CN106524388A - Defrosting control method for heat pump unit and air conditioner heat pump unit adopting defrosting control method - Google Patents
Defrosting control method for heat pump unit and air conditioner heat pump unit adopting defrosting control method Download PDFInfo
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- CN106524388A CN106524388A CN201510581559.2A CN201510581559A CN106524388A CN 106524388 A CN106524388 A CN 106524388A CN 201510581559 A CN201510581559 A CN 201510581559A CN 106524388 A CN106524388 A CN 106524388A
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- 238000010257 thawing Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000013459 approach Methods 0.000 claims description 9
- 238000007667 floating Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 5
- 230000008719 thickening Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to a defrosting control method for a heat pump unit and the air conditioner heat pump unit adopting the defrosting control method. The situations such as inaccurate judgment of the frosting condition, conduction of defrosting operation under the frostless condition and incomplete defrosting are avoided, the comfort level of an air conditioner is improved, and energy is saved. The real-time temperature of an external coil pipe is monitored, the thickness of a frost layer is judged according to change conditions of the temperature of the external coil pipe and the duration, defrosting is performed when the frost layer has the certain thickness, and defrosting conditions can be adjusted in real time according to temperature and humidity change after running of the unit, so that the unit is adapted to different actual environments.
Description
Technical field
The invention belongs to air-conditioner defrosting technical field, more particularly to a kind of source pump defrosting control method and make
With the air conditioner and heat pump unit of the defrosting control method.
Background technology
When common heat pump air-conditioning heating runs, outdoor heat exchanger temperature will frosting less than the solidification point of water.
Frost layer increased thermal resistance and reduce total exchange coefficient of the heat exchanger, and the heat transfer effect of the thicker post-condenser of frost can become
Difference, weakens the heating effect of system, now just needs to carry out defrost process.
The method of air-conditioner defrosting is general following several at present：1st, timing defrost；2nd, according to ambient temperature and cold
Condenser temperature is judged and calculation process judges whether air-conditioning needs defrost and carry out defrost process to which；3、
Data by some heating conditions of laboratory simulation and when storage heats frosting, unit is in actual motion mistake
The data of collection and experimental data are relatively shown into that whether air-conditioning frosting carries out corresponding defrost process in journey.
Timing defrost energy consumption is larger, and then to there are data inaccurate for two methods, or Work condition analogue is imperfect
With physical presence difference, the data of storage are inconsistent with the environment of unit actual motion, it is impossible to according to reality
Situation carries out self-recision regulation, and frosting judges that the inaccurate situation for causing frostless defrost or having frost not change is sent out
Life reduces the comfortableness of air-conditioning while also result in energy waste.Therefore existing common Defrost mode can not
It is concrete to detect that whether air-conditioner frosting timely and effectively carries out defrosting operation defrosting effect and pay no attention to exactly
Think.
The content of the invention
It is an object of the invention to provide a kind of air-conditioner defrosting control method, it is to avoid frosting situation judges not
Accurately, frostless and carry out defrosting operation and the incomplete situation of defrosting, improve the comfortableness saving of air-conditioning
The energy.
Another object of the present invention is to provide the air conditioner and heat pump unit using above-mentioned defrosting control method.
In order to solve above-mentioned technical problem, the present invention is addressed by following technical proposals：
A kind of source pump defrosting control method, comprises the following steps：
1) start the outer coil pipe real time temperature T of monitoring after heating, 0 DEG C first carries out defrosting up to T at least as T ＜
Stop defrosting and being heated after not less than 0 DEG C, otherwise then directly heated；
2) the first preset duration S is drawn when operation is heated1Mean temperature Ts of outer coil pipe, as 0 DEG C and T of T ＜
Persistently exceed the second preset duration S with time of the difference of Ts more than default temperature approach △ T2, then carry out
Defrosting, on the contrary then continue to heat；
3) record the duration S for being defrosted4, according to the duration S for being defrosted4With the 3rd preset duration S3Than
Relatively result adjusts default temperature approach △ T or the second preset duration S2。
Further, the 3rd preset duration S3It is made up of standard preset duration A and floating difference B.
Further, the step 3) in the method for the default temperature approach △ T of adjustment be：When A-B≤
S4During≤A+B, △ T are constant；Work as S4During ＞ A+B, then △ T are turned down a unit value；Work as S4＜ A-B
When, then △ T are tuned up into a unit value.
Further, the step 3) in adjustment the second preset duration S2 method be：As A-B≤S4
During≤A+B, S2It is constant；Work as S4During ＞ A+B, then by S2Turn a unit value down；Work as S4During ＜ A-B,
Then by S2Tune up a unit value.
Preferably, the A and B can be set according to experimental data under national standard heating and defrosting operating mode.
Preferably, first preset duration S1Initial value can be according under national standard heating and defrosting operating mode
Experimental data sets.
Preferably, the initial value of the △ T can be set according to experimental data under national standard heating and defrosting operating mode.
Using the air conditioner and heat pump unit of above-mentioned source pump defrosting control method.
Beneficial effects of the present invention have it is following some：By monitoring outer coil pipe real time temperature, according to outer coil pipe temperature
The height of degree and persistent period situation of change, judge frost thickness, are just removed when frost layer reaches certain thickness
Frost, and can be according to the humiture change real-time adjustment defrosting condition after unit operation, so as to adapt to different realities
Border environment.
Description of the drawings
Fig. 1 is the logical flow chart of the present invention；
Fig. 2 is trial curve figure of the present invention.
Specific embodiment
The present invention is described in further detail with reference to embodiment：
As shown in figure 1, unit opens heating mode, that is, outer coil pipe real time temperature T is monitored, 0 DEG C is first as T ＜
Defrosting is carried out until stopping defrosting and being heated after T is at least not less than 0 DEG C, otherwise then directly heated；
Operation draws the first preset duration S when heating1Mean temperature Ts of outer coil pipe, as 0 DEG C and T and Ts of T ＜
Difference more than default temperature approach △ T time persistently exceed the second preset duration S2, then defrosted,
Otherwise then continue to heat；
The duration S defrosted by record4, according to the duration S for being defrosted4With the 3rd preset duration S3Relatively tie
Fruit adjusts default temperature approach △ T or the second preset duration S2。
3rd preset duration S3It is made up of standard preset duration A and floating difference B.
The method of adjustment of default temperature approach △ T is：As A-B≤S4During≤A+B, △ T are constant；When
S4During ＞ A+B, then △ T are turned down a unit value；Work as S4During ＜ A-B, then △ T are adjusted into one unit greater
Value.
Second preset duration S2Method of adjustment be：As A-B≤S4During≤A+B, S2It is constant；Work as S4＞ A+B
When, then by S2Turn a unit value down；Work as S4During ＜ A-B, then by S2Tune up a unit value.
Shown in Fig. 1 is the flow chart for adjusting △ T, adjusts S2Flow chart in the same manner.
As shown in Fig. 2 in heating process, unit capacity and coil temperature, running current etc. with
The increase of testing time, produces parabolical operation curve in similar figure, and under different humitures, curve
Curvature it is different, be embodied as in actual test process：In the case of unit frosting, with frost
The speed that layer is thickened is different, and unit capacity and coil temperature, compressor operating current attenuation speed are different.
It is similar in parabolical operation curve, in initial opening time section S of unit at this1Interior unit frost-free
Or thin frost is tied, the more steady parameter decay of curve ratio is smaller, and this period inner coil pipe temperature does meansigma methodss Ts。
As frost layer is thickening, heat exchanger heat transfer effect is deteriorated, and unit air quantity is increased due to windage, and air quantity reduces,
Coil pipe evaporating temperature is reduced, and the thickening speed of frost layer is sharply increased, and is further exacerbated by above-mentioned situation.
Frost layer thickness situation can be embodied as real-time coil temperature T and T for the temperature change of coil pipes
Can there is a temperature difference.In rational temperature range △ T, the other specification of unit and frost thickness are right
The heating capacity of unit, running status are not impacted affects very little in other words, and now unit does not have defrosting
Demand.
When frost layer it is further thickening, T and TsWhen the temperature difference is more than △ T, operating condition song curvature of a curve can be drastically
Become big, the speed of frosting is accelerated, and other operational factor rates of decay can also increase, draw in an experiment and work as T
With TsAccumulated time S of the temperature difference more than △ T2After time period, significantly affects because frost layer have accumulated adequate thickness
Heat pump effect has to enter into defrosting；Under identical humiture, the size of △ T, S2Time length can direct shadow
Ring the thickness degree of heat exchanger frosting；
During defrosting, different frost thickness, outdoor temperature humidity environment can be to the effects of unit defrosting
Rate is impacted, and the impact is embodied in unit defrosting and opens to meet defrosting to unit and complete condition and exits
The time span of defrosting is different；Under identical epidemic disaster environment, the thick defrosting duration of frost layer can compare frost layer
Thin duration will be grown, therefore can be using the duration S of defrosting4Length as judge frost thickness；
Appropriate criteria defrosting duration A (3-5 minutes) is selected in experimentation, and one is defined to A
Floating difference B of permission, constitutes default defrosting duration S3, i.e., when：
1st, actual defrosting duration S4In the range of default defrosting duration, A-B≤i.e. S4≤ A+B, then recognize
It is that the frost thickness of heat exchanger is rational when defrosting；
2nd, actual defrosting duration S4Less than default defrosting duration S3, i.e. S4＜ A-B, then it is assumed that when entering defrosting
Wait, the frost thickness of heat exchanger is partially thin；Condition △ T, the S2 entered under the ambient temperature and humidity before defrosting
Select one to be adjusted, make unit frost thickness when defrosting is entered be rational；To next heat pump
△ T are carried out adding one unit greater adjustment in cycle of operation or lengthen a unit adjustment to S2；
3rd, actual defrosting duration S4More than default defrosting duration S3, i.e. S4＜ A+B, then it is assumed that when entering defrosting
Wait, the frost thickness of heat exchanger is partially thick；Condition △ T, the S entered under the ambient temperature and humidity before defrosting2Choosing
Select one to be adjusted, make unit frost thickness when defrosting is entered be rational；Next heat pump is transported
△ T are carried out reducing a unit adjustment or to S in line period2Shorten a unit adjustment；
By unit in running, constantly to defrost condition △ T or S2Carry out self adjustment so that
Unit can enter defrosting under different temperature and humidity conditions all the time within a suitable time, and accomplish have
Frost just defrosts；Unit can more effectively adapt to various actual environments.
In a word, presently preferred embodiments of the present invention is the foregoing is only, it is all to be made according to scope of the present invention patent
Impartial change and modification, should all belong to the covering scope of patent of the present invention.
Claims (7)
1. a kind of source pump defrosting control method, it is characterised in that：Comprise the following steps：
1) start the outer coil pipe real time temperature T of monitoring after heating mode, work as T<0 DEG C first carries out defrosting until T
Stop defrosting and being heated after at least not less than 0 DEG C, otherwise then directly heated；
2) the first preset duration S is drawn when operation is heated1Mean temperature T of outer coil pipes, work as T<0 DEG C and T with
TsDifference more than default temperature approach Δ T time persistently exceed the second preset duration S2, then defrosted,
Otherwise then continue to heat；
3) record the duration S for being defrosted4, according to the duration S for being defrosted4With the 3rd preset duration S3Than
Relatively result adjusts default temperature approach Δ T or the second preset duration S2。
2. source pump defrosting control method according to claim 1, it is characterised in that：The step
3) in, the method for the default temperature approach Δ T of adjustment is：
As A-B≤S4During≤A+B, Δ T is constant；
Work as S4>During A+B, then Δ T is turned down a unit value；
Work as S4<During A-B, then Δ T is tuned up into a unit value；
Wherein A is the 3rd preset duration S3Standard preset duration, B be the 3rd preset duration S3Floating difference
Value.
3. source pump defrosting control method according to claim 1, it is characterised in that：The step
3) the second preset duration S of adjustment in2Method be：
As A-B≤S4During≤A+B, S2It is constant；
Work as S4>During A+B, then by S2Turn a unit value down；
Work as S4During ＜ A-B, then by S2Tune up a unit value；
Wherein A is the 3rd preset duration S3Standard preset duration, B be the 3rd preset duration S3Floating difference
Value.
4. the source pump defrosting control method according to Claims 2 or 3, it is characterised in that：Standard
Preset duration A and floating difference B can be set according to experimental data under national standard heating and defrosting operating mode.
5. the source pump defrosting control method according to claim 1-4 any claim, its feature
It is：First preset duration S1Initial value can be according to experimental data under national standard heating and defrosting operating mode
Setting.
6. the source pump defrosting control method according to claim 1-4 any claim, its feature
It is：The initial value of the Δ T can be set according to experimental data under national standard heating and defrosting operating mode.
7. using the air conditioner heat of the source pump defrosting control method described in claim 1-6 any claim
Pump assembly.
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| CN201510581559.2A CN106524388A (en) | 2015-09-11 | 2015-09-11 | Defrosting control method for heat pump unit and air conditioner heat pump unit adopting defrosting control method |
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| CN201510581559.2A CN106524388A (en) | 2015-09-11 | 2015-09-11 | Defrosting control method for heat pump unit and air conditioner heat pump unit adopting defrosting control method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575998A (en) * | 2017-09-08 | 2018-01-12 | 青岛海尔空调器有限总公司 | The defrosting control method of air-conditioning and its outdoor unit |
| 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 |
| CN110631186A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN111306658A (en) * | 2020-03-06 | 2020-06-19 | 宁波德业科技股份有限公司 | Defrosting method of dehumidifier |
| CN111895600A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895599A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895597A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895595A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895602A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895592A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN113739461A (en) * | 2020-05-27 | 2021-12-03 | 广东芬尼克兹节能设备有限公司 | Defrosting control method of heat pump unit, electronic equipment and storage medium |
| CN114413414A (en) * | 2021-12-14 | 2022-04-29 | 珠海格力电器股份有限公司 | Defrosting exit judgment method and air conditioning system |
| CN115654777A (en) * | 2022-11-09 | 2023-01-31 | 南京天加环境科技有限公司 | Defrosting control method and device and heat pump unit |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575998A (en) * | 2017-09-08 | 2018-01-12 | 青岛海尔空调器有限总公司 | The defrosting control method of air-conditioning and its outdoor unit |
| 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 |
| CN110631186A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN110631186B (en) * | 2018-06-25 | 2021-07-23 | 重庆海尔空调器有限公司 | Defrosting control method and device for air conditioner |
| CN111895599A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895595B (en) * | 2019-05-06 | 2022-05-31 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895597A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895595A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895602A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895592A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895597B (en) * | 2019-05-06 | 2022-07-19 | 武汉海尔电器股份有限公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895592B (en) * | 2019-05-06 | 2022-06-14 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895602B (en) * | 2019-05-06 | 2021-12-21 | 重庆海尔空调器有限公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111895600A (en) * | 2019-05-06 | 2020-11-06 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN111306658A (en) * | 2020-03-06 | 2020-06-19 | 宁波德业科技股份有限公司 | Defrosting method of dehumidifier |
| CN113739461A (en) * | 2020-05-27 | 2021-12-03 | 广东芬尼克兹节能设备有限公司 | Defrosting control method of heat pump unit, electronic equipment and storage medium |
| CN113739461B (en) * | 2020-05-27 | 2022-12-23 | 广东芬尼克兹节能设备有限公司 | Defrosting control method of heat pump unit, electronic equipment and storage medium |
| CN114413414A (en) * | 2021-12-14 | 2022-04-29 | 珠海格力电器股份有限公司 | Defrosting exit judgment method and air conditioning system |
| CN115654777A (en) * | 2022-11-09 | 2023-01-31 | 南京天加环境科技有限公司 | Defrosting control method and device and heat pump unit |
| CN115654777B (en) * | 2022-11-09 | 2023-12-15 | 南京天加环境科技有限公司 | Defrosting control method and device and heat pump unit |
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Application publication date: 20170322 |