CN108844267A - A kind of multiple pressure machine failure monitoring method, device and more press systems - Google Patents
A kind of multiple pressure machine failure monitoring method, device and more press systems Download PDFInfo
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- CN108844267A CN108844267A CN201810630379.2A CN201810630379A CN108844267A CN 108844267 A CN108844267 A CN 108844267A CN 201810630379 A CN201810630379 A CN 201810630379A CN 108844267 A CN108844267 A CN 108844267A
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- unbalanced fault
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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
- F25B49/022—Compressor control arrangements
-
- 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
- F25B31/00—Compressor arrangements
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Presses (AREA)
Abstract
The present invention discloses a kind of multiple pressure machine failure monitoring method, device and more press systems.Wherein, this method includes：Obtain the operating parameter of each press in more press systems；Wherein, more press systems are in symmetrical operation state；The operating parameter of more each press determines whether more press systems unbalanced fault occur according to comparison result.Through the invention, for the more press systems for being in symmetrical operation state, it can find recessive problem with the unbalanced fault of accurate judgement system, protect unit.In the failure that unbalanced fault occurs in system but does not cause other that can be identified by unit, avoiding unit from continuing to run may cause damage.
Description
Technical field
The present invention relates to more technical field of pressing machine, in particular to a kind of multiple pressure machine failure monitoring method, device and more
Press system.
Background technique
Currently, many heat exchange products (such as air-conditioning, refrigerator, refrigerator-freezer, water heater etc.) are to meet actual demand, using more
The design scheme of compressor.In a balanced system, when each compressor is transported in identical running environment with identical operation control amount
When row, feedback quantity can tend to be equal.(such as double-pressing machine is normal steady using setpoint frequency (amount of directly controlling of press is setpoint frequency)
When running surely, the press electric current of feedback is almost equal).
But the operating status of the load of some opened loop controls and process (or function) can not be assessed, for example, some is pressed
Contracting machine oil return is unsmooth；Some compressor oil return valve opens failure；System gas balanced valve opens failure；Pipeline where certain compressor
It runs unsmooth；Pipeline electric expansion valve or solenoid valve failure etc. where certain press.These problems are sentenced without effectively feedback
It is disconnected.When breaking down, press is run by force, is easily damaged unit.
Currently, in the balanced system of multiple pressure machine operation, can not certain abnormal bring asymmetric movements of identifying system draw
The operation exception risen.If the failure that the exception does not cause other that can be identified by unit, unit, which continues to run, may cause damage
It is bad.
Aiming at the problem that more press systems can not identify unbalanced fault, currently no effective solution has been proposed.
Summary of the invention
A kind of multiple pressure machine failure monitoring method, device and more press systems are provided in the embodiment of the present invention, to solve multiple pressure
Machine system can not identify the problem of unbalanced fault.
In order to solve the above technical problems, the present invention provides a kind of multiple pressure machine failure monitoring methods, wherein the method packet
It includes：Obtain the operating parameter of each press in more press systems；Wherein, more press systems are in symmetrical operation state；Than
The operating parameter of more each press determines whether more press systems unbalanced fault occur according to comparison result.
Further, the symmetrical operation state refer in more press systems each press identical running environment with
Identical operation control amount operation.
Further, the operating parameter of more each press determines whether more press systems go out according to comparison result
Now unbalanced fault includes：Judge whether the difference between the operating parameter of each press is in preset range；If so,
Then determine that more press systems do not occur unbalanced fault；If not and continue preset duration, it is determined that multiple pressure machine system
There is unbalanced fault in system.
Further, it is determined that after unbalanced fault occur in more press systems, the method also includes：Described in control
More press systems execute reply movement.
Further, more press systems are controlled and execute reply movement, including：It controls each in more press systems
A press is all shut down；Alternatively, one or more press in control more press systems are shut down；Wherein, one or
Multiple press are the press of the appearance unbalanced fault determined by comparing the operating parameter of each press.
Further, the one or more press controlled in more press systems are shut down, including：It step 1, will be described more
Each press number consecutively is 1,2 ... n in press system, and the operating parameter of each press is followed successively by：X1,X2……Xn；Step
Rapid 2, take the maximum Xmax minimum value Xmin in [X1, X2,, Xn], definitionTo judge whether two press the policy mappings of unbalanced fault occur；Its
In, a and b can take 1 two values arbitrarily different into n；Step 3, compareWithTo determine that feedback quantity is whether the corresponding press of Xmax or Xmin unbalanced fault occurs；Step 4, it controls
The press for producing existing unbalanced fault is shut down, and executes above-mentioned steps 1 to remaining press, and circulation above-mentioned steps 1-4 is not until
Occur the press of unbalanced fault again or whole press are shut down.
Further, more press systems are controlled and execute reply movement, including：Triggering alarm operation, controls institute later
It states more press systems and continues to run preset time period.
Further, more press systems are controlled and execute reply movement, including：Control the multiple pressure machine system reboot.
Further, the operating parameter includes at least following one：Running current, delivery temperature, press running frequency,
Press runs power.
The present invention also provides a kind of multiple pressure machine failure monitoring devices, wherein described device includes：Module is obtained, is used for
Obtain the operating parameter of each press in more press systems；Wherein, more press systems are in symmetrical operation state；Compare mould
Block determines whether more press systems asymmetric event occur according to comparison result for the operating parameter of more each press
Barrier.
Further, the comparison module, including：Judging unit, between the operating parameter for judging each press
Whether difference is in preset range；First processing units are the case where being for the judging result in the judging unit
Under, determine that more press systems do not occur unbalanced fault；The second processing unit, for the judgement knot in the judging unit
In the case that fruit is no and lasting preset duration, determine that unbalanced fault occur in more press systems.
Further, described device further includes：Module is coped with, for determining more asymmetric events of press system appearance
After barrier, controls more press systems and execute reply movement.
Further, the reply module includes：First control unit, it is each in more press systems for controlling
Press is all shut down；Alternatively, one or more press in control more press systems are shut down；Wherein, one or more
A press is the press of the appearance unbalanced fault determined by comparing the operating parameter of each press.
Further, the reply module includes：Second control unit, for determining more press system appearance not
After symmetric fault, triggering alarm operation controls more press systems later and continues to run preset time period.
Further, the reply module includes：Third control unit, for determining more press system appearance not
After symmetric fault, the multiple pressure machine system reboot is controlled.
Further, the operating parameter includes at least following one：Running current, delivery temperature, press running frequency,
Press runs power.
The present invention also provides a kind of more press systems, which is characterized in that more press systems include above-mentioned multiple pressure
Machine failure monitoring device.
It applies the technical scheme of the present invention, it, can be with accurate judgement system for the more press systems for being in symmetrical operation state
The unbalanced fault of system finds recessive problem, protects unit.There is unbalanced fault in system but does not cause other can be by unit
When the failure of identification, avoiding unit from continuing to run may cause damage.
Detailed description of the invention
Fig. 1 is the flow chart of multiple pressure machine failure monitoring method according to an embodiment of the present invention；
Fig. 2 is the unbalanced fault monitoring schematic diagram of more press systems according to an embodiment of the present invention；
Fig. 3 is the structural block diagram of multiple pressure machine failure monitoring device according to an embodiment of the present invention.
Specific embodiment
Present invention is further described in detail in the following with reference to the drawings and specific embodiments, it should be understood that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
In subsequent description, it is only using the suffix for indicating such as " module ", " component " or " unit " of element
Be conducive to explanation of the invention, itself there is no a specific meaning.Therefore, " module ", " component " or " unit " can mix
Ground uses.
Technical solution of the present invention is introduced below by embodiment.
Embodiment one
Fig. 1 is the flow chart of multiple pressure machine failure monitoring method according to an embodiment of the present invention, as shown in Figure 1, this method packet
Include following steps (step S101- step S102)：
Step S101 obtains the operating parameter of each press in more press systems；Wherein, more press systems are in symmetrical fortune
Row state；The symmetrical operation state refers to that each press is transported in identical running environment with identical operation control amount in more press systems
Row；
Step S102, the operating parameter of more each press determine whether more press systems occur not according to comparison result
Symmetric fault.
The present embodiment is directed to more press systems in symmetrical operation state, can be with the asymmetry event of accurate judgement system
Barrier finds recessive problem, protects unit.In the failure that system unbalanced fault occurs but do not cause other that can be identified by unit
When, avoiding unit from continuing to run may cause damage.
In the present embodiment, for the operating parameter of more each press, determine that more press systems are according to comparison result
It is no unbalanced fault occur, it can be realized by following preferred embodiment：Judge the difference between the operating parameter of each press
Whether value is in preset range；If it is, determining that more press systems do not occur unbalanced fault；If not and continue pre-
If duration (such as 1min), it is determined that unbalanced fault occur in more press systems.That is, if the operation of each press is joined
Number is all very close or equal, then it represents that more press system normal operations do not occur unbalanced fault.In addition to this, then it represents that
There is unbalanced fault in more press systems.
In a balanced system, when each compressor is when identical running environment is run with identical operation control amount, pass through
Compare each press operation feedback quantity (e.g., when the operation of compressor same frequency, the running current of press is equal under normal circumstances)
Operational process in difference, to determine whether more press systems are in asymmetric operation state.This asymmetric operation shape
State is often because following reason causes：Some compressor oil return is unsmooth, and load is caused to increase；Some compressor oil return valve is opened
Failure；System gas balanced valve opens failure；Check valve damage；Pipeline operation where certain compressor is unsmooth；Driving plate is abnormal；Certain
Pipeline electric expansion valve or solenoid valve failure etc. where press, due to being not closed-loop control, unit will not be discovered these exceptions, long
It is easy to cause unit to damage after time operation.
After determining that unbalanced fault occur in more press systems, controls more press systems and execute reply movement.Specifically,
The each press that can control in more press systems is all shut down；Alternatively, controlling one or more press in more press systems
It shuts down；Wherein, one or more press are the pressures of the appearance unbalanced fault determined by comparing the operating parameter of each press
Machine.In the operating parameter of more each press, it can determine one or more press of unbalanced fault occur, for example, having
The operating parameter of one press is obviously larger with the difference of the operating parameter of other press, then the press breaks down.Alternatively,
When other no association machine halt troubles occur, only gives a warning and notify user without shutting down；Alternatively, according to asymmetric serious
Situation, segmentation take measures.In unbalanced fault not up to default severity, only gives a warning, reached in unbalanced fault
When to default severity, then take shutdown measure.
Further, the one or more press controlled in more press systems are shut down, and following preferred reality can be passed through
The mode of applying is realized：
It step 1, is 1,2 ... n by press number consecutively each in more press systems, the operating parameter of each press is successively
For：X1,X2……Xn.
Step 2, the maximum Xmax minimum value Xmin in [X1, X2,, Xn], definition are takenTo judge whether two press unbalanced fault policy mappings occur；Upper
State value be 1 when, indicate press a and b there is unbalanced fault, above-mentioned value be 0 when, indicate press a and b symmetrical operation.Wherein,
A and b can take 1 two values arbitrarily different into n.
Step 3, compareWithTo determine that feedback quantity is the correspondence of Xmax or Xmin
Press whether there is unbalanced fault.
Step 4, the press that unbalanced fault occurs in control is shut down, and executes above-mentioned steps 1 to remaining press, in circulation
Step 1-4 is stated to shut down up to no longer there is the press of unbalanced fault or whole press.In addition to this it is possible to trigger alarm
Operation, controls more press systems later and continues to run preset time period.Because some failures will not in a short time make unit
It is influenced at obvious, therefore can continue to run and shut down again for a period of time, thus the normal fortune of the guarantee unit of maximum possible
Row.Multiple pressure machine system reboot can also be controlled, after restarting, failure generally can all be eliminated.And continue to monitor each press
Operating parameter, the operating parameter of more each press determine whether more press systems unbalanced fault occur according to comparison result.
It should be noted that operating parameter involved in the present embodiment at least may include following one：Running current, row
Temperature degree, press running frequency, press run power.It is, of course, also possible to include other operating parameters, as long as can determine it is not right
Claim failure, this is not limited by the present invention.For example, on the unit of a single system double-pressing machine parallel connection, when double-pressing machine with
When identical frequency is run, master control receives or the running current of two press of measurement, the difference of two compressor running currents is compared, if should
Continuous time of the difference greater than 2A is greater than 1min, then reports " system is asymmetric " failure.Failure shutdown is switched on again, failure before
It can restore.Play the role of notifying user, protects unit.
Fig. 2 is the unbalanced fault monitoring schematic diagram of more press systems according to an embodiment of the present invention, as shown in Fig. 2, more
Include multiple press in press system, certain strategy be based on to feedback quantity (i.e. operating parameter) in the process of running and is compared,
For example, being averaged after the operating parameter of multiple press being summed it up, which can be used as reference value, if each pressure
The operating parameter of machine and the difference of the reference value are respectively less than preset range, then more press systems do not occur unbalanced fault, conversely,
There is unbalanced fault.Later, primary election unbalanced fault can be determined whether according to comparing result, then execute reply movement.This
In embodiment, master control finds that such as each press running frequency difference is big, when the big exception of each press running current difference, takes phase
It should act.
Embodiment two
Corresponding to the multiple pressure machine failure monitoring method of Fig. 1 introduction, a kind of multiple pressure machine failure monitoring dress is present embodiments provided
It sets, the structural block diagram of multiple pressure machine failure monitoring device as shown in Figure 3, which includes：
Module 10 is obtained, for obtaining the operating parameter of each press in more press systems；Wherein, more press systems are in
Symmetrical operation state；
Comparison module 20 is connected to and obtains module 10, true according to comparison result for the operating parameter of more each press
Whether fixed more press systems there is unbalanced fault.
The present embodiment is directed to more press systems in symmetrical operation state, can be with the asymmetry event of accurate judgement system
Barrier finds recessive problem, protects unit.In the failure that system unbalanced fault occurs but do not cause other that can be identified by unit
When, avoiding unit from continuing to run may cause damage.
Above-mentioned comparison module may include：Judging unit, the difference between operating parameter for judging each press are
It is no to be in preset range；First processing units, for determining multiple pressure in the case where the judging result of judging unit, which is, is
Machine system does not occur unbalanced fault；The second processing unit, for the judging result in judging unit be it is no and persistently preset when
In the case where length, determine that unbalanced fault occur in more press systems.That is, if the operating parameter of each press all very
It is close or equal, then it represents that more press system normal operations do not occur unbalanced fault.In addition to this, then it represents that multiple pressure machine system
There is unbalanced fault in system.
Above-mentioned apparatus can also include：Module is coped with, for controlling after determining that unbalanced fault occur in more press systems
It makes more press systems and executes reply movement.Specifically, reply module includes：First control unit, for controlling more press systems
In each press all shut down；Alternatively, the one or more press controlled in more press systems are shut down；Wherein, one or more
A press is the press of the appearance unbalanced fault determined by comparing the operating parameter of each press.Second control unit is used
In after determining that unbalanced fault occur in more press systems, triggering alarm operation controls more press systems later and continues to run
Preset time period.Third control unit, for controlling more press systems after determining that unbalanced fault occur in more press systems
Restart.
It should be noted that operating parameter involved in the present embodiment at least may include following one：Running current, row
Temperature degree, press running frequency, press run power.It is, of course, also possible to include other operating parameters, as long as can determine it is not right
Claim failure, this is not limited by the present invention.
The present embodiment also protects a kind of more press systems, the multiple pressure machine failure monitoring dress including above-described embodiment introduction
It sets.
From the above description it is found that the present invention mainly protects following technical scheme：In a balanced system, when each
Compressor runs feedback quantity by comparison press and (e.g., works as compressor when identical running environment is run with identical operation control amount
Same frequency run when, the running current of press is equal under normal circumstances) operational process in difference, to determine whether unit is located
In asymmetric operation state.When finding this abnormal, corresponding actions are taken.To find recessive problem, unit is protected.It is being
When system unbalanced fault occurs but do not cause other can be by the failure of unit identification, avoiding unit from continuing to run may cause damage
It is bad.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a mobile terminal (can be mobile phone, computer, clothes
Business device, air conditioner or the network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described above in conjunction with figure, but the invention is not limited to above-mentioned specific realities
Mode is applied, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art exist
Under enlightenment of the invention, without breaking away from the scope protected by the purposes and claims of the present invention, many shapes can be also made
Formula, all of these belong to the protection of the present invention.
Claims (17)
1. a kind of multiple pressure machine failure monitoring method, which is characterized in that the method includes：
Obtain the operating parameter of each press in more press systems；Wherein, more press systems are in symmetrical operation state；
The operating parameter of more each press determines whether more press systems unbalanced fault occur according to comparison result.
2. the method according to claim 1, wherein
The symmetrical operation state refers to that each press is controlled in identical running environment with identical operation in more press systems
Amount operation.
3. the method according to claim 1, wherein the operating parameter of more each press, according to comparison result
Determine whether more press systems unbalanced fault occur and include：
Judge whether the difference between the operating parameter of each press is in preset range；
If it is, determining that more press systems do not occur unbalanced fault；
If not and continue preset duration, it is determined that unbalanced fault occur in more press systems.
4. according to the method described in claim 3, it is characterized in that, determine more press systems occur unbalanced fault it
Afterwards, the method also includes：
It controls more press systems and executes reply movement.
5. according to the method described in claim 4, it is characterized in that, the control more press systems execute replies movement, including：
The each press controlled in more press systems is all shut down；Alternatively,
The one or more press controlled in more press systems are shut down；Wherein, one or more of press are to pass through ratio
The press for the appearance unbalanced fault that the operating parameter of more each press determines.
6. according to the method described in claim 5, it is characterized in that, controlling one or more press in more press systems
It shuts down, including：
It step 1, is 1,2 by press number consecutively each in more press systems,, n, the operating parameter of each press is successively
For：X1,X2,,,Xn；
Step 2, the maximum Xmax minimum value Xmin in [X1, X2,, Xn], definition are takenTo judge whether two press the policy mappings of unbalanced fault occur；Its
In, a and b can take 1 two values arbitrarily different into n；
Step 3, compareWithTo determine that feedback quantity is the corresponding pressure of Xmax or Xmin
Whether machine there is unbalanced fault；
Step 4, the press that unbalanced fault occurs in control is shut down, and executes above-mentioned steps 1 to remaining press, recycles above-mentioned step
Rapid 1-4 is shut down up to no longer there is the press of unbalanced fault or whole press.
7. according to the method described in claim 4, it is characterized in that, the control more press systems execute replies movement, including：
Triggering alarm operation, controls more press systems later and continues to run preset time period.
8. according to the method described in claim 4, it is characterized in that, the control more press systems execute replies movement, including：
Control the multiple pressure machine system reboot.
9. method according to any one of claim 1 to 8, which is characterized in that the operating parameter includes at least following
One of：
Running current, delivery temperature, press running frequency, press run power.
10. a kind of multiple pressure machine failure monitoring device, which is characterized in that described device includes：
Module is obtained, for obtaining the operating parameter of each press in more press systems；Wherein, more press systems be in pair
Claim operating status；
Comparison module determines whether more press systems go out according to comparison result for the operating parameter of more each press
Existing unbalanced fault.
11. device according to claim 10, which is characterized in that the comparison module, including：
Whether judging unit, the difference between operating parameter for judging each press are in preset range；
First processing units, for determining more press systems in the case where the judging result of the judging unit, which is, is
Do not occur unbalanced fault；
The second processing unit, for determining in the case where the judging result of the judging unit is no and lasting preset duration
There is unbalanced fault in more press systems.
12. device according to claim 11, which is characterized in that described device further includes：
Module is coped with, is held for after determining that unbalanced fault occur in more press systems, controlling more press systems
Row reply movement.
13. device according to claim 12, which is characterized in that the reply module includes：
First control unit is all shut down for controlling each press in more press systems；Alternatively, controlling the multiple pressure
One or more press in machine system are shut down；Wherein, one or more of press are the operations by comparing each press
The press for the appearance unbalanced fault that parameter determines.
14. device according to claim 12, which is characterized in that the reply module includes：
Second control unit, for after determining that unbalanced fault occur in more press systems, triggering alarm to be operated, later
It controls more press systems and continues to run preset time period.
15. device according to claim 12, which is characterized in that the reply module includes：
Third control unit, for controlling multiple pressure machine system after determining that unbalanced fault occur in more press systems
System is restarted.
16. device described in any one of 0 to 15 according to claim 1, which is characterized in that the operating parameter include at least with
It is one of lower：Running current, delivery temperature, press running frequency, press run power.
17. a kind of more press systems, which is characterized in that more press systems include described in any one of claim 10 to 16
Multiple pressure machine failure monitoring device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669967A (en) * | 2021-07-29 | 2021-11-19 | 广东芬尼克兹节能设备有限公司 | Control method, system, medium and heat pump for pre-judging leakage of heat pump refrigerant in advance |
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| CN113669967A (en) * | 2021-07-29 | 2021-11-19 | 广东芬尼克兹节能设备有限公司 | Control method, system, medium and heat pump for pre-judging leakage of heat pump refrigerant in advance |
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