CN111486513A - Fan coil constant-temperature dehumidification control method based on Internet of things - Google Patents
Fan coil constant-temperature dehumidification control method based on Internet of things Download PDFInfo
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- CN111486513A CN111486513A CN202010332021.9A CN202010332021A CN111486513A CN 111486513 A CN111486513 A CN 111486513A CN 202010332021 A CN202010332021 A CN 202010332021A CN 111486513 A CN111486513 A CN 111486513A
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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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
-
- 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
- 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
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a fan coil constant-temperature dehumidification control method based on the Internet of things, which comprises the following steps of firstly, connecting an air conditioner fan coil and a temperature and humidity sensor to the same network; then, judging the mode and the wind speed of the fan coil according to the current indoor temperature and humidity state, and switching the dehumidification mode, the ventilation mode and the heating mode; when the indoor temperature is reduced in the dehumidification process, the heating mode of the air conditioner is switched to heat, and then the indoor temperature is kept constant. By the intelligent control method of the fan coil, the start time and the end time of dehumidification can be automatically judged in the process of constant-temperature dehumidification of the fan coil, and the automatic control operation of the fan coil can be realized without manual operation of personnel.
Description
Technical Field
The invention belongs to the technical field of smart homes, and particularly relates to a fan coil constant-temperature dehumidification control method based on the Internet of things.
Background
The fan coil is the end product of the air conditioning system, and generally comprises a heat exchange coil, an electric valve, a fan and a controller. The fan provides power to enable the room air to exchange heat with the heat exchange coil pipe, and then supply cold or heat to the room. The controller is internally provided with a temperature sensor for measuring the indoor temperature and controlling the opening and closing of the electric valve.
The fan coil generally has four working modes, namely heating, refrigerating, dehumidifying and ventilating; there are three wind speeds, high, medium and low. The fan coil heating and cooling modes supply heat and cold to the room respectively, and the ventilation mode only circulates indoor air. The dehumidification mode is to cool and dehumidify the air to separate out the moisture in the air, the wind speed is a fixed value, the wind speed cannot be set, and three-gear wind speed can be set in other three modes.
Under the condition of high humidity in rainy season in the south, the walls and articles in the room are mildewed and deteriorated due to humidity. This not only affects the room normal use, also can breed the bacterium and influence personnel's health, therefore, need carry out regularly dehumidification to the room. A dehumidifier is generally installed to dehumidify a room. However, this not only increases the equipment procurement cost, but also requires the periodic removal of the condensed water accumulated in the dehumidifier.
The fan coil of the tail end equipment of the air conditioner also has a dehumidification function, and the dehumidification principle of the air conditioner is the same as that of the dehumidifier, and the air conditioner and the dehumidifier adopt a cooling dehumidification mode. That is, the indoor air is cooled to a dew point temperature or lower, and moisture in the air is precipitated.
However, the fan coil cools the room during dehumidification, and reduces the indoor temperature. This not only increases the indoor relative humidity and makes the condensation more serious, but also makes the humidity between rooms cool and reduces the comfort of human body. And the dehumidifier does not supply cold to the room in the dehumidification process, so the condition of reducing the indoor temperature can not occur.
Therefore, this patent discusses an automatic control method for dehumidifying by using the coil of the air-conditioning fan and preventing the indoor temperature from being excessively low.
The fan coil of the air-conditioning terminal equipment operates in a dehumidification mode in plum rain seasons, and the following problems exist:
1) the start and end conditions of dehumidification cannot be judged. Because the fan coil does not have a humidity sensor, the indoor humidity cannot be detected, and therefore the starting and ending conditions of the fan coil dehumidification mode cannot be judged according to the indoor humidity condition.
2) During dehumidification, the indoor temperature will be relatively low. Under the conditions of rainy season, the indoor humidity is high, the indoor temperature is not high, and the indoor temperature can be reduced in the dehumidification process. This not only can make indoor relative humidity rise, aggravate room dewfall, but also can cause the room to wet cold, reduce human comfort.
3) The fan coil cannot be automatically controlled to operate. The fan coil needs to be manually opened and closed to dehumidify, and automatic operation of equipment cannot be achieved.
Disclosure of Invention
Aiming at the technical problems, the invention provides a fan coil constant-temperature dehumidification control method based on the Internet of things.
In order to achieve the purpose, the invention adopts the technical scheme that: a fan coil constant temperature dehumidification control method based on the Internet of things comprises the steps that firstly, an air conditioner fan coil and a temperature and humidity sensor are connected to the same network; then, switching the operation mode and the wind speed of the fan coil according to the current indoor temperature and humidity state; when the indoor temperature is reduced in the dehumidification process, the heating mode of the air conditioner is switched to heat, and then the indoor temperature is kept constant.
The fan coil temperature-setting dehumidification control method comprises the following steps: an indoor temperature and humidity sensor is adopted to directly detect the indoor air humidity as a basic condition for dehumidification, and the starting condition and the ending condition of dehumidification can be accurately judged; when the indoor temperature is reduced, the heating mode of the air conditioner is automatically switched to heat, so that the indoor temperature is constant; by adopting the cloud intelligent control method, the automatic control operation of the fan coil can be realized, and manual operation of personnel is not needed.
The fan coil temperature-setting dehumidification control method comprises the following steps:
and judging a command value issued to the indoor fan coil at the next moment according to the indoor temperature and humidity state and the state of the fan coil, and further realizing room constant temperature dehumidification through automatic switching of a fan coil mode and air volume.
The method for switching the mode and the air volume of the fan coil comprises the following steps: after the air conditioner is started, the mode and the wind speed of the fan coil are judged according to the current indoor temperature and humidity values, and the dehumidification mode, the ventilation mode and the heating mode are switched.
Presetting an indoor dehumidification starting condition and a target humidity value, and recording an indoor temperature value before dehumidification is started as a constant temperature value of indoor dehumidification. When the relative humidity value in the room is lower than the set humidity value or no more moisture can be separated out from the air, the dehumidification is considered to be finished.
Judgment conditions for the inability to separate out moisture in air: if d is1、d2The moisture content of the air is 1 minute before and after the separation, and d is not less than 01－d2)/d1Less than or equal to 1 percent, the moisture in the air can not be separated out.
The moisture content calculation formula of air is as follows:
wherein: d is the moisture content per kg of dry air, g/kg of dry air; t is the air temperature;
is the relative humidity of the air; PB is the local atmospheric pressure.
Further, the start condition of dehumidification is set to reach the highest humidity value in the room or the humidity value in the room is higher than the target humidity value.
Further, the fan coil constant temperature dehumidification intelligent control method has the following mode switching conditions: after the air conditioner is started, if the current humidity is more than or equal to (target humidity + 10%), starting a dehumidification mode; otherwise, starting a ventilation mode;
if the current humidity is less than the target humidity in the dehumidification mode, or the room can not separate out water any more, and the duration time exceeds a certain time, switching to the ventilation mode; if the current room temperature is lower than (constant room temperature value-4 ℃), and the duration time exceeds a certain time, switching to a heating mode;
if the current room temperature is more than or equal to (the constant room temperature value is-2 ℃) in the ventilation mode, and the current humidity is more than or equal to (the target humidity is + 10%), and the duration time exceeds a certain time, switching to the dehumidification mode; if the current room temperature is less than (constant room temperature value-2 ℃), and the duration time exceeds a certain time, the heating mode is switched.
And if the current room temperature is not less than the constant room temperature value in the heating mode and the duration time exceeds a certain time, entering a ventilation mode.
Further, the current room temperature is taken as a constant room temperature value for each continuous operation in the ventilation mode for more than a certain time (e.g., 30 minutes).
The invention has the following beneficial effects: after an internet of things platform system consisting of the fan coil and the indoor temperature and humidity sensor is built, the cloud can realize automatic switching of the mode and the air volume of the fan coil according to indoor temperature and humidity and the state of the fan coil, and the room is dehumidified under the condition that the indoor temperature is constant.
The automatic control method of the fan coil comprises the following steps: when the indoor humidity is higher, the dehumidification mode is automatically switched to reduce the indoor humidity; in the dehumidification process, if the indoor temperature is obviously reduced, the heating mode is switched to maintain the room temperature to be constant; after dehumidification is finished, switching to a ventilation mode; in the ventilation mode, if the indoor humidity is higher, the mode is switched to the dehumidification mode, and if the temperature is lower, the mode is switched to the heating mode; in the heating mode, when the indoor temperature rises to a constant indoor temperature value, the mode is switched to the ventilation mode.
By the intelligent control method of the fan coil, the start time and the end time of dehumidification can be automatically judged in the process of constant-temperature dehumidification of the fan coil, and the automatic control operation of the fan coil can be realized without manual operation of personnel. In addition, in the constant temperature dehumidification process, the fan coil is started to heat when the indoor temperature is remarkably reduced, and the indoor temperature is prevented from being low.
Drawings
FIG. 1 is a fan coil configuration according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a fan coil temperature-fixing dehumidification control method according to an embodiment of the invention.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following embodiments and the accompanying drawings.
The fan coil constant-temperature dehumidification control method is characterized in that a platform control system is built by adopting the technology of the Internet of things, and then the platform is used for automatically controlling the fan coil to realize constant-temperature dehumidification of a room. The steps are as follows.
1. Internet of things platform system consisting of fan coil and indoor temperature and humidity sensor
Through the internet of things technology, an indoor temperature and humidity sensor and a fan coil controller shown in fig. 1 are assembled in the same network. By using the platform, after the state reported by the indoor temperature and humidity sensor and the fan coil is calculated by an intelligent control method, a corresponding operation instruction is issued to the fan coil controller by the cloud.
2. Determining indoor constant temperature value and dehumidification starting and ending conditions
And recording the indoor temperature value before the dehumidification is started as the constant temperature value of the indoor dehumidification.
Generally, the relative humidity range of the most suitable mould for growth is 75-95%, and the temperature most suitable for the mould growth is 20-30 ℃. Therefore, the start condition of dehumidification is generally set to an indoor humidity of more than 70%, and a target dehumidification humidity value may be set as the start condition.
When the relative humidity value in the room is lower than the set humidity value or no more water can be separated out from the air, the humidity value is determined to be removedAnd (5) finishing the wetting. Judgment conditions for the inability to separate out moisture in air: if d is1、d2The moisture content of the air is 1 minute before and after the separation, and d is not less than 01－d2)/d1Less than or equal to 1 percent, the moisture in the air can not be separated out.
The moisture content calculation formula of air is as follows:
wherein: d is the moisture content per kg of dry air, g/kg of dry air; t is air temperature, DEG C;
air relative humidity,%; pBThe pressure of the local atmosphere can be 101325Pa in plain areas.
3. Cloud intelligent control method for constant-temperature dehumidification of fan coil
As shown in fig. 2, the fan coil constant temperature dehumidification control method is to determine a command value issued to the indoor fan coil at the next moment according to the indoor temperature and humidity state and the fan coil state, and further realize room constant temperature dehumidification through automatic switching of the fan coil mode and the air volume.
The method for switching the mode and the air volume of the fan coil comprises the following steps: after the air conditioner is started, judging the mode and the wind speed of the fan coil according to the current indoor temperature and humidity value; switching a dehumidification mode, a ventilation mode and a heating mode; switching between a ventilation mode, a heating mode and a dehumidification mode; and switching the heating mode and the ventilation mode.
Each mode switching condition is as follows.
TABLE 1 Fan coiler constant temperature dehumidification intelligent control method
After an internet of things platform system consisting of the fan coil and the indoor temperature and humidity sensor is built, the cloud can realize automatic switching of the mode and the air volume of the fan coil according to indoor temperature and humidity and the state of the fan coil, and the room is dehumidified under the condition that the indoor temperature is constant.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention falls within the protection scope of the present invention.
Claims (7)
1. A fan coil temperature-fixing dehumidification control method based on the Internet of things is characterized by comprising the following steps: firstly, connecting an air conditioner fan coil and a temperature and humidity sensor to the same network; then, judging the mode and the wind speed of the fan coil according to the current indoor temperature and humidity state, and switching the dehumidification mode, the ventilation mode and the heating mode;
when the indoor temperature is reduced in the dehumidification process, the heating mode of the air conditioner is switched to heat, and then the indoor temperature is kept constant.
2. The Internet of things-based fan coil temperature-setting and dehumidification control method according to claim 1, characterized in that: presetting an indoor dehumidification starting condition and a target humidity value, and recording an indoor temperature value before dehumidification is started as a constant temperature value of indoor dehumidification; when the relative humidity value in the room is lower than the set humidity value or no more moisture can be separated out from the air, the dehumidification is considered to be finished.
3. The blower coil temperature-setting and dehumidification control method based on the Internet of things as claimed in claim 2, wherein the judgment condition that moisture cannot be separated out from air is as follows: if d is1、d2The moisture content of the air is 1 minute before and after the separation, and d is not less than 01－d2)/d1Less than or equal to 1 percent, the moisture in the air can not be separated out.
The moisture content calculation formula of air is as follows:
wherein: d is the moisture content per kg of dry air, g/kg of dry air; t is the air temperature;
is the relative humidity of the air; pBIs the local atmospheric pressure.
4. A fan coil temperature-setting dehumidification control method based on the internet of things as described in claim 2, wherein the start condition of dehumidification is set to reach a highest indoor humidity value or a higher indoor humidity value than a target humidity value.
5. The Internet of things-based fan coil temperature-setting and dehumidification control method according to claim 2, characterized in that: and recording the indoor temperature value before the dehumidification is started as the constant temperature value of the indoor dehumidification.
6. A fan coil temperature-fixing and dehumidification control method based on the Internet of things as claimed in any one of claims 1 to 5, wherein: the fan coil constant-temperature dehumidification intelligent control method has the following mode switching conditions: after the air conditioner is started, if the current humidity is more than or equal to (target humidity + 10%), starting a dehumidification mode; otherwise, starting a ventilation mode;
if the current humidity is less than the target humidity in the dehumidification mode, or the room can not separate out water any more, and the duration time exceeds a certain time, switching to the ventilation mode; if the current room temperature is less than (constant room temperature value-4 ℃) and the duration time exceeds a certain time, the heating mode is switched.
If the current room temperature is more than or equal to (the constant room temperature value is-2 ℃) in the ventilation mode, and the current humidity is more than or equal to (the target humidity is + 10%), and the duration time exceeds a certain time, switching to the dehumidification mode; if the current room temperature is less than (constant room temperature value-2 ℃), and the duration time exceeds a certain time, the heating mode is switched.
And if the current room temperature is not less than the constant room temperature value in the heating mode and the duration time exceeds a certain time, entering a ventilation mode.
7. The Internet of things-based fan coil constant-temperature dehumidification control method according to claim 6, wherein in the ventilation mode, the current room temperature is taken as a constant room temperature value every time the continuous operation exceeds a certain time.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115127204A (en) * | 2022-03-31 | 2022-09-30 | 浙江中浩电子科技有限公司 | Intelligent humidity control method for air pipe machine line controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115127204A (en) * | 2022-03-31 | 2022-09-30 | 浙江中浩电子科技有限公司 | Intelligent humidity control method for air pipe machine line controller |
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Application publication date: 20200804 |