CN110186154A - The defrosting method and device of air-conditioning - Google Patents
The defrosting method and device of air-conditioning Download PDFInfo
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- CN110186154A CN110186154A CN201910468096.7A CN201910468096A CN110186154A CN 110186154 A CN110186154 A CN 110186154A CN 201910468096 A CN201910468096 A CN 201910468096A CN 110186154 A CN110186154 A CN 110186154A
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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
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to air-conditioning technical fields, present invention seek to address that problem of the existing defrosting method to the frosting state judgement inaccuracy of air-conditioning, it is proposed a kind of defrosting method of air-conditioning, comprising the following steps: establish the functional relation on outdoor heat exchanger refrigerant pipe between each detection temperature and the second temperature at outdoor heat exchanger refrigerant inlet and the third temperature at refrigerant exit of multiple test points；When being run under air-conditioning is in heating mode, the first temperature and the second temperature at the first humidity and outdoor heat exchanger refrigerant inlet of acquisition outdoor heat exchanger air inlet and the third temperature at outdoor unit heat exchanger refrigerant exit；Each detection temperature on outdoor heat exchanger refrigerant pipe is calculated according to second temperature, third temperature and functional relation；The frosting state that air-conditioning is judged according to each detection temperature, the first temperature and the first humidity, controls air-conditioning according to frosting state and enters defrost process.The present invention can be realized the frosting state to air-conditioning and accurately be judged.
Description
Technical field
The present invention relates to air-conditioning technical fields, relate in particular to the defrosting method and device of a kind of air-conditioning.
Background technique
In air-conditioning heating operational process, outdoor heat exchanger is run as condenser, at this point, since outdoor temperature is too low, room
External heat exchanger carries out heat absorption condensation and is easy to cause outdoor heat exchanger frosting, and therefore, it is necessary to carry out defrosting operation to outdoor heat exchanger.
In the related technology, enter defrost process to control air-conditioning, whether is the usual temperature by judging outdoor heat exchanger
Reach preset temperature, to judge whether air-conditioning enters defrost process.But the relevant technologies the problem is that, since air-conditioning makes
Environmental factor is different, is difficult the unified decision condition for entering defrost process, causes appearance or mistake in air-conditioning use process
It is early to enter defrost process, the problem of causing because reducing air-conditioning heating efficiency, and influencing user experience or enter defrost stream too late
Journey causes outdoor heat exchanger frosting blocked up, and the time of complete defrost is longer, causes the fluctuation of user's sendible temperature larger, meanwhile, by
It is blocked up in frosting, if defrost is not thorough, the problem for being also easy to cause operation of air conditioner heating time longer heating effect poorer, even
Damage air conditioner.
Patent CN201811163184.8 discloses a kind of air-conditioning and its defrosting method and device, mainly includes following technology
Scheme: when running under the air-conditioning is in heating mode, the second temperature and outdoor heat exchange of outdoor heat exchanger air inlet are obtained
The first humidity at device refrigerant exit；According to the second temperature and first humidity, determine current locating for the air-conditioning
Frosting section, and identify that the air-conditioning is in frosting state according to the frosting section, and to described in preset duration
The air conditioning capacity of air-conditioning is detected；According to the air conditioning capacity detected, judge that the current frosting velocity of the air-conditioning is
It is no to exceed preset frosting velocity；When the current frosting velocity exceeds preset frosting velocity, then the air-conditioning is controlled
It into defrost process, realizes and frosting situation is judged according to air conditioning capacity, so as to timely enter defrost process, guaranteeing sky
In the case where modulating thermal effect, defrosting effect is effectively improved.
In the defrosting method of above-mentioned air-conditioning, the temperature of outdoor heat exchanger air inlet is obtained using Temperature Humidity Sensor, and
Temperature and humidity at refrigerant exit judges frosting section, although can understand refrigerant exit according to the temperature and humidity at refrigerant exit
The frosting state at place, but can not be according to frosting state herein come the frosting of the entire outdoor heat exchanger refrigerant pipe of Accurate Prediction
State.Such as under air-conditioning heating mode operation conditions, it is that outdoor unit changes that the refrigerant inlet temperature of outdoor heat exchanger, which is often below,
Temperature value at hot device refrigerant exit, thus when detect enter frosting state at refrigerant exit when, frosting shape at refrigerant inlet
State may be than heat exchange efficiency that is more serious, or even having affected outdoor heat exchanger.So in practical air-conditioning heating work
In work, if Temperature Humidity Sensor is provided only on position at the one of heat exchanger, the error in judgement of frosting state will greatly occur,
Lead to that defrost process early enters or evening enters.
Summary of the invention
Present invention seek to address that existing defrosting method proposes one kind to the problem of the frosting state judgement inaccuracy of air-conditioning
The defrosting method and device of air-conditioning.
The technical proposal adopted by the invention to solve the above technical problems is that: the defrosting method of air-conditioning, comprising the following steps:
Step 1. establishes the corresponding each detection temperature of multiple test points on outdoor heat exchanger refrigerant pipe and outdoor heat exchanger
The functional relation between the third temperature at second temperature and refrigerant exit at refrigerant inlet；
Step 2. obtains the first temperature and first of outdoor heat exchanger air inlet when running under air-conditioning is in heating mode
The third temperature at second temperature and outdoor unit heat exchanger refrigerant exit at humidity and outdoor heat exchanger refrigerant inlet；
Step 3. calculates outdoor heat exchanger refrigerant pipe according to the second temperature, third temperature and the functional relation
The above corresponding each detection temperature of multiple test points；
Step 4. is according to the corresponding each detection temperature of test points multiple on outdoor heat exchanger refrigerant pipe, the first temperature and
One humidity judges the frosting state of air-conditioning, controls air-conditioning according to the frosting state and enters defrost process.
It further, is the foundation for realizing functional relation, it is described to establish multiple test points on outdoor heat exchanger refrigerant pipe
Between second temperature at corresponding each detection temperature and outdoor heat exchanger refrigerant inlet and the third temperature at refrigerant exit
Functional relation includes:
In experimental stage, air-conditioning is under heating mode when running, and obtains multiple detections on outdoor heat exchanger refrigerant pipe
Second temperature at the corresponding each detection temperature of point, outdoor heat exchanger refrigerant inlet and the third temperature at refrigerant exit；
The corresponding each detection temperature of each test point is established respectively according to each detection temperature, second temperature and third temperature
It, and will be described with the functional relation between the second temperature at outdoor heat exchanger refrigerant inlet and the third temperature at refrigerant exit
Functional relation is stored to the control system of air-conditioning.
Further, to realize the acquisition of temperature to establish functional relation, on the acquisition outdoor heat exchanger refrigerant pipe
Second temperature at the corresponding each detection temperature of multiple test points, outdoor heat exchanger refrigerant inlet and the third temperature at refrigerant exit
Degree includes:
Multiple temperature sensors are arranged in multiple test points on the refrigerant pipe of the outdoor heat exchanger, outdoor heat exchanger
Second temperature sensor is set at refrigerant inlet, third temperature sensor is set at the refrigerant exit of outdoor heat exchanger；
Obtain each test point temperature of the corresponding multiple temperature sensors in multiple monitoring points, second temperature sensor second
The third temperature of temperature and third temperature sensor.
Further, to realize frosting state of the acquisition of temperature to judge air-conditioning, the acquisition outdoor heat exchanger is entered the wind
Second temperature and outdoor heat exchanger refrigerant exit at the first temperature and the first humidity and outdoor heat exchanger refrigerant inlet of mouth
The third temperature at place includes:
In the air inlet of the outdoor heat exchanger, the first temperature sensor and the first humidity sensor, outdoor heat exchanger are set
Refrigerant inlet at second temperature sensor is set, third temperature sensor is set at the refrigerant exit of outdoor heat exchanger；
Obtain the first temperature of the first temperature sensor, the first humidity, the second temperature sensor of the first humidity sensor
Second temperature and third temperature sensor third temperature.
Further, described according to multiple on outdoor heat exchanger refrigerant pipe to realize the judgement to air-conditioning frosting state
The corresponding each detection temperature of test point, the first temperature and the first humidity judge that the frosting state of air-conditioning includes:
According to first temperature, the dew-point temperature under first humidity is obtained；
The detection temperature of each test point and first temperature difference of the dew-point temperature and the first temperature and institute are obtained respectively
State second temperature difference of dew-point temperature；
The frosting state of each test point is judged according to first temperature difference and second temperature difference.
Further, described according to first temperature difference and the second temperature to realize the judgement to the frosting state of each test point
Difference judges that the frosting state of each test point includes:
If first temperature difference is in the first preset range, and second temperature difference is in the second preset range, then judges
The test point is in frosting state；
If the quantity of the test point in frosting state is greater than the first preset value, judge that air-conditioning is in frosting state.
It is described to be sentenced according to first temperature difference and second temperature difference to further realize the judgement to the frosting state of each test point
Break the frosting state of each test point further include:
If first temperature difference is in the first preset range, and second temperature difference is in third preset range, then judges
The test point is in condensation state；
If the quantity of the test point in condensation state is greater than the second preset value, judge that air-conditioning is in condensation state.
Further, described that defrost process is entered also according to the frosting state of air-conditioning control air-conditioning to avoid air-conditioning frosting
Include:
If the air-conditioning is in frosting state, controls the air-conditioning and enter defrost process；
If the air-conditioning is in condensation state, controls the air-conditioning and enter inhibition frosting process.
Further, be realize inhibit air-conditioning frosting, the inhibitions frosting process include: raising outdoor unit rotation speed of fan,
It reduces compressor frequency and/or reduces refrigerant circulation flow.
The present invention also proposes a kind of defrosting device of air-conditioning, comprising:
Unit is established, for establishing the corresponding each detection temperature of multiple test points on outdoor heat exchanger refrigerant pipe and outdoor
The functional relation between the third temperature at second temperature and refrigerant exit at heat exchanger refrigerant inlet；
Acquiring unit, for when running under air-conditioning is in heating mode, obtaining the first temperature of outdoor heat exchanger air inlet
Second temperature at degree and the first humidity and outdoor heat exchanger refrigerant inlet and the third at outdoor unit heat exchanger refrigerant exit
Temperature；
Computing unit, for calculating outdoor heat exchanger according to the second temperature, third temperature and the functional relation
The corresponding each detection temperature of multiple test points on refrigerant pipe；
Control unit, for according to the corresponding each detection temperature of test points multiple on outdoor heat exchanger refrigerant pipe, first
Temperature and the first humidity judge the frosting state of air-conditioning, control air-conditioning according to the frosting state and enter defrost process.
The beneficial effects of the present invention are: the defrosting method of air-conditioning of the present invention, passes through the refrigerant pipe of outdoor heat exchanger
Multiple test points in road corresponding each detection temperature judges the frosting state of air-conditioning, can judge outdoor heat exchanger refrigerant comprehensively
The frosting state of pipeline finds the test point of the frosting at first of the refrigerant pipe of outdoor heat exchanger in time and is in frosting state
Test point quantity, realization the frosting state of air-conditioning is accurately judged, and then control air-conditioning enter defrost process,
In the case where guaranteeing air-conditioning heating effect, the defrosting effect of air-conditioning is improved.
Detailed description of the invention
Fig. 1 is the flow diagram of the defrosting method of air-conditioning described in the embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are described in detail below in conjunction with attached drawing.
The defrosting method of air-conditioning of the present invention, comprising the following steps: step 1. establishes outdoor heat exchanger refrigerant pipe
The at second temperature and refrigerant exit at the corresponding each detection temperature of upper multiple test points and outdoor heat exchanger refrigerant inlet
Functional relation between three temperature；Step 2. obtains outdoor heat exchanger air inlet when running under air-conditioning is in heating mode
At second temperature and outdoor unit heat exchanger refrigerant exit at first temperature and the first humidity and outdoor heat exchanger refrigerant inlet
Third temperature；Step 3. calculates outdoor heat exchanger refrigerant according to the second temperature, third temperature and the functional relation
The corresponding each detection temperature of multiple test points on pipeline；Step 4. is corresponding according to test points multiple on outdoor heat exchanger refrigerant pipe
Each detection temperature, the first temperature and the first humidity judge the frosting state of air-conditioning, according to the frosting state control air-conditioning into
Enter defrost process.
Firstly, the experimental stage before air-conditioning factory, air-conditioning is under heating mode when running, in outdoor heat exchanger refrigerant
On pipeline, multiple test points are set, since outdoor heat exchanger refrigerant pipe is along the flow direction of refrigerant, temperature value is with certain speed
Rate decline, therefore, it is possible to be established at the corresponding each detection temperature of multiple temperature detecting points and outdoor heat exchanger refrigerant inlet accordingly
Second temperature and refrigerant exit at third temperature between functional relation, and the functional relation is saved to the control of air-conditioning
In system；In air-conditioning normally registers one's residence use process, air-conditioning is under heating mode when running, and obtains outdoor heat exchanger air inlet
The first temperature and the first humidity and outdoor heat exchanger refrigerant inlet at second temperature and outdoor unit heat exchanger refrigerant exit
The third temperature at place, according to the corresponding each detection temperature of second temperature and each test point of third temperature computation, according to each detection temperature
Degree, the first temperature and the first humidity determine the frosting state of air-conditioning, and then control air-conditioning and enter defrost process.
Embodiment
The defrosting method of air-conditioning described in the embodiment of the present invention, as shown in Figure 1, comprising the following steps:
Step S1. establishes the corresponding each detection temperature of multiple test points on outdoor heat exchanger refrigerant pipe and outdoor heat exchanger
The functional relation between the third temperature at second temperature and refrigerant exit at refrigerant inlet；
It is appreciated that step S1 be air-conditioning factory before experimental stage carry out, specifically, can be in the outdoor
Multiple test points are correspondingly arranged multiple temperature sensors on the refrigerant pipe of heat exchanger, are arranged at the refrigerant inlet of outdoor heat exchanger
Second temperature sensor third temperature sensor is arranged at the refrigerant exit of outdoor heat exchanger, in the case where air-conditioning is in heating mode
When operation, each detection temperature of the corresponding multiple temperature sensors in multiple monitoring points, the second temperature of second temperature sensor are obtained
The third temperature of degree and third temperature sensor is built respectively according to each detection temperature, second temperature and the third temperature of acquisition
Found the second temperature and outdoor heat exchanger refrigerant exit at the corresponding detection temperature of each test point and outdoor heat exchanger refrigerant inlet
Functional relation between the third temperature at place, and functional relation is stored to the control system of air-conditioning.
Wherein, the quantity of test point can be configured according to the actual situation on outdoor heat exchanger refrigerant pipe, for example, can
To be uniformly arranged multiple temperature sensors on outdoor heat exchanger refrigerant pipe, the position of each temperature sensor is i.e. one corresponding
Test point.
Step S2. obtains the first temperature and the of outdoor heat exchanger air inlet when running under air-conditioning is in heating mode
The third temperature at second temperature and outdoor unit heat exchanger refrigerant exit at one humidity and outdoor heat exchanger refrigerant inlet；
It is appreciated that normally registering one's residence in use process in air-conditioning, the first temperature can be set in the air inlet of outdoor heat exchanger
Sensor and the first humidity sensor are spent, second temperature sensor is set at the refrigerant inlet of outdoor heat exchanger, is changed in outdoor
Third temperature sensor is set at the refrigerant exit of hot device, and then obtains the first temperature, the first humidity of the first temperature sensor
The third temperature of first humidity of sensor, the second temperature of second temperature sensor and third temperature sensor.
Step S3. calculates outdoor heat exchanger refrigerant pipe according to the second temperature, third temperature and the functional relation
The corresponding each detection temperature of multiple test points on road；
Specifically, the refrigerant exit of second temperature and outdoor heat exchanger at the refrigerant inlet for obtaining outdoor heat exchanger
After the third temperature at place, second temperature and third temperature are substituted into and save the Ji Keji into the functional relation of air-conditioner control system
Calculation obtains the corresponding each detection temperature of each test point.
Step S4. according to the corresponding each detection temperature of test points multiple on outdoor heat exchanger refrigerant pipe, the first temperature and
First humidity judges the frosting state of air-conditioning, controls air-conditioning according to the frosting state and enters defrost process.
Wherein, the first temperature and the first humidity are used to obtain the dew-point temperature under the first humidity, and each test point is corresponding each
Monitoring temperature is used to judge whether corresponding test point is in frosting state according to dew-point temperature.Specifically, according to the first temperature
Degree and the first humidity obtain corresponding water capacity using the method for interpolation, further according to water capacity inquiry when relative humidity reaches
Air themperature when 100%, this is the dew-point temperature under the first humidity, then obtains the corresponding detection temperature of each test point
With the first temperature of the air inlet of first temperature difference and outdoor heat exchanger of dew-point temperature and second temperature difference of dew-point temperature, and
The frosting state of corresponding test point is judged according to first temperature difference and second temperature difference.
Specifically, be in the first preset range when first temperature difference, and when second temperature difference is in the second preset range, then sentence
Disconnected corresponding test point be in frosting state, and when first temperature difference is in the first preset range, and second temperature difference is in the default model of third
When enclosing, then judges that corresponding test point is in condensation state, when first temperature difference is in four preset ranges, then judge corresponding inspection
Measuring point is in non-frosting state, wherein the first preset range, the second preset range, third preset range and the 4th preset range
It is arranged according to the actual situation, under normal circumstances, the temperature difference that the temperature difference absolute value of the second preset range is less than third preset range is exhausted
To value.
After the frosting state for judging all test points by the above method, when the quantity of the test point in frosting state is big
When the first preset value, then judge that air-conditioning is in frosting state, issues defrosting instruction control air-conditioning at this time and enter defrost process, when
When the quantity of test point in condensation state is greater than the second preset value, then judge that air-conditioning is in condensation state, issues suppression at this time
Frosting instruction control air-conditioning processed, which enters, inhibits frosting process, inhibits frosting process can be by improving outdoor unit rotation speed of fan, drop
The modes such as low compressor frequency and/or reduction refrigerant circulation flow carry out, can be preferential in order to guarantee the heating effect of air-conditioning
Frosting is inhibited using the revolving speed for improving outdoor unit blower.
Wherein, the first preset value and the second preset value are arranged according to the actual situation, the number of the test point in frosting state
Amount is more, indicates that air-conditioning frosting is more serious, and the quantity of the test point in condensation state is more, indicates that air-conditioning condensation is more serious,
It can also be according to the quantity of the test point in frosting state and the quantity of the test point in condensation state come accurate judgement sky
The frosting state grade of tune, and then frost layer is fast and accurately inhibited to occur and expand.
Based on the above-mentioned technical proposal, the embodiment of the present invention also proposes a kind of defrosting device of air-conditioning, comprising:
Unit is established, for establishing the corresponding each detection temperature of multiple test points on outdoor heat exchanger refrigerant pipe and outdoor
The functional relation between the third temperature at second temperature and refrigerant exit at heat exchanger refrigerant inlet；
Acquiring unit, for when running under air-conditioning is in heating mode, obtaining the first temperature of outdoor heat exchanger air inlet
Second temperature at degree and the first humidity and outdoor heat exchanger refrigerant inlet and the third at outdoor unit heat exchanger refrigerant exit
Temperature；
Computing unit, for calculating outdoor heat exchanger according to the second temperature, third temperature and the functional relation
The corresponding each detection temperature of multiple test points on refrigerant pipe；
Control unit, for according to the corresponding each detection temperature of test points multiple on outdoor heat exchanger refrigerant pipe, first
Temperature and the first humidity judge the frosting state of air-conditioning, control air-conditioning according to the frosting state and enter defrost process.
It is appreciated that the defrosting device of the air-conditioning as described in the embodiment of the present invention is for realizing the defrost of the air-conditioning
The device of method, for the device disclosed in the embodiment, since it is corresponded to the methods disclosed in the examples, so description
Relatively simple, related place illustrates referring to the part of method.Since the defrosting method of above-mentioned air-conditioning being capable of accurate judgement sky
The frosting state and then control air-conditioning of tune enter defrost process, therefore, realize the same energy of the device of the defrosting method of above-mentioned air-conditioning
The frosting state and then control air-conditioning of enough accurate judgement air-conditionings enter defrost process.
Claims (10)
1. the defrosting method of air-conditioning, which comprises the following steps:
Step 1. establishes the corresponding each detection temperature of multiple test points on outdoor heat exchanger refrigerant pipe and outdoor heat exchanger refrigerant
Functional relation between the second temperature of inlet and the third temperature at refrigerant exit；
Step 2. obtains the first temperature of outdoor heat exchanger air inlet and first wet when running under air-conditioning is in heating mode
Second temperature at degree and outdoor heat exchanger refrigerant inlet and the third temperature at outdoor unit heat exchanger refrigerant exit；
Step 3. calculates more on outdoor heat exchanger refrigerant pipe according to the second temperature, third temperature and the functional relation
The corresponding each test point temperature of a test point；
Step 4. is wet according to the corresponding each detection temperature of test points multiple on outdoor heat exchanger refrigerant pipe, the first temperature and first
Degree judges the frosting state of air-conditioning, controls air-conditioning according to the frosting state and enters defrost process.
2. the defrosting method of air-conditioning as described in claim 1, which is characterized in that described to establish on outdoor heat exchanger refrigerant pipe
Second temperature at the corresponding each detection temperature of multiple test points and outdoor heat exchanger refrigerant inlet and the third at refrigerant exit
Functional relation between temperature includes:
In experimental stage, air-conditioning is under heating mode when running, and obtains multiple test points pair on outdoor heat exchanger refrigerant pipe
Second temperature at each detection temperature for answering, outdoor heat exchanger refrigerant inlet and the third temperature at refrigerant exit；
The corresponding each detection temperature of each test point and room are established respectively according to each detection temperature, second temperature and third temperature
The functional relation between the third temperature at second temperature and refrigerant exit at external heat exchanger refrigerant inlet, and by the function
Relationship is stored to the control system of air-conditioning.
3. the defrosting method of air-conditioning as claimed in claim 2, which is characterized in that on the acquisition outdoor heat exchanger refrigerant pipe
Second temperature at the corresponding each detection temperature of multiple test points, outdoor heat exchanger refrigerant inlet and the third temperature at refrigerant exit
Degree includes:
Multiple test points are correspondingly arranged multiple temperature sensors on the refrigerant pipe of the outdoor heat exchanger, outdoor heat exchanger
Second temperature sensor is set at refrigerant inlet, third temperature sensor is set at the refrigerant exit of outdoor heat exchanger；
Obtain each detection temperature, the second temperature of second temperature sensor of the corresponding multiple temperature sensors of multiple test points with
And the third temperature of third temperature sensor.
4. the defrosting method of air-conditioning as described in claim 1, which is characterized in that described to obtain the of outdoor heat exchanger air inlet
At second temperature and outdoor heat exchanger refrigerant exit at one temperature and the first humidity and outdoor heat exchanger refrigerant inlet
Three temperature include:
In the air inlet of the outdoor heat exchanger, the first temperature sensor and the first humidity sensor be set, outdoor heat exchanger it is cold
Second temperature sensor is arranged in matchmaker inlet, and third temperature sensor is arranged at the refrigerant exit of outdoor heat exchanger；
Obtain the first temperature of the first temperature sensor, the first humidity of the first humidity sensor, second temperature sensor
The third temperature of two temperature and third temperature sensor.
5. the defrosting method of air-conditioning as described in claim 1, which is characterized in that described according on outdoor heat exchanger refrigerant pipe
The corresponding each detection temperature of multiple test points, the first temperature and the first humidity judge that the frosting state of air-conditioning includes:
According to first temperature, the dew-point temperature under first humidity is obtained；
The detection temperature of each test point and first temperature difference of the dew-point temperature and the first temperature and the dew are obtained respectively
Second temperature difference of point temperature；
The frosting state of each test point is judged according to first temperature difference and second temperature difference.
6. the defrosting method of air-conditioning as claimed in claim 5, which is characterized in that described to be sentenced according to first temperature difference and second temperature difference
The frosting state of each test point of breaking includes:
If first temperature difference is in the first preset range, and second temperature difference is in the second preset range, then judges the inspection
Measuring point is in frosting state；
If the quantity of the test point in frosting state is greater than the first preset value, judge that air-conditioning is in frosting state.
7. the defrosting method of air-conditioning as claimed in claim 5, which is characterized in that described to be sentenced according to first temperature difference and second temperature difference
Break the frosting state of each test point further include:
If first temperature difference is in the first preset range, and second temperature difference is in third preset range, then judges the inspection
Measuring point is in condensation state；
If the quantity of the test point in condensation state is greater than the second preset value, judge that air-conditioning is in condensation state.
8. the defrosting method of air-conditioning as described in any one of claim 1 to 7, which is characterized in that the frosting according to air-conditioning
State control air-conditioning enters defrost process further include:
If the air-conditioning is in frosting state, controls the air-conditioning and enter defrost process；
If the air-conditioning is in condensation state, controls the air-conditioning and enter inhibition frosting process.
9. the defrosting method of air-conditioning as claimed in claim 8, which is characterized in that the inhibition frosting process includes: to improve room
Outer machine rotation speed of fan reduces compressor frequency and/or reduces refrigerant circulation flow.
10. the defrosting device of air-conditioning characterized by comprising
Unit is established, for establishing the corresponding each detection temperature of multiple test points on outdoor heat exchanger refrigerant pipe and outdoor heat exchange
The functional relation between the third temperature at second temperature and refrigerant exit at device refrigerant inlet；
Acquiring unit, for when being run under air-conditioning is in heating mode, obtain outdoor heat exchanger air inlet the first temperature and
The third temperature at second temperature and outdoor unit heat exchanger refrigerant exit at first humidity and outdoor heat exchanger refrigerant inlet
Degree；
Computing unit, for calculating outdoor heat exchanger refrigerant according to the second temperature, third temperature and the functional relation
The corresponding each detection temperature of multiple test points on pipeline；
Control unit, for according to the corresponding each detection temperature of test points multiple on outdoor heat exchanger refrigerant pipe, the first temperature
The frosting state that air-conditioning is judged with the first humidity controls air-conditioning according to the frosting state and enters defrost process.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631319A (en) * | 2019-10-24 | 2019-12-31 | 江苏精英冷暖设备工程有限公司 | Synthesize intelligent freezer defrosting device |
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