CN102967027A - Control method for inverter heat pump air conditioner - Google Patents
Control method for inverter heat pump air conditioner Download PDFInfo
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Abstract
The invention relates to the control technology aiming at air conditioners, discloses a control method for an inverter heat pump air conditioner, and solves the problem that a control manner for refrigeration and heating modes of the inverter heat pump air conditioner easily influences the user comfort of the traditional technology. The scheme of the invention is summarized as follows: in the heating mode, judging if the working frequency of a compressor is required to be limited or not and judging if the rotating speed of an indoor fan is required to be regulated according to the difference between the present indoor temperature and the predetermined temperature; and in the refrigeration mode, synthetically judging if the working frequency of a compressor is required to be limited or not and judging if the rotating speed of the indoor fan is required to be regulated according to the difference between the present indoor temperature and the predetermined temperature and the humidity of the present indoor environment. The control method for the inverter heat pump air conditioner, disclosed by the invention, is suitable for controlling the inverter heat pump air conditioner in the refrigeration and heating modes.
Description
Technical field
The present invention relates to the control technology for air-conditioning, specifically, relate to a kind of frequency conversion heat pump air conditioning control method.
Background technology
The frequency conversion heat pump air-conditioning is under refrigeration, heating mode at present, when indoor environment temperature reaches or near design temperature the time, because heat exchange load reduction, simultaneously in order to keep the stable of indoor environment temperature, the highest operating frequency of general meeting limit compression machine in control, make compressor transfer low frequency running to by high frequency, thereby also make the frequency conversion heat pump air-conditioning play energy-conservation effect under the condition of design temperature satisfying.
But under present this control model, although it is stable that indoor environment temperature can reach, the running of compressor low frequency also can be played energy-saving effect, but the matching status when still being in former compressor high frequency running owing to the indoor fan rotating speed, can affect user's comfortableness, be mainly reflected in: 1, for balance heat exchange load, inevitable respective chamber/chambers inner blower runs up during the running of compressor high frequency, and when indoor heat exchange load reduction, when compressor transfers the low frequency running to, running up of indoor fan will do not mated with the low frequency running of compressor, and leaving air temp is higher when causing the frequency conversion heat pump air conditioner refrigerating, leaving air temp is on the low side when heating, thereby affects consumer's comfortableness; 2, when the compressor low frequency turns round, indoor fan runs up and not only can not improve the heat exchange amount, and the room noise that the running up of rather long brought also can affect user's subjective feeling, also can bring simultaneously power consumption to increase; 3, present control method is when the frequency conversion heat pump air conditioner refrigerating, do not take into account indoor relative humidity to user's impact, under refrigeration mode, although indoor environment temperature reaches or near design temperature, still can be larger at some regional indoor relative humiditys, if limit merely, reduce the compressor operation frequency by present control mode, the effect on moisture extraction of air-conditioner is reduced, even indoor relative humidity is raise on the contrary, have a strong impact on consumer's comfortableness.
Summary of the invention
Technical problem to be solved by this invention is: propose a kind of frequency conversion heat pump air conditioning control method, solve in the conventional art in the problem that the control mode of frequency conversion heat pump air-conditioning under refrigeration, heating mode is affected easily user's comfortableness.
The present invention solves the problems of the technologies described above the technical scheme that adopts:
The frequency conversion heat pump air conditioning control method comprises:
A. after the frequency conversion heat pump air-conditioning start operation, its mode of operation is judged, if be refrigeration mode, then entered step b, if be heating mode, then enter step c;
B. calculate the running time of frequency conversion heat pump air-conditioning under refrigeration mode, when reach predetermined threshold value running time, current whether needs are limit frequently the operating frequency of compressor according to the difference of current indoor temperature and design temperature and current indoor relative humidity synthetic determination, whether need the indoor fan rotating speed to be adjusted process ends;
C. calculate the running time of frequency conversion heat pump air-conditioning under heating mode, when reach predetermined threshold value running time, judge according to the difference of current indoor temperature and design temperature current whether needs are limit frequently the operating frequency of compressor, whether need the indoor fan rotating speed to be adjusted process ends.
Further, step b specifically comprises: calculate the running time of frequency conversion heat pump air-conditioning under refrigeration mode, when reach predetermined threshold value running time, according to the current whether needs of following condition criterion the operating frequency of compressor is limit frequently, whether need the indoor fan rotating speed is adjusted:
If b1. the difference of current indoor temperature and preset temperature 〉=2 ℃ are not then limit frequently the operating frequency of compressor, the current rotating speed of indoor fan is not adjusted;
If the difference of b2. 1 ℃≤current indoor temperature and preset temperature＜2 ℃ is not then limit frequently the operating frequency of compressor, but the indoor fan rotating speed is reduced to than the low gear of current indoor fan rotating speed, and minimumly moves for low-grade location;
If the difference of current indoor temperature and preset temperature＜1 ℃ b3., and current indoor relative humidity 〉=70%, then the operating frequency of compressor is not limit frequently, but the indoor fan rotating speed is reduced to than at most low two gears of current indoor fan rotating speed, and minimumly move for low gear;
If the difference of current indoor temperature and preset temperature＜1 ℃ b4., and current indoor relative humidity＜70%, then the operating frequency of compressor is limit frequently, simultaneously the indoor fan rotating speed is reduced to than at most low two gears of current indoor fan rotating speed, and minimumly move for low gear.
Further, step c specifically comprises: calculate the running time of frequency conversion heat pump air-conditioning under heating mode, when reach predetermined threshold value running time, according to the current whether needs of following condition criterion the operating frequency of compressor is limit frequently, whether need the indoor fan rotating speed is adjusted:
If c1. the difference of current indoor temperature and preset temperature 〉=3 ℃ are not then limit frequently the operating frequency of compressor, the current rotating speed of indoor fan is not adjusted;
If the difference of c2. 1 ℃≤current indoor temperature and preset temperature＜3 ℃ is not then limit frequently the operating frequency of compressor, but the indoor fan rotating speed is reduced to than the low gear of current indoor fan rotating speed, and minimumly moves for low gear;
If c3. the difference of current indoor temperature and preset temperature＜1 ℃ is then limit frequently the operating frequency of compressor, simultaneously the indoor fan rotating speed is reduced to than at most low two gears of current indoor fan rotating speed, and minimumly moves for low gear.
Concrete, described operating frequency to compressor is limit and is frequently referred to: the highest frequency of limit compression machine work at present; In step b4, if the difference of current indoor temperature and preset temperature＜1 ℃, and current indoor relative humidity＜70%, then the highest frequency with the compressor work at present is restricted to 40Hz; In step c3, if the difference of current indoor temperature and preset temperature＜1 ℃, then the highest frequency with the compressor work at present is restricted to 40Hz.
Concrete, among step b2 and the step c2, described the indoor fan rotating speed is reduced to than the low gear of current indoor fan rotating speed, and minimumly refers to for the low-grade location operation: if current indoor fan rotating speed is high gear, then it is adjusted into the middling speed gear and moves; If current indoor fan rotating speed is the middling speed gear, then it is adjusted into the low gear operation; If current indoor fan rotating speed is low gear or lower speed stage, then keep its current rotation speed of fan operation.
Concrete, among step b3, step b4 and the step c3, described the indoor fan rotating speed is reduced to than at most low two gears of current indoor fan rotating speed, and minimumly refers to for the low-grade location operation: if current indoor fan rotating speed is high gear, then it is adjusted into low gear and moves; If current indoor fan rotating speed is the middling speed gear, then it is adjusted into the low gear operation; If current indoor fan rotating speed is low gear or lower speed stage, then keep current rotation speed of fan operation.
Need to prove that such scheme of the present invention is only applicable to the control of frequency conversion heat pump air-conditioning under refrigeration or heating mode, if the frequency conversion heat pump air-conditioning work in other pattern (as: dehumidifying, air-supply etc.), then directly adopts existing control mode to get final product.
The invention has the beneficial effects as follows: under heating mode, judge according to the difference of current indoor temperature and design temperature current whether needs are limit frequently the operating frequency of compressor, whether need the indoor fan rotating speed is adjusted; Under refrigeration mode, except the difference of considering current indoor temperature and design temperature, also consider the humidity of current indoor environment, and then synthetic determination current whether needs the operating frequency of compressor is limit frequency, whether need the indoor fan rotating speed is adjusted; Adopt above measure, try one's best so that the operating frequency of compressor and rotation speed of fan mate, to reduce the indoor fan noise, to reduce power consumption, to improve user's subjective feeling and comfortableness.
Description of drawings
Fig. 1 is the flow chart of control method embodiment of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
Annotate: " at a high speed " " middling speed " " low speed " described in the present invention is the wind-speed gear of air-conditioner, and general air-conditioner possesses four gears, that is: high gear, middling speed gear, low gear, dead slow speed gear; " temperature difference " refers to the difference between current indoor temperature and the design temperature among Fig. 1, namely | and indoor temperature-design temperature |.
As shown in Figure 1, the control method to the frequency conversion heat pump air-conditioning adopts following steps to realize in this example:
A. after the frequency conversion heat pump air-conditioning start operation, at first judge whether to be in refrigeration, heat or other operational mode, if be other operational mode, then directly get final product according to the control mode control to corresponding modes in the prior art, if be refrigeration mode, execution in step b then, if be heating mode, execution in step c then;
B. the frequency conversion heat pump air-conditioning is if the refrigeration mode operation, calculate its running time, surpass certain hour (such as 20 minutes) when running time, according to difference range and the indoor relative humidity of indoor temperature and design temperature, determine whether whether the operating frequency of compressor is limit frequently and the rotating speed gear of indoor fan is adjusted:
B1. when satisfying: | indoor temperature-design temperature | 〉=2 ℃, then the operating frequency of compressor is not limit frequently, the current rotating speed of indoor fan is not adjusted, namely keep the rotating speed operation of current indoor fan;
B2. when satisfying: 1 ℃≤| indoor temperature-design temperature |＜2 ℃, then the operating frequency of compressor do not limited, but the operating air velocity of indoor fan is adjusted to than low 1 grade of current wind speed, and minimum be low speed: if current wind speed then is reduced to wind speed middling speed for high speed; If current wind speed is middling speed, then wind speed is reduced to low speed; If the current running wind speed of air-conditioning is low speed even lower than low speed, then keep current operating air velocity constant;
B3. when satisfying: | indoor temperature-design temperature |＜1 ℃ and indoor relative humidity 〉=70%, owing to also need to dehumidify, then the operating frequency of compressor do not limited, but the running air rate adjustment of indoor fan is extremely hanged down 2 grades at most than current wind speed, and minimum is low speed: if current wind speed is then skipped middling speed and directly is reduced to low speed at a high speed; If current wind speed is middling speed, then only reduce by 1 grade to low speed; If the current running wind speed of air-conditioning is lower than low speed, then keep its operating air velocity constant;
B4. when satisfying: | indoor temperature-design temperature |＜1 ℃ and indoor relative humidity ﹤ 70%, then compressor is limit frequently to moving such as the highest 40Hz, air rate adjustment with indoor fan extremely hangs down 2 grades at most than current wind speed simultaneously, and minimum is low cruise: if current wind speed is then skipped middling speed and is reduced to low speed at a high speed; If current wind speed is middling speed, then only reduce by 1 grade to low speed; If the current running wind speed of air-conditioning is low speed even lower than low speed, then keep its operating air velocity constant;
C. the frequency conversion heat pump air-conditioning is if the heating mode operation, calculate its running time, surpass when running time (such as 40 minutes), according to the difference range of indoor temperature and design temperature, determine whether and need to limit frequently and whether need the rotating speed gear of indoor fan is adjusted accordingly the operating frequency of compressor:
C1. when satisfying: | design temperature-indoor temperature | 〉=3 ℃, then the operating frequency of compressor is not limit frequently, the current rotating speed of indoor fan is not adjusted;
C2. when satisfying: 1 ℃≤| design temperature-indoor temperature |＜3 ℃, then the operating frequency of compressor do not limited, but the operating air velocity of indoor fan is adjusted to than low 1 grade of current wind speed, and minimum be low cruise: if current wind speed then is reduced to middling speed for high speed; If current wind speed is middling speed, then be reduced to low speed; If the current running wind speed of air-conditioning is low speed even lower than low speed, then keep current operating air velocity constant;
C3. when satisfying: | design temperature-indoor temperature |＜1 ℃, then the operating frequency of compressor is limit frequently to moving such as the highest 40Hz, air rate adjustment with indoor fan extremely hangs down 2 grades at most than current wind speed simultaneously, and minimum is low cruise: if current wind speed is then skipped middling speed and is reduced to low speed at a high speed; If current wind speed is middling speed, then only reduce by 1 grade to low speed; If the current running wind speed of air-conditioning is low speed even lower than low speed, then operating air velocity is constant.
The claimed technical scheme of the present invention comprises but is not limited only to above-described embodiment, and those skilled in the art expects easily that according to the above-mentioned description of this invention some are equal to replacement/modification, and it is all within the protection domain that belongs under the Spirit Essence of the present invention.
Claims (9)
1. the frequency conversion heat pump air conditioning control method is characterized in that, may further comprise the steps:
A. after the frequency conversion heat pump air-conditioning start operation, its mode of operation is judged, if be refrigeration mode, then entered step b, if be heating mode, then enter step c;
B. calculate the running time of frequency conversion heat pump air-conditioning under refrigeration mode, when reach predetermined threshold value running time, current whether needs are limit frequently the operating frequency of compressor according to the difference of current indoor temperature and design temperature and current indoor relative humidity synthetic determination, whether need the indoor fan rotating speed to be adjusted process ends;
C. calculate the running time of frequency conversion heat pump air-conditioning under heating mode, when reach predetermined threshold value running time, judge according to the difference of current indoor temperature and design temperature current whether needs are limit frequently the operating frequency of compressor, whether need the indoor fan rotating speed to be adjusted process ends.
2. frequency conversion heat pump air conditioning control method as claimed in claim 1, it is characterized in that, step b specifically comprises: calculate the running time of frequency conversion heat pump air-conditioning under refrigeration mode, when reach predetermined threshold value running time, according to the current whether needs of following condition criterion the operating frequency of compressor is limit frequently, whether is needed the indoor fan rotating speed is adjusted:
If b1. the difference of current indoor temperature and preset temperature 〉=2 ℃ are not then limit frequently the operating frequency of compressor, the current rotating speed of indoor fan is not adjusted;
If the difference of b2. 1 ℃≤current indoor temperature and preset temperature＜2 ℃ is not then limit frequently the operating frequency of compressor, but the indoor fan rotating speed is reduced to than the low gear of current indoor fan rotating speed, and minimumly moves for low-grade location;
If the difference of current indoor temperature and preset temperature＜1 ℃ b3., and current indoor relative humidity 〉=70%, then the operating frequency of compressor is not limit frequently, but the indoor fan rotating speed is reduced to than at most low two gears of current indoor fan rotating speed, and minimumly move for low gear;
If the difference of current indoor temperature and preset temperature＜1 ℃ b4., and current indoor relative humidity＜70%, then the operating frequency of compressor is limit frequently, simultaneously the indoor fan rotating speed is reduced to than at most low two gears of current indoor fan rotating speed, and minimumly move for low gear.
3. frequency conversion heat pump air conditioning control method as claimed in claim 2 is characterized in that, described operating frequency to compressor is limit and frequently referred to: the highest frequency of limit compression machine work at present; In step b4, if the difference of current indoor temperature and preset temperature＜1 ℃, and current indoor relative humidity＜70%, then the highest frequency with the compressor work at present is restricted to 40Hz.
4. frequency conversion heat pump air conditioning control method as claimed in claim 2, it is characterized in that, among the step b2, the described indoor fan rotating speed is reduced to than current indoor fan rotating speed hanged down a gear, and minimumly refer to for low-grade location operation: if current indoor fan rotating speed is high gear, then it is adjusted into the operation of middling speed gear; If current indoor fan rotating speed is the middling speed gear, then it is adjusted into the low gear operation; If current indoor fan rotating speed is low gear or lower speed stage, then keep its current rotation speed of fan operation.
5. frequency conversion heat pump air conditioning control method as claimed in claim 2, it is characterized in that, among step b3 and the step b4, the described indoor fan rotating speed is reduced to than current indoor fan rotating speed hanged down at most two gears, and minimumly refer to for low-grade location operation: if current indoor fan rotating speed is high gear, then it is adjusted into the low gear operation; If current indoor fan rotating speed is the middling speed gear, then it is adjusted into the low gear operation; If current indoor fan rotating speed is low gear or lower speed stage, then keep current rotation speed of fan operation.
6. frequency conversion heat pump air conditioning control method as claimed in claim 1, it is characterized in that, step c specifically comprises: calculate the running time of frequency conversion heat pump air-conditioning under heating mode, when reach predetermined threshold value running time, according to the current whether needs of following condition criterion the operating frequency of compressor is limit frequently, whether is needed the indoor fan rotating speed is adjusted:
If c1. the difference of current indoor temperature and preset temperature 〉=3 ℃ are not then limit frequently the operating frequency of compressor, the current rotating speed of indoor fan is not adjusted;
If the difference of c2. 1 ℃≤current indoor temperature and preset temperature＜3 ℃ is not then limit frequently the operating frequency of compressor, but the indoor fan rotating speed is reduced to than the low gear of current indoor fan rotating speed, and minimumly moves for low gear;
If c3. the difference of current indoor temperature and preset temperature＜1 ℃ is then limit frequently the operating frequency of compressor, simultaneously the indoor fan rotating speed is reduced to than at most low two gears of current indoor fan rotating speed, and minimumly moves for low gear.
7. frequency conversion heat pump air conditioning control method as claimed in claim 6 is characterized in that, in step c3, if the difference of current indoor temperature and preset temperature＜1 ℃, then the highest frequency with the compressor work at present is restricted to 40Hz.
8. frequency conversion heat pump air conditioning control method as claimed in claim 6, it is characterized in that, among the step c2, the described indoor fan rotating speed is reduced to than current indoor fan rotating speed hanged down a gear, and minimumly refer to for low-grade location operation: if current indoor fan rotating speed is high gear, then it is adjusted into the operation of middling speed gear; If current indoor fan rotating speed is the middling speed gear, then it is adjusted into the low gear operation; If current indoor fan rotating speed is low gear or lower speed stage, then keep its current rotation speed of fan operation.
9. frequency conversion heat pump air conditioning control method as claimed in claim 6, it is characterized in that, among the step c3, the described indoor fan rotating speed is reduced to than current indoor fan rotating speed hanged down at most two gears, and minimumly refer to for low-grade location operation: if current indoor fan rotating speed is high gear, then it is adjusted into the low gear operation; If current indoor fan rotating speed is the middling speed gear, then it is adjusted into the low gear operation; If current indoor fan rotating speed is low gear or lower speed stage, then keep current rotation speed of fan operation.
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