CN111076316A - Humidity control method - Google Patents
Humidity control method Download PDFInfo
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- CN111076316A CN111076316A CN201911251441.8A CN201911251441A CN111076316A CN 111076316 A CN111076316 A CN 111076316A CN 201911251441 A CN201911251441 A CN 201911251441A CN 111076316 A CN111076316 A CN 111076316A
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- air conditioner
- dew point
- industrial air
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- controller
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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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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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
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
-
- 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
- F24F2110/10—Temperature
-
- 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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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a humidity control method, which mainly comprises the following steps: setting a return air temperature value T0, a relative humidity value RH0, a relative humidity control lower limit value RH1, a relative humidity control upper limit value RH2 and a return air temperature lower limit value T1 in a controller in advance; the controller calculates a set value D0 of the return air dew point, a control lower limit value D1 of the dew point and a control upper limit value D2 of the dew point according to the set T0, RH0, RH1 and RH 2; the controller calculates an actual return air dew point D according to the detected actual return air temperature value T and the actual relative humidity value RH; when D is less than D1, the industrial air conditioner humidifies; when D1 is not less than D2, the controller compares the RH, RH1 and RH2, and adjusts the working state of the industrial air conditioner according to the comparison result; when D2 is less than D, the industrial air conditioner performs refrigeration and dehumidification; the humidity control method provided by the invention takes dew point control as a main part and relative humidity control as an auxiliary part, and achieves the effects of saving energy and water on the premise of meeting the humidity control requirement of industrial production.
Description
Technical Field
The invention relates to the technical field of refrigeration air conditioners, in particular to a humidity control method.
Background
In the industrial production process, the humidity of the industrial air conditioner generally needs to be controlled within a certain range to ensure the normal operation of the industrial production, and the current humidity control methods of the industrial air conditioner are mainly divided into two methods, one is based on relative humidity and the other is based on dew point (i.e. absolute humidity).
For the control method based on relative humidity control, under the condition that the dry bulb temperature is low and the relative humidity is high, the industrial air conditioner is easy to carry out excessive dehumidification, namely under the condition that the dew point meets the production requirement, the refrigeration and dehumidification are still carried out until the dew point is very low, meanwhile, the dry bulb temperature is required to be improved by large thermal compensation, if the thermal compensation is insufficient, the dead cycle of firstly dehumidifying, then humidifying and then dehumidifying is easy to enter, electricity and water are wasted, and the temperature and the humidity of the environment are difficult to meet the requirement of industrial production; and under the condition that the temperature of the dry bulb is high and the relative humidity is low, the industrial air conditioner is easy to enter an unnecessary humidifying mode, so that the waste of resources is caused.
For a control method based on dew point control, the control range of the dew point needs to be determined through conversion, the current dew point control range is basically fixed, but dynamic adjustment of the dew point control range can also be realized according to set return air temperature and humidity, but the concept of relative humidity is more popular, and more humidity control requirements are also specific to the relative humidity, so the control method adopting the dew point control is not intuitive; in addition, when the dry bulb temperature is low and the relative humidity is high, the industrial air conditioner can not adjust the working state of the industrial air conditioner because the dew point is in the control range, so that the temperature and the humidity of the environment can not meet the requirements of industrial production.
It is seen that improvements and enhancements to the prior art are needed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a humidity control method which takes dew point control as a main part and relative humidity control as an auxiliary part and achieves the effects of saving energy and water on the premise of meeting the humidity control requirement of industrial production.
In order to achieve the purpose, the invention adopts the following technical scheme:
a humidity control method comprising the steps of:
s100, setting a return air temperature value T0, a relative humidity value RH0, a relative humidity control lower limit value RH1, a relative humidity control upper limit value RH2 and a return air temperature lower limit value T1 in the controller in advance;
s200, calculating a set value D0 of the return air dew point, a control lower limit value D1 of the dew point and a control upper limit value D2 of the dew point by the controller according to the set T0, RH0, RH1 and RH 2;
s300, calculating an actual return air dew point D by the controller according to the detected actual return air temperature value T and the actual relative humidity value RH;
s400, when D is less than D1, executing step S500, when D1 is less than or equal to D2, executing step S600, when D2 is less than D, executing step S700;
s500, the industrial air conditioner enters a humidifying mode, and the controller controls the industrial air conditioner to humidify;
s600, comparing the sizes of RH, RH1 and RH2 by the controller, and adjusting the working state of the industrial air conditioner according to the comparison result;
and S700, the industrial air conditioner enters a dew point dehumidification mode, and the controller controls the industrial air conditioner to refrigerate and dehumidify.
In the humidity control method, the step S700 further includes the steps of:
s710, the controller compares the actual return air temperature value T with the return air temperature lower limit value T1, and if T is less than T1, the step S720 is executed;
and S720, controlling the industrial air conditioner to start electric heating by the controller to perform temperature compensation.
In the humidity control method, the step S600 specifically includes the following steps:
s601, if RH is less than RH1, executing step S602, if RH1 is less than or equal to RH2, executing step S603, and if RH2 is less than RH, executing step S604;
s602, controlling an industrial air conditioner to refrigerate and cool by a controller;
s603, neither dehumidification nor humidification is carried out on the industrial air conditioner;
and S604, controlling the industrial air conditioner to start electric heating by the controller to heat and raise the temperature.
In the humidity control method, in the step S400, the industrial air conditioner humidifies the object of the lower limit D1 for dew point control.
In the humidity control method, in the step S700, the industrial air conditioner performs cooling and dehumidification with a control upper limit value D2 of a dew point as a target.
In the humidity control method, in step S602, the industrial air conditioner performs cooling with RH1 as a target.
In the humidity control method, in step S604, the industrial air conditioner heats up to RH2 as a target.
In the humidity control method, in the step S720, the industrial air conditioner performs temperature compensation with a target of T1.
Has the advantages that:
the invention provides a humidity control method, which is mainly used for dew point control and assisted for relative humidity control, wherein the actual return air dew point D, the control lower limit value D1 of the dew point and the control upper limit value D2 of the dew point are compared firstly, and the working state of an industrial air conditioner is adjusted according to different comparison results; when D1 is not less than D2, the actual relative humidity value RH, the relative humidity control lower limit value RH1 and the relative humidity control upper limit value RH2 are compared, the working state of the industrial air conditioner is adjusted according to different comparison results, unnecessary humidification or dehumidification actions are avoided, and the effects of saving energy and water are achieved.
Drawings
FIG. 1 is a logic control diagram of a humidity control method provided by the present invention;
FIG. 2 is a logic control diagram of another embodiment of the humidity control method provided by the present invention.
Detailed Description
The invention provides a humidity control method, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
Referring to fig. 1, the present invention provides a humidity control method, including the following steps:
s100, setting a return air temperature value T0, a relative humidity value RH0, a relative humidity control lower limit value RH1, a relative humidity control upper limit value RH2 and a return air temperature lower limit value T1 in the controller in advance;
s200, calculating a set value D0 of the return air dew point, a control lower limit value D1 of the dew point and a control upper limit value D2 of the dew point by the controller according to the set T0, RH0, RH1 and RH 2;
s300, calculating an actual return air dew point D by the controller according to the detected actual return air temperature value T and the actual relative humidity value RH;
s400, when D is less than D1, executing step S500, when D1 is less than or equal to D2, executing step S600, when D2 is less than D, executing step S700;
s500, the industrial air conditioner enters a humidifying mode, and the controller controls the industrial air conditioner to humidify;
s600, comparing the sizes of RH, RH1 and RH2 by the controller, and adjusting the working state of the industrial air conditioner according to the comparison result;
s700, the industrial air conditioner enters a dew point dehumidification mode, and a controller controls a compressor of the industrial air conditioner to carry out refrigeration and dehumidification; and only when the actual return air dew point D is higher than the control upper limit value D1 of the dew point, the compressor is started to perform refrigeration and dehumidification, so that the running time of the compressor is shortened, and the energy-saving effect is achieved.
In this embodiment, the compressor may be, but is not limited to, a fixed frequency compressor or an inverter compressor, and when the compressor is an inverter compressor, the operating frequency of the compressor is adjusted according to a dehumidification load or a cooling load when the compressor performs refrigeration dehumidification or refrigeration cooling.
Further, the step S700 further includes the steps of:
s710, the controller compares the actual return air temperature value T with the return air temperature lower limit value T1, and if T is less than T1, the step S720 is executed;
and S720, controlling the industrial air conditioner to start electric heating by the controller to perform temperature compensation.
In the present embodiment, the electric heating may be, but is not limited to, fixed power electric heating or variable power electric heating, and when the electric heating is variable power electric heating, when heating temperature rise is performed, the heating power of the electric heating is adjusted according to a heat load.
Further, the step S600 specifically includes the following steps:
s601, if RH is less than RH1, executing step S602, if RH1 is less than or equal to RH2, executing step S603, and if RH2 is less than RH, executing step S604;
s602, the controller controls a compressor of the industrial air conditioner to be started, refrigeration and cooling are carried out, and the relative humidity is improved;
s603, neither dehumidification nor humidification is carried out on the industrial air conditioner;
and S604, controlling the industrial air conditioner to start electric heating by the controller, heating and raising the temperature, and reducing the relative humidity.
When RH is more than RH2, the actual return air temperature value T is lower than the return air temperature set value T0 or even lower than the return air temperature lower limit value T1, and the electric heating is needed to be started for heating, so that the relative humidity is reduced, the industrial air conditioner can be prevented from firstly refrigerating and dehumidifying, the return air dry bulb temperature is reduced, then the heating and heating are started, the relative humidity is reduced, then the humidification is started, the relative humidity is increased, and the continuous circulation condition is realized, and the purposes of energy saving and water saving are achieved; when RH is less than RH1, the actual return air temperature value is higher than the set value T0 of return air temperature and even higher than the upper limit value of return air temperature (can be preset as T2 in the controller), the compressor is required to be started for cooling, so that the relative humidity is improved, the condition that the industrial air conditioner starts to humidify and raise the humidity firstly, the temperature of a return air dry bulb rises in the humidifying process, then the compressor is started to cool and raise the relative humidity, and then the compressor is continuously started for refrigeration and dehumidification to circulate continuously can be prevented, and the purposes of energy saving and water saving are achieved.
Further, in step S400, the industrial air conditioner humidifies the object at the dew point control lower limit value D1.
Further, in step S700, the industrial air conditioner performs cooling and dehumidification with the control upper limit D2 of the dew point as a target.
Further, in the step S602, the industrial air conditioner performs cooling with RH1 as a target.
Further, in step S604, the industrial air conditioner heats up to RH2 as a target.
Further, in the step S720, the industrial air conditioner performs temperature compensation with a target of T1.
Referring to fig. 2, fig. 2 is a logic control diagram of another embodiment of the humidity control method according to the present invention, in step S400, the industrial air conditioner can humidify with the set value of return air dew point D0 as the target; in the step S700, the industrial air conditioner may perform cooling and dehumidification with the return air dew point set value D0 as a target; in the step S602, the industrial air conditioner may perform cooling with the RH value RH0 as a target; in step S604, the industrial air conditioner may be heated to raise the temperature by targeting the RH value RH 0.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (8)
1. A humidity control method, comprising the steps of:
s100, setting a return air temperature value T0, a relative humidity value RH0, a relative humidity control lower limit value RH1, a relative humidity control upper limit value RH2 and a return air temperature lower limit value T1 in the controller in advance;
s200, calculating a set value D0 of the return air dew point, a control lower limit value D1 of the dew point and a control upper limit value D2 of the dew point by the controller according to the set T0, RH0, RH1 and RH 2;
s300, calculating an actual return air dew point D by the controller according to the detected actual return air temperature value T and the actual relative humidity value RH;
s400, when D is less than D1, executing step S500, when D1 is less than or equal to D2, executing step S600, when D2 is less than D, executing step S700;
s500, the industrial air conditioner enters a humidifying mode, and the controller controls the industrial air conditioner to humidify;
s600, comparing the sizes of RH, RH1 and RH2 by the controller, and adjusting the working state of the industrial air conditioner according to the comparison result;
and S700, the industrial air conditioner enters a dew point dehumidification mode, and the controller controls the industrial air conditioner to refrigerate and dehumidify.
2. A humidity control method according to claim 1, wherein said step S700 further comprises the steps of:
s710, the controller compares the actual return air temperature value T with the return air temperature lower limit value T1, and if T is less than T1, the step S720 is executed;
and S720, controlling the industrial air conditioner to start electric heating by the controller to perform temperature compensation.
3. The humidity control method according to claim 1, wherein the step S600 specifically includes the steps of:
s601, if RH < RH1, executing step S602, if RH1 is less than or equal to RH2, executing step
S603, if RH2 is less than RH, executing step S604;
s602, controlling an industrial air conditioner to refrigerate and cool by a controller;
s603, neither dehumidification nor humidification is carried out on the industrial air conditioner;
and S604, controlling the industrial air conditioner to start electric heating by the controller to heat and raise the temperature.
4. The humidity control method according to claim 1, wherein in step S400, the industrial air conditioner performs humidification with a control lower limit value D1 of a dew point as a target.
5. The method as claimed in claim 1, wherein in step S700, the industrial air conditioner performs cooling and dehumidification with a control upper limit D2 of dew point as a target.
6. The method as claimed in claim 3, wherein in step S602, the industrial air conditioner performs cooling with RH1 as a target.
7. The method as claimed in claim 3, wherein in step S604, the industrial air conditioner is heated to a temperature corresponding to RH 2.
8. The method as claimed in claim 2, wherein in step S720, the industrial air conditioner performs temperature compensation with respect to T1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911251441.8A CN111076316A (en) | 2019-12-09 | 2019-12-09 | Humidity control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911251441.8A CN111076316A (en) | 2019-12-09 | 2019-12-09 | Humidity control method |
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| CN111076316A true CN111076316A (en) | 2020-04-28 |
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| CN201911251441.8A Pending CN111076316A (en) | 2019-12-09 | 2019-12-09 | Humidity control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706971A (en) * | 2020-06-04 | 2020-09-25 | 青岛海尔空调器有限总公司 | Control method and control device for dehumidification of air conditioner and air conditioner |
| CN115127202A (en) * | 2022-07-06 | 2022-09-30 | 深圳嘉力达节能科技有限公司 | Control method for adjusting indoor temperature and humidity based on dew point temperature |
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Cited By (3)
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| CN111706971A (en) * | 2020-06-04 | 2020-09-25 | 青岛海尔空调器有限总公司 | Control method and control device for dehumidification of air conditioner and air conditioner |
| CN111706971B (en) * | 2020-06-04 | 2023-01-13 | 青岛海尔空调器有限总公司 | Control method and control device for dehumidification of air conditioner and air conditioner |
| CN115127202A (en) * | 2022-07-06 | 2022-09-30 | 深圳嘉力达节能科技有限公司 | Control method for adjusting indoor temperature and humidity based on dew point temperature |
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