CN106247533A - Control device, control method and the air conditioning system of a kind of air conditioning system defrost - Google Patents
Control device, control method and the air conditioning system of a kind of air conditioning system defrost Download PDFInfo
- Publication number
- CN106247533A CN106247533A CN201610643523.7A CN201610643523A CN106247533A CN 106247533 A CN106247533 A CN 106247533A CN 201610643523 A CN201610643523 A CN 201610643523A CN 106247533 A CN106247533 A CN 106247533A
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- Prior art keywords
- defrost
- air conditioning
- conditioning system
- heat exchanger
- throttling arrangement
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
- 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
Abstract
The present invention provides control device, control method and the air conditioning system of a kind of air conditioning system defrost, wherein, air conditioning system includes compressor (1), indoor heat exchanger (2), outdoor heat exchanger (3) and throttling arrangement (4), wherein, described control device includes: judging unit, is used for judging the degree whether described outdoor heat exchanger (3) reaches to need defrost；Performance element, controls described throttling arrangement according to the judged result of judging unit and carries out action to carry out defrost when needs defrost.Use performance element regulation throttling arrangement so that defrost to be controlled by the present invention, eliminate original control carried out by cross valve commutation, indoor heat exchanger can be effectively prevented to be evaporated heat absorption when defrost and indoor environment temperature is reduced, improve the ambient temperature of indoor, avoid that temperature rise speed is relatively slow, reduce energy loss, reduce noise and abnormal sound, reduce power consumption, improve operational reliability, prevent the problems such as compressor oil starvation and insufficient lubrication.
Description
Technical field
The invention belongs to air-conditioning technical field, be specifically related to the control device of a kind of air conditioning system defrost, control method and
Air conditioning system.
Background technology
Air source heat pump system frosting defrost problem of the prior art is to affect air conditioner low temperature heating amount and heating effect
One of key technical problem, defrosting process is notable on impacts such as the heating performance of air-conditioning, noise, comfortableness, reliabilities.In room
External environment temperature is less than 5 DEG C, the easy frosting of air-conditioning, and performance decays rapidly, causes heat exchanger heating capacity to decline, and heating load is not enough.Existing
The commonly used reverse circulation of conventional air-conditioning is had to defrost, i.e. during defrosting, air conditioner refrigerating mode operation, the closedown of indoor and outdoor blower fan,
Vaporizer inner tube rapid drop in temperature is to less than-30 DEG C, and from the substantial amounts of heat of indoor absorption, in making room, temperature reduces rapidly 6
～8 DEG C, it being again started up needing the time of longer anti-cold wind, temperature rise speed is relatively slow, has a strong impact on user's comfort.Conventional
Defrosting compressor start-stop 4 times cross valve commutate 2 times, there is bigger noise fluctuation problem, open in the compressor short time simultaneously
Open oil Chamber for compressor of directly being scurried out by lubricating oil, be very easy to cause compressor oil starvation and insufficient lubrication problem.
Air source heat pump system of the prior art is again started up after there is defrost heating the longer anti-cold wind of needs
Time, temperature rise speed are relatively slow, have a strong impact on user's comfort, and compressor shutdown, cross valve commutation can bring energy frequently
Amount loss and integrity problem, and also can there is bigger noise fluctuation problem, easily cause compressor oil starvation and insufficient lubrication
Etc. technical problem, research design the most of the present invention goes out control device, control method and the air conditioning system of a kind of air conditioning system defrost.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to overcome air conditioning system defrost process comfort level of the prior art
Poor defect, thus control device, control method and the air conditioning system of a kind of air conditioning system defrost is provided.
The present invention provides the control device of a kind of air conditioning system defrost, wherein,
Air conditioning system includes compressor, indoor heat exchanger, outdoor heat exchanger and throttling arrangement, wherein, described control device
Including:
Judging unit, for judging whether described outdoor heat exchanger reaches to need the degree of defrost；
Performance element, controls described throttling arrangement according to the judged result of judging unit and carries out action with when needs defrost
Carry out defrost.
Preferably, also include detector unit, for detecting the running state parameter of described air conditioning system, and detection is tied
Fruit transmission is to judging unit；
Judging unit, by the described running state parameter detected compared with the conditional parameter entering defrost in control logic
Relatively, and then judge whether outdoor heat exchanger reaches to need the degree of defrost.
Preferably, if described running state parameter has reached the condition controlling to enter defrost in logic, then its needs are judged
Carry out defrost；
If described running state parameter not up to controls to enter in logic the condition of defrost, then judge its being not required to
Frost.
Preferably, described throttling arrangement is controlled by described performance element according to the judged result of judging unit:
When needs carry out defrost, control described throttling arrangement fully on or cancel throttling；
When being made without defrost, regulate described throttling arrangement to normal operating condition.
Preferably, described throttling arrangement is electric expansion valve, and described electric expansion valve is fully on or cancels the shape throttled
State realizes by the aperture of described electric expansion valve is transferred to maximum.
Preferably, described air conditioning system also includes the indoor fan being arranged on described indoor heat exchanger and is arranged on institute
State the outdoor fan on outdoor heat exchanger, wherein,
Described performance element can also control described indoor fan or described outdoor fan action when defrost.
Preferably, control described indoor fan or described outdoor fan action includes: by described indoor fan and described room
The aperture of at least one in outer blower fan is turned down or is closed.
The present invention also provides for the control method of a kind of air conditioning system defrost, and it uses the control of aforesaid air conditioning system defrost
Device, is controlled the defrost process of air conditioning system, comprising:
Judge step, for judging whether described outdoor heat exchanger reaches to need the degree of defrost；
Perform step, control described throttling arrangement according to the judged result judging step and carry out action with when needs defrost
Carry out defrost.
Preferably, also include detecting step, detect the running state parameter of described air conditioning system, and testing result is passed
Transport to judge step；Judge step, the described running state parameter detected and the condition controlling to enter in logic defrost are joined
Number compares, and then judges whether outdoor heat exchanger reaches to need the degree of defrost.
Preferably, if described running state parameter has reached the condition controlling to enter defrost in logic, then its needs are judged
Carry out defrost；
If described running state parameter not up to controls to enter in logic the condition of defrost, then judge its being not required to
Frost.
Preferably, described execution step is that described throttling arrangement is controlled by the judged result according to judging unit:
When needs carry out defrost, control described throttling arrangement fully on or cancel throttling；
When being made without defrost, regulate described throttling arrangement to normal operating condition.
Preferably, described throttling arrangement is electric expansion valve, and described electric expansion valve is fully on or cancels the shape throttled
State realizes by the aperture of described electric expansion valve is transferred to maximum.
Preferably, described air conditioning system also includes the indoor fan being arranged on described indoor heat exchanger and is arranged on institute
State the outdoor fan on outdoor heat exchanger, wherein,
Described execution step controls described indoor fan or the step of described outdoor fan action when being additionally included in defrost.
Preferably, the step controlling described indoor fan or described outdoor fan action includes: by described indoor fan and
The aperture of at least one in described outdoor fan is turned down or is closed.
The present invention also provides for a kind of air conditioning system, and it includes the control device of aforesaid air conditioning system defrost.
Control device, control method and the air conditioning system of a kind of air conditioning system defrost that the present invention provides have the most useful
Effect:
1., by control device, control method and the air conditioning system of the air conditioning system defrost of the present invention, use performance element
Regulation throttling arrangement, to be controlled defrost, eliminates original control carried out by cross valve commutation, it is possible to the most anti-
Only indoor heat exchanger is evaporated heat absorption and indoor environment temperature is reduced when defrost, improves the ambient temperature of indoor,
It is effectively improved the comfort level of indoor；
2. by control device, control method and the air conditioning system of the air conditioning system defrost of the present invention so that indoor heating
Process is continued for, and is again started up heating the time of the longer anti-cold wind of needs, avoiding temperature rise speed after being effectively prevented from defrost
Spend slower situation；
3., by control device, control method and the air conditioning system of the air conditioning system defrost of the present invention, use performance element
Regulation throttling arrangement, to be controlled defrost, eliminates original control carried out by cross valve commutation, it is therefore prevented that compression
The generation of the situation that machine frequent shutdown and cross valve frequently commutate, effectively reduces energy loss, improves air conditioning system fortune
The reliability of row；
4. by control device, control method and the air conditioning system of the air conditioning system defrost of the present invention, it is possible to effectively keep away
The coolant exempted from vaporizer toggles between high temperature-low temperature-high temperature, it is to avoid produce effect of expanding with heat and contract with cold continually
Should, effectively prevent noise and abnormal sound, decrease power consumption, improve reliability of operation；
5. by control device, control method and the air conditioning system of the air conditioning system defrost of the present invention, additionally it is possible to effectively
Prevent the frequent start-stop of compressor and cause it to open at short notice, oil Chamber for compressor of directly lubricating oil being scurried out, and cause
The generation of the problem of compressor oil starvation and insufficient lubrication.
Accompanying drawing explanation
Fig. 1 is structural representation and the coolant flow graph of defrost process of air conditioning system of the prior art；
Fig. 2 is structural representation and the coolant flow graph of defrost process of the air conditioning system of the present invention.
In figure, reference is expressed as:
1 compressor, 2 indoor heat exchangers, 3 outdoor heat exchangers, 4 throttling arrangements, 5 indoor fans, 6 is outdoor
Blower fan, 7 cross valves, 8 fluid reservoirs.
Detailed description of the invention
As in figure 2 it is shown, the present invention provides the control device of a kind of air conditioning system defrost, wherein,
Air conditioning system includes compressor 1, indoor heat exchanger 2, outdoor heat exchanger 3 and throttling arrangement 4, wherein, described control
Device includes:
Judging unit, for judging whether described outdoor heat exchanger 3 reaches to need the degree of defrost；
Performance element, controls described throttling arrangement according to the judged result of judging unit and carries out action with when needs defrost
Carry out defrost.
1., by the control device of the air conditioning system defrost of the present invention, use performance element regulation throttling arrangement with to defrost
It is controlled, eliminates original control carried out by cross valve commutation, it is possible to effectively prevent indoor heat exchanger when defrost
It is evaporated heat absorption and indoor environment temperature is reduced, improve the ambient temperature of indoor, be effectively improved relaxing of indoor
Appropriateness；
2. by the control device of the air conditioning system defrost of the present invention so that indoor heating process is continued for, effectively
Being again started up after avoiding defrost heating needs the time of longer anti-cold wind, avoids the slower situation of temperature rise speed；
3., by the control device of the air conditioning system defrost of the present invention, use performance element regulation throttling arrangement with to defrost
It is controlled, eliminates original control carried out by cross valve commutation, it is therefore prevented that high frequent is shut down and cross valve frequency
The generation of the situation of numerous commutation, effectively reduces energy loss, improves air conditioning system reliability of operation；
4. by the control device of the air conditioning system defrost of the present invention, it is possible to the coolant being effectively prevented from vaporizer is at height
Toggle between temperature-hypo-hyperthermia, it is to avoid produce effect of expanding with heat and contract with cold continually, effectively prevent noise and
Abnormal sound, decreases power consumption, improves reliability of operation；
5. by the control device of the air conditioning system defrost of the present invention, additionally it is possible to be effectively prevented the frequent start-stop of compressor
And cause it to open at short notice, oil Chamber for compressor of directly lubricating oil being scurried out, and cause compressor oil starvation and insufficient lubrication
The generation of problem.
Preferably, also include detector unit, (such as include heat exchange for detecting the running state parameter of described air conditioning system
The parameters such as Guan Wen, ambient temperature, temperature damping's amount, operation time), and testing result is transmitted to judging unit；
Judging unit, by the described running state parameter detected compared with the conditional parameter entering defrost in control logic
Relatively, and then judge its degree whether reaching to need defrost.
(heat exchanger tube temperature, environment is such as included with the running state parameter of detection air conditioning system by also setting up detector unit
The parameters such as temperature, temperature damping's amount, operation time) version, it is possible to effectively by detecting system running state parameter
Mode be the data that judging unit provides needed for judging, and entered in control logic by the running state parameter that detects
The conditional parameter entering defrost is compared, and the conditional parameter controlling to enter in logic defrost can carry out actual setting according to the performance of system
Fixed, so can the performance of effective control system be unlikely to decay too low, make can be given when needs carry out defrost correctly
Signal is so that system can carry out defrost in time accurately, it is ensured that its reliable and stable operation.
Preferably, if described running state parameter has reached the condition controlling to enter defrost in logic, then its needs are judged
Carry out defrost；
If described running state parameter not up to controls to enter in logic the condition of defrost, then judge its being not required to
Frost.
This be the present invention carry out judging whether that this carries out the concrete judgment mode of defrost according to running state parameter, run
When state parameter has reached the condition controlling to enter defrost in logic, then judge that it needs defrost, it is possible to correctly show that needs are held
The time point of row defrost, it is ensured that the normal defrost of system so that it is run safely and reliably, described running state parameter not up to controls
When logic enters the condition of defrost, illustrate that frosting degree is also unlikely to runnability and the security performance of the system that affects, then sentence
Disconnected its is not required to carry out defrost.
Preferably, described throttling arrangement 4 is controlled by described performance element according to the judged result of judging unit:
When needs carry out defrost, control described throttling arrangement 4 fully on or cancel throttling；
When being made without defrost, regulate described throttling arrangement 4 to normal operating condition.
This is the concrete operation step controlling throttling arrangement action when needing defrost of the present invention, carries out defrost at needs
Time, control throttling arrangement is fully on or cancels throttling, it is possible to make on coolant pipes of air conditioning system road substantially without reducing pressure by regulating flow
Impact, high temperature refrigerant first flows through indoor heat exchanger heat release, is directly entered outdoor heat exchanger again and carries out heat release defrosting, the coolant of defrost
There is crushing essentially from compressor work, internal system pipeline in heat, can produce the pressure reduction of high-low pressure, it is possible to effectively ensure
Also ensure that while outdoor heat exchanger is defrosted and indoor heat exchanger is heated effect, it is ensured that indoor comfort level.
Preferably, described throttling arrangement 4 is electric expansion valve, and described electric expansion valve is fully on or cancels the shape throttled
State realizes by the aperture of described electric expansion valve is transferred to maximum.
This is by fully on for throttling arrangement or the specific implementation of cancellation throttling and mode of operation, by throttling arrangement
Aperture is transferred to maximum so that the fluid flowing through throttling arrangement does not produce the effect of throttling, is the most no longer obstructed, now smooth fluid
Ground circulation, is equivalent to flow through a common conduction pipe the same, so that throttling arrangement is fully on or cancels throttling.
Preferably, described air conditioning system also includes the indoor fan 5 being arranged on described indoor heat exchanger 2 and is arranged on
Outdoor fan 6 on described outdoor heat exchanger 3, wherein,
Described performance element can also control described indoor fan 5 and/or described outdoor fan 6 action when defrost.
By the indoor fan being disposed in the interior on heat exchanger and the outdoor fan being disposed in the outdoor on heat exchanger, it is possible to logical
Cross indoor fan to strengthen the heat transfer effect of indoor heat exchanger, improve indoor exchange capability of heat, strengthen outdoor heat exchange by outdoor fan
The heat transfer effect of device, raising outdoor heat exchange ability, during defrost, performance element control room inner blower and/or outdoor fan action can
Control indoor heat exchanger according to situation during defrost and/or outdoor heat exchanger is strengthened heat radiation or reduces heat radiation, to improve defrost
Effect.
Preferably, control described indoor fan 5 or described outdoor fan 6 action includes: by described indoor fan 5 and described
The aperture of at least one in outdoor fan 6 is turned down or is closed.
Performing defrost when, for the normal defrost of outdoor heat exchanger to be ensured, need indoor wind the most as much as possible
Machine is turned down and is even switched off, and so can reduce the indoor environment caloric receptivity to coolant, it is ensured that coolant enters energy in outdoor heat exchanger
Enough carry out normal heat release to realize defrost；Outdoor fan is turned down and even closes, be the flow velocity in order to reduce surrounding air,
To reduce and the heat of surrounding exchange, reduce heat loss, make most heat for defrost, accelerate outer machine heat exchanger
Defrost speed, now the coolant heat in outdoor heat exchanger is the highest.It is further preferred that during defrost, inside and outside blower fan all stops
Operating, inside and outside blower fan shuts down and is provided to reduce the heat exchange with surrounding, reduces heat loss, make most coolant
Heat is used for defrost.This controls logic and can change, and as two blower fans are all adjusted to low windscreen, or one of them closes
Closing, another is turned down, or all closes, and effect is provided to reduce the thermal loss to surrounding.
The present invention also provides for the control method of a kind of air conditioning system defrost, and it uses the control of aforesaid air conditioning system defrost
Device, is controlled the defrost process of air conditioning system, comprising:
Judge step, for judging whether described outdoor heat exchanger 3 reaches to need the degree of defrost；
Perform step, control described throttling arrangement 4 according to the judged result judging step and carry out action with in needs defrost
Shi Jinhang defrost.
1. by the control method of the air conditioning system defrost of the present invention, by regulation throttling arrangement so that defrost is controlled
System, eliminates original control carried out by cross valve commutation, it is possible to effectively prevent indoor heat exchanger from steaming when defrost
Send out heat absorption and indoor environment temperature is reduced, improve the ambient temperature of indoor, be effectively improved the comfort level of indoor；
2. by the control method of the air conditioning system defrost of the present invention so that indoor heating process is continued for, effectively
Being again started up after avoiding defrost heating needs the time of longer anti-cold wind, avoids the slower situation of temperature rise speed；
3. by the control method of the air conditioning system defrost of the present invention, by regulation throttling arrangement so that defrost is controlled
System, eliminates original control carried out by cross valve commutation, it is therefore prevented that high frequent is shut down and cross valve frequently commutates
The generation of situation, effectively reduce energy loss, improve air conditioning system reliability of operation；
4. by the control method of the air conditioning system defrost of the present invention, it is possible to the coolant being effectively prevented from vaporizer is at height
Toggle between temperature-hypo-hyperthermia, it is to avoid produce effect of expanding with heat and contract with cold continually, effectively prevent noise and
Abnormal sound, decreases power consumption, improves reliability of operation；
5. by the control method of the air conditioning system defrost of the present invention, additionally it is possible to be effectively prevented the frequent start-stop of compressor
And cause it to open at short notice, oil Chamber for compressor of directly lubricating oil being scurried out, and cause compressor oil starvation and insufficient lubrication
The generation of problem.
Preferably, also including detecting step, the running state parameter detecting described air conditioning system (such as includes heat exchanger tube
The parameters such as temperature, ambient temperature, temperature damping's amount, operation time), and testing result is transmitted to judging step；
Judge step, by the described running state parameter detected compared with the conditional parameter entering defrost in control logic
Relatively, and then judge whether outdoor heat exchanger reaches to need the degree of defrost.
By also including that detecting step (such as includes heat exchanger tube temperature, environment with the running state parameter of detection air conditioning system
The parameters such as temperature, temperature damping's amount, operation time) version, it is possible to effectively by detecting system running state parameter
Mode be the data that judging unit provides needed for judging, and by running state parameter with control logic enters defrost
Conditional parameter is compared, and the conditional parameter controlling to enter in logic defrost can carry out actual set, such energy according to the performance of system
The performance of enough effective control systems be unlikely to decay too low, make to be given correctly when needs carry out defrost and believe accurately
Number so that system can carry out defrost in time, it is ensured that its reliable and stable operation.It can in addition contain come by heat pamp
Carry out the degree judging whether to reach to need defrost.
Preferably, if described running state parameter has reached the condition controlling to enter defrost in logic, then its needs are judged
Carry out defrost；
If described running state parameter not up to controls to enter in logic the condition of defrost, then judge its being not required to
Frost.
This be the present invention carry out judging whether that this carries out the concrete judgment mode of defrost, knot fortune according to running state parameter
When row state parameter has reached the condition controlling to enter defrost in logic, then judge that it needs defrost, it is possible to correctly draw needs
Perform the time point of defrost, it is ensured that the normal defrost of system so that it is run safely and reliably, the not up to control of described running state parameter
When logic processed enters the condition of defrost, illustrate that frosting degree is also unlikely to runnability and the security performance of the system that affects, then
Judge that it is not required to carry out defrost.
Preferably, described execution step is that described throttling arrangement 4 is controlled by the judged result according to judging unit:
When needs carry out defrost, control described throttling arrangement 4 fully on or cancel throttling；
When being made without defrost, regulate described throttling arrangement 4 to normal operating condition.
This is the concrete operation step controlling throttling arrangement action when needing defrost of the present invention, carries out defrost at needs
Time, control throttling arrangement is fully on or cancels throttling, it is possible to make on coolant pipes of air conditioning system road substantially without reducing pressure by regulating flow
Impact, high temperature refrigerant first flows through indoor heat exchanger heat release, is directly entered outdoor heat exchanger again and carries out heat release defrosting, the coolant of defrost
There is crushing essentially from compressor work, internal system pipeline in heat, can produce the pressure reduction of high-low pressure, it is possible to effectively ensure
Also ensure that while outdoor heat exchanger is defrosted and indoor heat exchanger is heated effect, it is ensured that indoor comfort level.
Preferably, described throttling arrangement 4 is electric expansion valve, and described electric expansion valve is fully on or cancels the shape throttled
State realizes by the aperture of described electric expansion valve is transferred to maximum.
This is by fully on for throttling arrangement or the specific implementation of cancellation throttling and mode of operation, by throttling arrangement
Aperture is transferred to maximum so that the fluid flowing through throttling arrangement does not produce the effect of throttling, is the most no longer obstructed, now smooth fluid
Ground circulation, is equivalent to flow through a common conduction pipe the same, so that throttling arrangement is fully on or cancels throttling.
Preferably, described air conditioning system also includes the indoor fan 5 being arranged on described indoor heat exchanger 2 and is arranged on
Outdoor fan 6 on described outdoor heat exchanger 3, wherein,
Described execution step controls described indoor fan 5 or the step of described outdoor fan 6 action when being additionally included in defrost.
By the indoor fan being disposed in the interior on heat exchanger and the outdoor fan being disposed in the outdoor on heat exchanger, it is possible to logical
Cross indoor fan to strengthen the heat transfer effect of indoor heat exchanger, improve indoor exchange capability of heat, strengthen outdoor heat exchange by outdoor fan
The heat transfer effect of device, raising outdoor heat exchange ability, during defrost, performance element control room inner blower and/or outdoor fan action can
Control indoor heat exchanger according to situation during defrost and/or outdoor heat exchanger is strengthened heat radiation or reduces heat radiation, to improve defrost
Effect.
Preferably, the step controlling described indoor fan 5 or described outdoor fan 6 action includes: by described indoor fan 5
Turn down with the aperture of at least one in described outdoor fan 6 or close.
Performing defrost when, for the normal defrost of outdoor heat exchanger to be ensured, need indoor wind the most as much as possible
Machine is turned down and is even switched off, and so can reduce the indoor environment caloric receptivity to coolant, it is ensured that coolant enters energy in outdoor heat exchanger
Enough carry out normal heat release to realize defrost；Outdoor fan is turned down and even closes, also for the stream reducing surrounding air
Speed, to reduce and the heat of surrounding exchange, reduces heat loss, makes most heat for defrost, accelerate outer machine heat exchange
The defrost speed of device, now the coolant heat in outdoor heat exchanger is the highest.
The present invention also provides for a kind of air conditioning system, and it includes the control device of aforesaid air conditioning system defrost.
1., by the air conditioning system of the present invention, owing to it includes the control device of aforesaid air conditioning system defrost, employing is held
Row unit regulation throttling arrangement, to be controlled defrost, eliminates original control carried out by cross valve commutation, it is possible to
Effectively prevent indoor heat exchanger to be evaporated heat absorption when defrost and indoor environment temperature is reduced, improve the environment of indoor
Temperature, is effectively improved the comfort level of indoor；
2. by the control device of the air conditioning system defrost of the present invention so that indoor heating process is continued for, effectively
Being again started up after avoiding defrost heating needs the time of longer anti-cold wind, avoids the slower situation of temperature rise speed；
3., by the control device of the air conditioning system defrost of the present invention, use performance element regulation throttling arrangement with to defrost
It is controlled, eliminates original control carried out by cross valve commutation, it is therefore prevented that high frequent is shut down and cross valve frequency
The generation of the situation of numerous commutation, effectively reduces energy loss, improves air conditioning system reliability of operation；
4. by the control device of the air conditioning system defrost of the present invention, it is possible to the coolant being effectively prevented from vaporizer is at height
Toggle between temperature-hypo-hyperthermia, it is to avoid produce effect of expanding with heat and contract with cold continually, effectively prevent noise and
Abnormal sound, decreases power consumption, improves reliability of operation；
5. by the control device of the air conditioning system defrost of the present invention, additionally it is possible to be effectively prevented the frequent start-stop of compressor
And cause it to open at short notice, oil Chamber for compressor of directly lubricating oil being scurried out, and cause compressor oil starvation and insufficient lubrication
The generation of problem.
It is further preferred that the air conditioning system of the present invention also include being arranged in air-conditioning duct for air-conditioning is being heated
The cross valve 7 switched between pattern and refrigeration mode, cross valve is by carrying out commutating to heating and freezing between switching pipeline
Switch between pattern.In the air conditioning system of the present invention, throttling arrangement can be selected for electric expansion valve or throttle capillary tube etc. other
The restricting element of class, can play the device of throttling, but electronic expansion valve controls gets up to be relatively easy to and simplicity.
Operation principle and the preferred embodiment of the present invention are described below
The technical scheme that the present invention provides is to solve the problems of conventional inverse defrosting, uses under heating mode brand-new
Defrost technology, carries out continuous heat supply while defrosting.New Defrost technology is applicable to electronic expansion valve system, it is possible to be suitable for hair
Tubule, etc. the throttling arrangement of other classes the system of band bypass valve.Major programme is when defrosting, by the throttling arrangement of internal system
" cancel " or " bypass ", make internal system as far as possible without throttling impact, first flow through indoor evaporator with high temperature refrigerant, and close blower fan
To improve the refrigerant temperature in indoor evaporator, " cancel throttling " thereafter or the high temperature refrigerant of " bypass " is directly entered condenser again
Defrost, improve user's comfort.
The following technical problem that the present invention solves
Compressor shutdown, the cross valve loss that brings of commutation and integrity problem frequently when 1, solving defrost.
2, during solving to defrost under refrigeration mode, vaporizer a large amount of absorption chamber internal ring heat, user's comfort is poor
Problem.
3, solve structure in defrosting to expand with heat and contract with cold the frequent abnormal sound noise problem brought.
Beneficial effect:
The present invention uses and defrosts under heating mode, and during defrosting, electric expansion valve standard-sized sheet, indoor and outdoor blower fan cuts out, carries as far as possible
The high enthalpy entering outdoor condenser coolant, is directly carried out defrost by high temperature refrigerant to outdoor condenser, and after defrost, coolant returns to
Compressor liquid storage device.During defrost, high temperature refrigerant first flows through indoor set heat exchanger simultaneously, it is ensured that the temperature of indoor heat exchanger is always
Maintain more than 35 DEG C, heat will not be absorbed to internal ring, also by radiation heat transfer, room ambient be carried out heat release, fuselage
Human feeling around is " hotness ", and comfortableness is preferable, reduces compressor and the problem that frequently commutates of cross valve, and interior machine portion
The effect of expanding with heat and contract with cold of separation structure, increases service life, increases system reliability, reduces abnormal sound noise, and reliability aspect can solve
Compressor of determining is altered oil and is caused the oil level insufficient lubrication problem caused on the low side.
As it is shown in figure 1, coolant during the normal heating operation of routine flow to be: compressor → indoor heat exchanger (vaporizer)
→ throttling arrangement (electric expansion valve) → outdoor heat exchanger (condenser).When entering routine defrosting, cross valve commutates, and pattern is automatic
Transferring refrigerating operaton to, the coolant flow direction is: compressor → outdoor heat exchanger (condenser) → throttling arrangement (electric expansion valve) → room
Interior heat exchanger (vaporizer), as it is shown in figure 1, the high temperature refrigerant discharged by compressor flows through condenser, is carried out in condenser
Heat exchange defrosts, and after defrosting terminates, cross valve commutates again, goes back to heating mode, carries out normal system circulation heating.Normal at this
During rule defrost, at a temperature of the inner tube of its indoor heat exchanger, it is down to less than-30 DEG C, absorbs heat to surrounding air, reduce Indoor Temperature
Degree, and the conversion back and forth of high temperature-low temperature-high temperature refrigerant in vaporizer, make interior machine section structure be affected by, and produces flatulence of heat type cold
Contracting effect, easily causes structure and produces the abnormal sound noise of " click, click ".
The present invention can the defrost scheme of continuous heating, as shown in Figure 2: when entering defrost, remain in that the state of heating,
Indoor and outdoor blower fan cuts out, electric expansion valve standard-sized sheet so that it is the coolant flow direction is: compressor → indoor heat exchanger (vaporizer) → outdoor
Heat exchanger (condenser) → compressor, there is crushing essentially from compressor work, internal system pipeline in the coolant heat of defrost,
The pressure reduction of high-low pressure can be produced.As in figure 2 it is shown, the high temperature refrigerant discharged by compressor flows through condenser, in condenser
Carrying out heat exchange defrosting, after defrosting terminates, electric expansion valve resets, and recovers normal heating operation mode.Make the inner tube of vaporizer
Temperature is maintained at more than 35 DEG C, by radiation heat transfer, surrounding can be carried out heat release, and comfortableness is preferable, reduces compressor and four
The problem that frequently commutates of logical valve, and the effect of expanding with heat and contract with cold of interior machine part-structure, increase service life, increases system reliable
Property, reduce abnormal sound noise.
New Defrost technology is applicable to electronic expansion valve system, it is possible to be suitable for capillary tube, etc. other classes throttling arrangement also
System with bypass valve.
Those skilled in the art is it is easily understood that on the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.With
It is only the preferred embodiment of the present invention described on, it is noted that for those skilled in the art, not
On the premise of departing from the technology of the present invention principle, it is also possible to make some improvement and modification, these improve and modification also should be regarded as this
The protection domain of invention.
Claims (15)
1. the control device of an air conditioning system defrost, it is characterised in that:
Air conditioning system includes compressor (1), indoor heat exchanger (2), outdoor heat exchanger (3) and throttling arrangement (4), wherein, described
Control device to include:
Judging unit, is used for judging the degree whether described outdoor heat exchanger (3) reaches to need defrost；
Performance element, controls described throttling arrangement according to the judged result of judging unit and carries out action to carry out when needs defrost
Defrost.
Control device the most according to claim 1, it is characterised in that:
Also include detector unit, for detecting the running state parameter of described air conditioning system, and testing result is transmitted to sentencing
Disconnected unit；
Judging unit, by the described running state parameter detected compared with the conditional parameter entering defrost in control logic,
And then judge whether outdoor heat exchanger reaches to need the degree of defrost.
Control device the most according to claim 2, it is characterised in that:
If described running state parameter has reached the condition controlling to enter defrost in logic, then judge that it needs to carry out defrost；
If described running state parameter not up to controls to enter in logic the condition of defrost, then judge that it is not required to carry out defrost.
4. according to the control device one of claim 1-3 Suo Shu, it is characterised in that: described performance element is according to judging unit
Described throttling arrangement (4) is controlled by judged result:
When needs carry out defrost, control described throttling arrangement (4) fully on or cancel throttling；
When being made without defrost, regulate described throttling arrangement (4) to normal operating condition.
Control device the most according to claim 4, it is characterised in that: described throttling arrangement (4) is electric expansion valve, described
Fully on or cancellation throttling the state of electric expansion valve realizes by the aperture of described electric expansion valve is transferred to maximum.
6. according to the control device one of claim 1-5 Suo Shu, it is characterised in that: described air conditioning system also includes being arranged on institute
State the indoor fan (5) on indoor heat exchanger (2) and the outdoor fan (6) being arranged on described outdoor heat exchanger (3), its
In,
Described performance element can also control described indoor fan (5) or described outdoor fan (6) action when defrost.
Control device the most according to claim 6, it is characterised in that: control described indoor fan (5) or described outdoor wind
Machine (6) action includes: the aperture of at least one in described indoor fan (5) and described outdoor fan (6) is turned down or closed
Close.
8. the control method of an air conditioning system defrost, it is characterised in that: use the air conditioning system that one of claim 1-7 is described
The control device of defrost, is controlled the defrost process of air conditioning system, comprising:
Judge step, be used for judging the degree whether described outdoor heat exchanger (3) reaches to need defrost；
Perform step, control described throttling arrangement (4) according to the judged result judging step and carry out action with when needs defrost
Carry out defrost.
Control method the most according to claim 8, it is characterised in that:
Also include detecting step, detect the running state parameter of described air conditioning system, and by testing result transmission to judging step
Suddenly；
Judge step, by the described running state parameter detected compared with the conditional parameter entering defrost in control logic,
And then judge whether outdoor heat exchanger reaches to need the degree of defrost.
Control method the most according to claim 9, it is characterised in that:
If described running state parameter has reached the condition controlling to enter defrost in logic, then judge that it needs to carry out defrost；
If described running state parameter not up to controls to enter in logic the condition of defrost, then judge that it is not required to carry out defrost.
11. one of-10 described control methods according to Claim 8, it is characterised in that: detect according to described execution step and sentence
Described throttling arrangement (4) is controlled by the judged result of disconnected step:
When needs carry out defrost, control described throttling arrangement (4) fully on or cancel throttling；
When being made without defrost, regulate described throttling arrangement (4) to normal operating condition.
12. control methods according to claim 11, it is characterised in that: described throttling arrangement (4) is electric expansion valve, institute
State fully on or cancellation throttling the state of electric expansion valve to realize by the aperture of described electric expansion valve is transferred to maximum.
13. one of-12 described control methods according to Claim 8, it is characterised in that: described air conditioning system also includes being arranged on
Indoor fan (5) on described indoor heat exchanger (2) and the outdoor fan (6) being arranged on described outdoor heat exchanger (3), its
In,
Described execution step controls described indoor fan (5) or the step of described outdoor fan (6) action when being additionally included in defrost.
14. control methods according to claim 13, it is characterised in that: control described indoor fan (5) or described outdoor
The step of blower fan (6) action includes: the aperture of at least one in described indoor fan (5) and described outdoor fan (6) adjusted
Little or close.
15. 1 kinds of air conditioning systems, it is characterised in that: include that the control of the air conditioning system defrost described in one of claim 1-7 fills
Put.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610643523.7A CN106247533A (en) | 2016-08-08 | 2016-08-08 | Control device, control method and the air conditioning system of a kind of air conditioning system defrost |
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| CN201610643523.7A CN106247533A (en) | 2016-08-08 | 2016-08-08 | Control device, control method and the air conditioning system of a kind of air conditioning system defrost |
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| CN201610643523.7A Pending CN106247533A (en) | 2016-08-08 | 2016-08-08 | Control device, control method and the air conditioning system of a kind of air conditioning system defrost |
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| CN110469974A (en) * | 2019-07-25 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110953662A (en) * | 2018-09-26 | 2020-04-03 | 东芝开利株式会社 | Air conditioner |
| CN112856719A (en) * | 2021-01-26 | 2021-05-28 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner and air conditioner |
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Application publication date: 20161221 |