KR100297996B1 - Controller 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 device of air conditioner {CONTROLLER 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.

Generally, air conditioners include refrigerant air conditioners, cooling air conditioners, heat pump type air conditioners, gas air conditioners, and petroleum air conditioners due to differences in the configuration of the refrigeration cycle. Furthermore, the number of indoor units that can be connected can be divided into single type air conditioners and multi air conditioners, and as the multi air conditioners, there are two room multi-air conditioners with two connectable indoor units, and three room multi-air conditioners with three connectable indoor 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 related art, in the case of developing and manufacturing such various air conditioners, 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 changed from the beginning even when there are few changes. Since it is necessary to redesign 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 the above circumstances, and an object thereof is to provide various motor control PC boards having different air conditioning capacity and power supply voltage specifications, single type air conditioners, multi air conditioners or 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 that can quickly and easily develop and manufacture a control device for various air conditioners having different specifications by modularizing and combining various different cycle control PC plates.

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 cross section of the controller box shown in FIG. 4 is viewed from the bottom. FIG.

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

* Explanation of symbols for the 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

The control apparatus of the air conditioner of the 1st aspect of this invention is a control apparatus of the air conditioner which has a compressor motor control circuit, a control circuit power supply circuit, a sensor circuit, a valve control circuit, and a communication circuit with an indoor unit, At least the said A motor control PC board having a compressor motor control circuit and a control circuit power supply circuit, at least the sensor circuit, a valve control circuit, a cycle control PC board having a communication circuit with an indoor unit, and between the motor control PC board and a cycle control PC board. A communication line provided between the motor control PC plate and the cycle control PC plate for bidirectional data communication and between the motor control PC plate and the cycle control PC plate, and cycle from the power circuit for the control circuit of the motor control PC plate. It is comprised by the power supply line which supplies electric power to a control PC board.

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

The control apparatus of the air conditioner of the 2nd aspect of this invention is characterized in that the PC board for motor control is respectively comprised by the power supply voltage of the air-conditioning capability for AC100V and the air-conditioning capability for AC200V / 230V each different.

According to the present invention, in addition to the effect of the invention of the first aspect, since the PC board for motor control includes AC100V, AC200V / 230V, and the like, for an air conditioner having specifications of AC100V and AC200V / 230V, the motor suitable for the specification By selecting and using the control PC board, there is no need to redesign the entire circuit of the control device from the beginning and develop a new one from the PC board. Therefore, it is possible to develop and manufacture quickly and easily.

The control device of the air conditioner of the third aspect of the present invention is characterized in that the PC board for cycle control is configured at least for each type having different functions for single type air conditioner control, multi air conditioner control, and refrigerant heating air conditioner.

According to the present invention, in addition to the operation of the first or second aspect, 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. This eliminates the need to redesign the entire circuit of the control device from the beginning and develop new ones from the PC board, making it possible to develop and manufacture quickly and easily.

In the controller of the air conditioner of the fourth aspect of the present invention, the motor control PC board includes a fan motor control circuit, and a control circuit power supply circuit is mounted on the printed board. It is characterized by being comprised so that a power may be supplied to a cycle control PC board.

According to the present invention, in addition to the effect of the invention of any one of the first to third aspects, power can be supplied to the motor control PC board and the cycle control PC board from the control circuit power circuit of the motor control PC board. Even if the combination of these two control PC boards is modified in various ways, power can be supplied to the motor control PC board and the cycle control PC board. This eliminates the need to develop new power supply circuits for control circuits even for air conditioners with different specifications, so that control devices can be developed and manufactured quickly and easily.

The controller of the air conditioner of the fifth aspect of the present invention is characterized in that the PC board for motor control and the PC board for cycle control each include a microcontroller unit on each of these printed boards, and the microcontroller units are configured to communicate with each other. Should be.

According to the present invention, in addition to the operation of the invention of any one of the first to fourth aspects, the PC board for motor control and the PC board for cycle control can transmit and receive data between these microcontroller units (hereinafter referred to as MCU). Can be. Therefore, for example, data such as the rotational speed or current value of the compressor motor or the fan motor, etc. are transmitted from the MCU mounted on the PC board for motor control to the MCU of the PC board for cycle control, while the motor from the MCU of the PC board for cycle control is transferred. Data such as the target value of the number of revolutions can be transmitted to the MCU of the PC board for motor control.

The controller of the air conditioner of the sixth aspect of the present invention is characterized in that the PC board for motor control and the PC board for cycle control are provided in the controller box above and below, and these two PC boards are electrically connected by lead wires.

According to the present invention, in addition to the effect of the invention of any one of the first to fifth aspects, a PC board for motor control and a PC board for cycle control are provided up and down in the controller box, thus saving installation space of these two PC boards. Can be planned. For this reason, the controller box can be downsized and the lead wire connecting these two PC boards can be shortened.

The control device of the air conditioner of the seventh aspect of the present invention is characterized in that the cycle control PC board is arranged in the controller box along the arrangement direction of the motor control PC board that is disposed opposite the cycle control PC board.

According to the present invention, in addition to the operation of the invention of any one of the first to fifth aspects, the motor control PC board and the cycle control PC board are provided so as to overlap each other in the controller box. We can save. For this reason, the controller box can be downsized and the lead wire connecting these 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 communicated with 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, a four-way valve 2, an electric expansion valve 5, and an outdoor fan motor that control the rotation speed of the compressor 1 by a signal line shown by a dotted line in the figure. Each of 6a is electrically connected.

The outdoor controller 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 solid arrow in the drawing. Heating operation by circulating the refrigeration cycle in the direction.

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 the electric expansion valve 5. It controls the opening degree, and is also comprised so that data communication can be carried out bidirectionally with the indoor control apparatus not shown by the communication circuit which is not shown in figure.

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 various valves 17 such as a four-way valve 2, an electric expansion valve 5, and an open / close valve not shown in FIG. 2 on one printed circuit board (PC board) 16. Sensor for driving the valve control circuit 18 for switching control, opening degree to opening / closing control, and the sensor 19 such as the external temperature sensor 11 shown in FIG. 2 while reading the temperature detection value. The 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, the 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. The switching angle and the opening degree can be controlled, and the necessary data such as the temperature detection value detected by the sensor 19 can be read 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 also 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 and two pairs of power lines 29. Is electrically connected to each other, bidirectional data communication is possible between the motor control MCU 27 and the cycle control MCU 22, and the motor control PC board is controlled from the power supply circuit 25 for the control circuit of the motor control PC board 15. It is comprised so that electric power may be supplied to 15 and the PC board 14 for cycle control.

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 also the compressor 1 through the compressor motor control circuit 13. The actual rotation speed is read, and the actual rotation speed can be transmitted to the MCU 22 of the cycle control PC board 14.

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

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 15 configured as described above.

For example, the type of motor control PC board 15 is 40/500 for PC class 15A at 1 ° (upper) 100V and 1 ° 200 (V) at input power voltage (V) and air conditioning capacity (class). PC board (15B) for 50 class, PC board (15C) for 40/50 class at 3 ø 200V, PC board (15D) for world wide inverter with specifications of power supply voltage and necessary air conditioning capability have.

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

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, it is not necessary to redesign the entire control circuit every time they are developed, and to develop a new PC board. Can save 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 side by side in the controller box 32, and FIG. 5 is the controller. 6 is a side cross-sectional view when the flat cross section of the box 32 is viewed from the bottom.

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

And as shown in FIG. 4, the rectangular plate-shaped motor control PC board 15 larger than the cycle control PC board 14 is fixed to the inner surface of the upper end part of the controller box 32, and this is compared with the PC board 14 for cycle control. It is installed at the top. These two PC boards 14 and 15 are electrically connected by the communication cables 27 attached to the respective 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. It is not necessary to redesign the whole circuit of the control apparatus 11 from the beginning, and to develop from a PC board newly, and it can develop and manufacture quickly and easily.

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 controls, 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 supply 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 these 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 in 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 these MCUs 22 and 27. Therefore, for example, the MCU 27 of the cycle control PC board 14 receives data such as the rotation speed or the current value of the compressor motor or the outdoor fan motor 6a from the MCU 27 mounted on the motor control PC board 15. 22, the data such as the 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. . For this reason, the controller box 32 can be downsized and the communication cable 28 and the power supply line 29 connecting these two PC boards 14 and 15 can be shortened.

As described above, according to the present invention, since various motor control PC boards having different air conditioning capacity and power supply voltage specifications 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 (6)

In the controller of an air conditioner having a compressor motor control circuit, a power supply circuit for a control circuit, a sensor circuit, a valve control circuit and a communication circuit with an indoor unit, PC board for motor control formed with at least the compressor motor control circuit and the control circuit power supply circuit, A cycle control PC board having at least the sensor circuit, the valve control circuit, and a communication circuit with the indoor unit, A communication line provided between the motor control PC plate and the cycle control PC plate to perform bidirectional data communication between the motor control PC plate and the cycle control PC plate; And a power supply line provided between the motor control PC board and the cycle control PC board to supply electric power from the control circuit power circuit of the motor control PC board to the cycle control PC board. . The method of claim 1, The motor control PC board is a control device for an air conditioner, characterized in that at least the power supply voltage of the air conditioning capacity for AC 100V and the air conditioning capacity for AC200V / 230V is configured for each type. The method of claim 1, The cycle control PC board is a control device for an air conditioner, characterized in that each of the functions of at least a single type air conditioner control, a multi air conditioner control, a refrigerant heating air conditioner is configured for each different type. The method of claim 1, The motor control PC board is a control device of an air conditioner, characterized in that it comprises a fan motor control circuit. 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 motor control PC board and the cycle control PC board each have a microcontroller unit mounted on each of these printed boards, and between these microcontroller units. The control device of the air conditioner, characterized in that configured to communicate via the communication line. The method of claim 1, The cycle control PC board is arranged in the controller box along the arrangement direction of the motor control PC board that is disposed opposite the cycle control PC board.