JP2005133996A - Electric component for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric component formed into a flexible shape corresponding to a required minimum spatial shape in an air conditioner, with electronic control parts having higher mounting density, smaller size and lower cost. <P>SOLUTION: The electric component 40 for the air-conditioner comprises an integrated printed wiring board 41 on which a plurality of circuit wiring patterns and board dividing grooves 45 are arranged for dividing a control circuit in the electric component, and signal connection wiring materials 42 between the electronic control part 44 and the divided circuit wiring pattern is mounted and soldered on the printed wiring board and then divided. The control circuit and the electronic controlled parts for the electric component are spatially arranged along the boxed shape of the electric component. Thus, the number of mounting working processes for the electronic controlled parts is reduced, and the electric component is formed into a shape corresponding to a spatial shape in the air conditioner with inexpensive printed wiring only applied for the wiring board. Besides, the electronic controlled parts have higher mounting density, resulting in smaller size and lower cost. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electrical component incorporating an electronic control component and a printed wiring board, and an air conditioner including the electrical component.

  An example of an outdoor unit electrical component of an air conditioner will be described with reference to FIG. In the electrical component, a printed wiring board 41 on which electronic control components are mounted and soldered is stored in an insulating resin case 47 that is molded in advance along the inner shape of the electrical component box, and the outer side is further in the outer casing 48 of the electrical component. In addition, the electronic control component and the printed wiring board are protected by the electrical component lid 49. When printed circuit boards are inexpensive, a single-sided wiring board is used in a limited range with a large-scale control circuit. A multilayer wiring board is used, but in order to reduce the wiring of large and heavy components in advance. It is mounted on the same substrate as a small electronic control component on a single printed wiring board. Since the printed wiring board uses a hard base material and cannot be three-dimensionally arranged by bending or the like, generally, the electrical component outer box 48 and the resin case 47 are made of a single printed wiring board. It has a simple cubic shape to match the shape of the.

  Next, a known technique (for example, refer to Patent Document 1) regarding a miniaturized structure of an electrical component will be described with reference to FIGS. The printed circuit board is not used, and the wiring between the synthetic resin boards (molded circuit boards) 10 is performed by the press pattern 15, and after mounting the components arranged on the molded circuit board in the same plane state of FIG. As shown in FIG. 4, a synthetic resin substrate is formed in a box shape and serves as an electrical component box structure, thereby reducing the size and price. In addition, in an electrical component unit based on a known technique (for example, see Patent Document 2) in which components are mounted in advance on independent printed wiring boards 1 and molded wiring boards 2 and 3, a wiring frame is resin-molded and provided on the wiring frame. And a printed wiring board in which the pins of the wiring frame of the mold wiring board are connected to the pattern electrodes. Mount components for high-voltage, high-current circuits on the molded wiring board, mount other components on the printed wiring board, and connect the pins of the wiring frame of the molded wiring board to the pattern electrodes on the printed wiring board. As a result, high-density mounting is possible, and connection wiring that connects the large component and the printed wiring board can be eliminated, so that the number of work steps can be reduced, and the size and cost can be reduced.

Japanese Patent No. 3086623 (page 4, FIGS. 2 and 3) Japanese Patent Laid-Open No. 2001-111191 (page 6, FIG. 1)

  In the electrical component structure of FIG. 2, the control circuit of the electrical component is arranged on one printed wiring board, and all electronic control components from heavy components to small and lightweight components are arranged on the same substrate on the same plane. The plane shape of the product box is larger than the plane size of the printed circuit board, and the height is limited by the height of the largest electronic control component mounted on the board, so electrical components that match the minimum required space shape in the air conditioner It is difficult to reduce the size because the shape cannot be formed.

  3 and 4, all electronic control components are mounted on a mold wiring board connected by a wiring press pattern on the same plane, and the mold wiring board is combined into a box shape so that it also serves as an electrical component box. The electrical component box can be abolished and miniaturized, but in general, the mold wiring board requires a mold for cutting the internal wiring pattern and insert injection molding of the wiring pattern, and mold resin for soldering. It is disadvantageous in terms of cost to frequently use a molded wiring board, such as using an expensive material to improve heat resistance. Furthermore, it is difficult to increase the pitch of the wiring press pattern, and the number of signal connections between the substrates increases as the mold substrate becomes smaller. Moreover, in order to form a synthetic resin plate, which is the claim point of this known example, in a box shape and form a housing of an electrical equipment box, an insulating sheet is attached to the component terminal connection part facing the outside and the exposed part of the wiring press pattern. Insulating treatment such as sticking is necessary and is not practical.

  The known technology of FIG. 5 makes use of the characteristics of the mold wiring board, and uses an expensive mold wiring board for wiring connection between large components through which a large current flows, and enables high-density mounting with fine wiring patterns with other small currents. By using inexpensive printed wiring boards for the electronic control parts, the control circuit is divided and used properly. In addition, the mold wiring board is equipped with pins that also serve as a wiring connection with the circuit on the printed wiring board side, and the printed wiring board after mounting and the wiring wiring board can be arranged and connected in a three-dimensional manner. By increasing the number of connections and the number of connections, it is possible to form an electrical component shape that matches the space shape in the air conditioner. However, the printed wiring board and the mold wiring board cannot perform component mounting and soldering connection work at the same time, and the connection work between boards after mounting is also a manual work. Cost reduction becomes difficult due to an increase in man-hours, a wiring press pattern of a molded wiring board, and an increase in the number of injection molds.

  In order to solve the above-mentioned problems, a plurality of circuit wiring patterns obtained by dividing a control circuit in an electrical component and a board dividing groove are arranged on an integrated printed wiring board, and the circuit wiring patterns arranged separately from the electronic control parts are arranged. The wiring board for signal connection is divided after mounting and soldering on the printed wiring board, and the control circuit and electronic control parts of the electrical components are arranged three-dimensionally along the shape of the electrical component box to divide the mounting board. Even if the number is increased, mounting connection and wiring connection can be performed in a lump, and work man-hours can be reduced. The wiring board can also be formed into an electrical component shape that matches the minimum required space shape in the air conditioner with only inexpensive printed wiring, and it is possible to reduce the size and reduce the cost of the electrical component by increasing the electronic component mounting density of the electrical component. .

  By using the present invention, a plurality of circuit wiring patterns obtained by dividing a control circuit in an electrical component and a substrate dividing groove are arranged on an integrated printed wiring board, and signal connection between the electronic control component and the separately arranged circuit wiring pattern is performed. Wiring material for mounting can be divided on the printed wiring board after mounting and soldering, and the control circuit and electronic control parts of the electrical equipment can be arranged three-dimensionally along the shape of the electrical equipment box. Even if increases, mounting connection and wiring connection can be performed in a lump, and man-hours can be reduced. The wiring board can also be formed into an electrical component shape that matches the space shape in the air conditioner with only inexpensive printed wiring, and it is possible to reduce the size and reduce the cost of the electrical component by increasing the electronic component mounting density of the electrical component.

  The actual form of the present invention will be described with reference to FIG. 1 and FIGS. 6 shows an upper surface of the air conditioner outdoor unit 20, and FIG. 7 shows a front view. The outer shape of the electrical component 40 is divided into a heat exchanger 60, a fan 50, and a room for the compressor 30 by the partition plate 70, and the electrical component 40 has a spatial shape that does not interfere with the reactor 90 above the compressor 30.

  FIG. 1 is a development view of an electrical component structure of an air conditioner outdoor unit using the present invention. The electrical component 40 includes an electrical component outer box 48 and an electrical component lid, which are composed of a metal press-molded product 48a in consideration of incombustibility and waterproofness, a radiation fin 48b, and an electric signal connection terminal block 48c to an indoor unit. 49, an appropriate space shape is formed. A resin case 47 is disposed between the printed wiring board 41 and the electrical component outer box 48 in order to electrically insulate the soldered surface of the printed wiring board from the metal electrical component outer box. When the heat sink fins 48b, the electric signal connection terminal block 48c, and the resin case 47 are attached to the partition plate 70, and the printed circuit board 40 is accommodated in the resin case, the electric component cover 49 is covered. It is also possible to omit the metal press-formed product 48a.

  The electronic control components 43 and 44 and the inter-board wiring member 42 of the electrical components are mounted on an integrated printed wiring board 41 provided with a wiring pattern divided into a plurality of parts in advance and soldered. FIG. 8 shows an arrangement example of the printed wiring board and the electronic control component before the board is divided. In addition to 41a to 41d for mounting electronic control components, a printed circuit board may be provided with a mounting auxiliary board 46 used for transport and positioning of automatic mounting equipment and automatic soldering equipment as necessary. Substrate dividing grooves 45a to 45d are arranged according to the number of divisions. The inter-board wiring members 42a to 42c are mounted in the same manner as other electronic control components using a collective wiring member with connector pins, and the manufacturing cost can be reduced by performing connection by automatic soldering. However, a wiring material having a large current capacity may be used individually for a portion where the current capacity is insufficient in the collective wiring material.

  Further, as shown in the electrical component cross-sectional structure of FIG. 9, when the substrate is later divided and stored in accordance with the shape of the electrical component outer box 48 and the resin case 47, the division is arranged in the horizontal direction with respect to the installation direction of the electrical component. The heavy parts 43a to 43d are mounted on the subsequent boards 41a and 41c, and the small and light parts 44a to 44c are mounted separately on the vertically arranged 41b and 41d, thereby reducing the stress applied to the soldering portion. it can. The divided wiring pattern and component arrangement on the printed wiring board are considered in advance when designing the printed wiring board. The printed wiring board is an inexpensive single-sided wiring board, and the structure in which electronic control components are mounted only on one side is the most desirable in terms of material cost and manufacturing cost. However, a double-sided mounting board using a multilayer wiring board is used depending on the control circuit scale. May be used.

The structure expansion | deployment figure of the electrical component of the air conditioner outdoor unit by this invention. The structure expansion diagram of the electrical component of the air conditioner outdoor unit by a prior art. The structure expansion view of the electrical equipment using a mold wiring board. Sectional drawing of the electrical equipment using a mold wiring board. The figure which shows the electrical equipment using a mold wiring board and a printed wiring board. The top view of an air conditioner outdoor unit structure. The front view of an air conditioner outdoor unit structure. FIG. 2 is a structural diagram of a mounting substrate before division according to the present invention. The electrical equipment cross-section figure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 40 ... Electrical component, 41 ... Printed wiring board, 42 ... Inter-substrate wiring material, 43 ... Electronic control component (large size / heavy component), 44 ... Electronic control component (small size / light weight component), 45 ... Substrate dividing groove, 46 ... Auxiliary mounting board, 47... Resin case, 48.

Claims (7)

  A printed circuit board with a plurality of circuit wiring patterns and board dividing grooves that divide the control circuit in the electrical component are arranged on an integrated printed wiring board, and the signal connection wiring material between the electronic control components and the separately arranged circuit wiring patterns is printed An electrical component for an air conditioner, characterized in that the control circuit and electronic control component of the electrical component are three-dimensionally arranged along the shape of the electrical component box after mounting and soldering on the wiring board.   2. The air conditioner according to claim 1, wherein a circuit wiring pattern and electronic control parts are arranged on both sides or one side of the printed circuit board before division in accordance with the control circuit scale of the electrical component. Electrical components.   3. The electrical component according to claim 1, wherein a large or heavy component is placed on the printed wiring board that is three-dimensionally arranged in the horizontal direction with respect to the installation state of the electrical component, and the board that is arranged vertically is small and light. An electronic component for an air conditioner that is equipped with electronically controlled components and has a component arrangement that minimizes stress on the soldered connection.   The electrical component according to any one of claims 1 to 3, wherein the divided printed wiring board is three-dimensionally arranged along a continuous surface of the electrical component box after the division, and the wiring material for signal connection between circuit patterns is divided. Air conditioner electrical components characterized by the shortest length.   The printed wiring board according to claim 2, wherein electronic control components are arranged on both sides of the printed wiring board, and only a small surface-mounted component is arranged on the side facing the electric component box, The air conditioner electrical component is characterized in that only the insulating resin case is sandwiched between the printed wiring boards.   4. The electrical component according to claim 3, wherein parts that generate heat and require large heat radiation fins when the electrical component control circuit operates are assembled, and the electrical component installation state and a position in contact with the heat radiation fins of the electrical component box on the horizontal board Air conditioner electrical components characterized by being arranged in The electrical component according to claim 1, wherein the electrical component is used in an outdoor unit of an air conditioner that uses a large heavy component and a high heat generating component as an electronic control component.

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