CN105953483A - Multiple-on-line system and failure detection method for throttling elements of indoor units of multiple-on-line system - Google Patents
Multiple-on-line system and failure detection method for throttling elements of indoor units of multiple-on-line system Download PDFInfo
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- CN105953483A CN105953483A CN201610264531.0A CN201610264531A CN105953483A CN 105953483 A CN105953483 A CN 105953483A CN 201610264531 A CN201610264531 A CN 201610264531A CN 105953483 A CN105953483 A CN 105953483A
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- indoor set
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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
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0293—Control issues related to the indoor fan, e.g. controlling speed
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
Abstract
The invention discloses a multiple-on-line system and a failure detection method for throttling elements of indoor units of the multiple-on-line system. The failure detection method comprises the following steps that if any one of multiple indoor units is in a refrigeration mode standby state after a compressor is started and operates normally, the throttling element of the indoor unit which is in the refrigeration mode standby state and an indoor draught fan are both controlled to be in a stopped state; the current indoor environment temperature of the indoor unit and the inlet temperature and the outlet temperature of an indoor heat exchanger of the indoor unit are detected; and whether the throttling element in the indoor unit is in a failure state or not is judged according to the current indoor environment temperature of the indoor unit and the inlet temperature and the outlet temperature of the indoor heat exchanger of the indoor unit. By means of the failure detection method, whether the throttling elements of the indoor units are in the failure state or not can be effectively detected out, accordingly, whether a refrigerant flowing phenomenon happens on the indoor unit which is in the standby state or not can be found out in time, and the comfort, stability and safety of the system are guaranteed.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly to the failure detection side of indoor set restricting element in a kind of multiple on-line system
Method and a kind of multiple on-line system.
Background technology
At present, the multiple on-line system many uses electric expansion valve on market is as the throttle part of indoor set.Pass compared to other
System physical restriction parts, electric expansion valve, in control mode and control accuracy, has unrivaled advantage so that it is become
Main flow throttle part in multiple on-line system.
But, either because production technology problem or failure in a long time, currently used electric expansion valve all also exists necessarily
Fault rate.And for the indoor set of the multiple on-line system under the indoor set of multiple on-line system, especially holding state, work as electricity
When sub-expansion valve is in failure state, indoor set will there is coolant flow through, can be to the comfortableness of system, stability and safety
Bring major hidden danger, therefore, the most effectively detect electric expansion valve in indoor set and whether be in failure state and become to bite at present and treat
The problem solved.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose the abatement detecting method of indoor set restricting element in a kind of multiple on-line system, and the method can effectively detect
Whether indoor set restricting element is in failure state, such that it is able to find whether the indoor set under holding state coolant occurs in time
The phenomenon of flowing, the comfortableness of safeguards system, stability and safety.
Further object is that a kind of multiple on-line system of proposition.
For achieving the above object, the mistake of indoor set restricting element during one aspect of the present invention embodiment proposes a kind of multiple on-line system
Effect detection method, described multiple on-line system includes off-premises station and multiple indoor set, and described off-premises station includes compressor, described many
Each indoor set in individual indoor set all includes that indoor heat exchanger, restricting element and indoor fan, described method include following step
Rapid: at the compressor start of described off-premises station and after entering normal operation, if any one is indoor in the plurality of indoor set
Machine is in refrigeration mode holding state, then control the restricting element in this indoor set and indoor fan is in closed mode；Logical
Cross to should indoor set arrange the first to the 3rd temperature detector detect the current indoor environment temperature residing for this indoor set respectively
Degree, the inlet temperature of indoor heat exchanger and the outlet temperature of indoor heat exchanger in this indoor set；And according to residing for this indoor set
Current indoor ambient temperature, inlet temperature and the outlet temperature of indoor heat exchanger judge the joint in this indoor set in this indoor set
Whether fluid element is in failure state.
The abatement detecting method of indoor set restricting element in multiple on-line system according to embodiments of the present invention, in the compression of off-premises station
After machine starts and enters normal operation, if in multiple indoor set, any one indoor set is in refrigeration mode holding state, then
Control the restricting element in this indoor set and indoor fan be in closed mode, and by should indoor set arrange first
Indoor heat exchanger in the current indoor ambient temperature residing for this indoor set, this indoor set is detected respectively to the 3rd temperature detector
Inlet temperature and the outlet temperature of indoor heat exchanger, and according to the current indoor ambient temperature residing for this indoor set, these indoor
In machine, inlet temperature and the outlet temperature of indoor heat exchanger judge whether the restricting element in this indoor set is in failure state, from
And realize the effective detection to indoor set restricting element, find whether the indoor set under holding state occurs what coolant flowed in time
Phenomenon, the comfortableness of safeguards system, stability and safety.
According to one embodiment of present invention, described according in the current indoor ambient temperature residing for this indoor set, this indoor set
The inlet temperature of indoor heat exchanger and outlet temperature judge whether the restricting element in this indoor set is in failure state, including:
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature is less than or equal to the first temperature threshold and institute
State temperature gap between current indoor ambient temperature and described inlet temperature more than or equal to the second temperature threshold and described currently
Temperature gap between indoor environment temperature and described outlet temperature is more than or equal to described second temperature threshold, then preliminary judgement should
Restricting element in indoor set is in failure state.
According to one embodiment of present invention, after the restricting element in this indoor set of preliminary judgement is in failure state, also
Control the restricting element in this indoor set and perform flyback action, and after time delay Preset Time, again judge residing for this indoor set
Current indoor ambient temperature, the inlet temperature of indoor heat exchanger and outlet temperature in this indoor set；If described inlet temperature
And the absolute value of the temperature gap between described outlet temperature is less than or equal to described first temperature threshold and described current indoor ring
Temperature gap between border temperature and described inlet temperature is more than or equal to described second temperature threshold and described current indoor environment
Temperature gap between temperature and described outlet temperature is more than or equal to described second temperature threshold, then judge the joint in this indoor set
Fluid element is in failure state.
According to one embodiment of present invention, before whether the restricting element in judging this indoor set is in failure state, also
Judge to should indoor set arrange the first to the 3rd temperature detector whether break down.
According to one embodiment of present invention, described judgement to should the first to the 3rd temperature detector of arranging of indoor set whether
Break down, including: after this indoor set powers on and the compressor of described off-premises station not actuated before, to residing for this indoor set
In current indoor ambient temperature, this indoor set, inlet temperature and the outlet temperature of indoor heat exchanger judge；Enter described in if
The absolute value of the temperature gap between mouth temperature and described outlet temperature is less than or equal to the 3rd temperature threshold and described current indoor
The absolute value of the temperature gap between ambient temperature and described inlet temperature is less than or equal to the 4th temperature threshold and described works as cup
The absolute value of the temperature gap between interior ambient temperature and described outlet temperature is less than or equal to described 4th temperature threshold, then judge
To should indoor set arrange the first to the 3rd temperature detector all do not break down.
Further, the abatement detecting method of indoor set restricting element in above-mentioned multiple on-line system, also include: if described
The absolute value of the temperature gap between inlet temperature and described outlet temperature less than or equal to described 3rd temperature threshold and described work as
The absolute value of the temperature gap between front indoor environment temperature and described inlet temperature is more than described 4th temperature threshold and described
The absolute value of the temperature gap between current indoor ambient temperature and described outlet temperature is more than described 4th temperature threshold, then sentence
Disconnected to breaking down by the first temperature detector of arranging of indoor set；If between described inlet temperature and described outlet temperature
Temperature gap absolute value more than described 3rd temperature threshold and described current indoor ambient temperature and described inlet temperature it
Between the absolute value of temperature gap less than or equal to described 4th temperature threshold and described current indoor ambient temperature and described outlet
The absolute value of the temperature gap between temperature be more than described 4th temperature threshold, then judge to should indoor set arrange the 3rd temperature
Degree detector breaks down；If the absolute value of the temperature gap between described inlet temperature and described outlet temperature is more than described
The absolute value of the 3rd temperature threshold and the temperature gap between described current indoor ambient temperature and described inlet temperature is more than institute
The absolute value stating the 4th temperature threshold and the temperature gap between described current indoor ambient temperature and described outlet temperature is less than
Equal to described 4th temperature threshold, then judge breaking down by the second temperature detector of arranging of indoor set.
For achieving the above object, another aspect of the present invention embodiment proposes a kind of multiple on-line system, including: off-premises station, institute
State off-premises station and include compressor；Multiple indoor sets, each indoor set in the plurality of indoor set all include indoor heat exchanger,
Restricting element and indoor fan；The first to the 3rd temperature detector that corresponding each indoor set is arranged, described first to the 3rd temperature
Degree detector is respectively used to detect indoor heat exchanger in the current indoor ambient temperature residing for each indoor set, each indoor set
Inlet temperature and the outlet temperature of indoor heat exchanger；And control module, described control module respectively with corresponding each indoor set
The first to the 3rd temperature detector arranged is connected, wherein, at the compressor start of described off-premises station and after entering normal operation,
If any one indoor set is in refrigeration mode holding state in the plurality of indoor set, described control module then controls this room
Restricting element in interior machine and indoor fan are in closed mode, and according to the current indoor ambient temperature residing for this indoor set,
In this indoor set, inlet temperature and the outlet temperature of indoor heat exchanger judge whether the restricting element in this indoor set is in inefficacy shape
State.
Multiple on-line system according to embodiments of the present invention, at the compressor start of off-premises station and after entering normal operation, if many
In individual indoor set, any one indoor set is in refrigeration mode holding state, and control module then controls the throttling unit in this indoor set
Part and indoor fan are in closed mode, and according to the current indoor ambient temperature residing for this indoor set of detection, these indoor
In machine, inlet temperature and the outlet temperature of indoor heat exchanger judge whether the restricting element in this indoor set is in failure state, from
And realize the effective detection to indoor set restricting element, find whether the indoor set under holding state occurs what coolant flowed in time
Phenomenon, the comfortableness of safeguards system, stability and safety.
According to one embodiment of present invention, described control module according to the current indoor ambient temperature residing for this indoor set,
In this indoor set, inlet temperature and the outlet temperature of indoor heat exchanger judge whether the restricting element in this indoor set is in inefficacy shape
During state, wherein, if the absolute value of the temperature gap between described inlet temperature and described outlet temperature is less than or equal to the first temperature
Degree threshold value and the temperature gap between described current indoor ambient temperature and described inlet temperature more than or equal to the second temperature threshold,
And the temperature gap between described current indoor ambient temperature and described outlet temperature is more than or equal to described second temperature threshold, institute
The restricting element stated in control module this indoor set of then preliminary judgement is in failure state.
According to one embodiment of present invention, described control module restricting element in this indoor set of preliminary judgement is in inefficacy
After state, also control the restricting element in this indoor set and perform flyback action, and after time delay Preset Time, again judge
The inlet temperature of indoor heat exchanger and outlet temperature in current indoor ambient temperature residing for this indoor set, this indoor set, and
The absolute value of the temperature gap between described inlet temperature and described outlet temperature is less than or equal to described first temperature threshold and institute
State temperature gap between current indoor ambient temperature and described inlet temperature more than or equal to described second temperature threshold and described
When temperature gap between current indoor ambient temperature and described outlet temperature is more than or equal to described second temperature threshold, described control
Molding block judges that the restricting element in this indoor set is in failure state.
According to one embodiment of present invention, whether described control module restricting element in judging this indoor set is in inefficacy
Before state, also judge to should indoor set arrange the first to the 3rd temperature detector whether break down.
According to one embodiment of present invention, described control module judge to should indoor set arrange the first to the 3rd temperature
When whether detector breaks down, wherein, after this indoor set powers on and the compressor of described off-premises station not actuated before, described
Control module is to the inlet temperature of indoor heat exchanger in the current indoor ambient temperature residing for this indoor set, this indoor set and outlet
Temperature judges；If the absolute value of the temperature gap between described inlet temperature and described outlet temperature is less than or equal to the 3rd
The absolute value of temperature threshold and the temperature gap between described current indoor ambient temperature and described inlet temperature is less than or equal to the
The absolute value of four temperature thresholds and the temperature gap between described current indoor ambient temperature and described outlet temperature is less than or equal to
Described 4th temperature threshold, described control module then judge to should indoor set arrange the first to the 3rd temperature detector the most not
Break down.
Further, if the absolute value of the temperature gap between described inlet temperature and described outlet temperature is less than or equal to described
The absolute value of the 3rd temperature threshold and the temperature gap between described current indoor ambient temperature and described inlet temperature is more than institute
The absolute value stating the 4th temperature threshold and the temperature gap between described current indoor ambient temperature and described outlet temperature is more than
Described 4th temperature threshold, described control module then judge to should indoor set arrange the first temperature detector break down；
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature is more than described 3rd temperature threshold and institute
The absolute value stating the temperature gap between current indoor ambient temperature and described inlet temperature is less than or equal to described 4th temperature threshold
The absolute value of value and the temperature gap between described current indoor ambient temperature and described outlet temperature is more than described 4th temperature
Threshold value, described control module then judge to should indoor set arrange the 3rd temperature detector break down；If described entrance
The absolute value of the temperature gap between temperature and described outlet temperature is more than described 3rd temperature threshold and described current indoor ring
The absolute value of the temperature gap between border temperature and described inlet temperature is more than described 4th temperature threshold and described current indoor
The absolute value of the temperature gap between ambient temperature and described outlet temperature is less than or equal to described 4th temperature threshold, described control
Module then judge to should indoor set arrange the second temperature detector break down.
Accompanying drawing explanation
Fig. 1 is the flow chart of the abatement detecting method of indoor set restricting element in multiple on-line system according to embodiments of the present invention.
Fig. 2 is the block diagram of multiple on-line system according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
The inefficacy of indoor set restricting element in the multiple on-line system proposed according to embodiments of the present invention is described with reference to the accompanying drawings
Detection method and multiple on-line system.
Fig. 1 is the flow chart of the abatement detecting method of indoor set restricting element in multiple on-line system according to embodiments of the present invention.
In an embodiment of the present invention, multiple on-line system can include off-premises station and multiple indoor set, and off-premises station includes compressor,
Each indoor set in multiple indoor sets all includes indoor heat exchanger, restricting element and indoor fan.Wherein, restricting element can
Think electric expansion valve.
As it is shown in figure 1, the abatement detecting method of indoor set restricting element comprises the following steps in this multiple on-line system:
S1, at the compressor start of off-premises station and after entering normal operation, if in multiple indoor set at any one indoor set
In refrigeration mode holding state, then control the restricting element in this indoor set and indoor fan is in closed mode.
Specifically, at the compressor start of off-premises station and after entering normal operation, if any one room in multiple indoor set
Interior machine is in refrigeration mode holding state, then the restricting element in this indoor set will be closed, nothing in indoor heat exchanger
Coolant flows through, and whether the restricting element now starting to judge in this indoor set is in failure state.Meanwhile, in order to get rid of indoor
The interference of blower fan, also controls indoor fan in this indoor set and is closed.
It should be noted that in an embodiment of the present invention, if multiple on-line system is non-recovery type heat multiple on-line system, then
Off-premises station in multiple on-line system is in refrigeration mode and time indoor set is in holding state, represents that this indoor set is in refrigeration mould
Formula holding state；If multiple on-line system is recovery type heat multiple on-line system, then it is in refrigeration mode holding state at indoor set
Time, represent that this indoor set is in refrigeration mode holding state.
S2, by should detecting respectively and work as cup residing for this indoor set by the first to the 3rd temperature detector of arranging of indoor set
The inlet temperature of indoor heat exchanger and the outlet temperature of indoor heat exchanger in interior ambient temperature, this indoor set.
Specifically, the current indoor residing for this indoor set can be detected by the first temperature detector being disposed in the interior on machine
Ambient temperature T1, and detect this indoor set by being disposed in the interior the second temperature detector of the porch of indoor heat exchanger in machine
Inlet temperature T2A of middle indoor heat exchanger, and by being disposed in the interior the 3rd temperature in the exit of indoor heat exchanger in machine
Detector detects outlet temperature T2B of indoor heat exchanger in this indoor set.Wherein, the first to the 3rd temperature detector can be
Temperature-sensitive bag, temperature sensor etc..
S3, according to the inlet temperature of indoor heat exchanger in the current indoor ambient temperature residing for this indoor set, this indoor set with go out
Mouth temperature judges whether the restricting element in this indoor set is in failure state.
According to one embodiment of present invention, according to room in current indoor ambient temperature T1 residing for this indoor set, this indoor set
Inlet temperature T2A of interior heat exchanger and outlet temperature T2B judge whether the restricting element in this indoor set is in failure state,
Including: if the absolute value of the temperature gap between inlet temperature T2A and outlet temperature T2B is less than or equal to the first temperature threshold
δ 1 and the temperature gap between current indoor ambient temperature T1 and inlet temperature T2A more than or equal to the second temperature threshold δ 2 and
Temperature gap between current indoor ambient temperature T1 and outlet temperature T2B is more than or equal to the second temperature threshold δ 2, the most tentatively
Judge that the restricting element in this indoor set is in failure state.Wherein, the first temperature threshold δ 1 and the second temperature threshold δ 2 can
To demarcate according to practical situation.
Specifically, when indoor set is in refrigeration mode holding state, the restricting element in this indoor set will be closed,
Now indoor heat exchanger flows through without coolant, it is contemplated that the installation site of the first to the 3rd temperature detector and self deviation,
Now there is T2A ≈ T2B ≈ T1.And when restricting element is in failure state, such as restricting element is not in completely closed state,
Substantial amounts of coolant is when indoor heat exchanger passes through, and owing to indoor fan is closed, indoor heat exchanger lacks heat exchange, this
Shi Huiyou T2A ≈ T2B ＜ T1, i.e. has | T2A-T2B |≤δ 1 and T1-T2A >=δ 2 and T1-T2B >=δ 2.Therefore, by this
Inlet temperature T2A of indoor heat exchanger and outlet temperature T2B in current indoor ambient temperature T1 residing for indoor set, this indoor set
Can effectively judge whether the restricting element in this indoor set is in failure state, find the indoor set under holding state in time
Whether the phenomenon of " stealing coolant " occurs, prevents a large amount of coolant caused because of restricting element inefficacy from flowing through indoor heat exchanger, give
The comfortableness of system, stability and safety cause significant impact, thus have ensured the comfortableness of system, stability and safety
Property, and " step-out " phenomenon of indivedual restricting elements is had role of correcting.
According to one embodiment of present invention, after the restricting element in this indoor set of preliminary judgement is in failure state, also
Control the restricting element in this indoor set and perform flyback action, and after time delay Preset Time, again judge residing for this indoor set
Current indoor ambient temperature T1, inlet temperature T2A of indoor heat exchanger and outlet temperature T2B in this indoor set；If entered
The absolute value of the temperature gap between mouth temperature T2A and outlet temperature T2B is less than or equal to the first temperature threshold δ 1 and works as cup
Temperature gap between interior ambient temperature T1 and inlet temperature TA2 is more than or equal to the second temperature threshold δ 2 and current indoor ring
Temperature gap between border temperature T1 and outlet temperature T2B is more than or equal to the second temperature threshold δ 2, then judge in this indoor set
Restricting element be in failure state.Wherein, Preset Time can be demarcated according to practical situation.
It is to say, for the accuracy improving judgement, the restricting element in this indoor set of preliminary judgement is in failure state
Afterwards, also control the restricting element in this indoor set and perform flyback action, and after N minute, again judge | T2A-T2B |
Whether≤δ 1 and T1-T2A >=δ 2 and T1-T2B >=δ 2 sets up.If set up, then judge that in this indoor set, restricting element is in
Failure state.
According to one embodiment of present invention, before whether the restricting element in judging this indoor set is in failure state, also
Judge to should indoor set arrange the first to the 3rd temperature detector whether break down.
According to one embodiment of present invention, judge to should indoor set arrange the first to the 3rd temperature detector whether send out
During raw fault, including: after this indoor set powers on and the compressor of off-premises station not actuated before, current to residing for this indoor set
In indoor environment temperature T1, this indoor set, inlet temperature T2A and outlet temperature T2B of indoor heat exchanger judge；If
The absolute value of the temperature gap between inlet temperature T2A and outlet temperature T2B is less than or equal to the 3rd temperature threshold δ 3 and current
The absolute value of the temperature gap between indoor environment temperature T1 and inlet temperature T2A less than or equal to the 4th temperature threshold δ 4 and
The absolute value of the temperature gap between current indoor ambient temperature T1 and outlet temperature T2B is less than or equal to the 4th temperature threshold δ 4,
Then judge to should indoor set arrange the first to the 3rd temperature detector all do not break down.
Further, if the absolute value of the temperature gap between inlet temperature T2A and outlet temperature T2B is less than or equal to the 3rd
The absolute value of temperature threshold δ 3 and the temperature gap between current indoor ambient temperature T1 and inlet temperature T2A is more than the 4th
The absolute value of temperature threshold δ 4 and the temperature gap between current indoor ambient temperature T1 and outlet temperature T2B is more than the 4th
Temperature threshold δ 4, then judge to should indoor set arrange the first temperature detector break down；If inlet temperature T2A with
The absolute value of the temperature gap between outlet temperature T2B more than the 3rd temperature threshold δ 3 and current indoor ambient temperature T1 with
The absolute value of the temperature gap between inlet temperature T2A is less than or equal to the 4th temperature threshold δ 4 and current indoor ambient temperature T1
And the absolute value of the temperature gap between outlet temperature T2B is more than the 4th temperature threshold δ 4, then judge arranging by indoor set
The 3rd temperature detector break down；If the absolute value of the temperature gap between inlet temperature T2A and outlet temperature T2B
More than the 3rd temperature threshold δ 3 and the absolute value of the temperature gap between current indoor ambient temperature T1 and inlet temperature T2A
More than the 4th temperature threshold δ 4 and the absolute value of the temperature gap between current indoor ambient temperature T1 and outlet temperature T2B
Less than or equal to the 4th temperature threshold δ 4, then judge breaking down by the second temperature detector of arranging of indoor set.
Specifically, in order to get rid of the interference that the first to the 3rd temperature detector causes, power on and the compression of off-premises station at indoor set
Before machine is not actuated, first the first to the 3rd temperature detector of indoor set is judged.If △ is t1=| T2A-T2B |, △
T2=| T1-T2A |, △ t3=| T1-T2B |, when the first to the 3rd temperature detector is in normal condition, has △ t1 ≈ △ t2
≈ △ t3 ≈ 0, and when the first to the 3rd temperature detector breaks down, above-mentioned equation is false.
It is for instance possible to use the first to the 3rd temperature detector is judged by differential technique, i.e. as △ t1≤δ 3 and △ t2≤δ 4
And during △ t3≤δ 4, it is judged that the first to the 3rd temperature detector does not breaks down；As △ t1≤δ 3 and △ t2 ＞ δ 4 and △ t3
During ＞ δ 4, it is judged that the first temperature detector breaks down；As △ t1 ＞ δ 3 and △ t2≤δ 4 and △ t3 ＞ δ 4, it is judged that the
Three temperature detectors break down；As △ t1 ＞ δ 3 and △ t2 ＞ δ 4 and △ t3≤δ 4, it is judged that the second temperature detector occurs
Fault.Wherein, when judge first to the 3rd temperature detector fault-free time, then use said method in this indoor set throttle
Element judges, thus improves the accuracy of judgement.
The abatement detecting method of indoor set restricting element in multiple on-line system according to embodiments of the present invention, in the compression of off-premises station
After machine starts and enters normal operation, if in multiple indoor set, any one indoor set is in refrigeration mode holding state, then
Control the restricting element in this indoor set and indoor fan be in closed mode, and by should indoor set arrange first
Indoor heat exchanger in the current indoor ambient temperature residing for this indoor set, this indoor set is detected respectively to the 3rd temperature detector
Inlet temperature and the outlet temperature of indoor heat exchanger, and according to the current indoor ambient temperature residing for this indoor set, these indoor
In machine, inlet temperature and the outlet temperature of indoor heat exchanger judge whether the restricting element in this indoor set is in failure state, from
And realize the effective detection to indoor set restricting element, find whether the indoor set under holding state " stealing coolant " occurs in time
Phenomenon, the comfortableness of safeguards system, stability and safety, and hardware cost will not be increased by the method, and right
" step-out " phenomenon of indivedual restricting elements has role of correcting.
Fig. 2 is the block diagram of multiple on-line system according to an embodiment of the invention.As in figure 2 it is shown, this multi-connected machine system
System includes: off-premises station 10, multiple indoor set 20 (only illustrating in figure), corresponding each indoor set 20 arrange first to
3rd temperature detector (first temperature detector the 31, second temperature detector 32 and the 3rd temperature detector 33) and control
Molding block (not specifically illustrated in figure).
Wherein, off-premises station 10 includes that compressor 11, each indoor set 20 in multiple indoor sets 20 all include indoor heat exchanger
21, restricting element 22 and indoor fan 23.First to the 3rd temperature detector is respectively used to detect residing for each indoor set 20
Current indoor ambient temperature T1, inlet temperature T2A of indoor heat exchanger 21 and indoor heat exchanger 21 in each indoor set 20
Outlet temperature T2B.The first to the 3rd temperature detector that control module is arranged with corresponding each indoor set 20 respectively is connected,
Wherein, after the compressor 11 of off-premises station 10 starts and enters normal operation, if any one room in multiple indoor set 20
Interior machine 20 is in refrigeration mode holding state, and control module then controls the restricting element 22 in this indoor set 20 and indoor fan
23 are in closed mode, and according to indoor in current indoor ambient temperature T1 residing for this indoor set 20, this indoor set 20
Inlet temperature T2A of heat exchanger 21 and outlet temperature T2B judge whether the restricting element 22 in this indoor set 20 is in inefficacy
State.
According to one embodiment of present invention, control module according to current indoor ambient temperature T1 residing for this indoor set 20,
In this indoor set 20, inlet temperature T2A and outlet temperature T2B of indoor heat exchanger 21 judge the throttling unit in this indoor set 20
When whether part 22 is in failure state, wherein, if the temperature gap between inlet temperature T2A and outlet temperature T2B is exhausted
To value less than or equal to the first temperature threshold δ 1 and the temperature gap between current indoor ambient temperature T1 and inlet temperature T2A
It is more than more than or equal to the second temperature threshold δ 2 and the temperature gap between current indoor ambient temperature T1 and outlet temperature T2B
Equal to the second temperature threshold δ 2, the restricting element 22 in this indoor set 20 of control module then preliminary judgement is in failure state.
Specifically, when indoor set 20 is in refrigeration mode holding state, the restricting element 22 in this indoor set 20 will be in
Closed mode, now flows through without coolant in indoor heat exchanger 21, it is contemplated that the installation site of the first to the 3rd temperature detector with
And self deviation, now there is T2A ≈ T2B ≈ T1.And when restricting element 22 is in failure state, such as restricting element 22
Being not in completely closed state, substantial amounts of coolant is when indoor heat exchanger 21 passes through, owing to indoor fan 23 is in closedown shape
State, indoor heat exchanger 21 lacks heat exchange, now has T2A ≈ T2B ＜ T1, i.e. has | T2A-T2B |≤δ 1 and T1-T2A >=δ 2
And T1-T2B >=δ 2.Therefore, by indoor heat exchanger in current indoor ambient temperature T1 residing for this indoor set, this indoor set
Inlet temperature T2A and outlet temperature T2B can effectively judge whether the restricting element in this indoor set is in failure state,
Find in time whether the indoor set under holding state the phenomenon of " stealing coolant " occurs, prevent from causing because restricting element lost efficacy
A large amount of coolant flow through indoor heat exchanger, cause significant impact to the comfortableness of system, stability and safety, thus ensure
The comfortableness of system, stability and safety, and " step-out " phenomenon of indivedual restricting elements is had role of correcting.
According to one embodiment of present invention, control module restricting element 22 in this indoor set 20 of preliminary judgement is in mistake
After effect state, also control the restricting element 22 in this indoor set 20 and perform flyback action, and after time delay Preset Time,
Again judge the entrance of indoor heat exchanger 21 in this current indoor ambient temperature T1 residing for indoor set 20, this indoor set 20
Temperature T2A and outlet temperature T2B, and the absolute value of the temperature gap between inlet temperature T2A and outlet temperature T2B is little
In being more than equal to the first temperature threshold δ 1 and the temperature gap between current indoor ambient temperature T1 and inlet temperature T2A
In the second temperature threshold δ 2 and the temperature gap between current indoor ambient temperature T1 and outlet temperature T2B more than or equal to the
During two temperature threshold δ 2, control module judges that the restricting element 22 in this indoor set 20 is in failure state.
It is to say, for the accuracy improving judgement, the restricting element 22 in this indoor set 20 of preliminary judgement is in mistake
After effect state, the restricting element 22 that control module also controls in this indoor set 20 performs flyback action, and after N minute,
Again judge whether | T2A-T2B |≤δ 1 and T1-T2A >=δ 2 and T1-T2B >=δ 2 sets up.If set up, then judge this room
In interior machine 20, restricting element 22 is in failure state.
According to one embodiment of present invention, whether control module restricting element 22 in judging this indoor set 20 is in mistake
Before effect state, also judge to should indoor set 20 arrange the first to the 3rd temperature detector whether break down.
According to one embodiment of present invention, control module judge to should indoor set 20 arrange first to the 3rd temperature inspection
Survey device when whether breaking down, wherein, after this indoor set 20 powers on and the compressor 11 of off-premises station 10 not actuated before, control
Molding block is to the entrance of indoor heat exchanger 21 in current indoor ambient temperature T1 residing for this indoor set 20, this indoor set 20
Temperature T2A and outlet temperature T2B judge；If the temperature gap between inlet temperature T2A and outlet temperature T2B
Absolute value is less than or equal to the 3rd temperature threshold δ 3 and the temperature difference between current indoor ambient temperature T1 and inlet temperature T2A
The absolute value of value is less than or equal to the 4th temperature threshold δ 4 and the temperature between current indoor ambient temperature T1 and outlet temperature T2B
The absolute value of degree difference less than or equal to the 4th temperature threshold δ 4, control module then judge to should indoor set 20 arrange first
All do not break down to the 3rd temperature detector.
Further, if the absolute value of the temperature gap between inlet temperature T2A and outlet temperature T2B is less than or equal to the 3rd
The absolute value of temperature threshold δ 3 and the temperature gap between current indoor ambient temperature T1 and inlet temperature T2A is more than the 4th
The absolute value of temperature threshold δ 4 and the temperature gap between current indoor ambient temperature T1 and outlet temperature T2B is more than the 4th
Temperature threshold δ 4, control module then judge to should indoor set 20 arrange the first temperature detector 31 break down；If
The absolute value of the temperature gap between inlet temperature T2A and outlet temperature T2B is more than the 3rd temperature threshold δ 3 and current indoor
The absolute value of the temperature gap between ambient temperature T1 and inlet temperature T2A is less than or equal to the 4th temperature threshold δ 4 and current
The absolute value of the temperature gap between indoor environment temperature T1 and outlet temperature T2B is more than the 4th temperature threshold δ 4, controls mould
Block then judge to should indoor set 20 arrange the 3rd temperature detector 33 break down；If inlet temperature T2A and outlet
The absolute value of the temperature gap between temperature T2B is more than the 3rd temperature threshold δ 3 and current indoor ambient temperature T1 and entrance
The absolute value of the temperature gap between temperature T2A is more than the 4th temperature threshold δ 4 and current indoor ambient temperature T1 and outlet
The absolute value of the temperature gap between temperature T2B is less than or equal to the 4th temperature threshold δ 4, and control module then judges should be indoor
The second temperature detector 32 that machine 20 is arranged breaks down.
Specifically, in order to get rid of the interference that the first to the 3rd temperature detector causes, power on and off-premises station 10 at indoor set 20
Compressor 11 not actuated before, first the first to the 3rd temperature detector of indoor set 20 is judged.If △
T1=| T2A-T2B |, △ t2=| T1-T2A |, △ t3=| T1-T2B |, when the first to the 3rd temperature detector is in normal condition
Time, there is △ t1 ≈ △ t2 ≈ △ t3 ≈ 0, and when the first to the 3rd temperature detector breaks down, above-mentioned equation is false.
It is for instance possible to use the first to the 3rd temperature detector is judged by differential technique, i.e. as △ t1≤δ 3 and △ t2≤δ 4
And during △ t3≤δ 4, control module judges that the first to the 3rd temperature detector does not breaks down；As △ t1≤δ 3 and △ t2 ＞ δ 4
And during △ t3 ＞ δ 4, control module judges that the first temperature detector 31 breaks down；As △ t1 ＞ δ 3 and △ t2≤δ 4 and △
During t3 ＞ δ 4, control module judges that the 3rd temperature detector 33 breaks down；As △ t1 ＞ δ 3 and △ t2 ＞ δ 4 and △ t3≤δ 4
Time, control module judges that the second temperature detector 32 breaks down.Wherein, when judging the first to the 3rd temperature detector without reason
During barrier, control module uses said method to judge restricting element in this indoor set again, improves the accuracy of judgement.
Multiple on-line system according to embodiments of the present invention, at the compressor start of off-premises station and after entering normal operation, if many
In individual indoor set, any one indoor set is in refrigeration mode holding state, and control module then controls the throttling unit in this indoor set
Part and indoor fan are in closed mode, and according to the current indoor ambient temperature residing for this indoor set of detection, these indoor
In machine, inlet temperature and the outlet temperature of indoor heat exchanger judge whether the restricting element in this indoor set is in failure state, from
And realize the effective detection to indoor set restricting element, find whether the indoor set under holding state " stealing coolant " occurs in time
Phenomenon, the comfortableness of safeguards system, stability and safety, and hardware cost will not be increased by the method, and right
" step-out " phenomenon of indivedual restricting elements has role of correcting.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing "
Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.Common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or
Feature is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term
Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of the most conflicting, ability
The feature of the different embodiments described in this specification or example and different embodiment or example can be entered by the technical staff in territory
Row combines and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (12)
1. the abatement detecting method of indoor set restricting element in a multiple on-line system, it is characterised in that described multiple on-line system
Including off-premises station and multiple indoor set, described off-premises station includes compressor, and each indoor set in the plurality of indoor set all wraps
Include indoor heat exchanger, restricting element and indoor fan, said method comprising the steps of:
At the compressor start of described off-premises station and after entering normal operation, if any one is indoor in the plurality of indoor set
Machine is in refrigeration mode holding state, then control the restricting element in this indoor set and indoor fan is in closed mode；
By to should indoor set arrange the first to the 3rd temperature detector detect the current indoor ring residing for this indoor set respectively
The inlet temperature of indoor heat exchanger and the outlet temperature of indoor heat exchanger in border temperature, this indoor set；And
Warm according to inlet temperature and the outlet of indoor heat exchanger in the current indoor ambient temperature residing for this indoor set, this indoor set
Degree judges whether the restricting element in this indoor set is in failure state.
The abatement detecting method of indoor set restricting element in multiple on-line system the most according to claim 1, it is characterised in that
Described warm according to inlet temperature and the outlet of indoor heat exchanger in the current indoor ambient temperature residing for this indoor set, this indoor set
Degree judges whether the restricting element in this indoor set is in failure state, including:
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature less than or equal to the first temperature threshold,
And the temperature gap between described current indoor ambient temperature and described inlet temperature is more than or equal to the second temperature threshold and described
Temperature gap between current indoor ambient temperature and described outlet temperature is more than or equal to described second temperature threshold, the most tentatively sentences
Restricting element in this indoor set fixed is in failure state.
The abatement detecting method of indoor set restricting element in multiple on-line system the most according to claim 2, it is characterised in that
After restricting element in this indoor set of preliminary judgement is in failure state,
Also control the restricting element in this indoor set and perform flyback action, and after time delay Preset Time, again judge these indoor
The inlet temperature of indoor heat exchanger and outlet temperature in current indoor ambient temperature residing for machine, this indoor set；
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature is less than or equal to described first temperature threshold
Value and temperature gap between described current indoor ambient temperature and described inlet temperature more than or equal to described second temperature threshold,
And the temperature gap between described current indoor ambient temperature and described outlet temperature is more than or equal to described second temperature threshold, then
Judge that the restricting element in this indoor set is in failure state.
4. according to the abatement detecting method of indoor set restricting element in the multiple on-line system according to any one of claim 1-3,
It is characterized in that, before whether the restricting element judged in this indoor set is in failure state, also judge should indoor set
Whether the first to the 3rd temperature detector arranged breaks down.
The abatement detecting method of indoor set restricting element in multiple on-line system the most according to claim 4, it is characterised in that
Described judgement to should indoor set arrange the first to the 3rd temperature detector whether break down, including:
After this indoor set powers on and the compressor of described off-premises station not actuated before, to the current indoor environment residing for this indoor set
In temperature, this indoor set, inlet temperature and the outlet temperature of indoor heat exchanger judge；
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature less than or equal to the 3rd temperature threshold,
And the absolute value of the temperature gap between described current indoor ambient temperature and described inlet temperature is less than or equal to the 4th temperature threshold
The absolute value of value and the temperature gap between described current indoor ambient temperature and described outlet temperature is less than or equal to the described 4th
Temperature threshold, then judge to should indoor set arrange the first to the 3rd temperature detector all do not break down.
The abatement detecting method of indoor set restricting element in multiple on-line system the most according to claim 5, it is characterised in that
Also include:
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature is less than or equal to described 3rd temperature threshold
The absolute value of value and the temperature gap between described current indoor ambient temperature and described inlet temperature is more than described 4th temperature
The absolute value of threshold value and the temperature gap between described current indoor ambient temperature and described outlet temperature is more than described 4th temperature
Degree threshold value, then judge to should indoor set arrange the first temperature detector break down；
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature more than described 3rd temperature threshold,
And the absolute value of the temperature gap between described current indoor ambient temperature and described inlet temperature is less than or equal to described 4th temperature
The absolute value of threshold value and the temperature gap between described current indoor ambient temperature and described outlet temperature is more than described 4th temperature
Degree threshold value, then judge to should indoor set arrange the 3rd temperature detector break down；
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature more than described 3rd temperature threshold,
And the absolute value of the temperature gap between described current indoor ambient temperature and described inlet temperature is more than described 4th temperature threshold
The absolute value of value and the temperature gap between described current indoor ambient temperature and described outlet temperature is less than or equal to the described 4th
Temperature threshold, then judge to should indoor set arrange the second temperature detector break down.
7. a multiple on-line system, it is characterised in that including:
Off-premises station, described off-premises station includes compressor；
Multiple indoor sets, each indoor set in the plurality of indoor set all includes indoor heat exchanger, restricting element and indoor wind
Machine；
The first to the 3rd temperature detector that corresponding each indoor set is arranged, described first to the 3rd temperature detector is respectively used to
Inlet temperature and the indoor of detecting indoor heat exchanger in the current indoor ambient temperature residing for each indoor set, each indoor set are changed
The outlet temperature of hot device；And
Control module, the first to the 3rd temperature detector that described control module is arranged with corresponding each indoor set respectively is connected,
Wherein, at the compressor start of described off-premises station and after entering normal operation, if any one room in the plurality of indoor set
Interior machine is in refrigeration mode holding state, and described control module then controls the restricting element in this indoor set and indoor fan is all located
In closed mode, and according to the entrance temperature of indoor heat exchanger in the current indoor ambient temperature residing for this indoor set, this indoor set
Degree and outlet temperature judge whether the restricting element in this indoor set is in failure state.
Multiple on-line system the most according to claim 7, it is characterised in that described control module is according to this indoor set institute
In the current indoor ambient temperature at place, this indoor set, inlet temperature and the outlet temperature of indoor heat exchanger judge in this indoor set
When whether restricting element is in failure state, wherein,
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature less than or equal to the first temperature threshold,
And the temperature gap between described current indoor ambient temperature and described inlet temperature is more than or equal to the second temperature threshold and described
Temperature gap between current indoor ambient temperature and described outlet temperature is more than or equal to described second temperature threshold, described control
Restricting element in module this indoor set of then preliminary judgement is in failure state.
Multiple on-line system the most according to claim 8, it is characterised in that described control module is in these indoor of preliminary judgement
After restricting element in machine is in failure state, also controls the restricting element in this indoor set and perform flyback action, and prolonging
Time Preset Time after, again judge entering of indoor heat exchanger in the current indoor ambient temperature residing for this indoor set, this indoor set
Mouthful temperature and outlet temperature, and the absolute value of the temperature gap between described inlet temperature and described outlet temperature is less than or equal to
Described first temperature threshold and the temperature gap between described current indoor ambient temperature and described inlet temperature are more than or equal to institute
State the second temperature threshold and the temperature gap between described current indoor ambient temperature and described outlet temperature more than or equal to described
During the second temperature threshold, described control module judges that the restricting element in this indoor set is in failure state.
10. according to the multiple on-line system according to any one of claim 7-9, it is characterised in that described control module is being sentenced
Before whether the restricting element in this indoor set fixed is in failure state, also judge to should indoor set arrange first to the 3rd
Whether temperature detector breaks down.
11. multiple on-line system according to claim 10, it is characterised in that described control module is judging should room
When whether the first to the 3rd temperature detector that interior machine is arranged breaks down, wherein,
After this indoor set powers on and the compressor of described off-premises station not actuated before, described control module is to residing for this indoor set
In current indoor ambient temperature, this indoor set, inlet temperature and the outlet temperature of indoor heat exchanger judge；
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature less than or equal to the 3rd temperature threshold,
And the absolute value of the temperature gap between described current indoor ambient temperature and described inlet temperature is less than or equal to the 4th temperature threshold
The absolute value of value and the temperature gap between described current indoor ambient temperature and described outlet temperature is less than or equal to the described 4th
Temperature threshold, described control module then judge to should indoor set arrange the first to the 3rd temperature detector all do not break down.
12. multiple on-line system according to claim 11, it is characterised in that
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature is less than or equal to described 3rd temperature threshold
The absolute value of value and the temperature gap between described current indoor ambient temperature and described inlet temperature is more than described 4th temperature
The absolute value of threshold value and the temperature gap between described current indoor ambient temperature and described outlet temperature is more than described 4th temperature
Degree threshold value, described control module then judge to should indoor set arrange the first temperature detector break down；
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature more than described 3rd temperature threshold,
And the absolute value of the temperature gap between described current indoor ambient temperature and described inlet temperature is less than or equal to described 4th temperature
The absolute value of threshold value and the temperature gap between described current indoor ambient temperature and described outlet temperature is more than described 4th temperature
Degree threshold value, described control module then judge to should indoor set arrange the 3rd temperature detector break down；
If the absolute value of the temperature gap between described inlet temperature and described outlet temperature more than described 3rd temperature threshold,
And the absolute value of the temperature gap between described current indoor ambient temperature and described inlet temperature is more than described 4th temperature threshold
The absolute value of value and the temperature gap between described current indoor ambient temperature and described outlet temperature is less than or equal to the described 4th
Temperature threshold, described control module then judge to should indoor set arrange the second temperature detector break down.
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