CN104089381B - Device and method for detecting combustible refrigerant leakage and air conditioner - Google Patents
Device and method for detecting combustible refrigerant leakage and air conditioner Download PDFInfo
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- CN104089381B CN104089381B CN201410287106.4A CN201410287106A CN104089381B CN 104089381 B CN104089381 B CN 104089381B CN 201410287106 A CN201410287106 A CN 201410287106A CN 104089381 B CN104089381 B CN 104089381B
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- infrared signal
- conditioner
- air
- signal receiver
- combustible refrigerant
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000975 dye Substances 0.000 claims description 44
- 239000006200 vaporizer Substances 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 17
- 230000004438 eyesight Effects 0.000 claims description 16
- 239000000654 additive Substances 0.000 claims description 13
- 230000000996 additive effect Effects 0.000 claims description 13
- 238000004043 dyeing Methods 0.000 abstract 2
- 238000004880 explosion Methods 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009102 absorption Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000001044 red dye Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a device and a method for detecting combustible refrigerant leakage and an air conditioner. The device comprises a controller, an infrared signal transmitter, an infrared signal receiver and a paper dyeing structure, wherein the controller is positioned in an air conditioner internal unit; the infrared signal receiver is arranged on the side where combustible refrigerant is easy to leak in the air conditioner indoor unit; the infrared signal transmitter is arranged on the air conditioner indoor unit, and the distance between the infrared signal transmitter and the position of the infrared signal receiver is within a preset distance range; the infrared signal transmitter and the infrared signal receiver are respectively and electrically connected with the controller; the paper dyeing structure is arranged between the infrared signal transmitter and the infrared signal receiver. The device simple structure, easy to carry out, and can guarantee the safe operation of air conditioner and use user's personal safety, prevent the danger of the burning that flammable refrigerant leaked and arouse even explosion.
Description
Technical field
The present invention relates to use the air-conditioner field of combustible refrigerant, particularly relate to detect the dress of combustible refrigerant leakage
Put, method and air-conditioner.
Background technology
Combustible refrigerant application in air-conditioner is conducive to environmental conservation, yet with the feature that it is inflammable and explosive,
During combustible refrigerant air-conditioning uses, if leakage occurs, the danger that burning is even exploded may be caused.
Summary of the invention
Combustible refrigerant for air-conditioner leaks the problem that burning can be caused even to explode, and the invention provides a kind of guarantor
Device, method and the air-conditioner of the detection combustible refrigerant leakage of card air-conditioner safe operation.
For reaching technical purpose, the embodiment of the present invention adopts the following technical scheme that
The present invention provides a kind of device detecting combustible refrigerant leakage, and including controller, described controller is positioned at air-conditioning
In device in machine, also include Infrared Projector, infrared signal receiver and dye paper structure；
Described infrared signal receiver is arranged on described internal machine of air-conditioner and easily leaks out combustible refrigerant side；
Described Infrared Projector is arranged on described internal machine of air-conditioner, and with the position of described infrared signal receiver
At a distance of in the range of predeterminable range；
Described Infrared Projector and described infrared signal receiver electrically connect with described controller respectively；
Described dye paper structure is arranged between described Infrared Projector and described infrared signal receiver.
As a kind of embodiment, described dye paper structure includes receiving window and dye paper；
Described dye paper is arranged on described reception window.
As a kind of embodiment, described infrared signal receiver is arranged at pipe joint；
Described pipe joint is positioned on the external connecting pipe of internal machine of air-conditioner.
As a kind of embodiment, described infrared signal receiver is arranged at vaporizer eyesight elbow；
Described vaporizer eyesight elbow is arranged on an evaporator；
Described vaporizer is positioned in described internal machine of air-conditioner.
As a kind of embodiment, described infrared signal receiver has two；
One described infrared signal receiver is arranged at pipe joint, and described pipe joint is positioned at outside described internal machine of air-conditioner
In portion's connecting tube；
Another described infrared signal receiver is arranged at vaporizer eyesight elbow, and described vaporizer eyesight elbow is arranged on steaming
Sending out on device, described vaporizer is positioned in described internal machine of air-conditioner.
The present invention also provides for a kind of air-conditioner, including the device detecting combustible refrigerant leakage as above.
The present invention provides again a kind of method detecting combustible refrigerant leakage, comprises the following steps:
Controller controls Infrared Projector and launches infrared signal；
Infrared signal receiver detects the described infrared signal by contaminating paper structure that described Infrared Projector is launched；
Testing result is fed back to described controller by described infrared signal receiver；
Described controller controls air-conditioner according to described testing result and runs.
As a kind of embodiment, before described controller controls Infrared Projector transmitting infrared signal, also wrap
Include following steps:
The additive of dark color system is added in combustible refrigerant.
As a kind of embodiment, described controller controls air-conditioner according to described testing result and runs, including walking as follows
Rapid:
Judge whether described infrared signal receiver detects described infrared signal；
It is properly functioning that the most described controller controls air-conditioner；
If it is not, the most described controller control air-conditioner is out of service and sends alarm signal.
As a kind of embodiment, described air-conditioner is above-mentioned air-conditioner.
Beneficial effects of the present invention:
Device, method and the air-conditioner of the detection combustible refrigerant leakage of the present invention.Wherein device includes being arranged on air-conditioning
In device, machine easily leaks out the infrared signal receiver that combustible refrigerant is surveyed, with infrared signal receiver position at a distance of at predeterminable range
In the range of, the Infrared Projector that is arranged on internal machine of air-conditioner and be positioned at infrared signal receiver and Infrared Projector
Between dye paper structure, the dye paper structure additive that can be by dark color dyes dark color, when contaminating paper structure and dying dark color, infrared letter
The infrared signal that number emitter is launched can not be received by infrared signal receiver, thus feed back to controller air-conditioner and occur flammable
Cold-producing medium leaks, if dye paper structure is not dyed to dark color, infrared signal receiver can receive Infrared Projector and send out
The infrared signal penetrated, thus feed back to controller air-conditioner and normally work.When controller receives air-conditioner leakage signal, control
Air-conditioner processed is out of service and sends alarm signal, reminds user to take measures in time；If it is normal that controller receives air-conditioner
During working signal, do not process.Thus can prevent the danger that the burning of combustible refrigerant leakage initiation is even exploded,
Ensure the safe operation of air-conditioner, and ensure to use the personal safety of user；And this apparatus structure is simple, it is easy to implement.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the device of the detection combustible refrigerant leakage of the present invention；
Fig. 2 is the structural representation of another embodiment of the device of the detection combustible refrigerant leakage of the present invention；
Fig. 3 is the schematic flow sheet of an embodiment of the method for the detection combustible refrigerant leakage of the present invention；
Fig. 4 is the schematic flow sheet of another embodiment of the method for the detection combustible refrigerant leakage of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples pair
The present invention detects device, method and the air-conditioner of combustible refrigerant leakage and is further elaborated.Should be appreciated that this place
The specific embodiment described, only in order to explain the present invention, is not intended to limit the present invention.
Seeing shown in Fig. 1, Fig. 2, the embodiment of the present invention provides a kind of device detecting combustible refrigerant leakage, including controlling
Device, controller is positioned in internal machine of air-conditioner 4, also includes Infrared Projector 2, infrared signal receiver 1 and dye paper structure 3；
Infrared signal receiver 1 is arranged on internal machine of air-conditioner 4 and easily leaks out combustible refrigerant side；Infrared Projector 2 is arranged on sky
Adjust in device on machine 4, and with the position of infrared signal receiver 1 at a distance of in the range of predeterminable range；Infrared Projector 2 and red
External signal receptor 1 is electrically connected with the controller respectively；Dye paper structure 3 is arranged on Infrared Projector 2 and IR signal reception
Between device 1.
The device of the detection combustible refrigerant leakage of the present invention, easily leaks out flammable system including being arranged on internal machine of air-conditioner 4
The infrared signal receiver 1 of cryogen side (at pipe joint or vaporizer eyesight elbow, but being not limited to this at two), connects with infrared signal
Receive device 1 position at a distance of (predeterminable range scope can set according to specific circumstances, as predeterminable range scope can in predeterminable range scope
It is set to 20cm) in, the Infrared Projector 2 being arranged on internal machine of air-conditioner 4, and it is positioned at infrared signal receiver 1 and red
Dye paper structure 3 between external signal emitter 2, infrared signal receiver 1 and Infrared Projector 2 are all electrically connected with controller
Connect.Wherein, Infrared Projector 2 launches the Infrared Projector of power for adjustable, adjusts by adjusting transmitting power
Whole predeterminable range.This device can ensure the safe operation of air-conditioner, prevents the burning or quick-fried that combustible refrigerant leakage causes
Fried danger；And this apparatus structure is simple, it is easy to implement.
First adding the additive of a kind of dark system's (such as black or silver color) in combustible refrigerant, this additive can be with
Combustible refrigerant dissolves each other, and stable, nontoxic, not damages air conditioning system.Dye paper, when not running into additive, is transparent
Color, the infrared signal that Infrared Projector 2 is launched can be arrived by dye paper, and is received by infrared signal receiver 1；If
Combustible refrigerant leaks, and additive together leaks along with combustible refrigerant, and it is (black that the dye paper of transparent color is dyed dark color by additive
Color or silver color), then Infrared Projector 2 launch infrared signal through dye paper, due to dye paper have absorb and reflection
Effect (as black dye paper has Absorption, silver color dye paper has reflection), infrared signal is by weakened, it is impossible to infrared
Signal receiver 1 receives.If infrared signal receiver 1 receives infrared signal, " air-conditioner is normal just to feed back one to air-conditioner
Work " signal, controller control air-conditioner normally work；If infrared signal receiver 1 is not received by infrared signal, just give
Controller feedback one " air-conditioner leakage " signal, controller control air-conditioner out of service and send alarm signal (if sky
Adjust device to be natively in stopped status, the most only send alarm signal).
As a kind of embodiment, dye paper structure 3 includes receiving window and dye paper；Dye paper is arranged on described reception window.
In this embodiment, dye paper structure 3 includes contaminating paper and receiving window, and dye paper is arranged on reception window, and is laid in and connects
Receive on window, it is ensured that the infrared signal that Infrared Projector 2 is launched is through this dye paper；Dye paper is arranged on reception window, side
Just dye paper is fixing, it is ensured that dye paper is always positioned between infrared signal receiver 1 and Infrared Projector 2.It is worth explanation
It is that in other embodiments, dye paper structure 3 also can only include dye paper.
As a kind of embodiment, infrared signal receiver 1 is arranged at pipe joint 5；Pipe joint 5 is positioned at air-conditioner
On the external connecting pipe of machine 4.
Pipe joint 5 is the junction of connecting tube, and this place easily occurs the leakage of combustible refrigerant, by infrared signal receiver
1 is arranged at pipe joint 5, can effectively detect the leakage of combustible refrigerant, it is ensured that the safe operation of air-conditioner.
As a kind of embodiment, infrared signal receiver 1 is arranged at vaporizer eyesight elbow 6；Vaporizer eyesight elbow 6
It is arranged on vaporizer 7；Vaporizer 7 is positioned in internal machine of air-conditioner 4.
Vaporizer eyesight elbow 6 is also the place that flammable leakage easily occurs, and infrared signal receiver 1 is arranged on vaporizer
At eyesight elbow 6, can effectively detect the leakage of combustible refrigerant, it is ensured that the safe operation of air-conditioner.
As a kind of embodiment, infrared signal receiver 1 has two；One infrared signal receiver 1 is arranged on pipe
At joint 5, pipe joint 5 is positioned on the external connecting pipe of internal machine of air-conditioner 4；Another infrared signal receiver 1 is arranged on evaporation
At device eyesight elbow 6, vaporizer eyesight elbow 6 is arranged on vaporizer 7, and vaporizer 7 is positioned in internal machine of air-conditioner 4.
Pipe joint 5 and vaporizer eyesight elbow 6 are all the places that combustible refrigerant leakage easily occurs, and set respectively in these places
Putting infrared signal receiver 1, as long as there being a local leakage that combustible refrigerant occurs, controller all controls air-conditioner and stops fortune
Going and send alarm signal, it can detect that all danger even exploded due to the burning of combustible refrigerant leakage initiation, protects
The safe operation of card air-conditioner.
The present invention also provides for a kind of air-conditioner, including the device of aforesaid detection combustible refrigerant leakage.
Using the air-conditioner of said apparatus, security performance is high, can prevent combustible refrigerant leakage and cause burning even
The danger of blast, it is ensured that use the personal safety of user.
The embodiment of the present invention also provides for a kind of method detecting combustible refrigerant leakage, owing to the method solves the former of problem
Reason with aforementioned a kind of detect combustible refrigerant leakage device similar, therefore repeat in place of repeat no more, shown in Figure 3, wrap
Include following steps:
S100, controller controls Infrared Projector 2 and launches infrared signal.
S200, infrared signal receiver 1 detects the infrared signal by contaminating paper structure 3 that Infrared Projector 2 is launched.
S300, testing result is fed back to described controller by infrared signal receiver 1.
S400, controller controls air-conditioner according to testing result and runs.
The method of the detection combustible refrigerant leakage of the present invention, controller controls the per interval t of Infrared Projector 2 and sends out
Penetrating an infrared signal, time t can be arranged, and is such as set to 20s or 1min.Infrared signal receiver 1 detects by dye paper
The infrared signal of structure 3, and testing result is fed back to controller, controller controls air-conditioner fortune according to the testing result of feedback
OK.The method ensure that the safe operation of air-conditioner, prevents the danger that the burning caused because of combustible refrigerant leakage is even exploded
Danger.
As a kind of embodiment, controller controls before Infrared Projector 2 launches infrared signal, also include with
Lower step:
S010, adds the additive of dark color system in combustible refrigerant.
The additive of dark system's (such as black or silver color) can make dye paper be dyed dark color by transparent color, dyes the dye paper energy of dark color
(the dye paper such as dying black absorbs infrared signal, and the dye paper dying silver color reflects infrared letter for enough absorptions and reflection infrared signal
Number), infrared signal is due to weakened and cannot be received by infrared signal receiver 1, and infrared signal receiver 1 is not received by red
During external signal, illustrate that now air-conditioner generation combustible refrigerant leaks, feed back to one, air-conditioner " air-conditioner leakage " signal, enter
And it is out of service and send alarm signal to control air-conditioner, user is reminded to take measures in time, it is ensured that the safety of user.Infrared letter
When number receptor 1 receives infrared signal, now air-conditioner does not occur combustible refrigerant to leak, and one, air-conditioner of feedback is " empty
Device is adjusted normally to work " signal, controller do not makes action, and air-conditioner is properly functioning.
As a kind of embodiment, shown in Figure 4, controller controls air-conditioner according to testing result and runs, including
Following steps:
S410, it is judged that whether infrared signal receiver 1 detects infrared signal；
S411, the most then controller control air-conditioner is properly functioning；
S412, if it is not, then controller control air-conditioner is out of service and sends alarm signal.
After infrared signal receiver 1 feeds back to controller testing result, controller judges that this testing result is " air-conditioner
Properly functioning " or " air-conditioner leakage " signal, if " air-conditioner is properly functioning " signal, controller does not processes, air-conditioner
Properly functioning, if " air-conditioner leakage " signal, controller control air-conditioner is out of service and sends alarm signal, if air-conditioner
Originally it is in stopped status, the most only sends alarm signal, remind user to process in time, it is ensured that the safety of user, prevent out
The danger that the burning now caused due to combustible refrigerant leakage is even exploded.
As a kind of embodiment, air-conditioner is aforesaid air-conditioner.
Aforesaid air-conditioner, with the device of detection combustible refrigerant leakage, uses the air-conditioner ability with aforementioned means
Implement above-mentioned process step, it is ensured that the safe operation of air-conditioner.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. detecting a device for combustible refrigerant leakage, including controller, described controller is positioned in internal machine of air-conditioner, and it is special
Levy and be, also include Infrared Projector, infrared signal receiver and transparent color dye paper structure；Described combustible refrigerant adds
Being additive added with dark color, if the leakage of described combustible refrigerant, transparent color is contaminated paper structure and dyes dark color by additive；
Described infrared signal receiver is arranged on described internal machine of air-conditioner and easily leaks out combustible refrigerant side；
Described Infrared Projector is arranged on described internal machine of air-conditioner, and with the position of described infrared signal receiver apart
In the range of predeterminable range；
Described Infrared Projector and described infrared signal receiver electrically connect with described controller respectively；
Described transparent color dye paper structure is arranged between described Infrared Projector and described infrared signal receiver.
The device of detection combustible refrigerant the most according to claim 1 leakage, it is characterised in that described dye paper structure includes
Receive window and dye paper；
Described dye paper is arranged on described reception window.
The device of detection combustible refrigerant the most according to claim 1 leakage, it is characterised in that described IR signal reception
Device is arranged at pipe joint；
Described pipe joint is positioned on the external connecting pipe of internal machine of air-conditioner.
The device of detection combustible refrigerant the most according to claim 1 leakage, it is characterised in that described IR signal reception
Device is arranged at vaporizer eyesight elbow；
Described vaporizer eyesight elbow is arranged on an evaporator；
Described vaporizer is positioned in described internal machine of air-conditioner.
The device of detection combustible refrigerant the most according to claim 1 leakage, it is characterised in that described IR signal reception
Device has two；
One described infrared signal receiver is arranged at pipe joint, and described pipe joint is positioned at the outside of described internal machine of air-conditioner and connects
In adapter；
Another described infrared signal receiver is arranged at vaporizer eyesight elbow, and described vaporizer eyesight elbow is arranged on vaporizer
On, described vaporizer is positioned in described internal machine of air-conditioner.
6. an air-conditioner, it is characterised in that include what the detection combustible refrigerant described in any one of claim 1 to 5 leaked
Device.
7. the method detecting combustible refrigerant leakage, it is characterised in that include that controller, described controller are positioned at air-conditioner
In interior machine, also include Infrared Projector, infrared signal receiver and transparent color dye paper structure；Described infrared signal receiver
It is arranged on described internal machine of air-conditioner and easily leaks out combustible refrigerant side；Described Infrared Projector is arranged in described air-conditioner
On machine, and with the position of described infrared signal receiver at a distance of in the range of predeterminable range；Described Infrared Projector and institute
State infrared signal receiver to electrically connect with described controller respectively；Described transparent color dye paper structure is arranged on described infrared signal and sends out
Between emitter and described infrared signal receiver；
Said method comprising the steps of:
Adding the additive of dark color system in combustible refrigerant, if the leakage of described combustible refrigerant, transparent color is contaminated paper by additive
Structure dyes dark color；
Controller controls Infrared Projector and launches infrared signal；
Infrared signal receiver detects the described infrared signal by contaminating paper structure that described Infrared Projector is launched；
Testing result is fed back to described controller by described infrared signal receiver；
Described controller controls air-conditioner according to described testing result and runs.
The method of detection combustible refrigerant the most according to claim 7 leakage, it is characterised in that described controller is according to institute
State testing result and control air-conditioner operation, comprise the steps:
Judge whether described infrared signal receiver detects described infrared signal；
It is properly functioning that the most described controller controls air-conditioner；
If it is not, the most described controller control air-conditioner is out of service and sends alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410287106.4A CN104089381B (en) | 2014-06-24 | 2014-06-24 | Device and method for detecting combustible refrigerant leakage and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410287106.4A CN104089381B (en) | 2014-06-24 | 2014-06-24 | Device and method for detecting combustible refrigerant leakage and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104089381A CN104089381A (en) | 2014-10-08 |
| CN104089381B true CN104089381B (en) | 2016-12-21 |
Family
ID=51637120
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410287106.4A Expired - Fee Related CN104089381B (en) | 2014-06-24 | 2014-06-24 | Device and method for detecting combustible refrigerant leakage and air conditioner |
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| Country | Link |
|---|---|
| CN (1) | CN104089381B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107817330A (en) * | 2017-11-01 | 2018-03-20 | 武汉四方光电科技有限公司 | Difluoromethane leak detection apparatus, detection value correction method and detection method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019119347A1 (en) * | 2019-07-17 | 2021-01-21 | Vaillant Gmbh | Method and device for measuring changes in the composition of a liquid in a circuit, in particular a heat pump system |
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| CN1201886A (en) * | 1997-06-09 | 1998-12-16 | 兰迪斯及斯特法有限公司 | Laboratory fume hood controller utilizing object detection |
| CN1882671A (en) * | 2003-11-13 | 2006-12-20 | 纳幕尔杜邦公司 | Detectable refrigerant compositions and uses thereof |
| CN101929706A (en) * | 2009-06-26 | 2010-12-29 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
| CN204043134U (en) * | 2014-06-24 | 2014-12-24 | 珠海格力电器股份有限公司 | Device for detecting leakage of combustible refrigerant and air conditioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06185839A (en) * | 1991-12-16 | 1994-07-08 | Chubu:Kk | Condition discriminator and condition surveying system |
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2014
- 2014-06-24 CN CN201410287106.4A patent/CN104089381B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201886A (en) * | 1997-06-09 | 1998-12-16 | 兰迪斯及斯特法有限公司 | Laboratory fume hood controller utilizing object detection |
| CN1882671A (en) * | 2003-11-13 | 2006-12-20 | 纳幕尔杜邦公司 | Detectable refrigerant compositions and uses thereof |
| CN101929706A (en) * | 2009-06-26 | 2010-12-29 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
| CN204043134U (en) * | 2014-06-24 | 2014-12-24 | 珠海格力电器股份有限公司 | Device for detecting leakage of combustible refrigerant and air conditioner |
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| CN107817330A (en) * | 2017-11-01 | 2018-03-20 | 武汉四方光电科技有限公司 | Difluoromethane leak detection apparatus, detection value correction method and detection method |
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|---|---|
| CN104089381A (en) | 2014-10-08 |
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