JP2012107820A - Outdoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit of air conditioner that suppresses re-freezing, even in a point in which a heater cannot be installed in a lower part of the bottom of an outdoor heat exchanger, and has an improved reliability.SOLUTION: The outdoor unit of air conditioner has: a drain pan 31 which is installed in the lower part of the outdoor heat exchanger 15 and a drain hole 33 for discharging dissolved water frosted to the outdoor heat exchanger 15; a heating member 32 which is arranged along the upper part of an extension face 35 of the drain pan 31; and a fixed member 34 which fixes the heating member 32 to the extension face 35 by abutting on part of the heating member 32. The fixed member 34 has a heat transmission part 41 which is arranged so as to tightly adhere to or contact with a point of the drain pan 31 which is located in the lower part of the bottom of the heat exchanger 15 along the point, and to which the heat of the heating member 32 is transmitted.

Description

  The present invention relates to an outdoor unit of an air conditioner related to prevention of freezing of dew water in a heat exchanger in the outdoor unit.

There exists patent document 1 as background art which concerns on this invention.
Patent Document 1 states that “in the outdoor unit in which the heat exchanger is installed on the outdoor unit base, the shape of the tubular heater is similar to the outer peripheral shape of the bottom of the heat exchanger, or substantially the same as the outer peripheral shape of the heat exchanger. Form a size shape and install it so as to surround the heat exchanger, or install so that more than half of the heater shape is under the heat exchanger "(see claim 1) Yes.

JP 2004-69220 A

  By the way, Patent Document 1 describes a technique related to prevention of freezing by an outdoor unit-based drain heater in which a heat exchanger in an outdoor unit of an air conditioner is installed. However, the outdoor unit of the air conditioner of Patent Document 1 cannot install a heater below the heat exchanger at a drain pan where the heater cannot be installed. In such an outdoor unit of an air conditioner, there is a possibility that the molten water may be re-frozen on the drain pan at a location where the heat of the heater does not reach.

  In view of the above-mentioned actual situation, the present invention is about a place where the heater cannot be installed in a shape that follows the outer peripheral shape of the bottom of the outdoor heat exchanger, or in a shape that is almost the same size as the outer peripheral shape of the outdoor heat exchanger. In addition, the re-freezing of molten water is suppressed, and an outdoor unit for an air conditioner with improved reliability is provided.

  In order to achieve the above object, the outdoor unit of the air conditioner according to the first aspect of the present invention is provided below the outdoor heat exchanger, and is provided with a drain hole for draining the frosted water frosted on the outdoor heat exchanger. A drain pan, a heating member provided along the extending surface of the drain pan, and a fixing member for fixing the heating member to the extending surface by contacting a part of the heating member. The member is provided in close contact with or in contact with the drain pan located below the bottom of the outdoor heat exchanger, and has a heat transfer portion to which heat of the heating member is transmitted.

  The outdoor unit of the air conditioner according to the second aspect of the present invention includes a drain pan provided below the outdoor heat exchanger and provided with a drain hole for draining molten water that has formed frost on the outdoor heat exchanger. A heating member provided along the extending surface; and a fixing member that fixes the heating member to the extending surface by contacting a part of the heating member, wherein the fixing member is the outdoor heat exchange And a heat transfer section that is provided between the bottom of the vessel and the portion of the drain pan located therebelow and to which the heat of the heating member is transmitted.

  ADVANTAGE OF THE INVENTION According to this invention, the re-freezing of molten water can be suppressed also about the location which cannot install a heater below the bottom part of an outdoor heat exchanger, and the outdoor unit of the air conditioner which improved reliability can be implement | achieved.

The perspective view of the whole structure of the air conditioner of 1st Embodiment concerning this invention. The internal structure perspective view which removed a part of outer casing of the outdoor unit of 1st Embodiment. (a) is a drain pan of the outdoor unit according to the first embodiment and a view taken along arrow A in FIG. 2 showing components related to the drain pan, and (b) is a perspective view of the fixture. (a) is a perspective view which shows the attachment state to the drain pan of the fixing tool of 2nd Embodiment, (b) is a perspective view of the fixing tool of 2nd Embodiment. The perspective view which shows the heat conductive flat part of the one end side of the fixing tool in the drain pan of 3rd Embodiment. (a) is the perspective view of the one end side of the fixing tool which shows the state which attached the fixing tool 45 of 4th Embodiment to the drain pan 31, (b) is the perspective view of the one end side of the fixing tool of 4th Embodiment.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
<< First Embodiment >>
The whole structure of the air conditioner 1 of 1st Embodiment is demonstrated using FIG. In addition, in FIG. 1, the connection state of the air conditioner 1 is shown, and the actual arrangement of the air conditioner 1 is different.

In the air conditioner 1, an indoor unit 2 arranged indoors and an outdoor unit 3 arranged outside are connected by a connection pipe 4 through which a refrigerant of a refrigeration cycle flows. In the indoor unit 2, the room air is conditioned by the heat exchange of the indoor air with the refrigerant flowing in the indoor heat exchanger (not shown) in the indoor unit 2.
The user operates the remote controller 10 toward the indoor unit 2 to send an operation signal to the indoor unit 2, and desired air conditioning is performed by the indoor unit 2.

  The indoor unit 2 has a configuration in which an indoor heat exchanger, an indoor blower (not shown), a dew tray, and the like are attached to a cabinet 5, and these are covered with a decorative frame 6 and a front panel 7 is attached to the front surface of the decorative frame 6. is there. An air inlet 8 for sucking room air is provided at the upper part of the decorative frame 6, and an air outlet 9 through which air harmonized with the temperature and humidity set by the user is provided at the lower part of the decorative frame 6. ing

  The indoor unit 2 includes a control board in an electrical component box (not shown) inside, and a microcomputer, an interface circuit, a drive circuit for the indoor blower, and the like are mounted on the control board. A control program for controlling the air conditioner 1 is burned into a ROM (Read Only Memory) of the microcomputer, and the control program is developed and executed in a RAM (Random Access Memory), thereby controlling the air conditioner 1. Done.

  The microcomputer receives detection signals from various sensors such as an indoor temperature sensor and an indoor humidity sensor (not shown) via the interface circuit, and receives an operation signal from the remote controller 10 at the light receiving unit. The microcomputer controls the indoor unit 2 such as controlling the indoor blower that blows conditioned air into the room, and controls communication with the outdoor unit 3.

FIG. 2 is a perspective view of the internal structure with a part of the outer casing 11 of the outdoor unit 3 removed.
The outdoor unit 3 includes a drain pan 31 that also serves as a drain receiver for dewed water to the base and the outdoor heat exchanger 15, a compressor 18 that constitutes a refrigeration cycle, an outdoor heat exchanger 15 that performs heat exchange between outside air and refrigerant, And the outdoor fan 16 which accelerates | stimulates the heat exchange of the outdoor heat exchanger 15 is mounted. The outdoor unit 3 is covered with an outer casing 11 (see FIG. 1), and a connection pipe 4 through which refrigerant from the indoor unit 2 flows is connected to the pipe connection valves v1 and v2.

When the user operates the air conditioner 1, a power cord (not shown) of the indoor unit 2 is connected to a power source, and the remote controller 10 is operated toward the indoor unit 2 to send an operation signal. Operations such as dehumidification and heating are performed.
In the case of driving such as cooling, when the operation signal of the driving operation is received from the remote controller 10 by the light receiving unit of the indoor unit 2, the microcomputer receives from the various sensors if the operation signal from the remote controller 10 or automatic operation is set. The operation mode such as cooling is determined based on the information.

  Next, the microcomputer instructs the control unit of the outdoor unit 2 to operate according to the determined operation mode, and drives the indoor blower of the indoor unit 2 shown in FIG. The room air is taken in, the room air is circulated through the indoor heat exchanger, and heat is exchanged with the refrigerant flowing through the indoor heat exchanger. On the other hand, the control unit of the outdoor unit 3 controls the compressor 18, the blower motor that drives the outdoor fan 16, the control valve that opens and closes the connection pipe 4, and the like according to instructions from the microcomputer of the indoor unit 2. The refrigerant is circulated through the refrigeration cycle, and the outdoor air is circulated from the outdoor air suction portion 11s to the outdoor heat exchanger 15 to exchange heat between the refrigerant flowing through the outdoor heat exchanger 15 and the outside air (outdoor air). Thus, operations such as cooling are performed.

The outdoor unit 3 will be further described in detail with reference to FIGS.
As shown in FIG. 1, the outer casing 11 that covers the outdoor unit 3 includes a front plate 12, a side plate 13, and a top plate 14, and a suction portion 11 s that takes outdoor air into the side plate 13 that faces the outdoor heat exchanger 15. (Refer to FIG. 2) is provided, and a fan grill 17 is provided on the front plate 12 facing the outdoor fan 16 so that air can freely flow.

As shown in FIG. 2, a partition plate 19 is disposed between the outdoor fan 16 and the compressor 18 in the outdoor unit 3 to partition the blower chamber 20 and the machine chamber 21.
In the blower chamber 20, as described above, the outdoor heat exchanger 15 that performs heat exchange between the outside air (outdoor air) and the flowing refrigerant, the outdoor fan that sends the outdoor air to the outdoor heat exchanger 15 so as to promote heat exchange. 16 is disposed.
The outdoor heat exchanger 15 is arranged from the side surface of the outdoor unit 3 to the rear surface (rear surface) and between the blower chamber 20 and the machine chamber 21, and ensures a heat exchange area as large as possible to increase heat exchange capacity. It is increasing.

The outdoor fan 16 is rotationally driven so that the outdoor heat exchanger 15 is on the upstream side and the fan grille 17 (see FIG. 1) is on the downstream side, and the outdoor air is circulated to the outdoor heat exchanger 15 as described above. The heat exchange between the refrigerant flowing through the outdoor heat exchanger 15 and the outside air is promoted.
The machine chamber 21 is provided with a compressor 18, an accumulator that separates the gaseous refrigerant from the liquid refrigerant and sends the refrigerant to the compressor 18, a refrigerant feed pipe through which the refrigerant flows, and the like.

  A drain pan 31 is provided below the outdoor heat exchanger 15. When the frosting amount of the moisture of the outdoor air to the outdoor heat exchanger 15 exceeds a predetermined amount during the heating operation in winter, the frosting is melted by starting the defrosting operation due to the temperature rise of the outdoor heat exchanger 15. The molten water is dropped onto the drain pan 31 and discharged out of the machine through the drain hole 33.

  In particular, in the air conditioner 1 used in a cold region or a snowy region, when the outdoor air (outside air) has a high humidity during heating operation, frost formation is likely to occur in the outdoor heat exchanger 15 of the heat source that becomes a low temperature due to heat absorption. Become. As described above, when frost is generated in the outdoor heat exchanger 15, the ventilation path of the outdoor air is narrowed, so that the heat exchange amount of the outdoor heat exchanger 15 is reduced. Along with this, the evaporation temperature of the refrigerant flowing through the outdoor heat exchanger 15 is lowered, so that the surface temperature of the outdoor heat exchanger 15 is lowered and frosting further proceeds, and the amount of heat pumped from the outdoor air by the outdoor heat exchanger 15 is reduced. To do. As a result, the amount of heat dissipated from the indoor heat exchanger of the indoor unit 2 is reduced, and the heating capacity may be reduced to impair indoor comfort. In addition, power consumption may increase.

However, for example, when the outside air temperature falls below the freezing point, the molten water melted by the defrosting operation may freeze again in the vicinity of the drain hole 33 before being discharged from the drain hole 33 and block the drain hole 33.
As described above, when the drain hole 33 is closed, the molten water is stored on the drain pan 31, and thus re-freezing of the molten water proceeds over a wide range on the drain pan 31. As a result, the outdoor heat exchanger 15 is covered with ice, so that there is a possibility that the heating capacity is lowered and the indoor comfort is impaired.

In order to prevent such re-freezing on the drain pan 31, a tubular heater 32 for heating is installed on the bottom of the outdoor heat exchanger 15 and the drain pan 31.
FIG. 3A is a perspective view of the drain pan 31 and the parts related to the drain pan 31 of the outdoor unit 3 according to the first embodiment, and FIG. 3B is a perspective view of the fixture 34. FIG.
In the outdoor unit 3 according to the first embodiment, an example of a fixture 34 that fixes the heater 32 to the drain pan 31 and is provided along the bottom surface 35 of the drain pan 31 (see FIG. 3A) will be described.
In the outdoor unit 3, a drain pan 31 is provided below the outdoor heat exchanger 15 shown in FIG. 2, and serves as a base of the outdoor unit 3 and a water receiver for frosted molten water over the lower surface of the outdoor unit 3.

  A heater 32 for melting frost on the outdoor heat exchanger 15 is attached to the drain pan 31 below the outdoor heat exchanger 15 or in the vicinity of the outdoor heat exchanger 15. When the heater 32 enters between the bottom of the outdoor heat exchanger 15 and the drain pan 31, the heater 32 is provided on the drain pan 31 below the outdoor heat exchanger 15, while the bottom of the outdoor heat exchanger 15 and the drain pan 31 If it does not enter between the two, the heat sink 15 is provided on the drain pan 31 near the outdoor heat exchanger 15 that is shifted from directly below the outdoor heat exchanger 15.

In the following description, components related to the drain pan 31 (hereinafter, these are collectively referred to as a drain pan structure) will be mainly described, and description of other configurations will be omitted.
As shown in FIG. 3A, the drain pan structure around the drain pan 31 includes a drain pan 31 that also serves as a base and a drain receiver for the outdoor unit 3, a heater 32 for melting frost in the outdoor heat exchanger 15, and a heater 32. And a fixture 34 that also serves to transfer the heat of the heater 32 downward to the outdoor heat exchanger 15.

  The drain pan 31 includes a bottom surface 35 that is an extending surface, a water receiving bottom surface 36 that is formed to be recessed from the bottom surface 35 and that is provided below the bottom of the outdoor heat exchanger 15 and serves as a flow path for molten water, and This is a rectangular shallow dish-shaped container formed in combination with a bank portion 31d formed in a bank shape around 36.

  A drain hole 33 is formed in the drain pan 31 at one corner of the drain pan 31 through a water receiving bottom surface 36 below the bottom of the outdoor heat exchanger 15. The drain hole 33 collects water collected in the drain pan 31 for the purpose of concentrated drainage, and therefore the shape thereof is not limited to an ellipse. The place where the drain hole 33 is formed is not limited to one corner of the drain pan 31.

For example, in the drain hole 33, one drain hole 33 is formed between two corner portions shown in FIG. 3A and two drain holes 33 in the corner portion. When the outdoor unit 3 is suspended from the apartment room such as a condominium, the drain hose is connected to one drain hole 33 and the other drain hole 33 is closed.
The drain pan 31 is formed using, for example, a thin galvanized steel sheet, but is not limited thereto.

  The heater 32 is a tubular heater such as a sheathed heater, for example, and is formed by bending one heater into a flat shape. Specifically, as shown in FIG. 3A, the heater 32 includes an annular portion 37 bent into a substantially rectangular annular shape, a parallel portion 38 in which one end side and the other end side are arranged in parallel on a straight line, and the like. The

  Here, the heater 32 is formed by being bent into a flat shape in order to improve the adhesiveness with the bottom surface 35 that is the extending surface of the drain pan 31, and the heater 32 is bent to a predetermined shape. This is because the entire bottom surface 35 of the drain pan 31 is uniformly heated by the heater 32 while being in contact with a wide range. Therefore, the bent shape of the heater 32 is not limited to the shape illustrated in the present embodiment.

A part of the annular portion 37 of the heater 32 is fixed by a downward recess 40 of the fixture 34, and the heat conduction flat portion 41 of the fixture 34 is a drain pan 31 provided below the bottom of the outdoor heat exchanger 15. The fixture 34 is attached to the bottom surface 35 of the drain pan 31 with screws 42 in close contact with or in contact with the water receiving bottom surface 36.
The position where the heater 32 is fixed by the fixing tool 34 is not particularly limited.

The shape of the fixture 34 will be described with reference to FIG.
The fixture 34 is manufactured by appropriately pressing and bending a plate material such as a thin steel plate subjected to rust prevention.
The fixture 34 has a fixed flat portion 39 in which the screw hole 34c1 is drilled, a downward concave portion 40 formed in the vicinity of the center where the heater 32 is attached, and heat conduction that transfers heat of the heater 32 to the molten water, the drain pan 31, and the like. A flat portion 41.

  The fixture 34 is formed by bending the downward concave portion 40 by bending the central side of the fixed flat portion 39 at one end thereof into a cross-sectional R shape having a curvature radius substantially the same as the outer shape of the heater 32 opening downward. Form. And the water receiving bottom surface of the drain pan 31 provided below the bottom of the outdoor heat exchanger 15 is the heat conduction flat surface portion 41 where the concave portion 40 of the fixture 34 is bent at right angles to the longitudinal direction (X direction) of the drain pan 31. 36 (see FIG. 3 (b)) is formed into a shape that is in close contact with or in contact with.

Such a fixture 34 is usually formed by pressing as described above, but the bending procedure is not limited to the above example.
Specifically, the downward inner peripheral surface 40a of the recess 40 of the fixing tool 34 surrounds the outer peripheral surface of the heater 32. For example, the heater 32 is in close contact with the heater 32 along the outer peripheral surface of the heater 32. It is formed with a curvature radius substantially the same as the outer shape. The lower surface 41a of the heat conduction flat surface portion 41 of the fixture 34 is formed so as to be in close contact with or in contact with the water receiving bottom surface 36 of the drain pan 31 provided below the bottom of the outdoor heat exchanger 15.

  When fixing the annular portion 37 of the heater 32 to the bottom surface 35 of the drain pan 31 with the fixing tool 34 described above, the inner peripheral surface 40a of the downward concave portion 40 near the center of the fixing tool 34 is covered from above the heater 32, and The heat conduction flat portion 41 on one end side in the longitudinal direction of the fixture 34 (the X direction side in FIGS. 3A and 3B) is placed on the water receiving bottom surface 36 of the drain pan 31 below the bottom of the outdoor heat exchanger 15. The fixed flat surface portion 39 of the flat portion extending to the other end side is disposed on the bottom surface 35 of the drain pan 31 inside the annular portion 27 of the heater 32, and the screw 42 is disposed on the bottom surface 35 of the drain pan 31. The screw is fastened to a female screw threaded into the bottom surface 35 through the screw hole 35a.

Next, the operation of the drain pan structure that receives and flows molten water around the outdoor heat exchanger 15 configured as described above will be described.
The heat of the heater 32 fixed by the recessed portion 40 of the fixing tool 34 is obtained by attaching a part of the heat conduction flat surface portion 41 of the fixing device 34 in close contact with or in contact with the water receiving bottom surface 36 of the drain pan 31. Is transmitted (conducted) from the heat conduction plane 41 to Then, the heat of the heater 32 is transmitted from the heat conduction flat surface portion 41 of the fixture 34 to the water receiving bottom surface 36 of the drain pan 31. Thereby, it is possible to prevent the molten water dropped on the water receiving bottom surface 36 from being heated and frozen by the heat transmitted to the water receiving bottom surface 36.

Thereby, the distance between the bottom part of the outdoor heat exchanger 15 and the water receiving bottom face 36 of the drain pan 31 provided therebelow is short, and the part where the dimension capable of installing the heater 32 is not secured is also heated by the heater 32. The heat conduction flat surface portion 41 on one end side of the fixture 34 is formed below the outdoor heat exchanger 15 by making the shape along the water receiving bottom surface 36 of the drain pan 31 provided below the outdoor heat exchanger 15. The portion of the water receiving bottom surface 36 of the drain pan 31 is warmed.
Therefore, re-freezing of the molten water frosted on the outdoor heat exchanger 15 can be suppressed.

  In addition, when the heat conduction flat surface portion 41 on one end side of the fixture 34 provided below the outdoor heat exchanger 15 is likely to rise to a temperature at which there is a risk of being burned, the outdoor heat exchanger 15 is In consideration of being suspended from a veranda of an apartment house such as a condominium, it is preferable that the child does not touch when the fingertip is inserted into the drain hole 33.

  In addition, when the shape of the water receiving bottom surface 36 of the drain pan 31 provided below the bottom of the outdoor heat exchanger 15 is complicated and it is difficult to form a shape following the water receiving bottom surface 36, the drain pan 31 is located below the heat exchanger. The heat conduction flat portion 41 on one end side of the provided fixture 34 may have a shape close to a plane.

  As explained above, according to the outdoor unit 3 of the air conditioner 1 of the first embodiment, a part of the fixture 34 (the heat conduction flat portion 41) is provided below the bottom of the outdoor heat exchanger 15. By being provided in close contact with or in contact with the water receiving bottom surface 36 of the drain pan 31, re-freezing of the molten water can be suppressed even at a location where the dimension capable of installing the tubular heater 32 is not secured. The reliability and performance of the air conditioner can be improved.

<< Second Embodiment >>
FIG. 4 is an example of a shape showing the fixture 43 with improved drainage efficiency according to the second embodiment. FIG. 4A shows a state in which the fixture 43 is attached to the drain pan 31, and FIG. 4B shows the fixture 43. FIG.
In the second embodiment, the heat conduction flat surface portion 51 on one end side of the fixture 43 is not in the shape of being in close contact with or in contact with the water receiving bottom surface 36 of the drain pan 31 provided below the bottom of the outdoor heat exchanger 15, but the drainage efficiency This is a case where the shape is improved.
In addition, since it is the same as that of 1st Embodiment except the heat conduction flat part 51 of the one end side of the fixing tool 43, it attaches | subjects and shows the same code | symbol, and abbreviate | omits detailed description.

  As shown in FIG. 4 (a), a drain pan provided on one end side in the longitudinal direction (X direction) of the fixture 43 heated by the heater 32 is provided below the bottom of the outdoor heat exchanger 15. By making the shape along the water receiving bottom surface 36 of 31, the molten water frosted on the outdoor heat exchanger 15 falls on the fixture 43. Therefore, in the second embodiment, the shape of the portion where the molten water falls is a shape that improves drainage efficiency, for example, a plurality of flow paths 51r whose lateral cross section protrudes downward toward the vicinity of the drain hole 33 of the drain pan 31. The existing shape is used (see FIG. 4).

Thereby, the melted water that has dropped onto the heat conduction flat portion 51 of the fixture 43 is guided to the drain hole 33 through the plurality of flow paths 51r, and the drainage efficiency through the drain hole 33 is improved.
Therefore, re-freezing of the molten water frosted on the outdoor heat exchanger 15 can be suppressed and drained smoothly from the drain hole 33, and the reliability of the air conditioner 1 can be improved.

As described above, according to the outdoor unit 3 of the air conditioner 1 of the second embodiment, the fixture provided along the water receiving bottom surface 36 of the drain pan 31 provided below the bottom of the outdoor heat exchanger 15. A part of 43 (heat conduction flat part 51) has a guide shape that improves the drainage of the molten water.
As a result, re-freezing of the molten water is suppressed even at a location where the dimension capable of installing the tubular heater 32 is not secured, drainage is performed well, and the reliability and performance of the air conditioner 1 can be improved. it can.

<< Third Embodiment >>
FIG. 5 is an example showing the heat conduction flat portion 61 on one end side of the fixture 44 that is not easily affected by the heat of the drain pan 31 of the third embodiment.
In the third embodiment, the heat conducting flat surface portion 61 on one end side of the fixture 44 is disposed between the bottom portion of the outdoor heat exchanger 15 and the water receiving bottom surface 36 of the drain pan 31 provided therebelow. It is a case where it provided without contacting.
In addition, since it is the same as that of 1st Embodiment except the heat conduction flat part 61 of the one end side of the fixing tool 44, it attaches | subjects and shows the same code | symbol, and abbreviate | omits detailed description.

The drain pan 31 serves as a base for the outdoor unit 3 and is a member having a large area. Therefore, the heat capacity of the drain pan 31 is large, and the amount of heat radiated from the drain pan 31 is large.
Therefore, in the third embodiment, the heat conduction flat surface portion 61 on one end side of the fixture 44 is disposed between the bottom portion of the outdoor heat exchanger 15 and the water receiving bottom surface 36 of the drain pan 31 provided therebelow. The water receiving bottom surface 36 is provided without contacting.

In this way, the heat conduction flat surface portion 61 of the fixture 44 and the drain pan 31 are not brought into contact with each other, so that the heat absorption of the drain pan 31 that has been cooled as the outside air temperature decreases is less likely to be affected.
Therefore, the temperature drop of the fixture 44 heated by the heater 32 is suppressed, and refreezing of the molten water is suppressed.

  Alternatively, the heat conduction flat surface portion 61 of the fixture 44 provided between the bottom portion of the outdoor heat exchanger 15 and the water receiving bottom surface 36 of the drain pan 31 provided below the drain pan 31 is shaped so as not to be affected by the heat of the drain pan 31. You may make it the shape which contacts or fixes to 31. For example, the contact area (heat transfer area) of the heat conduction flat surface portion 61 of the fixture 44 to the drain pan 31 is reduced and brought into contact with the water receiving bottom surface 36 of the drain pan 31.

  Alternatively, between the heat conduction flat surface portion 61 of the fixture 44 and the water receiving bottom surface 36 of the drain pan 31 provided between the bottom of the outdoor heat exchanger 15 and the water receiving bottom surface 36 of the drain pan 31 provided therebelow, A heat insulating material (for example, a heat insulating material having closed cells) may be provided.

  As explained above, according to the outdoor unit 3 of the air conditioner 1 of the third embodiment, the heat conduction flat surface part 61 of a part of the fixture 44 is provided at the bottom of the outdoor heat exchanger 15 and below it. Since the drain pan 31 is provided between the drain receiving base 31 and the water receiving bottom 36 without contacting the water receiving bottom 36, the drain pan 31 receives heat absorption even at a location where the installation size of the tubular heater 32 is not secured. The re-freezing of the molten water frosted on the outdoor heat exchanger 15 can be suppressed, and the reliability and performance of the air conditioner 1 can be improved.

<< Fourth Embodiment >>
In FIG. 6, the heat conductive flat part 71 of the fixing tool 45 of 4th Embodiment is shown. FIG. 6A shows a state in which the fixture 45 is attached to the drain pan 31, and FIG. 6B shows a perspective view of the fixture 45.
4th Embodiment not only provides the heat conduction plane part 71 of the one end side of the fixing tool 45 between the bottom part of the outdoor heat exchanger 15, and the water receiving bottom face 36 of the drain pan 31 provided in the downward direction, It is shaped to receive molten water.
In addition, since it is the same as that of 1st Embodiment except the heat conduction plane part 71 of the one end side of the fixing tool 45, it attaches | subjects and shows the same code | symbol, and abbreviate | omits detailed description.

As described in the previous third embodiment, since the drain pan 31 has a large area, it is considered that the heat capacity of the drain pan 31 is large and the amount of heat radiated from the drain pan 31 is large.
As shown in FIG. 6 (a), a heat conduction flat portion 71 on one end side of the fixture 45 provided between the bottom portion of the outdoor heat exchanger 15 and the water receiving bottom surface 36 of the drain pan 31 provided therebelow is provided. The outdoor heat exchanger 15 has a tray shape that receives and accumulates frosted molten water.

As shown in FIG. 6 (b), the fixture 45 is formed by drawing a heat conduction flat part 71 disposed below the outdoor heat exchanger 15 into a storage flat part 71c and a storage flat part 71c that receive molten water. It has a dish shape having a bank portion 71d formed upward from the storage flat surface portion 71c.
Therefore, the molten water that has formed frost around the outdoor heat exchanger 15 falls and accumulates on the heat conduction flat part 71 of the tray of the fixture 45, is heated by the heat of the heater 32, overflows, and receives the bottom surface 36 of the drain pan 31. Fall into. Thereby, the influence of the heat absorption of the drain pan 31 is reduced as much as possible, and the molten water can be drained from the drain hole 33.

  According to the outdoor unit 3 of the air conditioner 1 of the fourth embodiment, the heat conduction plane portion 71 of the fixture 45 is formed in a dish shape, so that the molten water that has formed frost around the outdoor heat exchanger 15 is heat conduction plane. It is stored in the section 71 and is prevented from dropping to the water receiving bottom surface 36 of the drain pan 31 provided below the bottom of the outdoor heat exchanger 15 as much as possible. Thereby, also about the location where the dimension which can install the tubular heater 32 is not ensured, the influence of the heat absorption of the drain pan 31 can further be reduced, and re-freezing of molten water can be suppressed and drained.

  As described above, according to the first to fourth embodiments, the heater 32 has a shape that follows the outer peripheral shape of the bottom of the outdoor heat exchanger 15, or substantially the same size as the outer peripheral shape of the outdoor heat exchanger 15. The outdoor unit of the air conditioner 1 in which the re-freezing of the melted water is suppressed and the reliability and performance are improved even at a location where the dimension capable of installing the heater 32 is not secured, such as being unable to install the shape of 3 can be provided.

  In each of the above embodiments, the steel plate fixture 34 is exemplified as the fixing member. However, the strength for fixing the heater 32 and the thermal conductivity for conducting the heat of the heater 32 to the heat conduction flat portion 41 are good. If it is a thing, you may use things other than a steel plate as a fixing member. Steel plates are more desirable because they are inexpensive and have good thermal conductivity, good workability, and high strength.

  In each of the above embodiments, the tubular heater 32 is exemplified as the heating member. However, the tubular heater 32 is not limited to the tubular heater 32 as long as it is fixed to the drain pan 31 by being in close contact with or in contact with the fixture 34. A heating member may be used.

DESCRIPTION OF SYMBOLS 1 Air conditioner 3 Outdoor unit 15 Outdoor heat exchanger 31 Drain pan 32 Heater (heating member)
33 Drain hole 34, 43, 44, 45 Fixing tool (fixing member)
35 Bottom (extended surface)
36 Water receiving bottom (drain pan location)
37 Annular part (part of heating element)
39 Fixed plane part (fixing member)
40 recess (fixing member)
41, 51, 61 Heat conduction plane (heat transfer part)
51r channel 71 heat conduction plane part (heat transfer part)
71c Reservoir plane part (basin shape)
71d Bank part (sink shape)

Claims (6)

A drain pan provided below the outdoor heat exchanger and provided with a drain hole for draining the frosted water frosted on the outdoor heat exchanger, a heating member provided along the extended surface of the drain pan, and the heating A fixing member that fixes the heating member to the extending surface by contacting a part of the member;
The fixing member is provided in close contact with or in contact with the drain pan located below the bottom of the outdoor heat exchanger, and has a heat transfer portion to which heat of the heating member is transmitted. Air conditioner outdoor unit. In the outdoor unit of the air conditioner according to claim 1,
The outdoor unit of an air conditioner, wherein the heat transfer portion of the fixing member has a guide shape that promotes drainage of the molten water from the drain hole. In the outdoor unit of the air conditioner according to claim 2,
The outdoor shape unit for an air conditioner, wherein the guide shape is a shape in which a plurality of flow paths for guiding the molten water to the drain hole are formed. A drain pan provided below the outdoor heat exchanger and provided with a drain hole for draining the frosted water frosted on the outdoor heat exchanger, a heating member provided along the extended surface of the drain pan, and the heating A fixing member that fixes the heating member to the extending surface by contacting a part of the member;
The fixing member includes a heat transfer portion that is provided between a bottom portion of the outdoor heat exchanger and a portion of the drain pan located below the outdoor heat exchanger and to which heat of the heating member is transmitted. The outdoor unit of the machine. In the outdoor unit of the air conditioner according to claim 4,
The outdoor unit of an air conditioner, wherein the heat transfer portion of the fixing member is provided without contacting the drain pan between a bottom portion of the outdoor heat exchanger and a portion of the drain pan located below the heat exchanger. In the outdoor unit of the air conditioner according to claim 4 or 5,
The outdoor unit of an air conditioner, wherein the heat transfer part of the fixing member has a tray shape that receives and accumulates the molten water.

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