CN108826612A - Air-conditioner defrosting four-way valve method for handover control and air-conditioning - Google Patents
Air-conditioner defrosting four-way valve method for handover control and air-conditioning Download PDFInfo
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- CN108826612A CN108826612A CN201810397402.8A CN201810397402A CN108826612A CN 108826612 A CN108826612 A CN 108826612A CN 201810397402 A CN201810397402 A CN 201810397402A CN 108826612 A CN108826612 A CN 108826612A
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- Prior art keywords
- defrosting
- air
- way valve
- valve
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- 238000010257 thawing Methods 0.000 title claims abstract description 62
- 238000004378 air conditioning Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 230000007613 environmental effect Effects 0.000 claims description 8
- 238000011897 real-time detection Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000011067 equilibration Methods 0.000 abstract description 4
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000009423 ventilation 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
- F24F11/70—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
- F24F11/30—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
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/62—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
-
- 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
- F24F11/85—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 variable-flow pumps
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)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses air-conditioner defrosting four-way valve method for handover control and air-conditionings, include the following steps：S1：When air-conditioning enters heating mode, judge whether to enter defrosting control, if otherwise stablizing heating mode operation by former, if S2：Compressor out of service makes electric expansion valve enter full-gear and timing；S3：After timing reaches the first duration of valve opening, four-way valve is made to commutate, while starting compressor and carrying out defrosting；S4：After the completion of defrosting, compressor out of service makes electric expansion valve enter full-gear and timing；S5：After timing reaches the second duration of valve opening, four-way valve is made to commutate, while starting compressor and restoring heating operation；S6：When reaching the condition for entering defrosting control, step S2 is executed.The present invention is not only able to the switching noise of four-way valve during elimination air-conditioning defrosting front and back, also shortens the equilibration time of system height pressure difference, and then shorten the defrosting time of air-conditioning, significantly improves the comfort that air-conditioning uses.
Description
Technical field
The invention belongs to air-conditioning technical fields, and in particular to a kind of air-conditioner defrosting four-way valve method for handover control and air-conditioning.
Background technique
Frequency conversion heat pump air conditioner outdoor heat exchanger during low-temperature heating unavoidably will appear frosting situation at present, and
As time longer frost thickness can gradually increase, it will lead to air conditioning capacity and gradually decrease, therefore be maintenance system exchange capability of heat,
Improve heat exchanger heat exchange efficiency, it is necessary to commutate by four-way Vavle switching by refrigerant and carry out defrosting, but due to cold in commutation process
The presence of matchmaker's height pressure difference will appear a biggish switching noise, and very poor subjective feeling, existing solution are brought to consumer
Certainly there are mainly two types of schemes：One is defrosting is not shut down, compressor frequency is reduced to a certain range again when entering and exiting
Switching four-way valve commutates, the low-frequency mode of this drop can reduce to a certain degree four-way Vavle switching pressure difference and it is time-consuming compared with
Short, but since compressor is still operating, system height pressure difference exists always, and still there is more apparent switching noise in when switching,
Improvement is not obvious；Another kind is to shut down defrosting, is handled compressor shutdown before switching four-way valve before and after defrosting, wait be
Switch four-way valve again after system height pressure difference complete equipilibrium, although this mode can guarantee that switching is made an uproar before and after eliminating four-way valve defrosting
Sound, but this pressure equalization process time is longer, defrosting front and back at least needs each shutdown 1 minute, it can significantly extend defrosting time,
Since defrosting process air-conditioning does not provide heat to room, will lead to room temperature is persistently reduced, and brings discomfort to consumer
By.Therefore heat pump air conditioner low-temperature heating defrosting bring noise or comfortableness problem cannot be solved perfectly in both schemes.
Summary of the invention
For the deficiency in the presence of the prior art, during capable of being eliminated before and after air-conditioning defrosting the present invention provides one kind
The switching noise of four-way valve, the equilibration time that system height pressure difference can be shortened, the air-conditioning for improving the comfort that air-conditioning uses
Defrost four-way valve method for handover control and air-conditioning.
Air-conditioner defrosting four-way valve method for handover control, includes the following steps：
S1：When air-conditioning enters heating mode, whether real-time judge reaches the condition into defrosting control, executes if reaching
Step S2 stablizes heating mode operation by former if not up to；
S2：Compressor out of service makes electric expansion valve enter full-gear and be started according to default first duration of valve opening
Timing；
S3：After timing reaches the first duration of valve opening, four-way valve is made to commutate, while starting compressor and carrying out defrosting；
S4：After the completion of defrosting, compressor out of service makes electric expansion valve enter full-gear and according to default second
Duration of valve opening starts timing；
S5：After timing reaches the second duration of valve opening, four-way valve is made to commutate, while starting compressor and restoring heating operation；
S6：When reaching the condition for entering defrosting control, step S2 is executed.
Further, first duration of valve opening is 20~30 seconds, and second duration of valve opening is 20~30 seconds.
Further, the sum of first duration of valve opening and the second duration of valve opening are no more than 50 seconds.
A kind of air-conditioning, using air-conditioner defrosting four-way valve method for handover control described in any of the above-described scheme, including compressor,
Electric expansion valve, four-way valve further include：
Control unit：For receiving sensor detection environmental parameter and judge whether enter defrosting control, control compression
The opening and closing of machine, the commutation for controlling four-way valve and the aperture for adjusting electric expansion valve；
Clock module：Timing is carried out according to valve opening of preset first, second duration of valve opening to electric expansion valve；
Sensor：For real-time detection about the environmental parameter for entering defrosting control；
Described control unit is electrically connected with compressor, electric expansion valve, four-way valve, clock module and sensor respectively.
Compared with the prior art, the present invention has the advantages that：
By being fully opened in compressor shutdown before and after defrosting, while by volume control device such as electric expansion valve, allow
System quickly completes pressure balance, not only effectively eliminates process four-way valve switching noise before and after heat pump air conditioner defrosting, also obvious
System height pressure difference equilibration time is shortened, and then shortens the heat pump air conditioner low-temperature heating defrosting time, restores heating operation rapidly,
Improve the comfort that air-conditioning uses.
Detailed description of the invention
Fig. 1 is schematic process flow diagram of the invention.
Specific embodiment
In order to which the technical means, creative features, achievable purpose and effectiveness for realizing invention are easy to understand, below with reference to
It is specifically illustrating, the present invention is further explained.
Air-conditioner defrosting four-way valve method for handover control, includes the following steps：
S1：When air-conditioning enters heating mode, whether real-time judge reaches the condition into defrosting control, executes if reaching
Step S2 stablizes heating mode operation by former if not up to；
S2：Compressor out of service makes electric expansion valve enter full-gear and be started according to default first duration of valve opening
Timing；
S3：After timing reaches the first duration of valve opening, four-way valve is set to commutate, the electric expansion valve is adjusted to be suitable for melting
The aperture of frost, while starting compressor and carrying out defrosting；
S4：After the completion of defrosting, compressor out of service makes electric expansion valve enter full-gear and according to default second
Duration of valve opening starts timing；
S5：After timing reaches the second duration of valve opening, four-way valve is set to commutate, the electric expansion valve is adjusted to be suitable for making
The aperture of heat, while starting compressor and restoring heating operation；
S6：When reaching the condition for entering defrosting control, step S2 is executed.
As optimization, first duration of valve opening can be 20~30 seconds, and second duration of valve opening can be 20~30
Second.Particularly, the sum of first duration of valve opening and the second duration of valve opening are no more than 50 seconds.
When due to low-temperature heating, outdoor heat exchanger, can be gradually in heat exchanger surface shape since evaporator refrigerant temperature is lower than 0 degree
At frost layer, the time is more long, and frost layer is thicker, this can seriously affect system ventilation and heat exchange and air-conditioning reliability, therefore work as and reach one
Defrosting control can be entered by determining degree air-conditioning.Judging whether can be by outside atmosphere temperature, evaporating temperature etc. into defrosting control
Environmental parameter is detected and is compared, because belonging to the prior art, therefore not to repeat here.The former stable heating refers to that outdoor is changed
Hot device does not have the state of frosting, and this status system is relatively stable, and system will not be caused to enter unstable heating shape because of frosting
State.The full-gear of the electric expansion valve refers to state when electronic expansion valve opening is set as maximum.When first valve opening
Between refer to defrosting start before compressor it is out of service after electric expansion valve keep maximum opening time, which is to guarantee
System pressure can prestissimo reach balance and set.Second duration of valve opening refers to that defrosting completion, compressor are out of service
Afterwards electric expansion valve keep maximum opening time, the time also for guarantee system pressure can prestissimo reach balance
And it sets.The four-way valve just commutates after system pressure reaches balance, and commutation allows air-conditioning to enter defrosting from heating state for the first time
State, second of commutation allow air-conditioning to return to heating state from defrosting state.
The present invention by beating completely in compressor shutdown before and after defrosting, while by volume control device such as electric expansion valve
It opens, system is allowed to quickly complete pressure balance, not only effectively eliminate process four-way valve switching noise before and after heat pump air conditioner defrosting, also
It has been obviously shortened system height pressure difference equilibration time, and then has shortened the heat pump air conditioner low-temperature heating defrosting time, has restored heating rapidly
Operation, improves the comfort that air-conditioning uses.The present invention is because non-stop-machine talk about howsoever using the scheme for shutting down defrosting
Frequency is reduced, as long as compressor is also operating, pressure difference is certainly existed and can not be balanced, even if electric expansion valve standard-sized sheet pair at this time
The improvement of noise is also very limited, it is difficult to compare with the effect of elimination noise of the invention.When shutting down by expansion valve in the present invention
It opens to the maximum, system can be allowed quickly to reach pressure balance, the sum of the downtime for front and back of defrosting can shorten to 1 minute
Even compared with existing shutdowns defrosting scheme within 50 seconds, less down time more than half, very to comfort promotion
Obviously.
A kind of air-conditioning, using aforementioned any air-conditioner defrosting four-way valve method for handover control, including compressor, electronic expansion
Valve, four-way valve further include：
Control unit：Environmental parameter for being detected according to sensor judges whether to enter defrosting control, control compressor
Opening and closing, control four-way valve commutation and adjust electric expansion valve aperture；
Clock module：Timing is carried out according to valve opening of preset first, second duration of valve opening to electric expansion valve；
Sensor：For real-time detection about the environmental parameter for entering defrosting control；
Described control unit electrically connects with the compressor, electric expansion valve, four-way valve, clock module and sensor respectively
It connects.Described control unit can be using devices such as MCU or PLC.
The environmental parameter about entrance defrosting control may include outside atmosphere temperature, outdoor evaporating temperature etc..
The foregoing is merely the preferred embodiment of the present invention, protection scope of the present invention is not limited in above-mentioned embodiment party
Formula, all technical solutions for belonging to the principle of the invention all belong to the scope of protection of the present invention.For those skilled in the art and
Speech, several improvement carried out without departing from the principles of the present invention, these improvement also should be regarded as protection model of the invention
It encloses.
Claims (4)
1. air-conditioner defrosting four-way valve method for handover control, it is characterised in that include the following steps：
S1：When air-conditioning enters heating mode, whether real-time judge reaches the condition into defrosting control, thens follow the steps if reaching
S2 stablizes heating mode operation by former if not up to；
S2：Compressor out of service makes electric expansion valve enter full-gear and starts timing according to default first duration of valve opening；
S3：After timing reaches the first duration of valve opening, four-way valve is made to commutate, while starting compressor and carrying out defrosting；
S4：After the completion of defrosting, compressor out of service makes electric expansion valve enter full-gear and according to default second valve opening
Time starts timing；
S5：After timing reaches the second duration of valve opening, four-way valve is made to commutate, while starting compressor and restoring heating operation；
S6：When reaching the condition for entering defrosting control, step S2 is executed.
2. air-conditioner defrosting four-way valve method for handover control according to claim 1, it is characterised in that：
First duration of valve opening is 20~30 seconds, and second duration of valve opening is 20~30 seconds.
3. air-conditioner defrosting four-way valve method for handover control according to claim 2, it is characterised in that：
The sum of first duration of valve opening and the second duration of valve opening are no more than 50 seconds.
4. a kind of air-conditioning, it is characterised in that：Using the described in any item air-conditioner defrosting four-way valve switching controls of claim 1~2
Method, including compressor, electric expansion valve, four-way valve further include：
Control unit：For receiving sensor detection environmental parameter and judge whether to enter defrosting control, control compressor
Opening and closing, the commutation of control four-way valve and the aperture for adjusting electric expansion valve；
Clock module：Timing is carried out according to valve opening of preset first, second duration of valve opening to electric expansion valve；
Sensor：For real-time detection about the environmental parameter for entering defrosting control；
Described control unit is electrically connected with compressor, electric expansion valve, four-way valve, clock module and sensor respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397402.8A CN108826612A (en) | 2018-04-28 | 2018-04-28 | Air-conditioner defrosting four-way valve method for handover control and air-conditioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397402.8A CN108826612A (en) | 2018-04-28 | 2018-04-28 | Air-conditioner defrosting four-way valve method for handover control and air-conditioning |
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| Publication Number | Publication Date |
|---|---|
| CN108826612A true CN108826612A (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810397402.8A Pending CN108826612A (en) | 2018-04-28 | 2018-04-28 | Air-conditioner defrosting four-way valve method for handover control and air-conditioning |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579190A (en) * | 2018-12-25 | 2019-04-05 | 新奥数能科技有限公司 | A kind of method and apparatus of the determining heat pump unit compressor method of operation |
| CN110094832A (en) * | 2019-05-16 | 2019-08-06 | 滁州星联电子有限公司 | A kind of work Defrost method of convertible frequency air-conditioner |
| CN110726266A (en) * | 2019-10-17 | 2020-01-24 | 珠海格力电器股份有限公司 | Four-way valve liquid impact prevention control method and device and four-way valve |
| CN110887282A (en) * | 2019-11-29 | 2020-03-17 | 珠海格力电器股份有限公司 | Method for preventing liquid from being carried in heat exchanger and air conditioner |
| CN111156589A (en) * | 2020-01-02 | 2020-05-15 | 珠海格力电器股份有限公司 | Control method and device of air conditioner, air conditioning system, storage medium and processor |
| CN113294890A (en) * | 2021-05-07 | 2021-08-24 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device for air conditioning unit and air conditioning unit |
| CN114234368A (en) * | 2021-12-27 | 2022-03-25 | 珠海格力电器股份有限公司 | Control method, control device, and nonvolatile storage medium |
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| CN101233375A (en) * | 2005-06-06 | 2008-07-30 | 开利公司 | Method and controller for preventing flooded starts in a heat pump |
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| CN105352239A (en) * | 2015-11-02 | 2016-02-24 | 青岛海尔空调器有限总公司 | Control method of electronic expansion valve of air conditioner |
| CN106949679A (en) * | 2017-03-29 | 2017-07-14 | 广东美的制冷设备有限公司 | Air-conditioner and its defrosting control method |
| CN107923643A (en) * | 2015-08-18 | 2018-04-17 | 大金工业株式会社 | Air conditioner |
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| JP2003240391A (en) * | 2002-02-21 | 2003-08-27 | Mitsubishi Electric Corp | Air conditioner |
| CN1443985A (en) * | 2002-03-08 | 2003-09-24 | 乐金电子(天津)电器有限公司 | Control method of air conditioner |
| CN101233375A (en) * | 2005-06-06 | 2008-07-30 | 开利公司 | Method and controller for preventing flooded starts in a heat pump |
| CN101871684A (en) * | 2010-05-31 | 2010-10-27 | 广州松下空调器有限公司 | Defrosting control method of air conditioner |
| CN102062504A (en) * | 2010-12-24 | 2011-05-18 | 中国扬子集团滁州扬子空调器有限公司 | Split type heat pump frequency conversion air conditioner which is defrosting nonstop machine and defrosting control method |
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| US9239183B2 (en) * | 2012-05-03 | 2016-01-19 | Carrier Corporation | Method for reducing transient defrost noise on an outdoor split system heat pump |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579190A (en) * | 2018-12-25 | 2019-04-05 | 新奥数能科技有限公司 | A kind of method and apparatus of the determining heat pump unit compressor method of operation |
| CN110094832A (en) * | 2019-05-16 | 2019-08-06 | 滁州星联电子有限公司 | A kind of work Defrost method of convertible frequency air-conditioner |
| CN110726266A (en) * | 2019-10-17 | 2020-01-24 | 珠海格力电器股份有限公司 | Four-way valve liquid impact prevention control method and device and four-way valve |
| CN110887282A (en) * | 2019-11-29 | 2020-03-17 | 珠海格力电器股份有限公司 | Method for preventing liquid from being carried in heat exchanger and air conditioner |
| CN111156589A (en) * | 2020-01-02 | 2020-05-15 | 珠海格力电器股份有限公司 | Control method and device of air conditioner, air conditioning system, storage medium and processor |
| CN111156589B (en) * | 2020-01-02 | 2021-04-09 | 珠海格力电器股份有限公司 | Control method and device of air conditioner, air conditioning system, storage medium and processor |
| WO2021135528A1 (en) * | 2020-01-02 | 2021-07-08 | 珠海格力电器股份有限公司 | Control method and device for air conditioner, air conditioning system, storage medium, and processor |
| CN113294890A (en) * | 2021-05-07 | 2021-08-24 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device for air conditioning unit and air conditioning unit |
| CN113294890B (en) * | 2021-05-07 | 2022-07-08 | 宁波奥克斯电气股份有限公司 | Defrost control method and device for air conditioning unit and air conditioning unit |
| CN114234368A (en) * | 2021-12-27 | 2022-03-25 | 珠海格力电器股份有限公司 | Control method, control device, and nonvolatile storage medium |
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Application publication date: 20181116 |