KR19990079625A - Dehumidifier of Air Conditioner - Google Patents

Abstract

The dehumidifier of the air conditioner is connected to one indoor heat exchanger installed in one indoor unit and an independent refrigerant pass line at the front side of the one indoor heat exchanger to supply the high temperature and high pressure refrigerant during heating operation. 1 is an outdoor unit and a second outdoor unit connected to a rear side of the one indoor heat exchanger by an independent refrigerant pass line to circulate and supply the low-temperature low-pressure refrigerant during the cooling operation, so that the refrigerant pass line necessary for heating during the dehumidification operation passes. It is possible to minimize heat transfer between the front side and the rear side through which the refrigerant pass line required for cooling passes, and to reduce the processing cost and the number of processes required when separately manufacturing an indoor heat exchanger for heating and cooling.

Description

Dehumidifier of Air Conditioner

The present invention provides a heat pump type air conditioner for cooling and heating operation by installing one indoor heat exchanger in parallel in an indoor unit and connecting one indoor heat exchanger to two outdoor units with different refrigerant path lines. More particularly, the present invention relates to a dehumidifying apparatus of an air conditioner, which improves dehumidification efficiency by maintaining room temperature at a constant temperature (eg, 23-25 ° C.) while removing moisture without generating cold air.

In general, air conditioners are classified into various types according to their function or configuration of the unit. In terms of function, air conditioners can be classified into cooling only, cooling and dehumidification only, and cooling and heating. It is divided into an integrated type that is integrated into windows and the like, and a separate type that separates and installs a cooling device on an indoor side and a heat dissipation and compression device on an outdoor side.

The separate air conditioner also includes a multi-type air conditioner that connects two or more indoor units to one outdoor unit (two compressors and two four-way valves) to air-condition a plurality of indoor spaces, respectively.

In this type of conventional air conditioner, the indoor unit 100 installed indoors and the outdoor unit 110 installed outdoors operate as one system, as shown in FIG. Heating operation and cooling operation can be performed.

The outdoor unit 110 includes a compressor 120 for compressing a refrigerant into a gas state of high temperature and high pressure, and a gas refrigerant compressed at high temperature and high pressure in the compressor 120 by heat exchanged with air blown by the outdoor fan 131 to form a low temperature. An outdoor heat exchanger (130) for cooling and condensing with a low pressure liquid refrigerant, and a capillary tube (135) for expanding under reduced pressure to a low-temperature, low-pressure free refrigerant that is easy to evaporate the low-temperature and high-pressure liquid refrigerant cooled and condensed in the outdoor heat exchanger (130). The indoor unit 100 converts the low-temperature, low-pressure free refrigerant passing through the capillary tube 135 into a refrigerant gas in a low-temperature low-pressure full gas state while being evaporated by heat exchange with air blown by the indoor fan 141. The indoor heat exchanger 140 is installed.

In the air conditioner configured as described above, since the refrigerant cycles of the cooling operation and the dehumidification operation are the same in the cooling and dehumidification operation, the refrigerant cycle is made in the solid arrow direction of FIG.

First, when the high temperature and high pressure gas refrigerant discharged from the compressor 120 of the outdoor unit 110 flows into the outdoor heat exchanger 130, the outdoor heat exchanger 130 stores the gas refrigerant compressed to high temperature and high pressure in the outdoor fan 131. Heat exchanged by the air blown by the) to force the cooling to condensate, the low-temperature high-pressure liquid refrigerant condensed in the outdoor heat exchanger 130 is introduced into the capillary tube (135).

The low temperature and high pressure liquid refrigerant introduced into the capillary tube 135 is expanded into a low temperature low pressure free refrigerant which is easy to evaporate, and flows into the indoor heat exchanger 140 installed in the indoor unit 100, and the refrigerant in the indoor heat exchanger 140. Evaporates and vaporizes, takes the heat from the air blown by the indoor fan 141 to cool the indoor air, and then discharges the cooled air (cold air) to the room to perform cooling or dehumidification operation, and the indoor heat exchanger. The low temperature and low pressure gas refrigerant cooled at 140 is converted into refrigerant gas to repeat the above-described refrigerant cycle.

At this time, if the indoor unit 100 is a cooling operation, the indoor fan 141 is driven according to the air volume set by the user to perform a cooling operation. If the indoor unit 100 is a dehumidification operation, the indoor fan 141 is lowered to the lowest air volume. Perform dehumidification operation.

However, according to the dehumidification operation method of the air conditioner configured as described above, when the dehumidification operation is performed at room temperature during the rainy season or the like due to the high or low humidity, only the air volume of the room is operated by the same refrigerant cycle as the cooling operation. At this time, since cold cold air heat-exchanged in the indoor heat exchanger 140 is discharged, the actual indoor temperature is dropped, and the temperature of the indoor heat exchanger 140 is so low that the dehumidification efficiency is remarkably lowered.

In addition, since the dehumidification operation cannot be set arbitrarily by the user, the electric heater has been separately installed to realize a dehumidifying operation without cold air (cold air).

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to connect an indoor heat exchanger during cooling operation by connecting two outdoor units performing cooling operation and heating operation with different refrigerant pass lines. The air (cold air) formed by the low temperature low pressure refrigerant passing through the rear side of the air is properly mixed and discharged with the air (hot air) formed by the high temperature high pressure refrigerant passing through the front side of the indoor heat exchanger during heating operation. It is to provide a dehumidification apparatus of the air conditioner to remove the to improve the dehumidification efficiency while maintaining the room temperature at a constant temperature.

Still another object of the present invention is that the high temperature and high pressure refrigerant flows to the front side of the indoor heat exchanger installed in the indoor unit during the dehumidification operation and the low temperature and low pressure refrigerant flows to the rear side, whereby the thermal contact by air is made intimately. It is to provide a dehumidifying apparatus of an air conditioner that can reduce the processing cost and the number of processes by integrally manufactured by one process indoor heat exchanger to minimize heat transfer through.

Dehumidifier of the air conditioner according to the present invention made to achieve the above object, in the dehumidifier of the air conditioner, in the dehumidifier of the air conditioner, one indoor heat exchanger installed in one indoor unit, The first outdoor unit is connected to the front side of the indoor heat exchanger by independent refrigerant paths to circulate and supply the high temperature and high pressure refrigerant during the heating operation, and is connected to the independent refrigerant path line on the rear side of the one indoor heat exchanger to provide low temperature during the cooling operation. And a second outdoor unit for circulating and supplying the low pressure refrigerant.

1 is a refrigerant cycle diagram of a conventional air conditioner;

2 is a refrigerant cycle diagram of an air conditioner according to the present invention;

3 is an exploded perspective view showing one indoor heat exchanger according to the present invention;

Figure 4 is a side view showing a flat fin of one indoor heat exchanger according to the present invention.

Explanation of symbols on the main parts of the drawings

10: indoor unit 20, 21: first and second outdoor unit

90: indoor heat exchanger 92: flat plate fin

92a: front side 92b: rear side

92c: slit

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings, FIGS. 2 and 3.

2 is a refrigerant cycle diagram of an air conditioner according to the present invention, in which one indoor unit 10 installed indoors and two first and second outdoor units 20 and 21 installed outdoors are provided in one system. It can be operated by air conditioner and heating and cooling as needed.

The first and second outdoor units 20 and 21 have first and second compressors 30 and 31 for compressing a refrigerant into a gaseous state of high temperature and high pressure, respectively, and the first and second outdoor units 20 and 21 according to operating conditions (cooling or heating). First and second four-way valves 40 and 41 for converting the flow of gas refrigerant compressed at high temperature and high pressure in the first and second compressors 30 and 31, respectively, and the first and second compressors during cooling operation. First and second outdoor heat exchangers 50 and 51 for cooling and condensing the gas refrigerant compressed at high temperature and high pressure to the liquid refrigerant having low temperature and high pressure, respectively, at 30 and 31, and the first and second outdoor heat exchangers. First and second outdoor fans 50a and 51a which suck outdoor air and blow air to the first and second outdoor heat exchangers 50 and 51 so that heat exchange is smoothly performed at 50 and 51. And a low-temperature low-pressure free refrigerant, which is connected to the indoor unit 10 and is easy to evaporate the low-temperature, high-pressure liquid refrigerant that has been cooled and condensed in the first and second outdoor heat exchangers 50 and 51, respectively. Low temperature and low pressure that is easily evaporated together with the first and second capillary tubes 60 and 61 for expanding under reduced pressure and the refrigerant liquefied in the indoor heat exchanger described later in the heating operation. First and second heating capillary tubes 70 and 71 for expanding under reduced pressure with a free refrigerant respectively, and first and second one-way valves for turning on the refrigerant flow in one direction so that the refrigerant passes only during the cooling operation. 80 and 81 are provided.

On the other hand, the indoor unit 10, the indoor heat exchange for converting the low-temperature low-pressure free refrigerant passing through the first and second capillary tubes 60 and 61 during cooling operation into refrigerant gas of low-temperature low-pressure completely gaseous refrigerant, respectively. 90 and an indoor fan 90a for circulating air in the indoor heat exchanger 90 to circulate air in a smooth manner.

That is, the indoor heat exchanger 90 is parallel to each other at regular intervals such that the two end plates 91 maintain the left and right constant intervals as shown in FIG. 3, and the heat is passed while the airflow passes between the end plates 91. The plurality of plate fins 92 made of aluminum or aluminum alloy and the refrigerant flowing from the first and second outdoor units 20 and 21 are thermally conductive to the plurality of plate fins 92. ) And a plurality of first and second refrigerant pipes 93 and 94 inserted in the upper and lower zigzag directions at the same time and arranged in different refrigerant path lines at the front and rear sides of the plurality of flat plate fins 92, respectively; A pair of two refrigerant pipes 93 connected to each other so as to connect the plurality of first and second refrigerant pipes 93 and 94 protruding to the outside of the two end plates 91 by a refrigerant path line, respectively. It is composed of a plurality of return band tubes (95).

At this time, as shown in Figure 4 in the center of the plurality of flat fins 92, when the different refrigerant pass lines required for heating operation and cooling operation is installed on the front side (92a) and rear side (92b) when the dehumidification operation And a plurality of second refrigerant pipes 94 provided on the rear side 92b and cooling heat generated by the high temperature and high pressure gas refrigerant passing through the plurality of first refrigerant pipes 93 provided on the front side 92a. A plurality of slits 92c are formed to minimize the heat transfer caused by the low-temperature, low-pressure free refrigerant to heat transfer through the flat plate fin 92.

Next, the operation and effect of the present invention configured as described above will be described.

When the first and second compressors 30 and 31 and the first and second outdoor fans 50a and 51a are turned on by applying power to the air conditioner, the first and second outdoor units 20 may be turned on. The high temperature and high pressure gas refrigerant from the first and second compressors 30 and 31 of the 21 is passed through the first and second four-way valves 40 and 41 to the first and second outdoor heat exchangers 50 ( 51, and the first and second outdoor heat exchangers (50) and (51) heat exchange the gas refrigerant compressed to high temperature and high pressure with air blown by the first and second outdoor fans (50a) (51a). And condensed by forced cooling, and the low-temperature and high-pressure liquid refrigerant condensed in the first and second outdoor heat exchangers 50 and 51 passes through the first and second one-way valves 80 and 81. 2 flows into the capillary tubes 60 and 61.

In addition, the low-temperature and high-pressure liquid refrigerant introduced into the first and second capillary tubes 60 and 61 is expanded to a low-temperature, low-pressure free refrigerant which is easy to evaporate, and then the front and rear ends of the indoor heat exchanger 90 installed in the indoor unit 10. The free-flowing low-temperature, low-pressure free refrigerant, which is decompressed through the first and second capillary tubes 60 and 61, respectively, flows into different refrigerant path lines to the side ends, respectively, and is illustrated in FIG. When evaporating and evaporating while passing through, the heat is removed from the air blown by the indoor fan 90a to cool the indoor air, and then a cooling operation is performed to discharge the cooled air (cold air) into the room.

At this time, the low-temperature low-pressure gas refrigerant cooled in the indoor heat exchanger (90) flows back into the first and second compressors (30) and (31) through the first and second four-way valves (40) and (41). And the first and second outdoor units 20 and 21 are converted into a refrigerant gas having a high temperature and high pressure by the compression action of the second compressors 30 and 31, and the refrigerant cycle is repeated along the solid arrow direction of FIG. 2. Perform cooling.

On the other hand, when the dehumidification operation signal is input during the cooling operation, the first outdoor unit 20 has refrigerant in the first compressor 30 → the first four-way valve 40 → the indoor heat exchanger 90 in the dotted arrow direction of FIG. 2. One side of the first capillary tube (60), the first heating capillary tube (70), the first external heat exchanger (50), the first four-way valve (40), and the first compressor (30). .

That is, when the first four-way valve 40 is turned on, the high-temperature, high-pressure gas refrigerant discharged from the first compressor 30 of the first outdoor unit 20 passes through the first four-way valve 40 to the indoor unit 10. When flowed into one side of the indoor heat exchanger 90 installed in the inside, one side of the indoor heat exchanger (90) heats the air blown by the indoor fan (90a) by the cooling water or air at room temperature to cool the room temperature high pressure refrigerant The heating operation which discharges the warmed air (hot air) to a room by cooling is performed.

In addition, the refrigerant liquefied at one side of the indoor heat exchanger (90) expands under reduced pressure to a low-temperature, low-pressure free refrigerant that is easily evaporated through the first capillary tube (60) and the first heating capillary tube (70), and thus, the first outdoor heat exchanger (50). ), The first outdoor heat exchanger (50) exchanges and cools the low-temperature low-temperature free refrigerant with air blown by the first outdoor fan (50a), and cools the first outdoor heat exchanger (50). The low-temperature low-pressure gas refrigerant flows back into the first compressor 30 through the first four-way valve 40 and is converted into a refrigerant gas of high temperature and high pressure by the compression action of the first compressor 30. The heating cycle is repeated by repeating the refrigerant cycle in the dotted arrow direction in FIG.

At this time, since the second four-way valve 41 of the second outdoor unit 21 maintains the off state during the cooling operation, the second outdoor unit 21 repeatedly cools the refrigerant cycle in the solid arrow direction of FIG. 2. Is done.

As described above, when the first outdoor unit 20 performs the heating operation and the second outdoor unit 21 performs the cooling operation during the dehumidification operation during the cooling operation, the high temperature and high pressure gas refrigerant discharged from the first compressor 30 is The low-temperature low-temperature free refrigerant introduced into one side of the indoor heat exchanger 90 installed in the indoor unit 10 along the independent refrigerant path line and depressurized through the second capillary tube 61 is the indoor unit 10 along the independent refrigerant path line. The refrigerant cycle flowing into the other side of the indoor heat exchanger 90 installed therein is repeated.

At this time, the indoor heat exchanger (90) is provided with a plurality of plate fins 92 in parallel with a predetermined interval so that the heat is transferred between the two end plates (91), these plurality of plate fins (92) Since a plurality of slits 92c are formed in the center between the front side 92a and the rear side 92b of the plurality of first refrigerant pipes 93, the gas refrigerant having a high temperature and high pressure in the first outdoor unit 20 is formed. And a plurality of second refrigerants having low temperature and low pressure free refrigerant generated in the second outdoor unit 21 and the heat generated while passing to the front side 92a of the plate fin 92 along an independent refrigerant path line formed by the return band tube 95. Cooling heat generated while passing to the rear side 92b of the plate fin 92 along the independent refrigerant path line formed by the refrigerant pipe 94 and the return band pipe 95 is caused by the gap GAP by the slit 92c. Heat transfer to each other is minimized.

That is, the front side 92a and the rear side 92b of the plate pin 92 are processed into one member by one process, but at regular intervals according to the width of the plurality of slits 92c formed in several places in the center thereof. Of course, the heat generated from the high-temperature, high-pressure gas refrigerant passing along the independent refrigerant pass line of the front side 92a by these slits 92c may not be easily transferred to the rear side 92b. Cooling heat generated from the low-temperature low-pressure free refrigerant passing along the independent refrigerant path line of the rear side 92b is not easily transferred to the front side 92a.

Therefore, the air (cold air) that passes through the heat exchange at the rear side 92b of the plate fin 92 of the indoor heat exchanger 90 according to the cooling operation of the second outdoor unit 21 passes through the heating operation of the first outdoor unit 20. When passing through the front side 92a of the plate fin 92 of the indoor heat exchanger 90, which emits heat, it forms a mixture of air (intermediate temperature air in which cold air and hot air are mixed) and discharge port of the indoor unit 10. By being discharged into the air, the moisture contained in the cold wind is removed as well as a dehumidifying operation for maintaining a constant temperature.

On the other hand, when the heating operation signal is input to the first and second outdoor units 20 and 21, the refrigerant is first and second compressors 30 and 31 → first and second in accordance with the dotted arrow direction of FIG. Four-way valve (40) (41) → indoor heat exchanger (90) → first and second capillary tubes (60) (61) → first and second heating capillaries (70) (71) → first and second outdoor heat exchange Air (50) (51) → the first and second four-way valve (40) (41) → the first and second compressors 30, 31 to form a refrigerant cycle circulated in the order.

That is, the high-temperature, high-pressure gas refrigerant discharged from the first and second compressors 30 and 31 of the first and second outdoor units 20 and 21 opens the first and second four-way valves 40 and 41. When each is introduced into the indoor heat exchanger 90 installed in the indoor unit 10 along different refrigerant paths, the indoor heat exchanger 90 sends the air blown by the indoor fan 90a to the coolant or air at room temperature. By heat-exchanging and cooling with a refrigerant of room temperature and high pressure, the air passing through the indoor heat exchanger 90 discharges warmed air (hot air) into the room to perform a heating operation.

The refrigerant liquefied in the indoor heat exchanger (90) is a low-temperature, low-pressure free refrigerant that is easily evaporated through the first and second capillary tubes (60) and (61) and the first and second heating capillaries (70) and (71). It expands under reduced pressure and flows into the first and second outdoor heat exchangers (50) and (51), and the first and second outdoor heat exchangers (50) and (51) transfer the low-temperature, low-pressure free refrigerant to the first and second outdoor fans ( The low-temperature, low-pressure gas refrigerant cooled by heat exchanged by air blown by the air blown by 50a) and 51a, and cooled by the first and second outdoor heat exchangers 50 and 51, is the first and second four-way valves 40. The first and second compressors 30 and 31 flow into the first and second compressors 30 and 31 again and are converted into refrigerant gas of high temperature and high pressure by the compression action of the first and second compressors 30 and 31. 2 The outdoor unit 20, 21 performs heating operation which repeats a refrigerant cycle in the dotted arrow direction of FIG.

As described above, according to the dehumidifying apparatus of the air conditioner according to the present invention, the indoor heat exchanger installed in one indoor unit is configured to be connected to two first and second outdoor units respectively with different refrigerant pass lines, thereby cooling and heating operation. The air (cold air) heat exchanged at the rear side of the indoor heat exchanger according to the cooling operation of the second outdoor unit is heat-exchanged at the front side of the indoor heat exchanger according to the heating operation of the first outdoor unit. ) And mixed air (intermediate temperature air mixed with cold and warm air) is discharged to remove moisture included in cold air to increase dehumidification efficiency and to maintain a constant temperature (23-25 ℃). Operation can be performed, and thus, the laundry drying function in summer, as well as winter moisture removal is possible.

In addition, the flat plate fins of the indoor heat exchanger have their front side through which the refrigerant pass line necessary for heating passes and the rear side through which the refrigerant pass line necessary for cooling passes through the process is integrated in one process. Since a plurality of slits are formed in the chamber, there is an effect of reducing the processing cost and the number of processes required when separately manufacturing an indoor heat exchanger for heating and cooling.

Claims (3)

In the dehumidifier of the air conditioner, One indoor heat exchanger installed in one indoor unit, A first outdoor unit connected to a front side of the one indoor heat exchanger by an independent refrigerant path line and circulating and supplying a high temperature and high pressure refrigerant during a heating operation; And a second outdoor unit connected to a rear side of the one indoor heat exchanger by an independent refrigerant pass line and circulating and supplying a low temperature low pressure refrigerant during a cooling operation. The method of claim 1, It is generated by the high temperature and high pressure refrigerant passing through the refrigerant pass line of the front side when the dehumidification operation is provided between the front side and the rear side of the indoor heat exchanger, respectively, different refrigerant path lines for heating operation and cooling operation are installed on the front side and the rear side. The dehumidifier of the air conditioner, characterized in that a plurality of slits are formed to minimize the heat transfer to the heat generated by the low-temperature low-temperature refrigerant passing through the refrigerant path and the coolant pass line of the rear side. The method of claim 2, The slit is a dehumidifier of the air conditioner, characterized in that penetrated at a predetermined interval in the center between the front side and the rear side with respect to the plurality of plate fins (heating fins) constituting the indoor heat exchanger.