An ecm motor and its applied hvac system

Abstract

The invention discloses an ECM motor. The ECM motor includes a motor and a motor controller. A microprocessor, an inverter circuit, a gear position detection circuit, a memory and a power supply are integrated on a control circuit board. The gear position detection circuit is connected to the There are several gear input lines, and the gear detection circuit includes several current sensing units. The current sensing unit detects the 24V low-voltage AC signals of several gear input lines. When the microprocessor receives 24V from a certain gear input line When the low-voltage AC start signal, the microprocessor needs to delay the start time t1 to start the motor, when the gear input line of this road changes from 24V low-voltage AC to 0V stop signal, the microprocessor needs to delay the shutdown time for a period of time The motor is turned off at t2, the start delay time t1 and the stop delay time t2 are stored in the memory, and the delay time table corresponding to several gears is established through software programming to solve the delayed action of the ECM motor in the HVAC system problem, flexible and convenient.

Description

Technical field: [0001] The invention relates to an ECM motor and an HVAC system for its application. Background technique: [0002] In recent years, with the increasingly fierce competition in the field of electrical appliances, the technical requirements for products have been continuously improved, such as energy saving and environmental protection, high controllability, intelligent controllability, short development cycle, and low noise. As the core component—the motor, it will undoubtedly become the key component to solve the above technical problems. The motors in traditional household central air conditioners generally use single-phase AC motors PSC, single-phase AC motors, low efficiency, relatively energy consumption, and large noise. Controlling intelligence is low. [0003] With the development of motor technology, permanent magnet synchronous motors have appeared. This kind of motor has a motor controller, which uses the motor controller to achieve the purpose o...

AI Technical Summary

Problems solved by technology

[0007] 2. Using the high-voltage signal control of the HVAC system controller to control the gear speed, the advantage of this method is that it can directly replace the PSC motor, and there is no need to re-develop the speed control board, but it cannot realize the continuous fan (fan only) of the HVAC system. Low-speed operation in mode, so power consumption and noise are larger;

[0008] 3. Complex SCI communication speed regulation, this speed regulation method requires complex communication protocols and complex debugging control boards

[0010] The gear speed regulation of the ECM motor controlled by the 24V signal of the thermostat and the low-speed operation in the continuous fan mode (fanonly mode) still need to solve a problem: the start and stop delay problem, because the 24V cooling signal of the THERMOSTAT or When the heating signal or 0V stop signal is sent to the HVAC system controller, the HVAC system controller will delay for a certain period of time before performing the operation. The principle is: when the heat pump cooling process receives the stop signal from the THERMOSTAT After working, there is still a certain cooling capacity, so the fan needs to send out the remaining cooling capacity after the heat pump stops working. Similarly, when the HVAC system controller receives the 24V cooling signal from the THERMOSTAT thermostat, it needs to start the heat pump first. After a period of time, the fan is started to send cold air, so the ECM motor that replaces the original PSC fan motor of the HVAC system must also have a delayed response requirement

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