CN104676991B - Air conditioner and defrosting method thereof - Google Patents
Air conditioner and defrosting method thereof Download PDFInfo
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- CN104676991B CN104676991B CN201310611272.0A CN201310611272A CN104676991B CN 104676991 B CN104676991 B CN 104676991B CN 201310611272 A CN201310611272 A CN 201310611272A CN 104676991 B CN104676991 B CN 104676991B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000010257 thawing Methods 0.000 title abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner and a defrosting method thereof. The defrosting method of the air conditioner comprises the following steps: 1) the air conditioner is operated in a heating mode, and the pipe temperature T of an outdoor heat exchanger of the air conditioner is detectedB(ii) a 2) When the running time of the air conditioner reaches a first preset time TB≤TATime, controlStarting defrosting for the 1 st time and recording defrosting time t1Wherein, TAThe defrosting pipe temperature is set; 3) recording the nth defrosting time as tnAfter the nth defrosting is finished, the running time of the air conditioner reaches a first preset time TB≤TCIn time, the air conditioner is controlled to start defrosting for the (n + 1) th time, and defrosting time t is recordedn+1Wherein, TCIn order to revise the tube temperature, n is more than or equal to 1. In the defrosting method of the air conditioner, the defrosting pipe temperature T is adjusted before defrosting every timeAThe temperature T of the defrosting pipe is revisedAThe dynamic revision of the air conditioner can accurately know the frosting condition, improve the defrosting effect and reduce the influence on the heating effect of the air conditioner.
Description
Technical field
The present invention relates to air-conditioner defrosting technical field, more particularly, it relates to a kind of air-conditioner and its Defrost method.
Background technology
When air-conditioner is run with heating mode, outdoor heat exchanger occurs frost.After outdoor heat exchanger frosting, lead to
Often need to remove the frost on outdoor heat exchanger, realized by the way of defrost at present.
At present, the Defrost method of air-conditioner is：Timing defrost is completing the defrost of air-conditioner.Specifically, when air-conditioner
Run time reach Preset Time and outdoor heat exchanger Guan Wen reach preset temperature after, air-conditioner starts defrost；Treat that defrost is complete
Cheng Hou, air conditioning unit normal operation, when meeting above-mentioned condition again, (run time of air-conditioner reaches Preset Time and outdoor is changed
The Guan Wen of hot device reaches preset temperature) when, start defrost.
But, there is problems with above-mentioned Defrost method：If outdoor air relative humidity is less, when the operation of air-conditioner
Between reach Preset Time and outdoor heat exchanger Guan Wen reach preset temperature after, outdoor heat exchanger frosting seldom or is not substantially tied
Frost, but now air-conditioner still can carry out defrost process；If outside air humidity is larger, when the run time of air-conditioner reaches
After the Guan Wen of Preset Time and outdoor heat exchanger reaches preset temperature, outdoor heat exchanger frosting is thicker, now carries out defrost, is easier to
The sordid phenomenon of defrost occurs.Then there is " frequent defrost " or " defrost is incomplete " in above-mentioned Defrost method, leads to
Defrosting effect is poor, has had a strong impact on the heating effect of air-conditioner.
In sum, how to defrost, to improve defrosting effect, reduce the impact to air conditioner heat-production effect, be current basis
Skilled person's problem demanding prompt solution.
Content of the invention
It is an object of the invention to provide a kind of Defrost method of air-conditioner, to improve defrosting effect, and then reduce to air-conditioning
The impact of device heating effect.It is a further object of the present invention to provide a kind of air-conditioner.
To achieve these goals, the present invention provides following technical scheme：
A kind of Defrost method of air-conditioner, including step：
1) air-conditioner is run with heating mode, detects pipe temperature T of the outdoor heat exchanger of described air-conditionerB；
2) when the run time of described air-conditioner reaches the first Preset Time and TB≤TAWhen, control air-conditioner to start the 1st time
Defrost, and record defrost time t1, wherein, TAFor defrost Guan Wen；
3) the note n-th defrost time is tn, from n-th defrost terminate after the run time of described air-conditioner to reach first pre-
If time and TB≤TCWhen, control air-conditioner to start (n+1)th defrost, and record defrost time tn+1, wherein, TCFor revision pipe
Temperature, n >=1, work as tb≤tn- t0≤taWhen, TC=TA, work as tn- t0＜ tbWhen, then TC=TA- △ T, works as tn- t0＞ taWhen, TC=
TA+ △ T, taFor the second Preset Time, tbFor the 3rd Preset Time, t0For defrost Best Times, △ T is revision value, and △ T ＞
0.
Preferably, in the Defrost method of above-mentioned air-conditioner, ta＞ 0, tb＜ 0, and ta=| tb|.
Preferably, in the Defrost method of above-mentioned air-conditioner, ta=| tb|=1.
Preferably, in the Defrost method of above-mentioned air-conditioner, described step 2) also include step before：Detection outdoor environment temperature
Degree, determines defrost pipe temperature T according to outdoor environment temperatureA.
Preferably, pipe temperature T of described outdoor heat exchanger in the Defrost method of above-mentioned air-conditioner, is detected using pipe temperature-sensitive bagB,
Outdoor environment temperature is detected using environment temperature-sensitive bag.
The principle of the Defrost method of air-conditioner that the present invention provides is：Work as tb≤tn- t0≤taWhen, show n-th defrost
Time and defrost Best Times difference are less, and the n-th defrost time is appropriate, then defrost pipe temperature TANeed not revise, i.e. revision pipe
Warm TCFor defrost pipe temperature TA；Work as tn- t0＜ tbWhen, that is, the n-th defrost time be smaller than defrost Best Times, show that n-th is tied
Frost less, then need during (n+1)th defrost reduce pipe temperature TB, to increase the frost tied before (n+1)th defrost, that is, revise Guan Wen
TC=TA- △ T；Work as tn- t0＞ taWhen, that is, n-th defrost time relatively larger than defrost Best Times, show the frost that n-th is tied
More, then need liter senior executive's temperature T during (n+1)th defrostB, to reduce the frost tied before (n+1)th defrost, that is, revise pipe temperature TC=
TA+△T.
The Defrost method of the air-conditioner that the present invention provides, according to the last defrost time, to defrost pipe temperature TARepaiied
Order and obtain revision pipe temperature TC, and according to this revision pipe temperature TCCarry out the defrost of this time.So, each time before defrost all to defrost
Pipe temperature TARevised, that is, achieved to defrost pipe temperature TADynamic revision, can accurately know frosting situation so that
The time of defrost each time of air-conditioner all controls within the appropriate time, it is to avoid " frequent defrost " and " defrost is not complete
Problem entirely ", effectively increases defrosting effect, and then reduces the impact to air conditioner heat-production effect.
The Defrost method of the air-conditioner based on above-mentioned offer, present invention also offers a kind of air-conditioner, this air-conditioner includes：
Outdoor heat exchanger, the throttling arrangement being connected with described outdoor heat exchanger；
It is arranged in described outdoor heat exchanger, detect described outdoor heat exchanger pipe temperature TBThe first temperature sensor；
It is connected with described first temperature sensor, when the run time of described air-conditioner reaches the first Preset Time and TB≤
TAWhen, control described air-conditioner to run with defrost pattern for the 1st time, and record defrost time t1The first controller, wherein, TAFor
Defrost Guan Wen；
It is connected with described first temperature sensor and described first controller, the n-th defrost time is tn, from n-th
The run time that frost terminates rear described air-conditioner reaches the first Preset Time and TB≤TCWhen, control described air-conditioner (n+1)th time with
Defrost pattern is run, and records defrost time tn+1Second controller, wherein, TCFor revising Guan Wen, n >=1, work as tb≤tn- t0
≤taWhen, TC=TA, work as tn- t0＜ tbWhen, then TC=TA- △ T, works as tn- t0＞ taWhen, TC=TA+ △ T, taDefault for second
Time, tbFor the 3rd Preset Time, t0For defrost Best Times, △ T is revision value, and △ T ＞ 0.
Preferably, in above-mentioned air-conditioner, ta＞ 0, tb＜ 0, and ta=| tb|.
Preferably, in above-mentioned air-conditioner, ta=| tb|=1.
Preferably, above-mentioned air-conditioner, also includes：The second temperature sensor of detection outdoor environment temperature；
It is connected with described second temperature sensor, defrost pipe temperature T is determined according to outdoor environment temperatureAProcessing unit, institute
State processing unit to be connected with described first controller and described second controller respectively.
Preferably, in above-mentioned air-conditioner, described first controller, described second controller and described processing unit are integrated in
The control mainboard of described air-conditioner.
Preferably, in above-mentioned air-conditioner, described first temperature sensor is pipe temperature-sensitive bag；Described second temperature sensor is
Environment temperature-sensitive bag, described environment temperature-sensitive bag is arranged on the shell body of described air-conditioner.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the Defrost method of air-conditioner provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of air-conditioner provided in an embodiment of the present invention.
In figure 2 above：
1 is environment temperature-sensitive bag, 2 is pipe temperature-sensitive bag, 3 is outdoor heat exchanger, 4 is throttling arrangement, 5 is control mainboard, 6 is room
Interior heat exchanger, 7 be compressor, 8 be cross valve.
Specific embodiment
Embodiments provide a kind of Defrost method of air-conditioner, improve defrosting effect, and then reduce to sky
Adjust the impact of device heating effect.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Refer to accompanying drawing 1, the Defrost method of air-conditioner provided in an embodiment of the present invention specifically includes step：
S01) pipe temperature T of the outdoor heat exchanger of detection air-conditionerB：
It should be noted that the phenomenon of frosting when air-conditioner is only run, just occurs with heating mode.Therefore sensing chamber
Pipe temperature T of external heat exchangerBDetected when air-conditioner is run with heating mode.Generally examined by temperature sensor
Survey, for the ease of the installation of temperature sensor, preferentially adopt pipe temperature-sensitive bag to detect pipe temperature T of outdoor heat exchangerB.
S02) when the run time of air-conditioner reaches the first Preset Time and TB≤TAWhen, control air-conditioner to start the 1st change
Frost simultaneously records defrost time t1, wherein, TAFor defrost Guan Wen：
Defrost pipe temperature TA, it is the Guan Wen of outdoor heat exchanger when air-conditioner needs to defrost on a preset condition based.Defrost pipe temperature TACan
To be determined by outdoor environment temperature.Preferably, also include before step S02 in the Defrost method of above-mentioned air-conditioner walking
Suddenly：Detection outdoor environment temperature, determines defrost pipe temperature T according to outdoor environment temperatureA.Generally examined by temperature sensor
Survey, for the ease of the installation of temperature sensor, preferentially adopt environment temperature-sensitive bag to detect outdoor environment temperature.
In actual application, need to carry out multigroup test.Using outdoor environment temperature as parameter, change outdoor environment
Temperature, the Guan Wen of outdoor heat exchanger, i.e. defrost pipe temperature T when record air-conditioner needs to defrostA；Final acquisition difference outdoor environment temperature
Spend corresponding defrost pipe temperature TA, by the control mainboard of these data input air-conditioners, thus being determined according to outdoor environment temperature
Defrost pipe temperature TA.Certainly comprehensively determine also dependent on outdoor environment temperature and outdoor environment humidity and run time, or will
Defrost pipe temperature TAIt is set to definite value, the embodiment of the present invention is not done specifically defined to this.
It should be noted that the run time of air-conditioner refers to, air-conditioner starts to run during defrost to the 1st time Zi after start
Time.Defrost time t1, refer to the 1st time used by defrost of air-conditioner.
S03) run time terminating rear air-conditioner from n-th defrost reaches the first Preset Time and TB≤TCWhen, control empty
Device is adjusted to start (n+1)th defrost and record defrost time tn+1, wherein, TCFor revising Guan Wen, n >=1：
It should be noted that the note n-th defrost time is tn, n=1,2,3,4,5,6 ....In order to effectively revise defrost
Pipe temperature TA, set the defrost Best Times t of air-conditioner0, by comparing the n-th defrost time with defrost Best Times come revision
White pipe temperature TA.Specifically, work as tb≤tn- t0≤taWhen, TC=TA；Work as tn- t0＜ tbWhen, then TC=TA- △ T；Work as tn- t0＞
taWhen, TC=TA+△T；Wherein, taFor the second Preset Time, tbFor the 3rd Preset Time, △ T is revision value, and △ T ＞ 0.
Specifically, the run time terminating rear air-conditioner from the 1st defrost reaches the first Preset Time and TB≤TCWhen, control
Air-conditioner processed starts the 2nd defrost and records defrost time t2, work as tb≤t1- t0≤taWhen, TC=TA, work as t1- t0＜ tbWhen,
Then TC=TA- △ T, works as t1- t0＞ taWhen, TC=TA+△T；
The run time terminating rear air-conditioner from the 2nd defrost reaches the first Preset Time and TB≤TCWhen, control air-conditioner
Start the 3rd defrost and record defrost time t3, work as tb≤t2- t0≤taWhen, TC=TA, work as t2- t0＜ tbWhen, then TC=TA-
△ T, works as t2- t0＞ taWhen, TC=TA+△T；
The run time terminating rear air-conditioner from the 3rd defrost reaches the first Preset Time and TB≤TCWhen, control air-conditioner
Start the 4th defrost and record defrost time t4, work as tb≤t3- t0≤taWhen, TC=TA, work as t3- t0＜ tbWhen, then TC=TA-
△ T, works as t3- t0＞ taWhen, TC=TA+△T；
The like, the run time terminating rear air-conditioner from n-th defrost reaches the first Preset Time and TB≤TCWhen,
Air-conditioner is controlled to start (n+1)th defrost and record defrost time tn+1, work as tb≤tn- t0≤taWhen, TC=TA, work as tn- t0＜
tbWhen, then TC=TA- △ T, works as tn- t0＞ taWhen, TC=TA+△T.
In the Defrost method of above-mentioned air-conditioner, defrost Best Times t0Value and revision value △ T value all unique,
The applied environment of air-conditioner is different, and value is different, defrost Best Times t0It is required to obtain by test with revision value △ T.Tool
Body, set defrost pipe temperature TAThe first Preset Time running with air-conditioner, when observing defrosting situation, and then determining that defrost is optimal
Between t0；Determine defrost Best Times t0Afterwards, set defrost pipe temperature TAWith air-conditioner run time, according to defrost Best Times t0Enter
Row defrost, observes defrosting situation, adjustment air-conditioner starts the Guan Wen of outdoor heat exchanger during defrost, and then determines revision value △ T.When
So, also defrost Best Times t can be obtained by other test methods0With revision value △ T, the embodiment of the present invention do not do to this specifically
Ground limits.tbAnd taIt is also required to obtain by test, the embodiment of the present invention does not limit to the occurrence of the two.
The principle of the Defrost method of air-conditioner provided in an embodiment of the present invention is：Work as tb≤tn- t0≤taWhen, show n-th
Secondary defrost time and defrost Best Times difference are less, and the n-th defrost time is appropriate, then defrost pipe temperature TANeed not revise, that is,
Revision pipe temperature TCFor defrost pipe temperature TA；Work as tn- t0＜ tbWhen, that is, the n-th defrost time be smaller than defrost Best Times, show n-th
Secondary tied frost is less, then need during (n+1)th defrost to reduce pipe temperature TB, to increase the frost tied before (n+1)th defrost, that is, repair
Order pipe temperature TC=TA- △ T；Work as tn- t0＞ taWhen, that is, n-th defrost time relatively larger than defrost Best Times, show n-th institute
The frost of knot is more, then need liter senior executive's temperature T during (n+1)th defrostB, to reduce the frost tied before (n+1)th defrost, i.e. revision pipe
Warm TC=TA+△T.
The Defrost method of air-conditioner provided in an embodiment of the present invention, according to the last defrost time, to defrost pipe temperature TA
Revised and obtained revision pipe temperature TC, and according to this revision pipe temperature TCCarry out the defrost of this time.So, each time before defrost all
To defrost pipe temperature TARevised, that is, achieved to defrost pipe temperature TADynamic revision, can accurately know frosting feelings
Condition so that the time of defrost each time of air-conditioner all control within the appropriate time, it is to avoid " frequent defrost " and " change occur
Frost is not exclusively " problem, effectively increase defrosting effect, and then reduce the impact to air conditioner heat-production effect.
Preferably, in the Defrost method of air-conditioner that above-described embodiment provides, ta＞ 0, tb＜ 0, and ta=| tb|.So,
Defrost pipe temperature T can more accurately be revisedA.Certainly, 0 ＜ t also may be selectedb＜ ta, the embodiment of the present invention do not do to this and specifically limits
Fixed.Obtain through overtesting, work as ta=| tb| when=1, the defrosting effect of air-conditioner is preferable, therefore prioritizing selection ta=| tb|=1.
The Defrost method of the air-conditioner being provided based on above-described embodiment, the embodiment of the present invention additionally provides a kind of air-conditioner,
Refer to accompanying drawing 2, in Fig. 2：Band arrow a little in end represents the flow direction of coolant during air conditioner heat-production, and end is without the arrow of point
The flow direction of coolant when representing air-conditioner refrigeration.
Air-conditioner provided in an embodiment of the present invention includes：Outdoor heat exchanger 3, the throttling arrangement being connected with outdoor heat exchanger 3
4；It is arranged in outdoor heat exchanger 3, detect outdoor heat exchanger 3 pipe temperature TBThe first temperature sensor；With the first temperature sensor
It is connected, when the run time of air-conditioner reaches the first Preset Time and TB≤TAWhen, control air-conditioner to transport with defrost pattern for the 1st time
OK, and record defrost time t1The first controller, wherein, TAFor defrost Guan Wen；With the first temperature sensor and the first controller
It is connected, the n-th defrost time is tn, the run time terminating rear air-conditioner from n-th defrost reaches the first Preset Time and TB≤
TCWhen, control air-conditioner to run with defrost pattern for (n+1)th time, and record defrost time tn+1Second controller, wherein, TCFor repairing
Order Guan Wen, n >=1, work as tb≤tn- t0≤taWhen, TC=TA, work as tn- t0＜ tbWhen, then TC=TA- △ T, works as tn- t0＞ taWhen,
TC=TA+ △ T, taFor the second Preset Time, tbFor the 3rd Preset Time, t0For defrost Best Times, △ T is revision value, and △ T
＞ 0.
It should be noted that the phenomenon of frosting when air-conditioner is only run, just occurs with heating mode.Therefore sensing chamber
Pipe temperature T of external heat exchanger 3BDetected when air-conditioner is run with heating mode.Defrost pipe temperature TA, it is pre-conditioned
The Guan Wen of outdoor heat exchanger 3 when lower air-conditioner needs to defrost.The run time of air-conditioner refers to, the run time of air-conditioner, that is,
Air-conditioner is Zi the time run when after start to the 1st beginning defrost.Defrost time t1, refer to used by the 1st defrost of air-conditioner
Time, i.e. the 1st time used by defrost of air-conditioner.Defrost Best Times t0, revision value △ T, tbAnd taIt is required to by examination
Test acquisition.
The defrosting process of air-conditioner that above-described embodiment provides is：
First temperature sensor detects pipe temperature T of outdoor heat exchanger 3B；
When the run time of air-conditioner reaches the first Preset Time and TB≤TAWhen, the first controller control air-conditioner the 1st time
Run with defrost pattern, and record defrost time t1The first controller；
The run time terminating rear air-conditioner from the 1st defrost reaches the first Preset Time and TB≤TCWhen, second controller
Air-conditioner is controlled to start the 2nd defrost and record defrost time t2, work as tb≤t1- t0≤taWhen, TC=TA, work as t1- t0＜ tb
When, then TC=TA- △ T, works as t1- t0＞ taWhen, TC=TA+△T；
The run time terminating rear air-conditioner from the 2nd defrost reaches the first Preset Time and TB≤TCWhen, second controller
Air-conditioner is controlled to start the 3rd defrost and record defrost time t3, work as tb≤t2- t0≤taWhen, TC=TA, work as t2- t0＜ tb
When, then TC=TA- △ T, works as t2- t0＞ taWhen, TC=TA+△T；
The run time terminating rear air-conditioner from the 3rd defrost reaches the first Preset Time and TB≤TCWhen, second controller
Air-conditioner is controlled to start the 4th defrost and record defrost time t4, work as tb≤t3- t0≤taWhen, TC=TA, work as t3- t0＜ tb
When, then TC=TA- △ T, works as t3- t0＞ taWhen, TC=TA+△T；
The like, the run time terminating rear air-conditioner from n-th defrost reaches the first Preset Time and TB≤TCWhen,
Second controller controls air-conditioner to start (n+1)th defrost and record defrost time tn+1, work as tb≤tn- t0≤taWhen, TC=TA,
Work as tn- t0＜ tbWhen, then TC=TA- △ T, works as tn- t0＞ taWhen, TC=TA+△T.
The defrosting principle of air-conditioner provided in an embodiment of the present invention is：Work as tb≤tn- t0≤taWhen, show n-th defrost
Time and defrost Best Times difference are less, and the n-th defrost time is appropriate, then defrost pipe temperature TANeed not revise, i.e. revision pipe
Warm TCFor defrost pipe temperature TA；Work as tn- t0＜ tbWhen, that is, the n-th defrost time be smaller than defrost Best Times, show that n-th is tied
Frost less, then need during (n+1)th defrost reduce pipe temperature TB, to increase the frost tied before (n+1)th defrost, that is, revise Guan Wen
TC=TA- △ T；Work as tn- t0＞ taWhen, that is, n-th defrost time relatively larger than defrost Best Times, show the frost that n-th is tied
More, then need liter senior executive's temperature T during (n+1)th defrostB, to reduce the frost tied before (n+1)th defrost, that is, revise pipe temperature TC=
TA+△T.
Air-conditioner provided in an embodiment of the present invention, by the first temperature sensor, the first controller and second controller, real
Show according to the last defrost time, to defrost pipe temperature TARevised and obtained revision pipe temperature TC, and according to this revision Guan Wen
TCCarry out the defrost of this time.So, each time before defrost all to defrost pipe temperature TARevised, that is, achieved to defrost Guan Wen
TADynamic revision, can accurately know frosting situation so that the time of defrost each time of air-conditioner all controls relatively is closing
In the suitable time, it is to avoid the problem of " frequent defrost " and " defrost is incomplete " occurs, effectively increases defrosting effect, and then fall
The low impact to air conditioner heat-production effect.
Preferably, in the air-conditioner that above-described embodiment provides, ta＞ 0, tb＜ 0, and ta=| tb|.In such manner, it is possible to it is more accurate
Ground revision defrost pipe temperature TA.Certainly, 0 ＜ t also may be selectedb＜ ta, the embodiment of the present invention is not done specifically defined to this.Through examination
Test acquisition, work as ta=| tb| when=1, the defrosting effect of air-conditioner is preferable, therefore prioritizing selection ta=| tb|=1.
In the air-conditioner that above-described embodiment provides, defrost pipe temperature TACan be determined by outdoor environment temperature.Preferably
, above-mentioned air-conditioner also includes：The second temperature sensor of detection outdoor environment temperature；It is connected with second temperature sensor, root
Determine defrost pipe temperature T according to outdoor environment temperatureAProcessing unit, this processing unit respectively with the first controller and described second control
Device processed is connected.In actual application, need to carry out multigroup test.Using outdoor environment temperature as parameter, change outdoor ring
Border temperature, the Guan Wen of outdoor heat exchanger 3, i.e. defrost pipe temperature T when record air-conditioner needs to defrostA；Final acquisition different chamber outer shroud
Border temperature corresponding defrost pipe temperature TA, by the processing unit of these data input air-conditioners, thus according to outdoor environment temperature
Determine defrost pipe temperature TA.Certainly comprehensively determine also dependent on outdoor environment temperature and outdoor environment humidity and run time, or
Person is by defrost pipe temperature TAIt is set to definite value, the embodiment of the present invention is not done specifically defined to this.
For the ease of installing, in the air-conditioner that above-described embodiment provides, the first controller, second controller and processing unit
It is integrated in the control mainboard 5 of air-conditioner.
Preferably, in the air-conditioner that above-described embodiment provides, the first temperature sensor is pipe temperature-sensitive bag 2；Second temperature passes
Sensor is environment temperature-sensitive bag 1, and this environment temperature-sensitive bag 1 is arranged on the shell body of air-conditioner.Wherein, pipe temperature-sensitive bag 2 is arranged at room
On the heat exchanger tube of external heat exchanger 3.So, it is easy to the installation of the first temperature sensor and second temperature sensor, certainly, also optional
Select other kinds of temperature sensor, the embodiment of the present invention is not done specifically defined to this.
In the air-conditioner that above-described embodiment provides, indoor heat exchanger 6 is connected with throttling arrangement 4, and compressor 7 passes through cross valve
8 are connected with indoor heat exchanger 6 and outdoor heat exchanger 3.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The scope the widest causing.
Claims (11)
1. a kind of Defrost method of air-conditioner is it is characterised in that include step：
1) air-conditioner is run with heating mode, detects pipe temperature T of the outdoor heat exchanger of described air-conditionerB；
2) when the run time of described air-conditioner reaches the first Preset Time and TB≤TAWhen, control air-conditioner to start the 1st change
Frost, and record defrost time t1, wherein, TAFor defrost Guan Wen；
3) the note n-th defrost time is tn, from n-th defrost terminate after described air-conditioner run time reach first default when
Between and TB≤TCWhen, control air-conditioner to start (n+1)th defrost, and record defrost time tn+1, wherein, TCFor revise Guan Wen, n >=
1, work as tb≤tn- t0≤taWhen, TC=TA, work as tn- t0＜ tbWhen, then TC=TA- △ T, works as tn- t0＞ taWhen, TC=TA+△
T, taFor the second Preset Time, tbFor the 3rd Preset Time, t0For defrost Best Times, △ T is revision value, and △ T ＞ 0.
2. the Defrost method of air-conditioner as claimed in claim 1 is it is characterised in that ta＞ 0, tb＜ 0, and ta=| tb|.
3. the Defrost method of air-conditioner as claimed in claim 2 is it is characterised in that ta=| tb|=1.
4. the Defrost method of air-conditioner as claimed in claim 1 is it is characterised in that described step 2) before also include step：
Detection outdoor environment temperature, determines defrost pipe temperature T according to outdoor environment temperatureA.
5. using pipe temperature-sensitive bag, the Defrost method of air-conditioner as claimed in claim 4 is it is characterised in that detect that described outdoor is changed
Pipe temperature T of hot deviceB, outdoor environment temperature is detected using environment temperature-sensitive bag.
6. a kind of air-conditioner, including：Outdoor heat exchanger, the throttling arrangement being connected with described outdoor heat exchanger；It is characterized in that, also
Including：
It is arranged in described outdoor heat exchanger, detect described outdoor heat exchanger pipe temperature TBThe first temperature sensor；
It is connected with described first temperature sensor, when the run time of described air-conditioner reaches the first Preset Time and TB≤TAWhen,
Control described air-conditioner to run with defrost pattern for the 1st time, and record defrost time t1The first controller, wherein, TAFor defrost pipe
Temperature；
It is connected with described first temperature sensor and described first controller, the n-th defrost time is tn, terminate from n-th defrost
The run time of described air-conditioner reaches the first Preset Time and T afterwardsB≤TCWhen, control described air-conditioner (n+1)th time with defrost mould
Formula is run, and records defrost time tn+1Second controller, wherein, TCFor revising Guan Wen, n >=1, work as tb≤tn- t0≤taWhen,
TC=TA, work as tn- t0＜ tbWhen, then TC=TA- △ T, works as tn- t0＞ taWhen, TC=TA+ △ T, taFor the second Preset Time, tb
For the 3rd Preset Time, t0For defrost Best Times, △ T is revision value, and △ T ＞ 0.
7. air-conditioner as claimed in claim 6 is it is characterised in that ta＞ 0, tb＜ 0, and ta=| tb|.
8. air-conditioner as claimed in claim 7 is it is characterised in that ta=| tb|=1.
9. air-conditioner as claimed in claim 6 is it is characterised in that also include：The second temperature of detection outdoor environment temperature passes
Sensor；
It is connected with described second temperature sensor, defrost pipe temperature T is determined according to outdoor environment temperatureAProcessing unit, described process
Unit is connected with described first controller and described second controller respectively.
10. air-conditioner as claimed in claim 9 is it is characterised in that described first controller, described second controller and described
Processing unit is integrated in the control mainboard of described air-conditioner.
11. air-conditioners as claimed in claim 9 are it is characterised in that described first temperature sensor is pipe temperature-sensitive bag；Described
Two temperature sensors are environment temperature-sensitive bag, and described environment temperature-sensitive bag is arranged on the shell body of described air-conditioner.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105042786B (en) * | 2015-07-30 | 2018-09-11 | 广东美的制冷设备有限公司 | The control method and device of dehumidifier and dehumidifier |
| CN105650813B (en) * | 2016-01-11 | 2018-10-02 | 广东美的制冷设备有限公司 | The defrosting control method and device of air-conditioning |
| CN107917504B (en) * | 2017-10-11 | 2019-10-01 | 青岛海尔空调器有限总公司 | Air-conditioning and its defrosting control method |
| CN107655150A (en) * | 2017-10-16 | 2018-02-02 | 广东美的暖通设备有限公司 | Air-conditioner defrosting control device and method |
| CN111623470B (en) * | 2020-04-23 | 2021-07-27 | 海信（山东）空调有限公司 | Defrosting control method and system of air conditioner, storage medium and air conditioner |
| CN113339940A (en) * | 2021-05-31 | 2021-09-03 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device, storage medium and air conditioner |
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