CN107747789B - The fault detection and processing method of air-conditioning and its supercooling tube group - Google Patents
The fault detection and processing method of air-conditioning and its supercooling tube group Download PDFInfo
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- CN107747789B CN107747789B CN201710765046.6A CN201710765046A CN107747789B CN 107747789 B CN107747789 B CN 107747789B CN 201710765046 A CN201710765046 A CN 201710765046A CN 107747789 B CN107747789 B CN 107747789B
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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
- F25B41/38—Expansion means; Dispositions thereof specially adapted for reversible cycles, e.g. bidirectional expansion restrictors
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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
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
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- General Engineering & Computer Science (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The present invention provides the fault detection and processing method of a kind of air-conditioning super-cooled pipe group, method of the invention judges that whether delivery temperature stablizes required time less than the first preset time during air-conditioning heating.If delivery temperature is less than the first preset time the time required to stablizing, then can determine that check valve breaks down substantially.It breaks down in order to further determine check valve, master control set also calculates after delivery temperature is stablized and indoor unit inlet air temperature and leaving air temp difference, and above-mentioned difference is compared with the first preset temperature difference.When inlet air temperature and the difference of leaving air temp are poor less than the first preset temperature, it can determine that check valve breaks down.Method of the invention stablizes the difference of time and indoor unit inlet air temperature and leaving air temp by detection compressor exhaust temperature, it can accurately determine whether the check valve in supercooling tube group breaks down, in order to timely handling failure, prevent one-way valve fault from influencing the heating effect of air-conditioning.
Description
Technical field
The present invention relates to field of air conditioning, in particular to the fault detection and processing method of a kind of air-conditioning and its supercooling tube group.
Background technique
In heat pump air conditioner use process, the check valve in supercooling tube group breaks down sometimes, cisco unity malfunction, specifically
Refer to that the spool of check valve can not reset, 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 seriously affected the heating effect of air-conditioning, greatly reduced
User experience effect.
The failure generally occurs in new air conditioner mostly, because of also insufficient, the meeting that component merges in supercooling tube group
There is spool to get stuck the phenomenon that can not resetting, is substantially not in sufficiently the problem with old adjustment.This failure is by extreme influence
Air-conditioning heating performance, therefore detected in time particularly significant.Supercooling tube group can be made to restore normal if the failure is handled aptly,
If this failure finds and repairs not in time, it may result in check valve permanent damages.In addition, since the failure has no effect on air-conditioning
Operating, while the frequency of occurrences is lower, therefore is not easy to find, but the failure influences air conditioning performance really again, influences heating effect
And user experience, therefore how detected early and try solve problems it is most important.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State the air-conditioning of problem and its fault detection and processing method of supercooling tube group.
It is an object of the invention to the failures in order to detect supercooling tube group.
Another object of the present invention is the failure in order to repair supercooling tube group.
On the one hand, the present invention provides the fault detections and processing method of a kind of air-conditioning super-cooled pipe group, comprising: air-conditioning is opened
Heating；It records the time required to stablizing since heating to the delivery temperature of compressor；Whether less than the time required to judging to stablize
One preset time；If so, detecting the inlet air temperature and leaving air temp of air conditioner indoor unit again, and calculate the temperature gap of the two；Sentence
Whether disconnected temperature gap is poor less than the first preset temperature；And if so, determine that the check valve in supercooling tube group breaks down.
Optionally, after determining the step of check valve of supercooling tube group breaks down further include: air-conditioning is converted to first
Then refrigerating state is again converted to heating state；After the delivery temperature of machine to be compressed is stablized, air conditioner indoor unit is detected again
Inlet air temperature and leaving air temp, and calculate the temperature gap of the two；Judge whether the difference of inlet air temperature and leaving air temp is less than
First preset temperature is poor；The breath if so, control air-conditioning shutdown is concurrently delivered letters, prompts the user with check valve damage；And if it is not, control
Air-conditioning continues to heat.
Optionally, the step of recording the time required to stablizing since heating to the delivery temperature of compressor includes: from air-conditioning
Heating starts, at interval of the delivery temperature of predetermined amount of time detection first compression machine；Calculate the difference of adjacent delivery temperature twice；
Whether the difference for the delivery temperature that judgement finally detects twice is less than the second preset temperature difference；If so, determining exhaust temperature
Degree is stablized, and the time difference of the delivery temperature of last time detection compressor before stablizing since heating to determining delivery temperature is calculated
The time required to stablizing as delivery temperature.
Optionally, the step of air-conditioning is converted to refrigerating state first, is then again converted to heating state includes: that air-conditioning stops
After the second preset time of machine, refrigerating state is converted to；The second preset time is shut down after air-conditioner continuous refrigeration third preset time, so
After be again converted to heating state.
On the other hand, the present invention also provides a kind of air-conditionings, comprising: is changed by compressor, outdoor unit heat exchanger and indoor unit
Hot device is sequentially connected the coolant circulating system to be formed；Supercooling tube group is set to the downstream of outdoor unit heat exchanger refrigerant flow, supercooling
Pipe group includes: main capillary, and one end leads to indoor set 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 is configured to record and stablizes required time to the delivery temperature of compressor since air-conditioning heating；Inlet air temperature
Detection device is configured to the inlet air temperature of detection air conditioner indoor unit；Leaving air temp detection device is configured to detection air conditioner indoor unit
Leaving air temp；And master control set, it is configured to the time required to delivery temperature is stablized less than the first preset time and delivery temperature
When the inlet air temperature of air conditioner indoor unit and the difference of leaving air temp are poor less than the first preset temperature after stabilization, check valve is determined
Failure.
Optionally, check valve includes: valve body, internal to form the chamber to circulate for refrigerant, and chamber interior has for refrigerant
The opening of circulation；And spool, it is set to chamber interior, can be moved along the extending direction of chamber, to open or close opening.
Optionally, inlet air temperature detection device includes the temperature sensor for being set to indoor unit air inlet；Leaving air temp
Detection device includes the temperature sensor being set at air outlet of indoor set.
Optionally, master control set is configured to after determining that the check valve of supercooling tube group breaks down, and control air-conditioning is first
Refrigerating state is converted to, heating state is then again converted to；Inlet air temperature detection device is configured to detect in air conditioning chamber again
The inlet air temperature of machine；Leaving air temp detection device is configured to detect the leaving air temp of air conditioner indoor unit again；Master control set, also
It is default still less than first to be configured to the inlet air temperature of air conditioner indoor unit and the difference of leaving air temp after delivery temperature is stable again
In the case where temperature difference, control air-conditioning shuts down breath of concurrently delivering letters, and prompts the user with check valve damage；And it is greater than first in difference
In the case where preset temperature difference, control air-conditioning continues to heat.
Optionally, above-mentioned air-conditioning further include: exhaust temperature detection means are configured to since air-conditioning heating, at interval of pre-
The delivery temperature of section of fixing time detection first compression machine；Master control set is configured to calculate the difference of adjacent delivery temperature twice；
In the case where whether the difference of the delivery temperature finally detected twice is less than the second preset temperature difference, delivery temperature is determined
Stablize；Time set is configured to calculate last time detection compressor before stablizing since heating to determining delivery temperature
The time difference of delivery temperature is to stablize required time as delivery temperature.
Optionally, master control set is configured to after determining that the check valve of supercooling tube group breaks down, and 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 refrigeration third preset time,
Then it is again converted to heating state.
Method of the invention judges that whether delivery temperature stablizes required time less than first during air-conditioning heating
Preset time.When heating state supercooling tube group check valve breaks down, the opening of valve body cannot 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
Degree is less than the first preset time the time required to stablizing, then can determine that check valve breaks down substantially.In order to further true
To determine check valve to break down, master control set also calculates the difference of indoor unit inlet air temperature and leaving air temp when delivery temperature is stablized,
And above-mentioned difference is compared with the first preset temperature difference.If check valve breaks down, secondary capillary can not play throttling and make
With the delivery temperature of compressor will lead to the inlet air temperature and leaving air temp ten of indoor unit much smaller than level when normally heating
Tap is close.Therefore, when inlet air temperature and the difference of leaving air temp are poor less than the first preset temperature, check valve can be determined
Failure.Method of the invention by detection compressor exhaust temperature stablize time and stable state indoor unit inlet air temperature and
The difference of leaving air temp judges whether check valve breaks down, and detection process is simple and convenient, can determine supercooling tube without tearing machine open
Whether the check valve in group breaks down.Method of the invention is conducive to find simultaneously handling failure in time, prevents one-way valve fault
Influence the heating effect of air-conditioning.
Further, method of the invention further includes the processing to one-way valve fault.In the check valve for determining 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 entering refrigerating state
Matchmaker flows to second port by the first port of check valve, and refrigerant, which applies an impact force to check valve, can make the spool of dislocation have one
Determine probability recovery.The method for restoring to execute above-mentioned fault detection after heating again.I.e. exhaust temperature detection means detect again into
The difference of air temperature and leaving air temp.If above-mentioned difference is poor still less than the first preset temperature, prove that the spool of check valve is not multiple
Original controls air-conditioning at this time and shuts down and user's check valve is prompted to damage, needs replacing.If above-mentioned difference is greater than the first preset temperature
Difference then proves that the spool of check valve restores, restores normal, then air-conditioning can be heated normally.Method of the invention is determining supercooling
When the check valve of pipe group utilizes air conditioner refrigerating after breaking down, refrigerant makes valve core reset to the impact force of inner elements of check valve,
So that check valve restores normal.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached 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 the fault detection of air-conditioning super-cooled pipe group according to an embodiment of the invention and the schematic diagram of processing method；
Fig. 5 is the fault detection of empty supercooling tube group in accordance with another embodiment of the present invention and the flow chart of processing method.
Specific embodiment
The embodiment of the present invention provides firstly a kind of air-conditioning, comprising: 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 set to 200 refrigerant stream of outdoor unit heat exchanger
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 is under refrigerating state followed by compressor 100, outdoor unit heat exchanger 200, supercooling
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 410 one end of capillary leads to indoor set heat exchanger 300, 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, spool 432
And spring.Spool 432 is set to the chamber interior of valve body 431, and chamber interior also has the opening 435 for refrigerant circulation, spool
432 can move along the extending direction of chamber, when refrigerant flows to first port 433 by second port 434, spool 432 by
The percussion of refrigerant is moved towards first port 433, and opening 435 is kept open, and refrigerant is allowed to circulate；When refrigerant is by first
When port 433 flows to second port 434, percussion occlusion of openings 435 of the spool 432 by refrigerant prevents refrigerant from circulating.Bullet
Spring is used to provided to spool 432 towards the restoring force that moves of 435 directions of opening, so that spool 432 is by refrigerant when not acted on,
It is restored 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 check valve 430 only comprising valve body 431, spool 432.The impact force of refrigerant restores when spool 432 fully relies on heating.
The normal work principle of the supercooling tube group 400 of the present embodiment are as follows: in air conditioner refrigerating, as shown in Fig. 2, refrigerant is by
Two-port netwerk 434 flows to first port 433, and check valve 430 is connected, and refrigerant enters main capillary 410 by check valve 430, therefore secondary
Capillary 420 cuts little ice.In air-conditioning heating, as shown in figure 3, 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, certain
In the case of (such as spring failure or due to spool 432 production precision shortcoming the problems such as lead to the spool of check valve 430
432 could not normal reset), it may appear that in air-conditioning heating, the spool 432 of check valve 430 is led completely plugged opening 435
Refrigeration matchmaker is circulated by check valve 430, so that secondary capillary 420 does not have any effect.If secondary capillary 420 cannot play section
The resistance of stream effect, refrigerant circulation becomes smaller, and the delivery temperature of compressor 100 can be rapidly achieved stable state.Meanwhile compressor
Delivery temperature and the difference of indoor unit coil temperature are reduced, and heating efficiency is caused sharply to decline.The temperature of indoor set heat exchanger 300 drops
It is low, and then the inlet air temperature of air conditioner indoor unit and the difference of leaving air temp is caused to be greatly reduced.And the air-conditioning of the present embodiment can
Detect the failure of check valve 430 in above-mentioned supercooling tube group 400, in time to prevent 430 failure of check valve from causing to heating effect
Adverse effect.
The air-conditioning of the present embodiment further include: time set 110, exhaust temperature detection means 120, inlet air temperature detection device
310, leaving air temp detection device 320 and master control set 500.Time set 110 is configured to record since air-conditioning heating to pressure
The time required to the delivery temperature of contracting machine 100 is stablized, above-mentioned time set 110 can be the clock etc. built in timer or air-conditioning.
Exhaust temperature detection means 120 are configured to the delivery temperature of detection compressor 100, and above-mentioned exhaust temperature detection means 120 can be with
For the temperature sensor for being set to 100 exhaust outlet of compressor.Inlet air temperature detection device 310 is configured to detection indoor unit air inlet
The air themperature at place, inlet air temperature detection device 310 can be the temperature sensor for being set to indoor unit air inlet.Wind-warm syndrome out
Degree detection device 320 is configured to the air themperature at detection air outlet of indoor set, and leaving air temp detection device 320 can be setting
Temperature sensor at air outlet of indoor set.Master control set 500 is configured to the time required to delivery temperature is stablized less than first
The inlet air temperature of air conditioner indoor unit and the difference of leaving air temp are less than the first preset temperature after preset time and delivery temperature are stablized
When poor, determine that check valve 430 breaks down.
When air-conditioning has just started heating, refrigerant circulation needs a period of time to stablize, therefore the delivery temperature of compressor 100
Consecutive variations in a period of time heated can just be started in air-conditioning, then can just tended towards stability.In the present embodiment, delivery temperature
Detection device 120 is since air-conditioning heating, at interval of the delivery temperature of predetermined amount of time detection first compression machine 100, such as often
It is primary every 1s detection, obtain an outlet air temperature.With the increase of heating time, exhaust temperature detection means 120 can be detected
To the temperature value of one group of consecutive variations at any time.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, determine
Delivery temperature is stablized.When exhaust temperature detection means 120 detect new delivery temperature, master control set 500 is calculated finally
The difference for the delivery temperature that (or newest twice) detects twice, if above-mentioned temperature gap is poor less than the second preset temperature,
Prove that delivery temperature tends towards stability, above-mentioned second preset temperature difference may be configured as 1 DEG C.The row of last time detection before stablizing
Temperature degree can be used as delivery temperature when stable state.Before the calculating of time set 110 is stablized since heating to delivery temperature
The time difference of last time detection delivery temperature is to stablize required time as delivery temperature.
Master control set 500 first determines whether that whether delivery temperature stablizes required time less than the first preset time.In heating shape
When 400 check valve 430 of state supercooling tube group breaks down, the opening 435 of valve body 431 cannot 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
Degree stablizes required time less than the first preset time, then can determine that check valve 430 breaks down substantially.In order to further true
Determine check valve 430 to break down, master control set 500 also calculates the inlet air temperature and leaving air temp of indoor unit after delivery temperature is stablized
Between difference, and above-mentioned difference is compared with the first preset temperature difference.If check valve 430 breaks down, secondary capillary
420 can not play throttling action, lead to the reduction of refrigerant heat exchange efficiency, and air-conditioning heating efficiency sharply declines, the air inlet temperature of indoor unit
Degree and leaving air temp can be very close.It therefore, can when inlet air temperature and the difference of leaving air temp are poor less than the first preset temperature
To determine that check valve 430 breaks down.
The air-conditioning of the present embodiment after the failure for detecting above-mentioned check valve 430, can with further progress troubleshooting,
To repair check valve 430 in time.Master control set 500 is after the check valve 430 for determining 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 and shuts down
After second preset time, refrigerating state is converted to；The second preset time is shut down after control air-conditioner continuous refrigeration third preset time,
Then it is again converted to heating state.In the present embodiment, above-mentioned second preset time can be 1min, and third preset time can
Think 2min.
The failure of above-mentioned check valve 430 be mostly due to spring distortion is stuck or due to spool 432 production precision owe
It lacks, the spool 432 of check valve 430 can not be caused by normal reset closing opening 435.In the present embodiment, it is detected in master control borad
To after failure, the second preset time is first shut down, then controls four-way valve commutation, air-conditioning is made to enter refrigerating state.Entering the shape that freezes
After state, refrigerant flows to second port 434 by first port 433, and refrigerant, which applies an impact force to check valve 430, can make dislocation
Spool 432 has certain probability to restore.
The second preset time is shut down after third preset time of freezing, is then again converted to heating state.Due to air-conditioning
It should not be converted directly into heating state by refrigerating state, air-conditioning is damaged in order to prevent, after refrigeration, need to shut down
Start to heat again after second preset time.Again after heating, the method for above-mentioned fault detection is executed again.I.e. delivery temperature detects
Device 120 is detected again after delivery temperature is in stable state, and inlet air temperature detection device 310 detects air conditioner indoor unit again
Inlet air temperature；Leaving air temp detection device 320 detects the leaving air temp of air conditioner indoor unit again.Master control set 500 is in air inlet temperature
In the case that the difference of degree and leaving air temp is poor less than the first preset temperature, control air-conditioning shuts down breath of concurrently delivering letters, and mentions to user
Show that check valve 430 damages.If above-mentioned difference is poor still less than the first preset temperature, prove that the spool 432 of check valve 430 is not multiple
Original controls air-conditioning at this time and shuts down and user's check valve 430 is prompted to damage, needs replacing.Above-mentioned prompt information can pass through air-conditioning
Panel is shown.If above-mentioned difference is greater than, the first preset temperature is poor, proves that the spool 432 of check valve 430 restores, restores just
Often, then air-conditioning can be heated normally.
The present invention also provides the fault detections and processing method of a kind of air-conditioning super-cooled pipe group 400.Fig. 4 is according to the present invention
The fault detection of the 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.When air-conditioning heating, refrigerant is by followed by compressor 100, indoor set heat exchanger
300, supercooling tube group 400 and outdoor unit heat exchanger 200.
Step S404 is recorded the time required to stablizing since heating to the delivery temperature of compressor 100.Just start in air-conditioning
When heating, refrigerant circulation needs a period of time to stablize, therefore the delivery temperature of compressor 100 also can just start heating in air-conditioning
Then consecutive variations in a period of time can just tend towards stability.
Whether step S406 judges aforementioned stable required time less than the first preset time.In heating state supercooling tube group
When 400 check valves 430 break down, the opening 435 of valve body 431 cannot 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 the judging result of step S406 is yes, delivery temperature of the detection in stable state.If exhaust temperature
Degree stablizes required time less than the first preset time, then can determine that check valve 430 breaks down substantially.In order to further true
Determine check valve 430 to break down, after master control set 500 also calculates delivery temperature stabilization, indoor unit inlet air temperature and leaving air temp
Difference, and above-mentioned difference is compared with the first preset temperature difference.
Step S410, if the judging result of step S406 be it is no, there is no failure, air-conditioning continues just check valve 430
Often heating.
Step S412 judges whether the difference of inlet air temperature and leaving air temp is poor less than the first preset temperature.Calculate compression
The difference of inlet air temperature and leaving air temp after 100 delivery temperature of machine is stablized, and above-mentioned difference and the first preset temperature difference are carried out
Compare.
Step S414, if the judging result of step S412 be it is yes, determine the check valve 430 in supercooling tube group 400 occur therefore
Barrier.If check valve 430 breaks down, secondary capillary 420 can not play throttling action, and refrigerant heat exchange efficiency reduces.Compressor 100
Delivery temperature much smaller than normal heating when level, the heating efficiency that will lead to air-conditioning sharply declines, the air inlet temperature of indoor unit
Degree and leaving air temp can be very close.Therefore, the indoor unit inlet air temperature when stablizing and leaving air temp are less than the first default temperature
When degree difference, it can determine that check valve 430 breaks down.
Fig. 5 is the fault detection of air-conditioning super-cooled pipe group 400 according to an embodiment of the invention and the process of processing method
Figure, the control method are perform the following steps in sequence:
Step S502, since air-conditioning heating, at interval of the delivery temperature of predetermined amount of time detection first compression machine 100.
Since air-conditioning heating, one is detected at interval of the delivery temperature of predetermined amount of time detection first compression machine 100, such as every 1s
It is secondary, obtain an outlet air temperature.With the increase of heating time, the temperature value of one group of consecutive variations at any time can be detected.
Step S504 calculates the difference of adjacent delivery temperature twice.When each detection device detects new delivery temperature,
Calculate the difference of the last adjacent delivery temperature detected twice.
Step S506, whether the difference for the delivery temperature that judgement finally detects twice is less than the second preset temperature difference.
Step S508, if the judging result of step S506 be it is yes, determine delivery temperature stablize, calculate since heating to row
The time required to the time difference that last time detects delivery temperature before temperature degree is stablized stablizes as delivery temperature.If above-mentioned temperature
Difference then proves that delivery temperature tends towards stability less than the second default value, and above-mentioned second preset temperature difference may be configured as 1 DEG C.
The time difference of last time detection delivery temperature before stablizing since heating to delivery temperature is calculated to stablize as delivery temperature
Required time.If the judging result of step S506 be it is no, prove that delivery temperature is not also stable, then continue to acquire delivery temperature
Numerical value.
Step S510, whether less than the first preset time the time required to judging to stablize.
Step S512, if the judging result of step S510 is pressure yes, that last time detects before delivery temperature is stablized
The delivery temperature of contracting machine 100 is as the delivery temperature for being in stable state.
Step S514, if the judging result of step S510 be it is no, prove that check valve 430 does not break down, control air-conditioning
Continue to heat.
Step S516, after judging that delivery temperature is stablized, the inlet air temperature of air conditioner indoor unit and the difference of leaving air temp are less than
First preset temperature is poor.
Step S518, if the judging result of step S516 be it is yes, determine the check valve 430 in supercooling tube group 400 occur therefore
Barrier.If the judging result of step S516 be it is no, prove that check valve 430 does not break down, control air-conditioning continue to heat.
Step S520 is converted to refrigerating state after air-conditioning shuts down the second preset time.Determining that it is former that check valve 430 occurs
It after barrier, needs to handle failure, so that check valve 430 restores normal as far as possible.Treatment process specifically: control is empty first
The second preset time of mediation machine, is then converted into refrigerating state.Shutting down the second preset time is in order to avoid air-conditioning is directly by making
Warm status is switched to refrigerating state.The failure of above-mentioned check valve 430 is since spring distortion is stuck or due to spool 432 mostly
Production precision shortcoming, the spool 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 commutation, air-conditioning is made to enter refrigerating state.
After entering refrigerating state, 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 refrigeration third 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 stablized, the inlet air temperature of detection indoor unit and out wind-warm syndrome again
Degree.In order to determine whether above-mentioned treatment process is effective, after air-conditioning reenters heating state, above-mentioned fault detection is executed again
The step of.
Step S526 judges whether the difference of inlet air temperature and leaving air temp is poor less than the first preset temperature.
Step S528, if the judging result of step S526 be it is yes, control air-conditioning shutdown is concurrently delivered letters breath, and list is prompted the user with
It is damaged to valve 430.If above-mentioned difference is poor still less than the first preset temperature, proving above-mentioned treatment process not makes check valve 430
Spool 432 restore, check valve 430 has been likely to occur mechanical failure, controls air-conditioning at this time and shuts down and prompt user's check valve 430
Damage, needs replacing.If the judging result of step S526 be it is no, i.e., above-mentioned difference be greater than the first preset temperature it is poor, then prove on
It states treatment process to come into force, the spool 432 of check valve 430 is recovered.Air-conditioning restores normal, then air-conditioning can continue normally to make
Heat.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (10)
1. a kind of fault detection and processing method of air-conditioning super-cooled pipe group, comprising:
Air-conditioning opens heating；
It records the time required to stablizing since heating to the delivery temperature of compressor；
Whether less than the first preset time the time required to judging to stablize；
If so, detecting the inlet air temperature and leaving air temp of the air conditioner indoor unit again, and calculate the temperature gap of the two；
Judge whether the temperature gap is poor less than the first preset temperature；And
If so, determining that the check valve in the supercooling tube group breaks down；Wherein
The air-conditioning includes compressor, outdoor unit heat exchanger, indoor set heat exchanger, and by compressor, outdoor unit heat exchanger, room
The coolant circulating system that interior machine heat exchanger is formed；
The supercooling tube group, is set to the downstream of the outdoor unit heat exchanger refrigerant flow, and the check valve of the supercooling tube group is matched
Being set to only allows refrigerant from the outdoor unit heat exchanger to indoor set heat exchanger direction one-way flow, and the supercooling tube group is also
Include:
Main capillary, one end lead to the indoor set heat exchanger, and the other end connects one end of the check valve；
Secondary capillary is parallel to the both ends of the check valve.
2. fault detection according to claim 1 and processing method, wherein in the check valve hair for determining the supercooling tube group
After the step of raw failure further include:
Air-conditioning is converted to refrigerating state first, is then again converted to heating state；
After the delivery temperature of the compressor is stablized, the inlet air temperature and leaving air temp of the air conditioner indoor unit are detected again,
And calculate the temperature gap of the two；
It is poor to judge whether the difference of the inlet air temperature and leaving air temp is less than first preset temperature；
The breath if so, control air-conditioning shutdown is concurrently delivered letters, prompts the user with the check valve damage；And
If it is not, control air-conditioning continues to heat.
3. fault detection according to claim 1 or 2 and processing method, wherein recording the row since heating to compressor
Temperature degree stablize the time required to the step of include:
Since air-conditioning heating, the delivery temperature of the primary compressor is detected at interval of predetermined amount of time；
Calculate the difference of adjacent delivery temperature twice；
Whether the difference for the delivery temperature that judgement finally detects twice is less than the second preset temperature difference；
If so, determine that the delivery temperature is stablized, last is calculated before stablizing since heating to the determination delivery temperature
The time difference of the delivery temperature of the secondary detection compressor is to stablize required time as the delivery temperature.
4. fault detection according to claim 2 and processing method, wherein air-conditioning is converted to refrigerating state first, then again
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 refrigeration third preset time, is then again converted to heating state.
5. a kind of air-conditioning, comprising:
The coolant circulating system formed is sequentially connected by compressor, outdoor unit heat exchanger and indoor set heat exchanger；
Supercooling tube group, is set to the downstream of the outdoor unit heat exchanger refrigerant flow, and the supercooling tube group includes:
Main capillary, one end lead to the indoor set heat exchanger, and the other end connects one end of check valve；
Secondary capillary is parallel to the both ends of the check valve；With
The check valve is configured to only to allow refrigerant from the outdoor unit heat exchanger to indoor set heat exchanger direction one-way flow
It is logical；
Time set is configured to record and stablizes required time to the delivery temperature of compressor since air-conditioning heating；
Inlet air temperature detection device is configured to detect the inlet air temperature of the air conditioner indoor unit；
Leaving air temp detection device is configured to detect the leaving air temp of the air conditioner indoor unit；With
Master control set is configured to less than the first preset time and described after delivery temperature is stablized the time required to delivery temperature is stablized
When the inlet air temperature of air conditioner indoor unit and the difference of leaving air temp poor less than the first preset temperature, determine that event occurs for the check valve
Barrier.
6. air-conditioning according to claim 5, wherein the check valve includes:
Valve body, internal to form the chamber to circulate for refrigerant, the chamber interior has the opening to circulate for refrigerant；With
Spool is set to the chamber interior, can move along the extending direction of chamber, to open or close the opening.
7. air-conditioning according to claim 5, wherein
The inlet air temperature detection device includes the temperature sensor for being set to the indoor unit air inlet；
The leaving air temp detection device includes the temperature sensor being set at the air outlet of indoor set.
8. air-conditioning according to claim 5, wherein
The master control set is configured to after determining that the check valve of the supercooling tube group breaks down, and it is first to control the air-conditioning
Refrigerating state is first converted to, heating state is then again converted to；
Inlet air temperature detection device is configured to detect the inlet air temperature of the air conditioner indoor unit again；
Leaving air temp detection device is configured to detect the leaving air temp of the air conditioner indoor unit again；
The master control set is configured to the inlet air temperature with wind-warm syndrome out of the air conditioner indoor unit after delivery temperature is stable again
In the case that the difference of degree is poor still less than the first preset temperature, control air-conditioning shuts down breath of concurrently delivering letters, and prompts the user with the list
It is damaged to valve；And in the case where the difference is greater than the first preset temperature difference, control air-conditioning continues to heat.
9. the air-conditioning according to any one of claim 5 to 8, further includes:
Exhaust temperature detection means are configured to since air-conditioning heating, detect the primary compressor at interval of predetermined amount of time
Delivery temperature；
The master control set 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 stablized；
The time set is configured to calculate and stablizes preceding last time detection institute to the determination delivery temperature since heating
The time difference of the delivery temperature of compressor is stated to stablize required time as the delivery temperature.
10. air-conditioning according to claim 8, wherein
The master control set is configured to after determining that the check valve of the supercooling tube group breaks down, and 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 refrigeration third preset time, so
After be again converted to heating state.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765046.6A CN107747789B (en) | 2017-08-30 | 2017-08-30 | The fault detection and processing method of air-conditioning and its supercooling tube group |
| PCT/CN2018/102767 WO2019042287A1 (en) | 2017-08-30 | 2018-08-28 | Air conditioner and fault detection and handling method for super-cooling tubing set thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765046.6A CN107747789B (en) | 2017-08-30 | 2017-08-30 | The fault detection and processing method of air-conditioning and its supercooling tube group |
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| CN107747789A CN107747789A (en) | 2018-03-02 |
| CN107747789B true CN107747789B (en) | 2019-11-05 |
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| WO (1) | WO2019042287A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702271B (en) * | 2017-08-30 | 2020-02-04 | 青岛海尔空调器有限总公司 | Air conditioner and fault detection and processing method of supercooling pipe set of air conditioner |
| CN107747789B (en) * | 2017-08-30 | 2019-11-05 | 青岛海尔空调器有限总公司 | The fault detection and processing method of air-conditioning and its supercooling tube group |
| CN109059089B (en) * | 2018-06-26 | 2020-11-03 | Tcl空调器(中山)有限公司 | Control method of heating apparatus, and computer-readable storage medium |
| CN109398024A (en) * | 2018-09-05 | 2019-03-01 | 北汽福田汽车股份有限公司 | The detection method and device of vehicle air conditioning |
| CN111025138B (en) * | 2019-12-16 | 2021-08-20 | 华为技术有限公司 | Detection device and server |
| CN115218341B (en) * | 2022-06-29 | 2024-05-14 | 北京小米移动软件有限公司 | Method, device and storage medium for detecting state of air conditioner refrigerant |
| CN115507518A (en) * | 2022-09-22 | 2022-12-23 | 青岛海尔空调器有限总公司 | Method and device for determining fault of one-way valve, air conditioner and storage medium |
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| CN107747789A (en) | 2018-03-02 |
| WO2019042287A1 (en) | 2019-03-07 |
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