CN107525211A - The fault detect of air-conditioning and its supercooling tube group and processing method - Google Patents
The fault detect of air-conditioning and its supercooling tube group and processing method Download PDFInfo
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- CN107525211A CN107525211A CN201710582027.XA CN201710582027A CN107525211A CN 107525211 A CN107525211 A CN 107525211A CN 201710582027 A CN201710582027 A CN 201710582027A CN 107525211 A CN107525211 A CN 107525211A
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/54—Heating and cooling, simultaneously or alternatively
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a kind of fault detect of air-conditioning super-cooled pipe group and processing method, method of the invention, during air-conditioning heating, judges whether be less than the first preset time the time required to delivery temperature is stable.It is less than the first preset time the time required to if delivery temperature is stable, then can determine that check valve breaks down substantially.In order to further determine that check valve breaks down, master control set also calculates the delivery temperature of stable state and the difference of indoor set heat exchanger coil temperature, and by above-mentioned difference compared with the first preset temperature difference.When delivery temperature and the difference of coil temperature are less than the first preset temperature difference, it may be determined that check valve breaks down.The method of the present invention is by detecting the delivery temperature of compressor exhaust temperature stabilization time and stable state and the difference of indoor set heat exchanger coil temperature, it can accurately determine whether the check valve in supercooling tube group breaks down, in order to timely processing failure, prevent one-way valve fault from influenceing the heating effect of air-conditioning.
Description
Technical field
The present invention relates to field of air conditioning, fault detect and the processing method of more particularly to a kind of air-conditioning and its supercooling tube group.
Background technology
During heat pump air conditioner use, the check valve in supercooling tube group breaks down sometimes, it is impossible to normal work, specifically
Referring to the valve element of check valve can not reset, and refrigerant opening is unable to normally closed.So as to cause the pair in heating in supercooling tube group
Capillary does not have throttling action, hinders refrigerant and carries out heat exchange, has had a strong impact on the heating effect of air-conditioning, greatly reduced
Consumer's Experience effect.
The failure typically occurs in new air conditioner mostly because in supercooling tube group part break-in also insufficient, meeting
There is valve element to get stuck the phenomenon that can not be resetted, be fully not in the problem substantially with old break-in.This failure is by extreme influence
Air-conditioning heating performance, therefore detect in time particularly significant.If the failure is handled aptly supercooling tube group can be made to recover normal,
If this failure does not find and repaired in time, check valve permanent damages are may result in.Further, since the failure has no effect on air-conditioning
Operating, while the frequency of occurrences is relatively low, therefore be not easy to find, but the failure influences heat pump performance really again, influences heating effect
And Consumer's Experience, therefore how to detect early and try solve problems it is most important.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State the air-conditioning of problem and its fault detect and the processing method of supercooling tube group.
It is an object of the invention in order to detect the failure of supercooling tube group.
Another object of the present invention is to repair the failure of supercooling tube group.
On the one hand, the invention provides a kind of fault detect of air-conditioning super-cooled pipe group and processing method, including：Air-conditioning is opened
Heating；Record since heating to the stable required time of delivery temperature of compressor；Judge it is stable the time required to whether be less than the
One preset time；If so, the coil temperature of delivery temperature and heat exchanger for air-conditioner indoor machine of the detection in stable state；Judge
It is poor whether the difference of delivery temperature and coil temperature in stable state is less than the first preset temperature；And if so, determined
Cold Guan Zuzhong check valve breaks down.
Alternatively, it is determined that also including after the step of check valve of supercooling tube group breaks down：Air-conditioning is converted to first
Refrigerating state, then it is again converted to heating state；After the delivery temperature of machine to be compressed is stable, delivery temperature and disk are detected again
Pipe temperature；It is poor whether the difference of delivery temperature and coil temperature of the judgement in stable state is less than the first preset temperature；If so,
Control air-conditioning shuts down breath of concurrently delivering letters, and prompts the user with check valve damage；And if it is not, control air-conditioning continues to heat.
Alternatively, record includes since heating to the step of delivery temperature stabilization required time of compressor：From air-conditioning
Heating starts, and the delivery temperature of first compression machine is detected at interval of predetermined amount of time；Calculate the difference of adjacent delivery temperature twice；
Judge whether the difference of the last delivery temperature detected twice is less than the second preset temperature difference；If, it is determined that exhaust temperature
Degree stabilization, the time difference since the delivery temperature for detecting compressor heating to last time before delivery temperature stabilization is calculated to make
For the stable required time of delivery temperature.
Alternatively, the step of detecting the delivery temperature in stable state includes：By the stable preceding last time of delivery temperature
The delivery temperature of the compressor detected is as the delivery temperature in stable state.
Alternatively, air-conditioning is converted to refrigerating state first, and the step of being then again converted to heating state includes：Air-conditioning stops
After the preset time of machine second, refrigerating state is converted to；The second preset time is shut down after air-conditioner continuous the 3rd preset time of refrigeration, so
After be again converted to heating state.
On the other hand, present invention also offers a kind of air-conditioning, including：Changed by compressor, outdoor unit heat exchanger and indoor set
Hot device is sequentially connected the coolant circulating system to be formed；Supercooling tube group, the downstream of outdoor unit heat exchanger refrigerant flow is arranged at, be subcooled
Pipe group includes：Main capillary, its one end lead to outdoor unit heat exchanger, and the other end connects one end of check valve；Secondary capillary, it is in parallel
In the both ends of check valve；And check valve, it is configured to only allow refrigerant unidirectional from outdoor unit heat exchanger to indoor set heat exchanger direction
Circulation；Time set, record is configured to since air-conditioning heating to the stable required time of delivery temperature of compressor；Delivery temperature
Detection means, it is configured to the delivery temperature of compressor of the detection in stable state；Coil temperature detection means, it is configured to detect
The coil temperature of indoor set heat exchanger；And master control set, when being configured to default less than first the time required to delivery temperature is stable
Between and the delivery temperature in stable state and the difference of coil temperature when being less than the first preset temperature difference, determine check valve
Failure.
Alternatively, master control set, it is configured to after it is determined that the check valve of supercooling tube group breaks down, control air-conditioning is first
Refrigerating state is converted to, is then again converted to heating state；Exhaust temperature detection means, it is configured to detect again in steady
Determine the delivery temperature of state；Coil temperature detection means, it is configured to detect coil temperature again；Master control set, it is configured to
In the case where the delivery temperature in stable state and the difference of coil temperature are less than the first preset temperature difference, control air-conditioning stops
Machine is concurrently delivered letters breath, prompts the user with check valve damage；And in the case where difference is more than the first preset temperature difference, control is empty
Tune continues to heat.
Alternatively, exhaust temperature detection means, it is configured to since air-conditioning heating, at interval of predetermined amount of time detection one
The delivery temperature of second compression machine；Master control set, it is configured to calculate the difference of adjacent delivery temperature twice；Detected twice finally
In the case that whether the difference of the delivery temperature arrived is less than the second preset temperature difference, determine that delivery temperature is stable；Time set,
Be configured to calculate since heating to delivery temperature delivery temperature of last time detection compressor before stable time difference with
As the stable required time of delivery temperature.
Alternatively, exhaust temperature detection means, it is configured to the delivery temperature compression that last time detects before stable
The delivery temperature of machine is as the delivery temperature in stable state.
Alternatively, master control set, it is configured to after it is determined that the check valve of supercooling tube group breaks down, control air-conditioning is shut down
After second preset time, refrigerating state is converted to；The second preset time is shut down after control air-conditioner continuous the 3rd preset time of refrigeration,
Then it is again converted to heating state.
The method of the present invention, during air-conditioning heating, judge whether be less than first the time required to delivery temperature is stable
Preset time.When heating state supercooling tube group check valve breaks down, the opening of valve body can not be closed normally, supercooling tube group
Secondary capillary can not play throttling action, cause cold medium flux excessive, and delivery temperature being capable of fast and stable.Therefore, if exhaust temperature
The first preset time is less than the time required to degree is stable, then can determine that check valve breaks down substantially.In order to further true
Determine check valve to break down, master control set also calculates the delivery temperature of stable state and the difference of indoor set heat exchanger coil temperature
Value, and by above-mentioned difference compared with the first preset temperature difference.If check valve breaks down, secondary capillary can not play throttling
Effect, the delivery temperature of compressor are much smaller than level when normally heating, and can cause the delivery temperature and indoor set disk of compressor
Pipe temperature is sufficiently close to.Therefore, when delivery temperature and the difference of coil temperature are less than the first preset temperature difference, it may be determined that single
Broken down to valve.The method of the present invention is by detecting the delivery temperature of compressor exhaust temperature stabilization time and stable state
Judge whether check valve breaks down with the difference of indoor set heat exchanger coil temperature, detection process is simple and convenient, without tearing machine open
It can determine that whether the check valve in supercooling tube group breaks down.The method of the present invention is advantageous to find in time and handling failure,
Prevent one-way valve fault from influenceing the heating effect of air-conditioning.
Further, method of the invention also includes the processing to one-way valve fault.It is determined that the check valve of supercooling tube group
Air-conditioning is converted to refrigerating state first after breaking down, and is then again converted to heating state.It is cold after refrigerating state is entered
Matchmaker flows to second port by the first port of check valve, and refrigerant applies an impulsive force to check valve can make the valve element of dislocation have one
Determine probability recovery.The method for recovering to perform above-mentioned fault detect after heating again.That is exhaust temperature detection means are again at detection
In the delivery temperature of stable state；Coil temperature detection means detects coil temperature again.If above-mentioned difference is pre- still less than first
If temperature difference, then prove that the valve element of check valve does not restore, now control air-conditioning to shut down and prompt the damage of user's check valve, it is necessary to more
Change.If above-mentioned difference is more than, the first preset temperature is poor, proves that the valve element of check valve restores, recovers normal, then air-conditioning can be just
Often heating.The method of the present invention is it is determined that the check valve of supercooling tube group breaks down when utilizing air conditioner refrigerating afterwards, and refrigerant is to list
Cause valve core reset to the impulsive force of valve core so that check valve recovers normal.
According to the accompanying drawings will be brighter to the detailed description of the specific embodiment of the invention, those skilled in the art
Above-mentioned and other purposes, the advantages and features of the present invention.
Brief description of the drawings
Some specific embodiments of the present invention are described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is the schematic diagram of air-conditioning according to an embodiment of the invention；
The schematic diagram of refrigerant pipe group when Fig. 2 is air conditioner refrigerating according to an embodiment of the invention；
The schematic diagram of refrigerant pipe group when Fig. 3 is air-conditioning heating according to an embodiment of the invention；
Fig. 4 is fault detect and the schematic diagram of processing method of air-conditioning super-cooled pipe group according to an embodiment of the invention；
Fig. 5 is the flow chart of the fault detect and processing method of empty supercooling tube group in accordance with another embodiment of the present invention.
Embodiment
The embodiment of the present invention provide firstly a kind of air-conditioning, including：By compressor 100, outdoor unit heat exchanger 200 and interior
Machine heat exchanger 300 is sequentially connected the coolant circulating system to be formed.Supercooling tube group 400 is arranged at the refrigerant stream of outdoor unit heat exchanger 200
The downstream on road, above-mentioned " downstream " refer to that under the normal refrigerating state of air-conditioning supercooling tube group 400 directly or indirectly connects outdoor unit
At the refrigerant exit of heat exchanger 200.Refrigerant flows through compressor 100, outdoor unit heat exchanger 200, supercooling successively under refrigerating state
Pipe group 400 and indoor set heat exchanger 300 circulate, under heating state, refrigerant opposite direction recycle stream by compressor 100
It is dynamic.Supercooling tube group 400 includes：Main capillary 410, secondary capillary 420 and check valve 430.
Main one end of capillary 410 leads to indoor set heat exchanger 200, and the other end connects one end of check valve 430.Secondary capillary
420 are parallel to the both ends of check valve 430.Check valve 430 only allows refrigerant from outdoor unit heat exchanger 200 to indoor set heat exchanger
300 direction one-way flows.Specifically, check valve 430 has first port 433 and second port 434, and first port 433 connects
Main capillary 410, second port 434 lead to outdoor unit heat exchanger 200.Above-mentioned check valve 430 includes：Valve body 431, valve element 432
And spring.Valve element 432 is arranged at the chamber interior of valve body 431, and chamber interior also has the opening 435 of cooling matchmaker circulation, valve element
432 can move along the bearing of trend of chamber, when refrigerant flows to first port 433 by second port 434, valve element 432 by
The percussion of refrigerant is moved towards first port 433, and opening 435 remains on, it is allowed to which refrigerant circulates；When refrigerant is by first
When port 433 flows to second port 434, valve element 432 is prevented refrigerant from circulating by the percussion occlusion of openings 435 of refrigerant.Bullet
Spring is used to provide the restoring force moved towards the direction of opening 435 to valve element 432, to cause valve element 432 when not acted on by refrigerant,
Return to the position of occlusion of openings 435.In other embodiment of the present invention, check valve 430 can also not include spring,
It is exactly that check valve 430 only includes valve body 431, valve element 432.The impulsive force of refrigerant is restored when valve element 432 fully relies on heating.
The normal work principle of the supercooling tube group 400 of the present embodiment is：In air conditioner refrigerating, as shown in figure 1, refrigerant is by
Two-port netwerk 434 flows to first port 433, and check valve 430 turns on, and refrigerant enters main capillary 410 by check valve 430, therefore secondary
Capillary 420 cuts little ice.In air-conditioning heating, as shown in Fig. 2 refrigerant flows to second port by first port 433
434, check valve 430 is closed, and refrigerant is forced into secondary capillary 420, and secondary capillary 420 plays throttling action.However, some
In the case of (such as the problems such as spring failure or making precision shortcoming due to valve element 432, causes the valve element of check valve 430
432 could not normal reset), it may appear that in air-conditioning heating, the valve element 432 of check valve 430 is led completely plugged opening 435
Refrigeration matchmaker is circulated by check valve 430, so as to which secondary capillary 420 does not have any effect.If secondary capillary 420 can not play section
Stream acts on, and the resistance of refrigerant circulation diminishes, and the delivery temperature of compressor 100 can be rapidly achieved stable state, delivery temperature with
The difference of indoor set coil temperature can be much smaller, causes heating efficiency drastically to decline.And the air-conditioning of the present embodiment can detect in time
It has the failure of check valve 430 in above-mentioned supercooling tube group 400, to prevent the failure of check valve 430 from being adversely affected to heating effect.
The air-conditioning of the present embodiment also includes：Time set 110, exhaust temperature detection means 120, coil temperature detection means
310 and master control set 500.It is stable that time set 110 is configured to delivery temperature of the record to compressor 100 since air-conditioning heating
Required time, above-mentioned time set 110 can be clock built in timer or air-conditioning etc..Exhaust temperature detection means 120 are matched somebody with somebody
The delivery temperature of compressor 100 of the detection in stable state is set to, above-mentioned exhaust temperature detection means 120 can be to be arranged at
The temperature sensor of the exhaust outlet of compressor 100.Coil temperature detection means 310 is configured to detect the disk of indoor set heat exchanger 300
Pipe temperature, coil temperature detection means 310 can be to be arranged at the temperature sensor of the coil surface of indoor set heat exchanger 300.It is main
Control device 500 is configured to when the difference of delivery temperature and the coil temperature of heat exchanger for air-conditioner indoor machine 300 is less than the first default temperature
When spending poor, determine that check valve 430 breaks down.
When air-conditioning has just started heating, refrigerant circulation needs a period of time stable, therefore the delivery temperature of compressor 100
Consecutive variations in a period of time of heating can just have been started in air-conditioning, then can just have been tended towards stability.In the present embodiment, delivery temperature
Detection means 120 detects the delivery temperature of first compression machine 100 at interval of predetermined amount of time since air-conditioning heating, such as often
Every 1s detections once, an outlet air temperature is obtained.With the increase of heating time, exhaust temperature detection means 120 can detect
To one group of temperature value with time consecutive variations.Above-mentioned multiple temperature values are also sent to master control by exhaust temperature detection means 120
Device 500, master control set 500 carry out a step processing to data.
Above-mentioned master control set 500 can be the computer board of air-conditioning.Master control set 500 is configured to calculate adjacent to be vented twice
The difference of temperature；In the case where the difference of the delivery temperature finally detected twice is less than the second preset temperature difference, it is determined that
Delivery temperature is stable.When exhaust temperature detection means 120 detect new delivery temperature, master control set 500 calculates finally
The difference for the delivery temperature that (or newest twice) detects twice, if to be less than the second preset temperature poor for said temperature difference,
Prove that delivery temperature tends towards stability, above-mentioned second preset temperature difference may be configured as 1 DEG C.The row detected for the last time before stabilization
Temperature degree can be used as delivery temperature during stable state.Time set 110 calculate since heating to delivery temperature it is stable before
The time difference of last time detection delivery temperature is to be used as the stable required time of delivery temperature.
Master control set 500 first determines whether be less than the first preset time the time required to delivery temperature is stable.In heating shape
When the check valve 430 of state supercooling tube group 400 breaks down, the opening 435 of valve body 431 can not be closed normally, the pair of supercooling tube group 400
Capillary 420 can not play throttling action, cause cold medium flux excessive, and delivery temperature being capable of fast and stable.Therefore, if exhaust temperature
The first preset time is less than the time required to degree is stable, then can determine that check valve 430 breaks down substantially.In order to further
Determine that check valve 430 breaks down, master control set 500 also calculates the delivery temperature and the disk of indoor set heat exchanger 300 of stable state
The difference of pipe temperature, and by above-mentioned difference compared with the first preset temperature difference.If check valve 430 breaks down, secondary capillary
Pipe 420 can not play throttling action, the level when delivery temperature of compressor 100 is much smaller than normal heating, can cause compressor
100 delivery temperature and indoor set coil temperature is sufficiently close to.Therefore, when delivery temperature and the difference of coil temperature are less than first
During preset temperature difference, it may be determined that check valve 430 breaks down.
The air-conditioning of the present embodiment can also further carry out troubleshooting after the failure of above-mentioned check valve 430 is detected,
To repair check valve 430 in time.Master control set 500 is after it is determined that the check valve 430 of supercooling tube group 400 breaks down, control
Air-conditioning is converted to refrigerating state first, is then again converted to heating state.Specifically, master control set 500 controls air-conditioning to shut down
After second preset time, refrigerating state is converted to；The second preset time is shut down after control air-conditioner continuous the 3rd preset time of refrigeration,
Then it is again converted to heating state.In the present embodiment, above-mentioned second preset time can be 1min, and the 3rd preset time can
Think 2min.
The failure of above-mentioned check valve 430 is due to that spring distortion is stuck or because the making precision of valve element 432 is owed mostly
Lack, the valve element 432 of check valve 430 can not be caused by normal reset closing opening 435.In the present embodiment, detected in master control borad
To after failure, the second preset time is first shut down, then controls four-way valve to commutate, air-conditioning is entered refrigerating state.Entering the shape that freezes
After state, refrigerant flows to second port 434 by first port 433, and refrigerant applies an impulsive force to check valve 430 can make dislocation
Valve element 432 has certain probability to restore.
The second preset time is shut down after the 3rd preset time of freezing, is then again converted to heating state.Due to air-conditioning
Heating state should not be converted directly into by refrigerating state, in order to prevent that air-conditioning is caused to damage, it is necessary to shut down after refrigeration
Start to heat again after second preset time.Again after heating, the method that performs above-mentioned fault detect again.I.e. delivery temperature detects
Device 120 detects the delivery temperature in stable state again；Coil temperature detection means 310 detects coil temperature again.It is main
Device 500 is controlled in the case where delivery temperature and the difference of coil temperature are less than the first preset temperature difference, control air-conditioning is shut down simultaneously
Information is sent, check valve 430 is prompted the user with and damages.If above-mentioned difference is poor still less than the first preset temperature, check valve is proved
430 valve element 432 does not restore, now controls air-conditioning to shut down and prompt user's check valve 430 to damage, it is necessary to change.Above-mentioned prompting
Information can be shown by air-conditioning panel.If it is poor that above-mentioned difference is more than the first preset temperature, the valve of check valve 430 is proved
Core 432 restores, and recovers normal, then air-conditioning can be heated normally.
Present invention also offers a kind of fault detect of air-conditioning super-cooled pipe group 400 and processing method.Fig. 4 is according to the present invention
The fault detect of air-conditioning super-cooled pipe group 400 of one embodiment and the schematic diagram of processing method.The detection method one of the present embodiment
As property may comprise steps of：
Step S402, air-conditioning open heating.During air-conditioning heating, refrigerant by flowing through compressor 100, indoor set heat exchanger successively
300th, supercooling tube group 400 and outdoor unit heat exchanger 200.
Step S404, record since heating to the stable required time of delivery temperature of compressor 100.Just start in air-conditioning
During heating, refrigerant circulation needs a period of time stable, therefore the delivery temperature of compressor 100 also can just start heating in air-conditioning
Consecutive variations in a period of time, then it can just tend towards stability.
Step S406, judge whether be less than the first preset time the time required to aforementioned stable.In heating state supercooling tube group
When 400 check valves 430 break down, the opening 435 of valve body 431 can not be closed normally, the secondary capillary 420 of supercooling tube group 400
Throttling action can not be played, causes cold medium flux excessive, delivery temperature being capable of fast and stable.
Step S408, if step S406 judged result is yes, delivery temperature of the detection in stable state.If exhaust temperature
The first preset time is less than the time required to degree is stable, then can determine that check valve 430 breaks down substantially.In order to further
Determine that check valve 430 breaks down, master control set 500 also calculates the delivery temperature and the disk of indoor set heat exchanger 300 of stable state
The difference of pipe temperature, and by above-mentioned difference compared with the first preset temperature difference.
Step S410, if step S406 judged result is no, check valve 430 does not break down, and air-conditioning continues just
Often heating.
Step S412, judges whether the difference of the coil temperature of delivery temperature and heat exchanger for air-conditioner indoor machine 300 is less than the
One preset temperature is poor.The delivery temperature of stable state and the difference of the coil temperature of indoor set heat exchanger 300 are calculated, and by above-mentioned difference
Value is compared with the first preset temperature difference.
Step S414, if step S412 judged result is yes, determine that event occurs for the check valve 430 in supercooling tube group 400
Barrier.If check valve 430 breaks down, secondary capillary 420 can not play throttling action, and the delivery temperature of compressor 100 is much smaller than
Level during normal heating, delivery temperature and indoor set coil temperature when compressor 100 can be caused stable are sufficiently close to.Cause
This, when the difference of delivery temperature and coil temperature when stablizing is less than the first preset temperature difference, it may be determined that check valve 430 is sent out
Raw failure.
Fig. 5 is fault detect and the flow of processing method of air-conditioning super-cooled pipe group 400 according to an embodiment of the invention
Figure, the control method perform following steps successively：
Step S502, since air-conditioning heating, the delivery temperature of first compression machine 100 is detected at interval of predetermined amount of time.
Since air-conditioning heating, the delivery temperature of first compression machine 100 is detected at interval of predetermined amount of time, such as one is detected every 1s
It is secondary, obtain an outlet air temperature.With the increase of heating time, one group of temperature value with time consecutive variations can be detected.
Step S504, calculate the difference of adjacent delivery temperature twice.When each detection means detects new delivery temperature,
Calculate the difference of the last adjacent delivery temperature detected twice.
Step S506, judges whether the difference of the last delivery temperature detected twice is less than the second preset temperature difference.
Step S508, if step S506 judged result is yes, determines that delivery temperature is stable, calculate since heating to row
The time difference of delivery temperature is detected before gas temperature stabilization for the last time as the stable required time of delivery temperature.If said temperature
Difference is less than the second default value, then proves that delivery temperature tends towards stability, above-mentioned second preset temperature difference may be configured as 1 DEG C.
Calculating detects the time difference of delivery temperature to be used as delivery temperature stable for the last time since heating to delivery temperature before stable
Required time.If step S506 judged result is no, prove that delivery temperature is not stablized also, then continue to gather delivery temperature
Numerical value.
Step S510, judges whether stable required time is less than the first preset time.
Step S512, if step S510 judged result is yes, by the delivery temperature pressure that last time detects before stable
The delivery temperature of contracting machine 100 is as the delivery temperature in stable state.
Step S514, if step S510 judged result is no, prove that check valve 430 does not break down, control air-conditioning
Continue to heat.
Step S516, the delivery temperature and the difference of the coil temperature of heat exchanger for air-conditioner indoor machine 300 when judging to stablize are small
It is poor in the first preset temperature.
Step S518, if step S516 judged result is yes, determine that event occurs for the check valve 430 in supercooling tube group 400
Barrier.If step S516 judged result is no, prove that check valve 430 does not break down, control air-conditioning continues to heat.
Step S520, after air-conditioning shuts down the second preset time, be converted to refrigerating state.It is determined that event occurs for check valve 430
, it is necessary to handle failure after barrier so that check valve 430 recovers normal as far as possible.Processing procedure is specially：Control is empty first
The preset time of mediation machine second, is then converted into refrigerating state.It is in order to avoid air-conditioning is directly by making to shut down the second preset time
Warm status is switched to refrigerating state.The failure of above-mentioned check valve 430 is due to that spring distortion is stuck or due to valve element 432 mostly
Making precision shortcoming, the valve element 432 of check valve 430 can not be caused by normal reset closing opening 435.In the present embodiment,
After master control borad detects failure, the second preset time is first shut down, then controls four-way valve to commutate, air-conditioning is entered refrigerating state.
After refrigerating state is entered, refrigerant flows to second port 434 by first port 433, and refrigerant applies an impact to check valve 430
Power can make the check valve 430 of dislocation have certain probability to restore.
Step S522, air-conditioner continuous freeze the 3rd preset time after shut down the second preset time, be then again converted to make
Warm status.
Step S524, after the delivery temperature of machine 100 to be compressed is stable, delivery temperature and coil temperature are detected again.In order to
Determine whether above-mentioned processing procedure is effective, after air-conditioning reenters heating state, the step of performing above-mentioned fault detect again.
Step S526, judge whether the difference of delivery temperature and coil temperature is poor less than the first preset temperature.
Step S528, if step S526 judged result is yes, control air-conditioning shuts down breath of concurrently delivering letters, and prompts the user with list
Damaged to valve 430.If above-mentioned difference is poor still less than the first preset temperature, prove that above-mentioned processing procedure does not make check valve 430
Valve element 432 restore, check valve 430 has been likely to occur mechanical failure, now control air-conditioning shut down and prompt user's check valve 430
Damage is, it is necessary to change.If step S526 judged result is no, i.e., above-mentioned difference is poor more than the first preset temperature, then proves
State processing procedure to come into force, the valve element 432 of check valve 430 is recovered.Air-conditioning recovers normal, then air-conditioning can continue normally to make
Heat.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, still can be direct according to present disclosure without departing from the spirit and scope of the present invention
It is determined that or derive many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognized
It is set to and covers other all these variations or modifications.
Claims (10)
1. fault detect and the processing method of a kind of air-conditioning super-cooled pipe group, including：
Air-conditioning opens heating；
Record since heating to the stable required time of delivery temperature of compressor；
Judge whether stable required time is less than the first preset time；
If so, the coil temperature of the delivery temperature and heat exchanger for air-conditioner indoor machine of the detection in stable state；
It is poor whether the difference of the delivery temperature and the coil temperature of the judgement in stable state is less than the first preset temperature；
And
If so, determine that the check valve in the supercooling tube group breaks down.
2. fault detect according to claim 1 and processing method, it is determined that event occurs for the check valve of the supercooling tube group
Also include after the step of barrier：
Air-conditioning is converted to refrigerating state first, is then again converted to heating state；
After the delivery temperature of the compressor is stable, the delivery temperature and the coil temperature are detected again；
Judge whether the difference of the delivery temperature in stable state and the coil temperature is less than the described first default temperature
Degree is poor；
If so, control air-conditioning shuts down breath of concurrently delivering letters, the check valve damage is prompted the user with；And
If it is not, control air-conditioning continues to heat.
3. fault detect according to claim 1 or 2 and processing method, wherein recording since heating to the row of compressor
The step of the time required to gas temperature stabilization, includes：
Since air-conditioning heating, the delivery temperature of the compressor is detected once at interval of predetermined amount of time；
Calculate the difference of adjacent delivery temperature twice；
Judge whether the difference of the last delivery temperature detected twice is less than the second preset temperature difference；
If, it is determined that the delivery temperature is stable, calculate since heating to determine the delivery temperature it is stable before last
The time difference of the delivery temperature of the secondary detection compressor is to be used as the stable required time of the delivery temperature.
4. fault detect according to claim 3 and processing method, wherein the exhaust temperature of the detection in stable state
The step of spending includes：
Using the delivery temperature for the compressor for determining to detect for the last time before the delivery temperature is stable as in stable
The delivery temperature of state.
5. fault detect according to claim 2 and processing method, wherein air-conditioning are converted to refrigerating state, Ran Houzai first
Secondary the step of being converted to heating state, includes：
After air-conditioning shuts down the second preset time, refrigerating state is converted to；
The second preset time is shut down after air-conditioner continuous the 3rd preset time of refrigeration, is then again converted to heating state.
6. a kind of air-conditioning, including：
The coolant circulating system formed is sequentially connected by compressor, outdoor unit heat exchanger and indoor set heat exchanger；
Supercooling tube group, is arranged at the downstream of the outdoor unit heat exchanger refrigerant flow, and the supercooling tube group includes：
Main capillary, its one end lead to the outdoor unit heat exchanger, and the other end connects one end of check valve；
Secondary capillary, it is parallel to the both ends of the check valve；With
The check valve, it is configured to only allow refrigerant unidirectionally to be flowed from the outdoor unit heat exchanger to the indoor set heat exchanger direction
It is logical；
Time set, record is configured to since air-conditioning heating to the stable required time of delivery temperature of compressor；
Exhaust temperature detection means, it is configured to the delivery temperature of the compressor of the detection in stable state；
Coil temperature detection means, it is configured to detect the coil temperature of the indoor set heat exchanger；With
Master control set, it is configured to be less than the first preset time the time required to delivery temperature is stable and is in the described of stable state
When delivery temperature and the difference of the coil temperature are less than the first preset temperature difference, determine that the check valve breaks down.
7. air-conditioning according to claim 6, wherein
The master control set, it is configured to after it is determined that the check valve of the supercooling tube group breaks down, controls the air-conditioning first
Refrigerating state is first converted to, is then again converted to heating state；
Exhaust temperature detection means, it is configured to detect the delivery temperature in stable state again；
Coil temperature detection means, it is configured to detect the coil temperature again；
The master control set, it is configured to be less than in the delivery temperature in stable state and the difference of the coil temperature
In the case of the first preset temperature difference, control air-conditioning shuts down breath of concurrently delivering letters, and prompts the user with the check valve damage；With
And in the case where the difference is more than the first preset temperature difference, control air-conditioning continues to heat.
8. the air-conditioning according to claim 6 or 7, wherein
The exhaust temperature detection means, it is configured to since air-conditioning heating, is detected at interval of predetermined amount of time once described
The delivery temperature of compressor；
The master control set, it is configured to calculate the difference of adjacent delivery temperature twice；In the exhaust temperature finally detected twice
In the case that whether the difference of degree is less than the second preset temperature difference, determine that the delivery temperature is stable；
The time set, it is configured to calculate since heating to the stable preceding last time detection institute of the determination delivery temperature
The time difference of the delivery temperature of compressor is stated to be used as the stable required time of the delivery temperature.
9. air-conditioning according to claim 8, wherein
The exhaust temperature detection means, be configured to determine before the delivery temperature is stable that last time detects described in
The delivery temperature of compressor is as the delivery temperature in stable state.
10. air-conditioning according to claim 7, wherein
The master control set, it is configured to after it is determined that the check valve of the supercooling tube group breaks down, control air-conditioning shuts down the
After two preset times, refrigerating state is converted to；The second preset time is shut down after control air-conditioner continuous the 3rd preset time of refrigeration, so
After be again converted to heating state.
Priority Applications (2)
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|---|---|---|---|
| CN201710582027.XA CN107525211B (en) | 2017-07-17 | 2017-07-17 | Air conditioner and fault detection and processing method of supercooling pipe set of air conditioner |
| PCT/CN2018/095663 WO2019015535A1 (en) | 2017-07-17 | 2018-07-13 | Method for detecting and addressing fault in air conditioner and undercooling tube set thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710582027.XA CN107525211B (en) | 2017-07-17 | 2017-07-17 | Air conditioner and fault detection and processing method of supercooling pipe set of air conditioner |
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| CN107525211A true CN107525211A (en) | 2017-12-29 |
| CN107525211B CN107525211B (en) | 2020-06-30 |
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| WO2019015535A1 (en) * | 2017-07-17 | 2019-01-24 | 青岛海尔空调器有限总公司 | Method for detecting and addressing fault in air conditioner and undercooling tube set thereof |
| WO2019042287A1 (en) * | 2017-08-30 | 2019-03-07 | 青岛海尔空调器有限总公司 | Air conditioner and fault detection and handling method for super-cooling tubing set thereof |
| CN110849007A (en) * | 2019-11-26 | 2020-02-28 | 宁波奥克斯电气股份有限公司 | Automatic refrigerant quantity adjusting and controlling method and device and air conditioner |
| CN113294878A (en) * | 2021-05-11 | 2021-08-24 | 宁波奥克斯电气股份有限公司 | Check valve leakage verification method and device and air conditioner |
| WO2024021430A1 (en) * | 2022-07-27 | 2024-02-01 | 青岛海尔空调器有限总公司 | Method and apparatus for diagnosing air conditioner one-way valve failure, air conditioner, and storage medium |
| CN117554109A (en) * | 2024-01-11 | 2024-02-13 | 张家港长寿工业设备制造有限公司 | Intelligent monitoring method and system for fault data information of heat exchanger |
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Also Published As
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| CN107525211B (en) | 2020-06-30 |
| WO2019015535A1 (en) | 2019-01-24 |
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