CN102620464A - Low-temperature strong-heat multi-split air conditioning system - Google Patents
Low-temperature strong-heat multi-split air conditioning system Download PDFInfo
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- CN102620464A CN102620464A CN2012100838081A CN201210083808A CN102620464A CN 102620464 A CN102620464 A CN 102620464A CN 2012100838081 A CN2012100838081 A CN 2012100838081A CN 201210083808 A CN201210083808 A CN 201210083808A CN 102620464 A CN102620464 A CN 102620464A
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- 238000004378 air conditioning Methods 0.000 title abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 239000003507 refrigerant Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 abstract description 19
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000010725 compressor oil Substances 0.000 abstract 3
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000002826 coolant Substances 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 5
- 230000009102 absorption Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to a low-temperature strong-heat multi-split air conditioning system, in particular to a multi-split heat pump system capable of improving the heating capacity under the condition of low ambient temperature. The system comprises a primary compressor, a primary compressor oil separator, a four-way valve, an outdoor heat exchanger, an outdoor electronic expansion valve, a liquid pipe stop valve, a gas pipe stop valve, a first secondary heating auxiliary electromagnetic valve, a gas-liquid separator, a secondary compressor oil separator, a secondary compressor backflow-preventing one-way valve, a second secondary heating auxiliary electromagnetic valve and a flash evaporator primary compressor oil return capillary tube. On the basis of slightly changing an air conditioner outdoor unit system, the low-temperature strong heat system not only can ensure that the compressor can reliably and safely operate, but also greatly improves the heating capacity of the air conditioner heat pump system in a low-temperature environment, ensures the indoor temperature comfort in the low-temperature environment, and has the characteristics of good compatibility, easiness in realization and energy conservation.
Description
Technical field
The present invention relates to the air-conditioning heat pump field, particularly a kind of multiple heat pump that can improve heating capacity under the low ambient temperature condition belongs to the innovative technology of the many on-line systems of low temperature heat-flash type.
Background technology
Air source heat pump is along with the reduction of environment temperature, and heating capacity and heating efficiency constantly reduce, and the reduction along with environment temperature constantly increases and people are to the demand of heating capacity.Air-conditioned room generally all is to select the air-conditioning unit according to the cooling load size, in the use of reality, often occur " refrigerating capacity meets the demands, and the not enough phenomenon of heating capacity ".Its main cause is a normal air source heat pump when under low temperature environment, working, and the delivery temperature of compressor can surpass the working range that compressor allows, and frequent start and stop appear in compressor, can't operate as normal; When environment temperature dropped to below 5 ℃, airborne steam can form frost layer on the surface of evaporimeter, and the coefficient of heat transfer of evaporimeter is reduced, and heat pump needs continuous defrost to guarantee the normal operation of system and greatly reduces air-conditioning user's comfortableness; In addition, heat pump is in order to absorb heat from outdoor air, and its evaporating temperature will drop to lower; This moment, the inspiratory volume of compressor increased, and system's refrigerant circulation reduces, and the pressure ratio of compressor increases; Volumetric efficiency descends, and heat pump heating capacity and Energy Efficiency Ratio will significantly reduce.The heating capacity that worst cold case improves air source heat pump down is the difficult problem that air-conditioning circle need solve all the time.
Many online a kind of patterns that belong to air source heat pump heat under the low temperature environment in the winter time and also have the problems referred to above.In order to improve the heating capacity of many on-line systems under the worst cold case; The air-conditioning heat pump researcher has done a large amount of work in this respect; Enterprise has released the many on-line systems of low temperature heat-flash type in recent years successively in the industry; Adopted accurate two-stage compression system mostly, also had, released the real many on-line systems of two stages of compression through increasing the mode of supplementary module.But system need be connected with host module through intermediate duct during on-the-spot the installation because its secondary compression module is provided with separately, causes floor space to increase, and has increased installation difficulty; System can't realize outer many parallel connections of machine of big number, can not satisfy the requirement of bigger load; In addition, this system heat sources side is air-cooled heat exchange, and heat exchange mode is too simple.
Summary of the invention
To the how online deficiency of low temperature heat-flash, the present invention proposes a kind ofly can realize many parallel connections, and heat source side can adopt the cold heat exchange of wind (water), and the firsts and seconds compressibility many on-line systems of low temperature heat-flash type in the same structure that coexist.
Technical scheme of the present invention is: the many on-line systems of low temperature heat-flash type of the present invention; Including a stage compressor, one-level press oil eliminator, cross valve, outdoor heat exchanger, outdoor electric expansion valve, liquid pipe stop valve, tracheae stop valve, first secondary heats pilot solenoid valve, gas-liquid separator, split-compressor, secondary press oil eliminator, secondary press anti-backflow check valve, second secondary and heats pilot solenoid valve, flash vessel one-level press oil return capillary; Wherein a stage compressor is connected with first interface of cross valve through one-level press oil eliminator; Second interface of cross valve is connected with outdoor heat exchanger; The 3rd interface of cross valve is connected with gas-liquid separator; The 4th interface of cross valve heats pilot solenoid valve through first secondary that is connected in series and the tracheae stop valve is connected with indoor electric expansion valve; Indoor electric expansion valve is connected with indoor heat exchanger; The 4th interface of cross valve also heats pilot solenoid valve through second secondary and is connected with flash vessel; And one-level press oil eliminator is connected with a stage compressor through one-level press oil return capillary, and outdoor heat exchanger is connected with indoor electric expansion valve through outdoor electric expansion valve and liquid pipe stop valve, and the tracheae stop valve heats between the pilot solenoid valve with first secondary and also is connected with secondary press oil eliminator through secondary press anti-backflow check valve; Secondary press oil eliminator is connected with split-compressor, and split-compressor is connected with flash vessel.
Above-mentioned outdoor heat exchanger also heats auxiliary check valve through secondary and is connected with flash vessel.
Also be connected with flash vessel between above-mentioned outdoor electric expansion valve and the liquid pipe stop valve through level two hydrojet electric expansion valve.
Above-mentioned secondary press oil eliminator is connected with split-compressor through secondary press oil return capillary.
Also be connected with the anti-refrigerant refluence check valve of one-level press between above-mentioned one-level press oil eliminator and the cross valve.
Above-mentioned each stage compressor adopts single big discharge capacity varying capacity press, or adopts a plurality of float quantitative change capacity press and the combination of float amount constant speed press.
Air-conditioning system of the present invention; The air-conditioner outdoor unit system is being carried out on the basis of less change; Can make that not only compressor can reliable and securely move; And realized air conditioner heat pump system the increasing substantially of heating capacity under low temperature environment, guaranteed temperature comfortableness indoor under the low temperature environment, have compatible good, be easy to realize, energy-conservation characteristics.In addition,, reduced the floor space of outer machine system, simplified installation process because the firsts and seconds compressibility coexists in the same structure.And heat source side adopts air-cooled/water-cooled heat exchange mode, enlarged the scope of application of the many on-line systems of this low temperature heat-flash type.The many on-line systems of this low temperature heat-flash type have increased split-compressor, flash vessel, auxiliary check valve, associated electrical expansion valve and magnetic valve on the basis of the many on-line systems of routine; Pass through reasonable configuration; Make up two-stage compression system, and, can be implemented in the two stages of compression circulation under the low temperature environment through corresponding control logic; Guarantee that not only air-conditioning system can be stablized, reliability service; Also can improve heating capacity how online under the low temperature environment greatly, even make that indoor temperature still can satisfy the human comfort requirement under low temperature environment.
Description of drawings:
Fig. 1 is many on-line systems of secondary compression low temperature heat-flash figure of the present invention.
The specific embodiment
Embodiment:
Structural representation of the present invention is as shown in Figure 1, in order to say something and the simplification system, has only provided the scheme of two off-premises station parallel connections in the accompanying drawing, can carry out more parallel connection according to this principle if needed.
The many on-line systems of low temperature heat-flash type of the present invention; Including a stage compressor 1, one-level press oil eliminator 2, cross valve 4, outdoor heat exchanger 5, outdoor electric expansion valve 6, liquid pipe stop valve 7, tracheae stop valve 8, first secondary heats pilot solenoid valve 9, gas-liquid separator 10, split-compressor 11, secondary press oil eliminator 12, secondary press anti-backflow check valve 13, second secondary and heats pilot solenoid valve 14, flash vessel 15, one-level press oil return capillary 17; Wherein a stage compressor 1 is connected with first interface of cross valve 4 through one-level press oil eliminator 2; Second interface of cross valve 4 is connected with outdoor heat exchanger 5; The 3rd interface of cross valve 4 is connected with gas-liquid separator 10; The 4th interface of cross valve 4 heats pilot solenoid valve 9 through first secondary that is connected in series and tracheae stop valve 8 is connected with indoor electric expansion valve 20; Indoor electric expansion valve 20 is connected with indoor heat exchanger 21; The 4th interface of cross valve 4 also heats pilot solenoid valve 14 through second secondary and is connected with flash vessel 15; And one-level press oil eliminator 2 is connected with a stage compressor 1 through one-level press oil return capillary 17, and outdoor heat exchanger 5 is connected with indoor electric expansion valve 20 through outdoor electric expansion valve 6 and liquid pipe stop valve 7, and tracheae stop valve 8 heats between the pilot solenoid valve 9 with first secondary and also is connected with secondary press oil eliminator 12 through secondary press anti-backflow check valve 13; Secondary press oil eliminator 12 is connected with split-compressor 11, and split-compressor 11 is connected with flash vessel 15.
In addition, above-mentioned outdoor heat exchanger 5 also heats through secondary and assists check valve 16 to be connected with flash vessel 15.
In addition, also be connected with flash vessel 15 between above-mentioned outdoor electric expansion valve 6 and the liquid pipe stop valve 7 through level two hydrojet electric expansion valve 19.
In the present embodiment, above-mentioned secondary press oil eliminator 12 is connected with split-compressor 11 through secondary press oil return capillary 18.
In the present embodiment, also be connected with the anti-refrigerant refluence check valve 3 of one-level press between above-mentioned one-level press oil eliminator 2 and the cross valve 4.
Above-mentioned each stage compressor adopts single big discharge capacity varying capacity press, or adopts a plurality of float quantitative change capacity press and the combination of float amount constant speed press.
Operation principle of the present invention is following: in the process of refrigerastion, this system is consistent with the method for operation of conventional many on-line systems, and the secondary compressibility quits work.Concrete operation principle is: the oil of the HTHP after a stage compressor 1 will compress and refrigerant mixture drain into one-level press oil eliminator 2; Oil eliminator separates the back with oil and sends a stage compressor 1 back to through one-level press oil return capillary 17; Gaseous coolant is then through 5 condensations of cross valve 4 inlet chamber external heat exchangers; Then through the gas through indoor heat exchanger 21 evaporation heat absorptions becoming low-temp low-pressure after the electric expansion valve 20 throttling step-downs in outdoor electric expansion valve 6, liquid pipe stop valve 7 inlet chambers; After process tracheae stop valve 8, first secondary heat pilot solenoid valve 9, gas-liquid separator 10, cross valve 4, get back to a stage compressor, accomplish a complete kind of refrigeration cycle.
Heat in the process, when pressure at expulsion during greater than 2.0MPa, system's heating capacity can satisfy the indoor heating requirement, and the secondary compressibility of this system is still out of service.Concrete operation principle is: high temperature high pressure oil after a stage compressor 1 will compress and refrigerant mixture drain into one-level press oil eliminator 2; Oil eliminator separates the back with oil and sends a stage compressor 1 back to through one-level press oil return capillary 17; Gaseous coolant then heats pilot solenoid valve 9, tracheae stop valve 8, gets into indoor heat exchanger 21 and carry out the condensation heat release through cross valve 4, first secondary; Through indoor electric expansion valve 20, liquid pipe stop valve 7; Gas-liquid two-phase refrigerant inlet chamber external heat exchanger 5 through outdoor electric expansion valve 6 throttling step-downs becoming low-temp low-pressure evaporates heat absorption then; Gaseous coolant after the evaporation gets into gas-liquid separators 10 through cross valve 4 fully, finally gets back to a stage compressor, accomplishes one and complete heats circulation.
Heat in the process, when pressure at expulsion is lower than 2.0MPa, show that system's heating capacity is not enough to satisfy the indoor comfort requirement, need to open the secondary compressibility and come the elevator system heating capacity.Concrete operation principle is: medium temperature and medium pressure oil and refrigerant mixture after a stage compressor 1 will compress drain into one-level press oil eliminator 2; Oil eliminator separates the back with oil and sends a stage compressor 1 back to through one-level press oil return capillary 17; First secondary heated pilot solenoid valve 9 and closed this moment; Second secondary heats pilot solenoid valve 14 and opens; The gaseous coolant of discharging from oil eliminator heats pilot solenoid valve 14 through second secondary after through cross valve 4; Mixes with the saturated gaseous coolant after level two hydrojet electric expansion valve 19 gets into flash vessels 15 gas-liquid separations, reduce the HTHP refrigerant that gets into after the temperature after split-compressor 11, the compression and get into indoor heat exchanger 21 and carry out the condensation heat release, the indoor electric expansion valve of process 20, liquid pipe stop valve 7; The outdoor electric expansion valve 6 of this moment is closed; Gas-liquid two-phase refrigerant through liquid pipe stop valve 7 all heats auxiliary check valve 16 through the liquid refrigerants after 15 gas-liquid separations of level two hydrojet electric expansion valve 19 entering flash vessels through secondary, is evaporating heat absorption through after the distributor throttling step-down that links to each other with outdoor parallel operation through outdoor heat exchanger 5, and the gaseous coolant after the evaporation is through cross valve 4 entering gas-liquid separators 10 fully; Finally get back to a stage compressor, accomplish one and complete heat circulation.The compression ratio of one-level, split-compressor is relatively low in this cyclic process, has guaranteed that press at different levels can efficiently move; The reasonable utilization of flash vessel, the delivery temperature that guarantees the secondary press and have improved the refrigerant circulation of system in allowed limits, have increased system's heating capacity, have guaranteed the comfort level of indoor occupant.
The present invention is not limited to above-mentioned embodiment, in the scope that does not break away from inventive concept, also can suitably change design.
Claims (6)
1. many on-line systems of low temperature heat-flash type; It is characterized in that including a stage compressor (1), one-level press oil eliminator (2), cross valve (4), outdoor heat exchanger (5), outdoor electric expansion valve (6), liquid pipe stop valve (7), tracheae stop valve (8), first secondary heats pilot solenoid valve (9), gas-liquid separator (10), split-compressor (11), secondary press oil eliminator (12), secondary press anti-backflow check valve (13), second secondary and heats pilot solenoid valve (14), flash vessel (15), one-level press oil return capillary (17); Wherein a stage compressor (1) is connected with first interface of cross valve (4) through one-level press oil eliminator (2); Second interface of cross valve (4) is connected with outdoor heat exchanger (5); The 3rd interface of cross valve (4) is connected with gas-liquid separator (10); The 4th interface of cross valve (4) heats pilot solenoid valve (9) through first secondary that is connected in series and tracheae stop valve (8) is connected with indoor electric expansion valve (20); Indoor electric expansion valve (20) is connected with indoor heat exchanger (21); The 4th interface of cross valve (4) also heats pilot solenoid valve (14) through second secondary and is connected with flash vessel (15); And one-level press oil eliminator (2) is connected with a stage compressor (1) through one-level press oil return capillary (17); Outdoor heat exchanger (5) is connected with indoor electric expansion valve (20) through outdoor electric expansion valve (6) and liquid pipe stop valve (7); Tracheae stop valve (8) heats between the pilot solenoid valve (9) with first secondary and also is connected with secondary press oil eliminator (12) through secondary press anti-backflow check valve (13); Secondary press oil eliminator (12) is connected with split-compressor (11), and split-compressor (11) is connected with flash vessel (15).
2. the many on-line systems of low temperature heat-flash type according to claim 1 is characterized in that above-mentioned outdoor heat exchanger (5) also heats auxiliary check valve (16) through secondary and is connected with flash vessel (15).
3. the many on-line systems of low temperature heat-flash type according to claim 1 is characterized in that also being connected with flash vessel (15) through level two hydrojet electric expansion valve (19) between above-mentioned outdoor electric expansion valve (6) and the liquid pipe stop valve (7).
4. the many on-line systems of low temperature heat-flash type according to claim 1 is characterized in that above-mentioned secondary press oil eliminator (12) is connected with split-compressor (11) through secondary press oil return capillary (18).
5. the many on-line systems of low temperature heat-flash type according to claim 1 is characterized in that also being connected with between above-mentioned one-level press oil eliminator (2) and the cross valve (4) the anti-refrigerant refluence check valve (3) of one-level press.
6. the many on-line systems of low temperature heat-flash type according to claim 1 is characterized in that above-mentioned each stage compressor adopts single big discharge capacity varying capacity press, or adopt a plurality of float quantitative change capacity press and the combination of float amount constant speed press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100838081A CN102620464A (en) | 2012-03-27 | 2012-03-27 | Low-temperature strong-heat multi-split air conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100838081A CN102620464A (en) | 2012-03-27 | 2012-03-27 | Low-temperature strong-heat multi-split air conditioning system |
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| CN102620464A true CN102620464A (en) | 2012-08-01 |
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| CN2012100838081A Pending CN102620464A (en) | 2012-03-27 | 2012-03-27 | Low-temperature strong-heat multi-split air conditioning system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001056156A (en) * | 1999-06-11 | 2001-02-27 | Daikin Ind Ltd | Air conditioning apparatus |
| CN2884061Y (en) * | 2005-12-23 | 2007-03-28 | 中国科学院理化技术研究所 | Parallel compressor low-temperature air source heat pump device capable of realizing two-stage compression |
| CN101317046A (en) * | 2005-11-30 | 2008-12-03 | 大金工业株式会社 | Freezing device |
| EP2088388A1 (en) * | 2008-02-06 | 2009-08-12 | STIEBEL ELTRON GmbH & Co. KG | Heat pump system |
-
2012
- 2012-03-27 CN CN2012100838081A patent/CN102620464A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001056156A (en) * | 1999-06-11 | 2001-02-27 | Daikin Ind Ltd | Air conditioning apparatus |
| CN101317046A (en) * | 2005-11-30 | 2008-12-03 | 大金工业株式会社 | Freezing device |
| CN2884061Y (en) * | 2005-12-23 | 2007-03-28 | 中国科学院理化技术研究所 | Parallel compressor low-temperature air source heat pump device capable of realizing two-stage compression |
| EP2088388A1 (en) * | 2008-02-06 | 2009-08-12 | STIEBEL ELTRON GmbH & Co. KG | Heat pump system |
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Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Applicant after: MIDEA GROUP Co.,Ltd. Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6 Applicant before: Midea Group |
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Application publication date: 20120801 |