CN103307709B - The electric automobile heat-pump air-conditioning system that a kind of refrigerant charge is adjustable - Google Patents
The electric automobile heat-pump air-conditioning system that a kind of refrigerant charge is adjustable Download PDFInfo
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- CN103307709B CN103307709B CN201310218052.1A CN201310218052A CN103307709B CN 103307709 B CN103307709 B CN 103307709B CN 201310218052 A CN201310218052 A CN 201310218052A CN 103307709 B CN103307709 B CN 103307709B
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Abstract
The present invention relates to the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge is adjustable, belong to air-conditioning technical and automobile technical field, the present invention can regulate the rotating speed of heat exchanger fan in compressor, car external heat exchanger fan, car at any time according to the temperature signal of the outer temperature sensor of car, vehicle interior temperature sensor, thus makes system be in optimum operating mode; Can according to the pressure signal of compressor discharge pressure sensor; switch two-position three way magnetic valve, realize storage and the release of cold-producing medium, thus realize the coupling of refrigerating/heating pattern refrigerant charge; and reduce system condensing pressure under refrigeration mode; play the effect of pressure protect, under heating mode, increase system condensing pressure, increase system heating capacity; improve the heating efficiency of heat pump air conditioner; reduce energy consumption, increase electric automobile mileages of continuation, promote the application of electric automobile.
Description
Technical field
The present invention relates to the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge is adjustable, belong to air-conditioning technical and automobile technical field.
Background technology
Current electric automobile generally adopts PTC auxiliary electrical heater mode to realize heat-production functions, and power consumption is large, and heating efficiency is low, and simple dependence PTC electrical heating heats the mileages of continuation that can reduce electric automobile.For reducing energy consumption, the increase electric automobile mileages of continuation of air-conditioning system, the electric automobile heat-pump air-conditioning system adopting steam compression cycle is proposed, this system can realize refrigerating/heating function, compared with PTC auxiliary electrical heater, has that power consumption is low, energy consumption is high, there is not the features such as potential safety hazard.Winter electric automobile under the working environment of cold, system condensing pressure and condensation temperature is lower, refrigerant charging quantity not sufficient under heat pump type air conditioning system heating mode, can cause winter heating's quantity not sufficient, heating effect is poor.
Summary of the invention
The object of the invention is to solve under electric automobile heat-pump air-conditioning system heating mode system condensing pressure and condensation temperature is lower, refrigerant charging quantity not sufficient, cause the problem of heating effect difference, propose the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge is adjustable, this device can realize the electric automobile heat-pump air conditioner refrigerating/adjustment of heating mode system condensing pressure and the coupling of refrigerant charge.
The electric automobile heat-pump air-conditioning system that refrigerant charge is adjustable, mainly comprises: compressor, pressure sensor, the outer humidity sensor of car, the outer temperature sensor of car, vehicle interior temperature sensor, ECU, four-way reversing solenoid valve, heat exchanger in car, heat exchanger fan in car, first check valve, second check valve, first throttle pipe, the 3rd check valve, the 4th check valve, second throttle pipe, 5th check valve, the 6th check valve, two-position three way magnetic valve, accumulator, car external heat exchanger fan, car external heat exchanger, gas-liquid separator.
In the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge of the present invention is adjustable, compressor is by dc source Direct driver, exhaust outlet of compressor is connected with four-way reversing solenoid valve by air conditioning hose, and in this pipeline setting pressure sensor, compressor inlet is connected with gas-liquid separator by air conditioning hose.All the other interfaces of four-way reversing solenoid valve connect heat exchanger, car external heat exchanger and gas-liquid separator in car respectively by air conditioning hose.With copper pipe by parallel with the second check valve after the series connection of first throttle Guan Yu tri-check valve, and be connected with heat exchanger in car with copper pipe; In parallel with the 5th check valve after the second throttle pipe being connected with the 4th check valve with copper pipe, and be connected with car external heat exchanger with copper pipe.Accumulator is connected with two-position three way magnetic valve by air conditioning hose.First check valve is connected with heat exchanger in car and two-position three way magnetic valve by copper pipe, and when guaranteeing that two-position three way magnetic valve is energized, cold-producing medium can by the unidirectional inflow heat pump type air conditioning system of accumulator; 6th check valve is connected with car external heat exchanger and two-position three way magnetic valve by copper pipe, and when guaranteeing two-position three way magnetic valve power-off, cold-producing medium can have the unidirectional inflow accumulator of heat pump type air conditioning system.
Described compressor is DC speed regulation electric scroll formula compressor, comprises power interface and signaling interface, can regulate compressor rotary speed signal by ECU.This compressor seal is good, volumetric efficiency is high, volume is little, lightweight, stable action, noise are low, is suitable for electric automobile air-conditioning system and uses.
Described throttle pipe is as the restriction expansion device of electric automobile heat-pump air-conditioning heating pattern, and compared to expansion valve, throttle pipe through hole sectional area is comparatively large, not easily blocks, and can ensure the reducing pressure by regulating flow of cold-producing medium under low temperature environment.This throttle pipe structure is simple, and reliability is high, saves energy consumption, but for prevent compressor liquid hammer need with gas-liquid separator with the use of.
In described car, heat exchanger is fin-tube type heat exchanger, and electric automobile heat-pump air-conditioning is used as evaporimeter in cooling mode, is used as condenser in a heating mode.Under the prerequisite meeting heat exchange amount, the volume of heat exchanger in car should be made little as far as possible.
Described car external heat exchanger is micro-channel parallel flow heat exchanger, and electric automobile heat-pump air-conditioning is used as condenser in cooling mode, is used as evaporimeter in a heating mode.Under the prerequisite meeting heat exchange amount, the volume of car external heat exchanger should be made little as far as possible.
Described accumulator is spring accumul ator, and utilize the compression of spring to store and refrigerant release with elongation, this accumulator initial tension of spring is adjustable, and structure is simple, is quick on the draw.Under electric automobile heat-pump air conditioner refrigerating pattern; two-position three way magnetic valve power-off; accumulator is connected with car external heat exchanger by two-position three way magnetic valve, the 6th check valve; when heat pump type air conditioning system condensing pressure is lower than accumulator initial tension of spring; the many good refrigeration effect of refrigerant charge in heat pump type air conditioning system; when heat pump type air conditioning system condensing pressure is higher than accumulator initial tension of spring; cold-producing medium is press-fit in accumulator; realize the storage of cold-producing medium in accumulator; reduce system condensing pressure, play high voltage protective effect.Under electric automobile heat-pump air-conditioning heating pattern, two-position three way magnetic valve is energized, accumulator passes through two-position three way magnetic valve, first check valve is connected with heat exchanger in car, when heat pump type air conditioning system condensing pressure is lower than accumulator initial tension of spring, cold-producing medium is press-fit in heat pump type air conditioning system, realize the release of cold-producing medium in accumulator, increase system condensing pressure, increase system heating capacity, when heat pump type air conditioning system condensing pressure is higher than accumulator initial tension of spring, due to the effect of check valve, cold-producing medium can not reflux, refrigerant charge higher in system under guarantee heating mode.
Described ECU can collect and process machine back pressure transducer, the outer humidity sensor of car, the outer temperature sensor of car, vehicle interior temperature sensor signal.This ECU can realize the refrigerating/heating pattern of electric automobile heat-pump air-conditioning according to the signal switching four-way reversing solenoid valve of the outer temperature sensor of car, when the power-off of four-way reversing solenoid valve, electric automobile heat-pump air-conditioning is in refrigeration mode, when four-way change-over valve is energized, electric automobile heat-pump air-conditioning is in heating mode.This ECU can regulate the rotating speed of heat exchanger fan in compressor, car external heat exchanger fan, car at any time according to the signal of vehicle interior temperature sensor, thus makes heat pump type air conditioning system be in optimum duty.This ECU can realize storage and the release of accumulator inner refrigerant according to the signal switching two-position three way magnetic valve of compressor discharge pressure sensor, realize the coupling of refrigerating/heating pattern refrigerant charge, when two-position three way magnetic valve power-off under refrigeration mode, during system condensing hypertonia, cold-producing medium is press-fit in accumulator, realizes the storage of cold-producing medium; When the energising of heating mode two-position three way magnetic valve, during system condensing hypotony, cold-producing medium is press-fit in heat pump type air conditioning system, realizes the release of cold-producing medium.
Beneficial effect
1, the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge of the present invention is adjustable; contain accumulator and two-position three way magnetic valve; storage and the release of cold-producing medium in accumulator can be realized; thus realize the coupling of refrigerating/heating pattern refrigerant charge; and reduce system condensing pressure under refrigeration mode; play the effect of pressure protect, under heating mode, increase system condensing pressure, increase system heating capacity.
2, the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge of the present invention is adjustable, this electric automobile heat-pump air-conditioning system can increase the charging amount of cold-producing medium in system duty cycle under heating mode, improve heat pump type air conditioning system condensing pressure and condensation temperature, thus increase heat pump type air conditioning system heating capacity, improve the heating efficiency of heat pump air conditioner, reduce energy consumption, increase electric automobile mileages of continuation, promote the application of electric automobile.
Accompanying drawing explanation
Fig. 1 is the structural representation of the adjustable electric automobile heat-pump air-conditioning system of a kind of refrigerant charge of the present invention;
Fig. 2 is the electric automobile heat-pump air-conditioning system refrigeration mode refrigerant circulation figure that in detailed description of the invention, a kind of refrigerant charge is adjustable;
Fig. 3 is the electric automobile heat-pump air-conditioning system heating mode refrigerant circulation figure that in detailed description of the invention, a kind of refrigerant charge is adjustable;
Fig. 4 be under the adjustable electric automobile heat-pump air-conditioning heating pattern of a kind of refrigerant charge different refrigerant charge on the impact of system condensing pressure;
Fig. 5 be under the adjustable electric automobile heat-pump air-conditioning heating pattern of a kind of refrigerant charge different refrigerant charge on the impact of mean temperature in car.
Wherein, 1-compressor, 2-pressure sensor, the outer humidity sensor of 3-car, the outer temperature sensor of 4-car, 5-vehicle interior temperature sensor, 6-ECU, 7-four-way reversing solenoid valve, heat exchanger in 8-car, heat exchanger fan in 9-car, 10-the first check valve, 11-the second check valve, 12-first throttle pipe, 13-the three check valve, 14-the four check valve, 15-the second throttle pipe, 16-the five check valve, 17-the six check valve, 18-two-position three way magnetic valve, 19-accumulator, 20-car external heat exchanger fan, 21-car external heat exchanger, 22-gas-liquid separator.
Detailed description of the invention
In order to better objects and advantages of the present invention are described, below in conjunction with drawings and Examples, the present invention is described in detail.
Embodiment 1
The electric automobile heat-pump air-conditioning system that a kind of refrigerant charge is adjustable, as shown in Figure 1, comprise: compressor 1, pressure sensor 2, the outer humidity sensor 3 of car, the outer temperature sensor 4 of car, vehicle interior temperature sensor 5, ECU 6, four-way reversing solenoid valve 7, heat exchanger 8 in car, heat exchanger fan 9 in car, first check valve 10, second check valve 11, first throttle pipe 12, 3rd check valve 13, 4th check valve 14, second throttle pipe 15, 5th check valve 16, 6th check valve 17, two-position three way magnetic valve 18, accumulator 19, car external heat exchanger fan 20, car external heat exchanger 21, gas-liquid separator 22.
Compressor 1 is by dc source Direct driver, and exhaust outlet of compressor is connected with four-way reversing solenoid valve 7 by air conditioning hose, and in this pipeline setting pressure sensor 2, compressor inlet is connected with gas-liquid separator 22 by air conditioning hose.All the other interfaces of four-way reversing solenoid valve 7 connect heat exchanger 8, car external heat exchanger 21 and gas-liquid separator 22 in car respectively by air conditioning hose.In parallel with the second check valve 11 after first throttle pipe 12 being connected with the 3rd check valve 13 with copper pipe, and be connected with heat exchanger in car 8 with copper pipe; In parallel with the 5th check valve 16 after the second throttle pipe 15 being connected with the 4th check valve 14 with copper pipe, and be connected with car external heat exchanger 21 with copper pipe.Accumulator 19 is connected with two-position three way magnetic valve 18 by air conditioning hose.First check valve 10 is connected with heat exchanger in car 8 and two-position three way magnetic valve 18 by copper pipe, and when guaranteeing that two-position three way magnetic valve 18 is energized, cold-producing medium can by the unidirectional inflow heat pump type air conditioning system of accumulator 19; 6th check valve 17 is connected with car external heat exchanger 21 and two-position three way magnetic valve 18 by copper pipe, and when guaranteeing two-position three way magnetic valve 18 power-off, cold-producing medium can have the unidirectional inflow accumulator 19 of heat pump type air conditioning system.
The electric automobile heat-pump air-conditioning system refrigeration mode that a kind of refrigerant charge of the present invention is adjustable, as shown in Figure 2.Electric automobile heat-pump air-conditioning system starts, and ECU 6 makes four-way reversing solenoid valve 7 be in the state of power-off, and now heat pump type air conditioning system is in refrigeration mode.The gaseous refrigerant acting of compressor 1 pair of low-temp low-pressure, it is made to be compressed into the gas of HTHP, cold-producing medium flows into car external heat exchanger 21 through four-way reversing solenoid valve, the liquid of middle temperature high pressure is become after isobaric condensation, and dispel the heat in environment, after flow into first throttle pipe 12 through the 5th check valve 16, the 3rd check valve 13, reducing pressure by regulating flow through first throttle pipe 12 becomes the gas-liquid mixture of low-temp low-pressure, last cold-producing medium evaporates the gas becoming low-temp low-pressure in car in heat exchanger 8, and from the indoor absorption heat of car, complete a kind of refrigeration cycle.Under this pattern, car external heat exchanger 21 is used as condenser, and in car, heat exchanger 8 is used as evaporimeter, and cold-producing medium does not flow through the second throttle pipe 15, the 4th check valve 14, second check valve 11.
The electric automobile heat-pump air-conditioning system heating mode that a kind of refrigerant charge of the present invention is adjustable, as shown in Figure 3.Electric automobile heat-pump air-conditioning system starts, and ECU 6 makes four-way reversing solenoid valve 7 be in the state of energising, and now heat pump type air conditioning system is in heating mode.The gaseous refrigerant acting of compressor 1 pair of low-temp low-pressure, it is made to be compressed into the gas of HTHP, cold-producing medium flows into heat exchanger 8 in car through four-way reversing solenoid valve, the liquid of middle temperature high pressure is become after isobaric condensation, and dispel the heat in car, after flow into the second throttle pipe 15 through the second check valve 11, the 4th check valve 14, reducing pressure by regulating flow through the second throttle pipe 15 becomes the gas-liquid mixture of low-temp low-pressure, last cold-producing medium evaporates the gas becoming low-temp low-pressure in car external heat exchanger 21, and heat is absorbed from environment, complete and once heat circulation.Under this pattern, car external heat exchanger 21 is used as evaporimeter, and in car, heat exchanger 8 is used as condenser, and cold-producing medium does not flow through first throttle pipe 12, the 3rd check valve 13, the 5th check valve 16.
The starting stage of the electric automobile heat-pump air-conditioning system refrigerating/heating pattern that a kind of refrigerant charge of the present invention is adjustable, ECU 6 is according to car outer temperature sensor 4, vehicle interior temperature sensor 5 temperature signal, in control car, heat exchanger fan 9, car external heat exchanger fan 20, compressor 1 are in lower at a high speed operation, thus make cooling system amount/heating capacity maximum; After vehicle interior temperature reaches comfort temperature, ECU 6 controls heat exchanger fan 9 in car, car external heat exchanger fan 20, compressor 1 are in best rotating speed, makes system be in best Energy Efficiency Ratio.
The electric automobile heat-pump air-conditioning system that a kind of refrigerant charge of the present invention is adjustable controls the switching of two-position three way reversing solenoid valve 18 by ECU 6, realize storage and the release of cold-producing medium, thus realize the coupling of refrigerating/heating pattern refrigerant charge.Electric automobile heat-pump air-conditioning in cooling mode ECU 6 makes two-position three way magnetic valve 18 power-off; accumulator 19 is connected with car external heat exchanger 21 by two-position three way magnetic valve 18, the 6th check valve 17; when heat pump type air conditioning system condensing pressure is lower than accumulator initial tension of spring; the many good refrigeration effect of refrigerant charge in heat pump type air conditioning system; when heat pump type air conditioning system condensing pressure is higher than accumulator initial tension of spring; cold-producing medium is press-fit in accumulator; realize the storage of cold-producing medium in accumulator; reduce system condensing pressure, play high voltage protective effect.Under electric automobile heat-pump air-conditioning heating pattern, ECU 6 makes two-position three way magnetic valve 18 be energized, accumulator 19 is by two-position three way magnetic valve 18, first check valve 10 is connected with heat exchanger in car 8, when heat pump type air conditioning system condensing pressure is lower than accumulator initial tension of spring, cold-producing medium is press-fit in heat pump type air conditioning system, realize the release of cold-producing medium in accumulator, increase system condensing pressure, increase system heating capacity, when heat pump type air conditioning system condensing pressure is higher than accumulator initial tension of spring, due to the effect of check valve, cold-producing medium can not reflux, refrigerant charge higher in system under guarantee heating mode.
Embodiment 2
The electric automobile heat-pump air-conditioning system that a kind of refrigerant charge is adjustable, as shown in Figure 1, comprise: compressor 1, pressure sensor 2, the outer humidity sensor 3 of car, the outer temperature sensor 4 of car, vehicle interior temperature sensor 5, ECU 6, four-way reversing solenoid valve 7, heat exchanger 8 in car, heat exchanger fan 9 in car, first check valve 10, second check valve 11, first throttle pipe 12, 3rd check valve 13, 4th check valve 14, second throttle pipe 15, 5th check valve 16, 6th check valve 17, two-position three way magnetic valve 18, accumulator 19, car external heat exchanger fan 20, car external heat exchanger 21, gas-liquid separator 22.
Compressor 1 is by dc source Direct driver, and exhaust outlet of compressor is connected with four-way reversing solenoid valve 7 by air conditioning hose, and in this pipeline setting pressure sensor 2, compressor inlet is connected with gas-liquid separator 22 by air conditioning hose.All the other interfaces of four-way reversing solenoid valve 7 connect heat exchanger 8, car external heat exchanger 21 and gas-liquid separator 22 in car respectively by air conditioning hose.In parallel with the second check valve 11 after first throttle pipe 12 being connected with the 3rd check valve 13 with copper pipe, and be connected with heat exchanger in car 8 with copper pipe; In parallel with the 5th check valve 16 after the second throttle pipe 15 being connected with the 4th check valve 14 with copper pipe, and be connected with car external heat exchanger 21 with copper pipe.Accumulator 19 is connected with two-position three way magnetic valve 18 by air conditioning hose.First check valve 10 is connected with heat exchanger in car 8 and two-position three way magnetic valve 18 by copper pipe, and when guaranteeing that two-position three way magnetic valve 18 is energized, cold-producing medium can by the unidirectional inflow heat pump type air conditioning system of accumulator 19; 6th check valve 17 is connected with car external heat exchanger 21 and two-position three way magnetic valve 18 by copper pipe, and when guaranteeing two-position three way magnetic valve 18 power-off, cold-producing medium can have the unidirectional inflow accumulator 19 of heat pump type air conditioning system.
The electric automobile heat-pump air-conditioning system that a kind of refrigerant charge is adjustable, freeze at environment temperature 35 DEG C, heat at environment temperature 0 DEG C, compressor rotary speed maintains 3400r/min, suitable refrigerant charge is 500g to find electric automobile heat-pump air-conditioning system refrigeration mode, and the refrigerant charge that heating mode is suitable is 750g.Under Fig. 4,5 is respectively the adjustable electric automobile heat-pump air-conditioning heating pattern of a kind of refrigerant charge, different refrigerant charge is on the impact of mean temperature in system condensing pressure, car.Visible, when under electric automobile heat-pump air-conditioning system heating mode, refrigerant charge is 750g, system condensing pressure is higher, and in car, to reach time of comfort temperature shorter for mean temperature.Thus electric automobile heat-pump air-conditioning system working medium charging amount is defined as 750g, accumulator initial tension of spring is adjusted to 15bar, under electric automobile heat-pump air conditioner refrigerating pattern, condensing pressure can reach 20bar higher than initial tension of spring, cold-producing medium is press-fit in accumulator, the charging amount of cold-producing medium in systemic circulation is made to be 500g, realize the storage of cold-producing medium in accumulator, reduce system condensing pressure, play high voltage protective effect; Under heating mode, condensing pressure is up to 13bar lower than initial tension of spring, cold-producing medium is press-fit in heat pump type air conditioning system, and the charging amount making cold-producing medium in systemic circulation is 750g, realizes the release of cold-producing medium in accumulator, increase system condensing pressure, increase system heating capacity.
The foregoing is only preferred embodiment of the present invention, therefore do not limit protection scope of the present invention, every equalization change done according to the present invention all belongs in the scope of the claims that the present invention contains with modifying.
Claims (9)
1. the electric automobile heat-pump air-conditioning system that a refrigerant charge is adjustable, comprise: compressor (1), pressure sensor (2), the outer humidity sensor (3) of car, the outer temperature sensor (4) of car, vehicle interior temperature sensor (5), ECU (6), four-way reversing solenoid valve (7), heat exchanger (8) in car, heat exchanger fan (9) in car, second check valve (11), 3rd check valve (13), 4th check valve (14), 5th check valve (16), car external heat exchanger fan (20), car external heat exchanger (21), gas-liquid separator (22), it is characterized in that: also comprise the first check valve (10), first throttle pipe (12), the second throttle pipe (15), the 6th check valve (17), two-position three way magnetic valve (18), accumulator (19), compressor (1) is by dc source Direct driver, exhaust outlet of compressor is connected with four-way reversing solenoid valve (7) by air conditioning hose, and in this air conditioning hose setting pressure sensor (2), compressor inlet is connected with gas-liquid separator (22) by air conditioning hose, all the other interfaces of four-way reversing solenoid valve (7) connect heat exchanger (8), car external heat exchanger (21) and gas-liquid separator (22) in car respectively by air conditioning hose, in parallel with the second check valve (11) after first throttle pipe (12) being connected with the 3rd check valve (13) with copper pipe, and be connected with heat exchanger in car (8) with copper pipe, in parallel with the 5th check valve (16) after the second throttle pipe (15) being connected with the 4th check valve (14) with copper pipe, and be connected with car external heat exchanger (21) with copper pipe, accumulator (19) is connected with two-position three way magnetic valve (18) by air conditioning hose, first check valve (10) is connected with heat exchanger in car (8) and two-position three way magnetic valve (18) by copper pipe, and when guaranteeing that two-position three way magnetic valve (18) is energized, cold-producing medium can by the unidirectional inflow heat pump type air conditioning system of accumulator (19), 6th check valve (17) is connected with car external heat exchanger (21) and two-position three way magnetic valve (18) by copper pipe, and when guaranteeing two-position three way magnetic valve (18) power-off, cold-producing medium can by the unidirectional inflow accumulator (19) of heat pump type air conditioning system.
2. the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge as claimed in claim 1 is adjustable, it is characterized in that: the switching being controlled two-position three way reversing solenoid valve (18) by ECU (6), realize storage and the release of cold-producing medium, thus realize the coupling of refrigerating/heating pattern refrigerant charge.
3. the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge as claimed in claim 1 is adjustable, it is characterized in that: described accumulator (19) is spring accumul ator, utilize the compression of spring to store and refrigerant release with elongation, this accumulator initial tension of spring is adjustable.
4. the method for refrigerant charge under the electric automobile heat-pump air-conditioning system adjustment refrigerating/heating pattern utilizing a kind of refrigerant charge described in claim 1 or 2 or 3 adjustable, it is characterized in that: under electric automobile heat-pump air conditioner refrigerating pattern, two-position three way magnetic valve (18) power-off, accumulator (19) is by two-position three way magnetic valve (18), 6th check valve (17) is connected with car external heat exchanger (21), when heat pump type air conditioning system condensing pressure is lower than accumulator initial tension of spring, the many good refrigeration effect of refrigerant charge in heat pump type air conditioning system, when heat pump type air conditioning system condensing pressure is higher than accumulator initial tension of spring, cold-producing medium is press-fit in accumulator (19), realize the storage of cold-producing medium in accumulator (19), reduce system condensing pressure, play high voltage protective effect, under electric automobile heat-pump air-conditioning heating pattern, two-position three way magnetic valve (18) is energized, accumulator (19) is by two-position three way magnetic valve (18), first check valve (10) is connected with heat exchanger in car (8), when heat pump type air conditioning system condensing pressure is lower than accumulator initial tension of spring, cold-producing medium is press-fit in heat pump type air conditioning system, realize the release of cold-producing medium in accumulator (19), increase system condensing pressure, increase system heating capacity, when heat pump type air conditioning system condensing pressure is higher than accumulator initial tension of spring, due to the effect of check valve, cold-producing medium can not reflux, refrigerant charge higher in system under guarantee heating mode.
5. the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge as claimed in claim 1 is adjustable, it is characterized in that: described throttle pipe (12,15), as the restriction expansion device of electric automobile heat-pump air-conditioning heating pattern, can ensure the reducing pressure by regulating flow of cold-producing medium under low temperature environment.
6. the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge as claimed in claim 1 is adjustable, it is characterized in that: described compressor (1) is DC speed regulation electric scroll formula compressor, comprise power interface and signaling interface, compressor rotary speed signal can be regulated by ECU.
7. the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge as claimed in claim 1 is adjustable, it is characterized in that: in described car, heat exchanger (8) is fin-tube type heat exchanger, electric automobile heat-pump air-conditioning is used as evaporimeter in cooling mode, is used as condenser in a heating mode; Under the prerequisite meeting heat exchange amount, the volume of heat exchanger in car should be made little as far as possible.
8. the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge as claimed in claim 1 is adjustable, it is characterized in that: described car external heat exchanger (21) is micro-channel parallel flow heat exchanger, electric automobile heat-pump air-conditioning is used as condenser in cooling mode, is used as evaporimeter in a heating mode; Under the prerequisite meeting heat exchange amount, the volume of car external heat exchanger should be made little as far as possible.
9. the electric automobile heat-pump air-conditioning system that a kind of refrigerant charge as claimed in claim 1 is adjustable, is characterized in that: described ECU (6) can collect and process machine back pressure transducer (2), the outer humidity sensor (3) of car, the outer temperature sensor (4) of car, vehicle interior temperature sensor (5) signal; This ECU (6) can realize the refrigerating/heating pattern of electric automobile heat-pump air-conditioning according to the signal switching four-way reversing solenoid valve (7) of the outer temperature sensor (4) of car, when four-way reversing solenoid valve (7) power-off, electric automobile heat-pump air-conditioning is in refrigeration mode, when four-way reversing solenoid valve (7) is energized, electric automobile heat-pump air-conditioning is in heating mode; This ECU (6) can regulate the rotating speed of heat exchanger fan (9) in compressor (1), car external heat exchanger fan (20), car at any time according to the signal of vehicle interior temperature sensor (5), thus makes heat pump type air conditioning system be in optimum duty; This ECU (6) can realize storage and the release of accumulator (19) inner refrigerant according to the signal switching two-position three way magnetic valve (18) of compressor discharge pressure sensor (2), realize the coupling of refrigerating/heating pattern refrigerant charge, when two-position three way magnetic valve under refrigeration mode (18) power-off, during system condensing hypertonia, cold-producing medium is press-fit in accumulator (19), realizes the storage of cold-producing medium; When heating mode two-position three way magnetic valve (18) energising, during system condensing hypotony, cold-producing medium is press-fit in heat pump type air conditioning system, realizes the release of cold-producing medium.
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| CN102563939A (en) * | 2012-02-17 | 2012-07-11 | 青岛海尔空调电子有限公司 | Air-cooling water chiller |
| CN202647988U (en) * | 2012-03-21 | 2013-01-02 | 广东志高空调有限公司 | Air conditioner device with refrigerant flow quantity adjustable |
| CN102980262A (en) * | 2012-12-04 | 2013-03-20 | 北京理工大学 | Electric automobile heat pump air conditioning system driven by variable frequency motor |
| CN203298439U (en) * | 2013-06-03 | 2013-11-20 | 北京理工大学 | Electro-mobile heat pump air conditioner system with refrigerant charge adjustable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100788459B1 (en) * | 2006-11-02 | 2007-12-24 | 주식회사 대우일렉트로닉스 | Heat pump air-conditioner having function for controlling flux of refrigerant |
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2013
- 2013-06-03 CN CN201310218052.1A patent/CN103307709B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338950A (en) * | 2008-08-18 | 2009-01-07 | 南京天加空调设备有限公司 | Great heating capacity multiple air conditioner heat pump units |
| CN102563939A (en) * | 2012-02-17 | 2012-07-11 | 青岛海尔空调电子有限公司 | Air-cooling water chiller |
| CN202647988U (en) * | 2012-03-21 | 2013-01-02 | 广东志高空调有限公司 | Air conditioner device with refrigerant flow quantity adjustable |
| CN102980262A (en) * | 2012-12-04 | 2013-03-20 | 北京理工大学 | Electric automobile heat pump air conditioning system driven by variable frequency motor |
| CN203298439U (en) * | 2013-06-03 | 2013-11-20 | 北京理工大学 | Electro-mobile heat pump air conditioner system with refrigerant charge adjustable |
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| Publication number | Publication date |
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| CN103307709A (en) | 2013-09-18 |
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