KR102475088B1 - Refregerant apparatus without refregerant recovery apparatus on the time of exchanging pump - Google Patents

Abstract

The present invention is formed to enable exchanging valves to be respectively installed in a suction end and a discharge end of a compressor, enable a valve 1 to be installed between the compressor and a condenser, enable a valve 2 to be installed between the condenser and a receiver, and enable an expansion valve to be installed between the receiver and an evaporator. The refrigerant device, enabling a heat exchanger to be installed between an outlet end of the evaporator and the suction end of the compressor, enables a refrigerant pipe 1 to be branched between the valve 1 and the exchanging valve to enable the refrigerant pipe to pass the heat exchanger and be merged to a refrigerant pipe between the valve 1 and the condenser and enables a refrigerant pipe 2 to be branched between the compressor and the heat exchanger to pass a reception pipe and be merged to the refrigerant pipe between the expansion valve and the evaporator. The present invention prevents a liquid loss during suction of the compressor generated during recovery of a refrigerant and stores and recovers the liquid refrigerant in the receiver.

Description

A refrigerant device that does not require a refrigerant recovery device when exchanging a compressor

The present invention relates to a refrigerant recovery device that does not require a refrigerant recovery device, which does not require a refrigerant recovery device that suctions and stores liquid refrigerant in a receiver without a separate device for recovering refrigerant necessary for compressor replacement or refrigerator relocation.

In general, household air conditioners, chillers for air conditioning, industrial refrigerators, etc. (hereinafter referred to as 'refrigerant-using devices') are always filled with a refrigerant, which is a medium that takes heat from a low-temperature object and transports it to a high-temperature object. .

In the past, when such refrigerant-using devices were discarded or repaired, the refrigerant charged in the device was often released into the atmosphere.

However, chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and hydrofluorocarbons (HFCs) refrigerants, which are mainly used as refrigerants, have a global warming potential (GWP) thousands of times higher than that of carbon dioxide (CO2), a representative greenhouse gas. .

Therefore, in recent years, it is mandatory to recover the refrigerant before discarding or repairing the equipment using the refrigerant worldwide in relation to the global warming problem.

In this way, in order to recover the refrigerant from the refrigerant using device, a device commonly called a refrigerant recovery device is required. Examples of such a refrigerant recovery device include Korean Patent Registration Nos. A refrigerant recovery, purification, supply device or a refrigerant recovery device is disclosed.

Since most refrigerant recovery devices use a method of recovering refrigerant in a gaseous state using a refrigerant compressor, there is a problem in that it takes a lot of time to recover refrigerant.

In order to solve this problem, recently, a method of recovering liquid refrigerant first and then recovering gaseous refrigerant has been used. In most cases, even after the liquid refrigerant recovery process is completed, liquid refrigerant is not completely recovered and remains in the pipe. Depending on the structure of the refrigerant-using equipment, there are many cases in which a large amount of liquid refrigerant remains.

In this case, there is a disadvantage in that the time required to recover the gas refrigerant after recovering the liquid refrigerant becomes longer.

That is, when the gaseous refrigerant is recovered while the liquid refrigerant remains, the temperature of the liquid refrigerant drops due to the heat of vaporization of the refrigerant over time, and when the refrigerant temperature drops to the boiling point, almost no evaporation occurs, so the suction pressure of the compressor drops. As a result, the refrigerant recovery time becomes very long.

In addition, the compression ratio rises due to the decrease in the suction pressure of the compressor, and if the compressor is operated for a long time with a very high compression ratio, the discharge temperature of the compressor rises very much, making it impossible to operate the compressor when the temperature exceeds a certain temperature (usually about 130 ° C). There are also problems with doing it.

In addition, conventionally, in order to recover the refrigerant of the refrigerating device, a separate refrigerant recovery device is purchased, coupled to the refrigerating device, and the refrigerant is recovered, but the refrigerant recovery device is expensive and has a problem of having to be purchased separately. .

Republic of Korea Patent Registration No. 10-1594119 (2016.02.12. Notice) Republic of Korea Patent Registration No. 10-1635703 (Announced on July 1, 2016)

The present invention has been made to solve the above problems, and an object of the present invention is to use a receiver included in a refrigerant device for refrigerant recovery when replacing a compressor or relocating a refrigerant device, so that a separate refrigerant recovery device is provided. It is to provide an unnecessary refrigerant system.

Another object of the present invention is to provide a refrigerant device that prevents liquid damage caused by suction of a compressor during refrigerant recovery and stores and recovers refrigerant in a liquid state in a receiver.

It will be explained below, and will be learned by examples of the present invention. Furthermore, the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

As a means for solving the above problems, the present invention installs exchange valves at the suction and discharge ends of the compressor, respectively; installing valve 1 between the compressor and the condenser; Install valve 2 between the condenser and receiver; Installing an expansion valve between the receiver and the evaporator; A refrigerant device that installs a heat exchanger between the suction end of the compressor at the outlet end of the evaporator branches the refrigerant pipe 1 between the valve 1 and the exchange valve, passes through the heat exchanger, and passes through the refrigerant pipe between the valve 1 and the condenser. Formed to merge, branch the refrigerant pipe 2 between the compressor and the heat exchanger, pass through the water supply pipe, and form to merge with the refrigerant pipe between the expansion valve and the evaporator; During normal operation of the refrigerant system, the exchange valve, valve 1, valve 2 and valve 3 are open, and valve 4, check valve 5 and check valve 6 are closed; When the compressor is replaced or the refrigerant device is moved to another location, valve 3 installed between the rear end of the receiver and the expansion valve is closed, and valve 1 is closed; By opening the valve 4 installed between the refrigerant pipes 1, the high-temperature and high-pressure refrigerant gas discharged from the compressor is formed to exchange with the refrigerant at the outlet of the evaporator while passing through the heat exchanger, so that the refrigerant on the suction side of the compressor is formed in a state to prevent damage to the compressor due to liquid refrigerant intake; The check valve 5 installed in the refrigerant pipe 2 is opened, and a part of the refrigerant sucked into the compressor is branched, and the low-temperature refrigerant is passed through the receiver by the pump, and the refrigerant flowing out from the outlet of the condenser and stored in the receiver is discharged. It is cooled and formed to be converted into a refrigerant in a liquid state, and the check valve 6 installed in the refrigerant pipe 2 is opened to flow into the evaporator inlet, and when the refrigerant is stored and recovered in the receiver, the exchange valve is closed, to isolate the compressor; It is to provide a refrigerant device that does not require a refrigerant recovery device when the compressor is replaced.

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As described above, the present invention has an effect of not requiring a separate refrigerant recovery device by using the receiver included in the refrigerant device for refrigerant recovery when replacing the compressor or relocating the refrigerant device.

In addition, there is an effect of preventing liquid damage caused by suction of the compressor, which occurs during refrigerant recovery, and storing and recovering refrigerant in a liquid state in the receiver.

1 is a schematic diagram showing a refrigerant flow state when replacing a compressor in a refrigerant device that does not require a refrigerant recovery device when replacing a compressor according to the present invention.
2 is a schematic diagram showing a refrigerant flow state during normal operation of a refrigerant system in which a refrigerant recovery device is not required when replacing a compressor according to the present invention.

Before describing various embodiments of the present invention in detail, it will be appreciated that the application is not limited to the details of the configuration and arrangement of components described in the following detailed description or shown in the drawings. The invention is capable of being implemented and practiced in other embodiments and of being carried out in various ways. Also, device or element orientation (e.g., "front", "back", "up", "down", "top", "bottom") The expressions and predicates used herein with respect to terms such as ", "left", "right", "lateral", etc. are only used to simplify the description of the present invention and related devices. Or it will be appreciated that it does not indicate or imply that an element simply must have a particular orientation. Also, terms such as “first” and “second” are used herein and in the appended claims for descriptive purposes and are not intended to indicate or imply relative importance or significance.

The present invention has the following features to achieve the above object.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in this specification and claims should not be construed as being limited to the usual or dictionary meaning, and the inventor appropriately uses the concept of the term in order to explain his/her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, various alternatives may be used at the time of this application. It should be understood that there may be equivalents and variations.

Looking at an embodiment according to the present invention,

Exchange valves 11 are installed at the suction and discharge ends of the compressor 10, respectively;
Install valve 1 (21) between the compressor (10) and the condenser (20);
Installing valve 2 (22) between the condenser (20) and the receiver (30);
Installing an expansion valve 40 between the receiver 30 and the evaporator 50;
Forming a refrigerant device 100 in which a heat exchanger 60 is installed between the suction end of the compressor 10 at the outlet end of the evaporator 50;
By branching the refrigerant pipe 1 (70) between the valve 1 (21) and the exchange valve 11,
It passes through the heat exchanger 60 and is formed to merge with the refrigerant pipe between the valve 1 (21) and the condenser 20,
The refrigerant pipe 2 (80) is branched between the compressor (10) and the heat exchanger (60), passes through the water solution pipe (30), and merges with the refrigerant pipe between the expansion valve (40) and the evaporator (50). form,
During normal operation of the refrigerant device 100
The exchange valve 11, valve 1 (21), valve 2 (22), and valve 3 (35) are open,
The valve 4 (75), the check valve 5 (81), and the check valve 6 (82) are closed,
When the compressor 10 is replaced or the refrigerant device 100 is moved to another location, the valve 3 (35) installed between the rear end of the receiver 30 and the expansion valve 40 is closed,
close the valve 1 (21);
By opening the valve 4 (75) installed between the refrigerant pipes 1 (70), the high-temperature and high-pressure refrigerant gas discharged from the compressor 10 passes through the heat exchanger 60, formed to exchange with the refrigerant to form the refrigerant on the suction side of the compressor 10 in a gaseous state to prevent damage to the compressor 10 due to liquid refrigerant suction;
The check valve 5 (81) installed in the refrigerant pipe 2 (80) is opened, and a part of the suction refrigerant of the compressor (10) is branched, and the low-temperature refrigerant is transferred to the receiver (30) by the pump (85). to cool the refrigerant flowing out from the outlet of the condenser 20 and stored in the receiver 30 to be converted into a refrigerant in a liquid state, and a check valve 6 (82) installed in the refrigerant pipe 2 (80) ) is opened to flow into the inlet of the evaporator 50 so that the refrigerant is stored and recovered in the receiver 30,
to close the exchange valve 11 and disconnect the compressor 10; It relates to a refrigerant device that does not require a refrigerant recovery device when replacing a compressor.

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Hereinafter, a refrigerant device that does not require a refrigerant recovery device when replacing a compressor according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2 .

In a general refrigerant system, when a compressor is replaced or a refrigerant unit is moved to another location, the compressor must be separated from the refrigerant unit, and refrigerant remaining in the compressor and refrigerant parts is prevented from leaking during the separation process. It is about a refrigerant system that does.

Conventionally, a refrigerant recovery device is purchased separately and coupled to the refrigerant device, but the refrigerant recovery device is expensive and it is not easy to couple it to the refrigerant device, so the present invention uses a receiver included in the refrigerant device. So, in the receiver

It is to form to store and recover the refrigerant, preferably to provide a refrigerant device formed to store and recover the refrigerant in the liquid phase to the receiver.

To this end,

the present invention

Exchange valves 11 are installed at the suction and discharge ends of the compressor 10, respectively, to separate or combine the compressor 10 from the refrigerant device 100 when necessary,

Install valve 1 (21) between the compressor (10) and the condenser (20);

Installing valve 2 (22) between the condenser (20) and the receiver (30);

Installing an expansion valve 40 between the receiver 30 and the evaporator 50;

It is characterized in that the refrigerant device 100 is formed in which the heat exchanger 60 is installed between the suction end of the compressor 10 at the outlet end of the evaporator 50.

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Technical features of the present invention

In the refrigerant device 100,

By branching the refrigerant pipe 1 (70) between the valve 1 (21) and the exchange valve 11,

It passes through the heat exchanger 60 and is formed to merge with the refrigerant pipe between the valve 1 (21) and the condenser 20,

The refrigerant pipe 2 (80) is branched between the compressor (10) and the heat exchanger (60), passes through the water solution pipe (30), and merges with the refrigerant pipe between the expansion valve (40) and the evaporator (50). is to form

here,

When the compressor 10 of the present invention is replaced or the refrigerant device 100 is moved to another location, the compressor 10 is operated,

By closing the valve 3 (35) installed between the rear end of the receiver 30 and the expansion valve 40, the refrigerant is not circulated and is stored and recovered in the receiver 30,

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close the valve 1 (21);

By opening the valve 4 (75) installed between the refrigerant pipes 1 (70), the high-temperature and high-pressure refrigerant gas discharged from the compressor 10 passes through the heat exchanger 60, It is formed to be interchanged with the refrigerant, and the refrigerant on the suction side of the compressor 10 is formed in a gaseous state to prevent damage to the compressor 10 due to liquid refrigerant suction.

This is because when the refrigerant gradually decreases toward the suction side of the compressor 10 and the refrigerant in a liquid state flows into the suction side, the compressor 10 is damaged. By exchanging heat with a liquid refrigerant, it is intended to be converted into a gaseous refrigerant.

In addition, other technical features of the present invention

The check valve 5 (81) installed in the refrigerant pipe 2 (80) is opened, and a part of the suction refrigerant of the compressor (10) is branched, and the low-temperature refrigerant is transferred to the receiver (30) by the pump (85). to cool the refrigerant flowing out from the outlet of the condenser 20 and stored in the receiver 30 to be converted into a refrigerant in a liquid state, and a check valve 6 (82) installed in the refrigerant pipe 2 (80) ) is opened so that it flows into the inlet of the evaporator 50.

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All the refrigerant flowing out from the outlet of the condenser 20 is stored and recovered in the receiver 30, and when the refrigerant in the gaseous state is stored among the refrigerants flowing out and stored from the outlet of the condenser 20, the receiver 30 stores the refrigerant. Since the efficiency of the refrigerant is reduced, it is characterized in that the refrigerant in the liquid state is stored and recovered as much as possible.

Here, when the refrigerant is stored and recovered in the receiver 30, the exchange valve 11 is closed and the compressor 10 is separated; It relates to a refrigerant device that does not require a refrigerant recovery device when replacing a compressor.

In addition,
During normal operation of the refrigerant device 100
The exchange valve 11, valve 1 (21), valve 2 (22), and valve 3 (35) are open,
When the valve 4 (75), the check valve 5 (81), and the check valve 6 (82) are closed, the normal operation of the refrigerant system is possible.

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As described above, although the present invention has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following by those skilled in the art to which the present invention belongs Of course, various modifications and changes are possible within the scope of equivalents of the claims to be described.

10: compressor 11: exchange valve
20: condenser 21: valve 1
22: valve 2 30: receiver
35: valve 3 40: expansion valve
50: evaporator
60: heat exchanger
70: refrigerant pipe 1 75: valve 4
80: refrigerant pipe 2
81: check valve 5 82: check valve 6
85: pump
100: refrigerant device

Claims (2)

Exchange valves 11 are installed at the suction and discharge ends of the compressor 10, respectively;
Install valve 1 (21) between the compressor (10) and the condenser (20);
Installing valve 2 (22) between the condenser (20) and the receiver (30);
Installing an expansion valve 40 between the receiver 30 and the evaporator 50;
Forming a refrigerant device 100 in which a heat exchanger 60 is installed between the suction end of the compressor 10 at the outlet end of the evaporator 50;
By branching the refrigerant pipe 1 (70) between the valve 1 (21) and the exchange valve 11,
It passes through the heat exchanger 60 and is formed to merge with the refrigerant pipe between the valve 1 (21) and the condenser 20,
The refrigerant pipe 2 (80) is branched between the compressor (10) and the heat exchanger (60), passes through the receiver (30), and merges with the refrigerant pipe between the expansion valve (40) and the evaporator (50). form,
During normal operation of the refrigerant device 100
The exchange valve 11, valve 1 (21), valve 2 (22), and valve 3 (35) are open,
Valve 4 (75), check valve 5 (81), and check valve 6 (82) installed between the refrigerant pipe 1 (70) are closed,
When the compressor 10 is replaced or the refrigerant device 100 is moved to another location, the valve 3 (35) installed between the rear end of the receiver 30 and the expansion valve 40 is closed,
close the valve 1 (21);
By opening the valve 4 (75), the high-temperature and high-pressure refrigerant gas discharged from the compressor 10 passes through the heat exchanger 60 and exchanges with the refrigerant at the outlet of the evaporator 50, so that the compressor ( The refrigerant on the suction side of 10) is formed in a gaseous state to prevent damage to the compressor 10 due to liquid refrigerant suction;
The check valve 5 (81) installed in the refrigerant pipe 2 (80) is opened, and a part of the suction refrigerant of the compressor (10) is branched, and the low-temperature refrigerant is transferred to the receiver (30) by the pump (85). to cool the refrigerant flowing out from the outlet of the condenser 20 and stored in the receiver 30 to be converted into a refrigerant in a liquid state, and a check valve 6 (82) installed in the refrigerant pipe 2 (80) ) is opened to flow into the inlet of the evaporator 50 so that the refrigerant is stored and recovered in the receiver 30,
to close the exchange valve 11 and disconnect the compressor 10; A refrigerant device that does not require a refrigerant recovery device when replacing a compressor, characterized in that made.

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