CN108386960A - One kind not shutting down defrosting air-conditioning and do not shut down Defrost method - Google Patents
One kind not shutting down defrosting air-conditioning and do not shut down Defrost method Download PDFInfo
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- CN108386960A CN108386960A CN201810058534.8A CN201810058534A CN108386960A CN 108386960 A CN108386960 A CN 108386960A CN 201810058534 A CN201810058534 A CN 201810058534A CN 108386960 A CN108386960 A CN 108386960A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 53
- 238000010257 thawing Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000002045 lasting effect Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 abstract description 47
- 239000003507 refrigerant Substances 0.000 description 20
- 238000010586 diagram Methods 0.000 description 11
- 230000004907 flux Effects 0.000 description 9
- 230000000875 corresponding effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013475 authorization Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
Classifications
-
- 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
- F24F11/70—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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
Defrosting air-conditioning is not shut down the invention discloses one kind and does not shut down Defrost method, belongs to air-conditioning technical field.The air-conditioning includes：Outdoor heat exchanger；The compressor being connected to outdoor heat exchanger；One end is communicated with compressor, the indoor heat exchanger that the other end is connected to outdoor heat exchanger；It is connected on the first expansion valve between outdoor heat exchanger and indoor heat exchanger；One end is communicated between compressor and indoor heat exchanger, and the other end is communicated in the second expansion valve between outdoor heat exchanger and the first expansion valve.For air-conditioning in the present embodiment when being defrosted, still sustainable is user's heat supply.Even if continuous defrosting, it will not influence that interior is carried out to continue heat supply, meet the heating demand of user.
Description
Technical field
The present invention relates to air-conditioning technical fields, more particularly to a kind of not shut down defrosting air-conditioning and do not shut down Defrost method.
Background technology
In autumn and winter, outdoor temperature is relatively low, the severe cold areas such as the northern area of China and Northern Europe, in addition to using heating, wall
Outside the heating modes such as stove, more and more families start to use air conditioning and heating.But in refrigerant latitudes such as Northern Europe, air-conditioning opens heating
When outdoor unit easily frosting.It needs to shut down during air-conditioner defrosting, defrosting mode is switched to by heating mode, air-conditioning is in defrosting mould
When working in formula, stop, to indoor heating, after defrosting restoring to indoor heating.In the case of outdoor unit easily frosting,
Air-conditioning frequently enters defrosting mode, intermittent to indoor heating, cannot be satisfied the heating demand of user.
Invention content
Defrosting air-conditioning is not shut down an embodiment of the present invention provides one kind and does not shut down Defrost method.For the implementation to disclosure
There are one basic understandings for some aspects of example, and simple summary is shown below.The summarized section is not extensive overview, not yet
It is key/critical component to be determined or describes the protection domain of these embodiments.Its sole purpose is with simple form
Some concepts are presented, in this, as the preamble of following detailed description.
According to a first aspect of the embodiments of the present invention, it provides one kind and not shutting down defrosting air-conditioning, including：
Outdoor heat exchanger；
The compressor being connected to the outdoor heat exchanger；
One end is connected to the compressor, the indoor heat exchanger that the other end is connected to the outdoor heat exchanger；
It is connected on the first expansion valve between the outdoor heat exchanger and the indoor heat exchanger；
One end is communicated between the compressor and the indoor heat exchanger, the other end be communicated in the outdoor heat exchanger with
The second expansion valve between first expansion valve.
For air-conditioning in the present embodiment when being defrosted, still sustainable is user's heat supply.Even if continuous defrosting, will not shadow
It rings and interior is carried out to continue heat supply, meet the heating demand of user.
During defrosting, the second expansion valve is opened, and compressor output end exports the refrigerant of high temperature and pressure, high temperature and pressure
On the one hand refrigerant enters outdoor heat exchanger by the second expansion valve, heating defrosting is carried out to outdoor heat exchanger；High temperature and pressure it is cold
On the other hand matchmaker goes successively to indoor heat exchanger, cool down in heat exchanger liquidation exothermic reaction indoors, persistently to indoor heating, to reach
To the purpose for being continuously user's heat supply during defrosting.
Further include the first temperature sensing being arranged on the outer coil pipe of the outdoor heat exchanger in a kind of optional embodiment
Device；
First expansion valve is the first electric expansion valve, and second expansion valve is the second electric expansion valve；
The control terminal of first electric expansion valve and the control terminal of second electric expansion valve are jointly with described first
The output end of temperature sensor connects.
Further include the second temperature sensor being arranged on the indoor heat exchanger in a kind of optional embodiment, it is described
The output end of second temperature sensor is connect with another input terminal of second electric expansion valve.
According to a second aspect of the embodiments of the present invention, provide a kind of air-conditioning does not shut down Defrost method, and air-conditioning is above-mentioned sky
It adjusts, this method includes：
Obtain the external disk tube temperature angle value of outdoor heat exchanger；
Judge the external disk tube temperature angle value whether less than the first setting lower-limit temperature value；
If the external disk tube temperature angle value increases the opening value of the second expansion valve, subtracts less than the first setting lower-limit temperature value
The opening value of small first expansion valve.
In a kind of optional embodiment, if the external disk tube temperature angle value is also wrapped less than after the first desired temperature
It includes：
Obtain the external disk tube temperature angle value first duration lasting less than the first setting lower-limit temperature value；
Judge first duration whether more than the first setting time；
If first duration is more than the first setting time, increase the opening value of the second expansion valve, reduces first
The opening value of expansion valve.
In a kind of optional embodiment, the opening value for increasing by the second expansion valve reduces the opening value of the first expansion valve,
Specially：
Increase the opening value of the second expansion valve to the second setting maximum opening value, reduces the opening value of the first expansion valve to the
The minimum opening value of one setting.
In a kind of optional embodiment, the opening value for increasing by the second expansion valve reduces the opening value of the first expansion valve
Later, further include：
Obtain the external disk tube temperature angle value of outdoor heat exchanger；
Judge the external disk tube temperature angle value whether higher than the first setting ceiling temperature value；
If the external disk tube temperature angle value obtains the external disk tube temperature angle value higher than the higher than the first setting ceiling temperature value
The second lasting duration of one setting ceiling temperature value；
Judged for the second duration whether more than the second setting time；
If second duration is more than the second setting time, reduce the opening value of second expansion valve, increases
The opening value of first expansion valve.
In a kind of optional embodiment, the opening value for increasing by the second expansion valve, including：
The difference that the external disk tube temperature angle value sets lower-limit temperature value with described first is obtained, difference is bigger, and described second
The opening value of expansion valve is bigger.
In a kind of optional embodiment, the opening value for reducing the first expansion valve, including：
The difference that the external disk tube temperature angle value sets lower-limit temperature value with described first is obtained, difference is bigger, and described first
The opening value of expansion valve is smaller.
In a kind of optional embodiment, the opening value for reducing the first expansion valve, including：
The inner coil pipe temperature value of indoor heat exchanger is obtained, inner coil pipe set temperature when indoor heat exchanger normal work is obtained
Value reduces the aperture of first expansion valve according to the difference of the inner coil pipe temperature value and the inner coil pipe set temperature value
Value.
It should be understood that above general description and following detailed description is only exemplary and explanatory, not
It can the limitation present invention.
Description of the drawings
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the present invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is a kind of structural schematic diagram for not shutting down defrosting air-conditioning shown according to an exemplary embodiment；
Fig. 2 is a kind of flow diagram for not shutting down Defrost method shown according to an exemplary embodiment；
Fig. 3 is a kind of flow diagram for not shutting down Defrost method shown according to an exemplary embodiment；
Fig. 4 is a kind of flow diagram of the setting lower-limit temperature value of determination first shown according to an exemplary embodiment；
Fig. 5 is that a kind of flow switching to heating mode by defrosting mode shown according to an exemplary embodiment is illustrated
Figure；
Fig. 6 is a kind of flow diagram of the opening value of the second expansion valve of increase shown according to an exemplary embodiment；
Fig. 7 is a kind of flow diagram of the opening value of the first expansion valve of reduction shown according to an exemplary embodiment；
Fig. 8 is a kind of flow diagram of the opening value of the first expansion valve of increase shown according to an exemplary embodiment；
Fig. 9 is a kind of flow diagram of the opening value of the first expansion valve of adjustment shown according to an exemplary embodiment；
Figure 10 is a kind of flow diagram of the working frequency of increase compressor shown according to an exemplary embodiment；
Figure 11 is a kind of flow diagram of the working frequency of increase compressor shown according to an exemplary embodiment；
Figure 12 is a kind of flow diagram of the working frequency of increase compressor shown according to an exemplary embodiment；
Description of drawing identification：10, outdoor heat exchanger；20, compressor；30, indoor heat exchanger；40, the first expansion valve；50、
Second expansion valve.
Specific implementation mode
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Put into practice them.Embodiment only represents possible variation.Unless explicitly requested, otherwise individual components and functionality is optional, and
And the sequence of operation can change.The part of some embodiments and feature can be included in or replace other embodiments
Part and feature.The range of embodiment of the present invention includes the entire scope of claims and the institute of claims
There is obtainable equivalent.Herein, each embodiment can individually or generally be indicated that this is only with term " invention "
It is merely for convenience, and if in fact disclosing the invention more than one, be not meant to automatically limit the range of the application
For any single invention or inventive concept.Herein, relational terms such as first and second and the like are used only for one
Entity, which either operates to distinguish with another entity or operation, to be existed without requiring or implying between these entities or operation
Any 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 process, method or equipment including a series of elements include not only those elements, but also to include
Other elements that are not explicitly listed.Each embodiment herein is described by the way of progressive, and each embodiment stresses
Be all difference from other examples, just to refer each other for identical similar portion between each embodiment.For implementing
For structure, product etc. disclosed in example, since it is corresponding with part disclosed in embodiment, so fairly simple, the phase of description
Place is closed referring to method part illustration.
According to a first aspect of the embodiments of the present invention, one kind is provided and does not shut down defrosting air-conditioning, as shown in Figure 1, including：
Outdoor heat exchanger 10；
The compressor 20 being connected to outdoor heat exchanger 10；
One end is connected to compressor 20, the indoor heat exchanger 30 that the other end is connected to outdoor heat exchanger 10；
It is connected on the first expansion valve 40 between outdoor heat exchanger 10 and indoor heat exchanger 30；
One end is communicated between compressor 20 and indoor heat exchanger 30, and the other end is communicated in outdoor heat exchanger 10 and first swollen
The second expansion valve 50 between swollen valve 40.
For air-conditioning in the present embodiment when being defrosted, still sustainable is user's heat supply.Even if continuous defrosting, will not shadow
It rings and interior is carried out to continue heat supply, meet the heating demand of user.
During defrosting, the second expansion valve 50 is opened, and 20 output end of compressor exports the refrigerant of high temperature and pressure, and high temperature is high
On the one hand the refrigerant of pressure enters outdoor heat exchanger 10 by the second expansion valve 50, heating defrosting is carried out to outdoor heat exchanger 10；It is high
On the other hand the refrigerant of warm high pressure goes successively to indoor heat exchanger 30, cool down in heat exchanger 30 liquidation exothermic reaction indoors, persistently right
Indoor heating, to achieve the purpose that be continuously user's heat supply during defrosting.
The external disk tube temperature angle value of outdoor heat exchanger 10 is used for the foundation as the aperture for adjusting the second expansion valve 50, and first is swollen
The opening value of the opening value of swollen valve 40 and the second expansion valve 50 is negatively correlated.
The temperature of the outer coil pipe of outdoor heat exchanger 10 is lower, and the opening value of the second expansion valve 50 is bigger.Work as outdoor heat exchanger
After 10 outer coil pipe frosting, temperature is lower, and the heat that when defrosting needs is more.The opening value of second expansion valve 50 is bigger, by pressing
The flow that contracting machine 20 flows directly into the refrigerant of the high temperature and pressure of outdoor heat exchanger 10 is bigger, and the outer coil pipe of outdoor heat exchanger 10 obtains
Heat it is more, defrosting more easy to implement.
The opening value of the opening value of first expansion valve 40 and the second expansion valve 50 is negatively correlated.The opening value of second expansion valve 50
Bigger, the opening value of the first expansion valve 40 is smaller.In the case where the cold medium flux of 20 output end of compressor output is constant, second
The opening value of expansion valve 50 is bigger, and the refrigerant for flowing to indoor heat exchanger 30 is fewer, will if the opening value of the first expansion valve 40 is constant
Cause the pressure in indoor heat exchanger 30 to reduce, makes the refrigerant in indoor heat exchanger 30 can not be according to design level liquidation exothermic reaction；
The opening value of second expansion valve 50 is smaller, and the refrigerant for flowing to indoor heat exchanger 30 is more, if the opening value of the first expansion valve 40 subtracts
It is small, the pressure caused in indoor heat exchanger 30 is increased, still indoor heat exchanger 30 can be prevented from working according to design requirement.
20 output end of compressor output cold medium flux it is constant in the case of：If the opening value of the second expansion valve 50 increases, reduce the
The opening value of one expansion valve 40；If the opening value of the second expansion valve 50 reduces, increase the opening value of the first expansion valve 40.
Expansion valve includes heating power expansion valve and electric expansion valve；Optionally, the second expansion valve is the second heating power expansion valve, i.e.,
Second expansion valve is heating power expansion valve, for convenience of distinguishing, will be named as the second heating power as the heating power expansion valve of the second expansion valve
Expansion valve.The temperature sensing package of second heating power expansion valve is arranged on the outer coil pipe of outdoor heat exchanger, the external disk tube temperature of outdoor heat exchanger
Angle value determines the opening value of the second heating power expansion valve, i.e. the temperature of the outer coil pipe of outdoor heat exchanger is lower, the aperture of the second expansion valve
Value is bigger；The temperature of the outer coil pipe of outdoor heat exchanger is higher, and the opening value of the second expansion valve is smaller.
Further include the first temperature sensor being arranged outside outdoor heat exchanger on coil pipe in a kind of optional embodiment；
First expansion valve is the first electric expansion valve, and the second expansion valve is the second electric expansion valve；
The control terminal of first electric expansion valve and the control terminal of the second electric expansion valve jointly with the first temperature sensor
Output end connects.
Corresponding with the second heating power expansion valve, the first electric expansion valve and the second electric expansion valve are electric expansion valve, electricity
Sub- expansion valve controls its aperture by the electronic signal of input.Compared to heating power expansion valve, the reaction of electric expansion valve is sensitiveer,
More accurately cold medium flux is controlled.Second electric expansion valve from indoor heat exchanger more accurately to flowing to outdoor heat exchanger
Cold medium flux controlled, not only ensured that outdoor heat exchanger obtains suitable heat and removed, but also not wasted heat；First electronics
Expansion valve more accurately controls the cold medium flux that outdoor heat exchanger is flowed to from indoor heat exchanger, it is ensured that indoor heat exchanger exists
It is worked normally under normal pressure.Electric expansion valve in the present embodiment includes electromagnetic-type electronic expansion valve and electrodynamic type electronic expansion
Valve, wherein electromotive force formula electric expansion valve further includes direct acting type electric expansion valve and deceleration type electric expansion valve.
The first temperature sensor in the present embodiment, the external disk tube temperature angle value for measuring outdoor heat exchanger, and by external disk
Tube temperature angle value simultaneous transmission is to the first electric expansion valve and the second electric expansion valve.If the external disk tube temperature angle value of outdoor heat exchanger drops
Low, then the opening value of the second electric expansion valve increases, and the opening value of the first electric expansion valve reduces；If outdoor heat exchanger coil pipe temperature
Angle value increases, then the opening value of the second electric expansion valve reduces, and the opening value of the first electric expansion valve increases.Wherein the first electronics
The opening value of the opening value of expansion valve and the second electric expansion valve is carried out at the same time change, can accelerate the first electric expansion valve
Reaction speed is in time adjusted the pressure of indoor heat exchanger, during defrosting, it is ensured that indoor heat exchanger works normally.
Further include second temperature sensor of the setting indoors on heat exchanger, second temperature in a kind of optional embodiment
The output end of sensor is connect with another input terminal of the second electric expansion valve.
The actual temperature value of indoor heat exchanger can react whether indoor heat exchanger is in normal operating conditions, the present embodiment
In, second temperature sensor is used to detect the actual temperature value of indoor heat exchanger, compared to the outer coil pipe according to outdoor heat exchanger
Temperature value controls the aperture of the second expansion valve by pre-defined algorithm, and the present embodiment is preferably the actual temperature according to indoor heat exchanger
The aperture of value the second expansion valve of control, can more directly ensure indoor heat exchanger steady operation under design environment.
According to a second aspect of the embodiments of the present invention, provide a kind of air-conditioning does not shut down Defrost method, wherein air-conditioning is upper
Air-conditioning is stated, this method includes：
Obtain the external disk tube temperature angle value of outdoor heat exchanger；
Judge external disk tube temperature angle value whether less than the first setting lower-limit temperature value；
If external disk tube temperature angle value increases the opening value of the second expansion valve less than the first setting lower-limit temperature value, reduce the
The opening value of one expansion valve.
Defrost method in the present embodiment can guarantee air-conditioning during defrosting, and still continual is indoor heating, into
Even and if be continuously indoor heating if guarantee under the operating mode continuously to defrost, there is the ability of indoor heating of being continuously, meet and use
The heating demand at family.
Optionally, external disk tube temperature angle value is obtained by temperature sensor measurement.External disk tube temperature angle value is practical accurate at this time
Value.
Optionally, external disk tube temperature angle value is obtained by the temperature sensing package of heating power expansion valve.External disk tube temperature angle value is fuzzy at this time
Estimated value.
Defrost method in the present embodiment is suitable for the defrosting mode of air-conditioning.Wherein, judge what whether air-conditioning needed to defrost
Condition is：Whether external disk tube temperature angle value is less than the first setting lower-limit temperature value.If external disk tube temperature angle value is less than the first setting lower limit
Temperature value, then air-conditioning enter defrosting mode：Increase the aperture of the second expansion valve, reduces the aperture of the first expansion valve；If outer coil pipe
Temperature value continues to run with normal heating mode not less than the first authorization lower-limit temperature value, then air-conditioning.
During defrosting, the second expansion valve is opened, and compressor output end exports the refrigerant of high temperature and pressure, high temperature and pressure
On the one hand refrigerant enters outdoor heat exchanger by the second expansion valve, heating defrosting is carried out to outdoor heat exchanger；High temperature and pressure it is cold
On the other hand matchmaker continues into indoor heat exchanger, cool down in heat exchanger liquidation exothermic reaction indoors, persistently to indoor heating, to reach
To the purpose for being continuously user's heat supply during defrosting.
The flow of the present embodiment is as shown in Figure 2：
S201, the external disk tube temperature angle value for obtaining outdoor heat exchanger；
S202, judge external disk tube temperature angle value whether less than the first setting lower-limit temperature value：If so then execute step S203；It is no
Then follow the steps S201；
S203, the opening value for increasing by the second expansion valve reduce the opening value of the first expansion valve；
In a kind of optional embodiment, if external disk tube temperature angle value further includes less than after the first desired temperature：
Obtain external disk tube temperature angle value first duration lasting less than the first setting lower-limit temperature value；
Judged for the first duration whether more than the first setting time；
If the first duration was more than the first setting time, increase the opening value of the second expansion valve, reduces the first expansion
The opening value of valve.
The specific implementation mode of the present embodiment is as shown in Figure 3：
S301, the external disk tube temperature angle value for obtaining outdoor heat exchanger；
S302, judge external disk tube temperature angle value whether less than the first setting lower-limit temperature value：If so then execute step S303；It is no
Then follow the steps S301；
S303, external disk tube temperature angle value first duration lasting less than the first setting lower-limit temperature value is obtained；
S304, judged for the first duration whether more than the first setting time：If so, thening follow the steps S305；Otherwise it holds
Row step S303；
S305, the opening value for increasing by the second expansion valve reduce the opening value of the first expansion valve.
The first duration in step S303 can be obtained by timer, which can be independent timer, can be
Chip is from the timer in tape timer, such as microcontroller.After the first duration being more than the first setting time, the first expansion
Valve and the second expansion valve just act, and show that the action of the first expansion valve and the second expansion valve lags behind external disk tube temperature angle value less than the
The state of one setting lower-limit temperature value.Optionally, the first expansion valve in the present embodiment is the first electric expansion valve, the second expansion
Valve is the second electric expansion valve.The timer for obtaining for the first duration is chosen as the electronic expansion of the first electric expansion valve/second
Timer in valve inside chip；The timer being chosen as in the control chip of air-conditioning；It is chosen as independent timer.This field skill
Art personnel are according to the installation timer of timer knowledge-chosen, to achieve the purpose that timing.
When using chip from tape timer as the timer for obtaining for the first duration, corresponding selection is passed by temperature
Sensor measures the external disk tube temperature angle value of outdoor heat exchanger.For convenience of differentiation, which is referred to as the first temperature sensor.The
One temperature sensor is arranged on the outer coil pipe of outdoor heat exchanger, and the input terminal of output end and the chip for carrying timer connects
It connects, the outdoor heat exchanger temperature value of measurement is transferred to the chip for carrying timer by the first temperature sensor, which judges outer
Whether coil temperature value is less than the first setting lower-limit temperature value, if then starting the first duration of corresponding timer record,
Otherwise persistently judge whether external disk tube temperature angle value is the first setting lower-limit temperature value；Whether the chip also judged for the first duration
More than the first setting time, if then controlling the aperture for increasing by the second expansion valve, reduce the aperture of the first expansion valve；Otherwise continue
Judged for the first duration whether more than the first setting time.
The first setting lower-limit temperature value in step S303, refers to the frosting temperature value of air-conditioning territory of use, if extraneous
Environment temperature is higher than the first setting lower-limit temperature value, then the vapor in air will not frosting；If ambient temperature is higher than the
One setting lower-limit temperature value, then the vapor in air can frosting.
The method for obtaining the first setting lower-limit temperature value is chosen as consulting the climatic data of air-conditioning territory of use；It is chosen as leading to
The method for crossing experiment obtains the first setting lower-limit temperature value of air-conditioning territory of use.
Preferably, it before judging for the first duration whether more than the first setting time, i.e. before step S304, also wraps
It includes：Determine the first setting lower-limit temperature value；
Wherein it is determined that the first setting lower-limit temperature value, specific as shown in Figure 4：
S401, obtain outdoor heat exchanger outer coil pipe surrounding air in absolute humidity values；
S402 is obtained using the absolute humidity as the temperature value of saturated humidity ratio；
Temperature value in step S402 is the first setting lower-limit temperature value.
For example, the absolute humidity in a certain area is 4.52g/m2, table look-up it is found that the saturated humidity ratio at -1 DEG C is
4.52g/m2, i.e., at -1 DEG C, absolute humidity values 4.52g/m2Correspond to rh value 100%.So, the first of this area
Lower-limit temperature value is set as -1 DEG C.
Wherein, to step：Determine that the first setting lower-limit temperature value and the sequencing of step S303 do not limit.
About the first setting time in step S304, in air-conditioning territory of use, when the outer coil temperature of outdoor heat exchanger
When value is less than the first setting lower-limit temperature value, the outer coil pipe of outdoor heat exchanger has the condition of frosting, starts frosting, outer coil pipe knot
After frost and the first setting time of accumulation, then external coil pipe defrosts.Air-conditioning be can avoid between defrosting mode and heating mode
Frequent switching.Optionally, the first setting time is 30min~60min.Preferably, the first setting time is 40min.
In a kind of optional embodiment, increase the opening value of the second expansion valve, reduces the opening value of the first expansion valve, specifically
For：
Increase the opening value of the second expansion valve to the second setting maximum opening value, reduces the aperture of the first expansion valve to first
The minimum opening value of setting.
Only there are two stable states for the opening value of the second expansion valve in the present embodiment：One state is the second expansion valve
Opening value is the second minimum opening value of setting, and optionally, second set minimum opening value as zero, i.e. the second expansion valve is in closing
State；Another state is that the opening value of the second expansion valve is the second setting maximum opening value.The opening value of first expansion valve is only
There are two stable states：One state is that the opening value of the first expansion valve is the first setting maximum opening value, another state is
The opening value of first expansion valve is the minimum opening value of the first setting.
In a heating mode, the opening value of the second expansion valve is the minimum opening value of the second setting, the aperture of the first expansion valve
Value is the first setting maximum opening value, ensures that indoor heat exchanger works under normal pressure, and optionally, the second setting minimum is opened
Angle value is zero；In defrost mode, the opening value of the second expansion valve is the second setting maximum opening value, the aperture of the first expansion valve
It is worth and sets minimum opening value for first, also ensure that indoor heat exchanger works under normal pressure, air-conditioning can defrosting simultaneously, hold
Continue for indoor heating.About the minimum opening value of the second setting, the second setting maximum opening value, the minimum opening value of the first setting and the
One setting maximum opening value, the present embodiment simultaneously limit its concrete numerical value.Ensure the opening value of the second expansion valve for the second setting most
Small guide vane value, in the case that the opening value of the first expansion valve is the first setting maximum opening value, indoor heat exchanger can work normally；
Alternatively, ensureing that the opening value of the second expansion valve is the second setting maximum opening value, the opening value of the first expansion valve is the first authorization
In the case of minimum opening value, indoor heat exchanger can work normally.
When second set minimum opening value as zero when, air-conditioning does not lose heat in a heating mode, and all refrigerants flow
To indoor heat exchanger, heating efficiency is improved.
The present embodiment is easily achieved, strong applicability, it is ensured that indoor heat exchanger is indoor heating under normal operating mode, no
Fragile indoor heat exchanger extends the service life of air-conditioning.
It is corresponding, by the condition following examples for the heating mode that defrosting mode switches to：
In a kind of optional embodiment, increase the aperture of the second expansion valve, after the aperture for reducing the first expansion valve, also wraps
Include flow as shown in Figure 5：
S501, the external disk tube temperature angle value for obtaining outdoor heat exchanger；
S502, judge whether external disk tube temperature angle value is higher than the first set temperature value；
If S503, external disk tube temperature angle value obtain external disk tube temperature angle value and are higher than first higher than the first setting ceiling temperature value
Set the second lasting duration of ceiling temperature value；
S504, judged for the second duration whether more than the second setting time；
If S505, the second duration are more than the second setting time, reduce the opening value of the second expansion valve, increases by first
The opening value of expansion valve.
In step S502, if external disk tube temperature angle value thens follow the steps S501 not higher than the first setting ceiling temperature value, after
It is continuous to obtain the external disk tube temperature angle value of outdoor heat exchanger, and continue to judge whether external disk tube temperature angle value is higher than the first set temperature value.
In step S504, if the second duration was no more than the second setting time, S503 is thened follow the steps, continues to obtain external disk tube temperature
Angle value second duration lasting higher than the first setting ceiling temperature value, and judged for the second duration whether more than second
Setting time.
When outdoor heat exchanger external disk tube temperature angle value is higher than the first setting ceiling temperature value, the frost on outer coil pipe melts, when
After second duration was more than the second setting time, the frost on outer coil pipe, which melts, to be finished, then reduces the opening value of the second expansion valve,
Reduce the cold medium flux of the outdoor heat exchanger flowed to by indoor heat exchanger, reduces the calorie value that outdoor heat exchanger is obtained.It is preferred that
, the first setting ceiling temperature value is more than the first setting lower-limit temperature value.I.e. first setting ceiling temperature value is more than the temperature of frosting
Angle value is conducive to the abundant fast melt of frost on outer coil pipe.
In a kind of optional embodiment, reduce the opening value of the second expansion valve, increases the opening value of the first expansion valve, specifically
For：
Reduce the opening value of the second expansion valve to zero, increases the opening value of the first expansion valve to the first setting maximum opening
Value.
In a kind of optional embodiment, increase the opening value of the second expansion valve, including：
The difference of external disk tube temperature angle value and the first setting lower-limit temperature value is obtained, difference is bigger, the aperture of the second expansion valve
Value is bigger.
In the present embodiment, the opening value of the second expansion valve is arranged according to actual environment situation, to the aperture of the second expansion valve
Value realizes Precise control.External disk tube temperature angle value and the difference of the first setting lower-limit temperature value are bigger, illustrate that the difficulty of defrosting is got over
Greatly, the required heat that defrosts is more.The opening value of second expansion valve is bigger, and the refrigerant of outdoor heat exchanger is flowed to from compressor
Flow is more, and the heat that outdoor heat exchanger obtains is more, and more smoothly external coil pipe defrosts.
Optionally, according to the difference of external disk tube temperature angle value and the first setting lower-limit temperature value, with proportional-integral-differential control
The opening value of the second expansion valve of device pair processed controls.The refrigerant that outdoor heat exchanger is flowed to from indoor heat exchanger can be accurately controlled
Flow realizes fining defrosting, neither wasted heat, and can thoroughly defrost.
In a kind of optional embodiment, reduce the opening value of the second expansion valve, including：
The difference of external disk tube temperature angle value and the first setting ceiling temperature value is obtained, difference is bigger, the aperture of the second expansion valve
It is worth smaller.
Optionally, according to the difference of external disk tube temperature angle value and the first setting ceiling temperature value, with proportional-integral-differential control
The opening value of the second expansion valve of device pair processed controls.
In a kind of optional embodiment, increase the opening value of the second expansion valve, as shown in Figure 6：
S601, the difference for obtaining external disk tube temperature angle value and the first setting lower-limit temperature value；
S602, the ambient temperature value for obtaining outdoor heat exchanger local environment；
S603, the difference and outdoor heat exchanger local environment that lower-limit temperature value is set with first according to external disk tube temperature angle value
Ambient temperature value adjusts the opening value of the second expansion valve.
The present embodiment includes following two embodiments：
(1) difference that a1, acquisition external disk tube temperature angle value set lower-limit temperature value with first；
A2, obtain outdoor heat exchanger local environment ambient temperature value and external disk tube temperature angle value difference；
The ring of a3, difference and outdoor heat exchanger local environment that lower-limit temperature value is set with first according to external disk tube temperature angle value
Border temperature value adjusts the opening value of the second expansion valve with the difference of external disk tube temperature angle value.
(2) difference that b1, acquisition external disk tube temperature angle value set lower-limit temperature value with first；
The difference of b2, the ambient temperature value for obtaining outdoor heat exchanger local environment and the first setting lower-limit temperature value；
The ring of b3, difference and outdoor heat exchanger local environment that lower-limit temperature value is set with first according to external disk tube temperature angle value
Border temperature value first sets the opening value of difference the second expansion valve of adjustment of lower-limit temperature value.
In step a3 or step b3, analyzed above how according to external disk tube temperature angle value and the first setting lower limit temperature
The difference of value adjusts the opening value of the second expansion valve, and details are not described herein again.
In step a3, if the ambient temperature value of outdoor heat exchanger local environment is higher than external disk tube temperature angle value, illustrate environment
Temperature value is helped to heat up with outer coil pipe, then reduces the opening value of the second expansion valve；If the environment temperature of outdoor heat exchanger local environment
Angle value is less than external disk tube temperature angle value, illustrates that ambient temperature value has the trend for making outer coil pipe cooling, then increases by the second expansion valve
Opening value.
In step b3, if the ambient temperature value of outdoor heat exchanger local environment is said higher than the first setting lower-limit temperature value
Bright ambient temperature value is helped to heat up with outer coil pipe, then reduces the opening value of the second expansion valve；If outdoor heat exchanger local environment
Ambient temperature value illustrates that ambient temperature value has the trend for making outer coil pipe cooling, then increases less than the first setting lower-limit temperature value
The opening value of second expansion valve.
When reducing the opening value of the second expansion valve, specific implementation mode and the opening value of the second expansion valve of this increase
Embodiment is similar, and those skilled in the art can do simply according to the embodiment of the opening value of second expansion valve of increase
Replacement, obtain reduce the second expansion valve opening value embodiment.
In terms of the influence to the opening value of the second expansion valve, the difference of external disk tube temperature angle value and the first setting lower-limit temperature value
The weight of value is more than residing for the ambient temperature value of outdoor heat exchanger local environment and difference/outdoor heat exchanger of external disk tube temperature angle value
The weight of the ambient temperature value of environment and the difference of the first setting lower-limit temperature value.
The present embodiment can be finer the second expansion valve of increase opening value, there is more thorough defrosting effect and more preferably
Energy-saving effect.
The opening value of the second expansion valve can be accurately controlled according to above-mentioned several embodiments.
After carrying out Precise control to the opening value of the second expansion valve, correspondingly, for the opening value of the first expansion valve：
In a kind of optional embodiment, reduce the opening value of the first expansion valve, including：
The difference of external disk tube temperature angle value and the first setting lower-limit temperature value is obtained, difference is bigger, the aperture of the first expansion valve
It is worth smaller.In the present embodiment, the opening value of variable based on the opening value of the first expansion valve and the second expansion valve of adjustment is adjusted
Based on variable it is identical.That is, when external disk tube temperature angle value changes, while adjusting the opening value and second of the first expansion valve
The opening value of expansion valve.It can guarantee that the refrigerant pressure in indoor heat exchanger will not be mutated, the sustainable stable work of indoor heat exchanger
Make.
Preferably, reduce the opening value of the first expansion valve, including：
The difference for obtaining external disk tube temperature angle value and the first setting lower-limit temperature value, according to the difference with proportional-integral-differential
The aperture of the first expansion valve of controller pair controls.
Optionally, increase the opening value of the first expansion valve, including：
The difference of external disk tube temperature angle value and the first setting ceiling temperature value is obtained, difference is bigger, the aperture of the first expansion valve
Value is bigger.
Preferably, increase the opening value of the first expansion valve, including：
The difference for obtaining external disk tube temperature angle value and the first setting ceiling temperature value, according to the difference with proportional-integral-differential
The aperture of the first expansion valve of controller pair controls.
It is controlled according to the opening value of the first expansion valve of above-mentioned two embodiment pair.
In a kind of optional embodiment, reduce the opening value of the first expansion valve, as shown in fig. 7, comprises：
S701, the inner coil pipe temperature value for obtaining indoor heat exchanger；
Inner coil pipe set temperature value when S702, acquisition indoor heat exchanger normal work；
S703, the opening value for reducing the first expansion valve according to the difference of inner coil pipe temperature value and inner coil pipe set temperature value.
When the present embodiment is that air-conditioning enters defrosting mode, the opening value of the opening value of the second expansion valve and the first expansion valve
Control method.Accordingly, during entering heating mode by defrosting mode for air-conditioning：
In a kind of optional embodiment, increase the opening value of the first expansion valve, as shown in figure 8, including：
S801, the inner coil pipe temperature value for obtaining indoor heat exchanger；
Inner coil pipe set temperature value when S802, acquisition indoor heat exchanger normal work；
S803, the opening value for increasing by the first expansion valve according to the difference of inner coil pipe temperature value and inner coil pipe set temperature value.
In above-mentioned two embodiment, Qian Zhewei：When air-conditioning enters defrosting mode by heating mode, the aperture of the first expansion valve
The control method of value；The latter is：When air-conditioning enters heating mode by defrosting mode, the controlling party of the opening value of the first expansion valve
Method.Flow in Fig. 7 and Fig. 8 can uniformly be summarised as flow as shown in Figure 9：
S901, the inner coil pipe temperature value for obtaining indoor heat exchanger；
Inner coil pipe set temperature value when S902, acquisition indoor heat exchanger normal work；
S903, the opening value that the first expansion valve is adjusted according to the difference of inner coil pipe temperature value and inner coil pipe set temperature value.
Inner coil pipe temperature value can directly reflect the working condition of indoor heat exchanger.The refrigerant interior liquefaction of heat exchanger indoors is put
Heat, when indoor heat exchanger is in normal work, refrigerant indoors the liquefaction amount in heat exchanger, thermal discharge be a certain range of,
The inner coil pipe temperature value for being directly reflected as indoor heat exchanger is a certain range of.According to the first expansion of inner coil pipe temperature value adjustment
The opening value of valve, more specific aim.
By taking proportional-integral derivative controller as an example, illustrate according to the first expansion of the situation of change of inner coil pipe temperature value adjustment
The opening value of valve：
Obtain inner coil pipe set temperature value when indoor heat exchanger normal work；
Using inner coil pipe set temperature value as the setting value of proportional-integral derivative controller；
Within output valve of the coil temperature value as proportional-integral derivative controller.
Such as inner coil pipe temperature value is less than inner coil pipe set temperature value, reduces the aperture of the first expansion valve, indoor heat exchanger
The liquefaction quantitative change of interior refrigerant is more, and thermal discharge becomes larger, and inner coil pipe temperature value gradually increases, until inner coil pipe temperature value is equal to inner coil pipe
Set temperature value.
Particularly, in a kind of optional embodiment, be applied to convertible frequency air-conditioner when, increase the second expansion valve opening value it
Afterwards, before the opening value for reducing the first expansion valve, further include：
Increase the working frequency of compressor.
As shown in Figure 10：
S1001, the opening value for increasing by the second expansion valve；
S1002, the working frequency for increasing compressor；
S1003, the opening value for reducing the first expansion valve.
By increasing the working frequency of compressor to increase the cold medium flux of compressor output in the present embodiment, compressor is defeated
The value added of the cold medium flux gone out is identical as the value added of the cold medium flux by the second expansion valve, to keep indoor heat exchanger
In refrigerant pressure it is constant, indoor heat exchanger can work normally.The excellent effect of the present embodiment in addition, air-conditioning in heating mode
It is identical to indoor heating effect in defrosting mode.The defrosting process of air-conditioning, it is that user persistently supplies not influence air-conditioning not only
Heat, does not influence the heating load that air-conditioning is user also, and indoor temperature will not be interfered because of the defrosting process of air-conditioning.
In a kind of preferred embodiment, increase the working frequency of compressor, including：
Obtain the inner coil pipe temperature value of indoor heat exchanger；
Obtain inner coil pipe set temperature value when indoor heat exchanger normal work；
Increase the working frequency of compressor according to the difference of inner coil pipe temperature value and inner coil pipe set temperature value.
As shown in figure 11：
S1101, the opening value for increasing by the second expansion valve；
S1102, the inner coil pipe temperature value for obtaining indoor heat exchanger；
Inner coil pipe set temperature value when S1103, acquisition indoor heat exchanger normal work；
S1104, the working frequency for increasing compressor according to the difference of inner coil pipe temperature value and inner coil pipe set temperature value；
S1105, the opening value for reducing the first expansion valve.
In step S1104, inner coil pipe temperature value and the difference of inner coil pipe set temperature value are bigger, compressor operating frequency
Value added is bigger；Inner coil pipe temperature value and the difference of inner coil pipe set temperature value are smaller, and the value added of compressor operating frequency is got over
It is small.The compressor operating frequency determined in the present embodiment can more directly ensure that indoor heat exchanger is in normal operating conditions.
In a kind of optional embodiment, after the working frequency for increasing compressor, reduce the opening value of the first expansion valve
Before, further include：
Obtain the inner coil pipe temperature value of indoor heat exchanger；
Judge whether indoor heat exchanger is in normal operating conditions；
If indoor heat exchanger is in normal operating conditions, reduce the opening value of the first expansion valve.
As shown in figure 12：
S1201, the opening value for increasing by the second expansion valve；
S1202, the inner coil pipe temperature value for obtaining indoor heat exchanger；
Inner coil pipe set temperature value when S1203, acquisition indoor heat exchanger normal work；
S1204, the working frequency for increasing compressor according to the difference of inner coil pipe temperature value and inner coil pipe set temperature value；
S1205, the inner coil pipe temperature value for obtaining indoor heat exchanger；
S1206, judge whether indoor heat exchanger is in normal operating conditions：If so then execute step S1207；Otherwise it executes
Step S1202；
S1207, the opening value for reducing the first expansion valve.
The present embodiment can fully ensure that indoor heat exchanger is in normal operating conditions, and air-conditioning defrosted for outdoor heat exchanger
Cheng Zhong, indoor heat exchanger are continually and steadily user's heat supply.
It should be understood that the invention is not limited in the flow and structure that are described above and are shown in the accompanying drawings,
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by the attached claims
System.
Claims (10)
1. one kind not shutting down defrosting air-conditioning, which is characterized in that including：
Outdoor heat exchanger；
The compressor being connected to the outdoor heat exchanger；
One end is connected to the compressor, the indoor heat exchanger that the other end is connected to the outdoor heat exchanger；
It is connected on the first expansion valve between the outdoor heat exchanger and the indoor heat exchanger；
One end is communicated between the compressor and the indoor heat exchanger, the other end be communicated in the outdoor heat exchanger with it is described
The second expansion valve between first expansion valve.
2. air-conditioning according to claim 1, which is characterized in that further include being arranged on the outer coil pipe of the outdoor heat exchanger
The first temperature sensor；
First expansion valve is the first electric expansion valve, and second expansion valve is the second electric expansion valve；
The control terminal of first electric expansion valve and the control terminal of second electric expansion valve jointly with first temperature
The output end of sensor connects.
3. air-conditioning according to claim 1, which is characterized in that further include the second temperature being arranged on the indoor heat exchanger
Sensor is spent, the output end of the second temperature sensor is connect with another input terminal of second electric expansion valve.
4. a kind of air-conditioning does not shut down Defrost method, the air-conditioning is the air-conditioning described in any one of claims 1 to 3, special
Sign is, including：
Obtain the external disk tube temperature angle value of outdoor heat exchanger；
Judge the external disk tube temperature angle value whether less than the first setting lower-limit temperature value；
If the external disk tube temperature angle value increases the opening value of the second expansion valve less than the first setting lower-limit temperature value, reduce the
The opening value of one expansion valve.
5. according to claim 4 do not shut down Defrost method, which is characterized in that if the external disk tube temperature angle value is less than
After first desired temperature, further include：
Obtain the external disk tube temperature angle value first duration lasting less than the first setting lower-limit temperature value；
Judge first duration whether more than the first setting time；
If first duration is more than the first setting time, increase the opening value of the second expansion valve, reduces the first expansion
The opening value of valve.
6. according to claim 4 or 5 do not shut down Defrost method, which is characterized in that described to increase opening for the second expansion valve
Angle value reduces the opening value of the first expansion valve, specially：
Increase the opening value of the second expansion valve to the second setting maximum opening value, reduces the opening value of the first expansion valve and set to first
Fixed minimum opening value.
7. according to claim 4 do not shut down Defrost method, which is characterized in that the aperture for increasing by the second expansion valve
It is worth, after the opening value for reducing the first expansion valve, further includes：
Obtain the external disk tube temperature angle value of outdoor heat exchanger；
Judge the external disk tube temperature angle value whether higher than the first setting ceiling temperature value；
If the external disk tube temperature angle value obtains the external disk tube temperature angle value and is set higher than first higher than the first setting ceiling temperature value
Determine the second lasting duration of ceiling temperature value；
Judged for the second duration whether more than the second setting time；
If second duration is more than the second setting time, reduce the opening value of second expansion valve, described in increase
The opening value of first expansion valve.
8. according to claim 4 do not shut down Defrost method, which is characterized in that the aperture for increasing by the second expansion valve
Value, including：
The difference that the external disk tube temperature angle value sets lower-limit temperature value with described first is obtained, difference is bigger, second expansion
The opening value of valve is bigger.
9. according to claim 8 do not shut down Defrost method, which is characterized in that the aperture for reducing the first expansion valve
Value, including：
The difference that the external disk tube temperature angle value sets lower-limit temperature value with described first is obtained, difference is bigger, first expansion
The opening value of valve is smaller.
10. according to claim 4 do not shut down Defrost method, which is characterized in that the aperture for reducing the first expansion valve
Value, including：
The inner coil pipe temperature value of indoor heat exchanger is obtained, inner coil pipe set temperature value when indoor heat exchanger normal work is obtained,
Reduce the opening value of first expansion valve according to the difference of the inner coil pipe temperature value and the inner coil pipe set temperature value.
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| CN109855234A (en) * | 2018-11-12 | 2019-06-07 | 青岛海尔空调器有限总公司 | Air conditioner and its heat-production control method |
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| CN110470002A (en) * | 2019-08-02 | 2019-11-19 | 青岛海尔空调器有限总公司 | Control method and device, air-conditioning for air-conditioner defrosting |
| CN110579014A (en) * | 2019-09-03 | 2019-12-17 | 青岛海信日立空调系统有限公司 | Heat exchange device and control method and control device thereof |
| CN110762754A (en) * | 2019-10-18 | 2020-02-07 | 宁波奥克斯电气股份有限公司 | Intelligent defrosting method and system for air conditioner and air conditioner |
| EP4249819A1 (en) * | 2022-03-21 | 2023-09-27 | Guangdong Carrier HVAC Co., Ltd. | An air conditioner defrosting method |
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