CN114279071A - Control method of air conditioner and air conditioner - Google Patents
Control method of air conditioner and air conditioner Download PDFInfo
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- CN114279071A CN114279071A CN202111602251.3A CN202111602251A CN114279071A CN 114279071 A CN114279071 A CN 114279071A CN 202111602251 A CN202111602251 A CN 202111602251A CN 114279071 A CN114279071 A CN 114279071A
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- air conditioner
- air inlet
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- adjusting device
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000005494 condensation Effects 0.000 claims abstract description 22
- 238000009833 condensation Methods 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims description 11
- 238000010257 thawing Methods 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 9
- 238000007710 freezing Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000004378 air conditioning Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 238000005057 refrigeration Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
The invention discloses a control method of an air conditioner and the air conditioner, wherein an air inlet area adjusting device with adjustable opening degree is arranged at an air inlet of an air conditioner external unit, and the method comprises the following steps: presetting a plurality of outdoor environment temperature ranges, wherein each outdoor environment temperature is preset with the starting opening of one air inlet area adjusting device; before the compressor is started, the outdoor environment temperature range where the current outdoor environment temperature is located is determined, and the opening degree of the air inlet area adjusting device is adjusted to be the starting opening degree corresponding to the outdoor environment temperature range. The invention adjusts the opening of the air inlet area adjusting device according to the system parameters of the air conditioner, improves the condensation temperature of the air conditioner during low-temperature refrigeration, ensures the condensation temperature to be within the range of the nominal value of the compressor, and solves the problems of low condensation temperature, low pressure ratio, serious liquid carrying and poor system reliability of the low-temperature refrigeration of the air conditioner. The air conditioning unit can be ensured to be stable in system pressure in the starting process, and the problem of starting low-pressure protection is avoided.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method thereof.
Background
As global warming has gradually increased, the role of air conditioners in human life has become increasingly important. Along with the gradual popularization of air conditioners, the application scenes of the air conditioners are more and more, along with the gradual expansion of the use environment of the air conditioners, the temperature adaptability requirement of the air conditioners is gradually improved, higher requirements are also provided for the refrigeration and heating of the air conditioners in low-temperature environments, the air conditioners are firstly limited by water vapor in the air, and a heat exchanger is very easy to freeze at low temperature, so that the problems of poor reliability, frequent protection and high failure rate of an air conditioning system are caused.
Disclosure of Invention
The invention provides an air conditioner control method and an air conditioner, aiming at solving the technical problem that low-pressure protection is started when the temperature of a condensation side is too low during low-temperature refrigeration of the air conditioner in the prior art.
The technical scheme adopted by the invention is as follows:
the invention provides a control method of an air conditioner, wherein an air inlet area adjusting device with adjustable opening degree is arranged at an air inlet of an air conditioner external unit, and the control method comprises the following steps:
presetting a plurality of outdoor environment temperature ranges, wherein each outdoor environment temperature is preset with the starting opening of one air inlet area adjusting device;
before the compressor is started, the outdoor environment temperature range where the current outdoor environment temperature is located is determined, and the opening degree of the air inlet area adjusting device is adjusted to be the starting opening degree corresponding to the outdoor environment temperature range.
The invention also comprises the following steps:
presetting a plurality of difference value ranges, wherein each difference value range is preset with a corresponding change opening degree;
and during refrigerating operation, determining the difference range in which the difference value of the current measured condensation temperature value minus the rated condensation temperature value is positioned, and adjusting the current opening of the air inlet area adjusting device into the sum of the starting opening and the change opening corresponding to the difference range.
Further, when the air conditioner runs in a refrigerating mode, whether the current evaporation temperature is lower than the preset anti-freezing entering temperature or not is judged, and if yes, the current opening degree of the air inlet area adjusting device is reduced by the preset opening degree.
The invention also comprises the following steps: and when defrosting is carried out, the air inlet area adjusting device is controlled to seal the air inlet of the air conditioner external unit.
Further, when the refrigeration operation is carried out and the outdoor environment temperature is lower than the preset temperature, the step of determining the difference range of the difference value of the current measured condensation temperature value minus the rated condensation temperature value is executed.
The invention also provides an air conditioner, and the opening of the air inlet area adjusting device is adjusted by using the air conditioner control method.
One embodiment is that, air inlet area adjusting device includes: the air conditioner comprises a plurality of blades covering an air inlet of an air conditioner outer unit, a linkage rod connected with the blades, and a driving piece for driving the linkage rod to move back and forth along the axial direction of the linkage rod to change the angle of the blades and adjust the air inlet area of the air inlet, wherein the opening degree is the rotating angle of the blades.
The second embodiment is, air inlet area adjusting device includes: the setting is at many slide rails of air intake side, and the gliding baffle of slide rail can be followed to the polylith, and drive baffle slides along the slide rail and adjusts the driving piece of air intake area. And a pulley is arranged between the sliding rail and the clapboard.
Preferably, the air conditioner comprises a heat pump air conditioner.
Compared with the prior art, the invention adjusts the opening degree of the air inlet area adjusting device according to the system parameters of the air conditioner, and has the following advantages:
1. the condensing temperature of the air conditioner during low-temperature refrigeration is improved, the condensing temperature is ensured to be within the range of the nominal value of the compressor, and the problems of low condensing temperature, low pressure ratio, serious liquid carrying and poor system reliability of the air conditioner during low-temperature refrigeration are solved.
2. The condensing temperature is maintained in a reasonable range during defrosting, and the defrosting efficiency and the running stability of the air conditioning system are improved.
3. The air conditioning unit can be ensured to be stable in system pressure in the starting process, and the problem of starting low-pressure protection is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a 45 degree angle structure according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a 90 degree angle structure according to a first embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a 0 degree angle in the first embodiment of the present invention;
FIG. 5 is a schematic structural view of another embodiment of the present invention;
FIG. 6 is a top view of another embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The principles and construction of the present invention will be described in detail below with reference to the drawings and examples.
The invention provides a control method of an air conditioner, wherein an air inlet area adjusting device is arranged at an air inlet of an air conditioner external unit, and the air inlet area adjusting device can change the air inlet area of the air inlet by adjusting the opening degree. The specific adjusting method of the air inlet device comprises the following steps: presetting a plurality of outdoor environment temperature ranges, wherein the starting opening degree of an air inlet area adjusting device is preset in each outdoor environment temperature range; before a compressor of the air conditioner is started, the outdoor environment temperature range where the current outdoor environment temperature is located is determined, and the opening degree of the air inlet area adjusting device is adjusted to be the starting opening degree corresponding to the outdoor environment temperature range. The air conditioning unit can be ensured to be stable in system pressure in the starting process, and the problem of starting low-pressure protection is avoided.
Specifically, T is shown in the following tableRing 1~TRing 2Is a range of outdoor ambient temperatures, alphaOpener 1To correspond to TRing 1~TRing 2The specific correspondence between the two can be obtained through experiments.
| Outdoor ambient temperature | Rotation angle of shutter |
| TRing 1~TRing 2 | αOpener 1 |
| TRing 2~TRing 3 | αOpener 2 |
| …… | …… |
In the normal operating process of air conditioner, can be according to the actual measurement condensing temperature of system, adjust air inlet area adjusting device's aperture, specifically be through the difference of comparison actual measurement condensing temperature value and rated condensation temperature value, confirm air inlet area adjusting device's variation value, specifically as follows.
Presetting a difference range of subtracting a rated condensation temperature value from a plurality of measured condensation temperature values, wherein each difference range is preset with a corresponding change opening; and during refrigerating operation, determining a difference range of the difference value of the current actually-measured condensation temperature value minus the rated condensation temperature value, and adjusting the current opening of the air inlet area adjusting device into the sum of the starting opening and the change opening corresponding to the difference range. The opening degree of the air inlet area adjusting device can be automatically changed according to the change of the condensation temperature value. The condensing temperature of the unit is ensured to be near the rated condensing temperature, and the running reliability of the unit is ensured.
And in the normal operation process of the air conditioning system, comprehensively judging the opening degree of the air inlet area adjusting device according to the actually measured evaporation temperature value of the system. Specifically, the actual measurement evaporation temperature is compared with the preset anti-freezing entering temperature T, and when the actual measurement evaporation temperature is lower than the preset anti-freezing entering temperature T for freezing continuously for T seconds (preset time), the opening degree of the air inlet area adjusting device is reduced by the preset opening degree, so that the air inlet area of the condensation side of the system is reduced, the air quantity of the condensation side is reduced, and the condensation temperature and the evaporation temperature of the system are improved. The method can ensure that the evaporation temperature of the unit is above the entering temperature of the anti-freezing protection in the stable operation process of the unit, avoid the unit from frequently entering the anti-freezing protection and ensure the comfort of the unit during low-temperature refrigeration.
When the air conditioner runs in low-temperature heating, an outdoor unit of the air conditioner is used as an evaporator, and because the ambient temperature is low (generally below-15 ℃), the evaporation temperature is pulled to be very low, the temperature of the surface of the outdoor heat exchanger is far lower than 0 ℃, and water vapor in the air can freeze on the surface of the heat exchanger, so that the heat exchange effect of the heat exchanger is influenced. Therefore, the air conditioning unit can regularly carry out defrosting treatment during low-temperature heating operation, the evaporation fan and the condensation fan stop with load movement, the four-way valve is reversed, the outdoor heat exchanger is used as a condenser, and the high-temperature and high-pressure refrigerant output by the compressor is used for carrying out defrosting treatment on the outdoor heat exchanger.
When the air conditioning unit detects that defrosting is needed, the load acts according to a normal time sequence, then the air inlet area adjusting device is controlled to completely close the air inlet, the outdoor low-temperature environment is prevented from continuing to cool the outdoor heat exchanger, the outdoor heat exchanger can be guaranteed to better exchange heat with the high-temperature and high-pressure refrigerant discharged by the compressor, heat exchange of the outdoor heat exchanger is enabled to be more sufficient, the outdoor low-temperature environment is prevented from continuing to cool the outdoor heat exchanger, the defrosting speed can be increased, and the low-temperature heating comfort is improved. Meanwhile, in the defrosting process of the air conditioning unit, in order to ensure that cold air is blown to the indoor side, the indoor heat exchanger cannot completely evaporate the liquid refrigerant, and after the defrosting process is carried out according to the method, the refrigerant of the air conditioning system can be ensured to be excessively cooled, so that the unreasonable effect of liquid impact caused by the fact that a compressor sucks a large amount of liquid refrigerant is avoided, and the reliability of the air conditioning system can be improved.
The invention further provides an air conditioner, particularly a heat pump air conditioner, and the opening degree of the air inlet area adjusting device is adjusted by using the air conditioner control method.
The air intake area adjusting device has various specific embodiments, and two practical air intake area adjusting devices are specifically exemplified in the invention.
As shown in fig. 1 to 4, a first air intake area adjusting device of a louver structure includes: the air conditioner comprises a plurality of blades 21, a plurality of linkage rods 22 and a driving piece, wherein the blades 21 are transversely arranged in parallel and cover an air inlet of an air conditioner outer unit, two ends of each blade 21 are respectively connected with the linkage rods, when the movable linkage rods 22 move up and down back and forth, the angles of all the blades can be changed, the angles of the blades can be turned over at 0-90 degrees, the adjustment of the air inlet area is realized by 0-100%, the driving piece is a motor or an air cylinder and can drive the linkage rods to move back and forth along the axial direction of the driving piece to change the air inlet area of the blade angle adjustment air inlet, and the opening degree is the rotating angle of the blades.
As shown in fig. 5 and 6, the second type is a track partition structure, which specifically includes: many tracks 32, polylith baffle 31, pulley 33 and driving piece, many track parallel arrangement are at the side of air intake, install the pulley between baffle and the track, make the baffle can make a round trip to slide along the track, shelter from the area of air intake through the adjustment baffle, make and realize that air inlet area 0~100% is adjusted, and the driving piece can drive the baffle and make a round trip to slide, and the drive mode of driving piece is the common drive mode among the prior art, does not have concrete repeated description.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A control method of an air conditioner is characterized in that an air inlet area adjusting device with an adjustable opening degree is arranged at an air inlet of an air conditioner external unit, and the control method comprises the following steps:
presetting a plurality of outdoor environment temperature ranges, wherein each outdoor environment temperature is preset with the starting opening of one air inlet area adjusting device;
before the compressor is started, the outdoor environment temperature range where the current outdoor environment temperature is located is determined, and the opening degree of the air inlet area adjusting device is adjusted to be the starting opening degree corresponding to the outdoor environment temperature range.
2. The control method of an air conditioner according to claim 1, further comprising the steps of:
presetting a plurality of difference value ranges, wherein each difference value range is preset with a corresponding change opening degree;
and during refrigerating operation, determining the difference range in which the difference value of the current measured condensation temperature value minus the rated condensation temperature value is positioned, and adjusting the current opening of the air inlet area adjusting device into the sum of the starting opening and the change opening corresponding to the difference range.
3. The control method of an air conditioner according to claim 1,
and when the air conditioner runs in a refrigerating mode, judging whether the current evaporation temperature is lower than the preset anti-freezing entering temperature for a continuous preset time, and if so, reducing the current opening of the air inlet area adjusting device by the preset opening.
4. The control method of an air conditioner according to claim 1, further comprising the steps of: and when defrosting is carried out, the air inlet area adjusting device is controlled to seal the air inlet of the air conditioner external unit.
5. The control method of an air conditioner according to claim 2, wherein the step of determining the difference range in which the difference between the current measured condensation temperature value minus the rated condensation temperature value is located is performed when the cooling operation is performed and the outdoor ambient temperature is lower than a preset temperature.
6. An air conditioner characterized in that the opening degree of the air intake area adjusting device is adjusted using the air conditioner control method of any one of claims 1 to 5.
7. The air conditioner according to claim 6, wherein the air intake area adjusting means comprises: the air conditioner comprises a plurality of blades covering an air inlet of an air conditioner outer unit, a linkage rod connected with the blades, and a driving piece for driving the linkage rod to move back and forth along the axial direction of the linkage rod to change the angle of the blades and adjust the air inlet area of the air inlet, wherein the opening degree is the rotating angle of the blades.
8. The air conditioner according to claim 6, wherein the air intake area adjusting means comprises: the setting is at many slide rails of air intake side, and the gliding baffle of slide rail can be followed to the polylith, and drive baffle slides along the slide rail and adjusts the driving piece of air intake area.
9. The air conditioner according to claim 8, wherein a pulley is provided between the slide rail and the partition plate.
10. The air conditioner of claim 6, wherein the air conditioner comprises a heat pump air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111602251.3A CN114279071A (en) | 2021-12-24 | 2021-12-24 | Control method of air conditioner and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111602251.3A CN114279071A (en) | 2021-12-24 | 2021-12-24 | Control method of air conditioner and air conditioner |
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| CN114279071A true CN114279071A (en) | 2022-04-05 |
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| CN202111602251.3A Pending CN114279071A (en) | 2021-12-24 | 2021-12-24 | Control method of air conditioner and air conditioner |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140345309A1 (en) * | 2011-09-13 | 2014-11-27 | Mitsubishi Electric Corporation | Refrigerating and air-conditioning apparatus |
| CN104949308A (en) * | 2014-03-27 | 2015-09-30 | 广东美的集团芜湖制冷设备有限公司 | Air inlet adjustment and control assembly and system of air-conditioner and air inlet adjustment and control method |
| CN109163417A (en) * | 2018-08-16 | 2019-01-08 | 北京同方洁净技术有限公司 | Air source heat pump system |
| CN109708266A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | Air-valve control method and air-conditioning system |
| CN112611084A (en) * | 2020-11-23 | 2021-04-06 | 珠海格力电器股份有限公司 | Low-temperature refrigeration control method and system, air conditioner, medium and terminal |
-
2021
- 2021-12-24 CN CN202111602251.3A patent/CN114279071A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140345309A1 (en) * | 2011-09-13 | 2014-11-27 | Mitsubishi Electric Corporation | Refrigerating and air-conditioning apparatus |
| CN104949308A (en) * | 2014-03-27 | 2015-09-30 | 广东美的集团芜湖制冷设备有限公司 | Air inlet adjustment and control assembly and system of air-conditioner and air inlet adjustment and control method |
| CN109163417A (en) * | 2018-08-16 | 2019-01-08 | 北京同方洁净技术有限公司 | Air source heat pump system |
| CN109708266A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | Air-valve control method and air-conditioning system |
| CN112611084A (en) * | 2020-11-23 | 2021-04-06 | 珠海格力电器股份有限公司 | Low-temperature refrigeration control method and system, air conditioner, medium and terminal |
Non-Patent Citations (1)
| Title |
|---|
| 张新德: "《快学快修中央空调实用技能问答》", 31 August 2006 * |
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Application publication date: 20220405 |