JP5899409B2 - Article cooling device and vending machine equipped with the same - Google Patents

Description

  The present invention relates to an article cooling apparatus that stops a cooling operation during a power saving operation and a vending machine including the same.

  In general, in vending machines that sell cooled products such as canned beverages, the air cooled by the internal heat exchanger that constitutes the refrigeration cycle together with the compressor is blown by the internal fan to cool the internal products. doing.

  In recent years, with this type of vending machine installed in Japan, in order to level the power demand in the summer, the week of three months from July to September is from 1:00 pm to 1 pm In the meantime, the product is cooled, and power saving operation is performed to stop the operation of the cooling device for 3 hours from 1 to 4 pm.

  By the way, when the operation of the refrigeration cycle is stopped for a long time, the liquid refrigerant in the internal heat exchanger almost evaporates during the stoppage of the operation, and accordingly, the liquid refrigerant in the external heat exchanger is also stored in the internal storage. Since it flows into the heat exchanger and evaporates, the inside of the refrigeration cycle is in a state of only gas refrigerant.

  For this reason, even if the operation of the compressor is resumed after the power-saving operation, in which the operation of the refrigeration cycle is stopped for a long time, liquid refrigerant is not supplied to the internal heat exchanger for a while. It takes time to cool the air.

  However, since the internal fan is operated in synchronization with the start of operation of the compressor, air that has not been cooled by the internal heat exchanger is blown into the internal compartment, and the operation of the internal fan is useless. Not only that, there is a problem that the product is actually heated.

  Therefore, in consideration of the time when the internal heat exchanger can cool the surrounding air, the internal fan operation after the compressor is stopped for a long time is delayed from the start of the compressor operation. It has been proposed to start (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 10-083482

  However, in the conventional vending machine described in Patent Document 1, the rotation speed of the internal fan during operation is constant, and the operation of the internal fan after the compressor has been stopped for a long period of time is the operation start time of the compressor. The internal fan stops even though a sufficient amount of liquid refrigerant is being supplied to the internal heat exchanger immediately before the operation of the internal fan starts. Therefore, the liquid refrigerant supplied to the internal heat exchanger cannot sufficiently exchange heat with the air around the internal heat exchanger via the internal heat exchanger.

Therefore, the ratio of the liquid refrigerant that cannot be evaporated in the internal heat exchanger increases, and the liquid refrigerant that does not evaporate returns to the compressor, and the compressor has a problem that the life is shortened by liquid compression. The present invention solves the above-described conventional problems, and suppresses the occurrence of a problem that heats the articles in the warehouse by the operation of the internal fan after the compressor is stopped for a long time by power saving operation, while suppressing the heat inside the warehouse. It is an object of the present invention to provide an article cooling apparatus and a vending machine equipped with the same that can prevent liquid refrigerant that does not evaporate in the exchanger from returning to the compressor and shortening the life of the compressor.

  In order to achieve the above object, in the article cooling apparatus of the present invention, the operation control means stops the operation of the compressor and the internal fan during the power saving operation, and starts the operation of the compressor when the power saving operation ends. For the internal fan, the rotational speed of the internal fan is set to the normal internal fan operating time until a predetermined time elapses after the compressor starts operating due to the end of the power saving operation. The number of rotations is kept lower than that.

  In the above configuration, the internal fan with a variable rotation speed is used as the internal fan, and the operation control means is the internal fan until the predetermined time elapses after the compressor starts operating due to the end of the power saving operation. Keep the number of rotations lower than the number of rotations during normal fan operation.

  Therefore, after the compressor has been stopped for a long time due to power-saving operation, liquid refrigerant that does not evaporate in the internal heat exchanger is suppressed in the compressor while suppressing the occurrence of problems that warm the articles in the warehouse due to operation of the internal fan. The compressor life can be prevented from returning.

  According to the present invention, after the compressor is stopped for a long time due to power saving operation, the liquid refrigerant that does not completely evaporate in the internal heat exchanger while suppressing the occurrence of the problem of warming the internal items due to the operation of the internal fan. Can be prevented from returning to the compressor and shortening the life of the compressor.

1 is a schematic configuration diagram showing an internal structure of a main body of a vending machine including an article cooling device according to Embodiment 1 of the present invention. Configuration diagram of refrigeration cycle of vending machine of the embodiment Block diagram showing the control system of the vending machine of the embodiment The time chart which shows the relationship between the operating state of the compressor after the power saving operation of the vending machine of the same embodiment and the rotation speed of each internal fan The flowchart which shows the control after detecting completion | finish of a power saving operation by the operation control means of the vending machine of the embodiment The flowchart which shows the other example of control after detecting the power-saving operation completion by the operation control means of the vending machine of the embodiment The flowchart which shows another example of the control after detecting the power-saving operation completion by the operation control means of the vending machine of the embodiment The flowchart which shows another example of control after detecting completion | finish of a power saving operation by the operation control means of the vending machine of the embodiment Time chart showing the relationship between the operating state of the compressor after the power saving operation of the vending machine provided with the article cooling device in Embodiment 2 of the present invention and the rotation speed of each internal fan Time chart showing the relationship between the operating state of the compressor after the power saving operation of the vending machine provided with the article cooling device in Embodiment 3 of the present invention and the rotation speed of each internal fan The flowchart which shows the control after detecting completion | finish of a power saving operation by the operation control means of the vending machine of the embodiment

The first invention comprises a refrigeration cycle together with a compressor and serves as an evaporator during cooling operation to cool the air in the warehouse, and the air cooled by the internal heat exchanger is in the warehouse An internal fan having a variable number of rotations for blowing air so as to circulate, an internal temperature detecting means for detecting internal temperature, and an operation control means for controlling the operation of the compressor and the internal fan, The operation control means stops the operation of the compressor and the internal fan during the power saving operation, and starts the operation of the compressor when the power saving operation is completed. wherein between the compressor starts operation until a predetermined time elapses suppressed example lower than the rotational speed at the time of the in-compartment fan working rotational speed of the normal of the in-compartment fan by the end of operation, the power-saving operation end Occasionally detected by the internal temperature detection means The higher the internal temperature, the lower the rotation speed of the internal fan until the predetermined time elapses after the compressor starts operating due to the end of the power saving operation, and the normal rotation speed of the internal fan is reduced. is an article cooling device according to claim to Rukoto longer the predetermined time of suppressing lower than the rotational speed at the time of the in-compartment fan operation.

  The article cooling apparatus having the above configuration uses an internal fan whose rotation speed is variable as the internal fan, and the operation control means is in a period from when the compressor starts operating due to the end of the power saving operation until a predetermined time elapses. Keep the rotation speed of the internal fan lower than the rotation speed during normal internal fan operation.

  Therefore, by the end of the power saving operation, compared to the case where the internal fan starts operating at the rotation speed at the time of normal operation in synchronization with the start of operation of the compressor, the time until the predetermined time elapses after the compressor starts operation The amount of air blown into the cabinet without being sufficiently cooled by the internal heat exchanger is small, and the air passing through the internal heat exchanger is equivalent to the amount of rotation of the internal fan kept low. Since the flow of the air is slow, it takes a long time for the air passing through the internal heat exchanger to exchange heat with the internal heat exchanger, so that the internal heat exchanger can easily cool the air.

  Therefore, it is possible to suppress the occurrence of a problem that air that has not been cooled by the internal heat exchanger during the operation of the internal fan is blown into the internal compartment and warms the articles in the internal compartment.

  In addition, before operating the internal fan at the normal operation speed, the internal fan is operated while keeping the rotational speed low, so the supply amount to the internal heat exchanger gradually increases as the compressor starts operating. The liquid refrigerant that increases is able to exchange heat with the air around the internal heat exchanger via the internal heat exchanger, and is sufficient for the internal heat exchanger after a predetermined time has elapsed since the compressor started operation. When a sufficient amount of liquid refrigerant is supplied, the internal fan is operated at the rotation speed during normal operation, so that the sufficient amount of liquid refrigerant is also stored in the internal storage via the internal heat exchanger. It will be possible to exchange heat with the air around the heat exchanger.

  Therefore, it is possible to prevent the liquid refrigerant that cannot be evaporated in the internal heat exchanger from returning to the compressor and shortening the life of the compressor.

In general, the higher the internal temperature at the end of the power saving operation, the longer it takes for the internal heat exchanger to reach a sufficiently low temperature, and the liquid refrigerant tends to evaporate in the internal heat exchanger.

  Therefore, the higher the internal temperature at the end of the power saving operation, the lower the number of rotations of the internal fan until the predetermined time elapses after the compressor starts operating due to the end of the power saving operation. By extending the predetermined time to keep the rotation speed lower than the rotation speed during normal fan operation, after the compressor has been stopped for a long time due to power saving operation, the internal fan is warmed by the operation of the internal fan. While suppressing the occurrence of defects, the effect of preventing the liquid refrigerant that does not evaporate in the internal heat exchanger from returning to the compressor and shortening the life of the compressor can be further enhanced.

In addition to the first invention, the second invention has an outside air temperature detecting means for detecting outside air temperature, and the outside air temperature detected by the outside air temperature detecting means at the end of the power saving operation is detected by the operation control means. The higher the power saving operation, the longer the predetermined time has elapsed since the compressor started operation.
The number of rotations of the internal fan until the upper limit is reduced, and the predetermined time is kept lower than the number of rotations during normal operation of the internal fan. And

  In general, the higher the outside temperature at the end of power saving operation, the higher the temperature inside the cabinet at the end of power saving operation, and the more difficult it is to cool the inside of the cabinet. It is considered that it takes time for the vessel to reach a sufficiently low temperature, and the liquid refrigerant easily evaporates in the internal heat exchanger.

  Therefore, the higher the outside air temperature at the end of the power saving operation, the lower the rotation speed of the internal fan until the predetermined time has elapsed since the compressor started operating due to the end of the power saving operation, and the rotation of the internal fan By increasing the specified time to keep the number lower than the number of rotations during normal fan operation, after the compressor has been stopped for a long time due to power-saving operation, the internal fan will warm up the items in the warehouse. The effect of preventing the liquid refrigerant that does not evaporate in the internal heat exchanger from returning to the compressor and shortening the life of the compressor can be further enhanced.

The third invention has compressor stop time measuring means for measuring the stop time of the compressor due to the power saving operation, in addition to the first invention, and the operation control means is configured to The longer the stop time of the compressor by the power saving operation measured by the compressor stop time measuring means, the longer the internal fan until the predetermined time elapses after the compressor starts operating due to the end of the power saving operation. And the predetermined time for keeping the rotational speed of the internal fan lower than the rotational speed during normal operation of the internal fan is lengthened.

  Generally, the longer the compressor stop time due to power saving operation, the more the temperature inside the cabinet at the end of power saving operation tends to rise closer to the outside air temperature. It is thought that it takes time for the heat exchanger to reach a sufficiently low temperature, and the liquid refrigerant is likely to evaporate in the internal heat exchanger.

  Therefore, the longer the compressor stop time due to power saving operation, the lower the number of rotations of the internal fan until the predetermined time elapses after the compressor starts operating due to the end of power saving operation. By extending the predetermined time to keep the rotation speed lower than the rotation speed during normal fan operation, after the compressor has been stopped for a long time due to power saving operation, the internal fan is warmed by the operation of the internal fan. While suppressing the occurrence of defects, the effect of preventing the liquid refrigerant that does not evaporate in the internal heat exchanger from returning to the compressor and shortening the life of the compressor can be further enhanced.

In addition to the 1st invention, the 4th invention has in-compartment heat exchanger temperature detection means which detects the temperature of the in-compartment heat exchanger, and when the operation control means ends the power-saving operation, The higher the temperature of the internal heat exchanger detected by the internal heat exchanger temperature detection means, the higher the internal fan until the predetermined time elapses after the compressor starts operating due to the end of the power saving operation. And the predetermined time for keeping the rotational speed of the internal fan lower than the rotational speed during normal operation of the internal fan is lengthened.

  Generally, the higher the temperature of the internal heat exchanger at the end of the power saving operation, the higher the internal temperature at the end of the power saving operation, and the more difficult it is to cool the internal storage. It is considered that the higher the temperature, the longer it takes for the internal heat exchanger to reach a sufficiently low temperature, and the easier the liquid refrigerant evaporates in the internal heat exchanger.

Therefore, the higher the temperature of the internal heat exchanger at the end of the power saving operation, the lower the rotation speed of the internal fan until the predetermined time elapses after the compressor starts operating due to the end of the power saving operation, By extending the specified time to keep the rotation speed of the internal fan lower than the rotation speed during normal internal fan operation, after the compressor has been stopped for a long time due to power saving operation, The effect of preventing the liquid refrigerant that does not evaporate in the internal heat exchanger from returning to the compressor and shortening the life of the compressor can be further enhanced while suppressing the occurrence of the problem of warming the compressor.

The fifth invention is characterized in that, in particular, in the first to fourth inventions, the operation control means increases the rotational speed of the internal fan after the power saving operation in a stepwise manner.

  In general, liquid refrigerant is not supplied to the internal heat exchanger for a while after the start of operation of the compressor after the compressor has been stopped for a long time due to power saving operation, and the internal heat exchanger gradually increases as time elapses. The supply amount of the liquid refrigerant to the storage chamber increases, and the cooling capacity of the internal heat exchanger increases so as to be proportional to the supply amount of the liquid refrigerant to the internal heat exchanger.

  Therefore, by increasing the number of rotations of the internal fan after the power saving operation in stages, after the compressor has been stopped for a long time due to the power saving operation, there is a problem that the internal fan is warmed by the operation of the internal fan. The effect of preventing the liquid refrigerant that cannot be evaporated in the internal heat exchanger from returning to the compressor and shortening the life of the compressor can be further enhanced.

In a sixth aspect of the invention, particularly in the first to fifth aspects of the invention, the operation control means is configured such that the operation start of the internal fan after completion of the power saving operation is shorter than the predetermined time than the operation start of the compressor. It is characterized by delaying by a predetermined delay time.

  In general, liquid refrigerant is not supplied to the internal heat exchanger for a while after the start of operation of the compressor after the compressor has been stopped for a long time due to power saving operation, and the internal heat exchanger gradually increases as time elapses. The supply amount of the liquid refrigerant to the storage chamber increases, and the cooling capacity of the internal heat exchanger increases so as to be proportional to the supply amount of the liquid refrigerant to the internal heat exchanger.

  For this reason, liquid refrigerant that does not evaporate in the internal heat exchanger is compressed even if the internal fan is stopped as long as almost no liquid refrigerant is supplied to the internal heat exchanger immediately after the compressor starts operating. There is no risk of returning to the machine and shortening the life of the compressor.

  In addition, if the start of the operation of the internal fan after the end of the power saving operation is delayed by a predetermined delay time shorter than the predetermined time from the start of the operation of the compressor, the air not cooled by the internal heat exchanger immediately after the end of the power saving operation The temperature of the internal heat exchanger can be lowered faster than when the internal fan is started in synchronization with the start of operation of the compressor, without warming the articles in the internal space by the flow.

  Also, the internal fan that has started operation with a predetermined delay time behind the compressor is lower than the rotation speed during normal internal fan operation until the predetermined time has elapsed since the compressor started operation. Since it suppresses, it has the same effect as the 6th invention which increases the number of rotations of the fan in a warehouse after the end of power saving operation in steps.

Therefore, by properly setting the delay time, after suppressing the compressor for a long time due to power saving operation, in the internal heat exchanger while suppressing the occurrence of the problem of warming the items in the storage by the operation of the internal fan The effect of preventing the liquid refrigerant that does not evaporate from returning to the compressor and shortening the life of the compressor can be enhanced as compared with the fifth invention.

The seventh invention is characterized in that, in particular, in the first to sixth inventions, the operation control means forcibly operates the compressor until a predetermined condition is satisfied after completion of the power saving operation.

  As a result, it is possible to quickly cool the inside of the warehouse and the articles in the warehouse whose temperature has risen due to the compressor being stopped for a long time due to power saving operation, and the temperature distribution in the warehouse is not uniform or is relatively cooled in the warehouse. Even when there are difficult articles, the inside and the inside articles can be quickly and sufficiently cooled. In particular, when the article is a food, the quality can be maintained by a sufficient cooling operation after the power saving operation.

In an eighth aspect of the present invention, in particular, in the first to seventh aspects of the present invention, an inverter compressor having a variable rotation speed is used as the compressor, and the operation control unit is configured in advance until a predetermined condition is satisfied after the power saving operation is completed. It is characterized by operating at a set speed.

  As a result, the compressor can be operated for a long time by saving power by appropriately setting a preset rotation speed so that a cooling capacity equal to or higher than that in the case of forcibly and continuously operating a constant speed compressor can be obtained. It is possible to quickly cool the articles in the warehouse and the warehouse whose temperature has risen due to the stop, and even if the temperature distribution in the warehouse is uneven or there are articles that are relatively difficult to cool in the warehouse, Articles in the cabinet can be quickly and sufficiently cooled, and particularly when the article is a food product, the quality can be maintained by a sufficient cooling operation after the power saving operation.

A ninth invention is characterized in that, in the first to eighth inventions, there are a plurality of interiors, and each of the plurality of interiors includes the interior heat exchanger and the interior fan. Yes, even if there are a plurality of warehouses, and each of the plurality of warehouses has the internal heat exchanger and the internal fan, the length of the compressor by power saving operation, considering each of the plurality of warehouses After stopping the operation, liquid refrigerant that does not evaporate in the internal heat exchanger returns to the compressor and does not shorten the life of the compressor, while suppressing the occurrence of problems that warm the internal items due to operation of the internal fan. Can be.

A tenth aspect of the invention is a vending machine including the article cooling device according to the first to ninth aspects of the invention. After the compressor has been stopped for a long time by power saving operation, the goods sold in the warehouse are operated by operating the internal fan. It is possible to prevent liquid refrigerant that does not evaporate in the internal heat exchanger from returning to the compressor and shorten the life of the compressor while suppressing the occurrence of problems that cause warming. Practical on the machine.

  Embodiments of an article cooling apparatus and a vending machine including the same according to the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram showing an internal structure of a main body of a vending machine provided with an article cooling apparatus according to Embodiment 1 of the present invention, FIG. 2 is a configuration diagram of a refrigeration cycle of the vending machine according to the embodiment, and FIG. Is a block diagram showing the control system of the vending machine of the embodiment, FIG. 4 shows the relationship between the operating state of the compressor after the power saving operation of the vending machine of the embodiment and the rotation speed of each fan in the cabinet FIG. 5 is a flowchart showing the control after detecting the end of the power saving operation by the operation control means of the vending machine of the embodiment.

  FIG. 6 is a flowchart showing another example of the control after detecting the end of the power saving operation by the operation control unit of the vending machine of the embodiment, and FIG. 7 is the operation control unit of the vending machine of the embodiment. FIG. 8 is a flowchart showing still another example of the control after detecting the end of the power saving operation. FIG. 8 is another example of the control after detecting the end of the power saving operation by the operation control means of the vending machine of the embodiment. It is a flowchart which shows one example.

As shown in FIG. 1, a vending machine 2 provided with the article cooling device in Embodiment 1 of the present invention.
1 includes a left warehouse A, a middle warehouse B, and a right warehouse C partitioned right and left by a heat insulating partition wall 22 and has product storage columns 23A, 23B, and 23C for storing products to be sold respectively. The product storage columns 23A, 23B, and 23C have internal column temperature sensors 41A, 41B, and 41C that measure the temperature in the column (internal temperature), respectively.

  The vending machine 21 includes an outside temperature sensor 100 for detecting the ambient temperature of the vending machine 21, a controller 27 for controlling the entire vending machine, a cooling device such as a compressor, a product discharge mechanism, and the like. A built-in mechanism 26 is provided.

  As shown in FIG. 2, for the left warehouse A, the warehouse heat exchanger 51A that cools or warms the air in the left warehouse A, the warehouse fan 61A that circulates the air in the left warehouse A, the left The heater 62A that heats the interior A other than in the heat pump operation, the capillary tube 93A that squeezes and expands the liquid refrigerant in the refrigeration cycle, and the internal heat exchanger 51A serve as an evaporator during cooling and serve as a condenser during heating during the heat pump operation. A four-way valve 92 for switching the refrigerant flow path of the refrigeration cycle, an inverter compressor 71A for the refrigeration cycle for the left warehouse A, and an internal heat exchanger temperature sensor 101A for detecting the temperature of the internal heat exchanger 51A are provided. ing.

  Further, for the inside B, the inside heat exchanger 51B that cools the air inside the inside B, the inside fan 61B that circulates the air inside the inside B, and a heater that heats the inside B 62B, capillary tube 93B that squeezes and expands the liquid refrigerant in the refrigeration cycle, three-way valve 94 for switching whether or not the refrigerant flows through the internal heat exchanger 51B via the capillary tube 93B, the internal chamber B, and the right internal chamber C An internal heat exchanger temperature sensor 101B for detecting the temperature of the constant speed compressor 71B and the internal heat exchanger 51B of the combined refrigeration cycle is provided.

  For the right warehouse C, the internal heat exchanger 51C that cools the air in the right warehouse C, the internal fan 61C that circulates the air in the right warehouse C, and the three-way valve 94 to the internal heat exchanger. Capillary tube 93C that squeezes and expands the liquid refrigerant flowing into the internal heat exchanger 51C without passing through 51B, the constant-speed compressor 71B of the refrigeration cycle that is used as both the internal B and the right internal C, and the internal heat exchanger An internal heat exchanger temperature sensor 101C for detecting the temperature of 51C is provided.

  The mechanism unit 26 (a machine room outside the warehouse) is provided with an outside heat exchanger 81 and an outside fan 82 for blowing air to the outside heat exchanger 81. The external heat exchanger 81 is a combination of an external heat exchanger for the refrigeration cycle for the left internal A having the inverter compressor 71A, and an internal B and the right internal C having the constant speed compressor 71B. The refrigeration cycle external heat exchanger is configured integrally.

  Note that the refrigeration cycle for the left-hand chamber A has a configuration in which the inverter compressor 71A, the four-way valve 92, the external heat exchanger 81, the capillary tube 93A, and the internal heat exchanger 51A are connected in an annular shape.

  When cooling the left chamber A, the high-temperature and high-pressure refrigerant discharged from the inverter compressor 71A is condensed by the external heat exchanger 81 via the four-way valve 92 and is depressurized by the capillary tube 93A. Then, it evaporates in the internal heat exchanger 51A and returns to the inverter compressor 71A via the four-way valve 92 again.

  Further, when the left chamber A is heated by a heat pump operation, the high-temperature and high-pressure refrigerant discharged from the inverter compressor 71A is condensed by the internal heat exchanger 51A via the four-way valve 92, and the capillary tube The pressure is reduced at 93A, evaporates in the external heat exchanger 81, and returns to the inverter compressor 71A via the four-way valve 92 again.

  In addition, in the refrigeration cycle for both the inner warehouse B and the right warehouse C, the constant speed compressor 71B, the external heat exchanger 81, the three-way valve 94, the capillary tube 93C, and the internal heat exchanger 51C are sequentially annular. Further, the refrigerant inlet side of the internal heat exchanger 51B is connected to the other outlet side of the three-way valve 94 via the capillary tube 93B, and the refrigerant outlet side of the internal heat exchanger 51B is connected to the capillary tube 93C. It is the structure connected to the refrigerant | coolant piping between 51C of internal heat exchangers.

  When cooling the inside B and the right C at the same time, the high-temperature and high-pressure refrigerant discharged from the constant speed compressor 71B condenses in the external heat exchanger 81, and the capillary tube 93B passes from the three-way valve 94. The refrigerant is depressurized by the capillary tube 93B, a part of the refrigerant evaporates in the internal heat exchanger 51B, and then the remaining liquid refrigerant evaporates in the internal heat exchanger 51C, and the constant speed compressor 71B Return to.

  In addition, when only the right compartment C is cooled out of the middle compartment B and the right compartment C, the high-temperature and high-pressure refrigerant discharged from the constant speed compressor 71B is condensed in the external heat exchanger 81, and the three-way It flows from the valve 94 to the capillary tube 93C side, is depressurized by the capillary tube 93C, is evaporated by the internal heat exchanger 51C, and returns to the constant speed compressor 71B.

  As shown in FIG. 3, the main control means 200 for controlling the vending machine 21 according to the present embodiment includes an input processing unit 102, an operation control means 103, an internal fan rotation speed setting means 104, and a power saving operation end detection means 105. The predetermined time setting means 106 and the compressor stop time measuring means 107 are configured.

  The input processing unit 102 reads the temperature data of the internal column temperature sensors 41A, 41B, and 41C, the outside air temperature sensor 100, and the internal heat exchanger temperature sensors 101A, 101B, and 101C.

  The operation control means 103 controls the operation of the inverter compressor 71A, the constant speed compressor 71B, and the internal fans 61A, 61B, 61C.

  The internal fan rotation speed setting means 104 starts the operation of the inverter compressor 71A or the constant speed compressor 71B upon completion of the power saving operation, and then starts the normal operation of the internal fans 61A, 61B, 61C. The rotational speeds of the fans 61A, 61B, 61C are set smaller (lower) than usual.

  The power saving operation end detection means 105 reaches a predetermined time (preset power saving operation end time, for example, 4:00 pm) during power saving operation (for example, peak cut in summer), or each column temperature sensor in each cabinet Power saving such as the temperature in the column (internal temperature) detected by 41A, 41B, 41C reaches a predetermined temperature (for example, a temperature that affects the value of the product or is higher than the temperature during normal product sales). It is detected that the power saving operation is completed when the condition for forcibly terminating the operation is satisfied.

  The predetermined time setting means 106 starts the operation of the inverter compressor 71A or the constant speed compressor 71B at the end of the power saving operation, and then sets at least one of the internal fans 61A, 61B, 61C to be smaller (normally lower). ) Set the operation time at the number of revolutions.

  The compressor stop time measuring means 107 is a timer for measuring the stop time of the inverter compressor 71A or the constant speed compressor 71B during the power saving operation.

  The operation and action of the vending machine 21 of the present embodiment configured as described above will be described below with reference to FIGS. 4 and 5.

  As shown in FIG. 4, during the power saving operation, the operation control means 103 does not perform the cooling operation, and stops the inverter compressor 71A, the constant speed compressor 71B, and the internal fans 61A, 61B, 61C.

  Then, the power saving operation end detection means 105 detects the end of the power saving operation (in the case of peak cut, the predetermined time (preset power saving operation end time) is reached, or the internal temperature reaches the predetermined temperature, etc.) If it is detected that the condition for forcibly terminating the power saving operation is satisfied (STEP 1 in FIG. 5), the operation control means 103 starts the operation of the inverter compressor 71A and the constant speed compressor 71B, and also performs inverter compression. Measurement of elapsed time from the start of operation of the machine 71A and the constant speed compressor 71B is started (STEP 2 in FIG. 5).

  At the same time, the input processing unit 102 checks (detects) the temperatures of the in-column temperature sensors 41A, 41B, 41C, which are the internal temperatures (STEP 2 in FIG. 5).

  When the internal temperature is higher in the order of left internal A, middle internal B, and right internal C, the internal fan rotation speed setting means 104 is in order of internal fan 61A, internal fan 61B, internal fan 61C. The rotation speed is set low, and the predetermined time setting means 106 operates the compressor (inverter compressor 71A, constant speed compressor 71B) by the end of the power saving operation in the order of the internal fan 61A, the internal fan 61B, and the internal fan 61C. The time from the start to the normal operation of each internal fan 61A, 61B, 61C is set longer.

  In the example of FIG. 4, the internal fan 61A having the highest internal temperature is lower than the normal rate at which the intermittent rate is 75%, and the lowest rotational speed among the internal fans 61A, 61B, 61C is 3 minutes. After continuing, it is set to increase to the normal operation speed.

  In addition, the internal fan 61B having the second highest internal temperature is lower than usual, which has an intermittent rate of 60%, and the internal fan 61A, 61B, 61C has the next lower rotation than the internal fan 61A. The number is set so as to increase to the number of revolutions of normal operation after continuing for 2 minutes.

  Further, the internal fan 61C having the lowest internal temperature is lower than the normal rate at which the intermittent rate is 50%, and the normal rotational speed of each internal fan 61A, 61B, 61C is continued for 1 minute. It is set to increase the number of revolutions of operation.

  The operation control means 103 performs normal operation from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of power saving operation until normal operation of the internal fans 61A, 61B, 61C is started. The internal fans 61A, 61B, 61C are operated at a rotational speed set lower than that of the hour (STEP 3 in FIG. 5).

  Then, the predetermined time set by the predetermined time setting means 106 from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation (the internal fan 61A is 3 minutes, the internal fan 61B is 2 minutes) When the internal fan 61C is 1 minute), STEP 4 in FIG. 5 is branched to the Yes side, and the operation control means 103 operates each internal fan 61A, 61B, 61C at the number of rotations during normal operation. (STEP 5 in FIG. 5).

As described above, in the present embodiment, the time from the end of the power saving operation to the start of the normal operation of each of the internal fans 61A, 61B, 61C is set according to the internal temperature immediately after the end of the power saving operation. Then, by setting the number of rotations of the internal fans 61A, 61B, and 61C to be smaller (lower) than that of the normal operation, the normal operation of the internal fans 61A, 61B, and 61C is started after the power saving operation is completed. Until then, the amount of liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C can be suppressed, and the liquid refrigerant can be prevented from returning to the inverter compressor 71A or the constant speed compressor 71B. The reliability of the machine 71A and the constant speed compressor 71B can be ensured.

  As described above, the article cooling apparatus used in the vending machine 21 according to the present embodiment constitutes a refrigeration cycle together with a compressor (inverter compressor 71A, constant speed compressor 71B), and functions as an evaporator during cooling operation. The internal heat exchangers 51A, 51B, 51C for cooling the air in the cabinet and the air cooled by the internal heat exchangers 51A, 51B, 51C circulate in the left warehouse A, the middle warehouse B, and the right warehouse C, respectively. To control the operation of the internal fans 61A, 61B, 61C, the compressor (inverter compressor 71A, constant speed compressor 71B), and the internal fans 61A, 61B, 61C with variable rotation speed. And control means 103.

  Then, the operation control means 103 stops the operation of the compressor (inverter compressor 71A, constant speed compressor 71B) and the internal fans 61A, 61B, 61C during the power saving operation, and ends the power saving operation (inverter compression). 71A and constant-speed compressor 71B) are started, and the compressors (inverter compressor 71A and constant-speed compressor 71B) are operated for the internal fans 61A, 61B, and 61C upon completion of the power saving operation. The rotation speed of each internal fan 61A, 61B, 61C is kept lower than the rotation speed during normal internal fan operation until a predetermined time elapses after the start.

  The article cooling apparatus having the above configuration uses the internal fans 61A, 61B, 61C whose rotation speeds are variable for the internal fans 61A, 61B, 61C, and the compressor (inverter compressor 71A, constant speed compression) at the end of the power saving operation. The operation control means 103 lowers the rotation speed of each of the internal fans 61A, 61B, 61C from the rotation speed during normal internal fan operation until the predetermined time elapses after the operation of the machine 71B). suppress.

  Therefore, when each of the internal fans 61A, 61B, 61C starts operation at the rotation speed during normal operation in synchronization with the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation. In comparison, since the compressors (inverter compressor 71A, constant speed compressor 71B) start operating and the predetermined time elapses, the number of rotations of the internal fans 61A, 61B, 61C is kept low. The amount of air that is not sufficiently cooled by the internal heat exchangers 51A, 51B, and 51C and is blown into the internal storage (the left internal A, the central internal B, and the right internal C) is reduced.

  Further, since the flow of air passing through the internal heat exchangers 51A, 51B, 51C is slow, the air passing through the internal heat exchangers 51A, 51B, 51C exchanges heat in the internal heat exchangers 51A, 51B, 51C. As a result, the air passing through the internal heat exchangers 51A, 51B, and 51C is easily cooled by the internal heat exchangers 51A, 51B, and 51C.

  Therefore, air that is not cooled by the internal heat exchangers 51A, 51B, and 51C in the operation of the internal fans 61A, 61B, and 61C enters the internal storage (the left internal A, the central internal B, and the right internal C). Generation | occurrence | production of the malfunction which is blown and heats the articles | goods (goods) in the store | warehouse | chamber (the left store | warehouse | chamber interior A, the middle store interior B, and the right store interior C) can be suppressed.

  Also, before operating the internal fans 61A, 61B, 61C at the rotational speed during normal operation, the internal fans 61A, 61B, 61C are operated while keeping the rotational speed low. The liquid refrigerant whose supply amount to the internal heat exchangers 51A, 51B, 51C gradually increases with the start of operation of the machine 71A and the constant speed compressor 71B) passes through the internal heat exchangers 51A, 51B, 51C. Heat can be exchanged with the air around the internal heat exchangers 51A, 51B, 51C.

Then, when a sufficient amount of liquid refrigerant is supplied to the internal heat exchangers 51A, 51B, 51C after a predetermined time has elapsed since the compressor (inverter compressor 71A, constant speed compressor 71B) started operation. Since each internal fan 61A, 61B, 61C is operated at the number of rotations during normal operation, the liquid refrigerant having a sufficient supply amount is also stored in the internal via the internal heat exchangers 51A, 51B, 51C. Heat exchange with the air around the heat exchangers 51A, 51B, 51C is possible.

  Therefore, the liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C returns to the compressor (inverter compressor 71A, constant speed compressor 71B), and the compressor (inverter compressor 71A, constant speed compressor 71B). ) Is not shortened.

  In addition, the article cooling apparatus used in the vending machine according to the present embodiment has an internal temperature detecting means for detecting the internal temperature (internal column temperature sensor 41A for detecting the internal temperature of the left internal A, The internal column temperature sensor 41B for detecting the internal temperature of the internal chamber B and the internal column temperature sensor 41C for detecting the internal temperature of the right internal chamber C are provided.

  Then, the higher the internal temperature detected by the operation control means 103 by the internal temperature detection means (internal column temperature sensors 41A, 41B, 41C) at the end of the power saving operation, the more the compressor (inverter compressor) 71A, the constant-speed compressor 71B) reduces the rotational speed of each internal fan 61A, 61B, 61C from the start of operation until a predetermined time elapses, and the internal fans 61A, 61B, 61C. The predetermined time for keeping the rotational speed lower than the rotational speed during normal fan operation is lengthened.

  In general, the higher the internal temperature at the end of the power saving operation, the longer it takes for the internal heat exchangers 51A, 51B, 51C to reach a sufficiently low temperature, and the liquid refrigerant becomes the internal heat exchangers 51A, 51B, 51C. Evaporates easily.

  Therefore, the higher the internal temperature at the end of the power saving operation, the higher the internal temperature from when the compressor (inverter compressor 71A, constant speed compressor 71B) starts operation by the end of the power saving operation until a predetermined time elapses. By reducing the number of rotations of the fans 61A, 61B, and 61C, and increasing the predetermined time during which the number of rotations of the internal fans 61A, 61B, and 61C is lower than the number of rotations during normal internal fan operation, power saving is achieved. After operation of the compressors (inverter compressor 71A, constant speed compressor 71B) for a long time, the internal fans 61A, 61B, 61C are operated in the warehouse (left compartment A, middle compartment B, right compartment) C) Liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C while suppressing the occurrence of problems that warm the article (product) of C) is a compressor (inverter compressor 71A, constant speed compressor). 1B) to return the compressor (inverter compressor 71A, the effect to prevent shortening the constant speed compressor 71B) of the life it can be further enhanced.

  In addition, the article cooling apparatus used in the vending machine 21 of the present embodiment has a plurality (three) in the warehouse (A in the left warehouse, B in the middle warehouse, and C in the right warehouse). Is an internal heat exchanger 51A and an internal fan 61A, an internal B is an internal heat exchanger 51B and an internal fan 61B, a right internal C is an internal heat exchanger 51C and an internal fan 61C, and so on. In addition, each of a plurality (three) of the warehouses (the left warehouse A, the middle warehouse B, and the right warehouse C) has the internal heat exchangers 51A, 51B, 51C and the internal fans 61A, 61B, 61C. .

Therefore, there are a plurality (three) of warehouses (left warehouse A, middle warehouse B, right warehouse C), and plural (three) warehouses (left warehouse A, middle warehouse B, right warehouse interior). Even if each of C) has in-compartment heat exchangers 51A, 51B, 51C and in-compartment fans 61A, 61B, 61C, a plurality of (three) interiors (left compartment A, middle compartment B, right compartment) In consideration of each of C), after the compressor (inverter compressor 71A, constant speed compressor 71B) is stopped for a long time by power saving operation, the internal fans 61A, 61B, 61C are operated in the warehouse (left warehouse). The liquid refrigerant that does not completely evaporate in the internal heat exchangers 51A, 51B, 51C is suppressed by the compressor (inside A, in the internal compartment B, in the right internal compartment C) while suppressing the occurrence of problems that warm the articles (commodities). Return to inverter compressor 71A, constant speed compressor 71B), compressor (inverter compressor 71A, constant speed pressure) It is possible to prevent shortening the life of the machine 71B).

  Further, the article cooling apparatus used in the vending machine 21 of the present embodiment has an inverter compressor 71A, a four-way valve 92, an external heat exchanger 81, and a capillary tube. It is a refrigeration cycle only for left warehouse A of the composition where 93A and warehouse heat exchanger 51A were connected circularly.

  Therefore, before the preset power saving operation end time, the temperature in the left compartment A (internal temperature) detected by the internal column temperature sensor 41A affects the predetermined temperature (for example, the value of the product). When the conditions for forcibly ending the power saving operation of A in the left warehouse, such as reaching a temperature higher than the temperature at the time of normal product sales, are met, the power saving operation is performed for A in the left warehouse at that timing. And the timing of the end of the power saving operation in the left warehouse A can be shifted from the timing of the end of the power saving operation in the middle warehouse B or the right warehouse C.

  Further, the article cooling apparatus used in the vending machine 21 according to the present embodiment is configured such that when the refrigerant flows from the three-way valve 94 to the internal heat exchanger 51C via the capillary tube 93C, the internal storage B Of the right warehouse C, only the right warehouse C can be cooled.

  Therefore, when the operation of the constant speed compressor 71B is started by the end of the power saving operation, the three-way valve 94 is set to such a refrigerant flow path, and the power saving of the inside B, which is relatively less affected by the outside air temperature, is performed. The timing of the end of operation is delayed from the timing of the end of the power saving operation in the right warehouse C, energy saving is achieved as the operation start of the internal fan 61B is delayed, and the liquid flowing to the internal heat exchanger 51C in the right warehouse C The cooling capacity of the internal heat exchanger 51C can be increased by increasing the ratio of the refrigerant, so that the right internal C can be cooled quickly.

  Further, when the three-way valve 94 is switched so that the liquid refrigerant flows through the three-way valve 94 and then the refrigerant also flows through the internal heat exchanger 51B of the internal storage B, the refrigerant flows through the internal heat exchanger 51B. The time from the start until the internal heat exchanger 51B is sufficiently cooled by evaporation of the refrigerant can be shortened.

  In addition, after switching the three-way valve 94 so that the refrigerant also flows in the internal heat exchanger 51B of the internal compartment B, the refrigerant after the heat exchange in the internal heat exchanger 51B of the internal compartment B is on the right. Since the refrigerant flows in the internal heat exchanger 51C in the internal chamber C (the liquid refrigerant that has not evaporated in the internal heat exchanger 51B in the internal chamber B flows into the internal heat exchanger 51C in the right internal chamber C), Since the cooling capacity of the heat exchanger 51C is lowered, before switching the three-way valve 94 so that the refrigerant also flows into the internal heat exchanger 51B of the internal storage B, the internal heat exchanger 51C It is desirable to keep it sufficiently cooled.

  Note that after the power saving operation is completed, the operation control means 103 forcibly operates the compressor (inverter compressor 71A, constant speed compressor 71B) until the predetermined condition is satisfied, and after the predetermined condition is satisfied, the compression is performed. The machine (inverter compressor 71A, constant speed compressor 71B) may be returned to normal operation.

In this case, the interior of the warehouse (left compartment A, middle compartment B, right compartment C) and the interior where the temperature has increased due to a long-time stoppage of the compressor (inverter compressor 71A, constant speed compressor 71B) due to power saving operation Articles (products) in (left warehouse A, middle warehouse B, right warehouse C) can be cooled quickly, and the temperature distribution in the warehouse (left warehouse A, middle warehouse B, right warehouse C) Even if there is a non-uniformity or there is an article (product) that is relatively difficult to cool in the warehouse (left warehouse A, middle warehouse B, right warehouse C), the warehouse (left warehouse A, middle The goods (commodities) in the warehouse B, the right warehouse C) and the warehouse (the left warehouse A, the middle warehouse B, the right warehouse C) can be quickly and sufficiently cooled. In this case, the quality can be maintained by sufficient cooling operation after the power saving operation.

  Note that after the power saving operation is completed, the operation control unit 103 forcibly operates the inverter compressor 71A at a preset rotation speed until a predetermined condition is satisfied, and after the predetermined condition is satisfied, normal inverter compression is performed. You may make it return to the driving | operation of the machine 71A.

  In this case, the length of the compressor by the power saving operation is set by appropriately setting a preset rotation speed so that a cooling capacity equal to or higher than that in the case where the constant speed compressor 71B is forcibly continuously operated can be obtained. The goods (products) in the left warehouse A and the left warehouse A that have risen in temperature due to the time stop can be cooled quickly, and the temperature distribution in the left warehouse A is non-uniform, or the left warehouse A is relatively cooled. Even if there is an article (product) that is difficult to be done, the left warehouse A and the article (product) in the left warehouse A can be quickly and sufficiently cooled, especially when the article is food (including beverages). Quality can be maintained with sufficient cooling operation.

  In the present embodiment, the article cooling apparatus is applied to a vending machine. In this case, after the compressors (inverter compressor 71A, constant speed compressor 71B) by power saving operation are stopped for a long time, While suppressing the occurrence of problems that warm the sales products such as canned beverages and PET bottle beverages in the left warehouse A, the middle warehouse B, the right warehouse C by the operation of the internal fans 61A, 61B, 61C, Liquid refrigerant that does not evaporate in the exchangers 51A, 51B, 51C returns to the compressor (inverter compressor 71A, constant speed compressor 71B) to shorten the life of the compressor (inverter compressor 71A, constant speed compressor 71B). This is particularly practical in beverage vending machines that perform power-saving operation.

  Instead of the inside temperature detected at the end of the power saving operation (or in addition to the inside temperature detected at the end of the power saving operation), as shown in FIG. Based on the outside air temperature detected by the means), the rotation speed of each of the internal fans 61A, 61B, 61C from when the compressors 71A, 71B start operation by the end of the power saving operation until a predetermined time elapses, You may set the predetermined time which keeps the rotation speed of each fan 61A, 61B, 61C lower than the rotation speed at the time of normal operation.

  In this case, as shown in FIG. 6, first, the power saving operation end detection means 105 detects the end of the power saving operation (in the case of peak cut, it reaches a predetermined time (preset power saving operation end time) or If it is detected that a condition for forcibly ending the power saving operation such as the internal temperature reaching a predetermined temperature is detected (STEP 1 in FIG. 6), the operation control means 103 is connected to the inverter compressor 71A and the constant speed compression. The operation of the machine 71B is started, and the measurement of the elapsed time from the start of the operation of the inverter compressor 71A and the constant speed compressor 71B is started (STEP 2 in FIG. 6).

  At the same time, the input processing unit 102 confirms (detects) the measured temperature (detected temperature) of the outside air temperature sensor 100 (outside air temperature detecting means) (STEP 2 in FIG. 6).

  Then, the higher the outside air temperature measured (detected) by the outside air temperature sensor 100 (outside air temperature detecting means) at the end of the power saving operation by the internal fan rotation speed setting means 104, the more the compressor (inverter compressor 71A, The rotation speed of each internal fan 61A, 61B, 61C from the start of operation of the constant speed compressor 71B) until a predetermined time elapses is set low, and the internal fan is set by the predetermined time setting means 106. Each warehouse from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation to keep the rotational speed of 61A, 61B, 61C lower than the rotational speed during normal fan operation. (Time until normal operation of the inner fans 61A, 61B, 61C) is set longer (STEP 3 in FIG. 6).

And the operation control means 103 is the compressor (inverter compressor 71A by the end of power saving operation).
The internal fans 61A, 61B, 61C are operated at the set rotational speed from the start of the operation of the constant speed compressor 71B) until the normal operation of the internal fans 61A, 61B, 61C is started (FIG. 6). STEP 3).

  Then, if a predetermined time set by the predetermined time setting means 106 has elapsed from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation, STEP4 in FIG. Proceed to In the next STEP 5, the operation control means 103 operates the internal fans 61A, 61B, 61C at the number of rotations during normal operation.

  In addition, as in the present embodiment, if there is a plurality of interiors and an article cooling device having an interior heat exchanger and an interior fan in each of the plurality of interiors, the interior temperature detected at the end of the power saving operation Instead of the above, as shown in FIG. 6, a predetermined time has elapsed since the compressor started operating due to the end of the power saving operation based on the outside air temperature detected by the outside air temperature sensor 100 (outside air temperature detecting means) at the end of the power saving operation. In the case of setting a predetermined time during which the rotational speed of each internal fan 61A, 61B, 61C and the rotational speed of each internal fan 61A, 61B, 61C is kept lower than the rotational speed during normal operation, The number of rotations of each internal fan 61A, 61B, 61C before returning to normal operation and a predetermined time during which the rotational speed of each internal fan 61A, 61B, 61C is kept lower than the number of rotations during normal operation are Inner fans 61A, 61B Not the same at 61C, in the left chamber A, the middle chamber B, the right-compartment C condition by considering the internal fan 61A of, 61B, it is desirable to set individually for each 61C.

  As described above, in another example of the present embodiment (example shown in FIG. 6), each of the internal fans 61A, 61B, 61C after the power-saving operation is finished according to the outside air temperature immediately after the power-saving operation is finished. The time until the normal operation is started is set, and the fan speeds of the internal fans 61A, 61B, 61C during that time are set smaller (lower) than the normal operation, so that the internal fans after the power saving operation ends. Until the normal operation of 61A, 61B, 61C is started, the amount of liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C is suppressed, and the liquid refrigerant is transferred to the inverter compressor 71A and the constant speed compressor 71B. Liquid return can be prevented, and the reliability of the inverter compressor 71A and the constant speed compressor 71B can be ensured.

  In the example shown in FIG. 6, the outside air temperature sensor 100 (outside air temperature detecting means) for measuring (detecting) the outside air temperature is provided, and the operation control means 103 is operated by the outside air temperature sensor 100 (outside air temperature detecting means) at the end of the power saving operation. As the detected outside air temperature is higher, the internal fans 61A, 61B, 61C from when the compressor (inverter compressor 71A, constant speed compressor 71B) starts operation due to the end of the power saving operation until a predetermined time elapses. And a predetermined time for keeping the rotational speed of each of the internal fans 61A, 61B, 61C lower than the rotational speed during normal internal fan operation is lengthened.

  Generally, the higher the outside air temperature at the end of power saving operation, the higher the inside temperature of left warehouse A, middle warehouse B, and right warehouse C at the end of power saving operation, left warehouse A, middle warehouse B, right Since the cooling of the inside C tends to be difficult, the higher the outside air temperature at the end of the power saving operation, the longer it takes for the inside heat exchangers 51A, 51B, 51C to be sufficiently low, and the liquid refrigerant is stored in the inside. It is considered that the internal heat exchangers 51A, 51B, 51C are likely to evaporate.

Therefore, as the outside air temperature at the end of the power saving operation is higher, each internal fan until the predetermined time elapses after the compressor (inverter compressor 71A, constant speed compressor 71B) starts operating due to the end of the power saving operation. By reducing the rotational speed of 61A, 61B, 61C and increasing the predetermined time to keep the rotational speed of each internal fan 61A, 61B, 61C lower than the rotational speed during normal internal fan operation, After the compressors (inverter compressor 71A, constant speed compressor 71B) are stopped for a long time, the products in the left warehouse A, the middle warehouse B, and the right warehouse C are operated by the operation of the fans 61A, 61B, 61C in each warehouse ( The liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C is supplied to the compressor (inverter compressor 71A, constant speed compressor 71B) while suppressing the occurrence of problems that warm the product). What compressor (inverter compressor 71A, a constant-speed compressor 71B) effective to prevent shortening the life it can be enhanced.

  Further, instead of the internal temperature detected at the end of the power saving operation (or in addition to the internal temperature detected at the end of the power saving operation), as shown in FIG. Based on the measured stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the power saving operation, the compressor (inverter compressor 71A, constant speed compressor 71B) starts operating when the power saving operation ends. Is set to a predetermined time for keeping the rotational speeds of the internal fans 61A, 61B, 61C and the rotational speeds of the internal fans 61A, 61B, 61C lower than the rotational speeds during normal operation. It doesn't matter.

  In this case, as shown in FIG. 7, the operation of the compressor (inverter compressor 71A, constant speed compressor 71B) and the internal fans 61A, 61B, 61C is stopped simultaneously with the start of the power saving operation. Then, measurement of the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) is started by the compressor stop time measuring means 107 (STEP 1 in FIG. 7).

  Then, the power saving operation end detection means 105 detects the end of the power saving operation (in the case of peak cut, the predetermined time (preset power saving operation end time) is reached, or the internal temperature reaches the predetermined temperature, etc.) If it is detected that the condition for forcibly terminating the power saving operation is detected), STEP2 in FIG. 7 is branched to the Yes side and the process proceeds to STEP3.

  In the next STEP 3, the operation control means 103 starts the operation of the inverter compressor 71A and the constant speed compressor 71B, and measures the elapsed time from the start of the operation of the inverter compressor 71A and the constant speed compressor 71B. Start. Further, the compressor stop time measuring means 107 measures (detects) the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) in the power saving operation.

  Then, in the next STEP 4, the compressor (inverter compressor 71A, constant speed compressor 71B) measured (detected) by the compressor stop time measuring means 107 at the end of the power saving operation by the internal fan rotation speed setting means 104 is stopped. The longer the time, the rotation speed of each of the internal fans 61A, 61B, 61C from the start of the operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation until a predetermined time elapses. Is set low, and the predetermined time setting means 106 keeps the rotational speed of each of the internal fans 61A, 61B, 61C lower than the rotational speed during normal internal fan operation (compressor ( Time from the start of operation of the inverter compressor 71A, constant speed compressor 71B) until normal operation of the internal fans 61A, 61B, 61C) Long to set up.

  The operation control means 103 is set from the start of the operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation until the normal operation of the internal fans 61A, 61B, 61C is started. The internal fans 61A, 61B, 61C are operated at the determined rotational speed (STEP 4 in FIG. 7).

  Then, if a predetermined time set by the predetermined time setting means 106 has elapsed from the start of the operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation, STEP5 in FIG. Proceed to In the next STEP 6, the operation control means 103 operates the internal fans 61A, 61B, 61C at the number of rotations during normal operation.

In addition, as in the present embodiment, if there is a plurality of interiors and an article cooling device having an interior heat exchanger and an interior fan in each of the plurality of interiors, the interior temperature detected at the end of the power saving operation 7 based on the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) by the power saving operation measured (detected) by the compressor stop time measuring means 107 at the end of the power saving operation, as shown in FIG. In addition, the number of rotations of the internal fans 61A, 61B, 61C and the number of rotations of the internal fans 61A, 61B, 61C from when the compressor starts operating due to the end of the power saving operation until the predetermined time elapses. When setting a predetermined time to be kept lower than the rotation speed during normal operation, the rotation speed before returning to normal operation of each internal fan 61A, 61B, 61C and the rotation speed of each internal fan 61A, 61B, 61C. The normal luck The predetermined time to be kept lower than the rotational speed of the hour is not made the same for each of the internal fans 61A, 61B, 61C, and the inside of the internal compartment is considered in consideration of the conditions of the left internal compartment A, the central internal compartment B and the right internal compartment C It is desirable to set each fan 61A, 61B, 61C individually.

  In the article cooling apparatus used in the vending machine 21 of the present embodiment, the refrigeration cycle for cooling the left warehouse A is a dedicated refrigeration cycle for the left warehouse A using the inverter compressor 71A. Since the refrigeration cycle for cooling the inside B and the right C is a refrigeration cycle for both the inside B and the right C using the constant speed compressor 71B, a preset power saving operation is performed. Before reaching the end time, each chamber has its own power-saving operation, such as the chamber temperature reaching a predetermined temperature (for example, a temperature that affects the value of the product or higher than the temperature at the time of normal product sales). When the condition for forcibly ending is satisfied, the timing of the power saving operation in the left warehouse A may be shifted from the timing of the power saving operation in the middle warehouse B or the right warehouse C.

  In that case, the timing when the inverter compressor 71A starts operation at the end of the power saving operation in the left warehouse A and the timing when the constant speed compressor 71B starts operation after the power saving operation in the middle warehouse B or the right warehouse C ends. However, in this case, the inverter is stopped by the end of the power saving operation based on the stop time of the inverter compressor 71A by the power saving operation measured (detected) by the compressor stop time measuring means 107 at the end of the power saving operation of the left warehouse A. The number of rotations of the internal fan 61A between the start of operation of the compressor 71A and the elapse of a predetermined time and the predetermined time during which the rotational speed of the internal fan 61A is kept lower than the number of rotations during normal operation are set. .

  Similarly, based on the stop time of the constant speed compressor 71B by the power saving operation measured (detected) by the compressor stop time measuring means 107 at the end of the power saving operation in the middle warehouse B and the right warehouse C, it is constant at the end of the power saving operation. The number of rotations of the internal fans 61B and 61C and the number of rotations of the internal fans 61B and 61C from when the high speed compressor 71B starts operation until a predetermined time elapses are kept lower than the number of rotations during normal operation. Set a predetermined time.

  As described above, in still another example of the present embodiment (example shown in FIG. 7), the power saving operation is performed according to the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) by the power saving operation. Is set until the normal operation of each internal fan 61A, 61B, 61C is started, and the rotational speed of each internal fan 61A, 61B, 61C during that period is set smaller (lower) than the normal operation. Thus, the amount of liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C is suppressed from the end of the power saving operation until the normal operation of the internal fans 61A, 61B, 61C starts. The liquid refrigerant can be prevented from returning to the inverter compressor 71A and the constant speed compressor 71B, and the reliability of the inverter compressor 71A and the constant speed compressor 71B can be ensured.

In the example shown in FIG. 7, it has the compressor stop time measuring means 107 which measures the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) by power saving operation, and the operation control means 103 ends power saving operation. Sometimes, the longer the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) by the power saving operation measured by the compressor stop time measuring means 107, the more the compressor (inverter compressor 71A, constant speed compression) by the end of the power saving operation. Machine 71B) reduces the rotational speed of each internal fan 61A, 61B, 61C from the start of operation until a predetermined time elapses, and sets the rotational speed of each internal fan 61A, 61B, 61C to normal. The predetermined time to be kept lower than the number of rotations during the internal fan operation is lengthened.

  Generally, the longer the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) due to power saving operation, the temperature inside the left warehouse A, the middle warehouse B, and the right warehouse C at the end of the power saving operation becomes Since it tends to rise to a temperature closer to the outside air temperature, the longer the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) by power saving operation, the more the internal heat exchangers 51A, 51B, 51C are sufficient. It is considered that it takes time to lower the temperature and the liquid refrigerant is easily evaporated in the internal heat exchangers 51A, 51B, and 51C.

  Therefore, the longer the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the power saving operation, the more the compressor (inverter compressor 71A, constant speed compressor 71B) starts operating due to the end of the power saving operation. The rotation speed of each of the internal fans 61A, 61B, 61C from the time until a predetermined time elapses is lowered, and the rotation speed of each of the internal fans 61A, 61B, 61C is set to be higher than the rotation speed during normal internal fan operation. By increasing the predetermined time to be kept low, after the compressor (inverter compressor 71A, constant speed compressor 71B) has been stopped for a long time due to power saving operation, the internal fans A, 61B, 61C are operated by the internal fans 61A, 61B, 61C. The liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, and 51C while suppressing the occurrence of problems that warm the articles (commodities) in the inner warehouse B and the right warehouse C. Compressor (inverter compressor 71A, a constant-speed compressor 71B) to return the compressor (inverter compressor 71A, a constant-speed compressor 71B) effective to prevent shortening the life can be enhanced.

  Further, instead of the internal temperature detected at the end of the power saving operation or in addition to the internal temperature detected at the end of the power saving operation, as shown in FIG. Based on the temperature of the internal heat exchangers 51A, 51B, 51C detected by the internal heat exchanger temperature sensors 101A, 101B, 101C), the compressor (inverter compressor 71A, constant speed compressor 71B) is terminated when the power saving operation is completed. The rotational speeds of the internal fans 61A, 61B, 61C and the rotational speeds of the internal fans 61A, 61B, 61C from the start of operation until the predetermined time elapses are higher than the rotational speeds during normal operation. You may set the predetermined time kept low.

  In this case, as shown in FIG. 8, first, the power saving operation end detection means 105 detects the end of the power saving operation (in the case of peak cut, it reaches a predetermined time (preset power saving operation end time) or If it is detected that the condition for forcibly ending the power saving operation such as the internal temperature reaching the predetermined temperature is detected (STEP 1 in FIG. 8), the operation control means 103 is connected to the inverter compressor 71A and the constant speed compression. The operation of the machine 71B is started, and the measurement of the elapsed time from the start of the operation of the inverter compressor 71A and the constant speed compressor 71B is started (STEP 2 in FIG. 8).

  At the same time, the input processing unit 102 confirms the temperatures of the internal heat exchangers 51A, 51B, and 51C measured (detected) by the internal heat exchanger temperature detection means (internal heat exchanger temperature sensors 101A, 101B, and 101C). (Detection) (STEP 2 in FIG. 8).

  And, the higher the temperature of the in-compartment heat exchangers 51A, 51B, 51C measured (detected) by the in-compartment heat exchanger temperature detection means (internal heat exchanger temperature sensors 101A, 101B, 101C) at the end of the power saving operation, While the compressor (inverter compressor 71A, constant speed compressor 71B) starts operation after the power saving operation ends, the rotation speed of each of the internal fans 61A, 61B, 61C is set low until a predetermined time elapses. The predetermined time setting means 106 keeps the rotational speed of each of the internal fans 61A, 61B, 61C lower than the rotational speed during normal internal fan operation (the compressor (inverter compressor 71A, The time from the start of operation of the constant speed compressor 71B) to the start of normal operation of the internal fans 61A, 61B, 61C is set longer (STEP 3 in FIG. 8).

  The operation control means 103 is set from the start of the operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation until the normal operation of the internal fans 61A, 61B, 61C is started. The internal fans 61A, 61B, 61C are operated at the determined rotational speed (STEP 3 in FIG. 8).

  Then, if a predetermined time set by the predetermined time setting means 106 has elapsed from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation, STEP4 in FIG. Proceed to In the next STEP 5, the operation control means 103 operates the internal fans 61A, 61B, 61C at the number of rotations during normal operation.

  As described above, in another example of the present embodiment (example shown in FIG. 8), the power saving operation is performed according to the temperatures of the in-compartment heat exchangers 51A, 51B, and 51C immediately after the power saving operation is completed. The time from the end to the normal operation of each internal fan 61A, 61B, 61C is set, and the rotational speed of each internal fan 61A, 61B, 61C during that period is set smaller (lower) than the normal operation. Thus, the amount of liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C is suppressed from the end of the power saving operation until the normal operation of the internal fans 61A, 61B, 61C is started. The refrigerant can be prevented from returning to the inverter compressor 71A and the constant speed compressor 71B, and the reliability of the inverter compressor 71A and the constant speed compressor 71B can be ensured.

  In the example shown in FIG. 8, the internal heat exchanger temperature detection means (internal heat exchanger temperature sensors 101A, 101B, 101C) for detecting the temperature of the internal heat exchangers 51A, 51B, 51C is provided, and operation control is performed. The higher the temperature of the in-compartment heat exchangers 51A, 51B, 51C detected by the in-compartment heat exchanger temperature detection means (in-container heat exchanger temperature sensors 101A, 101B, 101C) at the end of the power-saving operation, the more the means 103 saves power. When the compressor (inverter compressor 71A, constant speed compressor 71B) starts operation and the predetermined time elapses after the operation is finished, the rotation speed of each of the internal fans 61A, 61B, 61C is lowered, The predetermined time for keeping the rotational speed of the internal fans 61A, 61B, 61C lower than the rotational speed during normal internal fan operation is lengthened.

  In general, the higher the temperature of the internal heat exchangers 51A, 51B, 51C at the end of the power saving operation, the higher the internal temperature at the end of the power saving operation and the more difficult it is to cool the internal storage. The higher the temperature of the internal heat exchangers 51A, 51B, 51C, the longer it takes for the internal heat exchangers 51A, 51B, 51C to be sufficiently low in temperature, and the liquid refrigerant becomes the internal heat exchangers 51A, 51B. , 51C is likely to evaporate easily.

  Therefore, the higher the temperature of the internal heat exchangers 51A, 51B, 51C at the end of the power saving operation, the predetermined time after the compressor (inverter compressor 71A, constant speed compressor 71B) starts operating due to the end of the power saving operation. The rotational speeds of the internal fans 61A, 61B, 61C until the elapsed time are lowered, and the rotational speeds of the internal fans 61A, 61B, 61C are kept lower than the rotational speeds during normal internal fan operation. By extending the predetermined time, after the compressor (inverter compressor 71A, constant speed compressor 71B) has been stopped for a long time due to power saving operation, the operation of each of the internal fans 61A, 61B, 61C causes the left internal A and the internal storage. The liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C is suppressed by the compressor (inverter pressure) while suppressing the occurrence of problems that warm the articles (commodities) in the inner B and the right inner C. Machine 71A, a constant-speed compressor 71B) to return the compressor (inverter compressor 71A, the effect to prevent shortening the constant speed compressor 71B) of the life can be further enhanced.

(Embodiment 2)
FIG. 9 is a time chart showing the relationship between the operating state of the compressor after the power saving operation of the vending machine provided with the article cooling device according to Embodiment 2 of the present invention and the rotation speed of each internal fan.

  In the present embodiment, the interior of each refrigerator from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) to the normal operation of the fans 61A, 61B, 61C by the end of the power saving operation. The internal fan rotational speed setting means 104 for setting the rotational speeds of the fans 61A, 61B, 61C to be smaller (lower) than normal, sets a plurality of rotational speeds lower than that during normal operation for each of the internal fans 61A, 61B, 61C. In the first embodiment, the operation control means 103 gradually increases the rotational speeds of the internal fans 61A, 61B, 61C until the normal operation after the power saving operation ends as shown in FIG. Since the others are the same as those of the first embodiment, description thereof is omitted.

  The operation and action of the vending machine 21 of the present embodiment configured as described above will be described below with reference to FIG.

  As shown in FIG. 9, during the power saving operation, the operation control means 103 does not perform the cooling operation, and stops the inverter compressor 71A, the constant speed compressor 71B, and the internal fans 61A, 61B, 61C.

  Then, the power saving operation end detection means 105 detects the end of the power saving operation (in the case of peak cut, the predetermined time (preset power saving operation end time) is reached, or the internal temperature reaches the predetermined temperature, etc.) If it is detected that the condition for forcibly ending the power saving operation is satisfied), the operation control means 103 starts the operation of the inverter compressor 71A and the constant speed compressor 71B, and at the same time the inverter compressor 71A and the constant speed compression. The measurement of the elapsed time from the start of operation of the machine 71B is started.

  At the same time, the input processing unit 102 confirms (detects) the temperatures of the internal column temperature sensors 41A, 41B, and 41C, which are internal temperatures.

  When the internal temperature is higher in the order of left internal A, middle internal B, and right internal C, the internal fan rotation speed setting means 104 is in order of internal fan 61A, internal fan 61B, internal fan 61C. The number of revolutions is set low, and each of the first and second two is set, and the predetermined time setting means 106 is a compressor (inverter compressor) by the end of the power saving operation in the order of the internal fan 61A, the internal fan 61B, and the internal fan 61C. 71A, the constant speed compressor 71B) is set to a long time from the start of operation to the normal operation of the internal fans 61A, 61B, 61C.

  In the example of FIG. 9, the time from the start of the operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation to the normal operation of each of the internal fans 61A, 61B, 61C is the most internal 5 minutes is set for the internal fan 61A having the highest temperature, 4 minutes for the internal fan 61B having the second highest internal temperature, and 3 minutes for the internal fan 61C having the lowest internal temperature.

  For the internal fan 61A having the highest internal temperature, the intermittent rate is 75% lower than usual, and the lowest rotational speed among the internal fans 61A, 61B, 61C is the lowest. After continuing for 3 minutes, the intermittent rate is lower than normal, which is 60%, and the second lowest among the internal fans 61A, 61B, 61C is continued for the remaining 2 minutes. It is set so as to increase the rotation speed in normal operation.

In addition, the internal fan 61B having the second highest internal temperature is lower than the normal rate at which the intermittent rate is 60%, and the internal rotational speed of the internal fans 61A, 61B, 61C is the internal fan. After the second lowest rotation speed of 61A is continued for 2 minutes, the intermittent rate is lower than usual, which is 50%, and the second rotation speed among the internal fan 61A, 61B, 61C is the internal rotation of the internal fan 61A. Next, the rotation speed is set to be increased to the rotation speed of the normal operation after continuing the remaining low rotation speed for the remaining two minutes.

  Further, the internal fan 61C having the lowest internal temperature has a lower intermittent rate of 50% than usual, and the highest rotational speed among the internal fans 61A, 61B, 61C is the highest. After continuing for 1 minute, the intermittent rate is lower than usual, which is 40%, and among the fans 61A, 61B, 61C in the cabinet, the second highest rotational speed is continued for the remaining 2 minutes. It is set so as to increase the rotation speed in normal operation.

  The operation control means 103 performs normal operation from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of power saving operation until normal operation of the internal fans 61A, 61B, 61C is started. Each internal fan 61A, 61B, 61C is operated so that the rotational speed increases stepwise at a rotational speed set lower than the time.

  The predetermined time set by the predetermined time setting means 106 from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation (internal fan 61A is 5 minutes, internal fan 61B is 4 minutes) When the internal fan 61C has passed for 3 minutes), the operation control means 103 operates the internal fans 61A, 61B, 61C at the rotation speed during normal operation.

  As described above, in the present embodiment, the time from the end of the power saving operation to the start of the normal operation of each of the internal fans 61A, 61B, 61C is set according to the internal temperature immediately after the end of the power saving operation. In the meantime, the internal fans 61A, 61B, 61C are set to a lower (lower) rotational speed than the normal operation and the rotational speed is increased stepwise so that the internal fans after the power-saving operation is completed. Until the normal operation of 61A, 61B, 61C is started, the amount of liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C is suppressed, and the liquid refrigerant is transferred to the inverter compressor 71A and the constant speed compressor 71B. Liquid return can be prevented, and the reliability of the inverter compressor 71A and the constant speed compressor 71B can be ensured.

  In the present embodiment, the operation control means 103 is characterized in that the number of rotations of the internal fans 61A, 61B, 61C after the power saving operation is increased stepwise.

  In general, for a while from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) after a long stop of the compressor (inverter compressor 71A, constant speed compressor 71B) by power saving operation, The liquid refrigerant is not supplied to the internal heat exchangers 51A, 51B, and 51C, and the supply amount of the liquid refrigerant to the internal heat exchangers 51A, 51B, and 51C gradually increases as time elapses. The cooling capacity of the internal heat exchangers 51A, 51B, and 51C increases so as to be proportional to the amount of liquid refrigerant supplied to the heat exchangers 51A, 51B, and 51C.

  Therefore, after the power-saving operation, the compressors (inverter compressor 71A, constant speed compressor 71B) are stopped for a long time by increasing the rotational speed of the internal fans 61A, 61B, 61C in stages. The internal heat exchangers 51A, 51B while suppressing the occurrence of problems that warm the articles (products) in the left warehouse A, the middle warehouse B, and the right warehouse C during operation of the internal fans 61A, 61B, 61C. , 51C, the liquid refrigerant that does not evaporate returns to the compressor (inverter compressor 71A, constant speed compressor 71B) and prevents the life of the compressor (inverter compressor 71A, constant speed compressor 71B) from being shortened. Can be further enhanced.

In addition, instead of the internal temperature detected at the end of the power saving operation (or in addition to the internal temperature detected at the end of the power saving operation), the outside air temperature detected by the outside temperature sensor 100 (external temperature detecting means) at the end of the power saving operation. Or the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) by the power saving operation measured by the compressor stop time measuring means 107 at the end of the power saving operation, or the internal heat exchanger temperature at the end of the power saving operation Detection means (internal heat exchanger temperature sensor 10
1A, 101B, 101C) based on the temperature of the internal heat exchangers 51A, 51B, 51C detected by the compressor (inverter compressor 71A, constant speed compressor 71B) starting operation after the power saving operation is completed. The rotation speed of each internal fan 61A, 61B, 61C until the predetermined time elapses and the predetermined time for keeping the rotation speed of each internal fan 61A, 61B, 61C lower than the rotation speed during normal operation are set. It doesn't matter.

  Further, in this embodiment, after the operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation is started, the rotation speed during normal operation is set for each of the internal fans 61A, 61B, 61C. Although the rotational speed is increased in two stages at a lower rotational speed and then operated at the rotational speed of the normal operation, the rotational speed may be increased in three or more stages.

  Moreover, it is not necessary to make the number of stages to be increased by the internal fans 61A, 61B, 61C the same, and the internal fans 61A, 61B, 61C have a fast wind speed during normal operation or after the power saving operation is completed. However, the number of stages may be increased more than the others, although it takes a long time to keep the rotational speed before entering the normal operation.

(Embodiment 3)
FIG. 10 is a time chart showing the relationship between the operating state of the compressor after the power-saving operation of the vending machine equipped with the article cooling device according to Embodiment 3 of the present invention and the rotation speed of each internal fan, and FIG. It is a flowchart which shows the control after detecting completion | finish of a power saving operation by the operation control means of the vending machine of the form.

  In the present embodiment, the operation control means 103 starts the operation of the compressors (inverter compressor 71A, constant speed compressor 71B) by starting at least one operation of each of the internal fans 61A, 61B, 61C after the end of the power saving operation. The second embodiment is different from the first embodiment or the second embodiment in that it is delayed by a predetermined delay time shorter than the predetermined time, and the rest is the same as the first embodiment or the second embodiment, and the description thereof is omitted. To do.

  Specifically, based on the measured (detected) temperatures of the in-box column temperature sensors 41A, 41B, 41C when the power-saving operation end detection means 105 detects the end of the power-saving operation, B. For the internal fan 61A, the internal fan 61B, and the internal fan 61C, which have a relatively high internal temperature in B and the right internal C, the internal fan rotational speed setting means 104 determines the rotational speed first. Is set to 0 rotation, and the second is set to a predetermined rotation speed lower than the rotation speed during normal operation.

  Further, based on the measured (detected) temperatures of the internal column temperature sensors 41A, 41B, 41C when the power saving operation end detecting means 105 detects the end of the power saving operation, the predetermined time setting means 106 is set by the end of the power saving operation. Time (predetermined time) from the start of operation of the compressors (inverter compressor 71A, constant speed compressor 71B) to the normal operation of each internal fan 61A, 61B, 61C, left internal A, and internal internal B The delay time set shorter than the predetermined time during which the first zero rotation of the internal fan 61A, the internal fan 61B, and the internal fan 61C in the internal compartment C, which has a relatively high internal temperature, is continued. Set.

  The operation and action of the vending machine 21 of the present embodiment configured as described above will be described below with reference to FIGS. 10 and 11.

  As shown in FIG. 10, during the power saving operation, the operation control means 103 does not perform the cooling operation, and stops the inverter compressor 71A, the constant speed compressor 71B, and the internal fans 61A, 61B, 61C.

Then, the power saving operation end detection means 105 detects the end of the power saving operation (in the case of peak cut, the predetermined time (preset power saving operation end time) is reached, or the internal temperature reaches the predetermined temperature, etc.) If it is detected that the condition for forcibly ending the power saving operation is satisfied (STEP 1 in FIG. 11), the operation control means 103 starts the operation of the inverter compressor 71A and the constant speed compressor 71B and performs inverter compression. The measurement of the elapsed time from the start of operation of the machine 71A and the constant speed compressor 71B is started (STEP 2 in FIG. 11).

  At the same time, the input processing unit 102 confirms (detects) the temperatures of the in-column temperature sensors 41A, 41B, 41C, which are the internal temperatures (STEP 2 in FIG. 11).

  As shown in FIG. 10, when the internal temperature is higher in the order of the internal compartment B, the left compartment A, and the right compartment C, the internal fan rotation speed setting means 104 includes the internal fan 61B and the internal fan 61A. , The number of rotations is set to be lower in the order of the internal fan 61C, and the predetermined time setting means 106 is a compressor (inverter compressor 71A, fixed constant) in the order of the internal fan 61B, the internal fan 61A, and the internal fan 61C. The time from the start of operation of the high-speed compressor 71B) to the start of normal operation of each of the internal fans 61A, 61B, 61C is set longer. Moreover, about the internal fan 61B, the operation start after completion | finish of a power saving operation is delayed rather than the other internal fans 61A and 61C.

  In the example of FIG. 10, the predetermined time setting means 106 starts from the operation start of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation to the normal operation of each internal fan 61A, 61B, 61C. The time (predetermined time) is 4 minutes for the internal fan 61B of the internal warehouse B having the highest internal temperature, and 2 minutes for the internal fan 61A of the left internal A having the highest internal temperature. The internal fan 61 </ b> C of the right internal chamber C having the lowest internal temperature is set to 1 minute.

  Furthermore, for the internal fan 61B having the highest internal temperature, the predetermined time setting unit 106 delays the start of operation after the end of the power saving operation compared to the other internal fans 61A and 61C (internal fan rotational speed setting unit). The time for which the first zero rotation set by 104 is continued) is set to 2 minutes (STEP 3 in FIG. 11).

  In addition, the internal fan rotation speed setting means 104 determines that the internal fan 61B of the internal internal chamber B where the internal internal temperature is the highest is lower than usual at 0 rotation, and the second is an intermittent rate of 75%. The lowest rotation speed among the internal fans 61A, 61B, 61C (lower than usual, where the start of operation is delayed from the other internal fans 61A, 61C by a delay time and the intermittent rate becomes 75%, and the internal fans 61A, 61B, 61C) is set.

  In addition, the internal fan rotation speed setting means 104 has a lower internal temperature for the internal fan 61A having the second highest internal temperature, which is lower than the normal rate at which the intermittent rate is 60%, and the internal fan 61A, 61B, 61C. Then, the rotation speed next to that of the internal fan 61A is set, and the internal fan 61C having the lowest internal temperature is lower than the normal rate at which the intermittent rate is 50%, and the internal fans 61A, 61B, 61C The highest number of revolutions is set.

  Then, for the internal fan 61B of the internal storage B having the highest internal temperature for which the delay time is set, the elapsed time from the start of the operation of the constant speed compressor 71B due to the end of the power saving operation is set by the predetermined time setting means 106. When the set delay time is reached, STEP4 in FIG. 11 is branched to Yes and proceeds to the next STEP5. For the other internal fans 61A and 61C for which no delay time is set, the process proceeds from STEP3 to STEP5 in FIG.

In STEP 5 of FIG. 11, the operation control means 103 starts normal operation of the internal fans 61A, 61B, 61C from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation. Up to this point, the internal fan 61B is operated at a rotational speed at which the intermittent rate is 75%, the internal fan 61A is operated at a rotational speed at which the intermittent rate is 60%, and the internal fan 61C is operated at a rotational speed at which the intermittent rate is 50%.

  The predetermined time set by the predetermined time setting means 106 from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation (internal fan 61A is 2 minutes, internal fan 61B is 4 minutes) When the internal fan 61C is 1 minute), STEP 6 in FIG. 11 is branched to the Yes side, and the operation control means 103 operates the internal fans 61A, 61B, 61C at the number of rotations during normal operation. (STEP 7 in FIG. 11).

  As described above, in the present embodiment, the time from the end of the power saving operation to the start of the normal operation of each of the internal fans 61A, 61B, 61C is set according to the internal temperature immediately after the end of the power saving operation. During that time, the rotation speed of each of the internal fans 61A, 61B, 61C is set smaller (lower) than that of the normal operation, and the internal fan 61B in the internal storage B having a relatively high internal temperature is Normal operation of each of the internal fans 61A, 61B, 61C after the power saving operation is completed by operating the constant speed compressor 71B with a predetermined delay time shorter than the predetermined time after the operation is started. The amount of liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C until it enters, can prevent the liquid refrigerant from returning to the inverter compressor 71A and the constant speed compressor 71B, B It is possible to ensure the reliability of the inverter compressor 71A and a constant-speed compressor 71B.

  Furthermore, while ensuring the reliability of the inverter compressor 71A and the constant speed compressor 71B, the temperature of the in-house heat exchanger 51B in the in-compartment B that has been delayed can be lowered quickly, The temperature can be cooled more quickly.

  In the present embodiment, the operation control means 103 starts operation of at least one of the internal fans 61A, 61B, 61C after completion of the power saving operation, starting operation of the compressor (inverter compressor 71A, constant speed compressor 71B). Than the predetermined time (the time from the start of operation of the compressor (inverter compressor 71A, constant speed compressor 71B) due to the end of the power saving operation to the normal operation of the internal fans 61A, 61B, 61C). It is characterized by being delayed by time.

  In general, the compressor (inverter compressor 71A, constant speed compressor 71B) after a long-time stoppage of the compressor (inverter compressor 71A, constant speed compressor 71B) by power saving operation for a while immediately after the start of operation. The liquid refrigerant is not supplied to the internal heat exchangers 51A, 51B, and 51C, and the supply amount of the liquid refrigerant to the internal heat exchangers 51A, 51B, and 51C gradually increases as time passes, and the internal heat The cooling capacity of the internal heat exchangers 51A, 51B, and 51C increases so as to be proportional to the amount of liquid refrigerant supplied to the exchangers 51A, 51B, and 51C.

  Therefore, as long as the liquid refrigerant is hardly supplied to the internal heat exchangers 51A, 51B, 51C immediately after the start of operation of the compressors (inverter compressor 71A, constant speed compressor 71B), the internal fans 61A, 61B, Even if 61C is stopped, the liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C returns to the compressor (inverter compressor 71A, constant speed compressor 71B) and returns to the compressor (inverter compressor 71A). There is no risk of shortening the life of the constant speed compressor 71B).

  Further, when the operation start of the internal fans 61A, 61B, 61C after the end of the power saving operation is delayed by a predetermined delay time shorter than the predetermined time from the operation start of the compressor (inverter compressor 71A, constant speed compressor 71B). The goods (products) in the left warehouse A, the middle warehouse B, and the right warehouse C are not warmed by the air flow that is not cooled by the interior heat exchangers 51A, 51B, 51C immediately after the power saving operation is finished. In comparison with the case where the operation of the internal fans 61A, 61B, 61C is started in synchronization with the start of operation of the compressors (inverter compressor 71A, constant speed compressor 71B), the internal heat exchangers 51A, 51B, 51C The temperature of can be lowered quickly.

  Further, the internal fans 61A, 61B, 61C that have started operating with a predetermined delay time from the compressor (inverter compressor 71A, constant speed compressor 71B) are compressors (inverter compressor 71A, constant speed compression). Since the rotation speed of the fan 71A, 61B, 61C after the power-saving operation is completed, the rotation speed of the fan 71A, 61B, 61C after completion of the power saving operation is reduced. The same effect as in the second embodiment is also obtained.

  Therefore, by appropriately setting the delay time, after the compressor (inverter compressor 71A, constant speed compressor 71B) is stopped for a long time by the power saving operation, the left fan A is operated by the operation of the fan 61A, 61B, 61C. The liquid refrigerant that does not evaporate in the internal heat exchangers 51A, 51B, 51C is suppressed by the compressor (inverter compressor) while suppressing the occurrence of problems that warm the articles (commodities) in the inner warehouse B and the right warehouse C. 71A, the constant speed compressor 71B), the effect of preventing the life of the compressors (inverter compressor 71A, constant speed compressor 71B) from being shortened can be enhanced as compared with the second embodiment.

  In addition, instead of the internal temperature detected at the end of the power saving operation (or in addition to the internal temperature detected at the end of the power saving operation), the outside air temperature detected by the outside temperature sensor 100 (external temperature detecting means) at the end of the power saving operation. Or the stop time of the compressor (inverter compressor 71A, constant speed compressor 71B) by the power saving operation measured by the compressor stop time measuring means 107 at the end of the power saving operation, or the internal heat exchanger temperature at the end of the power saving operation Based on the temperature of the internal heat exchangers 51A, 51B, and 51C detected by the detecting means (internal heat exchanger temperature sensors 101A, 101B, and 101C), the compressor (inverter compressor 71A, constant speed compression) is completed upon completion of the power saving operation. Machine 71B), and the number of rotations of each internal fan 61A, 61B, 61C between the start of operation and the elapse of a predetermined time, and the internal fans 61A 61B, may be set for a predetermined time to keep lower than the speed during normal operation the rotational speed of 61C.

  In the present embodiment, the internal fan rotation speed setting means 104 delays the start of the internal fan operation by setting the initial rotation speed of the internal fan to be delayed by the delay time to 0, and the predetermined time Although the setting unit 106 sets the delay time, the present invention is not limited to this, and a dedicated delay time setting unit different from the predetermined time setting unit 106 may be provided for setting the delay time.

  In the refrigeration cycle shown in FIG. 2, when the refrigerant flows from the three-way valve 94 to the internal heat exchanger 51C via the capillary tube 93C, the internal heat exchanger 51B in the internal B Since the refrigerant does not flow, the three-way valve 94 is switched so that only the right warehouse C is cooled out of the middle warehouse B and the right warehouse C, and the refrigerant also flows into the internal heat exchanger 51B of the middle warehouse B. After that, the refrigerant after the heat exchange in the internal heat exchanger 51B in the internal compartment B flows into the internal heat exchanger 51C in the internal compartment C (evaporates in the internal heat exchanger 51B in the internal compartment B). Since the liquid refrigerant that has not been passed flows to the internal heat exchanger 51C in the right compartment C), the cooling capacity of the internal heat exchanger 51C is reduced.

  Therefore, when delaying the start of operation of the internal fan 61B in the internal storage B from the internal fan 61C of the right internal C, the operation of the constant speed compressor 71B and the internal fan of the right internal C are performed by the end of the power saving operation. When starting the operation of 61C, the refrigerant flows from the three-way valve 94 to the internal heat exchanger 51C via the capillary tube 93C, the internal heat exchanger 51C cools the right internal C, and the right internal The refrigerant also flows through the internal heat exchanger 51B in the internal B before the internal fan 61B in the intermediate B starts operating after a delay time from the start of the operation of the internal C fan 61C. The three-way valve 94 is switched.

If it does in this way, the ratio of the liquid refrigerant | coolant which flows into 51 C of heat exchangers in the right store | warehouse | chamber is increased by the amount which does not flow a refrigerant | coolant to the heat exchanger 51B of the store | warehouse | chamber interior B at first, The cooling capacity of 51C can be increased to cool C in the right warehouse quickly, and the internal heat exchange after switching the three-way valve 94 so that the refrigerant also flows into the internal heat exchanger 51B of the internal B Taking into account the decrease in the cooling capacity of the vessel 51C, the right-side cabinet C can be sufficiently cooled by the cabinet heat exchanger 51C.

  Further, when the three-way valve 94 is switched so that the liquid refrigerant flows through the three-way valve 94 and then the refrigerant also flows through the internal heat exchanger 51B of the internal storage B, the refrigerant flows through the internal heat exchanger 51B. The time from the start until the internal heat exchanger 51B is sufficiently cooled by evaporation of the refrigerant can be shortened.

  As described above, the article cooling apparatus according to the present invention suppresses the occurrence of a problem that warms the article in the warehouse by the operation of the internal fan after the cooling apparatus having the compressor and the internal fan is stopped for a long time. It is ideal for vending machines that cool and sell products such as beverages because the liquid refrigerant that cannot be evaporated in the internal heat exchanger can return to the compressor and not shorten the life of the compressor. However, it is not limited to those that perform power-saving operations such as beverage vending machines, but can be used for home refrigerators, commercial refrigerators, freezers, and refrigerated warehouses that can shut down cooling devices that have compressors and internal fans. It can also be applied to uses such as cooling the interior of the cabinet.

21 Vending machine 41A, 41B, 41C Inside column temperature sensor 51A, 51B, 51C Inside heat exchanger 61A, 61B, 61C Inside fan 71A Inverter compressor 71B Constant speed compressor 100 Outside air temperature sensor 101A, 101B, 101C Internal heat exchanger temperature sensor 103 Operation control means

Claims (10)

A refrigeration cycle together with the compressor serves as an evaporator during cooling operation to cool the air in the warehouse, and air is blown so that the air cooled by the internal heat exchanger circulates in the warehouse An internal fan with variable rotation speed, internal temperature detection means for detecting internal temperature, and operation control means for controlling the operation of the compressor and the internal fan, the operation control means, During the power saving operation, the operation of the compressor and the internal fan is stopped, and when the power saving operation is completed, the operation of the compressor is started. For the internal fan, the compressor is stopped by the end of the power saving operation. There the period from the start of the operation until a predetermined time elapses suppressed example lower than the rotational speed of the normal of the in-compartment fan driving rotational speed of the in-compartment fan, wherein the in-compartment temperature detected during the power-saving operation end The chamber temperature detected by the The rotation speed of the internal fan is lowered until a predetermined time elapses after the compressor starts operation due to the end of the power saving operation, and the rotation speed of the internal fan is reduced to the normal internal fan. article cooling device according to claim longer be Rukoto the predetermined time to keep lower than the speed during operation. An outside air temperature detecting means for detecting an outside air temperature is provided, and the operation control means starts operation of the compressor at the end of the power saving operation as the outside air temperature detected by the outside air temperature detecting means at the end of the power saving operation is higher. The predetermined time for reducing the rotation speed of the internal fan until the predetermined time elapses and holding the rotation speed of the internal fan lower than the rotation speed during normal operation of the internal fan. The article cooling apparatus according to claim 1, wherein the article cooling apparatus is lengthened. Compressor stop time measuring means for measuring the compressor stop time due to the power saving operation, the operation control means, the compression by the power saving operation measured by the compressor stop time measuring means at the end of the power saving operation The longer the stop time of the machine, the lower the rotation speed of the internal fan until the predetermined time elapses after the compressor starts operating due to the end of the power saving operation, and the rotation speed of the internal fan 2. The article cooling device according to claim 1, wherein the predetermined time is kept longer than the number of revolutions during normal fan operation. It has an internal heat exchanger temperature detection means for detecting the temperature of the internal heat exchanger, and the operation control means detects the internal heat detected by the internal heat exchanger temperature detection means at the end of the power saving operation. The higher the temperature of the exchanger, the lower the rotation speed of the internal fan until the predetermined time elapses after the compressor starts operating due to the end of the power saving operation, and the rotation speed of the internal fan. 2. The article cooling device according to claim 1, wherein the predetermined time is kept longer than the number of revolutions during normal fan operation. It said operation control means, the article cooling device according to claim 1, any one of 4, characterized in that increasing the rotational speed of the in-compartment fan after the power-saving operation end stages. Said operation control means 5 from claim 1, wherein the delaying the operation start of the in-compartment fan after the power-saving operation end only a short predetermined delay time than the predetermined time than the start of operation of said compressor The article cooling apparatus according to any one of the above. The article cooling device according to any one of claims 1 to 6 , wherein the operation control means forcibly operates the compressor until a predetermined condition is satisfied after the power saving operation is completed. 2. An inverter compressor having a variable rotation speed is used as the compressor, and the operation control means operates at a preset rotation speed until a predetermined condition is satisfied after the power saving operation is completed. 8. The article cooling device according to any one of items 1 to 7 . There plurality within the compartment, the article cooling device according to any one of claims 1, characterized in that it comprises the in-compartment fan and the in-compartment heat exchanger to each of the plurality of the box 8. A vending machine comprising the article cooling device according to any one of claims 1 to 9 .

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