CN217902300U - Refrigerating unit control system based on wireless radio frequency - Google Patents
Refrigerating unit control system based on wireless radio frequency Download PDFInfo
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- CN217902300U CN217902300U CN202222241613.7U CN202222241613U CN217902300U CN 217902300 U CN217902300 U CN 217902300U CN 202222241613 U CN202222241613 U CN 202222241613U CN 217902300 U CN217902300 U CN 217902300U
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Abstract
The utility model discloses a refrigerating unit control system based on wireless radio frequency, which comprises a control panel arranged in a cab, an electric control box arranged on a freight box of a locomotive and a standby power supply control system arranged at the bottom of the locomotive, wherein the control panel is in radio frequency communication with the electric control box and the standby power supply control system; the utility model provides a refrigerating unit control system based on wireless radio frequency, control panel and the control box that is used for controlling vehicle fridge refrigerating unit work and for refrigerating unit provides stand-by power supply control system radio frequency communication of stand-by power supply, laying of circuit when having removed the wired communication mode from, thereby removed the pencil installation from, the cost of unit installation has been saved, and can effectively avoid adopting the trouble problem that leads to because of pencil wearing and tearing among the pencil connected mode, the effectual system security and the stability that have improved.
Description
Technical Field
The utility model belongs to the technical field of vehicle refrigerating unit control, specifically be a refrigerating unit control system based on wireless radio frequency.
Background
The refrigerating unit on the vehicle is used for controlling the temperature in the refrigerating box of the vehicle, and can reduce the temperature in the carriage in the environment with higher temperature, so that the temperature in the carriage is kept at a proper degree, and further, the long-distance and short-distance cold chain transportation is realized.
In order to facilitate the remote control of the vehicle refrigerating unit, the Chinese utility model with the authorization publication number of CN212842115U discloses a vehicle and a remote control system of the refrigerating unit, which comprises a cold control module and a remote communication module, wherein the cold control module comprises a refrigeration controller connected with equipment in the refrigerating unit, the remote communication module comprises a remote controller, and the refrigeration controller is in communication connection with the remote controller through an RS485 bus; according to the technical scheme provided by the utility model, due to the arrangement of the cloud server, operation and maintenance personnel can input signals through intelligent setting, such as temperature setting, the remote controller transmits the signals to the refrigeration controller through the RS485 bus, and the refrigeration controller controls the working state of equipment in the refrigeration unit, so that the use is convenient;
although the utility model provides a technical scheme can realize driver's remote control, but remote controller passes through the RS485 bus and is connected with refrigeration controller, and it need lay the circuit in the vehicle, when installation refrigerating unit for the installation is loaded down with trivial details, and need drill on vehicle instrument, thereby has caused destruction to vehicle itself.
SUMMERY OF THE UTILITY MODEL
The not enough to prior art, the utility model provides a refrigerating unit control system based on wireless radio frequency has solved the problem that proposes in the above-mentioned background art.
The utility model discloses technical scheme as follows:
a refrigerating unit control system based on wireless radio frequency comprises a control panel arranged in a cab, an electric control box arranged on a freight box of a locomotive, and a standby power supply control system arranged at the bottom of the locomotive,
the control panel is in radio frequency communication with the electric control box and the standby power supply control system;
a control panel circuit is integrated in the control panel and comprises a second MCU chip and a second power supply circuit, the second MCU chip is electrically connected with a second radio frequency transceiver circuit, a light intensity detection circuit, a liquid crystal display interface circuit and a second key circuit, the second power supply circuit comprises a voltage reduction circuit for converting 24V voltage into 23V and 5V voltage and a voltage stabilizing circuit for converting 5V voltage into 3.3V voltage, and the second power supply circuit is electrically connected with the second MCU chip, the second radio frequency transceiver circuit, the light intensity detection circuit and the liquid crystal display interface circuit;
a main control module and a radio frequency transceiving module electrically connected with the main control module are arranged in the electric control box, the radio frequency transceiving module is in radio frequency communication with the second radio frequency transceiving circuit, the main control module is connected with a plurality of relays and a plurality of sensors, the sensors are used for detecting the environment in the vehicle refrigerating box, and the relays receive a control instruction of the main control module to control the operation of the refrigerating unit;
the standby power supply control system comprises a first MCU chip and a first power supply circuit, wherein the first MCU chip is electrically connected with a first radio frequency transceiver circuit, a first key circuit, an output control circuit and three standby power detection circuits, the first power supply circuit comprises an AC-DC power supply conversion circuit and a DC-DC power supply conversion circuit, the AC-DC power supply conversion circuit converts input alternating current into 23V direct current, the DC-DC power supply conversion circuit converts the 23V direct current output by the AC-DC power supply conversion module into 5V direct current, the first radio frequency transceiver circuit is in communication connection with the second radio frequency transceiver circuit, the first power supply circuit provides power for the first radio frequency transceiver circuit, the first key circuit, the output control circuit and the three standby power detection circuits, the output control circuit is connected with a driving interface circuit, the driving interface circuit serves as a compressor power supply switching module in the cold closet, the three standby power detection circuits are connected with three-phase power supply interface circuits, and the three power supply interface circuits are connected to a main control module of the cold storage box through circuits.
Advantageous effects
Compared with the prior art, the utility model provides a refrigerating unit control system based on wireless radio frequency possesses following beneficial effect:
the utility model provides a refrigerating unit control system based on wireless radio frequency, control panel and the control box that is used for controlling vehicle fridge refrigerating unit work and for refrigerating unit provides stand-by power supply control system radio frequency communication of stand-by power supply, laying of circuit when having removed the adoption wired communication mode from, thereby wiring harness installation process has been removed from, the cost of unit installation has been saved, and can effectively avoid adopting the trouble problem that leads to because of the pencil wearing and tearing among the pencil connected mode, the effectual system security and the stability that have improved.
Furthermore, the second MCU chip is electrically connected with a second voltage detection circuit, an LED drive circuit, a key backlight circuit and a key indication circuit, and the second voltage detection circuit, the LED drive circuit, the key backlight circuit and the key indication circuit all provide power through a second power circuit.
Furthermore, the second MCU chip is electrically connected with a buzzer, and the buzzer is powered by the second power circuit.
Furthermore, the second MCU chip is electrically connected with an RS485 interface circuit, and the RS485 interface circuit is connected with an external interface circuit.
Furthermore, the first MCU chip is electrically connected to a first voltage detection circuit and a current detection circuit, and the first voltage detection circuit and the current detection circuit are electrically connected to the first power circuit.
Further, first MCU chip electric connection has 485 communication circuit and CAN communication circuit, CAN communication circuit is connected with CAN interface circuit.
Further, the plurality of sensors at least comprise an exhaust temperature sensor, a return temperature sensor and a defrosting temperature sensor, so as to respectively detect exhaust, return and defrosting temperature conditions in the vehicle refrigerating box.
Furthermore, the main control module is also connected with a pipeline high-voltage switch, a pipeline low-voltage switch and a pipeline medium-voltage switch, and the on-off condition of the pipeline is controlled according to the pipeline pressure detection condition.
Furthermore, the relays at least comprise clutches which are respectively used for controlling the evaporation fan, the condensation fan, the injection valve, the defrosting valve, the stop valve and the compressor.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a schematic diagram of a second MCU chip connection pin of the control panel of the present invention;
fig. 3 is a schematic diagram of a second power circuit of the control panel of the present invention;
fig. 4 is a light intensity detection circuit of the control panel of the present invention;
fig. 5 is a second voltage detection circuit of the control panel according to the present invention;
fig. 6 is a LED driving circuit of the control panel of the present invention;
fig. 7 is a schematic diagram of a buzzer circuit of the control panel of the present invention;
fig. 8 is a schematic diagram of a second key circuit of the control panel of the present invention;
fig. 9 is a key backlight circuit of the control panel of the present invention;
fig. 10 is a key indicating circuit of the control panel according to the present invention;
fig. 11 is a schematic diagram of an RS485 interface circuit and an external interface circuit of the middle control panel according to the present invention;
fig. 12 is a schematic diagram of a first rf transceiver circuit and a second rf transceiver circuit according to the present invention;
fig. 13 is a schematic diagram of a first MCU chip connection pin of the control circuit of the middle refrigeration unit of the present invention;
fig. 14 is a schematic diagram of a first power circuit of the control circuit of the refrigerating unit of the present invention;
fig. 15 is a schematic diagram of a first voltage detection circuit of the control circuit of the refrigerating unit according to the present invention;
fig. 16 is a schematic diagram of a current detection circuit of the control circuit of the refrigerating unit of the present invention;
fig. 17 is a schematic diagram of a nixie tube driving circuit of the control circuit of the refrigerating unit according to the present invention;
fig. 18 is a schematic diagram of a 485 communication circuit of the control circuit of the refrigerating unit of the present invention;
fig. 19 is a schematic diagram of a first key circuit of the control circuit of the refrigerating unit according to the present invention;
fig. 20 is a schematic diagram of an output control circuit and a driving interface circuit of the control circuit of the refrigerating unit according to the present invention;
FIG. 21 is a schematic diagram of a CAN communication circuit and a CAN interface circuit of a control circuit of a middle refrigerating unit according to the present invention;
fig. 22 is a schematic diagram of the three-phase standby power detection circuit and the three-phase power interface circuit of the control circuit of the middle refrigerating unit of the present invention.
Fig. 23 is a schematic diagram of an internal circuit of the middle electric control box of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1, a radio frequency-based refrigerating unit control system includes a control panel disposed in a cab, an electronic control box disposed on a freight box of a locomotive, and a standby power control system disposed at a bottom of the locomotive, wherein the control panel is in radio frequency communication with the electronic control box and the standby power control system; the driver can set the temperature condition in the vehicle refrigerating box through the control panel, can display the temperature value condition in the refrigerating box, and can control the standby power supply circuit to provide the standby power supply for the refrigerating unit through the control panel.
In the utility model, as shown in fig. 1-12, the control panel circuit is integrated in the control panel, the control panel circuit includes second MCU chip and second power supply circuit, second MCU chip electric connection has second radio frequency transceiver circuit, light intensity detection circuit, liquid crystal display interface circuit and second keying circuit, second power supply circuit includes the step-down circuit that converts 24V voltage into 23V and 5V voltage and the voltage stabilizing circuit that converts 5V voltage into 3.3V voltage, second power supply circuit and second MCU chip, second radio frequency transceiver circuit, light intensity detection circuit, liquid crystal display interface circuit are with electric connection; the second MCU chip is electrically connected with a second voltage detection circuit, an LED drive circuit, a key backlight circuit and a key indication circuit, and the second voltage detection circuit, the LED drive circuit, the key backlight circuit and the key indication circuit are all powered by a second power circuit; the second MCU chip is electrically connected with a buzzer, and the buzzer is powered by a second power circuit; the second MCU chip is electrically connected with an RS485 interface circuit, the RS485 interface circuit is connected with an external interface circuit, and the RS485 interface circuit and the external interface circuit are used for connecting external equipment by RS785 communication;
when the utility model is implemented, as shown in fig. 2, the model of the second MCU chip is HC32F460JETA; as shown in fig. 3, the voltage reduction circuit of the second power circuit includes a voltage reduction chip of model XL7015E1, which can convert an input 24V power into 23V and 5V power, the input 24V power can be electrically connected to the second power circuit by a voltage stabilizing circuit of the second power circuit, which includes a voltage stabilizing chip of model AMS1117-3.3, which can convert a 5V power output by the voltage reduction circuit into a 3.3V power to provide power for each power utilization module in the control panel circuit;
when the light intensity detection circuit is in a working state, the light intensity detection circuit detects the illumination intensity in the cab by means of the photoresistor and feeds detected electric signals back to the second MCU chip, when the light in the cab is weak (the specific light intensity can be determined according to the type of the selected photoresistor), the second MCU chip sends an opening instruction to the key backlight circuit, and the LED driving circuit drives each key light corresponding to each case in the key backlight circuit to be lightened so that the control panel can display specific keys on the key, and when the light intensity detection circuit can be understood by technicians in the field, the keys are all display keys on a liquid crystal display screen which are connected with the second MCU chip through a liquid crystal display screen interface circuit; the buzzer provides operation prompt tones and prompt tones of the running state of the control panel when the key operation is carried out, and the key indicating circuit is used for providing blue, red and yellow flat head light; one end of the second voltage detection circuit is connected with the 24V power supply input end, and the other end of the second voltage detection circuit is connected with the second MCU chip, so that the voltage condition of the control panel circuit can be detected.
As shown in fig. 1 and 23, in the present invention, a main control module and a radio frequency transceiver module electrically connected to the main control module are disposed in the electrical control box, the radio frequency transceiver module is in radio frequency communication with the second radio frequency transceiver circuit, the main control module is connected to a plurality of relays and a plurality of sensors, the sensors are used for detecting the environment in the vehicle refrigerator, and the relays receive the control command from the main control module to control the operation of the refrigerator set; further, the plurality of sensors at least comprise an exhaust temperature sensor, a return air temperature sensor and a defrosting temperature sensor so as to respectively detect exhaust, return air and defrosting temperature conditions in the vehicle refrigerating box; the main control module is also connected with a pipeline high-voltage switch, a pipeline low-voltage switch and a pipeline medium-voltage switch, and the on-off condition of the pipeline is controlled according to the pipeline pressure detection condition; the relays at least comprise a clutch which is respectively used for controlling the evaporation fan, the condensation fan, the injection valve, the defrosting valve, the stop valve and the compressor;
the exhaust temperature sensor, the return air temperature sensor and the defrosting temperature sensor detect the temperature condition in the vehicle refrigerating box in real time, and the detected temperature is uploaded to a second MCU chip in a control panel circuit in a cab through a radio frequency signal through a radio frequency transceiver module, the second MCU chip judges the operation conditions of the evaporation fan, the condensation fan, the injection valve, the defrosting valve, the stop valve and the compressor clutch according to a temperature threshold value set through a second key circuit (the temperature threshold value can be set according to the condition of refrigerated goods refrigerated inwards by the vehicle), so that a corresponding action execution instruction is sent to a main control module in the electric control box through a radio frequency signal through a second radio frequency transceiver circuit, and the action execution instruction is obtained by technicians in the field, and the action execution instruction controls the start and stop of the corresponding evaporation fan or condensation fan or injection valve or defrosting valve or stop valve or compressor clutch according to the temperature condition detected by different temperature sensors after the comparison of the detected temperature and the set temperature threshold value is finished.
As shown in fig. 1 and 12-22, the standby power control system includes a first MCU chip and a first power circuit, the first MCU chip is electrically connected to a first rf transceiver circuit, a first key circuit, an output control circuit, and three standby power detection circuits, the first power circuit includes an AC-DC power conversion circuit and a DC-DC power conversion circuit, the AC-DC power conversion circuit converts an input AC power into a 23V DC power, the DC-DC power conversion circuit converts the 23V DC power output by the AC-DC power conversion module into a 5V DC power, the first rf transceiver circuit is communicatively connected to the second rf transceiver circuit, the first power circuit provides power for the first rf transceiver circuit, the first key circuit, the output control circuit, and the three standby power detection circuits, the output control circuit is connected to a driving interface circuit, the driving interface circuit serves as a compressor power switching module in the refrigerator, the three-phase standby power detection circuit is connected to a three-phase power interface circuit, and the three-phase standby power interface circuit is connected to a main control module of the electronic control box through a circuit; the first MCU chip is electrically connected with a first voltage detection circuit and a current detection circuit, and the first voltage detection circuit and the current detection circuit are electrically connected with the first power supply circuit; the first MCU chip is electrically connected with a 485 communication circuit and a CAN communication circuit, and the CAN communication circuit is connected with a CAN interface circuit;
in the utility model, the model of first MCU chip is HC32F460JETA, AC-DC power supply converting circuit includes the power conversion chip that the model is HA12P24-HV, and it converts the alternating current of input into 23V's DC power supply, DC-DC power supply converting circuit includes the power conversion chip that the model is XL7015E1, and it converts the 23V power supply after AC-DC power supply converting circuit conversion into 5V DC power supply, provides the power for stand-by power supply control circuit;
the working process of the standby power supply control system is as follows: when a vehicle stops starting, all electrical elements in a control box of the vehicle refrigerating box stop running, loads in the refrigerating box stop running synchronously, a power supply input port of an AC-DC power supply conversion circuit of a first power supply circuit is connected with a 220V municipal power supply, one end of the AC-DC power supply conversion circuit outputs a 23V voltage power supply, the other end of the AC-DC power supply conversion circuit is connected with a compressor power supply switching module, the compressor power supply switching module drives an interface circuit to be connected, so that the power supply mode of a vehicle-mounted compressor of the vehicle refrigerating box is switched, the input end of the DC-DC power supply conversion circuit is connected with the 23V power supply output end of the AC-DC power supply conversion circuit, and the 23V power supply is converted into a 5V power supply; the three-phase power supply detection circuit electrically connected with the first MCU chip is used for detecting whether the three-phase power supply normally supplies power, and the three-phase power supply interface circuit connected with the three-phase power supply detection circuit is connected into a control box of the vehicle refrigerating box so as to provide the three-phase power supply for a load of the vehicle-mounted refrigerating box.
The utility model discloses in, RS485 interface circuit reaches rather than electric connection's external interface circuit, RS485 communication circuit, CAN communication circuit and rather than the CAN interface circuit who is connected is reservation communication structure, when specifically using, CAN adopt 485 communications or CAN communication mode to communicate.
In this embodiment, the main control module may adopt a commercially available single chip microcomputer, the radio frequency transceiver module includes a third radio frequency transceiver circuit, the schematic diagram of the third radio frequency transceiver circuit refers to fig. 12, the radio frequency transceiver module is a pluggable module, and at least 9-12 pins of the third radio frequency transceiver circuit are connected to the plug interface, so as to be connected to the main control module in a plug manner.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (9)
1. The utility model provides a refrigerating unit control system based on wireless radio frequency, includes the control panel who sets up in the driver's cabin, sets up automatically controlled box on locomotive freight container, sets up the stand-by power supply control system in locomotive bottom, its characterized in that:
the control panel is in radio frequency communication with the electric control box and the standby power supply control system;
a control panel circuit is integrated in the control panel and comprises a second MCU chip and a second power supply circuit, the second MCU chip is electrically connected with a second radio frequency transceiver circuit, a light intensity detection circuit, a liquid crystal display interface circuit and a second key circuit, the second power supply circuit comprises a voltage reduction circuit for converting 24V voltage into 23V and 5V voltage and a voltage stabilizing circuit for converting 5V voltage into 3.3V voltage, and the second power supply circuit is electrically connected with the second MCU chip, the second radio frequency transceiver circuit, the light intensity detection circuit and the liquid crystal display interface circuit;
the main control module and the radio frequency transceiving module electrically connected with the main control module are arranged in the electric control box, the radio frequency transceiving module is in radio frequency communication with the second radio frequency transceiving circuit, the main control module is connected with a plurality of relays and a plurality of sensors, the sensors are used for detecting the environment in the vehicle refrigerating box, and the relays receive control instructions of the main control module to control the operation of the refrigerating unit;
the standby power supply control system comprises a first MCU chip and a first power supply circuit, wherein the first MCU chip is electrically connected with a first radio frequency transceiver circuit, a first key circuit, an output control circuit and a three-phase standby power supply detection circuit, the first power supply circuit comprises an AC-DC power supply conversion circuit and a DC-DC power supply conversion circuit, the AC-DC power supply conversion circuit converts input alternating current into 23V direct current, the DC-DC power supply conversion circuit converts 23V direct current output by the AC-DC power supply conversion module into 5V direct current, the first radio frequency transceiver circuit is in communication connection with a second radio frequency transceiver circuit, the first power supply circuit provides power for the first radio frequency transceiver circuit, the first key circuit, the output control circuit and the three-phase standby power supply detection circuit, the output control circuit is connected with a driving interface circuit, the driving interface circuit serves as a compressor power supply switching module in the refrigeration box, the three-phase standby power supply detection circuit is connected with the three-phase power supply interface circuit, and the three-phase power supply interface circuit is connected to a main control module of the electronic control box through a circuit.
2. The radio frequency based refrigeration unit control system as set forth in claim 1 wherein: the second MCU chip is electrically connected with a second voltage detection circuit, an LED drive circuit, a key backlight circuit and a key indication circuit, and the second voltage detection circuit, the LED drive circuit, the key backlight circuit and the key indication circuit are all powered by a second power circuit.
3. The radio frequency based refrigeration unit control system as set forth in claim 1 wherein: the second MCU chip is electrically connected with a buzzer, and the buzzer is powered by a second power circuit.
4. The wireless radio frequency based refrigerating unit control system according to claim 1, wherein the second MCU chip is electrically connected with an RS485 interface circuit, and the RS485 interface circuit is connected with an external interface circuit.
5. The radio frequency based refrigeration unit control system as set forth in claim 1 wherein: the first MCU chip is electrically connected with a first voltage detection circuit and a current detection circuit, and the first voltage detection circuit and the current detection circuit are electrically connected with the first power supply circuit.
6. The radio frequency based refrigeration unit control system as set forth in claim 1 wherein: first MCU chip electric connection has 485 communication circuit and CAN communication circuit, CAN communication circuit is connected with CAN interface circuit.
7. The radio frequency based refrigeration unit control system as set forth in claim 1 wherein: the plurality of sensors at least comprise an exhaust temperature sensor, a return air temperature sensor and a defrosting temperature sensor so as to respectively detect exhaust, return air and defrosting temperature conditions in the vehicle refrigerating box.
8. The radio frequency based refrigeration unit control system as set forth in claim 7 wherein: the main control module is also connected with a pipeline high-voltage switch, a pipeline low-voltage switch and a pipeline medium-voltage switch, and the on-off condition of the pipeline is controlled according to the pipeline pressure detection condition.
9. The radio frequency based refrigeration unit control system as set forth in claim 7 wherein: the relays at least comprise clutches which are respectively used for controlling the evaporation fan, the condensation fan, the injection valve, the defrosting valve, the stop valve and the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222241613.7U CN217902300U (en) | 2022-08-24 | 2022-08-24 | Refrigerating unit control system based on wireless radio frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222241613.7U CN217902300U (en) | 2022-08-24 | 2022-08-24 | Refrigerating unit control system based on wireless radio frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217902300U true CN217902300U (en) | 2022-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222241613.7U Active CN217902300U (en) | 2022-08-24 | 2022-08-24 | Refrigerating unit control system based on wireless radio frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217902300U (en) |
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2022
- 2022-08-24 CN CN202222241613.7U patent/CN217902300U/en active Active
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