KR100504882B1 - Heat pump with vortex tube - Google Patents

Abstract

The present invention relates to a combined air-conditioning and air conditioner having a vortex tube, and includes a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger, and an air-conditioning combined use apparatus having an expansion device disposed downstream of the indoor heat exchanger during heating. An air conditioner, comprising: a vortex tube connected to an inlet part downstream of the expansion device during heating, a low temperature discharge part connected to an outlet side of the outdoor heat exchanger, and a high temperature discharge part connected to an inlet side of the outdoor heat exchanger; A bypass passage connected to an upstream side of an inflow side of the vortex tube while the heating side is connected to an inflow side of the outdoor heat exchanger; When the inlet side is connected to the outlet side of the expansion device during heating, the first outlet side is connected to the inlet side of the vortex tube, the second outlet side is connected to the bypass flow path, when the outside air temperature when heating is below the first temperature, the A three-way valve configured to switch a flow path of the refrigerant flowing through the expansion device to the vortex tube and to flow along the bypass flow path when the first temperature is exceeded; It is characterized in that it comprises a first check valve and a second check valve disposed on each downstream side of the high temperature discharge portion and the low temperature discharge portion during heating to prevent the reverse flow of the refrigerant. As a result, the vortex tube which can raise the temperature of the low-temperature refrigerant decompressed during heating, enables heating operation even at a relatively low outside temperature, and extends the defrosting cycle, thereby suppressing the heating interruption caused by the defrosting operation. Provided is a combined air conditioning and air conditioner.

Description

HEAT PUMP WITH VORTEX TUBE}

The present invention relates to a combined air-conditioning and air conditioner having a vortex tube, and more particularly, to increase the temperature of a low-temperature refrigerant depressurized during heating, which enables heating operation even at a relatively low outside air temperature, and provides a defrost cycle. The present invention relates to a combined air-conditioning and air conditioner having a vortex tube that can extend and suppress heating interruption caused by defrosting operation.

1 is a view showing an example of a refrigeration cycle configuration of a conventional air-conditioning combined air conditioner. As shown, the combined air-conditioning and air conditioner includes a compressor 11 for compressing a refrigerant, an indoor heat exchanger 15 and an outdoor heat exchanger 17, and an indoor heat exchanger 15 and an outdoor heat exchanger 17. It is provided with the expansion device 19 arrange | positioned at. These are connected to each other by the refrigerant pipe so that the refrigerant can circulate.

The four-way valve 13 is provided on the discharge side of the compressor 11 to switch the flow path so that the indoor heat exchanger 15 can perform cooling or heating. The inflow side of the four-way valve 13 is connected to the discharge side of the compressor 11, and the discharge side is connected to the suction side of the outdoor heat exchanger 17, the indoor heat exchanger 15, and the compressor 11, respectively.

By such a configuration, the four-way valve 13 switches the flow path so that the compressed refrigerant can flow to the outdoor heat exchanger 17 during cooling, and the refrigerant condensed through heat dissipation in the outdoor heat exchanger 17 expands ( 19 is expanded under reduced pressure and introduced to the indoor heat exchanger 15 to perform a cooling operation to absorb the latent heat of evaporation.

When heating, the four-way valve 13 switches the flow path so that the compressed refrigerant can flow to the indoor heat exchanger 15, and the refrigerant that performs heating by heat radiation in the indoor heat exchanger 15 is an expansion device 19. After expanding under reduced pressure, the latent heat is absorbed by the outdoor heat exchanger (17) and then flows into the suction side of the compressor (11).

On the other hand, when the outdoor temperature is about 5 ° C. or less and the heating operation is performed under relatively high temperature and low humidity, moisture in the air condenses on the surface of the outdoor heat exchanger 17, leading to deterioration of performance. do.

In this case, the defrosting operation is performed to switch the flow path so that the high temperature refrigerant compressed by the compressor 11 flows to the outdoor heat exchanger 17 as in the case of cooling, thereby removing the frost of the outdoor heat exchanger 17. have.

However, in the conventional air-conditioning combined air conditioner, since the heating function of the room is inevitably interrupted during the defrosting operation, it is not only inconvenient to use, but also the refrigerant is kept indoors while the blower fan of the indoor unit (not shown) is stopped. Since passing through the heat exchanger 15 there is a problem that the noise is relatively louder to cause a user dissatisfaction.

2 is a view showing another example of the configuration of a refrigeration cycle of a conventional air-conditioning combined air conditioner. The same and equivalent parts as those described above will be described with the same reference numerals for convenience of description. As shown, the combined air-conditioning and air conditioner includes a compressor (11) for compressing a refrigerant, an outdoor heat exchanger (17) and an indoor heat exchanger (15), and a first expansion device (19) composed of an electromagnetic expansion valve or the like. Equipped with.

The four-way valve 13 is provided at the discharge side of the compressor 11, and the outdoor heat exchanger 17 and the indoor heat exchanger 15 are connected to the suction side of the compressor 11 at the discharge side of the four-way valve 13, respectively. It is.

Meanwhile, a bypass flow passage 21 is formed on the upstream side of the indoor heat exchanger 15 along the flow direction of the refrigerant during heating so that the refrigerant can be bypassed without entering the indoor heat exchanger 15 during the defrosting operation. 21 is provided with a second expansion device 23.

By this configuration, the four-way valve 13 during the defrosting operation to switch the flow path so that the high-temperature refrigerant gas compressed by the compressor 11 can flow to the outdoor heat exchanger 17, and in the outdoor heat exchanger 17 The refrigerant having performed the defrosting action does not flow to the indoor heat exchanger 15 in which the first expansion device 19 is blocked, but moves along the bypass flow passage 21 to pass through the second expansion device 23 to the compressor 11. Is sucked to the suction side.

However, in such a conventional air-conditioning combined air conditioner, not only the heating function is stopped during the defrosting operation time but also the defrosting operation time becomes longer, so that the ratio of the liquid refrigerant in the cycle increases, so that the amount of refrigerant sucked into the compressor 11 is increased. There is a problem that the likelihood that the liquid refrigerant is sucked into the compressor 11 and the compressor 11 is damaged is increased.

Accordingly, an object of the present invention is to increase the temperature of the low-temperature refrigerant depressurized during heating to enable the heating operation even at a relatively low outside temperature and to extend the defrosting period to suppress the heating interruption caused by the defrosting operation. It is to provide a combined air-conditioning and air conditioner having a vortex tube.

The object of the present invention is to provide a compressor for compressing a refrigerant, a four-way valve connected to the discharge side of the compressor, an indoor heat exchanger connected to the discharge side of the four-way valve, and an outdoor heat exchanger connected to the discharge side of the four-way valve. In the air-conditioning combined air conditioner having an expansion device disposed downstream of the indoor heat exchanger with respect to the flow direction of the refrigerant during heating, an inlet is connected to the downstream side of the expansion device during heating and the low temperature discharge unit is the outdoor heat exchange. A vortex tube connected to an outlet side of the air conditioner and connected to an inlet side of the outdoor heat exchanger; A bypass passage connected to an upstream side of an inflow side of the vortex tube while the heating side is connected to an inflow side of the outdoor heat exchanger; The inlet side is connected to the outlet side of the expansion device in the heating direction of the refrigerant during heating, the first outlet side is connected to the inlet side of the vortex tube and the second outlet side is connected to the bypass flow path, A three-way valve for switching the flow path so that the refrigerant passing through the expansion device flows into the vortex tube when the temperature is less than one temperature, and flows along the bypass flow path when the temperature exceeds the first temperature; It is achieved by a combined air conditioning and air conditioner with a vortex tube, characterized in that it comprises a first check valve and a second check valve disposed on each of the downstream side of the hot discharge portion and the cold discharge portion to prevent the back flow of the refrigerant. do.

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

3 is a configuration diagram of a refrigeration cycle of a combined air conditioning and air conditioner having a vortex tube according to an embodiment of the present invention, and FIG. 4 is an enlarged cross-sectional view of the vortex tube of FIG. 3. As shown in these figures, the air-conditioning combined air conditioner including the present vortex tube includes a compressor 11 for compressing a refrigerant, a four-way valve 13 connected to the discharge side of the compressor 11, and a flow path for switching; The outdoor heat exchanger 17 connected to the discharge side of the four-way valve 13, the indoor heat exchanger 15 connected to the discharge side of the four-way valve 13, and the indoor heat exchanger 15 with respect to the flow direction of the refrigerant during heating. Expansion device 19 disposed on the outlet side of the inlet, and an inlet portion 37 connected downstream of the indoor heat exchanger 15 with respect to the flow direction of the refrigerant during heating, and a high temperature on the inlet side of the outdoor heat exchanger 17. The discharge unit 38 is connected and the vortex tube 35 is installed to connect the low temperature discharge unit 39 to the outlet side of the outdoor heat exchanger 17, and an expansion device for the flow direction of the refrigerant during heating. Three-way valve 31 disposed between the downstream side of 19 and the inlet portion 37 of the vortex tube 35, and the outlet side of the three-way valve 31 And a bypass passage 33 connected to the inflow side of the outdoor heat exchanger 17, respectively.

The four-way valve 13 is connected to the discharge side of the compressor 11 so as to switch the flow path, and the indoor heat exchanger 15, the outdoor heat exchanger 17, and the compressor 11 are connected to each discharge side of the four-way valve 13. ) Are connected to the suction side.

On the downstream side of the indoor heat exchanger (15) along the flow direction of the refrigerant during heating, an expansion device (19) consisting of an electromagnetic expansion valve or the like is provided, and a three-way valve (31) is disposed downstream of the expansion device (19). have. The inlet portion 37 of the vortex tube 35 is connected to the first discharge side of the three-way valve 31, and one end of the three-way valve 31 is connected to the inlet side of the outdoor heat exchanger 17. The other end of the flow path 33 is connected. Here, the three-way valve 31 is such that when the outside air temperature during the heating operation is the first temperature, for example 5 ° C or less, the refrigerant passing through the expansion device 19 flows into the vortex tube 35, and exceeds 5 ° C. In one case, the refrigerant is configured to switch the flow path so as to flow along the bypass passage 33.

The first check valve 41 is disposed on the downstream side of the high temperature discharge unit 38 of the vortex tube 35 to prevent the refrigerant passing through the bypass passage 33 from entering the high temperature discharge unit 38. Before the point where the cold outlet portion 39 of the vortex tube 35 and the outlet side of the outdoor heat exchanger 17 are joined, the second check valve may block the refrigerant from flowing into the cold outlet portion 39 during cooling. 43).

On the other hand, as shown in Figure 4, the vortex tube 35, the body 36 is formed in a tubular shape so that the fluid can flow therein, the fluid may be introduced into one side of the body 36 Inlet portion 37 is formed along the direction tangential to the circumference. The vortex tube 35 has a low temperature discharging part 39 formed at a center of one side of the body 36 along a longitudinal direction so that a low temperature fluid can be discharged and a high temperature discharging part can be discharged at the other side thereof. It is composed of a so-called counter flow tube (38) formed, the inlet portion 37 is formed on one side of the body 36 and the hot discharge portion 38 on the opposite side end of the inlet portion 37 And a so-called single flow type tube in which the low temperature discharge portion 39 is formed in the central region of the high temperature discharge portion 38.

By this configuration, in the case of heating operation when the first temperature is exceeded, the refrigerant compressed by the compressor 11 flows into the indoor heat exchanger 15 to radiate heat and performs a heating operation, while passing through the expansion device 19 under reduced pressure expansion. do. At this time, the three-way valve 31 switches the flow path so that the refrigerant passing through the expansion device 19 can flow along the bypass passage 33 to the outdoor heat exchanger 17, and the surroundings in the outdoor heat exchanger 17 are changed. The refrigerant absorbing the latent heat of evaporation is sucked to the suction side of the compressor (11) via the four-way valve (13).

On the other hand, when the outside temperature is a relatively low first temperature, for example, 5 ° C or less, the compressed refrigerant flows into the indoor heat exchanger 15 to radiate heat and performs heating, and passes through the expansion device 19. While expanding under reduced pressure. At this time, the three-way valve 31 switches the flow path so that the refrigerant flows into the vortex tube 35, and the refrigerant introduced into the inlet portion 37 of the vortex tube 35 is vortexed inside the body 36. The movement is performed, and the flow direction is changed to maintain the free vortex and flow toward the hot discharge portion 38. Some of the refrigerant flowing to the hot discharge portion 38 is discharged to the outside through the hot discharge portion 38, and a portion of the refrigerant flows to the opposite side, that is, the cold discharge portion 39 side by forming a forced vortex therein. And discharged through the low temperature discharge unit 39.

At this time, the angular velocity of the refrigerant during forced vortex and free vortex is the same, so that the refrigerant in the internal forced vortex state is discharged with the loss of the angular momentum, and the lost angular momentum energy is heated by the refrigerant forming the external free vortex. As a result, the coolant in the center side of the body 36 is lowered in temperature, and the coolant in the inner diameter side of the body 36 is raised in temperature.

The refrigerant discharged through the hot discharge unit 38 is introduced into the outdoor heat exchanger 17 to increase the temperature of the outdoor heat exchanger 17 to prevent frost on the surface of the outdoor heat exchanger 17. Instead, as a result, the suction side temperature of the compressor 11 is increased to improve the heating capacity even when the outdoor temperature is low or cold. The refrigerant discharged to the low temperature discharge unit 39 joins the refrigerant via the outdoor heat exchanger 17 and flows into the suction side of the compressor 11 via the four-way valve 13.

As described above, according to the present invention, a compressor for compressing a refrigerant, a four-way valve connected to the discharge side of the compressor, an indoor heat exchanger connected to the discharge side of the four-way valve, and an outdoor heat exchange connected to the discharge side of the four-way valve A combined air conditioning and air conditioner having an expansion device disposed downstream of the indoor heat exchanger with respect to a flow direction of the refrigerant during heating, wherein the inlet part is connected to the downstream side of the expansion device during heating and the low temperature discharge part is connected to the outdoor unit. A vortex tube connected to an outlet side of the heat exchanger and connected to an inlet side of the outdoor heat exchanger; A bypass passage connected to an upstream side of an inflow side of the vortex tube while the heating side is connected to an inflow side of the outdoor heat exchanger; The inlet side is connected to the outlet side of the expansion device in the heating direction of the refrigerant during heating, the first outlet side is connected to the inlet side of the vortex tube and the second outlet side is connected to the bypass flow path, A three-way valve for switching the flow path so that the refrigerant passing through the expansion device flows into the vortex tube when the temperature is less than one temperature, and flows along the bypass flow path when the temperature exceeds the first temperature; It is possible to increase the temperature of the low-temperature refrigerant at reduced pressure during heating by including a first check valve and a second check valve disposed on each downstream side of the hot discharge portion and the cold discharge portion to prevent the backflow of the refrigerant during heating. It is possible to provide heating operation at a relatively low outside temperature and to extend the defrosting period, thereby providing a dual air conditioning and air conditioner having a vortex tube that can suppress the heating interruption caused by the defrosting operation.

1 is a view showing an example of a refrigeration cycle configuration of a conventional air-conditioning combined air conditioner,

2 is a view showing another example of the configuration of a refrigeration cycle of a conventional air-conditioning combined air conditioner,

3 is a configuration of a refrigeration cycle of a combined air conditioning and air conditioner having a vortex tube according to an embodiment of the present invention,

4 is an enlarged cross-sectional view of the vortex tube of FIG. 3.

Explanation of symbols on the main parts of the drawings

11: compressor 13: four-way valve

15: indoor heat exchanger 17: outdoor heat exchanger

19 expansion device 31 three-way valve

33: bypass flow 35: vortex tube

41: first check valve 43: second check valve

Claims (4)

A compressor for compressing the refrigerant, a four-way valve connected to the discharge side of the compressor, an indoor heat exchanger connected to the discharge side of the four-way valve, an outdoor heat exchanger connected to the discharge side of the four-way valve, and a flow direction of the refrigerant during heating In a combined air conditioning and air conditioner having an expansion device disposed downstream of the indoor heat exchanger, an inlet is connected to a downstream side of the expansion device during heating and a low temperature discharge part is connected to an outlet side of the outdoor heat exchanger and discharges at a high temperature. The vortex tube is connected to the inlet side of the outdoor heat exchanger; A bypass passage connected to an upstream side of an inflow side of the vortex tube while the heating side is connected to an inflow side of the outdoor heat exchanger; The inlet side is connected to the outlet side of the expansion device in the heating direction of the refrigerant during heating, the first outlet side is connected to the inlet side of the vortex tube and the second outlet side is connected to the bypass flow path, A three-way valve for switching the flow path so that the refrigerant passing through the expansion device flows into the vortex tube when the temperature is less than one temperature, and flows along the bypass flow path when the temperature exceeds the first temperature; And a first check valve and a second check valve disposed at each downstream side of the high temperature discharge unit and the low temperature discharge unit to prevent a backflow of the refrigerant during heating. delete delete delete