CN106016628B - The method and device of air conditioner defrosting control - Google Patents
The method and device of air conditioner defrosting control Download PDFInfo
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- CN106016628B CN106016628B CN201610509652.7A CN201610509652A CN106016628B CN 106016628 B CN106016628 B CN 106016628B CN 201610509652 A CN201610509652 A CN 201610509652A CN 106016628 B CN106016628 B CN 106016628B
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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
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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
- F24F2110/00—Control inputs relating to air properties
-
- 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
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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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of method and devices of air conditioner defrosting control.Wherein, it the described method comprises the following steps: detecting and obtain outdoor environment temperature；Detect and obtain the first line temperature of outdoor heat exchanger；Judge whether the outdoor environment temperature is more than or equal to default outdoor environment temperature, when the outdoor environment temperature is more than or equal to the default outdoor environment temperature, continue to judge whether first line temperature is greater than the first default line temperature, and when first line temperature is less than or equal to the first default line temperature, increase flow of the refrigerant between the outdoor heat exchanger and indoor heat exchanger in air conditioner, defrost is carried out to the outdoor heat exchanger of the air conditioner.Which reduce the number for entering four-way valve commutation defrosting mode, make to continue heating temperature range expansion, it is energy saving.
Description
Technical field
The present invention relates to air-conditioning technical field more particularly to a kind of method and devices of air conditioner defrosting control.
Background technique
For heat pump air conditioner in heating operation, outdoor heat exchanger passes through outdoor evaporator and room as evaporator, refrigerant
Heat exchange occurs for outer air, and heat is absorbed from outdoor air.Again through compressor after the evaporation of the refrigerant of outdoor evaporator
After compression, the refrigerant vapour of high temperature and pressure is formed, enters indoor heat exchanger, indoor heat exchanger makes as condenser at this time
With refrigerant is cooling in condenser, heat is discharged, to play the effect for promoting room temperature.
But since the outdoor heat-exchange temperature used as evaporator is lower, the vapor in surrounding air can be condensed into
Frost is attached to outdoor heat exchanger surface.In order to guarantee the heat transfer effect of outdoor heat exchanger, need to condense outdoor heat exchanger surface
Frost carry out (defrost) processing.
In traditional technology, in order to handle the frost of the condensation on outdoor heat exchanger, the general side for using timing defrost
Formula defrosts.Its tube temperature for acquiring outdoor heat exchanger and the duration of air conditioner heat-production operation, reach setting duration, and outdoor
Heat exchanger reaches set temperature point, then controls air-conditioning and be all connected with compressor, outdoor heat exchanger and indoor heat exchanger, control refrigeration
The four-way valve of agent circulating path turns to, and so that air conditioner is carried out refrigeration and enters defrost pattern.This method can be to air conditioner chamber outside
The condensation frost of heat exchanger outer surface is effectively handled, but it needs defrost of frequently freezing in air conditioner heat-production mode,
To influence the heating capacity of air conditioner, certain energy waste is caused.
Summary of the invention
Based on this, it is necessary to which, in traditional technology, air conditioner frequently enters defrost pattern, shadow when operating in heating mode
The problem of ringing air-conditioning heating amount provides a kind of air conditioner that can be reduced air conditioner and enter four-way valve commutation defrost number of run
The method and device of frost control.
The method for a kind of air conditioner defrosting control that purpose provides to realize the present invention, for operating in heating when air conditioner
When mode, defrost processing is carried out to the outdoor heat exchanger of air conditioner, the described method comprises the following steps:
It detects and obtains outdoor environment temperature；
Detect and obtain the first line temperature of outdoor heat exchanger；
Judge whether the outdoor environment temperature is more than or equal to default outdoor environment temperature；
According to described when the outdoor environment temperature is more than or equal to the default outdoor environment temperature, continue to judge
Whether first line temperature is greater than the first default line temperature；
When first line temperature is less than or equal to the first default line temperature, increases and freeze in air conditioner
Flow of the agent between the outdoor heat exchanger and indoor heat exchanger carries out defrost to the outdoor heat exchanger of the air conditioner；And
The first default line temperature is less than the default outdoor environment temperature.
In one of the embodiments, in the increase air conditioner refrigerant in the outdoor heat exchanger and indoor heat exchanger
Between flow, defrost is carried out to the outdoor heat exchanger of the air conditioner, comprising the following steps:
Increase the aperture for the throttle valve connecting with the outdoor heat exchanger, the system in outdoor heat exchanger to increase air conditioner
The flow of cryogen, and obtain the current aperture of the throttle valve；
Detect and obtain the second line temperature of outdoor heat exchanger；
Judge whether second line temperature is more than or equal to the second default line temperature；
When second line temperature is more than or equal to the second default line temperature, control air conditioner is throttling
The aperture of valve is to run preset duration under the current aperture；
Reduce the aperture of throttle valve that connect with the outdoor heat exchanger to initial opening；The initial opening is for the first time
The aperture of aperture regulation foregoing description throttle valve is carried out to the throttle valve；
When second line temperature is less than the second default line temperature, the increase and the room are executed again
The step of aperture of the throttle valve of external heat exchanger connection, new current aperture is obtained, and continues to execute the detection and obtain room
The step of second line temperature of external heat exchanger；And
The second default line temperature is greater than the described first default line temperature, and the default outdoor environment temperature is greater than
The second default line temperature.
The method also includes following steps in one of the embodiments:
When the outdoor environment temperature is less than the default outdoor environment temperature, the air conditioner is controlled according to commutationization
White mode carries out defrost；
When the air conditioner carries out defrost according to commutation defrost pattern, when needing defrost, connect in air conditioner with compressor
The four-way valve commutation connect makes air conditioner enter refrigerating state defrost
The method also includes following steps in one of the embodiments:
When the first line temperature of the outdoor heat exchanger is greater than the first default line temperature, the air-conditioning is controlled
Device continues to run in a heating mode.
The default outdoor environment temperature is between 1 DEG C~10 DEG C, the first default pipe in one of the embodiments,
Road temperature between -2 DEG C~5 DEG C, the second default line temperature is between 0 DEG C~5 DEG C；
The preset duration is between 30s~720s.
The outdoor environment temperature is by being arranged at the position of the outdoor heat exchanger windward side in one of the embodiments,
Temperature sensing package obtain；And the temperature sensing package is rack-mount, the bracket is mounted on outdoor heat exchanger windward side position
Place has pre-determined distance between the temperature sensing package and the pipeline of the outdoor heat exchanger.
The device of a kind of air conditioner defrosting control based on the same inventive concept, for operating in heating mode when air conditioner
When, defrost processing is carried out to the outdoor heat exchanger of air conditioner, described device includes:
Outdoor environment temperature obtains module, for detecting and obtaining outdoor environment temperature；
Line temperature obtains module, for detecting and obtaining the first line temperature of outdoor heat exchanger；
First judgment module, for judging whether the outdoor environment temperature is more than or equal to default outdoor environment temperature
Degree；
Second judgment module, for being more than or equal to the default outdoor environment temperature when the outdoor environment temperature
When, continue to judge whether first line temperature is greater than the first default line temperature；
First execution module, for being less than or equal to the described first default line temperature when first line temperature
When, increase flow of the refrigerant between the outdoor heat exchanger and indoor heat exchanger in air conditioner, to the room of the air conditioner
External heat exchanger carries out defrost；And
The first default line temperature is less than the default outdoor environment temperature.
First execution module includes: in one of the embodiments,
First throttle valve aperture regulation submodule, for increasing the aperture for the throttle valve connecting with the outdoor heat exchanger,
The flow of the refrigerant in outdoor heat exchanger to increase air conditioner, and obtain the current aperture of the throttle valve；
Line temperature acquisition submodule, for detecting and obtaining the second line temperature of outdoor heat exchanger；
First judging submodule, for judging whether second line temperature is more than or equal to the second default pipeline temperature
Degree；
First implementation sub-module, for being more than or equal to the described second default line temperature when second line temperature
When, control air conditioner runs preset duration in the case where the aperture of throttle valve is the current aperture；
Second throttle adjusts submodule, for reducing the aperture for the throttle valve connecting with the outdoor heat exchanger to initially
Aperture；The initial opening is the aperture for carrying out aperture regulation foregoing description throttle valve to the throttle valve for the first time；
Second implementation sub-module is used for when second line temperature is less than the second default line temperature, again
The first throttle valve aperture regulation submodule is executed, new current aperture is obtained, and continues to execute the line temperature and obtains
Submodule；And
The second default line temperature is greater than the described first default line temperature, and the default outdoor environment temperature is greater than
The second default line temperature.
Described device in one of the embodiments, further include:
Second execution module, for controlling institute when the outdoor environment temperature is less than the default outdoor environment temperature
It states air conditioner and carries out defrost according to commutation defrost pattern；
When the air conditioner carries out defrost according to commutation defrost pattern, when needing defrost, connect in air conditioner with compressor
The four-way valve commutation connect makes air conditioner enter refrigerating state defrost commutation defrost pattern.
Described device in one of the embodiments, further include:
Third execution module is greater than the described first default pipeline temperature for the first line temperature when the outdoor heat exchanger
When spending, controls the air conditioner and continue to run in a heating mode.
The beneficial effect comprise that a kind of method of air conditioner defrosting control provided by the invention, detects and obtains
The first line temperature of outdoor environment temperature and outdoor heat exchanger is taken, and when outdoor environment temperature is more than or equal to default outdoor
The line temperature of environment temperature and outdoor heat exchanger, which is less than or equal to use when the first default line temperature, to be adjusted in outdoor heat exchanger
The mode of refrigerant flow carries out defrost processing to outdoor heat exchanger, is different from directlying adopt in traditional technology and compressor company
The defrosting method of the four-way valve commutation connect, in the defrost mode for the condition that meets, air conditioner is still run in a heating mode, is made
Persistently heating temperature range expands, and the refrigeration defrost that four-way valve commutates in traditional technology is avoided to influence the heating capacity of air conditioner, section
The about energy.
Detailed description of the invention
Fig. 1 is the flow chart of the method for the air conditioner defrosting control of an embodiment；
Fig. 2 is the flow chart of the method for the air conditioner defrosting control of another embodiment；
Fig. 3 is the execution flow chart of step S500 in the method for the air conditioner defrosting control of an embodiment；
Fig. 4 is the composition schematic diagram of the device of the defrosting control of the air conditioner of an embodiment；
Fig. 5 is the composition schematic diagram of the first execution module 500 in the device of the defrosting control of the air conditioner of an embodiment；
Fig. 6 is the composition schematic diagram of the device of the defrosting control of the air conditioner of another embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to of the invention
The specific embodiment of the method and device of air-conditioning defrosting control is illustrated.It should be appreciated that specific implementation described herein
Example is only used to explain the present invention, is not intended to limit the present invention.
The method and device of air conditioner defrosting control of the invention is used for when operation of air conditioner is in heating mode, to air conditioner
Outdoor heat exchanger carry out defrost processing, to guarantee the heating effect of air conditioner.
As shown in Figure 1, the method for the air conditioner defrosting control of one of embodiment, comprising the following steps:
S100 is detected and is obtained outdoor environment temperature.
Wherein, the temperature sensing package that the outdoor environment temperature can be arranged on air-conditioner outdoor unit by temperature sensing package is examined
It surveys.It as an embodiment, can be in the outdoor heat exchanger windward side mounting bracket in air-conditioner outdoor unit, and on bracket
Installation environment temperature sensing package detects outdoor environment temperature.Therefore, the outdoor environment temperature detected in this step is mainly used for air-conditioning
Therefore the temperature sensing package of outdoor environment temperature is mounted on outdoor in the present embodiment by the judgement of the frosting situation of device outdoor heat exchanger
It is closer that the windward side of heat exchanger is associated with the outdoor environment temperature detected with the frosting situation of outdoor heat exchanger, so as to
More accurately judge the frosting situation of outdoor heat exchanger.
In addition, it should also be noted that, the temperature sensing package that will test outdoor environment temperature to be avoided to be installed to the angle of outdoor unit
In falling.
As an embodiment, the thermistor of 15K Ω can be used to detect the outdoor environment temperature.
S200 detects and obtains the first line temperature of outdoor heat exchanger.
" first " herein should not be understood as indicating or implying relative importance only as use is distinguished.
And the measurement of the line temperature of outdoor heat exchanger can also be realized by thermistor temperature sensing package.Such as it is used as one
Kind of embodiment, can on the Tube Sheet of Heat Exchanger road of outdoor heat exchanger soldering sleeve, and in the temperature-sensitive of the total grafting 20K Ω of casing electricity
Resistance sense thermometer bulb detects the first line temperature of the outdoor heat exchanger.In the present embodiment, thermistor is plugged into energy in casing
Enough guarantee that the pipeline of temperature sensing package and outdoor heat exchanger is in close contact, the line temperature detection of outdoor heat exchanger is more accurate.
It should also be noted that, both detections of the first line temperature of the detection and outdoor heat exchanger of outdoor environment temperature
Between the temperature that both does not have a context, and preferably obtain simultaneously, so as to according to the outdoor environment temperature currently obtained with
The first line temperature judgement of the outdoor heat exchanger currently obtained is using which kind of mode to the outdoor heat exchanger of air conditioner
Frost processing.
S300, judges whether outdoor environment temperature is more than or equal to default outdoor environment temperature.And sentenced according to different
Disconnected result executes step S400 or step S500 respectively.
S400 continues to judge the first pipeline temperature when outdoor environment temperature is more than or equal to default outdoor environment temperature
Whether degree is greater than the first default line temperature, and obtains the second judging result.
S500 increases refrigerant in air conditioner when the first line temperature is less than or equal to the first default line temperature
Flow between outdoor heat exchanger and indoor heat exchanger carries out defrost to the outdoor heat exchanger of air conditioner.
In above-described embodiment, the first default line temperature is less than default outdoor environment temperature.
In the present embodiment, when outdoor environment temperature is more than or equal to the pipe of default outdoor environment temperature and outdoor heat exchanger
Outdoor is changed by the way of refrigerant flow in adjusting outdoor heat exchanger when road temperature is less than or equal to the first default line temperature
Hot device carries out defrost processing.It is different from the defrost side that the four-way valve commutation connecting with compressor is directlyed adopt in traditional technology
Method.In the method for the present embodiment, in the defrost mode for the condition that meets, air conditioner is still run in a heating mode, makes to continue
It heats temperature range to expand, the thermal comfort of air conditioner is good.On the other hand, when meeting condition using adjusting refrigerant flow rate
Mode, which carries out defrost, reduces the number into four-way valve commutation defrost systemic circulation, energy saving.
As shown in Fig. 2, as an embodiment, it is further comprising the steps of:
S400 ', when outdoor environment temperature is less than default outdoor environment temperature, control air conditioner is according to commutation defrost pattern
Carry out defrost.
Wherein, the air conditioner according to commutation defrost pattern carry out defrost when, when needing defrost, in air conditioner with compression
The four-way valve commutation of machine connection makes air conditioner enter refrigerating state defrost.
It should be noted that it includes normal heating operation that air conditioner, which carries out defrost according to commutation defrost pattern, in this step
And defrost operation.In this step, as an embodiment, air conditioner can acquire the line temperature and system of outdoor heat exchanger
Hot runing time directlys adopt the mode of four-way valve commutation when arrival setting time, and when line temperature arrival set temperature point
Defrosting processing is carried out to the outdoor heat exchanger of air conditioner.Certainly it can also be handled to impose a condition according to other defrosts and be changed using four-way valve
To mode defrosting processing is carried out to the outdoor heat exchanger of air conditioner.
In addition, include thing steps that following S500 '.
S500 ', when the first line temperature of outdoor heat exchanger is greater than the first default line temperature, control air conditioner is being made
It is continued to run under heat pattern.
In the present embodiment, when outdoor environment temperature is more than or equal to default outdoor environment temperature, and the first of outdoor heat exchanger
When line temperature is greater than the first default line temperature, control air conditioner continues to run in a heating mode, i.e., when outdoor environment temperature
When degree is more than or equal to default environment temperature and the first line temperature greater than the first default line temperature, outdoor heat exchanger is not used
Any type of defrost processing, in fact, when meeting both of the aforesaid condition, on outdoor heat exchanger will not frosting therefore use
After the method for the air conditioner defrosting control of the present embodiment, the condition without defrost can be accurately detected, and control under this condition
Air conditioner processed operates normally in a heating mode, so that the section that air conditioner persistently heats have also been enlarged, reduces air conditioner four
The conversion times of port valve commutation defrost operation, it is energy saving.
Certainly, in other embodiments, the described first default pipeline is greater than for the first line temperature of outdoor heat exchanger
When temperature, the outdoor heat exchanger progress defrost for adjusting the mode of refrigerant flow in outdoor heat exchanger to air-conditioning can also be directlyed adopt
Processing.I.e. when the first line temperature is greater than the first default line temperature, it can also be used and side identical in step S500
Method increases flow of the refrigerant between outdoor heat exchanger and indoor heat exchanger in air conditioner, to the outdoor heat exchanger of air conditioner
Carry out defrost.It will be recognized to those skilled in the art that when the first line temperature is greater than the first default line temperature, preferentially
The scheme operated normally in a heating mode using control air conditioner.The heating efficiency of air-conditioning is higher at this time.
Specifically, as shown in figure 3, refrigerant is in outdoor heat exchanger and indoor heat exchange in increase air conditioner in step S500
Flow between device carries out defrost to the outdoor heat exchanger of air conditioner, comprising the following steps:
S510, increases the aperture of throttle valve connecting with outdoor heat exchanger, in the outdoor heat exchanger to increase air conditioner
The flow of refrigerant, and obtain the current aperture of the throttle valve.
S520 detects and obtains the second line temperature of outdoor heat exchanger.
It should be noted that the second line temperature described in step S520 can be used and the first pipeline in previous embodiment
Temperature obtains identical mode and obtains.And in the present embodiment, as an embodiment, it can throttle in step S510 increase
It is spaced preset time after the aperture of valve to current aperture and executes step S520 again later.Being spaced the preset time can be to room
The time of pipeline one heating in external heat exchanger.The specific duration of the preset time can according to the specific performance of air conditioner with
And aperture regulation situation above-mentioned is set.It as an embodiment can the adjusting of setting procedure S510 throttle valve opening
After 10s, the second line temperature of step S520 detection outdoor heat exchanger is executed.
In addition, the adjusting for throttle valve opening, settable aperture regulation gradient, adjusting when defrost to throttle valve opening
, a gradient is improved according to each throttle valve opening of aperture regulation gradient, and the aperture of the higher throttle valve of gradient is bigger.
And the throttle valve refers to the adjustable electric expansion valve of aperture on the pipeline for being arranged in and being connected to outdoor heat exchanger.
S530, judges whether the second line temperature is more than or equal to the second default line temperature.
S540 controls air conditioner in throttle valve when the second line temperature is more than or equal to the second default line temperature
Aperture be current aperture under run preset duration.
In the present embodiment, the second default line temperature is greater than the first default line temperature, and default outdoor environment temperature is big
In the second default line temperature.
Specifically, as an embodiment, the second default line temperature can between 0 DEG C~5 DEG C value, first is pre-
If line temperature can between -2 DEG C~5 DEG C value, default outdoor environment temperature can between 1 DEG C~10 DEG C value, but
In one embodiment, need to meet the second default line temperature greater than the first default line temperature, and preset outdoor environment temperature
Greater than the condition of the second default line temperature.
As an embodiment, the preset duration can between 30s~720s value.
After air conditioner runs preset duration under current aperture, step S550 is continued to execute, reduces and connects with outdoor heat exchanger
The aperture of the throttle valve connect is to initial opening.
Wherein, the initial opening is the aperture for carrying out throttle valve before aperture regulation to throttle valve for the first time.This field
It is air conditioner when operating under normal heating mode that technical staff, which is understood that the initial opening also, is connected with outdoor heat exchanger
The aperture of the throttle valve connect.
In this implementation, it is air-conditioning that step S540 air conditioner, which runs preset duration in the case where the aperture of throttle valve is current aperture,
The defrost time of device, and step S550, the aperture for the throttle valve connecting with outdoor heat exchanger is adjusted to initial opening, then air-conditioning
Device terminates defrost, is again introduced into normal heating mode.
Correspondingly, when the second line temperature is less than the second default line temperature, it as an embodiment, can be again
The step of executing the aperture for increasing the throttle valve connecting with outdoor heat exchanger, obtains new current aperture, that is, continues to increase throttling
The aperture of valve increases the temperature of the pipeline of outdoor heat exchanger faster.And after the completion of aperture adjustment, preset time is waited
Afterwards, step S520 is continued to execute, detects and obtain the second line temperature of outdoor heat exchanger again.Until the second line temperature reaches
To the described second default line temperature.
And in the present embodiment, after executing step S540 to air conditioner progress defrost, aforementioned detection outdoor environment temperature is returned to
And the step of detecting the first line temperature of outdoor heat exchanger, into subsequent cycle.
In another embodiment, step S300, judges whether outdoor environment temperature is more than or equal to default outdoor environment
Temperature, priority level with higher, and be the process of a lasting detection judgement, as long as when detecting that outdoor environment temperature is small
When default outdoor environment temperature, then the mode for not using adjusting throttle valve carries out defrost, and air conditioner is according to commutation defrost mould
Formula carries out defrost.
In other embodiments, two throttle valve openings can also be only set, when normal heating throttle valve compared under small guide vane,
When defrost, throttle valve is under larger opening.At this point, can then continue when the second line temperature is less than the second default line temperature
The heating of outdoor heat exchanger pipeline is waited, specifically, second pipe an of outdoor heat exchanger can be carried out at interval of a waiting time
The detection of road temperature, and when the second line temperature reaches the second default line temperature, execute step S540.Certainly, in this reality
It applies and there is provision of a total waiting time in mode, when the total duration for waiting outdoor heat exchanger pipeline to heat up reaches total waiting
Duration, and when the second line temperature is also less than the second default line temperature, control air conditioner is according to commutation defrost pattern
Frost.
Based on the same inventive concept, a kind of device of air conditioner defrosting control is also provided, is solved the problems, such as due to this device
Principle is similar to a kind of aforementioned method of air conditioner defrosting control, and therefore, the implementation of the device can be according to aforementioned air conditioner
The specific steps of the method for frost control realize that overlaps will not be repeated.
As shown in figure 4, the device of the air conditioner defrosting control of one embodiment includes that outdoor environment temperature obtains module
100, line temperature obtains module 200, first judgment module 300, the second judgment module 400 and the first execution module 500.
Wherein, the outdoor environment temperature obtains module 100, for detecting and obtaining outdoor environment temperature.The pipeline
Temperature acquisition module 200, for detecting and obtaining the first line temperature of outdoor heat exchanger.The first judgment module 300 is used
In judging whether outdoor environment temperature is more than or equal to default outdoor environment temperature.Second judgment module 400, for working as
When outdoor environment temperature is more than or equal to default outdoor environment temperature, continue to judge whether the first line temperature is greater than first in advance
If line temperature.First execution module 500, for being less than or equal to the first default line temperature when the first line temperature
When, increase flow of the refrigerant between outdoor heat exchanger and indoor heat exchanger in air conditioner, to the outdoor heat exchanger of air conditioner
Carry out defrost.
And in the present embodiment, the first default line temperature is less than default outdoor environment temperature.
The device of the air conditioner defrosting control of the present embodiment, when outdoor environment temperature is more than or equal to default outdoor environment
It uses to adjust when the line temperature of temperature and outdoor heat exchanger is less than or equal to the first default line temperature and freeze in outdoor heat exchanger
The mode of agent flux carries out defrost processing to outdoor heat exchanger.It, which is different from directlying adopt in traditional technology, connect with compressor
The defrosting method of four-way valve commutation.In the method for the present embodiment, in the defrost mode for the condition that meets, air conditioner is still operated in
Under heating mode, make to continue heating temperature range expansion, the thermal comfort of air conditioner is good.On the other hand, it is adopted when meeting condition
Carrying out defrost with the mode of adjusting refrigerant flow rate reduces the number into four-way valve commutation defrost systemic circulation, energy saving.
As shown in figure 5, in the device of the air conditioner defrosting control of wherein one embodiment, the first execution module 500 packet
It includes first throttle valve aperture regulation submodule 510, line temperature acquisition submodule 520, the first judging submodule 530, first hold
Row submodule 540, second throttle adjust submodule 550 and the second implementation sub-module 560.
Wherein, the first throttle valve aperture regulation submodule 510, for increasing the throttle valve connecting with outdoor heat exchanger
Aperture, the flow of the refrigerant in outdoor heat exchanger to increase air conditioner, and obtain the current aperture of throttle valve.The pipe
Road temperature acquisition submodule 520, for detecting and obtaining the second line temperature of outdoor heat exchanger.First judging submodule
530, for judging whether the second line temperature is more than or equal to the second default line temperature.First implementation sub-module
540, for controlling air conditioner in the aperture of throttle valve when the second line temperature is more than or equal to the second default line temperature
To run preset duration under current aperture.The second throttle adjusts submodule 550, connect for reducing with outdoor heat exchanger
Throttle valve aperture to initial opening.Wherein, initial opening is for the first time to throttle valve before throttle valve progress aperture regulation
Aperture.Second implementation sub-module 560, for being held again when the second line temperature is less than the second default line temperature
Row first throttle valve aperture regulation submodule, obtains new current aperture, and continue to execute line temperature acquisition submodule.
And in the present embodiment, the second default line temperature is greater than the first default line temperature, and it is big to preset outdoor environment temperature
In the second default line temperature.
Specifically, as an embodiment, the second default line temperature can between 0 DEG C~5 DEG C value, first is pre-
If line temperature can between -2 DEG C~5 DEG C value, default outdoor environment temperature can between 1 DEG C~10 DEG C value, but
In one embodiment, need to meet the second default line temperature greater than the first default line temperature, and preset outdoor environment temperature
Greater than the condition of the second default line temperature.
As an embodiment, the preset duration can between 30s~720s value.
As shown in fig. 6, going out in the device of the air conditioner defrosting control of another embodiment comprising the room in previous embodiment
External environment temperature acquisition module 100, line temperature obtain module 200, first judgment module 300, the second judgment module 400 and the
One execution module outer 500, further includes the second execution module 400 ' and third execution module 500 '.
Wherein, second execution module 400 ', for controlling when outdoor environment temperature is less than default outdoor environment temperature
Air conditioner processed carries out defrost according to commutation defrost pattern.The third execution module 500 ', for working as the first of outdoor heat exchanger
When line temperature is greater than the first default line temperature, control air conditioner continues to run in a heating mode.
Specifically, the air conditioner according to commutation defrost pattern carry out defrost when, when needing defrost, in air conditioner with pressure
The four-way valve commutation of contracting machine connection makes air conditioner enter refrigerating state progress defrost.
In the present embodiment, when outdoor environment temperature is more than or equal to default outdoor environment temperature, and the first of outdoor heat exchanger
When line temperature is greater than the first default line temperature, control air conditioner continues to run in a heating mode, i.e., when outdoor environment temperature
When degree is more than or equal to default environment temperature and the first line temperature greater than the first default line temperature, outdoor heat exchanger is not used
Any type of defrost processing, in fact, when meeting both of the aforesaid condition, on outdoor heat exchanger will not frosting therefore use
After the method for the air conditioner defrosting control of the present embodiment, the condition without defrost can be accurately detected, and control under this condition
Air conditioner processed operates normally in a heating mode, so that the section that air conditioner persistently heats have also been enlarged, reduces air conditioner four
The conversion times of port valve commutation defrost operation, further save the energy.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of method of air conditioner defrosting control, for changing the outdoor of air conditioner when air conditioner operates in heating mode
Hot device carries out defrost processing, which is characterized in that the described method comprises the following steps:
It detects and obtains outdoor environment temperature；
Detect and obtain the first line temperature of outdoor heat exchanger；
Judge whether the outdoor environment temperature is more than or equal to default outdoor environment temperature；
When the outdoor environment temperature is more than or equal to the default outdoor environment temperature, continue to judge first pipeline
Whether temperature is greater than the first default line temperature；
When first line temperature is less than or equal to the first default line temperature, increases refrigerant in air conditioner and exist
Flow between the outdoor heat exchanger and indoor heat exchanger carries out defrost to the outdoor heat exchanger of the air conditioner；And
The first default line temperature is less than the default outdoor environment temperature.
2. the method according to claim 1, wherein refrigerant is in the outdoor heat exchange in the increase air conditioner
Flow between device and indoor heat exchanger carries out defrost to the outdoor heat exchanger of the air conditioner, comprising the following steps:
Increase the aperture for the throttle valve connecting with the outdoor heat exchanger, the refrigerant in outdoor heat exchanger to increase air conditioner
Flow, and obtain the current aperture of the throttle valve；
Detect and obtain the second line temperature of outdoor heat exchanger；
Judge whether second line temperature is more than or equal to the second default line temperature；
When second line temperature is more than or equal to the second default line temperature, air conditioner is controlled in throttle valve
Aperture is to run preset duration under the current aperture；
Reduce the aperture of throttle valve that connect with the outdoor heat exchanger to initial opening；The initial opening is for the first time to institute
State the aperture that throttle valve carries out aperture regulation foregoing description throttle valve；
When second line temperature is less than the second default line temperature, the increase is executed again and is changed with the outdoor
The step of aperture of the throttle valve of hot device connection, new current aperture is obtained, and continues to execute the detection and obtain outdoor and change
The step of second line temperature of hot device；And
The second default line temperature is greater than the described first default line temperature, and the default outdoor environment temperature is greater than described
Second default line temperature.
3. the method according to claim 1, wherein the method also includes following steps:
When the outdoor environment temperature is less than the default outdoor environment temperature, the air conditioner is controlled according to commutation defrost mould
Formula carries out defrost；
When the air conditioner carries out defrost according to commutation defrost pattern, when needing defrost, it is connect in air conditioner with compressor
Four-way valve commutation makes air conditioner enter refrigerating state defrost.
4. the method according to claim 1, wherein the method also includes following steps:
When the first line temperature of the outdoor heat exchanger is greater than the first default line temperature, controls the air conditioner and exist
It is continued to run under heating mode.
5. according to the method described in claim 2, it is characterized in that, the default outdoor environment temperature between 1 DEG C~10 DEG C,
The first default line temperature between -2 DEG C~5 DEG C, the second default line temperature is between 0 DEG C~5 DEG C；
The preset duration is between 30s~720s.
6. method according to any one of claims 1 to 5, which is characterized in that the outdoor environment temperature is existed by setting
Temperature sensing package at the position of the outdoor heat exchanger windward side obtains；And the temperature sensing package is rack-mount, the bracket installation
Have at the position of the outdoor heat exchanger windward side, between the temperature sensing package and the pipeline of the outdoor heat exchanger it is default away from
From.
7. a kind of device of air conditioner defrosting control, for changing the outdoor of air conditioner when air conditioner operates in heating mode
Hot device carries out defrost processing, which is characterized in that described device includes:
Outdoor environment temperature obtains module, for detecting and obtaining outdoor environment temperature；
Line temperature obtains module, for detecting and obtaining the first line temperature of outdoor heat exchanger；
First judgment module, for judging whether the outdoor environment temperature is more than or equal to default outdoor environment temperature；
Second judgment module is used for when the outdoor environment temperature is more than or equal to the default outdoor environment temperature, after
It is continuous to judge whether first line temperature is greater than the first default line temperature；
First execution module, for increasing when first line temperature is less than or equal to the first default line temperature
Flow of the refrigerant between the outdoor heat exchanger and indoor heat exchanger in big air conditioner, to the outdoor heat exchange of the air conditioner
Device carries out defrost；And
The first default line temperature is less than the default outdoor environment temperature.
8. device according to claim 7, which is characterized in that first execution module includes:
First throttle valve aperture regulation submodule, for increasing the aperture for the throttle valve connecting with the outdoor heat exchanger, to increase
The flow of refrigerant in the outdoor heat exchanger of big air conditioner, and obtain the current aperture of the throttle valve；
Line temperature acquisition submodule, for detecting and obtaining the second line temperature of outdoor heat exchanger；
First judging submodule, for judging whether second line temperature is more than or equal to the second default line temperature；
First implementation sub-module is used for when second line temperature is more than or equal to the second default line temperature,
Control air conditioner runs preset duration in the case where the aperture of throttle valve is the current aperture；
Second throttle adjusts submodule, for reducing the aperture of the throttle valve connecting with the outdoor heat exchanger to initially opening
Degree；The initial opening is the aperture for carrying out aperture regulation foregoing description throttle valve to the throttle valve for the first time；
Second implementation sub-module, for being executed again when second line temperature is less than the second default line temperature
The first throttle valve aperture regulation submodule obtains new current aperture, and continues to execute the line temperature and obtain submodule
Block；And
The second default line temperature is greater than the described first default line temperature, and the default outdoor environment temperature is greater than described
Second default line temperature.
9. device according to claim 7, which is characterized in that described device further include:
Second execution module, for controlling the sky when the outdoor environment temperature is less than the default outdoor environment temperature
Device is adjusted to carry out defrost according to commutation defrost pattern；
When the air conditioner carries out defrost according to commutation defrost pattern, when needing defrost, it is connect in air conditioner with compressor
Four-way valve commutation makes air conditioner enter refrigerating state defrost.
10. device according to claim 7, which is characterized in that described device further include:
Third execution module is greater than the described first default line temperature for the first line temperature when the outdoor heat exchanger
When, it controls the air conditioner and continues to run in a heating mode.
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| CN107166639B (en) * | 2017-05-10 | 2020-08-04 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method and control device and air conditioner |
| CN107036348A (en) * | 2017-05-17 | 2017-08-11 | 广东美的制冷设备有限公司 | Air conditioner, the defrosting control method of air conditioner and system |
| CN107726536A (en) * | 2017-06-22 | 2018-02-23 | 青岛海尔空调器有限总公司 | Air-conditioning and its outdoor machine frost eliminating method |
| CN108386980B (en) * | 2018-03-05 | 2020-06-02 | 奥克斯空调股份有限公司 | Air conditioner defrosting control method and device |
| CN108826582B (en) * | 2018-04-28 | 2020-11-10 | 四川长虹空调有限公司 | Low-temperature heating refrigerant flow matching control method and air conditioner |
| CN109163416B (en) * | 2018-08-13 | 2023-06-30 | 珠海格力电器股份有限公司 | Defrosting control method and device of equipment and equipment |
| CN109405184A (en) * | 2018-10-29 | 2019-03-01 | 宁波奥克斯电气股份有限公司 | A kind of air conditioner defrosting control method and air conditioner |
| CN109373514B (en) * | 2018-11-19 | 2021-07-23 | 青岛海尔空调电子有限公司 | Defrosting control method for outdoor unit of air conditioner |
| CN109668248B (en) * | 2018-12-27 | 2020-11-24 | 四川长虹空调有限公司 | Refrigerant flow control method and system |
| CN109737560B (en) * | 2019-01-17 | 2020-07-31 | 奥克斯空调股份有限公司 | Air conditioner defrosting control method and device and air conditioner |
| CN110410968A (en) * | 2019-07-04 | 2019-11-05 | 青岛海尔空调器有限总公司 | Air conditioner and its control method |
| CN110762755B (en) * | 2019-10-30 | 2021-09-28 | Tcl空调器(中山)有限公司 | Defrosting control device and control method of air conditioner |
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