CN206420200U - Refrigerating circulatory device - Google Patents
Refrigerating circulatory device Download PDFInfo
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- CN206420200U CN206420200U CN201590000691.3U CN201590000691U CN206420200U CN 206420200 U CN206420200 U CN 206420200U CN 201590000691 U CN201590000691 U CN 201590000691U CN 206420200 U CN206420200 U CN 206420200U
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- Prior art keywords
- refrigerant
- detecting sensor
- refrigerant leakage
- leakage
- leakage detecting
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The utility model is related to refrigerating circulatory device, and it possesses：Refrigerant loop, it possesses compressor, condenser, decompressor and evaporator, and combustible refrigerant is circulated in the refrigerant loop；Leakage rate inferring portion, it infers to the speed that refrigerant is leaked from refrigerant loop；Refrigerant leakage detecting sensor, it is detected to the situation that refrigerant is leaked from refrigerant loop；Degradation portion, in the case where the refrigerant leakage rate being inferred to by leakage rate inferring portion reaches more than a reference value and refrigerant leakage is once all not detected by using refrigerant leakage detecting sensor, the degradation portion is judged as that the detection sensitivity of refrigerant leakage detecting sensor has been reduced；And communicating department, it circulates a notice of the purport in the case where detecting the reduction of detection sensitivity of refrigerant leakage detecting sensor using degradation portion.
Description
Technical field
The utility model is related to the refrigerating circulatory device used in refrigeration plant, Cryo Equipment and air-conditioning device etc., special
Be not be directed to use with combustible refrigerant refrigerating circulatory device be used for ensure the defencive function of security.
Background technology
As the refrigerating circulatory device using combustible refrigerant, for example, there is following technology in air-conditioning device：In order to
Prevent the refrigerant in living space when refrigerant is leaked from catching fire, possess the operating conditions such as the pressure based on refrigerant, temperature
Information and detect refrigerant leakage the presence or absence of refrigerant leakage detecting sensor (for example, referring to patent document 1).
Patent document 1：Japanese Unexamined Patent Publication 2007-263539 publications
Refrigerant leakage detecting sensor exists according to species causes detection sensitivity to drop because of the deterioration used throughout the year
Low sensor.If the air-conditioning device continuous running in the state of the detection sensitivity reduction of refrigerant leakage detecting sensor,
Then there is following problem：Detection can be caused to postpone regardless of whether producing refrigerant leakage, so that security can not be ensured.
Additionally, it is known that being caught fire because of caused by the leakage of combustible refrigerant with refrigerant leakage rate has compared with Important Relations.
In the small slow leakage of leakage rate, gas concentration is caused to become dilute due to gradually developing to the diffusion of the interior space
It is thin, so that indoor refrigerant concentration will not fall into ignition range.But, when substantial amounts of refrigerant is let out in a short time
When leakage is to interior, high refrigerant concentration region can be produced.Therefore, seek to consider the Security Countermeasures of refrigerant leakage rate.
Utility model content
The utility model be in view of this problem and complete, its object is to obtain a kind of refrigerating circulatory device, the system
SAPMAC method device is able to detect that and circulated a notice of the situation of the detection sensitivity reduction of refrigerant leakage detecting sensor, so as to
Reduce the situation that high refrigerant concentration region is produced because of the sensitivity decrease of refrigerant leakage detecting sensor.
Refrigerating circulatory device involved by the utility model possesses：Refrigerant loop, it possesses compressor, condenser, subtracted
Pressure device and evaporator, combustible refrigerant are circulated in the refrigerant loop；Leakage rate inferring portion, its to refrigerant from
The speed of refrigerant loop leakage is inferred；Refrigerant leakage detecting sensor, it is leaked from refrigerant loop refrigerant
Situation detected；Degradation portion, a reference value is reached in the refrigerant leakage rate being inferred to by leakage rate inferring portion
In the case of refrigerant leakage is once not detected by above and all using refrigerant leakage detecting sensor, the degradation portion
Being judged as the detection sensitivity of refrigerant leakage detecting sensor has reduced；And communicating department, it is utilizing the inspection of degradation portion
Circulate a notice of the purport in the case of the reduction for the detection sensitivity for measuring refrigerant leakage detecting sensor.
According to the utility model, the situation of the detection sensitivity reduction of refrigerant leakage detecting sensor is detected and circulates a notice of,
Therefore, it is possible to urge the replacing of refrigerant leakage detecting sensor, repair.As a result, can reduce because of refrigerant leak detection
The sensitivity decrease of sensor and produce high refrigerant concentration region, the unfavorable condition that refrigerant catches fire.
Brief description of the drawings
Fig. 1 is the figure of the refrigerant loop for the air-conditioning device for showing embodiment 1 of the present utility model.
Fig. 2 is the control block diagram of the control device of Fig. 1 air-conditioning device.
Fig. 3 is the refrigerant leakage detecting sensor deterioration inspection for the air-conditioning device for showing embodiment 1 of the present utility model
Survey the flow chart of the flow of processing.
Embodiment
Hereinafter, the structure to the air-conditioning device of an example as refrigerating circulatory device is illustrated.
Embodiment 1.
Fig. 1 is the figure of the refrigerant loop for the air-conditioning device for showing embodiment 1 of the present utility model.
The air-conditioning device of present embodiment 1 possess compressor 11, four-way valve 12, outdoor heat converter 13, by expansion valve etc.
Decompressor 14, cryogen vessel 15 and the indoor heat converter 21 of composition, and possess refrigerant loop, combustible refrigerant
Circulated in the refrigerant loop.Air-conditioning device is also equipped with outdoor draft fan 16, the Yi Jixiang blown to outdoor heat converter 13
The indoor blower 22 that indoor heat converter 21 is blown.
Moreover, being configured with compressor 11, four-way valve 12, outdoor heat converter 13, decompressor 14 and system in outdoor unit 1
Refrigerant container 15, indoors machine 2 be configured with indoor heat converter 21 and indoor blower 22.In addition, being also configured in outdoor unit 1
There is the discharge temperature sensor 17 detected to the temperature discharged from compressor 11.Machine 2 is also configured with to refrigerant indoors
The refrigerant leakage detecting sensor 23 that situation about being leaked from refrigerant loop is detected.In addition, except discharge temperature sensing
Outside device 17 and refrigerant leakage detecting sensor 23, it is also configured with air-conditioning device to the position everywhere of refrigerant loop
Multiple sensors that temperature, pressure are detected etc., the detection signal of the various sensors in air-conditioning device is input to
Control device 31 described later.
The concrete structure of refrigerant leakage detecting sensor 23 is not specially limited, and can use existing technology.Make
For refrigerant leakage detecting sensor 23, for example, it can use the technology described in patent document 1.I.e., it is possible to be configured to：Possess
The sensor that pressure, temperature to the refrigerant in refrigerant loop are detected, is based on when refrigerant leak detection is operated
The current refrigerant amount in refrigerant loop is calculated as the measured value obtained by each sensor is measured, and according to calculating
The refrigerant amount and the difference of original refrigerant amount that go out and the leakage for detecting refrigerant.As refrigerant leakage detecting sensor 23,
In addition for example can also be using the technology described in Japanese Unexamined Patent Publication 2002-5548 publications.I.e., it is possible to be configured to：Possess
The current detection sensor detected to compressor operation electric current, reaches according to the electric current detected by current detection sensor
Situation below a reference value and be judged as refrigerant and leak.As refrigerant leakage detecting sensor 23, in addition for example go back
Gas concentration sensor can be used.
If moreover, detecting the leakage of refrigerant using refrigerant leakage detecting sensor 23, it detects that signal is defeated
Enter to control device 31 described later, and display part 35 described later generate the display of the purport of refrigerant leakage.
The air-conditioning device constituted in the above described manner can carry out cooling operation by the switching of four-way valve 12 or heat
Operating.In the case of the solid lateral for switching to four-way valve 12 in Fig. 1, indoor heat converter 21 turns into evaporator and outdoor
Heat exchanger 13 turns into condenser and implements cooling operation, in the case where four-way valve 12 to be switched to the dotted line side in Fig. 1, room
Inside heat exchanger 21 turns into condenser and outdoor heat converter 13 turns into evaporator and implements heating operation.
In addition, air-conditioning device possesses：Outdoor unit control device 31a, it is integrally controlled to outdoor unit；And indoor set
Control device 31b, it is integrally controlled to indoor set.Indoor set control device 31b can with for independently to indoor set 2
The exchange of signal etc. is controlled between the remote control 34 operated and between outdoor unit control device 31a via biography
Defeated line (can also be wireless) is controlled the exchange of signal etc..Hereinafter, indoor set control device 31b and outdoor unit are controlled
Device 31a is illustrated collectively as control device 31.Control device 31 can be by realizing the circuit devcie of its function
Etc (device) hardware is constituted, additionally it is possible to held by the arithmetic unit of microcomputer or CPU etc and on these arithmetic units
Capable control program is constituted.
Remote control 34 possesses the display part 35 being made up of liquid crystal panel etc..Display part 35 carry out operation mode display,
Generate the display of purport of refrigerant leakage, the purport of the detection sensitivity reduction of refrigerant leakage detecting sensor 23 it is aobvious
Show.The situation of the detection sensitivity reduction of the display part 35 circular refrigerant leakage detecting sensor 23, equivalent to this practicality
Communicating department in new.As communicating department, in addition such as can also use loudspeaker.
(the control module structure of refrigerating air conditioning device)
Fig. 2 is the control block diagram of the control device of Fig. 1 air-conditioning device.
Control device 31 is compressed the drive of machine 11 based on the detection signal of the various sensors in air-conditioning device
Dynamic frequency control, aperture control of decompressor 14 etc..In addition, control device 31 possesses：Leakage rate inferring portion 32, it is to system
The speed that cryogen is leaked from refrigerant loop is inferred；And degradation portion 33, it is to refrigerant leakage detecting sensor
The situation of 23 detection sensitivity reduction is detected.Leakage rate inferring portion 32 and degradation portion 33 functionally by
CPU and control program are constituted.
Detection signal of the leakage rate inferring portion 32 based on the various sensors in air-conditioning device and refrigerant is let out
Leakage speed is inferred.The estimating method of the refrigerant leakage rate of leakage rate inferring portion 32 is not specially limited, can
Using existing technology.For example, using the technology disclosed in No. 4799563 publications of Japanese Patent, first, according to the pressure of refrigerant
The operating that power, the information of temperature and implementing repeatedly are detected to the refrigerant charge that is filled in refrigerant loop, and it is right
The refrigerant charge of each time is calculated.Then, the refrigerant charge of each time is removed each other using detection operating interval time
Difference, thus, it is possible to be inferred to refrigerant leakage rate.In addition, can also for example use Japanese Unexamined Patent Publication 2002-5548 publications
Disclosed in following method：As refrigerant leakage rate to the reduction of the compressor operation electric current during compressor operation
Speed is inferred.In addition, the testing result regardless of refrigerant leakage detecting sensor 23, leakage rate inferring portion 32 is all
Independently leakage rate is inferred.
Testing result and leakage rate inferring portion 32 of the degradation portion 33 based on refrigerant leakage detecting sensor 23
Inferred results and the situation to the reduction of the detection sensitivity of refrigerant leakage detecting sensor 23 is detected.Specifically,
The situation for judging detection sensitivity reduction is reached in the refrigerant leakage rate detected by leakage rate inferring portion 32
In the case of refrigerant leakage is once all not detected by more than a reference value and using refrigerant leakage detecting sensor 23, deterioration
Test section 33 is judged as that the detection sensitivity of refrigerant leakage detecting sensor 23 has been reduced.In refrigerant leakage detecting sensor
23 detection sensitivity reduction situation under, detected using refrigerant leakage detecting sensor 23 there occurs refrigerant leakage when
Actual refrigerant concentration be higher than should detect originally there occurs refrigerant leakage refrigerant concentration.
Next, action of the reference picture 1 to the kind of refrigeration cycle of air-conditioning device is illustrated.
(heating operation)
In heating operation, four-way valve 12 is switched to the state shown in the dotted line in Fig. 1.In air-conditioning device, in system
During heat run, by compressor 11 compress after refrigerant turn into the gas refrigerant of HTHP, the gas refrigerant is from four-way
Valve 12 by and be fed through indoor heat converter 21.Flow into the refrigerant of indoor heat converter 21 and by indoor blower 22
The room air of conveying carries out heat exchange and liquefied by radiating.Refrigerant after liquefaction is depressurized via cryogen vessel 15
Device 14 depressurizes and is formed as gas-liquid two-phase state.Refrigerant under gas-liquid two-phase state flows into outdoor heat converter 13, with
The outdoor air conveyed by outdoor draft fan 16 carries out heat exchange and gasified by heat absorption, and then is returned to compressor 11.System
Cryogen circulates in refrigerant loop and carries out heating operation in the above described manner.
(cooling operation)
In cooling operation, four-way valve 12 is switched to the state shown in solid in Fig. 1.In air-conditioning device, in system
During blowdown firing, by compressor 11 compress after refrigerant turn into the gas refrigerant of HTHP, the gas refrigerant is from four-way
Valve 12 by and be fed through outdoor heat converter 13.Flow into the refrigerant of outdoor heat converter 13 and by outdoor draft fan 16
The outdoor air of conveying carries out heat exchange and liquefied by radiating.Refrigerant after liquefaction is depressurized device 14 and depressurizes and formed
For gas-liquid two-phase state, and indoor heat converter 21 is flowed into via cryogen vessel 15.Flow into indoor heat converter 21
Refrigerant carry out heat exchange with the room air that is conveyed by indoor blower 22 and gasified by heat absorption, and then to compressor
11 return.Refrigerant circulates in refrigerant loop and carries out cooling operation in the above described manner.
Fig. 3 is the refrigerant leakage detecting sensor deterioration inspection for the air-conditioning device for showing embodiment 1 of the present utility model
Survey the flow chart of the flow of processing.Just perform Fig. 3's at the time of the degradation of refrigerant leakage detecting sensor is reached
Flow.Though in addition, do not illustrated in figure 3, air-conditioning device leaks inspection all the time or appropriate at the time of using refrigerant
Survey sensor 23 and check whether that generating refrigerant leaks.
If reach the degradation of refrigerant leakage detecting sensor 23, the leakage rate of air-conditioning device is inferred
Portion 32 carries out the deduction (S1) of refrigerant leakage rate.As long as leakage rate inferring portion 32 utilizes known skill as described above
Art carries out the deduction to refrigerant leakage rate.Inferred moreover, degradation portion 33 is checked by leakage rate inferring portion 32
Whether the refrigerant leakage rate gone out reaches more than a reference value and checks whether using refrigerant leakage detecting sensor 23 once
All it is not detected by the leakage (S2) of refrigerant.More than a reference value is reached in refrigerant leakage rate and leaks inspection using refrigerant
In the case that survey sensor 23 is once all not detected by refrigerant leakage, degradation portion 33 is judged as that refrigerant leak detection is passed
The detection sensitivity reduction of sensor 23.
Regulation control when control device 31 receives the judged result in degradation portion 33 and implements refrigerant leakage
(S3).That is, control device 31 shows the display part 35 of remote control 34 and circulates a notice of the purport of " transducer sensitivity reduction ".Not
It is confined to the display part 35 of remote control 34 as described above and carries out the circular, can be notified by voice, in addition, also may be used
So that the display part of the display part (not shown) of indoor set 2, outdoor unit 1 is (not shown) to carry out display circular.Pass through the circular, energy
The feelings of the sensitivity decrease of refrigerant leakage detecting sensor 23 are enough notified to user or attendant (service man)
Condition, so as to urge the replacing of refrigerant leakage detecting sensor 23, repair.
In addition, regulation control when being leaked as refrigerant, control device 31 makes indoor blower 22 within a certain period of time
The stirring of surrounding air is operated and carried out, thus prevents the refrigerant concentration of interior from falling into ignition range.In addition, this
Place, although be to be detected and not let out to refrigerant to the situation of the sensitivity decrease of refrigerant leakage detecting sensor 23
The situation of leakage is detected, but can not negate that over sight (OS) freezes because of the sensitivity decrease of refrigerant leakage detecting sensor 23 in itself
The possibility of agent leakage, therefore, what is carried out and generally carried out in refrigerant leak detection controls same control.
On the other hand, when the situation for the sensitivity decrease for being not detected by refrigerant leakage detecting sensor 23 in step s 2
When, terminate refrigerant leakage detecting sensor degradation processing.
As described above, according to present embodiment 1, the detection for detecting and circulating a notice of refrigerant leakage detecting sensor 23 is sensitive
Spend the situation of reduction.Therefore, it is possible to notify that the detection of refrigerant leakage detecting sensor 23 is sensitive to user or attendant
The situation of reduction is spent, so as to urge the replacing of refrigerant leakage detecting sensor 23, repair.As a result, can reduce because
The detection sensitivity of refrigerant leakage detecting sensor 23 reduces and produces high refrigerant concentration region, the possibility that refrigerant catches fire
Property.
In addition, the algorithm detected as the deterioration to refrigerant leakage detecting sensor 23, is pushed away by leakage rate
The refrigerant leakage rate that disconnected portion 32 is detected reaches more than a reference value of the reduction for judging detection sensitivity and utilizes system
In the case that cryogen leakage detecting sensor 23 is once all not detected by refrigerant leakage, it is determined as that refrigerant leak detection is sensed
The detection sensitivity of device 23 has been reduced.Therefore, it is possible to reduce the detection sensitivity reduction because of refrigerant leakage detecting sensor 23
And produce high refrigerant concentration region, the possibility that refrigerant catches fire.Due to letting out in the past and in the absence of detecting and circulating a notice of refrigerant
The viewpoint of the situation of the detection sensitivity reduction of leak detection sensor 23, therefore, the technology of present embodiment 1 is highly effective.
In addition, in present embodiment 1, at the time of on degradation, it is set to carry out all the time or appropriate at the time of
Degradation, but it is also possible to progress is cooperateed with refrigerant leak detection.That is, for example when manually operated or set based on planning chart
At the time of determining carry out refrigerant leak detection when, at the time of refrigerant leak detection can be followed closely after carry out degradation.
It is exemplified that refrigerant leakage detecting sensor 23 is arranged at indoor set in addition, in above-mentioned embodiment 1
The structure of side, but it is also possible to be arranged at outdoor pusher side and carry out the detection of the refrigerant leakage of outdoor pusher side, refrigerant leakage speed
The deduction of degree.
In addition, in above-mentioned embodiment 1, refrigerating circulatory device is illustrated for the situation of air-conditioning device, but
The cooling device cooled down to refrigerating warehouse etc. can be set to.
Description of reference numerals：
1 ... outdoor unit；2 ... indoor sets；11 ... compressors；12 ... four-way valves；13 ... outdoor heat converters；14 ... decompression dresses
Put；15 ... cryogen vessels；16 ... outdoor draft fans；17 ... discharge temperature sensors；21 ... indoor heat converters；22 ... is indoor
Pressure fan；23 ... refrigerant leakage detecting sensors；31 ... control devices；31a ... outdoor unit control devices；31b ... indoor sets
Control device；32 ... leakage rate inferring portion；33 ... degradation portions；34 ... remote controls；35 ... display parts.
Claims (2)
1. a kind of refrigerating circulatory device, it is characterised in that
The refrigerating circulatory device possesses：
Refrigerant loop, it possesses compressor, condenser, decompressor and evaporator, and combustible refrigerant is in the refrigerant
Circulated in loop；
Leakage rate inferring portion, it infers to the speed that refrigerant is leaked from the refrigerant loop；
Refrigerant leakage detecting sensor, it is detected to the situation that refrigerant is leaked from the refrigerant loop；
Degradation portion, the refrigerant leakage rate being inferred to by the leakage rate inferring portion reach more than a reference value and
In the case of being once all not detected by refrigerant leakage using the refrigerant leakage detecting sensor, the degradation portion judges
Detection sensitivity for the refrigerant leakage detecting sensor has been reduced；And
Communicating department, it is detecting the detection sensitivity of the refrigerant leakage detecting sensor using the degradation portion
Circulate a notice of this case in the case of reduction.
2. refrigerating circulatory device according to claim 1, it is characterised in that
The refrigerating circulatory device possesses indoor set, and the indoor set has to be played as the condenser or the evaporator
The indoor heat converter of function,
The refrigerant leakage detecting sensor is configured with the indoor set.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2015/079850 WO2017068686A1 (en) | 2015-10-22 | 2015-10-22 | Refrigeration cycle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206420200U true CN206420200U (en) | 2017-08-18 |
Family
ID=58556788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201590000691.3U Expired - Fee Related CN206420200U (en) | 2015-10-22 | 2015-10-22 | Refrigerating circulatory device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6381824B2 (en) |
| CN (1) | CN206420200U (en) |
| WO (1) | WO2017068686A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057027A (en) * | 2019-04-15 | 2019-07-26 | 青岛海尔空调器有限总公司 | The method, apparatus and computer storage medium of temperature and humidity adjustment monitoring of tools |
| CN111811175A (en) * | 2019-04-11 | 2020-10-23 | 开利公司 | Refrigerant leak sensor pre-trip inspection sequence and diagnosis |
| CN113007863A (en) * | 2021-02-19 | 2021-06-22 | 格力电器（合肥）有限公司 | Refrigerant leakage alarm sensor assembly, refrigeration equipment and alarm method |
| CN113994151A (en) * | 2019-06-14 | 2022-01-28 | 大金工业株式会社 | Refrigerant cycle device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019082242A1 (en) * | 2017-10-23 | 2019-05-02 | 三菱電機株式会社 | Environment monitoring system |
| WO2020115847A1 (en) * | 2018-12-05 | 2020-06-11 | 三菱電機株式会社 | Refrigeration cycle device |
| JP6978696B2 (en) | 2019-09-30 | 2021-12-08 | ダイキン工業株式会社 | Air conditioning ventilation system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3708405B2 (en) * | 2000-06-19 | 2005-10-19 | 三菱電機株式会社 | Home appliances using flammable refrigerants |
| JP5766006B2 (en) * | 2011-04-26 | 2015-08-19 | ホシザキ電機株式会社 | How to operate an ice machine |
| JP2014126253A (en) * | 2012-12-26 | 2014-07-07 | Noritz Corp | Heat pump device |
| JP2015094524A (en) * | 2013-11-12 | 2015-05-18 | ダイキン工業株式会社 | Indoor machine |
-
2015
- 2015-10-22 JP JP2017546342A patent/JP6381824B2/en active Active
- 2015-10-22 CN CN201590000691.3U patent/CN206420200U/en not_active Expired - Fee Related
- 2015-10-22 WO PCT/JP2015/079850 patent/WO2017068686A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811175A (en) * | 2019-04-11 | 2020-10-23 | 开利公司 | Refrigerant leak sensor pre-trip inspection sequence and diagnosis |
| CN110057027A (en) * | 2019-04-15 | 2019-07-26 | 青岛海尔空调器有限总公司 | The method, apparatus and computer storage medium of temperature and humidity adjustment monitoring of tools |
| CN113994151A (en) * | 2019-06-14 | 2022-01-28 | 大金工业株式会社 | Refrigerant cycle device |
| CN113007863A (en) * | 2021-02-19 | 2021-06-22 | 格力电器（合肥）有限公司 | Refrigerant leakage alarm sensor assembly, refrigeration equipment and alarm method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2017068686A1 (en) | 2017-12-28 |
| JP6381824B2 (en) | 2018-08-29 |
| WO2017068686A1 (en) | 2017-04-27 |
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Granted publication date: 20170818 Termination date: 20181022 |