CN101726072B - Control mode of low-temperature heating of variable frequency air conditioner - Google Patents
Control mode of low-temperature heating of variable frequency air conditioner Download PDFInfo
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- CN101726072B CN101726072B CN2008102241878A CN200810224187A CN101726072B CN 101726072 B CN101726072 B CN 101726072B CN 2008102241878 A CN2008102241878 A CN 2008102241878A CN 200810224187 A CN200810224187 A CN 200810224187A CN 101726072 B CN101726072 B CN 101726072B
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Abstract
The invention relates to a method for controlling the operation of an air conditioner, in particular to a control mode of the low-temperature heating of a variable frequency air conditioner. The control mode comprises the following steps of: setting a control module in a storage of a control circuit board of the air conditioner, wherein the control module comprises a control demand for controlling the air conditioner at the defrosting operation state, the control demand is used for controlling the operation frequency of a compressor in the air conditioner,, the reversing of a reversing valve, the opening of an expansion valve, the rotation speed, the turn-on and the turn-off of an indoor fan and an outdoor fan; controlling the signal input and the signal output of the circuit board by the control module according to a set program; according to the control demand of the control module, controlling the signal input end of the circuit board; after receiving the signal of starting the defrosting operation state sent by a control panel of the air conditioner or a remote controller, sequentially outputting the control signal to the compressor, the reversing valve, the expansion valve, the indoor fan and the outdoor fan by the different signal output ends of the control circuit board, to operate according to the defrosting operation state. By adopting the control mode, the defrosting time of the air conditioner is shortened, and the heating efficiency is improved.
Description
Technical field
The present invention relates to a kind of method of controlling the air-conditioner operation, be specifically related to design a kind of control air-conditioner, the method for under the Defrost operation state, moving.
Background technology
At present, in the very low situation of outdoor environment temperature, the easy frosting of the off-premises station of air-conditioner causes the air-conditioning heat exchange insufficient, and heating effect is very poor, solves the difficult problem that the low problem of air conditioner low temperature heating amount becomes each air conditioning system maker.Existing air-conditioning manufacturing enterprise; common control mode all is when low-temperature heating; employing detects coil temperature in the off-premises station by sensor, and when the temperature of coil pipe is very low, air-conditioner will enter the Defrost operation state automatically; after air-conditioner enters the Defrost operation state; compressor need to be shut down after one minute and again to be started operation and carry out defrost, compressor operating only during the defrosting, and inside and outside blower fan shuts down; compressor will be shut down one minute again after defrosting finishes, and then heat entering.Air-conditioner " stops " process of the work that heats to user Lai Shuoshi in whole defrost process, the defrosting cycle of adding so existing air-conditioner is longer, affect the heating effect of air-conditioner, control air-conditioner for a long time in the process of operation heating capacity mean value very low.
Existing convertible frequency air-conditioner moves according to a frequency in whole heating process, and the running frequency of compressor can only be regulated automatically by the selection of temperature section.CPU on the master control circuit board of air-conditioner; the temperature signal that receives the collection of defrosting sensor reaches when defrosting temperature; master control circuit board output control signal; the control air-conditioner enters the defrosting duty; compressor will be shut down after air-conditioner entered defrosting; cross valve commutation after 55 seconds; compressor starts again after 5 seconds; this moment, the running frequency of compressor will be from the 0HZ raising frequency to 58HZ; then raising frequency is to the high frequency of setting again after operation half a minute with 58HZ, and whole raising frequency process approximately needs about 2 minutes.Then withdraw from defrosting when reaching defrosting exit criteria or defrosting time, this moment, compressor stopped again, simultaneously outer blower fan is opened, and cross valve commutates again after 55 seconds, and compressor starts again after 5 seconds, operate under the heating mode with certain frequency, under heating mode, different according to the outer shroud temperature, the running frequency of compressor is also different, this moment, press also will be through the raising frequency time from 0HZ to the target frequency, and this process approximately also can need the time about 2 minutes.The sequential chart of whole defrosting as shown in Figure 1.Because in whole defrost process; the running frequency of compressor will be passed through; twice raising frequency process and twice stopping process from 0HZ to the target frequency; said process approximately needs 5-6 minute time; therefore during this period of time the air-conditioning heating ability is 0 or very low, controls to such an extent that the defrosting cycle of air-conditioner is longer.For above-mentioned reasons, air-conditioner is when outdoor environment temperature is low, and its heating effect is with relatively poor.In view of the above problems, be necessary the control procedure under the Defrost operation pattern of existing air-conditioner is carried out necessary improvement, to improve the heating efficiency of air-conditioner.
Summary of the invention
The object of the invention is to overcome defective of the prior art, design a kind of control method of low-temperature heating of variable frequency air conditioner.This control mode can be controlled air-conditioner when entering the defrosting mode operation, and compressor needn't be shut down, thereby can shorten the defrosting time of air-conditioner, because compressor remains under the running status in defrost process.Therefore can improve air-conditioner at the heating capacity of run duration, can control air-conditioner and be issued to good heating effect at the low state of outdoor temperature.
For achieving the above object, technical scheme of the present invention is to adopt a kind of control method of low-temperature heating of variable frequency air conditioner, comprises following control step:
S1: in the memory of air conditioner control circuit plate, control module is set, comprise the control instruction of control air-conditioner under the Defrost operation state in the described control module, described control instruction is used for controlling the running frequency of described air-conditioner compressor, the commutation of control reversal valve, the aperture of control expansion valve, the rotating speed of control room inner blower and outdoor fan and unlatching or stop;
S2: described control module is controlled signal input and the signal output of described control circuit board by setup program, control instruction according to described control module, the signal input part of described control circuit board, after receiving described air-conditioner control panel or remote controller and sending the signal that starts the Defrost operation state, the unlike signal output of described control circuit board will sequentially output a control signal to described compressor, reversal valve, expansion valve, indoor fan, outdoor fan; Wherein, the signal of described Defrost operation state comprises, under the air-conditioner holding state, send signal by guidance panel or remote controller, air-conditioner is set to heat, high wind, to heat Temperature Setting is high temperature, then continuous Push switch machine button several times within the several seconds, after the signal input part of described control circuit board receives above-mentioned signal, control instruction according to described control module, the signal output part output signal of described control circuit board, described signal are used for controlling described air-conditioner and move by the low-temperature test state;
S3: described compressor, reversal valve, expansion valve, indoor fan, outdoor fan are pressed the operation of Defrost operation state according to received control signal.
Wherein, in the described step of S1, the running frequency of described control compressor comprises that control compressor raising frequency or control compressor frequency reducing or control compressor keep running frequency to immobilize under the Defrost operation state.
Wherein, the low-temperature test state run signal of the signal output part of described control circuit board output comprises, controls described indoor fan by the signal of low-temperature test state wind speed operation, and the output of the anti-cold wind run signal of cancellation.
Wherein, control instruction according to described control module; described indoor fan is pressed low-temperature test state wind speed operation T1 section after the time; the signal output part of described control circuit board is exported the defrosting commencing signal again; described defrosting commencing signal comprises; controlling described indoor fan adds T3 and adds the T4 section time by shutting down T2 after the low-temperature test state wind speed operation several seconds again; after T2 adds T3 and adds the T4 section time; the signal output part of described control circuit board is exported the defrosting end signal again; described defrosting end signal comprises that described indoor fan is pressed the operation of low-temperature test state wind speed again after the several seconds.
Wherein, control instruction according to described control module, behind the signal output part output defrosting end signal of described control circuit board, if after the signal input part of described control circuit board received other operational order or shutdown control instruction that guidance panel or remote controller send again, the signal output part of described control circuit board stopped the output of low-temperature test signal.
Wherein, control instruction according to described module, the low-temperature test state run signal of the signal output part output of described control circuit board, also control described compressor by the first frequency operation T1 section time, the defrosting commencing signal of the signal output part output of described control circuit board, also control described reversal valve commutation, control described compressor and move the T2 section after the time by the second frequency that is higher than first frequency, control again described compressor and running frequency is reduced to the 3rd frequency that is lower than first frequency with the T3 section time, control again described compressor by the 3rd frequency operation T4 section time, the defrosting end signal of the signal output part output of described control circuit board, also described reversal valve again commutation after T2 adds T3 to add T4 section time sum, described compressor recovers to press the first frequency operation again by the 3rd frequency operation T4 section after the time.
Wherein, control instruction according to described module, the defrosting end signal of the signal output part output of described control circuit board, also control described expansion valve keeps V1 within the T5 section time fixedly aperture, and then controlling described expansion valve keeps V2 within the T6 section time fixedly aperture, described expansion valve was regulated according to the instruction of air conditioner heat-production state of a control after T5 added the T6 section time.
Wherein, execution instruction according to described module; the signal of the low-temperature test state operation of the signal output part output of described control circuit board; also control described outdoor fan by the low-temperature test state wind speed operation T1 section time; the defrosting commencing signal of the signal output part output of described control circuit board; also controlling described outdoor fan adds T3 and adds the T4 section time by shutting down T2 after the low-temperature test state wind speed operation several seconds again; the defrosting end signal of the signal output part output of described control circuit board; Delayed shutdown is after the several seconds more also to control described outdoor fan, and described outdoor fan continues to press the operation of low-temperature test state wind speed.
Wherein, described reversal valve is four-way change-over valve.
Advantage of the present invention and beneficial effect are; this control mode can be controlled air-conditioner after entering the defrosting mode operation; compressor needn't be shut down; and can make the operating frequency of compressor under the Defrost operation pattern higher; this not only can shorten the defrosting time of air-conditioner, because compressor remains under the running status in defrost process.Therefore can improve the heating capacity of air-conditioner during Defrost operation, can control air-conditioner and be issued to good heating effect at the low state of outdoor temperature.Below by the correction data in the table one the present invention's advantage compared with prior art can be described.
Table one
Description of drawings
Fig. 1 is defrost process sequential chart of the prior art;
Fig. 2 is defrost process sequential chart of the present invention;
Fig. 3 is defrost process flow chart of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
Shown in accompanying drawing 2 and accompanying drawing 3, implementation technical scheme of the present invention is, adopts a kind of control method of low-temperature heating of variable frequency air conditioner, and described control method comprises following control step:
The first step: control module (being solidificated in the control program in the initial stage in spring) is set in the memory of air conditioner control circuit plate, in described control module, comprise the every control instruction of control air-conditioner under the Defrost operation state, described control instruction is used for controlling the running frequency of described air-conditioner compressor, the commutation of control reversal valve, the aperture of control expansion valve, the rotating speed of control room inner blower and outdoor fan and unlatching or stop;
Second step: control control module described above, signal input and signal output by the described control circuit board of programme-control of setting, control instruction according to described control module, signal input part when described control circuit board, after receiving described air-conditioner control panel or remote controller and sending the signal that starts the Defrost operation state, the unlike signal output of described control circuit board will sequentially output a control signal to described compressor, reversal valve, expansion valve, indoor fan, outdoor fan;
The 3rd step: described compressor, reversal valve, expansion valve, indoor fan, outdoor fan are pressed the operation of Defrost operation state according to received control signal.
In the present embodiment, in the described step of S1, the running frequency of described control compressor comprises that control compressor raising frequency or control compressor frequency reducing or control compressor keep running frequency to immobilize under the Defrost operation state.
In the present embodiment, in the described step of S2, the signal of described Defrost operation state comprises, when air-conditioner is in holding state, send command signal by guidance panel or remote controller, can be set to heat by air-conditioner, and high wind, to heat Temperature Setting is more than 30 degree, then continuous Push switch machine button 7 times in 5 seconds, after the signal input part of described control circuit board receives above-mentioned last operation signal, the control instruction that the described control module realization of foundation sets, control to get the signal output part output control signal of described control circuit board, described control signal is used for controlling the compressor of described air-conditioner, reversal valve, expansion valve, indoor fan, outdoor fan is pressed the operation of low-temperature test state.
In the present embodiment, the low-temperature test state run signal of the signal output part of described control circuit board output comprises, controls described indoor fan by the control signal of low-temperature test state wind speed operation, and comprises the output control signal of the anti-cold wind run signal of cancellation.
In the present embodiment; control instruction according to described control module; described indoor fan is pressed low-temperature test state wind speed operation T1 section after the time; the signal output part of described control circuit board is exported defrosting beginning control signal again; described defrosting begins control signal and comprises; controlling described indoor fan shuts down T2 by low-temperature test state wind speed operation again and adds T3 and add the T4 section time after 5 seconds; indoor fan is shut down after T2 adds T3 and adds the T4 section time; control instruction according to described control module; the signal output part of described control circuit board is exported defrosting finishing control signal again; described defrosting end signal comprises that described indoor fan is pressed the operation of low-temperature test state wind speed again after 5 seconds.
In the present embodiment, control instruction according to described control module, behind the signal output part output defrosting end signal of described control circuit board, if after the signal input part of described control circuit board received other operational order or shutdown control instruction that guidance panel or remote controller send again, the signal output part of described control circuit board stopped the output of low-temperature test control signal.
In the present embodiment, control instruction according to described module, the low-temperature test state operation control signal of the signal output part output of described control circuit board, also control described compressor by the first frequency operation T1 section time, the defrosting of the signal output part output of described control circuit board begins control signal, also control described reversal valve commutation, control described compressor and move the T2 section after the time by the second frequency that is higher than first frequency, control again described compressor and running frequency is reduced to the 3rd frequency that is lower than first frequency with the T3 section time, control again described compressor by the 3rd frequency operation T4 section time, the defrosting end signal of the control signal output output of described control circuit board, also control the again commutation after T2 adds T3 to add T4 section time sum of described reversal valve, described compressor recovers to press the first frequency operation again by the 3rd frequency operation T4 section after the time.
In the present embodiment, control instruction according to described module, the defrosting end signal of the signal output part output of described control circuit board, also control described expansion valve keeps V1 within the T5 section time fixedly aperture, and then controlling described expansion valve keeps V2 within the T6 section time fixedly aperture, described expansion valve was regulated according to the instruction of air conditioner heat-production state of a control after T5 added the T6 section time.
In the present embodiment; execution instruction according to described module; the signal of the low-temperature test state operation of the signal output part output of described control circuit board; also control described outdoor fan by the low-temperature test state wind speed operation T1 section time; the defrosting commencing signal of the signal output part output of described control circuit board; also controlling described outdoor fan adds T3 and adds the T4 section time by shutting down T2 after the low-temperature test state wind speed operation several seconds again; the defrosting end signal of the signal output part output of described control circuit board; Delayed shutdown is after the several seconds more also to control described outdoor fan, and described outdoor fan continues to press the operation of low-temperature test state wind speed.
In the present embodiment, the described reversal valve of best mode adopts four-way change-over valve.
Embodiment 1
Entry condition:
Under the complete machine holding state, heat high wind, set 30 degree with the remote controller remote control, press the switch switch 7 times continuously in 5 seconds, last start enters the low-temperature condition test program.
The control function:
1) indoor set enters the low-temperature test state, controls by following function:
A) send low-temperature test status command (G byte G4 position in the communicaton protocol: 1 is the low-temperature test state, and 0 is common state) to off-premises station;
B) indoor fan is by low-temperature test state wind speed (definition is arranged in the internal memory) running, and the cold wind function is prevented in cancellation.Receive outdoor defrosting signal after 5 seconds, indoor fan is shut down, and receives the defrosting end signal after 5 seconds, and the indoor fan start is turned round with the low-temperature condition wind speed;
C) a kind of control circuit board receives any other remote signal or shutdown backed off after random test program again.
2) after off-premises station receives the indoor test programmed instruction, enter the low-temperature test state, it is as follows specifically to control function:
A) receive the indoor low temperature test signal, complete machine enters the low-temperature test state, by low temperature first frequency (definition is arranged in the internal memory) running, behind time T1 (definition is arranged in the internal memory), enters the defrosting running, simultaneously to indoor defrosting signal;
B) enter defrosting after, the cross valve commutation, outer machine turns round T2 (definition is arranged in the internal memory) after the time by defrosting second frequency (definition is arranged in the internal memory), reducing work frequency is to the 3rd frequency (definition is arranged in the internal memory) of cross valve commutation and keep T3 (definition is arranged in the internal memory), cross valve commutates again, withdraw from defrosting, wherein to be defrosting second frequencies decide with Speed Reduction to the cross valve of 1Hz/s needed time of the 3rd frequency of commutating the length of time T 3, compressor was at front 2 minutes that press the low temperature first frequency and turn round after the defrosting, expansion valve keeps fixedly aperture of V1, valve kept fixedly aperture of V2 in 2 minutes to 4 minutes, regulate after 4 minutes, until the running T2 time enters the defrosting running again, circulate with this;
C) enter low-temperature test, outdoor fan turns round by low-temperature condition wind speed (definition is arranged in the internal memory).Enter defrosting after 2 seconds, outdoor fan is shut down, and defrosting finishes outdoor fan start after 2 seconds;
D) enter defrosting after 2 seconds, expansion valve reaches defrosting aperture (definition is arranged in the internal memory), after defrosting is withdrawed from 2 seconds, by common running status running.
The advantage of above-described embodiment is; this control mode can be controlled air-conditioner after entering the defrosting mode operation; compressor needn't be shut down; and the operating frequency of compressor under the Defrost operation pattern is higher; this not only can shorten the defrosting time of air-conditioner, because compressor remains under the running status in defrost process.Therefore can improve the heating capacity of air-conditioner during Defrost operation, can control air-conditioner and be issued to good heating effect at the low state of outdoor temperature.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. the control method of a low-temperature heating of variable frequency air conditioner is characterized in that, comprises following control step:
S1: in the memory of air conditioner control circuit plate, control module is set, comprise the control instruction of control air-conditioner under the Defrost operation state in the described control module, described control instruction is used for controlling the running frequency of described air-conditioner compressor, the commutation of control reversal valve, the aperture of control expansion valve, the rotating speed of control room inner blower and outdoor fan and unlatching or stop;
S2: described control module is controlled signal input and the signal output of described control circuit board by setup program, control instruction according to described control module, the signal input part of described control circuit board, after receiving described air-conditioner control panel or remote controller and sending the signal that starts the Defrost operation state, the unlike signal output of described control circuit board will sequentially output a control signal to described compressor, reversal valve, expansion valve, indoor fan, outdoor fan; Wherein, the signal of described Defrost operation state comprises, under the air-conditioner holding state, send signal by guidance panel or remote controller, air-conditioner is set to heat, high wind, to heat Temperature Setting is high temperature, then continuous Push switch machine button several times within the several seconds, after the signal input part of described control circuit board receives above-mentioned signal, control instruction according to described control module, the signal output part output signal of described control circuit board, described signal are used for controlling described air-conditioner and move by the low-temperature test state;
S3: described compressor, reversal valve, expansion valve, indoor fan, outdoor fan are pressed the operation of Defrost operation state according to received control signal.
2. the control method of low-temperature heating of variable frequency air conditioner as claimed in claim 1, it is characterized in that, in the described step of S1, the running frequency of described control compressor comprises that control compressor raising frequency or control compressor frequency reducing or control compressor keep running frequency to immobilize under the Defrost operation state.
3. the control method of low-temperature heating of variable frequency air conditioner as claimed in claim 1, it is characterized in that, the low-temperature test state run signal of the signal output part output of described control circuit board comprises, control described indoor fan by the signal of low-temperature test state wind speed operation, and the output of the anti-cold wind run signal of cancellation.
4. the control method of low-temperature heating of variable frequency air conditioner as claimed in claim 3; it is characterized in that; control instruction according to described control module; described indoor fan is pressed low-temperature test state wind speed operation T1 section after the time; the signal output part of described control circuit board is exported the defrosting commencing signal again; described defrosting commencing signal comprises; controlling described indoor fan adds T3 and adds the T4 section time by shutting down T2 after the low-temperature test state wind speed operation several seconds again; after T2 adds T3 and adds the T4 section time; the signal output part of described control circuit board is exported the defrosting end signal again; described defrosting end signal comprises that described indoor fan is pressed the operation of low-temperature test state wind speed again after the several seconds.
5. the control method of low-temperature heating of variable frequency air conditioner as claimed in claim 4, it is characterized in that, control instruction according to described control module, behind the signal output part output defrosting end signal of described control circuit board, if after the signal input part of described control circuit board received other operational order or shutdown control instruction that guidance panel or remote controller send again, the signal output part of described control circuit board stopped the output of low-temperature test signal.
6. the control method of low-temperature heating of variable frequency air conditioner as claimed in claim 4, it is characterized in that, control instruction according to described module, the low-temperature test state run signal of the signal output part output of described control circuit board, also control described compressor by the first frequency operation T1 section time, the defrosting commencing signal of the signal output part output of described control circuit board, also control described reversal valve commutation, control described compressor and move the T2 section after the time by the second frequency that is higher than first frequency, control again described compressor and running frequency is reduced to the 3rd frequency that is lower than first frequency with the T3 section time, control again described compressor by the 3rd frequency operation T4 section time, the defrosting end signal of the signal output part output of described control circuit board, also control the again commutation after T2 adds T3 to add T4 section time sum of described reversal valve, described compressor recovers to press the first frequency operation again by the 3rd frequency operation T4 section after the time.
7. the control method of low-temperature heating of variable frequency air conditioner as claimed in claim 6, it is characterized in that, control instruction according to described module, the defrosting end signal of the signal output part output of described control circuit board, also control described expansion valve keeps V1 within the T5 section time fixedly aperture, and then controlling described expansion valve keeps V2 within the T6 section time fixedly aperture, described expansion valve was regulated according to the instruction of air conditioner heat-production state of a control after T5 added the T6 section time.
8. the control method of low-temperature heating of variable frequency air conditioner as claimed in claim 4; it is characterized in that; execution instruction according to described module; the signal of the low-temperature test state operation of the signal output part output of described control circuit board; also control described outdoor fan by the low-temperature test state wind speed operation T1 section time; the defrosting commencing signal of the signal output part output of described control circuit board; also controlling described outdoor fan adds T3 and adds the T4 section time by shutting down T2 after the low-temperature test state wind speed operation several seconds again; the defrosting end signal of the signal output part output of described control circuit board; Delayed shutdown is after the several seconds more also to control described outdoor fan, and described outdoor fan continues to press the operation of low-temperature test state wind speed.
9. such as the control method of each described low-temperature heating of variable frequency air conditioner of claim 1 to 8, it is characterized in that described reversal valve is four-way change-over valve.
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