CN114151936A

CN114151936A - HVAC system control unit and HVAC system

Info

Publication number: CN114151936A
Application number: CN202010928301.6A
Authority: CN
Inventors: 盖锐特·詹姆斯·戈·胡; 边文清; 孙海荣
Original assignee: Zhongshan Broad Ocean Motor Co Ltd
Current assignee: Zhongshan Broad Ocean Motor Co Ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2022-03-08
Also published as: WO2022047834A1

Abstract

The invention discloses an HVAC system control unit and an HVAC system, wherein the HVAC system control unit comprises a first functional module: the main control module is used for receiving control signals of an external temperature controller and controlling the plurality of relay modules; the main control module is also communicated with the motor control unit; the second functional module is a relay module which at least comprises a relay and is used for controlling the start and stop of the compressor, the resistance wire or other external equipment; each functional module is provided with an independent metal or plastic shell, and the functional modules are connected with each other through mutually matched connecting pieces and used for transmitting power or control signals among the functional modules; the HVAC system control unit is formed by combining and installing the functional modules, the production mode is flexible and convenient, the adaptability is strong, the research and development period can be shortened, the production is rapid and convenient, the operation reliability is higher, the after-sale maintenance is convenient, and the maintenance cost is reduced.

Description

HVAC system control unit and HVAC system

The technical field is as follows:

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

Background art:

in the field of heating, ventilating and air conditioning systems (HVAC systems for short), different brands of heating, ventilating and air conditioning systems can be generally divided into indoor units and outdoor units, and components equivalent to the functions of the outdoor units and the indoor units can also be installed on the same chassis to form a so-called "Packaged Unit". The indoor unit and the outdoor unit (including corresponding indoor unit components and outdoor unit components in the integrated air conditioner, the same applies hereinafter) include related devices such as a temperature controller, a centrifugal blower motor, a gas induced draft fan, a compressor, a heater wire, a heat pump, an axial fan and the like, and the structure is very complex, so that reference can be made to us 56565635, which is a general understanding of HVAC systems.

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

The traditional way of the HVAC system controller is that one manufacturer produces one or more HVAC system controllers, the HVAC system controllers are all produced at home, once a certain functional component of the controller is damaged, the whole HVAC system controller needs to be replaced, which brings great inconvenience to the after-sales repair market and causes higher repair cost.

In addition, the traditional HVAC system controller has poor compatibility and universality in a production mode, namely all functional components of the HVAC system are concentrated on one or two circuit boards, so that the flexibility is lost, and because the characteristics of the HVAC system required by each customer are different, some temperature controllers connected with 24VAC signals, some temperature controllers connected with serial port communication based on RS485, some temperature controllers connected with 0-10V signals, some temperature controllers without heat pump and dust removal control functions, some motors connected with different interface signals and the like are very complicated, so that the compatibility and the universality of the traditional HVAC system controller are poor. Therefore, each time the HVAC system manufacturer receives a development request from a customer, the HVAC system manufacturer almost re-develops, designs, and performs preliminary verification, and in view of this, it is desirable to consider an HVAC system controller that is easy to manufacture, assemble, design, and manufacture, has a short design and production cycle, is easy to repair and replace, and has a very low after-market repair cost.

The invention content is as follows:

the invention aims to provide an HVAC system control unit and an HVAC system, and solves the technical problems that the HVAC system control unit in the after-sale market is not flexible and convenient to produce, long in development time and production time, inconvenient in after-sale maintenance and high in maintenance cost.

The invention is realized by the following technical scheme:

an HVAC system control unit characterized by: it includes:

a first functional module: the main control module is used for receiving control signals of an external temperature controller and controlling the plurality of relay modules; the main control module is also communicated with the motor control unit;

the second functional module is a relay module which at least comprises a relay and is used for controlling the start and stop of the compressor, the resistance wire or other external equipment;

each functional module is provided with an independent metal or plastic shell, and the functional modules are connected with each other through mutually matched connecting pieces and used for transmitting power or control signals between the functional modules.

The main control module comprises a main control module microprocessor, a serial communication circuit, a temperature controller input signal interface circuit and a relay driving circuit, an external temperature controller is connected and communicated with the main control module microprocessor through the temperature controller input signal interface circuit, the serial communication circuit is used for communicating between the main control module and the motor control unit, and the main control module microprocessor controls a relay in the relay module to work through the relay driving circuit.

The main control module also comprises a pressure switch signal input port, and a compressor refrigerant pressure switch signal enters from the pressure switch signal input port and is transmitted to the main control module microprocessor.

The main control module also comprises a plurality of analog signal input ports, analog signals are input into the temperature detection circuit for detecting the temperature of the coil pipe or the air, and the analog signals are input into the main control module microprocessor through the analog signal input ports and processed by the A/D conversion circuit.

The main control module can obtain a power supply from the motor control unit, or a power supply circuit is independently arranged in the main control module and supplies power to each part of circuits in the main control module.

The HVAC system control unit described above further includes a third functional module: the outdoor unit defrosting module is used for defrosting the coil pipe of the outdoor unit in a heat pump mode, is also provided with an independent metal or plastic shell, and is connected with other functional modules through mutually matched connecting pieces and used for transmitting power or control signals among the functional modules.

The outdoor unit defrosting module comprises an outdoor coil temperature detection circuit, a defrosting control microprocessor, a relay driving circuit and a defrosting relay, wherein the temperature of the outdoor coil is detected by the outdoor coil temperature detection circuit and then is sent to the defrosting control microprocessor, the defrosting control microprocessor controls the defrosting relay by utilizing the relay driving circuit, and the defrosting relay controls a four-way electromagnetic valve in a refrigerant circulating and circulating loop of the HVAC system.

The functional modules are connected through the mutually matched connecting pieces, namely the functional modules are flexibly placed at different positions in a flexible flat cable connection mode.

The functional modules are connected with each other through the mutually matched connecting pieces, namely the functional modules are convenient to be drawn together by adopting a mode of oppositely inserting the male plug-in and the female plug-in, and the space is saved.

All the functional modules are arranged in a line and then are installed on an electric appliance installation guide rail, all the functional modules are connected through a flexible flat cable connection method, and the flexible flat cable connection method allows all the functional modules of a user to be vertically arranged or horizontally arranged or scattered to be installed at different positions.

All the functional modules are fixed on a base, the base is designed into a purely mechanical mounting base, the functional modules are connected through flexible flat cables, and the flexible flat cable connection allows the functional modules of a user to be vertically arranged or transversely arranged or scattered to be mounted at different positions.

All the functional modules are fixed on a base, and the base is additionally provided with a bus interface so that the functional modules can supply power or transmit control signals mutually.

The relay modules can be made into 1 or more, and when the relay modules are made into indoor relay modules and outdoor relay modules according to the functions of indoor units and outdoor units, the relay modules are not provided with microprocessors and driving circuits, and only 1 or more relays are integrated according to the number of control objects.

An HVAC system comprising an HVAC system control unit and a motor control unit, characterized by: the HVAC system control unit is the HVAC system control unit described above.

The motor control unit described above includes:

a fourth functional module: the power module is connected with commercial power, outputs a corresponding VDC direct current power supply for power supply, and supplies power for other functional modules;

a fifth functional module: the control system comprises a motor control module, a motor body controlled by the motor control module, a microprocessor and an IGBT inversion assembly, a DC power supply, a DC-DC power supply, a DC-DC power supply and a DC power supply;

a sixth functional module: i.e., an I/O module, for signal transmission between the HVAC system control unit or peripheral device and the motor control module; the I/O module at least comprises a serial port communication module;

each functional module in the motor control unit is provided with an independent metal or plastic shell and a circuit board positioned in the shell, and the functional modules in the motor control unit are connected with each other through mutually matched connecting pieces and used for transmitting power or control signals among the functional modules.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely the functional modules are flexibly placed at different positions by adopting a flexible flat cable connection mode.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely the functional modules are convenient to draw together by adopting a mode of oppositely inserting the male plug-in and the female plug-in, and the space is saved.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely all the functional modules are arranged in a line and then are installed on the installation guide rail of the electric appliance, and the functional modules are connected through the flexible flat cable connection, and the flexible flat cable connection allows the functional modules of a user to be vertically arranged or horizontally arranged or scattered to be installed at different positions.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely all the functional modules are fixed on a base, the base is designed into a purely mechanical mounting base, the functional modules are connected through flexible flat cables, and the flexible flat cables are connected to allow the functional modules of a user to be vertically arranged or horizontally arranged or dispersedly mounted at different positions.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely all the functional modules are fixed on a base, and the base is additionally provided with a bus interface to enable the functional modules to supply power or transmit control signals mutually.

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

1) the present invention subdivides an HVAC system control unit into a plurality of functional modules by function, including a first functional module: the main control module is used for receiving control signals of an external temperature controller and controlling the plurality of relay modules; the main control module is also communicated with the motor control unit; the second functional module is a relay module which at least comprises a relay and is used for controlling the start and stop of the compressor, the resistance wire or other external equipment; each above-mentioned functional module all has the shell of independent metal or plastics, is connected through the connecting piece that mutually supports between functional module and the functional module, is used for transmitting power or control signal between the functional module, and this kind of production mode of combination module, nimble convenience, strong adaptability can shorten research and development cycle, and production is swift convenient, and when after-sales maintenance, discovery certain functional module breaks down, can conveniently replace, reduces cost of maintenance, and easy maintenance is swift.

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

Description of the drawings:

FIG. 1 is a block diagram of a prior art HVAC system layout;

FIG. 2 is a schematic diagram of a prior art HVAC system;

FIG. 3 is a block diagram of one application of the HVAC system control unit of a first embodiment of the present invention;

FIG. 4 is a detailed circuit block diagram of the HVAC system control unit corresponding to FIG. 3;

FIG. 5 is a block diagram of another application of an HVAC system control unit in accordance with a first embodiment of the present invention;

FIG. 6 is a detailed circuit block diagram of the HVAC system control unit corresponding to FIG. 5;

fig. 7 is a circuit block diagram of a main control module according to a first embodiment of the present invention;

FIG. 8 is a detailed circuit diagram of an input signal interface circuit corresponding to the one of the thermostats of FIG. 7;

FIG. 9 is a block circuit diagram of an outdoor defrost module according to a first embodiment of the present invention;

FIG. 10 is an angled perspective view of a functional module according to a first embodiment of the present invention;

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

fig. 12 is an exploded view of a functional module according to a first embodiment of the present invention;

FIG. 13 is an assembled, angled perspective view of a modular motor controller according to a first embodiment of the present invention;

FIG. 14 is another perspective view of a modular motor controller according to an embodiment of the present invention, shown assembled;

FIG. 15 is a perspective view of an electrical mounting rail according to a first embodiment of the present invention;

fig. 16 is an angular perspective view of a functional module according to a second embodiment of the present invention;

fig. 17 is an exploded view of a functional module according to a second embodiment of the present invention;

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

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

fig. 20 is an angular assembly view of the modular motor controller of the second embodiment of the present invention;

fig. 21 is a perspective view of a motor body according to a third embodiment of the present invention;

fig. 22 is a structural sectional view of a motor body according to a third embodiment of the present invention;

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

fig. 24 is a perspective view of a third embodiment of the present invention.

The specific implementation mode is as follows:

the present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 3 and 4, the HVAC system control unit of the present invention is an application of an HVAC system having a heat pump function and an outdoor defrosting function, and the HVAC system uses a conventional temperature controller (THERMOSTAT), a heat pump and an Air heat exchanger (Air Handler), and includes a main control module, an indoor relay module, an outdoor defrosting module, and an electric control unit communication module. Wherein:

the main control module is responsible for receiving a refrigeration signal (including high-grade, low-grade or single-grade), a heating signal (including high-grade, low-grade or single-grade) or a continuous fan signal of the temperature controller and then transmitting the signals to the electronic control unit communication module.

The indoor relay module is used for controlling the resistance wire and switching on the corresponding contact after receiving the signal of the temperature controller. Some resistance wires are in high and low gears, so two relays are needed.

The outdoor relay module primarily controls the power supply to the compressor, including single and two speed compressors, solenoid valves for gear selection of the two speed compressor, and an optional Crankcase Heater.

As shown in fig. 9, the outdoor unit defrosting module includes an outdoor coil temperature detection circuit, a defrosting control microprocessor (which may be a single-chip MCU), a relay driving circuit, and a defrosting relay, wherein the outdoor coil temperature is detected by the outdoor coil temperature detection circuit and then sent to the defrosting control microprocessor, which controls the defrosting relay by using the relay driving circuit, and the defrosting relay controls a four-way solenoid valve in a refrigerant circulation loop of the HVAC system. The defrosting control microprocessor can configure the duration of the defrosting mode and the conditions of entering and leaving the defrosting mode, the temperature of the outdoor coil is detected by the temperature detection circuit and is used for receiving a switch signal when the temperature of the outdoor coil reaches a set value, the thermocouple can also be supported, the defrosting control microprocessor can instantly judge the temperature of the coil and enters the defrosting mode at proper time, and the defrosting relay controls a four-way electromagnetic valve in a refrigerant circulation loop of the HVAC system to execute defrosting action.

As shown in fig. 5 and 6, another application of the HVAC system control unit of the present invention is applied to an HVAC system without a heat pump and an outdoor defrosting function, the HVAC system employs a serial communication type thermostat + AC type Air conditioner (non-heat pump type) power control + Air heat exchanger (Air Handler) structure, and the HVAC system control unit includes a main control module, an indoor relay module, an outdoor relay module, and an electric control unit communication module. Wherein: the main control module is responsible for receiving and replying a calling refrigeration signal (including high-grade, low-grade or single-grade), a heating signal (including high-grade, low-grade or single-grade) or a continuous fan signal of the temperature controller or other control signals supported by a communication protocol, and then transmitting the signals to the communication module of the electric control unit through the sub-communication module of the main control module. The indoor relay module is used for controlling the resistance wire and switching on the corresponding contact after receiving the signal of the temperature controller. Some resistance wires are in high and low gears, so two relays are needed. The outdoor relay module primarily controls the power supply to the compressor, including single and two speed compressors, solenoid valves for gear selection of the two speed compressor, and an optional Crankcase Heater. At this time, when the outdoor unit is controlled by an AC power supply (namely, AC Only), namely, when Only one refrigeration device is used, Only the outdoor relay module is needed to control the on-off motor shell, and other outdoor unit control panels are not needed.

Indoor relay module and outdoor relay module are located indoor and outdoor division according to the control object only, and in fact, indoor relay module and outdoor relay module can merge into a relay module, and relay module the inside contains a plurality of relay, and relay module the inside does not take microprocessor and drive circuit, has just gathered 1 or a plurality of relay according to how much of control object.

As shown in fig. 7, the main control module includes a temperature controller input signal interface circuit, a main control module microprocessor (which may be a single-chip MCU) and a plurality of relay driving circuits, in fig. 7, there are N relays, JK1 and JK2 … … JKN, respectively, for controlling different electrical components or devices, such as a compressor, a heating wire, a heater, etc., and a plurality of relays are integrated to form a relay module. At present, the most common temperature control meters on the market comprise 3 types, one type is a traditional temperature control meter outputting a 24VAC signal, and the traditional temperature control meter comprises common Y1/Y2/W1/W2/G/RVS signal output; the other is a temperature controller based on serial port communication of RS 485; the third is: a temperature controller supporting 0-10VDC or 4-20mA control signals; based on the 3 types of temperature control meters, the main control module can be made into 3 types of parts to adapt to a 24VAC signal temperature control meter, an RS 485-based serial port communication temperature control meter and a temperature control meter supporting 0-10VDC or 4-20mA control signals, so that the combination and installation are convenient, and the technical problems of quick production and flexible installation and maintenance are solved; fig. 8 is a circuit diagram of a temperature controller input signal interface circuit in the main control module, which corresponds to a temperature controller of 24VAC signal, and adopts photoelectric coupling chips U1, U2, U3, U4 and U5 to convert the multiple 24VAC signals of the temperature controller into direct current signals to be input into the main control module microprocessor for processing. Similarly, a corresponding main control module for receiving 0-10VDC or 4-20mA may be provided for a temperature controller outputting analog signals such as 0-10VDC or 4-20mA, and as for serial port communication based on RS485, a specially corresponding input signal interface circuit of the temperature controller may be designed in the main control module, which are the prior art and will not be described in detail herein.

An HVAC system control unit characterized by: it includes:

The production mode of the combined module is flexible and convenient, has strong adaptability, can shorten the research and development period, is fast and convenient to produce, can conveniently replace when a certain functional module breaks down after being maintained after sale, reduces the maintenance cost, and is convenient and fast to maintain.

The main control module comprises a main control module microprocessor, a serial communication circuit, a temperature controller input signal interface circuit and a relay driving circuit, an external temperature controller is connected and communicated with the main control module microprocessor through the temperature controller input signal interface circuit, the serial communication circuit is used for communicating between the main control module and the motor control unit, and the main control module microprocessor controls a relay in the relay module to work through the relay driving circuit. The main control module is also provided with a plurality of ports for switching signal input and analog signal input. The switch signal ports (port one and port two in fig. 7) may be connected to pressure switches for monitoring refrigerant in the compressor, which may typically include a High Pressure Switch (HPS) and a Low Pressure Switch (LPS). The analog signal ports (port three, port four and port five in fig. 7) can be connected to a temperature control probe (thermostat) that detects the temperature of the coil or the air, so that the main control module has some error reporting or additional control logic. And firmware (firmware) of the main control module can start or disable the Anti Short Cycle function for preventing the frequent start of the compressor through the communication module. In the invention, such as a 'refrigerant pressure switch signal of a compressor', 'a temperature detection circuit for detecting the temperature of a coil or air inputs an analog signal', 'Crankcase Heater', 'Anti Short Cycle' are optional functions, in practical application, if a user does not provide/need the signals and controlled components, the HVAC system control unit related to the invention can still normally operate, a driving program can default that the functions are in a 'forbidden' state, and the functions can be configured and enabled through a matched PC program or Bluetooth App.

The functional modules are connected through the mutually matched connecting pieces, namely the functional modules can be flexibly placed at different positions in a flexible flat cable connection mode.

The functional modules are connected with each other through the mutually matched connecting pieces, namely the functional modules can be conveniently closed together by adopting a mode of oppositely inserting the male plug-in and the female plug-in, and the space is saved.

As shown in fig. 10 to 15, each functional module has a housing 1 of independent metal or plastic and a circuit board 2 or a relay inside the housing 1, and when the functional module is a relay module, the inside of the housing 1 is a relay; when the functional module is other functional modules, the circuit board 2 is arranged in the shell 1; the circuit board 2 stretches out and connects the plug port 3, the plug port 3 exposes and exposes out the shell 1, each functional module is connected with the flexible flat cable 4, power supply and signal transmission are realized, each functional module has the shell 1 of independent metal or plastics, parts can be effectively protected, the risk of touching between each functional module can be avoided, effective anti-electromagnetic interference is realized, and the operational reliability of products is guaranteed. In fig. 13, the HVAC system control unit of the present invention is formed by combining 1

main control module

7, 1 relay module 8, and 1 outdoor unit defrosting module 10, two clamping blocks 11 are disposed at the rear side of the housing 1, a clamping groove is formed between the two clamping blocks 11, a plurality of function modules are combined in parallel by passing the electric appliance mounting rail 6 through the clamping groove between the two clamping blocks 11, a boss 61 is formed at the middle of the electric appliance mounting rail 6, a plurality of mounting holes 62 are disposed at intervals on the boss 61, the electric appliance mounting rail 6 can be locked on a load by passing screws through the mounting holes 62, and screw heads on the screws (not shown in the figure) sink into a groove 63 at one side of the boss 61. Every different functional module all is the unified cuboid shell of height and degree of depth, and shell width size can be different, selects all functional modules to arrange in a word, does not leave the gap between two adjacent modules, then installs on electrical apparatus installation guide rail 6, and simple to operate is nimble, can fast production and assembly. In fig. 11, only 2 connector ports 3 are shown in the circuit board 2, but for the main control module, there are usually more than 3 connector ports 3, because it is connected to external connection more, and the number of connector ports 3 is determined according to the requirement of the function module.

Example two:

as shown in fig. 16 to 20, in the present embodiment, the mounting and connection manner of each functional module is improved on the basis of the first embodiment: specifically, all the functional modules of the present invention are fixed on a base 100, which is designed as a purely mechanical mounting base, and a bus interface can also be added to the purely mechanical mounting base, so that the functional modules supply power to each other or transmit control signals.

In fig. 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, the first circuit board 2b extends out of a plurality of male plug ports 3b, and the male plug ports 3b extend out of the casing 1b by a distance, so that the male plug ports 3b and the female plug ports 103 on the base 100 are electrically connected together in a plug-and-socket manner. Of course, the relay module has a housing 1b of independent metal or plastic and a relay inside the housing 1b, and the input and output terminals of the relay are connected to the male connector port 3b through lead wires, forming a connector function.

As shown in fig. 18 and 19, the base 100 includes an upper casing 101, a lower casing 102 and a second circuit board 104, the second circuit board 104 is installed in a cavity enclosed by the upper casing 101 and the lower casing 102, the second circuit board 104 is provided with a plurality of bus communication unit circuits and power supply circuits, the second circuit board 104 extends out of a plurality of female connector ports 103, the base 100 is provided with a plurality of rows of female connector ports 103, and each row has two spaced female connector ports 103.

As shown in fig. 20, the first circuit board 2b extends out of 2 male connector ports 3b to be electrically connected with 2 female connector ports 103 in the same row on the base 100 in a plug-and-socket manner, so as to perform power supply connection and signal transmission connection, respectively. Of course, the first circuit board 2b has other plug ports, which are not shown in the figure, so as to be externally connected with the input and output of the commercial power alternating current or the peripheral control signal. 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, and the main control module 7, the relay module 8, and the outdoor unit defrosting module 10 are inserted into the base 100 to form an HVAC system control unit.

The HVAC system control unit of the invention does not distinguish between indoor and outdoor, can be integrated together during installation, and can also be installed in a decentralized way, and the description of each functional module not only considers the requirement of OEM mass production, but also can be suitable for after-market and is represented by different part numbers.

The first functional module, namely the master control module, provides the master control module with different part numbers according to the matching with the signal of the market universal temperature controller, such as:

part number F101: covers a temperature control meter suitable for a 24VAC signal on the market;

part number F102: the temperature controller is suitable for serial port communication based on RS485 in the market; at this time, the Firmware (Firmware) of the main control module must support the communication protocol used by the temperature controller.

Part number F103: a temperature controller suitable for 0-10V signals on the market is covered;

part number F104: a temperature control meter suitable for 4-20mA signals on the market is covered;

a second functional module: the relay module can divide parts into different part numbers according to the number of control objects.

A fourth functional module: the outdoor unit defrosting module basically has 1 part to meet the requirement.

Through the functional modules, a user can flexibly select the functional modules according to the needs of the user.

Example three:

as shown in fig. 3 and 4, an HVAC system includes an HVAC system control unit and a motor control unit, and is characterized in that: the HVAC system control unit is the HVAC system control unit of embodiment one or embodiment two. As shown in fig. 21 and 22, the motor body 200 includes a motor housing 201, a stator assembly 202, a rotor assembly 203, a bearing, and a rotating shaft. The motor control unit is equivalent to the current motor controller, but the motor control unit is of a combined structure.

As shown in fig. 23, the motor control unit includes:

a sixth functional module: i.e., an I/O module, for signal transmission between the HVAC system control unit or peripheral device and the motor control module; the I/O module includes at least one serial communication module to establish a connection communication with a master control module of the HVAC system controller.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, which means that the functional modules are flexibly placed at different positions by adopting a flexible flat cable connection mode, and the manufacturing and installation modes shown in fig. 10 to 15 can be referred.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely the functional modules are convenient to be close together by adopting a mode of oppositely inserting the male plug-in unit and the female plug-in unit, so that the space is saved, and the manufacturing and mounting modes shown in fig. 10 to 15 can be referred.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, that is, all the functional modules are arranged in a line and then installed on the installation guide rail of the electric appliance, and the functional modules are connected through the flexible flat cable connection, and the flexible flat cable connection allows the functional modules of a user to be installed at different positions in a vertical arrangement, a transverse arrangement or a dispersed arrangement, which can refer to the manufacturing and installation modes of fig. 10 to 15.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, that is, all the functional modules are fixed on a base, the base is designed into a purely mechanical mounting base, the functional modules are connected through flexible flat cable connection, the flexible flat cable connection allows the functional modules of a user to be vertically arranged or horizontally arranged or scattered to be mounted at different positions, and the manufacturing and mounting manner shown in fig. 16 to 20 can be referred.

The functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, which means that all the functional modules are fixed on a base, and a bus interface is added on the base, so that the functional modules supply power or transmit control signals to each other, and the manufacturing and installation manners shown in fig. 16 to 20 can be referred.

The production mode of the combined module is flexible and convenient, strong adaptability can shorten the research and development period, the production is rapid and convenient, the operation reliability is higher, when after-sales maintenance is carried out, a certain functional module is found to have a fault, the replacement can be conveniently carried out, the maintenance cost is reduced, and the maintenance is convenient and rapid.

The I/O modules are subdivided into a plurality of types according to their functions, including:

the motor control module is provided with a corresponding driver to be compatible with different communication protocols based on the RS485 serial port communication module;

the Bluetooth wireless communication module enables a user to wirelessly communicate with the motor control module through a mobile phone App or a PC for configuration and diagnosis;

and the pulse output module is used for monitoring a certain parameter of the motor by the main control board of a client through outputting pulses.

The Ethernet LAN module supports common TCP/IP protocol, and can access the motor control module into building network control or remotely control and monitor the parameter state of the motor through Internet.

The human-machine interface HMI function module provides a single-color basic HMI and a high-grade high-definition color screen according to market division, so that a user can directly control the motor, control the rotating speed/torque/air volume of the motor in real time, or carry out configuration and diagnosis, and even can be used for laboratory test.

The coded disc switch module is connected with the motor control module through a connector, and a row of DipSwitch is provided for a user to change parameters of the motor in real time.

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

The combined motor control unit does not distinguish the indoor unit motor from the outdoor unit motor, and the motor bodies of the indoor unit and the outdoor unit can use the part number of the same functional module as long as the voltage and the power are suitable. The following description of the functional modules is applicable to the after market as well as to the OEM mass production needs.

And the fourth functional module, namely the power module, the surge protection circuit, the rectifying and filtering circuit and the DC-DC voltage reduction circuit, receives the commercial power and outputs corresponding direct current. My design is to provide power modules of different part numbers according to different voltages and motor powers, such as:

part number a 101: 120/230/277VAC three voltage/60 Hz/1Ph, covering motors suitable for 1/4HP and below;

part number a 102: 120/230/277VAC three voltage/60 Hz/1Ph, motors covering 1/3HP and 1/2 HP;

part number a 101: 120/230/277VAC three voltage/60 Hz/1Ph, motors covering 3/4HP and 1 HP;

part number a 104: 460VAC/60Hz/3Ph, motors covering 1.2HP to 2 HP;

part number a 105: 460VAC/60Hz/3Ph, motors covering 2.3HP to 3.5 HP;

part number a 105: 460VAC/60Hz/3Ph, encompassing a 5HP motor;

……

part number a 10N: 575VAC/60Hz3Ph, covering 5HP motors;

power supply modules for other voltage and power segments are not always written, and in short, a power supply module should have 10 or more part numbers in order to meet the requirements of different voltages and powers. However, the advantage is that once all of these part numbers are determined, the customer has flexibility in choosing a match and a 1HP power module can simultaneously power two 1/2HP motor bodies.

A fifth functional module: the motor control module controls a motor body of a motor, comprises a microprocessor MCU + IGBT inversion assembly (inversion circuit assembly) + a heat dissipation device, receives a VDC direct current power supply and a control signal, and outputs a UVW three-phase (or multi-phase) power supply to the motor body, so that the control of the rotating speed, the torque or the air volume is realized. If the Hall element is required to detect the rotor position signal, the motor control module also needs a Hall signal input port.

The motor control module should also have a port for updating to ensure compatibility with different input/output modules, correct Bug, add functionality in the future, etc. And a port for connection to a PC for programmatically configuring the parameters of the motor. Similarly, the part number of this functional module may be such that:

part number B101: motor body suitable for DM2 motor of 1/4HP and below

Part number B102: motor body suitable for DM3 motor of 1/4HP and below

Part number B103: motor body suitable for 1/3HP and 1/2HP DM2 motors

Part number B104: motor body suitable for 1/3HP and 1/2HP DM3 motors

……

Part number B120: motor body suitable for 5HP DM2 motor

Part number B131: motor body suitable for 5HP DM3 motor

The serial port communication module based on RS485 in the sixth functional module, the motor control module should have corresponding drive to be compatible with different communication protocols such as Modbus, ClimateTalk.

The serial port communication module based on RS485, the motor control module is required to have corresponding drive to be compatible with different communication protocols, and the part number of the motor control module is C104;

the Bluetooth wireless communication module enables a user to wirelessly communicate with the motor control module through a mobile phone App or a PC for configuration and diagnosis, and the part number of the Bluetooth wireless communication module is C105;

and the pulse output module is used for monitoring a certain parameter of the motor by a main control board of a customer through outputting pulses, and the part number of the pulse output module is C106.

The Ethernet LAN module supports common TCP/IP protocol, can insert the motor control module into building network control, or monitor the parameter state of the motor through the internet remote control, the Ethernet LAN module establishes connection communication with the microprocessor in the motor control module, and the part number is C107.

The human-computer interface HMI function module provides a single-color basic HMI and a high-grade high-definition color screen according to market division, so that a user can directly control the motor, control the rotating speed/torque/air volume of the motor in real time, or carry out configuration and diagnosis, even can be used for laboratory tests, the human-computer interface HMI function module establishes connection communication with the motor control module, and the part number is C108.

The code wheel switch module is connected with the motor control module through a connector, a row of DipSwitch is provided for a user to change parameters of the motor in real time, the code wheel switch module is connected and communicated with the motor control module, and the part number of the code wheel switch module is C109.

Through the above functional modules, the user can flexibly select according to the needs of the user, and a few examples are given here:

example one: user A, commercial Air conditioner adopts 24VAC tradition temperature control meter, needs the outdoor unit motor of a 3HP indoor set motor of simultaneous control and two 1/3HP, and outdoor unit part is single speed compressor AC type, and indoor set part is Air Handler configuration resistance wire. The solution is as follows:

HVAC main control module

Resistance wire of relay module control indoor unit

Compressor of outdoor unit controlled by relay module

One power supply module is enough to supply power for three motors, (two or three small power supply modules can be selected), and a power supply module with a specific part number is selected;

a 3HP motor control module for selecting a corresponding motor control module with a specific part number;

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

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

the module assembling and production can be carried out by selecting different modules, research and development and design are not needed in the early stage, the production period is short, the research and development cost is saved, and after-sale maintenance is convenient.

Example two: and a user B adopts a serial port communication type temperature controller for a household Air conditioner, an outdoor unit is a double-speed compressor, has the function of a heat pump and carries a Crankcase heater (Crankcase heater), and an indoor unit is an Air Handler configured double-gear resistance wire. Need to control an 1/2HP indoor set motor and a 1/4HP outdoor set motor simultaneously, the solution:

an HVAC main control module;

resistance wire of one relay module control indoor machine (two relays for controlling resistance wire of double gears)

A relay module for controlling the compressor of the outdoor unit (comprising a relay for controlling the line voltage of the compressor and a relay for controlling the high-low gear switching of the compressor)

A relay module controls a Crankcase Heater (crank Heater) of the outdoor unit compressor.

One power module is enough to supply power for two motors

1/2HP motor control module

1/4HP motor control module

Two serial port communication input module (I/O module)

Through the above cases, the previous integrated controller is divided into the functional modules, so that the user can flexibly select different parts according to the needs of the user, the cost is reduced for the OEM user compared with the previous 'big and complete' design, and the cost is saved for the after-sale market because which module is damaged and is replaced. Moreover, the functional modules can be arranged on a base to form a practical 'centralized control' and can also be arranged at different positions, and convenience in installation is also provided for customers.

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

As shown in fig. 24, the present invention can install all the functional modules of the HVAC system control unit and the motor control unit in combination on one base 100, and each functional module performs power supply connection and data transmission through the data bus and the power bus on the second circuit board of the base 100, thereby forming a whole. In the figure, the main control module 7, the relay module 8, the outdoor unit defrosting module 10, the power module 11, the motor control module 12, the serial port communication input module 13 and the bluetooth wireless communication module (used for communication between the motor and the external device) are respectively arranged from left to right, so that the base 100 is shared, the space and the 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 module 11.

The above embodiments are only preferred embodiments of the present invention, but the present invention is not limited thereto, and any other changes, modifications, substitutions, combinations, simplifications, which are made without departing from the spirit and principle of the present invention, are all equivalent replacements within the protection scope of the present invention.

Claims

1. An HVAC system control unit characterized by: it includes:

2. The HVAC system control unit of 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 driving circuit, an external temperature controller is connected and communicated with the main control module microprocessor through the temperature controller input signal interface circuit, the serial communication circuit is used for communicating between the main control module and the motor control unit, and the main control module microprocessor controls a relay inside the relay module to work through the relay driving circuit.

3. The HVAC system control unit of claim 2, wherein: the main control module also comprises a pressure switch signal input port, and a compressor refrigerant pressure switch signal enters from the pressure switch signal input port and is transmitted to the main control module microprocessor.

4. The HVAC system control unit of claim 2, wherein: the main control module also comprises a plurality of analog signal input ports, analog signals are input into a temperature detection circuit for detecting the temperature of the coil pipe or the air, and the analog signals are input into the main control module microprocessor through the analog signal input ports and processed by the A/D conversion circuit.

5. The HVAC system control unit of claim 2, wherein: the main control module can obtain a power supply from the motor control unit, or a power supply circuit is independently arranged in the main control module and supplies power to each part of circuits in the main control module.

6. The HVAC system control unit of claim 1, 2, 3, 4, or 5, wherein: it also includes a third functional module: the outdoor unit defrosting module is used for defrosting the coil pipe of the outdoor unit in a heat pump mode, is also provided with an independent metal or plastic shell, and is connected with other functional modules through mutually matched connecting pieces and used for transmitting power or control signals among the functional modules.

7. The HVAC system control unit of claim 6, wherein: the outdoor unit defrosting module comprises an outdoor coil temperature detection circuit, a defrosting control microprocessor, a relay driving circuit and a defrosting relay, wherein the temperature of the outdoor coil is detected by the outdoor coil temperature detection circuit and then is sent to the defrosting control microprocessor, the defrosting control microprocessor controls the defrosting relay by utilizing the relay driving circuit, and the defrosting relay controls a four-way electromagnetic valve in a refrigerant circulating and circulating loop of the HVAC system.

8. The HVAC system control unit of any one of claims 1-5, wherein: the functional modules are connected through the mutually matched connecting pieces, namely the functional modules are flexibly placed at different positions by adopting a flexible flat cable connection mode.

9. The HVAC system control unit of any one of claims 1-5, wherein: the functional modules are connected with each other through the mutually matched connecting pieces, namely the functional modules are convenient to be close together by adopting a mode of oppositely inserting the male plug-in and the female plug-in, and the space is saved.

10. The HVAC system control unit of any one of claims 1-5, wherein: all the functional modules are arranged in a line and then are installed on an electric appliance installation guide rail, all the functional modules are connected through a flexible flat cable connection method, and the flexible flat cable connection method allows all the functional modules of a user to be vertically arranged or horizontally arranged or scattered to be installed at different positions.

11. The HVAC system control unit of any one of claims 1-5, wherein: all the functional modules are fixed on a base, the base is designed into a purely mechanical mounting base, all the functional modules are connected through flexible flat cables, and the flexible flat cables are connected to allow all the functional modules of a user to be vertically arranged or transversely arranged or scattered to be mounted at different positions.

12. The HVAC system control unit of any one of claims 1-5, wherein: all the functional modules are fixed on a base, and the base is additionally provided with a bus interface so that the functional modules can supply power mutually or transmit control signals.

13. The HVAC system control unit of claim 1, 2, 3, 4, or 5, wherein: the relay modules can be made into 1 or more, and when the relay modules are made into indoor relay modules and outdoor relay modules according to the functions of indoor units and outdoor units, the relay modules are not provided with microprocessors and driving circuits, and only 1 or more relays are integrated according to the number of control objects.

14. An HVAC system comprising an HVAC system control unit and a motor control unit, characterized by: the HVAC system control unit of any one of claims 1 to 13.

15. The HVAC system of claim 14, wherein: the motor control unit includes:

16. The HVAC system of claim 15, wherein: the functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely the functional modules are flexibly placed at different positions by adopting a flexible flat cable connection mode.

17. The HVAC system of claim 15, wherein: the functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely the functional modules are convenient to draw together by adopting a mode of oppositely inserting the male plug-in unit and the female plug-in unit, and the space is saved.

18. The HVAC system of claim 15, wherein: the functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely all the functional modules are arranged in a line and then are installed on the installation guide rail of the electric appliance, the functional modules are connected through the flexible flat cable connection, and the flexible flat cable connection allows the functional modules of a user to be vertically arranged or horizontally arranged or to be installed at different dispersed positions.

19. The HVAC system of claim 15, wherein: the functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely all the functional modules are fixed on a base, the base is designed into a purely mechanical mounting base, the functional modules are connected through flexible flat cables, and the flexible flat cables are connected to allow the functional modules of a user to be vertically arranged or transversely arranged or scattered to be mounted at different positions.

20. The HVAC system of claim 15, wherein: the functional modules in the motor control unit are connected with each other through the mutually matched connecting pieces, namely all the functional modules are fixed on a base, and the base is additionally provided with a bus interface to enable the functional modules to supply power or transmit control signals mutually.