CN104634008B - The control method of air-conditioning device - Google Patents
The control method of air-conditioning device Download PDFInfo
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- CN104634008B CN104634008B CN201310567361.XA CN201310567361A CN104634008B CN 104634008 B CN104634008 B CN 104634008B CN 201310567361 A CN201310567361 A CN 201310567361A CN 104634008 B CN104634008 B CN 104634008B
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- 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
The invention discloses a kind of control method of air-conditioning device, one end of the regenerative heat exchanger of regenerative apparatus is connected on the pipeline between first throttle element and indoor heat exchanger by the second restricting element, the other end is connected through the first control valve with the air entry of compressor, second control valve one end is connected on the pipeline between regenerative heat exchanger and the first control valve, and the other end is connected with compressor increasing enthalpy mouthful；Control method includes：When starting refrigeration and heating operation, control first controls valve and the second control valve to close；In refrigeration and heating process, outdoor environment temperature is detected, judged whether to need increasing enthalpy according to the outdoor environment temperature for detecting, and control the opening and closing of valve according to judged result control second.The control method of air-conditioning device of the invention so that regenerative apparatus both can be used for defrosting, and be used in the case where normally freezing and heating, and increased the heating capacity and efficiency under the refrigerating capacity and heating mode under refrigeration mode, improve the utilization rate of regenerative apparatus.
Description
Technical field
The present invention relates to field of air conditioning, more particularly to a kind of control method of air-conditioning device.
Background technology
When low temperature heating is operated, outdoor heat exchanger surface can form frost layer to heat pump type air conditioner, in order to not influence to heat
Effect, the Defrost mode for generally using at present is that pattern is switched to refrigeration mode, this kind of Defrost mode can to indoor radiation cold,
Cause fluctuations in indoor temperature big, influence comfortableness.
It is that regenerative apparatus is installed around compressor of outdoor unit to solve the measure used in this problem, current industry,
Defrosted using regenerative apparatus accumulation compressor used heat.Although this mode can realize that there is certain input interior during defrosting
Heat, amount of stored heat also has preferably utilization, but indoor heating capacity is not significantly improved in normal heating, particularly low
It is more significantly in the case of temperature, and the heating operation higher for refrigerating state and temperature, regenerative apparatus does not open effect, therefore stores
Thermal utilization ratio is low.
The content of the invention
For above-mentioned state of the art, the technical problems to be solved by the invention are, there is provided a kind of air-conditioning device
Control method, makes regenerative apparatus when being used under normally freezing and heat, and increases the system under the refrigerating capacity and heating mode of refrigeration
Heat, improves regenerative apparatus utilization rate.
In order to solve the above-mentioned technical problem, the control method of a kind of air-conditioning device provided by the present invention, the air-conditioning dress
Put including compressor, reversal valve, outdoor heat exchanger, first throttle element and indoor heat exchanger, the reversal valve is included mutually simultaneously
The first interface of first reversal valve and the second reversal valve of connection, the first reversal valve and the second reversal valve and the exhaust of the compressor
Mouth connection, the first reversal valve and the second interface of the second reversal valve are connected with the air entry of compressor, and the 3rd of the first reversal valve the
Interface is connected with the indoor heat exchanger, and the 3rd interface of the second reversal valve is connected with the outdoor heat exchanger；The air-conditioning dress
Put and also include the second restricting element, regenerative apparatus, the first control valve and the second control valve, the regenerative apparatus includes being used for accumulating
The heat-storing material of compressor used heat and carry out the regenerative heat exchanger of heat exchange, the regenerative heat exchange using the accumulation of heat of the heat-storing material
One end of device is connected on the pipeline between the first throttle element and the indoor heat exchanger by the second restricting element, separately
The control valve of one end first is connected with the air entry of the compressor, and described second control valve one end is connected to the regenerative heat exchange
On pipeline between device and the first control valve, the other end is connected with compressor increasing enthalpy mouthful, and the control method includes：
When starting refrigeration and heating operation, the first control valve and the second control valve is controlled to close；
In refrigeration and heating process, the outdoor environment temperature is detected, according to the outdoor environment temperature for detecting
Degree judges whether to need increasing enthalpy, and according to the opening and closing of judged result control the second control valve.
Wherein in one embodiment, the control method also includes：
In refrigeration and heating process, the regenerative apparatus temperature is detected, according to the regenerative apparatus temperature for detecting
The opening and closing of degree control the first control valve.
Wherein in one embodiment, the control method includes：
S1, whether the regenerative apparatus temperature is judged more than or equal to design temperature A3, if it is, step S2 is transferred to,
If it is not, then being transferred to step S4；
S2, judge whether to need increasing enthalpy according to the outdoor environment temperature, if it is, step S3 is transferred to, if it is not, then
It is transferred to step S5；
S3, control the second control valve are opened, into increasing enthalpy operation；
S4, judge whether to need increasing enthalpy according to the outdoor environment temperature, if it is, the step S3 is transferred to, if
It is no, it is transferred to step S5；
Whether S5, control the first control valve are opened, judge the regenerative apparatus temperature less than or equal to design temperature
A1, if it is, control the first control valve is closed.
Wherein in one embodiment, judge whether that the step of needing increasing enthalpy includes according to outdoor environment temperature：
During refrigerating operaton, if the environment temperature is more than or equal to design temperature C1, increasing enthalpy is needed；
During heating operation, if the environment temperature is less than or equal to design temperature C2, increasing enthalpy is needed.
Wherein in one embodiment, the step S1 also includes：Judge whether the regenerative apparatus temperature is more than or waits
In design temperature A4, if it is, control the compressor to close, wherein A4>A3.
Wherein in one embodiment, the step S5 also includes：Reduced while controlling the first control valve to open
The throttle degree of the first throttle element.
Wherein in one embodiment, the control method also comprises the following steps：
In B1, heating process, the indoor heat exchanger temperature, the outdoor heat exchanger inlet temperature, outdoor are detected
Environment temperature and continuous heating run time；
The indoor heat exchanger temperature and/or the outdoor heat exchanger inlet temperature and outdoor ring that B2, basis are detected
Border temperature and/or continuous heating run time, judge whether to meet the condition for entering Defrost operation, if it is, being transferred to step
B3；
B3, into Defrost operation；
During B4, Defrost operation, the outdoor heat exchanger temperature, outdoor environment temperature and defrosting time are detected, according to
The outdoor heat exchanger temperature and outdoor environment temperature and/or defrosting time for detecting, judge whether to meet and exit defrosting
Condition, if it is, being transferred to step B5；
B5, exit Defrost operation.
Wherein in one embodiment, the step B2 is specially：
B21, when continuous heating run time reaches setting time Time1, judge real-time detection to the interior change
Whether the difference DELTA T1 between hot device temperature and previously detected indoor heat exchanger maximum temperature is more than or equal to design temperature
A5, if it is, the step B3 is transferred to, if it is not, then being transferred to B22；
Corresponding to B22, the outdoor heat exchanger inlet temperature that judgement is detected and the outdoor environment temperature at that time
Outdoor heat exchanger temperature between difference DELTA T2 whether be more than or equal to design temperature A6, if it is, being transferred to the step
B3, if it is not, then being transferred to step B23；
B23, judge whether continuous heating run time reaches setting time Time3, if it is, being transferred to the step
B3, if being otherwise transferred to the B21, wherein Time3>Time1.
Wherein in one embodiment, the step B3 includes：
B31, the detection regenerative apparatus temperature, judge it is to enter special removing according to the regenerative apparatus temperature for detecting
Frost operation or enter conventional Defrost operation, if into special Defrost operation, being then transferred to step B32, if into normal
Rule Defrost operation, then be transferred to step B33；
B32, control second reversal valve go to refrigeration direction, control the first control valve to open, and then control institute
State compressor frequency and rise to defrosting frequency, carry out special defrosting；
B33, control first reversal valve and second reversal valve switch to direction of freezing, and then control the compressor
Frequency rises to defrosting frequency, carries out conventional defrosting.
Wherein in one embodiment, the step B31 is specially：
Whether the regenerative apparatus temperature is judged more than or equal to design temperature A2, if it is, being transported into special defrosting
OK, if it is not, then into conventional Defrost operation.
Wherein in one embodiment, the step B32 also includes：
During special Defrost operation, the aperture of the first throttle element is controlled to the first aperture, by setting time
After Time4, the aperture of the first throttle element is controlled to the second aperture, wherein, second aperture is opened more than described first
Degree.
Wherein in one embodiment, the step B32 also includes：
During special Defrost operation, real-time detection outdoor environment temperature and the outdoor heat exchanger inlet temperature judge
Whether the difference DELTA T3 between the outdoor environment temperature for detecting and the outdoor heat exchanger inlet temperature is less than setting temperature
Degree A7, if it is, control outdoor fan is out of service.
Wherein in one embodiment, the step B33 also includes：
During conventional Defrost operation, the compressor exhaust temperature or suction superheat, the institute that judgement is detected are detected
State whether whether compressor exhaust temperature be less than setting value less than setting value or suction superheat, if it is, control is described
First control valve is opened.
Wherein in one embodiment, the step B33 also includes：
During conventional Defrost operation, the inlet temperature of real-time detection outdoor environment temperature and outdoor heat exchanger judges inspection
When whether the difference DELTA T2 between the outdoor environment temperature and outdoor heat exchanger inlet temperature that measure is less than design temperature A7,
If it is, control outdoor fan is out of service.
Wherein in one embodiment, the step B33 also includes：
The aperture of the first throttle element is controlled to the first aperture, by after setting time Time4, controlling described first
The aperture of restricting element to the second aperture, wherein, second aperture be more than first aperture.
Wherein in one embodiment, also include before the step 31：
The compressor frequency is reduced, when compressor frequency is reduced to setpoint frequency, or high pressure sensor is detected
Pressure be less than setting value when, be transferred to the step B31.
Wherein in one embodiment, also include before the step B31：
The low windscreen operation of control indoor fan, real-time detection indoor heat exchanger temperature, the indoor heat exchanger that judgement is detected
Whether temperature is less than design temperature A8, if it is, control indoor fan is out of service.
Wherein in one embodiment, the step B4 is specially：
Whether the outdoor heat exchanger temperature that judgement is detected is more than or equal to the outdoor corresponding to outdoor environment temperature
Heat exchange temperature M, if it is, the step B5 is transferred to, if not, judge whether defrosting time reaches setting time Time2,
If it is, being transferred to the step B5.
Wherein in one embodiment, during special Defrost operation, if turned because defrosting time reaches setting time Time2
Enter the step B5, count 1 time, meanwhile, the M is increased Δ A；Into before the step B31, whether stored counts is judged
Reach n times, if it is, being transferred to the B33, and stored counts is reset.
Compared with prior art, the control method of air-conditioning device of the invention, by detecting that the outdoor environment temperature is sentenced
It is disconnected whether to need increasing enthalpy, the opening and closing of valve are controlled according to judged result control second so that regenerative apparatus both can be used for
Defrosting, the comfortableness of user during improving defrosting, and used in the case where normally freezing and heating, increased the refrigeration under refrigeration mode
Heating capacity and efficiency under amount and heating mode, improve the utilization rate of regenerative apparatus.
Additional technical feature of the present invention has the advantage that will be illustrated in specific embodiment of the invention part.
Brief description of the drawings
Fig. 1 is the system diagram of the air-conditioning device in the embodiment of the present invention one；
Fig. 2 is the control flow chart of the refrigerating operaton of air-conditioning device shown in Fig. 1；
Fig. 3 is the heating operation and the control flow chart of Defrost operation of air-conditioning device shown in Fig. 1；
Fig. 4 is the control flow chart of the heating and defrosting operation of air-conditioning device shown in Fig. 1；
Fig. 5 is the special defrosting of air-conditioning device shown in Fig. 1 to the control flow chart of heating operation；
Fig. 6 is that the corresponding defrosting started temperature of outdoor environment temperature of air-conditioning device shown in Fig. 1 and special defrosting enter
Pipe temperature correction map；
Fig. 7 is the protection control skeleton diagram of the regenerative apparatus based on regenerative apparatus temperature of air-conditioning device shown in Fig. 1；
Fig. 8 is the system diagram of the air-conditioning device in the embodiment of the present invention two.
Above in each figure, 01- compressors；10- indoor heat exchangers；20- outdoor heat exchangers；35- first controls valve；38-
Two restricting elements；32- second controls valve；30- first throttle elements；The four-way valves of 51- first；The four-way valves of 52- second；60- accumulation of heats
Device；601- heat storage tanks；602- regenerative heat exchangers；The triple valves of 61- first；The triple valves of 62- second；The check valves of 71- first；81-
Second check valve；40- outdoor environment temperature detection means；50- outdoor heat exchanger temperature-detecting devices；70- regenerative apparatus temperature
Detection means；80- indoor environment temperature detection means；90- indoor heat exchanger temperature-detecting devices.
Specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments the present invention is described in detail.It should be noted that not conflicting
In the case of, the feature in following embodiment and embodiment can be mutually combined.
Fig. 1 show the system diagram of the air-conditioning device in the embodiment of the present invention one, as shown in figure 1, air-conditioning device is including double
Level enthalpy-increasing compressor 01, the first four-way valve 51, the second four-way valve 52, outdoor heat exchanger 20, first throttle element 30, indoor heat exchange
Device 10, the outdoor environment temperature detection means 40 for detecting outdoor environment temperature, the room for detecting outdoor heat exchanger temperature
External heat exchanger temperature-detecting device 50, the regenerative apparatus temperature-detecting device 70 for detecting regenerative apparatus temperature, for detecting
The indoor environment temperature detection means 70 of indoor environment temperature, the indoor environment temperature detection dress for detecting indoor environment temperature
Put 80 and for detecting the indoor heat exchanger temperature-detecting device 90 of indoor heat exchange temperature, wherein, the first four-way valve 51 and
The first interface of two four-way valves 52 is connected with the exhaust outlet of compressor 01, and the second of the first four-way valve 51 and the second four-way valve 52 connects
Air entry of the mouth all with compressor 01 is connected；3rd interface of the first four-way valve 5161 is connected with indoor heat exchanger 10, and the two or four
3rd interface of port valve 52 is connected with outdoor heat exchanger 20.The air-conditioning device also includes the second restricting element 38, regenerative apparatus
60th, first control valve 35 and second control valve 32, the regenerative apparatus 60 include be used for accumulate the used heat of compressor 01 positioned at storage
Heat-storing material in heat channel 601 and the regenerative heat exchanger 602 of heat exchange is carried out using the accumulation of heat of the heat-storing material, the accumulation of heat is changed
One end of hot device 602 is connected between the first throttle element 30 and the indoor heat exchanger 10 by the second restricting element 38
Pipeline on, the other end be connected through the first control valve 35 with the air entry of the compressor 01, and described second controls valve 32 one end
It is connected on the pipeline between the regenerative heat exchanger 602 and the first control valve 35 through connecting tube, the other end is through connecting tube
It is connected with the increasing enthalpy of compressor 01 mouthful.The first control control valve 32 of valve 35 and second is preferably magnetic valve.
Fig. 2 show the control flow chart of the refrigerating operaton of the air-conditioning device of the present embodiment, and Fig. 3 is shown in the present embodiment
Air-conditioning device heating operation to defrost when control flow chart.As shown in Figure 2,3, the air-conditioning device control in the present embodiment
Method comprises the following steps：
Step S0, start refrigeration and during heating operation, control the first control valve 35 and the second control valve 32 to close
Close.
As shown in figure 1, during refrigeration, refrigerant is delivered to 0 point of split point through compressor 01, and refrigerant is punished in 0 node
Stream, a part of fluid through refrigerant pipe 222 flow into the first four-way valve 51, after flowed by the second check valve 81 along refrigerant branch pipe 204
To at the B in circulation figure；Another part flows through refrigerant branch pipe 221 and flows into the second four-way valve 52, and two parts fluid is in node B points
Place confluxes, and condensing heat-exchange is carried out in outdoor heat exchanger 20.Refrigerant is again by the reducing pressure by regulating flow of first throttle element 30, throttling drop
Indoor heat exchanger 10 is reached by refrigerant pipe 201 after pressure, heat exchange is evaporated in heat exchanger 10 indoors, the heat on the inside of absorption chamber
Amount, reduces the temperature of indoor, and refrigerant is heated to form saturation or superheat state, through refrigerant branch pipe 223, the first four-way valve
51st, refrigerant pipe 230 returns to the air entry end of compressor 01, completes a complete kind of refrigeration cycle.
When heating, high temperature and high pressure gaseous refrigerant is pumped into refrigerant pipe 222 and 221 by compressor 01, arrives separately at the one or four
The four-way valve 52 of port valve 51 and second, flows into refrigerant pipe 207, with warp through the refrigerant of the second four-way valve 52 by the first check valve 71
The refrigerant of the first four-way valve 51 converges in A points, after heat release is condensed at heat exchanger 10 indoors, forced convertion is carried out herein and is changed
Heat, realizes and heat of high temperature is passed to indoor, lifts the effect of indoor temperature.Refrigerant is arrived through first throttle element 30
Heat absorption evaporation process is carried out up in outdoor heat exchanger 20, in the heat of absorption air herein.Refrigerant be heated to form saturation or
Oversaturated refrigerant, the air entry of compressor 01 is returned to after through refrigerant pipe 220, refrigerant pipe 230, and completion one is complete to be heated
Circulation.
While refrigeration and heating operation, the heat that the spontaneous collection of the meeting of regenerative apparatus 60 is distributed from the periphery of compressor 01
Amount.
Step S1, whether the temperature of the regenerative apparatus 60 is judged more than or equal to design temperature A3, if it is, being transferred to step
Rapid S2, if it is not, then being transferred to step S4.
Step S2, judge whether to need increasing enthalpy according to the outdoor environment temperature, if it is, step S3 is transferred to, if
It is no, then it is transferred to step S5.Preferably, judge whether that the step of needing increasing enthalpy includes according to outdoor environment temperature：During refrigerating operaton,
If the environment temperature is more than or equal to design temperature C1, increasing enthalpy is needed；During heating operation, if the environment temperature is small
In or equal to design temperature C2, then increasing enthalpy is needed.C1 is preferably 22~32 DEG C, and C2 is preferably 5~15 DEG C.
Step S3, control the second control valve 32 are opened, into increasing enthalpy operation.
As shown in figure 1, during refrigerating operaton, when the second control valve 32 is opened, by the gas-liquid two-phase cold-producing medium after throttling
A shunting part enters further reducing pressure by regulating flow in the second restricting element 38 through refrigerant pipe 101, and rear refrigerant flows into regenerative apparatus
The heat that heat-storing material is absorbed is absorbed in 60 so that reach oversaturated state by the refrigerant of regenerative apparatus 60, flow afterwards
Enter secondary increasing enthalpy air entry, realize opening increasing enthalpy process while refrigeration, raising returns to the cold medium flux of compressor 01.In room
During outer temperature refrigeration higher, delivery temperature is higher, and the load of compressor 01 is higher, now opens enthalpy-increasing function, both reduces accumulation of heat
The temperature of device 60, reduces the load of compressor 01 again, improves the efficiency of whole machine.In the relatively low refrigeration of outdoor temperature, by bypass
Refrigerant is lowered the temperature to regenerative apparatus 60 all the way, while refrigerant flow is not reduced, it is to avoid heat accumulation function fails.
During heating operation, when the second control valve 32 is opened, a part is shunted by condensed gas-liquid two-phase cold-producing medium
Enter reducing pressure by regulating flow in the second restricting element 38 through refrigerant pipe 101, rear refrigerant absorbs heat-storing material in flowing into regenerative apparatus 60
The heat for being absorbed so that reach oversaturated state by the refrigerant of regenerative apparatus 60, flows into secondary increasing enthalpy air entry afterwards,
Realize opening increasing enthalpy process while heating.When outdoor temperature is relatively low heat when, open increasing enthalpy loop, the system for now heating
Refrigerant cycle amount increases, and heating capacity accordingly increases, while the temperature of regenerative apparatus 60 also will not be too high, it is to avoid Problem of Failure.
Outdoor temperature is higher when heating, and by bypass, refrigerant is lowered the temperature to regenerative apparatus 60 all the way, it is to avoid regenerative apparatus 60 fails.
Step S4, judge whether to need increasing enthalpy according to the outdoor environment temperature, if it is, the step S3 is transferred to,
Step S5 is transferred to if not.
Step S5, control the first control valve 35 are opened, and judge whether the temperature of the regenerative apparatus 60 is less than or equal to
Design temperature A1, if it is, control the first control valve 35 is closed.By this control mode, can guarantee that regenerative apparatus 60 exists
Normally freeze and heat under state, temperature is rotten without occurring in rational scope, transition evaporation, it is ensured that the reliability of its function
Property.The size of A1, A3 is determined by the property of heat-storing material, and in the present embodiment, A3 values are 70~90 DEG C, and the span of A1 is
50~60 DEG C.
The control method of the air-conditioning device in the present embodiment, reduces the risk that regenerative apparatus 60 fails because temperature is too high.
And, regenerative apparatus 60 both can be used for defrosting, the comfortableness of user during improving defrosting, and make in the case where normally freezing and heating
With increased refrigerating capacity and heating capacity and the efficiency under refrigeration, heating mode.Control method of the invention, can be rationally
Judge unit enter defrosting time, and enter defrosting after limited heat loss, borrow as far as possible the external world heat
Defrosting, and ensure the completeness of defrosting.
Further, the step S1 also includes：Judge the temperature of the regenerative apparatus 60 whether more than or equal to setting temperature
Degree A4, if it is, control the compressor 01 to close, wherein A4>A3.If the constant temperature of regenerative apparatus 60 is raised reached
A4, compressor 01 is out of service, so as to reach the purpose of reliably protecting regenerative apparatus 60.A4 spans are 75 in the present embodiment
~95 DEG C.
Further, the step S5 also includes：Described first is reduced while controlling the first control valve 35 to open
The throttle degree of restricting element 30 so that refrigerant flow is not reduced.
Fig. 3 show the heating operation of air-conditioning device and the control flow chart of Defrost operation, as shown in figure 3, air-conditioning device
Control method also include：
Step B1, the detection temperature of indoor heat exchanger 10, the inlet temperature of the outdoor heat exchanger 20, outdoor environment temperature
With continuous heating run time；
Step B2, according to the temperature of the indoor heat exchanger 10 and/or the inlet temperature of the outdoor heat exchanger 20 and outdoor ring
Border temperature and/or continuous heating run time, judge whether to meet the condition for entering Defrost operation, if it is, being transferred to step
B3。
More preferably, the step B2 is specially：
Step B21, when continuous heating run time reaches setting time Time1, judge the room that real-time detection is arrived
Whether the difference DELTA T1 between the temperature of interior heat exchanger 10 and the previously detected maximum temperature of indoor heat exchanger 10 is more than or equal to
Design temperature A5 (A5 is preferably 3~10 DEG C), if it is, the step B3 is transferred to, if it is not, then being transferred to B22；
The inlet temperature of the outdoor heat exchanger 20 that step B22, judgement are detected and the outdoor environment temperature at that time
Whether more than or equal to design temperature A6, (A6 is preferably -25~1 to difference DELTA T2 between the corresponding temperature of outdoor heat exchanger 20
DEG C), if it is, the step B3 is transferred to, if it is not, then being transferred to step B23；
Step B23, judge whether continuous heating run time reaches setting time Time3, if it is, being transferred to the step
Rapid B3, if being otherwise transferred to the B21, wherein Time3>Time1.
Whether the present embodiment enters Defrost operation using three condition judgments, can effectively judge the frosting journey of outdoor heat exchanger 20
Degree, and three condition complementations, it is to avoid certain condition failure deviation occurs and causes frosting serious without defrosting phenomenon,
Influence heating effect.
Step B3, into Defrost operation.
During step B4, Defrost operation, when detecting the temperature of outdoor heat exchanger 20, outdoor environment temperature and defrosting
Between, according to the temperature of the outdoor heat exchanger 20 and outdoor environment temperature and/or defrosting time that detect, judge whether that satisfaction is moved back
Go out the condition of defrosting, if it is, being transferred to step B5.
Step B5, exit Defrost operation.
Fig. 5 show the control flow chart of the Defrost operation of the air-conditioning device in the present embodiment.As shown in figure 5, defrosting control
Method processed includes：
Step B31, detect the temperature of regenerative apparatus 60, according to the temperature of the regenerative apparatus 60 for detecting judge be into
Enter special Defrost operation and still enter conventional Defrost operation, if into special Defrost operation, being then transferred to step B32, if
It is to enter conventional Defrost operation, then is transferred to step B33.
More preferably, the step B31 is specially：Judge the temperature of the regenerative apparatus 60 whether more than or equal to design temperature
A2, if it is, being transferred to step B32, then into special Defrost operation, if not, being transferred to step B33, then enters conventional defrosting fortune
OK, wherein A2<A1<A3.Control as far as possible provide enough heat supply chamber inner sides by this and outdoor heat exchanger defrost,
Avoid shortage of heat and influence indoor comfortableness and outdoor heat exchanger to defrost.The value of the design temperature A2 in the present embodiment
Scope is 25~35 DEG C.
B32, control second reversal valve go to refrigeration direction, control the first control valve 35 to open, and then control
The frequency of the compressor 01 rises to defrosting frequency, carries out special defrosting.
See Fig. 1, during special Defrost operation, the first four-way valve 51 does not commutate, and high-temperature high-pressure refrigerant is vented from compressor 01
Mouth discharge, part of refrigerant gets in heat exchanger 10 by the first four-way valve 51, with room air heat exchange, another part
Refrigerant enters outdoor heat exchanger 20 by the second four-way valve 52, after outdoor air heat exchange, by first throttle element 30, with
Refrigerant by indoor heat exchanger 10 converges in C points, then by flowing back to pressure after the second restricting element 38 and regenerative apparatus 60
The air entry of contracting machine 01.
Preferably, the step B32 also includes：
Step B322, control the aperture of the first throttle element 30 to the first aperture L1 (L1 is preferably 150~350)；
Step B323, by after setting time Time4, being transferred to step B326；
Step B326, the aperture of the first throttle element 30 is controlled to the second aperture L2, wherein, second aperture is big
In first aperture.Preferably, L1+50≤L2≤L1+100.
Preferably, the step B32 also includes：
During B324, special Defrost operation, real-time detection outdoor environment temperature and the import temperature of the outdoor heat exchanger 20
Whether degree, the difference DELTA T3 between the outdoor environment temperature that detects of judgement and the inlet temperature of the outdoor heat exchanger 20 is small
When design temperature A7 (A7 is preferably 0~2 DEG C), if it is, being transferred to step B325；
Step B325, control outdoor fan are out of service.
Outdoor fan being controlled in this way, making full use of outdoor environment heat to defrost, reduce defrosting time, reduction is removed
White energy resource consumption.
B33, control first four-way valve 51 and second four-way valve 52 switch to direction of freezing, and then control the pressure
The frequency of contracting machine 01 rises to defrosting frequency, carries out conventional defrosting.Conventional defrosting is refrigerating operaton, be will not be repeated here.
Preferably, the step B33 also includes：
During step B332, conventional Defrost operation, the delivery temperature of compressor 01 or suction superheat are detected, judged
Whether the delivery temperature of the compressor 01 is less than setting value D1 (D1 is preferably 45~60 DEG C) or whether suction superheat is less than
Setting value (setting value is preferably 1~3 DEG C), if it is, being transferred to step B333；
Step B333, control the first control valve 35 are opened.
So, during defrosting, refrigerant enters regenerative heat exchanger 602 after the second restricting element 38 throttles, with accumulation of heat material
Compressor 01 is flowed back to after material heat exchange.Control as far as possible provide enough heat supply chamber inner sides and outdoor heat exchanger by this
Defrosting, it is to avoid shortage of heat and influence indoor comfortableness and outdoor heat exchanger to defrost.
Preferably, the step B33 also includes：
During step B334, conventional Defrost operation, the import of real-time detection outdoor environment temperature and outdoor heat exchanger 20
Whether temperature, judge the difference DELTA T2 between the outdoor environment temperature and the inlet temperature of outdoor heat exchanger 20 less than design temperature
During A7 (A7 is preferably 0~2 DEG C), if it is, being transferred to step B335；
Step B335, then control outdoor fan are out of service.
Outdoor fan being controlled in this way, making full use of outdoor environment heat to defrost, reduce defrosting time, reduction is removed
White energy resource consumption.
Preferably, the step B33 also includes：
Step B336, control the aperture of the first throttle element 30 to the first aperture L (L is preferably 150~350)；
Step B337, by after setting time Time4, being transferred to step B338；
Step B338, control the aperture of the first throttle element 30 to the second aperture M (preferably, L+50≤M≤L+
100), wherein, second aperture be more than first aperture.
This control mode, because the temperature of outdoor heat exchanger 20 is relatively low when defrosting starts, restricting element aperture is small to be conducive to
The holding of delivery temperature, but the top frost layer of outdoor heat exchanger 20 has been melted after Defrost operation certain hour, the invalid heat release of meeting,
Delivery temperature more high heat wastes more serious, by way of increasing refrigerant flow, that is, increased the heat for defrosting, and
The waste of heat is reduced, is conducive to the integrality of defrosting.
Preferably, also include before step B31：
If step B301, satisfaction enter the condition of Defrost operation, the low windscreen operation of control indoor fan；
Whether step B302, the temperature of real-time detection indoor heat exchanger 10, the temperature of indoor heat exchanger 10 that judgement is detected are small
In design temperature A8 (A8 is preferably 20~28 DEG C), if it is, being transferred to step B303；
Step B303, control indoor fan are out of service.
This kind of control can be prevented effectively from indoor fan operating and cause user's sense of discomfort, while it is outdoor that heat can be concentrated to remove
The frost of heat exchanger 20.Indoor heat exchanger 10 conducts heat by radiation direction room.
Preferably, also include before the step B31：
If B304, satisfaction enter the condition of Defrost operation, the frequency of compressor 01 is reduced, judge the frequency of compressor 01
Whether setpoint frequency (20-40HZ) is less than or equal to, if it is, being transferred to step B31, step B305 is transferred to if not；
Step B305, when judging pressure that high pressure sensor detects whether less than or equal to setting value (1-2MPa), such as
Fruit is to be transferred to step B31, and step B306 is transferred to if not；
Step B307, the reduction frequency of compressor 01.
Controlled by this, the noise produced when the first control valve 35 and four-way valve unlatching can be reduced, and prevent valve body in height
Damaged under pressure difference.
The control method of the air-conditioning device in the present embodiment, refrigerant leads to indoor heat exchanger simultaneously during due to special defrosting
10 and outdoor heat exchanger 20, indoor is had certain heat, there is no cold emission, user is comfortable；And, conventional defrosting is removed with special
When white, Defrost mode is transformed into using not shutting down, shortens defrosting time, improve heating load total in some cycles.
More preferably, the step B4 is specially：
Whether the temperature of the outdoor heat exchanger 20 that step B41, judgement are detected is more than or equal to outdoor environment temperature institute
Corresponding outdoor heat exchanger temperature M, if it is, the step B5 is transferred to, if not, being transferred to step B42；
Step B42, judge whether defrosting time reaches setting time Time2, if it is, being transferred to the step B5.
Fig. 5 show special defrosting to heating operation control flow chart, and Fig. 6 is that the corresponding defrosting of outdoor environment temperature starts
Temperature and special defrosting enter pipe temperature correction map.As shown in Figure 5,6, according to defrosting is exited the reason for, judge that next time enters defrosting
Mode and condition, i.e., in special Defrost operation, if defrosting after the completion of because the temperature of outdoor heat exchanger 20 reaches outdoor
The corresponding outdoor heat exchanger temperature M of environment temperature, then normal operation；If turned because defrosting time reaches setting time Time2
Enter the step B5, count 1 time, meanwhile, the M is increased Δ A (such as 1 DEG C)；Into before the step B31, judge tired
Whether product counts reach n times (n is preferably 2 times), if it is, being transferred to the B31, carries out conventional defrosting, and stored counts is clear
Zero.In order to save heat required during defrosting, by such control mode, modifying factor outside cause causes defrosting unclean,
The frost layer of outdoor heat exchanger 20 can be as far as possible removed, indoor heating amount is improved.
In Fig. 6, β lines represent the temperature correspondence line into defrosting when normally heating, and α represents revised and enters defrosting temperature
Correspondence line, it is preferable that β+1≤α≤β+5.
Fig. 7 show the system diagram of the air-conditioning device in the embodiment of the present invention two, and general structure is identical with embodiment one, no
It is that the first four-way valve 51 and the second four-way valve 52 are replaced with the first triple valve 61 and the second triple valve 62 respectively with part.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.
Claims (19)
1. a kind of control method of air-conditioning device, the air-conditioning device includes compressor, reversal valve, outdoor heat exchanger, first segment
Fluid element and indoor heat exchanger, it is characterised in that the reversal valve includes the first reversal valve and the second reversal valve parallel with one another,
The first interface of the first reversal valve and the second reversal valve is connected with the exhaust outlet of the compressor, and the first reversal valve and second commutates
The second interface of valve is connected with the air entry of compressor, and the 3rd interface of the first reversal valve is connected with the indoor heat exchanger, the
3rd interface of two reversal valves is connected with the outdoor heat exchanger；The air-conditioning device also includes that the second restricting element, accumulation of heat are filled
Put, the first control valve and the second control valve, the regenerative apparatus includes being used for accumulating heat-storing material and the utilization of compressor used heat
The accumulation of heat of the heat-storing material carries out the regenerative heat exchanger of heat exchange, and one end of the regenerative heat exchanger is connected by the second restricting element
It is connected on the pipeline between the first throttle element and the indoor heat exchanger, the other end is through the first control valve and compression
The air entry connection of machine, described second control valve one end is connected to the pipe between the regenerative heat exchanger and the first control valve
On road, the other end is connected with compressor increasing enthalpy mouthful, and the control method includes：
When starting refrigeration and heating operation, the first control valve and the second control valve is controlled to close；
In refrigeration and heating process, the outdoor environment temperature is detected, sentenced according to the outdoor environment temperature for detecting
It is disconnected whether to need increasing enthalpy, and according to the opening and closing of judged result control the second control valve.
2. control method according to claim 1, it is characterised in that the control method also includes：
In refrigeration and heating process, the temperature of the regenerative apparatus is detected, according to the temperature of the regenerative apparatus for detecting
The opening and closing of degree control the first control valve.
3. control method according to claim 2, it is characterised in that the control method includes：
S1, whether the regenerative apparatus temperature is judged more than or equal to design temperature A3, if it is, step S2 is transferred to, if
It is no, then it is transferred to step S4；
S2, judge whether to need increasing enthalpy according to the outdoor environment temperature, if it is, step S3 is transferred to, if it is not, then being transferred to
Step S5；
S3, control the second control valve are opened, into increasing enthalpy operation；
S4, judge whether to need increasing enthalpy according to the outdoor environment temperature, if it is, the step S3 is transferred to, if not, turning
Enter step S5；
S5, control the first control valve are opened, and judge whether the regenerative apparatus temperature is less than or equal to design temperature A1, such as
Fruit is to control the first control valve to close.
4. control method according to claim 3, it is characterised in that judged whether to need increasing enthalpy according to outdoor environment temperature
The step of include：
During refrigerating operaton, if the environment temperature is more than or equal to design temperature C1, increasing enthalpy is needed；
During heating operation, if the environment temperature is less than or equal to design temperature C2, increasing enthalpy is needed.
5. control method according to claim 3, it is characterised in that the step S1 also includes：Judge the accumulation of heat dress
Whether temperature is put more than or equal to design temperature A4, if it is, control the compressor to close, wherein A4 ＞ A3.
6. control method according to claim 3, it is characterised in that the step S5 also includes：Control first control
Valve processed reduces the throttle degree of the first throttle element while opening.
7. control method as claimed in any of claims 1 to 6, it is characterised in that the control method also includes
Following steps：
In B1, heating process, the indoor heat exchanger temperature, the outdoor heat exchanger inlet temperature, outdoor environment are detected
Temperature and continuous heating run time；
The indoor heat exchanger temperature and/or the outdoor heat exchanger inlet temperature and outdoor environment temperature that B2, basis are detected
Degree and/or continuous heating run time, judge whether to meet the condition for entering Defrost operation, if it is, being transferred to step B3；
B3, into Defrost operation；
During B4, Defrost operation, the outdoor heat exchanger temperature, outdoor environment temperature and defrosting time are detected, according to detection
The outdoor heat exchanger temperature and outdoor environment temperature and/or defrosting time for arriving, judge whether to meet the condition for exiting defrosting,
If it is, being transferred to step B5；
B5, exit Defrost operation.
8. control method according to claim 7, it is characterised in that the step B2 is specially：
B21, when continuous heating run time reaches setting time Time1, judge the indoor heat exchanger that real-time detection is arrived
Whether the difference △ T1 between temperature and previously detected indoor heat exchanger maximum temperature are more than or equal to design temperature A5, such as
Fruit is then to be transferred to the step B3, if it is not, then being transferred to B22；
The outdoor heat exchanger inlet temperature that B22, judgement are detected and the room corresponding to the outdoor environment temperature at that time
Whether the difference △ T2 between external heat exchanger temperature are more than or equal to design temperature A6, if it is, the step B3 is transferred to, such as
It is really no, then it is transferred to step B23；
B23, judge whether continuous heating run time reaches setting time Time3, if it is, the step B3 is transferred to, such as
Fruit is otherwise transferred to the B21, wherein Time3 ＞ Time1.
9. control method according to claim 7, it is characterised in that the step B3 includes：
B31, the detection regenerative apparatus temperature, judge it is to enter special defrosting fortune according to the regenerative apparatus temperature for detecting
Row still enters conventional Defrost operation, if into special Defrost operation, being then transferred to step B32, if being removed into conventional
Frost operation, then be transferred to step B33；
B32, control second reversal valve go to refrigeration direction, control the first control valve to open, and then control the pressure
Contracting unit frequency rises to defrosting frequency, carries out special defrosting；
B33, control first reversal valve and second reversal valve switch to direction of freezing, and then control the compressor frequency
Defrosting frequency is risen to, conventional defrosting is carried out.
10. control method according to claim 9, it is characterised in that the step B31 is specially：
Whether the regenerative apparatus temperature is judged more than or equal to design temperature A2, if it is, into special Defrost operation, such as
It is really no, then into conventional Defrost operation.
11. control methods according to claim 9, it is characterised in that the step B32 also includes：
During special Defrost operation, the aperture of the first throttle element is controlled to the first aperture, by setting time Time4
Afterwards, the aperture of the first throttle element is controlled to the second aperture, wherein, second aperture is more than first aperture.
12. control methods according to claim 9, it is characterised in that the step B32 also includes：
During special Defrost operation, real-time detection outdoor environment temperature and the outdoor heat exchanger inlet temperature judge detection
Whether the difference △ T3 between the outdoor environment temperature for arriving and the outdoor heat exchanger inlet temperature are less than design temperature A7,
If it is, control outdoor fan is out of service.
13. control methods according to claim 9, it is characterised in that the step B33 also includes：
During conventional Defrost operation, the compressor exhaust temperature or suction superheat, the pressure that judgement is detected are detected
Whether whether contracting machine delivery temperature be less than setting value less than setting value or suction superheat, if it is, control described first
Control valve is opened.
14. control methods according to claim 9, it is characterised in that the step B33 also includes：
During conventional Defrost operation, the inlet temperature of real-time detection outdoor environment temperature and outdoor heat exchanger judges to detect
The outdoor environment temperature and outdoor heat exchanger inlet temperature between difference △ T2 whether less than design temperature A7 when, if
It is then to control outdoor fan out of service.
15. control methods according to claim 9, it is characterised in that the step B33 also includes：
The aperture of the first throttle element is controlled to the first aperture, by after setting time Time4, controlling the first throttle
The aperture of element to the second aperture, wherein, second aperture be more than first aperture.
16. control methods according to claim 9, it is characterised in that also include before the step 31：
The compressor frequency is reduced, when compressor frequency is reduced to setpoint frequency, or the pressure that high pressure sensor is detected
When power is less than setting value, the step B31 is transferred to.
17. control methods according to claim 9, it is characterised in that also include before the step B31：
The low windscreen operation of control indoor fan, real-time detection indoor heat exchanger temperature, the indoor heat exchanger temperature that judgement is detected
Whether design temperature A8 is less than, if it is, control indoor fan is out of service.
18. control methods according to claim 9, it is characterised in that the step B4 is specially：
Whether the outdoor heat exchanger temperature that judgement is detected is more than or equal to the outdoor heat exchange corresponding to outdoor environment temperature
Device temperature M, if it is, the step B5 is transferred to, if not, judge whether defrosting time reaches setting time Time2, if
It is then to be transferred to the step B5.
19. control methods according to claim 18, it is characterised in that during special Defrost operation, if because of defrosting time
Reach setting time Time2 and be transferred to the step B5, count 1 time, meanwhile, the M is increased △ A；Into the step B31
Before, judge whether stored counts reaches n times, if it is, being transferred to the B33, and stored counts is reset.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104976715B (en) * | 2015-06-02 | 2017-12-22 | 珠海格力电器股份有限公司 | Air-conditioning system and its control method |
| CN105135628B (en) * | 2015-09-28 | 2019-03-01 | Tcl空调器(中山)有限公司 | The defrosting control method of air conditioner and air conditioner |
| CN106369877A (en) * | 2016-11-30 | 2017-02-01 | 广东美的制冷设备有限公司 | Heat pump system and defrosting control method thereof |
| CN106871296B (en) * | 2017-03-27 | 2019-07-02 | 广东美的制冷设备有限公司 | A kind of capacity-variable air conditioner system and air conditioner |
| CN107036348A (en) * | 2017-05-17 | 2017-08-11 | 广东美的制冷设备有限公司 | Air conditioner, the defrosting control method of air conditioner and system |
| CN114110936A (en) * | 2017-08-31 | 2022-03-01 | 广东美的制冷设备有限公司 | Air conditioner and energy efficiency calculation method thereof |
| CN109595770B (en) * | 2018-12-07 | 2021-07-02 | 广东Tcl智能暖通设备有限公司 | Air conditioner, system and control method thereof, and computer readable storage medium |
| CN111121229B (en) * | 2019-12-18 | 2022-02-01 | 宁波奥克斯电气股份有限公司 | Control method and control device of air conditioner, heat dissipation structure and air conditioner |
| CN111174388B (en) * | 2020-01-03 | 2020-12-15 | 珠海格力电器股份有限公司 | Operation control method and device, storage medium and multi-split system |
| CN115420028B (en) * | 2021-06-01 | 2024-02-06 | 广东美的暖通设备有限公司 | Multi-split system and control method thereof |
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