JP2014025668A - Refrigerant circuit unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerant circuit unit in which a body case and an electric component box can be positioned with a simple structure in a state of securing a prescribed interval therebetween, while complementing supporting strength of the body case when the large-scaled heavy electric component box is hooked on the body case and the electric component box is then positioned to the body case.SOLUTION: The switching unit includes the body case and the electric component box. A hooking claw 511 disposed on an outer face 510 of the electric component box is hooked on a hooking portion 1100a disposed on an electric component box supporting portion 1100 as a front face portion 110 of the body case. When portions α extended longer than a prescribed interval S of projecting portions 512 disposed so as to project to an outer face 510 side of the electric component box, are entirely fitted to recessed portions 1120a disposed on the electric component box arrangement portion 1120 as a front face portion 112 of the body case, the projecting portions 512 can be fixed to the recessed portions 1120a.

Description

  The present invention relates to a refrigerant circuit unit.

  Conventionally, a refrigerant circuit unit provided between one or a plurality of outdoor units and a plurality of indoor units in a multi-room air conditioner is known. The refrigerant circuit unit is a unit in which refrigerant pipes and electromagnetic valves that constitute a part of the refrigerant circuit of the multi-room air conditioner are combined, and a plurality of refrigerant pipes connected to the outdoor unit are connected to each indoor unit. A plurality of refrigerant pipe sets that switch the operation of the indoor unit to the cooling operation or the heating operation by selecting one of the two refrigerant pipes that branch to the refrigerant pipe and the two refrigerant pipes connected to the outdoor unit and connecting to the indoor unit There are switching units that combine the two.

  Such a refrigerant circuit unit includes a plurality of refrigerant pipes, a plurality of electromagnetic valves having electromagnetic coils and connected to the refrigerant pipes, a main body case that houses the refrigerant pipes and the electromagnetic valves, and a plurality of electromagnetic valves. And an electrical component box that houses a control board that controls opening and closing. As the electromagnetic valve, an on-off valve, an electronic expansion valve, or the like is used, and a heat insulating material is formed inside the main body case so as not to cause condensation on the accommodated refrigerant pipe and the electromagnetic valve.

  As an example of this type of refrigerant circuit unit, a mounting portion for mounting the electrical component box is formed on the side surface of the main body case, and a mounting claw that hooks on the mounting portion is formed on the side surface of the electrical component box. There is a branch unit in which an electrical component box can be attached to the side surface of the door (see, for example, Patent Document 1). This branch unit supports the electrical component box on the main body case by hooking the mounting claws formed on the electrical component box on the mounting portion formed on the main body case, and then attaches the electrical component box to the main body case. It is designed to be aligned and fixed. However, the switching unit that combines a plurality of refrigerant piping sets connected to each indoor unit is large and heavy because the electrical component box accommodates a control board corresponding to the plurality of refrigerant piping sets. After the product box is supported by the main body case, in order to align the electrical component box with respect to the main body case, there is a problem that a part to be aligned with the mounting portion formed in the main body case is required. . In addition, when positioning the electrical component box with respect to the main body case, the weight of the electrical component box is added to the mounting portion formed on the main body case, so that the mounting portion may be deformed and the weight of the electrical component box can be withstood. As described above, there is a problem that it is necessary to make the mounting portion strong.

  In addition, this type of refrigerant circuit unit includes, for example, an electrical component fixing screw for fixing the electrical component and a substrate fixing spacer for fixing the control board inside the electrical component box. 1 has a structure in which the tip of the electrical component fixing screw and the locking portion of the substrate fixing spacer protrude. For this reason, when the electrical component box is attached to the main unit case, make sure that the tip of the electric component fixing screw and the locking part of the substrate fixing spacer do not hit the main unit case. There was a problem that a spacer or a stand for securing a predetermined interval was required. Furthermore, since the spacer and the base are arranged between the main body case and the electrical component box, there is a problem that it is difficult to align the main body case and the electrical component box.

Japanese Patent No. 4701804

  In view of the above problems, the present invention supplements the support strength of the main body case when aligning the electric component box with respect to the main body case after the large and heavy electric component box is hooked on the main body case. It is an object of the present invention to provide a refrigerant circuit unit capable of aligning a main body case and an electrical component box with a simple structure while maintaining a predetermined distance between the main body case and the electrical component box.

  In order to solve the above problems, a refrigerant circuit unit according to the present invention includes a refrigerant pipe unit including a plurality of refrigerant pipes, and a plurality of electromagnetic valves including an electromagnetic coil and a valve body connected to the refrigerant pipe, and a refrigerant. It consists of a box-shaped main body case that houses the piping unit, and an electrical component box that houses a control board that controls the opening and closing of the solenoid valve, and is provided between one or more outdoor units and multiple indoor units It is done. Of the refrigerant pipes, the refrigerant pipe connected to the pipe extending from the indoor unit is led out from the back surface of the main body case, and among the refrigerant pipes, the refrigerant pipe connected to the pipe extending from the outdoor unit is led out from the left side surface and the right side surface of the main body case. The cylinder portion of the valve main body is led out from the front surface of the main body case. The front portion of the main body case includes an electrical component box support portion that supports the electrical component box and an electrical component box placement portion that places the electrical component box. On the front side of the main body case, there is provided an electromagnetic coil arrangement portion for arranging an electromagnetic coil formed with a step from the electrical component box arrangement portion to the back side of the main body case. The electromagnetic coil is attached to a cylinder portion derived from the electromagnetic coil arrangement surface. The electrical component box support portion includes a hook portion formed so as to open both left and right ends, and the electrical component box arrangement portion includes a plurality of recesses. The surface of the electrical component box facing the front part of the main body case has a hooking claw that is hooked to the hooking part at a position facing the hooking part when attached to the front part of the main body case, and a position corresponding to the recess. And a convex portion which has a height extending from a predetermined interval secured between the main body case and the electrical component box and is fitted into the concave portion. The electrical component box hooks the hooking claw on the hooking portion, and the convex portion can be fixed to the concave portion when all the portions of the convex portion extending beyond the predetermined interval are fitted into the concave portion.

  In addition, a maintenance hook for hooking a hooking claw provided in the electrical component box is provided on the front surface of the main body case in the vicinity below the electromagnetic coil placement portion.

  According to the refrigerant circuit unit of the present invention, the hooking claw provided on the surface of the electrical component box is hooked on the hooking portion provided in the electrical component box support portion, and the convex portion is more than a predetermined interval. Since the convex part can be fixed to the concave part when all the extended parts are fitted into the concave part, after the large and heavy electrical component box is hooked on the main body case, the electric part is attached to the main body case. While supplementing the support strength of the main body case when aligning the box, the main body case and the electric component box are aligned with a simple structure and a predetermined distance between the main body case and the electric component box. be able to.

  In addition, the front of the main body case has a maintenance hook for hooking the hooks provided on the electrical equipment box, so the electrical equipment box removed from the main body case is placed at a remote location. There is no need, and maintenance of the electromagnetic coil can be performed in a state where the hooking hook is hooked on the hooking portion for maintenance, and the serviceability at the time of maintenance can be improved.

It is an external appearance perspective view which shows the state which looked at the refrigerant circuit unit by this invention from the front side. It is an external appearance perspective view which shows the state which looked at the refrigerant circuit unit by this invention from the back side. It is a disassembled perspective view which shows the electrical component box removed from the main body case of a refrigerant circuit unit, (a) is a perspective view which shows the state which removed the electrical component box cover from the electrical component box mounting plate, (b) is electrical component box attachment It is a perspective view which shows the state which removed the board from the main body case. It is a disassembled perspective view which shows the state which looked at the refrigerant circuit unit from the front upper side. It is an expansion perspective view which shows the gas refrigerant | coolant piping group which comprises the refrigerant | coolant piping unit in FIG. It is sectional drawing which shows the state which cut | disconnected the left side part of the main body case and the electrical component box mounting plate in Fig.3 (a) by the vertical surface, (a) is a vertical surface which passes along the center of the convex part with which the electrical component box was equipped. Cross-sectional view showing the cut state, (b) is a partial cross-sectional view showing a state cut along the vertical plane passing through the hooking claw provided in the electrical component box, (c) is a view of the arrow A in (b) It is an expanded sectional view showing the inside of a circle. It is a perspective view which shows the state which supported the electrical component box mounting plate in the main body case in the case of the maintenance of an electromagnetic coil. It is sectional drawing which shows the state which cut the left side part of the main body case and the electrical component box attachment plate in FIG. 7 with the vertical surface.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. As a refrigerant circuit unit, one or a plurality of outdoor units and a plurality of indoor units are connected, and can be selected between a cooling operation and a heating operation for each indoor unit. The switching unit to be used will be described as an example. The switching unit is provided between the outdoor unit and the indoor unit, and selects one of the two refrigerant pipes connected to the outdoor unit and connects the indoor unit to the cooling unit or the heating unit. It is comprised from the some refrigerant | coolant piping group switched to a driving | operation.

  In the switching unit of the multi-room air conditioner in the present embodiment, one or a plurality of outdoor units and a plurality of indoor units are connected by three refrigerant pipes composed of a high-pressure gas pipe, a low-pressure gas pipe, and a liquid pipe. It is used for a multi-room air conditioner and is connected to a high pressure gas pipe, a low pressure gas pipe and a liquid pipe between the outdoor unit and the plurality of indoor units. As shown in FIGS. 1 to 3, the switching unit 1 includes a main body case 10 formed in a box shape including a front surface 11, a back surface 12, an upper surface 13, a lower surface 14, a left side surface 15, and a right side surface 16. Yes. The switching unit 1 is installed on a slab (installation object) such as the back of the ceiling or under the floor by fixing the hanging metal fitting 20 provided on the main body case 10 to a suspension bolt provided in the building.

  On the left side surface 15 of the main body case 10 on the outdoor unit side, a high pressure gas connection pipe 30, a low pressure gas connection pipe 31, and a liquid connection pipe 32 are connected to a high pressure gas pipe, a low pressure gas pipe, and a liquid pipe respectively extending from the outdoor unit. Has been derived. The high-pressure gas connection pipe 30, the low-pressure gas connection pipe 31, and the liquid connection pipe 32 are also led out from the right side surface 16 of the main body case 10 and connected to the corresponding refrigerant pipes of another switching unit 1, so that the number of indoor units The switching unit 1 can be added according to the situation. When the switching unit 1 is not added, the high pressure gas connection pipe 30, the low pressure gas connection pipe 31, and the liquid connection pipe 32 are closed with a lid (not shown). The right side surface 16 of the main body case 10 may be the outdoor unit side according to the installation location of the switching unit 1. On the back surface 12 of the main body case 10 on the indoor unit side, a plurality of gas connection pipes 33, 33,... And a liquid connection pipe 34 connected to a plurality of gas pipes and liquid pipes extending from the plurality of indoor units, respectively. 34 are derived. The main body case 10, the high-pressure gas connection pipe 30, and the low-pressure gas are respectively connected to the lead-out portions of the high-pressure gas connection pipe 30, the low-pressure gas connection pipe 31, the liquid connection pipe 32, the gas connection pipe 33, and the liquid connection pipe 34. Cylindrical seal members S30, S31, S32, S33, and S34 that block the gaps between the connection pipe 31, the liquid connection pipe 32, the gas connection pipe 33, and the liquid connection pipe 34, and shut off the main body case 10 and the outside, respectively. Has been placed.

  The high-pressure gas connection pipe 30, the low-pressure gas connection pipe 31, and the liquid connection pipe 32 are arranged in the front-rear direction of the main body case 10 in the order of the high-pressure gas connection pipe 30, the liquid connection pipe 32, and the low-pressure gas connection pipe 31 from the back surface 12 side. Are lined up. The plurality of gas connection pipes 33, 33,... Are arranged on the upper side of the main body case 10, and the plurality of liquid connection pipes 34, 34,. Are lined up in the left and right direction. A pair of upper and lower gas connection pipes 33 and a liquid connection pipe 34 are connected to each indoor unit. The tube axes of the high-pressure gas connection pipe 30, the low-pressure gas connection pipe 31, and the liquid connection pipe 32 extend in the left-right direction of the main body case 10, and a plurality of gas connection pipes 33, 33,. The tube axes of 34,... Extend in the front-rear direction of the main body case 10. Each of the high pressure gas connection pipe 30, the low pressure gas connection pipe 31, the liquid connection pipe 32, the gas connection pipe 33, and the liquid connection pipe 34 constitutes a part of the refrigerant pipe connected between the indoor unit and the outdoor unit. ing.

  A plurality of inlets 131, 131,... For injecting a stock solution of foam heat insulating material are formed on the upper surface 13 of the main body case 10. In the main body case 10, a plurality of electromagnetic coils 401, 411, 421, 431,..., A high-pressure gas connection pipe 30, a low-pressure gas connection pipe 31, and a liquid connection pipe 32 constituting a refrigerant piping unit described later. In order to prevent condensation on the gas connection pipe 33, the liquid connection pipe 34, etc., a foaming insulating material (not shown) filled from the plurality of inlets 131, 131,. Has been. As shown in FIG. 3, a sheet metal electrical component box 50 detachable from the main body case 10 is disposed on the front surface 11 of the main body case 10, and a plurality of electromagnetic coils 401 are removed by removing the electrical component box 50. 411, 421, 431,... Are exposed, and maintenance such as inspection and replacement of these electromagnetic coils 401, 411, 421, 431,. Since the main body case 10 is installed behind the ceiling, under the floor, etc., when maintenance is not performed, a plurality of electromagnetic coils 401, 411, 421, 431,. The electromagnetic coils 401, 411, 421, 431,... Are protected from outside air and dust.

  Next, the configuration of the refrigerant piping unit partially accommodated in the main body case 10 will be specifically described with reference to FIGS. 4 and 5. As shown in FIGS. 4 and 5, the refrigerant piping unit U1 includes a gas refrigerant piping set PG and a liquid refrigerant piping set PL. The gas refrigerant pipe set PG includes a high-pressure gas connection pipe 30, a low-pressure gas connection pipe 31, and a plurality of gas refrigerant pipe groups PG1 to PG4. In addition, since several gas refrigerant | coolant piping group PG1-PG4 is provided for every indoor unit, since each has the same structure, only gas refrigerant | coolant piping group PG1 is demonstrated below.

  The gas refrigerant pipe group PG1 includes a gas connection pipe 33, an upper on-off valve group V1, a lower on-off valve group V2, and the like. Inside the main body case 10, the gas connection pipe 33 is connected to the high-pressure gas connection pipe 30 and the low-pressure gas connection pipe 31 via the upper on-off valve group V1 and the lower on-off valve group V2.

  The upper on-off valve group V1 includes a plurality of on-off valves 40 and 41 arranged on the upper side of the main body case 10, and the on-off valve 40 switches the indoor unit to the heating operation, and the on-off valve 41 switches the indoor unit to the cooling operation. Works with applications. The on-off valves 40 and 41 may be connected to an electromagnetic valve such as an electronic expansion valve depending on the type and application of the connected indoor unit. The on-off valve 40 is connected between the gas connection pipe 33 and the high-pressure gas connection pipe 30, and the on-off valve 41 is connected between the gas connection pipe 33 and the low-pressure gas connection pipe 31. Each of the on-off valves 40 and 41 includes valve bodies 400 and 410 and electromagnetic coils 401 and 411.

  Each valve main body 400, 410 is arranged inside the main body case 10 along a cylinder part lead-out plate P2 described later that forms a part of the front surface 11 of the main body case 10 shown in FIG. Cylinder portions 402 and 412 are provided. Each cylinder part 402, 412 extends in the front-rear direction of the main body case 10 and has a front surface 11 of the main body case 10 opposite to the direction of the gas connection pipe 33 led out from the rear surface 12 of the main body case 10. That is, it is led out from a cylinder part lead-out plate P2 described later. Each of the electromagnetic coils 401 and 411 has a hole (not shown) for insertion into the cylinder portions 402 and 412, and is attached to the valve main bodies 400 and 410 by being inserted into the cylinder portions 402 and 412.

  The lower on-off valve group V2 includes a plurality of on-off valves 42 and 43 disposed below the upper on-off valve group V1 and above the low-pressure gas connection pipe 31, and the on-off valves 42 and 43 are It operates in applications that equalize the refrigerant pressure during indoor unit operation. The on-off valve 42 and the on-off valve 43 are connected in series, the on-off valve 42 is connected to the high-pressure gas connection pipe 30, and the on-off valve 43 is connected to the low-pressure gas connection pipe 31. The on-off valves 42 and 43 include valve bodies 420 and 430 and electromagnetic coils 421 and 431, respectively.

  Each valve main body 420, 430 is disposed inside the main body case 10 along a cylinder part lead-out plate P2 (described later) that forms a part of the front surface 11 of the main body case 10 shown in FIG. Cylinder portions 422 and 432 are provided. Each cylinder part 422,432 is derived | led-out from the cylinder part derivation | leading-out board P2 mentioned later similarly to the cylinder parts 402,412. Each of the electromagnetic coils 421 and 431 includes a hole (not shown) for insertion into the cylinder portions 422 and 432, and is attached to the valve bodies 420 and 430 by being inserted into the cylinder portions 422 and 432.

  As shown in FIG. 3, the on-off valves 40 and 41 constituting the upper on-off valve group V1 and the on-off valves 42 and 43 constituting the lower on-off valve group V2 are cylinder parts derived from a cylinder part derivation plate P2, which will be described later. The cylinder portions 402, 412, 422, 432 are arranged in the left-right direction of the main body case 10 so that the side surfaces of the plurality of electromagnetic coils 401, 411, 421, 431 attached to 402, 412, 422, 432 are aligned. They are arranged alternately at a predetermined interval.

  The liquid refrigerant piping set PL includes a liquid connecting pipe 32 and a plurality of liquid connecting pipes 34, 34,. Inside the main body case 10, the plurality of liquid connection pipes 34 are respectively connected to the liquid connection pipes 32 and can be connected to each indoor unit.

  In the switching unit 1 described above, the cylinder portions 402, 412, 422, and 432 extend in the front-rear direction of the main body case 10, and are described later in a direction opposite to the direction in which the gas connection pipe 33 is led out. Since it is derived from P2, the vertical dimension of the main body case 10 can be reduced compared to a conventional refrigerant circuit unit in which a plurality of solenoid valves are erected in the vertical direction of the main body case 10, and the switching unit 1 is It can be downsized. Further, since the cylinder portions 402, 412, 422, and 432 are alternately arranged in the left-right direction of the main body case 10 with a predetermined interval, the switching unit 1 can be further downsized in the vertical direction of the main body case 10. it can.

  Further, since the switching unit 1 is installed behind the ceiling or under the floor, the foamed heat insulating material is filled inside the main body case 10 in which the refrigerant piping unit U1 is partially accommodated. It is better to fill the electromagnetic coils 401, 411, 421, 431,... With a foamed heat insulating material, but the electromagnetic coils 401, 411, 421, 431 are more likely to be broken compared to other components housed. .. Are exposed from a cylinder part lead-out plate P2, which will be described later, so that maintenance can be performed.

  Next, the configuration of the main body case 10 will be specifically described with reference to FIGS. 3 and 4. As shown in FIGS. 3 and 4, the main body case 10 includes an upper case C1, a lower case C2, a refrigerant pipe lead plate P1, and a cylinder part lead plate P2. The upper case C1 is formed by bending the sheet metal to the front surface portion 110, the front surface portion 111, the back surface portion 120, the upper surface portion 130, the left side surface portion 150, the right side surface portion 160, and the upper surface portion 130 by spot welding or screwing. A plurality of upper partition plates 17, 17,... Mounted vertically. The lower case C2 includes a back surface portion 121, a bottom surface portion 140, a left side surface portion 151, and a right side surface portion 161 formed by bending a sheet metal, and a plurality of lower surfaces that are vertically attached to the bottom surface portion 140 by spot welding or screwing. The partition plates 18, 18,... Are provided.

  A front portion 110 provided in the upper case C1 is a part of the front surface 11 of the main body case 10 shown in FIG. 3B, and is formed by bending the electrical component box 50 downward from the upper surface portion 130. An electrical component box support 1100 is provided. As shown in FIGS. 3B and 7, the electrical component box support portion 1100 includes a plurality of hook portions 1100a and 1100a formed to open both left and right ends, and a plurality of hook portions 1100a and 1100a. Screw holes 1100b and 1100b are provided near the center as viewed from the top. The front part 111 provided in the upper case C1 is a part of the front face 11 of the main body case 10 shown in FIG. 3B, and is bent to the right and left from the left side part 150 and the right side part 160, respectively. A plurality of maintenance hooks 1110 and 1110 used for maintenance of the formed electromagnetic coils 401, 411, 421, and 431 are provided. During the maintenance, the plurality of maintenance hooks 1110, 1110 all of the plurality of electromagnetic coils 401, 411, 421, 431 covered with the electrical component box 50 appear, and the electrical component box 50 is obstructive. In order to prevent this, it is formed at a position near the lower side of an electromagnetic coil placement portion 113 described later.

  The left side 150 provided in the upper case C1 has a notch 150a for leading out the high-pressure gas connection pipe 30 on the back surface 120 side, and a notch for leading out the low-pressure gas connection pipe 31 on the front face 110, 111 side. 150b and a notch 150c for leading out the liquid connection pipe 32 are formed between the notch 150a and the notch 150b. Similarly, notch portions (not shown) for leading out the high pressure gas connection pipe 30, the low pressure gas connection pipe 31 and the liquid connection pipe 32 are formed in the right side surface portion 160 provided in the upper case C1. A plurality of notch portions (not shown) that lead out the plurality of gas connection pipes 33, 33,... Are provided at predetermined intervals in the left-right direction of the main body case 10 on the back surface portion 120 provided in the upper case C1. Yes. In addition, flange portions 150d and 160d that contact a cylinder portion lead-out plate P2 described later are formed at the end portions on the front surface portions 110 and 111 on the left side surface portion 150 and the right side surface portion 160 provided in the upper case C1, respectively. ing.

  In the left side surface portion 151 provided in the lower case C2, a notch portion 151a for leading out the high-pressure gas connection tube 30 to the back surface portion 121 side, and a low-pressure gas connection tube 31 on the front surface 11 side shown in FIG. A notch 151b that leads out, and a notch 151c that leads out the liquid connection pipe 32 are formed between the notch 151a and the notch 151b. Similarly, notches 161a, 161b, 161c for leading out the high pressure gas connection pipe 30, the low pressure gas connection pipe 31, and the liquid connection pipe 32 are formed in the right side surface portion 161 provided in the lower case C2. A plurality of notch portions (not shown) that lead out the plurality of liquid connection pipes 34, 34,... Are provided at predetermined intervals in the left-right direction of the main body case 10. Yes. Further, on the left side surface 151 and the right side surface 161 provided in the lower case C2, flanges 151d and 161d that abut on a cylinder part lead-out plate P2 described later are provided at the end on the front surface 11 side shown in FIG. Are formed respectively.

  The upper partition plate 17 provided in the upper case C1 and the lower partition plate 18 provided in the lower case C2 are provided in the same number, that is, three each, and the upper partition plates 17, 17,. .. And the lower partition plates 18, 18,... Overlap each other when the main body case 10 is assembled so that a plurality of spaces are formed in the main body case 10 in the left-right direction of the main body case 10. It is a partition. Inside the main body case 10, a foamed heat insulating material is injected into each of the plurality of spaces by injecting a stock solution of foam heat insulating material from a plurality of inlets 131, 131,... Formed in each of the plurality of spaces. Filled. The three upper partition plates 17, 17,... And the three lower partition plates 18, 18,... Form four spaces corresponding to the four gas refrigerant piping groups PG1 to PG4. Although partitioned, the present invention is not limited to this. For example, the central upper partition plate 17 and the central lower partition plate 18 may be partitioned so as to form two spaces corresponding to the gas refrigerant piping groups PG1 and PG2 and the gas refrigerant piping groups PG3 and PG4. .

  In the three upper partition plates 17, 17,... Provided in the upper case C 1, there are notch portions (not shown) that lead out the high-pressure gas connection pipe 30 to the back surface portion 120 side, and front surface portions 110 and 111 side. .. That lead out the low-pressure gas connection pipe 31 and a not-shown not-shown part that leads out the liquid connection pipe 32 are formed between these notches.

  In the three lower partition plates 18, 18,... Provided in the lower case C 2, notches 18 a, 18 a,... Leading out the high-pressure gas connection pipe 30 to the back surface 121 side, and FIG. b) between the notches 18b, 18b,... for leading out the low-pressure gas connection pipe 31 to the front surface 11 side and the notches 18a, 18a,. Are formed with notches 18c, 18c,... For leading out the liquid connection pipe 32, respectively.

  The refrigerant pipe lead-out plate P <b> 1 includes a back surface portion 122 that forms a part of the back surface 12 of the main body case 10. A plurality of gas connection pipes 33, 33 are provided on the back surface part 122 provided in the refrigerant pipe lead-out plate P1 at a predetermined interval in the left-right direction of the main body case 10 on the side in contact with the back surface part 120 provided in the upper case C1. Are formed with a plurality of notches 122a, 122a,... At a predetermined interval in the left-right direction of the main body case 10 on the side in contact with the back surface 121 provided in the lower case C2. A plurality of notches 122b, 122b,... For leading out the liquid connection pipes 34, 34,.

  As shown in FIGS. 3 and 4, the cylinder portion lead-out plate P <b> 2 includes a front surface portion 112 that forms a part of the front surface 11 of the main body case 10. The front part 112 provided in the cylinder part lead-out plate P2 is provided with an electrical component box placement part 1120 for placing the electrical component box 50. Further, the cylinder part lead-out plate P2 is bent from the electrical component box arrangement part 1120 and formed with a step on the back side of the main body case 10, and an electromagnetic coil arrangement for arranging the electromagnetic coils 401, 411, 421, 431. The unit 113 is provided. The electrical component box disposition portion 1120 includes a plurality of recesses 1120a and 1120a formed by drawing or pressing on the left side near the left side 15 of the main body case 10 and the right side near the right side 16 of the main body case 10. Yes. The plurality of recesses 1120a and 1120a are formed with screw holes 1120b and 1120b, respectively, on the bottom surfaces thereof.

  The distance from the electrical component box placement unit 1120 to the electromagnetic coil placement unit 113 is greater than the height of the electromagnetic coils 401, 411, 421, 431, and the electromagnetic coils 401, 411, 421, 431 are located in the electrical component box 50. It is designed not to touch. Further, the peripheral edge of the electrical component box disposition portion 1120 is in contact with flange portions 150d and 160d formed on the upper case C1 and flange portions 151d and 161d formed on the lower case C2. In addition, in the bent portion of the electrical component box arrangement portion 1120, the cylinder portion lead-out plate P <b> 2 is arranged on the inner surface side of the left side surface portion 150 and the right side surface portion 60 provided in the upper case C <b> 1 in order to arrange the cylinder portion lead-out plate P <b> 2 on the front side. Flange portions 1120c and 1120c that contact each other are formed.

  The electromagnetic coil placement portion 113 is formed with a plurality of holes 113a, 113a,... That lead out the plurality of cylinder portions 402, 412, 422, and 432, respectively. The plurality of electromagnetic coils 401, 411, 421, 431 are attached to a plurality of cylinder portions 402, 412, 422, 432 derived from the plurality of holes 113a, 113a,. Further, on the periphery of the electromagnetic coil placement portion 113, in order to place the cylinder portion lead plate P2 on the front side of the upper case C1, the inner surfaces of the upper surface portion 130, the left side surface portion 150, and the right side surface portion 160 provided in the upper case C1. Flange portions 113b, 113b, and 113b that are in contact with the sides are formed.

  As shown in FIG. 5, the high-pressure gas connection pipe 30 and the low-pressure gas connection pipe 31 constituting the gas refrigerant pipe set PG include an upper partition plate 17 and a lower partition plate 18, and a high-pressure gas connection pipe 30 and a low-pressure gas. Cylindrical seal members S300, S310,... That close the gap between the connecting pipes 31 and block the spaces inside the main body case 10 are arranged. The position of the seal member S300 is a position where it contacts a notch (not shown) formed in the upper partition plate 17 and a notch 18a formed in the lower partition plate 18. The position of the seal member S310 is a position where the notch (not shown) formed on the upper partition plate 17 and the notch 18b formed on the lower partition plate 18 are in contact with each other. As shown in FIG. 4, the liquid connection pipe 32 constituting the liquid refrigerant pipe set PL closes a gap between the upper partition plate 17 and the lower partition plate 18 and the liquid connection pipe 32, and the main body case 10. Are arranged in a cylindrical shape to block the internal spaces of each other. The position of the seal member S320 is a position where the notch (not shown) formed on the upper partition plate 17 and the notch 18c formed on the lower partition plate 18 are in contact with each other.

  Next, the configuration of the electrical component box 50 disposed on the front surface 11 of the main body case 10 will be specifically described with reference to FIGS. 1, 2, and 3. The electrical component box 50 includes an electrical component box bottom plate 51 made of sheet metal and formed in a shape that opens forward and upward, an electrical component box cover 52 made of sheet metal and formed in an L shape, and a plurality of on-off valves. A plurality of control boards 53, 53,... For controlling the opening / closing of 40, 41, 42, 43. The electrical component box bottom plate 51 is attached to the electrical component box support portion 1100 and the electrical component box placement portion 1120 whose outer surface 510 (surface of the electrical component box 50) is the front surface 11 of the main body case 10, and has a plurality of control boards on the inner surface. 53, 53,... Are mounted. The plurality of control boards 53, 53,... Are arranged corresponding to the four groups of the plurality of electromagnetic coils 401, 411, 421, 431. The electrical component box cover 52 is attached to the electrical component box bottom plate 51 so as to cover the plurality of control boards 53, 53,. The electrical component box cover 52 can be removed from the electrical component box bottom plate 51, and a plurality of control boards 53, 53,... Can be inspected and replaced.

  When mounted on the front surface 11 of the main body case 10, the electrical component box bottom plate 51 provided in the electrical component box 50 is positioned at a position facing the plurality of hooks 1100 a and 1100 a provided in the electrical component box support unit 1100. , A plurality of hooking claws 511 and 511 hooked on the plurality of hooking portions 1100a and 1100a, and a plurality of screws at positions facing the plurality of screw holes 1100b and 1100b provided in the electrical component box support portion 1100. Insertion holes 513 and 513 are provided. As shown in FIG. 6C, the plurality of hooking claws 511 and 511 are formed in a hook shape extending from the outer surface 510 side and bent and extended downward. In addition, when the electrical component box bottom plate 51 is attached to the front surface 11 of the main body case 10, the plurality of recesses 1120a and 1120a are disposed at positions corresponding to the plurality of recesses 1120a and 1120a provided in the electrical component box disposition portion 1120. A plurality of convex portions 512 and 512 to be fitted are provided. The plurality of convex portions 512 and 512 are formed by drawing or pressing. The plurality of convex portions 512 and 512 have screw insertion holes 512a and 512a formed on the bottom surfaces thereof, respectively, and are provided so as to protrude from the outer surface 510 side.

  Next, a state in which the electrical component box bottom plate 51 provided in the electrical component box 50 is attached to the front surface 11 of the main body case 10 will be described with reference to FIG. As shown in FIG. 6, the electrical component box bottom plate 51 includes an electrical component box support portion 1100 provided on the upper case C1 of the main body case 10 and an electrical component box arrangement portion 1120 provided on the cylinder portion lead-out plate P2. It is attached in the state which contacted. Specifically, the outer surface 510 on the inner side of the hooking claw 511 provided on the electrical component box bottom plate 51 is in contact with the electrical component box support portion 1100 and is provided on the electrical component box bottom plate 51. Further, the hooking claw 511 is hooked on a hooking portion 1100 a provided in the electrical component box support portion 1100.

  The electrical component box bottom plate 51 is provided with a substrate fixing spacer 531 for fixing the control substrate 53 on the inner surface side, and the substrate fixing spacer 531 for locking the substrate fixing spacer 531 to the electrical component box bottom plate 51 is provided. The locking portion 531a formed on the spacer 531 is structured to protrude to the outer surface 510 side. Therefore, a predetermined interval is provided between the main body case 10 and the electrical component box 50 so that the locking portion 531a formed on the substrate fixing spacer 531 does not hit the electrical component box arrangement portion 1120 of the main body case 10. S is secured. Therefore, the height H of the convex portion 512 provided in the electric component box bottom plate 51, which is fitted in the concave portion 1120a provided in the electric component box arrangement portion 1120, is maintained in a state in which the predetermined interval S is secured. In order to attach the electrical component box 50, the height is longer than the predetermined interval S. That is, the height H of the convex portion 512 is set to a height obtained by adding the depth α of the concave portion 1120a to the predetermined interval S. As a result, of the convex portion 512, all the portions extending beyond the predetermined interval S are fitted into the concave portion 1120a.

  Next, a procedure for attaching the electrical component box 50 to the front surface 11 of the main body case 10 will be described with reference to FIG. It is assumed that the plurality of control boards 53, 53,... Are attached to the electrical component box bottom plate 51 in advance. As shown in FIG. 3B, the electrical component box bottom plate 51 is formed after the plurality of hooking claws 511 and 511 are hooked on the plurality of hooking portions 1100 a and 1100 a provided on the front surface 11 of the main body case 10. The electrical component box bottom plate 51 is supported on the main body case 10 by fitting the plurality of convex portions 512 and 512 to the plurality of concave portions 1120 a and 1120 a provided on the front surface 11 of the main body case 10. Then, alignment between the plurality of screw insertion holes 512a and 512a formed in the plurality of convex portions 512 and 512 and the plurality of screw holes 1120b formed in the plurality of concave portions 1120a and 1120a is also performed. Further, the left convex portion 512 and the screw insertion hole 513, the right convex portion 512 and the screw insertion hole 513 are in a symmetrical relationship, and the left concave portion 1120a and the screw hole 1100b, and the right concave portion 1120a and the screw hole 1100b. Therefore, the plurality of screw insertion holes 513 and 513 and the plurality of screw holes 1100b and 1100b are also aligned. In the present embodiment, the left convex portion 512 and the screw insertion hole 513, the right convex portion 512 and the screw insertion hole 513 are in a symmetrical relationship, and the left concave portion 1120a and the screw hole 1100b, and the right concave portion. 1120a and screw hole 1100b are in a symmetrical relationship, but if the plurality of screw insertion holes 513 and 513 can be aligned with the plurality of screw holes 1100b and 1100b, the positional relationship may not be symmetrical. Good.

  As a result, as shown in the Background Art section, after the electrical component box 50 is supported by the main body case 10, when the electrical component box 50 is aligned with the main body case 10, the plurality of hooks 1100 a and 1100 a itself are attached. There is no need to provide a structure for aligning the electrical component box 50. The electrical component box 50 is supported by a plurality of hooks 1100a and 1100a and a plurality of recesses 1120a and 1120a provided on the front surface 11 of the main body case 10, and the weight of the electrical component box 50 is Is not added only to the plurality of hooks 1100a and 1100a, there is no need to deform the plurality of hooks 1100a and 1100a, and it is not necessary to make the hooks 1100a and 1100a strong. Furthermore, it is not necessary to arrange a spacer or a base between the main body case 10 and the electrical component box 50, and the alignment between the main body case 10 and the electrical component box 50 is simplified.

  Next, the electrical component box bottom plate 51 includes a plurality of screw insertion holes 513 and 513, a plurality of screw holes 1100b and 1100b, and a plurality of screw insertion holes 512a and 512a and a plurality of screw holes 1120b and 1120b. Are attached to an electrical component box support portion 1100 provided in the main body case 10 and an electrical component box arrangement portion 1120 provided in the cylinder portion lead-out plate P2. As shown in FIG. 3A, the electrical component box cover 52 includes an electrical component box bottom plate 51 attached to the electrical component box support portion 1100 and the electrical component box placement portion 1120 with a plurality of screws 520, 520,. Mounted on.

  In the present embodiment, the electrical component box 50 is attached to the front surface 11 of the main body case 10, but the present invention is not limited to this. The rear surface 12 of the main body case 10 is provided with an electrical component box support portion, an electrical component box placement portion, and a maintenance hook portion so that the rear surface 12 of the main body case 10 can be attached to the rear surface 12 of the main body case 10 instead of the front surface 11 of the main body case 10. Further, an electromagnetic coil placement portion having a step from the electrical component box placement portion to the front side of the main body case 10 may be provided, and the electromagnetic coil may be attached to a cylinder portion led out from the electromagnetic coil placement portion.

  According to the switching unit 1 according to the present embodiment described above, the hooking claw 511 provided on the outer surface 510 of the electrical component box 50 is hooked on the hook portion 1100a provided in the electrical component box support portion 1100, and The convex portion 512 can be fixed to the concave portion 1120a when all of the convex portion 512 extending from the predetermined interval S (corresponding to the depth α of the concave portion 1120a) are fitted into the concave portion 1120a. . As a result, after the large and heavy electrical component box 50 is hooked on the main body case 10, it is possible to supplement the support strength of the main body case 10 when aligning the electrical component box 50 with respect to the main body case 10. . Furthermore, the main body case 10 and the electrical component box 50 can be aligned in a state where a predetermined distance S is secured between the main body case 10 and the electrical component box 50 with a simple structure. Note that the hooking portion 1100a provided in the electrical component box support portion 1100 is formed so as to open both left and right ends, but the present invention is not limited to this, and is viewed from both the left and right ends of the electrical component box support portion 1100. Further, it may be a hook portion formed of a plurality of holes formed near the center.

  Next, a state in which the electrical component box 50 is supported by the main body case 10 when maintaining the plurality of electromagnetic coils 401, 411, 421, and 431 will be described with reference to FIGS. As shown in FIGS. 7 and 8, the electrical component box bottom plate 51 is a front surface portion 111 provided on the upper case C <b> 1 of the main body case 10 with a plurality of hooking claws 511 and 511, and an electromagnetic coil placement portion 113. The electrical component box bottom plate 51 is supported by the main body case 10 by being hooked on a plurality of maintenance hooks 1110, 1110 provided in the lower vicinity of the main body case 10. Then, the plurality of electromagnetic coils 401, 411, 421, 431 arranged in the electromagnetic coil arrangement portion 113 with the electrical component box bottom plate 51 supported by the main body case 10 are exposed, and the plurality of electromagnetic coils 401, Maintenance of 411, 421, 431 becomes possible.

  According to the switching unit 1 according to the present embodiment described above, the front surface portion 111 of the main body case 10 is provided on the outer surface 510 of the electrical component box 50 when the electromagnetic coils 401, 411, 421, and 431 are maintained. A plurality of maintenance hooks 1110 and 1110 for hooking the hooks 511 and 511 are provided. As a result, there is no need to place the electrical component box 50 removed from the main body case 10 at a remote location, and a plurality of hooks 511 and 511 are hooked on a plurality of maintenance hooks 1110 and 1110. Maintenance of the electromagnetic coils 401, 411, 421, and 431 can be performed, and serviceability at the time of maintenance can be improved.

  In the present embodiment, as the refrigerant circuit unit, the switching unit 1 used in the multi-chamber air conditioner that can perform an air-conditioning-free operation has been described as an example. However, the present invention is not limited thereto, and the multi-chamber air is not limited thereto. Refrigerant circuit unit configured by combining a plurality of refrigerant pipes and a plurality of solenoid valves, such as a branch unit for branching a refrigerant pipe connected to an outdoor unit into a plurality of refrigerant pipes connected to each indoor unit. Is applicable.

DESCRIPTION OF SYMBOLS 1 Switching unit 10 Main body case 11 Front surface 110, 111, 112 Front surface part 1100 Electrical component box support part 1100a Hook part 1100b Screw hole 1110 Maintenance hook part 1120 Electrical component box arrangement part 1120a Recessed part 1120b Screw hole 1120c Flange part 113 Electromagnetic Coil placement portion 113a Hole 113b Flange portion 12, 120, 121, 122 Rear surface 122a, 122b Notch portion 13 Upper surface 130 Upper surface portion 131 Inlet 14 Lower surface 140 Lower surface portion 15 Left side surface 150, 151 Left side surface portion 150a, 150b, 150c, 151a, 151b, 151c Notch 150d, 151d Flange 16 Right side 160, 161 Right side 161a, 161b, 161c Notch 160d, 161d Flange 17 Upper partition plate 17b Notch 1 8 Lower partition plate 18a, 18b, 18c Notch 20 Hanging bracket 30 High-pressure gas connection pipe (part of refrigerant piping)
31 Low pressure gas connection pipe (part of refrigerant pipe)
32 Liquid connection pipe (part of refrigerant pipe)
33 Gas connection pipe (part of refrigerant pipe)
34 Liquid connection pipe (part of refrigerant pipe)
40, 41, 42, 43 On-off valve 400, 410, 420, 430 Valve body 401, 411, 421, 431 Electromagnetic coil 401a, 411a, 421a, 431a Hole 402, 412, 422, 432 Cylinder section 50 Electrical component box 51 Electrical component Product box bottom plate 510 External surface 511 Hook nail 512 Protruding part 512a Screw insertion hole 513 Screw insertion hole 514 Screw 52 Electrical component box cover 520 Screw 53 Control board 531 Substrate fixing spacer 531a Locking part C1 Upper case C2 Lower case H Convex part Height of 512 P1 Refrigerant pipe outlet plate P2 Cylinder part outlet plate PG Gas refrigerant pipe group PG1, PG2, PG3, PG4 Gas refrigerant pipe group PL Liquid refrigerant pipe group S Main body case 10 Predetermined to be secured to electrical component box 50 Interval α Depth of recess 1120a S30, S300, S31, S 310, S32, S320, S33, S34 Seal member U1 Refrigerant piping unit V1 Upper on-off valve group V2 Lower on-off valve group

Claims (2)

A refrigerant pipe unit composed of a plurality of refrigerant pipes, a plurality of electromagnetic valves comprising an electromagnetic coil and a valve main body connected to the refrigerant pipe, and a main body case formed in a box shape that accommodates the refrigerant pipe unit And an electrical component box that houses a control board that controls the opening and closing of the electromagnetic valve, and is a refrigerant circuit unit provided between one or a plurality of outdoor units and a plurality of indoor units,
Among the refrigerant pipes, the refrigerant pipe connected to the pipe extending from the indoor unit is led out from the back surface of the main body case,
Among the refrigerant pipes, refrigerant pipes connected to pipes extending from the outdoor unit are led out from the left side surface and the right side surface of the main body case,
The cylinder portion of the valve body is led out from the front surface of the body case,
The front portion of the main body case includes an electrical component box support portion that supports the electrical component box and an electrical component box placement portion that places the electrical component box,
On the front side of the main body case, an electromagnetic coil arrangement portion for arranging the electromagnetic coil formed with a step on the back side of the main body case from the electrical component box arrangement portion is provided.
The electromagnetic coil is attached to the cylinder part derived from the electromagnetic coil arrangement part,
The electrical component box support portion includes a hook portion formed to open both left and right ends,
The electrical component box arrangement portion includes a plurality of recesses,
The surface of the electrical component box facing the front portion of the main body case is provided with a hooking claw that is hooked on the hook portion at a position facing the hook portion when attached to the front portion of the main body case,
A protrusion corresponding to the recess and having a height extending from a predetermined interval secured between the main body case and the electrical component box at a position corresponding to the recess;
The hook can be hooked on the hook, and the convex portion can be fixed to the concave portion when all of the convex portion extending beyond the predetermined interval are fitted into the concave portion. A refrigerant circuit unit characterized by comprising:   A maintenance hook part for hooking the hooking claws provided in the electrical component box is provided near the lower part of the electromagnetic coil arrangement part on a front surface part of the main body case. Item 2. The refrigerant circuit unit according to Item 1.

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