JPH07146048A - Structure of refrigerating circuit of refrigerating equipment in food store - Google Patents

Abstract

PURPOSE:To make a unit on the compressor side small in size, to save a space of a machine room, to cut down the material of a refrigerating piping and thereby to reduce the cost of the material of the piping by installing a receiver on the air-cooled condenser side. CONSTITUTION:A compressor 3 which compresses a refrigerant to be of high temperature and high pressure, an air-cooled condenser 4 which makes the refrigerant a condensate, a receiver 5 which stores the refrigerant made the condensate, an expansion valve which makes the condensate refrigerant easy to evaporate by reducing the pressure thereof and a cooling coil 6 which gasifies the refrigerant and cools down the surroundings by a latent heat of evaporation thereof are connected together by pipings and thereby a refrigerating circuit of a showcase 1 is constructed. The air-cooled condenser 4 is disposed outside a store and the receiver 5 is disposed in proximity to the condenser. Thereby a space of a machine chamber wherein the compressor is disposed is made small and thereby the area of a saleroom is increased. By disposing the air- cooled condenser and the receiver in proximity to each other, a liquid return pipe connecting them is shortened and the cost of a piping material is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating device such as a showcase and a refrigerator used for displaying and selling frozen and refrigerated foods such as fruits and vegetables, meat and fresh fish in food stores such as supermarkets and convenience stores. The present invention relates to a refrigerating circuit structure for cooling, and particularly to an arrangement structure of air-cooling condensers and receivers that constitute the refrigerating circuit.

[0002]

2. Description of the Related Art Conventionally, in food stores such as supermarkets, refrigerating devices such as showcases and refrigerators have been used to display frozen and chilled foods such as fruits and vegetables, meat and fresh fish.

The refrigerating circuit of this refrigerating apparatus generally has a compressor that compresses a refrigerant to a high temperature and a high pressure, an air-cooling condenser that condenses and liquefies the refrigerant, a receiver that stores the condensed and liquefied refrigerant, and a decompressor for the liquefied refrigerant. Then, an expansion valve (or a capillary tube) that facilitates evaporation is connected to a cooling coil that gasifies the refrigerant and cools the surroundings by latent heat of evaporation, and the refrigerant is flowed there.

FIGS. 5 and 6 show a refrigerating circuit structure of a conventional refrigerating machine in a general food store (however,
(Some piping is omitted.) The food store T is a food store T1 where a showcase 31 and a refrigerating device such as a refrigerator are arranged.
And a backyard T2 provided with a working room S, a refrigerating / freezing room, a machine room K, etc., are partitioned by a wall surface W, and a passage 32 is provided at some portion of the wall surface W for entering and exiting both. There is. Then, in the machine room K, the compressor 33 and the receiver 3
For example, a plurality of units 5 and 5 are installed as shown in FIG. 7, an air-cooled condenser 34 is installed outside the store, and a cooling coil 36 and an expansion valve (not shown) are built in each showcase 31. At the same time, the receiver 35 and the expansion valve are connected by the liquid outlet pipe 37, and the air cooling condenser 34 and the receiver 3
5 is connected to the liquid return pipe 38, the compressor 33 and the air-cooled condenser 34 are connected to the discharge pipe 39, and the cooling coil 36 and the compressor 33 are connected to the suction pipe 40.
Refrigerant is caused to flow in these refrigeration circuits to cool the refrigeration apparatus such as the showcase 31.

[0005]

In the cooling structure of the refrigeration system in which such a conventional compressor and receiver are combined and installed as one unit indoors (machine room), and the air-cooled condenser is installed outdoors, such a structure is mainly used. , There were the following problems. A large machine room space is required because multiple compressors and receivers are installed in the machine room (indoors). Therefore, the sales floor area of the food store is reduced accordingly. Refrigerant piping of the refrigeration circuit, liquid outlet pipe (receiver → expansion valve), liquid return pipe (air cooling condenser → receiver), discharge pipe (compressor → air cooling condenser), suction pipe (cooling coil → compressor) in order of size However, in the case of such a conventional refrigeration circuit, since the liquid return pipe becomes long, the piping material cost becomes high. In addition, in the case of a food store, a machine room where a refrigerator is installed is generally located in one place, whereas refrigeration equipment such as a cooling coil and a showcase having an expansion valve is installed in a wide area of the sales floor. Therefore, the distance between the liquid outlet pipe and the suction pipe is long and the piping material cost is high.

The present invention has been made in view of the above circumstances. By installing a receiver on the side of an air-cooled condenser, the unit on the compressor side can be downsized, the space of the machine room can be saved, and the material of refrigerant piping can be reduced. An object of the present invention is to provide a refrigerating circuit structure of a refrigerating device in a food store, which is intended to reduce piping material cost.

[0007]

The present invention adopts the following constitution in order to achieve the above object. First,
The invention according to claim 1 compresses a refrigerant to a high temperature and high pressure, an air-cooling condenser that condenses and liquefies the refrigerant, a receiver that stores the condensed and liquefied refrigerant, and a decompressed and evaporated liquefied refrigerant. In a refrigerating circuit structure of a refrigerating apparatus, which comprises an expansion valve or a capillary tube for facilitating and a cooling coil for gasifying a refrigerant and cooling the periphery with latent heat of vaporization, the air-cooled condenser and a receiver are arranged close to each other. Is. As a result, it is possible to reduce the size of the unit on the compressor side, save space in the machine room, reduce the refrigerant piping material, and reduce the piping material cost. By insulating the receiver with a heat insulating material or the like, it is possible to prevent a high pressure drop in winter and a liquid temperature rise in summer, and further improve the performance of the refrigeration circuit.

According to a second aspect of the present invention, in the refrigerating circuit structure of the refrigerating apparatus, one unit is formed by combining the air cooling condenser and the receiver. This unitization has the merit that the labor of piping of the air-cooled condenser and the receiver can be saved at the installation stage.

Further, in the invention described in claim 3, in the inventions of claims 1 and 2, the air-cooled condenser and the receiver are outdoors or in a well-ventilated room, and the compressor is separated from the indoor or outdoor air-cooled condenser and the receiver. It is characterized by being installed in each position.

[0010]

By arranging the air-cooled condenser and the receiver close to each other at a predetermined place outdoors or indoors, the space of the machine room in which the compressor is arranged can be narrowed, and the sales floor area can be widened accordingly. Further, by bringing the air-cooled condenser and the receiver close to each other, the liquid return pipe (the pipe size is large and the cost is high) connecting them can be shortened, so that the pipe material cost can be reduced. Moreover, according to this structure, the existing air-cooled condenser and receiver can be connected as they are.

Further, by combining the air-cooled condenser and the receiver into a unit, it is possible to save space in the machine room in which the compressor is arranged and to reduce the amount of refrigerant piping material, and at the same time, the labor of piping the air-cooled condenser and the receiver at the installation stage. Can be omitted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic plan view showing an example where a receiver is installed close to an air-cooled condenser installation place outside a food store, and FIG. 2 is a schematic view showing an example where a unit combining an air-cooled condenser and a receiver is installed outside a food store. Fig. 3 is a plan view, Fig. 3 is a cross-sectional view of the installation structure, and Fig. 4 is a side view showing an example in which a plurality of compressors are stacked in a machine room using a gantry to save space.

FIG. 1 shows an embodiment of the present invention. A food store T includes a food section T1 in which a showcase 1 and a refrigerating device such as a refrigerator are arranged, a work room S, a refrigerating / freezing room and a machine. A back yard T2 provided with a chamber K and the like is partitioned by a wall surface W, and some portions of the wall surface W are provided with passages 2 for entering and leaving both. The showcase 1 is used to cool, for example, meat, fresh fish, fruits and vegetables, and the refrigeration circuit for cooling the inside of the showcase 1 includes a compressor 3 that compresses a refrigerant to a high temperature and a high pressure, and the refrigerant thereof. Air-cooled condenser 4 for condensing and liquefying the refrigerant, receiver 5 for storing the condensed and liquefied refrigerant, and expansion valve or capillary tube (not shown) for decompressing the liquefied refrigerant to facilitate evaporation
And a cooling coil 6 which gasifies the refrigerant and cools the surroundings by latent heat of vaporization.

The compressors 3 are provided in the machine room K of the backyard T2 by stacking or arranging a plurality of units in parallel using the mount 11 (see FIG. 4), and the receiver 5 is located outdoors. It is provided close to the air-cooled condenser 4. Since the receiver 5 is not provided in the machine room K, a small space is required, and in particular, by stacking a plurality of compressors 3 in a stack, it is possible to further save space in the machine room.

In each of these refrigeration circuit components, a receiver 5 and an expansion valve are connected by a liquid outlet pipe 7, and an air-cooled condenser 4 is provided.
And the receiver 5 are connected by the liquid return pipe 8, and the compressor 3
The cooling coil 6 and the compressor 3 are connected by the suction pipe 10, and the cooling coil 6 and the compressor 3 are connected by the discharge pipe 9, and the refrigerant flows into the refrigeration circuit to cool the refrigeration system such as the showcase 1. ing. That is, the refrigerant flowing in these pipes 7, 8, 9 and 10 circulates in these refrigeration cycles while repeating four steps of compression, condensation, expansion and evaporation, and the temperature of the cooling coil 6 having a low temperature It serves to transfer heat to the high air cooled condenser 4. In other words, the low-temperature low-pressure liquid refrigerant discharged from the expansion valve and discharged to the cooling coil 6 having a low pressure takes heat inside the container to boil and evaporate to become a gas, which cools the inside of the container. The heat taken from the inside of the refrigerator by the cooling coil 6 and the heat applied for compression by the compressor 3 are released to the outside from the air-cooled condenser 4.

By the way, the refrigerant pipes of the refrigeration circuit thus constructed are the liquid outlet pipe 7 (receiver 5 → expansion valve), the liquid return pipe 8 (air cooling condenser 4 → receiver 5), and the discharge pipe 9.
(Compressor 3 → air-cooled condenser 4), suction pipe 10
The pipe size increases in the order of (cooling coil 6 → compressor 3), and the material cost also increases. Although the liquid return pipe becomes long when the receiver and the compressor are unitized as in the conventional piping structure, the liquid return pipe 8 becomes short according to this embodiment, so that the cost of the piping material is low.

In addition, in the case of the food store T, the machine room K in which the refrigerator (compressor 3) is installed is generally one place, whereas the freezing of the showcase 1 or the like having the cooling coil 6 and the expansion valve is common. Since the device is installed over a wide area of the sales floor T1, the distance between the liquid outlet pipe and the suction pipe is long and the piping material cost is high with the conventional piping structure. However, according to this embodiment, the showcase 1 By installing the air-cooled condenser 4 and the receiver 5 at the outdoor closest to the refrigerating device, the liquid outlet pipe 7 can be shortened in pipe length and the refrigerant pipe cost can be reduced.

2 and 3 show another embodiment of the present invention, in which the outdoor air-cooled condenser 4 is used.
Although the receiver 5 is disposed close to the receiver, in the present embodiment, the air-cooled condenser 4 and the receiver 5 are combined to form one unit.

That is, in the food store T, a food section T1 in which a showcase 1 and a refrigerating device such as a refrigerator are arranged, and a backyard T2 in which a work room S, a refrigerating / freezing room, a machine room K and the like are provided are wall surfaces W. A partition 2 is provided, and some portions of the wall surface W are provided with passages 2 for entering and exiting both sides. The refrigeration circuit that cools the inside of the showcase 1 includes a compressor 3 that compresses a refrigerant to a high temperature and a high pressure, an air-cooling condenser 4 that condenses and liquefies the refrigerant, a receiver 5 that stores the condensed and liquefied refrigerant, and a liquefaction. It is composed of an expansion valve or a capillary tube (not shown) that reduces the pressure of the refrigerant to facilitate evaporation, and a cooling coil 6 that gasifies the refrigerant and cools the surroundings by latent heat of evaporation.

The compressor 3 has a backyard T
Space is saved by stacking multiple units or arranging them in parallel in the second machine room K (see FIG. 4).
The receiver 5 is combined with the outdoor air-cooled condenser 4 to form one unit. By unitizing in this way, the labor of piping of the air-cooled condenser 4 and the receiver 5 in the field can be saved.

In each of these refrigeration circuit components, the unitized air-cooling condenser 4 and receiver 5 are connected by the liquid return pipe 8, the receiver 5 and the expansion valve are connected by the liquid outlet pipe 7, and the compressor 3 and The air-cooled condenser 4 is the discharge pipe 9
The cooling coil 6 and the compressor 3 are connected to the suction pipe 1.
The refrigerating apparatus such as the showcase 1 is cooled by flowing the refrigerant in these refrigerating circuits.

Therefore, as described above, the refrigerant pipes are the liquid outlet pipe 7 (receiver 5 → expansion valve), the liquid return pipe 8 (air cooling condenser 4 → receiver 5), the discharge pipe 9 (compressor 3 → air cooling condenser 4), and suction. The pipe size increases in the order of the pipe 10 (cooling coil 6 → compressor 3) and the material cost increases, but according to the present embodiment, since the liquid return pipe 8 is short, the pipe material cost is low.

Further, in the case of the food store T, the machine room K in which the refrigerator (compressor 3) is installed is generally one place, whereas in contrast to this, the freezing of the showcase 1 having the cooling coil 6 and the expansion valve is performed. Since the device is installed over a wide area of the sales floor T1, the distance between the liquid outlet pipe and the suction pipe is long and the piping material cost is high if the conventional piping structure is used. In addition, by installing the air-cooling condenser 4 and the receiver 5 in the outdoor closest to the refrigeration system such as the showcase 1, the piping length of the liquid outlet pipe 7 can be shortened and the refrigerant piping cost can be reduced.

When the compressor and the receiver are provided as a unit in the machine room as in the conventional case, if the outdoor air-cooled condenser is installed at a position lower than this unit,
Although a liquid pool is generated in the air-cooled condenser and the performance is lowered, in any of the above embodiments of the present invention, the air-cooled condenser 4 and the receiver 5 can be easily set to substantially the same level or the air-cooled condenser can be set at a high position. Therefore, there is no need to ask the positional relationship with the compressor 3.

Further, according to both of the embodiments of the present invention as described above, the receiver 5 is placed close to or combined with the air-cooled condenser 4 installed outdoors, so that the display area of the showcase 1 is not pressed. Moreover, since the pipe from the indoor to the outdoor is the liquid outlet pipe 7 having a small size, the refrigerant pipe construction can be inexpensive.

In these embodiments, the air-cooled condenser 4 and the receiver 5 are arranged outdoors, but at a position apart from the compressor 3 provided in the machine room K,
In addition, if it is a well-ventilated place, it can be installed inside the food store T. If it is installed indoors, the appearance of the store will look good.

[0027]

As described above, according to the present invention, as a refrigerating circuit structure of a refrigerating device in a food store, an air-cooled condenser and a receiver are arranged close to each other (Claim 1), or they are combined into one unit. (Claim 2), or the air-cooled condenser and the receiver are arranged outdoors or in a well-ventilated room and separated from the compressor (Claim 3). It plays.

When a plurality of compressors and receivers are installed in a machine room (indoors), a large machine room space is required. However, the present invention requires only a plurality of compressors to be installed. Since the space can be made smaller, the indoor space can be used more effectively, and the sales floor area of a food store can be particularly widened, so that the area efficiency of the store itself can be increased.

The refrigerant pipes of the refrigeration circuit are a liquid outlet pipe (receiver → expansion valve), a liquid return pipe (air cooling condenser → receiver), a discharge pipe (compressor → air cooling condenser), and a suction pipe (cooling coil → compressor) in this order. Although the size becomes large and the material cost becomes expensive, in the case of the conventional example, the liquid return pipe becomes long, whereas in the present invention, since the liquid outlet pipe becomes long and the liquid return pipe becomes short, the piping material cost becomes high. Become cheap.

In the case of a food store, a machine room where a refrigerator is installed is generally located in one place, whereas a refrigeration device such as a cooling coil and a showcase having an expansion valve is installed in a wide area of the entire sales floor. Therefore, the distance between the liquid outlet pipe and the suction pipe is long and the material cost is high. But,
In the case of the present invention, by installing the air-cooling condenser and the receiver in the outdoor closest to the equipment such as the showcase, the liquid outlet pipe distance can be shortened and the refrigerant pipe cost can be reduced.

When a machine room cannot be provided, a compressor and a receiver unit are housed in a refrigeration system such as a showcase, an air-cooled condenser is installed outdoors, and other refrigeration systems are cooled together within the capacity range of the compressor. However, in this case, the receiver is larger than the compressor and the unit itself becomes large, which may occupy the display area of the refrigerating device such as a showcase to be stored. However, in the present invention, since the receiver is placed close to or combined with the air-cooled condenser installed outdoors, it does not press the display area of the showcase, and the piping from the indoor to the outdoor has a small size. Since it is a liquid outlet pipe, refrigerant piping work can be made inexpensive.

In the case where the compressor and the receiver are unitized, if the air-cooled condenser is installed at a position lower than the unit, a liquid pool occurs in the air-cooled condenser and the performance deteriorates. However, in the present invention, the air-cooled condenser and the receiver have substantially the same level or Since the air-cooled condenser can be set at a high position, the positional relationship with the compressor does not matter.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an example in which a receiver is installed near an air-cooled condenser installation place outside a food store of the present invention.

FIG. 2 is a schematic plan view showing an example in which a unit in which an air-cooled condenser and a receiver are combined is installed outside a food store.

FIG. 3 is a cross-sectional view of the installation structure of the same.

FIG. 4 is an explanatory side view in which a plurality of compressors are stacked or arranged in parallel in a machine room using a mount to save space.

FIG. 5 is a schematic plan view showing a refrigerating circuit structure of a refrigerating device in a conventional general food store.

FIG. 6 is a transverse sectional view of the installation structure of the same.

FIG. 7 is an explanatory side view showing a state in which a plurality of compressor and receiver units are similarly arranged in parallel in the machine room.

[Explanation of symbols]

 1 Showcase 2 Passage 3 Compressor 4 Air-cooled condenser 5 Receiver 6 Cooling coil 7 Liquid outlet pipe 8 Liquid return pipe 9 Discharge pipe 10 Suction pipe 11 Mount T Food store T1 Sales floor T2 Backyard K Machine room W Wall surface

Claims (3)

[Claims] 1. A compressor that compresses a refrigerant to a high temperature and a high pressure, an air-cooling condenser that condenses and liquefies the refrigerant, a receiver that stores the condensed and liquefied refrigerant, and an expansion valve that decompresses the liquefied refrigerant to facilitate evaporation. Alternatively, in a refrigerating circuit structure of a refrigerating apparatus including a capillary tube and a cooling coil that gasifies a refrigerant and cools the surroundings by latent heat of vaporization, the air-cooled condenser and a receiver are arranged close to each other. Refrigerating circuit structure of a refrigerating machine in a food store. 2. A compressor for compressing a refrigerant to a high temperature and a high pressure, an air cooling condenser for condensing and liquefying the refrigerant, a receiver for storing the condensed and liquefied refrigerant, and an expansion valve for decompressing the liquefied refrigerant to facilitate evaporation. Alternatively, in a refrigerating circuit structure of a refrigerating apparatus including a capillary tube and a cooling coil that gasifies a refrigerant and cools the surroundings by latent heat of vaporization, one unit is configured by combining the air-cooling condenser and a receiver. A freezing circuit structure of a freezing device in a characteristic food store. 3. The air-cooled condenser and the receiver are installed outdoors or in a well-ventilated indoor, and the compressor is installed in a position apart from the air-cooled condenser and the receiver indoor or outdoor, respectively. Refrigerating circuit structure of a refrigerating machine in a food store.