JP2002162052A - Air conditioner and indoor heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which can materialize the miniaturization of the device, the curtailment of manufacture process, and the reduction of manufacture cost, by simplifying the structure of an indoor heat exchanger, and the indoor heat exchanger. SOLUTION: An indoor heat exchanger 11 is equipped with a heat conductive pipe tot consisting of a reheating pipe section 107 functioning as a condenser in reheating dry mode and a dehumidifying pipe section 108 functioning as an evaporator, pressure-reducing motor-operated valve 8 being arranged between the reheating pipe section 107 of the heat conductive pipe 101 and the dehumidifying pipe section 108, a reheating section 109 where the reheating pipe section 107 of the heat conductive pipe 101 is inserted, and a dehumidifying section 110 where the dehumidifying pipe section 108 of the heat conductive pipe 101 is inserted. The exchanger is further equipped with a plurality of fins 102 to which the reheating section 109 and the dehumidifying section 110 are connected through a heat insulating section 111 having an opening 112 for heat insulation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a refrigerant circuit to which a compressor, an outdoor heat exchanger, an indoor heat exchanger and the like are connected, and a part of the indoor heat exchanger is made to function as a condenser, and the other part is operated. The present invention relates to an air conditioner having a reheat dry mode for performing a dehumidifying operation without unnecessarily lowering the room temperature by functioning as an evaporator and an indoor heat exchanger used in such an air conditioner.

[0002]

2. Description of the Related Art A heat exchanger provided inside an indoor unit of an air conditioner includes a plurality of fins formed of plate-like members arranged at predetermined intervals, and a direction in which the fins are inserted through the fins. Heat transfer tubes that are sequentially connected at both ends to form a refrigerant path. One end of the refrigerant path formed by the heat transfer tube is connected to the liquid pipe side of the refrigerant pipe, and the other end is connected to the gas pipe side of the refrigerant pipe. During operation, the air flow is generated by a fan provided in the indoor unit such as a cross flow fan and the refrigerant is circulated in the refrigerant path, thereby performing heat exchange with the air contacting the fins and cooling or heating. Exhaust air from the vent.

[0003] The indoor heat exchanger is controlled so as to function as a condenser for condensing the refrigerant passing therethrough during a heating operation, and to function as an evaporator for evaporating the refrigerant passing therethrough during a cooling operation. Further, at the time of the dehumidifying operation, as in the case of the cooling operation, by functioning as an evaporator for evaporating the refrigerant passing therethrough, it becomes possible to condense and dehumidify the moisture contained in the contacting air.

In such a dehumidifying operation, since the operation is substantially the same as the cooling operation, there is a possibility that the room air may be cooled more than necessary. For this reason, a decompression electric valve is provided in the middle of the heat transfer tube of the indoor heat exchanger, and by controlling this decompression electric valve, a part thereof functions as a condenser,
An air conditioner having a reheat dry mode in which another portion functions as an evaporator has been proposed. In the reheat dry mode, dehumidification is performed in the evaporator portion of the indoor heat exchanger and heating is performed in the condenser portion, so that dehumidification can be performed without lowering the room temperature more than necessary.

[0005]

The indoor heat exchanger used in the air conditioner having the reheat dry mode as described above includes a dehumidifier functioning as an evaporator and a reheater functioning as a condenser in the reheat dry mode. In many cases, the heat part is composed of different fins. That is, a heat exchanger constituting the dehumidifying section and a heat exchanger constituting the reheating section are separately created,
The air flow is arranged so as to pass through each heat exchanger, and the heat transfer tubes are connected via a pressure reducing electric valve.

The fins of the heat exchanger are arranged in parallel at a predetermined distance in the length direction of the heat transfer tube, and are usually arranged in large numbers with small gaps in order to improve the heat exchange efficiency. It is. For this reason, when the indoor heat exchanger is configured by arranging the heat exchanger configuring the dehumidifying unit and the heat exchanger configuring the reheating unit in an overlapping manner, when each heat exchanger is displaced in the fin arrangement direction, There is a problem that the resistance in the air flow path increases and the air volume adjustment and the temperature adjustment become unstable.

[0007] Further, since at least two heat exchangers are installed in a stacked state, the thickness of the indoor heat exchanger is increased, and it is difficult to reduce the size of the indoor unit. Further, the manufacturing process becomes complicated, the number of working processes increases, and it is difficult to reduce costs.

[0008] In the present invention, an air conditioner and an indoor heat exchanger capable of simplifying the structure of the indoor heat exchanger, reducing the size of the apparatus, reducing the number of manufacturing steps, and reducing the manufacturing cost. The purpose is to provide.

[0009]

An air conditioner according to a first aspect of the present invention includes a refrigerant circuit to which a compressor, an outdoor heat exchanger, an indoor heat exchanger, and the like are connected. An air conditioner having a reheat dry mode in which a part functions as a condenser and the other part functions as an evaporator to perform a dehumidifying operation without lowering a room temperature more than necessary, and an indoor heat exchanger is provided. A heat transfer tube comprising a reheat tube functioning as a condenser and a dehumidification tube functioning as an evaporator in the reheat dry mode, being sequentially connected at both ends in the longitudinal direction; A pressure reducing electric valve disposed between the heat pipe portion and the dehumidification tube portion; a reheating portion having an insertion hole through which the reheating tube portion of the heat transfer tube is inserted; and an insertion hole through which the dehumidification tube portion of the heat transfer tube is inserted. A dehumidifying unit, and the reheating unit and the dehumidifying unit A plate-shaped member which is connected through a heat insulating portion having a use opening, characterized in that it comprises a plurality of fins arranged in parallel at predetermined intervals in the length direction of the heat transfer tube.

In this case, since the reheating portion and the dehumidifying portion of the fin are integrally connected via the heat insulating portion, the fin and the indoor heat exchanger using the fin can be easily manufactured, and the heat exchange can be easily performed. It is possible to configure a small and light indoor unit by thinning the device. Further, the heat-insulating opening provided in the heat-insulating portion makes it possible to reliably insulate the reheat portion and the dehumidifying portion of the fin.

[0011] An air conditioner according to a second aspect of the present invention is the air conditioner according to the first aspect, wherein the fin has a substantially rectangular shape extending in a direction orthogonal to a passing air flow;
It is characterized in that one of the reheating section and the dehumidifying section is disposed along the length direction such that the upstream side of the passing airflow and the other side are downstream.

In this case, since the air that has passed through the indoor heat exchanger is dehumidified in the dehumidifying section and heated in the reheating section, the temperature and humidity distribution of the air blown out from the indoor unit can be kept constant.

[0013] An air conditioner according to a third aspect of the present invention is the air conditioner according to the second aspect, wherein the fin reheating unit comprises:
The dehumidifying unit is located downstream of the passing airflow, and the dehumidifying unit is located upstream of the airflow.

In this case, dehumidification and reheating can be efficiently performed by heating the air dehumidified in the dehumidifying section in the reheating section. In particular, if the heating by the reheating unit is performed first, the air temperature deviates from the dew point temperature, and the amount of dehumidification by the dehumidification unit decreases. However, such inconvenience can be solved and the dehumidification efficiency can be improved.

An air conditioner according to a fourth aspect of the present invention is the air conditioner according to the second or third aspect, wherein the heat insulating portion of the fin is provided at a middle portion in the width direction of the fin along the length direction. It is characterized by having a plurality of heat insulating openings provided continuously.

In this case, the dehumidifying portion and the reheating portion of the fin can be reliably insulated from each other, and each portion can function efficiently in the reheating dry mode. The indoor heat exchanger according to claim 5 of the present invention is connected to a compressor, an outdoor heat exchanger and the like to form a refrigerant circuit, a part of which functions as a condenser and another part functions as an evaporator. An indoor heat exchanger used in an air conditioner having a reheat dry mode that performs a dehumidifying operation without lowering the room temperature more than necessary, and a refrigerant circuit is sequentially connected at both ends in the length direction to form a refrigerant circuit. A heat transfer tube comprising a reheat tube functioning as a condenser and a dehumidification tube functioning as an evaporator in the thermal dry mode; and a pressure reducing motor valve disposed between the reheat tube and the dehumidification tube of the heat transfer tube. A reheat portion having an insertion hole through which the reheat tube portion of the heat transfer tube is inserted, and a dehumidification portion having an insertion hole through which the dehumidification tube portion of the heat transfer tube is inserted, wherein the reheat portion and the dehumidification portion are used for heat insulation. Plate-shaped member connected via a heat insulating part having an opening There are, characterized in that it comprises a plurality of fins arranged at predetermined intervals in the length direction of the heat transfer tube.

In this case, since the reheating portion and the dehumidifying portion of the fin are integrally connected via the heat insulating portion, the fin and the indoor heat exchanger using the fin can be easily manufactured, and the heat exchange can be easily performed. It is possible to configure a small and light indoor unit by thinning the device. Further, the heat-insulating opening provided in the heat-insulating portion makes it possible to reliably insulate the reheat portion and the dehumidifying portion of the fin.

[0018] The indoor heat exchanger according to claim 6 of the present invention comprises:
The indoor heat exchanger according to claim 5, wherein the fin has a substantially rectangular shape extending in a direction orthogonal to a passing airflow, and one of the reheating unit and the dehumidifying unit includes: It is characterized by being arranged along the length direction, respectively, so that the air flow passing therethrough is upstream and the other is downstream.

In this case, since the air that has passed through the indoor heat exchanger is dehumidified in the dehumidifying unit and heated in the reheating unit, the temperature and humidity distribution of the air blown out from the indoor unit can be made constant.

[0020] The indoor heat exchanger according to claim 7 of the present invention comprises:
The indoor heat exchanger according to claim 6, wherein the dehumidifying portion of the fin is arranged downstream of the passing airflow, and the reheating portion is arranged upstream of the airflow. Features.

If the heating by the reheating unit is performed first, the air temperature deviates from the dew point temperature, and the amount of dehumidification by the dehumidifying unit is reduced. However, such a disadvantage is solved by the above-described structure and the dehumidifying efficiency is improved. Can be.

The indoor heat exchanger according to claim 8 of the present invention is the indoor heat exchanger according to claim 6 or 7,
The heat insulating portion of the fin is characterized in that it has a plurality of heat insulating openings continuously provided along the length direction at the widthwise intermediate portion of the fin.

In this case, the dehumidifying portion and the reheating portion of the fin can be reliably insulated from each other, and each portion can function efficiently in the reheating dry mode.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Schematic Configuration of Air Conditioner] A schematic configuration of an air conditioner to which one embodiment of the present invention is applied will be described based on a refrigerant circuit shown in FIG.

The refrigerant circuit used in this air conditioner is:
A compressor 3, a four-way switching valve 4 connected to a discharge side of the compressor 3, and an accumulator 5 connected to a suction side of the compressor 3
And an outdoor heat exchanger 6 connected to the four-way switching valve 4, and a main decompressor 7 composed of an electric expansion valve connected to the outdoor heat exchanger 6. These compressor 11, four-way switching valve 12, accumulator 13, outdoor heat exchanger 14, main decompressor 15
Are stored in the outdoor unit 1 installed outdoors.

Also, a wall-mounted type, a ceiling embedded type, a wall embedded type,
An indoor heat exchanger 11 housed in various indoor units 2 such as a built-in type installed in a top bag or a base bag is disposed in a refrigerant circuit. The indoor heat exchanger 11 is configured to be able to be divided into a reheating unit 9 and a dehumidifying unit 10 via a pressure reducing electric valve 8. The indoor heat exchanger 11 is controlled such that both the reheating unit 9 and the dehumidifying unit 10 function as a condenser during the heating operation, and both the reheating unit 9 and the dehumidifying unit 10 function as the evaporator during the cooling operation. . In the reheating dry mode, the reheating unit 9 of the indoor heat exchanger 11 is controlled to function as a condenser, and the dehumidifying unit 10 is controlled to function as an evaporator.

[Indoor Unit] As an example of the indoor unit 2, a free-built-in type that can be embedded in a ceiling or a wall surface and installed in a top bag, a local bag, or the like is shown in FIG. 2 as an exploded perspective view thereof. .

The indoor air-conditioning unit 2 includes an indoor heat exchanger 1
1, an indoor fan 12, an indoor fan motor 13 and the like are housed inside. In the fan storage space surrounded by the top plate portion 41, the side plate portions 42 and 43, the rear plate 51, and the fan mounting plate 52, an air flow path for blowing air sucked from below by the indoor fan 12 to the front is formed. The fan housing 53 is accommodated. Indoor fan 12
Is rotatably supported and stored in the fan housing 53.

The indoor fan 12 is a multi-blade centrifugal fan having a large number of blades arranged on a peripheral surface thereof to generate an airflow in a direction perpendicular to the rotation axis, and includes a shaft member 55 and a connecting member 56.
And is connected to the drive shaft of the indoor fan motor 13 to be rotationally driven. The indoor fan motor 13 is mounted on a motor mounting member 54 fixed to the fan storage space.

The indoor heat exchanger 11 is disposed on the front of the fan mounting plate 52. The fan mounting plate 52 is provided with an exhaust port 57 for exhausting the airflow generated by the indoor fan 12, and the air exhausted through the exhaust port 57 contacts the indoor heat exchanger 11. It is configured as follows. A rectifying plate 58 for rectifying the air discharged from the exhaust port 57 and a refrigerant temperature (evaporation temperature) in the indoor heat exchanger 11 are provided between the front surface of the fan mounting plate 52 and the indoor heat exchanger 11. A thermistor 59 for detecting the condensation temperature).

On the front surface of the indoor heat exchanger 11, an air filter 60 and a front panel 61 constituting a blowing duct are attached. Below the indoor unit 2, a suction duct 62 for sucking indoor air from the lower front surface and generating an airflow by the indoor fan 12 is attached.

Further, a drain pan 63 for collecting condensed water is provided from a lower portion of the indoor heat exchanger 11 to a lower portion of the side plates 42 and 43. An electrical component box 71 is attached to the outer surface of the side plate 43. The electrical component box 71
The electronic component box body 73 houses a printed circuit board 72 on which a control circuit is mounted, a power transformer 76, a terminal board 75, and the like, and a lid member 74.

Further, on the front surface of the indoor unit 2, a light receiving section 77 for transmitting and receiving signals to and from a remote controller is provided. The light receiving section 77 includes an infrared light receiving element for receiving an instruction signal by infrared rays from a remote controller, and an infrared light emitting element for transmitting various signals indicating the current operation status and the like. Is connected to a control circuit mounted on the printed circuit board 72.

[Indoor Heat Exchanger and Fin Shape] FIG. 3 shows a schematic configuration of a side cross section of the indoor heat exchanger 11. The indoor heat exchanger 11 includes a heat transfer tube 101 provided in a longitudinal direction and a fin 10 having an insertion hole for inserting the heat transfer tube 101.
2 is provided. The heat transfer tubes 101 are sequentially connected via folded portions 103 and 104 at both ends in the longitudinal direction, and constitute a reheating tube portion 107 located on the left side in the drawing and a dehumidifying tube portion 108 located on the right side in the drawing. I have.

One end of the reheat pipe 107 and one end of the dehumidification pipe 108 are connected to pipes 105 and 106 connected to the refrigerant circuit of the outdoor unit 1, respectively. It is connected.

The fin 102 has a reheating portion 109 in which an insertion hole 113 for inserting the reheating tube portion 107 of the heat transfer tube 101 is formed, and an insertion hole 114 for inserting the dehumidification tube portion 108 of the heat transfer tube. Dehumidifying section 110 and reheating section 10
9 and a heat insulating part 111 for thermally separating the dehumidifying part 110. The heat insulating portion 111 is formed with a plurality of heat insulating openings 112 formed of long holes parallel to the length direction of the fins 102.
09 and the dehumidifying unit 110 are not easily transferred.

During operation in the reheat dry mode, the dehumidifying tube portion 108 of the heat transfer tube 101 is made to function as a condenser by controlling the pressure reducing electric valve 8, and the reheating tube portion 107 is operated.
Function as an evaporator. As a result, the air that comes into contact with the indoor heat exchanger 11 is cooled by coming into contact with the dehumidifying tube portion 108 of the heat transfer tube 101 and the dehumidifying portion 110 of the fin 102, and the moisture contained therein is condensed and dehumidified. At the same time, the reheating tube portion 107 of the heat transfer tube 101 and the reheating portion 109 of the fin 102 come into contact with each other and are heated.

Here, the fin 102 in which the reheating unit 109 and the dehumidifying unit 110 are integrally formed via the heat insulating unit 111
Is used, the indoor heat exchanger 11 can be easily manufactured, and an increase in air resistance due to displacement of the fins can be prevented. Further, the width of the fins 102 (in the left-right direction in FIG. 3) can be reduced, and the indoor heat exchanger 1
1 can be reduced in thickness, and the indoor unit 2 can be reduced in size and weight.

As shown in FIG. 3, by making the reheating section 109 of the fin 102 smaller in area than the dehumidifying section 110, a function of reheating and drying can be provided without reducing the dehumidifying efficiency. By changing the position and the shape of the heat insulating opening 112 provided, the balance between the dehumidifying function and the reheating function at the time of reheating and drying can be appropriately set.

Further, by setting the air flow generated by the indoor fan 12 in the indoor unit 2 so as to go from right to left in FIG. 3, the passing air is first dehumidified in the dehumidifying section 108, Since heating is performed by the post-reheating unit 107, the dehumidifying efficiency is not impaired.

[Other Embodiments] (A) The shape of the fin 102 may be as shown in FIG. In this case, the heat insulating portion 111 located between the reheating portion 109 and the dehumidifying portion 110 is provided with a triangular heat insulating opening 115 continuously.

Also in this case, the heat-insulating opening 115 allows
The heat transfer between the reheating unit 109 and the dehumidifying unit 110 is hardly performed, and the dehumidifying and reheating functions in the reheating dry mode can be efficiently performed. (B) The shape of the fin 102 may be as shown in FIG. In this case, the heat insulating portion 111 located between the reheating portion 109 and the dehumidifying portion 110 has a heat insulating opening 11 formed of a long hole provided in the entire length direction excluding the end portion.
6, 117 are provided doubly in the width direction.

In this case, the heat insulating openings 116 and 117 can maintain a high heat insulating property between the reheating unit 109 and the dehumidifying unit 110, so that the dehumidifying and reheating functions in the reheating dry mode can be efficiently performed. Can work. (C) The shape of the fins 102 may be as shown in FIG. In this case, the insertion holes 104 in the dehumidifying unit 110 are provided in a double manner in the width direction. Accordingly, in the reheat dry mode, the heat transfer tubes constituting the dehumidification tube portion are formed doubly with respect to the passing airflow, and the dehumidification efficiency can be improved.
Further, even during the normal operation, the contact area between the heat transfer tubes and the fins 102 increases, so that the efficiency of the heating operation and the cooling operation is improved.

[0044]

In the air conditioner according to the first aspect of the present invention, since the reheating portion and the dehumidifying portion of the fin are integrally connected via the heat insulating portion, the fin and the indoor using the fin are provided. The manufacture of the heat exchanger is easy, and the heat exchanger can be thinned to form a small and light indoor unit. Further, the heat-insulating opening provided in the heat-insulating portion makes it possible to reliably insulate the reheat portion and the dehumidifying portion of the fin.

In the air conditioner according to claim 2 of the present invention,
Since the air that has passed through the indoor heat exchanger is dehumidified in the dehumidifying unit and heated in the reheating unit, the temperature and humidity distribution of the air blown out from the indoor unit can be kept constant.

In the air conditioner according to claim 3 of the present invention,
By heating the air dehumidified in the dehumidifying section in the reheating section, dehumidification and reheating can be performed efficiently. In particular, if the heating by the reheating unit is performed first, the air temperature departs from the dew point temperature, and the amount of dehumidification by the dehumidification unit decreases,
Such inconvenience can be solved and the dehumidification efficiency can be improved.

In the air conditioner according to claim 4 of the present invention,
The dehumidifying portion and the reheating portion of the fin can be reliably insulated from each other, and each portion can function efficiently in the reheating dry mode.

In the indoor heat exchanger according to the fifth aspect of the present invention, since the reheating portion and the dehumidifying portion of the fin are integrally connected via the heat insulating portion, the fin and the indoor heat using the fin are formed. The heat exchanger can be easily manufactured, and the heat exchanger can be thinned to form a small and light indoor unit. Further, the heat-insulating opening provided in the heat-insulating portion makes it possible to reliably insulate the reheat portion and the dehumidifying portion of the fin.

In the indoor heat exchanger according to the sixth aspect of the present invention, since the air passing through the indoor heat exchanger is dehumidified in the dehumidifying unit and heated in the reheating unit, the temperature of the air blown out from the indoor unit is reduced. The humidity distribution can be made constant.

In the indoor heat exchanger according to the seventh aspect of the present invention, the inconvenience that the air temperature deviates from the dew point temperature when the heating by the reheating unit is performed first, and the amount of dehumidification by the dehumidification unit is reduced, is solved. Dehumidification efficiency can be improved.

In the indoor heat exchanger according to the eighth aspect of the present invention, the dehumidifying portion and the reheating portion of the fin can be reliably insulated from each other, and each portion can function efficiently in the reheating dry mode. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a refrigerant circuit of an air conditioner employing one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an example of the indoor unit.

FIG. 3 is a side sectional view of the indoor heat exchanger.

FIG. 4 is a side view of a fin used in another embodiment.

FIG. 5 is a side view of a fin used in another embodiment.

FIG. 6 is a side view of a fin used in another embodiment.

[Explanation of symbols]

 2 Indoor Unit 11 Indoor Heat Exchanger 12 Indoor Fan 101 Heat Transfer Tube 102 Fin 107 Reheat Tube Unit 108 Dehumidification Tube Unit 109 Reheat Unit 110 Dehumidification Unit 111 Heat Insulation Unit 112 Heat Insulation Opening 113 Insertion Hole 114 Insertion Hole 115 Heat Insulation Opening 116 Thermal Insulation Opening 117 Heat insulation opening

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hitoshi Kawashima 1,000 Daiya Okamotocho, Kusatsu-shi, Shiga 2 Daiga Industries Co., Ltd.Shiga Works (72) Inventor Seiji Oka 1000 Otani Okamotocho, Kusatsu-shi, Shiga No.2 F-term (reference) in Daikin Industries, Ltd. Shiga Works 3L051 BE04 BE06 BF01

Claims (8)

[Claims] A refrigerant circuit to which a compressor (3), an outdoor heat exchanger (6), an indoor heat exchanger (11) and the like are connected is provided, and a part of the indoor heat exchanger (11) is condensed. An air conditioner having a reheat dry mode for performing a dehumidifying operation without unnecessarily lowering the room temperature by functioning as an air conditioner and allowing the other part to function as an evaporator, wherein the indoor heat exchanger (11) includes: The refrigerant circuit is sequentially connected at both ends in the longitudinal direction to form the refrigerant circuit, and includes a reheat pipe (107) functioning as a condenser and a dehumidifying pipe (108) functioning as an evaporator in the reheat dry mode. A heat pipe (101), a pressure-reducing electric valve (8) arranged between a reheat pipe part (107) and a dehumidification pipe part (108) of the heat transfer pipe (101), and a reheat pipe of the heat transfer pipe (101) Hole (1) through which the portion (107) is inserted. 13) and a dehumidifying section (110) having an insertion hole (114) through which the dehumidifying pipe section (108) of the heat transfer tube (101) is inserted. 109) and a dehumidifying section (110) are plate-like members connected via a heat insulating section (111) having heat insulating openings (112, 115, 116, 117);
An air conditioner comprising: a plurality of fins (102) arranged in parallel at predetermined intervals in a length direction of the heat transfer tube (101). 2. The fin (102) has a substantially rectangular shape extending in a direction perpendicular to the air flow passing therethrough, and is provided with one of the reheating section (109) and the dehumidifying section (110). Are arranged along the length direction, respectively, so that the air flow passing therethrough is upstream and the other is downstream.
The air conditioner according to claim 1. 3. A reheating section (109) of the fin (102).
Is the downstream side of the passing airflow, and the dehumidifying unit (110)
The air conditioner according to claim 2, wherein the air conditioner is disposed upstream of the airflow. 4. A heat insulating portion (111) of said fin (102).
Are a plurality of heat-insulating openings (112, 112) provided continuously along the length direction at the widthwise intermediate portion of the fin (102).
115, 116, 117).
The air conditioner according to item 1. 5. A refrigerant circuit is formed by being connected to a compressor (3), an outdoor heat exchanger (6), and the like, a part of which functions as a condenser and another part functions as an evaporator. Indoor heat exchanger (1) used in an air conditioner having a reheat dry mode that performs a dehumidifying operation without lowering the room temperature
1) wherein the refrigerant circuit is sequentially connected at both ends in the longitudinal direction to form the refrigerant circuit, and a reheat pipe part (107) functioning as a condenser and a dehumidifying pipe part functioning as an evaporator in a reheat dry mode ( A heat transfer tube (101) comprising a heat transfer tube (108), a pressure reducing electric valve (8) disposed between a reheat tube portion (107) and a dehumidification tube portion (108) of the heat transfer tube (101); A reheat portion (109) having an insertion hole (113) through which the reheat tube portion (107) of (101) is inserted, and an insertion hole (114) through which the dehumidification tube portion (108) of the heat transfer tube (101) is inserted. ), And the reheating section (109) and the dehumidifying section (110) are connected via a heat insulating section (111) having heat insulating openings (112, 115, 116, 117). A plate-shaped member,
A plurality of fins (102) arranged in parallel at predetermined intervals in the length direction of the heat transfer tube (101). 6. The fin (102) has a substantially rectangular shape extending in a direction perpendicular to the air flow passing therethrough, and includes one of the reheating section (109) and the dehumidifying section (110). Are arranged along the length direction, respectively, so that the air flow passing therethrough is upstream and the other is downstream.
The indoor heat exchanger according to claim 5. 7. A reheating section (109) of the fin (102).
Is the downstream side of the passing airflow, and the dehumidifying unit (110)
The indoor heat exchanger according to claim 6, wherein the indoor heat exchanger is disposed so as to be upstream of the air flow. 8. The heat insulating portion (111) of the fin (102).
Are a plurality of heat-insulating openings (112, 112) provided continuously along the length direction at the widthwise intermediate portion of the fin (102).
115, 116, 117).
An indoor heat exchanger according to item 1.