CN110686365A - Temperature and humidity control method and air conditioning system - Google Patents
Temperature and humidity control method and air conditioning system Download PDFInfo
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- CN110686365A CN110686365A CN201911001579.2A CN201911001579A CN110686365A CN 110686365 A CN110686365 A CN 110686365A CN 201911001579 A CN201911001579 A CN 201911001579A CN 110686365 A CN110686365 A CN 110686365A
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- humidity
- temperature
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- fan coil
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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
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2110/10—Temperature
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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
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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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- 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
- F24F2110/22—Humidity of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses a temperature and humidity control method and an air conditioning system, which comprise the following steps: calculating the heat-humidity ratio of the indoor load according to the temperature and the humidity, and calculating the heat-humidity ratio of the indoor load according to the fan coil humidity analysis factor; judging whether the heat-humidity ratio of the fan coil is equal to the indoor load heat-humidity ratio or not; and if not, adjusting the water inlet temperature of the heat exchanger to change the moisture analysis factor of the fan coil until the heat-moisture ratio of the fan coil is equal to the indoor load heat-moisture ratio. According to the invention, the moisture analysis factor of the fan coil is changed by adjusting the water inlet temperature of the fan coil heat exchanger until the heat-humidity ratio of the fan coil is equal to the indoor load heat-humidity ratio, and the refrigerating capacity of the fan coil is changed by changing the water inlet flow, so that the accurate control of the indoor temperature and humidity is realized, the energy consumption of an air conditioning system is reduced, and the comfort level of a human body is improved.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a temperature and humidity control method and an air conditioning system.
Background
In the process of fan coil model selection, the condition that the cold quantity is too large when the model is selected according to the cold quantity and the air quantity does not meet the design requirement when the model is selected according to the cold quantity often appears. Because the working environment of the fan coil is changed and the moisture analysis factor of the fan coil is not changed, the moisture analysis factor of the fan coil is not matched with the indoor load heat-moisture ratio, the indoor thermal comfort is further influenced, and the efficiency of an air conditioning system is reduced.
Disclosure of Invention
The invention provides a temperature and humidity control method and an air conditioning system, aiming at solving the technical problem that the humidity analysis factor is not matched with the heat-humidity ratio of an indoor load in the prior art.
The technical scheme adopted by the invention is as follows:
the invention provides a temperature and humidity control method, which comprises the following steps:
calculating the heat-humidity ratio of the indoor load according to the temperature and the humidity, and calculating the heat-humidity ratio of the indoor load according to the fan coil humidity analysis factor;
judging whether the heat-humidity ratio of the fan coil is equal to the indoor load heat-humidity ratio or not; and if not, adjusting the water inlet temperature of the heat exchanger to change the moisture analysis factor of the fan coil until the heat-moisture ratio of the fan coil is equal to the indoor load heat-moisture ratio.
The calculation formula of the indoor load heat-humidity ratio epsilon 2 is as follows:wherein h1 is outdoor enthalpy, h2 is indoor enthalpy, d1 is outdoor relative humidity, and d2 is indoor relative humidity.
The calculation formula of the heat-humidity ratio epsilon 1 of the fan coil is as follows:
where xi is the moisture analysis factor, and is obtained according to the calculation formula xi ═ α tw + β, and tw is the average temperature of the water supply and return.
The method for adjusting the water inlet temperature of the heat exchanger specifically comprises the following steps: and when the indoor load heat-humidity ratio is greater than the heat-humidity ratio of the fan coil, gradually increasing the water inlet temperature according to a first preset value until the heat-humidity ratio of the fan coil is equal to the indoor load heat-humidity ratio.
The invention also comprises the following steps: and when the indoor load heat-humidity ratio is smaller than the heat-humidity ratio of the fan coil, gradually reducing the inlet water temperature according to a second preset value until the heat-humidity ratio of the fan coil is equal to the indoor load heat-humidity ratio.
Further comprising the steps of: and judging whether the indoor temperature reaches the preset indoor temperature or not, and if not, increasing the water flow of the heat exchanger.
And presetting indoor temperature and indoor humidity, and calculating the indoor load heat-humidity ratio by acquiring the outdoor temperature, the outdoor humidity, the indoor temperature and the indoor humidity.
The invention also provides an air conditioning system which comprises the fan coil, and the indoor temperature and humidity are controlled by using the temperature and humidity control method.
Furthermore, a water valve for controlling the water flow through a controller is arranged on a water inlet pipe of the heat exchanger of the fan coil. And a third temperature sensor is respectively arranged on a water inlet pipe and a water outlet pipe of the heat exchanger of the fan coil to detect the water inlet temperature and the water outlet temperature.
The invention also comprises a first humidity sensor and a first temperature sensor which are arranged outdoors, and a second humidity sensor and a second temperature sensor which are arranged indoors.
Compared with the prior art, the invention changes the moisture analysis factor of the fan coil by adjusting the water inlet temperature of the heat exchanger of the fan coil until the heat-moisture ratio of the fan coil is equal to the indoor load heat-moisture ratio, and changes the refrigerating capacity of the fan coil by changing the water inlet flow, thereby realizing the accurate control of the indoor temperature and humidity, reducing the energy consumption of an air conditioning system and simultaneously improving the comfort level of a human body.
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 flow chart of the present invention;
FIG. 2 is a schematic diagram of an 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.
As shown in fig. 1, the present invention provides a temperature and humidity control method for an air conditioning system, which specifically includes the steps of: presetting indoor temperature and indoor humidity, acquiring outdoor temperature, outdoor humidity, indoor temperature and indoor humidity, calculating an indoor load heat-humidity ratio according to the outdoor temperature, the outdoor humidity, the indoor temperature and the indoor humidity, and calculating the heat-humidity ratio according to a humidity analysis factor of a fan coil; judging whether the heat-humidity ratio of the fan coil is equal to the indoor load heat-humidity ratio or not; if not, adjusting the water inlet temperature of the fan coil heat exchanger to change the moisture analysis factor of the fan coil until the heat-moisture ratio of the fan coil is equal to the indoor load heat-moisture ratio, so that the humidity is accurately controlled, the energy consumption of an air conditioning system is reduced, and the comfort level of a human body is improved.
In a constant temperature difference variable flow air conditioning system, a humidity analyzing factor xi and a water supply and return average temperature (an average value of a water inlet temperature and a water outlet temperature of a fan coil heat exchanger) are always in a consistent linear relation, and the slope of the humidity analyzing factor xi is only related to the structure of a fan coil, namely xi is alpha tw + beta, tw is the water supply and return average temperature, alpha and beta can be obtained through two sets of variable working condition performance data provided by a manufacturer, and a heat and humidity ratio epsilon 1 corresponding to a fan coil processing direction line (a process of processing an environmental state point to another environmental state point, namely changing the processed air from one state A to another state B) can be represented by the following formula:the heat-humidity ratio epsilon 1 of the fan coil can be adjusted by adjusting the water inlet temperature of the heat exchanger so as to adjust the average temperature of the water supply and return to change the moisture separating factor xi.
The outdoor temperature, the outdoor humidity and the indoor temperature and humidity are obtained through the first humidity sensor 21 and the second temperature sensor 22 which are arranged outdoors and the second humidity sensor 31 and the second temperature sensor 32 which are arranged indoors, the outdoor enthalpy value and the indoor enthalpy value are respectively calculated (the relative humidity, namely the obtained humidity and the dry-bulb temperature, namely the obtained temperature can calculate the corresponding enthalpy value), and then the formula is used for calculating the corresponding enthalpy value
And calculating the indoor load heat-humidity ratio epsilon 2 (wherein h1 is the outdoor enthalpy value, h2 is the indoor enthalpy value, d1 is the outdoor relative humidity, and d2 is the indoor relative humidity).
When the indoor load heat-humidity ratio is not matched with the heat-humidity ratio of the fan coil, namely the indoor load heat-humidity ratio is not equal to the heat-humidity ratio of the fan coil, if the indoor load heat-humidity ratio is larger than the heat-humidity ratio of the fan coil, the water inlet temperature is gradually increased according to a first preset value until the heat-humidity ratio of the fan coil is equal to the indoor load heat-humidity ratio. Specifically, the temperature of the inlet water can be increased by a gradient of 0.5 ℃. If the indoor load heat-humidity ratio is smaller than the fan coil heat-humidity ratio, the water inlet temperature is gradually reduced according to a second preset value to change the average temperature of the supplied and returned water until the heat-humidity ratio of the fan coil is equal to the indoor load heat-humidity ratio, and the water inlet temperature can be reduced by a gradient of 0.5 ℃ to change the average temperature of the supplied and returned water.
The invention also comprises the following steps: whether the indoor temperature reaches the preset indoor temperature is judged, if not, the water flow of the heat exchanger is increased, the refrigerating capacity of the fan coil is further changed, the set temperature is finally reached, the accurate control of the temperature and the humidity is realized, the comfort level of a human body is improved, and the energy consumption of an air conditioning system is reduced.
As shown in fig. 2, the present invention further provides an air conditioning system, which includes a fan coil 1, and the temperature and humidity in the room are controlled by using the temperature and humidity control method. Wherein, be equipped with the water valve 13 through controller regulation water flow on the inlet tube 11 of fan coil 1's heat exchanger for change fan coil's refrigerating capacity, and inlet tube 11 and outlet pipe 12 of fan coil's heat exchanger and the position that is close to the heat exchanger are equipped with third temperature sensor respectively and detect temperature of intaking and the temperature of going out water, the controller of being convenient for adjusts the temperature of intaking and calculates the supply return water average temperature according to detecting the temperature, still detect outdoor humidity and temperature including setting up at outdoor first humidity transducer 21 and second temperature sensor 22 simultaneously, the setting is at indoor second humidity transducer 31 and the indoor temperature and humidity of second temperature sensor 32 detection.
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 (11)
1. A temperature and humidity control method is characterized by comprising the following steps:
calculating the heat-humidity ratio of the indoor load according to the temperature and the humidity, and calculating the heat-humidity ratio of the indoor load according to the fan coil humidity analysis factor;
judging whether the heat-humidity ratio of the fan coil is equal to the indoor load heat-humidity ratio or not; and if not, adjusting the water inlet temperature of the heat exchanger to change the moisture analysis factor of the fan coil until the heat-moisture ratio of the fan coil is equal to the indoor load heat-moisture ratio.
2. The temperature and humidity control method according to claim 1, wherein the indoor load heat-humidity ratio e 2 is calculated by the following formula:
wherein h1 is outdoor enthalpy, h2 is indoor enthalpy, d1 is outdoor relative humidity, and d2 is indoor relative humidity.
3. The temperature and humidity control method according to claim 1, wherein the fan coil heat-humidity ratio e 1 is calculated by the following formula:
where xi is the moisture analysis factor and is obtained according to the calculation formula xi ═ α tw + β, and tw is the average temperature of the supply and return water.
4. The temperature and humidity control method according to claim 1, wherein the adjusting of the inlet water temperature of the heat exchanger specifically comprises: and when the heat-humidity ratio of the indoor load is greater than the heat-humidity ratio of the fan coil, the inlet water temperature is gradually increased according to a first preset value.
5. The method for controlling temperature and humidity according to claim 4, wherein the adjusting of the inlet water temperature of the heat exchanger further comprises: and when the heat-humidity ratio of the indoor load is smaller than the heat-humidity ratio of the fan coil, the inlet water temperature is gradually reduced according to a second preset value.
6. The temperature and humidity control method according to claim 1, further comprising the steps of: and judging whether the indoor temperature reaches the preset indoor temperature or not, and if not, increasing the water flow of the heat exchanger.
7. The temperature/humidity control method according to claim 1, wherein an indoor temperature and an indoor humidity are preset, and the indoor load heat/humidity ratio is calculated by obtaining the outdoor temperature, the outdoor humidity, the indoor temperature, and the indoor humidity.
8. An air conditioning system comprising a fan coil, wherein the temperature and humidity in a room are controlled by the temperature and humidity control method according to any one of claims 1 to 7.
9. The air conditioning system of claim 8, wherein the fan coil heat exchanger inlet duct is provided with a water valve that controls the flow of water through the controller.
10. The air conditioning system of claim 8, wherein a third temperature sensor is provided on each of the inlet and outlet pipes of the heat exchanger of the fan coil to detect the inlet and outlet water temperatures.
11. The air conditioning system as claimed in claim 8, further comprising a first humidity sensor and a first temperature sensor disposed outdoors, and a second humidity sensor and a second temperature sensor disposed indoors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911001579.2A CN110686365A (en) | 2019-10-21 | 2019-10-21 | Temperature and humidity control method and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911001579.2A CN110686365A (en) | 2019-10-21 | 2019-10-21 | Temperature and humidity control method and air conditioning system |
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| Publication Number | Publication Date |
|---|---|
| CN110686365A true CN110686365A (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911001579.2A Withdrawn CN110686365A (en) | 2019-10-21 | 2019-10-21 | Temperature and humidity control method and air conditioning system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137663A (en) * | 2021-04-15 | 2021-07-20 | 科宇智能环境技术服务有限公司 | VAV air conditioning system and control method thereof |
| CN113339941A (en) * | 2020-07-06 | 2021-09-03 | 浙江大学 | Control method of variable frequency air conditioner |
| CN114183848A (en) * | 2021-12-14 | 2022-03-15 | 珠海格力电器股份有限公司 | Evaporation cooling type combined heat exchanger, control method thereof, air conditioner and storage medium |
-
2019
- 2019-10-21 CN CN201911001579.2A patent/CN110686365A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339941A (en) * | 2020-07-06 | 2021-09-03 | 浙江大学 | Control method of variable frequency air conditioner |
| CN113137663A (en) * | 2021-04-15 | 2021-07-20 | 科宇智能环境技术服务有限公司 | VAV air conditioning system and control method thereof |
| CN113137663B (en) * | 2021-04-15 | 2022-07-15 | 科宇智能环境技术服务有限公司 | VAV air conditioning system and control method thereof |
| CN114183848A (en) * | 2021-12-14 | 2022-03-15 | 珠海格力电器股份有限公司 | Evaporation cooling type combined heat exchanger, control method thereof, air conditioner and storage medium |
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Application publication date: 20200114 |