WO2022047834A1

WO2022047834A1 - Hvac system control unit and hvac system

Info

Publication number: WO2022047834A1
Application number: PCT/CN2020/115753
Authority: WO
Inventors: 胡·戈·盖锐特·詹姆斯; 边文清; 孙海荣
Original assignee: 中山大洋电机股份有限公司
Priority date: 2020-09-07
Filing date: 2020-09-17
Publication date: 2022-03-10
Also published as: CN114151936A

Abstract

An HVAC system control unit and an HVAC system. The HVAC system control unit comprises a first functional module, i.e. a main control module (7) which is used for receiving a control signal of an external temperature controller, and controlling several relay modules (8), wherein the main control module (7) further communicates with an electric motor control unit; and second functional modules, i.e. the relay modules (8), wherein at least one relay is included and is used for controlling the start-up and shutdown of a compressor, a resistance wire or other external devices. Each of the functional modules is provided with an independent metal or plastic shell (1, 1b), the functional modules are connected by means of mutually fitted connection members, such that the power or a control signal is transmitted between the functional modules, and the functional modules are assembled and mounted to form the HVAC system control unit. The production mode is flexible and convenient, and has a high adaptability; and the research and development period can be shortened. The HVAC system control unit is quickly and conveniently produced, and has a relatively high operation reliability; and after-sales maintenance is facilitated, and the maintenance cost is reduced.

Description

A HVAC system control unit and HVAC system

Technical field:

The invention relates to an HVAC system control unit and an HVAC system.

Background technique:

In the field of HVAC system (referred to as HVAC system), HVAC systems of different brands can generally be divided into indoor units and outdoor units, or components equivalent to the functions of outdoor units and indoor units can be installed on the same chassis to make The so-called "packaged unit". Indoor unit and outdoor unit (including the corresponding indoor unit components and outdoor unit components in the integrated air conditioner, the same below) include temperature controllers, centrifugal blower motors, gas induced draft fans, compressors, heating wires, heat pumps and axial fans, etc. The related equipment has a very complicated structure, and you can refer to the US patent USUS5630325, through which a general understanding of the HVAC system can be basically obtained.

As shown in Figure 1 and Figure 2, usually the HVAC system has a dedicated HVAC system controller. The HVAC system controller is also divided into an indoor unit controller and an outdoor unit controller. The indoor unit controller and the outdoor unit controller are respectively Control their respective related components.

The traditional HVAC system controller method is that a manufacturer produces one or several HVAC system controllers, and its HVAC system controllers are all produced by itself. Once a functional component of the controller is damaged, the entire HVAC system controller needs to be replaced. , which brings great inconvenience to the after-sales maintenance market and leads to high maintenance costs.

In addition, the traditional production method of HVAC system controllers has poor compatibility and versatility, that is, all functional components of the HVAC system are concentrated on one or two circuit boards, which loses flexibility, because each customer needs HVAC The system features are different, some are connected to the temperature controller with 24VAC signal, some need to be connected to the temperature controller based on RS485 serial communication, some need to be connected to the temperature controller with 0-10V signal, and some do not have the function of heat pump and dust removal control. , and some need to connect motors with different interface signals, etc., the situation is very complicated, so the compatibility and versatility of the current traditional HVAC system controller is too poor. Therefore, every time HVAC system manufacturers receive the development requirements of customers, they almost have to re-develop, design, and carry out preliminary verification. In view of this, it is necessary to consider a kind of convenient production and assembly, short design and production cycle, and easy maintenance and replacement. HVAC system controller, and this HVAC system controller has a very low maintenance cost in the aftermarket.

Invention content:

One object of the present invention is to provide an HVAC system control unit and an HVAC system, which solve the technical problems of inflexible and convenient production of HVAC system control units in the aftermarket, long research and development time and production time, inconvenient after-sales maintenance and high maintenance costs.

The present invention is achieved through the following technical solutions:

An HVAC system control unit is characterized in that: it comprises:

The first functional module: the main control module, which is used to receive the control signal of the external temperature controller and control several relay modules; the main control module also communicates with the motor control unit;

The second function module: the relay module, which contains at least one relay to control the start and stop of the compressor, resistance wire or other external equipment;

Each of the above-mentioned functional modules has an independent metal or plastic shell, and the functional modules are connected with each other by means of connectors that cooperate with each other, so as to transmit power or control signals between the functional modules.

The above-mentioned main control module includes a main control module microprocessor, a serial communication circuit, a temperature control meter input signal interface circuit and a relay drive circuit, and the external temperature control meter is established with the main control module microprocessor through the temperature control meter input signal interface circuit. For connection and communication, the serial communication circuit is used to communicate between the main control module and the motor control unit. The microprocessor of the main control module controls the operation of the relay in the relay module through the relay drive circuit.

The above-mentioned main control module also includes a pressure switch signal input port, and the compressor refrigerant pressure switch signal enters from the pressure switch signal input port and is sent to the main control module microprocessor.

The above-mentioned main control module also includes a number of analog signal input ports, and the temperature detection circuit that detects the coil or air temperature inputs analog signals. These analog signals are processed by the analog signal input port and processed by the A/D circuit. processor.

The above-mentioned main control module can obtain power from the motor control unit, or a power supply circuit can be separately set in the main control module, and the power supply circuit can supply power to each part of the circuit in the main control module.

The above-mentioned HVAC system control unit also includes a third functional module: the outdoor unit defrosting module, which is used to defrost the outdoor unit coil in the heat pump mode. The outdoor unit defrosting module also has an independent metal or plastic shell, and the outdoor unit The defrosting module and other functional modules are connected through mutually matched connectors, which are used to transmit power or control signals between the functional modules.

The above-mentioned outdoor unit defrosting module includes an outdoor coil temperature detection circuit, a defrost control microprocessor, a relay drive circuit and a defrost relay. The temperature of the outdoor coil is detected by the outdoor coil temperature detection circuit and then sent to the defrost control microcomputer. The processor, the defrosting control microprocessor uses the relay drive circuit to control the defrosting relay, and the defrosting relay controls the four-way solenoid valve in the refrigerant circulation circuit of the HVAC system.

The above-mentioned connection between the functional modules and the functional modules through the connecting pieces that cooperate with each other means that each functional module can be flexibly placed in different positions by adopting a flexible cable connection.

The above-mentioned connection between the functional modules and the functional modules through the inter-matching connectors means that the male plug-in and the female plug-in are used to plug each other into each other, so that the functional modules can be brought together and space is saved.

All the above-mentioned functional modules are arranged in a line, and then installed on the electrical installation guide rails. The functional modules are connected by flexible cables. The flexible cable connection allows the user's functional modules to be arranged vertically or horizontally or scattered. Install in different locations.

All the above functional modules are fixed on a base. The base is designed as a purely mechanical installation base. The functional modules are connected by flexible cables. The flexible cable connection allows the user's functional modules to be arranged vertically. Or horizontally arranged or scattered in different positions.

All the above-mentioned functional modules are fixed on a base, and a bus interface is added to the base, so that each functional module can supply power to each other or transmit control signals.

The above-mentioned several relay modules refer to one or more relay modules. When multiple relay modules are made into indoor relay modules and outdoor relay modules according to the functions of the indoor and outdoor units, the relay modules do not have microprocessors. And for the drive circuit, only one or more relays are assembled according to the number of control objects.

An HVAC system, comprising an HVAC system control unit and a motor control unit, is characterized in that: the HVAC system control unit is the above-mentioned HVAC system control unit.

The motor control unit described above includes:

The fourth functional module: that is, the power module, which is connected to the mains, and outputs the corresponding VDC power supply to supply power to other functional modules;

The fifth functional module: the motor control module, a motor control module controls a motor body, including a microprocessor and IGBT inverter components, accepts VDC power supply and external input control signals, and outputs power to the motor to achieve Speed or torque or air volume control;

The sixth functional module: the I/O module, used for signal transmission between the HVAC system control unit or peripheral equipment and the motor control module; the I/O module at least includes a serial communication module;

Each functional module in the above-mentioned motor control unit has an independent metal or plastic casing and a circuit board located in the casing. Power or control signals are transmitted between them.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the inter-cooperating connectors means that the flexible cable connection is adopted to facilitate the flexible placement of the functional modules in different positions.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the inter-matching connectors means that the male plug-in and the female plug-in are used for plugging, so that the functional modules can be brought together and space is saved.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the inter-matching connectors means that all functional modules are lined up in a row, and then installed on the electrical installation guide rails. The functional modules are connected, and the flexible cable connection allows the user's functional modules to be arranged vertically or horizontally or installed in different positions.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the inter-matching connectors means that all functional modules are fixed on a base, and the base is designed as a purely mechanical installation base. The connecting side connects each functional module, and the flexible cable connection allows the user's various functional modules to be vertically arranged or horizontally arranged or installed in different positions.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the inter-matching connectors means that all functional modules are fixed on a base, and a bus interface is added to the base to allow each functional module to supply power or transmit power to each other. control signal.

Compared with the prior art, the present invention has the following advantages:

1) The present invention subdivides the HVAC system control unit into a plurality of functional modules according to functions, and these functions include the first functional module: the main control module, which is used to receive the control signal of the external thermometer and control several relay modules; The main control module also communicates with the motor control unit; the second functional module: the relay module, which contains at least one relay to control the start and stop of the compressor, the resistance wire or other external equipment; the above-mentioned functional modules have independent Metal or plastic shell, the functional modules are connected with the functional modules through matching connectors, which are used to transmit power or control signals between the functional modules. The production method of this combined module is flexible, convenient and adaptable. Shorten the research and development cycle, fast and convenient production, when after-sales maintenance, if a functional module is found to be faulty, it can be easily replaced, reducing maintenance costs, and maintenance is convenient and fast.

2) Other advantages of the present invention are detailed in the Examples section.

Description of drawings:

Fig. 1 is the layout block diagram of the HVAC HVAC system in the prior art;

Fig. 2 is the structural schematic diagram of the HVAC HVAC system in the prior art;

3 is an application structure diagram of the HVAC system control unit according to the first embodiment of the present invention;

Fig. 4 is the concrete circuit block diagram corresponding to the HVAC system control unit of Fig. 3;

Fig. 5 is another application structure diagram of the HVAC system control unit according to the first embodiment of the present invention;

Fig. 6 is the concrete circuit block diagram corresponding to the HVAC system control unit of Fig. 5;

Fig. 7 is the circuit block diagram of the main control module of the first embodiment of the present invention;

Fig. 8 is a specific circuit diagram corresponding to a temperature controller input signal interface circuit in Fig. 7;

9 is a circuit block diagram of an outdoor defrosting module according to Embodiment 1 of the present invention;

10 is a perspective view of a functional module according to Embodiment 1 of the present invention;

11 is a perspective view of another angle of the functional module according to the first embodiment of the present invention;

12 is an exploded view of a functional module of Embodiment 1 of the present invention;

13 is an angular perspective view of the assembled motor controller of the first embodiment of the present invention after assembly;

Fig. 14 is another perspective view of the assembled motor controller after assembly of a first embodiment of the present invention;

15 is a perspective view of the electrical appliance installation guide rail according to Embodiment 1 of the present invention;

16 is a perspective view of a functional module of Embodiment 2 of the present invention;

FIG. 17 is an exploded view of a functional module of Embodiment 2 of the present invention;

18 is a perspective view of the base of the second embodiment of the present invention;

Figure 19 is an exploded view of the base of the second embodiment of the present invention;

Fig. 20 is an angle assembly diagram of the combined motor controller of the second embodiment of the present invention;

21 is a perspective view of a motor body according to Embodiment 3 of the present invention;

22 is a structural cross-sectional view of a motor body according to Embodiment 3 of the present invention;

Fig. 23 is a circuit block diagram of the motor control unit according to the third embodiment of the present invention;

FIG. 24 is a perspective view of Embodiment 3 of the present invention.

detailed description:

The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

Example 1:

As shown in Figures 3 and 4, an application of the HVAC system control unit of the present invention is an application of an HVAC system with a heat pump function and an outdoor defrosting function. The HVAC system uses a traditional thermostat (THERMOSTAT) + heat pump + air heat exchanger (Air Handler) mode, the HVAC system control unit includes a main control module, an indoor relay module, an outdoor relay module, an outdoor unit defrosting module and an electronic control unit communication module. in:

The main control module is responsible for receiving the cooling signal (including high-grade, low-grade or single-grade), heating signal (including high-grade, low-grade or single-grade) or continuous fan signal from the thermostat, and then transmits it to the electronic control unit communication module.

The indoor relay module is used to control the resistance wire and turn on the corresponding contact after receiving the signal from the thermostat. Some resistance wires have high and low gears, so two relays are required.

The outdoor relay module mainly controls the power supply of the compressor, including the one-speed and two-speed compressors, the solenoid valve for gear selection of the two-speed compressor, and the optional crankcase heater (Crankcase Heater).

As shown in Figure 9, the outdoor unit defrost module includes an outdoor coil temperature detection circuit, a defrost control microprocessor (which can be a single-chip MCU), a relay drive circuit and a defrost relay. The temperature of the outdoor coil is determined by the temperature of the outdoor coil. The detection circuit detects and then sends it to the defrosting control microprocessor. The defrosting control microprocessor uses the relay drive circuit to control the defrosting relay, and the defrosting relay controls the four-way solenoid valve in the refrigerant circulation circuit of the HVAC system. The defrost control microprocessor can configure the duration of the defrost mode, the conditions for entering and exiting the defrost mode, and the temperature of the outdoor coil is detected by the temperature detection circuit, which is used when the outdoor unit coil temperature reaches the set value. After receiving a switch signal, it can also support thermocouples, so that the defrost control microprocessor can instantly determine the coil temperature, and enter the defrost mode at the appropriate time. The defrost relay controls the four-way solenoid valve in the refrigerant circulation circuit of the HVAC system. Execute the defrosting action.

As shown in Figure 5 and Figure 6, another application mode of the HVAC system control unit of the present invention is applied to the application of the HVAC system without the heat pump and outdoor defrosting functions. The HVAC system adopts a serial communication type temperature controller. +AC type air conditioner (non-heat pump type) power control + air heat exchanger (Air Handler) structure, HVAC system control unit includes main control module, indoor relay module, outdoor relay module and electronic control unit communication module. Among them: the main control module is responsible for accepting and replying to the calling cooling signal (including high-grade, low-grade or single-grade), heating signal (including high-grade, low-grade or single-grade) or continuous fan signal from the thermostat, or other control supported by the communication protocol The signal is then transmitted to the electronic control unit communication module through its own sub-communication module. The indoor relay module is used to control the resistance wire and turn on the corresponding contact after receiving the signal from the thermostat. Some resistance wires have high and low gears, so two relays are required. The outdoor relay module mainly controls the power supply of the compressor, including the one-speed and two-speed compressors, the solenoid valve for gear selection of the two-speed compressor, and the optional crankcase heater (Crankcase Heater). At this time, when the outdoor unit is controlled by AC power (that is, AC Only), that is, only a refrigeration device, only the outdoor relay module is required to control the on-off motor casing, and no other outdoor unit control boards are required.

The indoor relay module and the outdoor relay module are only divided according to the indoor and outdoor control objects. In fact, the indoor relay module and the outdoor relay module can be combined into one relay module. The relay module contains several relays, and the relay module does not have microprocessors. For the controller and drive circuit, only one or more relays are assembled according to the number of control objects.

As shown in Figure 7, the main control module includes a temperature control meter input signal interface circuit, a main control module microprocessor (which can be a single-chip MCU) and a plurality of relay drive circuits. There are N relays in Figure 7, which are JK1 and JK2 respectively. ...JKN, used to control different electrical components or equipment, such as compressors, heating wires, heaters, etc., several relays are assembled to form a relay module. At present, there are three most common thermostats on the market, one is a traditional thermostat that outputs 24VAC signals, including the common Y1/Y2/W1/W2/G/RVS signal output; the other is a serial port based on RS485 Communication thermometers; the third type is: thermometers that support 0-10VDC or 4-20mA control signals; based on these 3 types of thermostats, the main control module can be made into 3 types of parts to adapt to the Thermometers, thermometers based on RS485 serial communication, and thermometers supporting 0-10VDC or 4-20mA control signals are convenient for combined installation and solve the technical problems of rapid production, flexible installation and maintenance; Figure 8 is the main control module The circuit diagram of the input signal interface circuit of the middle temperature controller, the corresponding 24VAC signal temperature controller adopts photoelectric coupling chips U1, U2, U3, U4, U5, and converts the multi-channel 24VAC signal of the temperature controller into a DC signal and inputs it to the It is processed in the microprocessor of the main control module. In the same way, for thermometers that output analog signals such as 0-10VDC or 4-20mA, a corresponding main control module that accepts 0-10VDC or 4-20mA can also be made. As for the serial communication based on RS485, it can also be In the main control module, a specially corresponding interface circuit for the input signal of the temperature controller is designed, which are all in the prior art and will not be described in detail here.

An HVAC system control unit is characterized in that: it comprises:

The production method of this combined module is flexible, convenient and adaptable, which can shorten the research and development cycle, and the production is fast and convenient.

The above-mentioned main control module includes a main control module microprocessor, a serial communication circuit, a temperature control meter input signal interface circuit and a relay drive circuit, and the external temperature control meter is established with the main control module microprocessor through the temperature control meter input signal interface circuit. For connection and communication, the serial communication circuit is used to communicate between the main control module and the motor control unit. The microprocessor of the main control module controls the operation of the relay in the relay module through the relay drive circuit. The main control module also has several ports for switch signal input and analog signal input. The switch signal ports (port 1 and port 2 in Figure 7) can be connected to a pressure switch used to monitor the refrigerant in the compressor, generally including a high pressure switch (HPS) and a low pressure switch (LPS). The analog signal ports (port 3, port 4 and port 5 in Figure 7) can be connected to a temperature control detection device (Thermistor) that detects the coil or air temperature, so that the main control module has some error reporting or additional control logic. The firmware of the main control module can enable or disable the Anti Short Cycle function that prevents the compressor from starting frequently through the communication module. The present invention such as "compressor refrigerant pressure switch signal", "temperature detection circuit input analog signal for detecting coil or air temperature", "Crankcase Heater", "Anti Short Cycle" are all optional functions, In practical applications, if the user does not provide/do not need these signals and controlled components, the HVAC system control unit involved in this patent can still run normally, and the driver can default to these functions as "disabled", which can be done through the supporting PC program or Bluetooth App to configure and enable.

The above-mentioned connection between the functional modules and the functional modules through the connecting pieces that cooperate with each other means that the flexible cable connection can be adopted, so that the functional modules can be flexibly placed in different positions.

The above-mentioned connection between the functional modules and the functional modules through the inter-matching connectors means that the male plug-in and the female plug-in can also be used for plugging, so that the functional modules can be brought together and space is saved.

All the above functional modules are arranged in a line, and then installed on the electrical installation guide rails. The functional modules are connected by flexible cables. The flexible cable connection allows the user's various functional modules to be arranged vertically or horizontally or scattered differently. location to install.

As shown in Figures 10 to 15, each functional module has an independent metal or plastic housing 1 and a circuit board 2 or a relay located in the housing 1. When the functional module is a relay module, the housing 1 is a relay; when the functional module is a relay It is the other functional modules. Inside the shell 1 is the circuit board 2; , Each functional module has an independent metal or plastic shell 1, which can effectively protect the parts, avoid the risk of contact between the functional modules, effectively resist electromagnetic interference, and ensure the reliability of the product. In FIG. 13 , the HVAC system control unit of the present invention is composed of a main control module 7 , a relay module 8 and an outdoor unit defrosting module 10 . A card slot is formed between them, and the electrical installation guide rail 6 is used to pass through the card slot between the two card blocks 11 to combine multiple functional modules side by side. Several mounting holes 62 are provided, and the electrical installation guide rail 6 can be locked on the load by using screws passing through the mounting holes 62 . Each different functional module is a cuboid shell with the same height and depth. The width of the shell can be different. Choose to line up all the functional modules, leaving no gap between the two adjacent modules, and then install them on the electrical installation rail 6 It is convenient and flexible to install, and can be quickly produced and assembled. In Figure 11, only 2 plug-in ports 3 are shown in the circuit board 2, but for the main control module, there are usually more than 3 plug-in ports 3, because it has many external connections, and will not be described here. The number of 3 depends on the requirements of the functional modules.

Embodiment 2:

As shown in FIGS. 16 to 20 , the present embodiment improves the installation and connection methods of each functional module on the basis of Embodiment 1: Specifically, all functional modules of the present invention are fixed on a base 100, and the base is designed as A purely mechanical mounting base can also add a bus interface to the purely mechanical mounting base, allowing each functional module to supply power to each other or transmit control signals.

In Figures 16 and 17, each functional module such as the main control module and the outdoor unit defrosting module has an independent metal or plastic casing 1b and a first circuit board 2b located inside the casing, and the first circuit board 2b extends out of several male connections The plug port 3b, the male plug port 3b protrudes from the housing 1b for a distance, so that the male plug port 3b and the female plug port 103 on the base 100 are electrically connected together. Of course, the relay module has an independent metal or plastic casing 1b and a relay inside the casing 1b, and the input and output terminals of the relay are connected to the male plug port 3b through lead wires to form a plug function.

18 and 19, the base 100 includes an upper shell 101, a lower shell 102 and a second circuit board 104. The second circuit board 104 is installed in the cavity enclosed by the upper shell 101 and the lower shell 102. The second circuit board 104 is provided with a number of bus communication unit circuits and power supply lines, the second circuit board 104 extends out a number of female sockets 103, the base 100 is provided with multiple rows of female sockets 103, each row has two spaced female sockets 103 .

As shown in FIG. 20 , two male sockets 3b extending from the first circuit board 2b are electrically connected to the two female sockets 103 in the same row on the base 100 for power supply connection and signal transmission connection respectively. Of course, the first circuit board 2b also has other plug-in ports, which are not shown in the figure, so as to facilitate the input and output of external AC AC or peripheral control signals. In FIG. 20, the modules from left to right are the main control module 7, the relay module 8, and the outdoor unit defrosting module 10, respectively. The main control module 7, the relay module 8, and the outdoor unit defrosting module 10 are inserted into the base. The HVAC system control unit is formed on 100.

The HVAC system control unit of the present invention does not distinguish between indoor and outdoor, and can be integrated or distributed during installation. The description of each functional module not only takes into account the needs of OEM mass production, but also can be applied to the aftermarket, using different part numbers represent.

The first functional module, that is, the main control module, provides main control modules with different part numbers according to the matching with the signals of general thermometers in the market, such as:

Part No. F101: Covers thermometers suitable for 24VAC signals on the market;

Part No. F102: Covers thermometers suitable for RS485-based serial communication on the market; at this time, the firmware of the main control module must support the communication protocol used by the thermometer.

Part No. F103: Covers thermometers suitable for 0-10V signals on the market;

Part No. F104: Covers thermometers suitable for 4-20mA signals on the market;

The second function module: the relay module, which can be divided into different part numbers according to the number of control objects.

The fourth functional module: outdoor unit defrosting module, basically one part can meet the needs.

Through the above functional modules, users can choose flexibly according to their own needs.

Embodiment three:

As shown in FIG. 3 and FIG. 4 , an HVAC system includes an HVAC system control unit and a motor control unit, characterized in that: the HVAC system control unit is the HVAC system control unit described in Embodiment 1 or Embodiment 2 . Both the indoor unit fan motor body and the outdoor unit fan motor body described in the figure do not have a motor controller. As shown in Figures 21 and 22, the motor body 200 includes a motor casing 201, a stator assembly 202, a rotor Assembly 203 with bearings and shaft. The motor control unit is equivalent to the current motor controller, but the motor control unit is a combined structure.

As shown in Figure 23, the motor control unit includes:

The fifth functional module: the motor control module, a motor control module controls a motor body, including a microprocessor and IGBT inverter components, accepts VDC DC power supply and external input control signals, and outputs power to the motor to achieve Speed or torque or air volume control;

The sixth functional module: the I/O module, which is used for signal transmission between the HVAC system control unit or peripheral equipment and the motor control module; the I/O module includes at least one serial communication module to communicate with the HVAC system controller. The main control module establishes connection communication.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the interconnecting connectors means that the flexible cable connection is used to facilitate the flexible placement of the functional modules in different positions. Please refer to Figures 10 to 15. manufacturing and installation method.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the inter-matching connectors means that the male plug-in and the female plug-in are plugged together to facilitate the closeness of the functional modules and save space. Please refer to Figure 10. To the manufacturing installation of Figure 15.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the inter-matching connectors means that all functional modules are lined up in a row, and then installed on the electrical installation guide rails. The functional modules are connected, and the flexible cable connection allows the user's functional modules to be vertically arranged or horizontally arranged or installed in different positions. Please refer to the manufacturing and installation methods in Figures 10 to 15.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the inter-matching connectors means that all functional modules are fixed on a base, and the base is designed as a purely mechanical installation base. The connection side connects each functional module, and the flexible cable connection allows the user's various functional modules to be vertically arranged or horizontally arranged or installed in different positions. Please refer to Figure 16 to Figure 20 for the manufacturing and installation methods.

The above-mentioned connection between the functional modules in the motor control unit and the functional modules through the inter-matching connectors means that all functional modules are fixed on a base, and a bus interface is added to the base to allow each functional module to supply power or transmit power to each other. For the control signal, please refer to the manufacturing and installation methods in FIGS. 16 to 20 .

The production method of this combined module is flexible, convenient and adaptable, which can shorten the research and development cycle, produce fast and convenient, and have higher operational reliability. , the maintenance is convenient and quick.

The above-mentioned I/O modules are further divided into multiple types according to different functions, including:

For the serial communication module based on RS485, the motor control module must have corresponding drivers to be compatible with different communication protocols;

The Bluetooth wireless communication module allows users to wirelessly communicate with the motor control module through a mobile app or PC for configuration and diagnosis;

The pulse output module can monitor a certain parameter of the motor by the main control board of the customer by outputting the pulse.

The Ethernet LAN module supports common TCP/IP protocols, and can connect the motor control module to the building network control, or remotely control and monitor the parameter status of the motor through the Internet.

Human-machine interface HMI function module, according to the market division, provides monochrome basic HMI and advanced high-definition color screen, allowing users to directly control the motor, control the speed/torque/air volume of the motor in real time, or perform configuration and diagnosis, Can even be used for lab tests.

The encoder switch module, the encoder switch module and the motor control module are connected through connectors, and a row of several DipSwitches are provided for users to change the parameters of the motor in real time.

All the above functional modules are fixed on a base, and a second circuit board is arranged in the base to transmit power or control signals between the functional modules.

The combined motor control unit of the present invention does not distinguish between the indoor unit motor and the outdoor unit motor, as long as the voltage and power are suitable, the motor bodies of the indoor unit and the outdoor unit can use the same functional module part number. The following description of each functional module not only takes into account the needs of OEM mass production, but also applies to the aftermarket.

The fourth functional module, namely the power module, is composed of surge protection circuit + rectifier filter circuit + DC-DC step-down circuit, which accepts mains power and outputs corresponding DC power. My design is to provide power modules with different part numbers according to different voltages and motor powers, such as:

Part number A101: 120/230/277VAC tri-voltage/60Hz/1Ph, covering motors suitable for 1/4HP and below;

Part number A102: 120/230/277VAC tri-voltage/60Hz/1Ph, covering 1/3HP and 1/2HP motors;

Part number A101: 120/230/277VAC tri-voltage/60Hz/1Ph, covering 3/4HP and 1HP motors;

Part number A104: 460VAC/60Hz/3Ph, covering motors from 1.2HP to 2HP;

Part number A105: 460VAC/60Hz/3Ph, covering motors from 2.3HP to 3.5HP;

Part number A105: 460VAC/60Hz/3Ph, covering 5HP motors;

...

Part number A10N: 575VAC/60Hz3Ph, covering 5HP motors;

The power modules of other voltage segments and power segments are not written out one by one. In short, in order to meet the needs of different voltages and powers, the power supply modules should have a dozen or more part numbers. But the advantage is that once all these part numbers are determined, customers can choose and match flexibly, and a 1HP power module can supply power to two 1/2HP motor bodies at the same time.

The fifth functional module: the motor control module, a motor control module module controls the motor body of a motor, including microprocessor MCU + IGBT inverter components (inverter circuit components) + cooling device, accepts VDC power supply and control Signal, and output UVW three-phase (or multi-phase) power supply to the motor body to achieve speed, torque or air volume control. If the Hall element is required to detect the rotor position signal, the motor control module also needs to have a Hall signal input port.

The motor control module should also have an update port to ensure compatibility with different input and output modules, fix bugs, and add functions in the future. As well as a port to connect to a PC, which is used to configure various parameters of the motor through programming. Similarly, the part number of this function module can be as follows:

Part No. B101: Motor body for DM2 motors of 1/4HP and below

Part No. B102: Motor body for DM3 motors 1/4HP and below

Part No. B103: Motor body for 1/3HP and 1/2HP DM2 motors

Part No. B104: Motor body for 1/3HP and 1/2HP DM3 motors

...

Part No. B120: Motor body for 5HP DM2 motor

Part No. B131: Motor body for 5HP DM3 motor

In the sixth functional module, the serial communication module based on RS485, the motor control module must have corresponding drivers to be compatible with different communication protocols such as Modbus and ClimateTalk.

For the serial communication module based on RS485, the motor control module must have corresponding drivers to be compatible with different communication protocols, and its part number is C104;

The Bluetooth wireless communication module allows users to wirelessly communicate with the motor control module through the mobile phone App or PC for configuration and diagnosis, and its part number is C105;

The pulse output module can monitor a certain parameter of the motor by outputting pulses for the main control board of the customer, and its part number is C106.

Ethernet LAN module, supports common TCP/IP protocol, can connect the motor control module to the building network control, or monitor the parameter status of the motor remotely through the Internet. The Ethernet LAN module establishes connection and communication with the microprocessor in the motor control module , its part number is C107.

Human-machine interface HMI function module, according to the market division, provides monochrome basic HMI and advanced high-definition color screen, allowing users to directly control the motor, control the speed/torque/air volume of the motor in real time, or perform configuration and diagnosis, It can even be used for laboratory testing, the HMI function module of the human-machine interface establishes connection and communication with the motor control module, and its part number is C108.

That is, the code disc switch module, the code disc switch module and the motor control module are connected through connectors, and a row of several DipSwitches are provided for users to change the parameters of the motor in real time. The code disc switch module establishes connection and communication with the motor control module. Its part number for C109.

Through the above functional modules, users can flexibly choose according to their own needs. Here are a few examples:

Example 1: User A, a commercial air conditioner, uses a 24VAC traditional temperature controller, and needs to control one 3HP indoor unit motor and two 1/3HP outdoor unit motors at the same time. The outdoor unit part is a single-speed compressor AC type, and the indoor unit part It is the Air Handler configuration resistance wire. The solution is as follows:

One HVAC master control module

A relay module controls the resistance wire of the indoor unit

A relay module controls the compressor of the outdoor unit

One power module is enough to power three motors, (two or three smaller power modules can also be selected), select the power module with a specific part number;

A 3HP motor control module, select the motor control module corresponding to a specific part number;

Two 1/3HP motor control modules, select two corresponding motor control modules with specific part numbers;

Three serial communication input modules (I/O modules);

It can be assembled and produced by selecting different modules. There is no need for R&D and design in the early stage, the production cycle is short, R&D costs are saved, and after-sales maintenance is convenient.

Example 2: User B, a household air conditioner, uses a serial communication type temperature controller, the outdoor unit is a two-speed compressor, has a heat pump function and is equipped with a crankcase heater, and the indoor unit is an Air Handler with dual gears Resistance wire. Need to control a 1/2HP indoor unit motor and a 1/4HP outdoor unit motor at the same time, the solution:

One HVAC main control module;

A relay module controls the resistance wire of the indoor unit (including two relays for the control of the dual-position resistance wire)

A relay module controls the compressor of the outdoor unit (including a relay to control the line voltage of the compressor and a relay to control the high and low gear switching of the compressor)

A relay module controls the Crankcase Heater of the outdoor unit compressor.

One power module is enough to power two motors

One 1/2HP motor control module

One 1/4HP motor control module

Two serial communication input modules (I/O modules)

It can be seen from the above cases that the previous centralized controller is divided into various functional modules, allowing users to follow their needs and flexibly choose different parts. Compared with the previous "big and comprehensive" design, it reduces the number of OEM users. cost, and replace which module is damaged, which also saves costs for the aftermarket. Moreover, these functional modules can be installed on a base to form a "centralized control" in the actual sense, and can also be installed in different positions, which also provides customers with convenience in installation.

By assembling the above functional modules on a base 100, each functional module performs power supply connection and data transmission through the data bus and power bus on the second circuit board of the base 100, thereby forming an integral motor control unit.

As shown in FIG. 24 , in the present invention, all functional modules of the HVAC system control unit and the motor control unit can be combined and installed on one base 100 , and each functional module is powered by the data bus and the power bus on the second circuit board of the base 100 connection and data transfer, thus forming a whole. From left to right in the figure, the main control module 7, the relay module 8, the outdoor unit defrosting module 10, the power supply module 11, the motor control module 12, the serial communication input module 13 and the Bluetooth wireless communication module (for the motor and external devices) communication), so that the base 100 is shared, space and cost are saved, and the structure is more compact. In addition, the main control module 7 , the relay module 8 , and the outdoor unit defrosting module 10 can all obtain the required power supply from the power supply module 11 .

The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations and simplifications made without departing from the spirit and principle of the present invention are equivalent to The replacement modes are all included in the protection scope of the present invention.

Claims

An HVAC system control unit is characterized in that: it comprises:

The first functional module: the main control module, which is used to receive the control signal of the external temperature controller and control several relay modules; the main control module also communicates with the motor control unit;

The second function module: the relay module, which contains at least one relay to control the start and stop of the compressor, resistance wire or other external equipment;

Each of the above-mentioned functional modules has an independent metal or plastic shell, and the functional modules are connected with each other by means of connectors that cooperate with each other, so as to transmit power or control signals between the functional modules.
The HVAC system control unit according to claim 1, wherein the main control module comprises a main control module microprocessor, a serial communication circuit, a temperature controller input signal interface circuit and a relay drive circuit, and the external temperature controller The input signal interface circuit of the control meter establishes connection and communication with the microprocessor of the main control module. The serial communication circuit is used to communicate between the main control module and the motor control unit. The microprocessor of the main control module controls the relay module through the relay drive circuit. The relay inside works.
The HVAC system control unit according to claim 2, wherein the main control module further comprises a pressure switch signal input port, and the compressor refrigerant pressure switch signal enters from the pressure switch signal input port and is sent to the main control module microprocessor.
The HVAC system control unit according to claim 2, wherein the main control module further comprises a plurality of analog signal input ports, and the temperature detection circuit for detecting the coil or air temperature inputs analog signals, and these analog signals pass through the analog signal input ports and After being processed by the A/D conversion circuit, it is input to the microprocessor of the main control module.
The HVAC system control unit according to claim 2, wherein the main control module can obtain power from the motor control unit, or a power supply circuit is separately set in the main control module, and the power supply circuit is each part of the circuit in the main control module. powered by.
The HVAC system control unit according to claim 1 or 2 or 3 or 4 or 5, characterized in that: it further comprises a third functional module: namely, an outdoor unit defrosting module, which is used to provide the outdoor unit coil in the heat pump mode. For defrosting, the outdoor unit defrosting module also has an independent metal or plastic shell, and the outdoor unit defrosting module and other functional modules are connected through mutually matched connectors to transmit power or control signals between the functional modules.
The HVAC system control unit according to claim 6, wherein the outdoor unit defrosting module includes an outdoor coil temperature detection circuit, a defrosting control microprocessor, a relay driving circuit and a defrosting relay, and the temperature of the outdoor coil is determined by The outdoor coil temperature detection circuit detects and sends it to the defrost control microprocessor. The defrost control microprocessor uses the relay drive circuit to control the defrost relay, and the defrost relay controls the four-way solenoid valve in the refrigerant circulation loop of the HVAC system.
The HVAC system control unit according to any one of claims 1 to 5, characterized in that: the connection between the functional modules and the functional modules through the interconnected connectors means that the flexible cable connection is adopted to facilitate the flexible connection of each functional module. placed in different locations.
The HVAC system control unit according to any one of claims 1 to 5, characterized in that: the connection between the functional modules and the functional modules by means of mutually matched connectors means that the male plug-in and the female plug-in are plugged together to facilitate each function. Modules are close together to save space.
The HVAC system control unit according to any one of claims 1 to 5, characterized in that: all functional modules are arranged in a line, and then installed on the electrical installation guide rail, and each functional module is connected by a flexible cable connection , the flexible cable connection allows the user's various functional modules to be arranged vertically or horizontally or installed in different positions.
The HVAC system control unit according to any one of claims 1 to 5, characterized in that: all functional modules are fixed on a base, and the base is designed as a purely mechanical mounting base, which is connected by flexible cables. Each functional module is connected, and the flexible cable connection allows the user's various functional modules to be arranged vertically or horizontally or installed in different positions.
The HVAC system control unit according to any one of claims 1 to 5, wherein all functional modules are fixed on a base, and a bus interface is added to the base to allow each functional module to supply power to each other or transmit control signals.
The HVAC system control unit according to claim 1 or 2 or 3 or 4 or 5, characterized in that: a plurality of relay modules means that one or more relay modules can be formed. The function of the machine is made into an indoor relay module and an outdoor relay module. The relay module does not have a microprocessor and a driving circuit, but only integrates one or more relays according to the number of control objects.
An HVAC system, comprising an HVAC system control unit and a motor control unit, characterized in that: the HVAC system control unit is the HVAC system control unit described in any one of claims 1 to 13.
The HVAC system of claim 14, wherein the motor control unit comprises:

The fourth functional module: that is, the power module, which is connected to the mains, and outputs the corresponding VDC power supply to supply power to other functional modules;

The fifth functional module: the motor control module, a motor control module controls a motor body, including a microprocessor and IGBT inverter components, accepts VDC power supply and external input control signals, and outputs power to the motor to achieve Speed or torque or air volume control;

The sixth functional module: the I/O module, used for signal transmission between the HVAC system control unit or peripheral equipment and the motor control module; the I/O module at least includes a serial communication module;

Each functional module in the above-mentioned motor control unit has an independent metal or plastic casing and a circuit board located in the casing. Power or control signals are transmitted between them.
The HVAC system according to claim 15, wherein the connection between the functional modules and the functional modules in the motor control unit by means of mutually matched connectors means that a flexible cable connection is used to facilitate the flexibility of each functional module. placed in different locations.
The HVAC system according to claim 15, wherein: the functional modules in the motor control unit are connected with the functional modules by means of mutually matched connectors, which means that the male plug-in and the female plug-in are plugged to facilitate each other. The functional modules are close together to save space.
The HVAC system according to claim 15, wherein the connection between the functional modules and the functional modules in the motor control unit by means of mutually matched connectors means that all functional modules are lined up and then installed in the electrical appliance. On the installation rail, the functional modules are connected by flexible cables. The flexible cable connection allows the user's functional modules to be arranged vertically or horizontally or installed in different positions.
The HVAC system according to claim 15, characterized in that: the functional modules in the motor control unit are connected with the functional modules through mutually matched connectors, which means that all functional modules are fixed on a base, and the base is designed It becomes a purely mechanical installation base, and the functional modules are connected by flexible cables. The flexible cable connection allows the user's functional modules to be arranged vertically or horizontally or installed in different positions.
The HVAC system according to claim 15, characterized in that: the functional modules in the motor control unit are connected with the functional modules through mutually matched connectors, which means that all functional modules are fixed on a base, and the base increases The bus interface allows each functional module to supply power to each other or transmit control signals.