CN103292526B - The adjustment method of coolant quantity in air-conditioner and coolant circulating system - Google Patents
The adjustment method of coolant quantity in air-conditioner and coolant circulating system Download PDFInfo
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- CN103292526B CN103292526B CN201310217846.6A CN201310217846A CN103292526B CN 103292526 B CN103292526 B CN 103292526B CN 201310217846 A CN201310217846 A CN 201310217846A CN 103292526 B CN103292526 B CN 103292526B
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Abstract
The invention discloses the adjustment method of coolant quantity in a kind of air-conditioner and coolant circulating system, described air-conditioner comprises off-premises station, indoor set, the the first two-way stop valve and the first three-way cut-off valve that are communicated with off-premises station, the capillary being communicated with indoor set regulates parts, and cold medium regulator, cold medium regulator comprises three-way pipe assembly, for filling the container of refrigerant, for the interface unit that carries out vacuum exhaust, the first switch valve and second switch valve, wherein, described three-way pipe assembly regulates between parts at described the first two-way stop valve and capillary, regulate parts to be communicated with the first two-way stop valve and capillary, described three-way pipe assembly is also communicated with described interface unit, described container is communicated with described interface unit by the first switch valve, is also communicated with described the first three-way cut-off valve by second switch valve, and is positioned at the thimble place of described the first three-way cut-off valve. in refrigerant debug process of the present invention, prevent the pollution of refrigerant to air, reduced the waste of refrigerant simultaneously.<!--1-->
Description
Technical field
The present invention relates to field of refrigeration, particularly cold in a kind of air-conditioner and coolant circulating systemThe adjustment method of matchmaker's amount.
Background technology
Along with the development of Refrigeration Technique, the universal people's of the refrigeration systems such as air-conditioning life. As everyone knows, freon is the most frequently used cold-producing medium of air-conditioner, in current air-conditioning production process, for reachingTo best exchange capability of heat and the efficiency value thereof of air-conditioner, need to carry out debugging repeatedly, to refrigerantFreon refrigerant in the circulatory system adds or discharges. In prior art, when refrigerant followsWhen freon in loop systems is too much, by the thimble at the three-way cut-off valve being connected with off-premises stationPlace discharges freon unnecessary in system. In the process of discharging, freon and air are straightContact, simultaneously easily makes freon leak outside and causes waste, and destroys smelly in atmosphereOxygen layer, has run counter to the aim of energy-saving and emission-reduction, brings many-sided to human health and ecological environmentHarm.
Summary of the invention
Main purpose of the present invention is to provide a kind of air-conditioner, is intended to prevent in refrigerant debug process coldThe pollution of matchmaker to air reduces the waste of refrigerant simultaneously.
In order to realize goal of the invention, the invention provides a kind of air-conditioner, described air-conditioner comprises off-premises station, indoor set, the first two-way stop valve and the first three-way cut-off valve that are communicated with off-premises station, with chamberThe capillary that interior machine is communicated with regulates parts, and cold medium regulator, described cold medium regulatorComprise three-way pipe assembly, for filling container, the first switch valve and the second switch valve of refrigerant, itsIn, described three-way pipe assembly regulates between parts at described the first two-way stop valve and capillary, be communicated with the first two-way stop valve and capillary and regulate parts; Described container is by the first switch valveConnecting tee pipe assembly, described container is also by second switch valve and described the first three-way cut-off valveBe communicated with.
Preferably, described cold medium regulator also comprises interface unit, and described interface unit is arranged on instituteState between three-way pipe assembly and described the first switch valve and be communicated with described three-way pipe assembly and described firstSwitch valve; Described three-way pipe assembly has first end, the second end and the 3rd end, and its first end is logicalCross the first tube connector withDescribed the first two-way stop valve is communicated with, and the second end regulates by the second tube connector and described capillaryMembers, the 3rd end is communicated with described interface unit.
Preferably, the first end of described three-way pipe assembly and the second end are equipped with pipe joint, and described firstTube connector, the second tube connector are equipped with the copper nut with described pipe joint adaptation.
Preferably, described interface unit is the second three-way cut-off valve, and this second three-way cut-off valve hasOne end, the second end and the 3rd end, its first end is communicated with described three-way pipe assembly, the second end withDescribed the first switch valve is communicated with, and the 3rd end is communicated with vacuum breathing apparatus.
Preferably, described second switch valve is communicated with described container by the 4th tube connector, and the described the 4thTube connector is provided with the pressure measuring instrument for detection of intraductal atmospheric pressure.
Preferably, described the first switch valve is two-way stop valve; Described second switch valve is two-way cut-offValve.
The present invention also provides the adjustment method of coolant quantity in a kind of coolant circulating system, this refrigerant circulation systemIn system, the adjustment method of coolant quantity comprises the following steps:
Air-conditioner refrigerating operaton;
Exchange capability of heat and power consumption while detecting air-conditioner operation, and judge that according to the result detecting refrigerant followsRefrigerant in loop systems is excessive or a small amount of;
Carry out refrigerant debugging, in the time that the refrigerant in coolant circulating system is a small amount of, controls the first switch valve and closeClose, control second switch valve and open; In the time that the refrigerant in coolant circulating system is excessive, control theOne switch valve is opened, and controls second switch valve and closes.
Preferably, also comprise before by the step of air-conditioner refrigerating operaton described:
In container, be filled with refrigerant, make the air pressure in container reach preset value;
By in described cold medium regulator access coolant circulating system.
Preferably, the atmospheric pressure value that described preset value is greater than the first three-way cut-off valve place is less than three-way pipe assemblyThe atmospheric pressure value at place.
Preferably, described cold medium regulator is accessed to the step in coolant circulating system before also bagDraw together: in the time that in container, refrigerant reaches preset value, the weight of weighing container; And
Carry out refrigerant debugging described, in the time that the refrigerant in coolant circulating system is a small amount of, controls first and openPass valve cuts out, and controls second switch valve and opens; In the time that the refrigerant in coolant circulating system is excessive,Control the first switch valve and open, after the step that control second switch valve cuts out, be also included in refrigerantAfter having debugged, the weight of weighing container.
Air-conditioner provided by the invention passes through to control the first switch valve and second switch valve opening/closing, fromAnd will inject coolant circulating system in the refrigerant in container, or cold by coolant circulating systemMatchmaker injects container, thereby realizes the demarcation of the coolant quantity in air-conditioner. Due to the process in debuggingIn, refrigerant is without contacting with air, thereby effectively prevents the pollution of refrigerant to air, simultaneouslyReduce the waste of refrigerant.
Brief description of the drawings
Fig. 1 is the structural representation of air-conditioner one embodiment of the present invention;
Fig. 2 is the connection diagram of three-way pipe assembly in Fig. 1;
Fig. 3 is the schematic flow sheet of adjustment method one embodiment of coolant quantity in coolant circulating system of the present invention；
Fig. 4 is the flow process signal of another embodiment of adjustment method of coolant quantity in coolant circulating system of the present inventionFigure.
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 provides a kind of air-conditioner.
With reference to Fig. 1, Fig. 1 is the structural representation of air-conditioner one embodiment of the present invention, in the present embodiment, described air-conditioner comprises off-premises station 10, indoor set 20, the first two-way being communicated with off-premises station 10Stop valve 30 and the first three-way cut-off valve 40, the capillary being communicated with indoor set 20 regulate parts 50With cold medium regulator 60, described cold medium regulator 60 comprises three-way pipe assembly 61, for coldMatchmaker's container 62, the first switch valve 64 and second switch valve 65, wherein, 61 of three-way pipe assembliesRegulate between parts 50 in the first two-way stop valve 30 and capillary, be communicated with the first two-way stop valve30 and capillary regulate parts 50; Described container 62 is by the first switch valve 64 connecting tee pipe groupsPart 61, described container 62 is also communicated with described the first three-way cut-off valve 40 by second switch valve 65。
In the present embodiment, the coolant quantity of above-mentioned cold medium regulator 60 to coolant circulating system in air-conditionerRegulate, comprise the refrigerant in said vesse 62 is added in coolant circulating system, orRefrigerant is followedRefrigerant in loop systems is expelled to container 62. Above-mentioned second switch valve 65 and the first three-way cut-off valve40 location optimizations that are communicated with are the thimble place that is positioned at three-way pipe assembly.
In the time that needs are debugged air-conditioner, first by above-mentioned cold medium regulator access refrigerant circulationIn system, be connected into the first two-way stop valve 30 and capillary adjusting by above-mentioned three-way pipe assembly 61Pipeline between parts 50; Second switch valve 65 is communicated with above-mentioned the first three-way cut-off valve 40.Tester starts air-conditioner, and makes air-conditioner refrigerating operaton under mark condition, and according to air-conditionerThe state judgement of operation need to add refrigerant still to need to coolant circulating systemRefrigerant in system is discharged.
When need to discharge in coolant circulating system refrigerant time, control the first switch valve 64 open, secondSwitch valve 65 cuts out, now the refrigerant in coolant circulating system will be by three-way pipe assembly 61, connectMouthpiece 63 and the first switch valve 64 flow in container 62, thereby make refrigerant from coolant circulating systemIn in discharge, to reduce the amount of refrigerant in coolant circulating system.
When needs are when adding refrigerant in coolant circulating system, control the first switch valve 64 and close, secondSwitch valve 65 is opened, and now the refrigerant in container 62 will be by second switch valve 65, the first threewayStop valve 40 flows in coolant circulating system, thereby makes the refrigerant in container 62 flow into refrigerant circulationIn system, to increase the amount of refrigerant in coolant circulating system.
It should be noted that in the present embodiment, before debugging, the air pressure of the refrigerant in container 62Value P can arrange according to actual needs, as long as it is large to meet the atmospheric pressure value P of the refrigerant in container 62In the atmospheric pressure value P1 at the first three-way cut-off valve 40 places and be less than the atmospheric pressure value P2 at three-way pipe assembly 61 places. Be P1 < P < P2, taking freon R22 as example, the air pressure at indoor set the first three-way cut-off valve 40 placesValue P1 is generally 4.5 ~ 5.0kg, and three-way pipe assembly 61 place's freon pressure P 2 are 16 ~ 18kg, excellentSelection of land, P is set to (P1+P2)/2.
Air-conditioner provided by the invention is by controlling the first switch valve 64 and second switch valve 65 opening/closingsThereby, will in the refrigerant in container 62, inject coolant circulating system, or by coolant circulating systemInterior refrigerant injects container 62, thereby realizes the demarcation of the coolant quantity in air-conditioner. Owing to adjustingIn the process of examination, refrigerant is without contacting with air, thereby effectively prevents the dirt of refrigerant to airDye, reduced the waste of refrigerant simultaneously.
In conjunction with reference to Fig. 2, Fig. 2 is the connection diagram of three-way pipe assembly in Fig. 1. In the present embodiment, instituteState cold medium regulator and also comprise interface unit 60, described interface unit 60 is arranged on described threewayBetween pipe assembly 61 and described the first switch valve 64, be communicated with described three-way pipe assembly 61 and described firstSwitch valve 64;Above-mentioned three-way pipe assembly 61 has first end 601, the second end 602 and the 3rd end 603, its first end601 are communicated with described the first two-way stop valve 30 by the first tube connector 70, and the second end 602 passes throughThe second tube connector 80 regulates parts 50 to be communicated with described capillary, the 3rd end 603 and described interface portionPart 63 is communicated with.
In the present embodiment, carrying out before refrigerant debugging, first by a vacuum breathing apparatus and interface portionPart 63 is communicated with, and the pipeline being communicated with is carried out to pump-down process. After pump-down process, will with off-premises station 20Switch valve (not shown) open, using by interior off-premises station 20 original refrigerant as wholeThe refrigerant of coolant circulating system uses. It should be noted that above-mentioned three-way pipe assembly 61 is by firstMouthpiece, the second mouthpiece and the 3rd mouthpiece composition, wherein first interface pipe, the second interfaceOne end of pipe and the 3rd mouthpiece composition is interconnected, and the other end of first interface pipe is three-way pipeThe other end of first end 601, the second mouthpieces of assembly 61 is the second end 6 of three-way pipe assembly 61The other end of 02, the three mouthpiece is the 3rd end 603 of three-way pipe assembly 61.
The each end of three-way pipe assembly 61 can arrange according to actual needs with the connected mode of external devices,In the present embodiment, preferably, the first end 601 of above-mentioned three-way pipe assembly 61 and the second end 602 are equalBe provided with pipe joint, described the first tube connector 70, the second tube connector 80 are equipped with and described pipe jointAdaptive copper nut, coordinates with copper nut by corresponding pipe joint the of three-way pipe assembly 61One end 601 is communicated with the first tube connector 70, and the second end 602 of three-way pipe assembly 61 and second is connectedTake over 80 and be communicated with, the 3rd end 603 of three-way pipe assembly 61 can weld with described interface unit 63.
As shown in Figure 2, the first end 601 of three-way pipe assembly 61 is provided with the first pipe joint 6011, the second ends602 are provided with the first end 601 of the second pipe joint 6021, the first tube connectors 70 and three-way pipe assembly 61The first copper nut 70 that relative one end is provided with horn mouth and matches with the first pipe joint 6011One end that 1, the second tube connector 80 is relative with the second end 602 of three-way pipe assembly 61 is provided with horn mouthAnd the second copper nut 801 matching with the second pipe joint 6021.
When installation, the first end 601 of three-way pipe assembly 61 is connected with the first tube connector 70, makes threewayPipe assembly 61 is connected with the first two-way stop valve 30, and by the first two-way stop valve 30 and chamberInterior machine is connected; The second end 602 is connected with the second tube connector 80, make three-way pipe assembly 61 withCapillary regulates parts 50 to be connected, and regulates parts 50 to be connected with off-premises station by capillary; The 3rd end 603 is by welding with described interface unit 63, and opens by interface unit 63 and firstClosing valve 64 is connected with container 62.
Based on above-described embodiment, in the present embodiment, above-mentioned interface unit 63 is the second three-way cut-off valve, theTwoThree-way cut-off valve has first end, the second end and the 3rd end, its first end and described three-way pipe groupPart 61 is communicated with, and the second end is communicated with described the first switch valve 64, the 3rd end and vacuum breathing apparatusBe communicated with.
In the time that cold medium regulator 60 accesses coolant circulating system, close the first switch valve 64 and second and openClose valve 65, open the second three-way cut-off valve, by vacuum breathing apparatus draw-out device and air-conditionerInterior air, ensures that air-conditioner normally moves. It should be noted that vacuum exhaust is air-conditioning systemSystem carries out the routine operation before refrigerant debugging after having assembled, and concrete operations mode is existing skillArt, is not described in detail in this.
Further, based on above-described embodiment, second switch valve in the present embodiment cold medium regulator 6065 are connected with container 62 by the 4th tube connector, and wherein, the 4th tube connector is provided with for inspectionThe pressure measuring instrument 90 of test tube internal gas pressure, pressure measuring instrument 90 carries out reality to the refrigerant air pressure in pipeIn time, is detected, and has ensured normally carrying out of air conditioner debugging.
In the present embodiment, owing to having added pressure measuring instrument 90, make in to coolant circulating system coldIn the adjustment process of matchmaker's amount, can obtain real-time monitoring to the refrigerant atmospheric pressure value P in container 62,Be conducive to the assurance of tester to the debugging degree of accuracy, improved the operating efficiency of whole debugging.
It should be noted that for coolant quantity in coolant circulating system is quantized, a title can be setTo said vesse 62, the weight before and after debugging weighs in heavy unit. Fill refrigerant to container 62To preset value, by weighing unit, container 62 is weighed, and record the weight of container 62; After debugging is complete, by weighing unit, the container 62 unloading is weighed, and recordThe weight of container 62; By container 62 weight before and after debugging are compared, draw debug processThe changing value of middle coolant quantity, thus effectively reduce coolant quantity in coolant circulating system is demarcated againTime, improved operating efficiency.
It should be noted that above-mentioned the first switch valve 64 and second switch valve 65 can enter according to actual needsRow arranges, as long as can play on-off action. Preferably, in the present embodiment, above-mentionedOne switch valve is two-way stop valve, and described second switch valve is two-way stop valve.
The present invention also provides the debugging of coolant quantity in a kind of coolant circulating system that is applied to above-mentioned air-conditionerMethod. In conjunction with Fig. 3, Fig. 3 is that the adjustment method one of coolant quantity in coolant circulating system of the present invention is realExecute routine schematic flow sheet. Coolant quantity in the coolant circulating system of the air-conditioner that the present embodiment providesAdjustment method comprise the following steps:
Step S10, air-conditioner refrigerating operaton;
Step S20, exchange capability of heat and power consumption while detecting air-conditioner operation, and sentence according to the result detectingRefrigerant in disconnected coolant circulating system is excessive or a small amount of;
Step S30, carries out refrigerant debugging, in the time that the refrigerant in coolant circulating system is a small amount of, controls firstSwitch valve 64 cuts out, and controls second switch valve 65 and opens; When the refrigerant mistake in coolant circulating systemWhen amount, control the first switch valve 64 and open, control second switch valve 65 and close.
In the present embodiment, exchange capability of heat and power consumption while detecting air-conditioner operation, thus determine it is needsIn coolant circulating system, add refrigerant still will in coolant circulating system, to discharge refrigerant. Work as needsWhen refrigerant in coolant circulating system is discharged, control the first switch valve 64 and open, second switch valve65 close, down interface parts 63 simultaneously, and now the refrigerant in coolant circulating system will be by threeSiphunculus assembly 61, interface unit 63 and the first switch valve 64 flow in container 62, thereby make refrigerantRefrigerant in the circulatory system is discharged. When needs are when adding refrigerant in coolant circulating system, controlThe first switch valve 64 cuts out, and second switch valve 65 is opened, down interface parts 63 simultaneously, nowRefrigerant in container 62 will be flowed into refrigerant and be followed by second switch valve 65, the first three-way cut-off valve 40In loop systems, thereby the coolant quantity in coolant circulating system is increased.
Further, in conjunction with reference to Fig. 4, Fig. 4 is the debugging of coolant quantity in coolant circulating system of the present inventionThe schematic flow sheet of another embodiment of method. Based on above-described embodiment, in the present embodiment, holdingBefore row above-mentioned steps S10, also comprise:
Step S40 is filled with refrigerant in container 62, makes the air pressure in container 62 reach preset value;
Step S50, accesses described cold medium regulator 60 in coolant circulating system.
In the present embodiment, before debugging, first in container 62, be filled with a certain amount of refrigerant, shouldThe atmospheric pressure value P of the refrigerant in container 62 can arrange according to actual needs, as long as meet container 6The atmospheric pressure value P of the freon in 2 is greater than the atmospheric pressure value P1 at the first three-way cut-off valve 40 places and is less than threeThe atmospheric pressure value P2 at siphunculus assembly 61 places. Be P1 < P < P2, taking freon R22 as example, the first threewayThe atmospheric pressure value P1 at stop valve 40 places is generally 4.5 ~ 5.0kg, three-way pipe assembly 61 place's freon pressureP2 is 16 ~ 18kg, and preferably, P is set to (P1+P2)/2. When installation, first close firstSwitch valve 64 and second switch valve 65, by described cold medium regulator access refrigerant circulation be thenIn system, three-way pipe assembly 61 regulates parts 50 to be connected with the first two-way stop valve 30 and capillaryLogical, second switch valve 65 is communicated with the first three-way cut-off valve 40. Now, at described interface unit63 places extract the air in air-conditioner.
Further, based on above-described embodiment, in the present embodiment, before carrying out above-mentioned steps S50, go backComprise: when the interior refrigerant of container 62 is during to preset value, the weight of weighing container 62; And
After execution step S30, also comprise the weight of weighing container 62.
In the present embodiment, by container 62 weight before and after debugging are compared, draw in debug processThe changing value of coolant quantity, thus the time that air-conditioner is demarcated again effectively reduced, improve workMake efficiency.
Claims (8)
1. an air-conditioner, described air-conditioner comprise off-premises station, indoor set, be communicated with off-premises station firstTwo-way stop valve and the first three-way cut-off valve, and the capillary being communicated with indoor set regulates parts, its spyLevy and be, also comprise cold medium regulator, described cold medium regulator comprise three-way pipe assembly, for dressContainer, the first switch valve and the second switch valve of refrigerant, wherein, described three-way pipe assembly is positioned at describedOne two-way stop valve and capillary regulate between parts, are communicated with the first two-way stop valve and capillary adjusting portionPart; Described container is by the first switch valve connecting tee pipe assembly, and described container is also by second switch valveBe communicated with described the first three-way cut-off valve.
2. air-conditioner as claimed in claim 1, is characterized in that, described cold medium regulator also comprisesInterface unit, described interface unit is arranged between described three-way pipe assembly and described the first switch valve and is communicated withDescribed three-way pipe assembly and described the first switch valve; Described three-way pipe assembly have first end, the second end andThe 3rd end, its first end is communicated with described the first two-way stop valve by the first tube connector, and the second end passes throughThe second tube connector and described capillary regulate members, and the 3rd end is communicated with described interface unit.
3. air-conditioner as claimed in claim 2, is characterized in that, the first end of described three-way pipe assemblyBe equipped with pipe joint with the second end, described the first tube connector, the second tube connector are equipped with and described pipe jointAdaptive copper nut.
4. air-conditioner as claimed in claim 2, is characterized in that, described interface unit is the second threewayStop valve, this second three-way cut-off valve has first end, the second end and the 3rd end, its first end with described inThree-way pipe assembly is communicated with, and the second end is communicated with described the first switch valve, and the 3rd end and vacuum breathing apparatus connectLogical.
5. air-conditioner as claimed in claim 1, is characterized in that, described second switch valve is by the 4thTube connector is communicated with described container, and described the 4th tube connector is provided with for detection of the pressure of intraductal atmospheric pressure and surveysScale.
6. air-conditioner as described in any one in claim 1 to 5, is characterized in that, described the first switchValve is two-way stop valve; Described second switch valve is two-way stop valve.
7. coolant quantity in the coolant circulating system of the air-conditioner based on described in any one in claim 1 to 6Adjustment method, it is characterized in that, comprise the following steps:
In container, be filled with refrigerant, make the air pressure in container reach preset value, described preset value is greater than firstThe atmospheric pressure value at three-way cut-off valve place is less than the atmospheric pressure value at three-way pipe assembly place;
By in described cold medium regulator access coolant circulating system;
Air-conditioner refrigerating operaton;
Exchange capability of heat and power consumption while detecting air-conditioner operation, and judge refrigerant circulation according to the result detectingRefrigerant in system is excessive or a small amount of;
Carry out refrigerant debugging, in the time that the refrigerant in coolant circulating system is a small amount of, controls the first switch valve and close,Controlling second switch valve opens; In the time that the refrigerant in coolant circulating system is excessive, controls the first switch valve and beatOpen, control second switch valve and close.
8. the adjustment method of coolant quantity in coolant circulating system as claimed in claim 7, is characterized in that,Also comprise before cold medium regulator is accessed to the step in coolant circulating system described: when cold in containerWhen matchmaker reaches preset value, the weight of weighing container; And
Carry out refrigerant debugging described, in the time that the refrigerant in coolant circulating system is a small amount of, control the first switchValve cuts out, and controls second switch valve and opens; In the time that the refrigerant in coolant circulating system is excessive, control firstSwitch valve is opened, and also comprises the weight of weighing container after the step that control second switch valve cuts out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310217846.6A CN103292526B (en) | 2013-06-04 | 2013-06-04 | The adjustment method of coolant quantity in air-conditioner and coolant circulating system |
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| CN201310217846.6A CN103292526B (en) | 2013-06-04 | 2013-06-04 | The adjustment method of coolant quantity in air-conditioner and coolant circulating system |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101337B (en) * | 2017-05-08 | 2019-11-05 | 青岛海尔空调器有限总公司 | Air-conditioning system adjusting method and device |
| CN106969475B (en) * | 2017-05-08 | 2019-12-31 | 青岛海尔空调器有限总公司 | Air conditioning system adjusting method and device |
| CN108105895B (en) * | 2017-12-25 | 2024-02-02 | 珠海格力电器股份有限公司 | Air conditioner refrigerant exhaust structure and air conditioner |
| CN108931097A (en) * | 2018-09-26 | 2018-12-04 | 珠海格力电器股份有限公司 | A kind of water circulation protection system and cooler |
| CN110849007B (en) * | 2019-11-26 | 2022-04-08 | 宁波奥克斯电气股份有限公司 | Automatic refrigerant quantity adjusting and controlling method and device and air conditioner |
| CN112833578A (en) * | 2021-01-18 | 2021-05-25 | 海信（广东）空调有限公司 | Air conditioner |
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| JPH09126563A (en) * | 1995-10-30 | 1997-05-16 | Sanyo Electric Co Ltd | Freezer |
| CN2413240Y (en) * | 2000-03-08 | 2001-01-03 | 伊铁华 | Refrigerant charging recoverer |
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| CN103292526A (en) | 2013-09-11 |
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