KR101118913B1 - Air conditioner - Google Patents

Abstract

PURPOSE: An air conditioner is provided to simplify a device without an outdoor air supply device for condensing refrigerant by using refrigerant with low temperature and low pressure passing through a second expansion valve. CONSTITUTION: An air conditioner comprises a compressive unit(10), a condensing unit(20), a first expansion valve(30), an evaporation unit(40), a refrigerant circulating pipe(50), a branch pipe(60), and a second expansion valve(70). The compressive unit sucks refrigerant of the gas phase and compresses to high temperature and high pressure. The condensing unit condenses the compressed refrigerant of high temperature and high pressure. The first expansion valve decompresses the condensed refrigerant. The evaporation unit evaporates the decompressed refrigerant of low temperature and low pressure. The refrigerant circulating pipe successively connects the compressive unit, the condensing unit, the first expansion valve, and the evaporation unit. The branch pipe comprises a refrigerant supply line(61) and a refrigerant discharge line(62). The second expansion valve is connected to the supply line of the branch pipe and decompresses the condensed refrigerant by the condensing unit.

Description

Air conditioner {AIR CONDITIONER}

The present invention relates to a cooling device that can simplify the device by improving the refrigerant condensation method, and also to remove the outdoor unit by placing each component in one body.

In the technology about the air conditioner which let you remove an outdoor unit,

Korean Utility Model Registration No. 20-0442103 (published Oct. 1, 2008, hereinafter referred to as `` advanced technology '') `` Outdoor unit integrated air conditioner '' is presented.

The prior art

"A cooling circulation space in which indoor air is cooled by a blowing fan centered on an evaporator, and a cooling circulation space in which a compressor and the main condenser are cooled by outdoor air,

In the refrigerant line circulating through the compressor, the main condenser, the expansion valve and the evaporator, a primary condenser by condensate obtained from the evaporator and a secondary condenser by air cooling are respectively installed in the refrigerant line between the compressor and the main condenser.

The refrigerant line between the main condenser and the evaporator constitutes an expansion valve branched into a plurality of capillaries,

Some of the capillary tubes forming the expansion valve is connected to the refrigerant recovery line cooler installed separately in the refrigerant line between the evaporator and the compressor,

Even if the space occupied by the internal components that make up the air conditioner does not have enough space for installation, it is not restricted to dissipating heat generated from the condenser to the outside, thereby preventing overheating so that the temperature of the compressor itself does not rise above the allowable standard value. It is a technology that can improve the cooling performance by not interrupting the operation of the compressor during the operation of the air conditioner and causing no disruption to the service life.

The prior art is provided with a primary condenser using condensate, an air-cooled secondary condenser, and a separate cooler disposed between the evaporator and the compressor. However,

Since outdoor air must be introduced to cool the cooling circulation space, there is a problem that external air suction line and discharge line must be installed between the air conditioner and the wall as in the conventional integrated air conditioner.

In order to solve the above problems, the cooling device according to the present invention,

A compression unit for sucking the gaseous refrigerant and compressing it at high temperature and high pressure;

A condensation unit for condensing the refrigerant having a high temperature and high pressure compressed by the compression unit;

A first expansion valve for reducing the refrigerant condensed by the condensation unit;

An evaporation unit for evaporating a low temperature low pressure refrigerant decompressed by the first expansion valve;

A refrigerant circulation pipe that sequentially connects the compression unit, the condensation unit, the first expansion valve, and the evaporation unit;

A refrigerant supply line having one end branched from the circulation pipe connecting the compression unit and the condensation unit and the other end connected to the condensation unit, and one end connected to the condensation unit and the other end Branch piping consisting of a refrigerant discharge line connected to the circulation pipe connecting the evaporation unit and the compression unit; And

A second expansion valve connected to a supply line of the branch pipe and reducing the refrigerant condensed by the condensation unit;

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The condensation unit

A condensation pipe connected to the circulation pipe, and

A heat exchange chamber in which the condensation line is accommodated and connected to the branch pipe so that the low temperature low pressure refrigerant decompressed by the second expansion valve is retained;

And a control unit.

And an injection unit having a plurality of nozzles and disposed in a heat exchange chamber of the condensation unit, connected to a supply line of the branch pipe, and discharging the refrigerant of low temperature and low pressure by the second expansion valve toward the condensation pipe line. Characterized in that.

In addition, the condensation pipe of the condensation unit

An inlet and an outlet connected to the circulation pipe;

Two branches connected to each of said inlet and outlet, and

A plurality of heat exchange pipes 21d are formed to be bent several times in the form of "U" and are arranged to interconnect the two branches, respectively.

Characterized in that consisting of.

In addition, the main body having an inner receiving space is provided,

The compression unit, the condensation unit, the first expansion valve, the evaporation unit is characterized in that arranged in the receiving space of the body.

The cooling device according to the present invention,

The low temperature and low pressure refrigerant through the second expansion valve is used to condense the high temperature and high pressure refrigerant, thereby eliminating the need for a separate external air supply means for condensation of the refrigerant, thereby simplifying the installation and moving the device. .

In addition, there is an effect that the condensation performance is further improved by the injection unit.

In addition, as a plurality of heat exchange pipes are provided in the condensation pipe line to disperse the refrigerant, the condensation of the refrigerant is made more smoothly.

In addition, each component of the device is arranged in one main body has the effect of more easy installation and movement of the device.

1 is a system diagram of a cooling device according to an embodiment of the present invention.
Figure 2 is a perspective view of the condensation oil ‹› and the injection unit in the cooling apparatus according to an embodiment of the present invention.
3 is a sectional view of Fig. 2;
Figure 4 is a cross-sectional view showing a state in which each component of the cooling device according to an embodiment of the present invention is disposed in the main body.
5 is a system diagram of a cooling device according to another embodiment of the present invention.
6 is a schematic diagram illustrating a refrigerant flow in a cooling operation of a cooling apparatus according to another embodiment of the present invention.
FIG. 7 is a schematic diagram illustrating a refrigerant flow when a cooling device according to another embodiment of the present invention is heated.

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

As shown in Figure 1, the cooling device according to an embodiment of the present invention

Compression unit 10 for sucking the refrigerant in the gas state to compress at high temperature and high pressure,

Condensation unit 20 for condensing the refrigerant of the high temperature and high pressure compressed by the compression unit 10,

First expansion valve 30 for reducing the refrigerant condensed by the condensation unit 20,

Evaporation unit 40 for evaporating the refrigerant of the low temperature low pressure reduced by the first expansion valve 30,

Refrigerant circulation pipe 50 for sequentially connecting the compression unit 10, the condensation unit 20, the first expansion valve 30 and the evaporation unit 40,

A refrigerant supply line having one end branched from the circulation pipe 50 connecting the compression unit 10 and the condensation unit 20 and the other end connected to the condensation unit 20. 61 and a refrigerant discharge line 62 having one end connected to the condensation unit 20 and the other end connected to the circulation pipe 50 connecting the evaporation unit 40 and the compression unit 10. Branch piping 60 made of, and

It is connected to the supply line 61 of the branch pipe 60, and comprises a second expansion valve 70 for reducing the refrigerant condensed by the condensation unit 20.

Here, the compression unit 10, the first expansion valve 30 and the evaporation unit 40 are respectively applied to the compressor (compressor), expansion valve (expansion valve) and evaporator (evaporator) of the conventional cooling device, for this Detailed illustration and description will be omitted.

And the second expansion valve 70 is applied to a well-known expansion valve in the same manner as the first expansion valve 30, on the basis of this on the supply line 61 located on the compression unit 10 side solenoid valve ( V1) is installed to adjust the flow rate of the refrigerant flowing into the second expansion valve 70 through the branch pipe (60).

In addition, as shown, on the circulation pipe 50, a known oil separator 51, a receiver tank 52, a sight glass 54, and an accumulator 55 and the like can be provided.

If you look briefly at them,

The oil separator 51 is disposed between the compression unit 10 and the condensation unit 20, and is mixed with the refrigerant when the refrigerant is discharged from the compression unit 10 to the condensation unit 20. The lubricating oil of the compression unit 10 is removed and returned to the compression unit 10 again.

As illustrated, the oil separator 51 may be disposed such that the refrigerant discharged from the compression unit 10 passes through the refrigerant before being branched by the branch pipe 60.

The receiver 52 is disposed between the condensation unit 20 and the first expansion valve 30, and temporarily stores the refrigerant condensed by the condensation unit 20 to be consumed by the evaporation unit 40. As much refrigerant is supplied to the first expansion valve (30).

The filter drier 53 is disposed between the receiver 52 and the first expansion valve 30 to remove moisture and various foreign substances from the refrigerant.

The sight glass 54 is disposed between the filter drier 53 and the first expansion valve 30, so that the amount of refrigerant charge and moisture in the air conditioner can be checked.

The liquid separator 55 is disposed between the evaporation unit 40 and the compression unit 10, and separates the liquid refrigerant not completely evaporated from the evaporation unit 40, so that the liquid refrigerant is sucked into the compression unit 10. To prevent it.

As shown in the liquid separator 55, both the refrigerant passing through the evaporation unit 40 through the circulation pipe 50 and the refrigerant passing through the condensation unit 20 through the branch pipe 60 are all present. It is preferable to arrange | position so that it can be transited.

In this case, the receiver 52, the filter drier 53, and the sight glass 54 may be changed in the order in which they are disposed within a range disposed between the condensation unit 20 and the first expansion valve 30. have.

The key point of the present invention lies in the structure of the condensation unit 20.

Hereinafter, the condensation unit 20 will be described in detail with reference to FIGS. 2 and 3.

The condensation unit 20 is

A condensation pipe passage 21 connected to the circulation pipe 50, and

The heat exchange chamber 22 accommodates the condensation pipe passage 21 and is connected to the branch pipe 60 so that the low temperature low pressure refrigerant decompressed by the second expansion valve 70 is retained.

It is made, including.

That is, the high temperature and high pressure refrigerant supplied to the condensation line 21 through the circulation pipe 50 passes through the second expansion valve 70 and exchanges heat with the low temperature low pressure refrigerant supplied to the heat exchange chamber 22. As it condenses.

Here, the condensation pipe passage 21 has two inlets 21a and an outlet 21b connected to the circulation pipe 50, two branches 21c connected to each of the inlet 21a and the outlet 21b, and “ Consists of a plurality of heat exchange pipe (21d) consisting of a copper tube bent several times in the form of U "and arranged to connect the two branches 21c, respectively.

As a result, the high temperature and high pressure refrigerant supplied through the inlet 21a is dispersed by the branch portion 21c and the plurality of heat exchange pipes 21d to increase the heat exchange efficiency, thus making the refrigerant more condensed. You lose.

In addition, as a means for further increasing the heat exchange efficiency, a plurality of heat exchange fins 21e arranged along the longitudinal direction may be formed on the outer circumferential surface of the heat exchange pipe 21d as shown in "A" of FIG. 3. .

The heat exchange chamber 22 is made of a pressure vessel made of aluminum or an alloy thereof, and a heat insulating member 22a may be attached to the outside thereof as necessary.

And, as shown, the condensation unit 20 is provided with a spray unit 80 having a plurality of nozzles 81 and disposed inside the heat exchange chamber (22).

The injection unit 80 is connected to the supply line 61 of the branch pipe 60 to discharge the low-temperature low-pressure refrigerant by the second expansion valve 70 toward the condensation pipe line 21, Accordingly, the heat exchange efficiency is increased to further improve the condensation performance.

On the other hand, as shown in Figure 4 the cooling device of the present invention is further provided with a main body 90 having an internal accommodating portion 91,

At this time, the compression unit 10, the condensation unit 20, the first expansion valve 30 and the evaporation unit 40 is disposed in the inner receiving portion (91).

That is, the above-described components of the present invention have a structure in which all of the main body 90 is provided,

In this case, in the condensation unit 20, the low temperature low pressure refrigerant through the second expansion valve 70 is used to condense the high temperature and high pressure refrigerant, so that a separate air supply means for condensation of the refrigerant is not necessary and the apparatus is simplified. It is easy to install and move the device.

Hereinafter, a cooling apparatus according to another embodiment of the present invention will be described with reference to FIGS. 5 to 7.

As shown in Figure 5, the cooling device according to another embodiment of the present invention has a cooling, heating combined structure consisting of the cooling line 50A and the heating line 50B.

In addition, for this purpose, the circulation pipe 50 switches the flow path so that the refrigerant having a high temperature and high pressure by the compression unit 10 is selectively supplied to the condensation unit 20 or the evaporation unit 40. Four way valve (V2), and

A plurality of cooling valves V3 and heating valves V4 which are opened and closed to operate in opposite directions according to the switching operation of the four-way valve V2 are further provided.

As a result, the cooling device according to another embodiment of the present invention having such a configuration is shown in FIGS. 6 and 7 according to the operation of the four-way valve V2, the cooling valve V3, and the heating valve V4. It can be operated by cooling operation or heating operation.

That is, when the refrigerant of the high temperature and high pressure by the compression unit 10 to the condensation unit 20 by the four-way valve (V2), as shown in Figure 6, each of the cooling valve (V3) Open, each of the heating valve (V4) is closed,

Accordingly, the high temperature and high pressure refrigerant introduced into the condensation unit 20 is passed through the cooling line 50A to the filter drier 53, the sight glass 54, the receiver 52, and the first expansion valve 30. The cooling operation is performed by sequentially passing through the evaporation unit 40, the four-way valve V2, the liquid separator 55, and the compression unit 10.

At this time, the branch pipe 60 is branched from the circulation pipe 50 connecting the four-way valve (V2) and the condensation unit 20, the solenoid valve (V1) and the first to the branch pipe (60). The second expansion valve 70 is installed to condense the high temperature and high pressure refrigerant introduced into the condensation unit 20 by using the low temperature and low pressure refrigerant by the second expansion valve 70.

In addition, when the refrigerant of the high temperature and high pressure by the compression unit 10 is supplied to the evaporation unit 40 by the four-way valve (V2), as shown in Figure 7, the solenoid valve (V1) and the Each cooling valve V3 is closed, and each heating valve V4 is opened,

Accordingly, the high temperature and high pressure refrigerant introduced into the evaporation unit 40 is heat-exchanged with indoor air, and then passes through the filter dryer 53, the sight glass 54, the receiver 52, and the first through the heating line 50B. The heating operation is achieved by sequentially passing through the two expansion valves 70, the condensation unit 20, the liquid separator 55, and the compression unit 10.

In the above description of the present invention with reference to the accompanying drawings, but described mainly with a "cooling device" having a specific shape and structure, the present invention can be variously modified and changed by those skilled in the art, such variations and modifications of the present invention It should be interpreted as being within the scope of protection.

10; Compression unit
20; Condensing unit
21; Condenser
21a; Inlet 21b; exit
21c; Branch 21d; Heat exchanger pipe
21e; Heat exchange fins
22; Heat exchange chamber
22a; Insulation member
30; 1st expansion valve
40; Evaporation unit
50; Circulation piping
60; Branch piping
61; Supply line 62; Discharge line
70; 2nd expansion valve
80; Injection unit
81; Nozzle
90; main body
91; Housing space

Claims (4)

delete A compression unit 10 for sucking the gaseous refrigerant and compressing it at high temperature and high pressure;
A condensation unit 20 for condensing the refrigerant having a high temperature and high pressure compressed by the compression unit 10;
A first expansion valve (30) for reducing the refrigerant condensed by the condensation unit (20);
An evaporation unit (40) for evaporating the refrigerant of low temperature and low pressure reduced by the first expansion valve (30);
A refrigerant circulation pipe (50) for sequentially connecting the compression unit (10), the condensation unit (20), the first expansion valve (30), and the evaporation unit (40);
A refrigerant supply line having one end branched from the circulation pipe 50 connecting the compression unit 10 and the condensation unit 20 and the other end connected to the condensation unit 20. 61 and a refrigerant discharge line 62 having one end connected to the condensation unit 20 and the other end connected to the circulation pipe 50 connecting the evaporation unit 40 and the compression unit 10. Branch pipe 60 made of; And
A second expansion valve (70) connected to the supply line (61) of the branch pipe (60) and configured to reduce the refrigerant condensed by the condensation unit (20);
The condensation unit 20 is
A condensation pipe passage 21 connected to the circulation pipe 50, and
It includes a heat exchange chamber 22 is accommodated in the condensation pipe passage 21, connected to the branch pipe 60, the low-temperature low-pressure refrigerant is decompressed by the second expansion valve 70,
The heat exchange chamber 22 has a plurality of nozzles 81 and is connected to the supply line 61 of the branch pipe 60 to the low temperature by the second expansion valve 70 toward the condensation pipe path 21 Cooling device, characterized in that the injection unit 80 for discharging the low-pressure refrigerant is disposed.
A compression unit 10 for sucking the gaseous refrigerant and compressing it at high temperature and high pressure;
A condensation unit 20 for condensing the refrigerant having a high temperature and high pressure compressed by the compression unit 10;
A first expansion valve (30) for reducing the refrigerant condensed by the condensation unit (20);
An evaporation unit (40) for evaporating the refrigerant of low temperature and low pressure reduced by the first expansion valve (30);
A refrigerant circulation pipe (50) for sequentially connecting the compression unit (10), the condensation unit (20), the first expansion valve (30), and the evaporation unit (40);
A refrigerant supply line having one end branched from the circulation pipe 50 connecting the compression unit 10 and the condensation unit 20 and the other end connected to the condensation unit 20. 61 and a refrigerant discharge line 62 having one end connected to the condensation unit 20 and the other end connected to the circulation pipe 50 connecting the evaporation unit 40 and the compression unit 10. Branch pipe 60 made of; And
A second expansion valve (70) connected to the supply line (61) of the branch pipe (60) and configured to reduce the refrigerant condensed by the condensation unit (20);
The condensation unit 20 is
A condensation pipe passage 21 connected to the circulation pipe 50, and
The condensation pipe passage 21 is received, and is connected to the branch pipe (60) is made of a low temperature low pressure low-pressure refrigerant (22) is reduced to the refrigerant by the second expansion valve (70) made of a ring chamber 22,
The condensation pipe passage 21
An inlet 21a and an outlet 21b connected to the circulation pipe 50;
Two branches 21c connected to each of the inlet 21a and the outlet 21b, and
Cooling device, characterized in that formed of a plurality of heat exchange pipe (21d) is formed to be bent several times in the form of "U" to connect the two branches (21c), respectively.
The method according to claim 2 or 3,
The main body 90 having an inner receiving space 91 is provided,
The compression unit (10), the condensation unit (20), the first expansion valve (30), the evaporation unit (40) is a cooling device, characterized in that arranged in the receiving space portion (91) of the main body (90).

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