WO2003007376A1 - Power module and air conditioner - Google Patents
Power module and air conditioner Download PDFInfo
- Publication number
- WO2003007376A1 WO2003007376A1 PCT/JP2002/006659 JP0206659W WO03007376A1 WO 2003007376 A1 WO2003007376 A1 WO 2003007376A1 JP 0206659 W JP0206659 W JP 0206659W WO 03007376 A1 WO03007376 A1 WO 03007376A1
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- WIPO (PCT)
- Prior art keywords
- power module
- heat
- mounting
- aluminum substrate
- bare chip
- Prior art date
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/141—One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
- H01L23/433—Auxiliary members in containers characterised by their shape, e.g. pistons
- H01L23/4334—Auxiliary members in encapsulations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/14—Fastening; Joining by using form fitting connection, e.g. with tongue and groove
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/301—Electrical effects
- H01L2924/3011—Impedance
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
- H05K1/0203—Cooling of mounted components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0306—Inorganic insulating substrates, e.g. ceramic, glass
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09054—Raised area or protrusion of metal substrate
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
- H05K2201/09745—Recess in conductor, e.g. in pad or in metallic substrate
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
- H05K2201/1034—Edge terminals, i.e. separate pieces of metal attached to the edge of the PCB
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
- H05K2201/2018—Presence of a frame in a printed circuit or printed circuit assembly
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0058—Laminating printed circuit boards onto other substrates, e.g. metallic substrates
- H05K3/0061—Laminating printed circuit boards onto other substrates, e.g. metallic substrates onto a metallic substrate, e.g. a heat sink
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
- H05K3/284—Applying non-metallic protective coatings for encapsulating mounted components
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3421—Leaded components
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/36—Assembling printed circuits with other printed circuits
- H05K3/366—Assembling printed circuits with other printed circuits substantially perpendicularly to each other
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/36—Assembling printed circuits with other printed circuits
- H05K3/368—Assembling printed circuits with other printed circuits parallel to each other
Definitions
- the present invention relates to an air conditioner having a power module and a power module, and more particularly, to a heat radiation structure for improving the heat radiation efficiency of a power module on which circuit components generating a large amount of heat are mounted, and a commercial AC power supply for an inverter circuit.
- the present invention relates to modularization of an inverter circuit when converting into an alternating current of an arbitrary frequency by using the method. Background technology ''
- an inverter circuit In order to control each part of the equipment at an arbitrary frequency, an inverter circuit is used, which once rectifies the commercial AC power to DC and then converts it to AC controlled to an arbitrary frequency.
- the inverter circuit is composed of a combination of a rectifying stack, a smoothing capacitor, a power transistor, and other components. These circuit components are increasingly integrated, and an intelligent module that packages the drive circuit and the power element has been commercialized. .
- the power supply 1 that is essential for driving the inverter is composed of a converter that rectifies the commercial AC power supply to the direct current.Harmonics are suppressed and the efficiency is improved. The scheme used has been proposed.
- the converter unit that converts commercial AC power into DC and the inverter that converts DC into AC at a predetermined frequency are composed of heat-generating components such as a diode-power switch, it is necessary to configure a heat dissipation structure. For example, by using an aluminum substrate for mounting circuit components, it is possible to obtain a cooling effect for heat-generating components due to the heat radiation effect on the back side of the mounting surface of the aluminum substrate.
- An object of the present invention is to propose an efficient heat dissipation structure for a power module, to reduce the size of the device, and to reduce the cost.
- the converter section and the inverter section are often composed of parracks or dedicated modules, respectively, which increases the size of the finished product, and requires a spatial layout design and thermal design that takes heat generation conditions into consideration. And the design becomes very difficult.
- a control unit for controlling the inverter circuit is configured by a microcomputer or the like, and the control unit and the inverter circuit are connected by a harness or the like. When a drive signal is transmitted due to such harnesses, noise is likely to occur, which may lead to malfunction.
- control of the impeller is very sophisticated, and it is very difficult to diagnose a faulty part, it is difficult to identify the part to be replaced, and the replacement operation is complicated.
- operation control is performed by controlling the amount of circulating refrigerant in a refrigerant circuit by a compressor.
- the operating frequency of such a compressor is controlled by an inverter circuit, and thus has the problems of the above-described inverter circuit.
- an imparter circuit is installed in the outdoor unit, there is a concern that deterioration due to environmental changes such as long-term temperature fluctuations and wind and rain, and insects and other small animals may enter, but such effects should be minimized. There is a need.
- Another object of the present invention is to remove exposed parts such as harnesses, solder parts, and component leads.
- the power module according to claim 1 of the present invention has a bare chip component constituting a power supply circuit for performing power control, a mounting board on which the bare chip component is mounted, and an insulating property for molding a surface of the mounting board on which the bare chip component is mounted. And a mold member made of resin.
- connection between the bare chip component and the wiring on the mounting board can be configured by a wire bonding or the like, and since the wiring portion is molded by a molding material, the wiring portion can be shortened. In addition, the effects of noise can be eliminated, and since there are no exposed parts, it is possible to prevent the effects of corrosion, dust, and the invasion of small animals.
- a power module according to a second aspect of the present invention is the power module according to the first aspect, wherein a plurality of bare chip components are respectively mounted on a mounting board.
- the connection between the bare chip component and the wiring on the mounting board can be made by wire bonding, etc., and the wiring part can be made shorter. It can be configured to dissipate heat through the device.
- a power module according to claim 3 of the present invention is the power module according to claim 1 or 2, wherein the bare chip component includes an IC chip mounted on a printed board mounted on a mounting board .
- a power module according to claim 4 of the present invention is the power module according to claims 1 to 3, wherein the mounting board is provided with a radiating fin integrally provided on the back surface side of the surface on which the bare chip component is mounted.
- a power module according to claim 5 of the present invention is the power module according to any one of claims 1 to 4, further comprising a side wall that is provided upright from a side edge of the mounting board to a side on which the bare chip component is mounted.
- the mold member is filled in a space formed by the mounting substrate and the side wall.
- the power module according to claim 6 of the present invention is the power module according to claim 5, wherein the side wall is made of a synthetic resin plate member having a conductor pattern embedded therein. .
- circuit elements using conductor patterns embedded inside the side walls, and it is possible to mount circuit elements that are difficult to integrate such as electrolytic capacitors through the side walls. .
- a power module according to claim 7 of the present invention is the power module according to any one of claims 1 to 6, wherein the bare chip component includes: an inverter circuit that converts a commercial AC power supply into an AC of an arbitrary frequency; And a control unit for controlling the output frequency of the circuit.
- the power module according to claim 8 of the present invention is the power module according to claim 7, wherein the inverter circuit converts a commercial AC power supply into DC, and converts an output of the converter into AC.
- each part may be configured with one or a plurality of bare chip components, and the components may be mounted on a mounting board. Therefore, specializing in spatial layout design and thermal design There is no need to consider it as a new design.
- a power module according to claim 9 of the present invention is the power module according to claim 7 or 8, wherein the inverter circuit includes a compressor that controls a circulation amount of the refrigerant in the refrigerant circuit. Control the power supply of the machine.
- the size of the device can be reduced by modularizing the inverter circuit that controls the compressor of the air conditioner, eliminating the effects of noise, corrosion, dust, and the invasion of small animals.
- a highly reliable device by designing this single module as a single component, there is no need to design a dedicated structure for each type of compressor to be mounted. Man-hours can be significantly reduced.
- the power module according to claim 10 of the present invention is the power module according to claim 9, wherein the air conditioner exchanges heat with a refrigerant inside a heat exchanger disposed in a refrigerant circuit.
- a bare chip component includes a fan that generates an air flow to be performed and a fan motor that drives the fan to rotate.
- the bare chip component includes a fan motor control unit that controls the rotation of the fan motor.
- the fan motor control unit composed of bare chip components is mounted on a mounting board together with other circuit components and modularized, so that the device can be miniaturized. There is no need to consider it again.
- An air conditioner according to claim 11 of the present invention is an air conditioning unit that performs heat exchange between introduced air and a refrigerant circulating in a refrigerant circuit to supply air after the heat exchange to a room,
- An air conditioner including a power supply unit for controlling power supplied to an air conditioning unit, wherein a power supply unit mounts a base component constituting a power supply circuit for performing power supply control and a bare chip component.
- the power module is characterized by being a modularized power module composed of an aluminum substrate and a molding member made of an insulating resin for molding the surface of the mounting substrate on which the bare chip component is to be mounted.
- An air conditioner according to claim 12 of the present invention is the air conditioner according to claim 11.
- the air-conditioning unit has a compressor that controls the amount of refrigerant circulating in the refrigerant circuit, and the bare-chip components control the power supply to the compressor. And a control unit for controlling the output frequency of the inverter circuit.
- the effects of noise can be eliminated by modularizing the power supply unit for controlling the power supply to the compressor of the air conditioner.
- the outdoor unit since the outdoor unit is installed outdoors, insects and dust may enter the outdoor unit. Therefore, it is possible to prevent foreign matter from reaching the power supply unit and causing a failure such as a short circuit accident.
- An air conditioner according to claim 13 of the present invention is the air conditioner according to claim 11 or 12, wherein the air conditioner is provided inside a heat exchanger disposed in a refrigerant circuit. It has a fan that generates an air flow for exchanging heat with the refrigerant, and a fan motor that drives the fan to rotate.
- the bare chip component includes a fan motor controller that controls the rotation of the fan motor.
- the module can be downsized by including a fan motor control unit that controls the rotation of the fan motor of the air conditioner, so that the size of the device can be reduced, and the effects of noise, corrosion, dust, and the invasion of small animals can be achieved. And provide a highly reliable device.
- the power module according to claim 14 of the present invention is a member having a high thermal conductivity, which includes a mounting surface on which a power supply circuit for performing power supply control is mounted, and a heat radiation surface on which a concave and convex portion for heat radiation is formed. It has a mounting board formed.
- the heat generated from the circuit components mounted on the mounting surface can be efficiently radiated by the concave and convex portions formed on the heat radiation surface of the mounting substrate.
- a power module according to claim 15 of the present invention is the power module according to claim 14, wherein the mounting surface and the heat radiating surface form the front and back of the mounting board.
- the power module according to claim 16 of the present invention is the power module according to claim 14 or 15.
- the mounting substrate is formed of an aluminum substrate having a copper-based wiring pattern formed on one surface of an aluminum-based metal plate-shaped member.
- the aluminum-based metal having high thermal conductivity is used as the mounting substrate, it is possible to efficiently radiate the heat from the circuit components mounted on the mounting surface.
- the power module according to claim 17 of the present invention is the power module according to any one of claims 14 to 16, wherein a bonding surface that is in close contact with the uneven portion of the heat radiation surface, and a plate-shaped fin member.
- a radiating fin including a fin forming portion on which the fin is provided is attached to the radiating surface of the mounting board.
- the joint surface of the radiating fins has an uneven shape so as to be in close contact with the radiating surface of the mounting board, and the contact area between the radiating fins and the mounting board increases, improving the heat transfer efficiency. Become. Therefore, the heat generated from the circuit components mounted on the mounting board is efficiently transmitted to the radiation fins, and the radiation efficiency can be increased.
- the power module according to claim 18 of the present invention is the power module according to any one of claims 14 to 17, wherein the projections and depressions have a rectangular cross section formed in parallel with each other. And a groove formed between adjacent ridges.
- the ridges having a rectangular cross section and the grooves formed between the adjacent ridges increase the surface area of the heat radiation surface of the mounting board, and the heat radiation effect can be improved.
- the contact area between the heat radiation surface of the mounting board and the joint surface of the heat radiation fins increases, and the heat transfer efficiency of each other improves, so that the heat radiation effect can be enhanced.
- the power module according to claim 19 of the present invention is the power module according to any one of claims 14 to 17, wherein the projections and depressions have a triangular cross-section formed in parallel with each other. And a groove formed between the ridges in contact with each other.
- the surface area of the heat radiating surface of the mounting board is increased by the ridges having a triangular cross section and the grooves formed between the ridges that come into contact with each other, so that the heat radiation effect can be improved.
- the contact area between the heat radiation surface of the mounting board and the joint surface of the heat radiation fins increases, and the heat transfer efficiency of each other improves, so that the heat radiation effect can be enhanced.
- the power module according to claim 20 of the present invention is the power module according to any one of claims 14 to 17, wherein the concave and convex portions have a trapezoidal cross-sectional ridge portion formed in parallel with each other. And a groove formed between the ridges that come into contact with each other.
- the surface area of the heat radiating surface of the mounting board is increased by the ridges having a trapezoidal cross section and the grooves formed between the adjacent ridges, and the heat radiation effect can be improved.
- the contact area between the heat radiation surface of the mounting board and the joint surface of the heat radiation fins increases, and the heat transfer efficiency between them increases, so that the heat radiation effect can be enhanced.
- the power module according to claim 21 of the present invention is the power module according to any one of claims 14 to 17, wherein the projections and depressions are formed in a semicircular cross-sectional shape formed in parallel with each other. And a groove formed between adjacent ridges.
- the ridges having a semicircular cross section and the grooves formed between the adjacent ridges increase the surface area of the heat radiation surface of the mounting board, and the heat radiation effect can be improved.
- the contact area between the heat radiation surface of the mounting board and the joint surface of the heat radiation fins increases, and the heat transfer efficiency of each other improves, so that the heat radiation effect can be enhanced.
- the power module according to claim 22 of the present invention is the power module according to any one of claims 14 to 17, wherein the concave and convex portions are formed by a plurality of protrusions each having a hemispherical tip. ing.
- the plurality of protrusions each having a hemispherical tip increases the surface area of the heat radiation surface of the mounting board, and the heat radiation effect can be improved. Also, when attaching the heat radiating fins, the contact area between the heat radiating surface of the mounting board and the joint surface of the heat radiating fins increases, and the heat transfer efficiency between them increases, so that the heat radiating effect can be enhanced.
- a power module according to claim 23 of the present invention is the power module according to claim 17, wherein the heat dissipating surface of the mounting board and the joining surface of the heat dissipating fins are closer to the base end than to the base end. It has a ridge having a cross-sectional shape bulging toward the other, and a groove for receiving the ridge on the other side.
- a ridge portion having a cross-sectional shape in which the distal end portion bulges laterally with respect to the base end portion increases the contact area between the heat radiation surface of the mounting board and the joint surface of the heat radiation fins, thereby improving the heat transfer efficiency of each other, thereby increasing the heat radiation effect.
- FIG. 1 is a block diagram illustrating an example of a power supply circuit of the air conditioner.
- FIG. 2 is a side view showing an example of the substrate structure of the power module.
- FIG. 3 is a side view showing another example of the substrate structure of the power module.
- FIG. 4 is a perspective view showing an example of the substrate structure of the power module.
- FIG. 5 is a perspective view showing another example of the substrate structure of the power module.
- FIG. 6 is a perspective view showing an example of the heat dissipation surface of the aluminum substrate.
- FIG. 7 is a perspective view showing an example of a heat dissipation surface of an aluminum substrate.
- FIG. 8 is a perspective view showing an example of a heat dissipation surface of an aluminum substrate.
- FIG. 9 is a perspective view showing an example of a heat dissipation surface of an aluminum substrate.
- FIG. 10 is a perspective view showing an example of a heat dissipation surface of an aluminum substrate.
- FIG. 11 is a perspective view showing an example of a joint surface of the radiation fin.
- FIG. 12 is a perspective view showing an example of a joint surface of the radiation fin. ⁇
- FIG. 13 is a perspective view showing an example of a joint surface of the heat radiation fin.
- FIG. 14 is a perspective view showing an example of a joint surface of the radiation fin.
- FIG. 15 is a perspective view showing an example of a joint surface of the radiation fin.
- FIG. 16 is a perspective view showing an example of a joint structure between the aluminum substrate and the radiation fins.
- FIG. 17 is a perspective view showing an example of a joint structure between the aluminum substrate and the radiation fins.
- FIG. 18 is a perspective view showing an example of a joint structure between the aluminum substrate and the radiation fins.
- FIG. 19 is an explanatory view showing an example in which heat radiation fins are erected on the rear surface side of the mounting surface of the aluminum substrate.
- FIG. 1 is a block diagram illustrating an example of a power supply circuit used in an air conditioner. As shown in FIG. 1, an AC power supply is connected to a commercial AC power supply 1 and supplied to a control power supply unit 2 and a modularized power supply circuit 3.
- the control power supply 2 is composed of a switching power supply and supplies power to the RA control unit 4 including a microprocessor, a ROM, and various interfaces.
- the RA control unit 4 is composed of an outside air thermistor that detects the outside air temperature, a heat exchange thermistor that detects the evaporation temperature and condensation temperature of the heat exchanger, a discharge pipe temperature sensor that detects the discharge pipe temperature of the compressor, and the suction pressure of the compressor. Detection signals of a plurality of sensors 5 such as a suction pressure sensor for detecting the pressure are input.
- the RA control unit 4 includes a plurality of actuators 6 including a motor-operated expansion valve disposed in the refrigerant circuit for decompressing the internal refrigerant and a four-way switching valve for switching the rotation mode of the refrigerant circuit. They are connected and perform these controls.
- the power supply circuit 3 mainly controls the power supply for driving the compressor 7 and the fan motor 8 according to the operating condition of the air conditioner, and rectifies the AC supplied from the AC power supply 1 to rectify the DC.
- the converter section 31 converts the output to AC
- the inverter section 32 converts the output of the converter section 31 to AC
- the converter driving section 33 drives the converter section 31, and the inverter section 32 drives.
- Drive unit 34 a fan motor control unit 37 that generates a power supply for driving the fan motor 8, a converter drive unit 3, an inverter drive unit 34, and a fan motor control unit 37. It includes a control unit 35 for controlling and a communication circuit 36 for transmitting and receiving data to and from the RA control unit 4.
- Converter section 31 can be configured to use a power switch, and can also be configured to include an active filter circuit that outputs a constant voltage DC to inverter section 32.
- the fan motor 8 one having a built-in inverter circuit and an inverter drive unit can be used.
- the output of the converter unit 31 is supplied and the rotation speed command signal input from the fan motor control unit 37 is used as the fan speed control signal.
- the rotation control may be performed on the basis of the rotation control.
- the fan motor control unit 37 is configured to output the rotation speed command signal of the fan motor 8, and when the fan motor 8 that does not have a built-in inverter circuit is used, compression is performed.
- a configuration including an inverter unit, an inverter driving unit, and the like can be adopted.
- the RA control unit 4 determines the control amount of each unit according to the detection value input from the sensor 5 and the current operation mode, outputs the control value to the actuator 6, and controls the compressor 7 and the fan motor 8 The amount is transmitted to the control unit 35 in the power supply circuit 3 via the communication circuit 36.
- the control section 35 sends the converter drive section 33, the impeller drive section 34, and the fan motor control section 37 based on the control amounts of the compressor 7 and the fan motor 8 transmitted from the RA control section 4.
- the control value is output. As a result, the operating frequency of the compressor 7 and the rotation speed of the fan motor 8 can be controlled according to the operating conditions.
- the power supply circuit 3 has improved controllability and high-performance control by integrating and modularizing circuit components, and packaging heat and noise source components. That is, as shown in FIG. 2, the power source circuit 3 is composed of a plurality of bare chip components 311, 312, 313, such as a diode, a power transistor, a smoothing capacitor, and an integrated IC chip. Each is mounted on an aluminum substrate 301 by wire bonding, soldering, or the like.
- the aluminum substrate 301 for example, a substrate obtained by bonding a thin copper plate constituting a circuit pattern to the surface of an aluminum nitride plate having high thermal conductivity and good electrical insulation can be used. Harness connects connections between circuits such as control section 35, converter section 31, inverter section 32, converter drive section 33, inverter drive section 34, fan motor control section 37, communication circuit 36, etc. In this case, the harness becomes a bundle of connections and generates radiation noise in the same way as a coil.
- the use of an aluminum substrate 301 in which a copper thin plate that constitutes a circuit pattern is bonded to the surface of an aluminum nitride plate makes it possible to suppress the generation of radiated noise, and to reduce noise controllability. Can be improved.
- bare chip components such as 311 and 312. It is configured to be directly mounted on the aluminum substrate 301.
- a control unit 35 composed of a one-chip microcomputer including a microprocessor, ROM, and various interfaces, etc. It can be mounted on a normal printed circuit board 3 21 by soldering the lead 3 2 2 provided on the printed circuit board 3 2 1 to the aluminum substrate 3 0 1.
- the printed circuit board 3 21 can be arranged so as to be perpendicular to the mounting surface of the aluminum substrate 301, and as shown in FIG. It is also possible to arrange so that 3 2 1 is parallel to the mounting surface of the aluminum substrate 3 0 1.
- precision components such as microcomputers are mounted on the printed circuit board 321 to form a hybrid structure, which eliminates unnecessary temperature loads from other circuit components that generate a large amount of heat, and It is possible to reduce the influence of noise due to switches and the like.
- the inside of the power supply circuit 3 has a non-insulated structure, and the control unit 35 is configured to transmit and receive data to and from the outside via the communication circuit 36. Therefore, the communication circuit 36 ensures insulation from the outside, and the insulation distance inside the module is shortened, so that the mounting density of each circuit component can be increased and the module can be downsized. It becomes possible.
- each bare chip component or narrow board is mounted on the aluminum substrate 301 on which the bare chip component 311, 312 and the bare chip component 313 are mounted on the mounting surface.
- the bare chip component 3 1 directly mounted on the aluminum substrate 301 is mounted. It is possible to provide a molding material so as to cover 1, 3 12 and the lead 3 2 2 of the printed circuit board 3 21. Further, the bare chip components 311 and 312 may be covered with a uniform thickness of the molding material, and a molding material covering only the periphery of the printed circuit board 321 may be further provided. In this case, the molding material that covers only the periphery of the printed circuit board 3 2 1 is the molding material that covers the bare chip components 3 1 1 and 3 1 2 It is preferable to use a material having higher viscosity than that of the raw material.
- a molding material is provided so as to cover all circuit components. It is possible. It is also possible to provide a molding material so as to cover only the bare chip components 311 and 312 and the lead portions 3222 provided on the printed board 3221. Further, the bare chip components 311 and 312 may be covered with a molding material having a uniform thickness, and a molding material covering only the periphery of the printed circuit board 3221 may be further provided. Also in this case, it is preferable that the molding material covering only the periphery of the printed circuit board 3 21 is made of a material having higher viscosity than the molding material covering the bare chip components 3 11 and 3 12.
- the molding material is made of an insulating synthetic resin.
- a silicon-based resin and a epoxy-based resin can be used.
- the molding material can be applied so as to cover each circuit component mounted on the aluminum substrate 301, but in order to achieve more reliable insulation, the upper surface of the aluminum substrate 301 is required.
- each of the side walls 35 1 to 35 54 can be made of aluminum nitride, similarly to the aluminum substrate 301, and can be made of an insulating synthetic resin material.
- the side walls 35 1 to 354 are fixed to the side edges of the aluminum substrate 301 by heat welding or bonding, respectively, and the adjacent portions of the side walls 35 1 to 354 are heat welded. It is configured so that there is no gap because it is fixed by adhesive or adhesive. It is to be noted that the side walls 351 to 354 can be formed by integral molding.
- the space on the mounting surface side of the aluminum substrate 301 composed of the aluminum substrate 301 and the side walls 351-135 is filled with the molding material 341 as described above.
- the mold material 341 is provided so as to cover bare chip components 311, 312, and the wiring portions thereof mounted on the aluminum substrate 301.
- the side walls 35 1 to 35 54 are integrally molded or combined one by one to form a frame structure that surrounds the aluminum substrate 301, and adhere tightly to the aluminum substrate so that there is no gap between them. It can be a case. Therefore, it is easy to cover the entire surface of the bare chip components 311, 312 ⁇ 'and the wiring portion thereof, and the reliability can be improved. Further, the case structure is realized by the side walls 35 1 to 35 54 and the aluminum substrate 301, and a sufficient mold thickness necessary to cover each circuit component can be freely adjusted. That is, the thickness of the filling material can be freely adjusted by suppressing the outflow of the molding material to be filled by the side walls 351 to 354 surrounding the periphery of the aluminum substrate 301.
- side walls 36 1 to 36 4 made of a synthetic resin in which a conductor pattern made of black is embedded can be used. Noh.
- the side walls 36 1 to 36 4 are formed by inserting a conductor pattern made of a copper plate into a mold and integrally molding with an insulating synthetic resin.
- the side walls 36 1 to 36 4 are molded separately. It is also possible to make everything in one piece.
- the side walls 361 to 364 thus formed are fixed to the aluminum substrate 301 by heat welding, bonding or screwing. At this time, it is preferable that the adjacent portions of the side walls 36 1 to 364 between the aluminum substrate 301 and the side walls 361 to 364 have no gap.
- the molding material 341 is filled in the space on the mounting surface side of the aluminum substrate 301 composed of the aluminum substrate 301 and the side walls 361 to 364.
- the mold material 341 is provided so as to cover the bare chip components 311, 312, and the wiring portions mounted on the aluminum substrate 301.
- the conductor pattern embedded in the side walls 36 1 to 36 4 constitutes a wiring pattern for mounting large external circuit components 37 1 to 37 3 such as electrolytic capacitors. Therefore, such external circuit components 37 1 to 37 3 are mounted at appropriate places on the side walls 36 1 to 36 4 by soldering or the like.
- FIG. 5 shows an example in which external circuit components 3 7 1 to 3 7 3 are attached to the outer surface side of the side wall 3 6 1. If there is a space on the upper surface of 1, the external circuit components can be configured to be mounted on the inner surface side of the side walls 361 to 364.
- the integration ratio can be increased.
- the mounting and holding portion of a large circuit component such as a large electrolytic capacitor can also be used, so that the integration ratio can be increased and the size of the device can be reduced.
- a ceramic substrate or the like can be used.
- a heat dissipation recess is formed on the back side to form the heat dissipation surface be able to.
- 6 to 10 show examples of the configuration of the heat radiating surface on which the heat radiating uneven portions are formed.
- the aluminum substrate 401 shown in FIG. 6 is for mounting the power module 300 molded with the synthetic resin as described above, and the lower surface thereof has ridges having a rectangular cross section formed in parallel with each other.
- a concave / convex portion 404 is formed, which is composed of 402 and a groove 403 formed between the protruding ridges 402 that are in contact with each other.
- the concavo-convex portion 404 thus configured has a large surface area due to the ridge portion 402 having a rectangular cross section and the groove portion 403 formed between the adjacent ridge portions 402. As a result, the heat radiation efficiency is greatly improved.
- the aluminum substrate 411 shown in FIG. 7 is for mounting the power module 300 molded by the synthetic resin as described above, and the lower surface thereof has a ridge having a triangular cross section formed in parallel with each other.
- An uneven portion 4 14 composed of 4 12 and a groove 4 13 formed between the adjacent ridges 4 12 is formed.
- the concavo-convex portion 4 14 configured in this way has a large surface area due to the ridge 4 12 having a triangular cross section and the groove 4 13 formed between the adjacent ridges 4 12. As a result, the heat radiation efficiency is greatly improved.
- the aluminum substrate 4 21 shown in FIG. 8 is molded with a synthetic resin as described above.
- a power module 300 is mounted on the lower surface.
- a ridge 42 2 having a trapezoidal cross section formed in parallel with each other and a groove 4 formed between adjacent ridges 4 22 are formed.
- An uneven portion 4 2 4 composed of 2 and 3 is formed.
- the concavo-convex portion 4 2 4 thus configured has a large surface area due to the ridge 4 2 2 having a trapezoidal cross section and the groove 4 2 3 formed between the adjacent ridges 4 2 2. As a result, the heat radiation efficiency is greatly improved.
- the aluminum substrate 431 shown in FIG. 9 is for mounting the power module 300 molded with the synthetic resin as described above, and has, on its lower surface, a ridge having a semicircular cross section formed in parallel with each other.
- An uneven portion 4334 composed of a portion 432 and a groove 433 formed between adjacent ridges 432 is formed.
- the concavo-convex portion 4 3 4 configured as described above has a large surface area due to the ridge 4 3 2 having a semicircular cross section and the groove 4 3 3 formed between the adjacent ridges 4 3 2. As a result, the heat radiation efficiency is greatly improved.
- the aluminum substrate 441 shown in FIG. 10 mounts the power module 300 molded with the synthetic resin as described above, and has a plurality of protrusions having a hemispherical tip on the lower surface. An uneven portion 4444 composed of 4442 is formed.
- the uneven portion 4444 thus configured has a large surface area due to the protrusion 4442, and the heat radiation efficiency is greatly improved.
- FIGS. 11 to 15 show examples of the configuration of such a radiation fin.
- the heat radiation fins 501 shown in FIG. 11 are attached to the aluminum substrate 401 shown in FIG. 6, and one surface is a bonding surface to be bonded to the uneven portion 404 of the aluminum substrate 401. 504.
- the joining surface 504 has a ridge portion 502 having a rectangular cross section that fits into the groove portion 403 of the aluminum substrate 401, and a groove portion that receives the ridge portion 402 of the aluminum substrate 401. 503, and can be bonded to the recessed portion 404 of the aluminum substrate 401 in close contact.
- the heat radiation fin 501 has a plurality of plate-like fin members 505 protrudingly provided on the side opposite to the joint surface 504.
- the fin members 505 are formed in a thin plate shape to increase the surface area, and are arranged at predetermined intervals to further enhance the heat radiation effect.
- the radiating fins 501 are made of a material having high thermal conductivity such as aluminum nitride and a good insulating property, similar to the base material of the aluminum substrate 401, and are formed by drawing or punching. It can be created by a processing method.
- the radiating fins 501 are joined so that the joining surface 504 is in close contact with the uneven portion 404 of the aluminum substrate 401, and fixed by a method such as screwing, heat welding, or bonding with a resin material.
- the heat radiation fin 5 The heat transfer efficiency to the power module 301 is improved, and the heat generated in the power module 300 can be radiated more efficiently than the fin member 505 of the heat radiation fin 501.
- the heat radiation fins 5 1 1 shown in FIG. 12 are attached to the aluminum substrate 4 11 1 shown in FIG. 7, and one surface is a bonding surface to be bonded to the uneven portion 4 14 of the aluminum substrate 4 11. 5 1 4 is constituted.
- the joining surface 5 1 4 has a triangular cross-sectional ridge 5 1 2 that fits into the groove 4 1 3 of the aluminum substrate 4 1 1 and a groove that receives the ridge 4 1 2 of the aluminum substrate 4 1 1. 5 13, and can be bonded to the uneven portion 4 14 of the aluminum substrate 4 1 1 in close contact.
- the radiation fins 511 are formed with a plurality of plate-like fin members 515 protruding on the opposite side to the joining surface 514.
- the fin members 5 15 are formed in a thin plate shape to increase the surface area, and are arranged at predetermined intervals to further enhance the heat radiation effect.
- the heat radiation fins 511 are made of a material having high thermal conductivity such as aluminum nitride and a good insulating property, similarly to the heat radiation fins 501 described above. It is joined so as to be in close contact with the uneven part 4 1 4 of 11 and fixed by a method such as screwing, heat welding, or bonding with a resin material.
- the uneven portion 4 14 of the aluminum substrate 4 11 Since the bonding area of the bonding surface of 511 with the 5 1 4 is large, the heat transfer efficiency from the aluminum substrate 4 1 1 to the radiating fin 5 1 1 is improved, and the heat generated by the power module 3 0 The heat can be dissipated more efficiently than the fin member 5 5 1 5.
- the heat dissipating fins 52 1 shown in FIG. 13 are attached to the aluminum substrate 42 1 shown in FIG. 8, and one surface is a bonding surface that is bonded to the uneven portion 4 24 of the aluminum substrate 42 1. 5 2 4 is constituted.
- the joining surface 5 2 4 has a trapezoidal ridge 5 2 2 that fits into the groove 4 2 3 of the aluminum substrate 4 2 1 and a groove that receives the ridge 4 2 2 of the aluminum substrate 4 2 1. 5 2 3 and can be bonded to the uneven portion 4 2 4 of the aluminum substrate 4 2 1 in close contact.
- the heat dissipating fins 5 2 1 are plate-shaped fin members 5 protruding on the side opposite to the joining surface 5 2 4.
- the fin members 525 are formed in a thin plate shape to increase the surface area, and are arranged at regular intervals to further enhance the heat radiation effect.
- the heat radiation fins 52 1 are made of a material having high thermal conductivity such as aluminum nitride and a good insulating property, similarly to the heat radiation fins 501 described above. 21 It is joined so as to be in close contact with the uneven portion 4 2 4, and is fixed by a method such as screwing, heat welding, or bonding with a resin material.
- the heat radiation fin 5 since the joint area between the uneven portion 4 2 4 of the aluminum substrate 4 2 1 and the joint surface 5 2 4 of the heat radiation fin 5 2 1 is large, the heat radiation fin 5 The heat transfer efficiency to the power module 300 is improved, and the heat generated in the power module 300 can be radiated more efficiently than the fin members 525 of the radiating fins 521.
- the heat radiation fins 531 shown in FIG. 14 are to be attached to the aluminum substrate 431 shown in FIG. 9, and one surface is a bonding surface to be bonded to the uneven portion 4334 of the aluminum substrate 431. 5 3 4 is composed.
- the joining surface 5 3 4 receives a ridge 5 3 2 having a semicircular cross section that fits into the groove 4 3 3 of the aluminum substrate 4 3 1 and a ridge 4 3 2 of the aluminum substrate 4 3 1. It is made up of grooves 5 33, and can be bonded to the uneven portions 4 3 4 of the aluminum substrate 4 31 in close contact.
- the radiation fins 5 3 1 are plate-like fin members 5 protruding from the
- the fin member 5 3 5 is thin to increase the surface area. It is formed in a plate shape, and is arranged at a predetermined interval to further enhance the heat radiation effect.
- the heat radiating fins 531 are made of a material having a high thermal conductivity such as aluminum nitride and a good insulating property, similarly to the heat radiating fins 501 described above. 31 It is joined so as to be in close contact with the concave and convex portion 4 3 4 and fixed by a method such as screwing, heat welding, or bonding with a resin material.
- the heat radiation fin 5 since the joint area between the uneven portion 4 3 4 of the aluminum substrate 4 3 1 and the joint surface 5 3 4 of the heat radiation fin 5 3 1 is large, the heat radiation fin 5 The heat transfer efficiency to the heat sink 31 is improved, and the heat generated in the power module 300 can be radiated more efficiently than the fin members 535 of the heat radiation fins 531.
- the heat dissipating fins 54 1 shown in FIG. 15 are attached to the aluminum substrate 44 1 shown in FIG. 10, and one surface is joined to the uneven surface 4 44 4 of the aluminum substrate 4 41.
- the surface 5 4 4 is constituted.
- the joint surface 5 4 4 has a plurality of recesses 5 4 3 into which the protrusions 4 4 2 of the aluminum substrate 4 4 1 are fitted, and is joined to the uneven portion 4 4 4 of the aluminum substrate 4 4 1 in a close contact state. It is possible to do.
- the heat radiation fins 54 1 are formed with a plurality of plate-shaped fin members 5 45 protruding from the side opposite to the joining surface 5 44.
- the fin members 545 are formed in a thin plate shape to increase the surface area, and are arranged at predetermined intervals to further enhance the heat radiation effect.
- the heat radiation fins 54 are made of a material having a high thermal conductivity such as aluminum nitride and a good insulating property. 3 It is joined so as to be in close contact with the uneven portion 4 4 4 and is fixed by screws, heat welding, bonding with a resin material, or the like.
- the ridges provided on the heat-dissipating surface of the aluminum substrate have a cross-sectional shape with the tip bulging sideways relative to the base end, and the grooves located between the ridges are provided on the radiator fin side.
- the shape shall be one that accepts the projected ridge.
- the ridges provided on the joint surface of the radiating fins also have a cross-sectional shape with the tip bulging laterally from the base end, and the shape of the groove located between the ridges on the aluminum substrate side The shape is to accept the ridge.
- the aluminum substrate and the radiating fin can be kept in close contact with each other without using screws.
- the aluminum substrate 4 51 shown in FIG. 16 mounts the power module 300 molded with the synthetic resin as described above, and the lower surface thereof has a ridge 4 formed in parallel with each other.
- An uneven portion 456 composed of 54 and a groove 455 formed between the adjacent ridges 454 is formed.
- the ridge portion 454 is composed of a base end portion 452 and a front end portion 453 bulging laterally beyond the base end portion 452, and has a cross-sectionally C-shaped shape.
- One surface of the heat dissipating fins 55 1 constitutes a joint surface 55 6 for joining to the uneven portion 4 56 of the aluminum substrate 45 1.
- This joining surface 5 5 6 is the groove of aluminum substrate 4 5 1
- the protruding ridge portion 554 is composed of a base end portion 552 and a front end portion 553 bulging laterally beyond the base end portion 552, and has a T-shaped cross section. .
- the radiation fins 5 5 1 are plate-shaped fin members 5 protruding from the side opposite to the joining surface 5 5 6.
- the fin members 557 are formed in plurality.
- the fin members 557 are formed in a thin plate shape to increase the surface area, and are arranged at predetermined intervals to further enhance the heat radiation effect.
- the radiating fins 551, like the base material of the aluminum substrate 451, are made of a material having high thermal conductivity such as aluminum nitride and a good insulating property. It can be created by a processing method.
- the fins 5 5 4 of the radiating fins 5 5 1 are inserted into the grooves 4 5 5 of the aluminum substrate 4 5 1 and are slid parallel to the ridges 4 5 4 and 5 5 4.
- the joint can be made such that the joint surface 55 6 of the heat radiating fins 55 1 comes into close contact with the uneven portion 45 6 of the aluminum substrate 45 1.
- the ridges 4 5 4, the grooves 4 5 5 of the aluminum substrate 4 51, and the ridges 5 5 4 and the grooves 5 5 5 of the heat radiation fin 5 5 1 engage with each other. This restricts the movement of the aluminum substrate 451 and the radiation fins 551 in the direction away from each other, and makes it possible to maintain the close contact state. This makes it possible to maintain high heat transfer efficiency between the aluminum substrate 451 and the heat radiation fins 551, and it is also possible to omit mounting screws and the like.
- the aluminum substrate 461 shown in FIG. 17 is for mounting the power module 300 molded with a synthetic resin as described above, and the lower surface thereof has a ridge 4 formed in parallel with each other.
- An uneven portion 466 is formed, which is composed of a groove 64 formed between the adjacent ridges 64.
- the ridge portion 464 is composed of a base portion 462 and a tip portion 463 bulging laterally beyond the base portion 462.
- the shapes of the ridge portion 464 and the groove portion 465 are configured such that the cross-sectional shape of the uneven portion 466 is a shape combining a curve such as a circle or an ellipse.
- the joining surface 5 6 6 has a ridge 5 6 4 that fits into the groove 4 6 5 of the aluminum substrate 4 6 1 and a groove 5 6 5 that receives the ridge 4 6 4 of the aluminum substrate 4 6 1. And can be bonded to the uneven portion 4666 of the aluminum substrate 461 in close contact.
- Protrusions 5 6 4 are proximal end 5 6 2 and proximal end
- It consists of a tip 563 that bulges more laterally than 562, and is configured so that the cross-sectional shape of the joining surface 5666 is a combination of curves such as circles or ellipses .
- the radiation fins 5 6 1 are plate-shaped fin members 5 protruding from the side opposite to the joining surface 5 6 6.
- the fin members 567 are formed in a thin plate shape to increase the surface area, and are arranged at predetermined intervals to further enhance the heat radiation effect.
- the radiating fins 561, like the base material of the aluminum substrate 461, are made of a material with high thermal conductivity such as aluminum nitride and good insulation, and are used for drawing or punching. It can be created by a processing method.
- the protrusions 4 6 4 of the aluminum substrate 4 61 are inserted into the grooves 5 6 5 of the radiation fins 5 61, and the protrusions 5 6 4 of the radiation fins 5 6 1 are inserted into the aluminum substrate.
- the joining surface 5 6 6 of the radiation fins 5 6 1 It can be joined so as to be in close contact with the irregularities 4 6 6.
- the ridges 464 of the aluminum substrate 461, the grooves 465, and the ridges 564 of the radiating fins 561 and the grooves 565 engage with each other. This restricts the movement of the aluminum substrate 461 and the radiation fins 561 in the direction in which they are separated from each other, and makes it possible to maintain the close contact state. This makes it possible to maintain high heat transfer efficiency between the aluminum substrate 461 and the heat radiation fins 561, and it is also possible to omit mounting screws and the like.
- the aluminum substrate 471 shown in FIG. 18 is for mounting the power module 300 molded with a synthetic resin as described above, and the lower surface thereof has a ridge 4 formed in parallel with each other.
- An uneven portion 474 composed of 72 and a groove 473 formed between the adjacent ridges 472 is formed.
- the protruding ridge portion 472 is formed in an inverted trapezoidal cross section in which a tip portion bulges laterally from a base end portion.
- the joint surface 5 7 4 has a protrusion 5 7 2 that fits into the groove 4 7 3 of the aluminum substrate 4 7 1, and a groove 5 7 3 that receives the protrusion 4 7 2 of the aluminum substrate 4 7 1. , And can be bonded in close contact with the uneven portion 474 of the aluminum substrate 471.
- the protruding ridge portion 572 is formed in an inverted trapezoidal cross section in which the distal end portion bulges laterally from the base end portion.
- the heat radiation fins 571 are formed with a plurality of plate-like fin members 575 protruding from the side opposite to the joint surface 574.
- the fin members 575 are formed in a thin plate shape to increase the surface area, and are arranged at predetermined intervals to further enhance the heat radiation effect.
- the heat radiation fins 571 like the base material of the aluminum substrate 471, are made of a material with high thermal conductivity such as aluminum nitride and good insulation, and are used for drawing or punching. It can be created by a processing method.
- the protrusions 4 7 2 of the aluminum substrate 4 7 1 are inserted into the grooves 5 7 3 of the heat radiation fins 5 7 1, and the protrusions 5 7 2 of the heat radiation fins 5 7
- the joint surface 5 7 4 of the radiation fin 5 7 1 is made of aluminum by sliding into the groove 4 7 3 of the substrate 4 7 1 and sliding in parallel with each ridge 4 7 2 and 5 7 2. It can be bonded so as to be in close contact with the uneven portion 474 of the substrate 471.
- the protrusions 4 72 of the aluminum substrate 4 71, the grooves 4 7 3, and the protrusions 5 7 2 and the grooves 5 7 3 of the heat radiation fin 5 7 1 engage with each other.
- the shape of the concavo-convex portion of the aluminum substrate and the shape of the joint surface of the radiation fin are not limited to those shown in the figure, and a shape having good heat transfer efficiency can be appropriately selected.
- the circuit configuration in the module is not limited to that shown in the figure. For various modules equipped with circuit components that are considered to generate a large amount of heat, the configuration of the uneven portions of the aluminum board and the radiation fins It is possible to apply
- the radiating fins 331 are simply provided upright on the back side of the mounting surface of the aluminum substrate 301.
- the radiating fins 331 can be formed by integral molding at the same time when the aluminum nitride plate constituting the aluminum substrate 301 is formed. It is also possible to configure so as to stick.
- the connection between the bare chip component and the wiring on the mounting board can be configured by wire bonding or the like, and since this wiring portion is molded by the molding material, The effect of noise can be eliminated by making the wiring section short, and since there is no exposed part, it is possible to prevent the effects of corrosion, dust, and the invasion of small animals.
- connection between the bare chip component and the wiring on the mounting board can be configured by wire bonding or the like, the wiring portion can be configured to be short, and a component that generates a large amount of heat is generated. Can be configured to dissipate heat via an aluminum substrate.
- the power module according to the third aspect of the present invention by adopting a hybrid configuration in which circuit components having relatively low heat generation are mounted on a printed circuit board, it is possible to insulate heat from other circuit components having high heat generation. .
- the work of filling the molding material into the space formed by the mounting substrate and the side wall is facilitated, and the bare chip component mounting surface of the mounting substrate can be reliably molded. Become.
- circuit elements using a conductor pattern embedded inside the side wall, and to connect a circuit element such as an electrolytic capacitor, which is difficult to integrate, to the side wall. It can be implemented via
- the inverter circuit and the control section of the inverter circuit are directly mounted on the mounting board as a base chip component to form a module, thereby spatially designing each component. It is not necessary to consider the heat and thermal design again, and the effect of noise can be minimized by shortening the wiring distance, and the effects of corrosion, dust, and small animals can be prevented.
- each part may be configured by one or a plurality of bare chip components, and the components may be mounted on an aluminum substrate. did Therefore, there is no need to consider spatial layout design or thermal design as a dedicated design again.
- the size of the device can be reduced, and the influence of noise, corrosion, dust, and small animals can be reduced.
- a highly reliable device can be provided by eliminating the effects of intrusion.
- this power module as a single component, there is no need to design a dedicated structure for each type of compressor to be installed, greatly reducing the man-hours required for structural design for a wide variety of models. Can be reduced.
- the fan motor control unit composed of bare chip components is mounted on an aluminum substrate together with other circuit components to be modularized, so that the device can be downsized. There is no need to reconsider the spatial layout design and thermal design.
- the size of the device can be reduced, and the influence of noise, corrosion, dust, and invasion of small animals can be achieved. And a highly reliable device can be provided.
- the influence of noise can be eliminated by modularizing the power supply unit for controlling the power supplied to the compressor of the air conditioner. .
- the size of the apparatus can be reduced by modularizing the rotation control of the fan motor of the air conditioner including the fan motor control unit.
- a highly reliable device can be provided by eliminating the effects of noise, corrosion, dust, and the invasion of small animals.
- the heat generated from the circuit components mounted on the mounting surface can be efficiently radiated by the concave and convex portions formed on the heat radiation surface of the mounting substrate.
- heat can be efficiently radiated from the heat radiating surface even when the mounting surface side is molded with an insulating synthetic resin or the like to form a sealed module.
- the aluminum-based metal having high thermal conductivity is used as the mounting substrate, heat from the circuit components mounted on the mounting surface can be efficiently radiated. Becomes possible. '
- the joint surface of the radiating fin has an uneven shape so as to be in close contact with the radiating surface of the mounting board, and the heat transfer efficiency between the radiating fin and the mounting board is reduced. Will be improved. Therefore, the heat generated from the circuit components mounted on the mounting board is efficiently transmitted to the radiation fins, and the radiation efficiency can be increased.
- the surface area of the heat radiating surface of the mounting board is increased by the ridges having a rectangular cross section and the groove formed between the adjacent ridges, and the heat radiation effect is improved. Can be improved.
- the contact area between the heat radiating surface of the mounting substrate and the joint surface of the heat radiating fins increases, and the heat transfer efficiency of each other improves, so that the heat radiating effect can be enhanced.
- the ridge having a triangular cross section and the groove formed between the adjacent ridges increase the surface area of the heat radiation surface of the mounting board, thereby improving the heat radiation effect. Can be improved.
- the contact area between the heat radiating surface of the mounting substrate and the joint surface of the heat radiating fins increases, and the heat transfer efficiency of each other improves, so that the heat radiating effect can be enhanced.
- the surface of the heat radiating surface of the mounting board is increased by the ridge having a trapezoidal cross section and the groove formed between the adjacent ridges, and the heat radiation effect is improved. Can be improved.
- the contact area between the heat radiating surface of the mounting board and the joint surface of the heat radiating fins increases, and the heat transfer efficiency of each other improves, so that the heat radiating effect can be enhanced.
- the surface area of the heat dissipation surface of the mounting board is increased by the ridges having a semicircular cross section and the groove formed between the adjacent ridges. The effect can be improved.
- the contact area between the heat radiating surface of the mounting substrate and the joint surface of the heat radiating fins increases, and the heat transfer efficiency of each other improves, so that the heat radiating effect can be enhanced.
- the tip is formed in a hemispherical shape. Due to the plurality of protrusions, the surface area of the heat radiation surface of the mounting board is increased, and the heat radiation effect can be improved. In addition, when the heat radiation fins are attached, the contact area between the heat radiation surface of the mounting board and the joint surface of the heat radiation fins increases, and the heat transfer efficiency between the heat radiation fins increases, so that the heat radiation effect can be enhanced.
- the ridge having a cross-sectional shape in which the distal end bulges laterally with respect to the base end, and the groove for receiving the ridge on the other side. Therefore, the contact area between the heat dissipating surface of the mounting board and the joint surface of the heat dissipating fins increases, and the heat transfer efficiency of each other improves, so that the heat dissipating effect can be enhanced.
- the mounting board and the radiating fin are restricted from moving in the direction away from each other by the engagement of the ridge and the groove, and the close contact state is maintained without using fixing means such as screws. It can be a structure.
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- Engineering & Computer Science (AREA)
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
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- Chemical & Material Sciences (AREA)
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- Inverter Devices (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR10-2003-7003450A KR20030060888A (ko) | 2001-07-09 | 2002-07-01 | 파워 모듈 및 공기 조화기 |
AU2002315755A AU2002315755B2 (en) | 2001-07-09 | 2002-07-01 | Power module and air conditioner |
EP02741385A EP1406303A4 (en) | 2001-07-09 | 2002-07-01 | POWER MODULE AND AIR CONDITIONER |
US10/399,749 US7003970B2 (en) | 2001-07-09 | 2002-07-01 | Power module and air conditioner |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2001-208421 | 2001-07-09 | ||
JP2001208421A JP2003023280A (ja) | 2001-07-09 | 2001-07-09 | パワーモジュール |
JP2001208420 | 2001-07-09 | ||
JP2001-208420 | 2001-07-09 |
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WO2003007376A1 true WO2003007376A1 (en) | 2003-01-23 |
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PCT/JP2002/006659 WO2003007376A1 (en) | 2001-07-09 | 2002-07-01 | Power module and air conditioner |
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US (1) | US7003970B2 (ja) |
EP (1) | EP1406303A4 (ja) |
KR (1) | KR20030060888A (ja) |
CN (1) | CN1242474C (ja) |
AU (1) | AU2002315755B2 (ja) |
WO (1) | WO2003007376A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005015970A2 (de) * | 2003-07-30 | 2005-02-17 | Kermi Gmbh | Kühlvorrichtung für ein elektronisches bauelement, insbesondere für einen mikroprozessor |
WO2009110045A1 (ja) * | 2008-03-05 | 2009-09-11 | 株式会社 東芝 | 発熱体搭載部品の取付構造 |
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Also Published As
Publication number | Publication date |
---|---|
EP1406303A1 (en) | 2004-04-07 |
KR20030060888A (ko) | 2003-07-16 |
AU2002315755B2 (en) | 2004-10-21 |
CN1465099A (zh) | 2003-12-31 |
CN1242474C (zh) | 2006-02-15 |
EP1406303A4 (en) | 2007-12-12 |
US7003970B2 (en) | 2006-02-28 |
US20040040327A1 (en) | 2004-03-04 |
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