CN104677551A - Refrigerant leakage detection method for air conditioning system - Google Patents
Refrigerant leakage detection method for air conditioning system Download PDFInfo
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Abstract
The invention discloses a refrigerant leakage detection method for an air conditioning system. The refrigerant leakage detection method comprises the following steps: S10, starting up a control system, running for first preset time t1, detecting and calculating or presetting the average value T10a of a heat exchange tube temperature; S20, judging whether the running mode of the air conditioning system is a refrigeration mode, a dehumidification mode or a heating mode, and controlling the air conditioning system to continue the following steps if a judgment result is positive; S30, controlling the air conditioning system to run for third preset time t3, detecting and calculating the average value T2a of an indoor temperature, detecting and calculating the average value T11a of the heat exchange tube temperature, comparing |T2a-T11a| with a preset temperature difference Tc, comparing |T10a-T11a| with a heat exchange tube temperature preset change value deltaT1, and making a fault alarm or controlling a compressor to stop through the control system when |T2a-T11a| is smaller than Tc, and |T10a-T11a| is smaller than deltaT1. The refrigerant leakage detection method for the air conditioning system in the embodiment of the invention is simple, and is easy to implement. The running reliability of the system can be enhanced.
Description
Technical field
The present invention relates to refrigeration technology field, especially relate to a kind of leakage of refrigerant detection method of air-conditioning system.
Background technology
The method of welding all is taked to connect between the condenser of air conditioner air-conditioning system, evaporator, pipe arrangement, adopt between indoor set, off-premises station, connecting pipe and be threaded, so just have that micro-leakage appears in system, the matching loose that is threaded makes the problems such as leakage of refrigerant, thus cause air conditioner not freeze not heating or compressor burns out, affect the use of user.
In air conditioner use procedure, detect that whether cold-producing medium is revealed, and can improve the reliability of air conditioner in time.The method whether existing detection cold-producing medium is revealed is complicated, and cost is higher.
Summary of the invention
The present invention is intended at least to solve one of technical matters existed in prior art.
For this reason, the present invention needs the leakage of refrigerant detection method providing a kind of air-conditioning system, and this detection method is simple, easily realizes, can improve the operational reliability of air-conditioning system.
Described air-conditioning system comprises end to end compressor, outdoor heat exchanger, restriction device, indoor heat exchanger and indoor heat exchange blower fan successively, and the leakage of refrigerant detection method according to the air-conditioning system of the embodiment of the present invention comprises the steps:
S10, control described air-conditioning system and start shooting and run the first schedule time t1, detection computations or be preset in the mean value T10a of heat exchanger tube temperature of the indoor heat exchanger in described first schedule time t1;
S20, judge that whether the operational mode of described air-conditioning system is refrigeration, dehumidifying or heating mode, when result of determination is "No", control described air-conditioning system and keep normal operation by former set model, when result of determination is "Yes", controls described air-conditioning system and continue following steps;
S30, control described air-conditioning system run the 3rd schedule time t3, the mean value of the indoor temperature of detection computations in described 3rd schedule time t3 also obtains T2a, the mean value of the described heat exchanger tube temperature of detection computations in described 3rd schedule time t3 also obtains T11a
Shu T2a-T11a Shu and temperature predetermined difference value Tc is compared, judges whether Shu T2a-T11a Shu is less than Tc, and Shu T10a-T11a Shu and heat exchanger tube temperature predetermined variation value Δ T1 is compared, judge whether Shu T10a-T11a Shu is less than Δ T1,
As Shu T2a-T11a Shu < Tc and Shu T10a-T11a Shu < Δ T1 time, control described air-conditioning system and carry out fault alarm or control described compressor shutdown,
As Shu T2a-T11a Shu >=Tc or Shu T10a-T11a Shu >=Δ T1, control described air-conditioning system and keep normal operation by former set model.
According to the leakage of refrigerant detection method of the embodiment of the present invention, in refrigeration, dehumidifying or heating operations, according to the relation variable between the indoor temperature detected in real time and the heat exchanger tube temperature of indoor heat exchanger, effectively can detect whether air-conditioning system lacks cold-producing medium, this detection method is simple, easy realization, and the operational reliability that can improve air-conditioning system.And by detection computations or default heat exchanger tube temperature averages T10a, by temperature averages T2a in sensing chamber and heat exchanger tube temperature averages T11a, measured value can be made more accurate, and then make detection method more accurate.
In addition, also following additional technical feature can be had according to the leakage of refrigerant detection method of air-conditioning system of the present invention:
According to one embodiment of present invention; as Shu T2a-T11a Shu < Tc and Shu T10a-T11a Shu < Δ T1 time; before the described air-conditioning system of control is carried out fault alarm or controlled described compressor shutdown, also comprise the steps:
S31, control described indoor heat exchange blower fan rotating speed decline predetermined value after control described air-conditioning system and run the 4th schedule time t4;
The mean value of S32, detection computations described indoor temperature in described 4th schedule time t4 also obtains T2a '; the mean value of detection computations described heat exchanger tube temperature in described 4th schedule time t4 also obtains T11a '; Shu T2a '-T11a ' Shu and Tc is compared; and Shu T10a-T11a ' Shu and Δ T1 is compared; as Shu T2a '-T11a ' Shu < Tc and Shu T10a-T11a ' Shu < Δ T1 time, control described air-conditioning system and carry out fault alarm or control described compressor shutdown.
Alternatively, in step S20, before or after the operational mode judging described air-conditioning system, control described air-conditioning system and run the second schedule time t2.
According to one embodiment of present invention, the scope of described first schedule time t1 is: 0.5min ~ 5min.
According to one embodiment of present invention, the scope of described second schedule time t2 is: 10min ~ 30min.
According to one embodiment of present invention, the scope of described 3rd schedule time t3 is: 0.5min ~ 5min.
According to one embodiment of present invention, the scope of described 4th schedule time t4 is: 10min ~ 20min.
According to one embodiment of present invention, when described air-conditioning system is for refrigeration or dehumidification mode, the span of described temperature predetermined difference value Tc is 1 ~ 3 DEG C, and the span of described heat exchanger tube temperature predetermined variation value Δ T1 is 1 ~ 3 DEG C.
According to one embodiment of present invention, when described air-conditioning system is heating mode, the span of described temperature predetermined difference value Tc is 1 ~ 5 DEG C, and the span of described heat exchanger tube temperature predetermined variation value Δ T1 is 1 ~ 5 DEG C.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural representation of the air-conditioning system according to the embodiment of the present invention;
Fig. 2 is the process flow diagram of the leakage of refrigerant detection method of air-conditioning system according to an embodiment of the invention;
Fig. 3 is the process flow diagram of the leakage of refrigerant detection method of air-conditioning system in accordance with another embodiment of the present invention.
Description of reference numerals:
Compressor 1; Outdoor heat exchanger 2; Restriction device 3; Indoor heat exchanger 4; Indoor heat exchange blower fan 5; Outdoor heat exchange blower fan 6.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Below first see Fig. 1, the air-conditioning system according to the embodiment of the present invention is described.As shown in Figure 1, air-conditioning system comprises end to end compressor 1, outdoor heat exchanger 2, restriction device 3, indoor heat exchanger 4 successively, specifically, the outlet of compressor 1 is connected with the entrance of outdoor heat exchanger 2, the outlet of outdoor heat exchanger 2 is connected with the entrance of restriction device 3, the outlet of restriction device 3 is connected with the entrance of indoor heat exchanger 4, and the outlet of indoor heat exchanger 4 is connected with the entrance of compressor 1.Cold-producing medium flows through compressor 1, outdoor heat exchanger 2, restriction device 3 and indoor heat exchanger 4 successively, forms refrigeration cycle; Cold-producing medium flows through compressor 1, indoor heat exchanger 4, restriction device 3 and outdoor heat exchanger 2 successively, forms and heats circulation.Be understandable that, the air-conditioning system according to the embodiment of the present invention can be applied in air-conditioning equipment, and this air-conditioning equipment can be the concrete device structure such as domestic air conditioning, central air conditioner alternatively.
According to the air-conditioning system of the embodiment of the present invention, also comprise indoor heat exchange blower fan 5, indoor heat exchange blower fan 5 and indoor heat exchanger 4 can form indoor units.Wherein, the indoor heat exchange blower fan 5 according to the air-conditioning system of the embodiment of the present invention has many grades of wind speed shelves, such as powerful wind shelves, high wind wind shelves, apoplexy wind shelves, low wind wind shelves etc.Or indoor heat exchange blower fan 5 is stepless time adjustment, and namely the adjustment of rotational speed of indoor heat exchange blower fan 5 is continuous print.The air-conditioning system of the embodiment of the present invention can also comprise outdoor heat exchange blower fan 6, and outdoor heat exchange blower fan 6 and outdoor heat exchanger 2 form outdoor unit.
Referring to Fig. 2 and Fig. 3, the leakage of refrigerant detection method according to the air-conditioning system of the embodiment of the present invention is described.Be understandable that, whether the cold-producing medium that this detection method may be used for detecting air-conditioning system is revealed to report to the police to user in time, the leakage of refrigerant problem of air-conditioning system can be solved in time after user receives warning message, or air-conditioning system can be out of service in time, and then compressor 1 can be avoided in time to burn out, or the reason that can not freeze to air-conditioning system or not heat plays suggesting effect.
Specifically, leakage of refrigerant detection method comprises the steps:
S10, control air-conditioning system are started shooting and run the first schedule time t1, and detection computations goes out the mean value of the heat exchanger tube temperature of the indoor heat exchanger in the first schedule time t1 and obtains T10a.That is, can temperature sensor be passed through, detect the temperature of heat exchanger tube and the heat exchanger tube temperature averages calculated in the first schedule time t1 obtain T10a.Alternatively, the scope of the first schedule time t1 can be 0.5min ~ 5min, that is, measures heat exchanger tube temperature averages T10a in the starting stage that air-conditioning system start runs.Such as can control air conditioner by telepilot and carry out start operation.Wherein the detection computations of temperature averages can be prior art.
In another example of the present invention, this mean value T10a can also preset, and without the need to detecting, the mean value namely presetting the heat exchanger tube temperature of the indoor heat exchanger in the first schedule time t1 is T10a again.
S20, judge that whether the operational mode of air-conditioning system is refrigeration, dehumidifying or heating mode.Here it should be noted that, air-conditioning equipment can have the various modes such as refrigeration mode, heating mode, dehumidification mode, ventilatory pattern.Wherein judge that the method for the operational mode of air-conditioning system can be existing and can be well-known to those skilled in the art, therefore no longer describes in detail here.Wherein there are following judgement conclusion and alignment processing method in step S20:
S201, when result of determination is "No", controls air-conditioning system and keep normal by former set model and run.That is, when the operational mode of air-conditioning system be non-brake method, non-dehumidifying and non-heating mode time, control air-conditioning system and keep normal according to former set model program and run.That is, when the operational mode of air-conditioning system is other patterns such as ventilatory pattern, control the operation that air-conditioning system proceeds corresponding modes.
S202, when result of determination is "Yes", control described air-conditioning system continue following steps.That is, when the operational mode of air-conditioning system is for freezing, dehumidifying or heat, continues to control air-conditioning system and continue following steps according to former set model program, namely proceed step S30.
Alternatively, before or after the operational mode of judgement air-conditioning system, air-conditioning system can be controlled and run the second schedule time t2.That is, for air-conditioning system operational mode judge and control air-conditioning system run the operation order of the second schedule time t2 can for arbitrarily, such as before the operational mode judging air-conditioning system, can first control after air-conditioning system runs the second schedule time t2, carry out judgement operational mode again, after air-conditioning system running status can be made thus stable, then carry out the judgement of operational mode, result of determination can be made so more accurate.Or after the operational mode judging air-conditioning system, then control air-conditioning system and run the second schedule time t2, after air-conditioning system also can be made thus stable, control air-conditioning system and run certain hour continue subsequent step again after making air-conditioning system steadily.Alternatively, the second schedule time t2 can be 10min ~ 30min.
S30, control air-conditioning system and run the 3rd schedule time t3, the mean value of the indoor temperature of detection computations in the 3rd schedule time t3 also obtains T2a, and the mean value of the heat exchanger tube temperature of detection computations in the 3rd schedule time t3 also obtains T11a.That is, indoor temperature can be detected by temperature sensor, and the indoor temperature mean value calculated in the 3rd schedule time t3 obtain T2a, heat exchanger tube temperature can be detected by temperature sensor and the heat exchanger tube temperature averages calculated in the 3rd schedule time t3 obtain T11a.Alternatively, the scope of the 3rd schedule time t3 can be 0.5min ~ 5min.
S301, Shu T2a-T11a Shu and temperature predetermined difference value Tc to be compared, judge whether Shu T2a-T11a Shu is less than Tc, and Shu T10a-T11a Shu and heat exchanger tube temperature predetermined variation value Δ T1 is compared, judge whether Shu T10a-T11a Shu is less than Δ T1, judge conclusion and alignment processing method as follows:
S3011, as Shu T2a-T11a Shu < Tc and Shu T10a-T11a Shu < Δ T1 time; control air-conditioning system carry out fault alarm or control compressor shutdown; now the air-conditioning system situation that may be in leakage of refrigerant or lack, can carry out fault alarm to user or compressor 1, outdoor heat exchange blower fan 6 be closed.Particularly, fault alarm can be audible alarm, failure code display, alarm lamp flicker etc.
Specifically, when air-conditioning system lacks cold-producing medium, the heat exchanger tube temperature averages T11a that air-conditioning system detects can be close with indoor temperature mean value T2a, and the difference of such heat exchanger tube temperature averages T11a and indoor temperature mean value T2a is less than temperature predetermined difference value Tc; When air-conditioning system lacks cold-producing medium, have passed through the heat exchanger tube temperature averages T11a after the second schedule time t2 and the 3rd schedule time t3, and the changing value between the heat exchanger tube temperature averages T10a after the first schedule time t1 is little, that is, when air-conditioning system lacks cold-producing medium, the heat exchanger tube temperature difference in time freezing for a long time, dehumidify or heat exchanger tube temperature after heating operation and system just run is little.To sum up can control air-conditioning system carry out fault alarm and stop compressor 1 and indoor heat exchange blower fan 5.
S3012, as Shu T2a-T11a Shu >=Tc or Shu T10a-T11a Shu >=Δ T1, control air-conditioning system and keep normal by former set model and run.Now the refrigerant amount of air-conditioning system is enough, and air-conditioning system keeps normal by former set model and runs.
According to the leakage of refrigerant detection method of the embodiment of the present invention, in refrigeration, dehumidifying or heating operations, according to the relation variable between the indoor temperature detected in real time and the heat exchanger tube temperature of indoor heat exchanger 4, effectively can detect whether air-conditioning system lacks cold-producing medium, this detection method is simple, easy realization, and the operational reliability that can improve air-conditioning system.And by detection computations or default heat exchanger tube temperature averages T10a, by temperature averages T2a in sensing chamber and heat exchanger tube temperature averages T11a, measured value can be made more accurate, and then make detection method more accurate.
It should be noted that, the temperature predetermined difference value Tc value of air-conditioning system under refrigeration, dehumidifying and heating mode can be equal, also can be unequal.Particularly, when air-conditioning system is for refrigeration or dehumidification mode, the span of temperature predetermined difference value Tc is 1 ~ 3 DEG C; When air-conditioning system is heating mode, the span of temperature predetermined difference value Tc is 1 ~ 5 DEG C.Wherein, the concrete value of temperature predetermined difference value Tc can be determined according to different air-conditioning systems.
In like manner, the heat exchanger tube temperature predetermined variation value Δ T1 value of air-conditioning system under refrigeration, dehumidifying and heating mode can be equal, also can not think.Particularly, when air-conditioning system is for refrigeration or dehumidification mode, the span of heat exchanger tube temperature predetermined variation value Δ T1 is 1 ~ 3 DEG C.When air-conditioning system is heating mode, the span of heat exchanger tube temperature predetermined variation value Δ T1 is 1 ~ 5 DEG C.
According to one embodiment of present invention; as shown in Figure 3; as Shu T2a-T11a Shu < Tc and Shu T10a-T11a Shu < Δ T1 time, carry out fault alarm in control air-conditioning system or control before compressor shutdown, also comprising the steps:
In S31, pulpit heat exchange blower fan rotating speed decline predetermined value after control air-conditioning system run the 4th schedule time t4.Alternatively, the scope of the 4th schedule time t4 can be 10min ~ 20min, after air-conditioning system can be made thus to tend towards stability, then continues subsequent step, avoids occurring larger deviation.
The mean value of S32, detection computations described indoor temperature in described 4th schedule time t4 also obtains T2a ', the mean value of detection computations described heat exchanger tube temperature in described 4th schedule time t4 also obtains T11a ', that is, indoor temperature can be detected by temperature sensor, and the indoor temperature mean value calculated in the 4th schedule time t4 obtain T2a ', heat exchanger tube temperature can be detected by temperature sensor and the heat exchanger tube temperature averages calculated in the 4th schedule time t4 obtain T11a '.
Shu T2a '-T11a ' Shu and Tc is compared, and Shu T10a-T11a ' Shu and Δ T1 is compared, judge conclusion and alignment processing method as follows:
S321, as Shu T2a '-T11a ' Shu < Tc and Shu T10a-T11a ' Shu < Δ T1 time, control air-conditioning system carry out fault alarm or control compressor shutdown.
S322, as Shu T2a '-T11a ' Shu >=Tc or Shu T10a-T11a ' Shu >=Δ T1, control air-conditioning system and keep normal and run, such as, keep setting windscreen normally to run.
Above-mentioned steps illustrate, as Shu T2a-T11a Shu < Tc and Shu T10a-T11a Shu < Δ T1 time, in order to improve the accuracy rate of detection, also need carry out secondary detection and compare, to avoid occurring false alarm.Concrete means are, in pulpit heat exchange blower fan 5 rotating speed decline predetermined value after and control air-conditioning system run the 4th schedule time t4, detection computations goes out indoor temperature mean value T2a ' in the 4th schedule time t4 and heat exchanger tube temperature averages T11a ' again, and detected value is proceeded to compare, as Shu T2a '-T11a ' Shu < Tc and Shu T10a-T11a ' Shu < Δ T1 time (compared with the comparison procedure in step S30, make Shu T2a '-T11a ' Shu < Tc and Shu T10a-T11a ' Shu < Δ T1 second time meet), control air-conditioning system to carry out fault alarm or control compressor 1 shutting down, such as control air-conditioning system directly to carry out fault alarm or control compressor 1 shutting down, as Shu T2a '-T11a ' Shu >=Tc or Shu T10a-T11a ' Shu >=Δ T1, controlling air-conditioning system keeps setting windscreen normally to run, namely in pulpit, heat exchange blower fan recovery setting continuation operation no longer judges, this illustrates that air-conditioning system is after above-mentioned steps detects, and air-conditioning system does not lack cold-producing medium.
It is appreciated of course that; as Shu T2a-T11a Shu < Tc and Shu T10a-T11a Shu < Δ T1 time; before the described air-conditioning system of control is carried out fault alarm or is controlled described compressor shutdown; step S31 and S32 can be carried out repeatedly; that is; before carrying out fault alarm or compressor shutdown; the detection of indoor temperature and heat pipe temperature and the calculating of mean value can be carried out repeatedly; the false alarm of air-conditioning system and the frequent shutdown of compressor can be avoided thus, save energy consumption.
In order to technical scheme of the present invention is better described, will describe below according to a specific embodiment of the present invention, whether the cold-producing medium namely detecting air conditioner is revealed.Particularly, when indoor heat exchange blower fan 5 is for stepless time adjustment, suppose that wind speed range is 0 ~ 100%, wind shelves decline predetermined value is taken off and is fallen 20%, if when the original wind speed of indoor heat exchange blower fan 5 is less than 20% of maximum wind velocity, is then reduced to 1% of maximum wind velocity.Or there are four wind shelves air conditioners (powerful, Gao Feng, apoplexy, low wind) and decline one grade.
See Fig. 1-Fig. 3, first suppose that user starts air conditioner and carries out operation of freezing or dehumidify, the first schedule time t1 time got 1min, and the second schedule time t2 gets 20min, and the 3rd schedule time t3 gets 1min, and the 4th schedule time t4 gets 20min.When supposing air conditioner refrigeration mode, temperature predetermined difference value Tc is 2 DEG C (during heating mode, temperature predetermined difference value Tc also can be 2 DEG C), when supposing air conditioner refrigeration mode heat exchanger tube temperature predetermined variation value Δ T1 be 2 DEG C (when supposing air conditioner heat-production pattern, heat exchanger tube temperature predetermined variation value Δ T1 is 2 DEG C).
As shown in Figures 2 and 3, the detection method of the leakage of refrigerant of air conditioner is specially:
The first step: user opens air conditioner, working time, 1min, detected the mean value T10a of heat exchanger tube temperature;
Second step: judge whether air conditioner runs with refrigeration, dehumidifying or heating mode, controls air conditioner and runs 20min;
3rd step: control air conditioner and run 20min;
4th step: control air conditioner again and run 20min, temperature averages T2a in sensing chamber, heat exchanger tube temperature averages T11a;
5th step: judge whether Shu T2a-T11a Shu is less than 2 DEG C and whether Shu T10a-T11a Shu is less than 2 DEG C;
6th step: judge Shu T2a-T11a Shu < 2 DEG C and Shu T10a-T11a Shu < 2 DEG C, air conditioner is from reduction by 20% current operation wind shelves, continue 20min working time, detect the mean value T2a' of indoor temperature, detect the mean value T11a' of heat exchanger tube temperature;
7th step: judge whether Shu T2a '-T11a ' Shu is less than 2 DEG C and whether Shu T10a-T11a ' Shu is less than 2 DEG C;
8th step: judge Shu T2a '-T11a ' Shu < 2 DEG C and Shu T10a-T11a ' Shu < 2 DEG C, air conditioner room unit sends " failure code ", stops compressor 1 and outdoor heat exchange blower fan 6 simultaneously.
Above-mentioned steps can detect in time air conditioner due to the micro-leakage of system, connect pipe valve and the refrigrant leakage that reason causes such as to loosen, avoid compressor 1 to burn out, quote the air conditioner caused due to secondary refrigerant leakage in time and not freeze the reason do not heated.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (9)
1. a leakage of refrigerant detection method for air-conditioning system, described air-conditioning system comprises end to end compressor, outdoor heat exchanger, restriction device, indoor heat exchanger and indoor heat exchange blower fan successively, it is characterized in that, comprises the steps:
S10, control described air-conditioning system and start shooting and run the first schedule time t1, detection computations or be preset in the mean value T10a of heat exchanger tube temperature of the indoor heat exchanger in described first schedule time t1;
S20, judge that whether the operational mode of described air-conditioning system is refrigeration, dehumidifying or heating mode, when result of determination is "No", control described air-conditioning system and keep normal operation by former set model, when result of determination is "Yes", controls described air-conditioning system and continue following steps;
S30, control described air-conditioning system run the 3rd schedule time t3, the mean value of the indoor temperature of detection computations in described 3rd schedule time t3 also obtains T2a, the mean value of the described heat exchanger tube temperature of detection computations in described 3rd schedule time t3 also obtains T11a
Shu T2a-T11a Shu and temperature predetermined difference value Tc is compared, judges whether Shu T2a-T11a Shu is less than Tc, and Shu T10a-T11a Shu and heat exchanger tube temperature predetermined variation value Δ T1 is compared, judge whether Shu T10a-T11a Shu is less than Δ T1,
As Shu T2a-T11a Shu < Tc and Shu T10a-T11a Shu < Δ T1 time, control described air-conditioning system and carry out fault alarm or control described compressor shutdown,
As Shu T2a-T11a Shu >=Tc or Shu T10a-T11a Shu >=Δ T1, control described air-conditioning system by former setting mould
Formula keeps normal and runs.
2. the leakage of refrigerant detection method of air-conditioning system according to claim 1; it is characterized in that; as Shu T2a-T11a Shu < Tc and Shu T10a-T11a Shu < Δ T1 time; before the described air-conditioning system of control is carried out fault alarm or controlled described compressor shutdown, also comprise the steps:
S31, control described indoor heat exchange blower fan rotating speed decline predetermined value after control described air-conditioning system and run the 4th schedule time t4;
The mean value of S32, detection computations described indoor temperature in described 4th schedule time t4 also obtains T2a '; the mean value of detection computations described heat exchanger tube temperature in described 4th schedule time t4 also obtains T11a '; Shu T2a '-T11a ' Shu and Tc is compared; and Shu T10a-T11a ' Shu and Δ T1 is compared; as Shu T2a '-T11a ' Shu < Tc and Shu T10a-T11a ' Shu < Δ T1 time, control described air-conditioning system and carry out fault alarm or control described compressor shutdown.
3. the leakage of refrigerant detection method of air-conditioning system according to claim 1, is characterized in that, in step S20, before or after the operational mode judging described air-conditioning system, controls described air-conditioning system and runs the second schedule time t2.
4. the leakage of refrigerant detection method of air-conditioning system according to claim 1, is characterized in that, the scope of described first schedule time t1 is: 0.5min ~ 5min.
5. the leakage of refrigerant detection method of air-conditioning system according to claim 1, is characterized in that, the scope of described second schedule time t2 is: 10min ~ 30min.
6. the leakage of refrigerant detection method of air-conditioning system according to claim 1, is characterized in that, the scope of described 3rd schedule time t3 is: 0.5min ~ 5min.
7. the leakage of refrigerant detection method of air-conditioning system according to claim 1, is characterized in that, the scope of described 4th schedule time t4 is: 10min ~ 20min.
8. the leakage of refrigerant detection method of air-conditioning system according to claim 1, it is characterized in that, when described air-conditioning system is for refrigeration or dehumidification mode, the span of described temperature predetermined difference value Tc is 1 ~ 3 DEG C, and the span of described heat exchanger tube temperature predetermined variation value Δ T1 is 1 ~ 3 DEG C.
9. the leakage of refrigerant detection method of air-conditioning system according to claim 1, it is characterized in that, when described air-conditioning system is heating mode, the span of described temperature predetermined difference value Tc is 1 ~ 5 DEG C, and the span of described heat exchanger tube temperature predetermined variation value Δ T1 is 1 ~ 5 DEG C.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949278A (en) * | 2015-06-25 | 2015-09-30 | 海信（山东）空调有限公司 | Method and device for detecting refrigerant leakage of air conditioner and air-conditioning device |
| CN105258219A (en) * | 2015-10-10 | 2016-01-20 | 安徽美芝精密制造有限公司 | Air conditioner and control method and system for air conditioner |
| CN105423487A (en) * | 2015-11-17 | 2016-03-23 | 四川长虹电器股份有限公司 | Information processing method and temperature regulating device |
| CN106123205A (en) * | 2016-06-17 | 2016-11-16 | 美的集团武汉制冷设备有限公司 | Moveable air conditioner and coolant leakage detection method thereof |
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| CN109539456A (en) * | 2017-09-21 | 2019-03-29 | 奥克斯空调股份有限公司 | A kind of guard method of air conditioner room unit and device |
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| CN104949278A (en) * | 2015-06-25 | 2015-09-30 | 海信（山东）空调有限公司 | Method and device for detecting refrigerant leakage of air conditioner and air-conditioning device |
| CN105258219B (en) * | 2015-10-10 | 2018-06-29 | 安徽美芝精密制造有限公司 | Air conditioner and its control method and control system |
| CN105258219A (en) * | 2015-10-10 | 2016-01-20 | 安徽美芝精密制造有限公司 | Air conditioner and control method and system for air conditioner |
| CN105423487A (en) * | 2015-11-17 | 2016-03-23 | 四川长虹电器股份有限公司 | Information processing method and temperature regulating device |
| CN105423487B (en) * | 2015-11-17 | 2019-03-12 | 四川长虹电器股份有限公司 | A kind of information processing method and temperature control equipment |
| US10399412B2 (en) | 2016-06-08 | 2019-09-03 | Truma Geraetetechnik Gmbh & Co. Kg | Air conditioning system and method for leakage detection in an air conditioning system |
| CN106123205A (en) * | 2016-06-17 | 2016-11-16 | 美的集团武汉制冷设备有限公司 | Moveable air conditioner and coolant leakage detection method thereof |
| CN106123205B (en) * | 2016-06-17 | 2019-07-30 | 美的集团武汉制冷设备有限公司 | Moveable air conditioner and its coolant leakage detection method |
| CN106196419A (en) * | 2016-06-23 | 2016-12-07 | 海信（山东）空调有限公司 | A kind of air-conditioning state detection method, device and air-conditioning |
| WO2018077069A1 (en) * | 2016-10-27 | 2018-05-03 | 珠海格力电器股份有限公司 | Method and device for fresh air system fault determination and alarm system |
| CN109539456A (en) * | 2017-09-21 | 2019-03-29 | 奥克斯空调股份有限公司 | A kind of guard method of air conditioner room unit and device |
| US10941956B2 (en) | 2018-04-13 | 2021-03-09 | Carrier Corporation | Data processing method, refrigerant leakage detection method, system failure detection method and system performance detection method |
| CN114322200A (en) * | 2022-01-04 | 2022-04-12 | 广东美的制冷设备有限公司 | Air conditioner refrigerant leakage detection method and device, air conditioner and storage medium |
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