JP6836114B2 - 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 means for supporting a closing valve for connecting a refrigerant pipe on the indoor unit side to a refrigerant pipe on the outdoor unit side in the outdoor unit.

A normal air conditioner for both cooling and heating is equipped with a refrigerant circuit including a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger. During cooling operation, the compressor → four-way valve → outdoor heat exchanger → Refrigerant flows from the expansion valve to the indoor heat exchanger to the compressor, and the outdoor heat exchanger acts as a condenser and the indoor heat exchanger acts as an evaporator.

On the other hand, during heating operation, the refrigerant flows from the compressor to the four-way valve to the indoor heat exchanger to the expansion valve to the outdoor heat exchanger to the compressor, and the indoor heat exchanger is the condenser and the outdoor heat exchanger is the outdoor heat exchanger. Acts as an evaporator.

Therefore, in both the cooling operation and the heating operation, in the above-mentioned refrigerant circuit, the refrigerant pipe connecting one end side of the outdoor heat exchanger including the expansion valve and one end side of the indoor heat exchanger is a liquid pipe. On the other hand, the refrigerant pipe connecting the other end side of the outdoor heat exchanger to which the compressor is connected via the four-way valve and the other end side of the indoor heat exchanger is a gas pipe. An air conditioner having two pipes, a liquid pipe and a gas pipe, is called a two-pipe type.

On the other hand, Patent Document 1 describes a multi-type air conditioner in which a cooling operation indoor unit and a heating operation indoor unit can be mixed at the same time. This air conditioner has three types of refrigerant pipes, a high-pressure gas pipe, a low-pressure gas pipe, and a liquid pipe, and by connecting these refrigerant pipes to each indoor unit via a cooling / heating switching unit, some indoor units The unit can be operated for cooling, and other indoor units can be operated for heating. An air conditioner having three pipes, a high-pressure gas pipe, a low-pressure gas pipe, and a liquid pipe, is called a three-tube type.

In any of the two-tube type and the three-tube type, a closing valve for connecting the refrigerant pipe from the indoor unit side is usually attached to the end of the refrigerant pipe on the outdoor unit side. The closing valve is closed before connecting the refrigerant pipe from the indoor unit side, and by switching to open after connecting, the refrigerant flows between the outdoor unit and the indoor unit. The closing valve is supported by a support plate provided at the pipe connecting portion in the housing, but the space of the piping connecting portion is narrow, and it is required to ensure the operability of the closing valve.

Therefore, in the invention described in Patent Document 2, the gas side closing valve and the liquid side closing valve are not arranged side by side in the support plate corresponding to the two-tube type, but are closed on the gas side by a support portion formed in a stepped shape. By supporting the valve and the liquid side closing valve at different height positions, the operation (working) space of each closing valve is secured. However, the support plate according to Patent Document 2 is exclusively for the 2-tube type and cannot be applied to the 3-tube type. For a 3-tube type air conditioner, it is necessary to use a support plate dedicated to the 3-tube type.

Japanese Unexamined Patent Publication No. 2005-300006 Japanese Unexamined Patent Publication No. 2013-11358

Therefore, an object of the present invention is to provide a support plate that can be applied to both a two-tube type and a three-tube type as a support plate that supports a closing valve of a refrigerant pipe in an outdoor unit of an air conditioner. is there.

In order to solve the above problems, the present invention relates to an outdoor unit of an air conditioner having a support plate in a housing and a closing valve supported by the support plate.
The support plate is provided with a base portion which is erected on the base panel of the housing, to the base unit, only one of the first attachment and the second attachment is fitted interchangeably, to the base portion Is provided with a first closing valve support portion, the first attachment is provided with a second closing valve support portion and a third closing valve support portion, and the second attachment is provided with the third closing valve support portion. The second closed valve support portion is not provided .

In the present invention, preferably, the base portion includes a leg portion, a bent portion inclined forward from the upper end of the leg portion, and a mount portion formed in a plate shape upward from the upper end of the bent portion. The mount portion is provided with the first closing valve support portion and the attachment attachment portion, and either the first attachment or the second attachment is attached to the attachment attachment portion.

Further, the support plate is arranged in the vicinity of the service panel that is detachably attached to the front surface of the housing, and when the first attachment is attached to the base portion, the second closure is viewed from the service panel side. The valve support portion may be arranged on the front side of the first closed valve support portion, and the third closed valve support portion may be arranged further on the front side of the second closed valve support portion. preferable.

More preferably, in the above-mentioned first Atatchimen bets, the third closing valve support portion is disposed below said second closure valve support portion, also, if the second attachment is attached to the base portion When viewed from the service panel side, the third closing valve support portion may be arranged below the first closing valve support portion.

According to the present invention, if the first attachment is attached to the base portion, the support plate has three closed valve support portions, that is, a first closed valve support portion, a second closed valve support portion, and a third closed valve support portion. Therefore, it is compatible with 3 pipes. On the other hand, if the second attachment is attached to the base part, the support plate will have two closing valve support parts, the first closing valve support part and the third closing valve support part, so that it is compatible with two pipes. , The cost can be reduced because both the 3-tube type and the 2-tube type can be supported simply by exchanging the attachment.

The perspective view which shows the state which the service panel of the outdoor unit of the air conditioner which concerns on one Embodiment of this invention is removed. The perspective view which shows the piping connection part in the outdoor unit housing. Top view of the pipe connection portion as viewed from above. Front view of the above pipe connection portion as viewed from the service panel side. The perspective view which shows the support plate (corresponding to 3 pipes) provided in the said pipe connection part. An exploded perspective view showing the support plate (corresponding to 3 pipes). The perspective view which shows the said support plate (corresponding to 2 pipes). The perspective view which shows the attachment for 2 pipes.

Next, an embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

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.

FIG. 2 is a three-tube type outdoor unit shown in a conventional example. 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. Further, the support plate 8 in this embodiment is for a 3-tube type, but as described later, it can be used for a 2-tube type by replacing the attachment as another embodiment.

With reference to FIGS. 2 to 6, 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 attachment 8B is for a 3-tube type.

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.

With the work opening 811, it is 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 and 3, 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 gas at one end (right side in FIG. 4). A first closing valve support portion 83 to which the closing 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. 6, 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 whose upper end is lower than the upper end 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. ing.

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 942.

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 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, as shown in FIG. 5, the second closing valve support 86 is located in front of the first closing valve support 83, and the third closing valve support 86 is located in front of the second closing valve support 86. The closing valve support portion 87 is located forward, the first closing valve support portion 83, the second closing valve support portion 86, and the third closing valve support portion 87 are arranged in a stepped manner, and further, the third closing valve support portion 87 is arranged in a stepped manner. The position of the portion 87 is arranged below the mounting position of the first 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, 7b, 7c is different. It may be changed arbitrarily according to the specifications.

Next, FIGS. 7 and 8 are views of the two-tube attachment 8C and the support plate 8 used in the two-tube outdoor unit shown in the conventional example. According to the present invention, by attaching a two-tube attachment 8C to the base portion 8A of the support plate 8 instead of the three-tube attachment 8B, the support plate 8 is made up of two pipes consisting of a gas pipe G1 and a liquid pipe LQ1. It can be applied to the air conditioner for switching between heating and cooling.

In the 2-tube air conditioner, the high-pressure gas pipe HG1 in the 3-tube air conditioner is simply the gas pipe G1, and the high-pressure gas closing valve 7a is also changed to the gas closing valve 7a accordingly.

This attachment 8C is realized by making the portion of the above-mentioned three-tube attachment 8B where the second closing valve support portion 86 is provided into a simple flat plate without a step portion 874 and providing only the third closing valve support portion 87. be able to.

According to this, as shown in FIG. 7, the gas closing valve 7d is fixed to the right side of the support plate 8, and the liquid closing valve 7c of the liquid pipe LQ1 is fixed to the left side of the support plate 8 in the vertical direction and the horizontal direction. Since they are arranged in a misaligned state, it is possible to secure a space required for operating a tool such as a spanner even in the case of a two-pipe type, and the operation workability is improved.

As described above, according to the present invention, when the first attachment is attached to the base portion, the support plate has three closures of the first closing valve support portion, the second closing valve support portion, and the third closing valve support portion. Since it has a valve support, it is compatible with 3 pipes. On the other hand, if the second attachment is attached to the base part, the support plate will have two closing valve support parts, the first closing valve support part and the third closing valve support part, so that it is compatible with two pipes. , It is possible to support both 3-tube type and 2-tube type just by exchanging the attachment, which reduces the cost.

1 Outdoor unit of air conditioner 2 Housing 20 Base panel 3 Heat exchanger 4 Blower 7 Piping connection 7a High pressure gas closure valve 7b Low pressure gas closure valve 7c Liquid closure valve 7d Gas closure valve 8 Support plate 8A Base 8B, 8C Attachment 81 Leg 810 Attachment mounting 811 Work opening 82 Mount 83 1st closing valve support 84 Support wall 86 2nd closing valve support 87 3rd closing valve support 9 Service panel HG1, HG2 High-pressure gas piping LG1 , LG2 low pressure gas piping G1, G2 gas piping LQ1, LQ2 liquid piping

Claims (5)

In an outdoor unit of an air conditioner having a support plate inside the housing and a closing valve supported by the support plate.
The support plate is provided with a base portion which is erected on the base panel of the housing, to the base unit, only one of the first attachment and the second attachment is fitted interchangeably,
The base portion is provided with a first closing valve support portion, the first attachment is provided with a second closing valve support portion and a third closing valve support portion, and the second attachment is provided with the third closing valve support portion. An outdoor unit of an air conditioner characterized in that a portion is provided and the second closing valve support portion is not provided. The base portion includes a leg portion, a bent portion that is inclined forward from the upper end of the leg portion, and a mount portion that is formed in a plate shape upward from the upper end of the bent portion. The first attachment portion and the attachment attachment portion are provided in the above-mentioned first attachment portion, and either the first attachment or the second attachment is attached to the attachment attachment portion according to claim 1. Outdoor unit of air conditioner. The support plate is arranged in the vicinity of a service panel that is detachably attached to the front surface of the housing, and when the first attachment is attached to the base portion, the second closing valve support is viewed from the service panel side. The claim is characterized in that the portion is arranged on the front side of the first closing valve support portion, and the third closing valve support portion is arranged on the front side of the second closing valve support portion. The outdoor unit of the air conditioner according to 1 or 2. At the said first Atatchimen bets, an outdoor unit of an air conditioner according to claim 3, wherein the third closing valve support part, characterized in that is disposed below the second closing valve support. The support plate is arranged in the vicinity of a service panel that is detachably attached to the front surface of the housing, and when the second attachment is attached to the base portion, the third closing valve support is viewed from the service panel side. The outdoor unit of the air conditioner according to claim 1 or 2, wherein the portion is arranged below the first closing valve support portion.

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