CN101776308B - Energy-saving air conditioner - Google Patents
Energy-saving air conditioner Download PDFInfo
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- CN101776308B CN101776308B CN2009100366036A CN200910036603A CN101776308B CN 101776308 B CN101776308 B CN 101776308B CN 2009100366036 A CN2009100366036 A CN 2009100366036A CN 200910036603 A CN200910036603 A CN 200910036603A CN 101776308 B CN101776308 B CN 101776308B
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- 238000004781 supercooling Methods 0.000 claims abstract description 60
- 239000003507 refrigerant Substances 0.000 claims abstract description 45
- 238000004378 air conditioning Methods 0.000 claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims description 21
- 239000012530 fluid Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention provides an energy-saving air conditioning device, which improves the performance of the whole air conditioning unit and the reliability of the whole air conditioning unit by controlling the supercooling degree/the superheat degree of an air conditioning system. The air conditioner comprises a control system, an air conditioner outdoor unit, an air conditioner indoor unit and a plurality of refrigerant pipelines connected between the air conditioner outdoor unit and the air conditioner indoor unit; the air conditioner outdoor unit comprises a compressor, an outdoor unit heat exchanger and a throttling device, and is connected through a plurality of refrigerant pipelines; the indoor unit of the air conditioner comprises an indoor unit heat exchanger; the air conditioner outdoor unit is provided with a device for improving the supercooling degree and comprises a throttling mechanism and a heat exchange mechanism; the supercooling degree improving device is connected with one of the refrigerant pipelines of the air conditioner outdoor unit, and the refrigerant pipeline connected with the supercooling degree improving device is branched into: an auxiliary branch and a main branch; the throttling mechanism is arranged on the auxiliary branch, and the auxiliary branch and the main branch are converged at the heat exchange mechanism and carry out heat exchange; the auxiliary branch is connected with the low-pressure side of the compressor.
Description
Technical field
The invention belongs to air-conditioning technical field, be specifically related to a kind of novel energy-saving air-conditioning device that can improve degree of supercooling/degree of superheat.
Background technology
Pressure-enthalpy chart according to air-conditioning system can be known; Degree of supercooling is big more, and the refrigerating capacity of air-conditioning system is just big more, and the existing device that is applied in the similar raising degree of supercooling on the air-conditioning mainly contains two kinds; The first realizes through extraneous cold water; In practical application, increase a water route circulation because of more, to the user use and installation brings inconvenience, seldom in the common air-conditioning system, use.It two is degree of supercooling degrees of superheat that high-voltage tube and the temperature difference between the low-voltage tube and pressure sensor, temperature sensor and control module through system are controlled machine system; The control system complex; Cost is high, therefore often only uses how online the grade on the type, and common air-conditioning is seldom used.
Because of all carrying out the high energy efficiency product in present each field; Wherein air conditioner industry is also being drafted the minimum efficiency threshold of execution; Simply improved the cold degree of superheat through increasing the air conditioner two-unit heat exchange area, not only the cost increase is very big thereby reach the method that improves efficiency, and the size of complete machine also increases.
Therefore, design a kind of desirable energy-saving air-conditioning device that can improve degree of supercooling/degree of superheat, be very important.
Summary of the invention
The object of the present invention is to provide a kind of energy-saving air-conditioning device, improve the performance of air conditioner, and improve the reliability of complete machine through the degree of supercooling/degree of superheat of control air-conditioning system.
The present invention realizes through following technical scheme:
A kind of energy-saving air-conditioning device includes control system, air-conditioner outdoor unit, indoor apparatus of air conditioner and is connected in many refrigerant pipes between said air-conditioner outdoor unit, the indoor set; Refrigerant circulates in said refrigerant pipe; Said air-conditioner outdoor unit includes compressor, off-premises station heat exchanger and throttling arrangement, and said compressor, off-premises station heat exchanger and throttling arrangement all connect through many refrigerant pipes; Said indoor apparatus of air conditioner includes the indoor set heat exchanger; Said air-conditioner outdoor unit is provided with and improves the degree of supercooling device, and said raising degree of supercooling device includes throttle mechanism and heat exchange mechanisms; Said raising degree of supercooling device is connected with wherein refrigerant pipe of said air-conditioner outdoor unit, and the refrigerant pipe that said connection improves the degree of supercooling device is branched off into: auxiliary branch and primary flow path; Said throttle mechanism is a kind of electric expansion valve or capillary and is arranged on the auxiliary branch; Said heat exchange mechanisms be a kind of be to adopt double pipe heat exchanger or the parallel welded type heat exchanger of a kind of copper pipe; The initiating terminal of said auxiliary branch links to each other with the port of export of outdoor heat exchanger; Being connected with compressor inlet by end of said auxiliary branch, said primary flow path initiating terminal links to each other with the port of export of outdoor heat exchanger, and the end that ends of said primary flow path links to each other with throttling arrangement.
To sum up, the invention has the beneficial effects as follows:
A kind of energy-saving air-conditioning device of patent application of the present invention; The raising degree of supercooling device of its setting; Not only can improve the degree of supercooling of condenser side, improve complete machine capability, can improve the suction side degree of superheat of compressor simultaneously; Can effectively prevent the difficult problem of compressor band liquid when worst cold case moves, therefore adopt this device that machine performance and reliability are all improved a lot.
The present technique scheme specifically has the following advantages:
1, the degree of supercooling of unit condenser side can be improved, the complete machine performance can be improved;
2, can improve the degree of superheat of suction side, especially during cold operation, can effectively prevent the operation of compressor band liquid, can improve the reliability of complete machine;
3, improving the degree of supercooling device all is suitable in single cooler group and source pump;
4, compact conformation, easy for installation, improving the degree of supercooling device can independently be installed on the off-premises station as parts, need not on unit, to increase extra water route circulation.Can on the contour structures basis of invariable of former organic type, increase this degree of supercooling device;
5, control is simple, need not complicated control program, also need not to consider to connect how many indoor sets;
6, cost is low, saves raw material.If aircondition is provided with all temps sensor and pressure sensor, accurately control, cost is lower.
Description of drawings
Fig. 1 is the raising degree of supercooling apparatus structure sketch map of a kind of energy-saving air-conditioning device of the present invention;
Fig. 2 is the pressure-enthalpy chart of a kind of energy-saving air-conditioning device of the present invention;
Fig. 3 is that the heat exchange mechanisms structural representation of a kind of energy-saving air-conditioning device of the present invention is little
Fig. 4 is the another kind of structural representation of the heat exchange mechanisms of a kind of energy-saving air-conditioning device of the present invention;
Fig. 5 is the concrete installation site sketch map of raising degree of supercooling device in single cold air conditioning system of a kind of energy-saving air-conditioning device of the present invention;
Fig. 6 is the concrete installation site sketch map of raising degree of supercooling device in heat pump type air conditioning system of a kind of energy-saving air-conditioning device of the present invention.
Description of reference numerals:
10, improve the degree of supercooling device, 11, throttle mechanism, 12, heat exchange mechanisms, 13, auxiliary branch, 20, primary flow path, 121, sleeve pipe; 15, side-walls, 30, compressor, 32, gas-liquid separator, 31, oil eliminator, 40, cross valve; 50, off-premises station heat exchanger, 60, check valve apparatus, 61, first check valve, the 63, the 3rd check valve, 62, second check valve; 64, the 4th check valve, 70, the high pressure fluid reservoir, 91, first stop valve, 92, second stop valve, 100, the indoor set heat exchanger.
The specific embodiment
The present invention discloses a kind of energy-saving air-conditioning device, and is as shown in Figure 1, includes control system, air-conditioner outdoor unit, indoor apparatus of air conditioner and is connected in many refrigerant pipes between said air-conditioner outdoor unit, the indoor set; Refrigerant circulates in said refrigerant pipe; Said air-conditioner outdoor unit includes compressor, off-premises station heat exchanger and throttling arrangement, and said compressor, off-premises station heat exchanger and throttling arrangement all connect through many refrigerant pipes; Said indoor apparatus of air conditioner includes the indoor set heat exchanger; Wherein: said air-conditioner outdoor unit is provided with and improves degree of supercooling device 10, and said raising degree of supercooling device includes throttle mechanism 11 and heat exchange mechanisms 12; Said raising degree of supercooling device is connected with wherein refrigerant pipe of said air-conditioner outdoor unit, and the refrigerant pipe that said connection improves the degree of supercooling device is branched off into: auxiliary branch 13 and primary flow path 20; Said throttle mechanism 11 is arranged on the auxiliary branch 13, and said auxiliary branch 13 converges at heat exchange mechanisms 12 places with primary flow path 20 and carries out heat exchange; Said auxiliary branch 13 is connected with the compressor low-pressure side.
Said throttle mechanism 11 is a kind of electric expansion valve or capillary.
The benefit of electric expansion valve is to carry out real-time regulated to the size of degree of supercooling, more is applicable to capacity-variable air conditioner systems such as how online, frequency changer; Fixed frequency air conditioner system for common one-to-one can select the cheap capillary-compensated of price comparison for use, and shortcoming is can only confirm a degree of supercooling with capillary, can't carry out range regulation to degree of supercooling.
Said heat exchange mechanisms 12 for a kind of be to adopt double pipe heat exchanger or the parallel welded type heat exchanger of a kind of copper pipe.
As shown in Figure 3, said heat exchange mechanisms 12 adopts the double-tube heat exchanger structure, and primary flow path 20 is passed the middle part of said heat exchange mechanisms 12, and auxiliary branch 13 is communicated with sleeve pipe 121, and sleeve pipe 121 is nested in primary flow path 20 outsides; The appearance of sleeve pipe 121 is incubated with the heat-preservation cotton parcel.
As shown in Figure 4, said heat exchange mechanisms 12 adopts the parallel welded type heat exchanger structure of copper pipe, and primary flow path 20 is two parallel copper pipes with auxiliary branch 13, and the side-walls 15 of said primary flow path 20 and auxiliary branch 13 adopts the mode of welding to be connected; The appearance of said primary flow path 20 and auxiliary branch 13 is incubated with the heat-preservation cotton parcel.
The size of said heat exchange mechanisms 12 can be confirmed according to the size of actual type and the degree of supercooling of needs.
As shown in Figure 2, can know that from pressure-enthalpy chart degree of supercooling is from Δ T=T
3-T
4Bring up to Δ T '=T
3-T
4' complete machine capability also brings up to Q '=A * (h from Q=A * (h1-h5)
1-h
5'), simultaneously because of after bypass branch road and the primary flow path heat exchange, bypass branch road temperature can increase, and has improved suction temperature with air-breathing the mixing after the entering suction side, thereby has improved the degree of superheat of suction side, has improved the reliability of air conditioner.
Among Fig. 2, ordinate P refers to system pressure, and abscissa h refers to the enthalpy of system's each point.
1 → 2nd, the compression process of compressor, 2 → 4th, condensation process, 4 → 5th, throttling process, 5 → 1st, evaporation process, T representes the refrigerant temperature of certain point, and Δ T representes degree of supercooling, and h representes the refrigerant enthalpy of certain point, and A representes the refrigerant mass flow, Q representes refrigerating capacity.
Embodiment one:
As shown in Figure 5, said aircondition is a kind of single cold air conditioning system, and the low-pressure side of compressor 30 is provided with gas-liquid separator 32, and the high-pressure side of compressor 30 is provided with oil eliminator 31; Indoor set heat exchanger 100 is connected with said gas-liquid separator 32, and off-premises station heat exchanger 50 is connected with said oil eliminator 31.
Connect through stop valve 91,92 between said air-conditioner outdoor unit, the indoor apparatus of air conditioner.
The port of export of said off-premises station heat exchanger 50 connects a high pressure fluid reservoir 70, and said off-premises station heat exchanger 50 connects the inlet of high pressure fluid reservoir 70; Improving degree of supercooling device 10 is connected with the outlet of said high pressure fluid reservoir 70.
Said auxiliary branch 13 connects gas-liquid separator 32 through after the heat exchange mechanisms 12; Primary flow path 20 is connected with throttling arrangement 80 through after the heat exchange mechanisms 12.
Embodiment two:
As shown in Figure 6; Said aircondition is a kind of heat pump type air conditioning system; Be with single cold air conditioning system difference: said aircondition is provided with a cross valve 40, and 4 interfaces of said cross valve 40 connect respectively: indoor set heat exchanger 100, gas-liquid separator 32, oil eliminator 31 and off-premises station heat exchanger 50.
Said aircondition is provided with check valve apparatus 60, and said check valve apparatus 60 includes two groups of check valve assemblies that are connected in parallel, that is: check valve assembly one and check valve assembly two; Said check valve assembly one includes first check valve 61 and the 3rd check valve 63 of reverse setting, and said check valve assembly two includes second check valve 62 and the 4th check valve 64 of reverse setting; The inlet of high pressure fluid reservoir 70 and primary flow path 20 connect the centre position of said check valve assembly one and check valve assembly two respectively.
Aircondition of the present invention; Essence is exactly to increase an auxiliary branch at condensator outlet; Refrigerant in the auxiliary branch carries out heat exchange through throttling step-down cooling back with primary flow path; Reduce the temperature of primary flow path, thereby improve the purpose of the degree of supercooling of primary flow path, auxiliary branch carries out directly getting back to compressor low-pressure side (suction side) after the heat exchange.Then need increase the check valve assembly device for heat pump type air conditioning system, for single cold air-conditioning unit, this check valve apparatus can be cancelled.
Aircondition of the present invention; During refrigeration: the warm gases at high pressure that compressor is discharged get into oil eliminator; The oil that oil eliminator will separate returns suction side, and separated refrigerant gets into the cross valve switching-over, flows to the off-premises station heat exchanger after the switching-over and cools off; The liquid refrigerants of the cryogenic high pressure of cooling flows to the high pressure fluid reservoir through second check valve 62; The high-pressure liquid refrigerant that fluid reservoir comes out is through improving the degree of supercooling device, and the refrigerant of the low-temp low-pressure after a part of auxiliary branch throttling and the refrigerant of main branch road carry out heat exchange, improves the degree of supercooling of primary flow path; Auxiliary branch gets into gas-liquid separator through becoming refrigerant vapour after the heat exchange, finally gets back to suction side; Further cooling behind the cryogenic high pressure refrigerant process degree of supercooling device of primary flow path; The degree of supercooling increase also flows to the throttling arrangement throttling; The saturated liquid refrigerants that dams into low temperature, low pressure flows to the indoor set heat exchanger through the 3rd check valve 63 and evaporates; Low-temperature low-pressure refrigerant steam after evaporating is got back to behind the gas-liquid separator and auxiliary branch bout, the suction side that finally gets into compressor through cross valve.
When heating: the high temperature and high pressure gas that compressor is discharged gets into oil eliminator; The oil that oil eliminator will separate returns suction side; Separated refrigerant gets into the cross valve switching-over, flows to the indoor set heat exchanger after the switching-over and cools off heat release, and the liquid refrigerants of the cryogenic high pressure of cooling flows to high pressure fluid reservoir 70 through the 4th check valve 64; The high-pressure liquid refrigerant that high pressure fluid reservoir 70 comes out is through the degree of supercooling device; The refrigerant of the low-temp low-pressure after the throttling of part auxiliary branch and the refrigerant of main branch road carry out heat exchange, improve the degree of supercooling of primary flow path, and auxiliary branch mixes with primary flow path through becoming refrigerant vapour entering gas-liquid separator after the heat exchange; And can improve the degree of superheat of primary flow path, finally get back to suction side; Further cooling behind the cryogenic high pressure refrigerant process degree of supercooling device of primary flow path; Flow to the throttling arrangement throttling again after increasing degree of supercooling; The saturated liquid refrigerants of the low temperature after the throttling, low pressure flows to the off-premises station heat exchanger through check valve 61 and evaporates, and the low-temperature low-pressure refrigerant steam after evaporating is got back to behind the gas-liquid separator and the suction side that helps branch road to converge to flow to compressor through cross valve.
Install improving the degree of supercooling device for source pump must points for attention:
Can increase as shown in Figure 6 check valve apparatus or similarly non-return device can control degree of supercooling/degree of superheat when cooling and warming to guarantee the import and export invariant position of refrigerant at the degree of supercooling device.
Improve check valve of parallel connection on the degree of supercooling device at this, can improve degree of supercooling in the time of refrigeration, from the check valve process, can only under the situation of refrigeration, control degree of supercooling/degree of superheat like this when heating.
The electric expansion valve that will improve when heating on the supercooling apparatus closes extremely, and it is inoperative to improve the degree of supercooling device when heating, and just opens electronic expansion valve controls degree of supercooling/degree of superheat during refrigeration.
Under the situation that does not have wherein one or more auxiliary elements such as oil eliminator, gas-liquid separator, high pressure fluid reservoir in the air-conditioning system, also can use this degree of supercooling device.
Air-conditioning for there not being wherein one or more auxiliary elements such as oil eliminator, gas-liquid separator, high pressure fluid reservoir in the system also can use this degree of supercooling device.
Above-mentioned listed concrete implementation is nonrestrictive, to one skilled in the art, is not departing from the scope of the invention, and various improvement and the variation carried out all belong to protection scope of the present invention.For example, concrete form of heat exchange mechanisms 12 etc.
Claims (9)
1. an energy-saving air-conditioning device includes control system, air-conditioner outdoor unit, indoor apparatus of air conditioner and is connected in many refrigerant pipes between said air-conditioner outdoor unit, the indoor set; Refrigerant circulates in said refrigerant pipe; Said air-conditioner outdoor unit includes compressor, off-premises station heat exchanger and throttling arrangement, and said compressor, off-premises station heat exchanger and throttling arrangement all connect through many refrigerant pipes; Said indoor apparatus of air conditioner includes the indoor set heat exchanger; It is characterized in that: said air-conditioner outdoor unit is provided with and improves degree of supercooling device (10), and said raising degree of supercooling device includes throttle mechanism (11) and heat exchange mechanisms (12); Said raising degree of supercooling device is connected with wherein refrigerant pipe of said air-conditioner outdoor unit, and the refrigerant pipe that said connection improves the degree of supercooling device is branched off into: auxiliary branch (13) and primary flow path (20); Said throttle mechanism (11) is a kind of electric expansion valve or capillary and is arranged on the auxiliary branch (13); Said heat exchange mechanisms (12) is the parallel welded type heat exchanger of a kind of double pipe heat exchanger or a kind of copper pipe; The initiating terminal of said auxiliary branch (13) links to each other with the port of export of outdoor heat exchanger; Being connected with compressor inlet by end of said auxiliary branch, said primary flow path initiating terminal links to each other with the port of export of outdoor heat exchanger, and the end that ends of said primary flow path links to each other with throttling arrangement (80).
2. a kind of energy-saving air-conditioning device according to claim 1; It is characterized in that: said heat exchange mechanisms (12) adopts the double-tube heat exchanger structure; Primary flow path (20) is passed the middle part of said heat exchange mechanisms (12); Auxiliary branch (13) is communicated with sleeve pipe (121), and sleeve pipe (121) is nested in primary flow path (20) outside; The appearance of sleeve pipe (121) is incubated with the heat-preservation cotton parcel.
3. a kind of energy-saving air-conditioning device according to claim 1; It is characterized in that: said heat exchange mechanisms (12) adopts the parallel welded type heat exchanger structure of copper pipe; Primary flow path (20) is two parallel copper pipes with auxiliary branch (13), and the side-walls (15) of said primary flow path (20) and auxiliary branch (13) adopts the mode of welding to be connected; The appearance of said primary flow path (20) and auxiliary branch (13) is incubated with the heat-preservation cotton parcel.
4. a kind of energy-saving air-conditioning device according to claim 1 is characterized in that: the low-pressure side of said air-conditioning pump (30) is provided with gas-liquid separator (32), and the high-pressure side of compressor (30) is provided with oil eliminator (31); Indoor set heat exchanger (100) is connected with said gas-liquid separator (32), and off-premises station heat exchanger (50) is connected with said oil eliminator (31).
5. a kind of energy-saving air-conditioning device according to claim 1 is characterized in that: connect through stop valve (91,92) between said air-conditioner outdoor unit, the indoor apparatus of air conditioner.
6. a kind of energy-saving air-conditioning device according to claim 4 is characterized in that: the port of export of said off-premises station heat exchanger (50), connect a high pressure fluid reservoir (70), and said off-premises station heat exchanger (50) connects the inlet of high pressure fluid reservoir (70); Improving degree of supercooling device (10) is connected with the outlet of said high pressure fluid reservoir (70).
7. a kind of energy-saving air-conditioning device according to claim 5 is characterized in that: after said auxiliary branch (13) the process heat exchange mechanisms (12), connect gas-liquid separator (32); After primary flow path (20) the process heat exchange mechanisms (12), be connected with throttling arrangement (80).
8. a kind of energy-saving air-conditioning device according to claim 7; It is characterized in that: said aircondition is provided with a cross valve (40), and 4 interfaces of said cross valve (40) connect respectively: indoor set heat exchanger (100), gas-liquid separator (32), oil eliminator (31) and off-premises station heat exchanger (50).
9. a kind of energy-saving air-conditioning device according to claim 8; It is characterized in that: said aircondition is provided with check valve apparatus (60); Said check valve apparatus (60) includes two groups of check valve assemblies that are connected in parallel, that is: check valve assembly one and check valve assembly two; Said check valve assembly one includes first check valve (61) and the 3rd check valve (63) of reverse setting, and said check valve assembly two includes second check valve (62) and the 4th check valve (64) of reverse setting; The inlet of high pressure fluid reservoir (70) and primary flow path (20) connect the centre position of said check valve assembly one and check valve assembly two respectively.
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| CN2009100366036A CN101776308B (en) | 2009-01-13 | 2009-01-13 | Energy-saving air conditioner |
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|---|---|---|---|
| CN2009100366036A CN101776308B (en) | 2009-01-13 | 2009-01-13 | Energy-saving air conditioner |
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| CN101776308A CN101776308A (en) | 2010-07-14 |
| CN101776308B true CN101776308B (en) | 2012-11-21 |
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| JP5409544B2 (en) * | 2010-08-04 | 2014-02-05 | 三菱電機株式会社 | Air conditioner indoor unit and air conditioner |
| CN101915450B (en) * | 2010-08-16 | 2012-10-10 | 清华大学 | Multi-online indoor machine wind side bypass capacity control method and device thereof |
| CN103175323B (en) * | 2011-12-23 | 2017-03-01 | 东普雷股份有限公司 | Refrigerating plant using ternary pipe-type heat exchanger |
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| CN104848579B (en) * | 2015-05-05 | 2017-12-01 | 广东美的制冷设备有限公司 | Air conditioner and its heat-exchange system |
| CN104832993A (en) * | 2015-05-13 | 2015-08-12 | 苏州奥然日用品有限公司 | Energy-saving air conditioner |
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| CN108375255B (en) * | 2017-12-29 | 2019-12-06 | 青岛海尔空调器有限总公司 | Air conditioner system |
| CN108890069A (en) * | 2018-08-22 | 2018-11-27 | 长沙格力暖通制冷设备有限公司 | Welding tool for air conditioner multi-split air conditioner and production line thereof |
| CN109237639A (en) * | 2018-10-25 | 2019-01-18 | 奥克斯空调股份有限公司 | A kind of auxiliary heat exchanging device and air conditioner |
| CN109878292A (en) * | 2019-04-02 | 2019-06-14 | 濮阳市飞翔汽车科技有限公司 | Caravan and its air-conditioning |
| CN110595116A (en) * | 2019-09-24 | 2019-12-20 | 青岛澳柯玛超低温冷冻设备有限公司 | Single-machine secondary throttling regenerative refrigeration cycle system |
| CN114688702B (en) * | 2022-04-27 | 2023-08-04 | 美的集团武汉暖通设备有限公司 | Air conditioner control method and device and air conditioner |
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