KR20130035045A - System low temperature refrigerator having uniform refrigerant flow - Google Patents

Abstract

PURPOSE: A system low temperature refrigerator having a smooth refrigerant flow is provided to transfer a refrigerant discharged from an evaporator to a compressor, thereby increasing the viscosity of the refrigerant. CONSTITUTION: A recovering pipe structure of a system low temperature refrigerator(100) includes a compressor(10) and evaporators of a plurality of storage units. A recovering pipe(60) includes a main recovering pipe and an auxiliary recovering pipe. The main recovering pipe is connected to the compressor. The auxiliary pipe is branched from the main recovering pipe, is respectively connected to the evaporators, and has a diameter smaller than that of the main recovering pipe. [Reference numerals] (10) Compressor; (20) Condenser; (41) First storage; (42) Second storage; (43) Third storage; (44) n-th storage;

Description

System low temperature refrigerator having uniform refrigerant flow

The present invention relates to a system cold storage, and more particularly to a system cold storage having a recovery pipe piping structure that can facilitate the flow of the low-pressure refrigerant recovered from the plurality of storage to the compressor.

Typically, cold storage is a box-shaped device for storing food or medicine at low temperatures, and includes a refrigerator and a freezer. A refrigerator is a device for storing food or drugs at low temperature so as not to cool or rot. A freezer is a device for storing food or medicine while maintaining a low temperature below freezing point. The cold storage is composed of a storage compartment and a cooling device, and is cooled by using ice, electricity, and gas. Each of these cold reservoirs includes a compressor, a condenser, and an evaporator, and according to the principle of the refrigeration cycle, a device for lowering the temperature inside the reservoir to facilitate storage and storage.

Recently, various kinds of cold storages specialized for low temperature storage of the corresponding products in optimum state according to kinds of cold storage products, for example, food, kimchi, wine, clothing, medicine, etc., have been used.

As the demand for various low-temperature storage for each household uses increases, noise is generated by driving individual compressors, and power consumption is increased due to excessive design. In addition, the heat generated from the condenser installed in each individual low-temperature storage cell is acting as a factor to increase the room temperature.

The use of different compressors, depending on the increasing number of cold storages in the home, is currently expected to reduce power consumption in the home to address the environmental problems of emissions of carbon dioxide (CO ₂ ) from 2008 through 2012 under the Kyoto Protocol. need.

Therefore, such a problem may act as a big obstacle for future home appliance development and operation, and it is urgent to prepare a technical alternative.

In order to solve this problem, a system low temperature reservoir having a structure in which a plurality of reservoirs are connected to one compressor is introduced. In such a system cold storage, the high pressure refrigerant is provided to the evaporator of the plurality of reservoirs through a condenser in one compressor, and the low pressure refrigerant is recovered to the compressor through a pipe. As a discharge tube for discharging the refrigerant from the compressor and a recovery tube for recovering the refrigerant, a pipe having a constant inner diameter is used.

In this case, since the high pressure refrigerant moves in the discharge pipe, the refrigerant can move smoothly without a great influence on the inner diameter of the discharge pipe. However, in the case of the recovery pipe, since the low pressure refrigerant moves, a difference occurs in the amount of the refrigerant to be recovered depending on the distance of the recovery pipe between the compressor and the plurality of reservoirs. As a result, an imbalance occurs in the circulation of the refrigerant, causing a difference in the cooling efficiency of the plurality of reservoirs, and a problem in that the load of the compressor increases.

In order to solve this problem, it is possible to consider a method of installing an electromagnetic expansion valve in the recovery pipe respectively connected to the plurality of evaporators. However, in this case, a cost problem occurs due to the installation of an expensive electronic expansion valve to correspond to the number of the plurality of evaporators. In addition, there is a hassle to control the valves installed in the recovery pipe together with the valves installed in the respective discharge pipes into which refrigerant is injected into the plurality of evaporators.

Accordingly, an object of the present invention is to provide a system cold storage having a piping structure that allows the refrigerant to move smoothly in the recovery pipe even without installing a separate valve.

Another object of the present invention is to provide a cold storage system having a piping structure in which the refrigerant discharged from the plurality of reservoirs is recovered to the compressor through the recovery pipe at a uniform speed.

In order to achieve the above object, the present invention is a recovery pipe piping structure of the system cold storage is connected to each of the compressor and the evaporator installed in the plurality of reservoirs, the recovery tube has an inner diameter inversely proportional to the distance between the compressor and the plurality of reservoirs. Provide return pipe piping structure for system cold storage.

In the recovery pipe piping structure of the system cold storage according to the present invention, the recovery pipe is connected to the main recovery pipe and the main recovery pipe branched from the main recovery pipe connected to the compressor, respectively, the main recovery pipe Rather, it may include a plurality of auxiliary recovery pipes having a smaller inner diameter.

In the recovery pipe piping structure of the system cold storage according to the present invention, the plurality of auxiliary recovery pipe may have an inner diameter which is inversely proportional to the distance between the plurality of reservoirs and the compressor to which the plurality of auxiliary recovery pipes are respectively connected.

In the recovery pipe piping structure of the system cold storage according to the present invention, the main recovery pipe and the plurality of auxiliary recovery pipe may each have a predetermined inner diameter.

The present invention also provides a system cold storage comprising a compressor, a condenser, a plurality of valves, a plurality of reservoirs, a discharge tube and a recovery tube. The compressor compresses a gaseous refrigerant into a gas of high temperature and high pressure. The condenser condenses the compressed refrigerant. The plurality of valves expand the condensed refrigerant discharged from the condenser and discharge the refrigerant to a low temperature low pressure refrigerant. The plurality of reservoirs are connected to the plurality of valves, respectively, and are installed separately from the compressor and the condenser. Each of the plurality of reservoirs includes an evaporator for lowering the internal temperature while vaporizing the low temperature low pressure refrigerant. The discharge pipe supplies the refrigerant discharged from the compressor to the evaporator of the plurality of reservoirs through the condenser and the plurality of valves. The recovery pipe connects the evaporator and the compressor of the plurality of reservoirs, sends a gaseous refrigerant discharged from the evaporator to the compressor, and has an inner diameter inversely proportional to the distance between the compressor and the plurality of reservoirs.

In the system cold storage system according to the present invention, the recovery pipe is connected to the main recovery pipe connected to the compressor, and the main recovery pipe branched from each of the plurality of reservoir evaporators, each having a smaller inner diameter than the main recovery pipe It may include a plurality of auxiliary recovery pipe.

In the system cold storage system according to the present invention, the plurality of auxiliary recovery pipes may have an inner diameter that is inversely proportional to the distance between the plurality of reservoirs and the compressor to which the plurality of auxiliary recovery pipes are respectively connected.

In the system cold storage according to the present invention, the main recovery pipe and the plurality of auxiliary recovery pipes may each have a predetermined inner diameter.

In the system reservoir according to the present invention, by installing a recovery pipe having an inner diameter inversely proportional to the distance between the compressor and the plurality of reservoirs, the refrigerant discharged from the evaporators of the plurality of reservoirs can be smoothly moved to the compressor. That is, the flow rate of the refrigerant can be relatively increased by forming a narrow inner diameter of the recovery pipe located relatively far from the compressor, and conversely, the flow rate of the refrigerant is relatively reduced by forming a narrow inner diameter of the recovery pipe located relatively near the compressor. Since it can be reduced, it can be smoothly recovered to the compressor as a whole when viewed as a whole recovery pipe connected between the compressor and the plurality of reservoirs.

Thus, even without installing a separate valve, it is possible to smoothly maintain the flow of the refrigerant discharged from the evaporator of the plurality of reservoirs, thereby smoothing the circulation of the refrigerant through the recovery pipe to improve the cooling efficiency in the plurality of reservoirs, thereby The load on the compressor can be reduced.

1 is a block diagram illustrating a system cold storage having a smooth refrigerant flow according to an embodiment of the present invention.

In the following description, only parts necessary for understanding the embodiments of the present invention will be described, and the description of other parts will be omitted so as not to obscure the gist of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a system cold storage having a smooth refrigerant flow according to an embodiment of the present invention.

Referring to FIG. 1, the system cold storage 100 according to the present embodiment includes a compressor 10, a condenser 20, a plurality of valves 30, a plurality of storages 40, a discharge pipe 50, and a recovery pipe ( 60, the components including the compressor 10 and the condenser 20 managing to keep the plurality of reservoirs 40 at a low temperature have a structure installed separately from the plurality of reservoirs 40.

The compressor 10 receives a gaseous refrigerant discharged from the evaporators 45, 46, 47, and 48 installed in the plurality of reservoirs 40, compresses the gas to a high temperature and high pressure, and discharges it to the condenser 20. The condenser 20 condenses the compressed refrigerant supplied from the compressor 10.

Here, the high temperature and high pressure refrigerant discharged from the compressor 10 is in a gaseous state. This gaseous refrigerant is liquefied in the condenser 20 to turn into a liquid having a low temperature, for example about 40 ° C. The condenser 20 discharges heat generated in the process of liquefying the refrigerant in the gas state to the outside through the surface.

The plurality of valves 30 expand the condensed refrigerant discharged from the condenser 20 and discharge the condensed refrigerant from the condenser 20 to the evaporators 45, 46, 47, and 48 of the reservoir 40, respectively. At this time, the refrigerant coming out of the condenser 20 is high pressure, so the boiling point is difficult to change to gas. Therefore, the valve 30 converts the high pressure refrigerant into a low temperature low pressure refrigerant by using Bernoulli's principle and provides the same to the evaporators 45, 46, 47, and 48.

The plurality of reservoirs 40 are connected to the plurality of valves 30, respectively, and are installed separately from the compressor 10 and the condenser 20. Evaporators 45, 46, 47, and 48 are provided. At this time, the evaporator 45, 46, 47, 48 is a portion which lowers the temperature inside the reservoir 40 while the low temperature low pressure refrigerant evaporates, and discharges the gaseous refrigerant to the compressor 10. For example, the plurality of reservoirs may be used for a freezer, a refrigerator, a wine cellar, a rice refrigerator, a kimchi refrigerator, a clothes refrigerator, and the like, but is not limited thereto.

The discharge pipe 50 and the recovery pipe 60 connect the compressor 10, the condenser 20, the plurality of valves 30, and the plurality of reservoirs 40 to provide a passage through which the refrigerant can be circulated. Copper pipes having high thermal conductivity are mainly used as the discharge pipes 50 and the recovery pipes 60 for circulating the refrigerant. However, in addition to copper materials, pipes made of metal or synthetic resin materials having high thermal conductivity such as aluminum and iron may be used. have.

The discharge pipe 50 is installed to supply the refrigerant discharged from the compressor 10 to the evaporators 45, 46, 47, and 48 of the plurality of reservoirs 40 through the condenser 20 and the plurality of valves 30. . At this time, since the high-pressure refrigerant is moved through the discharge pipe 50, a pipe having a constant inner diameter may be used as the discharge pipe (50).

The recovery pipe 60 connects the evaporators 45, 46, 47, and 48 of the plurality of reservoirs 40 and the compressor 10, and the gaseous refrigerant discharged from the evaporators 45, 46, 47, and 48. Is sent to the compressor (10). In particular, the recovery pipe 60 has an inner diameter which is inversely proportional to the distance between the compressor 10 and the plurality of reservoirs 40.

The system reservoir 100 according to the present embodiment is formed in such a recovery pipe 60 piping structure because the refrigerant discharged from the evaporators 45, 46, 47, 48 of the plurality of reservoirs 40 is compressed by the compressor 10. To move smoothly). That is, the flow rate of the refrigerant can be relatively increased by narrowing the inner diameter of the recovery pipe 60 located relatively far from the compressor 10. On the contrary, by narrowing the inner diameter of the recovery pipe 60 located relatively near the compressor 10, the flow velocity of the refrigerant can be relatively reduced. Therefore, the refrigerant may be recovered to the compressor 10 through the recovery pipe 60 as a whole when viewed as a whole of the recovery pipe 60 connected between the compressor 10 and the plurality of reservoirs 40.

In this way, if the inner diameter of the recovery pipe 60 is differentiated according to the distance, the refrigerant flowing into the compressor 10 may be introduced into the compressor 10 regardless of the distance, thereby allowing the evaporators 45, 46, 47, The efficiency of 48) can be improved, and the cooling efficiency can be improved by smoothing the cooling cycle as a whole.

The recovery pipe 60 is branched from the main recovery pipe 69 and the main recovery pipe 69 connected to the compressor 10, respectively, connected to the evaporators 45, 46, 47, 48 of the plurality of reservoirs 40, respectively. A plurality of auxiliary recovery pipe (61, 62, 63, 64). At this time, the auxiliary recovery pipe (61, 62, 63, 64) has a smaller inner diameter than the main recovery pipe (69). The plurality of auxiliary recovery pipes 61, 62, 63, and 64 have an inner diameter that is inversely proportional to the distance between the plurality of reservoirs 40 and the compressor 10 to which the plurality of auxiliary recovery pipes 61, 62, 63, and 64 are respectively connected. Have In addition, the main recovery pipe 69 and the plurality of auxiliary recovery pipes 61, 62, 63, and 64 may each have a predetermined inner diameter. Alternatively, the main recovery pipe 69 may have a form in which the inner diameter increases as the compressor 10 is closer to the compressor 10.

For example, when the plurality of reservoirs 40 are four (n = 4), the first to fourth reservoirs 41, 42, 43, and 44 are respectively provided in the evaporators 45, 46, 47, and 48. The fourth auxiliary recovery pipes 61, 62, 63, and 64 are connected, and the first to fourth auxiliary recovery pipes 61, 62, 63, and 64 are respectively connected to the main recovery pipe 69. The first reservoir 41 is installed closest to the compressor 10, and the second reservoir 42, the third reservoir 43, and the fourth reservoir 44 are next installed. In this case, assuming that the inner diameter of the main recovery pipe 69 is 1 inch, the fourth auxiliary recovery pipe 64 connected to the evaporator 48 of the fourth reservoir 44 located farthest from the compressor 10 is 1. / 5 inch, the third auxiliary recovery pipe 63 is 2/5 inch, the second auxiliary recovery pipe 62 is 3/5 inch, the first auxiliary recovery pipe 61 is 4/5 inch inner diameter Piping may be installed to have.

As described above, since the system cold storage 100 according to the present embodiment has an inner diameter that is inversely proportional to the distance between the compressor 10 and the plurality of storages 40, the evaporator of the plurality of storages 40 45, 46, 47, 48) can smoothly maintain the flow of the refrigerant discharged respectively. In addition, it is possible to improve the cooling efficiency in the plurality of reservoirs 40 by smoothly circulating the refrigerant through the recovery pipe 60, thereby reducing the load of the compressor 10.

On the other hand, although not shown, the system cold storage 100 according to the present embodiment includes a power supply for advancing power and a central controller for controlling the overall operation of the system cold storage 100. In addition, a unit controller that manages the temperature of the plurality of reservoirs 40 may be installed in each of the plurality of reservoirs 40, and the unit controller may exchange necessary information through communication with the central controller.

As described above, the embodiments disclosed in the specification and the drawings are only presented as specific examples for clarity and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: compressor
20 condenser
30: Valve
40: storage
60: recovery tube
100: System cold storage

Claims (8)

Recovery pipe piping structure of the system cold storage, respectively, connected to the compressor and the evaporator installed in the plurality of storage,
And the recovery pipe has an inner diameter that is inversely proportional to the distance between the compressor and the plurality of reservoirs. The method of claim 1, wherein the recovery pipe,
A main recovery pipe connected to the compressor;
A plurality of auxiliary recovery pipes branched from the main recovery pipe and connected to the evaporators of the plurality of reservoirs, respectively, and having a smaller inner diameter than the main recovery pipe;
Recovery pipe piping structure of the system cold storage, characterized in that it comprises a. The method of claim 2, wherein the plurality of auxiliary recovery pipe,
And an inner diameter inversely proportional to a distance between the plurality of reservoirs and the compressor to which the plurality of auxiliary recovery pipes are connected, respectively. The method of claim 3,
And the main recovery pipe and the plurality of auxiliary recovery pipes each have a predetermined inner diameter. A compressor for compressing the gaseous refrigerant into a gas of high temperature and high pressure;
A condenser to condense the compressed refrigerant;
A plurality of valves for expanding the condensed refrigerant discharged from the condenser and discharging the refrigerant as a low temperature low pressure refrigerant;
A plurality of reservoirs respectively connected to the plurality of valves and installed separately from the compressor and the condenser, each of the reservoirs having an evaporator for lowering an internal temperature while vaporizing the low temperature low pressure refrigerant;
A discharge pipe for supplying the refrigerant discharged from the compressor to the evaporators of the plurality of reservoirs through the condenser and the plurality of valves;
A recovery tube connecting the evaporators of the plurality of reservoirs to the compressor, sending a refrigerant in a gaseous state discharged from the evaporator to the compressor, and having an inner diameter inversely proportional to a distance between the compressor and the plurality of reservoirs;
System cold storage comprising a. The method of claim 4, wherein the recovery pipe,
A main recovery pipe connected to the compressor;
A plurality of auxiliary recovery pipes branched from the main recovery pipe and connected to the evaporators of the plurality of reservoirs, respectively, and having a smaller inner diameter than the main recovery pipe;
System cold storage comprising a. The method of claim 5, wherein the plurality of auxiliary recovery pipe,
And a plurality of auxiliary recovery pipes each having an inner diameter inversely proportional to a distance between the plurality of reservoirs and the compressor to which the plurality of auxiliary recovery pipes are connected. 5. The method of claim 4,
And the main recovery pipe and the plurality of auxiliary recovery pipes each have a predetermined inner diameter.

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