CN109237728B - Condensation prevention control method for variable frequency air conditioner - Google Patents
Condensation prevention control method for variable frequency air conditioner Download PDFInfo
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- CN109237728B CN109237728B CN201810995638.1A CN201810995638A CN109237728B CN 109237728 B CN109237728 B CN 109237728B CN 201810995638 A CN201810995638 A CN 201810995638A CN 109237728 B CN109237728 B CN 109237728B
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- air conditioner
- compressor
- wind speed
- relative humidity
- speed gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention relates to a control technology of a variable frequency air conditioner, and discloses an anti-condensation control method of the variable frequency air conditioner. The method comprises the following steps: in a refrigeration mode of the variable frequency air conditioner, the maximum operation frequency and the wind speed gear of the compressor are matched according to the change of indoor relative humidity, and when the humidity is higher, the maximum operation frequency of the compressor is reduced and the indoor wind speed gear is improved; by establishing a functional relationship between the relative humidity and the maximum operating frequency variation at low or gradually decreasing relative humidity, different maximum operating frequencies of the compressor are adapted at different relative humidities: the lower the humidity, the higher the maximum operating frequency of the compressor. The invention is suitable for the condensation prevention control of the variable frequency air conditioner.
Description
Technical Field
The invention relates to a control technology of a variable frequency air conditioner, in particular to an anti-condensation control method of the variable frequency air conditioner.
Background
During the air conditioner refrigeration, can be because evaporating temperature is less than air dew point temperature and form the condensation water, especially when air relative humidity is great, if evaporating temperature crosses lowly can lead to air conditioner external structure surface to form a large amount of condensation water, the time will slide down or drip for a long time, directly blows off from the air conditioner air outlet even, uses for the air conditioner and brings the potential safety hazard, influences consumer's subjective impression simultaneously.
In the prior art, the frequency of an air conditioner compressor is generally reduced and the air speed is improved when the relative humidity is higher, and the problem is solved by increasing the evaporation temperature to reduce condensation or even not condensation. However, the treatment method has certain problems: limiting the frequency of the compressor can affect the refrigerating capacity of the air conditioner and can not reach the room temperature required by consumers; improve the wind speed and can increase the noise on the one hand, on the other hand wind speed increases and can let evaporating temperature continue to rise, and the air-out temperature behind the heat exchanger of air also can correspondingly rise simultaneously, and this body sense that can give the consumer brings uncomfortable impression.
In conclusion, the anti-condensation control means in the prior art can effectively reduce condensation, but affects the comfort experience of the user.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for controlling the variable frequency air conditioner to prevent condensation is provided, and can be used for preventing a large amount of condensation water from being formed when the relative humidity is high in the refrigeration mode, better playing the performance of the variable frequency air conditioner and improving the comfort level experience of a user.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the variable frequency air conditioner condensation prevention control method comprises the following steps:
in a refrigeration mode of the variable frequency air conditioner, the maximum operation frequency and the wind speed gear of the compressor are matched according to the change of indoor relative humidity, and when the humidity is higher, the maximum operation frequency of the compressor is reduced and the indoor wind speed gear is improved; by establishing a functional relationship between the relative humidity and the maximum operating frequency variation at low or gradually decreasing relative humidity, different maximum operating frequencies of the compressor are adapted at different relative humidities: the lower the humidity, the higher the maximum operating frequency of the compressor.
As a further optimization, the method specifically comprises the following steps:
a. in a refrigeration mode of the variable frequency air conditioner, judging whether the current indoor relative humidity value is larger than or equal to a set threshold value n, if so, entering the step b, otherwise, entering the step c;
b. limiting the maximum operation frequency of a compressor of the variable frequency air conditioner to mHz, increasing the indoor wind speed gear, and returning to the step a;
c. and (b) performing relevant control on the maximum operation frequency of the compressor of the variable frequency air conditioner according to the current indoor relative humidity value, and increasing or gradually increasing the maximum operation frequency of the compressor when the humidity is lower or gradually decreases, and returning to the step (a).
As a further optimization, in step b, the specific method for increasing the indoor wind speed gear comprises the following steps: and increasing at least one gear on the basis of the current indoor wind speed gear, and if the current indoor wind speed gear is the maximum gear, operating at the maximum gear.
As a further optimization, step c further comprises: if the indoor wind speed gear is increased because the indoor relative humidity value is larger than or equal to the set threshold value n, when the current indoor relative humidity value is detected to be reduced below the set threshold value n, the indoor wind speed gear is restored to the original wind speed gear before the wind speed gear is increased.
As a further optimization, in step c, the maximum operating frequency of the compressor of the inverter air conditioner is subjected to associated control according to the current indoor relative humidity value, specifically:
the maximum operating frequency of the compressor is m + (n-the current indoor relative humidity value) 100.
The invention has the beneficial effects that:
when the variable frequency air conditioner refrigerates, under different relative humidity, the frequency and the wind speed which are matched with each other are not only capable of effectively avoiding the air conditioner to generate a large amount of condensed water, preventing the condensed water from blowing out or dripping to cause discomfort or reliability problems, but also capable of carrying out correlation control on the frequency, the wind speed and the relative humidity of the variable frequency air conditioner, better playing the performance of the air conditioner and improving the comfortableness of the variable frequency air conditioner refrigeration.
Drawings
Fig. 1 is a flowchart of an anti-condensation control method for an inverter air conditioner according to an embodiment of the invention.
Detailed Description
The invention aims to provide an anti-condensation control method for a variable frequency air conditioner, which can better play the performance of the variable frequency air conditioner and improve the comfort experience of a user while preventing a large amount of condensation water from being formed when the relative humidity is high in a refrigeration mode.
In the invention, under the refrigeration mode of the variable frequency air conditioner, the maximum operation frequency and the operation wind speed of the compressor are matched according to the change of the indoor relative humidity: when the humidity is high, the maximum operation frequency of the compressor is reduced, and meanwhile, the indoor wind speed gear is increased, so that the evaporation temperature is increased, and the formation of condensed water is reduced; by establishing a functional relationship between the relative humidity and the maximum operating frequency variation at low or gradually decreasing relative humidity, different maximum operating frequencies of the compressor can be adapted at different relative humidities: the lower the humidity, the higher the maximum operating frequency of the compressor to prevent the air conditioner from forming a large amount of condensed water while satisfying the cooling demand of consumers.
In particular implementation, the method specifically comprises the following steps:
a. in a refrigeration mode of the variable frequency air conditioner, judging whether the current indoor relative humidity value is larger than or equal to a set threshold value n, if so, entering the step b, otherwise, entering the step c;
in the step, the variable frequency air conditioner detects the current indoor relative humidity value in real time through the humidity sensor, and compares and judges the obtained detection data with a preset threshold value n.
b. Limiting the maximum operation frequency of a compressor of the variable frequency air conditioner to mHz, increasing the indoor wind speed gear, and returning to the step a;
in this step, the specific method for increasing the gear of the indoor wind speed is as follows: and increasing at least one gear on the basis of the current indoor wind speed gear, and if the current indoor wind speed gear is the maximum gear, operating at the maximum gear.
By limiting the maximum operating frequency of the compressor and increasing the indoor air speed, the evaporating temperature can be increased, and the formation of condensation can be reduced.
c. Performing relevant control on the maximum operation frequency of a compressor of the variable frequency air conditioner according to the current indoor relative humidity value, increasing or gradually increasing the maximum operation frequency of the compressor when the humidity is lower or gradually decreases, and returning to the step a;
if the indoor wind speed gear is increased because the indoor relative humidity value is larger than or equal to the set threshold value n, when the current indoor relative humidity value is detected to be reduced below the set threshold value n, the indoor wind speed gear is restored to the original wind speed gear before the wind speed gear is increased.
In this step, the maximum operating frequency of the compressor of the inverter air conditioner is controlled in a correlated manner according to the current indoor relative humidity value, and the specific implementation manner is as follows: the maximum operating frequency of the compressor is m + (n-the current indoor relative humidity value) 100.
Under the condition that humidity is lower or reduces gradually, the condensation water is difficult for forming or less that forms, can better exert the refrigeration performance of air conditioner through the maximum operating frequency who improves air condition compressor to satisfy user's refrigeration demand, improve the comfort level, and when indoor relative humidity value drops below the threshold value, resume indoor wind speed gear and can reduce the noise influence.
The scheme of the invention is further described by combining the drawings and the embodiment:
example (b):
in this embodiment, the preset humidity threshold n is 75%, and the limited maximum operating frequency m is 30 Hz.
As shown in fig. 1, the condensation prevention control method of the inverter air conditioner in the embodiment specifically includes the following implementation steps:
1. the variable frequency air conditioner detects the current indoor relative humidity condition according to the humidity sensor;
2. judging whether the current indoor relative humidity is greater than or equal to 75% of a preset humidity threshold value, if so, executing the step 3, otherwise, executing the step 4;
3. limiting the maximum operation frequency of a compressor of the variable frequency air conditioner to be 30Hz, increasing the indoor wind speed gear by one gear (for example, increasing low wind to medium wind or increasing medium wind to high wind), if the current indoor wind speed gear is the maximum gear, operating by the maximum gear, returning to the step 1 to continuously detect the relative humidity value, and entering the step flow circulation;
4. the maximum operation frequency of a compressor of the inverter air conditioner is subjected to associated control according to the current indoor relative humidity value: the maximum operating frequency of the compressor is 30Hz + (75% -current indoor relative humidity value) 100; thereby the refrigeration performance of the air conditioner can be fully exerted on the premise of no risk of condensation; in addition, if the indoor wind speed gear is increased because the indoor relative humidity value is greater than or equal to 75%, when the current indoor relative humidity value is detected to be reduced to be less than 75%, the indoor wind speed gear is restored to the original wind speed gear before the wind speed gear is increased so as to reduce the noise influence; and returning to the step 1 to continuously detect the relative humidity value, and entering the step flow circulation.
Claims (3)
1. The variable frequency air conditioner anti-condensation control method is characterized by comprising the following steps:
in a refrigeration mode of the variable frequency air conditioner, the maximum operation frequency and the wind speed gear of the compressor are matched according to the change of indoor relative humidity, and when the humidity is higher, the maximum operation frequency of the compressor is reduced and the indoor wind speed gear is improved; by establishing a functional relationship between the relative humidity and the maximum operating frequency variation at low or gradually decreasing relative humidity, different maximum operating frequencies of the compressor are adapted at different relative humidities: the lower the humidity, the higher the maximum operating frequency of the compressor;
the method specifically comprises the following steps:
a. in a refrigeration mode of the variable frequency air conditioner, judging whether the current indoor relative humidity value is larger than or equal to a set threshold value n, if so, entering the step b, otherwise, entering the step c;
b. limiting the maximum operation frequency of a compressor of the variable frequency air conditioner to mHz, increasing the indoor wind speed gear, and returning to the step a;
c. performing relevant control on the maximum operation frequency of a compressor of the variable frequency air conditioner according to the current indoor relative humidity value, increasing or gradually increasing the maximum operation frequency of the compressor when the humidity is lower or gradually decreases, and returning to the step a;
step c also includes: if the indoor wind speed gear is increased because the indoor relative humidity value is larger than or equal to the set threshold value n, when the current indoor relative humidity value is detected to be reduced below the set threshold value n, the indoor wind speed gear is restored to the original wind speed gear before the wind speed gear is increased.
2. The anti-condensation control method of the inverter air conditioner according to claim 1,
in the step b, the specific method for improving the indoor wind speed gear comprises the following steps: and increasing at least one gear on the basis of the current indoor wind speed gear, and if the current indoor wind speed gear is the maximum gear, operating at the maximum gear.
3. The anti-condensation control method of the inverter air conditioner according to claim 1 or 2,
in the step c, the maximum operation frequency of the compressor of the inverter air conditioner is subjected to correlation control according to the current indoor relative humidity value, specifically:
the maximum operating frequency of the compressor is m + (n-the current indoor relative humidity value) 100.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810995638.1A CN109237728B (en) | 2018-08-29 | 2018-08-29 | Condensation prevention control method for variable frequency air conditioner |
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| CN201810995638.1A CN109237728B (en) | 2018-08-29 | 2018-08-29 | Condensation prevention control method for variable frequency air conditioner |
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| CN109237728A CN109237728A (en) | 2019-01-18 |
| CN109237728B true CN109237728B (en) | 2021-01-26 |
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| CN110410991B (en) * | 2019-07-08 | 2021-08-27 | 重庆海尔空调器有限公司 | Air conditioner and control method thereof |
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| CN111706965B (en) * | 2020-05-28 | 2022-04-19 | 青岛海尔空调器有限总公司 | Floor condensation preventing method and device for air conditioner and air conditioner |
| CN111928445A (en) * | 2020-07-14 | 2020-11-13 | 海信（山东）空调有限公司 | Variable frequency air conditioner and anti-condensation control method thereof |
| CN112128949B (en) * | 2020-09-27 | 2022-03-18 | 格力电器（合肥）有限公司 | Air conditioner condensation prevention control method and device, electronic equipment and storage medium |
| CN112682901B (en) * | 2020-12-25 | 2022-05-27 | 四川长虹空调有限公司 | Control method of variable frequency air conditioner with humidity sensor |
| CN112944642B (en) * | 2021-01-29 | 2022-08-19 | 青岛海尔空调器有限总公司 | Method and device for condensation prevention control and air conditioner |
| CN112880122A (en) * | 2021-01-29 | 2021-06-01 | 广东积微科技有限公司 | Control method for lower limit of refrigeration humidity of air pipe type air conditioner |
| CN113932410B (en) * | 2021-09-26 | 2022-12-23 | 青岛海尔空调器有限总公司 | Air conditioner control method, control device, air conditioner and storage medium |
| CN113847694A (en) * | 2021-10-22 | 2021-12-28 | 海信（广东）空调有限公司 | Air conditioner, control method thereof, and computer-readable storage medium |
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| US4448035A (en) * | 1981-04-20 | 1984-05-15 | Toyota Jidosha Kogyo Kabushiki Kaisha | Air conditioner control system |
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