JPWO2019123596A1 - Outdoor unit of refrigeration cycle equipment - Google Patents

Abstract

We propose an outdoor unit of a refrigeration cycle device that can reliably drain drain water generated by defrosting operation by using a flexible heater whose heat generation capacity per unit area is inferior to that of a conventional sheathed heater. The outdoor unit (1) of the refrigeration cycle device is doubly laid on a bottom plate (21) having a drainage port (43) and a flexible and all or part around the drainage port (43). It is provided with a linear heater (46) having a double laying portion (45).

Description

An embodiment of the present invention relates to an outdoor unit of a refrigeration cycle device.

As outdoor units of refrigerating cycle devices that store refrigeration cycle equipment inside and are installed outdoors, there are outdoor units of air conditioners and outdoor units of heat pump type water heaters. An outdoor unit of such a refrigeration cycle device includes a housing having a bottom plate, a compressor provided inside the housing, a heat exchanger, and a blower that ventilates the heat exchanger.

By the way, the refrigeration cycle device may frost on the heat exchanger of the outdoor unit by continuing the heating (heating) operation in an environment where the outside air temperature is low such as in a cold region or a snowfall region. When the heat exchanger of the outdoor unit is frosted, the heat exchange performance of the refrigeration cycle device is significantly deteriorated.

Therefore, the refrigeration cycle apparatus periodically performs a defrosting operation (so-called defrosting operation) for melting the frost adhering to the heat exchanger of the outdoor unit. In the defrosting operation, the attached frost is melted by passing a high-temperature refrigerant through the heat exchanger of the outdoor unit and dropped onto the bottom plate. The drain water (drainage, melted frost) generated by this defrosting operation is drained to the outside through a drainage port provided on the bottom plate of the outdoor unit.

However, when the outside air temperature is below freezing point, the drain water generated by the defrosting operation may freeze on the bottom plate before being drained to the outside of the outdoor unit. That is, the drain water freezes before reaching the drain port, and is not drained normally.

Therefore, the outdoor unit of the conventional refrigeration cycle device is provided with an electric heating device provided on the upper surface of the bottom plate.

JP-A-2015-55455

The electric heating device of the conventional outdoor unit is provided with a sheathed heater as an electric heating device, which can be bent to some extent but is difficult to lay in a free path. That is, the electric heating device of the conventional outdoor unit needs to be manufactured in advance in a shape suitable for the laying path.

Therefore, a heater (so-called cord heater) that is flexible and can be bent freely, which can flexibly set the laying path, may be applied to the electric heating device of the outdoor unit.

However, in general, the heat generation capacity per unit area of a flexible heater is inferior to the heat generation capacity per unit area of a conventional sheathed heater. That is, there is a trade-off between the degree of freedom of the heater laying path and the heat generation capacity per unit area of the heater.

Therefore, the present invention proposes an outdoor unit of a refrigeration cycle device capable of reliably draining drain water generated by defrosting operation by using a flexible heater whose heat generation capacity per unit area is inferior to that of a conventional sheathed heater. To do.

In order to solve the above problems, the outdoor unit of the refrigeration cycle device according to the embodiment of the present invention has a bottom plate having a drain port and a flexible bottom plate, and is doubled in all or a part around the drain port. It is equipped with a linear heater having a double laying portion laid in.

Further, the outdoor unit of the refrigeration cycle device according to the embodiment of the present invention includes a fixture for fixing at least the double laying portion of the heater to the bottom plate at once, and a fixing member for fixing the fixture to the bottom plate. And, it is preferable to have.

Further, it is preferable that the outdoor unit of the refrigeration cycle device according to the embodiment of the present invention includes a partition plate integrally molded with a fixture and sandwiched between the heaters in the double laying portion.

Further, the outdoor unit of the refrigeration cycle apparatus according to the embodiment of the present invention preferably includes a heater holding piece that is integrally molded with the fixture and plastically deformed to hold the heater in the fixture. ..

The fixture of the outdoor unit of the refrigeration cycle device according to the embodiment of the present invention is made of sheet metal, and the heater holding piece is located between the fixture and the bottom plate, so that the heater and the bottom plate are separated from each other. It is preferable that a gap is secured.

The outdoor unit of the refrigeration cycle device according to the embodiment of the present invention includes a heat exchanger arranged above the bottom plate, has a plurality of drainage ports, and all or a part of each of the drainage ports is the above. It is preferably located within the projected area of the heat exchanger onto the bottom plate.

It is preferable that the fixture of the outdoor unit of the refrigeration cycle device according to the embodiment of the present invention is integrally molded in the projection region.

The heater of the outdoor unit of the refrigeration cycle apparatus according to the embodiment of the present invention has a linear shape in which a heat wire and an electric wire parallel to the heat wire are integrated, and the heat wire is closer to the bottom plate than the electric wire. It is preferably arranged in.

The outdoor unit of the refrigeration cycle device according to the embodiment of the present invention includes a blower arranged on the bottom plate so as to face the heat exchanger. The heater was laid on the bottom plate at the bottom of the blower.

It is an exploded perspective view of an example of the outdoor unit of the refrigeration cycle apparatus which concerns on embodiment of this invention. The plan view of the bottom plate of the outdoor unit and the electric heating device which concerns on embodiment of this invention. The plan view of the bottom plate of the outdoor unit and the electric heating device which concerns on embodiment of this invention. The plan view of the bottom plate of the outdoor unit and the electric heating device which concerns on embodiment of this invention. The perspective view of the bottom plate of the outdoor unit and the electric heating device which concerns on embodiment of this invention. The perspective view of the bottom plate of the outdoor unit and the electric heating device which concerns on embodiment of this invention. The perspective view of the state in which the heater of the outdoor unit which concerns on embodiment of this invention is laid on the bracket. The perspective view of the bracket of the outdoor unit which concerns on embodiment of this invention. The perspective view of the bracket of the outdoor unit which concerns on embodiment of this invention. The cross-sectional view in the double laying part of the heater of the outdoor unit which concerns on embodiment of this invention.

An embodiment of the outdoor unit of the refrigeration cycle apparatus according to the present invention will be described with reference to FIGS. 1 to 10. In the plurality of drawings, the same or corresponding configurations are designated by the same reference numerals.

FIG. 1 is an exploded perspective view of an example of an outdoor unit of a refrigeration cycle device according to an embodiment of the present invention.

As shown in FIG. 1, the outdoor unit 1 of the refrigeration cycle device according to the present embodiment includes a housing 13 having an air intake port 11 and an air outlet 12, and a compressor 15 arranged in the housing 13. A blower 16 arranged in the housing 13, a heat exchanger 17 arranged in the housing 13, and an electric component box 18 arranged in the housing 13 are provided.

The housing 13 has a rectangular parallelepiped shape. The width dimension (dimension in the left-right direction) of the housing 13 is larger than the depth dimension (dimension in the front-rear direction) of the housing 13. The housing 13 includes a bottom plate 21, a left side plate 22a covering the left side surface, a right side plate 22b covering the right side surface, a front plate 25 covering the front surface, fingered 26 covering the back surface, and a top plate 27 covering the top surface. And a partition plate 28 which is provided upright on the bottom plate 21 and partitions the inside of the housing 13 to the left and right.

The bottom plate 21 has a rectangular shape in a plan view. The width dimension of the bottom plate 21 is larger than the depth dimension of the bottom plate 21. The bottom plate 21 is substantially parallel to the ground plane of the outdoor unit 1. The bottom plate 21 is a processed product of thick sheet metal for supporting each of the built-in parts. The compressor 15, the blower 16, and the heat exchanger 17 are supported and fixed to the bottom plate 21.

The front plate 25, which is the front surface of the housing 13, is made of a thin sheet metal. The front plate 25 has a circular air outlet 12 in the center. The air outlet 12 is provided with a fan guard 29 having a fine grid-like opening.

The fingered 26 obscures the heat exchanger 17.

The partition plate 28 is a plate-shaped member made of sheet metal and extending in the vertical direction. The partition plate 28 is fixed to the bottom plate 21 with screws or the like. The partition plate 28 divides the inside of the housing 13 into two in the width direction (left-right direction) of the housing 13. The space on the right side in the housing 13 partitioned by the partition plate 28 is the machine room 31. The space on the left side in the housing 13 partitioned by the partition plate 28 is the blower chamber 32.

The compressor 15 is arranged in the machine room 31. Inside the compressor 15, a compression mechanism (not shown) that compresses and sends out the refrigerant circulating in the refrigeration cycle, and an electric motor (not shown) that drives the compression mechanism are provided.

The blower 16 and the heat exchanger 17 are arranged in the blower chamber 32. The heat exchanger 17 is a find tube type. The heat exchanger 17 extends along the back surface and the left side surface of the housing 13 and has an L shape in a plan view. The blower 16 has a propeller fan. The blower 16 is arranged between the front plate 25 of the housing 13 and the heat exchanger 17 with the rotation center line directed in the front-rear direction of the housing 13. The blower 16 is arranged on the bottom plate 21 so as to face the heat exchanger 17.

If the heating operation is continued in an environment where the outside air temperature is low, such as in a cold region or a snowfall region, the heat exchanger 17 of the outdoor unit 1 will frost. Therefore, the refrigeration cycle apparatus executes a defrosting operation for melting the frost adhering to the heat exchanger 17 periodically or when frost formation is detected. The defrosting operation is performed in a cooling (cooling) operation state by driving a four-way valve (not shown) that switches the flow of the refrigerant during the refrigeration cycle. By switching the four-way valve, the heat exchanger 17, which has functioned as an evaporator during the heating (heating) operation, functions as a condenser. Then, the high temperature refrigerant circulates in the heat exchanger 17. As a result, the temperature of the heat exchanger 17 rises, the frost adhering to the fins and pipes constituting the heat exchanger 17 melts, and the melted water flows down onto the bottom plate 21.

However, when the outside air temperature is below the freezing point, the drain water generated by the defrosting operation, that is, the drain water dripping from the heat exchanger 17 (also referred to as drainage) freezes before being drained to the outside of the outdoor unit 1. There is a risk of doing so. As will be described later, the bottom plate 21 is a substantially flat plate, and has an appropriate drain port (hole) mainly in the lower part of the heat exchanger in order to drain the drain water to the outside of the outdoor unit 1.

Therefore, the outdoor unit 1 according to the present embodiment is provided with an electric heating device that prevents the drain water from freezing. The electric heating device of the outdoor unit 1 according to the present embodiment will be described.

2 to 4 are plan views of the bottom plate 21 and the electric heating device 46 of the outdoor unit according to the embodiment of the present invention.

5 and 6 are perspective views of the bottom plate 21 and the electric heating device 46 of the outdoor unit according to the embodiment of the present invention.

Note that FIG. 2 is a diagram for explaining the arrangement of the electric heating device 46 installed on the bottom plate 21 of the outdoor unit. Since the heater 46 is a fixture and is attached to the bottom plate 21 by the bracket 47 shown by the alternate long and short dash line in FIG. 2, the state as shown in FIG. 2 does not actually exist. In FIG. 3, a bracket 47 for attaching the electric heating device 46 to the bottom plate 21 is shown. Further, in FIG. 3, the heat exchanger 17 installed on the bracket 47 is shown by a chain double-dashed line. FIG. 5 corresponds to the perspective view of FIG. 3, and FIG. 6 corresponds to the perspective view of FIG.

As shown in FIGS. 2 to 4, the outdoor unit 1 of the refrigeration cycle device according to the present embodiment includes an electric heating device 41 that prevents the drain water dripping from the heat exchanger 17 from freezing during the defrosting operation. The electric heating device 41 is provided on the bottom plate 21.

Here, first, the heat exchanger 17 of the outdoor unit 1 is bent in an L shape along the inner surface of the back surface and the inner surface of the left side surface of the outdoor unit 1. Hereinafter, regarding the heat exchanger 17, the portion along the back surface of the outdoor unit 1 is referred to as a back surface portion 17a, and the portion along the left side surface of the outdoor unit 1 is referred to as a side surface portion 17b.

The bottom plate 21 of the housing 13 has a drain port 43 for draining drain water dripping from the heat exchanger 17 to the outside (outside) of the outdoor unit 1.

A plurality of drainage ports 43 are provided. Most of each drainage port 43 is arranged in the projection region PA (heat exchanger 17 shown by the alternate long and short dash line in FIG. 3) on the bottom plate 21 of the heat exchanger 17, which is the place where the drain water drops most. ..

Specifically, the first drainage port 43a is an elongated hole that is arranged along the back surface of the outdoor unit 1 and is long in the width direction of the outdoor unit 1. As shown in FIG. 3, the first drain port 43a is entirely contained in the projection area PA of the back surface portion 17a of the heat exchanger 17 on the bottom plate 21.

The second drainage port 43b is the drainage port having the largest opening area. The second drain port 43b is arranged along the back surface of the outdoor unit 1 and has a circular shape. The second drain port 43b is arranged directly behind the blower 16 in a plan view. The second drain port 43b partially protrudes from the projection region PA on the bottom plate 21 of the heat exchanger 17 to the blower 16 side. The second drain port 43b is provided substantially in the center of the back surface portion 17a of the heat exchanger 17. Therefore, the second drainage port 43b is a drainage port from which the largest amount of drain water flows out.

The third drainage port 43c is arranged along the left side surface of the outdoor unit 1 and is a long hole elongated in the front-rear direction of the outdoor unit 1. The third drain port 43c fits in the projection region PA of the side surface portion 17b of the heat exchanger 17 on the bottom plate 21. The third drain port 43c mainly drains the drain water dropped from the side surface portion 17b of the heat exchanger 17 to the outside (lower part).

The fourth drainage port 43d is arranged along the back surface of the outdoor unit 1 and is substantially a long hole elongated in the width direction of the outdoor unit 1. The fourth drainage port 43d is closer to the left back corner (corner) of the outdoor unit 1 than the second drainage port 43b. The fourth drainage port 43d is arranged near the corner on the left back side of the outdoor unit 1. The fourth drain port 43d fits in the projection area PA on the bottom plate 21 of the heat exchanger 17.

The fifth drainage port 43e is arranged at a corner (corner) on the left back side of the outdoor unit 1. The fifth drainage port 43e is located directly below the bent portion of the L-shaped heat exchanger 17, and fits in the projection region PA of the heat exchanger 17 on the bottom plate 21. The fourth drainage port 43d and the fifth drainage port 43e are auxiliary drainage ports. The fourth drainage port 43d and the fifth drainage port 43e are provided in consideration of the possibility that the drain water cannot be completely drained at the main second drainage port 43b and the third drainage port 43c.

The electric heating device 41 is flexible, and has a single linear heater 46 having a double laying portion 45 that is double laid all or a part around the drain port 43, and at least one linear heater 46. It includes a bracket 47 as a fixture for collectively fixing the double laying portion 45 of the heater 46 to the bottom plate 21, and a screw 48 as a fixing member for fixing the bracket 47 to the bottom plate 21.

The flexible heater 46, the so-called cord heater, is cheaper than the sheathed heater, but generates less heat. The heater 46 has two wires running in parallel and a coating made of silicon rubber or the like that covers the periphery of the two wires. One end 46a (starting end) of the heater 46 is an electrical input end for power connection. At the other end 46b (termination) of the heater 46, the two internal wires are electrically connected by crimping or the like. One of the two wires is a hot wire, and the other is an electric wire for passing electricity through the hot wire.

The heater 46 is laid on the upper surface of the bottom plate 21 of the housing 13 while being held by the bracket 47. That is, after the heater 46 is laid on the bracket 47, the heater 46 is laid integrally with the bracket 47 on the bottom plate 21 of the housing 13 while maintaining the laying path.

Hereinafter, with respect to the arrangement of the heater 46 having one linear shape, the laying route from one end 46a (starting end) of the heater 46 to the other end 46b (ending) will be described in order. The heater 46 starts from a start end (one end 46a) connected to an AC power source in the electric component box 18 (FIG. 1) provided in the machine room 31 of the outdoor unit 1. The heater 46 extends from one end 46a and enters the blower chamber 32, and once crosses the front of the first drain port 43a from the right side to the left side (part 46c in FIG. 2). Subsequently, the heater 46 is folded back before reaching the second drain port 43b (part 46d in FIG. 2). The heater 46 follows the opening shape of the first drainage port 43a and extends to the second drainage port 43b via the front side, the right side, and the back side of the first drainage port 43a. Here, the heater 46 follows the opening shape of the second drainage port 43b and passes through the back side of the second drainage port 43b. After that, the heater 46 follows the shape of the edge of the bottom plate 21 of the housing 13, passes through the left back corner of the bottom plate 21, and extends toward the third drain port 43c. Subsequently, the heater 46 passes closer to the edge of the bottom plate 21 of the housing 13 than the fourth drainage port 43d and the fifth drainage port 43e on the route from the second drainage port 43b to the third drainage port 43c. After that, when the heater 46 reaches the third drain port 43c, it passes through the left side, the front side, and the right side of the third drain port 43c. The heater 46 is folded back before reaching the fourth drainage port 43d and the fifth drainage port 43e, and extends toward the third drainage port 43c again.

The laying path of the heater 46 up to this point includes a portion corresponding to the outer path of the double laying portion 45.

Next, when the heater 46 reaches the third drainage port 43c, it passes through the inside of the outer path (the part close to the third drainage port 43c), and passes through the right side, the front side, and the left side of the third drainage port 43c, and the fourth. It extends toward the drainage port 43d. The heater 46 changes the extending direction to the right before reaching the fourth drainage port 43d and crosses the front of the fourth drainage port 43d and the fifth drainage port 43e. The heater 46 extends toward the second drainage port 43b when it crosses the front of the fourth drainage port 43d and the fifth drainage port 43e. When the heater 46 reaches the second drainage port 43b, it passes through the inside (the part close to the second drainage port 43b) from the outer path, and follows the shape of the second drainage port 43b on the back side of the second drainage port 43b. It extends toward the first drainage port 43a. Further, when the heater 46 reaches the first drainage port 43a, it passes through the inside of the outer path (the part close to the first drainage port 43a), and passes through the back side, the left side, and the front side of the first drainage port 43a to drain the second drainage. It extends toward the mouth 43b. Subsequently, when the heater 46 reaches the second drainage port 43b, it crosses the front side of the second drainage port 43b from the right side to the left side following the shape of the second drainage port 43b.

The laying path of the heater 46 up to this point includes a portion corresponding to the inner path of the double laying portion 45. Then, among the laying paths of the heater 46, the front side, the right side, and the back side of the first drainage port 43a, the back side of the second drainage port 43b, and the left side, the front side, and the right side of the third drainage port 43c. The part that includes the above and reaches the second drainage port 43b from the first drainage port 43b, the part that goes from the second drainage port 43b to the fourth drainage port 43d, and the part that crosses the front side of the fifth drainage port 43e. It is a double laying portion 45 of the heater 46.

The double laying portion 45 is appropriately set according to the inflow route and the inflow amount of the drain water flowing into the drainage port from the viewpoint of preventing the drainage water from freezing around the drainage port 43. That is, even if the double laying portion 45 of the heater 46 and the single laying portion are mixed around the drain port 43, the entire circumference of the drain port 43 is surrounded by the double laying portion 45. Is also good. For example, in the inner path of the heater 46, the portion extending from the left side of the third drainage port 43c toward the fourth drainage port 43d is bypassed to the back side of the third drainage port 43c, and the entire circumference of the third drainage port 43c is diverted. It is also possible to surround the double laying portion 45.

Next, the heater 46 crosses the front side of the fourth drainage port 43d, passes through the right side of the third drainage port 43c, and enters the lower region of the blower 16 (the region 16 indicated by the broken line in the figure). The heater 46 meanders from the right side to the left side in the lower region of the blower 16 and reaches the end (the other end 46b). That is, the heater 46 is laid on the bottom plate of the lower part of the blower 16 in addition to the lower part of the heat exchanger 17.

Since the heater 46 surrounds the drain port 43, it is preferable that the heater 46 does not completely adhere to the bottom plate 21 so that the drain water in the defrosting operation reaches the drain port 43 reliably. It is desirable that the heater 46 separates a gap of 0.5 mm or less from the bottom plate 21 in a range that does not substantially affect the heating of the bottom plate 21. With this dimensional setting, the drain water can flow under the heater 46, and the drain water dripping on the outside of the heater 46 can also pass under the heater 46 and flow into the drain port 43.

Further, the portion of the heater 46 laid in the lower region of the blower 16 is designed to melt the snow that has entered the outdoor unit 1 in order to prevent the snow that has entered the outdoor unit 1 from accumulating until it hinders the rotation of the blower 16. It has become. If it is installed in a cold region where there is not much snow, the heater 46 in this portion is unnecessary.

The bracket 47 includes a double laying portion 45 of the heater 46, and includes a first bracket 51 that hangs on a projection region PA of the heat exchanger 17 on the bottom plate 21, a second bracket 52 that is arranged in a lower region of the blower 16. Includes.

The first bracket 51 is integrally molded in the projection region PA. The first bracket 51 is, for example, a processed sheet metal product obtained by processing a sheet metal.

The first bracket 51 follows the laying path of the heater 46 laid in the projection area PA, in other words, the laying path of the heater 46 including the double laying portion 45. Further, the first bracket 51 has a cross-linked portion 53 for reinforcement. The cross-linked portion 53 does not cover the heater 46. The cross-linking portion 53 increases the overall strength of the first bracket 51 and improves the handling of the first bracket 51 integrated by laying the heater 46. The bridged portion 53 includes, for example, the right side of the first drainage port 43a (first bridge portion 53a), the left and right sides of the second drainage port 43b (second bridge portion 53b), the first drainage port 43a and the second drainage port in a plan view. A loop of a heater 46 that folds back at an appropriate part of the laying route between the port 43b (third cross-linking portion 53c), the back side of the third drainage port 43c (fourth cross-linking section 53d), and near the third drainage port 43c. It is provided in an intermediate portion (fifth bridge portion 53e) of the heater 46 that penetrates the portion and the lower region of the blower 16.

The first bracket 51 may be divided into a plurality of parts. For example, the first bracket 51 includes an integral part including a double laying portion 45 around the first drainage port 43a, an integral part including a double laying portion 45 around the second drainage port 43b, and a third drainage port. It may be divided into an integral part including a double laying portion 45 around 43c.

The second bracket 52 extends linearly in the left-right direction (width direction of the outdoor unit 1) in the lower region of the blower 16.

A part of the heater 46 protrudes from the second bracket 52 and meanders so as to intersect the extending direction of the second bracket 52. This meandering portion is used for adjusting the individual difference (variation between products) in the length of the heater 46 when laying the heater 46 on the first bracket 51 and the second bracket 52. When the heater 46 is laid on the first bracket 51 and the second bracket 52, if there is an extra length at the end of the heater 46, a larger length is allocated to the meandering portion to adjust the extra length.

The screws 48 are, for example, the first bridge portion 53a, the back side of the second drain port 43b, the left side of the fourth drain port 43d, the fourth bridge portion 53d, the right side of the third drain port 43c, and the right side of the second drain port 43b. The first bracket 51 is fixed to the bottom plate 21 at the middle portion of the laying path from the blower 16 to the lower region and the end portion thereof. A fixed flange 58 having a screw hole 57, which will be described later, is integrally provided with the first bracket 51 at the screwing position of the first bracket 51.

Further, the screw 48, for example, fixes an appropriate portion of the second bracket 52 to the bottom plate 21.

FIG. 7 is a perspective view showing a state in which the heater of the outdoor unit according to the embodiment of the present invention is laid on the bracket.

8 and 9 are perspective views of the bracket of the outdoor unit according to the embodiment of the present invention.

8 is a perspective view of the bracket 47 viewed from above, and FIG. 9 is a perspective view of the bracket 47 viewed from below.

As shown in FIG. 7, the heater 46 of the outdoor unit 1 of the refrigeration cycle device according to the present embodiment is laid and integrated with the bracket 47 before being laid on the bottom plate 21 of the outdoor unit 1.

Therefore, as shown in FIGS. 8 to 9, the bracket 47 of the outdoor unit 1 of the refrigeration cycle apparatus according to the present embodiment is integrally molded with the bracket 47 and is plastically deformed so that the bracket 47 holds the heater 46. It includes a heater holding piece 55.

First, the bracket 47 has a U-shaped open cross section that holds the heater 46. The bracket 47 has a U-shaped open portion facing the bottom plate 21. Most of the side wall of the bracket 47 (the wall standing against the bottom plate 21 of the housing 13) is provided so that the heat of the heater 46 warms the bottom plate 21 as much as possible and does not dissipate heat from the bracket 47 side. It is separated from the bottom plate 21 of the housing 13 without reaching the bottom plate 21 of the housing 13.

The heater holding piece 55 is formed of a sheet metal integral with the bracket 47. The heater holding piece 55 projects from the side wall of the bracket 47. The heater holding piece 55 protrudes from the heater 46 laid on the bracket 47 in a state of extending straight from the side wall of the bracket 47. A wedge-shaped notch is provided at the base of this protruding portion. The heater holding piece 55 can be easily bent at this narrowed notch. The heater 46 is fixed to the bracket 47 by bending the heater holding piece 55 at the notch. When the bracket 47 is screwed and fixed to the bottom plate 21, the heater holding piece 55 comes into close contact with the bottom plate 21. Therefore, in most of the heaters 46 that are not held by the heater holding piece 55, the gap H between the bottom plate 21 and the heater 46 is equal to the thickness of the heater holding piece 55, that is, the thickness of the sheet metal forming the bracket 47. Is formed. That is, by appropriately selecting the thickness of the sheet metal of the bracket 47, the gap between the bottom plate 21 and the heater 46 can be appropriately secured.

The heater holding piece 55 is provided at an appropriate position on the bracket 47. For example, the heater holding piece 55 is provided so as not to be provided around the portion where the flexible heater 46 is bent and laid, or the length of the non-fixed straight portion of the heater 46 does not exceed 50 mm. Or it is provided in the double laying portion 45 of the heater 46.

The heater holding piece 55 may not only be bent to directly hold the heater 46, but may also be inserted into a slit (not shown) of the bottom plate 21 and bent on the back surface (bottom surface) side of the bottom plate 21. In this case, the heater holding piece 55 not only holds the heater 46 to the bracket 47, but also serves as a fixing member for fixing the bracket 47 to the bottom plate 21. For example, it is particularly effective in a place where the screw 48 cannot be arranged.

Further, the bracket 47 includes a fixing flange 58 having a screw hole 57 through which the screw 48 is inserted. The fixing flange 58 corresponds to the arrangement of the screws 48. The fixed flange 58 is also integrally molded with the sheet metal bracket 47. The fixed flange 58 is formed by bending from a sheet metal including the bracket 47.

FIG. 10 is a cross-sectional view of the double laying portion of the heater of the outdoor unit according to the embodiment of the present invention.

In addition to FIGS. 8 and 9, as shown in FIG. 10, the heater 46 of the outdoor unit 1 of the refrigeration cycle apparatus according to the present embodiment includes a heat wire 61, an electric wire 62 parallel to the heat wire 61, a heat wire 61, and an electric wire. It is provided with an outer cover 63 for bundling 62. The outer cover 63 is a flexible coating such as silicone rubber. When the heater 46 is energized, the heat wire 61 generates heat at a high temperature, and the electric wire 62 hardly generates heat.

The bracket 47 holds the heater 46 so that the high temperature side of the heater 46 is arranged closer to the bottom plate 21 than the low temperature side. In other words, the heat wire 61 is arranged on the lower side of the electric wire 62 and closer to the bottom plate 21. This makes it possible to efficiently heat the bottom plate 21 side.

The first bracket 51 includes a partition plate 65 sandwiched between the heaters 46 of the double laying portion 45.

The partition plate 65 is integrally molded with the first bracket 51. The partition plate 65 is integrally formed with the first bracket 51 by a so-called cutting and bending process in which a notch for punching is provided in a part of the first bracket 51 and the notch is bent toward the back side of the top plate. Therefore, the first bracket 51 has an opening 66 at a position where the partition plate 65 is provided. The partition plate 65 is substantially centered in the width direction (direction intersecting the stretching direction) of the first bracket 51. In other words, the partition plate 65 bisects the inside of the bracket 47 in the width direction. Then, for each of the bisected recesses (inside the bracket 47), the heat wire 61 is arranged on the opening side, and the electric wire 62 is arranged on the back side to house the heater 46.

The double laying portion 45 of the heater 46 is sandwiched and held between the side wall of the first bracket 51 and the partition plate 65. Further, in the heater 46 other than the double laying portion 45 of the heater 46, that is, the portion that is simply a single layer, the heat wire 61 is arranged on the opening side and the electric wire 62 is arranged on the back side on both side walls of the bracket 47. It is sandwiched and held.

The outdoor unit 1 of the refrigeration cycle device according to the present embodiment is a linear heater that is flexible and has a double laying portion 45 that is doubly laid all or part around the drain port 43. It has 46. Therefore, while the outdoor unit 1 is provided with a flexible heater 46 having a heat generation capacity per unit area inferior to that of the conventional sheathed heater, it is easy to increase the degree of freedom in the laying path of the heater 46. That is, in the outdoor unit 1, the heater 46 is doubly laid all or part around the drainage port 43 where the drainage water is collected, which is likely to cause freezing of the drainage water, to increase the heat generation amount of the drainage port 43 part. It warms intensively and enables smooth drainage. Further, the outdoor unit 1 suppresses the consumption of extra power without laying the heater 46 twice in the portion where the drain water flowability is not affected even at a lower temperature than the circumference of the drain port 43. ..

The outdoor unit 1 of the refrigeration cycle device according to the present embodiment includes at least a bracket 47 for collectively fixing the double laying portions 45 of the heater 46 to the bottom plate 21. Therefore, the outdoor unit 1 can surely hold the double laying portion 45 of the heater 46 with the bracket 47, and can surely guarantee the heating capacity of the portion.

Further, the outdoor unit 1 of the refrigeration cycle device according to the present embodiment includes a partition plate 65 integrally molded with the bracket 47 and sandwiched between the heaters 46 of the double laying portion 45. Therefore, the outdoor unit 1 can surely hold the double laying portion 45 of the heater 46, which is flexible due to the vibration caused by the operation of the compressor 15 and the blower 16 and the vibration during transportation.

Further, the outdoor unit 1 of the refrigeration cycle device according to the present embodiment includes a heater holding piece 55 that holds the heater 46 on the bracket 47 by plastic deformation. Therefore, when laying the heater 46, the outdoor unit 1 can securely hold the double laying portion 45 with the bracket 47, and can reduce the labor required for laying the portion.

In the outdoor unit 1 of the refrigeration cycle device according to the present embodiment, the gap between the heater 46 and the bottom plate 21 is secured by locating the heater holding piece 55 between the bracket 47 and the bottom plate 21. Therefore, the outdoor unit 1 can appropriately secure the gap between the bottom plate 21 and the heater 46 so as to be 0.5 mm or less, for example, by appropriately selecting the thickness of the sheet metal of the bracket 47. ..

Furthermore, the outdoor unit 1 of the refrigeration cycle apparatus according to the present embodiment includes a plurality of drainage ports 43, all or part of which are arranged in the projection area PA on the bottom plate 21 of the heat exchanger 17. The outdoor unit 1 can easily route (lay) a flexible heater 46 around the plurality of drainage ports 43.

Further, the outdoor unit 1 of the refrigeration cycle device according to the present embodiment includes a bracket 47 integrally molded in the projection region PA of the heat exchanger 17 on the bottom plate 21. Therefore, the outdoor unit 1 can securely hold the double laying portion 45 with the bracket 47, and can easily lay the flexible heater 46 in the projection area PA all at once.

Further, the outdoor unit 1 of the refrigeration cycle device according to the present embodiment includes a heater 46 having a heat wire 61 arranged closer to the bottom plate 21 than the electric wire 62. That is, the outdoor unit 1 can reliably arrange the heat wire 61 closer to the bottom plate 21 than the electric wire 62 by securely holding the flexible heater 46 with the bracket 47.

Therefore, according to the outdoor unit 1 of the refrigeration cycle device according to the present embodiment, even if a flexible heater 46 having a heat generation capacity per unit area inferior to that of the sheathed heater is used, the drain water generated by the defrosting operation is surely ensured. Can be drained to.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... outdoor unit, 11 ... air inlet, 12 ... air outlet, 13 ... housing, 15 ... compressor, 16 ... blower, 17 ... heat exchanger, 17a ... back part, 17b ... side part, 18 ... electricity Parts box, 21 ... Bottom plate, 22a ... Left side plate, 22b ... Right side plate, 25 ... Front plate, 26 ... Fingered, 27 ... Top plate, 28 ... Partition plate, 29 ... Fan guard, 31 ... Machine room, 32 ... Blower Room, 41 ... Electric heater, 43 ... Drainage port, 43a ... First drainage port, 43b ... Second drainage port, 43c ... Third drainage port, 43d ... Fourth drainage port, 43e ... Fifth drainage port, 45 ... 2 Heavy laying part, 46 ... heater, 46a ... one end (start end) of heater, 46b ... other end (end) of heater, 46c ... first drain port of heater front crossing part, 46c ... first drain port of heater Folded part, 47 ... bracket (fixing tool), 48 ... screw (fixing member), 51 ... first bracket, 52 ... second bracket, 53 ... bridge part, 53a ... first bridge part, 53b ... second bridge part, 53c ... 3rd bridge, 53d ... 4th bridge, 53e ... 5th bridge, 55 ... heater holding piece, 57 ... screw hole, 58 ... fixed flange, 61 ... heat wire, 62 ... wire, 63 ... jacket, 65 ... Partition plate, 66 ... Opening.

Claims (9)

A bottom plate with a drain and
An outdoor unit of a refrigeration cycle apparatus comprising a linear heater that is flexible and has a double laying portion that is double laid all or part around the drain port. At least a fixture that collectively fixes the double laying portion of the heater to the bottom plate, and
The outdoor unit of the refrigeration cycle apparatus according to claim 1, further comprising a fixing member for fixing the fixture to the bottom plate. The outdoor unit of the refrigeration cycle apparatus according to claim 2, further comprising a partition plate integrally molded with the fixture and sandwiched between the heaters in the double laying portion. The outdoor unit of the refrigeration cycle apparatus according to claim 2 or 3, further comprising a heater holding piece that holds the heater in the fixture by being integrally molded with the fixture and plastically deformed. The fixture is made of sheet metal, and any of claims 2 to 4 in which a gap between the heater and the bottom plate is secured by locating the heater holding piece between the fixture and the bottom plate. The outdoor unit of the refrigeration cycle apparatus according to item 1. A heat exchanger located above the bottom plate
The one according to any one of claims 1 to 5, wherein there are a plurality of the drainage ports, and all or a part of each of the drainage ports is arranged in a projection area of the heat exchanger on the bottom plate. Outdoor unit of refrigeration cycle equipment. A heat exchanger located above the bottom plate
There are a plurality of the drainage ports, and all or a part of each of the drainage ports is arranged in a projection area of the heat exchanger on the bottom plate, and the fixture is integrally molded in the projection area. The outdoor unit of the refrigeration cycle apparatus according to any one of claims 2 to 5. The heater has a linear shape in which a hot wire and an electric wire parallel to the hot wire are integrated.
The outdoor unit of the refrigeration cycle apparatus according to any one of claims 1 to 7, wherein the heat wire is arranged closer to the bottom plate than the electric wire. A blower arranged on the bottom plate facing the heat exchanger is provided.
The outdoor unit of the refrigeration cycle device according to claim 6 or 7, wherein the heater is laid on the bottom plate below the blower.

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