CN104634008A - Control method for air conditioner - Google Patents
Control method for air conditioner Download PDFInfo
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- CN104634008A CN104634008A CN201310567361.XA CN201310567361A CN104634008A CN 104634008 A CN104634008 A CN 104634008A CN 201310567361 A CN201310567361 A CN 201310567361A CN 104634008 A CN104634008 A CN 104634008A
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- temperature
- control
- heat exchanger
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- outdoor
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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
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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
- F24F11/62—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
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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
- F24F11/70—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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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
- F24F11/62—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
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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
- F24F11/70—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses a control method for an air conditioner. One end of a heat storing heat exchanger of a heat storing device is connected to a pipeline between a first throttling element and an indoor heat exchanger through a second throttling element, and the other end of the heat storing heat exchanger of the heat storing device is connected with an air sucking opening of a compressor through a first control valve. One end of a second control valve is connected to a pipeline between the heat storing heat exchanger and the first control valve, and the other end of the second control valve is connected with an enthalpy increasing opening of the compressor. The control method includes the steps that when refrigerating and heating operation begins, the first control valve and the second control valve are controlled to be closed; in the refrigerating and heating operation process, the outdoor environment temperature is detected, whether entropy increasing is needed or not is judged according to the detected outdoor environment temperature, and the second control valve is controlled to be opened and closed according to a judgment result. According to the control method for the air conditioner, the heat storing device can be used for defrosting and can also be used in the normal refrigerating and heating process, the refrigerating capacity in the refrigerating mode and the heating capacity and the energy efficiency in the heating mode are increased, and the utilization rate of the heat storing device is increased.
Description
Technical field
The present invention relates to field of air conditioning, particularly relate to a kind of control method of aircondition.
Background technology
Heat pump type air conditioner is when low temperature heating operates, and outdoor heat exchanger surface can form frost layer, in order to not affect heating effect, usually the Defrost mode adopted at present is that pattern is transferred to refrigeration mode, this kind of Defrost mode to indoor radiation cold, can cause fluctuations in indoor temperature large, affects comfortableness.
In order to head it off, the measure adopted in current industry installs regenerative apparatus around compressor of outdoor unit, utilizes regenerative apparatus to accumulate the defrosting of compressor used heat.Although this mode can realize indoor in the process of defrosting certain input heat, amount of stored heat also has good utilization, but indoor heating capacity does not significantly improve when normally heating, particularly more remarkable at low temperatures, and for refrigerating state and the higher heating operation of temperature, regenerative apparatus does not open effect, and therefore regenerative apparatus utilization ratio is low.
Summary of the invention
For above-mentioned prior art present situation, technical problem to be solved by this invention is, provides a kind of control method of aircondition, makes regenerative apparatus when normally freezing and heat lower use, increase the heating capacity under the refrigerating capacity and heating mode of freezing, improve regenerative apparatus utilization rate.
In order to solve the problems of the technologies described above, the control method of a kind of aircondition provided by the present invention, described aircondition comprises compressor, reversal valve, outdoor heat exchanger, first throttle element and indoor heat exchanger, described reversal valve comprises the first reversal valve parallel with one another and the second reversal valve, first reversal valve is connected with the exhaust outlet of described compressor with the first interface of the second reversal valve, first reversal valve is connected with the air entry of compressor with the second interface of the second reversal valve, 3rd interface of the first reversal valve is connected with described indoor heat exchanger, 3rd interface of the second reversal valve is connected with described outdoor heat exchanger, described aircondition also comprises second section fluid element, regenerative apparatus, first control valve and the second control valve, described regenerative apparatus comprises the heat-storing material for accumulating compressor used heat and utilizes the accumulation of heat of this heat-storing material to carry out the regenerative heat exchanger of heat exchange, one end of described regenerative heat exchanger is connected on the pipeline between described first throttle element and described indoor heat exchanger by second section fluid element, the other end is connected through the air entry of the first control valve with described compressor, described second control valve one end is connected on the pipeline between described regenerative heat exchanger and described first control valve, the other end and compressor increase enthalpy mouth and are connected, described control method comprises:
When starting refrigeration and heating operation, control described first control valve and described second control valve closedown;
Freeze and in heating process, detect described outdoor environment temperature, judging whether to need to increase enthalpy according to the described outdoor environment temperature detected, and control the opening and closing of described second control valve according to judged result.
Wherein in an embodiment, described control method also comprises:
Freeze and in heating process, detect described regenerative apparatus temperature, controlling the opening and closing of described first control valve according to the described regenerative apparatus temperature detected.
Wherein in an embodiment, described control method comprises:
S1, judge whether described regenerative apparatus temperature is more than or equal to design temperature A3, if so, then proceeds to step S2, if not, then proceeds to step S4;
S2, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to step S3, if not, then proceed to step S5;
S3, control described second control valve and open, enter and increase enthalpy and run;
S4, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to described step S3, if not, proceed to step S5;
S5, control described first control valve and open, judge whether described regenerative apparatus temperature is less than or equal to design temperature A1, if so, control described first control valve and close.
Wherein in an embodiment, judge whether that the step needing to increase enthalpy comprises according to outdoor environment temperature:
During refrigerating operaton, if described environment temperature is more than or equal to design temperature C1, then need to increase enthalpy;
During heating operation, if described environment temperature is less than or equal to design temperature C2, then need to increase enthalpy.
Wherein in an embodiment, described step S1 also comprises: judge whether described regenerative apparatus temperature is more than or equal to design temperature A4, if so, then controls described compressor and closes, wherein A4>A3.
Wherein in an embodiment, described step S5 also comprises: control the throttle degree reducing described first throttle element while described first control valve is opened.
Wherein in an embodiment, described control method also comprises the steps:
In B1, heating process, detect described indoor heat exchanger temperature, described outdoor heat exchanger inlet temperature, outdoor environment temperature and continuous heating running time;
B2, according to the described indoor heat exchanger temperature that detects and/or described outdoor heat exchanger inlet temperature and outdoor environment temperature and/or continuous heating running time, judge whether to meet the condition entering Defrost operation, if so, then proceed to step B3;
B3, enter Defrost operation;
In B4, Defrost operation process, detect described outdoor heat exchange actuator temperature, outdoor environment temperature and defrosting time, according to the described outdoor heat exchange actuator temperature detected and outdoor environment temperature and/or defrosting time, judge whether to meet the condition exiting defrosting, if so, then step B5 is proceeded to;
B5, exit Defrost operation.
Wherein in an embodiment, described step B2 is specially:
B21, when continuous heating reaches setting-up time Time1 running time, whether the difference DELTA T1 between the described indoor heat exchanger temperature that judgement detects in real time and the indoor heat exchanger maximum temperature detected above is more than or equal to design temperature A5, if, then proceed to described step B3, if not, then B22 is proceeded to;
Whether the difference DELTA T2 between the described outdoor heat exchanger inlet temperature that B22, judgement detect and the outdoor heat exchange actuator temperature corresponding to described outdoor environment temperature is at that time more than or equal to design temperature A6, if, then proceed to described step B3, if not, then proceed to step B23;
B23, judge whether continuous heating reaches setting-up time Time3 running time, if so, then proceed to described step B3, if otherwise proceed to described B21, wherein Time3>Time1.
Wherein in an embodiment, described step B3 comprises:
B31, detect described regenerative apparatus temperature, judge enter special Defrost operation or enter conventional Defrost operation according to the described regenerative apparatus temperature detected, if enter special Defrost operation, then proceed to step B32, if enter conventional Defrost operation, then proceed to step B33;
B32, control described second reversal valve go to refrigeration direction, control described first control valve open, then control described compressor frequency and rise to defrosting frequency, carry out special defrosting;
B33, control described first reversal valve and described second reversal valve and transfer refrigeration direction to, then control described compressor frequency and rise to defrosting frequency, carry out routine and defrost.
Wherein in an embodiment, described step B31 is specially:
Judge whether described regenerative apparatus temperature is more than or equal to design temperature A2, if so, then enter special Defrost operation, if not, then enter conventional Defrost operation.
Wherein in an embodiment, described step B32 also comprises:
In special Defrost operation process, control aperture to the first aperture of described first throttle element, after setting-up time Time4, control aperture to the second aperture of described first throttle element, wherein, described second aperture is greater than described first aperture.
Wherein in an embodiment, described step B32 also comprises:
In special Defrost operation process, real-time detection outdoor environment temperature and described outdoor heat exchanger inlet temperature, whether the difference DELTA T3 between the described outdoor environment temperature that judgement detects and described outdoor heat exchanger inlet temperature is less than design temperature A7, if so, then outdoor fan is controlled out of service.
Wherein in an embodiment, described step B33 also comprises:
In conventional Defrost operation process, detect described compressor exhaust temperature or suction superheat, judge whether whether the described compressor exhaust temperature detected be less than setting value lower than setting value or suction superheat, if so, then control described first control valve and open.
Wherein in an embodiment, described step B33 also comprises:
In conventional Defrost operation process, the inlet temperature of real-time detection outdoor environment temperature and outdoor heat exchanger, when whether the difference DELTA T2 between the described outdoor environment temperature that judgement detects and outdoor heat exchanger inlet temperature is less than design temperature A7, if so, then outdoor fan is controlled out of service.
Wherein in an embodiment, described step B33 also comprises:
Control aperture to the first aperture of described first throttle element, after setting-up time Time4, control aperture to the second aperture of described first throttle element, wherein, described second aperture is greater than described first aperture.
Wherein in an embodiment, also comprise before described step 31:
Reduce described compressor frequency, when compressor frequency is reduced to setpoint frequency, or when the pressure that detects of high pressure sensor is less than setting value, proceed to described step B31.
Wherein in an embodiment, also comprise before described step B31:
Inner blower low windscreen in control room runs, heat exchange temperature in real-time sensing chamber, judges whether the indoor heat exchanger temperature detected is less than design temperature A8, and if so, control room inner blower is out of service.
Wherein in an embodiment, described step B4 is specially:
Judge whether the described outdoor heat exchange actuator temperature detected is more than or equal to the outdoor heat exchange actuator temperature M corresponding to outdoor environment temperature, if so, then proceeds to described step B5, if not, judge whether defrosting time reaches setting-up time Time2, if so, then proceed to described step B5.
Wherein in an embodiment, during special Defrost operation, if proceed to described step B5 because defrosting time reaches setting-up time Time2, count 1 time, meanwhile, make described M increase Δ A; Before entering described step B31, judge whether stored counts reaches n time, if so, proceed to described B33, and stored counts is reset.
Compared with prior art, the control method of aircondition of the present invention, judge whether to need to increase enthalpy by detecting described outdoor environment temperature, the opening and closing of the second control valve are controlled according to judged result, make regenerative apparatus both may be used for defrosting, during improving defrosting, the comfortableness of user, is normally freezing and is heating lower use again, add the refrigerating capacity under refrigeration mode and the heating capacity under heating mode and efficiency, improve the utilization rate of regenerative apparatus.
The beneficial effect that additional technical feature of the present invention has will be set forth in specific embodiment of the invention part.
Accompanying drawing explanation
Fig. 1 is the system diagram of the aircondition in the embodiment of the present invention one;
Fig. 2 is the control flow chart of the refrigerating operaton of aircondition shown in Fig. 1;
The heating operation of Fig. 3 for aircondition shown in Fig. 1 and the control flow chart of Defrost operation;
The control flow chart that the heating and defrosting that Fig. 4 is aircondition shown in Fig. 1 runs;
The special defrosting that Fig. 5 is aircondition shown in Fig. 1 is to the control flow chart of heating operation;
Fig. 6 starts temperature for defrosting that the outdoor environment temperature of aircondition shown in Fig. 1 is corresponding and special defrosting enters pipe temperature correction figure;
The regenerative apparatus protecting control skeleton diagram based on regenerative apparatus temperature that Fig. 7 is aircondition shown in Fig. 1;
Fig. 8 is the system diagram of the aircondition in the embodiment of the present invention two.
Above in each figure, 01-compressor; 10-indoor heat exchanger; 20-outdoor heat exchanger; 35-first control valve; 38-second section fluid element; 32-second control valve; 30-first throttle element; 51-first cross valve; 52-second cross valve; 60-regenerative apparatus; 601-heat storage tank; 602-regenerative heat exchanger; 61-first triple valve; 62-second triple valve; 71-first check valve; 81-second check valve; 40-outdoor environment temperature checkout gear; 50-outdoor heat exchanger temperature-detecting device; 70-regenerative apparatus temperature-detecting device; 80-indoor environment temperature checkout gear; 90-indoor heat exchanger temperature-detecting device.
Detailed description of the invention
And the present invention is described in detail in conjunction with the embodiments below with reference to the accompanying drawings.It should be noted that, when not conflicting, the feature in following embodiment and embodiment can combine mutually.
Figure 1 shows that the system diagram of the aircondition in the embodiment of the present invention one, as shown in Figure 1, aircondition comprises Dual-level enthalpy adding compressor 01, first cross valve 51, second cross valve 52, outdoor heat exchanger 20, first throttle element 30, indoor heat exchanger 10, for detecting the outdoor environment temperature checkout gear 40 of outdoor environment temperature, for the outdoor heat exchanger temperature-detecting device 50 of sensing chamber's external heat exchanger temperature, for detecting the regenerative apparatus temperature-detecting device 70 of regenerative apparatus temperature, for detecting the indoor environment temperature checkout gear 70 of indoor environment temperature, for detecting the indoor environment temperature checkout gear 80 of indoor environment temperature and the indoor heat exchanger temperature-detecting device 90 for heat exchange temperature in sensing chamber, wherein, first cross valve 51 is connected with the exhaust outlet of compressor 01 with the first interface of the second cross valve 52, first cross valve 51 is all connected with the air entry of compressor 01 with the second interface of the second cross valve 52, 3rd interface of the first cross valve 5161 is connected with indoor heat exchanger 10, and the 3rd interface of the second cross valve 52 is connected with outdoor heat exchanger 20.Described aircondition also comprises second section fluid element 38, regenerative apparatus 60, first control valve 35 and the second control valve 32, described regenerative apparatus 60 comprises the heat-storing material being positioned at heat storage tank 601 for accumulating compressor 01 used heat and utilizes the accumulation of heat of this heat-storing material to carry out the regenerative heat exchanger 602 of heat exchange, one end of described regenerative heat exchanger 602 is connected on the pipeline between described first throttle element 30 and described indoor heat exchanger 10 by second section fluid element 38, the other end is connected through the air entry of the first control valve 35 with described compressor 01, described second control valve 32 one end is connected on the pipeline between described regenerative heat exchanger 602 and described first control valve 35 through tube connector, the other end increases enthalpy mouth through tube connector and compressor 01 and is connected.First control valve 35 and the second control valve 32 are preferably magnetic valve.
Figure 2 shows that the control flow chart of the refrigerating operaton of the aircondition of the present embodiment, Figure 3 shows that the heating operation of the aircondition in the present embodiment is to control flow chart during defrosting.As shown in Figure 2,3, the aircondition control method in the present embodiment comprises the steps:
Step S0, when starting refrigeration and heating operation, control described first control valve 35 and described second control valve 32 is closed.
As shown in Figure 1, during refrigeration, cold-producing medium is through compressor 01, be delivered to split point 0 point, cold-producing medium is shunted at 0 Nodes, and a part of fluid flows into the first cross valve 51 through refrigerant pipe 222, after to flow to B place in circular chart through the second check valve 81 along refrigerant arm 204; A part flows through refrigerant arm 221 and flows into the second cross valve 52 in addition, and two parts fluid confluxes at Node B point place, in outdoor heat exchanger 20, carry out condensing heat-exchange.Cold-producing medium is again through first throttle element 30 reducing pressure by regulating flow, indoor heat exchanger 10 is arrived by refrigerant pipe 201 after reducing pressure by regulating flow, evaporation and heat-exchange is carried out in indoor heat exchanger 10, heat inside absorption chamber, reduce the temperature of indoor, cold-producing medium is heated to form saturated or superheat state, through refrigerant arm 223, first cross valve 51, refrigerant pipe 230 get back to compressor 01 air entry end, complete a complete kind of refrigeration cycle.
When heating, compressor 01 pumps into refrigerant pipe 222 and 221 high temperature and high pressure gaseous refrigerant, arrive the first cross valve 51 and the second cross valve 52 respectively, cold-producing medium through the second cross valve 52 flows into refrigerant pipe 207 through the first check valve 71, converge at A point with the cold-producing medium through the first cross valve 51, after in the condensation heat release of indoor heat exchanger 10 place, carry out forced-convection heat transfer herein, achieve and heat of high temperature is passed to indoor, promote the effect of indoor temperature.Cold-producing medium arrives in outdoor heat exchanger 20 through first throttle element 30 and carries out heat absorption evaporation process, absorbs the heat of air herein.Cold-producing medium is heated to form saturated or oversaturated cold-producing medium, with after get back to compressor 01 air entry through refrigerant pipe 220, refrigerant pipe 230, complete one and complete heat circulation.
While refrigeration and heating operation, the heat that the spontaneous collection of regenerative apparatus 60 meeting is distributed from compressor 01 periphery.
Step S1, judge whether described regenerative apparatus 60 temperature is more than or equal to design temperature A3, if so, then proceeds to step S2, if not, then proceeds to step S4.
Step S2, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to step S3, if not, then proceed to step S5.Preferably, judge whether that the step needing to increase enthalpy comprises according to outdoor environment temperature: during refrigerating operaton, if described environment temperature is more than or equal to design temperature C1, then need to increase enthalpy; During heating operation, if described environment temperature is less than or equal to design temperature C2, then need to increase enthalpy.C1 is preferably 22 ~ 32 DEG C, and C2 is preferably 5 ~ 15 DEG C.
Step S3, control described second control valve 32 and open, enter and increase enthalpy and run.
As shown in Figure 1, during refrigerating operaton, when the second control valve 32 is opened, a gas-liquid two-phase refrigerant branches part after throttling enters further reducing pressure by regulating flow in second section fluid element 38 through refrigerant pipe 101, rear cold-producing medium flows in regenerative apparatus 60 heat absorbing heat-storing material and absorb, and make the cold-producing medium through regenerative apparatus 60 reach oversaturated state, rear inflow secondary increases enthalpy air entry, realize opening while refrigeration increasing enthalpy process, improve the cold medium flux getting back to compressor 01.When the higher refrigeration of outdoor temperature, delivery temperature is higher, and compressor 01 load is higher, now opens enthalpy-increasing function, has both reduced regenerative apparatus 60 temperature, again reduces compressor 01 load, improves the efficiency of complete machine.When the lower refrigeration of outdoor temperature, lowered the temperature to regenerative apparatus 60 by bypass one road cold-producing medium, refrigerant flow does not reduce simultaneously, avoids heat accumulation function to lose efficacy.
During heating operation, when the second control valve 32 is opened, reducing pressure by regulating flow in second section fluid element 38 is entered through refrigerant pipe 101 through a condensed gas-liquid two-phase refrigerant branches part, rear cold-producing medium flows in regenerative apparatus 60 heat absorbing heat-storing material and absorb, the cold-producing medium through regenerative apparatus 60 is made to reach oversaturated state, rear inflow secondary increases enthalpy air entry, realizes opening while heating increasing enthalpy process.When outdoor temperature is lower heat time, open and increase enthalpy loop, the circulating mass of refrigerant now heated increases, the corresponding increase of heating capacity, and simultaneously regenerative apparatus 60 temperature also can not be too high, avoids Problem of Failure.Outdoor temperature is higher heat time, lowered the temperature to regenerative apparatus 60 by bypass one road cold-producing medium, avoid regenerative apparatus 60 to lose efficacy.
Step S4, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to described step S3, proceed to step S5 if not.
Step S5, control described first control valve 35 and open, judge whether described regenerative apparatus 60 temperature is less than or equal to design temperature A1, if so, control described first control valve 35 and close.By this control mode, can ensure that regenerative apparatus 60 is under normally freezing and heating state, temperature does not go bad in rational scope, and transition is evaporated, and ensures the reliability of its function.The size of A1, A3 is determined by the character of heat-storing material, and in the present embodiment, A3 value is 70 ~ 90 DEG C, and the span of A1 is 50 ~ 60 DEG C.
The control method of the aircondition in the present embodiment, reduces the risk that regenerative apparatus 60 lost efficacy because temperature is too high.And regenerative apparatus 60 both may be used for defrosting, the comfortableness of user during improving defrosting, was normally freezing and was heating lower use again, added refrigerating capacity under refrigeration, heating mode and heating capacity and efficiency.According to control method of the present invention, reasonably can judge that unit enters the time of defrosting, and enter the loss of the rear limited heat of defrosting, use extraneous heat defrosting as much as possible, and ensure the completeness of defrosting.
Further, described step S1 also comprises: judge whether described regenerative apparatus 60 temperature is more than or equal to design temperature A4, if so, then controls described compressor 01 and closes, wherein A4>A3.If regenerative apparatus 60 constant temperature raises reach A4, compressor 01 is out of service, thus reaches the object of reliably protecting regenerative apparatus 60.In the present embodiment, A4 span is 75 ~ 95 DEG C.
Further, described step S5 also comprises: control the throttle degree reducing described first throttle element 30 while described first control valve 35 is opened, refrigerant flow is not reduced.
Figure 3 shows that the heating operation of aircondition and the control flow chart of Defrost operation, as shown in Figure 3, the control method of aircondition also comprises:
Step B1, detect described indoor heat exchanger 10 temperature, described outdoor heat exchanger 20 inlet temperature, outdoor environment temperature and continuous heating running time;
Step B2, according to described indoor heat exchanger 10 temperature and/or described outdoor heat exchanger 20 inlet temperature and outdoor environment temperature and/or continuous heating running time, judge whether to meet the condition entering Defrost operation, if so, then proceed to step B3.
More preferably, described step B2 is specially:
Step B21, when continuous heating reaches setting-up time Time1 running time, whether the difference DELTA T1 between described indoor heat exchanger 10 temperature that judgement detects in real time and indoor heat exchanger 10 maximum temperature detected above is more than or equal to design temperature A5 (A5 is preferably 3 ~ 10 DEG C), if, then proceed to described step B3, if not, then B22 is proceeded to;
Whether the difference DELTA T2 between described outdoor heat exchanger 20 inlet temperature that step B22, judgement detect and outdoor heat exchanger 20 temperature corresponding to described outdoor environment temperature is at that time more than or equal to design temperature A6 (A6 is preferably-25 ~ 1 DEG C), if, then proceed to described step B3, if not, then step B23 is proceeded to;
Step B23, judge whether continuous heating reaches setting-up time Time3 running time, if so, then proceed to described step B3, if otherwise proceed to described B21, wherein Time3>Time1.
The present embodiment adopts three condition judgment whether to enter Defrost operation, effectively can judge outdoor heat exchanger 20 frosting degree, and three condition complementations, avoid certain condition and lost efficacy or occurred deviation and cause frosting seriously and not to defrost phenomenon, affect heating effect.
Step B3, enter Defrost operation.
In step B4, Defrost operation process, detect described outdoor heat exchanger 20 temperature, outdoor environment temperature and defrosting time, according to described outdoor heat exchanger 20 temperature detected and outdoor environment temperature and/or defrosting time, judge whether to meet the condition exiting defrosting, if so, then step B5 is proceeded to.
Step B5, exit Defrost operation.
Figure 5 shows that the control flow chart of the Defrost operation of the aircondition in the present embodiment.As shown in Figure 5, defrosting control method comprises:
Step B31, detect described regenerative apparatus 60 temperature, judge enter special Defrost operation or enter conventional Defrost operation according to described regenerative apparatus 60 temperature detected, if enter special Defrost operation, then proceed to step B32, if enter conventional Defrost operation, then proceed to step B33.
More preferably, described step B31 is specially: judge whether described regenerative apparatus 60 temperature is more than or equal to design temperature A2, if, proceed to step B32, then enter special Defrost operation, if not, proceed to step B33, then enter conventional Defrost operation, wherein A2<A1<A3.Can provide inside enough heat supply chambers as much as possible by this control and outdoor heat exchanger defrosting, avoid shortage of heat and affect indoor comfortableness and outdoor heat exchanger defrosting.The span of the design temperature A2 in the present embodiment is 25 ~ 35 DEG C.
B32, control described second reversal valve go to refrigeration direction, control described first control valve 35 and open, then control described compressor 01 frequency and rise to defrosting frequency, carry out special defrosting.
See Fig. 1, during special Defrost operation, first cross valve 51 does not commutate, high-temperature high-pressure refrigerant is discharged from compressor 01 exhaust outlet, part of refrigerant is through the first cross valve 51, enter indoor heat exchanger 10, with room air heat exchange, another part cold-producing medium enters outdoor heat exchanger 20 through the second cross valve 52, after outdoor air heat exchange, through first throttle element 30, converge at C point with the cold-producing medium through indoor heat exchanger 10, then after second section fluid element 38 and regenerative apparatus 60, flow back to compressor 01 air entry.
Preferably, described step B32 also comprises:
Step B322, control aperture to the first aperture L1 (L1 is preferably 150 ~ 350) of described first throttle element 30;
Step B323, after setting-up time Time4, proceed to step B326;
Step B326, control aperture to the second aperture L2 of described first throttle element 30, wherein, described second aperture is greater than described first aperture.Preferably, L1+50≤L2≤L1+100.
Preferably, described step B32 also comprises:
In B324, special Defrost operation process, real-time detection outdoor environment temperature and described outdoor heat exchanger 20 inlet temperature, when whether the difference DELTA T3 between the described outdoor environment temperature that judgement detects and described outdoor heat exchanger 20 inlet temperature is less than design temperature A7 (A7 is preferably 0 ~ 2 DEG C), if so, step B325 is proceeded to;
Step B325, control outdoor fan are out of service.
Control outdoor fan in this way, make full use of the defrosting of outdoor environment heat, reduce defrosting time, reduce defrosting energy resource consumption.
B33, control described first cross valve 51 and described second cross valve 52 and transfer refrigeration direction to, then control described compressor 01 frequency and rise to defrosting frequency, carry out routine and defrost.Conventional defrosting and refrigerating operaton, do not repeat them here.
Preferably, described step B33 also comprises:
In step B332, conventional Defrost operation process, detect described compressor 01 delivery temperature or suction superheat, judge whether whether described compressor 01 delivery temperature be less than setting value (this setting value is preferably 1 ~ 3 DEG C) lower than setting value D1 (D1 is preferably 45 ~ 60 DEG C) or suction superheat, if so, step B333 is proceeded to;
Step B333, control described first control valve 35 and open.
Like this, during defrosting, cold-producing medium enters regenerative heat exchanger 602 after second section fluid element 38 throttling, flows back to compressor 01 with after heat-storing material heat exchange.Can provide inside enough heat supply chambers as much as possible by this control and outdoor heat exchanger defrosting, avoid shortage of heat and affect indoor comfortableness and outdoor heat exchanger defrosting.
Preferably, described step B33 also comprises:
In step B334, conventional Defrost operation process, the inlet temperature of real-time detection outdoor environment temperature and outdoor heat exchanger 20, when whether the difference DELTA T2 judging between described outdoor environment temperature and outdoor heat exchanger 20 inlet temperature is less than design temperature A7 (A7 is preferably 0 ~ 2 DEG C), if so, then step B335 is proceeded to;
Step B335, then control outdoor fan out of service.
Control outdoor fan in this way, make full use of the defrosting of outdoor environment heat, reduce defrosting time, reduce defrosting energy resource consumption.
Preferably, described step B33 also comprises:
Step B336, control aperture to the first aperture L (L is preferably 150 ~ 350) of described first throttle element 30;
Step B337, after setting-up time Time4, proceed to step B338;
Step B338, control aperture to the second aperture M (preferably, L+50≤M≤L+100) of described first throttle element 30, wherein, described second aperture is greater than described first aperture.
This control mode, because outdoor heat exchanger 20 temperature is lower when defrosting starts, the little maintenance being conducive to delivery temperature of restricting element aperture, but when after Defrost operation certain hour, outdoor heat exchanger 20 top frost layer is melted, the invalid heat release of meeting, more high heat waste is more serious for delivery temperature, by increasing the mode of refrigerant flow, namely adding the heat for defrosting, again reducing the waste of heat, be conducive to the integrality defrosted.
Preferably, also comprise before step B31:
If step B301 meets the condition entering Defrost operation, inner blower low windscreen in control room runs;
Step B302, in real time detection indoor heat exchanger 10 temperature, judge whether indoor heat exchanger 10 temperature detected is less than design temperature A8 (A8 is preferably 20 ~ 28 DEG C), if so, proceeds to step B303;
Step B303, control room inner blower are out of service.
This kind of control can effectively avoid indoor fan operate and cause user's sense of discomfort, and heat can be concentrated to remove outdoor heat exchanger 20 frost simultaneously.Indoor heat exchanger 10 is by the indoor heat transfer of radiation direction.
Preferably, also comprise before described step B31:
If B304 meets the condition entering Defrost operation, reduce described compressor 01 frequency, judge whether compressor 01 frequency is less than or equal to setpoint frequency (20-40HZ), if so, proceeds to step B31, proceeds to step B305 if not;
Step B305, when judging whether the pressure that high pressure sensor detects is less than or equal to setting value (1-2MPa), if so, proceed to step B31, proceed to step B306 if not;
Step B307, reduce described compressor 01 frequency.
Controlled by this, the noise produced when can reduce the first control valve 35 and cross valve unlatching, and prevent valve body from damaging under High Pressure Difference.
The control method of the aircondition in the present embodiment, because cold-producing medium during special defrosting leads to indoor heat exchanger 10 and outdoor heat exchanger 20 simultaneously, make indoor have certain heat, do not have cold emission, user is comfortable; And when conventional defrosting and special defrosting, employing is not shut down and is transformed into Defrost mode, shortens defrosting time, improves heating load total in some cycles.
More preferably, described step B4 is specially:
Whether described outdoor heat exchanger 20 temperature that step B41, judgement detect is more than or equal to the outdoor heat exchange actuator temperature M corresponding to outdoor environment temperature, if so, then proceeds to described step B5, if not, proceeds to step B42;
Step B42, judge whether defrosting time reaches setting-up time Time2, if so, then proceed to described step B5.
Figure 5 shows that special defrosting is to heating running control flow chart, Fig. 6 is that defrosting that outdoor environment temperature is corresponding starts temperature and special defrosting enters pipe temperature correction figure.As shown in Figure 5,6, according to the reason exiting defrosting, judge that next time enters mode and the condition of defrosting, namely in special Defrost operation, if be because the temperature of outdoor heat exchanger 20 reaches outdoor heat exchange actuator temperature M corresponding to outdoor environment temperature after having defrosted, then normally run; If proceed to described step B5 because defrosting time reaches setting-up time Time2, count 1 time, meanwhile, make described M increase Δ A (such as 1 DEG C); Before entering described step B31, judge whether stored counts reaches n time (n is preferably 2 times), if so, proceeds to described B31, carry out routine defrosting, and stored counts is reset.Heat required during in order to save defrosting, by such control mode, modifying factor outside cause causes defrosting clean, can remove the frost layer of outdoor heat exchanger 20 as much as possible, improve indoor heating amount.
In Fig. 6, enter the corresponding line of temperature of defrosting when β line represents and normally heats, α represents revised and enters the corresponding line of defrosting temperature, preferably, and β+1≤α≤β+5.
Figure 7 shows that the system diagram of the aircondition in the embodiment of the present invention two, general structure is identical with embodiment one, and difference is, the first cross valve 51 and the second cross valve 52 are replaced with the first triple valve 61 and the second triple valve 62 respectively.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (19)
1. the control method of an aircondition, described aircondition comprises compressor, reversal valve, outdoor heat exchanger, first throttle element and indoor heat exchanger, it is characterized in that, described reversal valve comprises the first reversal valve parallel with one another and the second reversal valve, first reversal valve is connected with the exhaust outlet of described compressor with the first interface of the second reversal valve, first reversal valve is connected with the air entry of compressor with the second interface of the second reversal valve, 3rd interface of the first reversal valve is connected with described indoor heat exchanger, 3rd interface of the second reversal valve is connected with described outdoor heat exchanger, described aircondition also comprises second section fluid element, regenerative apparatus, first control valve and the second control valve, described regenerative apparatus comprises the heat-storing material for accumulating compressor used heat and utilizes the accumulation of heat of this heat-storing material to carry out the regenerative heat exchanger of heat exchange, one end of described regenerative heat exchanger is connected on the pipeline between described first throttle element and described indoor heat exchanger by second section fluid element, the other end is connected through the air entry of the first control valve with described compressor, described second control valve one end is connected on the pipeline between described regenerative heat exchanger and described first control valve, the other end and compressor increase enthalpy mouth and are connected, described control method comprises:
When starting refrigeration and heating operation, control described first control valve and described second control valve closedown;
Freeze and in heating process, detect described outdoor environment temperature, judging whether to need to increase enthalpy according to the described outdoor environment temperature detected, and control the opening and closing of described second control valve according to judged result.
2. control method according to claim 1, is characterized in that, described control method also comprises:
Freeze and in heating process, detect described regenerative apparatus temperature, controlling the opening and closing of described first control valve according to the described regenerative apparatus temperature detected.
3. control method according to claim 2, is characterized in that, described control method comprises:
S1, judge whether described regenerative apparatus temperature is more than or equal to design temperature A3, if so, then proceeds to step S2, if not, then proceeds to step S4;
S2, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to step S3, if not, then proceed to step S5;
S3, control described second control valve and open, enter and increase enthalpy and run;
S4, judge whether to need to increase enthalpy according to described outdoor environment temperature, if so, then proceed to described step S3, if not, proceed to step S5;
S5, control described first control valve and open, judge whether described regenerative apparatus temperature is less than or equal to design temperature A1, if so, control described first control valve and close.
4. control method according to claim 3, is characterized in that, judges whether that the step needing to increase enthalpy comprises according to outdoor environment temperature:
During refrigerating operaton, if described environment temperature is more than or equal to design temperature C1, then need to increase enthalpy;
During heating operation, if described environment temperature is less than or equal to design temperature C2, then need to increase enthalpy.
5. control method according to claim 3, is characterized in that, described step S1 also comprises: judge whether described regenerative apparatus temperature is more than or equal to design temperature A4, if so, then controls described compressor and closes, wherein A4>A3.
6. control method according to claim 3, is characterized in that, described step S5 also comprises: control the throttle degree reducing described first throttle element while described first control valve is opened.
7. control method as claimed in any of claims 1 to 6, is characterized in that, described control method also comprises the steps:
In B1, heating process, detect described indoor heat exchanger temperature, described outdoor heat exchanger inlet temperature, outdoor environment temperature and continuous heating running time;
B2, according to the described indoor heat exchanger temperature that detects and/or described outdoor heat exchanger inlet temperature and outdoor environment temperature and/or continuous heating running time, judge whether to meet the condition entering Defrost operation, if so, then proceed to step B3;
B3, enter Defrost operation;
In B4, Defrost operation process, detect described outdoor heat exchange actuator temperature, outdoor environment temperature and defrosting time, according to the described outdoor heat exchange actuator temperature detected and outdoor environment temperature and/or defrosting time, judge whether to meet the condition exiting defrosting, if so, then step B5 is proceeded to;
B5, exit Defrost operation.
8. control method according to claim 7, is characterized in that, described step B2 is specially:
B21, when continuous heating reaches setting-up time Time1 running time, whether the difference DELTA T1 between the described indoor heat exchanger temperature that judgement detects in real time and the indoor heat exchanger maximum temperature detected above is more than or equal to design temperature A5, if, then proceed to described step B3, if not, then B22 is proceeded to;
Whether the difference DELTA T2 between the described outdoor heat exchanger inlet temperature that B22, judgement detect and the outdoor heat exchange actuator temperature corresponding to described outdoor environment temperature is at that time more than or equal to design temperature A6, if, then proceed to described step B3, if not, then proceed to step B23;
B23, judge whether continuous heating reaches setting-up time Time3 running time, if so, then proceed to described step B3, if otherwise proceed to described B21, wherein Time3>Time1.
9. control method according to claim 7, is characterized in that, described step B3 comprises:
B31, detect described regenerative apparatus temperature, judge enter special Defrost operation or enter conventional Defrost operation according to the described regenerative apparatus temperature detected, if enter special Defrost operation, then proceed to step B32, if enter conventional Defrost operation, then proceed to step B33;
B32, control described second reversal valve go to refrigeration direction, control described first control valve open, then control described compressor frequency and rise to defrosting frequency, carry out special defrosting;
B33, control described first reversal valve and described second reversal valve and transfer refrigeration direction to, then control described compressor frequency and rise to defrosting frequency, carry out routine and defrost.
10. control method according to claim 9, is characterized in that, described step B31 is specially:
Judge whether described regenerative apparatus temperature is more than or equal to design temperature A2, if so, then enter special Defrost operation, if not, then enter conventional Defrost operation.
11. control methods according to claim 9, is characterized in that, described step B32 also comprises:
In special Defrost operation process, control aperture to the first aperture of described first throttle element, after setting-up time Time4, control aperture to the second aperture of described first throttle element, wherein, described second aperture is greater than described first aperture.
12. control methods according to claim 9, is characterized in that, described step B32 also comprises:
In special Defrost operation process, real-time detection outdoor environment temperature and described outdoor heat exchanger inlet temperature, whether the difference DELTA T3 between the described outdoor environment temperature that judgement detects and described outdoor heat exchanger inlet temperature is less than design temperature A7, if so, then outdoor fan is controlled out of service.
13. control methods according to claim 9, is characterized in that, described step B33 also comprises:
In conventional Defrost operation process, detect described compressor exhaust temperature or suction superheat, judge whether whether the described compressor exhaust temperature detected be less than setting value lower than setting value or suction superheat, if so, then control described first control valve and open.
14. control methods according to claim 9, is characterized in that, described step B33 also comprises:
In conventional Defrost operation process, the inlet temperature of real-time detection outdoor environment temperature and outdoor heat exchanger, when whether the difference DELTA T2 between the described outdoor environment temperature that judgement detects and outdoor heat exchanger inlet temperature is less than design temperature A7, if so, then outdoor fan is controlled out of service.
15. control methods according to claim 9, is characterized in that, described step B33 also comprises:
Control aperture to the first aperture of described first throttle element, after setting-up time Time4, control aperture to the second aperture of described first throttle element, wherein, described second aperture is greater than described first aperture.
16. control methods according to claim 9, is characterized in that, also comprise before described step 31:
Reduce described compressor frequency, when compressor frequency is reduced to setpoint frequency, or when the pressure that detects of high pressure sensor is less than setting value, proceed to described step B31.
17. control methods according to claim 9, is characterized in that, also comprise before described step B31:
Inner blower low windscreen in control room runs, heat exchange temperature in real-time sensing chamber, judges whether the indoor heat exchanger temperature detected is less than design temperature A8, and if so, control room inner blower is out of service.
18. control methods according to claim 9, is characterized in that, described step B4 is specially:
Judge whether the described outdoor heat exchange actuator temperature detected is more than or equal to the outdoor heat exchange actuator temperature M corresponding to outdoor environment temperature, if so, then proceeds to described step B5, if not, judge whether defrosting time reaches setting-up time Time2, if so, then proceed to described step B5.
19. control methods according to claim 18, is characterized in that, during special Defrost operation, if proceed to described step B5 because defrosting time reaches setting-up time Time2, count 1 time, meanwhile, make described M increase Δ A; Before entering described step B31, judge whether stored counts reaches n time, if so, proceed to described B33, and stored counts is reset.
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| 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 |
| CN106871296A (en) * | 2017-03-27 | 2017-06-20 | 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 |
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| CN111121229A (en) * | 2019-12-18 | 2020-05-08 | 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 |
| CN111174388A (en) * | 2020-01-03 | 2020-05-19 | 珠海格力电器股份有限公司 | Operation control method and device, storage medium and multi-split 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 |
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| CN109595770A (en) * | 2018-12-07 | 2019-04-09 | 广东Tcl智能暖通设备有限公司 | Air conditioner and its system and control method, computer readable storage medium |
| CN111121229A (en) * | 2019-12-18 | 2020-05-08 | 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 |
| CN111174388A (en) * | 2020-01-03 | 2020-05-19 | 珠海格力电器股份有限公司 | Operation control method and device, storage medium and multi-split system |
| CN115420028A (en) * | 2021-06-01 | 2022-12-02 | 广东美的暖通设备有限公司 | Multi-split system and control method thereof |
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