CN108592295A - Air conditioner defrosting control method - Google Patents
Air conditioner defrosting control method Download PDFInfo
- Publication number
- CN108592295A CN108592295A CN201810510563.3A CN201810510563A CN108592295A CN 108592295 A CN108592295 A CN 108592295A CN 201810510563 A CN201810510563 A CN 201810510563A CN 108592295 A CN108592295 A CN 108592295A
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- air conditioner
- heating capacity
- max
- control method
- defrosting control
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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
- F24F11/30—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
- 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
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to air conditioner technical fields, and in particular to a kind of air conditioner defrosting control method.Room temperature fluctuation is excessive when defrosting in order to prevent, and air conditioner defrosting control method proposed by the present invention includes：After air conditioner starts heating operation, the maximum heating capacity Q of air conditioner is calculatedmax；After air conditioner reaches maximum heating capacity, the real-time heating capacity Q of air conditioner is calculated；Compare Q and Qmax, and judged whether according to comparison result that air conditioner to be made to enter defrosting mode；Wherein, Qmax=(Q1+Q2+…Qm)/m；QmStart heating operation after the heating capacity of air conditioner no longer increases for air conditioner, every the heating capacity for the air conditioner that the first preset time obtains, and works as Qm/QM-1Stop calculating Q when ＜ setting valuesmValue, Qm‑1For QmThe last heating capacity of air conditioner calculated.The present invention using the variation of heating capacity judges whether that air conditioner is made to enter defrosting mode, so that the influence during reducing defrosting to the full extent to indoor temperature, makes the fluctuation that indoor temperature is not in larger.
Description
Technical field
The invention belongs to air conditioner technical fields, and in particular to a kind of air conditioner defrosting control method.
Background technology
Air conditioner as a kind of equipment that can adjust indoor environment temperature, its working principle is that：It is being followed by refrigerant
Between endless tube road by the state of high voltage/low voltage/gaseous state/liquid convert make indoor environment temperature reduce or increase, i.e., from
From the perspective of indoor unit, air conditioner is in refrigeration or heating condition.When air conditioner heat-production is run, in certain humidity item
If outdoor coil temperature is too low to lead to frosting situation under part, and outdoor coil pipe used frosting can cause the heat exchange of outdoor heat exchanger to be imitated
Rate reduces, and influences the heating effect of air conditioner, reduces the comfort of indoor environment, influence user experience.Therefore, at air conditioner
In the case of heating condition, the outdoor coil pipe used progress to air conditioner is needed effectively to defrost in time.
Existing domestic air conditioner is in running heating operations, if outside humidity is larger, reaches the condition of frosting, outdoor
Chance frosting, and what frosting directly affected is exactly heating capacity, with the increasing of frosting degree, heating capacity continuous decrement, room temperature
Degree will appear fluctuation.Defrost operation must be carried out when decaying to a certain extent.When existing air conditioner is usually using operation
Between+outdoor coil temperature goes to judge whether to enter defrosting, but this mode can not directly embody the practical heating capacity of air-conditioning
Attenuation degree, i.e., under different operating modes, the corresponding heating capacity decaying of identical outer coil temperature attenuation degree is different, very
Active influence user uses the decaying of heating capacity.
Based on this, spy proposes the present invention.
Invention content
In order to solve the above problem in the prior art, room temperature fluctuation is excessive when defrosting in order to prevent, and the present invention carries
A kind of air conditioner defrosting control method is gone out, the defrosting control method includes the following steps：Start heating operation in air conditioner
Afterwards, the maximum heating capacity Q of air conditioner is calculatedmax；After air conditioner reaches maximum heating capacity, the real-time heating capacity of air conditioner is calculated
Q；Compare Q and Qmax, and judged whether according to comparison result that air conditioner to be made to enter defrosting mode；Wherein, Qmax=(Q1+Q2+…
Qm)/m；QmStart heating operation after the heating capacity of air conditioner no longer increases for air conditioner, is obtained every the first preset time
The heating capacity of the air conditioner taken, and work as Qm/QM-1Stop calculating Q when ＜ setting valuesmValue, Qm-1For QmLast calculate
Heating capacity of air conditioner.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " the maximum heating capacity Q of air conditioner is calculatedmax”
The step of include：After air conditioner starts heating operation, the temperature T of an indoor coil is obtained every the second preset timecAnd
The temperature T of indoor environmentr；The heating capacity Q in each periodn=kf (Tc- Tr), n is the integer more than or equal to 1；Work as Qn+1-Qn≤0
When, since current period, the temperature T of an indoor coil is obtained every the first preset timemcAnd the temperature of indoor environment
Tmr；Qm=kf (Tmc- Tmr)；Wherein, k is the coefficient of heat transfer of indoor heat exchanger and air；F is heat exchange area.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, first preset time is the 40-80 seconds
Between random time；Second preset time is the random time between 40-80 seconds.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, first preset time is 60 seconds；It is described
Second preset time is 60 seconds.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, the setting value is 0.9.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " the real-time heating capacity Q's for calculating air conditioner "
Step includes：The temperature t of indoor coil is obtained in real timecAnd the temperature t of indoor environmentr；The real-time heating capacity Q=kf of air conditioner
(tc- tr)；Wherein, k is the coefficient of heat transfer of indoor heat exchanger and air；F is heat exchange area.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " compare Q and Qmax, and sentenced according to comparison result
It is disconnected whether air conditioner to be made to enter defrosting mode " the step of include：If Q/QmaxWhen less than or equal to the first preset value, make air conditioner
Into defrosting mode.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " compare Q and Qmax, and sentenced according to comparison result
It is disconnected whether air conditioner to be made to enter defrosting mode " the step of further include：If Q/QmaxMore than the first preset value, and less than or equal to the
When two preset values, by the step number of throttle valve opening increase setting, and/or increase the rotation speed of fan of outdoor unit.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " compare Q and Qmax, and sentenced according to comparison result
It is disconnected whether air conditioner to be made to enter defrosting mode " the step of further include：If Q/QmaxMore than the second preset value, then air conditioner is set to tie up
Hold current heating condition.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, first preset value is 0.6, described second
Preset value is 0.8.
The present invention using the variation of the heating capacity of air conditioner judges whether that air conditioner is made to enter defrosting mode, in maximum
Reduce the influence to indoor temperature during defrosting in degree, makes the fluctuation that indoor temperature is not in larger.Also, the present invention
It can be further reduced defrosting number in such a way that the variation of heating capacity judges whether into defrosting, reduce defrosting frequency, together
When can also ensure that the comfort of user.
Description of the drawings
Fig. 1 is the broad flow diagram of the air conditioner defrosting control method of the present invention；
Fig. 2 is the detail flowchart of the air conditioner defrosting control method of the present invention.
Specific implementation mode
To keep the embodiment of the present invention, technical solution and advantage more obvious, below in conjunction with attached drawing to the skill of the present invention
Art scheme is clearly and completely described, it is clear that and the embodiment described is a part of the embodiment of the present invention, rather than all
Embodiment.It will be apparent to a skilled person that these embodiments are used only for explaining the technical principle of the present invention, and
It is not intended to be limiting protection scope of the present invention.
As shown in Figure 1, the defrosting control method of the present invention includes：S110, after air conditioner starts heating operation, calculate empty
Adjust the maximum heating capacity Q of devicemax；S120, after air conditioner reaches maximum heating capacity, calculate the real-time heating capacity Q of air conditioner；
S130, compare Q and Qmax, and judged whether according to comparison result that air conditioner to be made to enter defrosting mode；Wherein, Qmax=(Q1+Q2+…
Qm)/m；QmStart heating operation after the heating capacity of air conditioner no longer increases for air conditioner, is obtained every the first preset time
The heating capacity of the air conditioner taken, also, work as Qm/QM-1Stop obtaining Q when ＜ setting valuesmValue, Qm-1For QmLast calculate
Heating capacity of air conditioner.Specifically, after the heating capacity of air conditioner no longer increases, illustrate that the heating capacity of air conditioner has reached most
Big value, in order to more accurately calculate the maximum heating capacity Q of air conditionermax, the system of an air conditioner is calculated every the first preset time
Heat Qm, until Qm/QM-1Stop calculating Q when ＜ setting valuesmValue, calculate all heating capacity of air conditioner Q calculated during thism's
Average value, using the average value calculated as the maximum heating capacity Q of air conditionermax。
It will be readily appreciated by those skilled in the art that after the heating capacity of air conditioner reaches maximum value, in lasting heating
In the process, heating capacity has small-scale normal fluctuation, until Qm/QM-1When ＜ setting values, illustrate that the heating capacity of air conditioner starts
The average value of decaying, all heating capacities being calculated in the meantime every the first preset time is heated as the maximum of air conditioner
Measure QmaxIt can more accurately reflect maximum heating capacity of the air conditioner under frost-free state.As an example, the first preset time is
60s, setting value 0.9.
It will be appreciated to those of skill in the art that air conditioner frosting directly affected is indoor heating capacity, and heat
The variation of amount can cause indoor temperature to fluctuate, to influence the comfort of user.Existing defrosting control mode is simultaneously
The attenuation degree that the practical heating capacity of air conditioner cannot directly be embodied, i.e., under different operating modes, identical outer coil temperature decaying
The corresponding heating capacity decaying of degree is different.And the present invention judges whether to defrost according to the variation of heating capacity of air conditioner,
To the influence to indoor temperature during reduction defrosting to the full extent, make the fluctuation that indoor temperature is not in larger.
Also, the present invention can be further reduced defrosting number in such a way that the variation of heating capacity judges whether into defrosting, reduce
Defrost frequency, while can also ensure that the comfort of user.
Referring to the detail flowchart of Fig. 2 air conditioner defrosting control methods that the present invention will be described in detail.As shown in Fig. 2,
Step S210 is first carried out, after air conditioner starts heating operation, calculates the maximum heating capacity Q of air conditionermax.In this step,
QmaxComputational methods it is as follows：After air conditioner starts heating operation, an indoor coil is obtained every 60s (the second preset time)
Temperature TcAnd the temperature T of indoor environmentr；The heating capacity Q of each period (per 60s a cycles)n=kf (Tc- Tr), the public affairs
Formula is the calculation formula in the case that indoor fan rotating speed is constant；Work as Qn+1-QnWhen≤0, Qn+1For QnThe heating capacity in next period,
Illustrate that the heating capacity of air conditioner no longer increases, then since current period, is obtained every 60s (the first preset time) primary indoor
The temperature T of coil pipemcAnd the temperature T of indoor environmentmr；Heating capacity of air conditioner Qm=kf (Tmc- Tmr), work as Qm/Qm-1When ＜ 0.9,
Stop calculating QmIf amounting to calculated 10 groups of heating capacity of air conditioner at this time, then Q is calculatedmax=(Q1+Q2+…Q10)/10.Wherein, k
For the coefficient of heat transfer of indoor heat exchanger and air；F is heat exchange area.
It should be noted that above-mentioned the first preset time and the second preset time is exemplary illustration, this field skill
Art personnel can set other rational times according to practical application scene.
After step S210, executes step S220, after air conditioner reaches maximum heating capacity, calculate the real-time of air conditioner
Heating capacity Q.In this step, the computational methods of heating capacity Q are：The temperature t of indoor coil is obtained in real timecAnd indoor environment
Temperature tr；The real-time heating capacity Q=kf (t of air conditionerc- tr), which is the calculating in the case that indoor fan rotating speed is constant
Formula；K is the coefficient of heat transfer of indoor heat exchanger and air；F is heat exchange area.It will be appreciated to those of skill in the art that empty
Adjust the real-time heating capacity Q of device can also be in the maximum heating capacity Q for calculating air conditionermaxStart to calculate again later, and in air-conditioning
Indoor fan is in same rotating speed in device heating process.
Subsequently into step S230, calculate Q/QmaxRatio.Frosting and frosting thickness are started in the non-frosting of air conditioner or just
In the case that degree is little, there is not greater attenuation, i.e. Q/Q in QmaxValue close to 1.In the case where air conditioner enters frosting state, air conditioner
Exchange capability of heat will start to decay, cause heating capacity Q decline, work as Q/Qmax＞ 0.8, illustrate the heating capacity Q of air conditioner decline compared with
It is few, S240 is entered step at this time, air conditioner maintains current heating condition.
Work as Q/QmaxWhen≤0.8, enters step S250, judges Q/QmaxWhether 0.6 is more than.If Q/Qmax＞ 0.6, i.e. room
Interior heating capacity drops to maximum heating capacity Qmax60%-80% between when, illustrate that the heating capacity Q of air conditioner has by a relatively large margin
Decline, it is also possible to substantially meet indoor heating demands, enters step S260 at this time, increases the throttle valve opening of air conditioner
Big 50 step, while increasing the rotation speed of fan of outdoor unit.Frosting velocity can be effectively reduced in this way, to delay frosting.
Work as Q/QmaxWhen≤0.6, illustrating the frosting of air conditioner than more serious, the exchange capability of heat of air conditioner is greatly lowered, this
When enter step S270, air conditioner made to enter defrosting mode.
It should be noted that numerical value 0.6 and 0.8 among the above is only illustrated as example.Those skilled in the art can
To select other rational first preset values and the second preset value to replace 0.6 and 0.8 respectively according to the practical application of air conditioner.
In conclusion the present invention using the variation of the heating capacity of air conditioner judges whether that air conditioner is made to enter defrosting mode,
To the influence to indoor temperature during reduction defrosting to the full extent, make the fluctuation that indoor temperature is not in larger.
Also, the present invention can be further reduced defrosting number in such a way that the variation of heating capacity judges whether into defrosting, reduce
Defrost frequency, while can also ensure that the comfort of user.
So far, it has been combined preferred embodiment shown in the drawings and describes technical scheme of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific implementation modes.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make the relevant technologies feature equivalent change or replacement, these
Technical solution after change or replacement is fallen within protection scope of the present invention.
Claims (10)
1. a kind of air conditioner defrosting control method, which is characterized in that the defrosting control method includes the following steps：
After air conditioner starts heating operation, the maximum heating capacity Q of air conditioner is calculatedmax；
After air conditioner reaches maximum heating capacity, the real-time heating capacity Q of air conditioner is calculated；
Compare Q and Qmax, and judged whether according to comparison result that air conditioner to be made to enter defrosting mode；
Wherein, Qmax=(Q1+Q2+…Qm)/m；QmStart heating operation for air conditioner until the heating capacity of air conditioner no longer increases it
Afterwards, the heating capacity of the air conditioner obtained every the first preset time, and work as Qm/QM-1Stop calculating Q when ＜ setting valuesmValue,
Qm-1For QmThe last heating capacity of air conditioner calculated.
2. air conditioner defrosting control method according to claim 1, which is characterized in that " calculate the maximum heating of air conditioner
Measure Qmax" the step of include：
After air conditioner starts heating operation, the temperature T of an indoor coil is obtained every the second preset timecAnd indoor environment
Temperature Tr；
The heating capacity Q in each periodn=kf (Tc- Tr), n is the integer more than or equal to 1；
Work as Qn+1-QnWhen≤0, since current period, the temperature T of an indoor coil is obtained every the first preset timemcAnd
The temperature T of indoor environmentmr；
Qm=kf (Tmc- Tmr)；
Wherein, k is the coefficient of heat transfer of indoor heat exchanger and air；F is heat exchange area.
3. air conditioner defrosting control method according to claim 2, which is characterized in that first preset time is 40-
Random time between 80 seconds；
Second preset time is the random time between 40-80 seconds.
4. air conditioner defrosting control method according to claim 3, which is characterized in that first preset time is 60
Second；Second preset time is 60 seconds.
5. air conditioner defrosting control method according to claim 1, which is characterized in that the setting value is 0.9.
6. air conditioner defrosting control method according to claim 1, which is characterized in that " calculate the real-time heating of air conditioner
Measure Q " the step of include：
The temperature t of indoor coil is obtained in real timecAnd the temperature t of indoor environmentr；
The real-time heating capacity Q=kf (t of air conditionerc- tr)；
Wherein, k is the coefficient of heat transfer of indoor heat exchanger and air；F is heat exchange area.
7. air conditioner defrosting control method according to any one of claim 1 to 6, which is characterized in that " compare Q and
Qmax, and judged whether according to comparison result that air conditioner to be made to enter defrosting mode " the step of include：
If Q/QmaxWhen less than or equal to the first preset value, air conditioner is made to enter defrosting mode.
8. air conditioner defrosting control method according to claim 7, which is characterized in that " compare Q and Qmax, and according to comparing
As a result judge whether that air conditioner is made to enter defrosting mode " the step of further include：
If Q/QmaxMore than the first preset value, and less than or equal to the second preset value when, by throttle valve opening increase setting step
Number, and/or increase the rotation speed of fan of outdoor unit.
9. air conditioner defrosting control method according to claim 8, which is characterized in that " compare Q and Qmax, and according to comparing
As a result judge whether that air conditioner is made to enter defrosting mode " the step of further include：
If Q/QmaxMore than the second preset value, then air conditioner is made to maintain current heating condition.
10. air conditioner defrosting control method according to claim 9, which is characterized in that first preset value is 0.6,
Second preset value is 0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810510563.3A CN108592295A (en) | 2018-05-24 | 2018-05-24 | Air conditioner defrosting control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810510563.3A CN108592295A (en) | 2018-05-24 | 2018-05-24 | Air conditioner defrosting control method |
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Family
ID=63629115
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| CN201810510563.3A Pending CN108592295A (en) | 2018-05-24 | 2018-05-24 | Air conditioner defrosting control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323368A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | Air-conditioning and its defrosting method and device |
| CN109323369A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | Air-conditioning and its defrosting method and device |
| CN109323370A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | Air-conditioning and its defrosting method and device |
| CN111442473A (en) * | 2020-03-30 | 2020-07-24 | 青岛海尔空调器有限总公司 | Control method of air conditioner |
| CN112781287A (en) * | 2020-07-28 | 2021-05-11 | 青岛海尔新能源电器有限公司 | Defrosting method and water heater |
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| CN103216981A (en) * | 2013-04-28 | 2013-07-24 | 宁波沃弗圣龙环境技术有限公司 | Frostless air handling unit and proportion-integration-differential control method thereof |
| CN105318619A (en) * | 2015-10-23 | 2016-02-10 | 珠海格力电器股份有限公司 | air conditioner defrosting control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323368A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | Air-conditioning and its defrosting method and device |
| CN109323369A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | Air-conditioning and its defrosting method and device |
| CN109323370A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | Air-conditioning and its defrosting method and device |
| CN109323368B (en) * | 2018-09-30 | 2020-10-30 | 广东美的制冷设备有限公司 | Air conditioner and defrosting method and device thereof |
| CN111442473A (en) * | 2020-03-30 | 2020-07-24 | 青岛海尔空调器有限总公司 | Control method of air conditioner |
| CN112781287A (en) * | 2020-07-28 | 2021-05-11 | 青岛海尔新能源电器有限公司 | Defrosting method and water heater |
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