CN103712308A - Air conditioner capacity regulating and controlling method and system - Google Patents
Air conditioner capacity regulating and controlling method and system Download PDFInfo
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- CN103712308A CN103712308A CN201210371577.4A CN201210371577A CN103712308A CN 103712308 A CN103712308 A CN 103712308A CN 201210371577 A CN201210371577 A CN 201210371577A CN 103712308 A CN103712308 A CN 103712308A
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Abstract
The invention is applicable to the field of refrigeration equipment control, and particularly relates to an air conditioner capacity regulating and controlling method and system. According to the method and system, a user preset temperature digital voltage signal, an outdoor heat exchanger return air temperature digital voltage signal and an indoor heat exchanger return air temperature digital voltage signal are correspondingly generated according to a user preset temperature value, an outdoor heat exchanger return air temperature value and an indoor heat exchanger return air temperature value, a corresponding start-stop time ratio of an outer fan of an air conditioner is acquired to control stop and start of the outer fan of the air conditioner, and further corresponding start and stop control is performed on the outer fan of the air conditioner under different environmental temperature conditions so as to regulate capacity output of the air conditioner, so that an indoor heat exchanger of the air conditioner is prevented from frosting during refrigeration in low-temperature environment, refrigeration effect is improved, and a compressor is ensured not to be damaged in normal operation so as to prolong service life thereof.
Description
Technical field
The invention belongs to refrigeration plant control field, relate in particular to a kind of air-conditioner capacity regulating control method and system.
Background technology
At present, the operating ambient temperature during refrigeration of common air-conditioner is generally 18 degrees Celsius to 43 degrees Celsius, is relatively applicable to family expenses or commercialization; And for some special places, as large-scale communication machine room, power distribution room or electronic equipment workshop etc., the constantly heating in running due to the equipment in these places or machine, and then shortening equipment or service life of a machine, so need to be in temperature lower than 18 degrees Celsius, even lower than realization under the ambient temperature conditions of 0 degree Celsius, freeze with the temperature of reduction equipment or machine, thus the service life of extension device or machine.
In existing air-conditioner, if require air-conditioner, under low temperature environment, realize refrigeration, the outdoor heat exchanger return air temperature of the off-premises station of air-conditioner and condensing pressure can be very low, it is lower that the pressure of cold-producing medium can become after throttling, cold-producing medium is after entering the evaporimeter of indoor heat exchanger, because evaporating temperature is low, easily cause evaporimeter frosting and freeze, and then the air quantity of indoor heat exchanger is reduced, refrigeration variation, and likely cause indoor heat exchanger to leak, and also can in evaporimeter, evaporate because of cold-producing medium not exclusively makes liquid refrigerant be back to compressor, and then damage compressor, moreover when air-conditioner moves in the situation that environment temperature is lower, compressor meeting frequent starting and the ability output that stops controlling whole refrigeration system, can reach refrigeration object although it is so, but the service life of the serious shortening of meeting compressor.
Summary of the invention
The object of the present invention is to provide a kind of air-conditioner capacity regulating control method, existing poor refrigerating efficiency when being intended to solve existing air-conditioner and freezing under low temperature environment, causes damage to compressor, and can shorten the compressor problem in service life.
The present invention is achieved in that a kind of air-conditioner capacity regulating control method, and described air-conditioner capacity regulating control method comprises the following steps:
According to user preset temperature value, outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value, generate corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal;
According to described user preset temperature digital voltage signal, described outdoor heat exchanger return air temperature digital voltage signal and described indoor heat exchanger return air temperature digital voltage signal, obtain the start-stop time ratio of the outer blower fan of air-conditioning;
According to the start and stop of the outer blower fan of described start-stop time proportion control air-conditioning.
Another object of the present invention is also to provide a kind of air-conditioner capacity regulating control system, and described air-conditioner capacity regulating control system comprises:
Temperature analysis module, for generating corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal according to user preset temperature value, outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value;
Start-stop time acquisition module, for obtaining the start-stop time ratio of the outer blower fan of air-conditioning according to described user preset temperature digital voltage signal, described outdoor heat exchanger return air temperature digital voltage signal and described indoor heat exchanger return air temperature digital voltage signal;
The outer blower fan control module of air-conditioning, for according to the start and stop of the outer blower fan of described start-stop time proportion control air-conditioning.
In the present invention, by according to user preset temperature value, outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value generate corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor return air temperature digital voltage signal obtain the start-stop time ratio of the outer blower fan of corresponding air-conditioning to control the start and stop of the outer blower fan of air-conditioning, and then outside having realized under varying environment temperature conditions air-conditioning, blower fan carries out corresponding on off control to adjust the ability output of air-conditioner, thereby the indoor heat exchanger frosting of air-conditioner while avoiding freezing under low temperature environment, improve refrigeration and guarantee that compressor is not damaged to extend its service life in the situation that of normal operation.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the air-conditioner capacity regulating control method that provides of the embodiment of the present invention;
Fig. 2 is the schematic diagram of the related pulse signal of the air-conditioner capacity regulating control method that provides of the embodiment of the present invention;
Fig. 3 is the structure chart of the air-conditioner capacity regulating control system that provides of the embodiment of the present invention.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
In embodiments of the present invention, by according to user preset temperature value, outdoor heat exchanger return air inlet temperature value, indoor heat exchanger return air inlet temperature value generates corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal, indoor return air temperature digital voltage signal obtains the start-stop time ratio of the outer blower fan of corresponding air-conditioning to control the start and stop of the outer blower fan of air-conditioning, and then outside having realized under varying environment temperature conditions air-conditioning, blower fan carries out corresponding on off control to adjust the ability output of air-conditioner, thereby the indoor heat exchanger frosting of air-conditioner while avoiding freezing under low temperature environment, improve refrigeration and guarantee that compressor is not damaged to extend its service life in the situation that of normal operation.
Fig. 1 shows the realization flow of the air-conditioner capacity regulating control method that the embodiment of the present invention provides, and for convenience of explanation, only shows part related to the present invention, and details are as follows:
In step S1, according to user preset temperature value, outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value, generate corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal; Step S1 specifically comprises the following steps:
Sensing chamber's external heat exchanger return air inlet temperature and indoor heat exchanger return air inlet temperature also generate respectively corresponding outdoor heat exchanger return air temperature voltage signal and indoor heat exchanger return air temperature voltage signal;
According to outdoor heat exchanger return air temperature voltage signal and indoor heat exchanger return air temperature voltage signal, obtain respectively outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value;
According to user preset temperature value, outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value, generate respectively corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal, indoor heat exchanger return air temperature digital voltage signal.
Wherein, outdoor heat exchanger return air temperature voltage signal and indoor heat exchanger return air temperature voltage signal are respectively the analog voltage signals corresponding with outdoor heat exchanger return air inlet temperature and indoor heat exchanger return air inlet temperature.
In step S2, according to user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal, obtain the start-stop time ratio of the outer blower fan of air-conditioning; Step S2 specifically comprises the following steps:
According to user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor return air temperature digital voltage signal, calculate the target output capacity of air-conditioner;
The ratio that accounts for the maximum output capacity of air-conditioner according to the target output capacity of air-conditioner is set the outer blower fan start-stop time ratio of air-conditioning.
Wherein, the outer blower fan start-stop time ratio of air-conditioning is divided into outer blower fan ratio start-up time of air-conditioning and air-conditioning exogenous wind office stops time scale, setting the special time cycle is T, if outer blower fan ratio start-up time of air-conditioning is n(0≤n≤1), air-conditioning exogenous wind office stops time scale for (1-n), so, the outer blower fan of air-conditioning start-up time is exactly nT, and air-conditioning exogenous wind is (1-n) T between office's stopping time; It is corresponding with the target output capacity of air-conditioner due to outer blower fan ratio start-up time of air-conditioning and air-conditioning exogenous wind office, stopping time scale, if target output capacity is 25% of the maximum output capacity of air-conditioner, the outer blower fan ratio start-up time n=25% of air-conditioning, it is 75% that air-conditioning exogenous wind office stops time scale.
In step S3, according to the start and stop of the outer blower fan of start-stop time proportion control air-conditioning of the outer blower fan of air-conditioning; Step S3 specifically comprises the following steps:
According to the outer blower fan start-stop time ratio of air-conditioning, generate the pulse signal with corresponding dutycycle;
According to pulse signal, with special time loop cycle, control the startup of the outer blower fan of air-conditioning and close down.
Wherein, the outer blower fan start-stop time ratio of air-conditioning is consistent with the dutycycle of pulse signal, as shown in Figure 2, the dutycycle of pulse signal equals the outer blower fan ratio start-up time n of air-conditioning, the time width of the high level pulse comprising in pulse signal is nT, and the time width of low level pulse is (1-n) T.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is with the relevant hardware of instruction, to complete by program, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
Fig. 3 shows the structure of the air-conditioner capacity regulating control system that the embodiment of the present invention provides, and for convenience of explanation, only shows part related to the present invention, and details are as follows:
Air-conditioner capacity regulating control system comprises:
Start-stop time acquisition module 200, for obtaining the start-stop time ratio of the outer blower fan of air-conditioning according to user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal, indoor heat exchanger return air temperature digital voltage signal;
The outer blower fan control module 300 of air-conditioning, for according to the start and stop of the outer blower fan of start-stop time proportion control air-conditioning of the outer blower fan of air-conditioning.
Further, temperature analysis module 100 comprises:
The first temperature sensing unit 101, for detection of outdoor heat exchanger return air inlet temperature and generate corresponding outdoor heat exchanger return air temperature voltage signal;
The second temperature sensing unit 102, for detection of indoor heat exchanger return air inlet temperature and generate corresponding indoor heat exchanger return air temperature voltage signal;
Temperature value acquiring unit 103, for obtaining respectively outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value according to outdoor heat exchanger return air temperature voltage signal and indoor heat exchanger return air temperature voltage signal;
Digital voltage signal generation unit 104, for generating respectively corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal according to user preset temperature value, outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value.
Wherein, the first temperature sensing unit 101 and the second temperature sensing unit 102 can be all temperature sensor or other temperature-sensing elements in actual applications.
Further, start-stop time acquisition module 200 comprises:
Output capacity computing unit 201, for calculating the target output capacity of air-conditioner according to user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal, indoor heat exchanger return air temperature digital voltage signal;
Start-stop time setup unit 202, sets the outer blower fan start-stop time ratio of air-conditioning for account for the ratio of the maximum output capacity of air-conditioner according to the target output capacity of air-conditioner.
Wherein, in actual application, output capacity computing unit 201 and start-stop time setup unit 202 can be integrated in one to be possessed in the microprocessor of data processing and operational capability.
Further, the outer blower fan control module 300 of air-conditioning comprises:
Pulse signal generation unit 301, for generating the pulse signal with corresponding dutycycle according to the outer blower fan start-stop time ratio of air-conditioning;
Outer blower fan control module 302, for controlling the startup of the outer blower fan of air-conditioning and close down with special time loop cycle according to pulse signal.
Wherein, in actual application, pulse signal generation unit 302 can be contained in a driving chip, and outer blower fan control module 303 can be a relay, its pulse signal generating according to pulse signal generation unit 302 is realized the break-make (conducting of switching on when pulse signal is high level according to corresponding dutycycle, when pulse signal is low level, power-off is turn-offed), thus reach the object that the start and stop of the outer blower fan of air-conditioning are controlled.
In embodiments of the present invention, by according to user preset temperature value, outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value generate corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal obtain the start-stop time ratio of the outer blower fan of corresponding air-conditioning to control the start and stop of the outer blower fan of air-conditioning, and then outside having realized under varying environment temperature conditions air-conditioning, blower fan carries out corresponding on off control to adjust the ability output of air-conditioner, thereby the indoor heat exchanger frosting of air-conditioner while avoiding freezing under low temperature environment, improve refrigeration and guarantee that compressor is not damaged to extend its service life in the situation that of normal operation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. an air-conditioner capacity regulating control method, is characterized in that, described air-conditioner capacity regulating control method comprises the following steps:
According to user preset temperature value, outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value, generate corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal;
According to described user preset temperature digital voltage signal, described outdoor heat exchanger return air temperature digital voltage signal and described indoor heat exchanger return air temperature digital voltage signal, obtain the start-stop time ratio of the outer blower fan of air-conditioning;
According to the start and stop of the outer blower fan of described start-stop time proportion control air-conditioning.
2. air-conditioner capacity regulating control method as claimed in claim 1, it is characterized in that, the described step that generates corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal, indoor heat exchanger return air temperature digital voltage signal according to user preset temperature value, outdoor heat exchanger return air inlet temperature value, indoor heat exchanger return air inlet temperature value specifically comprises the following steps:
Sensing chamber's external heat exchanger return air inlet temperature and indoor heat exchanger return air inlet temperature also generate respectively corresponding outdoor heat exchanger return air temperature voltage signal and indoor heat exchanger return air temperature voltage signal;
According to described outdoor heat exchanger return air temperature voltage signal and described indoor heat exchanger return air temperature voltage signal, obtain respectively outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value;
According to user preset temperature value, described outdoor heat exchanger return air inlet temperature value and described indoor heat exchanger return air inlet temperature value, generate respectively corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal.
3. air-conditioner capacity regulating control method as claimed in claim 2, it is characterized in that, the described step of obtaining the start-stop time ratio of the outer blower fan of air-conditioning according to described user preset temperature digital voltage signal, described outdoor heat exchanger return air temperature digital voltage signal, described indoor heat exchanger return air temperature digital voltage signal specifically comprises the following steps:
According to described user preset temperature digital voltage signal, described outdoor heat exchanger return air temperature digital voltage signal and described indoor heat exchanger return air temperature digital voltage signal, calculate the target output capacity of air-conditioner;
The ratio that accounts for the maximum output capacity of air-conditioner according to described target output capacity is set the outer blower fan start-stop time ratio of air-conditioning.
4. air-conditioner capacity regulating control method as claimed in claim 3, is characterized in that, the described step according to the start and stop of the outer blower fan of described start-stop time proportion control air-conditioning specifically comprises the following steps:
According to the outer blower fan start-stop time ratio of described air-conditioning, generate the pulse signal with corresponding dutycycle;
According to described pulse signal, with special time loop cycle, control the startup of the outer blower fan of air-conditioning and close down.
5. an air-conditioner capacity regulating control system, is characterized in that, described air-conditioner capacity regulating control system comprises:
Temperature analysis module, for generating corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal according to user preset temperature value, outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value;
Start-stop time acquisition module, for obtaining the start-stop time ratio of the outer blower fan of air-conditioning according to described user preset temperature digital voltage signal, described outdoor heat exchanger return air temperature digital voltage signal and described indoor heat exchanger return air temperature digital voltage signal;
The outer blower fan control module of air-conditioning, for according to the start and stop of the outer blower fan of described start-stop time proportion control air-conditioning.
6. air-conditioner capacity regulating control system as claimed in claim 5, is characterized in that, described temperature analysis module comprises:
The first temperature sensing unit, for detection of outdoor heat exchanger return air inlet temperature and generate corresponding outdoor heat exchanger return air temperature voltage signal;
The second temperature sensing unit, for detection of indoor heat exchanger return air inlet temperature and generate corresponding indoor heat exchanger return air temperature voltage signal;
Temperature value acquiring unit, for obtaining respectively outdoor heat exchanger return air inlet temperature value and indoor heat exchanger return air inlet temperature value according to described outdoor heat exchanger return air temperature voltage signal and described indoor heat exchanger return air temperature voltage signal;
Digital voltage signal generation unit, for generating respectively corresponding user preset temperature digital voltage signal, outdoor heat exchanger return air temperature digital voltage signal and indoor heat exchanger return air temperature digital voltage signal according to user preset temperature value, described outdoor heat exchanger return air inlet temperature value and described indoor heat exchanger return air inlet temperature value.
7. air-conditioner capacity regulating control system as claimed in claim 6, is characterized in that, described start-stop time acquisition module comprises:
Output capacity computing unit, for calculating the target output capacity of air-conditioner according to described user preset temperature digital voltage signal, described outdoor heat exchanger return air temperature digital voltage signal and described indoor heat exchanger return air temperature digital voltage signal;
Start-stop time setup unit, sets the outer blower fan start-stop time ratio of air-conditioning for account for the ratio of the maximum output capacity of air-conditioner according to described target output capacity.
8. air-conditioner capacity regulating control system as claimed in claim 7, is characterized in that, the outer blower fan control module of described air-conditioning comprises:
Pulse signal generation unit, for generating the pulse signal with corresponding dutycycle according to the outer blower fan start-stop time ratio of described air-conditioning;
Outer blower fan control module, for controlling the startup of the outer blower fan of air-conditioning and close down with special time loop cycle according to described pulse signal.
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