CN102997519B - For selecting testing arrangement, the system and method for capillary specification - Google Patents
For selecting testing arrangement, the system and method for capillary specification Download PDFInfo
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- CN102997519B CN102997519B CN201210527919.7A CN201210527919A CN102997519B CN 102997519 B CN102997519 B CN 102997519B CN 201210527919 A CN201210527919 A CN 201210527919A CN 102997519 B CN102997519 B CN 102997519B
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Abstract
The invention provides a kind of for selecting testing arrangement, the system and method for capillary specification, this testing arrangement comprises the first copper pipe, the second copper pipe and can show the flow control valve of its spool opening degree, the entrance of flow control valve is connected with the outlet of the first copper pipe, and the outlet of flow control valve is connected with the entrance of the second copper pipe. First by the spool opening degree of adjust flux control valve, make the system performance index of the equipment being connected with testing arrangement of the present invention reach preset value, then according to the corresponding relation between the flow of the fluid of the spool opening degree of flow control valve and this flow control valve of flowing through, and corresponding relation between fluid flow and capillary specification, select the target capillary of appropriate size. The present invention has not only simplified the operation that capillary is selected, and has also avoided the stability of the system of the equipment that affects, and has stopped the leakage of fluid, and meanwhile, the selection of capillary specification, without the experience that relies on operating personnel, has precisely advantage fast.<!--1-->
Description
Technical field
The present invention relates to air conditioner debugging technical field, specially refer to a kind of for selecting capillary ruleThe testing arrangement of lattice, system and method.
Background technology
It is that Performance for Air Conditioning Systems index is reached that air-conditioning system has suitable freon flow in the time of workBest key factor. In order to make Performance for Air Conditioning Systems index reach best, at debugging air-conditionerWhen performance, the technological means conventionally adopting is to change the capillary of different size (length and internal diameter)Pipe, until find the capillary of suitable specification, so that air-conditioning system has in the time of work is suitableFreon flow.
In prior art, change the following deficiency of technical scheme existence capillaceous of different size by employing：
1, change complex operation capillaceous, and need to rely on operating personnel's experience to change appropriate sizeCapillary;
2, frequently change the stability that can change air-conditioning refrigeration system in process capillaceous, also may makeBecome the leakage accident of freon;
3, cannot select the capillary that specification is the most suitable, make system performance index cannot reach best。
Summary of the invention
Main purpose of the present invention has been to provide a kind of for selecting the testing arrangement of capillary specification, purportIn the operation of simplifying capillary selection, realize the target order capillaceous of selecting fast optimum specifications.
The embodiment of the invention discloses a kind ofly for selecting the testing arrangement of capillary specification, comprise firstCopper pipe, the second copper pipe and can show the flow control valve of its spool opening degree, described flow controlThe entrance of valve processed is connected with the outlet of described the first copper pipe, the outlet of described flow control valve and instituteThe entrance of stating the second copper pipe connects.
Preferably, this testing arrangement also comprises:
Acquisition module, for gathering the spool opening degree of described flow control valve;
With the first computing module, for according to the spool opening degree of described flow control valve and preset'sThe internal diameter of described the first copper pipe, internal diameter and the fluid type of described the second copper pipe, calculate and flow throughThe first-class value of target fluid capillaceous.
Preferably, this testing arrangement also comprises:
The first Pressure gauge, is communicated with to record the pressure of fluid in described the first copper pipe with described the first copper pipeValue;
The second Pressure gauge, is communicated with to record the pressure of fluid in described the second copper pipe with described the second copper pipeValue.
Preferably, described acquisition module is also for gathering described the first manometric force value and describedTwo manometric force value; This testing arrangement also comprises:
The second computing module, for according to described the first manometric force value, described the second Pressure gaugeForce value and the internal diameter of the internal diameter of preset described the first copper pipe, described the second copper pipe andFluid type, calculates the second value of the target fluid capillaceous of flowing through;
And judge module, whether equate with described second value for contrasting described first-class value,And export judged result.
Preferably, this testing arrangement also comprises:
The first Pressure gauge, is communicated with to record the pressure of fluid in described the first copper pipe with described the first copper pipeValue;
The second Pressure gauge, is communicated with to record the pressure of fluid in described the second copper pipe with described the second copper pipeValue.
Preferably, the internal diameter of the internal diameter of described the first copper pipe and described the second copper pipe equates.
The embodiment of the invention also discloses a kind of test macro of selecting air-conditioner capillary specification, bagDraw together and be connected between the two-way stop valve of air-conditioner outdoor unit and air-conditioning indoor and outdoor machine liquid pipe connected pipeFor selecting the testing arrangement of capillary specification, described for selecting the test dress of capillary specificationPut the flow control valve that comprises the first copper pipe, the second copper pipe and can show its spool opening degree,The entrance of described flow control valve is connected with the outlet of described the first copper pipe, described flow control valveOutlet be connected with the entrance of described the second copper pipe.
The embodiment of the invention also discloses a kind of test macro based on selecting air-conditioner capillary specificationSelect the method for capillary specification, the test macro of capillary specification for described selection air-conditionerComprise between the two-way stop valve and air-conditioning indoor and outdoor machine liquid pipe connected pipe that is connected to air-conditioner outdoor unitFor selecting the testing arrangement of capillary specification, described for selecting the test of capillary specificationDevice comprises the first copper pipe, the second copper pipe and can show the flow control valve of its spool opening degree, the entrance of described flow control valve is connected with the outlet of described the first copper pipe, described flow-controlThe outlet of valve is connected with the entrance of described the second copper pipe;The method comprises the following steps:
The spool opening degree of adjust flux control valve makes the performance of air-conditioning reach preset value;
Gather the spool opening degree of described flow control valve;
According to the spool opening degree of collected described flow control valve and preset described firstThe internal diameter of copper pipe, internal diameter and the fluid type of described the second copper pipe, calculate the target capillary of flowing throughThe first-class value of the fluid of pipe, to select corresponding target capillary specification.
Preferably, the method also comprises following checking procedure:
Gather described the first manometric force value and described the second manometric force value;
According to described the first manometric force value, described the second manometric force value and presetThe internal diameter, internal diameter and the fluid type of described the second copper pipe of described the first copper pipe, calculate streamThrough the second value of target fluid capillaceous;
Judge whether described first-class value equates with described second value, if so, according to described inFirst-class value is selected corresponding target capillary specification, if not, and process ends.
Preferably, the method is further comprising the steps of:
The corresponding table of searching fluid flow and capillary specification, obtains and demonstration and described first-class valueCorresponding target capillary specification.
Disclosed by the invention a kind of for selecting the testing arrangement of capillary specification, first flow by adjustingThe spool opening degree of control valve, makes the systematicness of the equipment being connected with testing arrangement of the present inventionCan index reach preset value, then according to the spool opening degree of flow control valve and this flow of flowing throughThe flow of the fluid of control valve (is the system performance index of the equipment fluid flow while reaching the best) between corresponding relation, and corresponding relation between fluid flow and capillary specification, choosingSelect the target capillary of appropriate size. Relatively in prior art, pass through to change the capillary of different sizePipe makes fluid flow drop into normal range (NR), and then the system performance index of equipment is reachedThe technical scheme requiring, the present invention is without changing capillary, not only simplified that capillary selectsOperation, has also avoided the stability of the system of the equipment that affects, and has stopped the leakage of fluid, withTime, the selection of capillary specification, without the experience that relies on operating personnel, has precisely excellent fastPoint.
Brief description of the drawings
Fig. 1 be in the present invention for selecting the signal of the first embodiment of testing arrangement of capillary specificationFigure;
Fig. 2 be in the present invention for selecting the signal of the second embodiment of testing arrangement of capillary specificationFigure;
Fig. 3 is the block diagram of the test macro of the selection air-conditioner capillary specification in the present invention;
Fig. 4 is the schematic flow sheet of the first embodiment of the system of selection of capillary specification of the present invention;
Fig. 5 is the schematic flow sheet of the second embodiment of the system of selection of capillary specification of the present invention;
Fig. 6 is the schematic flow sheet of the 3rd embodiment of the system of selection of capillary specification of the present invention.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are done into one with reference to accompanying drawingStep explanation.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, and be not used inLimit the present invention.
The invention discloses a kind of for selecting the testing arrangement of capillary specification, can be with reference to Fig. 1, Fig. 1For in the present invention for selecting the schematic diagram of the first embodiment of testing arrangement of capillary specification. This testing arrangement comprises the first copper pipe 1, the second copper pipe 2 and can show its spool opening degreeFlow control valve 3, the entrance of flow control valve 3 is connected with the outlet of the first copper pipe 1, flow-controlThe outlet of valve 3 is connected with the entrance of the second copper pipe 2. Can according in the present embodiment for selecting hairThe spool opening degree of the flow control valve 3 of the testing arrangement of tubule specification and the first preset bronze medalThe internal diameter of pipe 1, internal diameter and the fluid type of the second copper pipe 2, calculate the target of flowing through capillaceousThe first-class value of fluid, then according to the corresponding relation between fluid flow value and capillary specification, obtain target optimum specifications capillaceous.
Concrete debug process is: first by the spool opening degree of adjust flux control valve 3, make and thisThe system performance index of the equipment that invention testing arrangement connects reaches preset value; Then according to flowThe spool opening degree of control valve 3 (is flowed through this with the flow value of the fluid of this flow control valve 3 of flowing throughThe flow value of the fluid of flow control valve 3 is the target of flowing through fluid flow value capillaceous) betweenCorresponding relation (at the internal diameter of the internal diameter of the first copper pipe 1, the second copper pipe 2 and fluid type onlyOne determine after, the fluid of the spool opening degree of flow control valve 3 and this flow control valve 3 of flowing throughFlow value is corresponding one by one), and corresponding relation between fluid flow value and capillary specification,Select target optimum specifications capillaceous. Relatively in prior art, pass through to change the hair of different sizeTubule makes fluid flow drop into normal range (NR), and then makesThe system performance index of the equipment of obtaining meets the requirements of technical scheme, and the present invention is without changing capillary, not only simplify the operation that capillary is selected, also avoid the shadow of the stability of a system to equipmentRing, and the leakage of having stopped fluid, meanwhile, the selection of capillary specification, only need be according to fluidFlow value corresponding selection specification capillaceous, without the experience that relies on operating personnel, has preciselyAdvantage fast.
In specific embodiment, with reference to Fig. 2, Fig. 2 be in the present invention for selecting capillary specificationThe schematic diagram of the second embodiment of testing arrangement. This in having implemented for selecting capillary specificationTesting arrangement on the basis of above-described embodiment, also comprise the first Pressure gauge 4 and the second Pressure gauge 5, the first Pressure gauge 4 and the first copper pipe 1 are communicated with to record the force value of fluid in the first copper pipe 1,Two Pressure gauges 5 and described the second copper pipe 2 are communicated with to record the force value of fluid in the second copper pipe 2. CauseFor according to the force value of the force value of the first Pressure gauge 4, the second Pressure gauge 5 and presetThe internal diameter of one copper pipe 1, internal diameter and the fluid type of the second copper pipe 2, can calculate the target hair of flowing throughThe second value of the fluid of tubule, so can be by arranging the first Pressure gauge 4 and the second pressureThe target of the flowing through fluid capillaceous that table 5 obtains the spool opening degree according to flow control valve 3Flow value carries out verification.
When according to the internal diameter, of the spool opening degree of flow control valve 3 and preset the first copper pipe 1The internal diameter of two copper pipes 2 and fluid type, the first-class of target fluid capillaceous of flowing through calculatingValue, and according to the force value of the force value of the first Pressure gauge 4, the second Pressure gauge 5 and pre-The internal diameter of the first copper pipe 1 of putting, internal diameter and the fluid type of the second copper pipe 2, what calculate flows throughWhen the second value of target fluid capillaceous equates, it is right to select according to first-class valueThe target capillary specification of answering, otherwise first-class value should not be used to select target capillary specification。
The present invention can be by manually calculating according to the first-class value of each calculation of parameter, also can be by calculating mouldPiece calculates automatically according to presetting rule. In specific embodiment, the present invention is used for selecting hairThe testing arrangement of tubule specification also comprises acquisition module and the first computing module; Wherein, gather mouldPiece, for the spool opening degree of acquisition stream control valve 3; The first computing module, for according to streamThe internal diameter of the spool opening degree of control valve 3 and the first preset copper pipe 1, the second copper pipe 2Internal diameter and fluid type, calculate the first-class value of the target fluid capillaceous of flowing through.
The embodiment that is used for the testing arrangement of selecting capillary specification in the present invention comprises the first Pressure gauge4 and when the second Pressure gauge 5, can be by manually calculating, also according to each calculation of parameter second valueCan automatically be calculated according to presetting rule by computing module. In specific embodiment, gatherModule is also for gathering the force value of the first Pressure gauge 4 and the force value of the second Pressure gauge 5; This useAlso comprise the second computing module and judge module in the testing arrangement of selecting capillary specification; Wherein, the second computing module, for rootAccording to the force value of the first Pressure gauge 4, the force value of the second Pressure gauge 5 and the first preset bronze medalThe internal diameter of pipe 1, internal diameter and the fluid type of the second copper pipe 2, calculate the target of flowing through capillaceousThe second value of fluid; Judge module, for contrasting first-class value and second value isNo equating, and export judged result.
In specific embodiment, in order to simplify the calculating of first-class value and/or second value, firstThe internal diameter of the internal diameter of copper pipe 1 and the second copper pipe 2 equates.
The present invention is for selecting the testing arrangement of capillary specification can be used to air-conditioning, refrigerator and washing machineIn debug system Deng equipment.
The invention also discloses a kind of test macro of selecting air-conditioner capillary specification, can be with reference to figure3, Fig. 3 is the block diagram of the test macro of the selection air-conditioner capillary specification in the present invention. ThisInvention selects the air-conditioner test macro of capillary specification to comprise the two-way cut-off of air-conditioner outdoor unitValve 6, air-conditioning indoor and outdoor machine liquid pipe connected pipe 7 and for selecting the testing arrangement of capillary specification8, be wherein any structure of above-described embodiment for selecting the testing arrangement 8 of capillary specification, its concrete structure can, with reference to above-mentioned embodiment and Fig. 1 and Fig. 2, not repeat them here. TheThe arrival end of one copper pipe 1 is arranged to horn mouth shape, and the port of export of the second copper pipe 2 is welded with copper and connectsHead, the arrival end of the first copper pipe 1 is connected to two-way stop valve 6, the second copper pipes of air-conditioner outdoor unitOne end that 2 the port of export is connected with air-conditioning indoor and outdoor machine liquid pipe connected pipe 7 connects, inside and outside air conditioning chamberThe other end of machine liquid pipe connected pipe 7 is connected to indoor apparatus of air conditioner, for selecting capillary specificationThe two-way stop valve 6 that testing arrangement 8 is connected to air-conditioner outdoor unit is connected with air-conditioning indoor and outdoor machine liquid pipeBetween pipe 7. Because this embodiment of the invention is selected the air-conditioner test macro bag of capillary specificationContain in above-described embodiment for selecting the testing arrangement of capillary specification, so relatively existingTechnology, its have in above-described embodiment for selecting testing arrangement all of capillary specificationAdvantage, as simplified the operation that capillary is selected, avoid the shadow of the stability of a system to equipmentRing, and the leakage of having stopped fluid, meanwhile, the selection of capillary specification, only need be according to fluidFlow value corresponding selection specification capillaceous, without the experience that relies on operating personnel, has preciselyAdvantage fast.
The invention also discloses a kind of system of selection of capillary specification, this system of selection is based on above-mentionedEmbodiment selects the test macro of air-conditioner capillary specification, and with reference to Fig. 4, Fig. 4 is thisThe schematic flow sheet of the first embodiment of the system of selection of bright capillary specification. In this embodimentThe system of selection of this capillary specification and above-mentioned for select capillary specification testing arrangementOne embodiment correspondence, it comprisesFollowing steps:
Step S01, the spool opening degree of adjust flux control valve makes the performance of air-conditioning reach preset value;
Step S02, the spool opening degree of acquisition stream control valve;
Step S03, according to the spool opening degree of collected flow control valve and preset firstThe internal diameter of copper pipe, internal diameter and the fluid type of the second copper pipe, calculate the target of flowing through capillaceousThe first-class value of fluid, to select corresponding capillary specification.
With reference to Fig. 5, Fig. 5 is that the flow process of the second embodiment of the system of selection of capillary specification of the present invention is shownIntention. The system of selection of this capillary specification in this embodiment comprises the following steps:
Step S11, the spool opening degree of adjust flux control valve makes the performance of air-conditioning reach preset value;
Step S12, the spool opening degree of acquisition stream control valve;
Step S13, according to the spool opening degree of collected flow control valve and preset firstThe internal diameter of copper pipe, internal diameter and the fluid type of the second copper pipe, calculate the target of flowing through capillaceousThe first-class value of fluid;
Step S14, searches the corresponding table of fluid flow and capillary specification, obtains and demonstration and first-classThe capillary specification that value is corresponding.
With reference to Fig. 6, Fig. 6 is that the flow process of the 3rd embodiment of the system of selection of capillary specification of the present invention is shownIntention. The system of selection of this capillary specification in this embodiment and above-mentioned for selecting capillaryThe second embodiment correspondence of the testing arrangement of specification, it comprises the following steps:
Step S21, the spool opening degree of adjust flux control valve makes the performance of air-conditioning reach preset value;
Step S22, the spool opening degree of acquisition stream control valve, the first manometric force value and secondManometric force value;
Step S23, according to the spool opening degree of collected flow control valve and preset firstThe internal diameter of copper pipe, internal diameter and the fluid type of the second copper pipe, calculate the target of flowing through capillaceousThe first-class value of fluid;
Step S24, according to the first manometric force value, the second manometric force value and presetThe internal diameter, internal diameter and the fluid type of the second copper pipe of the first copper pipe, calculate the target hair of flowing throughThe second value of the fluid of tubule;
Step S25, judges whether first-class value equates with second value, if so, according to firstFlow value is selected corresponding target capillary specification, if not, and process ends.
Preferably, the present embodiment also comprises: step S26, searches the right of fluid flow and capillary specificationShould show, obtain and target capillary specification that demonstration is corresponding with first-class value.
The system of selection of this embodiment of the invention capillary specification, first by adjust flux control valveSpool opening degree, makes the performance of air-conditioning reach preset value, then according to the valve of flow control valveCore opening degree (is the system performance index of air-conditioning with the flow of the fluid of this flow control valve of flowing throughFluid flow while reaching the best) between corresponding relation, and fluid flow and capillary ruleCorresponding relation between lattice, the target capillary of selection appropriate size. Relatively logical in prior artCross the capillary of changing different size and make fluid flow drop into normal range (NR), and then make to have leisureThe system performance index of adjusting meets the requirements of technical scheme, and the present invention is without changing capillary, noBut simplify the operation that capillary is selected, also avoided the stability of the system of the equipment that affects, andStopped the leakage of fluid, meanwhile, the selection of capillary specification, only need be according to fluid flow valueCorresponding selection specification capillaceous, without the experience that relies on operating personnel, has precisely fastAdvantage.
In addition, the embodiment of the present invention is compared by second value and first-class value, to complying withThe target of the flowing through fluid flow value capillaceous obtaining according to the spool opening degree of flow control valve is enteredRow verification, can prevent from occurring larger fluctuation because external disturbance makes first-class value, and affectThe selection of target capillary specification.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do, or be directly or indirectly used in other relevant technical fields, be all in like manner included in of the present inventionIn scope of patent protection.
Claims (6)
1. for selecting a testing arrangement for capillary specification, it is characterized in that, comprise the first copper pipe,The second copper pipe and can show the flow control valve of its spool opening degree, the entrance of described flow control valve withThe outlet of described the first copper pipe connects, and the entrance of the outlet of described flow control valve and described the second copper pipe connectsConnect;
This testing arrangement also comprises:
Acquisition module, for gathering the spool opening degree of described flow control valve;
The first computing module, for according to the spool opening degree of described flow control valve and preset instituteState the internal diameter of the first copper pipe, internal diameter and the fluid type of described the second copper pipe, calculate the target capillary of flowing throughThe first-class value of the fluid of pipe, to select corresponding target capillary specification;
The first Pressure gauge, is communicated with to record the force value of fluid in described the first copper pipe with described the first copper pipe;
The second Pressure gauge, is communicated with to record the force value of fluid in described the second copper pipe with described the second copper pipe;
Described acquisition module is also for gathering described the first manometric force value and described second manometricForce value;
This testing arrangement also comprises the second computing module, for according to described the first manometric force value,Internal diameter, described second copper pipe of described the second manometric force value and preset described the first copper pipeInternal diameter and fluid type, calculate the second value of the target fluid capillaceous of flowing through;
And judge module, whether equate with described second value for contrasting described first-class value, andOutput judged result.
2. testing arrangement according to claim 1, is characterized in that, the internal diameter of described the first copper pipeEquate with the internal diameter of described the second copper pipe.
3. a test macro of selecting air-conditioner capillary specification, is characterized in that, comprises that right willAsk described in 1 or 2 for selecting the testing arrangement of capillary specification, this testing arrangement is connected air-conditioningBetween the two-way stop valve of off-premises station and air-conditioning indoor and outdoor machine liquid pipe connected pipe.
4. select a method for capillary specification based on test macro described in claim 3, its featureBe, comprise the following steps:
The spool opening degree of adjust flux control valve makes the performance of air-conditioning reach preset value;
Gather the spool opening degree of described flow control valve;
According to the spool opening degree of collected described flow control valve and preset described the first bronze medalThe internal diameter of pipe, internal diameter and the fluid type of described the second copper pipe, calculate the target of flowing through fluid capillaceousFirst-class value, to select corresponding target capillary specification.
5. method according to claim 4, is characterized in that, also comprises following checking procedure:
Gather described the first manometric force value and described the second manometric force value;
According to described the first manometric force value, described the second manometric force value and presetThe internal diameter of described the first copper pipe, internal diameter and the fluid type of described the second copper pipe, calculate the target hair of flowing throughThe second value of the fluid of tubule;
Judge whether described first-class value equates with described second value, if so, according to describedOne flow value is selected corresponding target capillary specification, if not, and process ends.
6. according to the method described in claim 4 or 5, it is characterized in that, further comprising the steps of:
The corresponding table of searching fluid flow and capillary specification, obtains and demonstration and described first-class value pairThe target capillary specification of answering.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210527919.7A CN102997519B (en) | 2012-12-07 | 2012-12-07 | For selecting testing arrangement, the system and method for capillary specification |
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| CN201210527919.7A CN102997519B (en) | 2012-12-07 | 2012-12-07 | For selecting testing arrangement, the system and method for capillary specification |
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| CN102997519A CN102997519A (en) | 2013-03-27 |
| CN102997519B true CN102997519B (en) | 2016-05-11 |
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| CN109974350A (en) * | 2019-03-06 | 2019-07-05 | 青岛海尔空调器有限总公司 | A kind of method and debugging air conditioner model machine of determining target capillary pipe length |
| CN116499148A (en) * | 2022-11-18 | 2023-07-28 | 江苏拓米洛高端装备股份有限公司 | Capillary calibration device system and calibration method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1368640A1 (en) * | 1985-10-25 | 1988-01-23 | Львовский политехнический институт им.Ленинского комсомола | Device for measuring small and microflows of gas |
| CN2690813Y (en) * | 2003-11-08 | 2005-04-06 | 海尔集团公司 | Air conditioner with outdoor unit heat by pass control structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08152346A (en) * | 1994-11-30 | 1996-06-11 | Nippon Sanso Kk | Method and apparatus for measuring flow rate of gas and gas flow rate setter |
| JP4753251B2 (en) * | 2006-03-17 | 2011-08-24 | 創研工業株式会社 | Gas flow meter and gas flow control device |
-
2012
- 2012-12-07 CN CN201210527919.7A patent/CN102997519B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1368640A1 (en) * | 1985-10-25 | 1988-01-23 | Львовский политехнический институт им.Ленинского комсомола | Device for measuring small and microflows of gas |
| CN2690813Y (en) * | 2003-11-08 | 2005-04-06 | 海尔集团公司 | Air conditioner with outdoor unit heat by pass control structure |
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