CN104122463A - Method and system for detecting electronic expansion valve - Google Patents
Method and system for detecting electronic expansion valve Download PDFInfo
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- CN104122463A CN104122463A CN201410338939.9A CN201410338939A CN104122463A CN 104122463 A CN104122463 A CN 104122463A CN 201410338939 A CN201410338939 A CN 201410338939A CN 104122463 A CN104122463 A CN 104122463A
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Abstract
The invention discloses a method and system for detecting an electronic expansion valve. The method comprises the steps of detecting a first pressure value of a corresponding electrical device when the opening of the electronic expansion valve is a first opening value after the electrical device where the electronic expansion valve is installed is switched to a refrigeration mode; controlling the electronic expansion valve to close to a second opening value and detecting a second pressure value of the corresponding electrical device when the opening of the electronic expansion valve is the second opening value; and judging whether the electronic expansion valve is normal according to the first pressure value and the second pressure value. According to the method, whether the electronic expansion valve is normal is judged according to the first pressure value of the corresponding electrical device when the electronic expansion valve is in an opened state and the second pressure value of the corresponding electrical device when the electronic expansion valve is in a closed state. Simultaneous detection of opening motions and closing motions of the electronic expansion valve is achieved. The problems that the closing motions of the electronic expansion valve cannot be detected in the prior art and effectiveness of electronic expansion valve detection cannot be achieved are effectively solved.
Description
Technical field
The present invention relates to electrical equipment detection field, particularly relate to a kind of electric expansion valve detection method and system.
Background technology
Electric expansion valve, as a kind of throttle structure of air conditioner, has been widely used in various domestic variable frequency air conditioners.The stability of the part that the stability of air conditioner operation is made up of it to a certain extent determines.And electric expansion valve is as a kind of constituent part of air conditioner, owing to using after sale the failure rate that existence is larger, therefore affect to a great extent the stable operation of air conditioner.
Affect the problem of the stable operation of air conditioner for above-mentioned electric expansion valve, conventionally need to detect electric expansion valve, the electric expansion valve of guaranteeing to be arranged on air conditioner is functional, to ensure the stable operation of air conditioner.
At present, for the detection of electric expansion valve, conventionally adopt electric expansion valve to open frock the solenoid of electric expansion valve is powered on, thereby the mandatory electric expansion valve of opening makes electric expansion valve carry out the detection of electric expansion valve in full open position.But whether this detection method can only can realize breakdown action by detected electrons expansion valve, closing motion that can not detected electrons expansion valve, and then can not realize the validity that electric expansion valve detects.
Summary of the invention
Based on this, be necessary for existing electric expansion valve detect can not detected electrons expansion valve closing motion, and then can not realize the problem of the validity that electric expansion valve detects, a kind of electric expansion valve detection method and system are provided.
A kind of electric expansion valve detection method providing for realizing the object of the invention, comprises the steps:
When being installed, the electrical equipment of electric expansion valve switches to after refrigeration mode the first force value of corresponding described electrical equipment when the aperture that detects described electric expansion valve is the first opening value;
Control described electric expansion valve and close to the second opening value, and the second force value of the aperture that detects described electric expansion valve corresponding described electrical equipment while being described the second opening value;
According to described the first force value and described the second force value, judge that whether described electric expansion valve is normal;
Wherein, described the second opening value is less than described the first opening value.
In an embodiment, described according to described the first force value and described the second force value therein, judge that whether described electric expansion valve is normal, comprises the steps:
Judge whether described the second force value is less than or equal to 85% of described the first force value;
When described the second force value be less than or equal to described the first force value 85% time, described electric expansion valve is normal;
When described the second force value be greater than described the first force value 85% time, described electric expansion valve is abnormal.
In an embodiment, also comprise the steps: therein
In the time that described electric expansion valve is normal, the aperture of controlling described electric expansion valve returns to described the first opening value.
Therein in an embodiment, describedly switch to after refrigeration mode when the electrical equipment of electric expansion valve is installed, when the aperture that detects described electric expansion valve is the first opening value, the first force value of corresponding described electrical equipment, comprises the steps:
When described electrical equipment switches to after described refrigeration mode, the aperture that records described electric expansion valve is described the first opening value;
When described electrical equipment switches to after described refrigeration mode the first Preset Time, described first force value of corresponding described electrical equipment when the aperture that detects described electric expansion valve is described the first opening value;
Wherein, the value of described the first Preset Time is 30s.
In an embodiment, described control electric expansion valve closes to the second opening value, comprises the steps: therein
Input electronic expansion valve opening fixed value is to the control chip of described electrical equipment;
The control chip of described electrical equipment, according to described electronic expansion valve opening fixed value, is controlled described electric expansion valve and is closed to described the second opening value;
Wherein, described electronic expansion valve opening fixed value is 80 steps.
In an embodiment, control described electric expansion valve and close to the second opening value therein, comprise the steps:
Input electronic expansion valve opening empirical value is to the control chip of described electrical equipment;
The control chip of described electrical equipment, according to described electronic expansion valve opening empirical value, is controlled described electric expansion valve and is closed to described the second opening value;
Wherein, described electronic expansion valve opening empirical value is more than or equal to 70% of described the first opening value, and is less than or equal to 90% of described the first opening value.
Accordingly, for realizing above-mentioned any electric expansion valve detection method, the present invention also provides a kind of electric expansion valve detection system, comprises detection frock, and described detection frock is connected with the electrical equipment communication that electric expansion valve is installed;
Described detection frock comprises detection module, control module and judge module;
Described detection module, for switching to after refrigeration mode when described electrical equipment, the first force value of corresponding described electrical equipment when the aperture that detects described electric expansion valve is the first opening value;
Described control module, closes to the second opening value for controlling described electric expansion valve;
Described detection module, the second force value of corresponding described electrical equipment while being also described the second opening value for detection of the aperture of described electric expansion valve;
Described judge module, for according to described the first force value and described the second force value, judges that whether described electric expansion valve is normal;
Wherein, described the second opening value is less than described the first opening value.
In an embodiment, described judge module, for judging whether described the second force value is less than or equal to 85% of described the first force value therein;
When described the second force value be less than or equal to described the first force value 85% time, described electric expansion valve is normal;
When described the second force value be greater than described the first force value 85% time, described electric expansion valve is abnormal.
Therein in an embodiment, described control module, also, for judging described electric expansion valve when described judging unit when normal, the aperture of controlling described electric expansion valve returns to described the first opening value.
In an embodiment, described detection frock also comprises logging modle therein;
Described logging modle, for switching to after described refrigeration mode when described electrical equipment, the aperture that records described electric expansion valve is described the first opening value;
Described detection module, for switching to when described electrical equipment after described refrigeration mode the first Preset Time, described first force value of corresponding described electrical equipment when the aperture that detects described electric expansion valve is described the first opening value;
Wherein, the value of described the first Preset Time is 30s.
In an embodiment, described control module comprises the first load module therein;
Described the first load module, for inputting the control chip of electronic expansion valve opening fixed value to described electrical equipment;
The control chip of described electrical equipment, according to described electronic expansion valve opening fixed value, is controlled described electric expansion valve and is closed to described the second opening value;
Wherein, described electronic expansion valve opening fixed value is 80 steps.
In an embodiment, described detection frock also comprises the second load module therein;
Described the second load module, for inputting the control chip of electronic expansion valve opening empirical value to described electrical equipment;
The control chip of described electrical equipment, according to described electronic expansion valve opening empirical value, is controlled described electric expansion valve and is closed to described the second opening value;
Wherein, described electronic expansion valve opening empirical value is more than or equal to 70% of described the first opening value, and is less than or equal to 90% of described the first opening value.
In an embodiment, described detection module is pressure transducer therein; Described pressure transducer is arranged on the pipe laying of described electric expansion valve.
The beneficial effect of above-mentioned electric expansion valve detection method and system: wherein method is by being added to the detection of electric expansion valve in the automatic testing process of electrical equipment, when the electrical equipment that electric expansion valve is installed switches to after refrigeration mode in automatic testing process, when now the aperture of electric expansion valve is the first opening value, detect the first force value of electrical equipment.Then control electric expansion valve and close to the second opening value, and detected electrons expands in the time of the second opening value, the second force value of electrical equipment.According to the first force value of electric expansion valve electrical equipment when the first opening value and electric expansion valve, the second force value of electrical equipment during at the second opening value, judges that whether electric expansion valve is normal.When having realized the detection of electric expansion valve opening action, also carry out the detection of electric expansion valve closing motion.Effectively solved existing electric expansion valve detect can not detected electrons expansion valve closing motion, and then can not realize the problem of the validity that electric expansion valve detects.
Brief description of the drawings
Fig. 1 is electric expansion valve detection method one specific embodiment process flow diagram;
Fig. 2 is another specific embodiment process flow diagram of electric expansion valve detection method;
Fig. 3 is the another specific embodiment process flow diagram of electric expansion valve detection method.
Embodiment
For making technical solution of the present invention clearer, below in conjunction with drawings and the specific embodiments, the present invention is described in further details.
Referring to Fig. 1, as the electric expansion valve detection method of a specific embodiment, comprise the steps:
Step S100, switches to after refrigeration mode when the electrical equipment of electric expansion valve is installed, the first force value of corresponding electrical equipment when the aperture of detected electrons expansion valve is the first opening value.
Step S200, controls electric expansion valve and closes to the second opening value, and the second force value of the aperture of detected electrons expansion valve corresponding electrical equipment while being the second opening value.
Step S300, according to the first force value and the second force value, judges that whether electric expansion valve is normal.
It is by adding to the detection of electric expansion valve in the automatic testing process of electrical equipment, when being installed, the electrical equipment of electric expansion valve in automatic testing process, switches to after refrigeration mode the first force value of corresponding electrical equipment when first the aperture of detected electrons expansion valve is the first opening value.Then control electric expansion valve and close to after the second opening value, the second force value of detected electrons expansion valve corresponding electrical equipment in the time of the second opening value.According to electric expansion valve, respectively when the first opening value and the second opening value, corresponding the first force value of electrical equipment and the second force value, judge that whether electric expansion valve is normal.In carrying out electric expansion valve opening action (aperture that is electric expansion valve is the first opening value) detection, also realize the detection of electric expansion valve closing motion (aperture that is electric expansion valve is the second opening value).Effectively solved existing electric expansion valve detect can not detected electrons expansion valve closing motion, and then can not realize the problem of the validity that electric expansion valve detects.
Wherein, while being the first opening value due to electronic expansion valve opening, electric expansion valve is full-gear; And the aperture of electric expansion valve is while being the second opening value, electric expansion valve is close to the state of closing, and therefore the second opening value is less than the first opening value.
It should be noted that, the electrical equipment that electric expansion valve is installed can be air-conditioning system, is specially: band communication is frequency machine (determining cabinet-type air conditioner frequently containing the automatic test of band communication) surely.In the time that to band communication, machine is tested automatically frequently surely, its testing procedure comprises: step S000, setup test; Step S001, refrigeration test; Step S002, the hot power-off of the refrigeration transformation of ownership; Step S003, heat test; Step S004, heat the cold power-off of the transformation of ownership; Step S005, refrigeration test; Step S006, carry out refrigerant recovering; Step S007, shutdown.
According to above-mentioned with the communication automatic testing procedure of machine frequently surely, when band communication surely frequently machine enter step S005, when refrigeration test, after the surely frequently machine-processed lifting/lowering of band communication is frequently stable, its corresponding pressure is relatively stable.Therefore, can in step S005, increase the detection of electric expansion valve.By opening and closing electric expansion valve, and according to opening and closing when electric expansion valve, the difference of the pressure of electrical equipment, detects electric expansion valve.
It detects when not only having realized electric expansion valve opening action and closing motion by the detection of electric expansion valve being embedded in the automatic testing process of electrical equipment, has also shortened the detection time of electric expansion valve.Meanwhile, the detection of other parameters to electrical equipment also can not exert an influence, and then can not cause the problem of electrical equipment wrong report fault.
Referring to Fig. 2 and Fig. 3, it should be noted that, by opening and closing electric expansion valve, and according to the difference of pressure that opens and closes electrical equipment corresponding when electric expansion valve, electric expansion valve is detected, i.e. step S300, according to electric expansion valve respectively when the first opening value and the second opening value, the first force value and second force value of corresponding electrical equipment, judge that whether electric expansion valve is normal, can judge by the relation between the first force value and the second force value.Be specially:
Step S310, judges whether the second force value is less than or equal to 85% of the first force value.
Step S320, when judge the second force value be less than or equal to the first force value 85% time, electric expansion valve is normal, the aperture that can control electric expansion valve returns to the first opening value M1, makes electrical equipment enter next test phase, as reclaim etc.
Step S330, when judge the second force value be greater than the first force value 85% time, electric expansion valve is abnormal, and electric expansion valve is carried out to fault detect, after electric expansion valve is normal, makes electrical equipment enter next test phase.
Wherein, when the aperture in the time that electric expansion valve is opened is the first opening value M1, the first force value of its corresponding electrical equipment is P1.In the time that electric expansion valve closes to the second opening value M2, the second force value of its corresponding electrical equipment is P2.Because the value of the second opening value M2 is 80 steps, or the value of the second opening value M2 equals 85% (being M2=0.85M1) of the first opening value M1.Therefore,, in the time that electric expansion valve is normal, should there is following relation: P2≤0.85P1 in the first pressure value P 1 and the second pressure value P 2.
Therefore,, by judging whether P2 is less than or equal to 0.85P1, in the time of P2≤0.85P1, show that electric expansion valve is normal.Owing to being to be embedded in the automatic testing process of electrical equipment to carry out to the detection of electric expansion valve, therefore, when detecting electric expansion valve when normal, the aperture that can control electronic expansion returns to the first opening value, makes electrical equipment enter next test phase.
In the time of P2>0.85P1, show that electric expansion valve is abnormal.Can carry out malfunction elimination to electric expansion valve, after making electric expansion valve recover normally, control electrical equipment and enter next test phase.
Referring to Fig. 2 and Fig. 3, in the time that electric expansion valve is detected, step S100, when being installed, the electrical equipment of electric expansion valve switches to after refrigeration mode, when the aperture of detected electrons expansion valve is the first opening value, the first force value of electrical equipment, comprises the steps:
Step S110, when electrical equipment switches to after refrigeration mode, the aperture of recorded electronic expansion valve is the first opening value M1.By the aperture of recorded electronic expansion valve, taking ensure electric expansion valve when the first opening value M1 as full-gear.
Step S120, when electrical equipment switches to after refrigeration mode the first Preset Time, when the aperture of detected electrons expansion valve is the first opening value M1, the first pressure value P 1 of electrical equipment.
When electrical equipment switches to after refrigeration mode, need to move certain hour to frequency reducing final stage, reach running frequency stable after, the pressure of electrical equipment also tends towards stability.Now, electric expansion valve still remains the full-gear of the first opening value M1, and simultaneously the pressure of electrical equipment is also in steady state (SS), can detected electrons expansion valve in the time of the first opening value M1 full-gear, the first pressure value P 1 of electrical equipment.Can judge electric expansion valve according to the first pressure value P 1 of electrical equipment and whether reach full-gear, and then realize the detection of the opening action of electric expansion valve.
Wherein, the value of the first Preset Time is 30s.It should be noted that, the value of the first Preset Time also can be set according to actual conditions, as long as ensure to switch to after refrigeration mode at electrical equipment, it is at electric expansion valve during at the first opening value M1, and the pressure of electrical equipment is in steady state (SS).
In the time detecting that the aperture of electric expansion valve is the first opening value M1 after the first pressure value P 1 of corresponding electrical equipment, need to control electric expansion valve and close to the second opening value M2, taking the second pressure value P 2 of the aperture of detected electrons expansion valve corresponding electrical equipment during as the second opening value M2.Thereby carry out whether normally detection of electric expansion valve by the first pressure value P 1 and the second pressure value P 2 that detect.
Control electric expansion valve closes to the second opening value M2 and can realize by two kinds of modes.One is system test real time record value mode; Its two, be empirical value mode.
Referring to Fig. 2, adopt system test real time record value mode control electric expansion valve to close to the second opening value M2, specifically comprise the steps:
Step S210, input electronic expansion valve opening fixed value is to the control chip of electrical equipment.
Step S220, the control chip of electrical equipment, according to electronic expansion valve opening fixed value, is controlled electric expansion valve and is closed to the second opening value M2.
Wherein, electronic expansion valve opening fixed value is 80 steps.
It,, by the control chip input electronic expansion valve opening fixed value to electrical equipment, makes the control chip of electrical equipment according to the electronic expansion valve opening fixed value receiving, and controls electric expansion valve and closes to the second opening value M2.Wherein, electronic expansion valve opening fixed value is 80 steps, is also 80 steps thereby the control chip control electric expansion valve of electrical equipment closes to the second opening value M2.Now, electric expansion valve is close to closed condition.
Control chip control electric expansion valve at electrical equipment closes to the second opening value M2, controls in the process of electric expansion valve close to closed condition, and the pressure of electrical equipment declines gradually.When the pressure drop of electrical equipment is during to steady state (SS), now, the pressure of electrical equipment is the second pressure value P 2.By detecting now the second pressure value P 2 of electrical equipment, and with electric expansion valve when the first opening value M1 (being full-gear), 85% of the first pressure value P 1 of the electrical equipment detecting contrasts.
In the time that the second pressure value P 2 of the electrical equipment detecting is less than or equal to 85% (being P2≤0.85P1) of the first pressure value P 1 of electrical equipment, show that electric expansion valve is normal operating conditions.In the time that the second pressure value P 2 of the electrical equipment detecting is greater than 85% (P2>0.85P1) of the first pressure value P 1 of electrical equipment, show that electric expansion valve breaks down, can point out testing staff to carry out the trouble hunting of electric expansion valve by modes such as warnings.Ensure the safety and reliability of electrical equipment.
Referring to Fig. 3, adopt empirical value mode control electric expansion valve to close to the second opening value M2, specifically comprise the steps:
Step S230, input electronic expansion valve opening empirical value is to the control chip of electrical equipment.
Step S240, the control chip of electrical equipment, according to electronic expansion valve opening empirical value, is controlled electric expansion valve and is closed to the second opening value M2.
Wherein, electronic expansion valve opening empirical value is more than or equal to 70% of the first opening value M1, and is less than or equal to 90% of the first opening value M1.Be preferably, electronic expansion valve opening empirical value equals 85% of the first opening value M1.
It,, by the control chip input electronic expansion valve opening empirical value to electrical equipment, makes the control chip of electrical equipment according to the electronic expansion valve opening empirical value receiving, and controls electric expansion valve and closes to the second opening value M2.Wherein, electronic expansion valve opening empirical value is more than or equal to 70% of the first opening value M1, and is less than or equal to 90% of the first opening value M1.Be preferably, equal 85% of the first opening value M1.Thereby the control chip control electric expansion valve that reaches electrical equipment closes to 85% (being M2=0.85M1) object that the second opening value M2 is also the first opening value M1.Now, electric expansion valve is equally close to closed condition.
By detecting now the second pressure value P 2 of electrical equipment, and with electric expansion valve when the first opening value M1 (being full-gear), 85% of the first pressure value P 1 of the electrical equipment detecting contrasts, realize equally the whether normal judgement of electric expansion valve, and then detected when having realized electric expansion valve opening action and closing motion.
Accordingly, for realizing above-mentioned any electric expansion valve detection method, the present invention also provides a kind of electric expansion valve detection system.Because principle of work and the electric expansion valve detection method principle provided by the invention of electric expansion valve detection system provided by the invention are same or similar, therefore repeat part and repeat no more.
As the electric expansion valve detection system of a specific embodiment, comprise detection frock, detect frock and be connected with the electrical equipment communication that electric expansion valve is installed.
Detect frock and comprise detection module, control module and judge module.
Detection module, for switching to after refrigeration mode when electrical equipment, the first force value of corresponding electrical equipment when the aperture of detected electrons expansion valve is the first opening value.
Control module, closes to the second opening value for controlling electric expansion valve.Wherein, control module can be by the control chip input order signal to electrical equipment, the control chip that makes electrical equipment, according to the command signal receiving, is controlled electric expansion valve and is carried out corresponding action, finally realizes control module control electric expansion valve and close to the object of the second opening value.
Detection module, the second force value of corresponding electrical equipment while being also the second opening value for detection of the aperture of electric expansion valve.
Judge module, for according to the first force value and the second force value, judges that whether electric expansion valve is normal.
Wherein, the second opening value is less than the first opening value.
It should be noted that, detection module can be pressure transducer.By pressure transducer being arranged on the pipe laying of electric expansion valve, by the pressure on the pipe laying of detected electrons expansion valve, when realizing detected electrons expansion valve and being respectively the first opening value and the second opening value, the first force value that electrical equipment is corresponding and the object of the second force value.Simple to operate, and cost is lower.
Wherein, judge module, for judging whether the second force value is less than or equal to 85% of the first force value.
When the second force value be less than or equal to the first force value 85% time, show that electric expansion valve is normal.
When the second force value be greater than the first force value 85% time, show that electric expansion valve is abnormal.
Therein in an embodiment, control module, also, for judging electric expansion valve when judging unit when normal, controls electric expansion valve and returns to the first opening value.
When judging unit is judged electric expansion valve when normal, control module can be by inputting the command signal of the first opening value to the control chip of electrical equipment, thereby make the control chip of electrical equipment according to the command signal of the first opening value receiving, control electric expansion valve and return to the first opening value by the second opening value, thereby make electrical equipment normally enter next test phase.Ensure the normal test automatically of electrical equipment.
When electrical equipment switches to after refrigeration mode, when the aperture of electric expansion valve is the first opening value, when detection module (pressure transducer) detects the first force value of electrical equipment, detects frock and also comprise logging modle.
Logging modle, for switching to after refrigeration mode when electrical equipment, the aperture of recorded electronic expansion valve is the first opening value.Be the first opening value by the aperture of recorded electronic expansion valve, taking detected electrons expansion valve, whether as full-gear, the aperture (the first opening value) that has ensured electric expansion valve is full-gear.
Detection module, for switching to when electrical equipment after refrigeration mode the first Preset Time, when the aperture of detected electrons expansion valve is the first opening value, the first force value of electrical equipment.
Wherein, the value of the first Preset Time is 30s.
As a kind of embodiment, control module comprises the first load module.
The first load module, for inputting the control chip of electronic expansion valve opening fixed value to electrical equipment.
The control chip of electrical equipment, according to electronic expansion valve opening fixed value, is controlled electric expansion valve and is closed to the second opening value.
Wherein, electronic expansion valve opening fixed value is 80 steps.
By adopting system test real time record value mode, switch to after refrigeration mode (being step S005) at electrical equipment, detect frock by being connected with electrical equipment communication, recorded the first opening value M1 of the electric expansion valve under electrical equipment normal condition by the logging modle in detection frock.In electrical equipment frequency reducing final stage, after frequency stabilization, detected the first pressure value P 1 of this moment electrical equipment by detection module (pressure transducer).
Then the control chip input electronic expansion valve opening fixed value (80 step) to electrical equipment by the first load module in the control module of detection frock, the aperture that makes electric expansion valve be the second opening value M2 (wherein, the second opening value M2 is similarly 80 steps), thereby the control chip that makes electrical equipment starts electric expansion valve to carry out control action, and the pressure of electrical equipment can decline gradually.And by the second pressure value P 2 after the pressure level-off of detection module (pressure transducer) the detection electrical equipment in detection frock.
In the time of pressure P 2≤0.85P1, think that electric expansion valve belongs to normal operating conditions, the control module detecting in frock sends the control chip of original opening value (i.e. the first opening value M1) to electrical equipment, electric expansion valve recovers original aperture (the first opening value M1), thereby make electrical equipment enter next testing process, reclaim.If pressure cannot meet P2≤0.85P1 (being P2>0.85P1), detect frock report electric expansion valve abnormal failure, finally realize the quick test that electric expansion valve detects.
As another kind of embodiment, detect frock and also comprise the second load module.
The second load module, for inputting the control chip of electronic expansion valve opening empirical value to electrical equipment.
The control chip of electrical equipment, according to electronic expansion valve opening empirical value, is controlled electric expansion valve and is closed to the second opening value M2.
Wherein, electronic expansion valve opening empirical value is more than or equal to 70% of the first opening value M1, and is less than or equal to 90% of the first opening value M1.
Adopt empirical value mode, switch to after refrigeration mode (being step S005) at electrical equipment, detect frock by being connected with electrical equipment communication, recorded the first opening value M1 of the electric expansion valve under electrical equipment normal condition by the logging modle in detection frock.In electrical equipment frequency reducing final stage, after frequency stabilization, detected the first pressure value P 1 of this moment electrical equipment by detection module (pressure transducer).
Then (electronic expansion valve opening empirical value is more than or equal to 70% of the first opening value M1, and is less than or equal to 90% of the first opening value M1 to input electronic expansion valve opening empirical value by the first load module in the control module of detection frock to the control chip of electrical equipment.Be preferably the first opening value M1 85%), the aperture that makes electric expansion valve be the second opening value M2 (wherein, the second opening value M2 equals electronic expansion valve opening empirical value), thereby the control chip that makes electrical equipment starts electric expansion valve to carry out control action, and the pressure of electrical equipment can decline gradually.And by the second pressure value P 2 after the pressure level-off of detection module (pressure transducer) the detection electrical equipment in detection frock.
In the time of pressure P 2≤0.85P1, think that electric expansion valve belongs to normal operating conditions, the control module detecting in frock sends the control chip of original opening value (i.e. the first opening value M1) to electrical equipment, electric expansion valve recovers original aperture (the first opening value M1), thereby make electrical equipment enter next testing process, reclaim.If pressure cannot meet P2≤0.85P1 (being P2>0.85P1), detect frock report electric expansion valve abnormal failure, finally realize the quick test that electric expansion valve detects.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (13)
1. an electric expansion valve detection method, is characterized in that, comprises the steps:
When being installed, the electrical equipment of electric expansion valve switches to after refrigeration mode the first force value of corresponding described electrical equipment when the aperture that detects described electric expansion valve is the first opening value;
Control described electric expansion valve and close to the second opening value, and the second force value of the aperture that detects described electric expansion valve corresponding described electrical equipment while being described the second opening value;
According to described the first force value and described the second force value, judge that whether described electric expansion valve is normal;
Wherein, described the second opening value is less than described the first opening value.
2. electric expansion valve detection method according to claim 1, is characterized in that, described according to described the first force value and described the second force value, judges that whether described electric expansion valve is normal, comprises the steps:
Judge whether described the second force value is less than or equal to 85% of described the first force value;
When described the second force value be less than or equal to described the first force value 85% time, described electric expansion valve is normal;
When described the second force value be greater than described the first force value 85% time, described electric expansion valve is abnormal.
3. electric expansion valve detection method according to claim 2, is characterized in that, also comprises the steps:
In the time that described electric expansion valve is normal, the aperture of controlling described electric expansion valve returns to described the first opening value.
4. electric expansion valve detection method according to claim 1, it is characterized in that, describedly when being installed, the electrical equipment of electric expansion valve switches to after refrigeration mode, when the aperture that detects described electric expansion valve is the first opening value, the first force value of corresponding described electrical equipment, comprises the steps:
When described electrical equipment switches to after described refrigeration mode, the aperture that records described electric expansion valve is described the first opening value;
When described electrical equipment switches to after described refrigeration mode the first Preset Time, described first force value of corresponding described electrical equipment when the aperture that detects described electric expansion valve is described the first opening value;
Wherein, the value of described the first Preset Time is 30s.
5. electric expansion valve detection method according to claim 4, is characterized in that, described control electric expansion valve closes to the second opening value, comprises the steps:
Input electronic expansion valve opening fixed value is to the control chip of described electrical equipment;
The control chip of described electrical equipment, according to described electronic expansion valve opening fixed value, is controlled described electric expansion valve and is closed to described the second opening value;
Wherein, described electronic expansion valve opening fixed value is 80 steps.
6. electric expansion valve detection method according to claim 4, is characterized in that, controls described electric expansion valve and closes to the second opening value, comprises the steps:
Input electronic expansion valve opening empirical value is to the control chip of described electrical equipment;
The control chip of described electrical equipment, according to described electronic expansion valve opening empirical value, is controlled described electric expansion valve and is closed to described the second opening value;
Wherein, described electronic expansion valve opening empirical value is more than or equal to 70% of described the first opening value, and is less than or equal to 90% of described the first opening value.
7. an electric expansion valve detection system, is characterized in that, comprises detection frock, and described detection frock is connected with the electrical equipment communication that electric expansion valve is installed;
Described detection frock comprises detection module, control module and judge module;
Described detection module, for switching to after refrigeration mode when described electrical equipment, the first force value of corresponding described electrical equipment when the aperture that detects described electric expansion valve is the first opening value;
Described control module, closes to the second opening value for controlling described electric expansion valve;
Described detection module, the second force value of corresponding described electrical equipment while being also described the second opening value for detection of the aperture of described electric expansion valve;
Described judge module, for according to described the first force value and described the second force value, judges that whether described electric expansion valve is normal;
Wherein, described the second opening value is less than described the first opening value.
8. electric expansion valve detection system according to claim 7, is characterized in that, described judge module, for judging whether described the second force value is less than or equal to 85% of described the first force value;
When described the second force value be less than or equal to described the first force value 85% time, described electric expansion valve is normal;
When described the second force value be greater than described the first force value 85% time, described electric expansion valve is abnormal.
9. electric expansion valve detection system according to claim 8, is characterized in that, described control module, and also, for judging described electric expansion valve when described judging unit when normal, the aperture of controlling described electric expansion valve returns to described the first opening value.
10. electric expansion valve detection system according to claim 7, is characterized in that, described detection frock also comprises logging modle;
Described logging modle, for switching to after described refrigeration mode when described electrical equipment, the aperture that records described electric expansion valve is described the first opening value;
Described detection module, for switching to when described electrical equipment after described refrigeration mode the first Preset Time, described first force value of corresponding described electrical equipment when the aperture that detects described electric expansion valve is described the first opening value;
Wherein, the value of described the first Preset Time is 30s.
11. electric expansion valve detection systems according to claim 10, is characterized in that, described control module comprises the first load module;
Described the first load module, for inputting the control chip of electronic expansion valve opening fixed value to described electrical equipment;
The control chip of described electrical equipment, according to described electronic expansion valve opening fixed value, is controlled described electric expansion valve and is closed to described the second opening value;
Wherein, described electronic expansion valve opening fixed value is 80 steps.
12. electric expansion valve detection systems according to claim 10, is characterized in that, described detection frock also comprises the second load module;
Described the second load module, for inputting the control chip of electronic expansion valve opening empirical value to described electrical equipment;
The control chip of described electrical equipment, according to described electronic expansion valve opening empirical value, is controlled described electric expansion valve and is closed to described the second opening value;
Wherein, described electronic expansion valve opening empirical value is more than or equal to 70% of described the first opening value, and is less than or equal to 90% of described the first opening value.
13. according to the electric expansion valve detection system described in claim 7 to 12 any one, it is characterized in that, described detection module is pressure transducer; Described pressure transducer is arranged on the pipe laying of described electric expansion valve.
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| CN106404371A (en) * | 2016-10-10 | 2017-02-15 | 广东美的暖通设备有限公司 | Electronic expansion valve detection method, device and air conditioning system |
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| CN106500238A (en) * | 2016-09-12 | 2017-03-15 | 珠海格力电器股份有限公司 | Electric expansion valve fault detection method, device and multi-connected machine device systems |
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| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| CN108613335A (en) * | 2018-03-12 | 2018-10-02 | 珠海格力电器股份有限公司 | Fault detection method, device, storage medium and the processor of air-conditioning |
| CN109813020A (en) * | 2019-02-20 | 2019-05-28 | 珠海格力电器股份有限公司 | Electric expansion valve choke detecting method, heat pump system control method, electric control method, electric appliance and computer readable storage medium |
| CN110500710A (en) * | 2019-07-30 | 2019-11-26 | 广东申菱环境系统股份有限公司 | A kind of air-conditioning fault self-diagnosis method |
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