CN112810401B - Control method of cold machine control system for new energy automobile - Google Patents

Control method of cold machine control system for new energy automobile Download PDF

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Publication number
CN112810401B
CN112810401B CN202110045928.1A CN202110045928A CN112810401B CN 112810401 B CN112810401 B CN 112810401B CN 202110045928 A CN202110045928 A CN 202110045928A CN 112810401 B CN112810401 B CN 112810401B
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equipment controller
refrigeration equipment
control
interface
relay
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CN112810401A (en
Inventor
肖聪
於家华
苏磊
汪斌
窦明佳
王金员
刘新
林凌
石秀柱
周建兵
徐凯
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Dongfeng Automobile Co Ltd
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Dongfeng Automobile Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3202—Cooling devices using evaporation, i.e. not including a compressor, e.g. involving fuel or water evaporation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H2001/3286—Constructional features
    • B60H2001/3292—Compressor drive is electric only

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Power Engineering (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

A control method of a cold machine control system for a new energy automobile comprises a refrigeration equipment controller U2, a frequency converter U3, a compressor CP, an automobile power battery U4, an alternating current plug PSR, an intermediate relay KA, an alternating current contactor KM and a voltage reduction rectification circuit U5; the control method of the refrigerator control system for the new energy automobile comprises power supply control, power-on control of a refrigerator, temperature control of a compressor and hydraulic control of cooling liquid. In the design, the refrigeration equipment controller and the cold machine can be powered by a power battery or a power grid, the two power supply modes can ensure no mutual influence, and the refrigeration equipment controller can effectively and safely ensure the normal operation of the system according to the control of the operation mode of the system by the refrigerant pressure in the system, the evaporator temperature and the compressor temperature.

Description

Control method of cold machine control system for new energy automobile
Technical Field
The invention relates to a control method of a refrigerator control system, in particular to a control method of a refrigerator control system for a new energy automobile, which is particularly suitable for controlling a refrigerator for the new energy automobile.
Background
With the improvement of life quality of people, the demand for substances is increasing, people pay more attention to the quality and safety of food, and the demand for cold chain vehicles is also increasing in order to reduce the corrosion of fresh fruits, vegetables, flowers and the like in the transportation process. With the popularization of new energy automobiles and the appearance of pure electric cold chain vehicles, the road pressure is reduced to a certain extent, and the problems of high cost and low efficiency in the refrigeration logistics industry are effectively solved.
The design of a cold machine control system of a pure electric cold chain vehicle is greatly different from that of a traditional cold chain vehicle, and the power supply mode of a cold machine is also different.
Disclosure of Invention
The invention aims to solve the problem that a pure electric cold chain vehicle in the prior art is difficult to effectively use a whole vehicle power battery and an urban power grid to supply power to a cold machine, and provides a control method of a cold machine control system for a new energy vehicle, which can effectively use the whole vehicle power battery and the urban power grid to supply power to the cold machine.
In order to achieve the above purpose, the technical solution of the invention is as follows:
a control method of a cold machine control system for a new energy automobile comprises a refrigeration equipment controller U2, a frequency converter U3, a compressor CP, an automobile power battery U4, an alternating current plug PSR, an intermediate relay KA, an alternating current contactor KM and a voltage reduction rectification circuit U5;
the storage battery power supply interface + XLV of the refrigeration equipment controller U2 is electrically connected with the positive electrode of the storage battery;
the enabling interface 18 of the refrigeration equipment controller U2 is connected with the ignition switch IGN;
the anode of the automobile power battery U4 is connected with the anode of the DC input end of the frequency converter U3 after being connected with the first DC contactor KHV1 in series, the cathode of the automobile power battery U4 is connected with the cathode of the DC input end of the frequency converter U3 after being connected with the second DC contactor KHV2 in series,
the frequency converter U3 is electrically connected with the compressor CP, a three-phase alternating current input end of the frequency converter U3 is electrically connected with an alternating current plug PSR after being connected with an alternating current contactor KM in series, the alternating current plug PSR is electrically connected with an input end of a voltage reduction rectifying circuit U5, an output end of the voltage reduction rectifying circuit U5 is connected with an upper power supply interface + SLV of the refrigeration equipment controller U2, an output end of the voltage reduction rectifying circuit U5 is connected with an upper relay STR1 in series and then is connected with an upper enable interface 8 of the refrigeration equipment controller U2, and an upper power supply interface + SLV of the refrigeration equipment controller U2 is connected with a control coil of an upper relay STR1 in series and then is grounded;
The intermediate relay KA is a single-pole double-throw relay, a power supply selection interface 6 of the refrigeration equipment controller U2 is connected with the common end of the intermediate relay KA, a normally closed contact of the intermediate relay KA is connected with a control coil of a first direct current contactor KHV1 in series and then grounded, the control coil of the first direct current contactor KHV1 is connected with a control coil of a second direct current contactor KHV2 and a solid-state relay cooling fan MF1 in parallel, a normally open contact of the intermediate relay KA is connected with a control coil of an alternating current contactor KM in series and then grounded, and two ends of the control coil of the intermediate relay KA are connected to two different phases of an alternating current plug PSR respectively;
the control method of the cold machine control system for the new energy automobile comprises power supply control, wherein the power supply control comprises the following steps:
the cold machine for the new energy automobile is powered by an automobile power battery U4:
s1, supplying power to a refrigerating equipment controller U2 through a storage battery power supply interface + XLV, powering on a refrigerating equipment controller U2, starting an ignition switch IGN, sending a high level to an enabling interface 18 of a refrigerating equipment controller U2 by the ignition switch IGN, activating the enabling interface 18 of a refrigerating equipment controller U2, and starting the refrigerating equipment controller U2 to work;
s2, after a refrigeration equipment controller U2 starts working, because a control coil of an intermediate relay KA is not powered, a common end of the intermediate relay KA is connected with a normally closed contact of the intermediate relay KA, a control coil of a direct current first direct current contactor KHV1, a control coil of a second direct current contactor KHV2 and a solid state relay cooling fan MF1 are connected with a power supply selection signal interface 6 of the refrigeration equipment controller U2, the power supply selection signal interface 6 of the refrigeration equipment controller U2 outputs high level to enable the control coil of the first direct current contactor KHV1, the control coil of the second direct current contactor KHV2 and the solid state relay cooling fan MF1 to be powered, so that the first direct current contactor KHV1 and the second direct current contactor KHV2 are closed, an automobile power battery U4 is a frequency converter U3 which supplies high voltage direct current, and a frequency converter U3 is used for supplying power to a compressor CP;
Meanwhile, the solid-state relay cooling fan MF1 starts to work to cool the first dc contactor KHV1 and the second dc contactor KHV 2;
the refrigerator for the new energy automobile is powered by an urban power grid:
s3, an alternating current plug PSR is connected to an urban power grid, a voltage reduction rectification circuit U5 connected to the alternating current plug PSR is powered on, the voltage reduction rectification circuit U5 converts the urban power grid alternating current at the output end of the alternating current plug PSR into usable low-voltage direct current and outputs the usable low-voltage direct current to an upper power supply interface + SLV of a refrigeration equipment controller U2, the refrigeration equipment controller U2 is powered on, at the moment, a control coil of an upper relay STR1 connected with the upper power supply interface + SLV is powered on, the upper relay STR1 is closed, an upper enable interface 8 of a refrigeration equipment controller U2 is connected with the output end of the voltage reduction rectification circuit U5 through an upper relay STR1, at the moment, the upper enable interface 8 is activated, and the refrigeration equipment controller U2 starts to work;
s4, after the refrigeration equipment controller U2 starts working, a control coil of an intermediate relay KA connected with an alternating current plug PSR is electrified, a common end of the intermediate relay KA is connected with a normally open contact of the intermediate relay KA, a control coil of an alternating current contactor KM is communicated with a power supply selection signal interface 6 of the refrigeration equipment controller U2, the power supply selection signal interface 6 of the refrigeration equipment controller U2 outputs high level to electrify the control coil of the alternating current contactor KM, the alternating current contactor (KM) is closed, a first direct current contactor KHV1 and a second direct current contactor KHV2 are disconnected, the alternating current plug PSR supplies power to a frequency converter U3, and the frequency converter U3 supplies power to a compressor CP.
A first positive electrode interface 16 of the refrigeration equipment controller U2 is electrically connected with a positive electrode terminal of a temperature control panel U1, a negative electrode terminal of the temperature control panel U1 is electrically connected with a negative electrode interface 13 of a refrigeration equipment controller U2, a control signal interface 17 of the refrigeration equipment controller U2 is in signal connection with a temperature control panel U1, and a temperature control interface 7 of the refrigeration equipment controller U2 is connected in series with a control coil of a starting relay STR3 and then grounded;
a common end of the frequency converter U3 is connected in series with an enabling end of the frequency converter U3 after a relay STR3 is started;
a first evaporator fan control port 1 of the refrigeration equipment controller U2 is electrically connected with a first evaporator fan ME1, and a second evaporator fan control port 2 of the refrigeration equipment controller U2 is electrically connected with a second evaporator fan ME 2;
the control system of the refrigerator for the new energy automobile further comprises a first condensation relay STR5 and a second condensation relay STR4, wherein the first condensation relay STR5 and the second condensation relay STR4 are both single-pole double-throw relays, a second condenser fan control interface 4 of the refrigeration equipment controller U2 is connected with a common end of the second condensation relay STR4 after being connected with a second condenser fan MC2 in series, a normally open contact of the second condensation relay STR4 is grounded, a normally closed contact of the second condensation relay STR4 is electrically connected with a normally closed contact of the first condensation relay STR5, a normally open contact of the first condensation relay STR5 is connected with a first condenser fan control interface 3 of the refrigeration equipment controller U2, and a common end of the first condensation relay STR5 is connected with the first condenser fan MC1 in series and then grounded;
The method for controlling the refrigerator for the new energy automobile further comprises refrigerator power-on control, wherein the refrigerator power-on control comprises the following steps:
a1, after the refrigeration equipment controller U2 starts working, the refrigeration equipment controller U2 supplies power to a temperature control panel U1 through a first positive electrode interface 16, the temperature control panel U1 is powered on, and the temperature control panel U1 sends a control signal to a control signal interface 17 of the refrigeration equipment controller U2 to control the start and stop of the refrigeration equipment controller U2;
a2, after a refrigeration equipment controller U2 is started and starts to work, a second condenser fan control interface 4 of the refrigeration equipment controller U2 is sequentially connected with a first condenser fan MC1 and a second condenser fan MC2 in series and then grounded, and the second condenser fan control interface 4 of the refrigeration equipment controller U2 controls the first condenser fan MC1 and the second condenser fan MC2 to be started and work at a low speed;
meanwhile, a first evaporator fan control port 1 of the refrigeration equipment controller U2 controls a first evaporator fan ME1 to be started and operated, and a second evaporator fan control port 2 controls a second evaporator fan ME2 to be started and operated;
a3, after the first evaporator fan ME1, the second evaporator fan ME2, the first condenser fan MC1 and the second condenser fan MC2 work for a set time Tm1, the temperature control interface 7 of the refrigeration equipment controller U2 outputs high level to electrify a coil of a starting relay STR3 of the frequency converter U3, a contact of the starting relay STR3 is closed, an enabling end of the frequency converter U3 is activated, the frequency converter U3 works, and the frequency converter U3 controls the compressor CP to start working.
The temperature control interface 7 of the refrigeration equipment controller U2 is sequentially connected with a temperature switch TS and a liquid spraying electromagnetic valve BPVS in series and then grounded;
the cold machine control method for the new energy automobile further comprises compressor temperature control, wherein the compressor temperature control comprises the following steps:
after the compressor CP starts to work, when the temperature of the compressor CP exceeds a first set temperature T1, the temperature switch TS is closed, the temperature control interface 7 of the refrigeration equipment controller U2 is communicated with the liquid spraying electromagnetic valve BPVS, the liquid spraying electromagnetic valve BPVS is electrified and opened to cool the compressor CP, and the compressor CP is prevented from being overheated;
when the temperature of the compressor CP is lowered below the first set temperature T1, the temperature switch TS is turned off, and the liquid injection solenoid valve BPVS is de-energized to stop the operation.
The second positive interface 14 of the refrigeration equipment controller U2 is electrically connected with the positive terminal of the cooling liquid pressure sensor HPS, the negative terminal of the cooling liquid pressure sensor HPS is electrically connected with the negative interface 13 of the refrigeration equipment controller U2, and the pressure signal interface 15 of the refrigeration equipment controller U2 is in signal connection with the signal end of the cooling liquid pressure sensor HPS;
a low-voltage switch interface 9 of the refrigeration equipment controller U2 is connected with a low-voltage switch LP in series and then is grounded;
A temperature control interface 7 of the refrigeration equipment controller U2 is sequentially connected in series with a medium-voltage switch MP and a control coil of a first condensation relay STR5 and then grounded, and a control coil of the first condensation relay STR5 is connected in parallel with a control coil of a second condensation relay STR 4;
the control method of the cold machine for the new energy automobile further comprises hydraulic control of cooling liquid, wherein the hydraulic control of the cooling liquid comprises the following steps:
when the liquid spraying electromagnetic valve BPVS continuously works, the cooling liquid pressure sensor HPS detects the hydraulic pressure of the cooling liquid and sends a hydraulic signal of the cooling liquid to the refrigeration equipment controller U2;
when the hydraulic pressure of the cooling liquid is smaller than the minimum pressure Pmin, the low-pressure switch LP is disconnected, the refrigeration equipment controller U2 sends a low-pressure alarm signal to the temperature control panel U1 after detecting that the low-pressure switch LP is disconnected, and the temperature control panel U1 displays a cooling liquid low-pressure alarm;
when the refrigeration device controller U2 detects that the coolant hydraulic pressure is less than the third set pressure P3, the first condenser fan control interface 3 and the second condenser fan control interface 4 of the refrigeration device controller U2 control the first condenser fan MC1 and the second condenser fan MC2 to turn off;
when the refrigeration device controller U2 detects that the coolant pressure reaches the second set pressure P2, the first condenser fan control interface 3 and the second condenser fan control interface 4 of the refrigeration device controller U2 control the first condenser fan MC1 and the second condenser fan MC2 to be turned on;
When the hydraulic pressure of the cooling liquid reaches a first set pressure P1, the medium pressure switch MP is closed, the temperature control interface 7 of the refrigeration equipment controller U2 is simultaneously connected with the control coil of the first condensation relay STR5 and the control coil of the second condensation relay STR4, the temperature control interface 7 sends out high level to enable the control coil of the first condensation relay STR5 and the control coil of the second condensation relay STR4 to be electrified, the common end of the first condensation relay STR5 is connected with a normally open contact thereof, the common end of the second condensation relay STR4 is connected with the normally open contact thereof, at the moment, the second condenser fan control interface 4 of the refrigeration equipment controller U2 is connected with the second condenser fan MC2 in series and then grounded, the first condenser fan control interface 3 of the refrigeration equipment controller U2 is connected with the first condenser fan MC1 in series and then grounded, and the first condenser fan MC1 and the second condenser fan MC2 work at a high speed;
when the refrigeration equipment controller U2 detects that the hydraulic pressure of the cooling liquid exceeds the maximum pressure Pmax, the refrigeration equipment controller U2 sends a high-pressure alarm signal to the temperature control panel U1, and the temperature control panel U1 displays a cooling liquid high-pressure alarm;
the minimum pressure Pmin < the third set pressure P3 < the second set pressure P2 < the first set pressure P1 < the maximum pressure Pmax.
An evaporator temperature signal interface 11 of the refrigeration equipment controller U2 is grounded after being connected with a defrosting temperature sensor Tdef in series, and a defrosting signal output interface 5 of the refrigeration equipment controller U2 is grounded after being connected with a defrosting electromagnetic valve DEVS in series;
the cold machine control method for the new energy automobile further comprises an evaporator temperature control method, and the evaporator temperature control method comprises the following steps:
b1: the defrosting temperature sensor Tdef sends the acquired evaporator temperature signal to the refrigeration equipment controller U2, when the refrigeration equipment controller U2 detects that the temperature of the evaporator is lower than a second set temperature T2, the refrigeration equipment controller U2 sends a low-temperature alarm signal to the temperature control panel U1, and the temperature control panel U1 displays a defrosting prompt after receiving the low-temperature alarm signal;
b2: after the temperature control panel U1 receives the low-temperature alarm signal and displays the defrosting prompt, if the temperature control panel U1 receives the defrosting control signal input by an external operator, the temperature control panel U1 sends the defrosting signal to the refrigeration equipment controller U2; if the temperature control panel U1 does not receive the defrosting control signal input by an external operator, the temperature control panel U1 sends a defrosting signal to the refrigeration equipment controller U2 at regular time;
after the refrigeration equipment controller U2 receives the defrosting signal, the defrosting signal output interface 5 of the refrigeration equipment controller U2 sends a high level to the defrosting solenoid valve DEVS, and the defrosting solenoid valve DEVS is activated to defrost.
The return air temperature signal interface 12 of the refrigeration equipment controller U2 is connected with a return air temperature sensor TIN in series;
the refrigeration unit controller U2 monitors the return air temperature via the return air temperature sensor TIN after it has started operating.
In the A3, the value of the set time Tm1 is set according to different equipment and environment requirements;
in the compressor temperature control method, the value of the first set temperature T1 is set according to different equipment and environmental requirements;
in the hydraulic control of the cooling liquid, the values of the minimum pressure Pmin, the third set pressure P3, the second set pressure P2, the first set pressure P1 and the maximum pressure Pmax are set according to different equipment and environmental requirements.
The second set temperature T2 is set according to different equipment and environmental requirements.
Compared with the prior art, the invention has the beneficial effects that:
1. the power supply selection interface of the refrigeration equipment controller in the control method of the refrigerator control system is connected with the common end of an intermediate relay, a control coil of a first direct current contactor and a control coil of a second direct current contactor are connected in parallel and then connected to a normally closed contact of the intermediate relay, a control coil of an alternating current contactor is connected to a normally open contact of the intermediate relay, a control coil of the intermediate relay is connected to the output end of an alternating current plug, when the alternating current plug is electrified, the common end of the intermediate relay is connected with the normally closed contact, and a compressor is powered by a power grid; when the alternating current plug is not electrified, the public end of the intermediate relay is connected with the normally open contact, the compressor is powered by the power battery, and the two power supply modes can ensure that mutual influence is avoided. Therefore, the design controls the power supply mode of the refrigerator through the intermediate relay, the compressor is powered by a power grid when the alternating current plug is electrified, the compressor is powered by the power battery when the alternating current plug is not electrified, and the two power supply modes cannot influence each other.
2. In the control method of the cold machine control system, when the alternating current plug is not connected to the power grid, the cold storage device controller is powered by the storage battery; when the alternating current plug is connected into a city power grid, the voltage reduction rectification circuit converts the city power grid alternating current at the output end of the alternating current plug into available low-voltage direct current and outputs the low-voltage direct current to the upper power supply interface of the refrigeration equipment controller, and the refrigeration equipment controller supplies power as a control core, can be supplied with power by a storage battery and also can be supplied with power by the city power grid, so that the refrigeration equipment controller can be continuously supplied with power. Therefore, the refrigeration equipment controller in the design can be supplied with power by a storage battery and also can be supplied with power by an urban power grid, and the power supply of the refrigeration equipment controller is more guaranteed.
3. The refrigeration equipment controller in the control method of the refrigerator control system can control the temperature of the compressor by controlling the liquid spraying electromagnetic valve; the refrigeration equipment controller controls the first condenser fan and the second condenser fan to operate through a cooling liquid pressure signal monitored by the cooling liquid pressure sensor; the controller controls the defrosting solenoid valve to defrost through the evaporator temperature signal monitored by the defrosting temperature sensor, and controls the system operation mode according to the refrigerant pressure in the system, the evaporator temperature and the compressor temperature, so that the normal operation of the system can be effectively and safely ensured. Therefore, the refrigeration equipment controller in the design can effectively and safely ensure the normal operation of the system according to the pressure of the refrigerant in the system, the temperature of the evaporator and the temperature of the compressor to control the operation mode of the system.
4. According to the control method of the refrigerator control system, the control coil of the first direct current contactor is simultaneously connected with the control coil of the second direct current contactor and the solid state relay cooling fan in parallel, when the control coil of the first direct current contactor is simultaneously electrified with the control coil of the second direct current contactor, the first direct current contactor and the second direct current contactor are conducted, and simultaneously the solid state relay cooling fan is electrified and conducted to dissipate heat of the first direct current contactor and the second direct current contactor, so that the first direct current contactor and the second direct current contactor are prevented from being overhigh in temperature, and the system safety is high. Therefore, when the first direct current contactor and the second direct current contactor are switched on in the design, the solid state relay cooling fan is started and cools the direct current contactor, and the system safety is high.
Drawings
Fig. 1 is a schematic structural diagram of a chiller control system according to the present invention.
In the figure: temperature control panel U1, refrigeration equipment controller U2, frequency converter U3, compressor CP, automobile power battery U4, voltage reduction rectification circuit U5, alternating current plug PSR, intermediate relay KA, alternating current contactor KM, first direct current contactor KHV1, second direct current contactor KHV2, upper relay STR1, opening relay STR3, second condensation relay STR4, first condensation relay STR5, ignition switch IGN, storage battery power supply interface + XLV, upper power supply interface + SLV, first evaporator fan control interface 1, second evaporator fan control interface 2, first condenser fan control interface 3, second condenser fan control interface 4, defrosting signal output interface 5, power supply selection interface 6, temperature control interface 7, upper enable interface 8, low-voltage switch interface 9, evaporator temperature signal interface 11, return air temperature signal interface 12, negative electrode interface 13, second positive electrode interface 14, The system comprises a pressure signal input interface 15, a first positive electrode interface 16, a control signal interface 17, an enabling interface 18, a first evaporator fan ME1, a second evaporator fan ME2, a first condenser fan MC1, a second condenser fan MC2, a solid-state relay cooling fan MF1, a temperature switch TS, a liquid spraying electromagnetic valve BPVS, a defrosting electromagnetic valve DEVS, a cooling liquid pressure sensor HPS, a defrosting temperature sensor Tdef, a return air temperature sensor TIN, a low-voltage switch LP and a medium-voltage switch MP.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description of the invention.
Referring to fig. 1, a control method of a cold machine control system for a new energy automobile includes a refrigeration equipment controller U2, a frequency converter U3, a compressor CP, an automobile power battery U4, an ac plug PSR, an intermediate relay KA, an ac contactor KM, and a step-down rectification circuit U5;
a storage battery power supply interface + XLV of the refrigeration equipment controller U2 is electrically connected with a positive electrode of the storage battery;
the enabling interface 18 of the refrigeration equipment controller U2 is connected with the ignition switch IGN;
the anode of the automobile power battery U4 is connected with the anode of the DC input end of the frequency converter U3 after being connected with the first DC contactor KHV1 in series, the cathode of the automobile power battery U4 is connected with the cathode of the DC input end of the frequency converter U3 after being connected with the second DC contactor KHV2 in series,
the frequency converter U3 is electrically connected with the compressor CP, a three-phase alternating current input end of the frequency converter U3 is electrically connected with an alternating current plug PSR after being connected with an alternating current contactor KM in series, the alternating current plug PSR is electrically connected with an input end of a voltage reduction rectifying circuit U5, an output end of the voltage reduction rectifying circuit U5 is connected with an upper power supply interface + SLV of the refrigeration equipment controller U2, an output end of the voltage reduction rectifying circuit U5 is connected with an upper relay STR1 in series and then is connected with an upper enable interface 8 of the refrigeration equipment controller U2, and an upper power supply interface + SLV of the refrigeration equipment controller U2 is connected with a control coil of an upper relay STR1 in series and then is grounded;
The intermediate relay KA is a single-pole double-throw relay, a power supply selection interface 6 of the refrigeration equipment controller U2 is connected with the common end of the intermediate relay KA, a normally closed contact of the intermediate relay KA is connected with a control coil of a first direct current contactor KHV1 in series and then grounded, the control coil of the first direct current contactor KHV1 is connected with a control coil of a second direct current contactor KHV2 and a solid-state relay cooling fan MF1 in parallel, a normally open contact of the intermediate relay KA is connected with a control coil of an alternating current contactor KM in series and then grounded, and two ends of the control coil of the intermediate relay KA are respectively connected to two different phases of an alternating current plug PSR;
the control method of the cold machine control system for the new energy automobile comprises power supply control, wherein the power supply control comprises the following steps:
the cold machine for the new energy automobile is powered by an automobile power battery U4:
s1, supplying power to a refrigeration equipment controller U2 through a storage battery power supply interface + XLV, electrifying the refrigeration equipment controller U2, starting an ignition switch IGN, sending a high level to an enabling interface 18 of the refrigeration equipment controller U2 by the ignition switch IGN, activating the enabling interface 18 of the refrigeration equipment controller U2, and starting the refrigeration equipment controller U2 to work;
s2, after a refrigeration equipment controller U2 starts working, because a control coil of an intermediate relay KA is not powered, a common end of the intermediate relay KA is connected with a normally closed contact of the intermediate relay KA, a control coil of a direct current first direct current contactor KHV1, a control coil of a second direct current contactor KHV2 and a solid state relay cooling fan MF1 are connected with a power supply selection signal interface 6 of the refrigeration equipment controller U2, the power supply selection signal interface 6 of the refrigeration equipment controller U2 outputs high level to enable the control coil of the first direct current contactor KHV1, the control coil of the second direct current contactor KHV2 and the solid state relay cooling fan MF1 to be powered, so that the first direct current contactor KHV1 and the second direct current contactor KHV2 are closed, an automobile power battery U4 is a frequency converter U3 which supplies high voltage direct current, and a frequency converter U3 is used for supplying power to a compressor CP;
Meanwhile, the solid-state relay cooling fan MF1 starts to work to cool the first dc contactor KHV1 and the second dc contactor KHV 2;
the refrigerator for the new energy automobile is powered by an urban power grid:
s3, an alternating current plug PSR is connected to an urban power grid, a voltage reduction rectification circuit U5 connected to the alternating current plug PSR is powered on, the voltage reduction rectification circuit U5 converts the urban power grid alternating current at the output end of the alternating current plug PSR into usable low-voltage direct current and outputs the usable low-voltage direct current to an upper power supply interface + SLV of a refrigeration equipment controller U2, the refrigeration equipment controller U2 is powered on, at the moment, a control coil of an upper relay STR1 connected with the upper power supply interface + SLV is powered on, the upper relay STR1 is closed, an upper enable interface 8 of a refrigeration equipment controller U2 is connected with the output end of the voltage reduction rectification circuit U5 through an upper relay STR1, at the moment, the upper enable interface 8 is activated, and the refrigeration equipment controller U2 starts to work;
s4, after the refrigeration equipment controller U2 starts working, a control coil of an intermediate relay KA connected with an alternating current plug PSR is electrified, a common end of the intermediate relay KA is connected with a normally open contact of the intermediate relay KA, a control coil of an alternating current contactor KM is communicated with a power supply selection signal interface 6 of the refrigeration equipment controller U2, the power supply selection signal interface 6 of the refrigeration equipment controller U2 outputs high level to electrify the control coil of the alternating current contactor KM, the alternating current contactor (KM) is closed, a first direct current contactor KHV1 and a second direct current contactor KHV2 are disconnected, the alternating current plug PSR supplies power to a frequency converter U3, and the frequency converter U3 supplies power to a compressor CP.
A first positive electrode interface 16 of the refrigeration equipment controller U2 is electrically connected with a positive electrode terminal of a temperature control panel U1, a negative electrode terminal of the temperature control panel U1 is electrically connected with a negative electrode interface 13 of the refrigeration equipment controller U2, a control signal interface 17 of the refrigeration equipment controller U2 is in signal connection with a temperature control panel U1, and a temperature control interface 7 of the refrigeration equipment controller U2 is connected in series with a control coil of an open relay STR3 and then grounded;
the common end of the frequency converter U3 is connected in series with the enabling end of the frequency converter U3 after the relay STR3 is started;
a first evaporator fan control port 1 of the refrigeration equipment controller U2 is electrically connected with a first evaporator fan ME1, and a second evaporator fan control port 2 of the refrigeration equipment controller U2 is electrically connected with a second evaporator fan ME 2;
the control system of the refrigerator for the new energy automobile further comprises a first condensation relay STR5 and a second condensation relay STR4, wherein the first condensation relay STR5 and the second condensation relay STR4 are both single-pole double-throw relays, a second condenser fan control interface 4 of the refrigeration equipment controller U2 is connected with a common end of the second condensation relay STR4 after being connected with a second condenser fan MC2 in series, a normally open contact of the second condensation relay STR4 is grounded, a normally closed contact of the second condensation relay STR4 is electrically connected with a normally closed contact of the first condensation relay STR5, a normally open contact of the first condensation relay STR5 is connected with a first condenser fan control interface 3 of the refrigeration equipment controller U2, and a common end of the first condensation relay STR5 is connected with the first condenser fan MC1 in series and then grounded;
The method for controlling the refrigerator for the new energy automobile further comprises refrigerator power-on control, wherein the refrigerator power-on control comprises the following steps:
a1, after the refrigeration equipment controller U2 starts working, the refrigeration equipment controller U2 supplies power to a temperature control panel U1 through a first positive electrode interface 16, the temperature control panel U1 is powered on, and the temperature control panel U1 sends a control signal to a control signal interface 17 of the refrigeration equipment controller U2 to control the start and stop of the refrigeration equipment controller U2;
a2, after a refrigeration equipment controller U2 is started and starts to work, a second condenser fan control interface 4 of the refrigeration equipment controller U2 is sequentially connected with a first condenser fan MC1 and a second condenser fan MC2 in series and then grounded, and the second condenser fan control interface 4 of the refrigeration equipment controller U2 controls the first condenser fan MC1 and the second condenser fan MC2 to be started and work at a low speed;
meanwhile, a first evaporator fan control port 1 of the refrigeration equipment controller U2 controls a first evaporator fan ME1 to be started and operated, and a second evaporator fan control port 2 controls a second evaporator fan ME2 to be started and operated;
a3, after the first evaporator fan ME1, the second evaporator fan ME2, the first condenser fan MC1 and the second condenser fan MC2 work for a set time Tm1, the temperature control interface 7 of the refrigeration equipment controller U2 outputs high level to electrify a coil of a starting relay STR3 of the frequency converter U3, a contact of the starting relay STR3 is closed, an enabling end of the frequency converter U3 is activated, the frequency converter U3 works, and the frequency converter U3 controls the compressor CP to start working.
The temperature control interface 7 of the refrigeration equipment controller U2 is sequentially connected with a temperature switch TS and a liquid spraying electromagnetic valve BPVS in series and then grounded;
the cold machine control method for the new energy automobile further comprises compressor temperature control, wherein the compressor temperature control comprises the following steps:
after the compressor CP starts to work, when the temperature of the compressor CP exceeds a first set temperature T1, the temperature switch TS is closed, the temperature control interface 7 of the refrigeration equipment controller U2 is communicated with the liquid spraying electromagnetic valve BPVS, the liquid spraying electromagnetic valve BPVS is electrified and opened to cool the compressor CP, and the compressor CP is prevented from being overheated;
when the temperature of the compressor CP is lowered below the first set temperature T1, the temperature switch TS is turned off, and the liquid injection solenoid valve BPVS is de-energized to stop the operation.
The second positive interface 14 of the refrigeration equipment controller U2 is electrically connected with the positive terminal of the cooling liquid pressure sensor HPS, the negative terminal of the cooling liquid pressure sensor HPS is electrically connected with the negative interface 13 of the refrigeration equipment controller U2, and the pressure signal interface 15 of the refrigeration equipment controller U2 is in signal connection with the signal end of the cooling liquid pressure sensor HPS;
a low-voltage switch interface 9 of the refrigeration equipment controller U2 is connected with a low-voltage switch LP in series and then is grounded;
A temperature control interface 7 of the refrigeration equipment controller U2 is sequentially connected in series with a medium voltage switch MP and a control coil of a first condensation relay STR5, and then grounded, and a control coil of the first condensation relay STR5 is connected in parallel with a control coil of a second condensation relay STR 4;
the control method of the cold machine for the new energy automobile further comprises coolant hydraulic control, wherein the coolant hydraulic control comprises the following steps:
when the liquid spraying electromagnetic valve BPVS continuously works, the cooling liquid pressure sensor HPS detects the hydraulic pressure of the cooling liquid and sends a hydraulic signal of the cooling liquid to the refrigeration equipment controller U2;
when the hydraulic pressure of the cooling liquid is smaller than the minimum pressure Pmin, the low-pressure switch LP is disconnected, the refrigeration equipment controller U2 sends a low-pressure alarm signal to the temperature control panel U1 after detecting that the low-pressure switch LP is disconnected, and the temperature control panel U1 displays a cooling liquid low-pressure alarm;
when the refrigeration device controller U2 detects that the coolant hydraulic pressure is less than the third set pressure P3, the first condenser fan control interface 3 and the second condenser fan control interface 4 of the refrigeration device controller U2 control the first condenser fan MC1 and the second condenser fan MC2 to turn off;
when the refrigeration device controller U2 detects that the coolant pressure reaches the second set pressure P2, the first condenser fan control interface 3 and the second condenser fan control interface 4 of the refrigeration device controller U2 control the first condenser fan MC1 and the second condenser fan MC2 to be turned on;
When the hydraulic pressure of the cooling liquid reaches a first set pressure P1, the medium pressure switch MP is closed, the temperature control interface 7 of the refrigeration equipment controller U2 is simultaneously connected with the control coil of the first condensation relay STR5 and the control coil of the second condensation relay STR4, the temperature control interface 7 sends out high level to enable the control coil of the first condensation relay STR5 and the control coil of the second condensation relay STR4 to be electrified, the common end of the first condensation relay STR5 is connected with a normally open contact thereof, the common end of the second condensation relay STR4 is connected with the normally open contact thereof, at the moment, the second condenser fan control interface 4 of the refrigeration equipment controller U2 is connected with the second condenser fan MC2 in series and then grounded, the first condenser fan control interface 3 of the refrigeration equipment controller U2 is connected with the first condenser fan MC1 in series and then grounded, and the first condenser fan MC1 and the second condenser fan MC2 work at a high speed;
when the refrigeration equipment controller U2 detects that the hydraulic pressure of the cooling liquid exceeds the maximum pressure Pmax, the refrigeration equipment controller U2 sends a high-pressure alarm signal to the temperature control panel U1, and the temperature control panel U1 displays a cooling liquid high-pressure alarm;
the minimum pressure Pmin < the third set pressure P3 < the second set pressure P2 < the first set pressure P1 < the maximum pressure Pmax.
An evaporator temperature signal interface 11 of the refrigeration equipment controller U2 is grounded after being connected with a defrosting temperature sensor Tdef in series, and a defrosting signal output interface 5 of the refrigeration equipment controller U2 is grounded after being connected with a defrosting electromagnetic valve DEVS in series;
the cold machine control method for the new energy automobile further comprises an evaporator temperature control method, and the evaporator temperature control method comprises the following steps:
b1: the defrosting temperature sensor Tdef sends the acquired evaporator temperature signal to the refrigeration equipment controller U2, when the refrigeration equipment controller U2 detects that the temperature of the evaporator is lower than a second set temperature T2, the refrigeration equipment controller U2 sends a low-temperature alarm signal to the temperature control panel U1, and the temperature control panel U1 displays a defrosting prompt after receiving the low-temperature alarm signal;
b2: after the temperature control panel U1 receives the low-temperature alarm signal and displays the defrosting prompt, if the temperature control panel U1 receives the defrosting control signal input by an external operator, the temperature control panel U1 sends the defrosting signal to the refrigeration equipment controller U2; if the temperature control panel U1 does not receive the defrosting control signal input by an external operator, the temperature control panel U1 sends a defrosting signal to the refrigeration equipment controller U2 at regular time;
after the refrigeration equipment controller U2 receives the defrosting signal, the defrosting signal output interface 5 of the refrigeration equipment controller U2 sends a high level to the defrosting solenoid valve DEVS, and the defrosting solenoid valve DEVS is activated to defrost.
The return air temperature signal interface 12 of the refrigeration equipment controller U2 is connected with a return air temperature sensor TIN in series;
the refrigeration unit controller U2 monitors the return air temperature via the return air temperature sensor TIN after it has started operating.
In the A3, the value of the set time Tm1 is set according to different equipment and environment requirements;
in the compressor temperature control method, the value of the first set temperature T1 is set according to different equipment and environmental requirements;
in the hydraulic control of the cooling liquid, the values of the minimum pressure Pmin, the third set pressure P3, the second set pressure P2, the first set pressure P1 and the maximum pressure Pmax are set according to different equipment and environmental requirements.
The second set temperature T2 is set according to different equipment and environmental requirements.
The principle of the invention is illustrated as follows:
the temperature switch TS is a temperature control switch, is controlled by the temperature of the compressor and is automatically closed when the temperature of the compressor exceeds the range;
the low-pressure switch LP is a normally closed switch controlled by cooling liquid pressure, and is automatically disconnected when the cooling liquid pressure is lower than a certain pressure value (for example, 0.05 MPa);
the medium-pressure switch MP is a normally open switch controlled by cooling hydraulic pressure, and is automatically closed when the cooling hydraulic pressure is higher than a certain pressure value (e.g., 2 MPa).
The upper relay STR1, the opening relay STR3, the alternating current contactor KM, the first direct current contactor KHV1 and the second direct current contactor KHV2 are all normally open relays.
The temperature control panel U1 is used for man-machine interaction and is convenient for personnel to operate, the model of the temperature control panel U1 is WD-02L, the model of the refrigeration equipment controller U2 is MD310-AC380V, and the model of the frequency converter is MD310-AC 380V.
The setting of the set time Tm1, the set values of the first set temperature T1 and the second set temperature T2, and the values of the minimum pressure Pmin, the third set pressure P3, the second set pressure P2, the first set pressure P2, and the maximum pressure Pmax in the coolant hydraulic control are affected by the vehicle type of the cold-chain vehicle, the cold-chain vehicle cooling equipment capacity, the outdoor temperature, and the cooling equipment model factor.
Example 1:
a control method of a cold machine control system for a new energy automobile comprises a refrigeration equipment controller U2, a frequency converter U3, a compressor CP, an automobile power battery U4, an alternating current plug PSR, an intermediate relay KA, an alternating current contactor KM and a voltage reduction rectification circuit U5;
the storage battery power supply interface + XLV of the refrigeration equipment controller U2 is electrically connected with the positive electrode of the storage battery;
The enabling interface 18 of the refrigeration equipment controller U2 is connected with the ignition switch IGN;
the anode of the automobile power battery U4 is connected with the anode of the DC input end of the frequency converter U3 after being connected with the first DC contactor KHV1 in series, the cathode of the automobile power battery U4 is connected with the cathode of the DC input end of the frequency converter U3 after being connected with the second DC contactor KHV2 in series,
the frequency converter U3 is electrically connected with the compressor CP, a three-phase alternating current input end of the frequency converter U3 is electrically connected with an alternating current plug PSR after being connected with an alternating current contactor KM in series, the alternating current plug PSR is electrically connected with an input end of a voltage reduction rectifying circuit U5, an output end of the voltage reduction rectifying circuit U5 is connected with an upper power supply interface + SLV of the refrigeration equipment controller U2, an output end of the voltage reduction rectifying circuit U5 is connected with an upper relay STR1 in series and then is connected with an upper enable interface 8 of the refrigeration equipment controller U2, and an upper power supply interface + SLV of the refrigeration equipment controller U2 is connected with a control coil of an upper relay STR1 in series and then is grounded;
the intermediate relay KA is a single-pole double-throw relay, a power supply selection interface 6 of the refrigeration equipment controller U2 is connected with the common end of the intermediate relay KA, a normally closed contact of the intermediate relay KA is connected with a control coil of a first direct current contactor KHV1 in series and then grounded, the control coil of the first direct current contactor KHV1 is connected with a control coil of a second direct current contactor KHV2 and a solid-state relay cooling fan MF1 in parallel, a normally open contact of the intermediate relay KA is connected with a control coil of an alternating current contactor KM in series and then grounded, and two ends of the control coil of the intermediate relay KA are respectively connected to two different phases of an alternating current plug PSR;
The control method of the cold machine control system for the new energy automobile comprises power supply control, wherein the power supply control comprises the following steps:
the cold machine for the new energy automobile is powered by an automobile power battery U4:
s1, supplying power to a refrigeration equipment controller U2 through a storage battery power supply interface + XLV, electrifying the refrigeration equipment controller U2, starting an ignition switch IGN, sending a high level to an enabling interface 18 of the refrigeration equipment controller U2 by the ignition switch IGN, activating the enabling interface 18 of the refrigeration equipment controller U2, and starting the refrigeration equipment controller U2 to work;
s2, after a refrigeration equipment controller U2 starts working, because a control coil of an intermediate relay KA is not powered, a common end of the intermediate relay KA is connected with a normally closed contact of the intermediate relay KA, a control coil of a direct current first direct current contactor KHV1, a control coil of a second direct current contactor KHV2 and a solid state relay cooling fan MF1 are connected with a power supply selection signal interface 6 of the refrigeration equipment controller U2, the power supply selection signal interface 6 of the refrigeration equipment controller U2 outputs high level to enable the control coil of the first direct current contactor KHV1, the control coil of the second direct current contactor KHV2 and the solid state relay cooling fan MF1 to be powered, so that the first direct current contactor KHV1 and the second direct current contactor KHV2 are closed, an automobile power battery U4 is a frequency converter U3 which supplies high voltage direct current, and a frequency converter U3 is used for supplying power to a compressor CP;
Meanwhile, the solid-state relay cooling fan MF1 starts to work to cool the first dc contactor KHV1 and the second dc contactor KHV 2;
the refrigerator for the new energy automobile is powered by an urban power grid:
s3, an alternating current plug PSR is connected to an urban power grid, a voltage reduction rectification circuit U5 connected to the alternating current plug PSR is powered on, the voltage reduction rectification circuit U5 converts the urban power grid alternating current at the output end of the alternating current plug PSR into usable low-voltage direct current and outputs the usable low-voltage direct current to an upper power supply interface + SLV of a refrigeration equipment controller U2, the refrigeration equipment controller U2 is powered on, at the moment, a control coil of an upper relay STR1 connected with the upper power supply interface + SLV is powered on, the upper relay STR1 is closed, an upper enable interface 8 of a refrigeration equipment controller U2 is connected with the output end of the voltage reduction rectification circuit U5 through an upper relay STR1, at the moment, the upper enable interface 8 is activated, and the refrigeration equipment controller U2 starts to work;
and S4, after the refrigeration equipment controller U2 starts working, a control coil of an intermediate relay KA connected with an alternating current plug PSR is electrified, a common end of the intermediate relay KA is connected with a normally open contact of the intermediate relay KA, a control coil of an alternating current contactor KM is communicated with a power supply selection signal interface 6 of the refrigeration equipment controller U2, the power supply selection signal interface 6 of the refrigeration equipment controller U2 outputs high level to electrify the control coil of the alternating current contactor KM, the alternating current contactor KM is closed, the alternating current plug PSR supplies power to a frequency converter U3, and the frequency converter U3 supplies power to the compressor CP.
Example 2:
example 2 is substantially the same as example 1 except that:
a first positive electrode interface 16 of the refrigeration equipment controller U2 is electrically connected with a positive electrode terminal of a temperature control panel U1, a negative electrode terminal of the temperature control panel U1 is electrically connected with a negative electrode interface 13 of a refrigeration equipment controller U2, a control signal interface 17 of the refrigeration equipment controller U2 is in signal connection with a temperature control panel U1, and a temperature control interface 7 of the refrigeration equipment controller U2 is connected in series with a control coil of a starting relay STR3 and then grounded;
the common end of the frequency converter U3 is connected in series with the enabling end of the frequency converter U3 after the relay STR3 is started;
a first evaporator fan control port 1 of the refrigeration equipment controller U2 is electrically connected with a first evaporator fan ME1, and a second evaporator fan control port 2 of the refrigeration equipment controller U2 is electrically connected with a second evaporator fan ME 2;
the control system of the refrigerator for the new energy automobile further comprises a first condensation relay STR5 and a second condensation relay STR4, wherein the first condensation relay STR5 and the second condensation relay STR4 are both single-pole double-throw relays, a second condenser fan control interface 4 of the refrigeration equipment controller U2 is connected with a common end of the second condensation relay STR4 after being connected with a second condenser fan MC2 in series, a normally open contact of the second condensation relay STR4 is grounded, a normally closed contact of the second condensation relay STR4 is connected with a normally closed contact of the first condensation relay STR5, a normally open contact of the first condensation relay STR5 is connected with a first condenser fan control interface 3 of the refrigeration equipment controller U2, and a common end of the first condensation relay STR5 is connected with the first condenser fan MC1 in series and then grounded;
The method for controlling the refrigerator for the new energy automobile further comprises refrigerator power-on control, wherein the refrigerator power-on control comprises the following steps:
a1, after the refrigeration equipment controller U2 starts working, the refrigeration equipment controller U2 supplies power to a temperature control panel U1 through a first positive electrode interface 16, the temperature control panel U1 is powered on, and the temperature control panel U1 sends a control signal to a control signal interface 17 of the refrigeration equipment controller U2 to control the start and stop of the refrigeration equipment controller U2;
a2, after a refrigeration equipment controller U2 is started and starts to work, a second condenser fan control interface 4 of the refrigeration equipment controller U2 is sequentially connected with a first condenser fan MC1 and a second condenser fan MC2 in series and then grounded, and the second condenser fan control interface 4 of the refrigeration equipment controller U2 controls the first condenser fan MC1 and the second condenser fan MC2 to be started and work at a low speed;
meanwhile, a first evaporator fan control port 1 of the refrigeration equipment controller U2 controls a first evaporator fan ME1 to be started and operated, and a second evaporator fan control port 2 controls a second evaporator fan ME2 to be started and operated;
a3, after the first evaporator fan ME1, the second evaporator fan ME2, the first condenser fan MC1 and the second condenser fan MC2 work for a set time Tm1, the temperature control interface 7 of the refrigeration equipment controller U2 outputs high level to electrify a coil of a starting relay STR3 of the frequency converter U3, a contact of the starting relay STR3 is closed, an enabling end of the frequency converter U3 is activated, the frequency converter U3 works, and the frequency converter U3 controls the compressor CP to start working.
Example 3:
example 3 is substantially the same as example 2 except that:
the cold machine control method for the new energy automobile further comprises compressor temperature control, wherein the compressor temperature control comprises the following steps:
the temperature control interface 7 of the refrigeration equipment controller U2 is sequentially connected with a temperature switch TS and a liquid spraying electromagnetic valve BPVS in series and then grounded; the second positive electrode interface 14 of the refrigerating equipment controller U2 is electrically connected with the positive electrode terminal of the cooling liquid pressure sensor HPS, the negative electrode terminal of the cooling liquid pressure sensor HPS is electrically connected with the negative electrode interface 13 of the refrigerating equipment controller U2, and the pressure signal interface 15 of the refrigerating equipment controller U2 is in signal connection with the signal end of the cooling liquid pressure sensor HPS; a low-voltage switch interface 9 of the refrigeration equipment controller U2 is connected with a low-voltage switch LP in series and then is grounded; a temperature control interface 7 of the refrigeration equipment controller U2 is sequentially connected in series with a medium-voltage switch MP and a control coil of a first condensation relay STR5 and then grounded, and a control coil of the first condensation relay STR5 is connected in parallel with a control coil of a second condensation relay STR 4;
the control method of the cold machine for the new energy automobile further comprises compressor temperature control and cooling liquid hydraulic control, wherein the compressor temperature control and the cooling liquid hydraulic control comprise the following steps:
After the compressor CP starts to work, when the temperature of the compressor CP exceeds a first set temperature T1, the temperature switch TS is closed, the temperature control interface 7 of the refrigeration equipment controller U2 is communicated with the liquid spraying electromagnetic valve BPVS, the liquid spraying electromagnetic valve BPVS is electrified and opened to cool the compressor CP, and the compressor CP is prevented from being overheated;
when the temperature of the compressor CP is reduced to be below a first set temperature T1, the temperature switch TS is switched off, and the liquid spraying electromagnetic valve BPVS is switched off to stop working;
when the liquid spraying solenoid valve BPVS works continuously, the cooling liquid pressure sensor HPS detects the hydraulic pressure of the cooling liquid and sends a hydraulic signal of the cooling liquid to the refrigeration equipment controller U2;
when the hydraulic pressure of the cooling liquid is less than the minimum pressure of 0.05Mpa, the low-pressure switch LP is switched off, the refrigeration equipment controller U2 sends a low-pressure alarm signal to the temperature control panel U1 after detecting that the low-pressure switch LP is switched off, and the temperature control panel U1 displays a cooling liquid low-pressure alarm;
when the refrigeration equipment controller U2 detects that the hydraulic pressure of the cooling liquid is less than the third set pressure of 1.4Mpa, the first condenser fan control interface 3 and the second condenser fan control interface 4 of the refrigeration equipment controller U2 control the first condenser fan MC1 and the second condenser fan MC2 to be closed;
when the refrigeration equipment controller U2 detects that the hydraulic pressure of the cooling liquid reaches the second set pressure of 2Mpa, the first condenser fan control interface 3 and the second condenser fan control interface 4 of the refrigeration equipment controller U2 control the opening of the first condenser fan MC1 and the second condenser fan MC 2;
When the hydraulic pressure of the cooling liquid reaches a first set pressure of 5Mpa, the medium-pressure switch MP is closed, the temperature control interface 7 of the refrigeration equipment controller U2 is simultaneously connected with the control coil of the first condensation relay STR5 and the control coil of the second condensation relay STR4, the temperature control interface 7 sends out high level to enable the control coil of the first condensation relay STR5 and the control coil of the second condensation relay STR4 to be electrified, the common end of the first condensation relay STR5 is connected with a normally open contact thereof, the common end of the second condensation relay STR4 is connected with the normally open contact thereof, at the moment, the second condenser fan control interface 4 of the refrigeration equipment controller U2 is connected with the second condenser fan MC2 in series and then grounded, the first condenser fan control interface 3 of the refrigeration equipment controller U2 is connected with the first condenser fan MC1 in series and then grounded, and the first condenser fan MC1 and the second condenser fan MC2 work at a high speed;
when the refrigeration equipment controller U2 detects that the liquid pressure of the cooling liquid exceeds the maximum pressure of 20Mpa, the refrigeration equipment controller U2 sends a high-pressure alarm signal to the temperature control panel U1, and the temperature control panel U1 displays a warning of the high pressure of the cooling liquid.
Example 4:
example 4 is essentially the same as example 3, except that:
An evaporator temperature signal interface 11 of the refrigeration equipment controller U2 is grounded after being connected with a defrosting temperature sensor Tdef in series, and a defrosting signal output interface 5 of the refrigeration equipment controller U2 is grounded after being connected with a defrosting electromagnetic valve DEVS in series;
the cold machine control method for the new energy automobile further comprises an evaporator temperature control method, and the evaporator temperature control method comprises the following steps:
b1: the defrosting temperature sensor Tdef sends the acquired evaporator temperature signal to the refrigeration equipment controller U2, when the refrigeration equipment controller U2 detects that the temperature of the evaporator is lower than a second set temperature of-20 ℃, the refrigeration equipment controller U2 sends a low-temperature alarm signal to the temperature control panel U1, and the temperature control panel U1 displays a defrosting prompt after receiving the low-temperature alarm signal;
b2: after the temperature control panel U1 receives the low-temperature alarm signal and displays the defrosting prompt, if the temperature control panel U1 receives the defrosting control signal input by an external operator, the temperature control panel U1 sends the defrosting signal to the refrigeration equipment controller U2; if the temperature control panel U1 does not receive the defrosting control signal input by an external operator, the temperature control panel U1 sends a defrosting signal to the refrigeration equipment controller U2 at regular time;
after the refrigeration equipment controller U2 receives the defrosting signal, the defrosting signal output interface 5 of the refrigeration equipment controller U2 sends an electric signal to the defrosting solenoid valve DEVS, and the defrosting solenoid valve DEVS is started to defrost;
The return air temperature signal interface 12 of the refrigeration equipment controller U2 is connected with a return air temperature sensor TIN in series;
the refrigeration unit controller U2 monitors the return air temperature via the return air temperature sensor TIN after it has started operating.

Claims (8)

1. A control method of a cold machine control system for a new energy automobile is characterized by comprising the following steps:
the control system of the refrigerator for the new energy automobile comprises a refrigeration equipment controller (U2), a frequency converter (U3), a Compressor (CP), an automobile power battery (U4), an alternating current Plug (PSR), an intermediate relay (KA), an alternating current contactor (KM) and a voltage reduction rectification circuit (U5);
a storage battery power supply interface (+ XLV) of the refrigeration equipment controller (U2) is electrically connected with a positive electrode of the storage battery;
the enabling interface (18) of the refrigeration equipment controller (U2) is connected with an ignition switch (IGN);
the positive electrode of the automobile power battery (U4) is connected with the positive electrode of the direct current input end of the frequency converter (U3) after being connected with the first direct current contactor (KHV 1) in series, and the negative electrode of the automobile power battery (U4) is connected with the negative electrode of the direct current input end of the frequency converter (U3) after being connected with the second direct current contactor (KHV 2) in series;
the frequency converter (U3) is electrically connected with the Compressor (CP), a three-phase alternating current input end of the frequency converter (U3) is electrically connected with an alternating current Plug (PSR) after being connected with an alternating current contactor (KM) in series, the alternating current Plug (PSR) is electrically connected with an input end of a voltage reduction rectifying circuit (U5), an output end of the voltage reduction rectifying circuit (U5) is connected with an upper power supply interface (+ SLV) of the refrigeration equipment controller (U2), an output end of the voltage reduction rectifying circuit (U5) is connected with an upper relay (STR 1) in series and then connected with an upper enable interface (8) of the refrigeration equipment controller (U2), and the upper power supply interface (+ SLV) of the refrigeration equipment controller (U2) is grounded after being connected with a control coil of the upper relay (STR 1) in series;
The intermediate relay (KA) is a single-pole double-throw relay, a power supply selection interface 6 of the refrigeration equipment controller (U2) is connected with the common end of the intermediate relay (KA), a normally closed contact of the intermediate relay (KA) is connected with a control coil of a first direct current contactor (KHV 1) in series and then grounded, the control coil of the first direct current contactor (KHV 1) is connected with a control coil of a second direct current contactor (KHV 2) and a solid-state relay cooling fan (MF 1) in parallel, a normally open contact of the intermediate relay (KA) is connected with a control coil of an alternating current contactor (KM) in series and then grounded, and two ends of the control coil of the intermediate relay (KA) are connected to two different phases of an alternating current Plug (PSR) respectively;
the control method of the cold machine control system for the new energy automobile comprises power supply control, wherein the power supply control comprises the following steps:
the cold machine for the new energy automobile is powered by an automobile power battery (U4):
s1, supplying power to a refrigeration equipment controller (U2) through a storage battery power supply interface (+ XLV), electrifying the refrigeration equipment controller (U2), starting an ignition switch (IGN), sending a high level to an enabling interface (18) of the refrigeration equipment controller (U2) by the ignition switch (IGN), activating the enabling interface (18) of the refrigeration equipment controller (U2), and starting the refrigeration equipment controller (U2) to work;
S2, after the refrigeration equipment controller (U2) starts to work, because the control coil of the intermediate relay (KA) is not electrified, the common end of the intermediate relay (KA) is connected with the normally closed contact of the intermediate relay (KA), the control coil of the first direct current contactor (KHV 1), the control coil of the second direct current contactor (KHV 2) and the solid state relay cooling fan (MF 1) are all connected with the power supply selection signal interface (6) of the refrigeration equipment controller (U2), the power supply selection signal interface (6) of the refrigeration equipment controller (U2) outputs high level to enable the control coil of the first direct current contactor (KHV 1), the control coil of the second direct current contactor (KHV 2) and the solid state relay cooling fan (MF 1) to be electrified, further enable the first direct current contactor (KHV 1) and the second direct current contactor (KHV 2) to be closed, and the automobile power battery (U4) is high-voltage direct current power for the frequency converter (U3), the frequency converter (U3) supplies power to the Compressor (CP);
meanwhile, the solid-state relay cooling fan (MF 1) starts to work to cool the first direct current contactor (KHV 1) and the second direct current contactor (KHV 2);
the refrigerator for the new energy automobile is powered by an urban power grid:
s3, connecting an alternating current Plug (PSR) into an urban power grid, electrifying a voltage reduction rectifying circuit (U5) connected to the alternating current Plug (PSR), converting the urban power grid alternating current output by the alternating current Plug (PSR) into available low-voltage direct current by the voltage reduction rectifying circuit (U5) and outputting the available low-voltage direct current to an upper power supply interface (+ SLV) of a refrigeration equipment controller (U2), electrifying the refrigeration equipment controller (U2), electrifying a control coil of an upper relay (STR 1) connected with the upper power supply interface (+ SLV) at the moment, closing the upper relay (STR 1), connecting an upper enable interface (8) of the refrigeration equipment controller (U2) with the output end of the voltage reduction rectifying circuit (U5) through the upper relay (STR 1), activating the upper enable interface (8) at the moment, and starting the refrigeration equipment controller (U2);
And S4, after the refrigeration equipment controller (U2) starts to work, a control coil of an intermediate relay (KA) connected with an alternating current Plug (PSR) is electrified, a common end of the intermediate relay (KA) is connected with a normally open contact of the intermediate relay (KA), a control coil of an alternating current contactor (KM) is communicated with a power supply selection signal interface (6) of the refrigeration equipment controller (U2), the power supply selection signal interface (6) of the refrigeration equipment controller (U2) outputs a high level to electrify the control coil of the alternating current contactor (KM), the alternating current contactor (KM) is closed, a first direct current contactor (KHV 1) and a second direct current contactor (KHV 2) are disconnected, the alternating current Plug (PSR) supplies power to a frequency converter (U3), and the frequency converter (U3) supplies power to a Compressor (CP).
2. The control method of the chiller control system for the new energy automobile according to claim 1, characterized in that:
a first positive electrode interface (16) of the refrigeration equipment controller (U2) is electrically connected with a positive electrode terminal of a temperature control panel (U1), a negative electrode terminal of the temperature control panel (U1) is electrically connected with a negative electrode interface (13) of the refrigeration equipment controller (U2), a control signal interface (17) of the refrigeration equipment controller (U2) is in signal connection with the temperature control panel (U1), and a temperature control interface (7) of the refrigeration equipment controller (U2) is grounded after being connected in series with a control coil of an open relay (STR 3);
The common end of the frequency converter (U3) is connected in series with the enabling end of the frequency converter (U3) after the relay (STR 3) is opened;
a first evaporator fan control port (1) of the refrigeration equipment controller (U2) is electrically connected with a first evaporator fan (ME 1), and a second evaporator fan control port (2) of the refrigeration equipment controller (U2) is electrically connected with a second evaporator fan (ME 2);
the control system of the refrigerator for the new energy automobile further comprises a first condensation relay (STR 5) and a second condensation relay (STR 4), the first condensation relay (STR 5) and the second condensation relay (STR 4) are both single-pole double-throw relays, a second condenser fan control interface (4) of the refrigeration equipment controller (U2) is connected in series with a second condenser fan (MC 2) and then is connected with the common end of a second condensation relay (STR 4), the normally open contact of the second condensation relay (STR 4) is grounded, the normally closed contact of the second condensation relay (STR 4) is electrically connected with the normally closed contact of the first condensation relay (STR 5), a normally open contact of the first condensation relay (STR 5) is connected with a first condenser fan control interface (3) of a refrigeration equipment controller (U2), and a common end of the first condensation relay (STR 5) is connected with a first condenser fan (MC 1) in series and then is grounded;
The method for controlling the refrigerator for the new energy automobile further comprises refrigerator power-on control, wherein the refrigerator power-on control comprises the following steps:
a1, after the refrigeration equipment controller (U2) starts to work, the refrigeration equipment controller (U2) supplies power to a temperature control panel (U1) through a first positive electrode interface (16), the temperature control panel (U1) is powered on, and the temperature control panel (U1) sends a control signal to a control signal interface (17) of the refrigeration equipment controller (U2) to control the start and stop of the refrigeration equipment controller (U2);
a2, after a refrigeration equipment controller (U2) is started and starts to work, a second condenser fan control interface (4) of the refrigeration equipment controller (U2) is sequentially connected with a first condenser fan (MC 1) and a second condenser fan (MC 2) in series and then grounded, and the second condenser fan control interface (4) of the refrigeration equipment controller (U2) controls the first condenser fan (MC 1) and the second condenser fan (MC 2) to be started and work at a low speed;
meanwhile, a first evaporator fan control port (1) of the refrigeration equipment controller (U2) controls a first evaporator fan (ME 1) to be started and operated, and a second evaporator fan control port (2) controls a second evaporator fan (ME 2) to be started and operated;
A3, after a first evaporator fan (ME 1), a second evaporator fan (ME 2), a first condenser fan (MC 1) and a second condenser fan (MC 2) work for a set time Tm1, a temperature control interface (7) of a refrigeration equipment controller (U2) outputs a high level to electrify a coil of a starting relay (STR 3) of an inverter (U3), a contact of the starting relay (STR 3) is closed, an enabling end of the inverter (U3) is activated, the inverter (U3) works, and the inverter (U3) controls a Compressor (CP) to start working.
3. The control method of the cold machine control system for the new energy automobile according to claim 2, characterized in that:
a temperature control interface (7) of the refrigeration equipment controller (U2) is sequentially connected with a Temperature Switch (TS) and a liquid spraying electromagnetic valve (BPVS) in series and then grounded;
the cold machine control method for the new energy automobile further comprises compressor temperature control, wherein the compressor temperature control comprises the following steps:
after the Compressor (CP) starts to work, when the temperature of the Compressor (CP) exceeds a first set temperature T1, the Temperature Switch (TS) is closed, the temperature control interface (7) of the refrigeration equipment controller (U2) is communicated with the liquid spraying electromagnetic valve (BPVS), the liquid spraying electromagnetic valve (BPVS) is electrified and opened, the Compressor (CP) is cooled, and the Compressor (CP) is prevented from being overheated;
When the temperature of the Compressor (CP) is reduced below a first set temperature T1, the Temperature Switch (TS) is turned off, and the liquid injection solenoid valve (BPVS) is powered off and stops working.
4. The control method of the chiller control system for the new energy automobile according to claim 3, wherein the control method comprises the following steps:
a second positive electrode interface (14) of the refrigeration equipment controller (U2) is electrically connected with a positive electrode terminal of a cooling liquid pressure sensor (HPS), a negative electrode terminal of the cooling liquid pressure sensor (HPS) is electrically connected with a negative electrode interface (13) of the refrigeration equipment controller (U2), and a pressure signal interface (15) of the refrigeration equipment controller (U2) is in signal connection with a signal end of the cooling liquid pressure sensor (HPS);
a low-voltage switch interface (9) of the refrigeration equipment controller (U2) is connected with a low-voltage switch (LP) in series and then is grounded;
a temperature control interface (7) of the refrigeration equipment controller (U2) is sequentially connected with a medium voltage switch (MP) and a control coil of a first condensation relay (STR 5) in series and then is grounded, and the control coil of the first condensation relay (STR 5) is connected with a control coil of a second condensation relay (STR 4) in parallel;
the control method of the cold machine for the new energy automobile further comprises hydraulic control of cooling liquid, wherein the hydraulic control of the cooling liquid comprises the following steps:
When the liquid spraying solenoid valve (BPVS) works continuously, the cooling liquid pressure sensor (HPS) detects the hydraulic pressure of the cooling liquid and sends a cooling liquid hydraulic signal to the refrigeration equipment controller (U2);
when the hydraulic pressure of the cooling liquid is smaller than the minimum pressure Pmin, the low-pressure switch (LP) is disconnected, the refrigeration equipment controller (U2) sends a low-pressure alarm signal to the temperature control panel (U1) after detecting that the low-pressure switch (LP) is disconnected, and the temperature control panel (U1) displays a warning of the low pressure of the cooling liquid;
when the refrigeration equipment controller (U2) detects that the hydraulic pressure of the cooling liquid is smaller than a third set pressure P3, a first condenser fan control interface (3) and a second condenser fan control interface (4) of the refrigeration equipment controller (U2) control a first condenser fan (MC 1) and a second condenser fan (MC 2) to be closed;
when the refrigerating equipment controller (U2) detects that the hydraulic pressure of the cooling liquid reaches a second set pressure P2, a first condenser fan control interface (3) and a second condenser fan control interface (4) of the refrigerating equipment controller (U2) control a first condenser fan (MC 1) and a second condenser fan (MC 2) to be started;
when the hydraulic pressure of the cooling liquid reaches a first set pressure P1, a medium-pressure switch (MP) is closed, a temperature control interface (7) of a refrigeration equipment controller (U2) is simultaneously connected with a control coil of a first condensation relay (STR 5) and a control coil of a second condensation relay (STR 4), the temperature control interface (7) sends out high level to enable the control coil of the first condensation relay (STR 5) and the control coil of the second condensation relay (STR 4) to be electrified, so that the common end of the first condensation relay (STR 5) is connected with a normally open contact, the common end of the second condensation relay (STR 4) is connected with the normally open contact, at the moment, a second condenser fan control interface (4) of the refrigeration equipment controller (U2) is connected with a second condenser fan (MC 2) in series and then grounded, a first condenser fan control interface (3) of the refrigeration equipment controller (U2) is connected with a first condenser fan (MC 1) in series and then grounded, the first condenser fan (MC 1) and the second condenser fan (MC 2) work at high speed;
When the refrigeration equipment controller (U2) detects that the hydraulic pressure of the cooling liquid exceeds the maximum pressure Pmax, the refrigeration equipment controller (U2) sends a high-pressure alarm signal to the temperature control panel (U1), and the temperature control panel (U1) displays a warning of the high pressure of the cooling liquid;
the minimum pressure Pmin < the third set pressure P3 < the second set pressure P2 < the first set pressure P1 < the maximum pressure Pmax.
5. The control method of the cold machine control system for the new energy automobile according to claim 2, 3 or 4, characterized in that:
an evaporator temperature signal interface (11) of the refrigeration equipment controller (U2) is grounded after being connected with a defrosting temperature sensor (Tdef) in series, and a defrosting signal output interface (5) of the refrigeration equipment controller (U2) is grounded after being connected with a Defrosting Electromagnetic Valve (DEVS) in series;
the cold machine control method for the new energy automobile further comprises an evaporator temperature control method, and the evaporator temperature control method comprises the following steps:
b1: the defrosting temperature sensor (Tdef) sends the acquired evaporator temperature signal to the refrigeration equipment controller (U2), when the refrigeration equipment controller (U2) detects that the temperature of the evaporator is lower than a second set temperature T2, the refrigeration equipment controller (U2) sends a low-temperature alarm signal to the temperature control panel (U1), and the temperature control panel (U1) displays a defrosting prompt after receiving the low-temperature alarm signal;
B2: after the temperature control panel (U1) receives the low-temperature alarm signal and displays the defrosting prompt, if the temperature control panel (U1) receives a defrosting control signal input by an external operator, the temperature control panel (U1) sends a defrosting signal to the refrigeration equipment controller (U2); if the temperature control panel (U1) does not receive the defrosting control signal input by an external operator, the temperature control panel (U1) sends the defrosting signal to the refrigeration equipment controller (U2) at regular time;
after the refrigerating equipment controller (U2) receives the defrosting signal, a defrosting signal output interface (5) of the refrigerating equipment controller (U2) sends high level to the defrosting solenoid valve (DEVS), and the defrosting solenoid valve (DEVS) is started to defrost.
6. The control method of the control system of the refrigerator for the new energy automobile according to claim 5, characterized in that:
a return air temperature signal interface (12) of the refrigeration equipment controller (U2) is connected with a return air temperature sensor (TIN) in series and then is grounded;
the refrigeration unit controller (U2) monitors the return air temperature via a return air temperature sensor (TIN) after it has started operating.
7. The control method of the control system of the refrigerator for the new energy automobile according to claim 4, characterized in that:
In the A3, the value of the set time Tm1 is set according to different equipment and environmental requirements;
in the compressor temperature control method, the value of the first set temperature T1 is set according to different equipment and environmental requirements;
in the hydraulic control of the cooling liquid, the values of the minimum pressure Pmin, the third set pressure P3, the second set pressure P2, the first set pressure P1 and the maximum pressure Pmax are set according to different equipment and environmental requirements.
8. The control method of the control system of the refrigerator for the new energy automobile according to claim 5, characterized in that:
the second set temperature T2 is set according to different equipment and environmental requirements.
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CN113665362B (en) * 2021-08-17 2023-07-21 东风汽车股份有限公司 Control method of power-on and power-off control system of pure electric vehicle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201690268U (en) * 2010-06-07 2010-12-29 哈尔滨卓尔科技有限公司 Wind-light complementary control inverter for cool house
KR101716456B1 (en) * 2016-03-31 2017-03-14 재단법인 자동차융합기술원 Power feed system for refrigerator truck
CN106655473A (en) * 2017-01-16 2017-05-10 广东美的制冷设备有限公司 Electrical control system and method suitable for air conditioner of refrigerator car
CN207028771U (en) * 2017-06-21 2018-02-23 山东通盛制冷设备有限公司 A kind of pure electric vehicle refrigeration, electric power supply control system
CN108202575A (en) * 2016-12-16 2018-06-26 比亚迪股份有限公司 A kind of electronic refrigerator car electric power system and its control method, electronic refrigerator car
CN208498178U (en) * 2018-07-31 2019-02-15 厦门金龙汽车空调有限公司 A kind of automobile-used solar energy electric air-conditioner control system of engineering

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201690268U (en) * 2010-06-07 2010-12-29 哈尔滨卓尔科技有限公司 Wind-light complementary control inverter for cool house
KR101716456B1 (en) * 2016-03-31 2017-03-14 재단법인 자동차융합기술원 Power feed system for refrigerator truck
CN108202575A (en) * 2016-12-16 2018-06-26 比亚迪股份有限公司 A kind of electronic refrigerator car electric power system and its control method, electronic refrigerator car
CN106655473A (en) * 2017-01-16 2017-05-10 广东美的制冷设备有限公司 Electrical control system and method suitable for air conditioner of refrigerator car
CN207028771U (en) * 2017-06-21 2018-02-23 山东通盛制冷设备有限公司 A kind of pure electric vehicle refrigeration, electric power supply control system
CN208498178U (en) * 2018-07-31 2019-02-15 厦门金龙汽车空调有限公司 A kind of automobile-used solar energy electric air-conditioner control system of engineering

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