HVAC CONTROL SYSTEM FOR HOUSEHOLD CENTRAL AIR CONDITIONING

• US 20140324230A1
• Filed: 07/17/2014
• Published: 10/30/2014
• Est. Priority Date: 07/21/2012
• Status: Active Grant

• Current Assignee: Zhongshan Broad-Ocean Motor Company Limited
• Original Assignee: Zhongshan Broad-Ocean Motor Company Limited
• Inventors: ZHAO, Yong, HU, Ge, ZHOU, Yiqiao, LU, Chuping
• Granted Patent: US 10,234,165 B2
• Time in Patent Office: Days
• US Class Current: 700/276
• CPC Class Codes: F24F 11/89 Arrangement or mounting of control or safety devices

Abstract

An HVAC control system for a household central air conditioning, including an HVAC system controller, a centrifugal blower motor, a compressor motor, and an axial fan motor. The HVAC system controller includes an HVAC microprocessor, a sensor, an interface unit for motor control, a power supply part, and a signal processing circuit. The interface unit for motor control includes an inverter unit and a rotor position detection unit. At least one of the centrifugal blower motor, the compressor motor, and the axial fan motor is a permanent magnet synchronous motor in the absence of a motor controller. The HVAC microprocessor drives the permanent magnet synchronous motor in the absence of a motor controller via the inverter unit. The rotor position detection unit sends a rotor position signal of the permanent magnet synchronous motor in the absence of a motor controller to the HVAC microprocessor.

Claims

1. An HVAC control system for a household central air conditioning, comprising:

a) an HVAC system controller, the HVAC system controller comprising an HVAC microprocessor, a sensor, an interface unit for motor control, a power supply part, and a signal processing circuit;

the interface unit for motor control comprising an inverter unit and a rotor position detection unit;

b) a centrifugal blower motor;

c) a compressor motor; and

d) an axial fan motor;

wherein

the power supply part supplies power to each circuit part;

the sensor sends a detected signal to the HVAC microprocessor via the signal processing circuit;

at least one of the centrifugal blower motor, the compressor motor, and the axial fan motor is a permanent magnet synchronous motor in the absence of a motor controller;

the HVAC microprocessor drives the permanent magnet synchronous motor in the absence of a motor controller via the inverter unit; and

the rotor position detection unit sends a rotor position signal of the permanent magnet synchronous motor in the absence of a motor controller to the HVAC microprocessor.

2. The system of claim 1, wherein the centrifugal blower motor is the permanent magnet synchronous motor in the absence of a motor controller;

and the compressor motor and the axial fan motor are AC motors.

3. The system of claim 1, wherein the compressor motor is the permanent magnet synchronous motor in the absence of a motor controller;

and the centrifugal blower motor and the axial fan motor are AC motors.

4. The system of claim 1, wherein the axial fan motor is the permanent magnet synchronous motor in the absence of a motor controller;

and the compressor motor and the centrifugal blower motor are AC motors.

5. The system of claim 1, wherein the centrifugal blower motor and the compressor motor are the permanent magnet synchronous motors in the absence of a motor controller;

and the axial fan motor is an AC motor.

6. The system of claim 1, wherein the centrifugal blower motor and the axial fan motor are the permanent magnet synchronous motors in the absence of a motor controller;

and the compressor motor is an AC motor.

7. The system of claim 1, wherein the compressor motor and the axial fan motor are the permanent magnet synchronous motors in the absence of a motor controller;

and the centrifugal blower motor is an AC motor.

8. The system of claim 1, wherein the centrifugal blower motor, the axial fan motor, and the compressor motor are all permanent magnet synchronous motors in the absence of a motor controller.

9. The system of claim 1, wherein

the HVAC control system is further connected to a gas induced draft fan motor;

and

the gas induced draft fan motor is an AC motor or a permanent magnet synchronous motor in the absence of a motor controller.

10. The system of claim 1, wherein the rotor position detection unit is a phase current detection circuit.

11. The system of claim 1, wherein

the interface unit for motor control further comprises at least one relay and a drive circuit thereof;

and

the HVAC microprocessor is connected to the AC motor via the relay and the drive circuit thereof.

12. An HVAC control system for a household central air conditioning, comprising:

a) a first controller for an indoor unit, the first controller comprising;

a first microprocessor, a sensor, a first interface unit for motor control, a first power supply part, and a signal processing circuit;

the first interface unit for motor control comprising at least one inverter unit and one rotor position detection unit;

b) a second controller for an outdoor unit, the second controller comprising;

a second microprocessor, a second interface unit for motor control, and a second power supply part;

the second interface unit for motor control comprising at least one inverter unit and one rotor position detection unit;

c) a centrifugal blower motor;

d) a compressor motor; and

e) an axial fan motor;

wherein

the first power supply part supplies power to each circuit part of the first controller;

the sensor sends a detected signal to the first microprocessor via the signal processing circuit;

the second power supply part supplies power to each circuit part of the second controller;

the second microprocessor controls the compressor motor and the axial fan motor via the second interface unit for motor control;

the first microprocessor controls the centrifugal blower motor via the first interface unit for motor control;

at least one of the centrifugal blower motor, the compressor motor, and the axial fan motor is a permanent magnet synchronous motor in the absence of a motor controller;

the first microprocessor or the second microprocessor drives the permanent magnet synchronous motor in the absence of a motor controller via the inverter unit; and

the rotor position detection unit sends a rotor position signal of the permanent magnet synchronous motor in the absence of a motor controller to the first microprocessor or the second microprocessor.

13. The system of claim 12, wherein the centrifugal blower motor is the permanent magnet synchronous motor in the absence of a motor controller;

and the compressor motor and the axial fan motor are AC motors.

14. The system of claim 12, wherein the compressor motor is the permanent magnet synchronous motor in the absence of a motor controller;

and the centrifugal blower motor and the axial fan motor are AC motors.

15. The system of claim 12, wherein the axial fan motor is the permanent magnet synchronous motor in the absence of a motor controller;

and the compressor motor and the centrifugal blower motor are AC motors.

16. The system of claim 12, wherein the centrifugal blower motor and the compressor motor are the permanent magnet synchronous motors in the absence of a motor controller;

and the axial fan motor is an AC motor.

17. The system of claim 12, wherein the centrifugal blower motor and the axial fan motor are the permanent magnet synchronous motors in the absence of a motor controller;

and the compressor motor is an AC motor.

18. The system of claim 12, wherein the compressor motor and the axial fan motor are the permanent magnet synchronous motors in the absence of a motor controller;

and the centrifugal blower motor is an AC motor.

19. The system of claim 12, wherein the centrifugal blower motor, the axial fan motor, and the compressor motor are all permanent magnet synchronous motors in the absence of a motor controller.

20. The system of claim 12, wherein

the first microprocessor is further connected to a gas induced draft fan motor;

and

the gas induced draft fan motor is an AC motor or a permanent magnet synchronous motor in the absence of a motor controller.

21. The system of claim 12, wherein the rotor position detection unit is a phase current detection circuit.

22. The system of claim 12, wherein

each of the first interface unit for motor control and the second interface unit for motor control further comprises at least one relay and a drive circuit thereof;

and

the first microprocessor or the second microprocessor is connected to the AC motor via the relay and the drive circuit thereof.