CN109114748A - A kind of air-conditioning delays frosting control method, device and air conditioner - Google Patents
A kind of air-conditioning delays frosting control method, device and air conditioner Download PDFInfo
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- CN109114748A CN109114748A CN201810950612.5A CN201810950612A CN109114748A CN 109114748 A CN109114748 A CN 109114748A CN 201810950612 A CN201810950612 A CN 201810950612A CN 109114748 A CN109114748 A CN 109114748A
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- frosting
- air
- air conditioner
- compressor
- preset
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- 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 embodiment of the invention provides a kind of air-conditionings to delay frosting control method, device and air conditioner, by obtaining low pressure and outdoor evaporator inlet temperature every prefixed time interval；According to obtain low pressure and outdoor evaporator inlet temperature determine air conditioner whether frosting；When the air conditioner frosting, determine whether the compressor has enough reliabilities according to discharge superheat, when the compressor has enough reliabilities, controlling the compressor reduces working frequency, expansion valve increases aperture to prevent frosting from aggravating simultaneously, commutates and defrosts without outdoor fan, while guaranteeing that having enough discharge superheats not influences press reliability, it avoids frosting more and more thicker, improves the usage experience of user.
Description
Technical field
The present invention relates to air conditioner art field, in particular to a kind of air-conditioning delays frosting control method, device and air conditioner.
Background technique
As economic is constantly progressive, the application of air conditioner is also more and more extensive, adjusts indoor environment temperature due to that can pass through
For degree to bring comfortable experience for user, air conditioner becomes most commonly seen one of household electrical appliance.
In air-conditioning heating overheat when the temperature of the surroundings is low, it is bad to may cause outdoor unit heat exchanger evaporation, then causes
System return air pressure reduction.When pressure of inspiration(Pi) is lower than 0.7Mpa or outdoor heat exchanger inlet temperature is less than or equal to zero DEG C,
It outdoor evaporator surface will slowly frosting.Outdoor fan also declines because of the frosting air quantity that is obstructed simultaneously, gradually outdoor unit heat exchanger
Frosting thickeies heating effect decline, this is just to need the hot gas defrosting that commutates, and causes interior that can not continue heat supply.Currently available technology
Patent is to increase welding connecting tube to realize high-low pressure connection, and supplement low pressure by electromagnetic valve switch, is not only increased in this way
Addition sheet, and increase solder joint and reveal hidden danger, while the problems such as noise can be generated.
Summary of the invention
In view of this, the present invention is directed to propose a kind of air-conditioning delays frosting control method, device and air conditioner, on solving
State problem.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
In a first aspect, the present invention provides a kind of air-conditionings to delay frosting control method, it is applied to an air conditioner, the air-conditioning
The frosting control method is delayed to include:
Low pressure and outdoor evaporator inlet temperature are obtained every prefixed time interval；
According to obtain low pressure and outdoor evaporator inlet temperature determine air conditioner whether frosting；
When the air conditioner frosting, controls compressor and expansion valve executes preset operation to prevent frosting from aggravating.
Further, it when the air conditioner frosting, controls compressor and expansion valve executes preset operation to prevent from tying
Frost aggravation the step of include:
When the air conditioner frosting, determine whether the compressor has enough reliabilities according to discharge superheat；
When the compressor has enough reliabilities, control the compressor and expansion valve execute preset operation to prevent
Only frosting aggravates.
Further, the control compressor and expansion valve execute the step of preset operation is to prevent frosting from aggravating
Include:
Controlling the compressor reduces frequency operation until the low pressure and institute with preset rate from current frequency
It states outdoor evaporator inlet temperature and meets preset condition；
It controls the expansion valve and increases aperture until the discharge superheat is equal to or less than reliability thresholds.
Further, which comprises when the compressor reduces frequency to the low pressure and the outdoor steaming
When hair device inlet temperature meets preset condition, the first preset duration is run with the frequency after reducing.
Further, according to obtain low pressure and outdoor evaporator inlet temperature determine air conditioner whether the step of frosting
It suddenly include: less than the first preset pressure value or outdoor evaporator inlet temperature when the low pressure less than the first preset temperature value
When, determine the air conditioner frosting.
Further, the method also includes:
Obtain the outlet air temperature of the compressor；
Discharge superheat is calculated according to the outlet air temperature of the compressor every preset time interval.
Further, the preset condition includes:
The low pressure is greater than the second preset pressure value or the outdoor evaporator inlet temperature is greater than the second default temperature
Angle value.
Further, the preset rate is 2Hz/s.
Second aspect, the present invention provides a kind of air-conditionings to delay frosting control device, is applied to an air conditioner, the air-conditioning
The frosting control device is delayed to include:
Acquiring unit, for obtaining low pressure and outdoor evaporator inlet temperature every prefixed time interval；
Determination unit, for determining whether air conditioner is tied according to the low pressure and outdoor evaporator inlet temperature that obtain
Frost；
Adjustment unit, for when the air conditioner frosting, control compressor and expansion valve execute preset operation to prevent
Only frosting aggravates.
The third aspect, the present invention also provides a kind of air conditioner, the air conditioner includes:
Memory；
Controller；And
Air-conditioning delays frosting control device, and the air-conditioning delays frosting control device to be installed on the memory and including one
A or multiple software function modules executed by the controller, it includes: acquiring unit that the air-conditioning, which delays frosting control device,
For obtaining low pressure and outdoor evaporator inlet temperature every prefixed time interval；
Determination unit, for determining whether air conditioner is tied according to the low pressure and outdoor evaporator inlet temperature that obtain
Frost；
Adjustment unit, for when the air conditioner frosting, control compressor and expansion valve execute preset operation to prevent
Only frosting aggravates.
Compared with the existing technology, a kind of air-conditioning of the present invention delays frosting control method, device and air conditioner to have
Following advantage:
By obtaining low pressure and outdoor evaporator inlet temperature every prefixed time interval；According to the low pressure pressure obtained
Power and outdoor evaporator inlet temperature determine air conditioner whether frosting；It is true according to discharge superheat when the air conditioner frosting
Whether the fixed compressor has enough reliabilities, when the compressor has enough reliabilities, controls the compressor
Working frequency is reduced, while expansion valve increases aperture to prevent frosting from aggravating, and commutates and defrosts without outdoor fan, is guaranteeing there is foot
While enough discharge superheats do not influence press reliability, avoids frosting more and more thicker, improve the usage experience of user.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the functional block diagram of air conditioner provided in an embodiment of the present invention.
Fig. 2 is the flow chart that air-conditioning described in the embodiment of the present invention delays frosting control method.
Fig. 3 is the sub-step flow chart of S30 in Fig. 2.
Fig. 4 is the sub-step flow chart of S302 in Fig. 3.
Fig. 5 is the functional block diagram that air-conditioning provided in an embodiment of the present invention delays frosting control device.
Fig. 6 is the function unit figure of adjustment unit provided in an embodiment of the present invention.
Icon: 1- air conditioner；2- controller；3- memory；4- compressor；5- expansion valve；6- air-conditioning delays frosting control
Device；7- acquiring unit；8- determination unit；9- adjustment unit；10- reliability determines subelement；11- adjusts subelement.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
First embodiment
The embodiment of the invention provides a kind of air conditioners 1, for while adjusting room temperature, moreover it is possible to which realization removes automatically
Frost prevents frosting from causing air conditioner damage or failure.Referring to Fig. 1, being the functional block of air conditioner 1 provided in an embodiment of the present invention
Figure.The air conditioner 1 includes: that controller 2, memory 3, compressor 4, expansion valve 5 and air-conditioning delay frosting control device 6.Its
In, controller 2 is electrically connected with memory 3, compressor 4, expansion valve 5, and compressor frequency control method includes that at least one can
It is stored in the memory 3 in the form of software or firmware (firmware).
Wherein, memory 3 can be used for storing software program and unit, as the air-conditioning in the embodiment of the present invention delays frosting
Program instruction/unit corresponding to control device 6 and method, controller 2 are delayed by the air-conditioning that operation is stored in memory 3
Frosting control device 6, the software program of method and unit, thereby executing various function application and data processing, such as this hair
The compressor frequency control method that bright embodiment provides.Wherein, the memory may be, but not limited to, random access memory
Device (Random Access Memory, RAM), read-only memory (Read Only Memory, ROM), may be programmed read-only storage
Device (Programmable Read-Only Memory, PROM), erasable read-only memory (Erasable Programmable
Read-Only Memory, EPROM), electricallyerasable ROM (EEROM) (Electric Erasable Programmable
Read-Only Memory, EEPROM) etc..
The controller 2 is used to execute the executable module stored in the memory 3, such as the air-conditioning delays frosting
Software function module included by control device 6 and computer program etc..
It should be understood that structure shown in FIG. 1 is only the structural schematic diagram of air conditioner 1, the air conditioner 1 may also include
The more perhaps less component or with the configuration different from shown in Fig. 1 than shown in Fig. 1.Each component can shown in Fig. 1
To be realized using hardware, software, or its combination.
Second embodiment
It present embodiments provides a kind of air-conditioning and delays frosting control method, Fig. 2 shows air-conditionings provided in this embodiment to prolong
The flow chart of slow frosting control method.Air-conditioning provided in this embodiment delays frosting control method that can lead to when detecting frosting
The voluntarily defrost of air conditioner 1 is crossed, prevents frosting more and more thicker.
Referring to Fig. 2, it includes step S10~S30 that the air-conditioning, which delays frosting control method,.
Step S10: low pressure and outdoor evaporator inlet temperature are obtained every prefixed time interval.
After air conditioner 1 is stable, the low-pressure sensor of return-air low pressure line is obtained every prefixed time interval
The low pressure value P of detections, the outdoor of the temperature sensor detection of outdoor evaporator entrance is obtained every prefixed time interval
Evaporator temperature value Tdef。
After referring to that air conditioner 1 runs a period of time after air conditioner 1 is stable, for example, after ten minutes to the operation of air conditioner 1
The acquisition of low pressure and outdoor evaporator inlet temperature is carried out just now.The preset time interval can be according to air conditioner 1
Refrigeration or heating performance setting, such as institute's time interval can be 30s, but not limited to this.
Step S20: according to obtain low pressure and outdoor evaporator inlet temperature determine air conditioner 1 whether frosting.
Every preset time interval according to the low pressure value P obtainedsAnd outdoor evaporator inlet temperature TdefJudgement
Air conditioner 1 whether frosting.
In this present embodiment, as the low pressure value PsLess than the first preset pressure value or outdoor evaporator inlet temperature
Value TdefWhen less than the first preset temperature value, 1 frosting of air conditioner is determined.Generally, set first preset pressure value as
0.5Mpa, the range of first preset temperature value are -3 DEG C~0 DEG C.For example, working as low pressure value PsLower than 0.5Mpa, or
Outdoor evaporator inlet temperature TdefWhen (i.e. defrosting temperature) is less than or equal to 0 DEG C, outdoor evaporator surface will slowly be tied
Frost.Outdoor fan also declines because of the frosting air quantity that is obstructed simultaneously, and gradually outdoor unit heat exchanger frosting thickeies heating effect decline, this is
The hot gas defrosting that commutates just is needed, causes interior that can not continue heat supply.
If it is determined that the non-frosting of air conditioner 1, then keep air conditioner 1 to continue to run；If it is determined that 1 frosting of air conditioner, then execute step
Rapid S30.
Step S30: it when 1 frosting of air conditioner, controls compressor 4 and expansion valve 5 executes preset operation to prevent
Frosting aggravation.
When determining 1 frosting of air conditioner, control compressor 4 reduces running frequency, while controlling the increase of expansion valve 5 and opening
Degree, to improve the low pressure of return-air low pressure line, to promote evaporating temperature, removes it quickly by the frost of formation.
In this present embodiment, referring to Fig. 3, step S30 includes sub-step S301~S302.
Step S301: when 1 frosting of air conditioner, according to discharge superheat TdshDetermine whether the compressor 4 has
Enough reliabilities.
When determining 1 frosting of air conditioner, first determine whether the compressor 4 has enough reliabilities.Compression
The reliability of machine 4 refers to that can compressor 4 work normally, and when the reliability deficiency of compressor 4, reflux is be easy to cause to lead to sky
It adjusts device 1 to damage, the operation of air conditioner 1 should be stopped immediately at this time.
In this present embodiment, determine whether compressor 4 has enough reliabilities according to the discharge superheat of compressor 4.
Firstly, detection obtains the outlet air temperature T of the compressor 4d；Generally, thoughts are arranged in the exhaust outlet of compressor 4
Thermometer bulb, for detecting delivery temperature, the air entry design of compressor 4 has temperature sensing package, for detecting suction temperature, outdoor heat exchanger
Inlet design has temperature sensing package, for detecting heating inlet temperature.
In this present embodiment, the delivery temperature of the compressor 4 of the temperature sensing package detection is obtained every preset time interval
Value Td.Every outlet air temperature T of the preset time interval according to the compressor 4dCalculate discharge superheat Tdsh。
According to discharge superheat TdshJudge whether compressor 4 has enough reliabilities.In this present embodiment, one is set
Reliability thresholds, the value range of the reliability thresholds are 15 DEG C~20 DEG C.When sentencing discharge superheat TdshGreater than reliability threshold
When value, when being greater than 20 DEG C, determine that the compressor 4 has enough reliabilities.
Step S302: when the compressor 4 has enough reliabilities, control the compressor 4 and expansion valve 5 execute it is pre-
If operation to prevent frosting from aggravating.
In this present embodiment, referring to Fig. 4, step S302 includes following sub- S3021~step S3022:
Step S3021: controlling the compressor 4 from current frequency reduces frequency operation until described low with preset rate
Pressure pressure and the outdoor evaporator inlet temperature meet preset condition.
The preset condition refers to that the low pressure is greater than the second preset pressure value or the outdoor evaporator import temperature
Degree is greater than the second preset temperature value.
Compressor 4 is controlled on the basis of current frequency, working frequency operation is reduced with preset rate.It is described preset
Rate can be 2Hz/s, but not limited to this, it can be set according to the performance parameter of the compressor 4 of air conditioner 1.Control institute
Compressor 4 is stated on the basis of current frequency, working frequency fortune is reduced with preset rate until the low pressure is greater than the
Two preset pressure values or the outdoor evaporator inlet temperature are greater than the second preset temperature value.
In this present embodiment, second preset pressure value is 7~7.5Mpa, and second preset temperature value is 2 DEG C.When
When meeting above-mentioned condition, illustrate that the temperature of heat exchanger has been above the second preset temperature value, it can be ensured that frostless.
It needs, in order to reduce system fluctuation, the amplitude of the droping frequency of the compressor 4 be must not exceed current
Frequency 30%, avoid system big ups and downs.
Meet default item when the compressor 4 reduces frequency to the low pressure and the outdoor evaporator inlet temperature
When part, the first preset duration is run to guarantee to defrost completely with the frequency after reducing.In this present embodiment, described first it is default when
A length of 30s, but not limited to this, it can also be other durations, the present embodiment is not construed as limiting this.
Step S3022: it controls the expansion valve 5 and increases aperture until the discharge superheat is equal to or less than reliability threshold
Value.
Based on the aperture current by expansion valve 5, increase preset aperture on the basis of current aperture.For example, being
Reduction system fluctuation, the current aperture for controlling the expansion valve 5 increases by 10 steps, until sentencing discharge superheat TdshIt is less than or waits
In reliability thresholds, in this present embodiment, the value range of the reliability thresholds is 15 DEG C~20 DEG C.It was vented when detecting
Temperature TdshWhen less than or equal to 15 DEG C, that is, stop opening greatly, to guarantee that compressor 4 there are enough discharge superheats to ensure reliability.
Outdoor heat exchanger surface thin layer frost, which has begun, at this time melts, and air quantity increases heat exchange and increases, compressor 4 and swollen
Swollen valve 5 can automatically control, can be to avoid knot while guaranteeing that having enough discharge superheats not influences 4 reliability of compressor
Frost is increasingly thicker.
3rd embodiment
Referring to Fig. 5, Fig. 5 is that a kind of air-conditioning that present pre-ferred embodiments provide delays frosting control device 6.It needs
Bright, air-conditioning provided by the present embodiment delays frosting control device 6, the technical effect of basic principle and generation and above-mentioned
First embodiment is essentially identical, and to briefly describe, the present embodiment part does not refer to place, can refer in above-mentioned first embodiment
Corresponding contents.
Referring to Fig. 5, it includes acquiring unit 7, determination unit 8 and adjustment unit that the air-conditioning, which delays frosting control device 6,
9。
Wherein, the acquiring unit 7 is used to obtain low pressure and outdoor evaporator import temperature every prefixed time interval
Degree.
After air conditioner 1 is stable, the low-pressure sensor of return-air low pressure line is obtained every prefixed time interval
The low pressure value P of detections, the outdoor of the temperature sensor detection of outdoor evaporator entrance is obtained every prefixed time interval
Evaporator temperature value Tdef。
It is to be appreciated that the acquiring unit 7 can be used for executing step S10 in a kind of preferred embodiment.
Determination unit 8, for determining whether air conditioner 1 is tied according to the low pressure and outdoor evaporator inlet temperature that obtain
Frost.
As the low pressure value PsLess than the first preset pressure value or outdoor evaporator inlet temperature TdefLess than first
When preset temperature value, 1 frosting of air conditioner is determined.Generally, first preset pressure value is set as 0.5Mpa, described
The range of one preset temperature value is -3 DEG C~0 DEG C.For example, working as low pressure value PsLower than 0.5Mpa or outdoor evaporator into
Mouth temperature value TdefWhen (i.e. defrosting temperature) is less than or equal to 0 DEG C, outdoor evaporator surface will slowly frosting.
If it is determined that the non-frosting of air conditioner 1, then keep air conditioner 1 to continue to run；If it is determined that 1 frosting of air conditioner, then removed
Frost operation.
It is to be appreciated that the determination unit 8 can be used for executing step S20 in a kind of preferred embodiment.
Adjustment unit 9, for when 1 frosting of air conditioner, control compressor 4 and expansion valve 5 to execute preset operation
To prevent frosting from aggravating.
When determining 1 frosting of air conditioner, control compressor 4 reduces running frequency, while controlling the increase of expansion valve 5 and opening
Degree, to improve the low pressure of return-air low pressure line, to promote evaporating temperature, removes it quickly by the frost of formation.
It is to be appreciated that adjustment unit 9 can be used for executing step S30 in a kind of preferred embodiment.
In this present embodiment, referring to Fig. 6, the adjustment unit 9 includes that reliability determines that subelement 10 and adjustment are single
Member 11.
The reliability determines that subelement 10 is used for when 1 frosting of air conditioner, according to discharge superheat TdshDetermine institute
State whether compressor 4 has enough reliabilities.
In this present embodiment, the delivery temperature of the compressor 4 of the temperature sensing package detection is obtained every preset time interval
Value Td.Every outlet air temperature T of the preset time interval according to the compressor 4dCalculate discharge superheat Tdsh。
According to discharge superheat TdshJudge whether compressor 4 has enough reliabilities.In this present embodiment, one is set
Reliability thresholds, the value range of the reliability thresholds are 15 DEG C~20 DEG C.When sentencing discharge superheat TdshGreater than reliability threshold
When value, when being greater than 20 DEG C, determine that the compressor 4 has enough reliabilities.
It is to be appreciated that the reliability determines that subelement 10 can be used for executing step in a kind of preferred embodiment
Rapid S301.
The adjustment subelement 11, for when the compressor 4 has enough reliabilities, control the compressor 4 and
Expansion valve 5 executes preset operation to prevent frosting from aggravating.
Specifically, the adjustment subelement 11 is reduced for controlling the compressor 4 from current frequency with preset rate
Frequency operation is until the low pressure and the outdoor evaporator inlet temperature meet preset condition.Wherein, the default item
Part refers to that the low pressure is greater than the second preset pressure value or the outdoor evaporator inlet temperature is greater than the second preset temperature
Value.Compressor 4 is controlled on the basis of current frequency, working frequency operation is reduced with preset rate.The preset rate
It can be 2Hz/s, but not limited to this, it can be set according to the performance parameter of the compressor 4 of air conditioner 1.Control the pressure
Contracting machine 4 reduces working frequency fortune on the basis of current frequency, with preset rate until the low pressure is greater than second in advance
If pressure value or the outdoor evaporator inlet temperature are greater than the second preset temperature value.
It needs, in order to reduce system fluctuation, the amplitude of the droping frequency of the compressor 4 be must not exceed current
Frequency 30%, avoid system big ups and downs.
The adjustment subelement 11, which is also used to control the compressor 4, reduces frequency to the low pressure and the outdoor
When evaporator temperature meets preset condition, the first preset duration is run to guarantee to defrost completely with the frequency after reducing.
Adjustment subelement 11 is also used to control the expansion valve 5 and increases aperture until the discharge superheat is equal to or less than
Reliability thresholds.
The adjustment subelement 11 is increased pre- based on the current aperture of expansion valve 5 on the basis of current aperture
If aperture.For example, the current aperture for controlling the expansion valve 5 increases by 10 steps in order to reduce system fluctuation, it was vented until sentencing
Temperature TdshLess than or equal to reliability thresholds, in this present embodiment, the value range of the reliability thresholds is 15 DEG C~20
℃.When detecting discharge superheat TdshWhen less than or equal to 15 DEG C, that is, stops opening greatly, be vented enough with guaranteeing that compressor 4 has
Temperature ensures reliability.
It is to be appreciated that the adjustment subelement 11 can be used for executing step S302 in a kind of preferred embodiment.
In conclusion a kind of air-conditioning provided in an embodiment of the present invention delays frosting control method, device and air conditioner, pass through
Low pressure and outdoor evaporator inlet temperature are obtained every prefixed time interval；According to the low pressure obtained and outdoor evaporation
Device inlet temperature determine air conditioner whether frosting；When the air conditioner frosting, the compressor is determined according to discharge superheat
Whether enough reliability is had, when the compressor has enough reliabilities, controlling the compressor reduces working frequency,
Expansion valve increases aperture to prevent frosting from aggravating simultaneously, commutates and defrosts without outdoor fan, is guaranteeing there are enough discharge superheats
It while not influencing press reliability, avoids frosting more and more thicker, improves the usage experience of user.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that function marked in the box can also be to be different from some implementations as replacement
The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes
It can execute in the opposite order, this depends on the function involved.It is also noted that every in block diagram and or flow chart
The combination of box in a box and block diagram and or flow chart can use the dedicated base for executing defined function or movement
It realizes, or can realize using a combination of dedicated hardware and computer instructions in the system of hardware.
In addition, each functional module in each embodiment of the present invention can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of air-conditioning delays frosting control method, which is characterized in that be applied to an air conditioner (1), the air-conditioning delays frosting
Control method includes:
Low pressure and outdoor evaporator inlet temperature are obtained every prefixed time interval；
According to obtain low pressure and outdoor evaporator inlet temperature determine air conditioner (1) whether frosting；
When the air conditioner (1) frosting, controls compressor (4) and expansion valve (5) executes preset operation to prevent frosting from adding
It is acute.
2. air-conditioning as described in claim 1 delays frosting control method, which is characterized in that when the air conditioner (1) frosting,
Controlling the step of compressor (4) and the preset operation of expansion valve (5) execution are to prevent frosting from aggravating includes:
When the air conditioner (1) frosting, it is enough reliable to determine whether the compressor (4) has according to discharge superheat
Property；
When the compressor (4) has enough reliabilities, controls the compressor (4) and expansion valve (5) executes preset behaviour
Make to prevent frosting from aggravating.
3. air-conditioning as claimed in claim 2 delays frosting control method, which is characterized in that the control compressor (4)
And expansion valve (5) execute it is preset operation to prevent frosting from aggravating the step of include:
Controlling the compressor (4) reduces frequency operation until the low pressure and described with preset rate from current frequency
Outdoor evaporator inlet temperature meets preset condition；
It controls the expansion valve (5) and increases aperture until the discharge superheat is equal to or less than reliability thresholds.
4. air-conditioning as claimed in claim 2 delays frosting control method, which is characterized in that the described method includes:
Meet preset condition when the compressor (4) reduce frequency to the low pressure and the outdoor evaporator inlet temperature
When, the first preset duration is run with the frequency after reducing.
5. air-conditioning as described in claim 1 delays frosting control method, which is characterized in that according to the low pressure and room obtained
Outer evaporator temperature determine air conditioner (1) whether frosting the step of include:
When the low pressure less than the first preset pressure value or outdoor evaporator inlet temperature less than the first preset temperature value when,
Determine the air conditioner (1) frosting.
6. air-conditioning as claimed in claim 2 delays frosting control method, which is characterized in that the method also includes:
Obtain the outlet air temperature of the compressor (4)；
Discharge superheat is calculated according to the outlet air temperature of the compressor (4) every preset time interval.
7. air-conditioning as claimed in claim 3 delays frosting control method, which is characterized in that the preset condition includes:
The low pressure is greater than the second preset pressure value or the outdoor evaporator inlet temperature is greater than the second preset temperature value.
8. air-conditioning as claimed in claim 3 delays frosting control method, which is characterized in that the preset rate is 2Hz/s.
9. a kind of air-conditioning delays frosting control device, which is characterized in that be applied to an air conditioner (1), the air-conditioning delays frosting
Control device (6) includes:
Acquiring unit (7), for obtaining low pressure and outdoor evaporator inlet temperature every prefixed time interval；
Determination unit (8), for determining whether air conditioner (1) is tied according to the low pressure and outdoor evaporator inlet temperature that obtain
Frost；
Adjustment unit (9), it is preset for when the air conditioner (1) frosting, controlling compressor (4) and expansion valve (5) execution
Operation is to prevent frosting from aggravating.
10. a kind of air conditioner, which is characterized in that the air conditioner (1) includes:
Memory (3)；
Controller (2)；And
Air-conditioning delays frosting control device (6), and the air-conditioning delays frosting control device (6) to be installed on the memory (3) simultaneously
Including the software function module that one or more can be executed by the controller (2), the air-conditioning delays frosting control device (6)
Include:
Acquiring unit (7), for obtaining low pressure and outdoor evaporator inlet temperature every prefixed time interval；
Determination unit (8), for determining whether air conditioner (1) is tied according to the low pressure and outdoor evaporator inlet temperature that obtain
Frost；
Adjustment unit (9), it is preset for when the air conditioner (1) frosting, controlling compressor (4) and expansion valve (5) execution
Operation is to prevent frosting from aggravating.
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| CN201810950612.5A CN109114748A (en) | 2018-08-20 | 2018-08-20 | A kind of air-conditioning delays frosting control method, device and air conditioner |
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| CN201810950612.5A CN109114748A (en) | 2018-08-20 | 2018-08-20 | A kind of air-conditioning delays frosting control method, device and air conditioner |
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Application publication date: 20190101 |