JP3253283B2 - Store refrigeration cycle equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration cycle device for a store installed in a small store, a so-called convenience store.

[0001]

2. Description of the Related Art Showcases are installed in small stores, so-called convenience stores. This showcase is for displaying commodities while keeping them in a cold storage state, and there are a showcase for freezing, a showcase for chilled ice, a showcase for refrigeration, and the like having different cooling temperature bands.

[0002] A freezing showcase is used for storing ice cream and frozen foods. The ice temperature chilled showcase is used for storing fresh food, meat, processed food, and the like. Refrigerated showcases include soft drinks, milk, fruits,
It is used to store vegetables, bento, and side dishes.

In a store, an air conditioner is provided in addition to a showcase, and cooling and heating are performed so that customers are comfortable.

[0004] In addition, the interior of the store and the interior of the showcase are brightly illuminated by lighting equipment so that the products can be seen well.

[0005]

Each of the showcases and the air conditioners is operated by an individual refrigeration cycle. Therefore, there is a problem that the number of refrigeration cycle devices is large, the cost is increased correspondingly, and the power consumption is increased.

[0006] The present invention has been made in view of the above circumstances,
The store refrigeration cycle apparatus according to the first aspect of the present invention enables proper operation while sharing the refrigeration cycle between the showcase and the air conditioner, and furthermore, absorbs heat in the showcase to heat the air conditioner. The aim is to improve energy saving characteristics by effectively using it as a source.

[0007] The refrigeration cycle apparatus for a store according to the second aspect of the present invention enables proper operation while sharing the refrigeration cycle of the showcase and the air conditioner by using two compressors. It is intended to improve the life while maintaining the optimum state.

[0008] The refrigeration cycle apparatus for a store according to the third aspect of the present invention enables proper operation while sharing the refrigeration cycle between the showcase and the air conditioner, and further reduces heat absorption in the showcase. An object of the present invention is to improve energy saving characteristics by effectively using the heat source as a defrosting heat source for a case evaporator.

The store refrigeration cycle apparatus according to the fourth aspect of the present invention is to efficiently perform the cooling operation of the showcases while sharing the refrigeration cycle of a plurality of showcases having different cooling temperature zones. It is intended to improve the energy saving characteristics of the entire showcase in the store.

[0010]

According to a first aspect of the present invention, there is provided a refrigeration cycle apparatus for a store, wherein a compressor and a refrigerant discharged from the compressor are passed through an outdoor heat exchanger and passed through the outdoor heat exchanger. The refrigerant flows through the evaporator of the freezing showcase and the evaporator of the ice temperature chilled showcase via the decompressor, respectively, and the refrigerant passing through these evaporators is returned to the compressor.
The refrigerant circulating means and the refrigerant discharged from the compressor are flowed to the outdoor heat exchanger, and the refrigerant passing through the outdoor heat exchanger is passed through a decompressor to the evaporator of the refrigeration showcase and the air conditioning room, respectively. A second refrigerant circulating means for flowing the refrigerant having passed through the evaporator and the indoor heat exchanger to the compressor, and flowing the refrigerant discharged from the compressor to the indoor heat exchanger, A third refrigerant circulation means for flowing the refrigerant having passed through the heat exchanger to the evaporator of the refrigeration showcase via a decompressor, and returning the refrigerant having passed through the evaporator to the compressor.

According to a second aspect of the present invention, there is provided a refrigeration cycle apparatus for a store, wherein a refrigeration compressor, a refrigeration air-conditioning compressor, and a refrigerant discharged from each of the compressors are passed through an outdoor heat exchanger. The refrigerant that has passed through the exchanger flows to the evaporator of the refrigeration showcase via the decompressor, and the refrigerant that has passed through the evaporator is returned to the refrigeration compressor, and the refrigerant that has passed through the outdoor heat exchanger is passed through the decompressor. First refrigerant circulating means for flowing the refrigerant passing through the evaporator to the evaporator of the ice temperature chilled showcase and returning the refrigerant through the evaporator to the refrigeration compressor via the pressure regulator; The refrigerant flowing through the outdoor heat exchanger flows through the outdoor heat exchanger through the decompressor into the evaporator of the refrigeration showcase, and the refrigerant passing through the evaporator is returned to the refrigeration air conditioning compressor, and Air-conditioning of refrigerant passed through exchanger through decompressor A second refrigerant circulation means for flowing the refrigerant having passed through the indoor heat exchanger to the compressor for refrigeration and air conditioning through a pressure regulator, and the refrigerant discharged from each of the compressors. A third refrigerant that flows through the indoor heat exchanger, flows the refrigerant that has passed through the indoor heat exchanger through the decompressor into the evaporator of the refrigerated showcase, and returns the refrigerant that has passed through the evaporator to the refrigeration air-conditioning compressor. Circulation means.

According to a third aspect of the present invention, there is provided a refrigeration cycle apparatus for a store according to the first or second aspect of the invention.
Further, a heat storage tank provided in a refrigerant flow path between the compressor and the outdoor heat exchanger, and a heat medium exchanged with the heat storage tank is circulated between the heat storage tank and the evaporator using a pump device. The system includes a closed cycle in which the heat medium is exchanged with each evaporator so that the heat medium can be exchanged with heat, and a valve is provided in the flow path to each evaporator in the closed cycle to control the flow of the heat medium to each evaporator.

According to a fourth aspect of the present invention, there is provided a refrigeration cycle apparatus for a store, comprising a plurality of evaporators having different cooling temperature ranges from freezing to refrigeration, and the refrigerant flowing into each of these evaporators is individually and independently. While making it controllable, the refrigerant discharged from the compressor is flowed to the outdoor heat exchanger, and the refrigerant that has passed through the outdoor heat exchanger is passed through the decompressor to a plurality of evaporators that have a lower cooling temperature zone and have a higher cooling temperature zone. And a refrigerant circulating means for returning the refrigerant having passed through these evaporators to the compressor.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a small store, a so-called convenience store.
A store office 3 is provided, and a side of the side wall of the store 2 facing the road is an entrance 4 and a transparent glass 5.

At the back of the store 2, a reach-in showcase 6, a walk-in showcase 7, and open showcases 8, 9 are arranged side by side.

The reach-in showcase 6 is provided with a glass door on the front side, and the product on the display shelf is opened and taken out by opening the glass door. The open / close door for storing the product on the rear side is used to replenish the product therefrom. It has become. A cooling unit including an evaporator and a fan is provided at a lower portion, and the cooling air obtained there is circulated to a display shelf.

The reach-in showcase 6 can be used as a freezing showcase, an ice temperature chilled showcase, or a refrigerated showcase.

The freezing showcase has the lowest cooling temperature range and is suitable for storing ice cream and frozen foods.

The ice temperature chilled showcase has a higher cooling temperature range than that for freezing, and is suitable for storing fresh food, meat, processed food, and the like.

The refrigerated showcase has a cooling temperature zone higher than that for ice temperature chilled, and includes soft drinks, milk, fruits, vegetables,
Suitable for storing lunches and prepared dishes.

The walk-in showcase 7 is provided with a glass door at the front, and the products on the display shelf are opened and taken out by opening the glass door. The walk-in showcase 7 is basically the same as the reach-in showcase 6, but has a rear side. A cold storage room 10 also serves as a product stock storage room, from which products are replenished and cooling air is taken in.

The walk-in showcase 7 is used as a refrigerated showcase.

The cooling room 10 has a cooling unit 11 on the ceiling.
To cool the entire room to a predetermined temperature. In addition, the cold storage room 10 continues to the store office 3 through a door for entry and exit, but the door is usually closed so that cool air does not escape.

The open showcases 8, 9 are showcases without a glass door on the front side, and have a structure in which a cooling unit such as an evaporator or a fan is provided at the lower or upper part to send cooling air to a display shelf.

The open showcases 8 and 9 can be used as either an ice temperature chilled showcase or a refrigerated showcase. In this embodiment, the open showcase 8 is allocated for storing lunches and prepared foods. The open showcase 9 is allocated for daily delivery of fresh food, meat, processed food and the like.

In the display shelves of the open showcases 8 and 9, a lighting device for a showcase, for example, a fluorescent lamp is provided on the lower surface side of the uppermost stage, and the light is poured into the product.

An indoor unit 12 for air conditioning is provided on the ceiling of the store 2. The indoor units 12 are of a ceiling embedded type, and the number corresponding to the size of the store 2 is installed.

A fluorescent lamp 13 is provided on the ceiling of the store 2 as a store lighting fixture. The number of the fluorescent lamps 13 can be adjusted, and the number of the fluorescent lamps 13 is set according to the size of the store 2.

In a central space in the store 2, a display shelf 1 for displaying instant food, confectionery, daily necessities and the like is provided.
A plurality of passages 4 are provided to form several rows of passages, and a register counter 15 is installed near the entrance 4.

The register 15 has a register 15a.
The register 15a is connected to the personal computer 16 in the store office 3.

The personal computer 16 is connected to a host computer of a chain headquarters (CVS headquarters) as a terminal on-line, and constructs a merchandise inventory management system means for managing sales merchandise using a POS system.

The personal computer 16 utilizes the stock amount and the rotation status of the products in the showcases 6, 7, 8, and 9 based on the processing of the product inventory management system means, and uses the showcases 6, 7, 8, and 9 to store the information. Control means for controlling the operation mode, and notifying means for notifying the state of the refrigeration cycle, which will be described later, using the online of the product inventory management system means are provided.

On the other hand, an outdoor unit 17 is provided at a position along an outdoor wall, and a compressor, an outdoor heat exchanger, an outdoor fan, and the like are mounted thereon. The compressor and the outdoor heat exchanger disposed in the outdoor unit 17 and the refrigeration cycle connected to the evaporator of the showcases 6, 7, 8, and 9 and the indoor heat exchanger of the indoor unit 12 by piping are connected. Make up. A specific example of the refrigeration cycle will be described later. Refrigeration equipment such as equipment constituting a refrigeration cycle and a showcase is called a cold chain equipment (CC equipment).

The specific structure of the reach-in showcase 6 is shown in FIGS.

The reach-in showcase 6 has a glass door 21 pivotally supported on the front surface so as to be openable and closable, and a housing 22 is provided in a main body corresponding to the glass door 21. This storage 2
2, a plurality of display shelves 23 are provided, and an opening / closing door 24
, The display shelf 23 can be replenished with commodities.

In the storage 22, a fluorescent lamp 31 is provided as a lighting device for a showcase in a vertical frame of the front opening. The fluorescent lamp 31 is for illuminating the storage 22 so that the product can be seen well, and the illuminance can be adjusted.

A cooling unit comprising an evaporator 25 and a fan 26 is provided below the reach-in showcase 6,
The cooling air obtained therefrom is circulated in the storage 22.

An illuminance sensor 27 is mounted on the display shelf 23. This illuminance sensor 27 detects the illuminance in the storage 22.

The glass door 21 is transparent, and has a transparent film-shaped dew-proof heater 28 attached to the front side. The dew-proof heater 28 operates to generate heat by being supplied with current from the heater output controller 29, and functions to prevent the adhesion of dew.

The temperature sensor 30 is mounted on the front surface of the glass door 21. Further, among the display shelves 14 in the store 2, an illuminance sensor 18 and a temperature / humidity sensor 19 are mounted on the top of the display shelves 14 closest to the showcase. The illuminance sensor 18 detects the illuminance in the store 2. The temperature / humidity sensor 19 detects the temperature and humidity in the store.

As for the walk-in showcase 7,
The glass door 21, the storage 22, the display shelf 23, the illuminance sensor 27 in the storage, and the dew-proof heater 2 are simply provided without the opening and closing door 24 on the back.
8. The configurations of the heater output controller 29, the temperature sensor 30, and the fluorescent lamp 31 are almost the same.

FIG. 5 shows the structure of the cool room 10 after the walk-in showcase 7, and FIG. 6 shows the structure of the cooling unit 11 provided in the cool room 10.

The cooling unit 11 has a suction port 11a on the back and the bottom, and an air outlet 11b on the front, and forms a ventilation passage from the air inlet 11a to the air outlet 11b.
The evaporator 33 and the fan 34 are provided there. Further, a duct 35 for forming a warm air passage below the air passage.
, And a fan 36 and a heater (for example, using a positive temperature coefficient thermistor) 37 are provided in the duct 35.
The fan 36 and the heater 37 heat the air flowing in the duct 35 to change it into warm air. This warm air is guided to a blow-out louver 38 attached to the lower surface of the main body, and blows out therefrom in a specific direction in the cool storage room 10.

The blowout louver 38 can be freely rotated by the operation of the louver drive mechanism 39. Further, a human body sensor 40 is attached to the lower surface of the main body, and constantly monitors whether there is a clerk in the cool room 10.

That is, when the human body sensor 40 detects a clerk in the cool room 10, the blower louver 38 is rotated in the detection direction, and the fan 36 and the heater 37 are operated to direct hot air toward the human body. I try to blow it out. Thus, when replenishing the walk-in showcase 7 with a product, the clerk is warmed by warm air, and the cold cold room 1
Work at 0 is not troublesome. Moreover, since the blowing is spot-like, there is no problem that the goods on the display shelf 23 are warmed by the warm air.

FIG. 7 shows a refrigeration cycle.

An oil separator 53 is connected to the discharge port of the first compressor 51 for freezing and the discharge port of the second compressor 52 for refrigeration and air conditioning. A certain electric expansion valve (pulse motor valve; hereinafter abbreviated as PMV) 54 and heat storage tank 5
5, the outdoor heat exchanger 56 is connected.

An outdoor fan 57 is provided near the outdoor heat exchanger 56, and the motor of the outdoor fan 57 is connected to a commercial AC power supply 59 via a wave number control circuit 58. The wave number control circuit 58 controls the wave number of the voltage supplied to the outdoor fan 57 in accordance with the temperature detected by the temperature sensor 60 attached to the outdoor heat exchanger, and thereby controls the air volume of the outdoor fan 57.

The outdoor heat exchanger 56 and its peripheral devices are provided together with the compressors 51 and 52 together with the external outdoor unit 1.
7

An evaporator 63 for freezing is connected to the outdoor heat exchanger 56 via a liquid receiver 61 and a PMV 62 functioning as a decompressor, and the evaporator 63 is connected to a suction port of the compressor 51. The evaporator 63 corresponds to the showcase evaporator 25 that functions as a freezing showcase in the showcase 6.

An evaporator 65 for ice temperature chilling is connected to the outdoor heat exchanger 56 via a liquid receiver 61 and a PMV 64 functioning as a decompressor, and a PMV 66 functioning the evaporator 65 as a pressure regulator. Connected to the suction port of compressor 51. This evaporator 65 is provided in the showcases 6, 7, 9
Of these, it corresponds to the evaporator 25 of the showcase that works as a showcase for ice temperature chilling.

A refrigerator evaporator 68 is connected to the outdoor heat exchanger 56 via a liquid receiver 61 and a PMV 67 functioning as a decompressor, and the evaporator 68 is connected to a suction port of the compressor 52. The evaporator 68 corresponds to the evaporator 25 of the showcase serving as a refrigeration showcase and the evaporator 33 of the cooling unit 11 of the walk-in through showcase 7 among the showcases 6, 7, and 9.

An indoor heat exchanger 70 for air conditioning is connected to the outdoor heat exchanger 56 via a liquid receiver 61 and a PMV 69 functioning as a pressure reducer. The indoor heat exchanger 70 is mounted on the indoor unit 12 and is connected to the indoor unit 1.
As many as two will be prepared. Then, the indoor heat exchanger 70 is connected to a suction port of the compressor 52 via a PMV 71 functioning as a pressure regulator.

The refrigerant inlet side of the indoor heat exchanger 70 is connected to the discharge side of the oil separator 53 via a two-way valve 72 by bypass piping, and the refrigerant outlet side of the indoor heat exchanger 70 is connected to the two-way valve 7.
3 is connected to the refrigerant inflow side of the PMV 67 by a bypass pipe.

The two-way valve 7 is connected to the heat exchanger provided in the heat storage tank 55.
4, 75, 76 via evaporators 63, 65, 6 respectively.
8 is connected in a heat-exchangeable manner, and a closed cycle in which the evaporators are further returned to the heat exchanger of the heat storage tank 55 via the pump 77 is connected. The closed cycle flow path formed from the heat storage tank 55 to each evaporator circulates a heat medium, and the heat storage tank 55
Open the two-way valves 74, 75, 76 with the heat stored in the pump 7
By moving 7, it works to communicate to each evaporator.

Thus, each showcase, air conditioner and outdoor unit are constituted by one common refrigeration cycle. In the refrigerating cycle, each of the evaporators 63, 65, 68 and the indoor heat exchanger 70 are each one.
Although only one is shown, actually a plurality is connected so as to be connected in parallel.

In this refrigerating cycle, the refrigerant discharged from the refrigerating compressor 51 is supplied to the outdoor heat exchanger 56.
Through the outdoor heat exchanger 56 to the PMV 62
The refrigerant flowing through the evaporator 63 is returned to the compressor 51 through the evaporator 63, and the refrigerant flowing through the outdoor heat exchanger 56 is evaporated through the PMV 64 into the evaporator 63 in the ice temperature chilled showcase. And the evaporator 6
A first refrigerant circulating means for returning the refrigerant having passed through No. 5 to the compressor 51 via the PMV 66 for pressure adjustment is formed. In this case, the presence of the PMV 66 causes a difference in the evaporation pressure of the evaporators 63 and 65, which appears as a difference in the cooling temperature zone.

The refrigerant discharged from the air-conditioning compressor 52 flows to the outdoor heat exchanger 56, and the refrigerant having passed through the outdoor heat exchanger 56 flows to the evaporator 68 of the refrigeration showcase via the PMV 67 to evaporate the refrigerant. The refrigerant that has passed through the heat exchanger 68 is returned to the compressor 52, and the refrigerant that has passed through the outdoor heat exchanger 56 is returned to the PMV 6
A second refrigerant circulating means is formed to flow to the air-conditioning indoor heat exchanger 70 via the internal heat exchanger 9 and return the refrigerant having passed through the indoor heat exchanger 70 to the compressor 52 via the pressure adjusting PMV 71. In this case, the presence of the PMV 71 causes a difference in the evaporation pressure between the evaporator 68 and the indoor heat exchanger 70, which appears as a difference in the cooling target.

The refrigerant discharged from the air-conditioning compressor 52 flows into the indoor heat exchanger 70 (opening of the two-way valve 72), and the refrigerant passing through the indoor heat exchanger 70 passes through the PMV 67 to the refrigeration showcase. A third refrigerant circulating means for flowing the evaporator 68 (opening the two-way valve 73 and closing the two-way valve 71) and returning the refrigerant having passed through the evaporator 68 to the compressor 52 is formed. In this case, the heat absorption in the refrigerated showcase is effectively used as the heating heat in the store 2.

The operating conditions of the evaporators 63, 65, 68 and the indoor heat exchanger 70 are shown in comparison with FIG. 8, and the control format of each valve according to the operation mode is shown in FIG.

This valve control includes a constant superheat degree (superheat) value control by PMV in addition to the normal cooling and heating control.

On the other hand, the compressor 5
Oil return pipes 78 and 79 are provided between the pipes 1 and 52, and two-way valves 80 and 81 are provided in these pipes. Then, oil level sensors 82 and 83 for detecting the amount of lubricating oil are attached to the compressors 51 and 52, respectively, and these oil level sensors are connected to the control unit 84 together with the two-way valves 80 and 81. When the lubricating oil amount detected by the oil level sensors 82 and 83 falls below a certain level, the control unit 84 controls the two-way valve 80 and
Works to open 81.

Further, pressure sensors 78 and 79 are attached to the suction pipes of the compressors 51 and 52, respectively. FIG. 10 shows a control structure relating to the pressure detection.

The detected pressures of the pressure sensors 78 and 79 are determined by the CPU.
85, and the control unit 86 connected to the CPU 85,
The inverter 87 controls the inverter circuits 88 and 89. The inverter circuits 88 and 89 once rectify the voltage of the commercial AC power supply 59, convert it to a voltage of a predetermined frequency by switching, and output it. This output is the driving power for the compressors 51 and 52.

FIG. 11 shows a control configuration relating to the evaporator pressure adjustment of the PMVs 66 and 71.

A pressure sensor 91 is mounted on the outlet pipe of the evaporator 65, and a pressure sensor 92 is mounted on the outlet pipe of the indoor heat exchanger 70.
And outputs the outputs of these pressure sensors 91 and 92 to the CPU 95 via the buffers 93 and 94, respectively. The CPU 95 controls the PM by using the control unit 96 so that the detection pressures of the pressure sensors 91 and 92 become the respective set values.
The opening degree of V66, 71 is controlled.

A temperature sensor can be used instead of the pressure sensors 91 and 92. In this case, as shown in the figure,
Temperature sensors 97 and 98 are attached to the inlet pipe of the evaporator 65 and the inlet pipe of the indoor heat exchanger 70, respectively.

By the way, the control of the refrigeration cycle equipment described above is performed by the personal computer 16 in the store office 3 together with the control of other equipment in the store 2. 12 and FIG.
3 is shown.

This control includes the following in addition to the spot hot air blowing control, the valve control according to the operation mode, the oil return control, and the evaporation pressure control already described.

[Control of Dew-Proof Heater] A control circuit shown in FIG. 14 is configured for the dew-proof heater 28 of each showcase.

As shown in FIG. 14, the dew prevention controller 100
The temperature sensor 30 on the front of each showcase glass, the temperature / humidity sensor 19 in the store 2, the heater output controllers 29,
And the data memory 101 are connected.

The dew prevention controller 100 includes a temperature / humidity sensor 19
Then, the temperature and humidity in front of the showcase are detected, the dew point temperature of the glass door 21 is calculated from the data and the data stored in the data memory 101, and the detected temperature of each temperature sensor 30 is higher than the dew point temperature. In such a manner, the amount of electricity to each dew-proof heater 28 is controlled using each heater output controller 29. This not only prevents the adhesion of dew, but also prevents unnecessary energization of each anti-dew heater 28, thereby preventing waste of electricity.

[In-Store Lighting Control] The fluorescent lamp 13 in the store 2
Is controlled according to the outdoor brightness. That is, the illuminance of the fluorescent lamp 13 is increased when the room is bright such as in the daytime, and the illuminance of the fluorescent lamp 13 is suppressed low when the room is dark such as at night, so that the customers entering the store 2 feel uncomfortable. And energy saving can be achieved.

In this case, in addition to simply changing the illuminance, considering that the amount of light entering the store 2 from the outside varies depending on the location in the store 2, as shown in FIG. The illuminance of each fluorescent lamp 13 is made different according to the location e ₁ , e ₂ , e ₃ , e ₄ , e ₅ . Places e ₁ , e ₂ ,
FIG. 2 shows e ₃ , e ₄ , and e ₅ , where e ₁ is the closest position to the outside of the room and e ₅ is the farthest position. By doing so, it is possible to further save energy while maintaining the illuminance in the store 2 constant regardless of the location.

As a method of capturing the outdoor illuminance, there is a method of discriminating a time zone between daytime and night using a clock, and a method of directly detecting the outdoor illuminance.

Means for changing the illuminance of the fluorescent lamp 13 include controlling an input to the fluorescent lamp 13 using an inverter, and selectively turning off or turning on some of the fluorescent lamps 13.

[In-Showcase Illumination Control] In the store 2, the illuminance in front of the showcase is detected by the illuminance sensor 18 on the display shelf 14, and the illuminance in the showcase is simultaneously detected by the illuminance sensor 27. The illuminance of the fluorescent lamp 31 is set such that the illuminance detected by the illuminance sensor 27 is a value higher than the illuminance detected by the illuminance sensor 18 by a predetermined value.

By doing so, the mirror effect can be eliminated while keeping the illuminance of the fluorescent lamp 31 as low as possible, and the goods in the storage 22 can be easily seen through the glass door 21.

Therefore, in addition to the above-described in-store lighting control, the energy saving effect can be greatly improved, and
The exhibition effect can be greatly improved. That is, as shown by a dotted line in FIG. 15, the illumination output can be significantly reduced as compared with the conventional case.

[Control of Rotational Speed of Outdoor Fan] The control of the rotational speed of the outdoor fan 57 by the wave number control circuit 58 detects the temperature detected by the temperature sensor 60, that is, the condensing temperature Tc, as the high pressure side pressure Pd, and controls the high pressure side pressure Pd. It is intended to capture the load and secure the condensation capacity suitable for the load. FIG. 16 shows a flowchart of this control, FIG. 17 shows a change in the high-pressure side pressure Pd, and FIG.
8, shown in FIG.

Specifically, the condensing temperature Tc is compared with the set value Tcs, and when the condensed temperature Tc is higher than the set value Tcs, the rotational speed is proportionally controlled according to the difference between the two. When the condensing temperature Tc becomes equal to or higher than the set value Tcs, the condensing temperature T
The number of rotations is reduced by one step so that c falls within the set value Tcs.

For example, when all the devices are operating as in Case A, a large condensing capacity is required, so the normal control pattern is selected. This is an intermediate type of operation that prioritizes energy saving and low noise.

In the case where the number of operating devices is reduced and the required amount of the condensing capacity has a margin as in the case B, the number of revolutions is reduced and the low-noise priority control pattern in which the high-pressure side pressure is higher is selected.

When the number of operating devices further decreases as in Case C, considering that the rotational speed is already small, the energy-saving operation for increasing the rotational speed and lowering the high-pressure side pressure is performed so as to achieve the most energy-saving operation. Select a control pattern.

[Product Inventory Management Control Using POS System] This is a control executed by the personal computer 16 with the host computer of the chain headquarters (CVS headquarters). (1) Using the POS system data bank “Inventory amount by product (storage classification) process”, “sales amount process”, “receiving amount process”, “date / time and time discriminating process”.

(2) POS system data input device (keyboard, barcode and other data reading device) and sales status (product name, sales time, etc.) processing using registers and the like, and data input processing for storing goods.

(3) POS system display device (CRT,
Data display processing such as a stock list and sales status list by a printer, or print output processing as needed.

(4) A comparison operation between data in the data bank relating to the product and data in the data input device, a sales status process for each time, and a data output process for stock status and the like.

(5) Transmission / reception processing of merchandise management data with the host computer by the communication means.

(6) Input data processing from a remote control device, operation panel, keyboard, etc., various detection data processing, and data input processing based on calculation with reference data.

(7) Processing for setting the operation mode (cooling, heating, etc.) of the air conditioner, the set temperature, and the like. Processing for setting the set temperature, operation mode, defrost mode, etc. of each showcase. Turning on and off the fluorescent lamp 31. Turning on and off the fluorescent lamp 12. Indoor temperature display processing of store 2. Internal temperature display processing for each showcase. Illuminance display processing in the store 22. Maintenance display processing.

(8) Processing for discriminating the operation mode of each showcase based on the input data to the POS terminal device and outputting the discrimination result to the control panel. .

(9) Processing for reading stored control reference data for each device.

(10) Data from the detection means, reference data, and data sent from the terminal control device are input, and these data are compared and calculated, and operation ON / OFF commands, capability command values, operation mode commands, etc. of each device are input. Processing to output.

(11) A process of outputting a control signal to each device based on an output signal from the calculation unit.

[Management Control of Cold Chain Devices Using POS System] The operation of each showcase in the store 2 is managed using a POS system in which a host computer for product management and a POS terminal device are connected online.

[Operation Management Control] As shown in FIG.
The OS system grasps the quantity and content of commodities stored in each showcase, and controls the operation of each showcase based on the data.

In this control, a normal operation mode in which a normal operation according to the set temperature is performed. Energy-saving operation mode in which the set temperature is raised and the compression function is reduced. There is a rapid cooling mode in which operation is performed with the set temperature lowered to increase the compression function.

Further, (a) control according to the quantity of the product.
(B) Temperature control according to the sales trend of the product. (C) There is a demant defrost mode according to the sales trend of the product.

(A) Control According to the Quantity of Goods The operation of the portion where lunches and the like are stored is controlled in the storage time zone of lunches and prepared foods. When all lunch boxes have been sold, or when the stock is low, cooling operation of the space, turning off the lighting, or as an energy saving operation mode, when the product arrives or when it is near the arrival time, restart the operation or The operation is performed in the normal operation mode or the rapid cooling mode.

In this control, the storage load L is detected based on the storage load detection condition shown in FIG.
The operation of each showcase is controlled based on the storage load L and the operating condition determination conditions shown in FIG.

L = (a ₁ · N ₁ + a ₂ · N ₂ + a ₃ · N
₃ + a ₄ · N ₄ ) / (a ₁ · X) X is the maximum showcase capacity.

(B) Temperature control according to the sales trend of the product In each space unit, if the sales amount of the products stored in the showcase is less than a predetermined amount within a set time, the showcase of the corresponding space is set to “energy saving”. The mode is controlled to a “rapid cooling mode” when the amount is equal to or more than a predetermined amount, and to a “normal operation mode” when the amount is intermediate.

[0105] In a time zone when sales are not so much,
It has been stored for a long time in the showcase.
In such a case, the showcase in the space is set to the energy saving operation mode.

On the other hand, during a time when goods are frequently sold, since the goods in the showcase rotate well, the cooled goods are supplied by setting the showcase in the corresponding space to the rapid cooling mode.

(C) Demant defrost mode according to the sales trend of the product.

According to the sales situation throughout the day, the POS can be used to determine the selling time zone and the unselling time zone for each store.
Based on this data, the demand defrost time zone of each showcase is set.

FIG. 23 shows an operation example of the demant defrosting mode.
Shown in

[Maintenance management control] As shown in FIG. 24, the operation state of each device (temperature and pressure of each part of the refrigeration cycle, temperature in the showcase storage, etc.) is checked, and if an abnormal condition of the device is detected, The data is transferred from the control unit to the CC
It sends the information to the terminal control equipment and displays (notifies) its status on this control panel, and uses the communication means of the POS system,
Send to host computer (notification). From the host computer, the service station of the device is contacted to take measures such as repairing for a failure. (Note that
The communication means may be configured to contact the service station directly).

Data is input to the host computer in advance so as to determine the details of the failure based on the transmitted data and to output information such as a response method, a failure part code, a failure repair method, and the like.

Further, the same contents can be output to a CRT or a printer of a terminal.

By performing such online notification processing, parts can be arranged through the host computer, and the arrangement time is reduced. In addition, information such as a method for repairing a failure can be obtained, and quick response is possible.

FIG. 25 shows a modification of the refrigeration cycle.

As shown in FIG. 25, an outdoor heat exchanger 56 is connected to the discharge port of the compressor 51, and the outdoor heat exchanger 56 is connected to a two-way valve 111 and a PMV 62 as a first bypass valve.
Is connected to the evaporator 63 of the refrigeration showcase.
The evaporator 63 is connected to a suction port of the compressor 51 via a PMV 110 as a pressure regulator. Another example of the evaporator is a refrigerator showcase, which is similarly configured.

A PMV 112 functioning as a flow control valve, which is a second bypass valve, is connected in parallel with the outdoor heat exchanger 56. A third space between the refrigerant outlet sides of the indoor heat exchangers 70
The two-way valve 113 which is a bypass valve is connected. The two-way valve 1, which is also a third bypass valve, extends from the refrigerant outlet tube of one indoor heat exchanger 70 to the refrigerant outlet side of the two-way valve 111.
14 is connected. The outdoor heat exchanger 5 is connected to the discharge port of the compressor 51.
6 and an indoor heat exchanger 70 is connected to the outdoor heat exchanger 56 via a PMV 69 functioning as a decompressor.
The indoor heat exchanger 70 is connected to a suction port of the compressor 51 via a PMV 71 as a pressure regulator. Indoor heat exchanger 7
There are a plurality of 0s, and they are configured similarly.

In this refrigeration cycle, the refrigerant discharged from the compressor 51 flows into the outdoor heat exchanger 56, and the refrigerant having passed through the outdoor heat exchanger 56 evaporates in the refrigeration showcase via the two-way valve 111 and the PMV 62. The refrigerant having passed through the evaporator 63 flows through the PMV 110 into the compressor 51.
And the refrigerant having passed through the outdoor heat exchanger 56 flows to the evaporator 68 via the two-way valve 111 and the PMV 67, and the refrigerant having passed through the evaporator 68 is returned to the compressor 51 via the PMV 110. Means are formed. In this case, the presence of the PMV 110 causes a difference in the evaporation pressure of the evaporators 63 and 68, which appears as a difference in the cooling temperature zone.

The refrigerant discharged from the compressor 51 flows to the outdoor heat exchanger 56, and the refrigerant having passed through the outdoor heat exchanger 56 flows to each indoor heat exchanger 70 via each PMV 69, and A second refrigerant circulating means for returning the refrigerant having passed through 70 to the compressor 51 via each PMV 71 is formed. In this case, each indoor heat exchanger 70
And the evaporators 63 and 68 of the showcase have a difference in the evaporation pressure, which appears as a difference in the air conditioning temperature zone.

[0119] The refrigerant discharged from the compressor 51 is referred to as PMV1.
12 and each indoor heat exchanger 7 via each PMV 69 sequentially.
0, and the heating operation is performed.
Through the two-way valves 113 and 114 and the PMV
The evaporators 63, 68 flow through the evaporators 63, 68, and the evaporators 63, 68 perform a cooling operation.
Third refrigerant circulating means for returning the refrigerant that has passed through 68 to the compressor 51 via each PMV 110 is formed. In this case, the heat absorption in each showcase is effectively used as the heating heat in the store 2.

FIG. 26 shows a control format of each valve according to the operation mode of the evaporators 63 and 68 and each indoor heat exchanger 70.

This valve control includes a constant superheat degree (superheat) value control by PMV in addition to the normal cooling and heating control.

FIG. 27 shows another modification of the refrigeration cycle.

As shown in FIG. 27, an outdoor heat exchanger 56 is connected to the discharge port of the compressor 51 through a four-way valve 120, and the outdoor heat exchanger 56 is connected to a two-way valve 1 serving as a first bypass valve.
The evaporator 63 of the freezer showcase is connected to the evaporator 63 via the PMV 67 and 21. The evaporator 63 is connected to a suction port of the compressor 51 via a two-way valve 122 serving as a second bypass valve and the four-way valve 120.

An outdoor heat exchanger 56 is connected to the discharge port of the compressor 51 via a four-way valve 120, and the outdoor heat exchanger 56 is connected to the evaporator of the refrigerated showcase via the two-way valve 121 and each PMV 62. Device 68 is connected. Each of these evaporators 6
8 is connected to the suction port of the compressor 51 via each PMV 110, the two-way valve 122, and the four-way valve 120.

An outdoor heat exchanger 56 is connected to the discharge port of the compressor 51 via a four-way valve 120, and each outdoor heat exchanger 56 is connected to the outdoor heat exchanger 56 via the two-way valve 121 and each PMV 69. The container 70 is connected. This indoor heat exchanger 7
0 is connected to the suction port of the compressor 51 via each PMV 71 and the four-way valve 120.

The PM is connected to the discharge port of the compressor 51 through the four-way valve 120 and the two-way valve 123 as the third bypass valve.
Connect the interconnect of V110 and two-way valve 122.

In this refrigeration cycle, when the four-way valve 120 is not operated, the refrigerant discharged from the compressor 51 is supplied to the four-way valve 12.
0, the refrigerant flows through the outdoor heat exchanger 56, and the refrigerant that has passed through the outdoor heat exchanger 56 flows through the two-way valve 121 and the PMV 62 to the evaporator 63, where the light passenger operation is performed, and the refrigerant that has passed through the evaporator 63 The two-way valve 122 and the four-way valve 120
Through the outdoor heat exchanger 56
Through the two-way valve 121 and each PMV 67 to each evaporator 68, where a cooling operation is performed, and the refrigerant that has passed through each evaporator 68 is passed through each PMV 110, two-way valve 12
2 and a first return to the compressor 51 via the four-way valve 120
Is formed. In this case, the PMV 110
Causes a difference in the evaporation pressure of the evaporators 63 and 68, which appears as a difference in the cooling temperature zone.

When the four-way valve 120 is not operated, the compressor 51
Is discharged to the outdoor heat exchanger 56 through the four-way valve 120, and the refrigerant having passed through the outdoor heat exchanger 56 is passed through the two-way valve 121 and each PMV 69 to the indoor heat exchanger 7.
In this case, a second refrigerant circulating means is formed in which the cooling operation is performed, and the refrigerant that has passed through each indoor heat exchanger 70 is returned to the compressor 51 via each PMV 71 and the four-way valve 120. In this case, the presence of each PMV 71 causes a difference in evaporation pressure between each indoor heat exchanger 70 and the evaporators 63 and 68 of the showcase, which appears as a difference between the refrigeration and freezing temperature zone and the air conditioning temperature zone.

When the four-way valve 120 is not operated, the compressor 51
Is discharged to the outdoor heat exchanger 56 through the four-way valve 120, and the refrigerant having passed through the outdoor heat exchanger 56 is passed through the two-way valve 121 and each PMV 69 to the indoor heat exchanger 7.
0, the cooling operation is performed here, the refrigerant that has passed through each indoor heat exchanger 70 is returned to the compressor 52 via each PMV 71 and the four-way valve 120, and the refrigerant discharged from the compressor 51 is discharged to the four-way valve 120. And the evaporator 63 via the PMV 123 (and each evaporator 6 via the respective PMV 110).
8), where a defrosting operation is performed.
The refrigerant that has passed through (and each evaporator 68) is transferred to the PMV on the indoor heat exchanger 70 side via the PMV 62 (and each PMV 67).
A third refrigerant circulating means for joining the flow of the refrigerant to 69 is formed. In this case, the indoor heat exchanger 70 performs a cooling operation, and the heat absorption is effectively used as defrost heat of each evaporator 63 (and each evaporator 68).

When the four-way valve 120 is operated, the refrigerant discharged from the compressor 51 flows through the four-way valve 120 and each PMV 71 to each indoor heat exchanger 70, where a heating operation is performed, and each indoor heat exchange The refrigerant that has passed through the heater 70 is
9 and the evaporators 63, 68 via the respective PMVs 62, 67.
And the cooling operation is performed here.
A fourth refrigerant circulating means for returning the refrigerant that has passed through 8 to the compressor 51 via each PMV 110, the two-way valve 123, and the four-way valve 120 is formed. In this case, cooling is performed in each showcase, and this heat absorption is effectively used as heating heat in the store 2.

When the four-way valve 120 is operated, the refrigerant discharged from the compressor 51 flows to each indoor heat exchanger 70 via the four-way valve 120 and each PMV 71, where a heating operation is performed, and each indoor heat exchange is performed. The refrigerant that has passed through the heater 70 is
9 and flow to the outdoor heat exchanger 56 via the two-way valve 121;
The refrigerant having passed through the outdoor heat exchanger 56 is returned to the compressor 51 via the four-way valve 120, and the refrigerant discharged from the compressor 51 is returned to the evaporator 63 via the four-way valve 120 and the PMV 122 (and via each PMV 110). Each evaporator 68)
The refrigerant that has passed through the evaporator 63 (and each evaporator 68) flows through the PMV 62 (and each PMV 67) and the two-way valve 121 to the outdoor heat exchanger 56, where Fifth refrigerant circulating means for returning the refrigerant having passed through the heat exchanger 56 to the compressor 51 via the four-way valve 120 is formed. In this case, heating operation and defrosting of each evaporator are performed.

The outdoor heat exchanger 56 has a heat exchanger temperature sensor T
hc, an outlet air temperature sensor T near each indoor heat exchanger 70.
h ₁ , Th ₂ , refrigerant temperature sensors Th ₁₁ , Th ₁₂ , Th ₂₁ , Th _{22 on} the tubes of each indoor heat exchanger 70, and blow-off air temperature sensors Th ₃ , Th ₄ , Th ₅ near each evaporator, refrigerant temperature sensor Th ₃₁ to a tube _{evaporator, Th 32, Th 41, Th} 42,
And attaching the Th _51, Th _52, superheat by PMV (superheat) is to perform such as a constant value control.

Here, the control format of each valve according to the operation mode of the evaporators 63 and 68 and each indoor heat exchanger 70 is shown in FIG.

FIG. 29 shows still another embodiment having a different temperature evaporator of a refrigeration cycle.

Here, the outdoor unit 17 having the compressor 51 is connected to the valve control unit 140, and a plurality of evaporators 131 to 135 having different cooling temperature zones are connected to the valve control unit 140. These evaporators 131 to 13
5, the cooling temperature zone is -20 ° C for freezing, 0 ° C for ice temperature chilling, 0 ° C for ice temperature chilling, 10 ° C for refrigeration, 10 ° C for refrigeration in order.
It has become.

By expanding each valve of the valve control unit 140, the refrigerant circuit shown in FIG. 30 is formed.

The valve control unit 140 includes a plurality of PMV1s.
41 to 145, two-way valves 151 to 156, and check valve 1
61 to 165, and switches the flow of the refrigerant according to the cooling temperature zone of the evaporators 131 to 135.

That is, the refrigerant discharged from the compressor 51 flows to the outdoor heat exchanger 56, and the refrigerant having passed through the outdoor heat exchanger 56 is passed through the PMV from the evaporators 131 to 135 from the evaporators 131 to 135 having a lower cooling temperature zone. Refrigerant circulating means is configured to flow sequentially to higher ones and return the refrigerant that has passed through these evaporators to the compressor.

FIG. 31 shows a format of valve control according to the operation state of each evaporator.

The operation will be described.

When all showcases are driving,
The one with a low cooling temperature zone (the one with a low evaporation temperature) is on the upstream side. Then, the evaporator 131 is first used by the PMV 141.
Cool down. At this time, P
The MV 141 is controlled. As a result, at the outlet of the evaporator 131, the refrigerant enters a gas-liquid mixed state.

The refrigerant having passed through the evaporator 131 is supplied to the next evaporator 13.
It flows to 2,133. At this time, the PMVs 142 and 143
Is fully open, so that the refrigerant flows as the liquid evaporates. Cooling is performed by the heat of evaporation at this time. further,
The same applies to the third-stage evaporator. As a result, the refrigerant temperature gradually increases. However, since an evaporator having a temperature zone corresponding to the evaporator is connected, reliable cooling is possible.

When the operation of all showcases is stopped due to the progress of cooling, the two-way valve 151 is opened and the PMV 141 is fully closed, and the refrigerant flows to the second-stage evaporator, bypassing the first-stage evaporator. This time, the opening degrees of the PMVs 142 and 143 are adjusted, and cooling is performed. At this time, the third-stage evaporator is cooled by leaving the liquid component and flowing the same to the third-stage evaporator.

In the operation using only one evaporator, the bypass and the PMV closing are combined. In the parallel operation of five units, a two-way valve 153, 155, 156 is used to form a parallel circuit.

According to such a configuration, since a large number of PMVs and two-way valves are integrated in the valve control unit 140, installation work is simple. In addition, since this refrigeration cycle is a circuit of only a showcase, the air conditioner constitutes a separate multi-type refrigeration cycle.

[0146]

As described above, according to the present invention, the refrigeration cycle apparatus for a store according to the first aspect of the present invention provides the evaporator and the ice temperature chiller for the refrigeration showcase by the function of the first refrigerant circulating means. The evaporator of the refrigeration showcase is operated, and the operation of the evaporator of the refrigeration showcase and the indoor cooling operation are performed by the operation of the second refrigerant circulating means.
The operation of the evaporator of the indoor heating and refrigeration showcase is performed by the function of the refrigerant circulation means of the room, so that proper operation is possible while sharing the refrigeration cycle between the showcase and the air conditioner. In addition, by effectively utilizing the heat absorption in the showcase as a heating source of the air conditioner, the energy saving characteristics are improved.

In the refrigeration cycle apparatus for a store according to the second aspect of the present invention, the operation of the first refrigerant circulating means operates the evaporator of the refrigeration showcase and the evaporator of the ice temperature chilled showcase. The operation of the evaporator of the refrigeration showcase and the indoor cooling operation are performed by the operation of the refrigerant circulating means, and the operation of the indoor heating operation and the operation of the evaporator of the refrigeration showcase are performed by the operation of the third refrigerant circulating means. The refrigerant flowing through the evaporator of the refrigeration showcase and the evaporator of the ice temperature chilled showcase is supplied to the refrigeration compressor, and the refrigerant flowing through the refrigeration showcase evaporator and the air conditioner indoor heat exchanger is: Since the compressor is returned to the refrigeration air conditioning compressor, it is possible to use two compressors and share the refrigeration cycle of the showcase and the air conditioner, while enabling proper operation. Attained life improved while maintaining the optimal state.

The refrigeration cycle device for a store according to the third aspect of the present invention is the refrigeration cycle device for a store according to the first or second aspect of the invention.
Utilizing the heat source of the heat storage tank, the heat medium of the closed cycle is flowed to the evaporator of the showcase that needs defrosting by using the pump device, and the heat is exchanged to perform defrosting of each evaporator. Therefore, by making the refrigeration cycle common between the showcase and the air conditioner, it is possible to operate properly and the heat absorption in the showcase is effectively used as a defrost heat source for the evaporator of the showcase, The purpose is to improve energy saving characteristics.

In the refrigeration cycle apparatus for a store according to the invention of claim 4, the refrigerant having passed through the outdoor heat exchanger flows through the evaporator in order from the evaporator having a lower cooling temperature zone to the evaporator having a higher cooling temperature zone. With this configuration, the cooling operation of this showcase is efficiently performed while sharing the refrigerating cycle of a plurality of showcases with different cooling temperature zones, thereby improving the energy saving characteristics of the entire showcase in the store. I do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration in a store according to an embodiment of the present invention.

FIG. 2 is an exemplary cross-sectional view of the inside of the store according to the embodiment when viewed from the side;

FIG. 3 is an exemplary sectional view showing the configuration of the showcase in the embodiment;

FIG. 4 is a front view showing the configuration of the showcase in the embodiment.

FIG. 5 is a perspective view showing a configuration of a cold storage room in the embodiment.

FIG. 6 is a cross-sectional view showing a configuration of a cooling unit of the cold storage room in the embodiment.

FIG. 7 is a configuration diagram of a refrigeration cycle in the same embodiment.

FIG. 8 is a diagram showing a format of use conditions of an evaporator and an indoor heat exchanger of a refrigeration cycle in the embodiment.

FIG. 9 is a view showing a control format of each valve of the refrigeration cycle in the embodiment.

FIG. 10 is a configuration diagram of a control circuit related to refrigerant pressure detection in the embodiment.

FIG. 11 is a configuration diagram of a control circuit relating to evaporator pressure adjustment in the embodiment.

FIG. 12 is a block diagram showing a configuration of a system control circuit in the embodiment.

FIG. 13 is a block diagram showing a configuration of a system control circuit in the embodiment.

FIG. 14 is a block diagram showing a configuration of a control circuit for the dew-proof heater in the embodiment.

FIG. 15 is a graph showing the relationship between the location in the store and the illuminance in the embodiment.

FIG. 16 is a flowchart for explaining outdoor fan rotation speed control in the embodiment.

FIG. 17 is a graph showing a change in the high-pressure side pressure when the outdoor fan speed is controlled in the embodiment.

FIG. 18 is a diagram showing a format of outdoor fan rotation speed control in the embodiment.

FIG. 19 is a diagram showing a format of outdoor fan rotation speed control in the embodiment.

FIG. 20 is a flowchart for explaining operation mode control by the POS system of the embodiment.

FIG. 21 is a view showing a format of an incoming load detection condition in the embodiment.

FIG. 22 is a view showing a format of operating condition determination conditions in the embodiment.

FIG. 23 is a graph for explaining a demant defrosting mode in the embodiment.

FIG. 24 is a flowchart for explaining security management control in the embodiment.

FIG. 25 is a configuration diagram of a modification of the refrigeration cycle in the embodiment.

FIG. 26 is a diagram showing a control format of each valve of the refrigeration cycle of FIG. 25.

FIG. 27 is a configuration diagram of another modified example of the refrigeration cycle in the embodiment.

FIG. 28 is a diagram showing a control format of each valve of the refrigeration cycle in FIG. 27.

FIG. 29 is a configuration diagram of still another modification of the refrigeration cycle in another embodiment of the present invention.

FIG. 30 is an expanded view of a configuration of each valve in FIG. 29.

FIG. 31 is a diagram showing a control format of each valve of the refrigeration cycle in FIG. 29.

[Explanation of symbols]

 2 ... store 6 ... reach-in showcase 7 ... walk-in showcase 8, 9 ... open showcase 12 ... indoor unit 17 ... outdoor unit 51, 52 ... compressor 54 ... electric expansion valve 55 ... heat storage tank 56 ... outdoor heat exchange Device 60: Temperature sensor 62: Electric expansion valve 63, 65: Evaporator

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Saito 336 Tatehara, Fuji-shi, Shizuoka Prefecture, in the Toshiba Fuji Plant (72) Inventor Hiroshi Okamoto 336 Tatehara, Fuji-shi, Shizuoka Prefecture, in the Toshiba Fuji Plant ( 72) Inventor Hiroyuki Biwa 336 Tatehara, Fuji-shi, Shizuoka Prefecture Inside the Toshiba Fuji Plant (72) Inventor Kimio Fushimi 336 Tatehara, Fuji City, Shizuoka Prefecture Inside the Toshiba Fuji Plant (72) Inventor Teruji Mochizuki Shizuoka 336 Tatehara, Fuji City, Toshiba Fuji Plant, Inc. (72) Inventor Akira Nakama 336 Tatehara, Fuji City, Shizuoka Prefecture, Tokyo Inside (72) Inventor Keizo Iwata 336 Tatehara, Fuji City, Shizuoka Prefecture, East Inside Shiba Fuji Plant (56) References JP-A-56-157767 (JP, A) JP-A-1-82484 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F2 5D 11/00 101

Claims (4)

(57) [Claims] 1. A compressor and a refrigerant discharged from the compressor are passed through an outdoor heat exchanger, and the refrigerant having passed through the outdoor heat exchanger is passed through a decompressor to evaporator and ice temperature of a refrigeration showcase. First refrigerant circulation means for flowing the evaporators of the chilled showcase to return the refrigerant having passed through the evaporators to the compressor, and flowing the refrigerant discharged from the compressor to the outdoor heat exchanger, The refrigerant that has passed through the exchanger flows into the evaporator of the refrigerated showcase and the indoor heat exchanger for air conditioning via the decompressor, and the refrigerant that has passed through the evaporator and the indoor heat exchanger is returned to the compressor. Refrigerant circulation means,
The refrigerant discharged from the compressor flows into the indoor heat exchanger, the refrigerant that has passed through the indoor heat exchanger flows through the evaporator of the refrigerated showcase through a decompressor, and the refrigerant that has passed through the evaporator is passed through the evaporator. A refrigeration cycle device for a store, comprising: third refrigerant circulation means for returning to a compressor. 2. A refrigeration compressor, a refrigeration air conditioning compressor,
The refrigerant discharged from each of the compressors flows into an outdoor heat exchanger, the refrigerant that has passed through the outdoor heat exchanger flows through a decompressor into an evaporator of a refrigeration showcase, and the refrigerant that has passed through the evaporator is subjected to the refrigeration. The refrigerant that has passed through the outdoor heat exchanger flows into the evaporator of the ice temperature chilled showcase via the decompressor, and the refrigerant that has passed through the evaporator passes through the pressure regulator to the refrigeration compressor. First refrigerant circulating means to return, and the refrigerant discharged from each of the compressors flows to the outdoor heat exchanger, and the refrigerant passing through the outdoor heat exchanger flows to the evaporator of the refrigeration showcase via the decompressor. The refrigerant that has passed through the evaporator is returned to the refrigeration air-conditioning compressor, and the refrigerant that has passed through the outdoor heat exchanger flows through the decompressor into the air-conditioning indoor heat exchanger, and the refrigerant that has passed through the indoor heat exchanger is discharged. Return to the refrigeration / air-conditioning compressor via the pressure regulator Second refrigerant circulation means, and the refrigerant discharged from each of the compressors flows to the indoor heat exchanger, and the refrigerant that has passed through the indoor heat exchanger flows to the evaporator of the refrigerated showcase via a decompressor. And a third refrigerant circulating means for returning the refrigerant having passed through the evaporator to the refrigeration / air-conditioning compressor. 3. The store refrigeration cycle apparatus according to claim 1, further comprising: a heat storage tank provided in a refrigerant flow path between the compressor and the outdoor heat exchanger; A closed cycle in which the heat exchanged heat medium is circulated between the heat storage tank and the evaporator using a pump device to guide the heat medium to each of the evaporators, and the heat medium can be exchanged with heat. A refrigeration cycle device for a store, comprising: a valve interposed in the flow path and controlling the flow of the heat medium to each evaporator. 4. A plurality of evaporators having different cooling temperature ranges from freezing to refrigeration are provided, and the inflow of refrigerant to each of the evaporators can be individually controlled, and the refrigerant is discharged from the compressor. The refrigerant flows into the outdoor heat exchanger, and the refrigerant that has passed through the outdoor heat exchanger flows through the evaporators through the decompressor in order from one having a lower cooling temperature zone to one having a higher cooling temperature band, and the refrigerant that has passed through these evaporators A refrigeration cycle device for a store, comprising: a refrigerant circulating means for returning the refrigerant to the compressor.