JP2015188785A - air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner capable of effectively preventing a blower fan from the adhesion of fine particles without increasing the draft resistance of an airflow.SOLUTION: An enclosure 26 of an air conditioner forms a passage 81 for an air flow. A charge electrode 73 is arranged in the passage 81. The charge electrode 73 discharges into an air flow thereby to charge a substance in the air flow. A blower fan 24 is arranged in the passage 81 downstream of the charge electrode 73 along the flow direction of the air flow, and has a conductive material at least partially on the surface. A voltage source 78 is connected with the conductive material 76 of the blower fan 24. The voltage source 78 feeds the conductive material 76 with a voltage of the same polarity as that of the discharge.

Description

  The present invention relates to an air conditioner and the like.

  For example, as disclosed in Patent Document 1, a prefilter is generally incorporated in an air conditioner. The prefilter removes dust from the airflow. Dust accumulation is prevented in the heat exchanger.

Japanese Patent No. 4270234

  Dust that is larger than the mesh of the prefilter is caught by the mesh sheet of the prefilter. On the other hand, fine particles such as dust smaller than the mesh pass through the mesh sheet. The fine particles adhere to the blower fan. The blower fan gets dirty. If the mesh of the mesh sheet is miniaturized, the cleanliness of the airflow passing through the mesh sheet is increased, but the airflow resistance of the airflow is remarkably increased and the cooling function and the heating function of the air conditioner are deteriorated.

  According to some aspects of the present invention, it is possible to provide an air conditioner that can effectively prevent fine particles from adhering to the blower fan without increasing the airflow resistance.

  One aspect of the present invention is a housing that forms a passage for airflow, a charging electrode that is disposed in the passage and discharges to the airflow to charge a substance such as dust in the airflow, A blower fan disposed downstream of the charging electrode along the flow direction of the airflow and having a conductive material at least partially on the surface, and connected to the conductive material of the blower fan, the conductive material is the same as the discharge. The present invention relates to an air conditioner including a voltage source that supplies a voltage of polarity.

  When the blower fan is activated, an air flow is generated in the passage. When discharging is performed from the charging electrode, fine particles such as dust in the air current are charged with a specific polarity. Since the electric material having the same polarity as that of the charging electrode is formed in the conductive material of the blower fan, the charged fine particles are bounced back to the conductive material of the blower fan. In this way, the blower fan is free from adhesion of fine particles. The adhesion of fine particles to the blower fan is effectively prevented.

  The air conditioner may further include a dust collection electrode that is disposed in the passage and has a conductive material that is at least partially opposed to the conductive material. The charged fine particles can adhere to the dust collecting electrode after being bounced back by the blower fan. The air conditioner can capture fine particles effectively while avoiding pressure loss.

  The dust collection electrode may be a heat exchanger having a conductive material arranged upstream of the blower fan along the flow direction of the air flow in the passage. A heat exchanger is originally accommodated in the housing. Therefore, it is not necessary to create a new arrangement space in the casing when arranging the dust collecting electrodes. An increase in the size of the housing can be avoided when the dust collecting electrode is additionally arranged.

  The air conditioner may further include a drain pan that is disposed below the heat exchanger in the direction of gravity in the passage and receives water drops falling from the surface of the heat exchanger. Condensation occurs on the surface of the heat exchanger during cooling operation. Condensed water droplets can be used to clean the surface of the heat exchanger. These drops are received by the drain pan. Fine particles adhering to the heat exchanger can be discarded together with water droplets.

  The conductive material of the dust collection electrode may be connected to the ground. When the fine particles adhere to the conductive material, electric charges are exchanged between the fine particles and the ground. The charged state of the conductive material is eliminated. Thus, it is possible to prevent the conductive material from having the same polarity as that of the charging electrode. Even if the adhesion amount of fine particles increases, new fine particles can reliably adhere to the conductive material. If a path for exchanging electric charges with the ground is not provided by the conductive material, a potential having the same polarity as the charged electrode is generated on the conductive material as the amount of charge attached increases, and according to the repulsive force of the same polarity. The adhesion of the fine particles is hindered.

  The dust collection electrode may be detachably attached to the housing. The removed dust collecting electrode can be cleaned. Thus, the fine particles adhering to the dust collecting electrode can be washed away.

  As described above, according to the disclosed air conditioner, adhesion of fine particles to the blower fan can be effectively prevented without increasing the airflow resistance.

It is a conceptual diagram which shows roughly the structure of the air conditioner which concerns on one Embodiment of this invention. It is a perspective view which shows roughly the external appearance of the indoor unit which concerns on 1st Embodiment. It is a perspective view which shows the structure of the main body of an indoor unit schematically. It is a disassembled perspective view which shows the structure of an indoor unit schematically. It is an expansion vertical sectional view of the main part of an indoor unit. FIG. 6 is an enlarged vertical sectional view schematically corresponding to FIG. 5 and schematically showing the appearance of the indoor unit according to the second embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

(1) Configuration of Air Conditioner FIG. 1 schematically shows a configuration of an air conditioner 11 according to an embodiment of the present invention. The air conditioner 11 includes an indoor unit 12 and an outdoor unit 13. The indoor unit 12 is installed in an indoor space in a building, for example. In addition, the indoor unit 12 may be installed in a space corresponding to the indoor space. An indoor heat exchanger 14 is incorporated in the indoor unit 12. The outdoor unit 13 includes a compressor 15, an outdoor heat exchanger 16, an expansion valve 17, and a four-way valve 18. The indoor heat exchanger 14, the compressor 15, the outdoor heat exchanger 16, the expansion valve 17 and the four-way valve 18 form a refrigeration circuit 19.

  The refrigeration circuit 19 includes a first circulation path 21. The first circulation path 21 connects the first port 18a and the second port 18b of the four-way valve 18 to each other. A compressor 15 is provided in the first circulation path 21. The suction pipe 15a of the compressor 15 is connected to the first port 18a of the four-way valve 18 via a refrigerant pipe. The gas refrigerant is supplied to the suction pipe 15a of the compressor 15 from the first port 18a. The compressor 15 compresses the low-pressure gas refrigerant to a predetermined pressure. The discharge pipe 15b of the compressor 15 is connected to the second port 18b of the four-way valve 18 via a refrigerant pipe. Gas refrigerant is supplied from the discharge pipe 15 b of the compressor 15 to the second port 18 b of the four-way valve 18. The refrigerant pipe may be a copper pipe, for example.

  The refrigeration circuit 19 further includes a second circulation path 22. The second circulation path 22 connects the third port 18c and the fourth port 18d of the four-way valve 18 to each other. The outdoor heat exchanger 16, the expansion valve 17, and the indoor heat exchanger 14 are incorporated into the second circulation path 22 in order from the third port 18c side. The outdoor heat exchanger 16 exchanges heat energy between the refrigerant passing therethrough and ambient air. The indoor heat exchanger 14 exchanges thermal energy between the refrigerant passing therethrough and ambient air. The second circulation path 22 may be formed by a refrigerant pipe such as a copper pipe.

  A blower fan 23 is incorporated in the outdoor unit 13. The blower fan 23 ventilates the outdoor heat exchanger 16. The blower fan 23 generates an air flow according to the rotation of the impeller, for example. The airflow passes through the outdoor heat exchanger 16. The flow rate of the airflow passing through is adjusted according to the rotational speed of the impeller.

  A blower fan 24 is incorporated in the indoor unit 12. The blower fan 24 ventilates the indoor heat exchanger 14. The blower fan 24 generates an air flow according to the rotation of the impeller. Indoor air is sucked into the indoor unit 12 by the action of the blower fan 24. The indoor air passes through the indoor heat exchanger 14 and exchanges heat with the refrigerant. The heat-exchanged cold air or warm air flow is blown out from the indoor unit 12. The flow rate of the airflow passing through is adjusted according to the rotational speed of the impeller.

  When the cooling operation is performed in the refrigeration circuit 19, the four-way valve 18 connects the second port 18b and the third port 18c to each other and connects the first port 18a and the fourth port 18d to each other. Therefore, high-temperature and high-pressure refrigerant is supplied to the outdoor heat exchanger 16 from the discharge pipe 15 b of the compressor 15. The refrigerant flows through the outdoor heat exchanger 16, the expansion valve 17, and the indoor heat exchanger 14 in order. The outdoor heat exchanger 16 radiates heat from the refrigerant to the outside air. The refrigerant is decompressed to a low pressure by the expansion valve 17. The decompressed refrigerant absorbs heat from the surrounding air in the indoor heat exchanger 14. Cold air is generated. The cold air is blown out into the indoor space by the function of the blower fan 24.

  When the heating operation is performed in the refrigeration circuit 19, the four-way valve 18 connects the second port 18b and the fourth port 18d to each other and connects the first port 18a and the third port 18c to each other. A high-temperature and high-pressure refrigerant is supplied from the compressor 15 to the indoor heat exchanger 14. The refrigerant flows through the indoor heat exchanger 14, the expansion valve 17, and the outdoor heat exchanger 16 in order. The indoor heat exchanger 14 radiates heat from the refrigerant to the surrounding air. Warm air is generated. Warm air is blown into the indoor space by the function of the blower fan 24. The refrigerant is decompressed to a low pressure by the expansion valve 17. The decompressed refrigerant absorbs heat from the surrounding air in the outdoor heat exchanger 16. Thereafter, the refrigerant returns to the compressor 15.

(2) Configuration of Indoor Unit According to First Embodiment FIG. 2 schematically shows the external appearance of the indoor unit 12 according to one embodiment. An outer panel 27 covers the main body 26 of the indoor unit 12. An air outlet 28 is formed on the lower surface of the main body 26. The blower outlet 28 is opened toward the room. The main body 26 can be fixed to an indoor wall surface, for example. The blower outlet 28 blows out the cool air or the warm air generated by the indoor heat exchanger 14.

  A pair of front and rear wind direction plates 31a and 31b are arranged at the outlet 28. The up-and-down wind direction plates 31a and 31b can rotate around the horizontal axes 32a and 32b, respectively. The vertical airflow direction plates 31a and 31b can open and close the air outlet 28 according to the rotation. The direction of the airflow to be blown out is changed according to the angle of the up / down airflow direction plates 31a, 31b.

  As shown in FIG. 3, a suction port 33 is formed in the main body 26. The suction port 33 opens at the front and top surfaces of the main body 26. The outer panel 27 can be covered with the suction port 33 in front of the main body 26. Air flowing into the indoor heat exchanger 14 is taken in from the suction port 33.

  A plurality of air filter assemblies 34 having the same shape are arranged in the suction port 33 over the longitudinal direction of the suction port 33. The air filter assembly 34 includes an air filter 35 and a holding portion 36. The air filter 35 is held by the holding unit 36. The holding part 36 has a frame body 37. The holding part 36 is fixed to the main body 26 by a frame body 37. When the holding portion 36 is set on the main body 26, the air filter 35 is disposed over the entire surface of the suction port 33.

  A frame 37 of the holding portion 36 is provided with a front filter rail 38 that holds a frame portion of an air filter 35 described later. A rear filter rail 39 is provided on the main body 26 corresponding to the front filter rail 38. The filter rails 38 and 39 form a continuous path. The filter rails 38 and 39 are provided along a vertical plane orthogonal to the horizontal axes 32a and 32b so as to slidably hold the left and right ends of the air filter 35. The air filter 35 moves along the filter rails 38 and 39.

  As shown in FIG. 4, the blower fan 24 is rotatably supported by the main body 26. For example, a cross flow fan is used as the blower fan 24. The blower fan 24 can rotate around a rotation shaft 41 parallel to the horizontal axes 32a and 32b. The rotating shaft 41 of the blower fan 24 extends in the horizontal direction when the main body is installed. The blower fan 24 is disposed in parallel with the air outlet 28. The blower fan 24 rotates around the rotation shaft 41. The airflow passes through the indoor heat exchanger 14 according to the rotation of the blower fan 24. As a result, a cold or warm air stream is generated. Cold air or warm air is blown out from the air outlet 28.

  The indoor heat exchanger 14 includes a front side body 14a and a rear side body 14b. The front body 14 a faces the blades of the blower fan 24 from the front side of the blower fan 24. The rear body 14 b is opposed to the blades of the blower fan 24 from the rear side of the blower fan 24. The front body 14a and the rear body 14b are connected to each other at the upper end. The front side body 14a and the rear side body 14b have a refrigerant pipe 42a. The refrigerant pipe 42a reciprocates in the horizontal direction. That is, the refrigerant pipe 42a extends parallel to the horizontal axes 32a and 32b, is folded at the left and right ends of the main body 26 when viewed from the front, extends again parallel to the horizontal axes 32a and 32b, and is folded again at the left and right ends of the main body 26 when viewed from the front. These are repeated. The refrigerant pipe 42 a constitutes a part of the second circulation path 22. A plurality of heat radiation fins 42b are coupled to the refrigerant pipe 42a. The heat radiating fins 42b extend in parallel to each other while being orthogonal to the horizontal axes 32a and 32b. The refrigerant pipe 42a and the heat radiation fin 42b can be formed from a metal material such as copper or aluminum. Heat exchange is realized between the refrigerant and the air through the refrigerant pipe 42a and the radiation fins 42b.

  As shown in FIG. 4, the air filter assembly 34 includes a filter cleaning unit 43. The filter cleaning unit 43 includes an upper dust box 45 and a lower dust box 46. The upper dust box 45 and the lower dust box 46 have a frame 37 of the holding portion 36. The upper dust box 45 is disposed on the front side of the air filter 35. The upper dust box 45 has a cover 47. The cover 47 is provided so as to cover the dust storage part 49 of the box body 48 so as to be openable and closable. The lower dust box 46 is disposed on the rear surface side of the air filter 35. The upper dust box 45 and the lower dust box 46 are arranged in the horizontal direction with respect to the air filter 35. When cleaning the air filter 35, dust on the front surface of the air filter 35 is generally collected in the box body 48 of the upper dust box 45, and dust on the rear surface of the air filter 35 is collected in the lower dust box 46.

  The filter cleaning unit 43 includes a first driven gear 51 and a second driven gear 52. The first driven gear 51 is attached to the upper dust box 45. The first driven gear 51 rotates around the horizontal axis 53. The first driven gear 51 rotates a cleaning brush described later in the upper dust box 45. The teeth of the first driven gear 51 are at least partially exposed from the outer surface of the upper dust box 45. Similarly, the second driven gear 52 is attached to the lower dust box 46. The second driven gear 52 rotates around the horizontal axis 54. The second driven gear 52 is provided at both ends of the lower dust box 46 and drives the air filter 35 as will be described later. The teeth of the second driven gear 52 are partially exposed from the outer surface of the lower dust box 46. When the air filter assembly 34 is set on the main body 26, the first driven gear 51 meshes with a first drive gear (not shown) mounted on the main body 26, and similarly, the second driven gear 52 is mounted on the main body 26. Engage with two drive gears (not shown). A drive source (not shown) such as an electric motor is individually connected to the first drive gear and the second drive gear. The first driven gear 51 and the second driven gear 52 rotate individually according to the driving force supplied from the individual driving sources.

  An ionizer 55 is fixed to the outer surface of the upper dust box 45. The casing 56 of the ionizer 55 may be provided integrally with the cover 47 of the upper dust box 45. The casing 56 of the ionizer 55 is formed with openings 57 in the vertical direction. Ions and ozone are emitted from the opening 57. The released ions and ozone are dispersed in the space between the outer panel 27 and the air filter 35. The ionizer 55 is electrically connected to a control unit (not shown) in the main body 26 by wiring (not shown). The wiring of the ionizer 55 has a detachable electrical contact. When the air filter assembly 34 is attached and detached, the wiring is connected and disconnected. Operating power is supplied to the ionizer 55 through the wiring.

  As shown in FIG. 5, the filter cleaning unit 43 includes a cleaning brush 66. The cleaning brush 66 is stored in the upper dust box 45. The cleaning brush 66 includes a brush pedestal 67. The brush pedestal 67 can rotate around the horizontal axis 68 by the driving force from the first driven gear 51. The brush bristles 69 are arranged on a cylindrical surface of the brush pedestal 67 over a predetermined center angle range. The flocking range of the brush bristles 69 has a spread across the air filter 35 in the axial direction of the brush pedestal 67. The cleaning brush 66 brings the bristles 69 into contact with the air filter 35 at a predetermined rotational position, and separates the bristles 69 from the air filter 35 at other than the rotational position. When the air filter 35 moves in a direction along a vertical plane orthogonal to the horizontal axes 32 a and 32 b in a state where the brush bristles 69 are in contact with the air filter 35, the dust adhering to the front surface of the air filter 35 is entangled with the bristles 69. Can be done.

  The filter cleaning unit 43 includes a brush receiver 71. The brush receiver 71 is accommodated in the lower dust box 46. The brush receiver 71 has a receiving surface 72. The receiving surface 72 is opposed to the cleaning brush 66. When the bristle 69 contacts the air filter 35, the receiving surface 72 sandwiches the air filter 35 between the bristle 69. In addition, brush hair may be planted on the receiving surface 72.

  The ionizer 55 has a charging electrode 73. The charging electrode 73 is supplied with a high voltage from the charging electrode high voltage power supply 74 of the main body 26 and is discharged into the air. Ions and ozone are generated by the discharge. The ions and ozone thus generated are emitted from the opening 57 of the ionizer 55.

  A driving source 75 is connected to the blower fan 24. The drive source 75 may be composed of, for example, an electric motor. The driving source 75 applies a driving force of the blower fan 24 around the rotation shaft 41. The drive source 75 is supported by the main body 26, for example. The drive source 75 should just have a drive shaft connected with the rotating shaft of the ventilation fan 24. FIG.

  The blower fan 24 has a conductive material on the surface at least partially. Here, the body of the cross flow fan and the surface of the blades are covered with a film 76 of a conductive material. For example, aluminum or stainless steel may be used as the conductive material. The indoor heat exchanger 14 is opposed to the coating 76 of the blower fan 24. The indoor heat exchanger 14 is connected to the ground 77.

  A voltage source 78 is connected to the coating 76. The voltage source 78 may be supported by the main body 26, for example. The voltage source 78 supplies a voltage having the same polarity as the discharge of the charging electrode 73 to the conductive film 76. In response to such voltage supply, an electric field having the same polarity as that of the charging electrode 73 is formed in the coating 76 of the blower fan 24. The voltage of the voltage source 78 may be supplied to the coating 76 via the drive shaft of the drive source 75, for example.

  In order to electrically connect the voltage source 78 to the coating 76, for example, an electrical contact may be provided on the rotating shaft of the blower fan 24. Specifically, a voltage is applied to the conductive terminal that contacts the rotating shaft of the blower fan 24 provided on the opposite side of the drive source 75 so that the voltage is supplied to the coating 76 provided on the surface of the blower fan 24. do it.

  A drain pan 79 is accommodated in the main body 26. The drain pan 79 is disposed below the indoor heat exchanger 14 in the direction of gravity. The drain pan 79 can receive water drops falling from the surface of the indoor heat exchanger 14. A drain pipe (not shown) is connected to the drain pan 79. The water in the drain pan 79 is guided to the outside of the main body 26 through the drain pipe.

  Inside the main body 26, an airflow passage 81 is formed from the suction port 33 toward the blowout port 28. In the passage 81, the blower fan 24 is disposed downstream of the charging electrode 73. The indoor heat exchanger 14 is opposed to the blower fan 24 in the passage 81. The indoor heat exchanger 14 is disposed upstream of the blower fan 24 in the passage 81 along the flow direction of the airflow. An air filter 35 is disposed upstream of the indoor heat exchanger 14 along a cross-section 82 across the passage 81 (from the rear end side of the upper surface of the suction port 33 to the lower side of the entire surface). An ionizer 55 is disposed upstream of the air filter 35.

(3) Operation of the indoor unit When the blower fan 24 is activated during normal cooling operation or heating operation, an air flow is generated along the passage 81 from the suction port 33 toward the blowout port 28 in the main body 26. The air sucked from the suction port 33 passes through the air filter 35 and passes through the indoor heat exchanger 14. The heat exchanger performs heat exchange between the airflow and the refrigerant. During the cooling operation, the air is cooled by the indoor heat exchanger 14 and blown out from the outlet 28. During the heating operation, the air is warmed by the indoor heat exchanger 14 and blown out from the outlet 28. In this way, cold air and warm air are generated.

  When discharging is performed from the charging electrode 73, fine particles such as dust in the air current are charged with a specific polarity. Since an electric field having the same polarity as that of the charging electrode 73 is formed in the blower fan 24, the charged fine particles are rebounded by the blower fan 24. Thus, the blower fan 24 is free from the adhesion of fine particles. The adhesion of fine particles to the blower fan 24 is effectively prevented.

  Since the electric potential of the indoor heat exchanger 14 is ground, the charged fine particles can adhere to the indoor heat exchanger 14 after being bounced off from the blower fan 24. Thus, the conductive material of the indoor heat exchanger 14 can function as a dust collecting electrode. The air conditioner can capture fine particles effectively while avoiding pressure loss. The indoor heat exchanger 14 is originally accommodated in the main body 26. Therefore, it is not necessary to create a new arrangement space in the main body 26 when arranging the dust collecting electrode. When the dust collecting electrode is additionally arranged, the main body 26 can be prevented from being enlarged.

  Condensation occurs on the surface of the indoor heat exchanger 14 during cooling operation. Condensed water droplets can be used to clean the surface of the indoor heat exchanger 14. Such water droplets are received by the drain pan 79. Fine particles adhering to the indoor heat exchanger 14 can be discarded together with water droplets.

  When the fine particles adhere to the indoor heat exchanger 14, electric charges are exchanged between the fine particles and the ground. The charged state of the fine particles is eliminated. Thus, the indoor heat exchanger 14 can be prevented from having the same polarity as that of the charging electrode 73. Even if the adhesion amount of fine particles increases, new fine particles can reliably adhere to the indoor heat exchanger 14. If the film 76 does not have a path for exchanging charges with the ground, a potential having the same polarity as that of the charging electrode 73 is generated on the film 76 with an increase in the amount of attached charge, and the repulsive force having the same polarity is applied. Therefore, the adhesion of fine particles is hindered.

  The operation of the filter cleaning unit 43 when the air filter 35 is cleaned will be described. The bristle 69 of the cleaning brush 66 comes into contact with the front surface of the air filter 35 in accordance with the rotation operation of the brush base 67. At this time, the rear surface of the air filter 35 is received by the receiving surface 72 of the brush receiver 71. The air filter 35 is sandwiched between the bristle 69 and the receiving surface 72. When the second driven gear 52 is driven, the air filter 35 moves back and forth along the filter rails 38 and 39. As the air filter 35 moves, the brush bristles 69 trace the front surface of the air filter 35. Thus, the bristle 69 entangles large dust from the front surface of the air filter 35. The entangled dust is accommodated in the upper dust box 45.

(4) Configuration of Indoor Unit According to Second Embodiment As shown in FIG. 6, a dust collecting electrode 83 may be disposed in the main body 26 as a conductive material instead of the indoor heat exchanger 14. The dust collecting electrode 83 may be detachably fixed to the main body 26. The dust collection electrode 83 has a surface of a conductive material that is at least partially opposed to the blower fan 24. Fine particles bounced from the blower fan 24 can adhere to the dust collecting electrode 83. In addition, the removed dust collecting electrode 83 can be cleaned. Thus, the fine particles adhering to the dust collecting electrode 83 can be washed away. The dust collection electrode 83 is connected to the ground. Note that the polarity of the dust collecting electrode may be any polarity as long as at least the charging electrode is different from the electrode that charges the dust in the air.

  DESCRIPTION OF SYMBOLS 11 Air conditioner, 14 Heat exchanger (indoor heat exchanger) as a dust collection electrode, 24 Fan, 26 Housing | casing (main body), 73 Charging electrode, 76 Conductive material (coating), 77 Ground, 78 Voltage source, 79 Drain pan, 81 passage, 83 dust collecting electrode.

Claims (4)

A housing forming an airflow passage;
A charging electrode that is disposed in the passage and discharges into the airflow to charge a substance in the airflow;
A blower fan disposed downstream of the charging electrode along the flow direction of the air flow in the passage, and having a conductive material at least partially on the surface;
An air conditioner comprising: a voltage source connected to the conductive material of the blower fan and supplying a voltage having the same polarity as the discharge by the charging electrode to the conductive material.   2. The air conditioner according to claim 1, further comprising a dust collection electrode that is disposed in the passage and downstream of the charging electrode and has a conductive material facing at least partially the conductive material. Air conditioner.   The air conditioner according to claim 2, wherein the dust collecting electrode is a heat exchanger having a conductive material disposed upstream of the blower fan along the flow direction of the air flow in the passage. Air conditioner.   4. The air conditioner according to claim 3, further comprising a drain pan disposed below the heat exchanger in the gravity direction in the passage to receive water drops falling from the surface of the heat exchanger. Air conditioner.

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