CN102305446A - Magnetic refrigeration device for electric automobile air conditioner and control method for magnetic refrigeration device - Google Patents
Magnetic refrigeration device for electric automobile air conditioner and control method for magnetic refrigeration device Download PDFInfo
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- CN102305446A CN102305446A CN201110272145A CN201110272145A CN102305446A CN 102305446 A CN102305446 A CN 102305446A CN 201110272145 A CN201110272145 A CN 201110272145A CN 201110272145 A CN201110272145 A CN 201110272145A CN 102305446 A CN102305446 A CN 102305446A
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Abstract
The invention discloses a magnetic refrigeration device for an electric automobile air conditioner and a control method for the magnetic refrigeration device. The magnetic refrigeration device comprises a magnetic refrigeration module, an air conditioner heater, ventilation and air conditioning (HVAC) assembly, air conditioner pipelines, an air conditioner heat exchanger and a circulation system, wherein a magnetic refrigeration system is connected with the air conditioner HVAC assembly through the air conditioner pipeline; the air conditioner heat exchanger is connected with a circulation water pump and the magnetic refrigeration module through the air conditioner pipelines; the circulation water pump is connected with the magnetic refrigeration module through the air conditioner pipeline; and the magnetic refrigeration module, the air conditioner HVAC assembly, the air conditioner pipelines, the air conditioner heat exchanger and the circulation system form a closed loop. The control method comprises the following steps that: cold water or hot water is produced by the magnetic refrigeration module; and flow is enhanced through the circulation water pump, so that refrigerating or heating for the air conditioner is realized, and temperature reduction and raising for the air in an automobile can be realized. The magnetic refrigeration has high efficiency, low power consumption, low noise and vibration and small influence on the whole automobile; and moving parts of a whole system only have driving motors in a water pump and a magnetic refrigeration machine, so the required power is low and the control is simple and reliable.
Description
Technical field
The present invention relates to automobile air conditioning technology, especially relate to a kind of magnetic refrigeration apparatus and control method thereof that is used for the electric automobile air-conditioning.
Background technology
At present, electric automobile is mainly continued to use traditional gas compression-swell refrigeration system, because the thermal efficiency of this refrigeration modes can only reach 5%～10% of Carnot cycle, so can cause the continuation of the journey mileage of electric motor car to descend significantly after using air-conditioning.And because the aggravation of atmosphere ozone cavity and greenhouse effects at present, people are increasingly high to requirement on environmental protection, and traditional fluorinated refrigerant is incompatibility environmental protection requirement more and more, must use other pollution-free refrigeration modes alternative it.
The magnetic refrigeration is the Refrigeration Technique of an environmental protection, compares with the tradition refrigeration, and the magnetic refrigeration is to adopt magnetisable material as refrigeration working medium, and atmosphere is not had effect of damaging the ozone layer and greenhouse effects.The unit duty of magnetic refrigeration is high in addition, can reach 30%～60% of Carnot cycle in theory, is more than 3 times of gas compression-swell refrigeration mode.Therefore, the magnetic refrigeration apparatus that in electric motor car, uses of research is significant and wide application prospect.
Summary of the invention
Technical problem to be solved by this invention is to the problem that exists in the prior art a kind of magnetic refrigeration apparatus and control method thereof that is used for the electric automobile air-conditioning to be provided, and reduces power consumption and noise when its objective is the refrigerating efficiency that improves the electric automobile air-conditioning.
Technical scheme of the present invention is the magnetic refrigeration apparatus that this kind is used for the electric automobile air-conditioning; Comprise magnetic refrigeration module, air conditioning HVAC assembly, air-conditioning duct, air-condition heat exchanger and the circulatory system; Described magnetic refrigerating system is connected with the air conditioning HVAC assembly through air-conditioning duct; Described air-condition heat exchanger is connected with the magnetic refrigeration module with water circulating pump through air-conditioning duct; Described water circulating pump is connected with the magnetic refrigeration module through air-conditioning duct, and described magnetic refrigeration module, air conditioning HVAC assembly, air-conditioning duct, air-condition heat exchanger and the circulatory system form a closed-loop path.
Two air-conditioning ducts are arranged between described magnetic refrigeration module and the air conditioning HVAC assembly, are cold water in one of them air-conditioning duct, are room temperature waters in another air-conditioning duct.
In the air-conditioning duct between described magnetic refrigeration module and the air-condition heat exchanger is hot water.
The method of utilizing above-mentioned magnetic refrigeration apparatus to control is specially: by magnetic refrigeration module generation cold water or hot water, pass through the water circulating pump increase then and flow, realize that the refrigeration of air-conditioning perhaps heats, thereby realization is lowered the temperature to air in the car and heated.
When needs freeze, hot water is led to the air-condition heat exchanger heat radiation, the heat exchanger that cold water leads in the air conditioning HVAC assembly carries out refrigeration cool-down, plays the effect of air-conditioning temperature-reducing.
In the time of needs heating, the pump water direction of conversion cycle water pump is led to the heat that air-condition heat exchanger absorbs air with cold water, and hot water is led to the heat exchanger in the air conditioning HVAC assembly, and air in the car is heated.
A kind of magnetic refrigeration apparatus and control method thereof that is used for the electric automobile air-conditioning with said structure has the following advantages:
1. this kind is used for the magnetic refrigeration apparatus of electric automobile air-conditioning owing to adopt liquid agent for storage of coldness (water) to conduct heat; There is not the high-low pressure zone in magnetic refrigerating system, and with respect to the system of present vapour compression refrigeration method, its pipeline and heat exchanger can be simplified; Need not the withstand voltage pipeline of high strength and the heat exchanger of employing at present; The pipeline docking structure does not need the close tolerance seal structure yet, can use very simple tide of motorism water pipe, utilizes clamp connection to get final product.
2. this kind is used for agent for storage of coldness that the magnetic refrigeration apparatus of electric automobile air-conditioning uses as water (or water-ethylene glycol solution), and with low cost, it is convenient to replenish, and environment is not had any pollution, meets current social to requirements of green environmental protection.
3. this kind is used for the magnetic refrigeration apparatus refrigerating efficiency height of electric automobile air-conditioning, and low in energy consumption, noise vibration is little, and little to the car load influence, the moving component of whole system has only the drive motors in water pump and the magnetic refrigerator, and power demand is little, controls simple and reliable.
4. it is in light weight that this kind is used for the magnetic refrigerator of magnetic refrigeration apparatus of electric automobile air-conditioning, and volume is little, and the life-span is long, and recyclable utilization rate is high, and is simultaneously easy to installation and maintenance.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
Fig. 1 is the room temperature magnetic refrigerating fundamental diagram.
Fig. 2 is a magnetic card promise circulation sketch map.
Fig. 3 is the sketch map of Kano type magnetic refrigerator.
Fig. 4 is a structural representation of the present invention.
In Fig. 1-4,1: the magnetic refrigeration module; 2: the air conditioning HVAC assembly; 3: air-conditioning duct; 4: air-condition heat exchanger; 5: water circulating pump; 6: magnet; 7: the cold-storage tube; 8: the gadolinium plate.
Air conditioning HVAC assembly: HVAC-Heater, ventilation and air conditioning, Chinese implication is heating, the heating ventilation and air-conditioning system.
The specific embodiment
Magnetothermal effect (also crying magneto-caloric effect) is meant that magnetic refrigeration working substance emits heat to the external world when isothermal magnetization, and temperature reduces during adiabatic demagnetization, absorbs the phenomenon of heat from the external world.Traditional magnetic refrigeration apparatus is mainly used in utmost point cryogenic refrigeration field (4.2～20K).In recent years, Along with people's has been found several kinds of materials with huge magneto-caloric effect to the research of rare earth element, makes the application of magnetic Refrigeration Technique in the room temperature refrigeration become possibility, has had a lot of research institutions to manufacture experimently out the room temperature magnetic refrigerating unit.
Shown in Figure 1 is the room temperature magnetic refrigerating fundamental diagram, the figure of metal gadolinium (Gd) under 200～300K condition.If by Carnot cycle refrigeration, among the figure 12341, then temperature drop is very little like figure.
Magnetic card promise circulation is to be connected two constant temperature process with the adiabatic magnetization process with adiabatic demagnetization, shown in accompanying drawing 2.In this circulation, the outside area that refrigeration working medium institute work is equivalent to quadrangle ABCD.
Be that example describes the adiabatic demagnetization process of refrigerastion with the simplest magnetic card promise circulation below, shown in accompanying drawing 3.Isothermal magnetization process (the AB process among Fig. 2): thermal switch I is closed, II breaks off, and magnetic field puts on magnetic working medium, and entropy is reduced, and is connected through the hot junction of high temperature heat source with magnetic working medium, and heat imports high temperature heat source into from magnetic working medium.
Adiabatic demagnetization process (the BC process among Fig. 2): thermal switch I breaks off, II still breaks off, and removes magnetic field gradually, and spin system is unordered gradually in the magnetic working medium, and ability in demagnetization process, consuming makes magnetic working medium temperature drop to low-temperature heat source temperature.
Isothermal demagnetization process (the CD process among Fig. 2): II is closed, I still breaks off, and magnetic field continues to weaken, and magnetic working medium is absorbed heat from low-temperature heat source.
Adiabatic magnetization process (the DA process among Fig. 2): II breaks off, I still breaks off, and applies a less magnetic field, and magnetic working medium temperature rises to the high temperature heat source temperature gradually.
Because the warm-up movement of magnetic ion system is strengthened greatly near the room temperature, the magnetic order degree of magnetic working medium is difficult to form, and becomes at the magnetic entropy that receives external magnetic field effect front and back to reduce greatly, and the generation of high-intensity magnetic field simultaneously also receives the restriction of many conditions, and magnetothermal effect also weakens greatly.In order further to improve the efficient of room-temperature magnetic refrigerator, the main usually magnetic Sven-Gan Eriksson circularly cooling machine of using
Shown among Fig. 1 12341.It is made up of four processes: 1-2 is an isothermal magnetization; Magnetic field processes (temperature reduction) such as 2-3 is; 3-4 is isothermal demagnetization (absorption refrigeration); Magnetic field processes (temperature rising) such as 4-1 is.
Metal gadolinium plate 8 (magnetic material) is immersed in the cold-storage liquid (water+ethylene glycol solution) of cold-storage tube 7.Utilize magnet 6 changes of magnetic field on every side to cooperate cold-storage tube 7 to move up and down and realize circulation.The change procedure of one-period has been shown among the figure.Through repeatedly repeatedly, cylindrical shell top reaches 323K, and the bottom reaches 243K.
Utilize this principle, cold-storage liquid is formed a circulatory system through heat exchanger and water pump, just can become can the actual air-conditioning system of using.
Fig. 4 is the structural representation that is used for the magnetic refrigeration apparatus of electric automobile air-conditioning of the present invention; This kind magnetic refrigeration apparatus comprises magnetic refrigeration module 1, air conditioning HVAC assembly 2, air-conditioning duct 3, air-condition heat exchanger 4 and the circulatory system 5; Magnetic refrigerating system 1 is connected with air conditioning HVAC assembly 2 through air-conditioning duct 3; Air-condition heat exchanger 4 is connected with magnetic refrigeration module 1 with water circulating pump 5 through air-conditioning duct 3; Water circulating pump 5 is connected with magnetic refrigeration module 1 through air-conditioning duct 3, and magnetic refrigeration module 1, air conditioning HVAC assembly 2, air-conditioning duct 3, air-condition heat exchanger 4 and the circulatory system 5 form a closed-loop path.
Two air-conditioning ducts 3 are arranged between magnetic refrigeration module 1 and the air conditioning HVAC assembly 2, are cold water in one of them air-conditioning duct 3, are room temperature waters in another air-conditioning duct 3; In the air-conditioning duct 3 between magnetic refrigeration module 1 and the air-condition heat exchanger 4 is hot water.
The method of utilizing above-mentioned magnetic refrigeration apparatus to control is: by magnetic refrigeration module 1 generation cold water or hot water, pass through water circulating pump 5 increases then and flow, realize that the refrigeration of air-conditioning perhaps heats, thereby realization is lowered the temperature to air in the car and heated.
When needs freeze, hot water is led to air-condition heat exchanger 4 heat radiations, the heat exchanger that cold water leads in the air conditioning HVAC assembly 2 carries out refrigeration cool-down, plays the effect of air-conditioning temperature-reducing.
In the time of needs heating; The pump water direction of conversion cycle water pump 5 perhaps increases a four-way change-over valve in air-conditioning duct 3, cold water is led to the heat that air-condition heat exchanger 4 absorbs air; Hot water is led to the heat exchanger in the air conditioning HVAC assembly 2, air in the car is heated.
This kind is used for the magnetic refrigeration apparatus of electric automobile air-conditioning owing to adopt liquid agent for storage of coldness (water) to conduct heat; There is not the high-low pressure zone in magnetic refrigerating system, and with respect to the system of present vapour compression refrigeration method, its pipeline and heat exchanger can be simplified; Need not the withstand voltage pipeline of high strength and the heat exchanger of employing at present; The pipeline docking structure does not need the close tolerance seal structure yet, can use very simple tide of motorism water pipe, utilizes clamp connection to get final product.Simultaneously, adopt water (or water-ethylene glycol solution) as agent for storage of coldness, with low cost, it is convenient to replenish, and environment is not had any pollution, meets current social to requirements of green environmental protection.
Claims (6)
1. magnetic refrigeration apparatus that is used for the electric automobile air-conditioning; It is characterized in that: described magnetic refrigeration apparatus comprises magnetic refrigeration module (1), air conditioning HVAC assembly (2), air-conditioning duct (3), air-condition heat exchanger (4) and the circulatory system (5); Described magnetic refrigerating system (1) is connected with air conditioning HVAC assembly (2) through air-conditioning duct (3); Described air-condition heat exchanger (4) is connected with magnetic refrigeration module (1) with water circulating pump (5) through air-conditioning duct (3); Described water circulating pump (5) is connected with magnetic refrigeration module (1) through air-conditioning duct (3), and described magnetic refrigeration module (1), air conditioning HVAC assembly (2), air-conditioning duct (3), air-condition heat exchanger (4) and the circulatory system (5) form a closed-loop path.
2. a kind of magnetic refrigeration apparatus that is used for the electric automobile air-conditioning according to claim 1; It is characterized in that: between described magnetic refrigeration module (1) and the air conditioning HVAC assembly (2) two air-conditioning ducts (3) are arranged; One of them air-conditioning duct is a cold water in (3), and another air-conditioning duct is a room temperature water in (3).
3. a kind of magnetic refrigeration apparatus that is used for the electric automobile air-conditioning according to claim 2 is characterized in that: in the air-conditioning duct (3) between described magnetic refrigeration module (1) and the air-condition heat exchanger (4) is hot water.
4. method of utilizing the described magnetic refrigeration apparatus of each claim of claim 1-3 to control; It is characterized in that: produce cold water or hot water by magnetic refrigeration module (1); Then through water circulating pump (5) adjustment water (flow) direction; The refrigeration that realizes air-conditioning perhaps heats, thereby realization is lowered the temperature to air in the car and heated.
5. the method that magnetic refrigeration apparatus is controlled according to claim 4; It is characterized in that: when needs freeze; Hot water is led to air-condition heat exchanger (4) heat radiation, and the heat exchanger that cold water leads in the air conditioning HVAC assembly (2) carries out refrigeration cool-down, plays the effect of air-conditioning temperature-reducing.
6. the method that magnetic refrigeration apparatus is controlled according to claim 5; It is characterized in that: in the time of needs heating; The pump water direction of conversion cycle water pump (5); Cold water is led to the heat that air-condition heat exchanger (4) absorbs air, hot water is led to the heat exchanger in the air conditioning HVAC assembly (2), air in the car is heated.
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| CN201110272145A CN102305446A (en) | 2011-09-15 | 2011-09-15 | Magnetic refrigeration device for electric automobile air conditioner and control method for magnetic refrigeration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909818A (en) * | 2022-07-18 | 2022-08-16 | 南方科技大学 | Tin separating and combining device for nuclear heat insulation demagnetization refrigeration system |
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| CN202304066U (en) * | 2011-09-15 | 2012-07-04 | 芜湖博耐尔汽车电气系统有限公司 | Magnetic refrigeration device for air conditioner of electric automobile |
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2011
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6293106B1 (en) * | 2000-05-18 | 2001-09-25 | Praxair Technology, Inc. | Magnetic refrigeration system with multicomponent refrigerant fluid forecooling |
| FR2868153A1 (en) * | 2004-03-25 | 2005-09-30 | Peugeot Citroen Automobiles Sa | MAGNETIC REFRIGERATION SYSTEM AND METHOD FOR IMPLEMENTING THE SAME |
| CN1766463A (en) * | 2004-10-28 | 2006-05-03 | 四川大学 | Natural convection heat transfer type room-temperature magnetic Refrigerator |
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Cited By (1)
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| CN114909818A (en) * | 2022-07-18 | 2022-08-16 | 南方科技大学 | Tin separating and combining device for nuclear heat insulation demagnetization refrigeration system |
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Application publication date: 20120104 |