CN102230685B - Control method of pump energy-saving air conditioning unit with double power sources - Google Patents
Control method of pump energy-saving air conditioning unit with double power sources Download PDFInfo
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- CN102230685B CN102230685B CN 201110152404 CN201110152404A CN102230685B CN 102230685 B CN102230685 B CN 102230685B CN 201110152404 CN201110152404 CN 201110152404 CN 201110152404 A CN201110152404 A CN 201110152404A CN 102230685 B CN102230685 B CN 102230685B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004378 air conditioning Methods 0.000 title abstract description 10
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 70
- 239000011737 fluorine Substances 0.000 claims abstract description 70
- 238000005057 refrigeration Methods 0.000 claims abstract description 69
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 239000003507 refrigerant Substances 0.000 claims description 46
- 238000001816 cooling Methods 0.000 claims description 37
- 238000001035 drying Methods 0.000 claims description 21
- 238000001914 filtration Methods 0.000 claims description 19
- 230000009977 dual effect Effects 0.000 claims description 9
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 29
- 230000003750 conditioning effect Effects 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 150000002221 fluorine Chemical class 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a pump energy-saving air conditioning unit with double power sources and belongs to an air conditioning refrigerating unit, and the unit provided by the invention is mainly used for solving the problem of poor refrigerating effect of the compressor refrigerating unit under the low-temperature environment in the prior art. The fluorine pump energy-saving air conditioning unit with double power sources comprises a compressor refrigerating unit mainly consisting of a compressor, a condenser, a liquid accumulator, a dry filter, an evaporator and a gas-liquid separator, wherein the compressor, the condenser, the liquid accumulator, the dry filter, the evaporator and the gas-liquid separator are successively connected via a transmission pipeline; the gas-liquid separator is back connected with the compressor; and in addition, and the fluorine pump energy-saving air conditioning unit with the double power sources is also provided with a fluorine pump refrigerating unit connected with the transmission pipeline between the liquid accumulator and the dry filter in parallel. The invention also discloses a control method of the energy-saving air conditioning unit, and is mutually matched with the energy-saving air conditioning unit to freely switch two refrigerating units; the refrigeration effect of the fluorine pump conditioning unit under the low-temperature environment is greatly improved by the fluorine pump conditioning unit; and the cost is saved.
Description
Technical field
The present invention relates to a kind of energy-saving air conditioning system, specifically, relate to a kind of dual power source pump energy-saving type air conditioner unit and control method thereof.
Background technology
Development along with society; The quickening of process of industrialization, the shortage of resource, the deterioration of environment become human institute urgent problem, and countries in the world have all proposed the slogan of " protection environment, energy savings " in recent years; China also advocates energy-saving and emission-reduction energetically; Air-conditioning becomes the focus of all industries naturally as the energy consumption rich and influential family, and the exploitation environment-friendly and high-energy is imitated the air conditioner composition for the diligent target of pursuing of each Air-conditioning Enterprise.
What at present, the most frequently used energy-saving type air conditioner adopted is the compressor cooling unit.The compressor cooling unit utilizes the conversion between cold-producing medium gaseous state and the liquid state to realize heat absorption and heat release, thereby room air is realized refrigeration.The subject matter that this refrigeration unit exists is; When temperature is low in the winter time; Conversion energy consumption between cold-producing medium gaseous state and the liquid state is big, so cause its in when refrigeration efficiency low, cost is big, so the compressor cooling unit is when temperature is low in the winter time and be not suitable for large-scale promotion and application.
Summary of the invention
The object of the present invention is to provide a kind of dual power source pump energy-saving type air conditioner unit; In the system of existing compressor cooling unit; Increase the fluorine pump refrigeration unit of using when the suitable winter temperature of a cover hangs down; And realize two units freely switch use, the refrigeration problem that cost is big, efficiency is low when solving in the prior art compressor cooling unit temperature is low in the winter time.
In order to address the above problem, the technical scheme that the present invention adopts is following:
Dual power source pump energy-saving type air conditioner unit; Comprise the compressor cooling unit of mainly forming by the compressor that connects successively through transmission pipeline, condenser, reservoir, device for drying and filtering, evaporimeter and gas-liquid separator; And said gas-liquid separator is returned and is connected in compressor; Simultaneously, also be provided with the fluorine pump refrigeration unit parallelly connected with the transmission pipeline between the device for drying and filtering with said reservoir.
In the said equipment, condenser, reservoir, device for drying and filtering all are arranged at outdoor, and wherein, condenser is used for the cooling refrigeration agent, make its temperature reach suitable degree of carrying out heat exchange with room air; Reservoir is used for the unnecessary cold-producing medium of storage system, and the cold-producing medium that has capacity when guaranteeing system works uses; Device for drying and filtering is used for the cold-producing medium that passes through is carried out drying and filtration.And that compressor, evaporimeter, gas-liquid separator all are arranged at is indoor, and wherein, compressor is the power resources of compressor cooling pattern; Evaporimeter is to accomplish the capital equipment that carries out heat exchange with room air; Gas-liquid separator carries out gas-liquid separation to the cold-producing medium that comes out from evaporimeter, and gaseous refrigerant is sent into compressor and formed circulation, and liquid refrigerant then retains in the gas-liquid separator.
In order to prevent fluorine pump refrigeration unit when work, cold-producing medium is back in the fluorine pump refrigeration unit through the transmission pipeline between reservoir and the device for drying and filtering, on the transmission pipeline between said reservoir and the device for drying and filtering, also is provided with first check valve.
Further, be disposed with first magnetic valve and expansion valve on the transmission pipeline between said device for drying and filtering and the evaporimeter; Simultaneously, also be provided with the fluorine pump refrigerant tubing parallelly connected with the transmission pipeline between the evaporimeter, and this fluorine pump refrigerant tubing is provided with second magnetic valve with said device for drying and filtering.Through above-mentioned design; Just two transmission pipelines between device for drying and filtering and evaporimeter, have been formed; Article one, the cold-producing medium when being used to transmit compressor operating; Cold-producing medium when another is used to transmit the fluorine pump work has so just avoided two kinds of power sources the crossfire phenomenon to occur at the work schedule cryogen, has guaranteed carrying out smoothly of refrigeration work.In the present invention, when so-called crossfire phenomenon was meant compressor operating, cold-producing medium got in the transmission channel of fluorine pump refrigeration unit, and perhaps when fluorine pump refrigeration unit was worked, cold-producing medium got in the transmission channel of compressor cooling unit.
Again further, also be provided with between said evaporimeter and the condenser and compressor and the parallelly connected fluorine pump back flow of refrigerant pipeline of gas-liquid separator place branch road, this fluorine pump back flow of refrigerant pipeline is provided with second check valve.Setting through the fluorine pump back flow of refrigerant pipeline and second check valve; Both the passage that refluxes was provided for the cold-producing medium that comes out from evaporimeter; Avoided cold-producing medium to get into gas-liquid separator, prevented that again cold-producing medium passes back into gas-liquid separator through this fluorine pump back flow of refrigerant pipeline under the compressor operating state from evaporimeter.Simultaneously, on the branch road at compressor and gas-liquid separator place, be provided with and be used to prevent that cold-producing medium from getting into the 3rd check valve and the 3rd magnetic valve of compressor and gas-liquid separator, thus the control of flow of refrigerant direction when having realized to the fluorine pump work.
Further, said fluorine pump refrigeration unit comprises liquid-sighting glass, fluorine pump, permanent flow valve, flow switch and the 4th check valve that connects successively through transmission pipeline.Wherein, liquid-sighting glass is used to observe the cold-producing medium surplus in the reservoir; The fluorine pump is that cold-producing medium provides transmission power; Permanent flow valve is used to guarantee the constant of refrigerant flow; Flow switch is used to control the Push And Release of its place transmission pipeline; Cold-producing medium got into fluorine pump refrigeration unit when the 4th check valve had then prevented compressor operating, had controlled the flow direction of cold-producing medium under this pattern.
On the basis of above-mentioned hardware system, the present invention also provides the control method of this dual power source fluorine pump energy-saving type air conditioner unit, comprises following two kinds of mode of operations:
The compressor cooling pattern
(1) close second magnetic valve and fluorine pump, open first magnetic valve and the 3rd magnetic valve, start compressor, system gets into the compressor cooling pattern;
(2) compressor compresses gaseous refrigerant, and then it being sent into condenser condenses is liquid refrigerant;
(3) liquid refrigerant after the condensation is stored in the reservoir, and carries out decrease temperature and pressure by first magnetic valve entering expansion valve, gets into evaporimeter and room air again and carries out heat exchange;
(4) after the heat exchange, the liquid refrigerant in the evaporimeter becomes and is gaseous refrigerant, and gets into gas-liquid separator through the 3rd magnetic valve and carry out gas-liquid separation, and gaseous refrigerant is carried back compressor;
(5) circulation execution in step (2)～(4);
Fluorine pump refrigeration mode
(1) close first magnetic valve, the 3rd magnetic valve and compressor, open second magnetic valve, start the fluorine pump, system gets into fluorine pump refrigeration mode;
(2) the fluorine pump extracts liquid refrigerant in reservoir, and with this liquid refrigerant among second magnetic valve is sent into evaporimeter, carry out heat exchange with room air;
(3) after the heat exchange, the liquid refrigerant in the evaporimeter becomes and is gaseous refrigerant, and gets into condenser condenses through second check valve, is stored among the reservoir then;
(4) circulation execution in step (2)～(3).
In order to guarantee the aridity of cold-producing medium, prevent to exist in the cold-producing medium impurity simultaneously, said cold-producing medium also got into device for drying and filtering and carries out drying and filter before passing through first magnetic valve or second magnetic valve.
Design principle of the present invention is; Utilize different transfer of heat principle in the fluorine pump process of refrigerastion,, in existing compressor cooling unit, increase by a cover and be fit to the fluorine pump refrigeration unit that low temperature environment uses through design cleverly; Thereby utilize the operate as normal of a condenser and two refrigeration unit of an evaporimeter realization; And utilize a plurality of check valves and magnetic valve to come transmission pipeline is controlled, to realize freely switching of two refrigeration unit, ensure the operate as normal of whole unit.
Compared with prior art, beneficial effect of the present invention is following:
1. the principle of the invention is simple, designs ingeniously, and it is convenient to realize;
2. the present invention utilizes a condenser and evaporimeter to realize the operate as normal of two refrigeration unit in a cover system, compares with two refrigeration unit of independent use, has both reduced the volume of unit, has reduced production, operation and maintenance cost again;
3. the present invention has realized the operate as normal of two refrigeration unit and has freely switched in a cover system, changes refrigeration system when hanging down for temperature great convenience is provided;
4. the present invention is through the state of change system medium power source and magnetic valve; Easily realized freely switching of compressor cooling unit and fluorine pump refrigeration unit; Thereby realize that for low temperature environment uses fluorine pump refrigeration unit down refrigeration provides the operation basis, solved problems such as the cost that uses the compressor cooling unit to bring when temperature is low is high, efficiency is low;
5. the present invention has carried out constant current control through permanent flow valve to the flow of cold-producing medium, has guaranteed the constant of refrigerant flow under the fluorine pump refrigeration mode, thereby has guaranteed the stable of refrigeration, has improved the practical value of fluorine pump refrigeration unit.
Description of drawings
Fig. 1 is the prior art system theory diagram.
Fig. 2 is a system principle diagram of the present invention.
In the above-mentioned accompanying drawing, the corresponding name of Reference numeral is called: 1-compressor, 2-high-voltage switch gear, 3-ball valve, 4-the 3rd check valve, 5-condenser; The 6-pressure sensor, 7-the 5th check valve, 8-reservoir, 9-first check valve, 10-device for drying and filtering, 11-first magnetic valve; The 12-expansion valve, 13-evaporimeter, 14-the 3rd magnetic valve, 15-gas-liquid separator, 16-low tension switch, 17-fluorine pump; The 18-permanent flow valve, 19-flow switch, 20-the 4th check valve, 21-second magnetic valve, 22-second check valve, 23-liquid-sighting glass.
The specific embodiment
For the ease of forming contrast,, at first background technology of the present invention is elaborated at this with outstanding remarkable result of the present invention with the present invention.
The system principle diagram of compressor cooling unit is as shown in Figure 1 in the prior art.During work; Compressor and starting 1, first magnetic valve 11 and the 3rd magnetic valve 14; Compressor 1 will be from the gaseous refrigerant of the gaseous refrigerant boil down to HTHP of the low-temp low-pressure of gas-liquid separator 15; Under the control of high-voltage switch gear 2, ball valve 3 and the 3rd check valve 4, transfer to condenser 5 through transmission pipeline, cold-producing medium is condensed into the liquid of high normal pressure and temperature in condenser 5; Entering reservoir 8 under the control of pressure sensor 6 and the 5th check valve 7 then, and then under the dynamic action that compressor 1 continues to provide, the liquid refrigerant in the reservoir 8 gets into devices for drying and filtering 10 through first check valve 9 and filters; After this, the liquid refrigerant of normal temperature high voltage becomes the liquid refrigerant of low-temp low-pressure through behind first magnetic valve 11 and the expansion valve 12, and gets into evaporimeter 13 through transmission pipeline and carry out heat exchange, thereby makes it to form the gaseous refrigerant of low-temp low-pressure; At last, this gaseous refrigerant gets into gas-liquid separator 15 through the 3rd magnetic valve 14, and the liquid refrigerant that possibly contain in the gaseous refrigerant is separated, and the gaseous refrigerant after the separation gets into compressor 1 through low tension switch 16 again.So far, the whole compressor refrigeration unit just forms a circulatory system, as long as the compressor continuous firing, whole refrigeration system just continues circulation and goes down.
In the above-mentioned course of work; Because condenser 5, reservoir 8 and device for drying and filtering 10 all are installed on outdoor; First magnetic valve 11, expansion valve 12, evaporimeter 13, gas-liquid separator 15, compressor 1 etc. all are installed on indoor; Therefore, this process of gaseous refrigerant of the liquid refrigerant of low-temp low-pressure heat absorption becoming low-temp low-pressure is to carry out indoor.Liquid refrigerant and indoor air carry out heat exchange, become gaseous refrigerant after absorbing airborne heat, and room air are lowered the temperature owing to heat is absorbed, and has just realized the refrigeration of room air thus.
The course of work by the above-mentioned compressor refrigeration unit can find out, the key of existing techniques in realizing refrigeration is liquid state and the conversion of the heat absorption between the gaseous state that cold-producing medium carries out in evaporimeter, heat absorption more soon, many more, refrigeration is just good more.Significantly, the temperature difference is big more, and heat absorption must be more soon, many more, still, when air themperature is low in the winter time, the temperature difference of the temperature of cold-producing medium and room air and not quite in the evaporimeter 13, thus make refrigeration be difficult to satisfy actual needs.In this case, will cause cost to increase greatly if also use the compressor cooling unit to freeze, the present invention proposes in order to address the above problem just.
The present invention is elaborated with embodiment below in conjunction with accompanying drawing 2, embodiment of the present invention includes but not limited to the following example.
Embodiment
As shown in Figure 2, dual power source fluorine pump energy-saving type air conditioner unit is made up of compressor cooling unit and fluorine pump refrigeration unit.Wherein, Compressor cooling unit and prior art are identical; Fluorine pump refrigeration unit then is to be the basis with the compressor cooling unit, accomplishes with the compressor cooling unit through connected mode cleverly to be connected, and freely the switching of realization compressor cooling unit and fluorine pump refrigeration unit.The annexation and the course of work in the face of whole system is described in detail down.
See on the whole; Compressor 1, condenser 5, reservoir 8, device for drying and filtering 10, evaporimeter 13 and gas-liquid separator 15 are communicated with through transmission pipeline successively; And gas-liquid separator 15 also is communicated with compressor 1 through transmission pipeline, thereby makes all capital equipments form a loop capable of circulation.In order to guarantee that compressor cooling unit and fluorine pump refrigeration unit can realize refrigeration respectively, and can not influence each other,, on the basis of the said equipment, also be provided with following equipment according to the flow direction of cold-producing medium:
On the transmission pipeline between compressor 1 and the condenser 5, high-voltage switch gear 2, ball valve 2 and the 3rd check valve 4 are installed successively; On the transmission pipeline between condenser 5 and the reservoir 8, pressure sensor 6 and the 5th check valve 7 are installed successively; Between reservoir 8 and device for drying and filtering 10; Be provided with two branch roads; Wherein, one is the operating path of compressor cooling unit, and first check valve 9 mainly is installed; Another is the operating path of fluorine pump refrigeration unit, and liquid visor 23, fluorine pump 17, permanent flow valve 18, flow switch 19 and the 4th check valve 20 are installed successively; On the transmission pipeline between device for drying and filtering 10 and the evaporimeter 13; Also be provided with two branch roads; Wherein, one is the operating path of compressor cooling unit, and first magnetic valve 11 and expansion valve 12 mainly is installed; Another branch road is the operating path of fluorine pump refrigeration unit, and second magnetic valve 21 mainly is installed.After this, evaporimeter 13 is connected with condenser 5 through a transmission pipeline that second check valve 22 is installed on the one hand, makes fluorine pump refrigeration unit form a closed circuit; Be connected with gas-liquid separator 15 through a transmission pipeline that the 3rd magnetic valve 14 is installed on the other hand, and between gas-liquid separator 15 and compressor 1, low tension switch 16 be installed, thereby make the compressor cooling unit form a closed circuit.
Through above-mentioned setting, make compressor cooling unit and fluorine pump refrigeration unit form two refrigeration systems of a shared condenser and evaporimeter, and two refrigeration systems can freely switch, work alone.Control procedure in the face of above-mentioned two units specifies down.
One. the compressor cooling unit
The compressor cooling unit is mainly used in the indoor environment refrigeration of outdoor temperature when being higher than 7.5 ℃.During work, at first close the fluorine pump 17 and second magnetic valve 21, compressor and starting 1, first magnetic valve 11 and the 3rd magnetic valve 14 make the compressor cooling unit get into duty then, and thereafter detailed process and prior art are identical, are not giving unnecessary details at this.
Two. fluorine pump refrigeration unit
Fluorine pump refrigeration unit is a main innovate point of the present invention; Itself and compressor cooling unit are combined into after the dual power source fluorine pump energy-saving type air conditioner unit of the present invention; The realization of refrigeration when key technology is that fluorine pump refrigeration unit works alone, and and the compressor cooling unit between the problem that influences each other that possibly occur.The realization of above-mentioned key technology is described through the control procedure of describing fluorine pump refrigeration unit below.
Indoor temperature is generally about 24 ℃; And when outdoor temperature is lower than 7.5 ℃; Maintain an equal level through cold-producing medium after the condenser condenses and outdoor temperature, this moment, cold-producing medium just formed the great temperature difference with room air, and fluorine pump refrigeration unit is utilized condensation liquid refrigerant and the temperature difference between the room air afterwards just; Accomplish heat transmission, reach the purpose of refrigeration.
When outdoor temperature is lower than 7.5 ℃, at first carry out of the switching of compressor cooling unit to fluorine pump refrigeration unit, promptly close compressor 1, first magnetic valve 11 and the 3rd magnetic valve 14 are opened the fluorine pump 17 and second magnetic valve 21.Because compressor 1 quits work, and just no longer includes power resources in the unit, correspondingly cold-producing medium just stops to flow; And after first magnetic valve 11 cuts out, the transmission pipeline branch road at its place will be in off-state, thereby prevent that cold-producing medium from getting into evaporimeter 13 from this branch road; In like manner, closing of the 3rd magnetic valve 14 prevented that also cold-producing medium from getting into gas-liquid separator 15.And the unlatching of fluorine pump 17 just provides power for whole unit, and the cold-producing medium in each equipment and the transmission pipeline just begins to flow.Because change has taken place in the state of aforementioned equipment component, therefore, during 17 work of fluorine pump, the glide path of cold-producing medium during also with compressor operating the glide path of cold-producing medium different.
Specifically; After fluorine pump 17 is opened; After process device for drying and filtering 10 filters under the control of permanent flow valve 18, flow switch 19 and the 4th check valve 20 through the cold-producing medium after the condensation; Carry out heat exchange from the transmission pipeline entering evaporimeter 13 at second magnetic valve, 21 places with room air, take away the heat in the room air, accomplish the refrigeration purpose.Cold-producing medium after the heat absorption carries out condensation from the transmission pipeline entering condenser at second check valve, 22 places; And under the control of pressure sensor 6 and the 5th check valve 7 entering reservoir 8; Part retains in the reservoir 8; Part gets in the fluorine pump refrigeration unit, thereby forms the circulation of fluorine pump refrigeration unit.
In the course of work of fluorine pump refrigeration unit,, guaranteed the operate as normal of fluorine pump refrigeration unit because the unidirectional conducting control function of first check valve 9 has prevented that cold-producing medium from directly passing back into fluorine pump 17 through first check valve 9.
Through test, be lower than in outdoor temperature 7.5 ℃ environment down use compressor cooling unit indoor environment is freezed, its maximum refrigerating efficiency and uses fluorine pump refrigeration unit of the present invention to freeze about 3.5, maximum refrigerating efficiency can reach about 8.8.This shows; When outdoor temperature is low, use the refrigeration of fluorine pump refrigeration unit to be far superior to the compressor cooling unit, and when outdoor temperature is higher; Still use the compressor cooling unit to freeze; Therefore, realize that the present invention that two kinds of refrigeration unit successful group combining frees switch is far superior to prior art on refrigeration, have obvious improvement.
According to the foregoing description, just can realize the present invention well.
Claims (2)
1. the control method of dual power source pump energy-saving type air conditioner unit is characterized in that, comprises
The compressor cooling pattern
(1) close second magnetic valve and fluorine pump, open first magnetic valve and the 3rd magnetic valve, start compressor, system gets into the compressor cooling pattern;
(2) compressor compresses gaseous refrigerant, and then it being sent into condenser condenses is liquid refrigerant;
(3) liquid refrigerant after the condensation is stored in the reservoir, and carries out decrease temperature and pressure by first magnetic valve entering expansion valve, gets into evaporimeter and room air again and carries out heat exchange;
(4) after the heat exchange, the liquid refrigerant in the evaporimeter becomes and is gaseous refrigerant, and gets into gas-liquid separator through the 3rd magnetic valve and carry out gas-liquid separation, and gaseous refrigerant is carried back compressor;
(5) circulation execution in step (2)～(4);
Fluorine pump refrigeration mode
(1) close first magnetic valve, the 3rd magnetic valve and compressor, open second magnetic valve, start the fluorine pump, system gets into fluorine pump refrigeration mode;
(2) the fluorine pump extracts liquid refrigerant in reservoir, and with this liquid refrigerant among second magnetic valve is sent into evaporimeter, carry out heat exchange with room air;
(3) after the heat exchange, the liquid refrigerant in the evaporimeter becomes and is gaseous refrigerant, and gets into condenser condenses through second check valve, is stored among the reservoir then;
(4) circulation execution in step (2)～(3).
2. the control method of dual power source pump energy-saving type air conditioner unit according to claim 1 is characterized in that, said cold-producing medium also got into device for drying and filtering and carries out drying and filter before passing through first magnetic valve or second magnetic valve.
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| CN102230685A (en) | 2011-11-02 |
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