CN109028456A - A kind of leakage detection method and device of refrigerant - Google Patents
A kind of leakage detection method and device of refrigerant Download PDFInfo
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- CN109028456A CN109028456A CN201811002806.9A CN201811002806A CN109028456A CN 109028456 A CN109028456 A CN 109028456A CN 201811002806 A CN201811002806 A CN 201811002806A CN 109028456 A CN109028456 A CN 109028456A
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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
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- 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
- F24F11/64—Electronic processing using pre-stored data
-
- 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
Abstract
The invention discloses a kind of leakage detection method of refrigerant and devices, are related to fixed speed air conditioner field, for judging the leakage situation of refrigerant in constant speed air-conditioning to avoid security risk in time.This method comprises: obtaining constant speed air-conditioning current indoor heat transfer temperature difference value △ T_in (t) and compressor current I (t)；Determine that the current leakiness of refrigerant, the current leakiness of refrigerant include that refrigerant currently leaks completely, refrigerant is currently at slow leak condition, refrigerant is currently at fast leak state according to indoor heat transfer temperature difference value △ T_in (t) and compressor current I (t)；The prompt information of terminal is converted by the current leakiness of determining refrigerant and controls whether the constant speed air-conditioning continues to run according to the difference of the current leakiness of refrigerant.The embodiment of the present invention is applied to constant speed detection of air-conditioning.
Description
Technical field
The present invention relates to fixed speed air conditioner technical field more particularly to the leakage detection methods and device of a kind of refrigerant.
Background technique
Constant speed air-conditioning on current market all uses R32 refrigerant, and R32 refrigerant is combustible refrigerant, corresponding compressor
Lubricating oil is flammable lubricating oil, once refrigerant leakage occurs, there are two big hidden danger: one is R32 refrigerant side or room indoors
Aggregation in outer box body, concentration rise, stop operation of air conditioner not in time, if encountering electric spark, be also easy to produce hidden peril of explosion；Two be system
Cryogen leakage then illustrates that air conditioning pipe system has leak source or operation of air conditioner to split in the process since pressure or vibration cause pipeline.
After refrigerant has leaked, compressor remains in operation, and generates negative pressure, enters air (or oxygen) in air-conditioning system, compressor winding
It is steeply risen because no refrigerant is cooling, vaporizes lubricating oil at high temperature, encountering electric spark at this time also has the hidden of initiation explosion
Suffer from.
Consider from a safety viewpoint, air conditioner must do leak protection, and the first step of leak protection is how accurately
Detect whether refrigerant leaks, since indoor unit belongs to opened loop control to outdoor unit, and outdoor temperature is raised and lowered
Also it will affect judging result, therefore the probability that detection method in the prior art is failed to judge or judged by accident is very big.
Summary of the invention
The embodiment of the present invention provides the leakage detection method and device of a kind of refrigerant, right in the prior art for solving
What whether refrigerant leaked judges not accurate enough technical problem.
To achieve the purpose that solve above-mentioned technical problem, the embodiment of the present invention is adopted the following technical scheme that
In a first aspect, the embodiment provides a kind of leakage detection methods of refrigerant, this method comprises:
Obtain the constant speed air-conditioning current indoor heat transfer temperature difference value △ T_in (t) and compressor current I (t), the room
Interior heat transfer temperature difference value △ T_in (t) be equal to inner ring temperature sensor detected value Ta and inner disc temperature sensor detected value Tn it
Between difference；
Determine that refrigerant is current according to the interior heat transfer temperature difference value △ T_in (t) and the compressor current I (t)
Leakiness, the current leakiness of the refrigerant include that currently leakage, refrigerant are currently at and slowly let out refrigerant completely
Leakage state, refrigerant are currently at fast leak state；
The prompt information of terminal is converted by the current leakiness of the determining refrigerant and according to the refrigerant
The difference of current leakiness controls whether the constant speed air-conditioning continues to run.
Second aspect, the embodiment provides a kind of leak detecting device of refrigerant, which includes:
Module is obtained, it is electromechanical for obtaining the constant speed air-conditioning current indoor heat transfer temperature difference value △ T_in (t) and compression
It flows I (t), the interior heat transfer temperature difference value △ T_in (t) is equal to the detected value Ta and inner disc temperature sensing of inner ring temperature sensor
Difference between the detected value Tn of device；
Judgment module, for true according to the interior heat transfer temperature difference value △ T_in (t) and the compressor current I (t)
The current leakiness of cryogen is customized, the current leakiness of the refrigerant includes refrigerant currently leakage, refrigerant completely
It is currently at slow leak condition, refrigerant is currently at fast leak state；
Execution module, for converting the current leakiness of the refrigerant determined to the prompt information and root of terminal
Control whether the constant speed air-conditioning continues to run according to the difference of the current leakiness of the refrigerant.
The third aspect, provides a kind of computer readable storage medium for storing one or more programs, it is one or
Multiple programs include instruction, and described instruction makes the refrigeration of the computer execution as described in relation to the first aspect when executed by a computer
The leakage detection method of agent.
The leakage detection method and device for a kind of refrigerant that the embodiment of the present invention provides, by being let out to refrigerant difference
The analysis of leakage state regard indoor heat transfer temperature difference value △ T_in (t) and compressor current I (t) as parameter, normal with refrigerant
The current leakage situation of the more available refrigerant of △ T_in (t) and I (t) under state is let out according to refrigerant is different
A possibility that leakage situation formulates corresponding judgment basis, avoids misjudgement and fails to judge.
Fourth aspect provides a kind of computer program product comprising instruction, when described instruction is run on computers
When, so that computer executes the leakage detection method of refrigerant as described in relation to the first aspect.
5th aspect, provides a kind of leak detecting device of refrigerant, comprising: processor and memory, memory are used for
Program is stored, processor calls the program of memory storage, to execute the leak detection of refrigerant described in above-mentioned first aspect
Method.
Detailed description of the invention
Fig. 1 is a kind of leakage detection method flow diagram for air-conditioning refrigerant that the embodiment of the present invention provides；
Fig. 2 is heat transfer temperature difference value, compressor current in room when the refrigerant that provides of the embodiment of the present invention does not leak
The tendency schematic diagram changed over time with compressor top temperature；
Fig. 3 be heat transfer temperature difference value in room when the refrigerant that provides of the embodiment of the present invention leak completely, compressor current and
The tendency schematic diagram that compressor top temperature changes over time；
Fig. 4 is heat transfer temperature difference value in room when the refrigerant that provides of the embodiment of the present invention be in slow leak condition, compresses
The tendency schematic diagram that electromechanics stream is changed over time with compressor top temperature；
Fig. 5 is heat transfer temperature difference value in room when the refrigerant that provides of the embodiment of the present invention be in fast leak state, compresses
The tendency schematic diagram that electromechanics stream is changed over time with compressor top temperature；
When Fig. 6 is that the air-conditioning refrigerant that the embodiment of the present invention provides is in slow leak condition and complete leak condition
Leakage detection method flow diagram；
Fig. 7 is the leakage detection method stream when air-conditioning refrigerant that the embodiment of the present invention provides is in fast leak state
Journey schematic diagram；
Fig. 8 is a kind of leak detecting device schematic diagram for air-conditioning refrigerant that the embodiment of the present invention provides.
Specific embodiment
With reference to the accompanying drawing, the embodiment of the present invention is described.
Referring to fig. 1, the embodiment of the invention provides a kind of leakage detection method of refrigerant, this method includes step
Rapid S100-S300:
S100, acquisition constant speed air-conditioning current indoor heat transfer temperature difference value △ T_in (t) and compressor current I (t), interior are changed
Hot temperature difference △ T_in (t) is equal between the detected value Ta of inner ring temperature sensor and the detected value Tn of inner disc temperature sensor
Difference.
Constant speed air-conditioning includes indoor unit and outdoor unit, and the inner ring temperature sensor positioned at indoor unit air inlet is for detecting
Room temperature, the inner disc temperature sensor in the middle part of indoor set heat exchanger is for detecting indoor unit tube temperature.If the inner ring temperature
The detected value of sensor is Ta, and the detected value of the inner disc temperature sensor is Tn.When the constant speed air-conditioning is in refrigeration mode, room
Interior heat transfer temperature difference value △ T_in (t)=Ta-Tn, when the constant speed air-conditioning is in heating mode, indoor heat transfer temperature difference value △ T_in
(t)=Tn-Ta.The compressor current of compressor current detection circuit detection on indoor unit master control borad is I (t).From indoor unit
It has been powered on to outdoor unit, the value of Ta, Tn and an I (t) was just detected every 2-10 minutes, and calculated indoor heat transfer temperature difference value △
T_in (t), outdoor unit power-off and constant speed air-conditioning heating need not detections during defrosting.
S200, it determines that refrigerant is current according to indoor heat transfer temperature difference value △ T_in (t) and compressor current I (t) and lets out
Leakage degree, the current leakiness of refrigerant include refrigerant currently completely leakage, refrigerant be currently at slow leak condition,
Refrigerant is currently at fast leak state.
With reference to Fig. 2, curve x indicates that heat transfer temperature difference value △ T_in (t) is changed over time in room when refrigerant does not leak
Tendency, curve y indicates the refrigerant tendency that compressor current I (t) is changed over time when not leaking, and curve z indicates system
When cryogen does not leak, the tendency that changes over time of compressor top temperature when constant speed air-conditioning inner compressor works normally.It is logical
Curve in figure is crossed it is found that not leaking when refrigerant, compressor protector generally will not tripping when, indoor heat transfer temperature difference value △
T_in (t) and compressor current I (t) is maintained on a stable normal value.
With reference to Fig. 3, after refrigerant leaks, compressor protector will start overheating protection, therefore compressor protection
Device tripping, compressor top temperature reduce, and drop to the threshold value of overheating protection hereinafter, compressor then wakes up, temperature rises again
It is high.If the refrigerant in constant speed air-conditioning leaks completely, curve x indicate current state under interior heat transfer temperature difference value △ T_in (t) with
The tendency of time change, curve y indicate the tendency that compressor current I (t) is changed over time under current state, and curve z expression is worked as
The tendency that compressor head temperature changes over time under preceding state.By curve in figure it is found that no matter compressor protector whether
Tripping, indoor heat transfer temperature difference value △ T_in (t) can all be in very low state for a long time, and the value of compressor current I (t) is being pressed
Also very little during contracting machine is run, is reduced to 0 during compressor protector tripping.
With reference to Fig. 4, if the refrigerant in constant speed air-conditioning is currently at slow leak condition, curve x is indicated under current state
The tendency that indoor heat transfer temperature difference value △ T_in (t) changes over time, curve y indicate that compressor current I (t) is at any time under current state
Between the tendency that changes, curve z indicates the tendency that compressor top temperature changes over time.By curve in figure it is found that interior is changed
Apparent variation, indoor heat transfer temperature difference value △ T_in (t) will not occur in a short time for the peak value of hot temperature difference △ T_in (t)
And compressor current I (t) changes according to whether compressor runs, and the maximum value of compressor top temperature is in short-term
It is interior to change.
With reference to Fig. 5, if the refrigerant in constant speed air-conditioning is currently at fast leak state, curve x is indicated under current state
The tendency that indoor heat transfer temperature difference value △ T_in (t) changes over time, curve y indicate that compressor current I (t) is at any time under current state
Between the tendency that changes, curve z indicates the tendency that compressor top temperature changes over time.By curve in figure it is found that with system
The leakage of cryogen, when compressor works normally, the peak value of compressor top temperature can be gradually risen, indoor heat transfer temperature difference value △
The peak value of T_in (t) and compressor current I (t) can gradually decrease.
The constant speed air-conditioning current indoor heat transfer temperature difference value △ T_in (t) and compressor current I are obtained by step S100
(t).Indoor heat transfer temperature difference value △ T_in (t) and compressor current when referring to above-mentioned constant speed air-conditioning inner refrigerant different conditions
The tendency schematic diagram of I (t).
When constant speed air-conditioning is in refrigeration mode:
Referring to Fig. 6, step S200 includes step S211-S214b:
S211, interior heat transfer temperature difference value △ T_in (t) and compressor current I (t) under the present situation is recorded first.
S212a, indoor heat transfer temperature difference value △ T_in (t) is made comparisons with first threshold, judges whether △ T_in (t)≤the
One threshold value and I1*a%≤I (t)≤I1*b% then follow the steps S212b if so then execute step S213a if not.Wherein I1 is
Compressor current setting value under refrigeration mode, a, b are proportionality coefficient.
S213a, control outdoor unit are out of service, and count is incremented for counter, and guard time restarts the outdoor unit later, continue
Execute step S214a.
S212b, judge whether first threshold < △ T_in (t) < second threshold, if so, thening follow the steps S213b.
Count is incremented for S213b, counter, continues to execute step S214b.
S214a, when judging whether the count value of counter reaches the first threshold T h1, if then determining that refrigerant is current
Leakage completely.
S214b, judge whether the count value of counter reaches the second threshold T h2, and detect compressor at least once
Electric current I (t)=0, if then determining that refrigerant is currently at slow leak condition.
Referring to Fig. 7, step S200 further includes step S221-S225:
S221, interior heat transfer temperature difference value △ T_in (t) and compressor current I (t) under the present situation is recorded first.
S222, judge whether first threshold≤△ T_in (t)≤second threshold, if so, note △ T_in (t) is △ T_in
(j), I (t) is I (j), and j is the new counting serial number met under the conditions of " first threshold < △ T_in (t) < second threshold ", after
It is continuous to execute step S223.
S223, judge whether △ T_in (j)-△ T_in (j+n) >=third threshold value and I (j)-I (j+n) >=I1*c%, n are
Natural number not less than 1, c are proportionality coefficient.
S224, if so, control outdoor unit is out of service, guard time restarts the outdoor unit later.
S225, record indoor heat transfer temperature difference value △ T_in (t) at this time and compressor current I (t), judge whether △ T_
In (t)≤first threshold and I1*a%≤I (t)≤I1*b%, if so, determining that refrigerant is currently at fast leak state.
Wherein the value range of the first threshold is [0,5], the value range [8,15] of the second threshold, the third threshold value
Value range be [5,10], the value range of first threshold T h1 is [2,4], the value range of second threshold T h2
For [2,4], the value range of a is [2,10], and the value range of b is [10,40], and the value range of c is [10,60].It is above-mentioned to take
The parameter value for being worth range is experiment the data obtained.
It can similarly obtain, when constant speed air-conditioning is in heating mode:
If the threshold value of △ T_in (t)≤the 4th and I2*a%≤I (t)≤I2*b%, it is out of service to control outdoor unit, protection
Time restarts the outdoor unit later, and count is incremented for counter, when the counting of the counter reaches the first threshold T h1, it is determined that
Refrigerant currently leaks completely, and I2 is compressor current setting value under heating mode.
If the 5th threshold value of the 4th threshold value < △ T_in (t) <, count is incremented for counter, when the counting of the counter reaches
When to the second threshold T h2, and I (t)=0 is detected at least once, it is determined that refrigerant is currently at slow leak condition.
If the 5th threshold value of the 4th threshold value < △ T_in (t) <, remember that △ T_in (t) is △ T_in (j), if △ T_in (j)-
△ T_in (j+n) >=the 6th threshold value and I (j)-I (j+n) >=I2*c%, then it is out of service to control outdoor unit, after guard time
The outdoor unit is restarted, if the threshold value of △ T_in (t)≤the 4th and I2*a%≤I (t)≤I2*b% at this time, it is determined that refrigerant is current
In fast leak state, j is the new counting serial number met under the conditions of " the 5th threshold value of the 4th threshold value < △ T_in (t) < ", n
For the natural number not less than 1.
Wherein the value range of the 4th threshold value is [0,10], and the value range of the 5th threshold value is [15,20], the 6th
The value range of threshold value is [5,12], and the value range of first threshold T h1 is [2,4], the value of second threshold T h2
Range is [2,4], and the value range of a is [2,10], and the value range of b is [10,40], and the value range of c is [10,60].On
The parameter value of value range is stated as experiment the data obtained.
S300, the prompt information of terminal is converted by the current leakiness of determining refrigerant and is worked as according to the refrigerant
Whether the different control constant speed air-conditionings of preceding leakiness continue to run.
The current leakiness of refrigerant has been determined by step S200, when determining that refrigerant currently leaks completely, control
Make the constant speed air-conditioning is out of service, while controlling terminal shows the prompt information that refrigerant leaks completely.When determining that refrigerant works as
It is preceding when being in slow leak condition, control the constant speed air-conditioning maintenance operating status, while controlling terminal is shown at refrigerant
In the prompt information of slow leak condition.When determining that refrigerant is currently at fast leak state, controls the constant speed air-conditioning and stop
It only runs, while controlling terminal shows that refrigerant is in the prompt information of fast leak state.
The leakage detection method of a kind of refrigerant provided in this embodiment, by dividing refrigerant difference leak condition
Analysis, by indoor heat transfer temperature difference value △ T_in (t) and compressor current I (t) as the △ under parameter, with refrigerant normal condition
The current leakage situation of the more available refrigerant of T_in (t) and I (t), the leakage situation different according to refrigerant are formulated
Corresponding judgment basis, a possibility that avoiding misjudgement and fail to judge.
Refering to what is shown in Fig. 8, the embodiment provides a kind of leak detecting device of refrigerant, can be applied to as
Shown on refrigerant leakage detection method.The leak detecting device of the refrigerant includes:
Module 100 is obtained, it is electromechanical for obtaining the constant speed air-conditioning current indoor heat transfer temperature difference value △ T_in (t) and compression
It flows I (t), which is equal to the detected value Ta and inner disc temperature sensor of inner ring temperature sensor
Detected value Tn between difference.
Judgment module 200, for determining refrigeration according to indoor heat transfer temperature difference value △ T_in (t) and compressor current I (t)
The current leakiness of agent, the current leakiness of refrigerant include refrigerant currently completely leakage, refrigerant be currently at it is slow
Slow leak condition, refrigerant are currently at fast leak state.
Further, when constant speed air-conditioning is in refrigeration mode, which is used for:
If △ T_in (t)≤first threshold and I1*a%≤I (t)≤I1*b%, it is out of service to control outdoor unit, protection
Time restarts the outdoor unit later, and count is incremented for counter, when the counting of the counter reaches the first threshold T h1, it is determined that
Refrigerant currently leaks completely, and I1 is compressor current setting value under refrigeration mode, and a, b are proportionality coefficient.
If first threshold < △ T_in (t) < second threshold, count is incremented for counter, when the counting of the counter reaches
Second threshold T h2, and I (t)=0 is detected at least once, it is determined that refrigerant is currently at slow leak condition.
If first threshold < △ T_in (t) < second threshold, remember that △ T_in (t) is △ T_in (j), if △ T_in (j)-
△ T_in (j+n) >=third threshold value and I (j)-I (j+n) >=I1*c%, then it is out of service to control outdoor unit, after guard time
The outdoor unit is restarted, if △ T_in (t)≤first threshold and I1*a%≤I (t)≤I1*b% at this time, it is determined that refrigerant is current
In fast leak state, j is the new counting serial number met under the conditions of " first threshold < △ T_in (t) < second threshold ", n
For the natural number not less than 1, c is proportionality coefficient.
When constant speed air-conditioning is in heating mode, which is used for:
If the threshold value of △ T_in (t)≤the 4th and I2*a%≤I (t)≤I2*b%, it is out of service to control outdoor unit, protection
Time restarts the outdoor unit later, and count is incremented for counter, when the counting of the counter reaches the first threshold T h1, it is determined that
Refrigerant currently leaks completely, and I2 is compressor current setting value under heating mode.
If the 5th threshold value of the 4th threshold value < △ T_in (t) <, count is incremented for counter, when the counting of the counter reaches
When the second threshold T h2, and I (t)=0 is detected at least once, it is determined that refrigerant is currently at slow leak condition.
If the 5th threshold value of the 4th threshold value < △ T_in (t) <, remember that △ T_in (t) is △ T_in (j), if △ T_in (j)-
△ T_in (j+n) >=the 6th threshold value and I (j)-I (j+n) >=I2*c%, then it is out of service to control outdoor unit, after guard time
The outdoor unit is restarted, if the threshold value of △ T_in (t)≤the 4th and I2*a%≤I (t)≤I2*b% at this time, it is determined that refrigerant is current
In fast leak state, j is the new counting serial number met under the conditions of " the 5th threshold value of the 4th threshold value < △ T_in (t) < ", n
For the natural number not less than 1.
Execution module 300, for converting the current leakiness of the refrigerant determined to the prompt information and root of terminal
Whether continued to run according to the different control constant speed air-conditionings of the current leakiness of refrigerant.
The execution module 300 is used for:
When determining that refrigerant currently leaks completely, it is out of service to control the constant speed air-conditioning, while controlling terminal display is made
The prompt information that cryogen leaks completely.
When determining that refrigerant is currently at slow leak condition, the constant speed air-conditioning maintenance operating status is controlled, together
When controlling terminal show that refrigerant is in the prompt information of slow leak condition.
When determining that refrigerant is currently at fast leak state, it is out of service to control the constant speed air-conditioning, while controlling end
End display refrigerant is in the prompt information of fast leak state.
The embodiment of the present invention provides a kind of computer readable storage medium for storing one or more programs, one
Or multiple programs include instruction, described instruction executes computer as described in Fig. 1 and Fig. 6-Fig. 7
Refrigerant leakage detection method.
The embodiment of the present invention provides a kind of computer program product comprising instruction, when instruction is run on computers
When, so that computer executes the leakage detection method of the refrigerant as described in Fig. 1 and Fig. 6-Fig. 7.
The embodiment of the present invention provides a kind of leak detecting device of refrigerant, comprising: processor and memory, memory
For storing program, processor calls the program of memory storage, to execute the refrigerant as described in Fig. 1 and Fig. 6-Fig. 7
Leakage detection method.
By the leak detecting device, computer readable storage medium, computer of refrigerant in an embodiment of the present invention
Program product can be applied to the above method, therefore, can be obtained technical effect see also above method embodiment, originally
Details are not described herein for inventive embodiments.
It should be noted that above-mentioned each unit can be the processor individually set up, also can integrate controller certain
It is realized in one processor, in addition it is also possible to be stored in the form of program code in the memory of controller, by controller
Some processor calls and executes the function of the above each unit.Processor described here can be a central processing unit
(Central Processing Unit, CPU) or specific integrated circuit (Application Specific
Integrated Circuit, ASIC), or be arranged to implement one or more integrated circuits of the embodiment of the present invention.
It should be understood that in various embodiments of the present invention, magnitude of the sequence numbers of the above procedures are not meant to execute suitable
Sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present invention
Process constitutes any restriction.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided by the present invention, it should be understood that disclosed system, apparatus and method, it can be with
It realizes by another way.For example, apparatus embodiments described above are merely indicative, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of equipment or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
Claims (11)
1. a kind of leakage detection method of refrigerant, which is characterized in that be used for constant speed air-conditioning, comprising:
The constant speed air-conditioning current indoor heat transfer temperature difference value △ T_in (t) and compressor current I (t) are obtained, the interior is changed
Hot temperature difference △ T_in (t) is equal between the detected value Ta of inner ring temperature sensor and the detected value Tn of inner disc temperature sensor
Difference；
The current leakage of refrigerant is determined according to the interior heat transfer temperature difference value △ T_in (t) and the compressor current I (t)
Degree, the current leakiness of the refrigerant include that currently leakage, refrigerant are currently at slowly leakage shape to refrigerant completely
State, refrigerant are currently at fast leak state；
By the current leakiness of the determining refrigerant be converted into the prompt information of terminal and according to the refrigerant it is current
The difference of leakiness control whether the constant speed air-conditioning continues to run.
2. the leakage detection method of refrigerant according to claim 1, which is characterized in that when air-conditioning is in refrigeration mode,
It is described that the current leakage of refrigerant is determined according to the interior heat transfer temperature difference value △ T_in (t) and the compressor current I (t)
Degree, comprising:
If △ T_in (t)≤first threshold and I1*a%≤I (t)≤I1*b%, it is out of service to control outdoor unit, guard time
Later restart the outdoor unit, count is incremented for counter, when the counting of the counter reaches the first threshold T h1, it is determined that
Refrigerant currently leaks completely, and the I1 is compressor current setting value under refrigeration mode, and a, b are proportionality coefficient；
If first threshold < △ T_in (t) < second threshold, count is incremented for counter, when the counting of the counter reaches
Two threshold T h2, and I (t)=0 is detected at least once, it is determined that refrigerant is currently at slow leak condition；
If first threshold < △ T_in (t) < second threshold, remember that △ T_in (t) is △ T_in (j), if △ T_in (j)-△ T_
In (j+n) >=third threshold value and I (j)-I (j+n) >=I1*c%, then it is out of service to control outdoor unit, and guard time is restarted later
The outdoor unit, if △ T_in (t)≤first threshold and I1*a%≤I (t)≤I1*b% at this time, it is determined that refrigerant is currently located
In fast leak state, j is the new counting serial number met under the conditions of " first threshold < △ T_in (t) < second threshold ", and n is
Natural number not less than 1, c are proportionality coefficient.
3. the leakage detection method of refrigerant according to claim 1, which is characterized in that when air-conditioning is in heating mode,
It is described that the current leakage of refrigerant is determined according to the interior heat transfer temperature difference value △ T_in (t) and the compressor current I (t)
Degree, comprising:
If the threshold value of △ T_in (t)≤the 4th and I2*a%≤I (t)≤I2*b%, it is out of service to control outdoor unit, guard time
Later restart the outdoor unit, count is incremented for counter, when the counting of the counter reaches the first threshold T h1, it is determined that
Refrigerant currently leaks completely, and the I2 is compressor current setting value under heating mode；
If the 5th threshold value of the 4th threshold value < △ T_in (t) <, count is incremented for counter, when the counting of the counter reaches
When two threshold T h2, and I (t)=0 is detected at least once, it is determined that refrigerant is currently at slow leak condition；
If the 5th threshold value of the 4th threshold value < △ T_in (t) <, remember that △ T_in (t) is △ T_in (j), if △ T_in (j)-△ T_
In (j+n) >=the 6th threshold value and I (j)-I (j+n) >=I2*c%, then it is out of service to control outdoor unit, and guard time is restarted later
The outdoor unit, if the threshold value of △ T_in (t)≤the 4th and I2*a%≤I (t)≤I2*b% at this time, it is determined that refrigerant is currently located
In fast leak state, j is the new counting serial number met under the conditions of " the 5th threshold value of the 4th threshold value < △ T_in (t) < ", and n is
Natural number not less than 1.
4. the leakage detection method of refrigerant according to claim 1, which is characterized in that described by the determining refrigerant
Current leakiness is converted into the prompt information of terminal and the different control institutes according to the current leakiness of the refrigerant
It states constant speed air-conditioning and whether continues to run and include:
When determining that refrigerant currently leaks completely, it is out of service to control the constant speed air-conditioning, while controlling terminal display is freezed
The prompt information that agent leaks completely；
When determining that refrigerant is currently at slow leak condition, the constant speed air-conditioning maintenance operating status is controlled, simultaneously
Controlling terminal shows that refrigerant is in the prompt information of slow leak condition；
When determining that refrigerant is currently at fast leak state, it is out of service to control the constant speed air-conditioning, while controlling terminal
Display refrigerant is in the prompt information of fast leak state.
5. a kind of leak detecting device of refrigerant, which is characterized in that be used for constant speed air-conditioning, comprising:
Module is obtained, for obtaining the constant speed air-conditioning current indoor heat transfer temperature difference value △ T_in (t) and compressor current I
(t), the interior heat transfer temperature difference value △ T_in (t) is equal to the detected value Ta and inner disc temperature sensor of inner ring temperature sensor
Difference between detected value Tn；
Judgment module, for determining system according to the interior heat transfer temperature difference value △ T_in (t) and the compressor current I (t)
The current leakiness of cryogen, the current leakiness of the refrigerant include that currently leakage, refrigerant are current completely for refrigerant
Fast leak state is currently in slow leak condition, refrigerant；
Execution module, for converting the prompt information of terminal for the current leakiness of the refrigerant determined and according to institute
The difference for stating the current leakiness of refrigerant controls whether the constant speed air-conditioning continues to run.
6. the leak detecting device of refrigerant according to claim 5, which is characterized in that described when in refrigeration mode
Judgment module is used for:
If △ T_in (t)≤first threshold and I1*a%≤I (t)≤I1*b%, it is out of service to control outdoor unit, guard time
Later restart the outdoor unit, count is incremented for counter, when the counting of the counter reaches the first threshold T h1, it is determined that
Refrigerant currently leaks completely, and the I1 is compressor current setting value under refrigeration mode, and a, b are proportionality coefficient；
If first threshold < △ T_in (t) < second threshold, count is incremented for counter, when the counting of the counter reaches
Two threshold T h2, and I (t)=0 is detected at least once, it is determined that refrigerant is currently at slow leak condition；
If first threshold < △ T_in (t) < second threshold, remember that △ T_in (t) is △ T_in (j), if △ T_in (j)-△ T_
In (j+n) >=third threshold value and I (j)-I (j+n) >=I1*c%, then it is out of service to control outdoor unit, and guard time is restarted later
The outdoor unit, if △ T_in (t)≤first threshold and I1*a%≤I (t)≤I1*b% at this time, it is determined that refrigerant is currently located
In fast leak state, j is the new counting serial number met under the conditions of " first threshold < △ T_in (t) < second threshold ", and n is
Natural number not less than 1, c are proportionality coefficient.
7. the leak detecting device of refrigerant according to claim 5, which is characterized in that described when being in heating mode
Judgment module is used for:
If the threshold value of △ T_in (t)≤the 4th and I2*a%≤I (t)≤I2*b%, it is out of service to control outdoor unit, guard time
Later restart the outdoor unit, count is incremented for counter, when the counting of the counter reaches the first threshold T h1, it is determined that
Refrigerant currently leaks completely, and the I2 is compressor current setting value under heating mode；
If the 5th threshold value of the 4th threshold value < △ T_in (t) <, count is incremented for counter, when the counting of the counter reaches
When two threshold T h2, and I (t)=0 is detected at least once, it is determined that refrigerant is currently at slow leak condition；
If the 5th threshold value of the 4th threshold value < △ T_in (t) <, remember that △ T_in (t) is △ T_in (j), if △ T_in (j)-△ T_
In (j+n) >=the 6th threshold value and I (j)-I (j+n) >=I2*c%, then it is out of service to control outdoor unit, and guard time is restarted later
The outdoor unit, if the threshold value of △ T_in (t)≤the 4th and I2*a%≤I (t)≤I2*b% at this time, it is determined that refrigerant is currently located
In fast leak state, j is the new counting serial number met under the conditions of " the 5th threshold value of the 4th threshold value < △ T_in (t) < ", and n is
Natural number not less than 1.
8. the leak detecting device of refrigerant according to claim 5, which is characterized in that the execution module is used for:
When determining that refrigerant currently leaks completely, it is out of service to control the constant speed air-conditioning, while controlling terminal display is freezed
The prompt information that agent leaks completely；
When determining that refrigerant is currently at slow leak condition, the constant speed air-conditioning maintenance operating status is controlled, simultaneously
Controlling terminal shows that refrigerant is in the prompt information of slow leak condition；
When determining that refrigerant is currently at fast leak state, it is out of service to control the constant speed air-conditioning, while controlling terminal
Display refrigerant is in the prompt information of fast leak state.
9. a kind of computer readable storage medium for storing one or more programs, which is characterized in that one or more of journeys
Sequence includes instruction, and it is according to any one of claims 1-4 that described instruction when executed by a computer executes the computer
The leakage detection method of refrigerant.
10. a kind of computer program product comprising instruction, which is characterized in that when described instruction is run on computers, make
Obtain the leakage detection method that the computer executes refrigerant according to any one of claims 1-4.
11. a kind of leak detecting device of refrigerant characterized by comprising processor and memory, memory is for storing
Program, processor call the program of memory storage, to execute the leakage inspection of refrigerant according to any one of claims 1-4
Survey method.
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| CN111811175A (en) * | 2019-04-11 | 2020-10-23 | 开利公司 | Refrigerant leak sensor pre-trip inspection sequence and diagnosis |
| CN113574334A (en) * | 2019-03-15 | 2021-10-29 | 三菱重工制冷空调系统株式会社 | Air conditioning system for vehicle and control method of air conditioning system for vehicle |
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