KR19990037100A - Control Unit of Air Conditioner - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an air conditioner, wherein the control device for an air conditioner includes at least a compressor motor control circuit 13 and an outdoor fan motor control circuit 24 formed on a single printed circuit board 16. The control PC board 15 and at least the sensor circuit 20, the valve control circuit 18, and the communication circuit with the indoor unit are formed on the printed circuit board 23 for the cycle control PC board 14, Motor control PC boards with different air conditioning capacity and power supply voltage specifications, and cycle control PC boards with different function types such as single type air conditioner, multi air conditioner, refrigerant heating air conditioner, etc. It is characterized by the rapid and easy development and manufacture of the control device of the air conditioner.

Description

Control Unit of Air Conditioner

The present invention relates to a control device for an air conditioner such as a cooling air conditioner, a heat pump type air conditioner, and a refrigerant heating air conditioner by gas or oil.

In general, air conditioners include air conditioners for cooling, heat pump type air conditioners, gas air conditioners, and refrigerant heating air conditioners called petroleum air conditioners due to different configurations of the refrigeration cycle. Moreover, according to the number of the indoor units which can be connected, it can be distinguished into a single type air conditioner and a multi air conditioner, and as a multi air conditioner, there are two room air conditioners with two connected indoor units, and three room multi air conditioners with three same units. In addition, this air conditioner can be classified into various specifications due to the difference in air conditioning capacity and power supply voltage.

In the past, when various air conditioners are developed and manufactured, all circuits of various control devices suitable for various specifications such as the configuration of the refrigeration cycle, air conditioning capacity, power supply voltage, etc. are newly designed, developed, and manufactured. .

However, in such conventional air conditioners, when developing air conditioners having different specifications such as air-conditioning capacity, input power supply voltage, and the number of indoor units that can be connected, the entire circuit of the control device is restarted even if there are few changes. Since it is necessary to design and develop a new PC version, there is a problem that it requires a lot of time and human hands.

The present invention has been made in view of such circumstances, and its object is to provide various motor control PC boards having different air conditioning capacity and power supply voltage specifications, single type air conditioners or multi-air conditioners, air conditioners for cooling, heat pump type air conditioners, refrigerant heating air conditioners, and the like. The present invention provides a control device for an air conditioner capable of quickly and easily developing and manufacturing a control device for various air conditioners having different specifications by modularizing and combining various different cycle control PC boards. .

1 is a plan view of a control device of an air conditioner according to a first embodiment of the present invention;

2 is a refrigeration cycle diagram of an air conditioner with an outdoor control device shown in FIG. 1;

FIG. 3 is a diagram showing each type of the cycle control PC board and the motor control PC board shown in FIG. 1 and a combination example thereof; FIG.

4 is a longitudinal sectional view of a controller box accommodating a cycle control PC board and a motor control PC board shown in FIG. 1;

FIG. 5 is a plan sectional view when the planar section of the controller box shown in FIG. 4 is viewed from the bottom.

6 is a side cross-sectional view of FIG. 5.

* Explanation of symbols for main parts of the drawings

12: outdoor control device

14,14A, 14B, 14C, 14D, 14E: PC version for cycle control

15,15A, 15B, 15C, 15D: PC board for motor control

16: Printed board of PC board for cycle control

18: valve control circuit 19: sensor circuit

21,26: Connector 22: MCU of PC board for cycle control

23: Printed board of motor control PC board 24: Outdoor fan motor control circuit

25: power supply circuit for control circuit 27: MCU of PC board for motor control

A control device for an air conditioner according to the invention of claim 1 is a control device for an air conditioner having a compressor motor control circuit, a fan motor control circuit, a sensor circuit, a valve control circuit, and a communication circuit with an indoor unit. The motor control PC board formed by forming the compressor motor control circuit and the fan motor control circuit on one printed board, and the cycle control system formed by forming at least one communication circuit with the sensor circuit, the valve control circuit, and the indoor unit on the printed board. It is characterized by comprising the PC version.

According to the present invention, since various motor control PC boards having different specifications such as air-conditioning capacity and power supply voltage and different cycle control PC boards such as a single type air conditioner, a multi-air conditioner, and a refrigerant heating air conditioner are modularized, the two PC boards are suitable. In this way, various control devices having different specifications can be developed and manufactured quickly and easily.

The controller of the air conditioner according to the second aspect of the invention is characterized in that the PC board for motor control is configured for each type having different air conditioning capacity and power supply voltage such as AC 100V and AC200V / 230V for different air conditioning capabilities.

According to the present invention, in addition to the effect of the invention of claim 1, since the PC board for motor control includes AC100V and AC200V / 230V, etc., for an air conditioner having a specification of an input power supply voltage of AC100V and AC200V / 230V, Selective use of the PC board eliminates the need to redesign the entire circuit of the control device from the beginning and develop a new one from the PC board, making it possible to develop and manufacture quickly and easily.

The controller of the air conditioner according to the invention of claim 3 is characterized in that the cycle control PC board is configured for each type having different functions such as single type air conditioner control, multi air conditioner control, and refrigerant heating air conditioner.

According to the present invention, in addition to the effect of the invention of claim 1 or 2, the cycle control PC board includes a single type air conditioner control, a multi-air conditioner control, a refrigerant heating air conditioner control, and the like. The entire circuit of the control device is redesigned from the beginning, and there is no need to develop a new PC board, so it can be developed and manufactured quickly and easily.

The controller of the air conditioner according to the invention of claim 4 has a motor control PC board having a control circuit power supply circuit mounted on the printed board, and from this power supply circuit to supply power to the motor control PC board and the cycle control PC board. It is characterized by being configured.

According to the present invention, in addition to the effect of the invention according to any one of claims 1 to 3, power can be supplied from the control circuit power supply circuit of the motor control PC board to the motor control PC board and the cycle control PC board. Even if the combination of the PC boards is modified in various ways, power can be supplied to the motor control PC board and the cycle control PC board. For this reason, it is not necessary to develop a power supply circuit for a control circuit even in an air conditioner having a different specification, so that the control device can be developed and manufactured quickly and easily.

In the controller of the air conditioner according to the invention of claim 5, the PC board for motor control and the PC board for cycle control each include a microcontroller unit on each of the printed boards, and the microcontroller units are configured to communicate with each other. It is done.

According to the present invention, in addition to the operation of the invention of any one of claims 1 to 4, the PC board for motor control and the PC board for cycle control can receive data between these microcontroller units (hereinafter referred to as MCU). Therefore, for example, data such as the rotational speed of the compressor motor, the fan motor, or the like, or the current value is transmitted from the MCU mounted on the PC board for motor control to the MCU of the PC board for cycle control while the data of the cycle control PC board is transferred from the MCU. Data such as the target value of the motor rotation speed can be transmitted to the MCU of the motor control PC board.

In the control apparatus of the air conditioner of Claim 6, the PC board for motor control and the PC board for cycle control are provided in the controller box up and down, and these two PC boards are electrically connected by the lead wire.

According to the present invention, in addition to the effect of the invention of any one of claims 1 to 5, since the motor control PC board and the cycle control PC board are installed in the controller box up and down, the space for installing the two PC boards can be saved. have. Therefore, the controller box can be downsized and the lead wire connecting the two PC boards can be shortened.

A control apparatus of an air conditioner according to the invention of claim 7 is characterized in that the cycle control PC board is arranged at a projection position in the opposite direction of the motor control PC board arranged opposite to the cycle control PC board in a controller box.

According to the present invention, in addition to the effect of the invention of any one of claims 1 to 5, since the motor control PC board and the cycle control PC board are provided so as to overlap each other in the controller box, it is possible to save the installation space of these two PC boards. Can be. Therefore, the controller box can be downsized and the lead wire connecting the two PC boards can be shortened.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on FIGS. In addition, the same code | symbol is attached | subjected to the same or corresponding part in this figure.

1 is a plan view showing the overall configuration of an outdoor control apparatus of an air conditioner according to a first embodiment of the present invention, and FIG. 2 is a refrigeration cycle diagram of an air conditioner having an outdoor control apparatus shown in FIG.

As shown in FIG. 2, the air conditioner includes a compressor (1), a four-way valve (2), an indoor heat exchanger (4) having an indoor fan (3), an electric expansion valve (5), and an outdoor fan (6). The outdoor heat exchanger 7 provided is sequentially connected by the refrigerant pipe 8 to constitute a closed refrigeration cycle for circulating the refrigerant. 1, "9" is an indoor unit, "10" is an outdoor unit, and "11" is an external air temperature sensor for detecting external temperature.

The outdoor controller 12 includes a compressor motor control circuit 13 for controlling the rotation speed of the compressor 1, a four-way valve 2, an electric expansion valve 5, and an outdoor fan by means of signal lines shown by dotted lines in the figure. The motors 6a are electrically connected to each other.

The outdoor control device 12 operates the four-way valve 2 in response to a control command signal from a remote controller or the like not shown, to cool the refrigerant by circulating a refrigeration cycle in the direction of the broken arrow in the drawing, and the direction of the solid arrow in the drawing. By circulating the refrigeration cycle to the heating operation is made.

In addition, the outdoor controller 12 controls the rotation speed of the compressor 1 through the compressor fan motor control circuit 13 and also controls the rotation speed of the outdoor fan motor 6a or opens the electric expansion valve 5. It is configured so that data can be communicated bidirectionally with an indoor control device (not shown) by means of a communication circuit (not shown).

1 is a plan view showing the overall configuration of the outdoor control device 12. The outdoor control device 12 is composed of a cycle control PC board 14 and a motor control PC board 15.

The cycle control PC board 14 includes a single printed circuit board (PC board) 16, a four-way valve 2 shown in FIG. 2, an electric expansion valve 5, and an open / close valve (not shown). Valve control circuit 18 for switching control, opening degree to opening / closing control, and a sensor 19 such as an external temperature sensor 11 shown in FIG. 2, while reading the temperature detection value. The sensor circuit 20, the communication circuit which is not shown in figure, and the connector 21 which can mutually communicate data with the indoor control apparatus which is not shown in figure are also formed, respectively.

In addition, the cycle control PC board 14 mounts a cycle control MCU (microcontroller unit) 22 on the PC board 16 and connects the input / output port of the MCU 22 to the printed board 16. The circuit pattern (not shown) electrically connects the valve control circuit 18, the sensor circuit 20, the communication circuit, and the connector 21, respectively.

The cycle control MCU 21 reads the actual switching angle, opening degree, and the like of the valve 17 such as the four-way valve 2 and the electric expansion valve 5 through the valve control circuit 18, and the switching angle is read. In addition, the opening degree can be controlled and required data such as the temperature detection value detected by the sensor 19 can be input through the sensor circuit 20 and accumulated in the memory.

On the other hand, the motor control PC board 15 is electrically connected to the outdoor fan motor control circuit 24 for controlling the rotation speed of the outdoor fan motor 6a and an external alternating current (AC) power supply to the one printed circuit board 23. The control circuit power supply circuit 25, the compressor motor control circuit 13, and the connector 26 for converting AC into direct current of a predetermined voltage are formed, respectively.

In addition, the motor control PC board 15 mounts the motor control MCU 27 on the printed board 23, and connects the input / output port of the MCU 27 to a circuit pattern (not shown) of the printed board 3. Thus, the outdoor fan motor control circuit 24, the control circuit power supply circuit 25, the compressor motor control circuit 13, and the connector 26 are electrically connected to each other. 1, reference numeral 30 denotes an electrolytic capacitor, and 31 denotes a giant transistor G-Tr.

The motor control MCU 27 reads the actual rotational speed of the outdoor fan motor 6a through the outdoor fan motor control circuit 24, and can control the rotational speed thereof, and at the same time, the compressor motor control circuit ( Through 13), the actual rotation speed of the compressor 1 can be read, and the rotation speed can be controlled appropriately.

In addition, the connector 26 of the motor control PC board 15 and the connector 21 of the cycle control PC board 14 are connected to two pairs of communication cables 28 as lead wires and two pairs of power lines 29. Is electrically connected to each other, and bidirectional data communication is possible between the motor control MCU 27 and the cycle control MCU 22, and the motor control PC board from the control circuit power supply circuit 25 of the motor control PC board 15 15) and the cycle control PC board 14, which is configured to supply power.

For example, the motor control MCU 27 reads the actual rotation speed of the outdoor fan motor 6a through the outdoor fan motor control circuit 24 and at the same time the compressor 1 through the compressor motor control circuit 13. Can read the actual rotation speed, and can transmit this actual rotation speed to the MCU 22 of the PC board 14 for cycle control.

On the other hand, the cycle control MCU 22 is configured to transmit necessary data such as the outdoor fan motor 6a and the motor target rotational speed of the compressor 1 stored in the memory to the motor control MCU 27.

FIG. 3 is a table showing some examples of the types and combinations of the cycle control PC board 14 and the motor control PC board 16 configured as described above.

For example, as the type of motor control PC board 15, the same type PC board 15A for 1 class (up to 100V) and 40 class copper boards for 1 class 200 (V) depending on the input power supply voltage (V) and air conditioning capacity (class). Copper PC board (15B) for 40/50 class, copper PC board (15C) for 40/50 class at 3 ø 200V, for world wide inverter with specifications of power supply voltage and required air conditioning PC board 15D etc. are mentioned.

On the other hand, as the type of cycle control PC board 14, the copper PC board 14A for two-room multi-air conditioners with two indoor units to be connected, the copper PC board 14B for three-room multi-air conditioners with three indoor units to connect, and a refrigerant | coolant Other than the above, such as copper PC board 14C for gas air-conditioner whose hot fuel is gas, copper PC board 14D for petroleum air-conditioner whose fuel of refrigerant heater is petroleum, and single type air conditioner which has one indoor unit 1 connected to it And other copper PC boards 14E for air conditioners.

Therefore, according to this combination of FIG. 3, since five types of cycle control PC boards 14A-14E can be combined with respect to four types of motor control PC boards 15A-15D, 20 types of combinations are possible. .

Therefore, for the above 20 outdoor control devices 11 having different input power supply voltages, air conditioning capacity specifications, and refrigeration cycle configurations, the state of development and all control circuits need not be redesigned to develop a new PC board. Can save labor and manpower. Incidentally, the PC boards 14A to 14E and 15A to 15D are not limited to the above types but may increase or decrease the types as appropriate.

4 is a longitudinal cross-sectional view of the controller box 32 showing a state in which the motor control PC board 15 and the cycle control PC board 14 are arranged up and down in the controller box 32. FIG. 5 is the controller box. 6 is a side cross-sectional view when the flat cross section of (32) is viewed from the bottom, and FIG. 6 is a side cross-sectional view of FIG.

The controller box 32 is installed in the outdoor unit 10 and forms a heat sink 33 on the outer surface, while fixing the rectangular plate-shaped cycle control PC board 14 to the internal fixing module 34. have.

And the motor control PC board 15 of rectangular plate shape larger than the cycle control PC board 14 is fixed to the inner surface of the upper end part of the controller box 32 shown in FIG. 4, and this is located above the PC board 14 for cycle control. I install it. These two PC boards 14 and 15 are electrically connected by the communication cables 27 attached to the connectors 21 and 26 and the lead wires of the power supply lines 29. 5 and 6, reference numeral 25 denotes an SL connector mounting portion.

Therefore, according to this embodiment, various motor control PC boards 15 having different specifications such as air-conditioning capability and power supply voltage, and various cycle control PC boards 14, such as a single type, a multi-air conditioner, a refrigerant heating air conditioner, and the like, are provided. Since it is modular, by combining these two PC boards suitably, various control devices with different specifications can be quickly and easily developed and manufactured.

In addition, since the motor control PC board 15 includes AC100V and AC200V / 230V, an air conditioner having an input power supply voltage of AC100V and AC200V / 230V can be selected by using a motor control PC board 15 suitable for the specification. Since the entire circuit of the control device 11 is redesigned from the beginning, it is not necessary to develop a new PC board so that it can be quickly and easily developed and manufactured.

In addition, since the cycle control PC board 14 includes a multi-air conditioner control, a gas air conditioner control, a petroleum air conditioner control, and the like, by selecting and using a cycle control PC board suitable for each of these air conditioner control, the entire circuit of the control device 11 is used from the beginning. There is no need to redesign and develop a new PC version.

In addition, since power can be supplied from the control circuit power circuit 25 of the motor control PC board 15 to the cycle control PC board, the PC board for cycle control can be modified even if the combination of the two control PC boards 14 and 15 is variously modified. 14, power can be supplied. This eliminates the need to develop a new control circuit power supply circuit 25 even for an air conditioner having different specifications, so that the control device 11 can be developed and manufactured quickly and easily.

In addition, the motor control PC board 15 and the cycle control PC board 14 can exchange data with each of the MCUs 22 and 27. Therefore, for example, the MCU of the cycle control PC board 14 receives data such as the rotation speed of the compressor motor, the outdoor fan motor 6a, or the current value from the MCU 27 mounted on the motor control PC board 15. While transmitting to (22), data such as a target value of the motor rotational speed can be transmitted from the MCU 22 of the cycle control PC board 14 to the MCU 27 of the motor control PC board 15.

And since the motor control PC board 15 and the cycle control PC board 14 are provided in the controller box 32 up and down, the installation space of these two PC boards 14 and 15 can be saved. . Therefore, the controller box 32 can be downsized and the communication cable 28 and the power supply line 29 connecting the two PC boards 14 and 15 can be shortened.

As described above, according to the present invention, various motor control PC boards having different specifications such as air conditioning capability and power supply voltage and various cycle control PC boards having different function types such as single type, multi air conditioner, and refrigerant heating air conditioner are modularized. By properly combining the two PC boards, various control devices with different specifications can be developed quickly and easily.

Claims (7)

In the control device of the air conditioner having a compressor motor control circuit, a fan motor control circuit, a sensor circuit, a valve control circuit, a communication circuit with the indoor unit, These circuits are formed by forming a motor control PC board formed by forming the compressor motor control circuit and the fan motor control circuit on a single printed board, and a communication circuit with the sensor circuit, the valve control circuit, and the indoor unit on a single printed board. A control device for an air conditioner, comprising a PC board for cycle control. The method of claim 1, The motor control PC board is a control device for an air conditioner, characterized in that each of the air conditioning capacity for AC 100V, AC200V / 230V, power supply voltage is configured for different types of air conditioning. The method of claim 1, The cycle control PC board is a control device of an air conditioner, characterized in that each type is configured for different types of functions, such as single type air conditioner control, multi air conditioner control, refrigerant heating air conditioner. The method of claim 1, The motor control PC board has a control circuit power supply circuit mounted on the printed board, and is configured to supply power from the power supply circuit to the motor control PC board and the cycle control PC board. Device. The method of claim 1, The motor control PC board and the cycle control PC board each have a microcontroller unit mounted on each printed board, and are configured to communicate between the microcontroller units. The method of claim 1, The motor control PC board and the cycle control PC board are installed up and down in the controller box, and the two PC boards are electrically connected by lead wires. The method of claim 1, And the cycle control PC board is disposed at a projected position in the opposite direction of the motor control PC board arranged opposite to the cycle control PC board in a controller box.