JP6188431B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner equipped with a control device having a large winding component.

  Conventionally, electrical components that constitute an inverter circuit, a harmonic suppression circuit, and the like for driving a motor of a compressor are accommodated in an air conditioner. A relatively large winding component (reactor) is included as an electrical component accommodated in the outdoor unit, and the winding component and other electronic components are accommodated in the control box. Housed in a housing.

  Since the electrical components housed in the control box generate heat when the air conditioner is driven, as represented by large winding components, it is preferable to radiate these electrical components. In view of this, it has been proposed to arrange a control device in which an inverter circuit or the like is accommodated on the air blowing path using the fact that an air path is formed in the air conditioner (see, for example, Patent Document 1). In Patent Document 1, the inverter main device and the harmonic suppression circuit are arranged on the air passage of the refrigerant circuit that blows air to the evaporator of the air conditioner, and the inverter main device and the harmonic suppression circuit can dissipate heat by blowing air. It is disclosed.

Japanese Patent Laid-Open No. 11-75363 (see paragraph 0053, FIG. 2)

  Of the electrical components housed in the control box, the heat generation from the large winding components is greater than that of other electrical components, and it is desired to mainly cool the winding components. However, in patent document 1, since it is the structure by which ventilation is performed with respect to the box in which the inverter main apparatus and the harmonic suppression circuit were accommodated, it cannot cool a winding component efficiently. On the other hand, it is conceivable to blow the inside of the control box in order to blow the wind directly on the winding parts. However, there is a possibility that a problem may occur due to dust, dust, etc., so it is not possible to blow into the control box.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an air conditioner capable of efficiently cooling a winding component.

The air conditioner of the present invention is disposed at a position adjacent to the air passage in the housing, the housing in which the air passage is formed, the fan that is attached to the housing, and blows air into the air passage. and a control device for controlling the operation, the controller, possess a control box control board is accommodated, and a winding part from the outer surface of the control box is arranged to project into the air passage, the winding parts The housing is housed in a case that is detachably attached to the control box, and is disposed so as to protrude toward the air passage while being housed in the case, and the case has a periphery of the opening for housing the winding parts. A flange portion is provided, the control box has a hole for inserting the case, and the case is inserted into the hole from the inner surface side of the control box and is fixed to the control box at the flange portion .

  According to the air conditioner of the present invention, since the winding component protrudes from the control box and is disposed in the air passage, the winding component can be efficiently cooled.

It is an external appearance perspective view which shows Embodiment 1 of the air conditioning apparatus of this invention. It is a perspective view which shows an example of the control apparatus mounted in the air conditioning apparatus of FIG. It is a disassembled perspective view which shows an example of the coil | winding components and case attached to the control box of FIG. It is a top view which shows an example of the coil | winding components and case attached to the control box of FIG. It is a perspective view which shows an example of the case of FIG. It is a perspective view which shows an example of the case of FIG. It is sectional drawing which shows an example of the coil | winding components and case of FIG. It is sectional drawing which shows an example of the coil | winding components and case of FIG. It is a perspective view which shows a mode that the winding components and case of FIG. 3 are attached to a control box. It is a cross-sectional schematic diagram which shows the periphery site | part of the fixing member which fixes the flange part of FIG. It is a top view which shows an example of the obstruction board of FIG. It is sectional drawing which shows the connection site | part of the case of FIG. 9, and a control box. It is sectional drawing which shows the connection site | part of the case of FIG. 9, and a control box. It is a perspective view which shows Embodiment 2 of the case in the air conditioning apparatus of this invention.

Embodiment 1. FIG.
Hereinafter, embodiments of an air-conditioning apparatus of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view showing Embodiment 1 of the air conditioning apparatus of the present invention. An air conditioner 1 in FIG. 1 is an outdoor unit that performs heating or cooling, for example, and includes a housing 2, a fan 3, and a control device 10. The housing 2 accommodates, for example, a compressor and a heat exchanger that constitute a refrigeration cycle, and the housing 2 is formed with an air passage 2A serving as a wind passage for sending air to the heat exchanger. Yes. The fan 3 blows air into the air passage 2 </ b> A formed in the housing 2, and is attached to the upper portion of the housing 2, for example. When the fan 3 is rotationally driven, air flows from the lower side to the upper side in the air passage 2A.

  FIG. 2 is a perspective view illustrating an example of a control device mounted on the air conditioner of FIG. 1, and the control device 10 will be described with reference to FIGS. 1 and 2. The control device 10 controls the air conditioner 1, and includes control boards 10 </ b> A to 10 </ b> C, a control box 11, and a winding component 20. The control boards 10 </ b> A to 10 </ b> C are boards on which, for example, an inverter circuit and a harmonic suppression circuit are formed together with the winding component 20, and are accommodated in the control box 11. The control box 11 is disposed at a position adjacent to the air path 2A in the housing 2 so that the wind flows on the back surface 11A side of the control box 11. The winding component 20 is a large reactor in which a conductive wire is wound around a coil bobbin, and is disposed so as to protrude from the rear surface 11A of the control box 11 to the outer surface side. Since the back surface 11A of the control box 11 is adjacent to the air passage 2A, the winding component 20 is in a state of being disposed in the air passage 2A. And cooling is performed when the wind which flows through 2 A of air paths hits the winding components 20 directly.

  Here, when the winding component 20 is exposed and placed in the air passage 2A, various problems such as leakage of rainwater and corrosion of metal conductors occur, so that electrical products are protected from external factors such as rainwater. There is a need to. Therefore, the winding component 20 is disposed on the back surface 11A side of the control box 11 in a resin-molded state.

  3 is an exploded perspective view showing an example of a winding component and a case attached to the control box of FIG. 2, and FIG. 4 is a plan view showing an example of the winding component and a case attached to the control box of FIG. is there. As shown in FIGS. 3 and 4, the winding component 20 is attached to the control box 11 while being resin-molded with a filler 40 in the case 30. In other words, the winding component 20 is formed into a molded coil by the filler 40 (interior resin), and the entire winding component 20 and the filler 40 are molded by the case 30 (exterior). .

  The case 30 is detachably attached to the back surface 11A of the control box 11, and serves as a cover for protecting the winding component 20 from external factors. Since the case 30 may be exposed to ultraviolet rays and oil components in addition to rainwater in the air passage 2A, the case 30 is preferably made of a material having weather resistance and oil resistance, and is made of, for example, a resin or a metal material.

  5 and 6 are perspective views showing an example of the case of FIG. The case 30 of FIGS. 5 and 6 includes a winding accommodating portion 31 that accommodates the winding component 20, and a flange portion 32 that protrudes outward at the periphery of the opening 31A. The winding accommodating portion 31 has a hollow portion for accommodating the winding component 20, and the hollow portion has a shape that matches the outer shape of the winding component 20. In particular, the winding component 20 is provided with three protrusions 21 (see FIG. 3), and the winding accommodating part 31 is provided with three attachment guide parts 31P for accommodating the protrusions 21. Then, the protrusion 21 of the winding component 20 is fitted into the mounting guide portion 31 </ b> P, and the winding component 20 is positioned and fixed at a predetermined position of the winding accommodating portion 31. Further, radial ribs for securing the strength of the case 30 are formed on the outer surface side of the bottom portion 31B of the winding housing portion 31.

  7 and 8 are cross-sectional views showing examples of the winding component and case of FIG. As shown in FIGS. 7 and 8, a filler 40 is filled between the winding component 20 and the winding accommodating portion 31. The filler 40 is made of, for example, silicon resin and has a function of conducting heat generated from the winding component 20 to the case 30 side. The filler 40 is injected into the winding accommodating part 31 from one resin injection gate 33 provided at the center of the bottom part 31B of the case 30, for example. As described above, by providing the resin injection gate 33 at the center of the bottom portion 31B, it is possible to suppress the generation of weld lines during resin molding and to improve the strength of the resin. In addition, the winding component 20 is provided with wiring 22 for electrically connecting to the control boards 10A to 10C.

  Here, the case 30 described above may be made of a metal material having good thermal conductivity. However, if a metal material is used, an insulation distance from the winding component 20 is required, and therefore the use of the filler 40 is used. The amount may increase and the heat transfer distance may become longer. Therefore, in order to shorten the heat transfer distance, reduce the amount of the filler 40 used, and improve the heat transfer property, the case 30 is preferably formed using a cured resin such as PPS (polyphenylene sulfide).

On the other hand, when the case 30 is made of a cured resin such as PPS (polyphenylene sulfide) and the filler 40 is made of silicon resin, a stress load due to thermal expansion is applied from the filler 40 to the case 30. Specifically, the thermal expansion coefficient of silicon resin is 3.0 × 10 ⁻⁴ / K, whereas the thermal expansion coefficient of PPS (polyphenylene sulfide) is 2.4 × 10 ⁻⁵ / K, and the thermal expansion coefficient is About one digit different. Therefore, when the winding component 20 generates heat, the filler 40 expands more than the case 30. As a result, stress from the filler 40 is generated on the inner wall of the winding accommodating portion 31. At this time, in the winding accommodating portion 31, the inner surface that contacts the filler 40 is formed of a curved surface having a large curvature. Therefore, even when the above-described resin is used for the case 30 and the filler 40, the stress is reduced. The strength can be ensured by eliminating concentrated points.

  The flange portion 32 protrudes outward at the periphery of the opening 31A, and has a plurality of holes for allowing the fixing member 50 such as a screw to pass therethrough. The flange portion 32 is fixed to the back surface 11 </ b> A side of the control box 11 using the fixing member 50, whereby the winding component 20 and the case 30 are fixed to the control box 11. Thus, the case 30 serves as an attachment structure when attaching the winding component 20 to the control device 10.

  9 is a perspective view showing a state where the winding component and the case of FIG. 3 are attached to the control box, and FIG. 10 is a schematic cross-sectional view showing a peripheral portion of the fixing member for fixing the flange portion of FIG. As shown in FIGS. 9 and 10, the control box 11 is formed with a hole 12 having substantially the same shape as the outer shape of the winding accommodating portion 31, and the case 30 extends from the inner surface side of the back surface 11 </ b> A to the hole 12. Inserted. At that time, the sealing material 34 having the same shape as the hole 12 is sandwiched between the control box 11 and the case 30 to prevent water from entering the control box 11 from the hole 12. Thereafter, the flange portion 32 is fixed to the back surface 11A from the inner surface side by a fixing member 50 such as a screw. As shown in FIG. 10, the fixing member 50 is waterproofed to prevent water from entering the control box 11 from the screw holes. As described above, the mounting operation of the case 30 is performed from the inner surface side of the control box 11. Usually, components such as the control boards 10A to 10C mounted on the control device 10 are structured to be attached from the inner surface side. Therefore, when attaching the winding component 20 and the case 30 as well as other components, The one-way work from can be performed, and the work efficiency can be improved.

  Further, as shown in FIG. 7, a closing plate 60 that covers the hole 12 and the case 30 is attached to the inner surface of the back surface 11 </ b> A of the control box 11. FIG. 11 is a schematic plan view showing an example of the closing plate 60. 11 is a plate-like member having an opening 61 through which the wiring 22 of the winding component 20 passes, and is fixed on the hole 12 and the case 30 with screws or the like. The closing plate 60 separates the internal space in which the control boards 10A to 10C of the control box 11 are disposed from the space in which the winding component 20 and the case 30 are disposed. By providing the closing plate 60, water can be reliably prevented from entering the control box 11. That is, since the case 30 is exposed on the air passage 2A, it is exposed to rainwater or the like. On the other hand, since the control box 11 and the case 30 are made of different members, there is a case where a gap is generated between the control box 11 and the case 30, and rainwater enters from the gap. 12 and 13 are schematic cross-sectional views showing a water intrusion route when a gap is generated between the control box 11 and the case 30. FIG. Since a plurality of electrical components are mounted on the control device 10, it is necessary to have a structure in which rainwater does not enter into the arrangement space of the electrical components in order to protect them from water. Therefore, even when water enters the rainwater intrusion path along the outline of the case 30, since the closing plate 60 is isolated from the arrangement space of the electrical components in the control box 11, the water enters the control box 11. Can be prevented from entering.

  As described above, by arranging the winding component 20 that is a heating element in the air passage 2A of the air conditioner 1, the cooling performance of the winding component 20 is improved, and the heating element such as the large winding component 20 is small. It is possible to reduce the weight. In addition, since the winding component 20 is resin-molded with the filler 40 and accommodated in the case 30, water or dust is placed on the winding component 20 even when it is disposed on the air path 2A. It is possible to prevent the occurrence of problems due to the above. Furthermore, when the case 30 is inserted into the hole 12 from the inner surface side of the control box 11 and is fixed to the control box 11 at the flange portion 32, the work efficiency when installing the winding component 20 can be improved. it can. Further, when the control box 11 is provided with a closing plate 60 that closes the case 30 and the hole 12, it is possible to reliably prevent water from entering the control box 11.

Embodiment 2. FIG.
FIG. 14 is a perspective view showing Embodiment 2 of the case in the air-conditioning apparatus of the present invention, and the case 130 will be described with reference to FIG. In FIG. 14, parts having the same configuration as those of the air conditioner of FIGS. 1 to 13 are denoted by the same reference numerals and description thereof is omitted. The case 130 of FIG. 14 differs from the case 30 of FIGS. 1 to 13 in that a guide portion 131 that guides the flow of water is provided in the flange portion 32.

  Specifically, on the upper surface of the flange portion 32, a guide portion 131 that is formed from the inner peripheral side of the flange portion 32 toward the outer peripheral side and guides the flow of water is provided. The guide portion 131 has a shape protruding from the upper surface of the flange portion 32 by about 3 to 5 mm. When rainwater enters the inside of the control box 11 from the screw hole, the water is guided from the inner peripheral side of the flange portion 32 to the outer peripheral side along the guide portion 131 and discharged.

  As described above, when the guide part 131 that guides the flow of water is formed in the flange part 32, when the mounting structure efficiently cools the winding component 20, the water is on the inner surface side of the control box 11. Even in the case of winding around, the guide part 131 can protect the winding component 20, which is an electrical component, from water. Furthermore, when the above-described closing plate 60 is attached in addition to the guide portion 131, it is possible to reliably prevent the sneak-in water from flowing into the control box 11.

  The embodiment of the present invention is not limited to the above embodiment. For example, FIG. 5 and FIG. 6 illustrate the case where the outer shape of the case 30 is formed in a columnar shape. However, in order to improve the heat dissipation characteristics of the case, a heat sink (heat sink) is provided on the outer peripheral surface of the case 30. It may be installed. Moreover, in Embodiment 1, 2, although the case where the winding components 20 were accommodated in the case 30 was illustrated, it is arrange | positioned in the air path 2A in the state resin-molded without using the case 30. There may be. Further, in the first and second embodiments, the case where the winding component 20 and the case 30 are inserted into the hole 12 of the control box 11 from the inner surface side and fixed is illustrated, but the control box 11 has a wiring hole. You may make it open and let wiring pass. Even in this case, since the winding component 20 and the case 30 can be disposed in the air passage 2A, the winding component 20 can be efficiently cooled.

  DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus, 2 housing | casing, 2A air path, 3 fan, 10 control apparatus, 10A-10C control board, 11 control box, 11A back surface, 12 holes, 20 winding components, 30, 130 cases, 31 winding accommodation Part, 31A opening, 31B bottom part, 31P mounting guide part, 32 flange part, 33 resin injection gate, 34 sealing material, 40 filler, 50 fixing member, 60 closing plate, 61 opening, 131 guide part.

Claims (4)

A housing in which an air passage is formed;
A fan attached to the housing and blowing air into the air passage;
A control device that is disposed at a position adjacent to the air passage in the housing and controls the operation of the device;
The controller is
A control box containing a control board;
Possess a coil component disposed to protrude into the air passage from the outer surface of the control box,
The winding component is housed in a case that is detachably attached to the control box, and is disposed so as to protrude toward the air path in a state of being housed in the case,
The case is provided with a flange at the periphery of the opening for accommodating the winding component,
The control box has a hole for inserting the case,
The said case is an air conditioning apparatus which is inserted in the said hole from the inner surface side of the said control box, and is being fixed to the said control box in the said flange part .   The air conditioner according to claim 1, wherein the winding component is resin-molded. The surface of the inner side of the control box of the flange portion, claim 1, characterized in that it comprises a guide portion for guiding the flow from the inner peripheral side is formed toward the outer periphery side, of the water of the flange portion Or the air conditioning apparatus of 2. The air conditioner according to any one of claims 1 to 3, wherein the control box is provided with a closing plate that closes the case and the hole.

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