JPH10325571A - Device and method for refrigerating and air conditioning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To concentrically control the cooling of a cooling apparatus and the air conditioning in a room such as a store, by one unit of device. SOLUTION: This refrigerating-air conditioning device is equipped with a cooling system of a cooling apparatus 1 having a cooling unit comprising a heat-exchanger 6 which cools a cooling brine by performing a heat-exchange between the refrigerant of a refrigerating cycle and the circulating cooling brine, a cold storage tank 3 which coldaccumulates the cooled cooling brine, and a cold air generating device 4 which generates cooled air by a heat- exchange with the coldaccumulated cooling brine. In addition, an indoor air conditioning system comprising a heat-exchanger 25 for cooling, which performs a heat-exchange between the cooling brine and a brine for air conditioning, and a brine temperature adjusting tank 21 which is connected with the heat- exchanger 25 for cooling and an air conditioning unit 20, and performs the temperature adjustment of the brine for air conditioning being fed to the air conditioning unit 20, is provided. By this method, the cooling of the cooling apparatus 1 and the indoor cooling can be performed by jointly using the cooling apparatus 1 and a heat source for the indoor cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration air-conditioning apparatus and a refrigeration air-conditioning method which combine cooling of cooling equipment such as a showcase, a refrigerator and a vending machine with air conditioning such as cooling of indoor air. The present invention relates to a refrigeration air-conditioning apparatus and a refrigeration air-conditioning method that can cool a cooling device such as a refrigerator or a refrigeration showcase or a refrigerator installed in a store and air-condition a large-sized store at once.

[0002]

2. Description of the Related Art Conventionally, a showcase installed in a large store stores, for example, a high-temperature and high-pressure refrigerant sent through a pipe from a compressor of a cooling unit arranged in a separate machine room. In the above, cooling air is generated by exchanging heat with air supplied to a product display portion of a showcase, and the product air of the showcase is cooled with the cooling air.

[0003] However, the sales floor area occupied by a showcase having a part of a cooling unit such as an evaporator is by no means small, and a showcase for displaying frozen foods and a showcase for refrigerated foods to meet recent demands. In view of the situation in which a large number of products must be installed, it is necessary to reduce the size of the showcase itself while maintaining or increasing the product storage capacity. When connecting pipes by welding or screws, refrigerant such as chlorofluorocarbon gas may leak from the connection points, which may affect environmental issues. Requires large-scale construction such as refrigerant piping work, drainage pipe work, and electrical work. Due to the maintenance and electrical wiring, it is difficult to move the showcase significantly, and if you try to rearrange the showcase, a large-scale construction will be required,
There was a problem that the cost was high.

Therefore, in recent years, the applicant has arranged a heat exchanger in which a refrigerant of a refrigeration cycle or brine cooled by the refrigerant is provided in a separate machine room to exchange heat with air. A cool air generator is provided, the cool air generator generates low-temperature cooling air, and supplies the cooling air with a supply air conduit to a showcase installed in the store. The temperature inside the showcase is adjusted by adjusting the amount of cooling air supplied through the chiller, and the cooling air used for cooling the inside of the showcase is collected into the cool air generator through a collection air duct. Then, a cooling method and a cooling device for cooling equipment such as a showcase and a refrigerator for re-cooling the collected air are being developed.

[0005]

The store where the showcase is displayed is cooled in summer and heated in winter, and is used for cooling and heating the store. The air conditioning equipment is usually required to be large in proportion to the size of the store.

[0006] However, as described above, in view of the fact that it is required to secure a sales floor area as large as possible, it is necessary to reduce the size of the air conditioning equipment of the store.

[0007] Most of the air conditioners use a refrigerating cycle provided also in the cooling device of the cooling device, and the air conditioners in the store are hardly driven at midnight when the store is closed. This is the actual situation.

Therefore, if centralized control can be performed by using a part of the cooling device of the cooling device, a cooling device of a cooling device using a similar refrigeration cycle and an air conditioner of a store can be used. Needless to say, cooling and heating can be performed more efficiently and economically than installing a plurality of air conditioners in a store independently. This leads to effective use of the refrigerant, cooled brine, and the like. In addition, the fact that the air conditioner is not used at midnight means that the load of the refrigeration cycle is small at midnight, so that it can be said that midnight power is easily used for refrigeration and air conditioning during the day.

The present invention has been made in view of the above points, and provides a refrigeration air-conditioning apparatus and a refrigeration air-conditioning method capable of centrally controlling the cooling of cooling equipment and the air conditioning of a room such as a store by a single device. The purpose is to do.

[0010]

According to a first aspect of the present invention, there is provided a refrigeration air conditioner comprising: a plurality of cooling devices each having a cooling air outlet and a cooling air inlet; A refrigeration cycle that circulates so as to generate a heat exchanger that cools the cooling brine by exchanging heat between the refrigerant of the refrigeration cycle and the circulating cooling brine, a cold storage tank that stores the cooled cooling brine,
A cooling unit comprising a cool air generator for generating cooling air by heat exchange with the stored cooling brine, and cooling air produced in the cool air generator being supplied so as to be blown out from a cooling air outlet of each cooling device. And a cooling pipe for collecting cooling air from the cooling air suction port of each cooling device into the cooling air generator. At least one air conditioning unit for generating desired temperature air by heat exchange with the brine, and cooling heat exchange disposed in a cooling brine circulation path in the cooling unit for performing heat exchange between the cooling brine and the air conditioning brine. And the air conditioning brine connected to the cooling heat exchanger and each air conditioning unit and supplied to each air conditioning unit. Characterized by comprising the indoor air conditioning system including a brine temperature regulating tank that performs Temperature Controller.

According to the refrigeration air conditioner of the present invention, cooling equipment such as a showcase and a heat source for indoor cooling can be shared to perform cooling of the cooling equipment and indoor cooling.

According to a second aspect of the present invention, there is provided a refrigeration air conditioner comprising: a plurality of cooling devices each having a cooling air outlet and a cooling air inlet; a refrigeration cycle circulating so as to cause a change in state of the refrigerant; A heat exchanger that exchanges heat between the refrigerant and the circulating cooling brine to cool the cooling brine, a cold storage tank that stores the cooled cooling brine, and cool air that generates cooling air by exchanging heat with the cooled cooling brine. A cooling unit comprising a generator;
A supply pipe for supplying cooling air produced in the cool air generator from the cooling air outlet of each cooling device, and supplying the cooling air from the cooling air suction port of each cooling device to the cooling air. With a cooling system of a cooling device comprising a collection pipe for collecting in the generator, and at least one air conditioning unit disposed in the room to generate desired temperature air by heat exchange with air conditioning brine,
A cooling heat exchanger disposed in a circulation path of the cooling brine in the cooling unit for performing heat exchange between the cooling brine and the air-conditioning brine; and heat exchange between a high-temperature refrigerant of a refrigeration cycle and hot water for heating in the cooling unit in the cooling unit. A heat exchanger for performing heat exchange between hot water for heating heated by the waste heat exchanger and brine for air conditioning, the heat exchanger for cooling and the heat for heating. An indoor air conditioning system comprising a brine temperature control tank selectively connected to one of the exchangers and connected to the air conditioning units and controlling the temperature of the air conditioning brine supplied to the air conditioning units. Features.

According to the refrigeration air conditioner of the present invention,
The cooling device and the heat source for indoor cooling and heating can be shared to perform cooling of the cooling device and indoor air conditioning.

According to a third aspect of the present invention, there is provided a refrigeration air conditioner according to the first or second aspect, wherein the cooling heat exchanger includes a cooling air generator in a circulation path of the cooling brine. It is arranged on the way to the cold storage tank from the center.

[0015] According to the refrigeration air conditioner of the present invention,
Cooling of the room can be efficiently performed by using the cooling brine having a relatively high temperature after producing the cooling air for cooling the cooling device.

A refrigeration air conditioner according to a fourth aspect of the present invention is the refrigeration air conditioner according to the second aspect, wherein the exhaust air is supplied to the brine circulation path between the exhaust heat exchanger of the indoor air conditioning system and the brine temperature control tank. A heat storage tank for storing the liquid heat of the air conditioning brine heated by the heat exchanger in a heat storage material is provided.

According to the refrigeration air conditioner of the present invention, the latent heat stored in the heat storage material by the midnight power can be used for daytime heating.

According to a fifth aspect of the present invention, there is provided the refrigeration air conditioner according to any one of the second to fourth aspects, wherein the brine circulates through the exhaust heat exchanger and the heat storage tank of the indoor air conditioning system. A dedicated heating brine is used, and a heating heat exchanger for exchanging heat between the heating brine and the air conditioning brine is provided.

According to the refrigeration air conditioner of the present invention, since the heating brine is separated from the air conditioning brine, only the heating brine which is easily deteriorated by heating can be replaced alone.

According to a sixth aspect of the present invention, there is provided the refrigeration air conditioner according to the fifth aspect, wherein a boiler for heating water is provided, and heat exchange is performed between the hot water heated by the boiler and the heating brine. An auxiliary heat exchanger is provided.

According to the refrigeration air conditioner described in the present invention,
Even when the heat source is insufficient, the heating can be stably performed by the hot water of the boiler.

A refrigeration air conditioner according to a seventh aspect of the present invention is the refrigeration air conditioner according to any one of the first to sixth aspects, wherein the cooling brine is supplied from the regenerator to the cool air generator in the cooling unit. In a circulation path for circulating, a heat exchange between the stored cooling brine and the refrigerant of the refrigeration cycle is performed, and a first additional cooling heat exchanger for further cooling the cooling brine is provided. I have.

According to the refrigeration air conditioner described in the present invention,
By additionally cooling the first brine using the refrigerant of the refrigeration cycle, it is possible to stably cool the cooling device and the room even if the heat energy for cooling in the regenerator is insufficient.

The refrigeration air conditioner according to claim 8 is the refrigeration air conditioner according to any one of claims 1 to 7, wherein the indoor air conditioning system includes an air conditioner supplied to the brine temperature control tank. And a second additional cooling heat exchanger for performing heat exchange between the cooling brine and the refrigerant of the refrigeration cycle in the cooling unit and further cooling the cooling brine.

According to the refrigeration air conditioner described in the present invention,
Even if the thermal energy for cooling in the brine temperature control tank is insufficient, the cooling device and the room can be stably cooled.

A refrigeration air conditioner according to a ninth aspect of the present invention is the refrigeration air conditioner according to any one of the first to eighth aspects, wherein the temperature of the air conditioning brine stored in the brine temperature control tank is maintained. And an agitating fan for agitating the stored air-conditioning brine.

[0027] According to the refrigeration air conditioner of the present invention,
Air conditioning temperature control for cooling and heating can be performed under appropriate temperature management using the temperature detecting means.

According to a tenth aspect of the present invention, in the refrigeration air conditioner according to any one of the first to ninth aspects, the refrigeration air conditioner causes the refrigerant to change state. A cooling unit for night cooling having a circulating refrigeration cycle and a heat exchanger for exchanging heat between the refrigerant of the refrigeration cycle and the circulating cooling brine to cool the cooling brine is connected.

[0029] According to the refrigeration air conditioner according to the present invention,
In the middle of the night, the main cooling unit is driven by midnight power for cold storage, etc., to prepare for cooling and air conditioning of daytime cooling devices, while the nighttime cooling unit is driven for cooling of nighttime cooling devices. By doing so, it is possible to effectively use midnight power.

The refrigeration air conditioner according to the eleventh aspect of the present invention is the refrigeration air conditioner according to any one of the first to ninth aspects, wherein the air used for cooling to the cool air generator is recovered from each cooling device. The cooling pipe for air-conditioning and the indoor air suction unit are branched and connected to the collection pipe, and the air-conditioning cool air discharge unit and the indoor air suction unit are provided with valve members capable of mutually proportionally controlling the air flow. Features.

According to the refrigeration air conditioner described in the present invention,
The cooling in the room and the like can be performed by the brine in the brine temperature control tank, and the cooling air collected in the collection pipe can be directly supplied to the cooling in the room.

A refrigeration air conditioner according to a twelfth aspect of the present invention is a refrigeration cycle having a plurality of cooling devices each having a cooling air outlet and a cooling air intake, circulating the refrigerant so as to change the state of the refrigerant, and the refrigeration cycle. A heat exchanger that exchanges heat between the refrigerant and the circulating cooling brine to cool the cooling brine, a cold storage tank that stores the cooled cooling brine, and cool air that generates cooling air by exchanging heat with the cooled cooling brine. A cooling unit comprising a generator, a supply pipe for supplying cooling air produced in the cold air generator from a cooling air outlet of each of the cooling devices, and cooling from a cooling air inlet of each of the cooling devices. A cooling system for a cooling device comprising a collection pipe for collecting the air supplied to the cold air generator, and the collection pipe, Cold air discharge unit and the indoor air suction unit branch connected for adjustment, is characterized in that the valve member can be mutually proportional control the air flow rate is provided for each of these air-conditioning cool air discharge unit and the indoor air suction unit.

According to the refrigeration air conditioner described in the present claim,
The cooling air collected in the collection pipe can directly cool the room.

According to a refrigeration / air-conditioning method according to a thirteenth aspect, the cooling brine is cooled by heat exchange with a refrigerant of a refrigeration cycle in a cooling source provided separately from each cooling device, and then the cooling brine is stored in a regenerator. In the state where the temperature is lower than the set temperature of each cooling device by heat exchange between the cooling brine stored in the cold air generating device and the collected air collected in the cold air generating device from the cooling device through the collecting pipe from the cooling device. Along with producing cooling air for cooling the cooling equipment supplied through a supply pipe to the cooling equipment, the air conditioning brine is changed from the indoor set temperature by replacing the cooling brine with the cooling brine in the cooling brine circulation path in the cooling source. After cooling to a low temperature, the air-conditioning brine is stored in a brine temperature control tank, and the air-conditioning brine is cooled to a desired temperature lower than an indoor set temperature. After the temperature is adjusted such that the air conditioning brine is circulated and supplied to the indoor air conditioning unit, the air conditioning unit produces cooling air for indoor air conditioning by exchanging heat between the air conditioning brine and room air. It is characterized by doing.

According to the refrigeration / air-conditioning method of the present invention, the cooling air can be produced by controlling the temperature of the cooling air for cooling the cooling equipment using the cooling brine, and the cooling brine can be used. Cooling the air-conditioning brine, and adjusting the temperature of the cooling air for cooling with the air-conditioning brine to produce the cooling air.

According to a refrigeration air-conditioning method according to a fourteenth aspect, in the refrigeration air-conditioning method according to the thirteenth aspect, the cooling brine stored in the regenerator is supplied to a cooling air generator before being supplied to a cool air generator in a circulation path thereof. It is characterized in that heat is exchanged again with the refrigerant of the refrigeration cycle to perform additional cooling.

According to the refrigeration and air-conditioning method of the present invention,
By additionally cooling the cooling brine whose temperature has increased, it is possible to produce cooling air while controlling the temperature so that cooling air at a desired temperature can be obtained.

According to a refrigeration / air-conditioning method according to a fifteenth aspect, in the refrigeration / air-conditioning method according to the thirteenth or fourteenth aspect, the air-conditioning brine stored in the brine temperature control tank is heat-exchanged again with the refrigerant of the refrigeration cycle. It is characterized by additional cooling.

According to the refrigeration and air-conditioning method of the present invention,
By additionally cooling the air-conditioning brine whose temperature has increased, it is possible to produce cooling air while controlling the temperature so that cooling air for air-conditioning at a desired temperature can be obtained.

In a refrigeration / air-conditioning method according to a sixteenth aspect, the cooling brine is cooled by exchanging heat with a refrigerant of a refrigeration cycle in a cooling source provided separately from each of the cooling devices, and then the cooling brine is stored. Cold storage in the tank, in a state lower than the set temperature of each cooling device by heat exchange between the cooling brine stored in the cold air generator and the recovered air collected in the cold air generator via the recovery pipe from the cooling device. To produce cooling air for cooling equipment supplied through supply pipes to each cooling equipment, and to selectively produce cooling air or heating air for indoor air conditioning, the cooling brine in the cooling source After cooling the air conditioning brine to a temperature lower than the indoor set temperature by replacing the cooling brine in the circulation path, the air conditioning brine is cooled to the brine. The air conditioning brine is stored in a temperature control tank, the temperature of the air conditioning brine is adjusted to a desired temperature lower than the indoor set temperature, and then the air conditioning brine is circulated and supplied to an indoor air conditioning unit. The cooling air for indoor air conditioning is produced by heat exchange between the air conditioning brine and room air, or the hot water for heating is heated to a high temperature by heat exchange with a high-temperature and high-pressure refrigerant in a refrigeration cycle of the cooling source. After heating, the air-conditioning brine is heated to a temperature higher than the indoor set temperature by heat exchange with the heating hot water, and then supplied to the indoor air-conditioning unit. It is characterized by producing heated air for indoor air conditioning by heat exchange.

According to the refrigeration and air-conditioning method of the present invention,
Cooling air can be produced by controlling the temperature of cooling air for cooling cooling equipment using the cooling brine and cooling or heating the air-conditioning brine to cool or heat the room. it can.

According to a refrigeration air conditioning method of the present invention, in the refrigeration air conditioning method of the invention, the heating brine is heated by the boiler before being subjected to heat exchange with the air conditioning brine in the circulation path. It is characterized in that heat is exchanged with the heated water and additional heating is performed.

According to the refrigeration and air-conditioning method of the present invention,
Even when the heat source is insufficient, the heating can be stably performed by the hot water of the boiler.

In the refrigeration / air-conditioning method according to the present invention, the cooling brine is cooled by exchanging heat with a refrigerant of a refrigeration cycle in a cooling source provided separately from each cooling device, and then the cooling brine is stored in a regenerator. In the state where the temperature is lower than the set temperature of each cooling device by heat exchange between the cooling brine stored in the cold air generating device and the collected air collected in the cold air generating device from the cooling device through the collecting pipe from the cooling device. In addition to producing temperature-regulated air for cooling the cooling device supplied to the cooling device via a supply pipe, the collection pipe is branched and connected to a cooling air discharge unit for air conditioning for air conditioning and an indoor air suction unit. The cooling air in the recovery pipe is supplied into the room from the cooling air discharge unit for air conditioning, and the same amount of room air as the cooling air supplied into the room is supplied to the room air. It is characterized by recovering from the entry unit to the recovery piping.

According to the refrigeration and air-conditioning method of the present invention,
The cooling air for indoor cooling can be manufactured by effectively utilizing the air provided for cooling the cooling device.

[0046]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a refrigeration air conditioner to which a refrigeration air conditioning method of the present invention is applied will be described with reference to FIG.

As shown in FIG. 1, in a store S such as a supermarket, a plurality of showcases 1 are installed as an example of a cooling device.

On the machine room M side, which is isolated from the store S in which each of the showcases 1 is installed, a daytime cooling refrigeration cycle 2 for cooling the product display section of each of the showcases 1 in the daytime. A cold storage tank 3 for keeping the first brine cooled by exchanging heat with the refrigerant cooled by the daytime cooling refrigeration cycle 2, the heat of the first brine, the sprayed cooling liquid and the surrounding medium to be cooled. A cooling air generating device 4 for generating cooling air by performing exchange, a water removing device (not shown in FIG. 1) for evaporating water contained in the cooling liquid having exchanged heat with the medium to be cooled, and A night-time refrigeration cycle 5 for cooling the product display section of the showcase 1 at night is provided.

The daytime cooling refrigeration cycle 2 comprises a compressor (not shown), a condenser 2B, an expansion member 2C, and an evaporator (not shown) provided in the refrigerator main body 2A. The compressor, the condenser 2B, the expansion member 2C, and the evaporator are sequentially connected by pipes 12, 12 for circulating the refrigerant so as to cause a state change.
In the present embodiment, the evaporator is disposed in a heat exchanger 6, and the heat exchanger 6 is connected to the cold storage tank 3 by two pipes 14 having a pump 7. Then, in the heat exchanger 6, the pipes 14, 14
The first brine, which is not frozen even at a relatively low temperature and stored in the regenerator 3 that circulates, is cooled by performing heat exchange with the refrigerant cooled by the refrigeration cycle 2 for daytime cooling.

That is, in the daytime refrigeration cycle 2, the refrigerant passes through the expansion member 2C to be in a low-temperature, low-pressure gas-liquid mixed state, and in this state, the heat exchanger is connected to the pipe 12 through which the refrigerant is circulated. 6 is supplied to the evaporator 6 and the first refrigerant is supplied by the refrigerant.
The brine will be cooled. In addition, as the first brine, it is desirable to use a calcium chloride solution having a property that viscosity is hardly produced, or to use an ethylene glycol solution.

Hereinafter, the case where a calcium chloride solution is used will be described.

In the regenerator 3 in which the first brine is stored, a second brine, for example, mainly containing sodium nitrate and water, is further frozen at a temperature slightly higher than the cooled first brine. A plurality of regenerative members (not shown) in which a preparation prepared by mixing the above materials is enclosed in a container are arranged at intervals from each other so that the first brine can flow along the outer periphery.

As shown in FIG. 2, a cooling fin coil 51 as a heat exchanger is provided in the cool air generator 4.
A coolant spray nozzle 52 and a storage tank 53 to be described later are provided, respectively.

The regenerator 3 is connected to the cooling fin coil 51 provided in the cool air generator 4 by two pipes 18 for circulating the first brine. The first brine is circulated between the cold storage tank 3 and the cool air generator 4 by the pump 8 provided in the pipe 18.

The cooling air generator 4 will be described in more detail. As shown in FIG. 2, the cooling air generator 4 is provided with a cooling unit as a heat exchanger arranged so as to be folded back in a zigzag pattern. The fin coils 61, 61 ...
The collected air is arranged and stored along the flow direction of the collected air. In the vicinity of the ceiling of the cool air generator 4 and above the cooling fin coil 61, a coolant is supplied to the cool air generator 4.
A plurality of spraying nozzles 62 are arranged for spraying the cooling fin coils 61 and attaching them to the cooling fin coils 61.

Further, at the bottom of the cool air generator 4,
A storage tank 63 for collecting and storing the cooling liquid sprayed from the spray nozzle 62 is formed. One end of a spray pipe 64 having a spray pump 65 as a cooling liquid supply unit is connected to the storage tank 63, and the other end of the spray pipe 64 is connected to the spray nozzle 62. ing.

Here, the cooling liquid absorbs moisture contained in the collected air collected by the cool air generator 4 and adheres to the outer peripheral surface of the cooling fin coil 61 so that the cooling fin coil 61 is attached. A liquid agent that is sprayed for the purpose of preventing frost.For example, a liquid agent having high hygroscopicity and thermal conductivity such as propylene glycol or lithium chloride, and having a low freezing point and low viscosity is used as a main liquid agent. . In particular, since the propylene glycol is officially specified as a food additive, from the viewpoint of food hygiene,
It is suitable for producing cooling air that directly or indirectly hits food, and has the advantage of being cheap. In the first embodiment, a description will be given of a case where a cooling liquid mainly containing the propylene glycol and a food additive such as an antioxidant is added thereto. Since the coolant is cooled by heat exchange with the cooling fin coil 61, the collected air is cooled by heat exchange between the coolant and the collected air.

In the vicinity of the cool air generator 4, a water removing device 66 for evaporating water contained in the cooling liquid is provided.
Are arranged. A plurality of spray nozzles for uniformly spraying a coolant (hereinafter, referred to as a "collected coolant") recovered by the moisture remover 66 in a heated state above the heat exchange chamber 67 in the moisture remover 66. , And an eliminator 69 for preventing discharge of the recovered cooling liquid sprayed from the spray nozzles 68, 68 and discharging only steam to the outside of the room.
A storage tank 70 for evaporating the recovered coolant is provided below the heat exchange chamber 57.

In the evaporating storage tank 70, a spray pipe having a concentration circulation pump 72 for circulating a part of the recovered coolant in the water removing device 66 to repeatedly spray from the spray nozzle 68 for removing water. One end of the spray pipe 71 is connected, and the other end of the spray pipe 71 is connected to the spray nozzle 68.

The cooling air generator 4 and the water removing device 66 are connected by pipes 73 for circulating the cooling liquid. Among the pipes 73, one end of a pipe 73A for circulating the cooling liquid from the cool air generator 4 to the moisture removing apparatus 66 is connected to the storage tank 63 of the cool air generator 4, and the other end is circulated. The pump 74 and the heat exchangers 75A, 75B, and 75C are connected to the distribution pipe 71 via the respective heat exchangers. On the other hand, the water removal device 6
A pipe 7 for circulating the cooling liquid from 6 to the cool air generator 4
3B, one end thereof is connected to an evaporating storage tank 70 of the water removal device 66, and the other end is connected to the storage tank 63 of the cool air generator 4 via the heat exchanger 65A. .

The storage tank 63 of the cool air generator 4 is provided with an electrode rod (not shown) that is energized by being immersed in a cooling liquid, and is stored in the storage tank 63 by the electrode rod. The liquid level of the cooling liquid is controlled, and the concentration circulation pump 72 and the circulation pump 74 are driven in accordance with the rise and fall of the liquid level, and the pipes 71, 73A, 73B
The on / off valves 76 provided in the first embodiment are opened and closed.

Meanwhile, in the heat exchanger 75A, the cooling liquid supplied for producing the cooling air flowing through the pipe 73A is included in the cooling liquid by being heated in the moisture removing device 66 flowing through the pipe 73B. It is configured to perform heat exchange with the concentrated cooling liquid from which water has been removed. Further, in each of the heat exchangers 75B and 75C, the cooling liquid heated by passing through the heat exchanger 75A discharges, for example, the exhaust heat generated in the refrigeration cycles 2 and 5 and the exhaust of the in-store air conditioner. The heat exchange is performed with the heat, and the heat is gradually increased to a high temperature.

Returning to the refrigeration air conditioner shown in FIG. 1, the pipe 18 which is a circulation route of the cooling brine is provided on the way from the cold storage tank 3 to the cool air generator 4 on the way to the cold brine. A first additional cooling heat exchanger 9 having an evaporator for performing heat exchange with the refrigerant of the daytime cooling refrigeration cycle 2 is provided. On the other hand, a first additional cooling refrigerant pipe 1 for circulating the low-temperature refrigerant is provided between the first additional cooling exchanger 9 and the refrigeration cycle 2.
0 is provided, and an expansion member 2C is provided in the refrigerant pipe 10 on the upstream side of the first additional heat exchanger 9 of the refrigerant pipe 10.

A compressor (not shown) of the daytime cooling refrigeration cycle 2 is normally driven by using midnight electric power, and accumulates heat energy by freezing a cold storage member in the cold storage tank 3. The stored thermal energy is used for daytime cooling, and its driving is also controlled by temperature detecting means (not shown) such as a thermistor disposed in the cold air generator 4 during daytime cooling. It has become so. That is, for example, when the temperature of the generated cool air in the cool air generator 4 detected by a temperature detection unit (not shown) disposed in the cool air generator 4 rises from the upper limit set temperature, At the same time as the start of driving, the pump 7 of the pipe 14 as well as the pump 8 of the pipe 18 which is constantly driven is started in the daytime. Then, the first brine in the pipe 14 cooled by the refrigerant in the heat exchanger 6 is supplied to the pipe 18 via the cold storage tank 3, and heat-exchanged again with the refrigerant in the heat exchanger 9 to be further cooled. It is supplied to the cool air generator 4.

It should be noted that the temperature detecting means is provided in the cold air generator 4.
When the lower limit set temperature is detected, the driving of the compressor is stopped, the driving of the pump 7 of the pipe 14 is stopped, the driving of only the pump 8 is continued, and the first between the cold storage tank 3 and the cold air generator 4 is stopped. It is configured to secure a brine distribution channel.

Further, the refrigeration air conditioner of the present embodiment has a night-time refrigeration cycle 5 used for cooling the showcase 1 and the like at night. This night-time cooling refrigeration cycle 5 is for cooling the showcase 1 and the like at night, but is disposed in the refrigerator main body 5A at night because the outside air temperature is relatively lower than at daytime. The refrigerating capacity of a compressor (not shown) or the like is about half that of the daytime cooling refrigerating cycle 2. The nighttime cooling refrigeration cycle 5 has a heat exchanger 13 for exchanging heat between the refrigerant on the downstream side of the expansion member 5C of the pipe 11 and the circulating first brine. This heat exchanger 13
Is connected to the cooling fin coil 61 provided in the cool air generator 4 by two pipes 19, 19 for circulating the first brine, and the first brine is connected to the pipe 19. The pump 15 is arranged to circulate between the heat exchanger 13 and the cool air generator 4.

An opening (not shown) of a collection pipe 16 communicating with each of the showcases 1 is connected to the cool air generating device 4 so that the collected air used for cooling each of the showcases 1 is cooled. By driving the fan 16F, the cool air is collected at the most upstream side in the air flow direction of the cool air generator 4. A supply pipe 17 for supplying cooling air cooled in the cool air generator 4 to each of the showcases 1 by driving a fan 17F is provided at the most downstream side in the air circulation direction of the cool air generator 4. An opening (not shown) is connected.

A cooling system for the showcase 1 is constituted by the showcase 1, the refrigeration cycle 2 for daytime cooling, the regenerator 3, the cool air generator, the refrigeration cycle 5 for nighttime cooling, the collection pipe 16 and the supply pipe 17. ing.

The refrigeration air conditioner of this embodiment has an indoor air conditioning system for controlling indoor cooling and heating in addition to the cooling system.

The indoor air-conditioning system is provided, for example, in a store S where the showcase 1 is installed, or in another office room, etc., and generates a plurality of conditioned air at a desired temperature by heat exchange with an air-conditioning brine. Air conditioning unit 20. Each of the air conditioning units 20 includes a heat exchange coil (not shown) through which an air conditioning brine passes, and an inverter-controlled fan that supplies room air to be subjected to heat exchange to the coil. There is a configuration in which air having a desired temperature is produced by exchanging heat between the air-conditioning brine circulating in the coil and the amount of room air controlled by the number of revolutions of the fan.

The indoor air-conditioning system has a brine temperature control tank 21 for controlling the temperature of the air-conditioning brine supplied to each air-conditioning unit 20. The brine temperature control tank 21 and each of the air-conditioning units 20 Is a supply pipe 22 provided with a pump 23 for supplying the air conditioning brine to each air conditioning unit 20, and a collection pipe 24 for collecting the air conditioning brine used for air conditioning in each air conditioning unit 20 into the brine temperature control tank 21. And are connected by It is desirable to use a calcium chloride solution, an ethylene glycol solution, or the like as the air conditioning brine. Further, the brine temperature control tank 21
Is configured to store the air-conditioning brine, and operate the agitating fan (not shown) disposed inside to control the temperature of the air-conditioning brine stored by a thermistor (not shown).

On the other hand, a cooling heat exchanger 25 for exchanging heat between the cooling brine and the air-conditioning brine is provided on the pipe 18 for returning the cooling brine from the cold air generator 4 to the cold storage tank 3. The heat exchanger 25 and the brine temperature control tank 21 are connected by two brine pipes 26 having a pump 27 on one side.
The air-conditioning brine is circulated between the heat exchanger 25 and the brine temperature control tank 21 by the driving of the air conditioner. In the present embodiment, the cooling heat exchanger 25 is disposed in the pipe 18 which is a circulation path of the cooling brine in the middle of a return path from the cold air generator 4 to the regenerator 3 in a showcase. In order to produce cooling air to be used for cooling the first, the first brine that has been sufficiently cooled is preferentially used, and then the first brine whose temperature has slightly increased is used.
This is because it is sufficient to produce the cooling air for air conditioning with the residual cooling of the brine, and to take into account the set temperature of the produced temperature-regulated air.

On the other hand, from the first additional cooling refrigerant pipe 10 formed between the first additional cooling exchanger 9 and the refrigeration cycle 2, another refrigerant having a refrigerant circulation pump 29 is provided. The pipe 28 is branched, and the refrigerant pipe 28 is provided with an additional cooling heat exchanger 30 for exchanging heat between the refrigerant and the air-conditioning brine. The heat exchanger 30 and the brine temperature control tank 21 are connected by two brine pipes 31 each having a pump 32, and the heat exchanger 30 and the brine temperature control tank are driven by the pump 32. The air-conditioning brine is circulated between the air conditioner and the air conditioner.

The heat exchangers 25 and 30 are heat exchangers used to cool the air-conditioning brine when the air conditioning units 20 perform the cooling operation. The air conditioning units 20 perform the heating operation. In this case, it is necessary to heat the air conditioning brine.

For this reason, the daytime cooling refrigeration cycle 2
In the middle of the pipe 12A leading to the condenser 2B for liquefying the high-temperature and high-pressure refrigerant via the compressor, heat exchange between the refrigerant and the heating brine is performed to heat the heating brine. An exchanger 33 is provided. Further, a pipe 34 for circulating a heating brine for exchanging heat with the refrigerant in the exhaust heat exchanger 33 is formed, and a first pipe is provided in the pipe 34 from the downstream side of the exhaust heat exchanger 33. The on-off valve 35, the auxiliary heat exchanger 36 for exchanging heat with hot water, the heating heat exchanger 37 for exchanging heat with the air-conditioning brine, the second on-off valve 38, and the heat energy of the heating brine. A heat storage tank 39 for storing heat in a heat storage material, and the pipe 3
Pumps 40 for circulating the heating brine are provided along the line 4, respectively.

The configuration of the heat storage tank 39 is the same as that of the cold storage tank. The material of the heating brine is the same as that of the air conditioning brine. However, since the heating brine is used only for heating and is more likely to deteriorate than the air conditioning brine, the heating brine is directly supplied to the brine temperature control tank 21. Try not to reach.

The pipe 34 is provided with the exhaust heat exchanger 33.
A short-circuit pipe 41 that connects the downstream side of the heat storage tank 39 and the upstream side of the heat storage tank 39 is connected, and the short-circuit pipe 41 is also provided with an on-off valve 42.

The open / close valves 35 and 38 of the pipe 34 and the open / close valve 42 of the short-circuit pipe 41 are closed when the open / close valves 35 and 38 are open, and the open / close valves 35 and 38 are closed. When the heating is in operation, the on-off valves 42 are opened, and during the heating operation, the on-off states are controlled to be opposite to each other.

The auxiliary heat exchanger 36 is connected to a pipe 44 for exchanging hot water heated by the boiler 43 with the heating brine in the pipe 34. Is provided with a pump 45 for circulating hot water. The boiler 43 is used to supplement the heat energy of the heat storage material in the heat storage tank 39 when the heat energy is insufficient as a heating heat source.

Further, a pipe 46 provided with a pump 47 for circulating the air-conditioning brine is provided between the heating heat exchanger 37 and the brine temperature adjusting tank 21.

Further, in the refrigeration air conditioner of this embodiment, an air conditioning pipe 51 is connected to the collection pipe 16 for collecting the air used for cooling from the showcase 1 so as to be branched. The end of the piping 51 is connected to an air-conditioning cool air discharge unit 52 disposed in the store S so as to have a fan and discharge the cooling air collected from the showcase 1 into the store S. Further, between the branch of the collection pipe 16 and the air conditioning pipe 51 and the cold air generator 4, a collection air supply pipe 53 is further provided.
The other end of the collection air supply pipe 53 is connected to an indoor air suction unit 54 arranged in the store S for collecting air in the store S. . The air-conditioning pipe 51 and the collection air supply pipe 5
3. A damper 55 is provided between the branch point of the air conditioning pipe 51 of the recovery pipe 16 and the branch point of the recovery air replenishment pipe 53 as shown in FIG. These dampers 55 are provided as an example of a valve member, and control the discharge amount of the recovered air in accordance with the temperature in the store S.
The amount of air collected from the store S is controlled in proportion to the discharge amount. In addition, only the cooling air from the recovery pipe 16 is discharged from the cooling air discharge unit 52 for air conditioning without providing the above-mentioned brine temperature control tank 21 and each air conditioning unit 20, and a substantially equal amount of indoor air is sucked into the indoor air. A simple air-conditioning system can be configured even if the air is sucked from the unit 54.

Next, according to the refrigeration and air-conditioning method using the refrigeration and air-conditioning apparatus described above, cooling air for the showcase is produced, the showcase is cooled, and the inside of the store S where the showcase is disposed is cooled. To begin with, a description will be given of a case where cooling air for air conditioning is manufactured.

First, by driving the daytime cooling refrigeration cycle 2, the low-temperature and low-pressure liquid refrigerant is circulated through the pipe 12 to the evaporator as the heat exchanger 6.
The heat is exchanged with the first brine circulating in the pipe 14 from the cold storage tank 3 by driving the pump 7, and the first brine is cooled to −30 ° C. to −35 ° C.

In the cold storage tank 3, thus, -3
With the first brine cooled to 0 ° C. to −35 ° C., the second brine adjusted to freeze at −25 ° C. to −30 ° C. slightly higher than the first brine (for example, the first brine).
Assuming that the brine is a calcium chloride solution, the second brine freezes the regenerative member filled with a preparation mainly composed of sodium nitrate and water. In the case where the temperature of the regenerator is higher than that of the regenerator due to the degree of cooling being somewhat loosened by the first brine being circulated and used for heat exchange of cooling air for cooling each showcase 1. In turn, this will function to cool the calcium chloride solution, which is the first brine.

The regenerative member in which the second brine is frozen in the container takes a large amount of latent heat from the object of heat exchange while the second brine continues to thaw, so that the daytime cooling refrigeration cycle 2 is always operated. There is no need to keep driving. That is, only when the first brine has reached a temperature at which the cool air generator 4 cannot generate cooling air at a predetermined temperature, the daytime cooling refrigeration cycle 2 and the pump 3 are driven, and if necessary, The first brine is cooled by opening / closing an on-off valve (not shown) provided.

Therefore, using inexpensive midnight power,
For example, by driving the daytime cooling refrigeration cycle 2 for 10 hours from 22:00 to 8:00 in the morning of the next day, the cold storage member installed in the cold storage tank 3 is sufficiently frozen, and The operation of the daytime cooling refrigeration cycle 2 is stopped to perform the heat storage operation in the first brine and the second brine, and only when the temperature of the first brine exceeds a set temperature, the daytime cooling refrigeration cycle 2 is stopped. Can be driven.

Further, if a plurality of kinds of regenerative members are provided in the regenerator 3 in which a plurality of kinds of second brines having different freezing temperatures are enclosed in a plurality of containers, respectively. Since a plurality of kinds of melting temperatures of the regenerative members can be obtained, a time difference occurs at the time of melting, so that the first brine can be stably kept cold for a long time.

The first brine thus cooled to a low temperature in the cold storage tank 3 is stored in the daytime, for example, when the first brine is opened.
The driving of the pump 8 disposed in the pipes 18, 18,... Is started before the time, and is supplied to the cooling fin coil 61 (FIG. 2) as a heat exchanger of the cold air generator 4.

At this time, in the present embodiment, in the first additional cooling heat exchanger 9 provided in the pipe 18,
It is possible to cause direct heat exchange between the refrigerant of the daytime cooling refrigeration cycle 2 and the first brine, for example,
As an emergency cooling method when the temperature of the cold stored first brine becomes high, the first brine can be additionally cooled.

In the cool air generator 4, as shown in FIG.
The cooling liquid stored in 3 is pre-cooled. Then, the spray pump 65 is driven to spray a cooling liquid (for example, a propylene glycol solution) from the storage tank 63 via the spray pipe 64 to the spray nozzle 62 disposed above the cooling fin coil 61. From the cooling liquid generator 4
The cooling fin coil 6
-10 ° C. to -20 ° C. by contact with 1
Cool. In addition, the cooling liquid may be sprayed in a shower shape, or may be sprayed (sprayed) in a mist shape.

Then, the recovered air at 0 ° C. to 5 ° C. as the medium to be cooled recovered through the recovery pipe 16 is supplied from the upstream side of the air flow path in the cold air generator 4 to the parallel side. A direction orthogonal to the cooling fin coil 61, the cooling liquid applied to the cooling fin coil 61, and the cooling liquid sprayed in the air, flowing between the cooling fin coils 61 toward the downstream of the flow path. And the heat is exchanged by contacting the collected air to -12.
Cool to a temperature of between -15 ° C and -15 ° C. Here, the reason why the cooling liquid is sprayed is to make good contact between the cooling liquid and the cooling fin coil 61 or the recovered air. In addition, at the time of contact between the cooling liquid and the collected air, the water contained in the collected air is robbed by the cooling liquid and removed.
The removal of moisture from the recovered air is necessary to prevent frost formation in the supply pipe 17 and each showcase 1.

The cooling air is supplied to the supply pipe 17.
The cooling of the showcase is performed by supplying to each showcase 1 via the.

The cooling liquid sprayed in the cool air generator 4 and exchanging heat with the collected air and absorbing the moisture contained in the collected air is stored in a storage tank 63 provided at the bottom of the cool air generator 4. To be collected. At this time, the cooling liquid applied to the outer peripheral surface of the cooling fin coil 61 is cooled by performing heat exchange by contact with the cooling fin coil 61, and also contacts the collected air to cool the collected air. While being applied, it is collected in the storage tank 63 arranged below.

In this way, the collected cooling liquid is uniformly sprayed again from the spray nozzle 62 into the cool air generator 4 via the water spray pipe 64, and is used for cooling and dehumidifying the collected air. Further, a part of the collected cooling liquid is finally heated to 70 ° C. to 80 ° C. by passing through the heat exchangers 75A, 75B, and 75C of the pipe 73A by driving the circulation pump 74. After that, pipe 73A
Through the spray nozzle 68 of the moisture removing device 66 into the heat exchange chamber 67. By spraying the cooling liquid heated to a high temperature in the air as described above, the moisture of the recovered air contained in the cooling liquid is evaporated, and the spray nozzle 6 is sprayed.
The air is exhausted by passing through an eliminator 69 disposed above the eliminator 8. Then, the heated cooling liquid is collected again in the evaporating storage tank 70, kept in the heated state for about 1 hour, and further concentrated by evaporating the water content. A part of the cooling liquid composed of the heated and concentrated propylene glycol liquid is sprayed again from the spray nozzle 68 through the spraying pipe 71 having the concentration circulation pump 72 from the evaporation storage tank 70. By repeating a series of circulations, the degree of concentration can be increased.

When a part of the heated coolant is supplied to the storage tank 63 of the cool air generator 4 through the pipe 73B, the coolant is passed through the heat exchanger 75A, The heat is released by performing heat exchange with the cooling liquid passing through. Then, in the storage tank 63, the concentrated cooling liquid is mixed with the remaining cooling liquid to reduce the water content of the cooling liquid supplied from the storage tank 63 to the spray nozzle 62, and the water content of the recovered air due to the cooling liquid is reduced. Improve the absorption of The precooling of the mixed cooling liquid at the room temperature is as described above.

On the other hand, in the cooling heat exchanger 25 disposed in the pipe 18, the pump 27 is driven to circulate the air conditioning brine between the brine temperature control tank 21 and the cooling heat exchanger 25. In addition, heat exchange is performed between the cooling brine and the air-conditioning brine, and the cooled air-conditioning brine is temporarily stored in the brine temperature control tank 21. At this time, since the cooling brine to be heat-exchanged with the air-conditioning brine is the return brine used for generating the cooling air for cooling the respective showcases 1, the temperature of the cooling air is determined by the cooling of the respective showcases 1. It is hotter than when it is served. Therefore, heat exchange was performed with this cooling brine,
The temperature of the air-conditioning brine stored in the brine temperature control tank 21 is controlled and controlled by, for example, inverter-controlling the rotation speed of the pump 27 so that the temperature for cooling is about 0 to 8 ° C. This temperature is controlled by the brine temperature control tank 2
Is operated by detecting the temperature of the air-conditioning brine in the brine temperature control tank 21 that has become a uniform temperature by being stirred by the thermistor. When the temperature of the air conditioning brine in the brine temperature control tank 21 rises, in the present embodiment, the pump 32 of the pipe 31 is driven to add the air conditioning brine in the brine temperature control tank 21 to the second addition. By circulating through the cooling heat exchanger 30 and exchanging heat with the air conditioning brine and the refrigerant of the daytime cooling refrigeration cycle 2, a desired temperature is forcibly obtained.

In this way, the air-conditioning brine in the brine temperature control tank 21 controlled to the desired temperature is supplied to the heat exchanger () of each air-conditioning unit 20 disposed in the store S via the supply pipe 22. (Not shown), and in the air conditioning unit 20, heat exchange is performed between room air supplied by a fan (not shown) and air conditioning brine circulating in the heat exchanger, thereby adjusting the temperature to a temperature suitable for cooling. The temperature of the air in the store S can be controlled by producing the produced air and supplying it to the air conditioner in the store S.

The air-conditioning brine is circulated by detecting the temperature in the store and controlling the number of revolutions of a pump 23 disposed in the supply pipe 22 by an inverter.

By preventing the temperature of the air-conditioning brine stored in the brine temperature control tank 21 from being set to 0 ° C. or lower, it is possible to prevent frost formation on each of the air-conditioning units 20 disposed in the store S. be able to. When the set temperatures of the individual air conditioning units 20 are made different, the number of rotations of the air circulation fan in each air conditioning unit 20 is adjusted, or the air conditioning brine in each air conditioning unit 20 is introduced. It can be adjusted by controlling an on-off valve (not shown) provided in the introduction pipe 22A to control the supply amount of the air-conditioning brine.

Further, at night, the product outlet of each showcase 1 is covered with a night cover or the like, and not only does the outside temperature drop than daytime,
Since the number of people coming and going is reduced, the temperature in the store S changes at a low temperature, the temperature change is small, and the range of the temperature change in the showcase 1 is small. Therefore, the temperature management of the showcase 1 of the whole store S is performed by producing the cooling air by driving the small night cooling refrigeration cycle 5 separately provided for night management, and the daytime cooling refrigeration cycle 2 is controlled.
Drives only the heat storage for the production of the daytime cooling air, as described above. On the other hand, if the air conditioning in the store S at night is required, if cooling at night is required, the cooling air collected from the collection pipe 16 after cooling each showcase 1 is directly supplied from the cooling air discharge unit 52 for air conditioning to the inside of the store S. To cool the inside of the store S. At this time,
The temperature of the air used for cooling the collected showcase 1 is rising, and does not become a minus temperature. Therefore, it is possible to prevent frost from forming on the cooling air discharge unit 52 for air conditioning. Can be.

When the recovered air is used for air conditioning as described above, the same amount of air in the store S as the amount discharged from the indoor air suction unit 54 through the recovered air replenishing pipe 53 is supplied. It is introduced into the recovery pipe 16, and the recovered air which is recovered in the cold air generation chamber 4 and exchanges heat with the cooling liquid is supplemented. At this time, the opening and closing of the damper 55 is controlled to control the discharge amount of the collected air in accordance with the temperature in the store S, and the amount of air collected from the store S is controlled in accordance with the discharge amount. This is as described above.

In this way, not only the cooling brine and refrigerant of the refrigeration air conditioner but also the cooling air of the showcase can be effectively used, and the energy required for cooling can be saved.

Next, the temperature controlled air for cooling the showcase 1 is produced to cool the showcase,
In order to heat the store S where the showcase was arranged,
The case of producing warm air for air conditioning will be described. In addition,
The cooling air for cooling the showcase 1 is controlled and manufactured by the daytime cooling refrigeration cycle 2 in the same manner as described above, and the description thereof is omitted.

When heating the inside of the store S in winter, first, both the on-off valves 35 and 38 of the pipe 34 are closed, and the on-off valve 42 of the short-circuit pipe 41 is opened. When the pump 40 is driven and the daytime cooling refrigeration cycle 2 is driven using nighttime electric power, the waste heat exchanger 33 sets the high-temperature and high-pressure refrigerant of the daytime cooling refrigeration cycle 2 (hereinafter, the high-temperature refrigerant). ), Heat is exchanged with the heating brine circulating through the exhaust heat exchanger 33, the on-off valve 42, and the heat storage tank 39 by driving the pump 40, and the heating brine is heated to a high temperature.
After passing through the exhaust heat exchanger 33, the high-temperature refrigerant is further reduced in temperature and pressure by an air-cooled condenser as the condenser 2B.

On the other hand, the heated brine is
By driving the pump 40, the exhaust heat exchanger 33 and the on-off valve 42
And passes through the heat storage tank 39,
When passing through, heat energy is applied to the heat storage member in the heat storage tank 39. The temperature of the heat storage member stored in the heat storage tank 39 is controlled to be about 65 ° C. at night.

In the daytime, the on-off valves 35 and 38 of the pipe 34 are opened, the on-off valve 42 of the short-circuit pipe 41 is closed, and the pump 40 of the pipe 34 is driven, so that the The heating brine is stored in the heat storage tank 39.
And circulation to the heating heat exchanger 37.
At this time, the brine temperature control tank 21 and the heating heat exchanger 3
7 so that the air-conditioning brine is circulated
6 is driven. Then, heat exchange between the heating brine heated by passing through the heat storage tank 39 and the air conditioning brine supplied from the brine temperature control tank 21 to the heating heat exchanger 37 is performed in the heating heat exchanger 37. In operation, the air conditioning brine is heated. By the heat exchange between the heating brine and the air-conditioning brine, the air-conditioning brine is heated to a temperature higher than a set temperature in the room.

The air-conditioning brine, which has exchanged heat with the heating brine, is temporarily stored in the brine temperature control tank 21. At that time, the temperature is controlled to be 55 to 65 ° C. The temperature control is performed by inverter-controlling the rotation speed of the pump 47 according to the liquid temperature by a thermistor disposed in the brine temperature control tank 21. When the heat energy stored in the heat storage tank 39 decreases during the daytime heating and the temperature of the heating brine decreases, the boiler 43 is driven to operate the piping 4.
After increasing the temperature of the hot water circulating in the inside 4, the auxiliary heat exchanger 36 performs heat exchange between the hot water and the heating brine, heats the heating brine, and then heats the heating brine and the air conditioning brine. May be performed in the heating heat exchanger 37.

In this way, the air conditioning brine set at 55 to 65 ° C. in the brine temperature control tank 21 is supplied to the plurality of air conditioning units 20 arranged in the store S through the supply pipe 22. In this air-conditioning unit 20, heat is exchanged with room air in the same manner as in the case of producing the above-described cooling air to produce heating air at a desired temperature, and the air temperature in the store S is controlled. Heating can be provided.

When the refrigeration air conditioner of the present embodiment is used to control the air temperature in order to cool the inside of the store S, the air conditioning brine is used for the heating heat exchanger 37 described above.
The pump 47 in the pipe 46 connecting the heating heat exchanger 37 and the brine temperature control tank 21 may be stopped so that the air is not supplied to the store S. In order to control the air conditioning brine, the piping connecting the cooling heat exchangers 25 and 30 and the brine temperature control tank 21 respectively so that the air conditioning brine is not supplied to the cooling air heat exchangers 25 and 30 described above. 26, 31
Drive of the pumps 27 and 32 may be stopped.

As described above, according to the refrigeration / air-conditioning method using the refrigeration / air-conditioning apparatus of the present embodiment, the production of the cooling air for cooling the showcase and the desired temperature for controlling the air temperature of the store S or the like are performed. The production of air can always be performed in one refrigeration air conditioner regardless of the season or time.

The air-conditioning brine supplied to the air-conditioning unit 20 in the store S for cooling the inside of the store S effectively utilizes the cooling brine used for cooling the showcase, and its temperature is controlled by the air-conditioning system. Temperature is controlled so that frost is not generated in the air conditioning unit 20, which is sufficient for producing cooling air for air conditioning. The air-conditioning brine supplied to the air conditioning unit 20 in the store S to heat the inside of the store S effectively utilizes the high-temperature refrigerant of the refrigeration cycle used for cooling the showcase,
Furthermore, by driving the daytime cooling refrigeration cycle 2 using nighttime electric power, not only the cost of manufacturing the cooling air for the showcase but also the cost required for cooling the store S during the day can be reduced. It becomes possible.

The present invention is not limited to the above-described embodiment, and can be variously modified as needed.

For example, according to the size of the store and the necessity, the control of the air temperature in the store is performed by using the cooling air used for cooling the showcase using the above-described cool air discharge unit and indoor air suction unit. It is also possible to adopt only the control method. Further, as a cooling device for cooling, not only the showcase described in the embodiment, but also other devices such as a refrigerator-freezer and a vending machine can be applied.

[0114]

As described above, according to the refrigeration air conditioner and the refrigeration air conditioning method according to the present invention, a showcase,
Cooling of a cooling device such as a refrigerator and temperature management in a store can be centrally controlled by a single device using only one refrigerator or heat source device. In addition to reducing the cost required for temperature management, the space for installing equipment for cooling the showcase and controlling the temperature in the store can be reduced, and furthermore, the air conditioning unit in the store This prevents the formation of frost and makes it easier to maintain.

In particular, according to the refrigeration air conditioner of the second aspect,
The cooling device and the heat source for the indoor cooling and heating, the cold storage device, and the like can be shared to perform cooling of the cooling device and indoor air conditioning.

According to the refrigeration air conditioner of the third aspect,
Cooling of the room can be efficiently performed by using the cooling brine having a relatively high temperature after producing the cooling air for cooling the cooling device.

Further, according to the refrigerating air conditioner of the fourth aspect, the latent heat stored in the heat storage material by the late night power can be used for daytime heating.

Further, according to the refrigeration air conditioner of the fifth aspect, since the heating brine is separated from the air conditioning brine, only the heating brine which is easily deteriorated by heating can be replaced alone.

Further, according to the refrigeration air conditioner of claim 6,
Even when the heat source is insufficient, the heating can be stably performed by the hot water of the boiler.

Further, according to the refrigeration air conditioner of the present invention, the first brine is additionally cooled using the refrigerant of the refrigeration cycle, so that the cooling equipment can be stably operated even if the heat energy for cooling in the regenerator is insufficient. In addition, the room can be cooled.

Furthermore, according to the refrigeration air conditioner of the present invention, even if the heat energy for cooling in the brine temperature adjusting tank is insufficient, the cooling equipment and the room can be stably cooled.

Further, according to the refrigeration air conditioner of the ninth aspect,
Air conditioning temperature control for cooling and heating can be performed under appropriate temperature management using the temperature detecting means.

Further, according to the refrigeration air conditioner of the tenth aspect, the main cooling unit is driven by midnight power for cold storage or the like in the middle of the night to prepare for cooling and air conditioning of daytime cooling equipment. By driving the cooling unit for cooling at night to cool the cooling equipment at midnight, it is possible to effectively use the electric power at midnight.

Further, according to the refrigeration air conditioner of the present invention, it is possible to cool the room by the brine in the brine temperature control tank and to directly supply the cooling air collected in the recovery pipe to the cooling in the room. .

According to the refrigeration air conditioner of the twelfth aspect, the room can be directly cooled by the cooling air collected in the collection pipe.

On the other hand, according to the refrigeration and air-conditioning method of the present invention, the cooling air having a higher temperature is additionally cooled, so that the cooling air is produced while controlling the temperature so as to obtain the cooling air of a desired temperature. can do.

According to the refrigeration / air-conditioning method of the fifteenth aspect, by additionally cooling the air-conditioning brine whose temperature has risen, the temperature is controlled so that air-conditioning cooling air at a desired temperature can be obtained. Cooling air can be produced.

Further, according to the refrigeration and air-conditioning method of the present invention, the cooling air can be produced by controlling the temperature of the cooling air for cooling the cooling equipment using the cooling brine, and the cooling air-conditioning brine can be produced. By cooling or heating the room, the room can be cooled or heated.

Further, according to the refrigeration and air conditioning method of the seventeenth aspect, even when the heat source is insufficient, the heating can be stably performed by the hot water of the boiler.

Further, according to the refrigeration and air conditioning method of the eighteenth aspect, the air used for cooling the cooling equipment is effectively used,
Cooling air for indoor cooling can be produced.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of a refrigeration air conditioner to which a refrigeration air conditioning method of the present invention is applied.

FIG. 2 is an explanatory diagram showing details of a main part of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Showcase 2 Daytime refrigeration cycle 3 Cold storage tank 4 Cold air generator 5 Nighttime refrigeration cycle 6 Heat exchanger 9 First additional cooling heat exchanger 10 First additional cooling pipe 16 Recovery pipe 17 Supply pipe 20 Air conditioning Unit 21 Brine temperature control tank 25 Heat exchanger for cooling 30 Heat exchanger for additional cooling 33 Exhaust heat exchanger 36 Auxiliary heat exchanger 39 Heat storage tank 43 Boiler 52 Cooling air discharge unit for air conditioning 54 Indoor air suction unit 61 Cooling fin coil 66 Water removal device S Store M Machine room

Claims (18)

[Claims] A plurality of cooling devices each having a cooling air outlet and a cooling air inlet; a refrigeration cycle circulating so as to cause a change in state of the refrigerant; and a cooling brine circulating with the refrigerant of the refrigeration cycle. A heat exchanger that performs heat exchange and cools the cooling brine;
A cooling unit comprising a cold storage tank for storing the cooled cooling brine, a cooling air generator for generating cooling air by heat exchange with the cooled cooling brine, and cooling the cooling air produced in the cold air generating device to each of the cooling units. Cooling of cooling equipment comprising a supply pipe for supplying air from a cooling air outlet of the equipment and a collecting pipe for collecting air supplied for cooling from a cooling air inlet of each cooling equipment to the cold air generator. At least one air conditioning unit, which is disposed in the room and generates desired temperature air by heat exchange with air conditioning brine, and is disposed in a cooling brine circulation path in the cooling unit, and the cooling brine is air-conditioned. A cooling heat exchanger that performs heat exchange with the cooling brine, and a cooling heat exchanger that is connected to each of the air conditioning units. Refrigeration air conditioning system, characterized in that having an indoor air-conditioning system including a brine temperature adjusting tank adjusting the temperature of the air-conditioning brine supplied to the respective air conditioning unit. 2. A refrigeration cycle circulating so as to cause a change in state of a refrigerant, a plurality of cooling devices each having a cooling air outlet and a cooling air intake, and a cooling brine circulating with the refrigerant of the refrigeration cycle. A heat exchanger that performs heat exchange and cools the cooling brine;
A cooling unit comprising a cold storage tank for storing the cooled cooling brine, a cooling air generator for generating cooling air by heat exchange with the cooled cooling brine, and cooling the cooling air produced in the cold air generating device to each of the cooling units. Cooling of cooling equipment comprising a supply pipe for supplying air from a cooling air outlet of the equipment and a collecting pipe for collecting air supplied for cooling from a cooling air inlet of each cooling equipment to the cold air generator. At least one air conditioning unit, which is disposed in the room and generates desired temperature air by heat exchange with air conditioning brine, and is disposed in a cooling brine circulation path in the cooling unit. A cooling heat exchanger for exchanging heat with a cooling brine; and a high-temperature refrigerant and a air conditioner for a refrigeration cycle in the cooling unit. An exhaust heat exchanger for exchanging heat with brine; selectively connected to one of the cooling heat exchanger and the exhaust heat exchanger and connected to each of the air conditioning units and supplied to each of the air conditioning units. A refrigeration air conditioner comprising an indoor air conditioning system comprising a brine temperature control tank for controlling the temperature of the air conditioning brine. 3. The cooling heat exchanger according to claim 1, wherein the cooling heat exchanger is disposed in the circulation path of the cooling brine in a path from the cool air generator to the cold storage tank. A refrigerated air conditioner as described. 4. A heat storage material for storing heat energy of air-conditioning brine heated by the exhaust heat exchanger in a brine circulation path between the exhaust heat exchanger of the indoor air conditioning system and the brine temperature control tank. The refrigeration air conditioner according to claim 2, wherein a heat storage tank for storing heat is provided. 5. A heating system that uses a dedicated heating brine as a brine circulating through the exhaust heat exchanger and the heat storage tank of the indoor air conditioning system, and performs heat exchange between the heating brine and the air conditioning brine. The refrigeration air conditioner according to any one of claims 2 to 4, further comprising a heat exchanger. 6. The boiler for heating water is provided, and an auxiliary heat exchanger for exchanging heat between the hot water heated by the boiler and the heating brine is provided. Refrigerated air conditioner. 7. Heat exchange between the cooled brine and the refrigerant of the refrigeration cycle is performed in a circulation path for circulating the cooling brine from the cold storage tank to the cold air generator in the cooling unit, and The refrigeration air conditioner according to any one of claims 1 to 6, further comprising a first additional cooling heat exchanger for further cooling. 8. The indoor air conditioning system performs a heat exchange between an air conditioning brine supplied to the brine temperature control tank and a refrigerant of a refrigeration cycle in the cooling unit, and further cools the cooling brine. The refrigeration air conditioner according to any one of claims 1 to 7, further comprising a cooling heat exchanger. 9. A temperature detecting means for detecting the temperature of the stored air-conditioning brine, and a stirring fan for stirring the stored air-conditioning brine, are provided in the brine temperature adjusting tank. The refrigeration air conditioner according to any one of claims 1 to 8, wherein 10. A refrigeration cycle that circulates in the cool air generator so as to cause a change in state of the refrigerant, and heat exchange between the refrigerant of the refrigeration cycle and the circulating cooling brine to cool the cooling brine. The refrigeration air conditioner according to any one of claims 1 to 9, further comprising a nighttime cooling unit having a cooling unit. 11. An air-conditioning cool air discharge unit and an indoor air suction unit are branched and connected to a collection pipe for collecting air used for cooling from each of the cooling devices to the cool air generator, and these air-conditioning cool air discharge units are connected. And a valve member capable of mutually proportionally controlling the air flow rate in the indoor air intake unit and the indoor air intake unit.
0. The refrigeration air conditioner according to any one of 0. 12. A refrigeration cycle having a plurality of cooling devices each having a cooling air outlet and a cooling air inlet, a refrigeration cycle circulating so as to cause a state change of the refrigerant, and a cooling brine circulating with the refrigerant of the refrigeration cycle. A heat exchanger that performs heat exchange and cools the cooling brine;
A cooling unit comprising a cold storage tank for storing the cooled cooling brine, a cooling air generator for generating cooling air by heat exchange with the cooled cooling brine, and cooling the cooling air produced in the cold air generating device to each of the cooling units. Cooling of cooling equipment comprising a supply pipe for supplying air from a cooling air outlet of the equipment and a collecting pipe for collecting air supplied for cooling from a cooling air inlet of each cooling equipment to the cold air generator. A valve member that is provided with a system, and that a cooling air discharge unit for air conditioning and an indoor air suction unit are branched and connected to the collection pipe, respectively, and that the air flow rate can be controlled in proportion to the cold air discharge unit for air conditioning and the indoor air suction unit. Refrigeration air conditioner, characterized in that: 13. Cooling the cooling brine by exchanging heat with a refrigerant of a refrigeration cycle in a cooling source disposed separately from each cooling device, storing the cooling brine in a cold storage tank, and storing the cold brine in a cold air generator. Heat is exchanged between the cooled brine and the cooling equipment and the recovered air collected in the cool air generator through the recovery pipe, and the cooling air is supplied to each cooling equipment via the supply pipe at a temperature lower than the set temperature of each cooling equipment. Cooling air for cooling the cooling equipment to be cooled, and cooling the air-conditioning brine to a temperature lower than a set temperature in a room by replacing the cooling air with the cooling brine in a circulation path of the cooling brine in the cooling source. The brine was stored in a brine temperature control tank, and the temperature of the air conditioning brine was adjusted to a desired temperature lower than the indoor set temperature. Circulates supplying brine for the air conditioning in the indoor air-conditioning unit, wherein the air conditioning unit, refrigeration air conditioning method, characterized by producing a cooling air for indoor air conditioning by heat exchange with the air-conditioning brine and the indoor air. 14. The cooling brine stored in the cold storage tank is subjected to heat exchange again with the refrigerant of the refrigeration cycle before being supplied to a cool air generator in a circulation path thereof, and is additionally cooled. Item 14. The refrigeration and air conditioning method according to item 13. 15. The refrigeration and air conditioning method according to claim 13, wherein the brine for air conditioning stored in the brine temperature control tank is subjected to heat exchange with a refrigerant of a refrigeration cycle again to be additionally cooled. 16. After cooling a cooling brine by heat exchange with a refrigerant of a refrigeration cycle in a cooling source disposed separately from each cooling device, the cooling brine is stored in a regenerator and stored in a cool air generator. Heat is exchanged between the cooled brine and the cooling equipment and the recovered air collected in the cool air generator through the recovery pipe, and the cooling air is supplied to each cooling equipment via the supply pipe at a temperature lower than the set temperature of each cooling equipment. In order to selectively produce cooling air or heating air for room air-conditioning, in addition to producing cooling air for cooling equipment to be cooled, by replacing the cooling brine with the cooling brine in a circulation path of the cooling brine in the cooling source. After cooling the air-conditioning brine to a temperature lower than the set temperature in the room, the air-conditioning brine is stored in a brine temperature control tank, and the air-conditioning brine is stored. After the temperature of the air conditioning unit is adjusted to a desired temperature lower than the indoor set temperature, the air conditioning brine is circulated and supplied to an indoor air conditioning unit. The cooling air for indoor air-conditioning is produced by replacement, or after heating the heating brine to a high temperature by exchanging heat with a high-temperature and high-pressure refrigerant in the refrigeration cycle of the cooling source, After heating the air-conditioning brine to a temperature higher than the indoor set temperature by heat exchange, the air-conditioning unit supplies the air to the indoor air-conditioning unit, and in the air-conditioning unit, heat exchanges the indoor air with the air-conditioning brine by exchanging heat with the room air. A refrigeration air conditioning method characterized by being manufactured. 17. The heating brine is further heated by exchanging heat with hot water heated by a boiler before being subjected to heat exchange with air conditioning brine in a circulation path thereof. The refrigeration and air conditioning method according to 1. 18. After cooling a cooling brine by exchanging heat with a refrigerant of a refrigeration cycle in a cooling source disposed separately from each cooling device, the cooling brine is stored in a regenerator and stored in a cool air generator. Heat is exchanged between the cooled brine and the cooling equipment and the recovered air collected in the cool air generator through the recovery pipe, and the cooling air is supplied to each cooling equipment via the supply pipe at a temperature lower than the set temperature of each cooling equipment. In addition to producing cooling air for cooling the cooling equipment to be cooled, a cooling air discharge unit for air conditioning and an indoor air suction unit are branched and connected to the collection pipe, respectively, and cooling of the collection pipe from the air conditioning cool air discharge unit to the room is performed. Supplying air, and recovering approximately the same amount of room air as the cooling air supplied to the room from the room air suction unit to the recovery pipe. Refrigeration air conditioning how to.