CN209214169U - Compressor refrigeration control system based on microcontroller - Google Patents
Compressor refrigeration control system based on microcontroller Download PDFInfo
- Publication number
- CN209214169U CN209214169U CN201822054216.2U CN201822054216U CN209214169U CN 209214169 U CN209214169 U CN 209214169U CN 201822054216 U CN201822054216 U CN 201822054216U CN 209214169 U CN209214169 U CN 209214169U
- Authority
- CN
- China
- Prior art keywords
- interface
- microcontroller
- control
- circuit
- bidirectional triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The compressor refrigeration control system based on microcontroller that the utility model discloses a kind of, including control module and drive module；Control module includes microcontroller, micro-controller communications interface is connected with CAN communication interface by CAN transceiver, microcontroller temperature sampling interface is connected with library temperature sensor interface and defrosting sensor interface by temperature sampling circuit, microcontroller force samples interface has refrigerant high side pressure sensor interface and refrigerant low-pressure lateral pressure sensor interface by force samples circuit connection, and microcontroller memory interface is connected with memory；Drive module includes multiple thyristor gating circuits, and multiple thyristor gating circuits are respectively used to control compressor, heater strip, evaporator fan, condenser fan.The utility model issues parameter from host computer to control module using CAN communication, and communication speed is high, and stability is good；Load driving circuits switch long service life, increase surge absorbing circuit, and bidirectional triode thyristor is protected to damage from high voltage surge.
Description
Technical field
The utility model relates to compressor refrigeration control systems, more particularly, to the compressor refrigeration control based on microcontroller
System processed.
Background technique
The refrigeration control mode that existing compression mechanism cold control generally uses is led to by user key-press or by RS485
Letter receives the parameter that user issues, and some equipment need to issue parameter to controller by CAN bus, ask there are incompatible
Topic；Meanwhile control system is controlled using relay, relay has the limitation of on-off times service life, is not able to satisfy long life requirement；And
And do not have pipeline refrigerant pressure monitoring function, it is unable to real-time monitoring refrigeration pipeline pressure, refrigeration effect cannot be guaranteed.
Summary of the invention
The utility model aim is to provide a kind of compressor refrigeration control system based on microcontroller.
To achieve the above object, the utility model takes following technical proposals:
Compressor refrigeration control system described in the utility model based on microcontroller, including control module and driving mould
Block；The control module includes microcontroller, and the micro-controller communications interface is connected with CAN communication by CAN transceiver and connects
Mouthful, microcontroller temperature sampling interface is connected with library temperature sensor interface and defrosting sensor interface by temperature sampling circuit,
Microcontroller force samples interface has refrigerant high side pressure sensor interface and refrigerant low pressure by force samples circuit connection
Side pressure sensor interface, microcontroller memory interface are connected with memory；The drive module includes multiple control machines
Circuit, multiple thyristor gating circuits are respectively used to control compressor, heater strip, evaporator fan, condenser fan.
The thyristor gating circuit is four, and each thyristor gating circuit is driven by: optical isolation bidirectional triode thyristor
Device, bidirectional triode thyristor, surge absorbing circuit, overcurrent protector and loading interfaces composition；The optical isolation bidirectional triode thyristor driving
Device input control interface is connect with microcontroller output control interface, and the output control of optical isolation bidirectional triode thyristor driver connects
Mouth is connect with the bidirectional triode thyristor control signal, and bidirectional triode thyristor output control terminal passes through the surge absorbing circuit and mistake
Stream protector is connect with the loading interfaces.
The utility model advantage embodies in the following areas:
1, parameter is issued from host computer to control module using CAN communication, communication speed is high, and stability is good；
2, line pressure and real is acquired by refrigerant high side pressure sensor, refrigerant low-pressure lateral pressure sensor respectively
When monitor, can timely feedback in refrigerant pressure exception to host computer；
3, load driving circuits use optical isolation type bidirectional triode thyristor driving circuit, high pressure and low pressure all have it is good every
From；And bidirectional triode thyristor has the advantages that switch long service life；
4, increase surge absorbing circuit, bidirectional triode thyristor is protected to damage from high voltage surge.
Detailed description of the invention
Fig. 1 is the circuit principle structure block diagram of the utility model.
Fig. 2 is thyristor gating circuit theory structure block diagram described in the utility model.
Specific embodiment
It elaborates with reference to the accompanying drawing to the embodiment of the present invention, the present embodiment before being with technical solution of the present invention
It puts and is implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to down
State embodiment.
As shown in Figure 1, 2, the compressor refrigeration control system described in the utility model based on microcontroller, including control mould
Block 1 and drive module 2.
Control module 1 includes microcontroller, and micro-controller communications interface is connected with CAN communication interface by CAN transceiver,
Microcontroller temperature sampling interface is connected with library temperature sensor interface and defrosting sensor interface, micro-control by temperature sampling circuit
Device force samples interface processed has refrigerant high side pressure sensor interface and refrigerant low pressure side pressure by force samples circuit connection
Force snesor interface, microcontroller memory interface are connected with memory.
Drive module 2 includes four thyristor gating circuits, and the first thyristor gating circuit is for controlling compressor, and second
Thyristor gating circuit is for controlling heater strip, and for third thyristor gating circuit for controlling evaporator fan, the 4th is silicon-controlled
Trigger circuit is for controlling condenser fan.
Four thyristor gating circuits are by: optical isolation bidirectional triode thyristor driver, bidirectional triode thyristor, surge absoption electricity
Road, overcurrent protector and loading interfaces composition；The optical isolation bidirectional triode thyristor driver input control interface and the micro-control
Device output control interface connection processed, optical isolation bidirectional triode thyristor driver exports control interface and bidirectional triode thyristor control is defeated
Enter end connection, bidirectional triode thyristor output control terminal is connected by the surge absorbing circuit and overcurrent protector and the loading interfaces
It connects.
Utility model works principle is summarized as follows:
Host computer issues control parameter to the MCU of control module by CAN transceiver, have set temperature, setting the temperature difference, on
Electric delay time, defrosting start temperature, defrosting stopping temperature, time of dripping, high temperature alarm temperature deviation, low-temperature warning temperature are inclined
Difference, refrigerant low-pressure lateral pressure peak, refrigerant low-pressure lateral pressure minimum, refrigerant high side pressure peak, refrigerant high-pressure side
Pressure minimum.Above-mentioned parameter is stored in EEPROM, and parameter will not lose after the power-off of compressor refrigeration control system, and can
It is modified with receiving host computer transmitting order to lower levels.
Control module 1 acquires library temperature sensor temperature by temperature collection circuit, using microcontroller AD, and will adopt
The library temperature sensor temperature collected is compared with set temperature, setting temperature difference parameters.As library temperature sensor temperature is higher than set temperature
With setting the sum of temperature difference, control module 1 controls the first thyristor gating circuit, third thyristor gating circuit, the 4th silicon-controlled
Trigger circuit is opened, and compressor, evaporator fan, condenser fan are started；As library temperature sensor temperature is lower than set temperature, control
Molding block 1 controls the first thyristor gating circuit and closes, and compressor stops working.
Control module 1 acquires defrosting sensor temperature by temperature collection circuit, using microcontroller AD, and will adopt
Compared with the defrosting sensor temperature collected stops temperature parameter with defrosting start temperature, defrosting.The sensor temperature that such as defrosts is lower than
Defrost start temperature, and control module 1 controls the first thyristor gating circuit and closes, and compressor stops working, then control module 1
The unlatching of the second thyristor gating circuit is controlled, heater strip is started；The sensor temperature that such as defrosts is higher than defrosting and stops temperature, controls mould
Block 1 controls the second thyristor gating circuit and closes, and heater strip stops working, and control module opens timing, when timing time is greater than
It drips the time, control module 1 judges to open or be not turned on compressor according to the library temperature sensor temperature of acquisition.
Control module 1 acquires library temperature sensor temperature by temperature collection circuit, and by the library temperature sensor temperature of acquisition
Compared with set temperature, high temperature alarm temperature deviation, low-temperature warning temperature deviation.As library temperature sensor temperature is higher than set temperature
The sum of with high temperature alarm temperature deviation, control module 1 sends high temperature alarm instruction to host computer by CAN transceiver；Such as library temperature
Sensor temperature is lower than the difference of set temperature and low-temperature warning temperature deviation, and control module 1 passes through CAN transceiver circuit to upper
Machine sends low-temperature warning instruction；
Control module 1 acquires refrigerant high side pressure sensor by pressure acquisition circuit, using microcontroller AD
Pressure value and refrigerant low-pressure lateral pressure sensor pressure values, and by the pressure value of acquisition and refrigerant low-pressure lateral pressure peak, cold
Matchmaker's low-pressure lateral pressure minimum, refrigerant high side pressure peak, refrigerant high side pressure minimum compare.Such as refrigerant high-pressure side
Pressure sensor pressure value is greater than refrigerant high side pressure peak, and control module 1 is sent by CAN transceiver to host computer cold
Matchmaker high-pressure side over voltage alarm instruction；As refrigerant high side pressure sensor pressure value is less than refrigerant high side pressure minimum, control
Molding block 1 sends the instruction of refrigerant high-pressure side undervoltage warning to host computer by CAN transceiver；Such as refrigerant low-pressure lateral pressure sensor
Pressure value is greater than refrigerant low-pressure lateral pressure peak, and control module 1 sends refrigerant low-pressure side mistake to host computer by CAN transceiver
Press alarm command；If refrigerant low-pressure lateral pressure sensor pressure values are less than refrigerant low-pressure lateral pressure minimum, control module 1 passes through
CAN transceiver sends the instruction of refrigerant low-pressure side undervoltage warning to host computer.
As shown in Fig. 2, drive module 2 is made of four road thyristor gating circuits, thyristor gating circuit uses optical isolation
Bidirectional triode thyristor driver, bidirectional triode thyristor, surge absorbing circuit, overcurrent protector composition.Thyristor gating circuit receives control
The low-voltage control signal of molding block, control bidirectional triode thyristor conducting, drives rear end AC load (compressor, heater strip, evaporator
Blower, condenser fan).Wherein surge absorbing circuit is prevented by being connected to load both ends after resistance, high-voltage capacitance series connection double
Bidirectional triode thyristor is damaged to the surge voltage generated when silicon-controlled disconnection, overcurrent protector protection in load faulty or short circuit is driven
Dynamic model block.
Claims (2)
1. a kind of compressor refrigeration control system based on microcontroller, including control module and drive module；It is characterized by:
The control module includes microcontroller, and the micro-controller communications interface is connected with CAN communication interface by CAN transceiver,
Microcontroller temperature sampling interface is connected with library temperature sensor interface and defrosting sensor interface, micro-control by temperature sampling circuit
Device force samples interface processed has refrigerant high side pressure sensor interface and refrigerant low pressure side pressure by force samples circuit connection
Force snesor interface, microcontroller memory interface are connected with memory；The drive module includes multiple thyristor gating circuits,
Multiple thyristor gating circuits are respectively used to control compressor, heater strip, evaporator fan, condenser fan.
2. the compressor refrigeration control system based on microcontroller according to claim 1, it is characterised in that: described silicon-controlled
Trigger circuit is four, and each thyristor gating circuit is by optical isolation bidirectional triode thyristor driver, bidirectional triode thyristor, surge
Absorbing circuit, overcurrent protector and loading interfaces composition；The optical isolation bidirectional triode thyristor driver input control interface and institute
Microcontroller output control interface connection is stated, optical isolation bidirectional triode thyristor driver exports control interface and the bidirectional triode thyristor
Control signal connection, bidirectional triode thyristor output control terminal pass through the surge absorbing circuit and overcurrent protector and the load
Interface connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822054216.2U CN209214169U (en) | 2018-12-08 | 2018-12-08 | Compressor refrigeration control system based on microcontroller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822054216.2U CN209214169U (en) | 2018-12-08 | 2018-12-08 | Compressor refrigeration control system based on microcontroller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209214169U true CN209214169U (en) | 2019-08-06 |
Family
ID=67463578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822054216.2U Active CN209214169U (en) | 2018-12-08 | 2018-12-08 | Compressor refrigeration control system based on microcontroller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209214169U (en) |
-
2018
- 2018-12-08 CN CN201822054216.2U patent/CN209214169U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101556069B (en) | Speed adjusting device, air-conditioning system and speed adjusting method for air-conditioning system | |
| CN204651612U (en) | A kind of intelligent socket system with Monitoring and Controlling load appliance | |
| CN104976731B (en) | Air-conditioner controller and its safety control circuit | |
| WO2021047153A1 (en) | Compressor driving device, compressor pressure protection method, and air conditioner | |
| CN103512146B (en) | Air conditioning control method and device | |
| CN102072551A (en) | Air conditioner starting and operating at low voltage and control method thereof | |
| CN107490208B (en) | Refrigerant recovery control system of heat pump unit and control method thereof | |
| CN101655270A (en) | PFC enabling control method for air conditioner | |
| CN201181836Y (en) | Protecting equipment for air conditioner compressor | |
| CN209214169U (en) | Compressor refrigeration control system based on microcontroller | |
| CN201514086U (en) | Low-temperature refrigeratory hot water defrosting full-automatic control device | |
| CN200965954Y (en) | Load self-induction energy-saving socket | |
| CN110044035A (en) | Variable frequency air-conditioner controller fault tolerable circuit and control method | |
| CN200952799Y (en) | Air conditioning machine set | |
| CN202582032U (en) | Control device capable of controlling air door heater according to humidity | |
| CN109724338A (en) | A kind of cryogenic refrigeration operation controller | |
| CN206012266U (en) | A kind of automobile air conditioner control system | |
| CN109236627A (en) | Compressor protective circuit, circuit system and air conditioner | |
| CN204063458U (en) | A kind of recuperation of heat control circuit being applied to air-conditioner | |
| CN107421073A (en) | Control method, control device and the control circuit of air-conditioning system | |
| CN207196825U (en) | The control circuit of air-conditioning system | |
| CN210154027U (en) | Fault-tolerant circuit of variable-frequency air conditioner controller | |
| CN208504840U (en) | Electronic type defrosting timer | |
| CN208950836U (en) | Compressor protective circuit, circuit system and air conditioner | |
| CN112628939A (en) | Shared air conditioner anti-freezing protection control method and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |