JP2006194532A - Outdoor machine of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor machine of an air conditioner hardly causing failure and having high maintainability. <P>SOLUTION: A first circuit board 61 with a circuit pattern surface formed on one side thereof is mounted horizontally to a bottom plate 41; a second circuit board 62 with circuit pattern surfaces formed on both surfaces thereof is mounted vertically to a back plate 62; and a heat sink 65 for dissipating heat is mounted in a part of the back plate 42. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to a technique that contributes to downsizing and improving maintainability of an electrical component box mounted in the outdoor unit.

  Most of the air conditioners are split-type air conditioners in which indoor units and outdoor units are separated. Split type air conditioners have many advantages over integrated air conditioners, such as not having a large hole in the wall or using a window frame.

  For example, as shown in Patent Document 1, an outdoor unit of an air conditioner includes a box-shaped outdoor unit main body, the inside of which includes a heat exchange chamber in which a heat exchanger, a blower fan, and the like are stored via a partition plate, and a compression It is divided into a machine room in which machines and electrical equipment boxes are stored.

  Usually, the electrical component box is held by the upper side of the partition plate, and a circuit board in which a power supply circuit, a control circuit, and the like are incorporated, and various electronic components are housed therein. Conventionally, the circuit board is held horizontally inside the electrical component box, and a cover is attached to the upper surface side.

  However, when the circuit board is placed horizontally, there are the following problems. That is, as shown in Patent Document 1, when a circuit board is placed horizontally, if a circuit pattern is formed on the upper surface side, dust or the like accumulates on the circuit pattern, which may cause a short circuit or a tracking fire. . It is also susceptible to water drops and salt damage.

  As a method for solving such a problem, for example, Patent Document 2 discloses a technique for laying out a circuit board in a vertical position. According to this, since the circuit board is placed vertically, there is no accumulation of dust, and further, maintenance work can be facilitated by unitizing the circuit board.

  However, the method described in Patent Document 2 has the following problems. That is, the electrical component box is installed in a limited space between the compressor and the ceiling panel. Therefore, it is necessary to use a double-sided circuit board having circuit pattern formation surfaces formed on both sides in order to arrange the circuit board vertically as in Patent Document 2. However, the double-sided board has a smaller installation area than the single-sided board, but the production cost is high.

  As another problem, since Patent Documents 1 and 2 cover the upper opening of the electrical component box with a cover, it is necessary to remove the ceiling panel during maintenance, but the outdoor unit is suspended from the ceiling such as a veranda. When it was lowered, it was necessary to remove the outdoor unit and lower it down to see inside the electrical component box.

JP 2003-156233 A Japanese Patent Laid-Open No. 5-79661

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an outdoor unit for an air conditioner that is less likely to break down and has good maintainability at low cost.

  In order to achieve the above-described object, the present invention has several features described below. According to the first aspect of the present invention, there is provided an outdoor unit main body that is partitioned into a machine room including a compressor and an electrical component box and a heat exchange chamber including a heat exchanger and a blower fan via a partition plate. An air conditioner outdoor unit in which a control circuit board on which driving electronic components are mounted is housed in the electrical component box, wherein the control circuit board is placed horizontally in the electrical component box. The first circuit board is a single-sided board, the second circuit board is a double-sided board, and the first circuit board is divided into a first circuit board and a second circuit board placed vertically. It is characterized by being arranged with the back side facing upward, and the electrolytic capacitor included in the electronic component for driving is mounted on the back side.

  According to a second aspect of the present invention, in the first aspect, the electrical component box includes a bottom plate that supports the first circuit board and a back plate that supports the second circuit board, and a front surface and an upper surface are open. The inverter case is provided with a cover that covers the inverter case.

  According to a third aspect of the present invention, in the first or second aspect, the electrolytic capacitor is disposed near the opening of the inverter case of the first circuit board.

  According to a fourth aspect of the present invention, in the first, second, or third aspect, a heat generating component is mounted on the second circuit board, and a heat sink that dissipates heat generated from the heat generating component on the back plate. It is characterized by being attached.

  According to the first aspect of the present invention, the circuit board is divided into a first circuit board (single-sided board) placed horizontally and a second circuit board (double-sided board) placed vertically, so that The amount used can be reduced and the production cost can be reduced. In addition, the back surface of the single-sided substrate as used in the field of this invention means the anti-pattern formation surface of a single-sided substrate.

  In addition, by arranging the circuit pattern forming surface of the single-sided substrate so as to face the bottom plate, the circuit pattern molding surface is not exposed to the front side, so that short circuit and tracking can be prevented. Further, even if the capacitor leaks, the circuit pattern is not affected.

  According to the second aspect of the present invention, when the front and top surfaces of the electrical component box are formed as openings, for example, when the outdoor unit is suspended and held from the ceiling surface by a veranda of an apartment, the ceiling surface and the outdoor unit Even when there is no space between the top and the top, the inside of the electrical component box can be seen from the front, so that the maintenance of the electrical component box can be performed without lowering the outdoor unit main body.

  According to the third aspect of the present invention, by mounting the electrolytic capacitor on the front end side on the back surface side of the single-sided substrate, heat can be effectively radiated to the outside.

  According to the fourth aspect of the present invention, not only can the heat sink be efficiently provided by providing the heat sink on the back plate portion, but also the heat sink is exposed to the outside from the partition plate, so that heat is generated in the electrical component box. Heat can be radiated more efficiently without trapping. Moreover, since the heat sink is attached to the back side of the electrical component box, the electrical component box can be removed to the near side.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an outdoor unit of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a plan view of the outdoor unit with a ceiling panel removed.

  Here, since the specific configuration of the indoor unit of the air conditioner in the present invention is an arbitrary matter, only the outdoor unit will be described below, and the indoor unit is not illustrated and will not be described. .

  This air conditioner (outdoor unit) has a box-shaped outdoor unit body 100, and inside the outdoor unit body 100, a compressor 1, a heat exchanger 2 and a blower fan 3 (see FIG. 3) included in the refrigeration cycle. ) And an electrical component box 4 as a control system thereof are housed.

  Referring to FIG. 1, an outdoor unit main body 100 is installed on a grounded surface, a base panel 110, a pair of left and right side panels 120 and 130 erected from the base panel 110, and a front surface of the outdoor unit main body. And a ceiling panel 150 that covers the side panels 120 and 130 and the upper end side of the front panel 140.

  In addition, since the specific structure about the material of each panel, a shape, a magnitude | size, etc. is arbitrary matters in this invention, the description is abbreviate | omitted.

  The interior of the outdoor unit main body 100 is partitioned into a heat exchange chamber 100A and a machine room 100B by a partition plate 200, and the heat exchanger 2 and the blower fan 3 are disposed in the heat exchange room 100A. The machine room 100B Inside, a compressor 1 and an electrical component box 4 are arranged.

  As shown in FIG. 3, the partition plate 200 is formed by press-molding one metal plate, and is formed in an L shape so as to surround the compressor 1 installed on the base panel 110. A notch 210 for exposing a heat sink 65 (described later) attached to a part of the electrical component box 4 to the heat exchange chamber 100 </ b> A side is provided at the upper end of the partition plate 200.

  The notch 210 is formed by a notch groove extending downward from the upper end of the partition plate 200 and has an opening size substantially the same as the outer size of the heat sink 65. A heat sink 65 is fitted along the notch 210. Thereby, the space between the heat exchange chamber 100A and the machine room 100B is partitioned.

  The heat exchanger 2 is formed in an L shape, and is arranged along one side surface from the back surface of the outdoor unit 100. In this example, the heat exchanger 2 is integrally formed in an L shape. However, the rear heat exchanger unit and the side heat exchanger unit are divided and integrally connected to the L shape. May be. The specific configuration of the heat exchanger 2 is an arbitrary matter.

  As shown in FIG. 3, the blower fan 3 is an axial fan that sucks air from the back of the outdoor unit main body 100 and blows it out toward the front. As shown in FIG. 1, the blower fan 3 is supported by a fan mounting base 160. Has been.

  Referring to FIG. 4, an electrical component box 4 includes an inverter case 40 in which various electrical components such as air conditioner power supplies and control boards are housed, and a cover 50 that is detachable from the inverter case 40. And is supported by the partition plate 200 so as to be arranged on the upper side of the compressor 1 in the machine room 100B.

  In this example, the inverter case 40 and the cover 50 are made by bending a metal plate such as stainless steel, but may be made of, for example, a synthetic resin, and the material and molding method are not particularly limited.

  The inverter case 40 includes a substantially horizontal bottom plate 41, a back plate 42 bent at a substantially right angle from the back surface of the bottom plate 41, and a pair of side plates 43 and 44 formed so as to close the side surfaces of the bottom plate 41 and the back plate 42. I have.

  The cover 50 is formed in an L shape having an upper surface cover 51 for covering the upper surface opening of the inverter case 60 and a front cover 52 for covering the front opening of the inverter case 50.

  At the upper end of the back plate 42 of the inverter case 140, a locking flange 42 a that is hooked on the upper end surface of the partition plate 200 is provided. Further, the side plates 43 and 44 are also formed with locking flanges 45 and 46 disposed along the upper end surface of the partition plate 200.

  First locking holes 47 and 47 into which the first locking ribs 53 and 53 of the cover 50 are inserted are formed in the locking flanges 45 and 46, respectively. At the tip of the bottom plate 41, second insertion holes 48, 48 into which the second locking ribs 54, 54 of the cover 50 are inserted are formed.

  One locking flange 46 is further formed with a temporary fixing rib 49 as a temporary fixing means for the right side panel 130. In the present invention, the configuration of the temporary fixing rib 49 is an optional matter. Description is omitted.

  In this example, the second locking ribs 54, 54 project from the lower end of the front cover 52 in an L shape. That is, by releasing the first locking ribs 53, 53 from the first insertion holes 47, 47 and rotating the cover 50 in the front direction around the second locking ribs 54, 54, the box cover 50 is removed. The interior of the electrical component box 4 can be viewed from the front while being hooked on the electrical component box 4.

  According to this, even when there is no space between the ceiling surface and the top surface of the outdoor unit when the outdoor unit is suspended and held from the ceiling surface, for example, on a veranda of an apartment house, from the front Since the inside of the electrical component box 4 can be seen, maintenance work of the electrical component box 4 can be performed without lowering the outdoor unit main body 100 one by one.

  In this embodiment, the side plates 43 and 44 are integrally formed on the inverter case 40 side, but may be integrally formed on the cover 50 side. That is, if the internal case is sealed by combining the inverter case 40 and the cover 50, these modified examples are included in the present invention.

  Various electrical components are accommodated in the electrical component box 40. As shown in FIG. 4, the first circuit board 61 is provided in a substantially horizontal state on the bottom plate 41 of the inverter case 40, and the second circuit board is provided substantially vertically on the back plate 42. In this example, the first circuit board 61 is a power circuit board, and the second circuit board 62 is a control circuit board.

  The first circuit board 61 is a single-sided board with a circuit pattern forming surface formed on one side, and the circuit pattern forming surface is on the bottom plate 41 side (see FIG. It is installed so that it faces the lower side.

  Three electrolytic capacitors 63 are mounted on the first circuit board 61 in this example. The electrolytic capacitor 63 is mounted on the back surface (non-pattern forming surface) side of the first circuit board 61, and the terminal portion is connected to the circuit pattern through a through hole (not shown).

  Since the electrolytic capacitor 63 is a heat-generating component, the electrolytic capacitor 63 is placed on the front opening side of the inverter case 40 so that heat can be effectively dissipated without the heat stored in the inverter case 40. It is preferable that it is mounted.

  The control board 42 is a double-sided board on which circuit patterns are formed on both sides, on which various control electronic components are mounted. A heat generating component 64 such as a power transistor constituting an inverter circuit is mounted on a part of the back surface side (the back surface of the paper in FIG. 4) of the second circuit board 62.

  A heat sink 65 for releasing heat generated from the heat generating component 64 is attached to the back plate 42. One surface of the heat sink 65 is in contact with the heat generating component 64, and the other surface is formed with a heat radiating surface provided with a large number of radiating fins, and is disposed outside the back plate 42.

  The heat sink 65 is disposed so that the heat receiving surface is located opposite to the heat generating component 64 with the back plate 42 interposed therebetween. According to this, the heat generated by the heat generating component 64 can be efficiently radiated to the outside by the heat sink 65.

In this embodiment, the heat sink 65 is provided on the back plate 42. However, for example, the heat sink 65 may be provided on the side plate 43 side, and if the notch 210 is formed at a position corresponding to the heat sink 65 of the partition plate 200, The installation position is not particularly limited.

  As described above, according to the present invention, the circuit board is divided into the first circuit board horizontally placed and the second circuit board vertically placed, and these are provided on the bottom plate and the back plate of the electrical component box. Accordingly, it is possible to provide an outdoor unit for an air conditioner that prevents short circuit and tracking fire, has high safety, and has good maintenance workability.

The disassembled perspective view of the outdoor unit of the air conditioner which concerns on one Embodiment of this invention. The top view of the outdoor unit main body of the state which removed the ceiling panel. The perspective view of the state which attached the ventilation fan and the partition plate to the base panel. The exploded perspective view of an electrical component box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Heat exchanger 3 Blower fan 4 Electrical component box 40 Inverter case 41 Bottom plate 42 Back plate 43,44 Side plate 50 Cover 61 1st circuit board (single-sided board)
62 Second circuit board (double-sided board)
63 Electrolytic capacitor 64 Heat-generating component 65 Heat sink 100 Outdoor unit body 100A Machine room 100B Compression chamber 200 Partition plate 210 Notch

Claims (4)

It has an outdoor unit body that is partitioned into a machine room including a compressor and an electrical component box, and a heat exchange chamber including a heat exchanger and a blower fan via a partition plate, and is driven into the electrical component box. In the outdoor unit of the air conditioner in which the control circuit board on which the electronic components are mounted is stored,
The control circuit board is divided into a first circuit board that is placed horizontally in the electrical component box and a second circuit board that is placed vertically, and the first circuit board is a single-sided board, The second circuit board is a double-sided board, and the first circuit board is disposed with the back side facing upward, and an electrolytic capacitor included in the driving electronic component is mounted on the back side. The outdoor unit of the air conditioner according to claim 1.   The electrical component box includes an inverter case including a bottom plate that supports the first circuit board and a back plate that supports the second circuit board, the front surface and the upper surface being opened, and a cover that covers the inverter case The outdoor unit of the air conditioner according to claim 1, wherein   The outdoor unit of an air conditioner according to claim 1 or 2, wherein the electrolytic capacitor is disposed near the opening of the inverter case of the first circuit board.   4. The heat generating component is mounted on the second circuit board, and a heat sink for dissipating heat generated from the heat generating component is attached to the back plate. Air conditioner outdoor unit.

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