CN205261989U - Heat pump air conditioner heat exchanger of variable flow path - Google Patents
Heat pump air conditioner heat exchanger of variable flow path Download PDFInfo
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- CN205261989U CN205261989U CN201521108163.8U CN201521108163U CN205261989U CN 205261989 U CN205261989 U CN 205261989U CN 201521108163 U CN201521108163 U CN 201521108163U CN 205261989 U CN205261989 U CN 205261989U
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Abstract
The utility model provides a heat pump air conditioner heat exchanger of variable flow path, its include gas collection mouth (1), ji yekou (2) and set up in gas collection mouth (1) and three heat exchange flow path between ji yekou (2), three heat exchange flow path is parallelly connected the setting each other, the heat exchanger is still including control at least one flow path switch -on or the control valve system of disconnection in order can realize switching each other between different flow paths among the three heat exchange flow path. Through the utility model discloses a heat pump air conditioner heat exchanger of variable flow path can effectively realize the switching of heat exchanger flow path under the different operational aspect of unit to increase heat exchange coefficient, and then promote the heat transfer effect.
Description
Technical field
The utility model belongs to air-conditioning technical field, is specifically related to a kind of heat pump air conditioner heat exchange of variable streamDevice.
Background technology
For existing heat pump air conditioner heat exchanger, freezing, heat, different various operations of running frequencyUnder state, the stream of heat exchanger is all identical, and large quantity research shows refrigeration, heats and different frequenciesThe best stream of lower indoor and outdoor heat exchanger is not identical. When heat exchanger, its pressure loss is during as condenserLittle, at this moment we need to adopt a less point way to improve the refrigerant flow rate increase coefficient of heat transfer; Work as heat exchangerDuring as evaporimeter, unit in the time that medium-high frequency is moved compared with the impact of flow velocity heat transfer coefficient, the pressure lossThe impact that the logarithmic mean temperature difference (LMTD) producing reduces to exchange heat accounts for leading factor, and at this moment we need to adopt moreA point way improve heat exchange amount; In the time of low-frequency operation, the logarithmic mean temperature difference (LMTD) producing with the pressure loss reducesExchange heat effects is compared, and the impact of flow velocity heat transfer coefficient accounts for leading factor, and at this moment we need to adoptFew stream number improves refrigerant flow rate to increase the coefficient of heat transfer. Thus for same heat exchanger with regard to nothingMethod accomplishes to change heat exchanger flow circuit according to the difference of practical operation situation.
Because existing, air-condition heat exchanger of the prior art cannot change according to the difference of practical operation situationHeat exchanger flow circuit and increase the technical problem of the coefficient of heat transfer, therefore the utility model research and design goes out a kind of variableThe heat pump air conditioner heat exchanger of stream.
Utility model content
Therefore, the technical problems to be solved in the utility model is to overcome air-condition heat exchanger of the prior art and depositsIn the defect that cannot change heat exchanger flow circuit and increase according to the difference of practical operation situation the coefficient of heat transfer, fromAnd provide a kind of heat pump air conditioner heat exchanger of variable stream.
The utility model provides a kind of heat pump air conditioner heat exchanger of variable stream, and it comprises gas collection mouth, liquid collection openingAnd be arranged at three heat exchange streams between described gas collection mouth and described liquid collection opening, described three heat exchange streams thatBetween this, be arranged in parallel, described heat exchanger also comprises at least one stream of controlling in described three heat exchange streamsBe switched on or switched off the control valve system of mutually switching realizing between different streams.
Preferably, described three heat exchange streams are respectively the first stream, the second stream and the 3rd stream, described inControl valve system comprises the magnetic valve being arranged on described the 3rd stream.
Preferably, described magnetic valve is arranged on described the 3rd stream near described gas collection mouth one end.
Preferably, described heat exchanger also comprises from the line branching between described magnetic valve and the 3rd stream outBypass line, the other end of this bypass line is connected to described liquid collection opening end.
Preferably, described control valve system also comprises the triple valve that is arranged on liquid collection opening end, described triple valveThree links are connected to respectively merging end in parallel and the described bypass of liquid collection opening end, described three heat exchange streamsPipeline.
Preferably, the heat exchange area of described three heat exchange streams is identical.
Preferably, described heat exchanger is Split wall-mounted heat pump air conditioner heat exchanger.
Preferably, described heat exchanger is indoor set heat exchanger or outdoor heat exchanger.
The heat pump air conditioner heat transfer equipment of the variable stream that the utility model provides has following beneficial effect:
1. by the heat pump air conditioner heat exchanger of variable stream of the present utility model, can effectively realize unit notThe switching of heat exchanger flow circuit under same ruuning situation, thus increase the coefficient of heat transfer and then promote heat transfer effect;
2. when heat exchanger is during as condenser, can improve cold by the structure that switches to two heat exchange streamsMatchmaker's flow velocity, the increase coefficient of heat transfer, and then promote heat transfer effect, can increase by the use of supercooling tube simultaneouslyThe degree of supercooling of refrigerant before throttling, reduces restriction loss, improves specific refrigerating effect;
3. when heat exchanger is as evaporimeter and in the time that compressor medium-high frequency is moved, by switching to three heat exchange streamsThe structure on road can effectively reduce cold-producing medium flow velocity, reduces the pressure loss, thereby increases the coefficient of heat transfer, and thenPromote heat transfer effect;
4. when heat exchanger is during as evaporimeter and when compressor low-frequency operation, by switching to two heat exchange streamsThereby the structure on road can effectively improve cold-producing medium flow velocity and increase the coefficient of heat transfer, and then promote heat transfer effect.
Brief description of the drawings
Fig. 1 is the structural representation of the heat pump air conditioner heat exchanger of variable stream of the present utility model;
Fig. 2 is that the heat pump air conditioner heat exchanger of variable stream of the present utility model is the heat exchange of Split wall-mounted indoor setThe structural representation of device;
Fig. 3 is that the heat pump air conditioner heat exchanger of variable stream of the present utility model is the heat exchange of Split wall-mounted off-premises stationThe structural representation of device.
In figure, Reference numeral is expressed as:
1-gas collection mouth, 2-liquid collection opening, the 3-the first heat exchange stream, the 4-the second heat exchange stream, 5-The 3rd heat exchange stream, 6-magnetic valve, 7-triple valve, the first end of the 101-the first heat exchange stream, 102The first end of the-the second heat exchange stream, the first end of the 103-the three heat exchange stream, the 104-the first heat exchange streamSecond end on road, the second end of the 105-the second heat exchange stream, the second end of the 106-the three heat exchange stream,107-bypass line.
Detailed description of the invention
As shown in Figure 1, the utility model provides a kind of heat pump air conditioner heat exchanger of variable stream, and it comprises collectionGas port 1, liquid collection opening 2 and be arranged at three heat exchange streams between described gas collection mouth 1 and described liquid collection opening 2,Described three heat exchange streams are arranged in parallel each other, and described heat exchanger also comprises controls described three heat exchange streamAt least one stream in road is switched on or switched off the control of mutually switching between different streams realizingValve system.
By the heat pump air conditioner heat exchanger of variable stream of the present utility model, unit can effectively be realized differentThe switching of heat exchanger flow circuit under ruuning situation, thus the coefficient of heat transfer increased, and then promote heat transfer effect; When changingHot device during as condenser, can improve refrigerant flow rate, increase by the structure that switches to two heat exchange streamsThe coefficient of heat transfer, and then promote heat transfer effect can increase refrigerant before throttling by the use of supercooling tube simultaneouslyDegree of supercooling, reduces restriction loss, improves specific refrigerating effect; When heat exchanger is as evaporimeter and when in compressorWhen high frequency operation, can effectively reduce cold-producing medium flow velocity by the structure that switches to three heat exchange streams, reduceThe pressure loss, thus the coefficient of heat transfer increased, and then promote heat transfer effect; When heat exchanger as evaporimeter and work asWhen compressor low-frequency operation, can effectively improve cold-producing medium stream by switching to the structure of two heat exchange streamsThereby speed increases the coefficient of heat transfer, and then promote heat transfer effect. Here need to explain: generally neckUnder the common state in territory, low frequency refers to that frequency is between 0-250hz; Intermediate frequency refers to that frequency is between 250-1khz; HighFrequently refer to that frequency is between 1khz-3khz.
Preferably, described three heat exchange streams are respectively the first stream 3, the second stream 4 and the 3rd stream 5,Described control valve system comprises the magnetic valve 6 being arranged on described the 3rd stream 5. By by control valve systemComprise the magnetic valve being arranged on described the 3rd stream can effectively control the 3rd heat exchange stream connection orDisconnect, play the effect of Based Intelligent Control.
Preferably, described magnetic valve 6 is arranged on described the 3rd stream 5 near described gas collection mouth 1 one end.Can be to hold the system of the 3rd stream from gas collection mouth near gas collection mouth one end by described magnetic valve is arranged onCryogen or the 3rd stream play to the stream of the cold-producing medium of gas collection mouth end the effect opening or closing.
Preferably, described heat exchanger also comprises from the line branching between described magnetic valve 6 and the 3rd stream 5Bypass line 107 out, the other end of this bypass line 107 is connected to described liquid collection opening 2 ends. Pass throughThe bypass line that above-mentioned annexation is set can effectively make can be via during as condenser at heat exchangerThe 3rd heat exchange stream and bypass line carry out super cooling effect, thereby have improved the degree of supercooling of the front cold-producing medium of throttling,Reduce restriction loss, improved specific refrigerating effect; And can make heat exchanger low as evaporimeterWhile frequently work, cold-producing medium is carried out in the 3rd heat exchange stream in advance via bypass line and the 3rd heat exchange streamThe effect of evaporation endothermic, has reduced heat exchange stream number, has improved overall heat exchange amount.
Preferably, described control valve system also comprises the triple valve 7 that is arranged on liquid collection opening 2 ends, described threewayThree links of valve 7 be connected to respectively liquid collection opening 2 ends, described three heat exchange streams merging end in parallel,And described bypass line 107. Can intelligence and control effectively by the triple valve that is arranged on above-mentioned positionLiquid collection opening end processed is at least one the on-off in three heat exchange streams of parallel connection, thereby according to actual conditionsBreak-make or the switching that need to carry out heat exchange stream, and to control liquid collection opening end be the heat exchange stream in parallel with threeBe connected, or be connected with bypass line, thereby three tunnel heat exchange or two-way are carried out in control according to actual conditionsHeat exchange, and then promote heat exchange amount, and then improve the heat transfer effect of heat exchanger.
Preferably, the heat exchange area of described three heat exchange streams is identical, such structure choice and design be forGuarantee cold-producing medium on three heat exchange streams, can distribute uniformly, ensure in other words conj.or perhaps that refrigerant distributes allEven property.
As Figure 2-3, preferably, described heat exchanger is Split wall-mounted heat pump air conditioner heat exchanger. This isA kind of structure of preferred heat exchanger and form.
As Figure 2-3, preferably, described heat exchanger is indoor set heat exchanger or outdoor heat exchanger. This isA kind of advantageous applications mode and range of application of heat exchanger. Specifically preferably, as shown in Figure 2, described heat exchangeDevice is Split wall-mounted indoor set heat exchanger; As shown in Figure 3, described heat exchanger is Split wall-mounted off-premises stationHeat exchanger.
Preferred embodiment of the present utility model provides a kind of heat pump air conditioner heat exchanger, by increasing by 1 electricity1 triple valve of magnet valve and corresponding connecting line, realize heat exchanger flow circuit under the different ruuning situation of unitSwitch. Wherein two streams add supercooling tube and are applicable to condensation process, when three streams are applicable to the operation of unit medium-high frequencyEvaporation process, evaporation process when two streams are applicable to unit low-frequency operation. What the utility model provided changesEvaporimeter when hot device can better be taken into account heat pump air conditioner heat exchanger respectively as condenser, medium-high frequency operationThe optimization of the heat exchange efficiency of the evaporimeter during with low-frequency operation, thus the comprehensive of heat pump type air conditioning system improvedCan, and input cost is low, is easy to realize.
The magnetic valve that heat exchanger of the present utility model has and triple valve can be with realizing arbitrarily identical workWith miscellaneous part replace.
The utility model also provides a kind of control method of heat pump air conditioner heat exchanger of variable stream, and it is for frontThe heat pump air conditioner heat exchanger of stating, controls to adjust it according to actual conditions.
The control method of the heat pump air conditioner heat exchanger by variable stream of the present utility model, can effectively realizeThe switching of heat exchanger flow circuit under the different ruuning situation of unit, thus the coefficient of heat transfer increased, and then promote heat exchangeEffect; When heat exchanger is during as condenser, can improve refrigerant by the structure that switches to two heat exchange streamsFlow velocity, the increase coefficient of heat transfer, and then promote heat transfer effect, can increase joint by the use of supercooling tube simultaneouslyThe degree of supercooling of refrigerant before stream, reduces restriction loss, improves specific refrigerating effect; When heat exchanger as evaporimeter andIn the time that compressor medium-high frequency is moved, can effectively reduce cold-producing medium by the structure that switches to three heat exchange streamsFlow velocity, reduces the pressure loss, thereby increases the coefficient of heat transfer, and then promotes heat transfer effect; When heat exchanger conductEvaporimeter and in the time of compressor low-frequency operation, can effectively improve by the structure that switches to two heat exchange streamsThereby cold-producing medium flow velocity increases the coefficient of heat transfer, and then promote heat transfer effect.
Preferably, when heat exchanger is during as condenser, adjusting control valve system is connected two-way heat exchange stream,Remain that a road heat exchange stream is disconnected or as subcooler. Because condensation process has adopted less point way,The flow velocity of refrigerant improves, intraductal heat exchange coefficient increases; At condenser ends, supercooling tube being set can increase simultaneouslyThe degree of supercooling of refrigerant before throttling, reduces restriction loss, improves specific refrigerating effect.
Preferably, in the time that control valve system comprises aforesaid magnetic valve and triple valve, shut electromagnetic valve, regulatesTriple valve makes that liquid collection opening end and bypass line termination are logical, three heat exchange streams are near the remittance in parallel of liquid collection opening endClosing end disconnects with liquid collection opening end. Make like this first and second heat exchange stream conductings carry out two-way heat exchange, energyThereby enough coefficients of heat transfer that effectively increases improve heat exchange amount, and the 3rd heat exchange stream carried out cold cooling, Neng GouzengAdd the degree of supercooling of the front refrigerant of throttling, reduce restriction loss, improve specific refrigerating effect.
Particularly as Figure 1-3, regulating three-way valve A-C conducting, the supersaturation gaseous state refrigerant of HTHPEnter heat exchanger by gas collection mouth, enter respectively the 1st and the 2nd stream, condensation via tube connector 101 and 102For gas-liquid two-phase refrigerant, then converge to tube connector 106 by tube connector 104 and 105 respectively, then flow through3 streams (supercooling tube), continue to be cooled to the liquid refrigerants with certain degree of supercooling, then via tube connector 103,107 and triple valve C-A, from liquid collection opening outflow heat exchanger.
Preferably, when heat exchanger as evaporimeter and compressor operating medium-high frequency situation under, adjusting control valve systemSystem is all connected three tunnel heat exchange streams. Because evaporation process has adopted more point way, the flow velocity of refrigerantReduction, the pressure loss reduce, and overall heat exchange amount also can improve.
Preferably, in the time that control valve system comprises aforesaid magnetic valve and triple valve, now open magnetic valve,Regulating three-way valve makes three heat exchange streams near the merging end in parallel of liquid collection opening end and liquid collection opening termination is logical, collectionLiquid mouth end and bypass pipe terminal are disconnected. Make like this conducting simultaneously of first, second, and third heat exchange stream enterThe heat exchange of Hang San road, can effectively reduce the pressure loss, improves heat exchange amount thereby increase the coefficient of heat transfer.
Specifically preferably, triple valve A-B conducting, the gas-liquid two-phase refrigerant of the low-temp low-pressure after throttling is by liquid collectingMouthful enter heat exchanger, flow through after triple valve A-B, enter the via tube connector 104,105 and 106 respectively1, the 2nd and the 3rd stream, is evaporated to saturated or has the gaseous coolant of certain degree of superheat, from the 3rd streamRoad gaseous coolant out flow through tube connector 103 and magnetic valve, cold from the 1st and the 2nd stream gaseous state outMatchmaker's tube connector 101 and 102 of flowing through, after gathering from gas collection mouth outflow heat exchanger.
Preferably, when heat exchanger as evaporimeter and compressor operating low frequency situation under, adjusting control valve systemTwo-way heat exchange stream in three tunnel heat exchange streams is connected, and residue one tunnel heat exchange stream is disconnected or is used as pre-Evaporimeter effect. During due to evaporation process compressor low-frequency operation, the flow velocity of refrigerant is very little, and therefore pressure damagesLose also very littlely, now adopted less point way, improve the flow velocity of refrigerant, overall heat exchange amount also can improve.
Preferably, in the time that control valve system comprises aforesaid magnetic valve and triple valve, now shut electromagnetic valve,Regulating three-way valve makes that liquid collection opening end and bypass line termination are logical, three heat exchange streams near liquid collection opening end alsoConnection merging end and liquid collection opening end are disconnected. Make like this conducting simultaneously of first, second heat exchange stream carry out two-wayHeat exchange, the 3rd heat exchange stream carries out and evaporation, can effectively reduce the pressure loss, increases the coefficient of heat transferThereby improve heat exchange amount.
Specifically preferably, triple valve A-C conducting, the gas-liquid two-phase refrigerant of the low-temp low-pressure after throttling is by liquid collectingMouth enters heat exchanger, flows through after triple valve A-C, enters the 3rd stream, warp via tube connector 107,103Cross after the evaporation of first stage, tube connector 106, be divided into two-way from the 3rd stream refrigerant out, respectivelyEnter the 1st and the 2nd stream from tube connector 104 and 105 and carry out the evaporation of first stage, from the 1st and the 2ndThe stream gaseous coolant out tube connector 101 and 102 of flowing through, after gathering from gas collection mouth outflow heat exchanger.
Introduce preferred embodiment of the present utility model and control method below
As Figure 1-3, heat exchanger of the present utility model is by 3 heat exchange streams, 1 magnetic valve, 1Triple valve and corresponding connecting line composition, its specific works flow process is as follows:
1, heat exchanger is as condenser, and stream is that two streams add supercooling tube
As condensation process, now closed electromagnetic valve, triple valve A-C conducting, the supersaturated vapor of HTHPState refrigerant enters heat exchanger by gas collection mouth, enters respectively the 1st and the 2nd stream via tube connector 101 and 102,Be condensed into gas-liquid two-phase refrigerant, then converge to tube connector 106 by tube connector 104 and 105 respectively, then streamThrough the 3rd stream (supercooling tube), continue to be cooled to the liquid refrigerants with certain degree of supercooling, then via connectionPipe 103,107 and triple valve C-A, from liquid collection opening outflow heat exchanger.
Because condensation process has adopted less point way, the flow velocity of refrigerant improves, intraductal heat exchange coefficient increases;The degree of supercooling of refrigerant before condenser ends arranges supercooling tube can increase throttling simultaneously, minimizing restriction loss,Improve specific refrigerating effect.
2, heat exchanger is as in evaporimeter and compressor operating medium-high frequency situation, and stream is three streams
As evaporation process, now magnetic valve is opened, triple valve A-B conducting, the low-temp low-pressure after throttlingGas-liquid two-phase refrigerant enters heat exchanger by liquid collection opening, flow through after triple valve A-B, respectively via tube connector 104,105 and 106 enter the 1st, the 2nd and the 3rd stream, are evaporated to saturated or have the gas of certain degree of superheatState refrigerant, from the 3rd stream gaseous coolant out flow through tube connector 103 and magnetic valve, from the 1st and the 2ndThe stream gaseous coolant out tube connector 101 and 102 of flowing through, after gathering from gas collection mouth outflow heat exchanger.
Because evaporation process has adopted more point way, the flow velocity of refrigerant reduces, the pressure loss reduces, wholeBody heat exchange amount also can improve.
3, heat exchanger is as in evaporimeter and compressor operating low frequency situation, and stream is two streams
As evaporation process, now closed electromagnetic valve, triple valve A-C conducting, the low-temp low-pressure after throttlingGas-liquid two-phase refrigerant enters heat exchanger by liquid collection opening, flows through after triple valve A-C, via tube connector 107,103Enter the 3rd stream, after the evaporation of first stage, from the 3rd stream refrigerant out at tube connector 106In be divided into two-way, enter the 1st and the 2nd stream from tube connector 104 and 105 respectively and carry out the steaming of first stageSend out, from the 1st and the 2nd stream gaseous coolant out tube connector 101 and 102 of flowing through, after gathering from gas collectionMouth outflow heat exchanger.
During due to evaporation process compressor low-frequency operation, the flow velocity of refrigerant is very little, and therefore the pressure loss is also very little,Now adopted less point way, improved the flow velocity of refrigerant, overall heat exchange amount also can improve.
3 heat exchange streams that heat exchanger of the present utility model has, its heat exchange area should be consistent, to protectThe uniformity that card refrigerant distributes.
Detailed description of the invention of the present utility model can be indoor heat exchanger or the chamber of heat pump air conditionerOutside heat exchanger, is respectively the utility model indoor as Split wall-mounted heat pump air conditioner shown in Fig. 2 and Fig. 3The application example of machine heat exchanger and outdoor unit heat exchanger.
Those skilled in the art will readily understand, under the prerequisite of not conflicting, above-mentioned each advantageous manner canFreely to combine, to superpose.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model,All any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., all shouldWithin being included in protection domain of the present utility model. The above is only preferred enforcement side of the present utility modelFormula, it should be pointed out that for those skilled in the art, is not departing from the utility model skillUnder the prerequisite of art principle, can also make some improvement and modification, these improve and modification also should be considered as this realityWith novel protection domain.
Claims (8)
1. a heat pump air conditioner heat exchanger for variable stream, is characterized in that: comprise gas collection mouth (1), collectionLiquid mouth (2) and be arranged at described gas collection mouth (1) and described liquid collection opening (2) between three heat exchange streams,Described three heat exchange streams are arranged in parallel each other, and described heat exchanger also comprises controls described three heat exchange streamAt least one stream in road is switched on or switched off the control of mutually switching between different streams realizingValve system.
2. the heat pump air conditioner heat exchanger of variable stream according to claim 1, is characterized in that: described inThree heat exchange streams are respectively the first stream (3), the second stream (4) and the 3rd stream (5), described inControl valve system comprises the magnetic valve (6) being arranged on described the 3rd stream (5).
3. the heat pump air conditioner heat exchanger of variable stream according to claim 2, is characterized in that: instituteStating magnetic valve (6) is arranged on described the 3rd stream (5) near described gas collection mouth (1) one end.
4. the heat pump air conditioner heat exchanger of variable stream according to claim 3, is characterized in that: instituteStating heat exchanger also comprises from the side out of the line branching between described magnetic valve (6) and the 3rd stream (5)Siphunculus road (107), the other end of this bypass line is connected to described liquid collection opening (2) end.
5. the heat pump air conditioner heat exchanger of variable stream according to claim 4, is characterized in that: instituteState control valve system and also comprise the triple valve (7) that is arranged on liquid collection opening (2) end, described triple valve (7)Three links be connected to respectively merging end in parallel and the institute of liquid collection opening (2), described three heat exchange streamsState bypass line (107).
6. according to the heat pump air conditioner heat exchanger of the variable stream one of claim 1-5 Suo Shu, its feature existsIn: the heat exchange area of described three heat exchange streams is identical.
7. according to the heat pump air conditioner heat exchanger of the variable stream one of claim 1-5 Suo Shu, its feature existsIn: described heat exchanger is Split wall-mounted heat pump air conditioner heat exchanger.
8. according to the heat pump air conditioner heat exchanger of the variable stream one of claim 1-5 Suo Shu, its feature existsIn: described heat exchanger is indoor set heat exchanger or outdoor heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521108163.8U CN205261989U (en) | 2015-12-24 | 2015-12-24 | Heat pump air conditioner heat exchanger of variable flow path |
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| CN201521108163.8U CN205261989U (en) | 2015-12-24 | 2015-12-24 | Heat pump air conditioner heat exchanger of variable flow path |
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| CN205261989U true CN205261989U (en) | 2016-05-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466083A (en) * | 2015-12-24 | 2016-04-06 | 珠海格力电器股份有限公司 | Flow-way-changeable heat pump air conditioner heat exchanger and control method thereof |
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- 2015-12-24 CN CN201521108163.8U patent/CN205261989U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105466083A (en) * | 2015-12-24 | 2016-04-06 | 珠海格力电器股份有限公司 | Flow-way-changeable heat pump air conditioner heat exchanger and control method thereof |
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