JP6429986B2 - Outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of a refrigeration cycle apparatus.

  Conventionally, in an outdoor unit of a refrigeration cycle apparatus such as an air conditioner, a compressor, a heat exchanger, a blower, and the like are housed inside a casing. Moreover, the outdoor unit of the air conditioner is connected to an indoor unit in which a heat exchanger, a blower, and the like are accommodated via a refrigerant pipe. In the air conditioner, when the compressor is driven, the refrigerant circulates between the indoor unit and the outdoor unit via the refrigerant pipe.

  When connecting the refrigerant pipe to the outdoor unit, the refrigerant pipe is attached to a connection port provided on the outer surface of the casing of the outdoor unit. The position of the connection port is installed, for example, on the rear panel side of the housing (see Patent Document 1).

JP 11-264586 A

  Inside the outdoor unit, an internal refrigerant circuit that connects a compressor, a four-way valve, a heat exchanger, and the like is housed in a complicated manner. Especially in the machine room where the compressor is housed, refrigerant piping connected from the piping connection port and refrigerant piping connected to the heat exchanger are complicated, and if the assembly accuracy of each member is poor, the refrigerant piping etc. Operation noise may be generated in contact with members.

  This invention is made in order to solve such a subject, and provides the outdoor unit which suppressed the operation noise by improving the assembly precision of each member around the piping connection port of an outdoor unit. It is aimed.

An outdoor unit according to the present invention is an outdoor unit including a housing having a front panel, a side panel, and a rear panel, and a heat exchanger, and the rear panel is connected to which a pipe connection port is attached. has a port mounting portion, and a heat exchanger holding piece heat exchanger is mounted Rutotomoni, a rear portion which forms an outer shell surface of the housing, a concave portion for connecting the port mounting part is formed, a, The concave surface portion is disposed on the inner side of the housing with respect to the back surface portion .

  According to the outdoor unit of the present invention, the heat exchanger and the pipe connection port are attached to the rear panel, and the heat exchanger and the internal refrigerant circuit in the machine room containing the compressor and the like are relatively accurate. Since the positioning is performed, the assembly accuracy of each member such as the internal refrigerant circuit and the heat exchanger around the pipe connection port is improved, and operation noise due to contact of the refrigerant pipe and the like can be reduced.

1 is a front side perspective view of an outdoor unit according to Embodiment 1. FIG. 3 is a rear perspective view of the outdoor unit according to Embodiment 1. FIG. It is the back side perspective view seen from the angle different from FIG. 2 of the outdoor unit which concerns on Embodiment 1. FIG. FIG. 3 is a cross-sectional view of the outdoor unit according to the first embodiment. 5 is a partial enlarged view of a pipe connection port A portion in FIG. 4 of the outdoor unit according to Embodiment 1. FIG. It is a perspective view of the heat exchanger and back panel of the outdoor unit which concerns on Embodiment 1. FIG. It is the perspective view which looked at the heat exchanger and back panel of the outdoor unit which concerns on Embodiment 1 from the angle different from FIG. It is the top view of the back panel of the outdoor unit which concerns on Embodiment 1, and the 4th surface side view. It is a perspective view of the heat exchanger and back panel of the outdoor unit which concerns on Embodiment 2. FIG. The heat exchanger and the rear panel of the outdoor unit according to the second embodiment is that of FIG. 9 is a perspective view from a different angle. It is a perspective view of the back panel of the outdoor unit which concerns on Embodiment 2. FIG. The Figure 11 the rear panel of the outdoor unit according to the second embodiment is a perspective view from a different angle. FIG. 13 is a perspective view of the rear panel of the outdoor unit according to the second embodiment when viewed from an angle different from FIGS. It is the top view of the back panel of the outdoor unit which concerns on Embodiment 2, and the 4th surface side view. It is the top view of the heat exchanger holding piece of the outdoor unit which concerns on Embodiment 2, and its 4th surface side view.

Hereinafter, an outdoor unit of an air conditioner according to the present invention will be described with reference to the drawings.
The configuration of the outdoor unit described below is merely an example, and the outdoor unit according to the present invention is not limited to such a configuration. Moreover, in each figure, the same code | symbol is attached | subjected to the same or similar thing, or attaching | subjecting code | symbol is abbreviate | omitted. Further, the illustration of the fine structure is simplified or omitted as appropriate. In addition, overlapping or similar descriptions are appropriately simplified or omitted.

Embodiment 1 FIG.
An outdoor unit according to Embodiment 1 will be described with reference to FIGS.
1 is a front perspective view of an outdoor unit according to Embodiment 1. FIG.
2 is a rear perspective view of the outdoor unit according to Embodiment 1. FIG.
3 is a rear perspective view of the outdoor unit according to Embodiment 1 as viewed from an angle different from that in FIG. 2.

<Configuration of outdoor unit>
As shown in FIG. 1, the casing 1 of the outdoor unit is made of sheet metal and has a substantially rectangular parallelepiped shape. As shown in FIGS. 1 to 3, the housing 1 includes a front panel 10 disposed on the front side of the housing 1, two side panels 20 that cover the side surface of the housing 1, and a rear surface of the housing 1. The rear panel 30_1 disposed on the side, the top panel 40 that covers the upper surface, and the bottom panel 50 that covers the lower surface.

  A front grill 11 having an opening through which outside air passes is attached to the front panel 10. A terminal block (not shown) to which power supply wiring for supplying power to the outdoor unit is connected is disposed on the side surface of the housing 1, and a terminal block cover 21 covering the terminal block is attached to the side panel 20. . Two long legs 60 that support the outdoor unit are attached to the lower surface of the housing 1 so as to extend in the short side direction of the housing 1. Bolt holes for fixing the leg 60 to a resin or concrete foundation block or the like are formed at both ends of the leg 60.

  Stored in the housing 1 are a compressor (not shown) for compressing the refrigerant, a heat exchanger 2 for exchanging heat between the outside air and the refrigerant, a blower 3 for supplying the outside air to the heat exchanger 2, and the like. Yes.

The heat exchanger 2 is a fin tube heat exchanger in which a heat transfer tube passes through, for example, a plurality of aluminum thin plate-like fins arranged side by side. It arrange | positions along the back side and the side surface side. The fin is erected in the vertical direction, and the heat transfer tube is configured to penetrate the fin in the horizontal direction.
The blower 3 is provided near the heat exchanger 2, and the outside air passes between the fins of the heat exchanger 2 by the rotation of the blower 3, and at that time, the refrigerant and the outside air flowing through the heat transfer tubes of the heat exchanger 2 are separated. Heat exchanged. The outside air after the heat exchange is exhausted from the front grill 11 to the outside of the housing 1.

When the outdoor unit of such an air conditioner is operated, for example, in the case of heating operation, the heat exchanger 2 functions as an evaporator, and the low-pressure gas refrigerant evaporated by absorbing heat from the outside air is compressed. Compressed by the machine, becomes high-pressure gas refrigerant, and is supplied to an indoor heat exchanger (not shown) of the indoor unit.
On the other hand, in the cooling operation, the heat exchanger 2 functions as a condenser, and the high-pressure gas refrigerant compressed by the compressor dissipates heat to the outside air and condenses, and the condensed liquid refrigerant is decompressed. Then, it is supplied to an indoor heat exchanger (not shown) of the indoor unit.

<Connection port (corresponding to the pipe connection port of the present invention)>
As shown in FIGS. 2 and 3, on the back side of the housing 1, each pipe connection port (gas pipe connection port 70, liquid connection port) for connecting a communication refrigerant pipe connecting the outdoor unit and the indoor unit to the outdoor unit is provided. A pipe connection port 71) is arranged. The gas pipe connection port 70 and the liquid pipe connection port 71 are attached to the back panel 30_1 of the housing 1. The gas pipe connection port 70 is connected to a gas pipe of the communication refrigerant pipe, and the liquid pipe connection port 71 is connected to a liquid pipe of the communication refrigerant pipe.

  The gas pipe connection port 70 is a joint for connecting the gas side pipe of the internal refrigerant circuit housed in the casing 1 of the outdoor unit to the gas pipe of the connecting refrigerant pipe. The gas pipe connection port 70 is a tubular member that is attached with its axial direction substantially aligned with the front-rear direction (depth direction) of the housing 1 and is made of, for example, brass (brass). The gas pipe connection port 70 includes a valve body having a hexagonal cross section perpendicular to the axial direction.

  The gas pipe connection port 70 is joined to the end of the gas side pipe of the internal refrigerant circuit housed in the housing 1 by brazing (metal and metal are joined by heat using brazing).

The liquid pipe connection port 71 is a joint for connecting the liquid side pipe of the internal refrigerant circuit housed in the casing 1 of the outdoor unit to the liquid pipe of the connecting refrigerant pipe. Like the gas pipe connection port 70, the liquid pipe connection port 71 is a tubular member that is attached with its axial direction substantially coincident with the front-rear direction (depth direction) of the housing 1, and is made of, for example, brass (brass). The The liquid pipe connection port 71 includes a valve body having a hexagonal cross section perpendicular to the axial direction.
The liquid pipe connection port 71 has substantially the same configuration as the gas pipe connection port 70, but the liquid side pipe of the internal refrigerant circuit has a smaller diameter than the gas side pipe, and thus the gas pipe connection port 70. The diameter is smaller than that.

  The liquid pipe connection port 71 is joined to the end of the liquid side pipe of the internal refrigerant circuit housed in the housing 1 by brazing (metal and metal are joined by heat using brazing).

<Rear panel>
Next, the structure of the back panel 30_1 will be described with reference to FIGS.
The back panel 30_1 is a panel that covers the back side of the housing 1 as shown in FIGS. 2 and 3, and is formed by sheet metal processing, for example. The back panel 30_1 is fixed to the heat exchanger 2 and connected to the side panel 20 with screws or the like.

FIG. 4 is a cross-sectional view looking down at the outdoor unit according to the first embodiment.
5 is a partially enlarged view of a pipe connection port portion in FIG. 4 of the outdoor unit according to Embodiment 1. FIG.
6 is a perspective view of a heat exchanger and a back panel of the outdoor unit according to Embodiment 1. FIG.
FIG. 7 is a perspective view of the outdoor unit heat exchanger and the back panel according to Embodiment 1 as viewed from an angle different from that in FIG. 6.
FIG. 8 is a plan view of the back panel of the outdoor unit according to Embodiment 1 and a side view of the four sides thereof.

Below the back panel 30_1, as shown in FIGS. 6 and 7 , a mounting bulge 31 (corresponding to the connection port mounting portion of the present invention) for mounting the gas pipe connection port 70 and the liquid pipe connection port 71 is formed. . The mounting bulging portion 31 has a shape protruding to the outer surface side of the housing 1. As shown in FIGS. 6 and 7, the mounting bulge 31 has mounting openings 32 and bolt holes 33 for mounting two pipe connection ports (gas pipe connection port 70 and liquid pipe connection port 71). Yes.

  The gas pipe connection port 70 and the liquid pipe connection port 71 are inserted into the mounting opening 32 in the axial direction, and the bolts 33 are tightened to fix the gas pipe connection port 70 and the liquid pipe connection port 71 to the rear panel 30_1. .

The back panel 30_1 is formed in a cross-sectional shape having a plurality of constituent surfaces as shown in FIG.
On one end side of the back panel 30_1, a heat exchanger holding piece 34 having a large number of holding holes 34a for holding the heat transfer tubes of the heat exchanger 2 is provided. A back surface portion 35 is formed so as to be orthogonal to one side of the heat exchanger holding piece 34 and form a back side outer shell of the housing 1.
Further, a side panel connection piece 37 having a screw hole 37a connected to the side panel 20 is provided on the other end side of the back panel 30_1.

And in the substantially center part of back panel 30_1, the concave surface part 36 in which the attachment bulging part 31 which attaches a pipe connection port was formed was dented from the back part 35 and the side panel connection piece 37 to the inner side of the housing | casing 1. It is formed with.
The concave surface portion 36 and the back surface portion 35, and the concave surface portion 36 and the side panel connection piece 37 are smoothly connected by the inclined surface 38, respectively.
The back surface portion 35, the concave surface portion 36, and the side panel connecting pieces 37 are arranged substantially in parallel.

  When the rear panel 30 </ b> _ <b> 1 having such a configuration is attached to the housing 1, the concave surface portion 36 is configured to be recessed inside the housing 1 from the periphery of the bottom plate panel 50, as shown in FIGS. With this configuration, the condensed water that has formed frost on the gas pipe connection port 70 and the liquid pipe connection port 71 flows down onto the bottom plate panel 50, and therefore does not fall to the lower part of the outdoor unit.

The heat exchanger holding piece 34 of the back panel 30_1 functions as an end plate of the heat exchanger 2 as shown in FIGS. 6 and 7, and is attached in contact with the end of the fin of the heat exchanger 2. Further, the heat transfer tube of the heat exchanger 2 is inserted into the holding hole 34a of the heat exchanger holding piece 34, and the back panel 30_1 and the heat exchanger 2 are fixed.
A gas pipe connection port 70 and a liquid pipe connection port 71 are attached to the mounting bulge portion 31 provided in the concave surface portion 36, and an internal refrigerant circuit housed in the machine chamber of the casing 1 housing the compressor. Are connected to each pipe connection port. That is, the internal refrigerant circuit in the machine room is fixed to the back panel 30_1 via each pipe connection port.

  The front ends 72 of the gas pipe connection port 70 and the liquid pipe connection port 71 are provided so as not to protrude outward from the front end position 60a of the leg portion 60 of the housing 1 in a top view of the outdoor unit shown in FIG. Yes. That is, the distal ends 72 of the gas pipe connection port 70 and the liquid pipe connection port 71 protrude outward (pertains to the first direction of the present invention) perpendicularly to the rear panel 30_1, but the distal ends of the legs 60 It is provided so as not to protrude outward from the virtual line 30a that passes through the position 60a and is parallel to the back panel 30_1 (the end 72 of each pipe connection port is located on the back panel 30_1 side from the virtual line 30a). .

<Effect>
In the outdoor unit according to Embodiment 1, since the heat exchanger 2 and the internal refrigerant circuit in the machine room containing the compressor and the like are fixed and relatively accurately positioned with respect to the rear panel 30_1, the pipe connection port The assembly accuracy of each member such as the surrounding internal refrigerant circuit and the heat exchanger 2 is improved, and operation noise due to contact of the refrigerant pipes and the like can be reduced.

Further, the gas pipe connection port 70 and the liquid pipe connection port 71 are arranged in the concave surface portion 36 of the back panel 30_1, and the distal end portions 72 thereof pass through the distal end position 60a of the leg portion 60 from the virtual line 30a parallel to the back panel 30_1. Since it is arranged so as not to protrude outward, the packaging size does not increase only by the protruding dimensions of each pipe connection port.
Furthermore, since the concave surface portion 36 of the back panel 30_1 is configured to be recessed inward of the housing 1 from the peripheral edge of the bottom plate panel 50 as described above, the gas pipe connection port 70 and the liquid pipe connection port 71 are frosted. Condensed water does not flow down on the bottom panel 50, and does not fall on the lower part of the outdoor unit.

Embodiment 2. FIG.
In Embodiment 1, an example of an outdoor unit in which the back panel 30_1 of the housing 1 is integrally formed is shown, but in Embodiment 2, an example of an outdoor unit configured by dividing the back panel 30_1 will be described.
<Configuration of outdoor unit and piping connection port>
Since the configuration of the outdoor unit and the pipe connection port is the same as that of the first embodiment, the description thereof is omitted.

<Rear panel>
Next, the structure of the back panel 30_2 will be described with reference to FIGS.
The back panel 30_2 is a panel that covers the back side of the housing 1 and is formed by, for example, sheet metal processing, as shown in FIGS. The back panel 30_2 is fixed to the heat exchanger 2 and connected to the side panel 20 with screws or the like.

FIG. 9 is a perspective view of the heat exchanger and the back panel of the outdoor unit according to Embodiment 2.
Figure 10 is a perspective view from a different angle than FIG. 9 a heat exchanger and back panel of the outdoor unit according to the second embodiment.
FIG. 11 is a perspective view of the back panel of the outdoor unit according to Embodiment 2. FIG.
FIG. 12 is a perspective view of the rear panel of the outdoor unit according to Embodiment 2 as viewed from an angle different from that in FIG. 11 .
Figure 13 is a perspective view from a different angle than FIG. 11 and 12 the back panel of the outdoor unit according to the second embodiment.
FIG. 14 is a plan view and a four-side side view of the rear panel of the outdoor unit according to the second embodiment.
FIG. 15 is a plan view of a heat exchanger holding piece of an outdoor unit according to Embodiment 2 and a four-side view thereof.

  Below the back panel 30_2, as in the first embodiment, as shown in FIGS. 9 and 10, the mounting bulge 31 for mounting the gas pipe connection port 70 and the liquid pipe connection port 71 (in the connection port mounting section of the present invention). Equivalent) is formed. The mounting bulging portion 31 has a shape protruding to the outer surface side of the housing 1. Further, the mounting bulge portion 31 has a mounting opening 32 and a bolt hole 33 for mounting two pipe connection ports (a gas pipe connection port 70 and a liquid pipe connection port 71).

  The gas pipe connection port 70 and the liquid pipe connection port 71 are inserted into the mounting opening 32 in the axial direction, and the bolts 33 are tightened to fix the gas pipe connection port 70 and the liquid pipe connection port 71 to the rear panel 30_2. .

The back panel 30_2 is formed in a cross-sectional shape having a plurality of constituent surfaces as shown in FIGS.
On one end side of the back panel 30_2, a back surface portion 35 that forms a back side outline of the housing 1 is provided in a flat plate shape. At the end of the back panel 30_2. A screw hole 35a for attaching the heat exchanger holding member 39 is opened.
Further, a side panel connection piece 37 is provided in a flat plate shape on the other end side of the back panel 30_2. A screw hole 37 a connected to the screw hole 20 a of the side panel 20 with a screw is opened at the end of the side panel connecting piece 37.

And the concave surface part 36 in which the attachment bulging part 31 which attaches a pipe connection port was formed in the approximate center part of the back panel 30_2 was dented from the back part 35 and the side panel connection piece 37 to the inner side of the housing | casing 1. It is formed with.
The concave surface portion 36 and the back surface portion 35, and the concave surface portion 36 and the side panel connection piece 37 are smoothly connected by the inclined surface 38, respectively.
The back surface portion 35, the concave surface portion 36, and the side panel connecting pieces 37 are arranged substantially in parallel.

<Heat exchanger holding member>
The heat exchanger holding member 39 is a flat plate-shaped member having a large number of holding holes 39a that hold the heat transfer tubes of the heat exchanger 2 as shown in FIGS. The heat exchanger holding member 39 is attached to one end side of the back surface portion 35 in a shape orthogonal to the back surface portion 35 of the back panel 30_2. At this time, screws are inserted into the screw holes 39b of the heat exchanger holding member 39 and the screw holes 35a of the back surface portion 35 to fix both members.

  When the back panel 30_2 having such a configuration is attached to the housing 1, the concave surface portion 36 is recessed inside the housing 1 from the periphery of the bottom plate panel 50 as in FIGS. 2 and 3 according to the first embodiment. Configured. With this configuration, the condensed water that has formed frost on the gas pipe connection port 70 and the liquid pipe connection port 71 flows down onto the bottom plate panel 50, and therefore does not fall to the lower part of the outdoor unit.

  In addition, a gas pipe connection port 70 and a liquid pipe connection port 71 are attached to the mounting bulge portion 31 provided in the concave surface portion 36 of the back panel 30_2, and are stored in the machine room of the casing 1 in which the compressor is stored. The internal refrigerant circuit is connected to each pipe connection port. That is, the internal refrigerant circuit in the machine room is fixed to the back panel 30_2 via each pipe connection port.

  The heat exchanger holding member 39 functions as an end plate of the heat exchanger 2 as shown in FIGS. 9 and 10 and is attached in contact with the end portions of the fins of the heat exchanger 2. Further, the heat transfer tube of the heat exchanger 2 is inserted into the holding hole 39 a of the heat exchanger holding member 39. Therefore, the heat exchanger holding member 39 is connected to the back surface portion 35 of the back panel 30_2, so that the heat exchanger 2 and the back panel 30_2 are integrated.

  Further, as in the first embodiment, the distal ends 72 of the gas pipe connection port 70 and the liquid pipe connection port 71 are located from the distal end position 60a of the leg portion 60 of the housing 1 in a top view of the outdoor unit shown in FIG. It is provided so as not to protrude outward. That is, the distal ends 72 of the gas pipe connection port 70 and the liquid pipe connection port 71 protrude outward (pertains to the first direction of the present invention) perpendicular to the rear panel 30_2, but the distal ends of the legs 60 It is provided so as not to protrude outward from the virtual line 30a that passes through the position 60a and is parallel to the back panel 30_2 (the end 72 of each pipe connection port is located on the back panel 30_2 side from the virtual line 30a). .

<Effect>
In the outdoor unit according to the second embodiment, in addition to the effects according to the first embodiment, the rear panel 30_2 and the heat exchanger holding member 39 are divided and configured as separate bodies. Therefore, the heat exchanger 2 and the rear panel 30_2 A degree of freedom is created in the process of connecting the two, and the manufacturing efficiency of the outdoor unit improves.

  DESCRIPTION OF SYMBOLS 1 Case, 2 Heat exchanger, 3 Blowers, 10 Front panel, 11 Front grille, 20 Side panel, 20a Screw hole, 21 Terminal block cover, 30_1 Rear panel, 30_2 Rear panel, 30a Virtual line, 31 Mounting bulge (Corresponding to connection port mounting portion of the present invention), 32 mounting opening, 33 bolt hole, 34 heat exchanger holding piece, 34a holding hole, 35 back surface portion, 35a screw hole, 36 concave surface portion, 37 side panel connecting piece, 37a Screw hole, 38 inclined surface, 39 heat exchanger holding member, 39a holding hole, 39b screw hole, 40 top panel, 50 bottom plate panel, 60 leg, 60a tip position, 70 gas pipe connection port (pipe connection of the present invention) 71) Liquid pipe connection port (corresponding to the pipe connection port of the present invention), 72 Tip.

Claims (6)

An outdoor unit including a housing having a front panel, a side panel, and a back panel, and a heat exchanger,
The rear panel includes a rear portion forming a connection port attachment portion connecting pipes port is attached, Rutotomoni a said heat exchanger heat exchanger is installed holding piece, the outer surface of said housing, said connection A concave surface portion on which the port mounting portion is formed,
The outdoor unit, wherein the concave surface portion is disposed on the inner side of the housing with respect to the back surface portion . 2. The outdoor unit according to claim 1, wherein the connection port mounting portion is formed to protrude to the outside of the housing with respect to the concave surface portion. The said back panel is provided with the said heat exchanger holding piece, the said back part, the said concave surface part, and the side panel connection piece which connects the said side panel, The Claim 1 or 2 characterized by the above-mentioned. Outdoor unit. The outdoor unit according to any one of claims 1 to 3, wherein the heat exchanger holding piece is configured as a separate member and attached to the back surface portion.   The outdoor unit according to any one of claims 1 to 4, wherein a holding hole through which the heat transfer tube of the heat exchanger is inserted opens in the heat exchanger holding piece. Legs that support the housing are attached to the bottom surface of the housing,
The tip part of the said piping connection port in the 1st direction perpendicular | vertical to the said back panel is comprised so that it may be located in the said back part side rather than the front-end | tip position of the said leg part. Outdoor unit.

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