JP6836115B2 - Outdoor unit of air conditioner - Google Patents

Description

The present invention relates to an outdoor unit of an air conditioner, and more specifically to a technique for improving workability with respect to a refrigerant pipe in an outdoor unit housing.

For example, as described in Patent Document 1, in an air conditioner in which the outdoor unit and the indoor unit are separated, the refrigerant piping on the outdoor unit side and the refrigerant piping on the indoor unit side are provided in the outdoor unit housing. It is connected via the provided pipe connection part.

In many cases, a part of the housing of the outdoor unit is provided with a maintenance opening for an operator to approach the pipe connection from outside the housing, and the maintenance opening is usually a service panel. Is blocked by.

The pipe connection portion is provided with a support plate for supporting the closing valve for connecting the pipes, and the support plate is provided with the gas closing valve provided in the gas pipe on the outdoor unit side and the liquid pipe. Liquid closing valves are supported, but in supporting these closing valves on the support plate, a part of the gas pipe and / or liquid pipe (for example, a connection by welding) is behind the support plate when viewed from the maintenance opening. Placed in.

By the way, as an example of the procedure for assembling the outdoor unit of this type of air conditioner, first, a heat exchanger, a compressor, etc. are mounted on the bottom plate of the housing, and then the skeleton of the side panel, the top panel, etc. The member is attached. After that, the support plate to which the closing valve is attached is mounted on the bottom plate in the housing, and the pipes are connected by welding or the like.

However, as described above, since the pipe connection portion is arranged on the back side of the support plate when viewed from the maintenance opening, there is a problem that the support plate becomes an obstacle and it is difficult to perform the work (particularly welding process). ..

Japanese Unexamined Patent Publication No. 2013-11358

Therefore, an object of the present invention is an air conditioner that can easily connect a refrigerant pipe even if a support plate for supporting a closing valve is provided in a housing and a pipe connection portion is arranged on the back side of the support plate. Is to provide the outdoor unit of.

In order to solve the above-mentioned problems, the present invention includes a three-pipe type refrigerant pipe including a high-pressure gas pipe, a low-pressure gas pipe, and a liquid pipe in the housing, and a closing valve of the refrigerant pipe is provided in front of the welded portion of the refrigerant pipe. A support plate is provided to support the support plate, and a service panel that can be detachably attached to the front surface of the housing in front of the support plate is provided.
The support plate includes a base portion erected on the base panel of the housing, and the base portion includes a leg portion, a bent portion inclined forward from the upper end of the leg portion, and an upper portion from the upper end of the bent portion. It is provided with a mount portion formed in a plate shape toward the surface, the mount portion is provided with a first closing valve support portion and an attachment mounting portion, and the attachment mounting portion is provided with a second closing valve support portion. And an attachment with a third closure valve support is attached
The legs of the base portion are provided with a working opening in front of the welded portion of the refrigerant pipe , and the second closing valve support portion is the first closing valve when viewed from the service panel side. The third closing valve support portion is arranged closer to the front side than the support portion, the third closing valve support portion is further arranged closer to the front side than the second closing valve support portion, and the third closing valve support portion is the second closing portion. It is characterized in that it is arranged below the valve support portion.

According to the present invention, by providing a work opening in the support plate that supports the closing valve for connecting the refrigerant pipe, when the service panel is removed and the pipe connection work or the like is performed, the operator passes through the work opening. You can easily approach the back side of the support plate. Therefore, the welding work for the welded portion of the refrigerant pipe arranged on the back side of the support plate can be efficiently performed.

The perspective view which shows the state which removed the service panel of the outdoor unit of the air conditioner which concerns on one Embodiment of this invention. The perspective view which shows the pipe connection part of FIG. 1 enlarged. The front view which shows the said pipe connection part enlarged. Top view of the pipe connection portion as viewed from above. An exploded perspective view showing a support plate of the pipe connection portion.

Next, embodiments of the present invention will be described with reference to FIGS. 1 to 5, but the present invention is not limited thereto.

In this embodiment, the outdoor unit of the air conditioner is an outdoor unit of a multi-type air conditioner that operates simultaneously for cooling and heating, and a plurality of indoor units have a cooling / heating switching unit for one or a plurality of outdoor units. It is provided with a refrigerant circuit that is connected in parallel via the air conditioner and can simultaneously mix an indoor unit for cooling operation and an indoor unit for heating operation.

As shown in FIG. 1, the outdoor unit 1 of this air conditioner has a rectangular parallelepiped housing 2, and the inside of the housing 2 has a heat exchanger 3, a compressor, or the like (not shown). And the blower room FC having the blower 4. The machine room MC is arranged at the lower part in the housing 2, and the blower room FC is arranged above the machine room MC.

In the following description, the left-right, front-back, and up-down directions of the housing 2 are indicated along the coordinate axes shown in FIG. The direction of each component will also be described along the coordinate axes shown in FIG. The housing 2 has a rectangular parallelepiped shape that is horizontally long in the left-right direction.

As a basic structure, the housing 2 has a rectangular base panel 20 installed on the surface to be installed, a left side panel 21L erected on the left end of the base panel 20, and a right end of the base panel 20. The right side panel 21R to be erected, the front beam 22F laid parallel to the base panel 20 between the front end of the left side panel 21L and the front end of the right side panel 21R, and the rear end and right of the left side panel 21L. A rear beam (not shown) is provided between the side panel 21R and the rear end in parallel with the base panel 20.

The front beam 22F and the rear beam are arranged along the boundary between the machine room MC and the blower room FC of the housing 2, and the front beam 22F and the rear beam are parallel to each other on the same plane and parallel to the base panel 20. It is arranged so as to be. A bridge girder-shaped motor bracket (not shown) is bridged to the front beam 22F and the rear beam, and the blower 4 is mounted on the motor bracket.

A top panel 23 is hung between the upper end of the left side panel 21L and the upper end of the right side panel 21R on the upper surface of the housing 2 (the upper surface of the blower chamber MC). An air outlet 11 of the blower 4 is formed in the center of the top panel 23.

A front pillar 24 that supports an intermediate portion of the front beam 22F is provided between the front end of the base panel 20 and the front beam 22F. The front pillar 24 is made of, for example, one steel plate pressed and molded, and is formed in a vertically long rectangular shape.

In this embodiment, the heat exchanger 3 is arranged in a U shape in the housing 2, and the front pillar 24 protects a part of the front portion of the heat exchanger 3 while protecting the front surface of the heat exchanger 3. It is provided with a grill portion 241 as a front suction grill that exposes the side to the outside of the housing. In this embodiment, the grill portion 241 has eight through holes cut out in a square shape.

Further, a front opening 2A for maintenance is provided between the left side panel 21L of the housing 2 and the front pillar 24. A service panel 9 that closes the front opening 2A is detachably attached to the front opening 2A.

The service panel 9 has two panels, an upper service panel 91 that opens and closes the upper half of the front opening 2A, and a lower service panel 92 that opens and closes the lower half.

A center beam 25 on which the electrical component box 26 is placed is hung in parallel with the base panel 20 between the front end side of the left side panel 21L and the front pillar 24. Of the front opening 2A, the opening on the upper side of the center beam 25 is detachably screwed with the upper service panel 91 in order to maintain the electrical component box 26.

Further, below the center beam 25, the machine room MC is provided with a pipe connection portion 7 for connecting the refrigerant pipe from the indoor unit side to the refrigerant pipe on the outdoor unit side. The lower service panel 92 is detachably screwed in order to connect and maintain the refrigerant pipe of the pipe connection portion 7.

With reference to FIG. 2, the refrigerant pipe on the outdoor unit side includes three pipes, a high-pressure gas pipe HG1, a low-pressure gas pipe LG1, and a liquid pipe LQ1, and the end of the high-pressure gas pipe HG1 is bent forward to provide high pressure. It is connected to the gas shutoff valve 7a, the end of the low pressure gas pipe LG1 is bent forward and connected to the low pressure gas shutoff valve 7b, and the end of the liquid pipe LQ1 is bent forward and connected to the liquid shutoff valve 7c.

A high-pressure gas closing valve 7a, a low-pressure gas closing valve 7b, and a liquid closing valve 7c are arranged in the pipe connection portion 7, and each of these closing valves 7a, 7b, and 7c is supported by the support plate 8.

The high-pressure gas closing valve 7a, the low-pressure gas closing valve 7b, and the liquid closing valve 7c are provided with valve cases 71a, 71b, and 71c having substantially the same structure, although they are different in size.

With reference to FIGS. 3 and 4, the valve cases 71a, 71b, 71c have service ports 72a, 72b, 72c for filling the refrigerant in the upper part, and high-pressure gas pipes HG1 and low-pressure gas pipes LG1 in the rear part. , Suction ports 73a, 73b, 73c connecting the liquid pipe LQ1, high-pressure gas pipe HG2 of the indoor unit, low-pressure gas pipe LG2, and discharge ports 74a, 74b, 74c connecting the liquid pipe LQ2 at the bottom, closed at the front. Operation ports 75a, 75b, 75c for opening and closing the valve and mounting flanges 76a, 76b, 76c are provided on the right side and the left side, respectively.

The operation ports 75a, 75b, 75c are arranged so as to face the front opening 2A side, and operation nuts 77a, 77b, 77c for opening and closing the ports are attached to the operation ports 75a, 75b, 75c.

A high-pressure gas pipe HG2 from the indoor unit side is connected to the discharge port 74a of the high-pressure gas closing valve 7a. A low-pressure gas pipe LG2 from the indoor unit side is connected to the discharge port 74b of the low-pressure gas closing valve 7b. Further, a liquid pipe LQ2 from the indoor unit side is connected to the discharge port 74c of the liquid shutoff valve 7c. In the drawing, only a part of the high-pressure gas pipe HG2, the low-pressure gas pipe LG2, and the liquid pipe LQ2 is drawn, and the pipe to the indoor unit side is omitted.

The high-pressure gas closing valve 7a, the low-pressure gas closing valve 7b, and the liquid closing valve 7c are supported by the support plate 8, but if the high-pressure gas closing valve 7a, the low-pressure gas closing valve 7b, and the liquid closing valve 7c are supported at the same height, The operability of the operation ports 75a, 75b, 75c is not good because the space between the operation ports 75a, 75b, 75c for opening and closing the closing valve is narrowed and the space required for operating a tool such as a spanner cannot be secured.

Therefore, the high-pressure gas closing valve 7a, the low-pressure gas closing valve 7b, and the liquid closing valve 7c are displaced on the support plate 8 in the vertical direction and the front-rear direction to secure the space required for operating a tool such as a spanner. The operability of the operation ports 75a, 75b, 75c is improved.

With reference to FIGS. 2 to 5, the support plate 8 is formed separately from the base portion 8A erected on the base panel 20 of the housing 2 and the base portion 8A, and can be attached to and detached from the base portion 8A. It has an attachment 8B to be attached.

The base portion 8A is formed by bending one metal plate, and is parallel to the base panel 20 and screwed to the base panel 20. The bottom plate portion 80 and the bottom plate portion 80 are substantially perpendicular to the front side. It includes a leg portion 81 to be erected and a mount portion 82 integrally formed at the upper end of the leg portion 81.

A bent portion 821 whose upper end portion is inclined forward is provided between the leg portion 81 and the mount portion 82, and the mounted portion 82 is forward of the leg portion 81 by the bent portion 821 (front opening 2A). It is formed so as to overhang on the side).

A work opening 811 is provided in the center of the leg 81. The working opening 811 is provided so as to be aligned with the joint 331 of the connecting pipe 33 described later.

In this embodiment, the working opening 811 is formed by punching a central portion of the leg 81 by press working, and reinforcing ribs 812 are formed by being bent rearward at a right angle on each side thereof. There is.

The presence of the work opening 811 makes it possible to easily connect the refrigerant pipes located on the back side of the support plate 8 when viewed from the lower service panel 92 side.

With reference to FIGS. 2 to 4, the support plate 8 is arranged in front of the end portion 31 of the heat exchanger 3 when viewed from the lower service panel 92 side (front opening 2A side), and the support plate 8 is arranged. A connecting pipe 33 connected to a diversion pipe 34 having a plurality of heat transfer pipes 32 drawn from the end 31 of the heat exchanger 3 is routed on the back side of the heat exchanger 3. The other side of the connecting pipe is connected to a four-way valve (not shown).

The diversion pipe 34 and the connecting pipe 33 are connected by welding the joint 331. In the welding work, the support plate 8 is provided with a work opening 811 aligned with the joint 331, and the welding torch or the like can be brought close to the pipe joint 331 through the work opening 811 for welding. The work can be performed even when the support plate 8 is in front of the joint 331.

Reinforcing flanges 815 and 814 are provided on the left and right ends of the base portion 8A, respectively. Each reinforcing flange 815,814 is formed by bending the left and right ends of the base portion 8A at right angles to the rear and continuously forming the base portion 8A from the lower end to the upper end.

The mount portion 82 is formed in a plate shape upward from the upper end 821a of the bent portion 821 with the same width as the bent portion 821, and the mount portion 82 has a high pressure at one end (right side in FIG. 4). A first shutoff valve support portion 83 to which the gas shutoff valve 7a is attached is provided.

The first closing valve support portion 83 has a flat mounting surface 831 to which the mounting flange 76a of the high pressure gas closing valve 7a is screwed, and a U that supports the suction port 73a of the high pressure gas closing valve 7a at the upper end of the mounting surface 831. A notch groove 832 notched in a shape is provided. Further, the mounting surface 831 is provided with screwing holes 833 and 833 for screwing the mounting flange 76a on both the left and right sides of the notch groove 832.

As shown in FIG. 5, the left half side of the mount portion 82 is an attachment mounting portion 810. The attachment mounting portion 810 has a curtain plate 810a having a height lower than that of the mounting surface 831, and the central portion of the curtain plate 810a is cut out to near the bent portion 821. A support wall 84 for attaching the attachment 8B is provided at the boundary with the first closing valve support portion 83.

The support wall 84 is formed by bending the mount portion 82 along the left end side of the first closing valve support portion 83 at a substantially right angle to the front side, and a mounting flange 841 to which the attachment 8B is screwed is provided in the front. Has been done.

The mounting flange 841 is bent at a substantially right angle to the side opposite to the first closing valve support portion 83 (left side in FIG. 6) so that the tip of the support wall 84 is parallel to the mount portion 82. The mounting flange 841 is provided with a screw hole 842 for screwing the attachment 8B.

The attachment 8B is made by pressing a single metal plate like the base portion 8A, and has a second closing valve support portion 86 that supports the low-pressure gas closing valve 7b and a third closing valve that supports the liquid closing valve 7c. It is provided with a support portion 87.

The second closing valve support portion 86 has a flat mounting surface 861 to which the mounting flange 76b of the low pressure gas closing valve 7b is screwed, and the suction port 73b of the low pressure gas closing valve 7b is on the upper end side of the mounting surface 861. A U-shaped notched groove 862 is provided to support the. Screwing holes 863 and 863 for screwing the mounting flange 76b are provided on both the left and right sides of the notch groove 862 of the mounting surface 861.

The mounting surface 861 is further provided with a screw hole 864 for screwing the attachment 8B to the mounting flange 841 of the base portion 8A.

A guide rib 865 that abuts along the support wall 84 is provided on the right end side of the second closing valve support portion 86. The guide rib 865 is formed by bending a part of the right end side of the second closing valve support portion 86 rearward at a substantially right angle, the guide rib 865 is arranged along the support wall 84, and the mounting flange 841 supports the second closing valve. The attachment 8B is attached to the base portion 8A by abutting the back surface of the portion 86 and screwing the screw fixing hole 864 and the screw fixing hole 842.

On the left end side of the second closing valve support portion 86, a step portion 874 for providing a step in the front-rear direction with the third closing valve support portion 87 is provided. The step portion 874 is formed by bending the left end side of the second closing valve support portion 86 toward the front at a substantially right angle.

According to this, the step portion 874 forms a step in the front-rear direction between the second closing valve support portion 86 and the third closing valve support portion 87. The step portion 874 is continuously formed above and below the left end of the second closing valve support portion 86, and is formed along the right end of the third closing valve support portion 87.

The third closing valve support portion 87 has a flat mounting surface 871 to which the mounting flange 76c of the liquid closing valve 7c is screwed, and supports the suction port 73c of the liquid closing valve 7c on the upper end side of the mounting surface 871. A U-shaped notched groove 872 is provided. The left and right sides of the cutout groove 872 in the mounting surface 87 1, screwed holes 873,873 for screwing the mounting flange 76c is provided.

In this embodiment, the upper end of the mounting surface 871 is formed at a position lower than the upper end of the second closing valve support portion 86. According to this, the positions of the second closing valve support portion 86 and the third closing valve support portion 87 in the vertical direction are displaced, so that the mounting positions of the low pressure gas pipe 7b and the liquid closing valve 7c are displaced vertically and back and forth. A work space can be secured for each.

At the left end of the third closing valve support portion 87, a guide rib 875 that abuts along the reinforcing flange 814 of the base portion 8A is provided. The guide rib 875 is formed by bending the left end side of the third closing valve support portion 87 toward the rear side at a substantially right angle, and a screw hole 876 for screwing is provided in a part thereof. The attachment 8B is firmly fixed to the base portion 8A by bringing the guide rib 875 into contact with the reinforcing flange 814 and screwing it.

According to the support plate 8, the second closing valve support 86 is located forward with respect to the first closing valve support 83, and the third closing valve support 87 is forward with respect to the second closing valve support 86. The first closed valve support portion 83, the second closed valve support portion 86, and the third closed valve support portion 87 are arranged in a stepped manner, and the position of the third closed valve support portion 87 is the third. 1 It is arranged below the mounting position of the closing valve support portion 83 and the second closing valve support portion 86.

As a result, the mounting positions of the closing valves 7a and 7b are displaced in the front-rear direction, and the mounting positions of the closing valves 7c are in front of the closing valves 7a and 7b and below the closing valves 7a and 7b. It is possible to secure a wide work space in which the operation nuts 77a, 77b, 77c of the 75a, 75b, 75c can be rotated by a spanner.

In the above-described embodiment, the support plate 8 is arranged in the order of the high-pressure gas closing valve 7a, the low-pressure gas closing valve 7b, and the liquid closing valve 7c from the right, but the arrangement of the closing valves 7a to 7c is according to the specifications. It may be changed arbitrarily accordingly.

As described above, according to the present invention, the support plate 8 is provided with the work opening 811 penetrating from the front surface to the back surface, so that the connection portion of the refrigerant pipe arranged on the back side of the support plate 8 is provided. Welding work and the like can be easily performed through the work opening 811.

1 Outdoor unit of air conditioner 2 Housing 3 Heat exchanger 31 End 32 Heat transfer pipe 33 Connection pipe 331 Joint 34 Divergence pipe 4 Blower 5 Electrical equipment box 7 Piping connection 7a High pressure gas closure valve 7b Low pressure gas closure valve 7c Liquid Closing valve 8 Support plate 8A Base part 8B Attachment 810 Attachment mounting part 81 Leg 811 Working opening 82 Mount part 83 1st closing valve support 84 Support wall 86 2nd closing valve support 87 3rd closing valve support 9 Service panel 91 Upper service panel 92 Lower service panel HG1, HG2 High-pressure gas piping LG1, LG2 Low-pressure gas piping LQ1, LQ2 Liquid piping

Claims (1)

A three-pipe type refrigerant pipe including a high-pressure gas pipe, a low-pressure gas pipe, and a liquid pipe is provided in the housing, and a support plate for supporting the closing valve of the refrigerant pipe is provided in front of the welded portion of the refrigerant pipe, and the support plate is provided. Equipped with a service panel that can be detachably attached to the front of the above housing in front of
The support plate includes a base portion erected on the base panel of the housing, and the base portion includes a leg portion, a bent portion inclined forward from the upper end of the leg portion, and an upper portion from the upper end of the bent portion. It is provided with a mount portion formed in a plate shape toward the surface, the mount portion is provided with a first closing valve support portion and an attachment mounting portion, and the attachment mounting portion is provided with a second closing valve support portion. And an attachment with a third closure valve support is attached
The legs of the base portion are provided with a working opening in front of the welded portion of the refrigerant pipe , and the second closing valve support portion is the first closing valve when viewed from the service panel side. The third closing valve support portion is arranged closer to the front side than the support portion, the third closing valve support portion is further arranged closer to the front side than the second closing valve support portion, and the third closing valve support portion is the second closing portion. An outdoor unit of an air conditioner characterized in that it is located below the valve support.

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