KR100902931B1 - Air conditoner - Google Patents

Abstract

An air conditioner is provided to improve the freezing efficiency since the refrigerant passing through a refrigerant pipe is expanded after being heat-exchanged with the condensed water of a drain tool. An air-conditioner comprises a radiating unit(70). The radiating unit is formed in a condenser-expander connection refrigerant pipe(20) between an expander(6) and a condenser(4). The radiating unit cools the refrigerant with the condensed water(W) before the refrigerant passing through the condenser is flowed in the expander and is expanded to low temperature and low pressure. The radiating unit comprises a first and the second bent unit and a straight line unit which are folded to have the refrigerant passing through the radiating unit flown to opposite direction of the condensed water. The straight line unit is arranged on a drain pan path of a drain unit(50).

Description

Air Conditioner {Air conditoner}

The present invention relates to an air conditioner, and more particularly, to an air conditioner in which a refrigerant condensed in a condenser is expanded after being cooled by condensate generated and drained in an evaporator.

In general, an air conditioner is a device that cools or heats a room using a refrigeration cycle including a compressor, a condenser, an expander, and an evaporator, and is classified into an integrated type and a separate type according to whether an indoor unit and an outdoor unit are divided.

The integrated type and the separated type are functionally the same, but the integrated type includes a compressor, a condenser, an expansion device, and an evaporator in a single device, and the device is installed outdoors and a suction duct / discharge duct is connected to the device. The device is installed on a wall or window of a building.

On the other hand, the separate type is to install an evaporator, an expander and an indoor fan in an indoor unit, a condenser, a compressor, an outdoor fan, etc. in an outdoor unit, and connect a compressor, a condenser, an expander, and an evaporator with a refrigerant pipe.

1 is a schematic configuration diagram of an air conditioner according to the prior art.

The air conditioner shown in FIG. 1 includes a compressor (2) for compressing a refrigerant at a high temperature and high pressure, a condenser (4) condensed in a liquid phase while the refrigerant compressed in the compressor (2) is cooled, and condensed in the condenser (4). An expander 6 having a reduced temperature as the refrigerant is reduced in pressure, and an evaporator 8 which evaporates while the refrigerant expanded at the expander 6 (temperature 5 ° C. to 15 ° C.) exchanges heat with outside air.

In the air conditioner, the compressor 2 and the condenser 4 are installed in the outdoor unit O, and the expander 6 and the evaporator 8 are installed in the indoor unit I.

As described above, the air conditioner condenses moisture in the air on the surface of the evaporator 8 so that the condensed water flows down the surface of the evaporator 8, and the drain hose connected to the drain pan and the drain pan installed under the evaporator 8 is connected to the air conditioner. Through the air conditioner.

On the other hand, Figure 2 is the actual PH diagram of the refrigeration cycle of the air conditioner according to the prior art, the refrigerant compressed in the compressor (2) flows out of the sieve condenser (4) that is not 100% condensed while passing through the condenser (4) It expands in that state.

As described above, the air conditioner according to the related art does not sufficiently condense when the refrigerant passes through the condenser 4, and thus, a refrigeration efficiency is low.

The present invention has been made to solve the above problems of the prior art, the object of the present invention is to provide an air conditioner that can increase the refrigeration efficiency in a simple structure in which the refrigerant pipe between the condenser and the expander heat exchange with the condensate of the drain mechanism. .

Another object of the present invention is to provide an air conditioner having a high cooling efficiency of the refrigerant passing through the condenser.

Still another object of the present invention is to provide an air conditioner capable of increasing the refrigeration efficiency in a separate air conditioner separated from an indoor unit and an outdoor unit.

An air conditioner according to the present invention for solving the above problems includes a compressor, a condenser, an expander, and an evaporator connected to a refrigerant pipe, and a drain mechanism for receiving and draining condensed water generated by the evaporator. The refrigerant pipe between the condenser and the expander has a heat dissipation portion arranged to exchange heat with the condensed water of the drain mechanism to release heat of the refrigerant to the condensed water.

The drain mechanism is disposed below the evaporator and includes a drain pan having a flow path through which the condensate flows, wherein the heat dissipation portion is a bent portion in which a part of the refrigerant pipe between the condenser and the expander is bent in the flow path. to be.

The heat dissipation part is formed at a portion passing through an upper side of the drain pan among the refrigerant pipes between the condenser and the expander.

The heat radiating portion is provided with a straight portion at the bottom.

The heat dissipation unit is disposed such that condensed water flowing along the drain mechanism and the refrigerant passing through the heat dissipation unit flow in opposite directions.

The drain pan has a heat dissipation part fixing part for fixing the heat dissipation part.

The refrigerant piping between the evaporator and the compressor is arranged such that a portion passes over the drain pan.

In the air conditioner according to the present invention configured as described above, the refrigerant passing through the refrigerant pipe between the condenser and the expander is expanded after being cooled by the condensate while passing through a heat dissipation unit arranged to exchange heat with the condensate of the drain mechanism, so that the refrigeration efficiency is high. There is an advantage.

In addition, the air conditioner according to the present invention comprises a bent portion bent so that the heat dissipation portion is located in the flow path formed in the drain pan, by bending a portion of the refrigerant pipe between the condenser and the expander to place on the flow path of the drain pan refrigerant by condensate Since it can be cooled, the cost is low and the structure is simple to increase the refrigeration efficiency.

In addition, the air conditioner according to the present invention is formed in the portion of the heat dissipation portion passing through the upper side of the drain pan of the refrigerant pipe between the condenser and the expander, it is necessary to bend more than the refrigerant pipe between the condenser and the expander to form the heat dissipation portion. There is no advantage to minimize the length of the refrigerant pipe including the heat dissipation unit.

In addition, the air conditioner according to the present invention is provided with a straight portion in the lower portion of the heat dissipation portion is heat exchange with the refrigerant and condensate water sufficient heat transfer area, there is an advantage that the refrigerant can be sufficiently cooled.

In addition, in the air conditioner according to the present invention, the condensate flowing along the drain mechanism and the refrigerant passing through the heat dissipation portion flow in the opposite direction, so that the cooling efficiency of the refrigerant is high.

In addition, the air conditioner according to the present invention is provided with a heat dissipation part fixing portion for fixing the heat dissipation portion to the drain pan, it is possible to prevent the heat dissipation portion to flow by vibration, etc., and to ensure that the heat dissipation portion does not deviate from the flow path of the drain pan, the reliability There is a high advantage.

 In addition, the air conditioner according to the present invention is disposed so that a portion of the refrigerant pipe between the evaporator and the compressor passes through the upper side of the drain pan, so that the condensed water generated in the refrigerant pipe between the evaporator and the compressor is dropped together is treated by the drain pan. Simple structure, as well as condensate dropped from the evaporator to the drain pan

Since the condensed water dropped in the refrigerant pipe between the evaporator and the compressor flows, there is an advantage that the drain pan can secure sufficient condensed water.

In addition, in the air conditioner according to the present invention, as a part of the refrigerant pipe between the condenser and the expander is separated from the refrigerant pipe between the evaporator and the compressor, the refrigerant pipe between the condenser and the expander and the refrigerant pipe between the evaporator and the compressor are arranged in close proximity. There is an advantage of minimizing the heat loss generated by the heat exchange that can occur when.

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

Figure 3 is a schematic configuration diagram of an air conditioner according to the present invention, Figure 4 is a P-H diagram of the refrigeration cycle of the air conditioner according to the present invention.

As shown in FIG. 3, the air conditioner according to the present embodiment includes a compressor 2 for compressing a refrigerant, a condenser 4 for condensing the refrigerant compressed by the compressor 2, and a condenser 4. And an evaporator 8 through which the expanded refrigerant is expanded and a refrigerant expanded by the expander 6 is evaporated.

The compressor 2 and the condenser 4 are connected to the compressor-condenser connection refrigerant pipe 10 which is a refrigerant pipe between the compressor 2 and the condenser 4 through which the high temperature and high pressure refrigerant compressed by the compressor 2 passes. The condenser 4 and the expander 6 are connected to the condenser-expander connection refrigerant pipe 20, which is a refrigerant pipe between the condenser 4 and the expander 6 through which the hot refrigerant condensed in the condenser 4 passes, The expander 6 and the evaporator 8 are connected to an expander-evaporator connection refrigerant pipe 30, which is a refrigerant pipe between the expander 6 and the evaporator 8 through which the expanded refrigerant passes in the expander 6, and the evaporator ( 8) and the compressor 2 are connected to the evaporator-compressor connection refrigerant pipe 40, which is a refrigerant pipe between the evaporator 8 and the compressor 2 through which the low temperature refrigerant evaporated in the evaporator 8 passes.

The air conditioner as described above may be configured as an integrated air conditioner, may be configured as a separate air conditioner, it will be described as a separate air conditioner.

The outdoor unit O is provided with an compressor 2 and a condenser 4, and an outdoor blower including an outdoor fan and a fan motor for passing outdoor air to the outdoor unit O.

In addition, the indoor unit I is provided with an expander 6 and an evaporator 8 and an indoor blower including an indoor fan and a fan motor for passing indoor air to the indoor unit I.

Here, the inflator 6 may be made of a capillary tube, or may be an electromagnetic expansion valve whose opening degree is variable according to the input frequency.

On the other hand, the condenser-expander connection refrigerant pipe 20 is a kind of high-temperature pipe which is disposed to pass through the outdoor unit (O) and the indoor unit (I) as a whole, and the high-temperature refrigerant passes, the high temperature service valve 21 installed in the outdoor unit (O) And a high temperature outdoor unit pipe 22 connected to the condenser 4, a high temperature indoor unit pipe 24 connected to the expansion mechanism 6, and a high temperature installation pipe connecting the high temperature indoor unit pipe 24 and the high temperature service valve 21. 26).

The evaporator-compressor connection refrigerant pipe 40 is a kind of low temperature pipe through which the low temperature refrigerant passes through the outdoor unit O and the indoor unit I as a whole, and the low temperature service valve 41 installed in the outdoor unit O. Low temperature outdoor piping (42) connected to the compressor (2), low temperature indoor unit piping (44) connected to the evaporator (6), and low temperature installation piping (46) connecting the low temperature indoor unit piping (42) and the low temperature service valve (41). Is done.

That is, the indoor unit I includes an expander 6, an evaporator 8, a high temperature indoor unit pipe 24, and a low temperature indoor unit pipe 44. The outdoor unit O includes a compressor 2 and a condenser. (4), the high temperature service valve 21, the high temperature outdoor unit piping 22, the low temperature service valve 41, and the low temperature outdoor unit piping 42 are included.

Here, the high temperature installation pipe 26 penetrates the indoor unit I and a part thereof is located inside the indoor unit I, one end is connected to the high temperature indoor unit pipe 24, and the other end is connected to the high temperature service valve 21. .

The low temperature installation pipe 46 penetrates the indoor unit I and a part thereof is located inside the indoor unit I, one end of which is connected to the low temperature indoor unit pipe 44, and the other end thereof is connected to the low temperature service valve 41.

On the other hand, the indoor unit I is provided with a drain mechanism 50 which receives the condensed water W generated on the surface of the evaporator 8 and falls to the outside of the indoor unit I.

The condenser-expander connection refrigerant pipe 20, which is a refrigerant pipe between the condenser 4 and the expander 6, is disposed to exchange heat with the condensed water W of the drain mechanism 50 to heat the refrigerant with the condensed water W. The radiating heat dissipation part 70 is formed.

The heat dissipation unit 70 is an intercooler that cools the refrigerant with condensed water W before the refrigerant passing through the condenser 4 flows into the expansion mechanism 6 and expands to low temperature and low pressure. Since it is located in (I) is formed in the condenser-expander connection refrigerant pipe 20 located in the interior of the indoor unit (I).

The heat dissipation unit 70 is formed in at least one of the high temperature indoor unit pipe 24 and the high temperature installation pipe 26, and the coolant is formed in at least one of the high temperature indoor unit pipe 24 and the high temperature installation pipe 26. Further condensed while passing through), the condensed water of the drain mechanism 50 is heated by receiving the heat of the refrigerant is discharged to the outside of the indoor unit (I).

It is preferable that the heat radiating part 70 is provided in the piping which is close to the drain mechanism 50 especially the drain pan 52 mentioned later among the high temperature indoor unit piping 24 and the high temperature installation piping 26. FIG.

The hot indoor unit pipe 24 is located closer to the drain pan 52 than the hot installation pipe 26 and is assembled to the indoor unit I when the indoor unit I is transported, whereas the hot indoor unit pipe 26 is The heat dissipation part 70 is connected to the high temperature indoor unit pipe 24 in consideration of the fact that the position is located far away from the drain pan 52 relative to the high temperature indoor unit pipe 24 and the possibility of replacing the air conditioner is high. It is preferable to form, and it demonstrates as what was formed in the high temperature indoor unit piping 24 below.

The heat dissipation unit 70 may be formed such that a part of the high temperature indoor unit pipe 24 itself, that is, a part of the high temperature indoor unit pipe 24 is in direct contact with the condensate water W, and is disposed between the high temperature indoor unit pipe 24 and the condensate water W. Is located in the one side is in contact with the high temperature indoor unit pipe 24 and the other side is made of a separate heat transfer member in contact with the condensate (W) It is also possible to transfer the heat of the refrigerant to the condensate (W) through the heat transfer member, When a part of the 24 is formed to be in direct contact with the condensate (W), since the number of parts is small and the heat dissipation of the refrigerant is efficient, a part of the high-temperature indoor unit pipe 24 will be described as being in direct contact with the condensate (W).

5 is a partial perspective view of an air conditioner according to the present invention, FIG. 6 is a longitudinal cross-sectional view of the drain pan shown in FIG. 5, and FIG. 7 is a cross-sectional view of the drain pan shown in FIG. 5.

As shown in FIGS. 5 to 7, the drain mechanism 50 is installed in the indoor unit I to be located below the evaporator 8 and includes a drain pan 52.

The drain pan 52 has a flow path 54 through which condensate flows, and a condensate discharge part 56 for discharging condensate W flowing along the flow path 54 is formed at one side.

The drain pan 52 is formed in a box shape having an open top surface as a whole, and the condensate discharge part 56 is formed at one side of the left and right sides of the drain pan 52, and the flow path 54 is the condensate discharge part. It is formed to be sloped downward toward the condensate outlet 56 to flow toward 56.

That is, when the condensate discharge unit 56 is formed on the left side of the drain pan 52, the drain pan 52 is formed such that condensate flows from the right side to the left side, and the condensate discharge unit 56 is formed on the drain pan 52. When formed on the right side, condensate flows from left to right.

The drain pan 52 is formed with the lower plate portion 57 and the lower plate portion 57 vertically or inclined to form the flow path of the condensed water (W) together with the lower plate portion 57. ) 59, 60, and 61, and the condensate outlet 56 is formed to protrude downward from the lower plate 57.

The drain mechanism 50 is connected to the condensate discharge part and disposed to penetrate the indoor unit I, and further includes a drain hose 62 for guiding the condensate discharged to the condensate discharge part 56 to the outside of the indoor unit I. .

Meanwhile, each of the high temperature indoor unit pipe 24 of the condenser-expander connection refrigerant pipe 20 and the low temperature indoor unit pipe 44 of the evaporator-compressor connection refrigerant pipe 40 is used for internal space utilization or parts arrangement of the indoor unit I. As shown in FIG. 5, a part thereof is disposed to pass over an upper side of the drain pan 52, and one side of each is inserted into and fixed to the refrigerant pipe fixing unit 64 recessed in the drain pan 52.

   The heat dissipation unit 70 includes a bent portion in which a part of the high temperature indoor unit pipe 24 of the condenser-expander connection refrigerant pipe 20 is bent to be positioned in the flow path 54, and a part of the high temperature indoor unit pipe 24 is a drain pan. The refrigeration efficiency is increased by the simple structure which bends so that it may be located in the flow path 54 which is inner side of 52. As shown in FIG.

The heat dissipation unit 70 is formed at a portion passing the upper side of the drain pan 52 of the high temperature indoor unit pipe 24 of the condenser-expander connection refrigerant pipe 20.

The heat dissipation unit 70 is provided with a straight portion 72 at the lower portion such that the refrigerant and the condensate (W) heat exchange with a sufficient time and heat transfer area.

The heat dissipation unit 70 is bent in a '∪' shape on a portion of the high temperature indoor unit pipe 24 passing through the upper side of the drain pan 52.

That is, the heat dissipation part 70 includes a first bent part 74 bent downward from a portion passing through the upper side of the drain pan 52 among the high temperature indoor unit pipe 24 of the condenser-expander connection refrigerant pipe 20, and the first bent part 74. The straight portion 72 bent horizontally at the lower end of the bent portion 74 and the second bent portion 76 bent upward at the straight portion 72.

The heat dissipation part 70 has a flow path of the drain pan 52 such that the straight part 72 is lower than the upper end of the drain pan 52 before, after, left and right of the drain pans 52, 59, 60, 61. Disposed at 54.

The heat dissipation part 70 is a substantially heat exchange part or a cooling part in which the lower part of the first bent part 74 and the lower part of the second bent part 76 and the straight part 72 are in contact with the condensate (W). It is also possible that a single number 72 may be provided, and a plurality of straight portions 72 may be provided in a zigzag shape or may be provided in a plurality of grid shapes.

The heat dissipation unit 70 is disposed such that the condensed water W flowing along the flow path 54 of the drain mechanism 50, particularly the drain pan 52, and the refrigerant passing through the heat dissipation unit 70 flow in opposite directions.

That is, when the condensed water W that flows down into the flow path 54 of the drain pan 52 flows from the left side to the right side of the drain pan 52, the heat dissipation part 70 has a coolant in the straight portion 72. When the condensate (W) is configured to flow from the right side to the left side of the drain pan 52, the heat dissipation unit 70 is a refrigerant from the left side to the right side of the straight portion 72 It is configured to flow.

 The drain pan 52 has a heat dissipation part fixing part 66 fixing the heat dissipation part 70.

The heat dissipation part fixing part 66 is to allow the heat dissipation part 70 to come into contact with the condensed water W while the position of the heat dissipation part 70 is fixed, and is formed to protrude upward from the lower plate part 57 of the drain pan 52. (70) In particular, it consists of a pair of hooks (67, 68) for elastically fixing one side of the straight portion (72).

 The heat dissipation part fixing part 66 allows the heat dissipation part 70 to enter while being elastically bent when the heat dissipation part 70 is installed, and the heat dissipation part 70 is attached to the lower plate 57 of the drain pan 52. When in contact or close to the original form is restored to limit the front, rear, upper movement of the heat dissipation unit (70).

Hereinafter, the operation of the present invention configured as described above is as follows.

First, in the cooling operation of the air conditioner, the outdoor unit O is driven by the compressor 2 and the outdoor blower, and the indoor unit I is driven by the indoor blower.

When the compressor 2 is driven, the compressor 2 compresses the low-temperature, low-pressure gaseous refrigerant into the high-temperature, high-pressure gaseous refrigerant, and the refrigerant compressed in the compressor 2 passes through the compressor-condenser connecting pipe 10 to condenser ( 4), and after passing through the condenser 4, it condenses while releasing heat to outdoor air sucked into the outdoor unit.

The refrigerant condensed as described above is moved to the indoor unit (I) through the condenser-expander connection pipe (20), and passes through the heat radiating unit (70) inside the indoor unit (I), and then moves to the expander (6), Inflator 6 is expanded to low temperature and low pressure.

The expanded refrigerant is introduced into the evaporator 8 through the expander-evaporator connecting pipe 30 and then evaporated while depriving the heat of the indoor air sucked into the indoor unit I while passing through the evaporator 8. After that, the evaporator-compressor connecting pipe 40 passes through the outdoor unit O, and flows from the outdoor unit O into the compressor 2.

During operation of the air conditioner as described above, water in the indoor air is condensed on the surface of the evaporator 8 and the portion of the evaporator-compressor connecting pipe 40 that passes through the upper side of the drain pan 52. The condensate generated on the surface falls to the drain pan 52 along the surface of the evaporator 8, and the condensate generated in the portion passing through the upper side of the drain pan 52 in the evaporator-compressor pipe 40 is drain pan 52. Fall).

As described above, the condensed water dropped to the drain pan 52 contacts the heat dissipation unit 70 while flowing along the flow path 54 of the drain pan 52.

At this time, the condensed water flowing along the drain pan 52 and in contact with the heat dissipation unit 70 is lower than a high temperature refrigerant passing through the heat dissipation unit 70, and the heat of the refrigerant passing through the heat dissipation unit 70 is a heat dissipation unit ( 70 is delivered to the condensate (W), and the refrigerant passing through the heat dissipation unit 70 is further cooled immediately before the inflator 6 and then introduced into the inflator 6, and the refrigeration efficiency of the air conditioner is increased. .

That is, the refrigerant condensed in the actual condenser 4 exits the condenser 4 without being sufficiently cooled in the condenser 4, passes through the condenser-expander connection pipe 20, and then expands in the expander 6. If the refrigerant is not cooled by the condensate (W), the refrigerant is circulated in the process B-> C-> D-> E-> A-> B, as shown in FIG.

On the other hand, when the refrigerant is cooled by the condensate (W), even if the refrigerant passing through the condenser 4 is not sufficiently cooled in the condenser 4, the heat dissipation unit 70 immediately before flowing into the expander (6) As it passes through, it is further cooled by the condensed water (W) in contact with the heat dissipation unit 70, and the refrigerant is B-> C-> D-> D '-> E'-> E->, as shown in FIG. Cycles from A to B.

That is, the refrigeration cycle of the air conditioner is shown in Figure 4 with a simple structure of bending a portion of the condenser-expander connection pipe 20 passing through the upper side of the drain pan 52 into the flow path 54 of the drain pan 52. As can be seen, the efficiency is increased by the area D-> D '-> E'-> E.

Meanwhile, as the condenser-expander connection pipe 20 and the evaporator-compressor connection pipe 40 are closer to each other, heat loss is generated due to mutual heat exchange, and the upper side of the drain pan 52 of the condenser-expander connection pipe 20 is formed. The heat dissipating part 70 is bent away from the evaporator-compressor connecting pipe 40 at a portion that passes, so that the heat dissipation is not generated as much as the heat dissipating part 70 is bent, and the two pipes 20 Heat loss due to the heat exchange of the (40) is minimized.

On the other hand, the present invention is not limited to the above embodiment, it is also possible that the lower portion of the heat dissipating portion 70 is formed of a rounded curved portion, it is a matter of course that various implementations are possible within the technical scope of the present invention.

1 is a schematic configuration diagram of an air conditioner according to the prior art,

2 is an actual P-H diagram of a refrigeration cycle of an air conditioner according to the prior art,

3 is a schematic configuration diagram of an air conditioner according to the present invention;

4 is a P-H diagram of a refrigeration cycle of an air conditioner according to the present invention;

5 is a partial perspective view of an air conditioner according to the present invention;

6 is a longitudinal cross-sectional view of the drain pan shown in FIG. 5;

FIG. 7 is a cross-sectional view of the drain pan shown in FIG. 5.

Description of the main parts of the drawing

2: compressor 4: condenser

6: inflator 8: evaporator

10: compressor-condenser connection piping 20: condenser-expander connection piping

24: high temperature indoor unit piping 30: inflator-evaporator connection piping

40: evaporator-compressor piping 44: low temperature indoor unit piping

50: drain mechanism 52: drain pan

54: Euro 62: drain hose

66: heat dissipation part fixing part 70: heat dissipation part

72: straight portion W: condensate

Claims (8)

 A compressor, a condenser, an expander, and an evaporator are connected to a refrigerant pipe, and a drain pan having a flow path for receiving and draining condensed water generated and dropped from the evaporator is installed below the evaporator, and a refrigerant between the condenser and the expander. The pipe is an air conditioner in which a heat radiating portion for dissipating heat to the condensate is bent in the flow path while passing through the upper side of the drain pan, The heat dissipation portion is bent such that the refrigerant passing through the heat dissipation portion flows in a direction opposite to the condensate, And a refrigerant pipe between the evaporator and the compressor is partially disposed to pass over the drain pan. delete delete delete delete delete The method of claim 1, And the drain fan has a heat dissipation part fixing part for fixing the heat dissipation part. delete

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