of the protection operation during the day reaches a predetermined time or when the number of executions of the protection operation during the day reaches a predetermined number, the control device executes the temperature shift control at night on that day. The product accommodation device according to claim 2.   The product storage according to any one of claims 2 to 7, wherein the control device sets a shift amount to be shifted from the set temperature to a low temperature side based on the internal temperature at the time of execution of the protection operation. apparatus. The cooling device includes an in-compartment heat exchanger disposed in the commodity storage, a compressor and an external heat exchanger disposed outside the commodity storage chamber, the in-compartment heat exchanger, the compressor, and A refrigerant pipe through which the refrigerant flows while connecting the external heat exchanger,
The load correlation value detecting unit calculates at least one of the ambient temperature of the commodity storage device, the temperature of the compressor, the temperature of the external heat exchanger, and the temperature of the high pressure side portion of the refrigerant pipe as the load correlation value. Detect as,
The goods accommodation apparatus as described in any one of Claims 1-8.