KR200143512Y1 - Pipe connector of airconditioner - Google Patents

Abstract

The present invention relates to an air conditioner for lowering the temperature of a room by circulation of a refrigerant, including an accumulator 28 for separating a liquid refrigerant from a gas refrigerant, a compressor 20, an indoor heat exchanger 26 for exchanging heat with indoor air, and An air conditioner composed of an outdoor heat exchanger (22) and an expansion valve (24) for converting a low-temperature, high-pressure liquid refrigerant into a low-temperature, low-pressure gas refrigerant, between the indoor heat exchanger (26) and the accumulator (28). By inserting the high temperature and high pressure refrigerant pipe 30 piped between the compressor 20 and the outdoor heat exchanger 22 to the inside and the outside of the low temperature low pressure refrigerant pipe 36, which is a predetermined length (L), Even if the outdoor temperature rises, the coolant temperature on the low temperature side is increased and the coolant temperature on the high temperature side is not only able to operate the air conditioner normally but also increase the cooling efficiency.

Description

Piping System of Air Conditioner

1 is a perspective view schematically showing a conventional air conditioner.

2 is a circulation diagram showing a refrigerant circulation cycle of a conventional air conditioner.

3 is a circulation diagram showing a refrigerant circulation cycle of the air conditioner of the present invention.

4 is a cross-sectional view of the piping means taken along the line A-A of FIG.

5 is another cross-sectional view of the piping means along line A-A of FIG.

Figure 6 is a perspective view showing another piping means of the present invention.

7 is a perspective view showing another piping means of the present invention.

8 is a perspective view showing another piping means of the present invention.

* Explanation of symbols for main parts of the drawings

20: compressor 22: outdoor heat exchanger

24: expansion valve 26: indoor heat exchanger

28: accumulator 40: piping means

The present invention relates to an air conditioner that regulates the temperature of a room by heat-exchanging air to cool the air according to the circulation of the refrigerant, and in particular, the temperature of the coolant on the low temperature side flowing into the accumulator is increased by the refrigerant temperature on the high temperature side from the compressor. Relates to a plumbing device for an air conditioner that can increase cooling efficiency by lowering.

In general, a conventional air conditioner includes a cover member 10 forming an exterior, a main body 12 embedded in the cover member 10, and suction to suck indoor air from the front surface of the cover member 10. A grill 14, a blowing fan 18 for sucking indoor air introduced through the suction grill 14 into the main body 12, a blowing motor 16 for driving the blowing fan 18, and a low temperature. A compressor 20 for compressing a low pressure refrigerant into a high temperature high pressure refrigerant, an outdoor heat exchanger 22 for liquefying a high temperature high pressure refrigerant from the compressor 20 to a low temperature high pressure liquid refrigerant, and the low temperature high pressure liquid An expansion valve 24 for converting a refrigerant into a low temperature low pressure gas refrigerant, and a low temperature low pressure gas refrigerant depressurized by the expansion valve 24 takes heat from the indoor air sucked by the blower fan 18 to cool it. The indoor heat exchanger 26 and the cold air from the indoor heat exchanger 26 It consists of a discharge port 30 which discharges indoor air indoors.

The compressor 20 increases the temperature of the refrigerant introduced, and irreversible due to heat transfer to the surroundings during the compression process (when a process that once occurred returns to the reverse process, a process that causes a change in the surroundings or the system) exist. In this process, entropy (heat transfer divided by temperature) increases and decreases. Irreversibility and heat transfer to the refrigerant increase entropy and heat transfer from the refrigerant decreases entropy.

The outdoor exchanger 22 reduces the temperature of the refrigerant, and the temperature of the refrigerant exiting the outdoor heat exchanger 22 is lower than the saturation temperature (temperature at which evaporation occurs at a given pressure) and expands with the outdoor heat exchanger 22. The temperature drops slightly further in the piping between the valves 24. However, the above temperature decrease reduces the enthalpy of the refrigerant entering the outdoor heat exchanger 22 (multiplied by the pressure and the volume, the internal energy is added), rather than the heat exchange delivered to the refrigerant of the outdoor heat exchanger 22. Because the amount can be made larger.

In addition, in the indoor heat exchanger 26, a slight pressure drop and a temperature rise occur as the refrigerant passes through the indoor heat exchanger 26, and the refrigerant passing through the indoor heat exchanger 26 is an indoor heat exchanger 26. The temperature rises slightly due to friction with the pipe between the compressor and the compressor 20. This increases the specific volume of the refrigerant entering the compressor 20 (volume divided by mass), resulting in heat loss and efficiency. Decrease.

The discharge port 30 is provided with a wind direction up and down control plate 32 and a wind direction left and right control plate 34 for controlling the direction of the cold air supplied to the room.

The operation operation means 36 disposed on the front surface of the cover member 10 may select an operation function of the air conditioner, a reserved operation, an operation / stop, a set temperature, a time setting, a wind volume, and a wind direction.

The blower motor 16 generating power to suck the indoor air introduced through the suction grill 14 into the main body 12 drives the blower fan 18 to heat the cold air heat-exchanged in the indoor heat exchanger 26. Blow into the air.

As shown in FIG. 2, the accumulator 28 disposed directly near the compressor 20 to separate the liquid refrigerant and the gas refrigerant suddenly changes the liquid refrigerant contained in the indoor heat exchanger 26 when the load suddenly changes. It prevents the inflow to the compressor 20 to prevent the occurrence of a failure. Therefore, due to the pressure difference between the low temperature low pressure refrigerant of the indoor heat exchanger 26 and the high temperature high pressure refrigerant in the compressor 20, the refrigerant of the gas flowing into the accumulator 28 flows into the compressor 20 and the refrigerant of the liquid is accumulator ( 28) the refrigerant gathered at the lower side and supplied to the compressor 20 is introduced only in the gas state.

In the conventional air conditioner configured as described above, the refrigerant compressed in a gaseous state of high temperature and high pressure by the compressor 20 is discharged to the outdoor heat exchanger 22, and the outdoor heat exchanger 22 is converted into a compressed refrigerant of low temperature and high pressure. And liquefy by heat exchange with the air blown by the blowing fan 19.

The low temperature and high pressure refrigerant liquefied in the outdoor heat exchanger (22) passes through the expansion valve (24) and is decompressed to the low temperature low pressure refrigerant and flows into the indoor heat exchanger (26), and passes through the indoor heat exchanger (26). The low temperature low pressure refrigerant flows to the accumulator 28.

Among the refrigerants introduced into the accumulator 28, the refrigerant of the gas is introduced into the compressor 20, and the refrigerant of the liquid is collected under the accumulator 28, so that the refrigerant supplied to the compressor 20 is introduced only in the gas state.

The low temperature low pressure refrigerant introduced into the indoor heat exchanger (26) is exchanged with the air blown by the blower fan (18) to evaporate and introduced into the accumulator (28), and the cold exchanged air is discharged to the room to cool. .

On the other hand, during the winter, the refrigerant compressed to high temperature in the compressor 20 condenses in the indoor side heat exchanger 26 as opposed to the above-mentioned cooling time, thereby dissipating heat to heat the surrounding air with warm air, and again, the indoor side heat exchanger. The condensed refrigerant sent from 26 is repeatedly evaporated in the outdoor side heat exchanger 22 and then sent to the compressor 20. At this time, the air heat-exchanged with warm air while passing through the indoor side heat exchanger 26 is discharged into the room through the discharge port 30 to perform heating.

In a real refrigeration cycle, the pressure increase associated with the refrigerant flow and heat transfer to the surroundings make a difference from the refrigeration cycle of an ideal air conditioner.

However, the compressor 20 compresses the refrigerant in which the gas refrigerant and the liquid refrigerant are mixed while compressing the refrigerant containing the small amount of the liquid refrigerant in the gas refrigerant because it is difficult to maintain the equilibrium between the gas refrigerant and the liquid refrigerant. It is preferable to compress only the gas refrigerant more.

Therefore, in the air conditioner as described above, when the outside temperature is high, the temperature of the outdoor heat exchanger 22 increases, and as a result, the outdoor heat exchanger 22 needs to heat exchange with the indoor air by the increased temperature. In the end, there was a problem that not only lowers the efficiency of the air conditioner but also causes a problem in normal operation.

The present invention has been made to solve the above-described problems, the object of the present invention is that the air conditioner can not only operate the air conditioner normally, but also increase the cooling efficiency regardless of the increase in the outside temperature even if the outside temperature increases. To provide a plumbing device of the machine.

In order to achieve the above object, the piping system of the air conditioner according to the present invention includes an accumulator separating a liquid refrigerant and a gas refrigerant, a compressor, an indoor heat exchanger and an outdoor heat exchanger which exchange heat with the surroundings, and a liquid refrigerant at low temperature and high pressure. In the air conditioner composed of an expansion valve for converting the refrigerant into a low temperature low pressure refrigerant, a high temperature refrigerant pipe from the compressor passes through the inside of the low temperature refrigerant pipe entering the accumulator to increase the temperature of the low temperature refrigerant and lower the temperature of the high temperature refrigerant. Characterized in that configured.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components as those in the related art are denoted by the same name and the same reference numerals, and detailed description thereof will be omitted.

3 is a circulation diagram showing a refrigerant circulation cycle of the air conditioner of the present invention, FIG. 4 is a sectional view of the piping means according to the line AA of FIG. 3, and FIG. 5 is another sectional view of the piping means according to the AA line of FIG. 6 is a perspective view showing another piping means of the present invention, Figure 7 is a perspective view showing another piping means of the present invention, Figure 8 is a perspective view showing another piping means of the present invention.

The air conditioner according to the present invention receives a low-temperature and high-pressure refrigerant through the compressor 20 for compressing the low-temperature low-pressure refrigerant into a high-temperature high-pressure refrigerant, and the high-temperature high-pressure refrigerant from the compressor 20 through the high-temperature high-pressure refrigerant pipe 30 An outdoor heat exchanger (22) for liquefying liquid refrigerant, and an expansion valve (24) for receiving a low-temperature and high-pressure liquid refrigerant discharged from the outdoor heat exchanger (22) through a pipe (32) and converting it into a low-temperature low-pressure gas refrigerant. And an indoor heat exchanger (26) which receives the reduced-pressure low-temperature low-pressure gas refrigerant discharged from the expansion valve (24) through a pipe (34) and takes heat from the indoor air sucked by the blower fan (18) to cool it. And an accumulator for receiving the low temperature low pressure refrigerant discharged from the indoor heat exchanger 26 through the low temperature low pressure refrigerant pipe 36 to separate the gas refrigerant and the liquid refrigerant, and to discharge the gas refrigerant to the compressor 20. Consisting of 28) All.

The low temperature low pressure refrigerant pipe 36 for introducing low temperature low pressure refrigerant discharged from the indoor heat exchanger 26 into the accumulator 28 is shown in FIG. 3 and FIG. 4 in detail. The piping means 40 is provided to contact the low temperature low pressure refrigerant discharged from the indoor heat exchanger 26 and the high temperature high pressure refrigerant discharged from the compressor to reduce the pressure and temperature of the outdoor heat exchanger 22 side.

As shown in FIG. 4, the piping means 40 exchanges heat with the compressor 20 in the low temperature and low pressure refrigerant pipe 36 disposed between the indoor heat exchanger 26 and the accumulator 28. The high temperature and high pressure refrigerant pipe 30 piped between the groups 22 is inserted through a predetermined length (L).

As shown in FIG. 5, another piping means 40a applied to the present invention includes the indoor heat exchanger in the high temperature and high pressure refrigerant pipe 30a piped between the compressor 20 and the outdoor heat exchanger 22. The low-temperature low-pressure refrigerant pipe 36a disposed between the accumulator 26 and the accumulator 28 is inserted through a predetermined length L.

As shown in FIG. 6, another piping means 40b applied to the present invention is formed on the outer circumferential surface of the high temperature and high pressure refrigerant pipe 30b piped between the compressor 20 and the outdoor heat exchanger 22. The low temperature low pressure refrigerant pipe 36b disposed between the indoor heat exchanger 26 and the accumulator 28 is wound in a spiral shape.

As shown in FIG. 7, another piping means 40c applied to the present invention is an outer circumferential surface of the refrigerant pipe 36c for low temperature and low pressure disposed between the indoor heat exchanger 26 and the accumulator 28. The high temperature and high pressure refrigerant pipe 30c piped between the compressor 20 and the outdoor heat exchanger 22 is wound in a spiral shape.

As shown in FIG. 8, another piping means 40d applied to the present invention includes a refrigerant pipe 36d for low temperature and low pressure disposed between the indoor heat exchanger 26 and the accumulator 28 and The high temperature and high pressure refrigerant pipes 30d piped between the compressor 20 and the outdoor heat exchanger 22 are in contact with each other on the outer circumferential surface.

The operation and effect of the piping device of the air conditioner according to an embodiment of the present invention configured as described above will be described next.

First, when the air conditioner is driven, the low temperature low pressure refrigerant is compressed into a gas state of high temperature and high pressure by the compressor 20, and the refrigerant compressed at high temperature and high pressure is heated through the high temperature and high pressure refrigerant pipe 30 through the outdoor heat exchanger 22. ), The outdoor heat exchanger 22 liquefies the compressed gas refrigerant of high temperature and high pressure with the intake air to liquefy and discharges the low temperature low pressure liquid refrigerant to the expansion valve 24 through the pipe 32.

The low temperature and high pressure liquid refrigerant liquefied in the outdoor heat exchanger (22) passes through the expansion valve (24) and is decompressed to the low temperature and low pressure refrigerant and flows into the indoor heat exchanger (26) through the pipe (34). The refrigerant of low temperature and low pressure introduced into the gas 26 is evaporated while heat-exchanging the air around the indoor heat exchanger 26, and the air cooled by the indoor heat exchanger 26 is indoors by the blower fan 18. Discharged to cool the room.

The low temperature low pressure gas refrigerant and the liquid refrigerant passing through the indoor heat exchanger 26 are introduced into the accumulator 28 to separate the gas refrigerant and the small amount of the liquid refrigerant.

As shown in FIG. 4, the liquid refrigerant separated from the gas refrigerant is collected at the lower side of the accumulator 28. At this time, if the compressor is not operated, a pressure difference is generated between the indoor heat exchanger 26 and the compressor 20. The liquid refrigerant collected at the lower side of the accumulator 28 flows back to the indoor heat exchanger 26 through the low temperature and low pressure refrigerant pipe 36.

In addition, the gas refrigerant flows into the compressor 20 and the high temperature and high pressure refrigerant compressed by the compressor 20 has a predetermined length (L) within the high temperature and high pressure refrigerant pipe 30 in the low temperature and low pressure refrigerant pipe 36. It is piped so as to penetrate, and exchanges heat with the low temperature low pressure refrigerant flowing in the low temperature low pressure refrigerant pipe 36 flows into the outdoor heat exchanger 22 to circulate the refrigerating cycle as described above.

That is, in the refrigerating cycle of the air conditioner, the refrigerant is a compressor 20 → an outdoor heat exchanger 22 → an expansion valve 24 → an indoor heat exchanger 26 → a low temperature refrigerant pipe 36 → an accumulator 28 → a compressor. The cooling is performed while circulating in the order of (20)-> high temperature refrigerant pipe 30-> outdoor heat exchanger 22.

As shown in FIG. 5, another piping means 40a applied to the present invention includes the indoor heat exchanger in the high temperature and high pressure refrigerant pipe 30a piped between the compressor 20 and the outdoor heat exchanger 22. The low temperature and low pressure refrigerant pipe 36a disposed between the accumulator 28 and the accumulator 28 is inserted through a predetermined length L so that the high temperature and high pressure refrigerant discharged from the compressor 20 and the indoor heat exchanger 26 are formed. Heat exchange with the low temperature low pressure refrigerant flowing into the accumulator (28). Therefore, the temperature of the coolant supplied to the outdoor heat exchanger 22 is reduced, and at the same time, the coolant of the low temperature and low pressure discharged from the indoor heat exchanger 26 is increased and supplied to the accumulator 28 so that air conditioning is performed even if the outdoor temperature rises. It can operate normally without adding pressure to the machine and increase cooling efficiency.

As shown in FIG. 6, another piping means 40b applied to the present invention is provided on the outer circumferential surface of the high temperature and high pressure refrigerant pipe 30b piped between the compressor 20 and the outdoor heat exchanger 22. Since the low temperature and low pressure refrigerant pipe 36b disposed between the heat exchanger 26 and the accumulator 28 is wound in a spiral shape, the high temperature and high pressure refrigerant discharged from the compressor 20 and the indoor heat exchanger 26 are provided. It is possible to heat exchange with the low temperature low pressure refrigerant flowing into the accumulator 28 from the. Therefore, the temperature of the coolant supplied to the outdoor heat exchanger 22 is reduced, and at the same time, the coolant of the low temperature and low pressure discharged from the indoor heat exchanger 26 is increased and supplied to the accumulator 28 so that air conditioning is performed even if the outdoor temperature rises. It can operate normally without adding pressure to the machine and increase cooling efficiency.

As shown in FIG. 7, another piping means 40c applied to the present invention includes an outer circumferential surface of the low temperature low pressure refrigerant pipe 36c disposed between the indoor heat exchanger 26 and the accumulator 28. Since the high temperature and high pressure refrigerant pipe 30c piped between the compressor 20 and the outdoor heat exchanger 22 is spirally wound, the high temperature and high pressure refrigerant discharged from the compressor 20 and the indoor heat exchanger 26 are wound. It is possible to heat exchange with the low temperature low pressure refrigerant flowing into the accumulator 28 from the. Therefore, the temperature of the coolant supplied to the outdoor heat exchanger 22 is lowered and the coolant of the low temperature and low pressure discharged from the indoor heat exchanger 26 is increased to supply the accumulator 28 so that air conditioning is performed even if the outdoor temperature rises. It can operate normally without adding pressure to the machine and increase cooling efficiency.

As shown in FIG. 8, another piping means 40d applied to the present invention is a low-temperature and low-pressure refrigerant pipe 36d and the compressor disposed between the indoor heat exchanger 26 and the accumulator 28 and the compressor. Since the high temperature and high pressure refrigerant pipes 30d piped between the 20 and the outdoor heat exchanger 22 are in contact with each other on the outer circumferential surface, the high temperature and high pressure refrigerant discharged from the compressor 20 and the indoor heat exchanger 26 Heat exchange with the low temperature low pressure refrigerant flowing into the accumulator (28). Therefore, the temperature of the coolant supplied to the outdoor heat exchanger 22 is reduced, and at the same time, the coolant of the low temperature and low pressure discharged from the indoor heat exchanger 26 is increased and supplied to the accumulator 28 so that air conditioning is performed even if the outdoor temperature rises. It can operate normally without adding pressure to the machine and increase cooling efficiency.

As described above, the piping device of the air conditioner according to the present invention inserts the high temperature and high pressure refrigerant pipe guiding the high temperature and high pressure refrigerant from the compressor into the outdoor heat exchanger in the low temperature low pressure refrigerant pipe flowing into the accumulator. By lowering the temperature of the refrigerant on the low temperature side and lowering the temperature of the refrigerant on the high temperature side, it is possible to operate normally without adding pressure to the air conditioner even if the outdoor temperature rises, and increase the cooling efficiency. to be.

Claims (6)

The accumulator 28 separating the liquid refrigerant from the gas refrigerant, the compressor 20, the indoor heat exchanger 26 and the outdoor heat exchanger 22 which exchange heat with the indoor air, and the low temperature and high pressure refrigerant are used as the low temperature and low pressure refrigerant. The expansion expansion valve 24, the low temperature low pressure refrigerant pipe 36 for connecting the low temperature low pressure refrigerant flowing out from the indoor heat exchanger 26 to the accumulator 28, and the compressor 20 In the air conditioner composed of a high-temperature high-pressure refrigerant pipe 30 for connecting the high-temperature high-pressure refrigerant flowing out from them to the outdoor heat exchanger 22, the low-temperature low-pressure refrigerant pipe 36 and the high temperature and high pressure The refrigerant pipe 30 increases the temperature of the refrigerant flowing into the accumulator 28 due to the difference in the temperature of the refrigerant flowing along them, and at the same time lowers the temperature of the refrigerant flowing out of the compressor 20. Piping system of the air conditioner to the inner side, characterized in that a presented via a predetermined length (L). According to claim 1, wherein the low-temperature low-pressure refrigerant pipe (36) inside the piping device of the air conditioner, characterized in that the high-temperature high-pressure refrigerant pipe (30) is inserted so as to be accommodated by a predetermined length (L). The piping apparatus of claim 1, wherein the low temperature low pressure refrigerant pipe (36) is inserted through the inside of the high temperature high pressure refrigerant pipe (30) so as to be accommodated by a predetermined length (L). The piping system of claim 1, wherein the high temperature and high pressure refrigerant pipe (30) is spirally wound by a predetermined length (L) on the outer circumferential surface of the low temperature and low pressure refrigerant pipe (36). The piping device of claim 1, wherein the low temperature low pressure refrigerant pipe (36) is spirally wound by a predetermined length (L) on the outer circumferential surface of the high temperature high pressure refrigerant pipe (30). The air conditioner piping device according to claim 1, wherein the low temperature low pressure refrigerant pipe (36) and the high temperature high pressure refrigerant pipe (30) are installed such that their outer circumferential surfaces are in contact with each other by a predetermined length (L).