CN105135628A - Air conditioner and defrosting control method of air conditioner - Google Patents
Air conditioner and defrosting control method of air conditioner Download PDFInfo
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- CN105135628A CN105135628A CN201510634428.6A CN201510634428A CN105135628A CN 105135628 A CN105135628 A CN 105135628A CN 201510634428 A CN201510634428 A CN 201510634428A CN 105135628 A CN105135628 A CN 105135628A
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Abstract
The invention discloses a defrosting control method of the air conditioner, which comprises the following steps: monitoring the temperatures and the humidities of the air inlet and the air outlet of an air conditioner and the temperature of the outdoor environment when the air conditioner runs in a heating mode; judging whether the temperatures and the humidities of the air inlet and the air outlet meet preset conditions; if so, calculating the average temperature of the outdoor environment within a range from the starting time when the temperature of the outdoor environment is initially obtained to the current time; and according to the average temperature, controlling the air conditioner to execute a corresponding defrosting procedure. The invention also discloses the air conditioner. According to the defrosting control method and the air conditioner, the different defrosting procedures can be adopted under the different environments, so that the air conditioner can be used for ensuring the comfort of the indoor temperature while achieving an aim of defrosting with high efficiency.
Description
Technical field
The present invention relates to refrigeration technology field, particularly relate to the defrosting control method of a kind of air-conditioner and air-conditioner.
Background technology
The Defrost mode of existing heat pump type air conditioner has two kinds usually: a kind of is cross valve reverse, although the method defrosting time is short, indoor temperature change generated in case can be made large, thus cause comfortableness poor; Another kind is hot-gas bypass method, although the method can make indoor temperature change generated in case little, makes comfortableness better, under ultralow temperature defrosting environment, still there is the problems such as defrosting time is long, defrosting is unclean.
Foregoing, only for auxiliary understanding technical scheme of the present invention, does not represent and admits that foregoing is prior art.
Summary of the invention
Main purpose of the present invention is the defrosting control method providing a kind of air-conditioner and air-conditioner, and purport adopts different defrosting programs under various circumstances, makes air-conditioner while guarantee indoor temperature comfortableness, can also highly effective defrosting.
For achieving the above object, the invention provides a kind of defrosting control method of air-conditioner, the defrosting control method of described air-conditioner comprises the following steps:
Air-conditioner, when running heating mode, monitors the intake air temperature of described air-conditioner and air inlet humidity, air outlet temperature and air outlet humidity and outdoor environment temperature respectively;
Judge whether described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned;
If so, the start time point of the described outdoor environment temperature of first acquisition is then calculated in current point in time, the mean temperature of described outdoor environment temperature;
According to described mean temperature, control described air-conditioner and enter corresponding defrosting program.
Preferably, describedly judge whether described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned step and comprise:
According to described intake air temperature, air inlet humidity, air outlet temperature and air outlet humidity, calculate the enthalpy difference value between the air outlet air enthalpy of described air-conditioner and described air inlet air enthalpy;
Judge whether described enthalpy difference value is more than or equal to predetermined maximum, if so, then judge that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned.
Preferably, described air-conditioner has a timer, and described calculating obtains the time point of described outdoor environment temperature for the first time in current point in time, and the step of the mean temperature of described outdoor environment temperature comprises:
Start timer, the first start time point obtaining described outdoor environment temperature of record;
When described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, record current point in time;
In described start time point to described current point in time, obtain the outdoor environment temperature corresponding with time point;
According to the described outdoor environment temperature corresponding with time point, calculate the mean temperature of described outdoor environment temperature.
Preferably, described according to described mean temperature, control the step that described air-conditioner enters corresponding defrosting program and comprise:
Judge whether described mean temperature is greater than predetermined temperature;
If so, then control described air-conditioner and enter the first defrosting program;
If not, then control described air-conditioner and enter the second defrosting program.
Preferably, described when described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, also comprise after the step of record current point in time:
Close described timer.
In addition, for achieving the above object, the present invention also provides a kind of air-conditioner, and described air-conditioner comprises:
Monitoring modular, for air-conditioner when running heating mode, monitors the intake air temperature of described air-conditioner and air inlet humidity, air outlet temperature and air outlet humidity and outdoor environment temperature respectively;
Judge module, for judging whether described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned;
If so, computing module, for then calculating the start time point of the described outdoor environment temperature of first acquisition in current point in time, the mean temperature of described outdoor environment temperature;
Control module, for according to described mean temperature, controls described air-conditioner and enters corresponding defrosting program.
Preferably, described judge module comprises:
First computing unit, for according to described intake air temperature, air inlet humidity, air outlet temperature and air outlet humidity, calculates the enthalpy difference value between the air outlet air enthalpy of described air-conditioner and described air inlet air enthalpy;
First judging unit, for judging whether described enthalpy difference value is more than or equal to predetermined maximum, if so, then judges that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned.
Preferably, described air-conditioner has a timer, and described computing module comprises:
First record cell, for starting timer, the first start time point obtaining described outdoor environment temperature of record;
Second record cell, for when described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, record current point in time;
Acquiring unit, in described start time point to described current point in time, obtains the outdoor environment temperature corresponding with time point;
Second computing unit, for according to the described outdoor environment temperature corresponding with time point, calculates the mean temperature of described outdoor environment temperature.
Preferably, described control module comprises:
Second judging unit, for judging whether described mean temperature is greater than predetermined temperature;
First control unit, enters the first defrosting program for if so, then controlling described air-conditioner;
Second control unit, for if not, then controls described air-conditioner and enters the second defrosting program.
Preferably, described computing module also comprises:
Closing unit, for closing described timer.
The defrosting control method of air-conditioner provided by the invention and air-conditioner, first heating mode is run by air-conditioner, then intake air temperature and the air inlet humidity of described air-conditioner is monitored respectively, air outlet temperature and air outlet humidity and outdoor environment temperature, and judge described intake air temperature and air inlet humidity, whether air outlet temperature and air outlet humidity meet pre-conditioned, if, then calculate the start time point of the described outdoor environment temperature of first acquisition in current point in time, the mean temperature of described outdoor environment temperature, and according to described mean temperature, control described air-conditioner and enter corresponding defrosting program.Like this, air-conditioner can according to varying environment temperature, the defrosting program that corresponding employing is different, while making it possible to ensure indoor temperature comfortableness, and can also highly effective defrosting.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of defrosting control method one embodiment of air-conditioner of the present invention;
Fig. 2 is that in Fig. 1, step judges whether described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned refinement schematic flow sheet;
Fig. 3 is that in Fig. 1, if so, step then calculates the start time point of the described outdoor environment temperature of first acquisition in current point in time, the refinement schematic flow sheet of the mean temperature of described outdoor environment temperature;
Fig. 4 is that in Fig. 1, step, according to described mean temperature, controls the refinement schematic flow sheet that described air-conditioner enters corresponding defrosting program;
Fig. 5 is the high-level schematic functional block diagram of air-conditioner one embodiment of the present invention;
Fig. 6 is the refinement high-level schematic functional block diagram of judge module in Fig. 5;
Fig. 7 is the refinement high-level schematic functional block diagram of computing module in Fig. 5;
Fig. 8 is the refinement high-level schematic functional block diagram of control module in Fig. 5;
Fig. 9 is the refrigerant flow direction schematic diagram of hot gas bypass defrosting method under usual low temperature environment;
Figure 10 is the refrigerant flow direction schematic diagram of cross valve reverse cycle defrost method under ultra-low temperature surroundings.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of defrosting control method of air-conditioner, with reference to Fig. 1, in one embodiment, the defrosting control method of described air-conditioner comprises the following steps:
Step S101, air-conditioner, when running heating mode, monitors the intake air temperature of described air-conditioner and air inlet humidity, air outlet temperature and air outlet humidity and outdoor environment temperature respectively;
In the present embodiment, air-conditioner comprises the first temperature sensor, the first humidity sensor of being located at air inlet, is located at second temperature sensor at air outlet place, the second humidity sensor.Air-conditioner first open heating mode or defrosting EP (end of program) after normal operation heating mode time, the temperature of the first temperature sensor Real-Time Monitoring air inlet of air-conditioner, the humidity of the first humidity sensor Real-Time Monitoring air inlet, the temperature at the second temperature sensor Real-Time Monitoring air outlet place of air-conditioner, the humidity at the second humidity sensor Real-Time Monitoring air outlet place.Certainly, be understandable that, in other embodiments, air-conditioner also can more than the frequency acquisition of the interval scheduled time various parameter.
Step S102, judges whether described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned;
In the present embodiment, the refrigeration of air-conditioner, heating capacity all with the air enthalpy difference value direct proportionality into and out of air port, therefore, can by refrigeration, the heating capacity of the air enthalpy difference value reflection air-conditioner into and out of air port.Particularly, describedly pre-conditionedly can be set to: when judging that air enthalpy difference value reaches maximum, represent that air conditioner heat-production ability also reaches maximum, now can judge that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned.
Step S103, if so, then calculates the start time point of the described outdoor environment temperature of first acquisition in current point in time, the mean temperature of described outdoor environment temperature;
In the present embodiment, when air-conditioner judges described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, calculate the start time point of the described outdoor environment temperature of first acquisition in current point in time, the mean temperature of described outdoor environment temperature.Wherein, the acquisition of described mean temperature, can pass through to start time point in current point in time, all outdoor environment temperatures that each time point is corresponding, the calculating of the temperature that is averaged; Also at start time point in current point in time, the outdoor environment temperature of predetermined quantity can be chosen, the calculating of the temperature that is averaged; The frequency acquisition outdoor environment temperature of all right predetermined interval, is then averaged temperature to the outdoor environment temperature obtained.
Step S104, according to described mean temperature, controls described air-conditioner and enters corresponding defrosting program.
In the present embodiment, air-conditioner, according to the outdoor environment mean temperature obtained, controls to enter hot gas bypass defrosting program or cross valve reverse cycle defrost program.As when as described in mean temperature be greater than predetermined temperature as-10 DEG C, show that the long-pending frost on outdoor heat exchanger is thinner, control air-conditioner and enter hot gas bypass defrosting program, can while guarantee indoor temperature comfortableness quickly defrosting; And when described mean temperature is less than or equal to predetermined temperature as-10 DEG C, show that the long-pending frost on outdoor heat exchanger is thicker, if now enter hot gas bypass defrosting program, there will be defrosting time for a long time and the sordid phenomenon that defrosts, for avoiding this phenomenon, air-conditioner can be controlled and enter cross valve reverse cycle defrost program, can while guarantee indoor temperature comfortableness quickly defrosting.
The defrosting control method of air-conditioner provided by the invention, first heating mode is run by air-conditioner, then intake air temperature and the air inlet humidity of described air-conditioner is monitored respectively, air outlet temperature and air outlet humidity and outdoor environment temperature, and judge described intake air temperature and air inlet humidity, whether air outlet temperature and air outlet humidity meet pre-conditioned, if, then calculate the start time point of the described outdoor environment temperature of first acquisition in current point in time, the mean temperature of described outdoor environment temperature, and according to described mean temperature, control described air-conditioner and enter corresponding defrosting program.Like this, air-conditioner can according to varying environment temperature, the defrosting program that corresponding employing is different, while making it possible to ensure indoor temperature comfortableness, and can also highly effective defrosting.
In one embodiment, as shown in Figure 2, on the embodiment basis shown in Fig. 1, described step S102 comprises:
Step S1021, according to described intake air temperature, air inlet humidity, air outlet temperature and air outlet humidity, calculates the enthalpy difference value between the air outlet air enthalpy of described air-conditioner and described air inlet air enthalpy;
In the present embodiment, the computing formula of air enthalpy is:
I=(1.01+1.88H) T+2491.3H (1), wherein, I represents the enthalpy of air, and unit is KJ/Kg; H represents the humidity of air, and unit is Kg/Kg; T represents the temperature of air, and unit is DEG C.
Calculate the air outlet air enthalpy I of described air-conditioner
2with described air inlet air enthalpy I
1between enthalpy difference value:
ΔI＝I
2-I
1＝(1.01+1.88H
2)T
2-(1.01+1.88H
1)T
1+2491.3(H
2-H
1)(2)
Known by formula (2), only need measure air themperature, the humidity into and out of air port, air outlet air enthalpy I can be calculated
2with described air inlet air enthalpy I
1between enthalpy difference value, the heating capacity of air-conditioner can be estimated thus.
Step S1022, judges whether described enthalpy difference value is more than or equal to predetermined maximum, if so, then judges that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned.
In the present embodiment, if air-conditioner judges enthalpy, difference DELTA I is more than or equal to predetermined maximum, then judge that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned; If air-conditioner judges enthalpy, difference DELTA I is less than, then continue in real time or be interrupted to obtain intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity, until described Δ I is more than or equal to predetermined maximum.Wherein, for the air-conditioner of refrigerating capacity between 2200 to 2600W, be 25 machines (refrigerating capacity is 2500W) air-conditioner as common, the predetermined maximum of its heating capacity is generally 2613W; For the air-conditioner of refrigerating capacity between 3200 to 3600W, be 35 machines (refrigerating capacity is 3500W) air-conditioner as common, the predetermined maximum of its heating capacity is generally 3658W; For the air-conditioner of refrigerating capacity between 4500 to 5500W, as with common be 50 machines (refrigerating capacity is for 5000W) air-conditioner, the predetermined maximum of its heating capacity is generally 5225W.
In one embodiment, as shown in Figure 3, on the embodiment basis shown in Fig. 1, described air-conditioner has a timer, and described step S103 comprises:
Step S1031, starts timer, the first start time point obtaining described outdoor environment temperature of record;
In the present embodiment, air-conditioner starts timer, the first start time point obtaining described outdoor environment temperature of record, then with the scheduled time as frequency acquisition outdoor environment temperature per second.Certainly, in other embodiments, 2 seconds, 3 seconds equifrequents acquisition outdoor environment temperature can also be interrupted.
Step S1032, when described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, record current point in time;
In the present embodiment, when air-conditioner judges that enthalpy difference DELTA I is more than or equal to predetermined maximum, described timer can record current point in time, alternatively, after completing record current point in time, can close described timer.
Step S1033, in described start time point to described current point in time, obtains the outdoor environment temperature corresponding with time point;
Step S1034, according to the described outdoor environment temperature corresponding with time point, calculates the mean temperature of described outdoor environment temperature.
In the present embodiment, as the time point t obtained
1corresponding outdoor environment temperature is M
1, time point t
2corresponding outdoor environment temperature is M
2, the time point t of acquisition
3corresponding outdoor environment temperature is M
3, until the time point t obtained
ncorresponding outdoor environment temperature is M
ntime, the mean temperature of described outdoor environment temperature is (M
1+ M
2+ ... + M
n)/n.Be understandable that, in other embodiments, also can choose the calculating of several values of being averaged wherein, be not limited to the present embodiment.
In one embodiment, as shown in Figure 4, on the embodiment basis shown in Fig. 1, described step S104 comprises:
Step S1041, judges whether described mean temperature is greater than predetermined temperature;
Step S1042, if so, then controls described air-conditioner and enters the first defrosting program;
In the present embodiment, air-conditioner is according to the outdoor environment mean temperature obtained, control enters hot gas bypass defrosting program or cross valve reverse cycle defrost program, if air-conditioner is when as described in judging, mean temperature is greater than predetermined temperature as-10 DEG C, show that the long-pending frost on outdoor heat exchanger is thinner, now control air-conditioner and enter the first defrosting program (hot gas bypass defrosting program), can while guarantee indoor temperature comfortableness quickly defrosting.
Step S1043, if not, then controls described air-conditioner and enters the second defrosting program.
In the present embodiment, air-conditioner is according to the outdoor environment mean temperature obtained, control enters hot gas bypass defrosting program or cross valve reverse cycle defrost program, as air-conditioner mean temperature as described in judgement is less than or equal to predetermined temperature as-10 DEG C, show that the long-pending frost on outdoor heat exchanger is thicker, if now enter hot gas bypass defrosting program, there will be defrosting time for a long time and the sordid phenomenon that defrosts.For avoiding this phenomenon, air-conditioner can be controlled and enters cross valve reverse cycle defrost program, can while guarantee indoor temperature comfortableness quickly defrosting.
The present invention also provides a kind of air-conditioner 1, and with reference to Fig. 5, in one embodiment, described air-conditioner 1 comprises:
Monitoring modular 101, for air-conditioner 1 when running heating mode, monitors the intake air temperature of described air-conditioner 1 and air inlet humidity, air outlet temperature and air outlet humidity and outdoor environment temperature respectively;
In the present embodiment, air-conditioner 1 comprises the first temperature sensor, the first humidity sensor of being located at air inlet, is located at second temperature sensor at air outlet place, the second humidity sensor.Air-conditioner 1 first open heating mode or defrosting EP (end of program) after normal operation heating mode time, the temperature of the first temperature sensor Real-Time Monitoring air inlet of air-conditioner 1, the humidity of the first humidity sensor Real-Time Monitoring air inlet, the temperature at the second temperature sensor Real-Time Monitoring air outlet place of air-conditioner 1, the humidity at the second humidity sensor Real-Time Monitoring air outlet place.Certainly, be understandable that, in other embodiments, air-conditioner 1 also can more than the frequency acquisition of the interval scheduled time various parameter.
Judge module 102, for judging whether described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned;
In the present embodiment, the refrigeration of air-conditioner 1, heating capacity all with the air enthalpy difference value direct proportionality into and out of air port, therefore, can by refrigeration, the heating capacity of the air enthalpy difference value reflection air-conditioner 1 into and out of air port.Particularly, describedly pre-conditionedly can be set to: when judging that air enthalpy difference value reaches maximum, represent that air-conditioner 1 heating capacity also reaches maximum, now can judge that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned.
If so, computing module 103, for then calculating the start time point of the described outdoor environment temperature of first acquisition in current point in time, the mean temperature of described outdoor environment temperature;
In the present embodiment, when air-conditioner 1 judges described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, calculate the start time point of the described outdoor environment temperature of first acquisition in current point in time, the mean temperature of described outdoor environment temperature.Wherein, the acquisition of described mean temperature, can pass through to start time point in current point in time, all outdoor environment temperatures that each time point is corresponding, the calculating of the temperature that is averaged; Also at start time point in current point in time, the outdoor environment temperature of predetermined quantity can be chosen, the calculating of the temperature that is averaged; The frequency acquisition outdoor environment temperature of all right predetermined interval, is then averaged temperature to the outdoor environment temperature obtained.
Control module 104, for according to described mean temperature, controls described air-conditioner 1 and enters corresponding defrosting program.
In the present embodiment, air-conditioner 1, according to the outdoor environment mean temperature obtained, controls to enter hot gas bypass defrosting program or cross valve reverse cycle defrost program.As when as described in mean temperature be greater than predetermined temperature as-10 DEG C, show that the long-pending frost on outdoor heat exchanger is thinner, control air-conditioner 1 and enter hot gas bypass defrosting program, can while guarantee indoor temperature comfortableness quickly defrosting; And when described mean temperature is less than or equal to predetermined temperature as-10 DEG C, show that the long-pending frost on outdoor heat exchanger is thicker, if now enter hot gas bypass defrosting program, there will be defrosting time for a long time and the sordid phenomenon that defrosts, for avoiding this phenomenon, air-conditioner 1 can be controlled and enter cross valve reverse cycle defrost program, can while guarantee indoor temperature comfortableness quickly defrosting.
Air-conditioner 1 provided by the invention, first heating mode is run by air-conditioner 1, then intake air temperature and the air inlet humidity of described air-conditioner 1 is monitored respectively, air outlet temperature and air outlet humidity and outdoor environment temperature, and judge described intake air temperature and air inlet humidity, whether air outlet temperature and air outlet humidity meet pre-conditioned, if, then calculate the start time point of the described outdoor environment temperature of first acquisition in current point in time, the mean temperature of described outdoor environment temperature, and according to described mean temperature, control described air-conditioner 1 and enter corresponding defrosting program.Like this, air-conditioner 1 can according to varying environment temperature, the defrosting program that corresponding employing is different, while making it possible to ensure indoor temperature comfortableness, and can also highly effective defrosting.
In one embodiment, as shown in Figure 6, on the embodiment basis shown in Fig. 5, described judge module 102 comprises:
First computing unit 1021, for according to described intake air temperature, air inlet humidity, air outlet temperature and air outlet humidity, calculates the enthalpy difference value between the air outlet air enthalpy of described air-conditioner 1 and described air inlet air enthalpy;
In the present embodiment, the computing formula of air enthalpy is:
I=(1.01+1.88H) T+2491.3H (1), wherein, I represents the enthalpy of air, and unit is KJ/Kg; H represents the humidity of air, and unit is Kg/Kg; T represents the temperature of air, and unit is DEG C.
Calculate the air outlet air enthalpy I of described air-conditioner 1
2with described air inlet air enthalpy I
1between enthalpy difference value:
ΔI＝I
2-I
1＝(1.01+1.88H
2)T
2-(1.01+1.88H
1)T
1+2491.3(H
2-H
1)(2)
Known by formula (2), only need measure air themperature, the humidity into and out of air port, air outlet air enthalpy I can be calculated
2with described air inlet air enthalpy I
1between enthalpy difference value, the heating capacity of air-conditioner 1 can be estimated thus.
First judging unit 1022, for judging whether described enthalpy difference value is more than or equal to predetermined maximum, if so, then judges that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned.
In the present embodiment, if air-conditioner 1 judges that enthalpy difference DELTA I is more than or equal to predetermined maximum, then judge that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned; If air-conditioner 1 judges that enthalpy difference DELTA I is less than, then continue in real time or be interrupted to obtain intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity, until described Δ I is more than or equal to predetermined maximum.Wherein, for the air-conditioner 1 of refrigerating capacity between 2200 to 2600W, be 25 machines (refrigerating capacity is 2500W) air-conditioner 1 as common, the predetermined maximum of its heating capacity is generally 2613W; For the air-conditioner 1 of refrigerating capacity between 3200 to 3600W, be 35 machines (refrigerating capacity is 3500W) air-conditioner 1 as common, the predetermined maximum of its heating capacity is generally 3658W; For the air-conditioner 1 of refrigerating capacity between 4500 to 5500W, as with common be 50 machines (refrigerating capacity is for 5000W) air-conditioner 1, the predetermined maximum of its heating capacity is generally 5225W.
In one embodiment, as shown in Figure 7, on the embodiment basis shown in Fig. 5, described air-conditioner 1 has a timer, and described air-conditioner 1 has a timer, and described computing module 103 comprises:
First record cell 1031, for starting timer, the first start time point obtaining described outdoor environment temperature of record;
In the present embodiment, air-conditioner 1 starts timer, the first start time point obtaining described outdoor environment temperature of record, then with the scheduled time as frequency acquisition outdoor environment temperature per second.Certainly, in other embodiments, 2 seconds, 3 seconds equifrequents acquisition outdoor environment temperature can also be interrupted.
Second record cell 1032, for when described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, record current point in time;
In the present embodiment, when air-conditioner 1 judges that enthalpy difference DELTA I is more than or equal to predetermined maximum, described timer can record current point in time, alternatively, described computing module can also comprise closing unit (not shown), for closing described timer.
Acquiring unit 1033, in described start time point to described current point in time, obtains the outdoor environment temperature corresponding with time point;
Second computing unit 1034, for according to the described outdoor environment temperature corresponding with time point, calculates the mean temperature of described outdoor environment temperature.
In the present embodiment, as the time point t obtained
1corresponding outdoor environment temperature is M
1, time point t
2corresponding outdoor environment temperature is M
2, the time point t of acquisition
3corresponding outdoor environment temperature is M
3, until the time point t obtained
ncorresponding outdoor environment temperature is M
ntime, the mean temperature of described outdoor environment temperature is (M
1+ M
2+ ... + M
n)/n.Be understandable that, in other embodiments, also can choose the calculating of several values of being averaged wherein, be not limited to the present embodiment.
In one embodiment, as shown in Figure 8, on the embodiment basis shown in Fig. 5, described control module 104 comprises:
Second judging unit 1041, for judging whether described mean temperature is greater than predetermined temperature;
First control unit 1042, enters the first defrosting program for if so, then controlling described air-conditioner 1;
In the present embodiment, air-conditioner 1 is according to the outdoor environment mean temperature obtained, control enters hot gas bypass defrosting program or cross valve reverse cycle defrost program, if air-conditioner 1 is when as described in judging, mean temperature is greater than predetermined temperature as-10 DEG C, show that the long-pending frost on outdoor heat exchanger is thinner, now control air-conditioner 1 and enter the first defrosting program (hot gas bypass defrosting program), can while guarantee indoor temperature comfortableness quickly defrosting.
Second control unit 1043, for if not, then controls described air-conditioner 1 and enters the second defrosting program.
In the present embodiment, air-conditioner 1 is according to the outdoor environment mean temperature obtained, control enters hot gas bypass defrosting program or cross valve reverse cycle defrost program, as air-conditioner 1 mean temperature as described in judgement is less than or equal to predetermined temperature as-10 DEG C, show that the long-pending frost on outdoor heat exchanger is thicker, if now enter hot gas bypass defrosting program, there will be defrosting time for a long time and the sordid phenomenon that defrosts.For avoiding this phenomenon, air-conditioner 1 can be controlled and enters cross valve reverse cycle defrost program, can while guarantee indoor temperature comfortableness quickly defrosting.
With reference to Fig. 9 and Figure 10,1 is compressor, and 2 is cross valve, 3 is indoor heat exchanger, 4 is electrical heating, and 5 is indoor heat exchanger fan, and 6,9,10 is electric expansion valve, 7,8,13,14,15,16 is magnetic valve, 12 is outdoor heat exchanger, and 121 is windward side heat exchanger, and 122 is lee face heat exchanger, 17 is muffler electrical heating, and 18 is gas-liquid separator.
Fig. 9 is hot gas bypass defrosting method schematic diagram under usual low temperature environment.For lee face defrosting, the circular flow of cold-producing medium is to as follows: the cold-producing medium of HTHP discharged by compressor 1, flow in indoor heat exchanger 3 (can ensure that indoor temperature change generated in case amplitude is little) through cross valve 2 rear portion, another part flows in lee face heat exchanger 122 through magnetic valve 16 and defrosts, then two parts cold-producing medium is respectively after electric expansion valve 6,9 throttling, enter in windward side heat exchanger 121, and enter compressor return air pipe through magnetic valve 13, cross valve 2, after final cooled via return air pipe electrical heating 17 heating, get back to compressor 1 from gas-liquid separator 18.The defrosting principle of outdoor heat exchanger another part windward side heat exchanger 121 is similar to lee face principle.
Figure 10 is cross valve reverse cycle defrost method schematic diagram under ultra-low temperature surroundings.When outdoor environment is too low, hot gas bypass defrosting method there will be defrosting time for a long time, defrost sordid shortcoming, now need to adopt cross valve reverse cycle defrost method to defrost.The circular flow of cold-producing medium is to as follows: high-temperature high-pressure refrigerant discharged by compressor 1, flow into after cross valve 2 in outdoor heat exchanger 12 with quickly defrosting, the cold-producing medium that heat exchanger 12 flows out outdoor becomes low-temperature low-pressure refrigerant after electric expansion valve 6 throttling, then enter in indoor heat exchanger 3 (now by opening electrical heating 4, avoid indoor temperature change generated in case amplitude larger), finally enter after muffler electrical heating 17 heating through cross valve 2, get back to compressor 1 from gas-liquid separator 18.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a defrosting control method for air-conditioner, is characterized in that, the defrosting control method of described air-conditioner comprises the following steps:
Air-conditioner, when running heating mode, monitors the intake air temperature of described air-conditioner and air inlet humidity, air outlet temperature and air outlet humidity and outdoor environment temperature respectively;
Judge whether described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned;
If so, the start time point of the described outdoor environment temperature of first acquisition is then calculated in current point in time, the mean temperature of described outdoor environment temperature;
According to described mean temperature, control described air-conditioner and enter corresponding defrosting program.
2. the defrosting control method of air-conditioner as claimed in claim 1, is characterized in that, describedly judges whether described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned step and comprise:
According to described intake air temperature, air inlet humidity, air outlet temperature and air outlet humidity, calculate the enthalpy difference value between the air outlet air enthalpy of described air-conditioner and described air inlet air enthalpy;
Judge whether described enthalpy difference value is more than or equal to predetermined maximum, if so, then judge that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned.
3. the defrosting control method of air-conditioner as claimed in claim 1 or 2, it is characterized in that, described air-conditioner has a timer, and described calculating obtains the time point of described outdoor environment temperature for the first time in current point in time, and the step of the mean temperature of described outdoor environment temperature comprises:
Start timer, the first start time point obtaining described outdoor environment temperature of record;
When described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, record current point in time;
In described start time point to described current point in time, obtain the outdoor environment temperature corresponding with time point;
According to the described outdoor environment temperature corresponding with time point, calculate the mean temperature of described outdoor environment temperature.
4. the defrosting control method of air-conditioner as claimed in claim 3, is characterized in that, described according to described mean temperature, controls the step that described air-conditioner enters corresponding defrosting program and comprises:
Judge whether described mean temperature is greater than predetermined temperature;
If so, then control described air-conditioner and enter the first defrosting program;
If not, then control described air-conditioner and enter the second defrosting program.
5. the defrosting control method of air-conditioner as claimed in claim 3, is characterized in that, described when described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, also comprises after the step of record current point in time:
Close described timer.
6. an air-conditioner, is characterized in that, described air-conditioner comprises:
Monitoring modular, for air-conditioner when running heating mode, monitors the intake air temperature of described air-conditioner and air inlet humidity, air outlet temperature and air outlet humidity and outdoor environment temperature respectively;
Judge module, for judging whether described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned;
If so, computing module, for then calculating the start time point of the described outdoor environment temperature of first acquisition in current point in time, the mean temperature of described outdoor environment temperature;
Control module, for according to described mean temperature, controls described air-conditioner and enters corresponding defrosting program.
7. air-conditioner as claimed in claim 6, it is characterized in that, described judge module comprises:
First computing unit, for according to described intake air temperature, air inlet humidity, air outlet temperature and air outlet humidity, calculates the enthalpy difference value between the air outlet air enthalpy of described air-conditioner and described air inlet air enthalpy;
First judging unit, for judging whether described enthalpy difference value is more than or equal to predetermined maximum, if so, then judges that described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned.
8. air-conditioner as claimed in claims 6 or 7, it is characterized in that, described air-conditioner has a timer, and described computing module comprises:
First record cell, for starting timer, the first start time point obtaining described outdoor environment temperature of record;
Second record cell, for when described intake air temperature and air inlet humidity, air outlet temperature and air outlet humidity meet pre-conditioned, record current point in time;
Acquiring unit, in described start time point to described current point in time, obtains the outdoor environment temperature corresponding with time point;
Second computing unit, for according to the described outdoor environment temperature corresponding with time point, calculates the mean temperature of described outdoor environment temperature.
9. air-conditioner as claimed in claim 8, it is characterized in that, described control module comprises:
Second judging unit, for judging whether described mean temperature is greater than predetermined temperature;
First control unit, enters the first defrosting program for if so, then controlling described air-conditioner;
Second control unit, for if not, then controls described air-conditioner and enters the second defrosting program.
10. air-conditioner as claimed in claim 8, it is characterized in that, described computing module also comprises:
Closing unit, for closing described timer.
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