JP2015090262A - Outdoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit of an air conditioner that restrains freezing of water vapor attached to a fan motor support plate and a bell mouth.SOLUTION: An outdoor unit of an air conditioner comprises a back heater 30a provided on a fan motor support plate 24 or around the fan motor support plate 24, a side heater 30b provided in an air blower room 20 so as to extend in a vertical direction, and a front heater 30c provided along at least a portion of the outer periphery of a bell mouth 27.

Description

  The present invention relates to an outdoor unit of an air conditioner.

  In a heat pump air conditioner, heat exchange may be inhibited by frosting (frosting) the outdoor heat exchanger during heating operation in which the outdoor heat exchanger serves as an evaporator. For this reason, the heat pump type air conditioner which implements the defrost operation which removes frost when frost formation is detected is proposed conventionally.

  When the defrosting operation is performed, the frost that has been frosted on the outdoor heat exchanger melts into drain water and water vapor. The drain water generated by performing the defrosting operation drops on the upper surface of the bottom panel that constitutes the bottom surface of the outdoor unit housing, and then passes through the drain discharge hole formed in the bottom panel. Is discharged. Further, the water vapor generated by performing the defrost operation is discharged to the outside of the outdoor unit by natural convection or when the fan rotates during the heating operation after the completion of the defrost operation.

  Especially in cold districts where the outside air temperature is low, it is easy to form frost, and before drain water dripped from the outdoor heat exchanger to the top surface of the bottom panel is discharged outside the outdoor unit through the drain discharge hole. In addition, there is a case where it freezes again on the upper surface of the bottom panel. For this reason, conventionally, in order to prevent drain water from refreezing on the upper surface of the bottom panel, there has been an outdoor unit in which a heater (seeds heater) is laid on the upper surface of the bottom panel (for example, Patent Document 1).

Japanese Patent Laying-Open No. 2011-52941 (Page 10, FIGS. 1 and 2)

  With the widespread use of heat pump air conditioners, outdoor units may be installed in extremely cold regions (outside air temperature is 0 ° C. or lower) in addition to conventional cold regions. In an extremely cold region, the surface temperature of the outdoor heat exchanger and the casing is 0 ° C. or less, similar to the outside air temperature. For this reason, the water vapor generated during the defrosting operation may stay inside the casing and refreeze in the casing itself. In addition, the ice generated by freezing water vapor does not melt in the defrost operation, and grows repeatedly by refreezing each time the defrost operation is repeated, and may become an icicle. Here, since the heater described in Patent Document 1 is laid on the upper surface of the bottom panel, there is a problem that it is not possible to sufficiently suppress freezing of water vapor attached to members other than the bottom panel.

  In particular, water vapor may adhere to the fan motor support plate that supports the fan motor, and the water vapor attached to the fan motor support plate may freeze. In addition, on the outer periphery of the bell mouth, there is little air flow during fan operation, air stagnation occurs, water vapor generated during defrost operation tends to stay, and frozen ice grows on the bell mouth itself. easy. In such a case, the ice generated by freezing water vapor attached to the fan motor support plate and the bell mouth contacts the propeller fan disposed inside the outdoor unit and causes the propeller fan to be lost, or the propeller fan There has been a problem that the propeller fan may be broken by applying a load to the fan motor that drives the motor.

  The present invention has been made against the background of the above-described problems, and an object of the present invention is to provide an outdoor unit that suppresses freezing of water vapor attached to the fan motor support plate and the bell mouth.

  The outdoor unit of the air conditioner of the present invention is provided with a housing having a front panel formed with an opening, a fan provided in a blower chamber formed inside the housing, and the blower chamber, A fan motor that drives the fan, an outdoor heat exchanger provided in the blower chamber, a fan motor support plate that is provided in the blower chamber and on the front side of the outdoor heat exchanger and supports the fan motor A bell mouth that is provided in the blower chamber and projects rearward from a peripheral edge of the opening; a first heater provided in the periphery of the fan motor support plate or the fan motor support plate; A second heater provided so as to extend in a direction, and a third heater provided along at least a part of the outer periphery of the bell mouth.

  According to the present invention, the fan motor support plate or the first heater provided around the fan motor support plate, the second heater provided in the blower chamber so as to extend in the vertical direction, and at least one of the outer circumferences of the bell mouth. A third heater provided along the portion. For this reason, even if water vapor adheres to the fan motor support plate and the bell mouth during the defrost operation, the heater generates heat, so that the water vapor attached to the fan motor support plate and the bell mouth becomes 0 ° C. or higher. Therefore, freezing of water vapor adhering to the fan motor support plate and the bell mouth can be suppressed in a cryogenic environment at an outside air temperature of 0 ° C. or less.

It is a perspective view of the outdoor unit 100 of the air conditioner according to the embodiment. It is a disassembled perspective view of the outdoor unit 100 of the air conditioner according to the embodiment. It is the disassembled perspective view of the outdoor unit 100 of the air conditioner which concerns on embodiment, and is the figure which showed FIG. 2 in detail. It is XX sectional drawing of FIG. It is YY sectional drawing of FIG. It is a figure which shows the internal structure of the outdoor unit 100 of the air conditioner which concerns on embodiment. It is the figure which provided the heater 30 in the inside of the outdoor unit 100 of the air conditioner which concerns on embodiment. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1, and is a view in which a heater 30 is provided inside the outdoor unit 100. FIG. 2 is a cross-sectional view taken along line YY in FIG. 1, and is a view in which a heater 30 is provided inside the outdoor unit 100. It is the figure which provided the back heater 30a different from FIG. 7 in the inside of the outdoor unit 100 of the air conditioner which concerns on embodiment. It is the figure which provided the side heater 30b different from FIG. 7 in the inside of the outdoor unit 100 of the air conditioner which concerns on embodiment. It is the figure which provided the side heater 30b different from FIG. 7 in the inside of the outdoor unit 100 of the air conditioner which concerns on embodiment. It is the figure which provided the side heater 30b different from FIG. 7 in the inside of the outdoor unit 100 of the air conditioner which concerns on embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one. Further, in the following drawings including FIG. 1, the same reference numerals denote the same or equivalent parts, and this is common throughout the entire specification. Furthermore, the forms of the constituent elements shown in the entire specification are merely examples, and are not limited to these descriptions.

  FIG. 1 is a perspective view of an outdoor unit 100 for an air conditioner according to an embodiment. FIG. 2 is an exploded perspective view of the outdoor unit 100 of the air conditioner according to the embodiment. FIG. 3 is an exploded perspective view of the outdoor unit 100 of the air conditioner according to the embodiment, and shows FIG. 2 in detail.

  As shown in FIG. 1, the outer shell of the outdoor unit 100 is configured by a housing 50. As shown in FIG. 2, the housing 50 includes a front side panel 50a, a right side panel 50b, a bottom panel 50c, a top panel 50d, and a back panel 50e (FIG. 4). The front side panel 50a constitutes the front side and the left side of the housing 50, and is constituted by, for example, a member having an L shape in plan view. Further, as shown in FIG. 2, a partition plate 1 is provided inside the housing 50. By providing the partition plate 1, the inside of the housing 50 is partitioned into the machine room 10 and the blower room 20.

  In the front side panel 50a, the portion constituting the front surface portion of the housing 50 and the portion constituting the left side surface portion of the housing 50 may be configured as separate parts. That is, the front side panel 50 a may be divided into a front panel that constitutes the front surface portion of the housing 50 and a left side panel that constitutes the left side surface portion of the housing 50.

  The machine room 10 is provided with a compressor 11 and an electrical component box 12. A control board (not shown) is provided inside the electrical component box 12. A control board (not shown) is a member for controlling the rotation speed of the compressor 11 and driving a heater 30 and the like which will be described later. The control board (not shown) is configured by, for example, hardware such as a circuit device that realizes this function, or software executed on an arithmetic device such as a microcomputer or a CPU.

  The blower chamber 20 is provided with an outdoor heat exchanger 21, a fan 22, a fan motor 23 (FIG. 4), a fan motor support plate 24, an upper plate 25, and a support plate connection portion 26. The outdoor heat exchanger 21 is provided on the back side of the outdoor unit 100 with respect to the fan 22, the fan motor 23, the fan motor support plate 24, the upper plate 25, and the support plate connection portion 26.

  The outdoor heat exchanger 21 has, for example, an L shape in plan view, and is provided along the left side surface of the front side panel 50a and the back panel 50e. The fan 22 is a blower unit composed of, for example, a propeller fan, and generates an air circulation for efficiently performing heat exchange. The fan 22 has a function of introducing outside air into the outdoor unit 100 from the back side of the outdoor unit 100 and discharging the outside air introduced into the outdoor unit 100 toward the front side of the outdoor unit 100.

  The fan motor 23 is a driving unit that drives the fan 22 and is attached to the fan motor support plate 24 using a fixing unit such as a screw. The fan motor support plate 24 is for supporting the fan motor 23, and is a frame-shaped member that extends upward from the bottom panel 50c. In addition, the fan motor support plate 24 may be provided with two or more as shown in the figure.

  The upper plate 25 is a plate-like member provided substantially horizontally with the bottom panel 50c, for example. The upper plate 25 is a member for reinforcing the strength of the fan motor support plate 24 in consideration of the case where the fan motor 23 is enlarged, and is connected to the fan motor support plate 24. The upper plate 25 is attached, for example, from the uppermost end of the fan motor support plate 24 toward the front.

  The support plate connecting portion 26 is, for example, a U-shaped member, and is configured integrally with the fan motor support plate 24. The support plate connection portion 26 is provided such that the inner surface thereof is in contact with the upper surface of the outdoor heat exchanger 21. Thus, the fan motor support plate 24 is fixed to the outdoor heat exchanger 21 by attaching the support plate connecting portion 26 to the outdoor heat exchanger 21.

  As shown in FIG. 3, an opening 50a1 is formed in the front side panel 50a. The opening 50 a 1 is an opening for discharging outside air introduced into the outdoor unit 100 to the outside of the outdoor unit 100. Further, a bell mouth 27 is provided so as to surround the outer periphery of the fan 22 on the back side of the front side panel 50a.

  The bell mouth 27 has, for example, a reduced diameter portion 27a projecting rearward from the periphery of the opening 50a1 so as to reduce the diameter inward in the radial direction, and a diameter increasing from the rear end of the reduced diameter portion 27a toward the radially outer side. And an enlarged diameter portion 27b projecting rearward. The bell mouth 27 is formed integrally with the front side panel 50a. The bell mouth 27 has a function of guiding the outside air introduced into the housing 50 to the opening 50a1. In addition, you may comprise the bellmouth 27 so that it may have the site | part extended in the front-back direction between the reduced diameter part 27a and the enlarged diameter part 27b.

  4 is a sectional view taken along line XX in FIG. 5 is a cross-sectional view taken along line YY of FIG. 4 and 5, the air flow is schematically shown as an air flow A by arrows. Hereinafter, the air path formed inside and outside the housing 50 will be described with reference to FIGS. 4 and 5.

  When the fan motor 23 is driven, the fan 22 rotates and the outside air is introduced into the housing 50. The outside air introduced into the housing 50 is blown onto a member such as the bell mouth 27 through the outdoor heat exchanger 21. The outside air circulated through the housing 50 in this manner is discharged outside the housing 50 through the opening 50a1. Note that air stagnation A1 tends to occur on the outer periphery of the bell mouth 27 as shown in the figure.

  FIG. 6 is a diagram showing an internal structure of the outdoor unit 100 of the air conditioner according to the embodiment. FIG. 7 is a diagram in which a heater 30 is provided inside the outdoor unit 100 of the air conditioner according to the embodiment. FIG. 8 is a cross-sectional view taken along the line XX in FIG. 1, and is a view in which a heater 30 is provided inside the outdoor unit 100. FIG. 9 is a cross-sectional view taken along line YY of FIG. 1, and is a view in which a heater 30 is provided inside the outdoor unit 100.

  As shown in FIG. 6, the fan motor support plate 24 includes an upper part 24a, a body part 24b, and a lower part 24c. A barrel portion 24b is located below the upper portion 24a, and a lower portion 24c is located below the barrel portion 24b. The upper part 24 a is a part connected to the support plate connecting part 26. The body part 24b is a part to which the fan motor 23 is attached. The lower part 24c is a part fixed to the bottom panel 50c by fixing means such as screws (not shown).

  The upper part 24a is configured by a rectangular frame-shaped member having a hollow part 24a1, for example. The lower portion 24c is configured by a rectangular frame-shaped member having a hollow portion 24c1, for example. Since the cavities 24a1 and 24c1 are thus formed, a part of the air flow A blown out to the fan motor support plate 24 passes through the cavities 24a1 and 24c1 and is discharged to the front side of the housing 50. Is done. That is, the obstruction of the air flow A can be suppressed by forming the hollow portions 24a1 and 24c1.

  As shown in FIG. 7, the heater 30 is provided inside the housing 50. The heater 30 is a heating means constituted by, for example, a sheathed heater, and heats water vapor generated inside the housing 50. A nichrome wire is provided inside the heater 30. In addition, you may comprise the heater 30 with a flexible (flexible) heater. If comprised in this way, it will become easy to arrange | position the heater 30 in the housing | casing 50. FIG.

  The heater 30 is used with, for example, a power consumption of 100 W and a temperature of 30 ° C., for example. Energization of the heater 30 is started at the time of heating operation and when an outside air temperature sensor (not shown) is equal to or lower than a predetermined temperature. Note that the power consumption and temperature of the heater 30 are not limited to the above-described values, and are appropriately determined so that water vapor generated inside the housing 50 is heated.

  The heater 30 includes a back heater 30a, a side heater 30b, a front heater 30c, and a bottom heater 30d. Hereinafter, the configuration of the heater 30 will be described. The back heater 30a, the side heater 30b, the front heater 30c, and the bottom heater 30d are integrally provided.

  The back heater 30a is attached to the fan motor support plate 24 by using fixing means such as screws. The back heater 30a is folded back at the top of the fan motor support plate 24 and is provided so as to have a downward U-shape when viewed from the front. An upper plate 25 connected to the fan motor support plate 24 is provided above the fan motor support plate 24. The rear heater 30a is provided around the lower portion of the fan motor support plate 24 on the upper surface of the bottom panel 50c.

  The side heater 30b includes a portion extending in the front-rear direction provided along the left side surface of the front side panel 50a in the outdoor heat exchanger 21, and a reduced diameter portion facing the left side surface of the front side panel 50a in the bell mouth 27. 27a and the rear end. The side heater 30b is folded back in the vicinity of the heater support member 28, has a downward U shape when viewed from the side, and is positioned around the outdoor heat exchanger 21. As shown in FIG. 8, the lateral cross section of the side heater 30b is circular.

  The front heater 30c is provided in an arc shape along the outer periphery of the bell mouth 27, for example, over 180 degrees. The front heater 30 c is connected to the bottom heater 30 d below the inside of the housing 50. As shown in FIG. 9, the front heater 30c has a circular cross section.

  The front heater 30c is provided along the outer periphery of the reduced diameter portion 27a and the enlarged diameter portion 27b. Specifically, the front heater 30c is provided on the outer periphery of a portion of the bell mouth 27 having the smallest outer diameter. In addition, it is not limited to the example provided along the outer periphery of the reduced diameter part 27a and the enlarged diameter part 27b, For example, you may provide along the outer periphery of the reduced diameter part 27a or the enlarged diameter part 27b.

  In addition, although the front heater 30c demonstrated the example provided in circular arc shape over the outer periphery of the bellmouth 27, for example, 180 degree | times or more, a specific angle is not limited to this. It is sufficient that the upper limit angle is 360 degrees and the bell mouth 27 is configured to be along at least a part of the outer periphery.

  Further, when the front heater 30 c is provided over 360 degrees along the outer periphery of the bell mouth 27, it is desirable that the outer diameter of the front heater 30 c be larger than the maximum outer diameter of the bell mouth 27. When the outer diameter of the front heater 30c is smaller than the maximum outer diameter of the bell mouth 27, the front heater 30c is arranged along at least a part of the outer periphery of at least one of the reduced diameter portion 27a and the enlarged diameter portion 27b. This is because the water vapor cannot be disposed and the freezing of water vapor attached to the bell mouth 27 cannot be effectively suppressed.

  The bottom heater 30d is provided on the top surface of the bottom panel 50c so as to extend in the left-right direction. Specifically, for example, the bottom heater 30d is provided on the front side of the top surface of the bottom panel 50c with respect to the rear end of the bell mouth 27 in a plan view. If comprised in this way, freezing of the water vapor | steam adhering to the bellmouth 27 can be suppressed, and freezing of the drain water which flowed out from the outdoor heat exchanger 21 can be suppressed.

  Next, the operation of the outdoor unit 100 in an extremely cold area where the outside air temperature is 0 ° C. or less will be described. The above-described control board (not shown) controls the operation of the outdoor unit 100 when, for example, a user or the like receives an operation of an operation unit (not shown) for setting the operation mode. The operation mode includes, for example, a heating operation and a cooling operation. Here, the following description will be made on the assumption that the heating operation is set.

  Since the fan 22 rotates when the heating operation is set, the outside air is introduced into the housing 50 as described above. Here, since the outdoor heat exchanger 21 has a function as an evaporator, the outside air introduced into the housing 50 is heat-exchanged with the refrigerant inside the outdoor heat exchanger 21, and the temperature decreases. The outside air whose temperature has decreased is blown to members such as the fan motor support plate 24 and the bell mouth 27 in the blower chamber 10. When the outside air temperature detected by the outside air temperature sensor becomes equal to or lower than the predetermined temperature, the control board starts energizing the heater 30. By starting energization of the heater 30 in this way, the heat of the heater 30 is transmitted to the fan motor support plate 24 and the bell mouth 27, and frost formation on the fan motor support plate 24 and the bell mouth 27 is suppressed.

  The control board stops the operation of the compressor 11 after the heating operation is performed for a certain time, and switches the four-way valve (not shown) to the cooling side. Then, the control board restarts the operation of the compressor 11 and stops the rotation of the fan 22. Thus, the defrost operation is started.

  During the defrost operation, since the outdoor heat exchanger 21 has a function as a condenser, the refrigerant discharged from the compressor 11 flows into the outdoor heat exchanger 21, and the outdoor heat exchanger 21 is heated. For this reason, the temperature inside the housing | casing 50 can be raised using the heat | fever in the outdoor heat exchanger 21 by performing a defrost driving | operation.

  By performing the defrost operation, the temperature of the frost adhering to the fan motor support plate 24 and the bell mouth 27 rises to become water vapor, and this water vapor tries to refreeze in an extremely cold region where the outside air temperature is 0 ° C. or less. . However, the heater 30 provided on the fan motor support plate 24 and the bell mouth 27 heats the water vapor adhering to the fan motor support plate 24 and the bell mouth 27. For this reason, refreezing of water vapor adhering to the fan motor support plate 24 and the bell mouth 27 can be suppressed.

  Note that the back heater 30 a is not limited to being provided on the fan motor support plate 24, and may be configured to be provided around the fan motor support plate 24. Even if comprised in this way, the heat | fever emitted from the back heater 30a can be transmitted to the fan motor support plate 24 similarly to the case where the back heater 30a is attached to the fan motor support plate 24.

  At this time, the back heater 30a may be provided along the fan motor support plate 24. However, since a wiring is provided in the vicinity of the fan motor support plate 24, the wiring and the back heater 30a are not in contact as much as possible. Thus, it is more preferable to provide the back heater 30a.

  Further, the back heater 30a may be extended in the vertical direction while being bent in the horizontal direction, for example, without being linearly extended in the vertical direction as illustrated. If comprised in this way, since the surface area of the back heater 30a which discharge | releases heat toward the fan motor support plate 24 increases, freezing of the water vapor | steam adhering to the bottom panel 50c can be suppressed further.

  Further, the back heater 30a may be folded up and down a plurality of times along the fan motor support plate 24. If comprised in this way, freezing of water vapor | steam can be suppressed further.

  Further, since the compressor 11 in the machine room 10 rotates during the operation of the outdoor unit 100, the temperature on the right side (machine room 10 side) of the blower room 20 in the blower room 20 is the temperature on the left side of the blower room 20. Higher than. In consideration of such circumstances, the left side of the fan motor support plate 24 may be heated more than the right side of the fan motor support plate 24.

  Further, at least one of the rear heater 30a, the side heater 30b, and the front heater 30c is a hot gas bypass circuit (not shown) that directly supplies at least a part of the refrigerant discharged from the compressor 11 to the outdoor heat exchanger 21. It may be comprised. Here, a refrigerant having a temperature higher than that of the refrigerant discharged from the compressor 11 and supplied to the outdoor heat exchanger 21 via the indoor heat exchanger (not shown) flows through the hot gas bypass circuit. For this reason, the fan motor support plate 24 or the periphery of the fan motor support plate 24 and the bell mouth 27 can be heated by utilizing the heat of the refrigerant flowing through the hot gas bypass circuit.

As described above, the outdoor unit 100 of the air conditioner according to the present embodiment is provided in the housing 50 having the front panel in which the opening is formed and the blower chamber 20 formed in the housing 50. The fan 22, the fan motor 23 that is provided in the blower chamber 20 and drives the fan 22, the outdoor heat exchanger 21 that is provided in the blower chamber 20, and the front side of the blower chamber 20 and the outdoor heat exchanger 21. A fan motor support plate 24 that supports the fan motor 23, a bell mouth 27 that is provided in the blower chamber 20 and projects rearward from the periphery of the opening 50 a 1, and the fan motor support plate 24 or the fan motor support plate 24. A rear heater 30a provided in the periphery of the fan, a side heater 30b provided in the blower chamber 20 so as to extend in the vertical direction, and at least part of the outer periphery of the bell mouth 27. A front heater 30c was kicked, those having a.
For this reason, even if water vapor adheres to the fan motor support plate 24 and the bell mouth 27 during defrost operation, the heater 30 generates heat, so that the water vapor attached to the fan motor support plate 24 and the bell mouth 27 is 0 ° C. or higher. It becomes. Therefore, freezing of water vapor adhering to the fan motor support plate 24 and the bell mouth 27 can be suppressed in a cryogenic environment at an outside air temperature of 0 ° C. or less.

  Further, since the back heater 30a, the side heater 30b, and the front heater 30c are configured as one body, the productivity is improved as compared with the case where the back heater 30a, the side heater 30b, and the front heater 30c are configured separately. To do.

  FIG. 10 is a view in which a rear heater 30a different from that in FIG. 7 is provided inside the outdoor unit 100 of the air conditioner according to the embodiment. As shown in FIG. 10, a rear heater 30 a may be provided around the upper surface of the upper plate 25. In this way, freezing of water vapor adhering to the upper plate 25 can be suppressed.

  Further, the rear heater 30a may be provided so as to be attached to the upper plate 25 instead of the periphery of the upper surface of the upper plate 25. Even if comprised in this way, the heat | fever of the back heater 30a can be transmitted to the upper board 25 similarly to the case where the back heater 30a is provided in the periphery of the upper surface of the upper board 25.

  Further, a back heater 30 a may be provided on the lower surface of the upper plate 25. If comprised in this way, the freezing of the water vapor | steam adhering to the lower surface of the upper board 25 to which water vapor | steam tends to adhere most among the upper boards 25 can be suppressed further. Further, since it is not necessary to secure a space for providing the rear heater 30a between the upper surface of the upper plate 25 and the lower surface of the top panel 50d, it is possible to save the space of the outdoor unit 100.

  FIG. 11 is a view in which a side heater 30b different from FIG. 7 is provided inside the outdoor unit 100 of the air conditioner according to the embodiment. As shown in FIG. 11, the side heater 30b may be bent a plurality of times to form a plurality of upward U-shapes and downward U-shapes. Further, the side heater 30b may be extended in the vertical direction while being bent in the horizontal direction, for example, without being linearly extended in the vertical direction as illustrated. If comprised in this way, since the surface area of the side heater 30b which discharge | releases heat toward the bellmouth 27 increases, the freezing of the water vapor | steam adhering to the bellmouth 27 can be suppressed further.

  FIG. 12 is a view in which a side heater 30b different from FIG. 7 is provided inside the outdoor unit 100 of the air conditioner according to the embodiment. As shown in FIG. 12, the side heater 30 b may be further provided so as to extend in the left-right direction above the uppermost end of the bell mouth 27. If comprised in this way, the freezing of the water vapor | steam adhering to the bellmouth 27 can be suppressed further.

  FIG. 13 is a view in which a side heater 30b different from FIG. 7 is provided inside the outdoor unit 100 of the air conditioner according to the embodiment. As shown in FIG. 13, the side heater 30 b may be bent near the center of the bell mouth 27 in the vertical direction. If the side heater 30b is configured in this manner, the central portion of the bell mouth 27 in the vertical direction of the bell mouth 27 that is most likely to stagnate can be heated. For this reason, even if it is a case where the installation space of the side heater 30b cannot fully be ensured, freezing of the water vapor | steam adhering to the bellmouth 27 can be suppressed efficiently.

  The back heater 30a corresponds to the first heater in the present invention. The side heater 30b corresponds to the second heater in the present invention. The front heater 30c corresponds to the third heater in the present invention. Further, the bottom heater 30d corresponds to the fourth heater in the present invention.

  DESCRIPTION OF SYMBOLS 1 Partition plate, 10 Machine room, 11 Compressor, 12 Electrical component box, 20 Blower room, 21 Outdoor heat exchanger, 22 Fan, 23 Fan motor, 24 Fan motor support plate, 24a Upper part, 24a1 Cavity part, 24b Body 24c Lower part, 24c1 Cavity part, 25 Upper plate, 26 Support plate connection part, 27 Bell mouth, 27a Reduced diameter part, 27b Expanded part, 28 Heater support member, 30 Heater, 30a Rear heater, 30b Side heater, 30c Front face Heater, 30d bottom heater, 50 housing, 50a front side panel, 50a1 opening, 50b right side panel, 50c bottom panel, 50d top panel, 50e back panel, 100 outdoor unit, A air flow, A1 air stagnation.

Claims (15)

A housing having a front panel with an opening formed therein;
A fan provided in a blower chamber formed inside the housing;
A fan motor provided in the blower chamber and driving the fan;
An outdoor heat exchanger provided in the blower chamber;
A fan motor support plate which is provided in the blower chamber and on the front side of the outdoor heat exchanger and supports the fan motor;
A bell mouth that is provided in the blower chamber and protrudes rearward from the periphery of the opening;
A first heater provided around the fan motor support plate or the fan motor support plate;
A second heater provided in the blower chamber so as to extend in the vertical direction;
An air conditioner outdoor unit, comprising: a third heater provided along at least a part of the outer periphery of the bell mouth. The outdoor unit for an air conditioner according to claim 1, wherein the first heater, the second heater, and the third heater are integrally formed. The said 1st heater is provided so that it may extend in the up-down direction, it may be return | folded by the upper part of the said fan motor support plate, or the upper periphery, and it may become a downward U-shape by front view. Item 3. An air conditioner outdoor unit according to Item 2. An upper plate connected to the fan motor support plate is provided at an upper portion of the fan motor support plate;
The outdoor unit of an air conditioner according to any one of claims 1 to 3, wherein the first heater is further provided around the upper plate or the upper plate. The fan motor support plate is attached to a bottom panel constituting the housing,
The outdoor unit for an air conditioner according to any one of claims 1 to 4, wherein the first heater is further provided on an upper surface of the bottom panel. The air conditioner outdoor unit according to any one of claims 1 to 5, wherein a plurality of the fan motor support plates are provided. The outdoor heat exchanger is provided along a side surface forming the blower chamber among the side surfaces of the housing,
The said 2nd heater was provided in the said outdoor heat exchanger side provided along the side surface which forms the said air blower chamber rather than the said bellmouth. The any one of Claims 1-6 characterized by the above-mentioned. The outdoor unit of the air conditioner described in one item. A compressor,
A partition plate that divides the interior of the housing into a plurality of spaces, and
The air conditioning according to any one of claims 1 to 7, wherein the partition plate is partitioned into a machine room in which the compressor is provided and a blower room. The outdoor unit of the machine. The outdoor unit for an air conditioner according to any one of claims 1 to 8, wherein the second heater is provided so as to have a downward U-shape when viewed from the side. The air conditioner according to any one of claims 1 to 9, wherein the second heater is further provided to extend in the left-right direction above the uppermost end of the bell mouth. Outdoor unit. The third heater is
It was provided over 180 degrees or more along the outer periphery of the bell mouth. The outdoor unit of the air conditioner as described in any one of Claims 1-10 characterized by the above-mentioned. The bell mouth is
A reduced diameter portion projecting rearward so as to reduce the diameter radially inward from the periphery of the opening;
A diameter-expanding portion that projects rearward from the rear end of the diameter-decreasing portion so as to expand radially outward, and
The third heater according to any one of claims 1 to 11, wherein the third heater is provided along at least a part of an outer periphery of at least one of the reduced-diameter portion and the enlarged-diameter portion. Air conditioner outdoor unit. The outdoor unit for an air conditioner according to any one of claims 1 to 12, wherein at least one of the first heater and the second heater is bent a plurality of times. At least one of the first heater, the second heater, and the third heater directly supplies at least a part of the refrigerant discharged from the compressor provided in the housing to the outdoor heat exchanger. The outdoor unit for an air conditioner according to any one of claims 1 to 13, wherein the outdoor unit is configured with hot gas bypass piping. The outdoor unit for an air conditioner according to any one of claims 1 to 14, further comprising a fourth heater provided on an upper surface of a bottom panel constituting the housing.

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