JP2008032254A - Heat exchange unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchange unit allowing an electric component box to be easily attached and detached with a simple structure, and further reducing the height of a unit main body by dispensing with a space for sliding the electric component box. <P>SOLUTION: In this heat exchange unit 1 comprising the unit body 20 receiving a compressor 18 and a heat exchanger 21, and provided with supports 92, 93 for mounting the electric component box 11 on a side face of the unit body 20 opposed to the compressor 18, for detachably mounting the electric component box 11 to the supports 92, 93, contact flange portions 87, 88 kept into contact with mounting flange portions 61, 62 of the electric component box 11 are formed to the supports 92, 93, supporting portions 96, 97 supporting lower ends of the mounting flange portions 61, 62 of the electric component box 11 are formed on lower ends of the contact flange portions 87, 88, and claw portions 94 for locking an upper part of the mounting flange portion 61 of the electric component box 11 are formed on upper parts of the contact flange portions 87, 88. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat exchange unit in which an electrical box is detachably provided.

Conventionally, there has been known a heat exchange unit that includes a unit body that houses a compressor and a heat exchanger, and has a support column that attaches an electrical box to the side of the unit body that faces the compressor. It has been.
In such a heat exchange unit, a compressor or the like is disposed on the back side of the electrical box, and the electrical box is removed during maintenance of the heat exchange unit or the like. For this reason, the electrical box is fixed to the column of the unit body with screws or the like. At this time, in order to prevent the electrical box from falling down, a dart hole or slot is provided in the electrical box, and the dart hole or slot is hooked on the column to temporarily fix the electrical box to the unit body. It was generally done.

In addition, in order to facilitate maintenance work, a tongue piece projecting upward is provided on the support column, and the electrical box is placed on the tongue piece from above so as to surround the tongue piece at a position corresponding to the tongue piece. There has also been proposed a frame member that is hooked and an electrical box is pivotally attached to a unit body like a door around a tongue piece (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 8-21643

  However, in a heat exchange unit in which an electrical box is attached to a column with a dart hole or the like, the electrical box must be slid upward when attaching or detaching, so an electrical box is placed between the top plate of the unit body and the electrical box. It was necessary to secure a space for sliding.

  In addition, in a heat exchange unit in which the electrical box is pivotally attached to the unit body, it is necessary to use a hinge or the like in order to prevent the electrical box from being detached from the unit body when the electrical box is rotated. There is a problem that the structure becomes complicated. In addition, since the frame member of the electrical box is attached to the tongue of the unit body from above, it is attached between the top panel of the unit body and the electrical box, just like when the electrical box is attached with a dart hole. It was necessary to secure a space for sliding the electrical box.

In these heat exchange units, it is necessary to secure a space for sliding the electrical box between the upper surface plate of the electrical box and the electrical box, so it is difficult to keep the height of the unit body low. There was a problem.
Furthermore, when the mounting position of the electrical box is too low and the worker is working in an unreasonable posture, or when the electrical box is heavy, it is difficult to lift the electrical box upward and hook it on the column. was there.

  The present invention has been made in view of the above-described circumstances, and with a simple structure, the electrical box can be easily attached and detached, and furthermore, by not providing a space for sliding the electrical box, It aims at providing the heat exchange unit which can hold down the height of a unit main part low.

  The present invention includes a unit main body that houses a compressor and a heat exchanger, and includes a column that attaches an electrical box to a side surface of the unit body that faces the compressor. In the replacement unit, a contact flange portion that contacts the mounting flange portion of the electrical box is formed on the support column, and a support portion that supports the lower end of the mounting flange portion of the electrical box is formed at the lower end of the contact flange portion. And a claw portion for locking the upper portion of the mounting flange portion of the electrical box is provided on the upper portion of the abutting flange portion.

  In this case, the dimension between the upper end of the contact flange part and the lower end of the contact flange part is substantially the same as the dimension between the upper end of the attachment flange part and the lower end of the attachment flange part. The mounting flange portion may be disposed between the claw portion and the mounting flange portion.

  Further, in this case, the claw portion is formed by bending the upper end of the contact flange portion into a U-shape opened downward on the side where the mounting flange portion is disposed, and the support portion is A part of the contact flange portion may be formed to be bent in an L shape on the side where the mounting flange portion is disposed.

  Furthermore, in this case, when attaching the electrical box, with the upper end of the mounting flange portion inserted from below between the claw portion and the contact flange portion, the upper end of the mounting flange portion is used as a fulcrum. The lower part of the electrical box may be rotated so that the lower end of the mounting flange part is supported by the support part.

  According to the present invention, an abutting flange portion that abuts the mounting flange portion of the electrical box on the side of the unit body is formed on the side of the unit body, and the mounting flange portion of the electrical box is formed at the lower end of the abutting flange portion. Since a support portion for supporting the lower end of the electric box is provided and a claw portion for locking the upper portion of the mounting flange portion of the electric box is provided at the upper end of the contact flange portion, the electric component is provided between the electric box and the upper surface plate of the unit body. Even if there is no space for sliding the electrical box when attaching or detaching the box, the electrical box can be temporarily fixed, so the electrical box can be easily attached and detached with a simple structure. Furthermore, the height of the unit body can be kept low by not providing a space for sliding the electrical box.

  Hereinafter, a heat exchange unit 1 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a state in which a heat exchange unit 1 according to an embodiment of the present invention is viewed obliquely from above. Note that the front and rear, top and bottom, and left and right directions used in the following description refer to directions seen from the front plate 7 side in FIG.

  As shown in FIG. 1, the heat exchange unit 1 has a substantially prismatic shape having a longitudinal direction in the front-rear direction, and the unit body 20 that is an outer portion of the heat exchange unit 1 is connected to the top plate 2, the bottom plate 3, The left side plate 4, the right side plate 5, the rear plate 6, and the front plate 7 are configured. The front plate 7 is attached with a fastening member such as a screw so as to be detachable during maintenance. In addition, since the heat exchange unit 1 is used in an environment where it is exposed to rainwater outdoors, the heat exchanger unit 1 is assembled so that the portion where the plates are combined has a watertight structure.

As shown in FIG. 1, two step surfaces 12 and 13 that are recessed toward the rear plate 6 and are substantially parallel to the surface of the front plate 7 are formed on the right side of the surface to which the front plate 7 is attached. Yes. The step surfaces 12 and 13 extend in the vertical direction of the heat exchange unit 1, and various pipes exchange heat from the step surface 13 on the back side of the two step surfaces 12 and 13. Projecting from the inside of the unit 1 toward the outside. Specifically, this pipe includes a water supply pipe 14a for taking in cooling water for a water heat source and a cooling water drain pipe 14b, a high pressure gas pipe 15a as a refrigerant pipe, a low pressure gas pipe 15b, a liquid pipe 15c, and oil. This is a tube 15d.
Further, a lid 16 is detachably attached to the left side of the drain pipe 14b by a fastening member.

FIG. 2 is a perspective view in which the top plate 2, the right side plate 5, the front plate 7, and the lid portion 16 are omitted from the state of FIG.
Inside the heat exchange unit 1, an electrical box 11 disposed on the rear side of the front plate 7, two compressors 18A and 18B disposed on the rear side of the electrical box, and an electromagnetic four-way valve 19 ( 3), a water-cooled outdoor heat exchanger 21, an accumulator 22, an oil separator 23, various solenoid valves attached at a higher position than the outdoor expansion valve 24, a receiver tank 25 (see FIG. 3), and the like. . These are connected by a refrigerant pipe to form a refrigerant circuit. Further, when the front plate 7 of the heat exchange unit 1 is removed, the substrate 8, the terminal block 9, the relay 10, and the like attached inside the electrical box 11 can be maintained from the outside of the heat exchange unit 1.

  Each of the outdoor heat exchangers 21 is provided with a cooling water circulation pipe 35. A part of the cooling water circulation pipe 35 is constituted by a double-structure pipe through which water flows outside the refrigerant pipe, and is constituted by four cooling water circulation pipes 35a to 35d (multi-pass structure). Heat exchange with the refrigerant is possible in four regions. As described above, the water flowing outside the refrigerant pipe flows in from the water supply pipe 14a and out of the drain pipe 14b.

FIG. 3 is a refrigerant circuit diagram of an air conditioner to which the heat exchange unit 1 is applied.
The air conditioner 31 includes a plurality (two) of heat exchange units 1A, 1B and a plurality (two) of indoor units 30A, 30B. In the air conditioner 31, the refrigerant connection pipe 15 that connects the heat exchange units 1A and 1B and the indoor units 30A and 30B includes the above-described high-pressure gas pipe 15a, low-pressure gas pipe 15b, and liquid pipe 15c. The units 30A and 30B can be simultaneously operated for cooling or heating, or the cooling operation (including dry operation) and the heating operation can be mixed.

The indoor unit 30A includes an indoor heat exchanger (use side heat exchanger) 40 and an expansion valve (decompression device) 41, and one end of the indoor heat exchanger 40 is liquid via the indoor expansion valve 41. A pipe is connected to the pipe 15c. A branch pipe 42 is connected to the other end of the indoor heat exchanger 40. The branch pipe 42 branches into a high-pressure gas branch pipe 42A and a low-pressure gas branch pipe 42B. The first on-off valve (for example, electromagnetic valve) 43 is connected to the high-pressure gas pipe 15a, and the other low-pressure gas branch pipe 42B is connected to the low-pressure gas pipe 15b via the second on-off valve (for example, electromagnetic valve) 44. Has been. The indoor unit 30A is provided with a temperature sensor or the like for detecting the inlet / outlet temperature or room temperature of the outdoor heat exchanger 21, and an indoor control device for controlling the indoor unit 30A by inputting the detection results of these sensors. (Not shown).
Since the indoor unit 30B has substantially the same configuration as the indoor unit 30A, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  The heat exchange unit 1A includes a variable capacity compressor (DC inverter compressor) 18A, a constant capacity compressor (AC compressor) 18B, an oil separator 23, and an outdoor heat exchanger (heat source side heat exchanger). ) 21, an outdoor expansion valve 24, a receiver tank 25, and the like. Hereinafter, the compressors 18 </ b> A and 18 </ b> B are referred to as the compressor 18 when it is not necessary to distinguish between them.

  Each compressor 18 is connected in parallel, and a suction pipe 71 commonly connected to a suction port of each compressor 18 is connected to the low-pressure gas pipe 15 b via the accumulator 22. The discharge pipe 72 connected to the discharge port of each compressor 18 extends through the oil separator 23 and branches into two, and one refrigerant discharge branch pipe 72A is connected to the high-pressure gas pipe 15a, and the other A refrigerant discharge branch pipe 72 </ b> B is connected to the outdoor heat exchanger 21.

Here, the refrigerant discharge branch pipe 72B is provided with a switching valve 73. When the switching valve 73 is opened, the refrigerant discharged from the compressor 18 is supplied to the outdoor heat exchanger 21.
Between the switching valve 73 and the outdoor heat exchanger 21, there is provided a four-way valve 74 in which one port A is blocked. The four-way valve 74 is connected to one end of the outdoor heat exchanger 21 and the switching valve 73. Or a pipe 75 connected to one end of the outdoor heat exchanger 21 and a suction pipe 71 of the compressor 18.

  The other end of the outdoor heat exchanger 21 is connected to the liquid pipe 15c through an outdoor expansion valve 24, a receiver tank 25, and an auxiliary cooling circuit 76 for adjusting the flow rate of the refrigerant supplied to the outdoor heat exchanger 21. Yes. The auxiliary cooling circuit 76 auxiliaryly cools the liquid refrigerant flowing through the refrigerant pipe 77 that connects the receiver tank 25 and the liquid pipe 15c, and more specifically, the liquid between the receiver tank 25 and the liquid pipe 15c. A double pipe heat exchanger in which a part of the refrigerant pipe 77 through which the refrigerant passes and a part of the branch pipe 79 through which the refrigerant branched from the refrigerant pipe 77 and passes through the expansion valve 78 are configured by a double pipe. It is. A branch pipe 79 through which the refrigerant that has passed through the expansion valve 78 passes is connected to a suction pipe 71 of the compressor 18 via a refrigerant pipe 80 connected to the auxiliary cooling circuit 76, and the refrigerant that has passed through the branch pipes 79 and 80 is compressed. It is returned to the suction port of the machine 18.

  The oil separator 23 is connected to a refrigerant return pipe 81 for returning the oil stored in the oil separator 23 to the refrigerant suction pipe of the compressor 18. For example, when the amount of oil stored in the oil separator 23 is a predetermined amount or more In addition, the surplus oil amount is returned to the refrigerant suction pipe of the compressor 18 through the refrigerant return pipe 81. The refrigerant return pipe 81 is provided with a capillary tube 36, an oil branch pipe 81A that connects the refrigerant return pipe 81 and an oil balance pipe 82 described later, and a switching valve 84 is provided in the oil branch pipe 81A. It is installed.

  The oil separator 23 is connected to an oil balance pipe 82 for connecting the oil separator 23 and the refrigerant return pipe 81 of the other heat exchange unit 1B. A capillary tube 37, a balance valve 85, and a check valve 86 are connected in series to the oil balance pipe 82, and the tip of the oil balance pipe 82 is used to maintain the balance of the oil amount between the heat exchange unit 1A and the heat exchange unit 1B. Connected to the oil pipe 15d.

The heat exchange unit 1A includes temperature sensors SO1 and SO2 that detect the inlet / outlet temperature of the outdoor heat exchanger 21, a pressure sensor SA1 that detects the suction pressure of the compressor 18, and pressure sensors SB2 and SB3 that detect the discharge pressure of the compressor 18. The outdoor control apparatus 100 etc. which input the detection result of various sensors, such as these, a non-return valve, and various sensors, and control the heat exchange unit 1A whole are provided.
The outdoor control device 100 is disposed in each of the compressor 18A and the compressor 18B and is connected to an oil sensor (not shown) that detects the oil amount in each compressor, and balances according to the oil amount detected by these oil sensors. The valve 85, the bypass valve 45, and the switching valve 84 are controlled to be opened and closed. In addition, since the heat exchange unit 1B has the same configuration as the heat exchange unit 1A, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  The outdoor control devices 100 of the heat exchange units 1A and 1B are connected to each other by a control wiring (not shown) so as to communicate with each other. When the air conditioner 31 is in operation, one of the heat exchange units 1A, 1B functions as a master unit, and the outdoor control device 100 of the master unit receives a user instruction input via a remote controller (not shown). Is communicated with other outdoor control devices 100 and indoor control devices to control the operation of the entire air conditioner 31.

In the case where all the indoor units 30A and 30B are simultaneously cooled, the switching valve 73 is opened and the four-way valve 74 is controlled to be switched in each heat exchange unit 1A and 1B, and the first on-off valve is switched in each indoor unit 30A and 30B. 43 closes and the second on-off valve 44 opens. In this case, the refrigerant discharged from the compressor 18 is supplied to the outdoor heat exchanger 21 via the oil separator 23, where it dissipates and condenses to become liquid refrigerant, and the liquid pipe 15c passes through the receiver tank 25 and the auxiliary cooling circuit 76. To be supplied. In the indoor units 30A and 30B, the liquid refrigerant is supplied to the indoor heat exchanger 40 via the liquid pipe 15c via the indoor expansion valve 41, where it absorbs heat and evaporates to become a low-temperature and low-pressure gas refrigerant. The gas is supplied to the low-pressure gas pipe 15 b through the two on-off valve 44.
The gas refrigerant supplied to the low-pressure gas pipe 15b is compressed again by the compressor 18 through the suction pipes 71 of the heat exchange units 1A and 1B. As a result, all the indoor units 30A and 30B can simultaneously perform the cooling operation.

  On the other hand, when all the indoor units 30A and 30B are heated simultaneously, the switching valve 73 is closed and the four-way valve 74 is switched in each heat exchange unit 1A and 1B, and the first on-off valve is switched in each indoor unit 30A and 30B. 43 opens and the second on-off valve 44 closes. In this case, the high-temperature and high-pressure gas refrigerant discharged from the compressor 18 is supplied to the high-pressure gas pipe 15 a through the oil separator 23. In the indoor units 30A and 30B, the gas refrigerant is supplied to the indoor heat exchanger 40 through the high-pressure gas pipe 15a. Here, the refrigerant is radiated and condensed to become a liquid refrigerant, and then is passed through the indoor expansion valve 41. Is supplied to the liquid pipe 15c. The liquid refrigerant supplied to the liquid pipe 15c is supplied to the outdoor heat exchanger 21 via the refrigerant pipes 77 of the heat exchange units 1A and 1B and the receiver tank 25, where it absorbs heat and evaporates, and here, low temperature and low pressure And is compressed again by the compressor 18 through the suction pipe 71. As a result, all the indoor units 30A and 30B can be simultaneously heated.

  In addition, when performing a mixed operation of heating operation and cooling operation, for example, when the indoor unit 30A is heated and the indoor unit 30B is cooled, the heat exchange units 1A and 1B are controlled in the same manner as in the above simultaneous heating operation. On the other hand, in the indoor unit 30A, the first on-off valve 43 is closed and the second on-off valve 44 is opened. In the indoor unit 30B, the first on-off valve 43 is opened and the second on-off valve 44 is closed. In this case, high-temperature and high-pressure gas refrigerant is supplied from each heat exchange unit 1A, 1B to the high-pressure gas pipe 15a. In the indoor unit 30A, gas refrigerant is supplied to the indoor heat exchanger 40 via the high-pressure gas pipe 15a. Here, after radiating and condensing into liquid refrigerant, it is supplied to the liquid pipe 15 c via the indoor expansion valve 41. Part of the liquid refrigerant supplied to the liquid pipe 15c returns to the heat exchange units 1A and 1B, absorbs heat and evaporates in the outdoor heat exchanger 21, and becomes a low-temperature and low-pressure gas refrigerant.

On the other hand, the remainder of the liquid refrigerant supplied to the liquid pipe 15c is supplied to the indoor heat exchanger 40 of the indoor unit 30B, where it absorbs and evaporates to become a low-temperature and low-pressure gas refrigerant, and then the second on-off valve 44. Is supplied to the low-pressure gas pipe 15b.
Then, the refrigerant supplied to the low-pressure gas pipe 15 b is compressed again by the compressor 18 through the suction pipe 71 together with the gas refrigerant passed through the outdoor heat exchanger 21. Thereby, heating operation and cooling operation can be performed for each of the indoor units 30A and 30B.

  When oil is supplied between the heat exchange units 1A and 1B of the air conditioner 31, the outdoor control device 100 prevents the oil from returning from the oil balance pipe 82 to the compressor 18 in the heat exchange unit on the oil supply side. The switching valve 84 is closed under the control of. Here, the balance valve 85 of the oil balance pipe 82 is opened under the control of the outdoor control device 100, and oil flows from the oil separator 23 into the oil balance pipe 82. Further, the bypass valve 45 is opened under the control of the outdoor control device 100, and high-pressure refrigerant flows into the oil balance pipe 82 from the refrigerant discharge branch pipe 72A through the refrigerant discharge branch pipe 72C. The high-pressure refrigerant flows out to the oil pipe 15d while pushing the oil in the oil balance pipe 82, and reaches the heat exchange unit on the side receiving the supply of oil.

  In the heat exchange unit on the oil supply side, the switching valve 84 is opened under the control of the outdoor control device 100, and a conduit for flowing oil from the oil balance pipe 82 to the suction port of the compressor 18 is secured. Here, when oil and high-pressure refrigerant flow into the oil balance pipe 82 through the oil pipe 15d from the heat exchange unit on the oil supply side, the oil and refrigerant that flowed in are stopped by the check valve 86, and the oil It flows to the branch pipe 81A side and reaches the suction port of the compressor 18 from the oil branch pipe 81A through the refrigerant return pipe 81.

  The heat exchange units 1A and 1B are suspended via a hanging bracket in a sealed space behind the ceiling of a building or the like, for example. When this heat exchange unit is installed in a sealed space, the outdoor heat exchanger 21 is not suitable for the air cooling type, and the water cooling type is generally adopted as described above. When the heat exchange unit is arranged behind the ceiling, the heat exchange unit can be arranged closer to the indoor unit and the refrigerant pipe length can be designed shorter than when the heat exchange unit is arranged on the roof or the like.

FIG. 4 is a perspective view of the electrical equipment box 11 as seen from the lower left.
The electrical box 11 houses a substrate 8, a power transformer, a terminal block 9, various electric circuits such as a capacitor, and the outdoor control device 100.
The electrical box 11 has an upper surface portion 60B, a left surface portion 60C, and a right surface portion 60D formed by bending the upper end portion and the left and right end portions of the back surface portion 60A forward to form a thin, substantially rectangular box shape in the front-rear direction. is doing. Here, the front surface and the lower surface of the electrical equipment box 11 face the outside. Further, the right side surface portion 60D is formed by being bent in two stages toward the front, and the electrical box 11 has a box-like right rear corner portion formed in a substantially rectangular shape when viewed from above. It has a shape.

The front end of the left side surface portion 60C is bent leftward and is provided with a left mounting flange portion 61 that protrudes leftward in a flange shape. The left mounting flange 61 extends in the height direction with a length substantially the same as the height of the left side surface 60C.
A left mounting flange upper end 66 whose end is formed substantially horizontally is formed at the upper end of the left mounting flange 61, and a left mounting flange whose end is formed substantially horizontally at the lower end of the left mounting flange 61. A lower end 67 is formed. In addition, a left flange back surface portion 61 </ b> A is formed on the back surface of the left mounting flange portion 61 so as to be substantially parallel to the front plate 7 in a state where the electrical equipment box 11 is mounted on the unit body 20. Further, the left mounting flange portion 61 is formed with two screw holes 95 vertically for allowing the screw to pass therethrough.

On the other hand, the front end of the right side surface portion 60D is bent in the right direction, and is provided with a right mounting flange portion 62 that protrudes in a flange shape in the right direction. The right mounting flange portion 62 extends in the height direction with a length substantially the same as the height direction of the right side surface portion 60D. That is, the left mounting flange portion 61 and the right mounting flange portion 62 are provided so as to spread in opposite directions in the lateral direction along the front plate 7 of the unit body 20.
At the lower end of the right mounting flange portion 62, a right mounting flange lower end 69 having an end portion formed substantially horizontally is formed. Further, on the back surface of the right mounting flange portion 62, a right flange back surface portion 62A is formed so as to be substantially parallel to the front plate 7 in a state where the electrical box 11 is mounted on the unit main body 20. Further, the right mounting flange portion 62 is formed with two screw holes 95 for allowing the screw to pass therethrough vertically.

As shown in FIG. 2, the unit main body 20 includes a left column (column) 92 and a right column (column) 93 for attaching the electrical box 11.
The left column 92 is provided at the front end of the left side plate 4 of the unit main body 20 and is formed to be bent at a substantially right angle in a flange shape so as to be substantially parallel to the left flange back surface portion 61 </ b> A of the electrical equipment box 11. More specifically, the left column 92 has a front end of a portion formed by extending a U-shaped cross section opened in the right direction (inward direction of the unit main body 20) at the front end of the left side plate 4 in the height direction. And bent at the front end of the unit body 20 leftward (toward the outside of the unit body 20). The left support column 92 is formed by being bent a plurality of times in this manner, so that the left side plate 4 is bent in the height direction of the unit main body 20 more than the case where the left side plate 4 is bent rightward once at the front end of the unit main body 20. It is formed to increase the strength.

As shown in FIG. 2, a left contact flange portion 87 for contacting the left flange back surface portion 61 </ b> A of the electrical box 11 is provided on the front surface of the left column 92 when the electrical box 11 is attached. It is formed so that it may become substantially parallel.
In front of the lower end 87B of the left abutting flange portion 87, as shown in FIG. 5A, the left support is bent in an L shape and supports the electrical equipment box 11 from below by the left mounting flange lower end 67. A portion 96 is formed.
On the other hand, a U-shaped claw portion 94 opened downward is formed in front of the upper end 87 </ b> A of the left contact flange portion 87. Here, the distance L1 between the lower end 94A, which is the tip of the claw portion 94, and the lower end 87B of the left contact flange portion 87 is the dimension L2 between the left mounting flange upper end 66 and the left mounting flange lower end 67 of the left mounting flange portion 61. It is formed shorter. Thereby, even if the left mounting flange portion 61 supported by the left support portion 96 falls forward, the left mounting flange upper end 66 hits the back surface 94B of the claw portion 94 and is caught. Further, a contact surface 94C for contacting the upper end 66 of the left mounting flange when the electrical equipment box 11 is mounted on the lower surface of the portion bent forward at a substantially right angle from the upper end 87A of the left contact flange 87. Is formed.
A dimension L3 between the upper end 87A and the lower end 87B of the left abutting flange portion 87 is set to be approximately the same as a dimension L2 between the left mounting flange upper end 66 and the left mounting flange lower end 67.

As shown in FIG. 2, the right column 93 is provided on the left side of the step surfaces 12 and 13, and includes a column portion 93 </ b> A formed by extending a U-shaped cross section opened rearward in the height direction. At the same time, the rear end of the left surface of the pillar portion 93A is bent to a left at a substantially right angle in a flange shape so as to be substantially parallel to the right flange back surface portion 62A when the electrical box 11 is attached. .
A right contact flange portion 88 for contacting the right flange back surface portion 62A of the electrical box 11 is substantially parallel to the right flange back surface portion 62A on the front surface of the flange portion of the right column 93. The height of the right mounting flange 62 of the electrical box 11 is approximately the same as the height.
As shown in FIG. 5A, the lower end 88B of the right contact flange portion 88 is bent forward at a substantially right angle to support the electrical box 11 from below by the right mounting flange lower end 69 of the electrical box 11. A right support portion 97 is formed.
A dimension L5 between the upper end 88A and the lower end 88B of the right abutting flange 88 is set to be approximately the same as a dimension L4 between the right mounting flange upper end 68 and the right mounting flange lower end 69.

FIGS. 5A and 5B are side views showing how the electrical box 11 is attached to the unit body 20.
When attaching the electrical box 11 to the unit body 20, the user tilts the left mounting flange upper end 66 of the electrical box 11 backward as shown in FIG. In between, the left attachment flange upper end 66 is inserted, and the left attachment flange upper end 66 is brought into contact with the contact surface 94C of the claw portion 94.
When the left mounting flange upper end 66 is inserted between the claw portion 94 and the left abutment flange portion 87, the user uses the left mounting flange upper end 66 as a fulcrum as shown in FIG. The lower part 11A is rotated backward.
When the electrical box 11 is rotated rearward, the left flange back surface portion 61A of the electrical equipment box 11 and the left contact flange portion 87 of the left support column 92 come into contact with each other, and the right flange back surface portion 62A and the right support column 93 of the electrical equipment box 11 are contacted. Rotation stops at the position where the right contact flange portion 88 contacts. At this time, the left mounting flange lower end 67 is supported by the left support portion 96 and the right mounting flange lower end 69 is supported by the right support portion 97, and the electrical box 11 is temporarily fixed.

6A is a perspective view showing the claw portion 94 and the left mounting flange upper end 66, FIG. 6B is a perspective view showing the left support portion 96 and the left mounting flange lower end 67, and FIG. It is a perspective view which shows the right support part 97 and the right attachment flange lower end 69. FIG.
When the electrical box 11 is temporarily fixed to the unit body 20, the left mounting flange upper end 66 is left contacted with the back surface 94B (see FIG. 5B) of the claw portion 94 as shown in FIG. It is located between the flange portion 87. Further, as shown in FIG. 6 (b), the left mounting flange lower end 67 is supported from below by the left support portion 96, and the right mounting flange lower end 69 is supported by the right support portion 97 as shown in FIG. 6 (c). Is supported from below.
Thus, when the electrical box 11 is tilted backward with the left mounting flange lower end 67 and the right mounting flange lower end 69 as fulcrums, the left flange rear surface 61A (see FIG. 5B) of the electrical mounting box 11 and the left column The left abutting flange portion 87 of 92 and the right abutting flange portion 88 (see FIG. 5B) of the electrical box 11 and the right abutting flange portion 88 of the right column 93 (see FIG. 5B). And abut.

Further, when the electrical box 11 is tilted forward with the left mounting flange lower end 67 and the right mounting flange lower end 69 as fulcrums, the rear mounting 94B (see FIG. 5 (b)) of the left column 92 and the left mounting The upper end 66 of the left mounting flange of the flange portion 61 comes into contact.
At this time, each screw hole 95 formed in the left mounting flange portion 61 and the right mounting flange portion 62 of the electrical box 11, and each screw hole 65 formed in the left contact flange portion 87 and the right contact flange portion 88. The corresponding positions communicate with each other. As shown in FIG. 2, the user secures the electrical box 11 to the unit body by attaching screws 70, and the electrical box 11 is attached to the unit body 20 as shown in FIG.

  According to the present embodiment, the left abutment flange portion 87 provided with the left support portion 96 and the claw portion 94 and the right support portion 97 provided with the left support portion 96 and the right support portion 97 with respect to the left support post 92 and the right support post 93 to which the electrical box 11 is attached. And an abutting flange portion 88. Thereby, the electrical box 11 can be attached and detached without moving upward, and there is no space for sliding the electrical box 11 upward between the electrical box 11 and the upper surface plate 2 of the unit body 20. Even in this case, the electrical box 11 can be temporarily fixed. For this reason, it is easy to attach and detach the electrical box 11 without providing a complicated structure, and furthermore, the height of the unit body 20 can be kept low.

  Further, according to the present embodiment, the left support flange 96, the claw portion 94, and the screw hole 65 are integrally provided in the left mounting flange portion 61 in the left contact flange portion 87 of the unit body 20, so Since the right support portion 97 and the screw hole 65 are provided integrally with the right mounting flange portion 62 in the flange portion 88, the number of parts can be reduced.

As mentioned above, although this invention was demonstrated based on one Embodiment, this invention is not limited to this. In the above embodiment, the claw portion 94 is provided only on the left support 92, but is not limited thereto, and may be provided on the right support 93 instead of the left support 92, or both the left support 92 and the right support 93. May be provided.
Moreover, in the said embodiment, although the left support part 96 and the right support part 97 are provided in the position of a different height, it is not limited to this, The same height may be sufficient.
Furthermore, in the said embodiment, although demonstrated with what is called a three-way air conditioning apparatus provided with three refrigerant | coolant piping, it is not limited to this, The two-way air conditioning apparatus provided with two general refrigerant | coolant piping Needless to say, the present invention is also applicable.

It is a perspective view of the heat exchange unit which concerns on embodiment of this invention. It is a perspective view which abbreviate | omits and shows an upper surface board, a right side board, a front board, and a cover part from the heat exchange unit of FIG. It is a refrigerant circuit figure of the air conditioning apparatus provided with the heat exchange unit which concerns on embodiment of this invention. It is a perspective view which shows an electrical equipment box. It is a left view which shows a unit main body and an electrical equipment box. (A) It is a perspective view which shows a nail | claw part. (B) It is a perspective view which shows the left support part 96. FIG. (C) It is a perspective view which shows a right support part. It is a perspective view which shows a mode that the electrical equipment box was attached to the unit main body.

Explanation of symbols

1 Heat Exchange Unit 11 Electrical Box 18 Compressor 20 Unit Main Body 21 Outdoor Heat Exchanger (Heat Exchanger)
61 Left mounting flange (mounting flange)
62 Right mounting flange (mounting flange)
87 Left contact flange (contact flange)
88 Right contact flange (contact flange)
92 Left column (post)
93 Right support (support)
94 Claw part 96 Left support part (support part)
97 Right support part (support part)

Claims (4)

In a heat exchange unit comprising a unit body containing a compressor and a heat exchanger, comprising a column for attaching an electrical box on the side surface of the unit body facing the compressor, wherein the electrical box is detachably provided on the column.
A contact flange portion that contacts the mounting flange portion of the electrical box is formed on the support column, and a support portion that supports a lower end of the mounting flange portion of the electrical box is provided at a lower end of the contact flange portion. A heat exchange unit comprising a claw portion for locking an upper portion of the mounting flange portion of the electrical box at an upper portion of the contact flange portion. The dimension between the upper end of the contact flange part and the lower end of the contact flange part is
Provided with approximately the same dimension as the dimension between the upper end of the mounting flange part and the lower end of the mounting flange part,
The heat exchange unit according to claim 1, wherein the mounting flange portion is disposed between the claw portion and the mounting flange portion. The claw portion is formed by bending the upper end of the abutting flange portion into a U-shape opened downward on the side where the mounting flange portion is disposed,
3. The heat exchange according to claim 1, wherein the support portion is formed by bending a part of the contact flange portion into an L shape on a side where the mounting flange portion is disposed. unit. When attaching the electrical box, with the upper end of the mounting flange part inserted from below between the claw part and the abutting flange part, the lower part of the electrical box is attached to the upper end of the mounting flange part as a fulcrum. The heat exchanging unit according to any one of claims 1 to 3, wherein the heat exchanging unit is configured to rotate so that the support portion supports a lower end of the mounting flange portion.

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