JP2002228200A - Control board and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily cut a jumper line even when a control board is arranged with a surface on which parts are mounted directed downward in an air conditioner. SOLUTION: A through hole 45e is provided on an insulating plate 45a in a part where the jumper line 60 of the control board 45 for controlling the air conditioner is mounted. Thus, even when the control board 45 is attached while the surface on which the parts are mounted is directed downward, the jumper line 60 can be cut through the through-hole 45e from an opposite surface without detaching the control board 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control plate, and more particularly to a control plate used for an air conditioner. The present invention also provides
The present invention relates to an air conditioner, particularly to an air conditioner including a control plate.

[0002]

2. Description of the Related Art In a separate type air conditioner including an indoor unit and an outdoor unit, when a signal (operation mode, set room temperature, etc.) from a remote controller is received by an indoor unit, the signal is transmitted to an electric cable. Is transmitted to the control panel of the outdoor unit via the. The control plate controls the refrigerant circuit based on the received signal (operation mode, set room temperature, etc.), and cool air or warm air is supplied from the indoor unit to the room. Further, the temperature of the cool air or warm air is adjusted so that the room temperature becomes the set room temperature.

[0003] The length of the refrigerant pipe between the indoor unit and the outdoor unit differs depending on the place where the air conditioner is installed. For this reason,
A jumper wire is provided on the control board in advance so that the connection of the electronic components on the control board can be changed. At the site of the installation work, the length of the refrigerant pipe is checked, and if necessary, the jumper wire on the control plate is cut so that an air conditioning capacity suitable for the length of the pipe at the installation location is obtained.

[0004]

Devices constituting a refrigerant circuit, such as an outdoor heat exchanger, a compressor, and a four-way switching valve, are arranged below the outdoor unit, and an electrical box is arranged above the refrigerant circuit. A control board is attached to this electrical box. At this time, if the control plate is mounted with the component mounting surface facing downward, it is possible to prevent foreign matter from adhering to the component mounting surface.

[0005] However, when the electronic component is mounted with the component mounting surface down, it is necessary to temporarily remove the control plate from the electrical box and cut the jumper wire mounted on the component mounting surface. In this case, the man-hour required for the installation work increases. In addition, since the control board is removed at the installation work site, erroneous wiring is likely to occur when the control board is reinstalled. On the other hand, if a jumper wire is provided on the solder surface in order to perform the operation without removing the control plate, the number of steps of the mounting operation increases, which may increase the cost.

An object of the present invention is to make it possible to easily cut a jumper wire in an air conditioner even when a control board is arranged with a component mounting surface facing down, while suppressing an increase in cost. .

[0007]

According to a first aspect of the present invention, there is provided a control plate for controlling an air conditioner, comprising a conductor pattern, an insulating plate, an electronic component, and a jumper wire.
The conductor pattern electrically connects the electric components. The insulating plate is formed of an insulating material and has a conductor pattern disposed on a surface. The insulating plate has an insertion hole electrically connected to the conductor pattern and through which a lead of an electronic component can be inserted, and a through hole penetrating from the front surface to the back surface between the insertion holes. The leads of the electronic component are inserted into the insertion holes and are electrically connected by the conductor pattern. The jumper wires are arranged to electrically short the two of the insertion holes.

[0008] In the control plate according to the first aspect, electronic components are arranged on the control plate, and a control circuit formed by the electronic components controls the air conditioner. The connection of the electronic components on the control plate is changed according to the length of the refrigerant pipe connecting the indoor unit and the outdoor unit of the air conditioner, so that the air conditioner is appropriately controlled. At the installation site of the air conditioner, the jumper wire is cut from the surface of the control plate opposite to the component mounting surface via a through hole.

According to the control plate of the first aspect, even when the control plate is mounted on the electrical box with the component mounting surface facing downward so that foreign matter does not adhere to the component mounting surface, the control plate is not removed and the opposite operation is performed. The jumper wire can be cut from the side surface through the through hole.

[0010] According to a second aspect of the present invention, in the control plate according to the first aspect, the jumper wire is arranged so as to change the air conditioning capacity of the air conditioner by being cut. According to the control plate according to the second aspect, the jumper wire can be cut through the through hole from the opposite surface without removing the control plate, and the air conditioning capacity of the air conditioner can be changed.

According to a third aspect of the present invention, in the control panel according to the first aspect, the jumper wire is arranged so as to change the noise level of the air conditioner by being cut. According to the control plate according to the third aspect, the jumper wire can be cut through the through hole from the opposite surface without removing the control plate, and the noise level of the air conditioner can be changed.

An air conditioner according to a fourth aspect includes an indoor unit, a refrigerant pipe, an outdoor unit, and a control plate. The indoor unit causes indoor air to exchange heat with the refrigerant, and supplies cool air or warm air to the room. One end of the refrigerant pipe is connected to the indoor unit, and the refrigerant pipe can flow the refrigerant. The outdoor unit is connected to the other end of the refrigerant pipe to form a refrigerant circuit together with the indoor unit and the refrigerant pipe, and supplies the compressed or decompressed refrigerant to the indoor unit via the refrigerant pipe. The control plate according to any one of claims 1 to 3, wherein the control plate is arranged in the outdoor unit and controls the refrigerant circuit. According to the air conditioner of the third aspect, the same effect as in the case of the control plate according to any one of the first to third aspects is achieved.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Overall Configuration] FIG. 1 is a block diagram showing a schematic configuration of an air conditioner according to one embodiment of the present invention. The air conditioner of the present invention includes a refrigerant circuit 1, a drive circuit 2, and a control circuit 3, as shown in FIG. The control circuit 3 controls the refrigerant circuit 1 and the drive circuit 2, drives the refrigerant circuit 1 by the output from the drive circuit 2, controls the flow of the refrigerant in the refrigerant circuit 1, and adjusts the room temperature.

FIG. 2 shows a specific configuration of the refrigerant circuit 1.
The refrigerant circuit 1 is connected to a compressor 11, a four-way switching valve 12 connected to the discharge side of the compressor 11, an outdoor heat exchanger 13 connected to the four-way switching valve 12, and an outdoor heat exchanger 13. A pressure reducer (electric expansion valve) 14, an indoor heat exchanger 15 connected to the pressure reducer 14, and an accumulator 16. Compressor 11, four-way switching valve 12, outdoor heat exchanger 1
3, the decompressor 14 and the accumulator 16 are provided in the outdoor unit, and the indoor heat exchanger 15 is provided in the indoor unit. In the outdoor unit and the indoor unit, fans for supplying airflow to the outdoor heat exchanger 13 and the indoor heat exchanger 15 are arranged.

The compressor 11 sucks the refrigerant from the suction side,
This is a device that compresses the refrigerant and discharges the compressed refrigerant from the discharge side. The four-way switching valve 12 has four pipe connection parts (A,
B, C, D), and pipes connected to each other are conducted between A and B and between C and D (solid line) or between A and D and between B and C (dotted line), thereby forming a flow path. Is a device for changing The outdoor heat exchanger 13 is formed by folding a refrigerant pipe to have an L shape in plan view. The reason why the shape is an L shape in a plan view is to increase the contact area with the air flow. The decompressor 14 is a device that decompresses and discharges the refrigerant, for example, an electric expansion valve is used. The indoor heat exchanger 15 is composed of a plurality of flat fins arranged in parallel and a refrigerant pipe penetrating therethrough. The fins are formed of a material having good heat conductivity such as aluminum in order to increase the heat exchange efficiency between the air and the refrigerant, and a plurality of the fins are arranged in parallel to increase the contact area with the air. . Accumulator 1
Reference numeral 6 denotes a device connected to the suction side of the compressor 11 for preventing liquid refrigerant from entering the compressor 11.

FIG. 3 shows the structure of the drive circuit 2 for driving the refrigerant circuit 1. The drive circuit 2 mainly includes a rectifier circuit 21 and an inverter 22. The rectifier circuit 21 includes a diode bridge, a large-capacity aluminum electrolytic capacitor, and the like, and has an input side connected to the commercial power supply 20. The inverter 22 is a bridge circuit including a power element such as an FET or an IGBT, and is driven by a drive signal from the control circuit 3. In this drive circuit, the commercial power supply 2
When power from 0 is input to the rectifier circuit 21, it is rectified by the diode bridge of the rectifier circuit 21 and smoothed by the aluminum electrolytic capacitor. The rectified and smoothed power is input to the inverter 22. Inverter 2
When the two power elements are driven by the drive signal from the control circuit 3, the output from the rectifier circuit 21 is converted into a power signal of a predetermined frequency and output to the motor 11a of the compressor 11. Thus, the compressor 11 is driven.
Further, by adjusting the frequency of the drive signal from the control circuit 3, the rotation frequency of the compressor 11 is adjusted, and the cooling or heating capacity is adjusted.

FIG. 4 shows the configuration of the control circuit 3. The control circuit 3 mainly includes a control unit 30, a memory 31, a sensor 3,
2, a circuit board 33, an indoor unit microcomputer 51, an I / F 52, a receiving unit 53, and a sensor 54. The indoor unit microcomputer 51, the I / F 52, the receiving unit 53, and the sensor 54 are provided in the indoor unit 50. The control unit 30 and the memory 3
1, the sensor 32 and the drive circuit 2 are mounted on a control plate 45 of the outdoor unit 40 as described later.

The control unit 30 includes a refrigerant circuit 1 and a drive circuit 2
This is a configuration for controlling. The control unit 30 includes a microprocessor that executes a program of a predetermined control procedure to control the refrigerant circuit 1 and the drive circuit 2, and a drive circuit that generates a drive signal to be output to the drive circuit 2. I have. The memory 31 stores a set room temperature, a set humidity, an operation mode, a control procedure program, and the like. The memory 31 may be provided separately from the control unit 30 as shown in FIG. 4 or may be built in the microprocessor.
The sensors 32 include a temperature sensor that detects an outside air temperature and a temperature sensor that detects a refrigerant pipe temperature. Circuit board 33
Is a drive circuit 2, a control unit 30, a commercial power supply 20, and an I / F
52. The electric circuit board 33 includes a noise removal circuit that removes an electric signal from the I / F 52 and noise included in the commercial power supply 20, and an interface circuit that converts the electric signal from the I / F 52 into an electric signal that can be received by the control unit 30. Contains. The indoor unit microcomputer 51 includes the receiving unit 5
3. The electric signal from the sensor 54 is transmitted to the electric circuit board 33 via the I / F 52. The I / F 52 is an indoor unit microcomputer 5
1 is converted into an electric signal of a predetermined level and output to the electric circuit board 33. The receiving unit 53 receives a signal from a remote controller or the like and outputs the signal to the indoor unit microcomputer 51. The sensors 54 include a temperature sensor for detecting room temperature and a humidity sensor for detecting indoor humidity.

[Air-conditioning operation] In such an air conditioner,
When the receiving unit 53 receives the operation mode, the set room temperature, and the like, the instruction signal is output from the microcomputer 51 to the I / F 52, converted into an electric signal of a predetermined level, and output to the electric circuit board 33. This electric signal (operation mode, set room temperature)
The noise is removed by the noise removal circuit of the circuit board 33, and the interface circuit converts the noise into an electric signal that can be received by the microcomputer. Then, these commands (operation mode, set room temperature) are stored in a predetermined area of the memory 31 by the control unit 30. The control unit 30 controls the refrigerant circuit 1 based on the command (operation mode, set room temperature) and a program stored in the memory 31 and outputs a drive signal to the drive circuit 2. Specifically, the control unit 30 switches the four-way switching valve 12 and adjusts the valve of the pressure reducer 14 to a predetermined opening. In addition, the compressor 11 of the refrigerant circuit 1 is driven by converting the power input from the commercial power supply 20 to the drive circuit 2 via the electric circuit board 33 into a power signal of a predetermined frequency.

Hereinafter, the flow of the refrigerant in the refrigerant circuit 2 during cooling and heating will be described with reference to FIG. During the cooling operation, the four-way switching valve 12 is set to the position indicated by the solid line,
4 is reduced to a predetermined opening, and the compressor 11 is started. The high-pressure refrigerant discharged from the compressor 11 is condensed in the outdoor heat exchanger 13 and then decompressed by the decompressor 14. After the decompressed low-pressure refrigerant evaporates in the indoor heat exchanger 15, the four-way switching valve 1
2. Return to the compressor 11 via the accumulator 16. When the refrigerant evaporates in the indoor heat exchanger 15, the indoor air deprives the refrigerant of heat, and the deprived indoor air acts as cool air.

During the heating operation, the four-way switching valve 12 is set to the position indicated by the dotted line, and the pressure reducer 14 is throttled to a predetermined opening degree.
Start The high-pressure refrigerant discharged from the compressor 11 is condensed in the indoor heat exchanger 15 and then decompressed by the decompressor 14. The decompressed low-pressure refrigerant evaporates in the outdoor heat exchanger 13 and returns to the discharge side of the compressor 11 via the four-way switching valve 12 and the accumulator 13. When the refrigerant is condensed in the indoor heat exchanger 15, heat is released to the room air, and the room air that has absorbed this heat acts as warm air.

[Control Board] Hereinafter, the specific configuration and arrangement of the outdoor unit 40 and the indoor unit 50 of the air conditioner according to the present embodiment will be described, and then the control board 45 will be described.

FIG. 5 is a perspective view of the indoor unit 40 and the indoor unit 50 of the air conditioner according to the present embodiment. FIG. 6 is a perspective view of the inside of the outdoor unit 40. The outdoor unit 40 is installed outdoors with the rear surface facing the building, and the outdoor heat exchanger 13 removes outside air sucked from the rear surface by a propeller fan (not shown).
And discharged from the front. The indoor unit 50 brings the indoor air sucked from above into contact with the indoor heat exchanger 15,
The air is supplied into the room from the outlet by a cross flow fan (not shown).

The indoor unit 50 includes the indoor heat exchanger 1 described above.
5. The indoor unit microcomputer 51, the I / F 52, the receiving unit 53, and the sensor 54 are provided inside the main body casing 55. As shown in FIG. 5, the outdoor unit 40 includes a main body casing 41 and a closing valve cover 42. Inside, the outdoor heat exchanger 13 and the machine room 43 are installed as shown in FIG.
And an electrical box 44.

The machine room 43 is provided with a compressor 11, a four-way switching valve 12, a pressure reducer 14, and an accumulator 16. These compressor 11, four-way switching valve 12, pressure reducer 1
As shown in FIG. 2, the accumulator 4, the accumulator 16 and the outdoor heat exchanger 13 are connected by refrigerant pipes, respectively, and further connected to the indoor heat exchanger 15 by pipes 46 and 47.

The control box 45 and the electric circuit board 3
3 are provided. As shown in FIG. 6, the electric circuit board 33 is arranged along one end of the control board 45 and is electrically connected to the control unit 30 on the control board 45 and the input side of the drive circuit 2. In the terminal section 66, the commercial power supply 20 and the indoor unit 50 (I / F5
2) is connected.

The control plate 45 is a control device in which a conductor pattern is drawn on an insulating plate 45a (FIG. 7) made of epoxy resin or phenol resin. As described above, the control unit 30, the memory 31, the sensor 32, and the drive circuit 2 are mounted on the control board 45. The output of the drive circuit 2 is connected to the compressor 11, and the control unit 30 is connected to the four-way switching valve 12 and the pressure reducer 14. Several jumper wires 60 (FIG. 7) are mounted on the component mounting surface so as to electrically short-circuit the through holes 45d (FIG. 7). By cutting the jumper wire 60 as necessary, the air conditioning capacity and noise of the air conditioner can be adjusted. At the installation site of the air conditioner, by checking the lengths of the refrigerant pipes 46 and 47 and cutting some jumper wires, an appropriate air conditioning capacity can be obtained at the installation site. The control plate 45 is attached to the electrical box 44 with the component mounting surface facing downward so that foreign substances are unlikely to adhere to the component mounting surface.

FIG. 7A is an enlarged plan view of the mounting position of the jumper wire 60 on the control board 45, and FIG. 7B is a sectional view thereof. On the component mounting surface of the control plate 45, as shown in FIG. 7, a conductor pattern 45b is disposed on an insulating plate 45a, and a land 45c formed of a conductive material is formed continuously with the conductor pattern 45b. I have. A through hole 45d is formed in the land 45c, and a conductive material is disposed on the inner wall of the through hole 45d.
The land 45c and the land 45 on the back surface are interposed through this conductive material.
f are electrically connected. Also, jumper wire 6
0 between the through holes 45d on which the
A through hole 45e is formed on 5a. To mount the jumper wire 60, both ends of the jumper wire 60 are inserted into the through holes 45d, and the jumper wires 60 are fixed such that the tips protrude from the back surface. After that, the tip of the jumper wire is fixed on the back surface with solder 70. In this way, the two through holes 45d are short-circuited, and the conductor pattern 45b connected to them is also short-circuited.

When the control plate 45 is mounted on the electrical component box 44, the component mounting surface faces downward as shown in FIG. 7B. In the control plate 45 of the present embodiment, the jumper wire 60
A through-hole 45e is formed in the insulating plate 45 in a portion where the central portion is disposed, and the component mounting surface and the back surface are spatially connected through the through-hole 45e.

The control plate 45 of the present embodiment can be mounted on the control box 45 with the component mounting surface facing downward so that foreign matter does not adhere to the component mounting surface.
The jumper wire 60 can be cut through the through hole 45e from the back without removing the jumper wire 5.

[0031]

According to the control plate of the first aspect, even when the control plate is mounted on the electrical box with the component mounting surface facing downward so that foreign matter does not adhere to the component mounting surface, the control plate is not removed. The jumper wire can be cut from the opposite surface via the through hole.

According to the control plate of the second aspect, the jumper wire can be cut through the through hole from the opposite surface without removing the control plate, thereby changing the air conditioning capacity of the air conditioner. Can be.

According to the control plate of the third aspect, the jumper wire can be cut through the through hole from the opposite surface without removing the control plate, thereby changing the noise level of the air conditioner. Can be.

According to the air conditioner of the fourth aspect, the same effect as in the case of the control plate according to any one of the first to third aspects is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of an air conditioner according to an embodiment of the present invention.

FIG. 2 shows the refrigerant circuit.

FIG. 3 is a drive circuit thereof.

FIG. 4 is a control circuit thereof.

FIG. 5 is a perspective view of an air conditioner according to an embodiment of the present invention.

FIG. 6 is the inside of the outdoor unit.

FIG. 7 is an enlarged view of a jumper wire mounting portion of the control board.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 refrigerant circuit 40 outdoor unit 45 control plate 45a insulating plate 45b conductive pattern 45c, 45f land 45d through hole (insertion hole) 45e through hole 46, 47 refrigerant pipe 50 indoor unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinji Ehira 1000-2 Oya, Okamotocho, Kusatsu City, Shiga Prefecture Daikin Industries, Ltd. Shiga Works F-term (reference) 5E317 AA11 AA24 BB01 BB11 CC03 CD40 GG16 5E338 AA01 BB02 BB13 BB75 CC01 CD03 CD05 EE11 EE32 5E343 AA07 AA11 BB08 BB21 BB61 BB68 DD75 ER51 GG11

Claims (4)

[Claims] 1. A control board for controlling an air conditioner, comprising: a conductor pattern; and a conductor pattern formed of an insulating material, wherein the conductor pattern is disposed on a surface and electrically connected to the conductor pattern. An insulating plate having an insertion hole into which a lead of a component can be inserted, and a through hole penetrating from the front surface to the back surface between the insertion hole, an electronic component into which the lead is inserted into the insertion hole, and the insertion hole. A jumper wire arranged to electrically short-circuit. 2. The control board according to claim 1, wherein the jumper wire is arranged so as to change an air conditioning capacity of the air conditioner by being cut. 3. The control board according to claim 1, wherein the jumper wire is arranged to change a noise level of the air conditioner by being cut. 4. An indoor unit for exchanging heat between indoor air and a refrigerant to supply cool air or warm air to a room, a refrigerant pipe having one end connected to the indoor unit and capable of flowing a refrigerant, And an outdoor unit connected to the other end of the refrigerant unit and configured to form a refrigerant circuit together with the indoor unit and the refrigerant pipe, and to supply the compressed or decompressed refrigerant to the indoor unit through the refrigerant pipe, and to control the refrigerant circuit. An air conditioner comprising: the control plate according to claim 1.