CN104214905A - Air conditioner and controlling method thereof - Google Patents
Air conditioner and controlling method thereof Download PDFInfo
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- CN104214905A CN104214905A CN201310213792.6A CN201310213792A CN104214905A CN 104214905 A CN104214905 A CN 104214905A CN 201310213792 A CN201310213792 A CN 201310213792A CN 104214905 A CN104214905 A CN 104214905A
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Abstract
The invention provides an air conditioner and a controlling method thereof. The air conditioner is provided with a refrigerant loop formed by connecting a compressor, an indoor heat exchanger, an electric expansion valve and an outdoor heat exchanger. After the compressor is started, the opening degree of the electric expansion valve is set to the initial opening degree obtained according to the rotating speed of the compressor and the number of indoor units which are in operation. The opening degree of the electric expansion valve is controlled to be gradually reduced within each set time period in a stepped mode till the opening degree of the electric expansion valve reaches the target opening degree according to the temperature parameter detected by the refrigerant loop. According to the air conditioner, the number of the indoor units which are in operation is taken into consideration, and accordingly the high heating (refrigerating) capacity is achieved.
Description
Technical field
The present invention relates to a kind of air-conditioner and control method thereof, particularly relate to the air-conditioner and control method thereof that are connected with multiple stage indoor set.
Background technology
In patent document 1, disclose air-conditioner as shown in Figure 1, it forms refrigerant loop by compressor 1, cubic valve 2, indoor heat converter 3, electric expansion valve 4 and outdoor heat converter 5.And disclose by the aperture of electric expansion valve 4 from initial setting aperture to target aperture with stepwise within each stipulated time (Δ t ') reduce control method (as shown in Figure 2).But patent document 1 is 1 using the number of units of the indoor set be connected with off-premises station and considers as prerequisite.Do not consider the situation of the multi-gang air-conditioner being connected with multiple stage indoor set.The indoor set of multi-gang air-conditioner, the length of the pipe arrangement connected separately is different, or according to the kind of indoor set, (wall-hanging, air-cooled ducted air conditioner formula, uphill opening type etc.), the situation that the internal volume of indoor heat converter is not identical is very general.And even if the kind of indoor set is identical, the internal volume heating large its indoor heat converter of machine of (cold) ability is large, and the internal volume heating little its indoor heat converter of machine of (cold) ability is little.It is important for fully taking into account and heating the situation that the different machine of (cold) ability operates simultaneously.The number of units simultaneously operated is more, and pipe arrangement is longer, and the internal volume of indoor heat converter is larger, and it is longer that the circulation of refrigerant reaches the stable required time.If do not consider these factors and use the control method identical with known case (such as patent document 1) to control electric expansion valve, too short in the open hour (Δ t) of the electric expansion valve of regulation aperture, can have problems: when the circulation of refrigerant does not also reach stable, entered the control of next ladder of staged adjustment, thus it is less able to make to heat (cold).
Patent document 1: Japanese Unexamined Patent Publication 5-196309
Summary of the invention
Therefore the present invention completes in view of the above problems, even if its object is to provide a kind of to connect multiple stage indoor set, also can reach higher and heat (cold) ability and the circulation of refrigerant reaches few air-conditioner of stable required time and manufacture method thereof.
Air-conditioner of the present invention, it is characterized in that, possess and connect compressor, indoor heat converter, electric expansion valve and outdoor heat converter and the refrigerant loop that forms, it is characterized in that, after described compressor start, the aperture of described electric expansion valve is set as the initial opening of trying to achieve according to compressor rotary speed and indoor set operating number, according to the temperature parameter detected by described refrigerant loop, control the aperture of described electric expansion valve, it is made stepwise to reduce gradually within each stipulated time, till reaching target aperture.
According to such structure, the operating number of connected indoor set can be considered, and reach higher and heat (cold) ability.
In addition, air-conditioner of the present invention, is characterized in that, while described indoor set, running beginning number of units is more, and the described stipulated time is controlled as longer.Thereby, it is possible to also reach higher when connecting multiple stage indoor set to heat (cold) ability.
In addition, air-conditioner of the present invention, is characterized in that, piping length identical in the performance of described indoor set is within the length of regulation, while described indoor set, running starts number of units and the value direct proportionality of described stipulated time.Thereby, it is possible to also reach higher when connecting multiple stage indoor set to heat (cold) ability.
In addition, air-conditioner of the present invention, it is characterized in that, there is refrigerant circulation detector that whether circulation of detection refrigerant is stable further, based on the information from described refrigerant circulation detector, control the value of described stipulated time in the mode making aperture reduce in a ladder after the stable circulation of refrigerant.Thereby, it is possible to ensure in whole aperture adjustment process, the flowing of refrigerant keeps stable.
In addition, air-conditioner of the present invention, it is characterized in that, described refrigerant circulation detector is thermistor additional near described compressor, described electric expansion valve or on other refrigerant loops, based on the temperature amplitude detected by described thermistor for necessarily or within the limits prescribed, thus judge that the circulation of refrigerant is stable.Thereby, it is possible to detect in real time the stability of refrigerant circulation, and whether stable and control the aperture of electric expansion valve according to refrigerant circulation, thus improve air-conditioner heat (cold) ability.
In addition, air-conditioner of the present invention, is characterized in that, the refrigerant temperature detected by thermistor, when raising set point of temperature within a certain period of time, increases the aperture of described electric expansion valve.Thereby, it is possible to make refrigerant circulation be adjusted to stable state from labile state in time, thus improve air-conditioner heat (cold) ability.
In addition, air-conditioner of the present invention, is characterized in that, the refrigerant temperature detected by thermistor, when raising 10 ~ 20 DEG C in 20 seconds, increases the aperture of described electric expansion valve.Thereby, it is possible to make refrigerant circulation be adjusted to stable state from labile state in time, thus improve air-conditioner heat (cold) ability.
Another object of the present invention is to the control method that a kind of air-conditioner is provided, described air-conditioner possesses connection compressor, indoor heat converter, electric expansion valve and outdoor heat converter and the refrigerant loop formed, it is characterized in that, after described compressor start, the aperture of described electric expansion valve is set as according to compressor rotary speed, and indoor set operating number and the initial opening of trying to achieve, according to the temperature parameter detected by described refrigerant loop, control the aperture of described electric expansion valve, it is made stepwise to reduce gradually within each stipulated time, till reaching target aperture.According to such setting, the operating number of connected indoor set and the temperature parameter in refrigerant loop can be considered, and reach higher and heat (cold) ability.
In addition, the control method of air-conditioner of the present invention, is characterized in that, while described indoor set, running beginning number of units is more, and the described stipulated time is controlled as longer.Thereby, it is possible to also reach higher when connecting multiple stage indoor set to heat (cold) ability.
In addition, the control method of air-conditioner of the present invention, is characterized in that, piping length identical in the performance of described indoor set is within the length of regulation, while described indoor set, running starts number of units and the value direct proportionality of described stipulated time.Thereby, it is possible to also reach higher when connecting multiple stage indoor set to heat (cold) ability.
In addition, the control method of air-conditioner of the present invention, it is characterized in that, described air-conditioner has further and detects the whether stable refrigerant circulation detector of the circulation of refrigerant, based on the information from described refrigerant circulation detector, control the value of described stipulated time in the mode making aperture reduce in a ladder after the stable circulation of refrigerant.Thereby, it is possible to ensure in whole aperture adjustment process, the flowing of refrigerant keeps stable.
In addition, the control method of air-conditioner of the present invention, it is characterized in that, described refrigerant circulation detector is thermistor additional near described compressor, described electric expansion valve or on other refrigerant loops, based on the temperature amplitude detected by described thermistor for necessarily or within the limits prescribed, thus judge that the circulation of refrigerant is stable.Thereby, it is possible to detect in real time the stability of refrigerant circulation, and whether stable and control the aperture of electric expansion valve according to refrigerant circulation, thus improve air-conditioner heat (cold) ability.
In addition, the control method of air-conditioner of the present invention, is characterized in that, the refrigerant temperature detected by thermistor, when raising set point of temperature within a certain period of time, increases the aperture of described electric expansion valve.Thereby, it is possible to make refrigerant circulation be adjusted to stable state from labile state in time, thus improve air-conditioner heat (cold) ability.
In addition, the control method of air-conditioner of the present invention, is characterized in that, the refrigerant temperature detected by thermistor, when raising 10 ~ 20 DEG C in 20 seconds, increases the aperture of described electric expansion valve.Thereby, it is possible to make refrigerant circulation be adjusted to stable state from labile state in time, thus improve air-conditioner heat (cold) ability.
The effect of invention
Air-conditioner of the present invention and control method thereof, consider the connection number of units of indoor set, and control the aperture of electric expansion valve, and judge by adding the function whether flowing of refrigerant is stable, in the start of run state of the flowing instability of refrigerant, can refrigerant circulation rapidly be carried out, thus improve air-conditioner heat (cold) ability.
Accompanying drawing explanation
Fig. 1 is the schematic diagram in the refrigerant loop of the air-conditioner of prior art.
Fig. 2 is the schematic diagram of the control method of the air-conditioner of prior art.
Fig. 3 is the schematic diagram in the refrigerant loop of air-conditioner of the present invention.
Fig. 4 is the schematic diagram of air-conditioner control method of the present invention.
Fig. 5 is by the figure of (cold) ability that heats compared with the air-conditioner of prior art of air-conditioner of the present invention.
Fig. 6 represents in air-conditioner control method of the present invention that the stipulated time (Δ t) is connected the figure of number of units relation with indoor set.
Fig. 7 shows the stair like control strategy of electric expansion valve 4 and the refrigerant of compressor in air-conditioner control method of the present invention and to spue the relation of temperature.
Fig. 8 represents that in air-conditioner control method of the present invention, refrigerant temperature is close to the figure of control method during target temperature.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be described in more detail.
Air-conditioner involved in the present invention and control method thereof is described in detail preferred embodiment referring to accompanying drawing.In addition, in the description of the drawings, be accompanied by same symbol to same or considerable part, the repetitive description thereof will be omitted.
(the first embodiment)
As shown in Figure 3, the air-conditioner of the first embodiment of the present invention, be such as multi-gang air-conditioner device, it is connected with multiple indoor set.Compressor 1, cubic valve 2, indoor heat exchanger 3-1 ~ 3-3, electric expansion valve 4-1 ~ 4-3, outdoor heat exchanger 5 is connected with in turn in refrigerant loop.
The control method of the air-conditioner of present embodiment is described below in conjunction with Fig. 4.The control of the compressor 1, cubic valve 2, electric expansion valve 4-1 ~ 4-3, fan etc. of present embodiment can be controlled by known control unit, each unit can be controlled by same control unit, is passed to total control unit after also can being controlled by respective control unit respectively through bus.After compressor 1 starts, the aperture of electric expansion valve 4-1 ~ 4-3 is set as according to the rotating speed of compressor 1 and indoor set operating number and the initial opening P0 tried to achieve, according to the temperature parameter detected by refrigerant loop, control the aperture of electric expansion valve 4-1 ~ 4-3, it is made stepwise to reduce gradually, till reaching target aperture P1 in each stipulated time Δ t.That is, after from compressor operation, through Δ t time and make the aperture decline Δ P of electric expansion valve.Herein, owing to there being multiple indoor set to operate simultaneously, so stipulated time Δ t is greater than the Δ t ' of the situation of 1 indoor set in prior art.In addition, for each electric expansion valve 4-1 ~ 4-3, the value of its Δ t and Δ P can be set as identical, also can heat (cold) factor such as ability, environment temperature according to respective and be set as not identical.
Fig. 5 is by the figure of (cold) ability that heats compared with the air-conditioner of prior art of the air-conditioner of present embodiment.As can be seen from the figure, use the control method of present embodiment, can just provide higher relative to prior art at the compressor operation initial stage and heat (cold) ability, thus improve air-conditioner heat (cold) efficiency.
In multi-gang air-conditioner device, when being connected with multiple stage indoor set, the situation that the machine that there are the kind of indoor set and the different of power is connected, when as shown in Figure 4 stepped control being carried out to electric expansion valve 4, while indoor set, running beginning number of units is more, stipulated time, Δ t was then controlled as longer, and this is to keeping the stable very effective of refrigerant loop.In addition, (cold) ability that heats of the indoor set simultaneously operated relatively and the piping length of each indoor set within 8m, operating number and stipulated time Δ t are proportional relationship as shown in Figure 6, if Δ t increases about 10 seconds when often increasing the connection number of units of an indoor set, then can ensure the stable of refrigerant loop.Such as, off-premises station is connected with 3 and heats the identical indoor set of (cold) ability, and the piping length of respective indoor set is about 8m, 2 operate simultaneously start when, be preferably stipulated time Δ t be about 70 seconds.
But, when connection number of units along with indoor set increases to 4,5, the time needed for target aperture arriving electric expansion valve 4 is very long, except controlling Δ t and Δ P, also the preferred temperature to refrigerant detects, and the second embodiment detected the temperature of refrigerant is below described.
(the second embodiment)
Structure first embodiment of the air-conditioner of the second embodiment is identical.The refrigerant loop diagram of Fig. 3 to be the connection number of units of indoor set be situation of 3.Be connected with compressor 1, cubic valve 2, indoor heat exchanger 3-1 ~ 3-3, electric expansion valve 4-1 ~ 4-3, outdoor heat exchanger 5 in turn.The air-conditioner of the second embodiment has the whether stable refrigerant circulation detector of the circulation that detects refrigerant further.Refrigerant circulation detector is such as the thermistor (not shown) of the temperature detecting refrigerant loop, and it can be arranged on the vicinity of electric expansion valve 4, the vicinity of compressor 1 or other refrigerant loops.Based on the information from refrigerant circulation detector, control the value of stipulated time Δ t in the mode making aperture reduce in a ladder after the stable circulation of refrigerant.Such as, following control mode can be carried out: while reaching the stipulated time Δ t preset, detect refrigerant and whether be in stable state, if be not in stable state, then extend Δ t till refrigerant reaches stable state, afterwards, then carry out the action of aperture reducing electric expansion valve 4.Thereby, it is possible to ensure in whole aperture adjustment process, the flowing of refrigerant keeps stable.
In multi-gang air-conditioner device, when multiple stage indoor set starts running simultaneously, when carrying out the stair like control strategy of the electric expansion valve shown in Fig. 4 for each electric expansion valve 4, when Δ t is not the fully long time, refrigerant loop becomes unsure state.This phenomenon is the aperture owing to reducing electric expansion valve 4 too quickly, electric expansion valve 4 is made to become the baffle element of refrigerant, refrigerant from the refrigerant exhaust end of compressor 1 to electric expansion valve 4 position becomes unnecessary, then become not enough from the refrigerant of electric expansion valve 4 to the refrigerant suction side of compressor 1, thus cause the flowing instability of the refrigerant in refrigerant loop, and cause (cold) ability that heats step-down when starting., Fig. 7 is used to illustrate herein, by detecting the thermistor installed on refrigerant loop, thus the method not making the aperture of electric expansion valve 4 too small.
The refrigerant of stair like control strategy and compressor that Fig. 7 shows electric expansion valve 4 spues the relation of temperature.When carrying out the control of electric expansion valve as shown in Figure 4, in certain hour Δ t, whether exceed to the temperature amplitude of refrigerant the temperature amplitude range delta Te predetermined to monitor, if temperature amplitude range delta Te exceedes and the temperature amplitude scope predetermined, then the aperture of electric expansion valve 4 is temporarily increased, thus suppress the rising rapidly of Δ Te.After in the scope that Δ Te gets back to regulation, again start the action reducing electric expansion valve.Herein, the refrigerant temperature preferably detected by thermistor, when raising 10 ~ 20 DEG C in 20 seconds, increases the aperture of electric expansion valve.
Fig. 8 is that refrigerant temperature is close to control method during target temperature.Be arranged near electric expansion valve 4 or compressor 1 or the thermistor in other refrigerant loops close to (such as distance objective temperature for ± 3 DEG C within) when target temperature, carry out the aperture adjustment of electric expansion valve 4 lentamente, the temperature amplitude detected when this thermistor, for certain or in prescribed limit, can judge that the circulation of refrigerant is stable.
According to such control method, even if the setting-up time of the Δ t shown in Fig. 4 is too short, also has and can make refrigerant loop autostable effect as early as possible.Heat (cold) ability when can be started fast simultaneously.
As described above, air-conditioner of the present invention and control method thereof, consider the rotating speed of compressor and the connection number of units of indoor set, and control the aperture of electric expansion valve, and judge the function whether flowing of refrigerant is stable, at the start of run turntable of the flowing instability of refrigerant by adding, refrigerant circulation rapidly can be carried out, thus heat (cold) ability during startup when can improve compressor start, particularly when heating running and starting, there is the effect improving heating capacity.
Although below illustrate invention has been in conjunction with the accompanying drawings and embodiments, be appreciated that above-mentioned explanation does not limit the present invention in any form.Those skilled in the art can be out of shape the present invention when not departing from connotation of the present invention and scope as required and change, and these distortion and change all fall within the scope of the present invention.
Claims (14)
1. an air-conditioner, possesses and connects compressor, indoor heat converter, electric expansion valve and outdoor heat converter and the refrigerant loop that forms, it is characterized in that,
After described compressor start, the aperture of described electric expansion valve is set as the initial opening of trying to achieve according to compressor rotary speed and indoor set operating number, according to the temperature parameter detected by described refrigerant loop, control the aperture of described electric expansion valve, it is made stepwise to reduce gradually within each stipulated time, till reaching target aperture.
2. air-conditioner as claimed in claim 1, is characterized in that,
While described indoor set, running beginning number of units is more, and the described stipulated time is controlled as longer.
3. air-conditioner as claimed in claim 2, is characterized in that,
, piping length identical in the performance of described indoor set is within the length of regulation, while described indoor set, running starts number of units and the value direct proportionality of described stipulated time.
4. air-conditioner as claimed in claim 1, is characterized in that,
There is refrigerant circulation detector that whether circulation of detection refrigerant is stable further, based on the information from described refrigerant circulation detector, control the value of described stipulated time in the mode making aperture reduce in a ladder after the stable circulation of refrigerant.
5. air-conditioner as claimed in claim 4, is characterized in that,
Described refrigerant circulation detector is thermistor additional near described compressor, described electric expansion valve or on other refrigerant loops, based on the temperature amplitude detected by described thermistor for necessarily or within the limits prescribed, thus judge that the circulation of refrigerant is stable.
6. air-conditioner as claimed in claim 5, is characterized in that,
The refrigerant temperature detected by thermistor, when raising set point of temperature within a certain period of time, increases the aperture of described electric expansion valve.
7. air-conditioner as claimed in claim 6, is characterized in that,
The refrigerant temperature detected by thermistor, when raising 10 ~ 20 DEG C in 20 seconds, increases the aperture of described electric expansion valve.
8. a control method for air-conditioner, the refrigerant loop that described air-conditioner possesses connection compressor, indoor heat converter, electric expansion valve and outdoor heat converter and forms, is characterized in that,
After described compressor start, the aperture of described electric expansion valve is set as the initial opening of trying to achieve according to compressor rotary speed and indoor set operating number, according to the temperature parameter detected by described refrigerant loop, control the aperture of described electric expansion valve, it is made stepwise to reduce gradually within each stipulated time, till reaching target aperture.
9. the control method of air-conditioner as claimed in claim 8, is characterized in that,
While described indoor set, running beginning number of units is more, and the described stipulated time is controlled as longer.
10. the control method of air-conditioner as claimed in claim 9, is characterized in that,
, piping length identical in the performance of described indoor set is within the length of regulation, while described indoor set, running starts number of units and the value direct proportionality of described stipulated time.
The control method of 11. air-conditioners as claimed in claim 8, is characterized in that,
Described air-conditioner has further and detects the whether stable refrigerant circulation detector of the circulation of refrigerant,
Based on the information from described refrigerant circulation detector, control the value of described stipulated time in the mode making aperture reduce in a ladder after the stable circulation of refrigerant.
The control method of 12. air-conditioners as claimed in claim 11, is characterized in that,
Described refrigerant circulation detector is thermistor additional near described compressor, described electric expansion valve or on other refrigerant loops,
Based on the temperature amplitude detected by described thermistor for necessarily or within the limits prescribed, thus judge that the circulation of refrigerant is stable.
The control method of 13. air-conditioners as claimed in claim 12, is characterized in that,
The refrigerant temperature detected by thermistor, when raising set point of temperature within a certain period of time, increases the aperture of described electric expansion valve.
The control method of 14. air-conditioners as claimed in claim 13, is characterized in that,
The refrigerant temperature detected by thermistor, when raising 10 ~ 20 DEG C in 20 seconds, increases the aperture of described electric expansion valve.
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Cited By (5)
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| CN106152391A (en) * | 2015-04-28 | 2016-11-23 | 青岛海尔空调电子有限公司 | A kind of method too high for the compressor exhaust temperature controlling Super long tube air-conditioning |
| CN110068179A (en) * | 2019-04-22 | 2019-07-30 | 广东美博制冷设备有限公司 | A kind of control method and device of electric expansion valve |
| CN110966710A (en) * | 2018-09-29 | 2020-04-07 | 青岛海尔空调器有限总公司 | Method and device for determining initial opening degree of electronic expansion valve of air conditioner |
| CN113280464A (en) * | 2021-06-09 | 2021-08-20 | 珠海格力电器股份有限公司 | Air conditioner control method, air conditioner controller and air conditioning unit |
| CN115164349A (en) * | 2022-06-30 | 2022-10-11 | 海信空调有限公司 | Air conditioner |
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| CN113280464A (en) * | 2021-06-09 | 2021-08-20 | 珠海格力电器股份有限公司 | Air conditioner control method, air conditioner controller and air conditioning unit |
| CN115164349A (en) * | 2022-06-30 | 2022-10-11 | 海信空调有限公司 | Air conditioner |
| CN115164349B (en) * | 2022-06-30 | 2024-01-26 | 海信空调有限公司 | Air conditioner |
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Application publication date: 20141217 |