CN112032977A - Room temperature adjusting method and charging method for heating air-conditioning system and room temperature control valve - Google Patents
Room temperature adjusting method and charging method for heating air-conditioning system and room temperature control valve Download PDFInfo
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- CN112032977A CN112032977A CN202010459393.8A CN202010459393A CN112032977A CN 112032977 A CN112032977 A CN 112032977A CN 202010459393 A CN202010459393 A CN 202010459393A CN 112032977 A CN112032977 A CN 112032977A
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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
- 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
- F24F11/47—Responding to energy costs
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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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/80—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
- F24F11/85—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 variable-flow pumps
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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
Abstract
The invention relates to a room temperature regulating method and charging method for heating air-conditioning system and room temperature control valve, during the period of closing the valve, the stored water in the radiator stops flowing and gradually approaches or equals to the indoor temperature, the valve is opened again, the part of stored water flows through a backwater temperature sensor, the controller detects the average temperature as the indoor temperature or the average value of the indoor temperature, then the opening time of the valve is determined according to the difference value of the temperature and the set value of the room temperature, after the valve is opened, the indoor temperature gradually approaches the set value of the room temperature, the valve is closed again, the stored water in the radiator gradually approaches or equals to the indoor temperature, the valve is opened again, and the cycle is repeated, the indoor temperature can approach or equals to the set value of the room temperature, thereby realizing the accurate regulation of the indoor temperature without the indoor temperature sensor and providing the accurate indoor, the cost is reduced, and the phenomenon that the correct indoor temperature value cannot be acquired due to improper installation or man-made interference, deception and tampering is avoided.
Description
Technical Field
The invention relates to a room temperature adjusting method and a charging method of a heating air-conditioning system and a room temperature control valve, in particular to a room temperature adjusting method and a temperature area method charging method of a heating air-conditioning system which adopts hot water and cold water as cold heat sources and a room temperature control valve without an indoor temperature sensor.
Background
As is well known, the heating and air-conditioning system widely has the phenomenon of temperature imbalance of higher room temperature and lower room temperature, in order to reduce the temperature imbalance, a valve is additionally arranged on a water pipeline of each regulating object to control water flow and regulate the indoor temperature of the regulating object, so that the temperature imbalance is avoided. In order to implement the above-mentioned adjustment scheme, the prior art is to add an indoor temperature sensor in the room of the adjustment object to detect the indoor temperature, and to perform opening and closing or opening control on the valve after comparing the detected indoor temperature with the indoor temperature set value, which not only needs the indoor temperature sensor, but also needs to transmit the temperature signal to the controller connected with the valve, which increases the cost of the system both in a wired manner and a wireless manner, increases the difficulty of the house-entry construction and the future house-entry management, and also has the defect that the correct indoor temperature signal cannot be collected due to improper installation position selection or artificial interference, deception and tampering performed on the temperature signal by the user. Certainly, there is also an adjustment scheme, do not adopt indoor temperature sensor, only adopt return water temperature sensor, carry out continuous control to discharge through detecting return water temperature, guarantee that each regulation object supplies the return water difference in temperature one, in order to avoid the temperature imbalance, but this requires the product of radiator heat transfer area and heat transfer coefficient of all regulation objects to match with indoor load, this just can hardly be realized at all, and different indoor loads still can have different laws of change, in addition the user often still can change different radiators when fitment room, this can lead to changing the indoor temperature of the user who uses bigger heat transfer area or heat transfer coefficient far beyond other users, so this scheme is although simple, but can not guarantee that all regulation objects 'indoor temperature is unanimous, also can't avoid the temperature imbalance. The existing charging methods comprise a flow temperature difference method, a time on-off area method and a temperature area method, wherein the flow temperature difference method does not need to collect indoor temperature, but inevitable inter-household heat transfer can influence the fairness of the indoor temperature; the time on-off area method has strict requirements on the balance of a water system and the consistency of a radiator, and has low applicability; the temperature area law needs to collect and record the indoor temperature, usually, a temperature sensor is arranged indoors, a temperature signal is transmitted to a controller in a wired mode or a wireless mode and stored for charging, meanwhile, the controller controls the flow of a valve according to the difference value between the indoor temperature and an indoor temperature set value to adjust the indoor temperature, although the charging mode is simple and fair, the charging mode inevitably has the phenomenon that the correct indoor temperature value cannot be collected due to improper installation position selection or manual interference, deception and tampering of a user on the temperature value, and further causes inaccurate charging, and the charging problems always bother the heat supply world for many years, so that the heat supply charging cannot be smoothly popularized all the time.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the indoor temperature is accurately adjusted under the condition that an indoor temperature sensor is not adopted to detect the indoor temperature; an accurate indoor temperature value is provided for charging, and simple and credible charging is realized; and an indoor temperature control valve without an indoor temperature sensor.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the water flow of the radiator is changed by controlling the electric valve to adjust the room temperature, a backwater temperature sensor is arranged on a backwater pipeline or the backwater electric valve, the stored water in the radiator stops flowing and is gradually close to or equal to the room temperature during the turn-off period of the electric valve, when the turn-off time of the electric valve is over and is re-opened, the stored water close to or equal to the room temperature in the radiator flows through the backwater temperature sensor, the controller takes the average temperature of the stored water in the radiator detected by the backwater temperature sensor as the actual value or the average value of the room temperature, the controller determines the opening time of the electric valve according to the difference value between the temperature value and the set value of the room temperature in the controller, the room temperature gradually approaches the set value of the room temperature during the turn-on period of the electric valve, then the electric valve, when the electric valve is reopened again, the controller redetermines the opening time of the electric valve according to the difference value between the average value of the temperature of the water stored in the radiator and the indoor temperature set value detected by the return water temperature sensor and the opening time of the electric valve last time, during the opening period of the electric valve, the opening time of the electric valve is corrected according to the difference value between the average value of the temperature of the return water at this time and the average value of the temperature of the return water at last time until the electric valve is closed, and the indoor temperature can be close to or equal to the indoor temperature set value after the circulation is continued all the time, the indoor temperature set value can be preset before the controller leaves a factory or can be sent to the controller in a wireless or wired mode, the turn-off time of the electric valve is determined according to the type and the heat dissipation condition of the.
The controller respectively opens and closes the electric valve for two times or more than two times when the water supply temperature and the return water temperature are the same and the indoor temperature is not fluctuated greatly, the closing time of each time is different, according to the average value of the temperature of the water stored in the radiator detected by the return water temperature sensor, the controller can establish a simple heat dissipation mathematical model for the radiator through an artificial intelligence algorithm, and although the time for closing the electric valve each time is less than the time required by the water stored in the radiator to be close to or equal to the indoor temperature, the controller can calculate the indoor temperature by using the heat dissipation mathematical model of the radiator.
The controller respectively opens and closes the electric valve for multiple times of circulation when different water supply and return water temperatures and indoor temperatures exist, the closing time of each time is different, according to the average value of the temperature of the water in the radiator detected by the return water temperature sensor, the controller can establish a perfect heat dissipation mathematical model for the radiator through an artificial intelligence algorithm, and although the time for closing the electric valve each time is less than the time required by the water stored in the radiator to be close to or equal to the indoor temperature, the controller can calculate the indoor temperature by utilizing the heat dissipation mathematical model of the radiator.
The controller respectively opens and closes the electric valve for a plurality of times when different return water temperatures, indoor temperatures and indoor temperature set values exist, the opening time of each time is different, the average value of the temperature of the water in the radiator detected by the return water temperature sensor after the electric valve is closed and reopened is detected, the controller can establish a heating or refrigerating mathematical model for an adjusting object through an artificial intelligence algorithm, then the controller can determine the opening time of the electric valve each time according to the mathematical model, if the controller can also obtain real-time water supply temperature and real-time meteorological parameters through a wireless or wired mode, the electric valve is opened and closed for a plurality of times for circulation, the controller can establish a circuit containing the real-time meteorological parameters, the wired parameters and the real-time meteorological parameters for the controlling object through the artificial intelligence algorithm, The controller can accurately select the valve opening time of each time according to the mathematical model, thereby reducing the fluctuation range of the indoor temperature.
The controller is internally preset with a backwater temperature set value, or acquires parameters such as meteorological parameters, water supply temperature, indoor temperature, an indoor temperature set value, the opening degree of other electric valves in a wireless or wired mode, and automatically generates a backwater temperature set value capable of saving the energy consumption of the water pump to the maximum extent according to the indoor temperature and the indoor temperature set value, during the opening period of the electric valves, the controller adjusts the opening degree of the electric valves according to the difference value of the actual backwater temperature and the backwater temperature set value to enable the actual backwater temperature to be close to or equal to the backwater temperature set value so as to reduce the water flow, meet the water quantity requirements of other water-deficient users, realize dynamic hydraulic balance and reduce the power consumption of the water pump, during the summer refrigeration, the controller considers the various factors except for the factors when determining the backwater temperature set value, and a set value of return water temperature which can meet the cooling requirement, ensure the dehumidification capacity and save the energy consumption of the water pump to the maximum extent is determined according to the dehumidification capacity of the radiator.
The electric valve is a three-way valve, two water inlets of the three-way valve are respectively connected with a group of radiators and a water return port of a bypass pipe, a water outlet of the three-way valve is connected with a water return pipeline, a water return temperature sensor is arranged on the water return pipeline or the water outlet of the water return electric three-way valve, the electric actuator can control the three-way valve to respectively realize full opening, full closing and one opening and one closing of two flow passages, during the time that the flow passage of the electric three-way valve is turned off at fixed time, the stored water in the bypass pipe stops flowing and is gradually close to or equal to the indoor temperature, when the flow passage of the electric three-way valve is turned on again after the turn-off time is over, the stored water in the bypass pipe close to or equal to the indoor temperature flows through the water return temperature sensor, and the controller averages, the controller determines the opening time or opening degree of the electric three-way valve radiator flow channel according to the difference value between the temperature value and the indoor temperature set value in the controller, the radiator is in a normal heating or refrigerating state during the whole room temperature control period, the bypass pipe is only used for temperature measurement and bypass flow of the bypass pipe crossing the radiator, in the vertical series heating system, the bypass pipe crosses the bypass flow of the radiator, on the premise of meeting the indoor temperature, the temperature measurement times are increased as much as possible, and the room temperature fluctuation is reduced.
The electric valve is a three-way valve, two water inlets of the three-way valve are respectively connected with a group of radiators and a water return port of a bypass pipe, a water outlet of the three-way valve is connected with a water return pipeline, a water return temperature sensor is arranged on the water return pipeline or the water outlet of the water return electric three-way valve, the electric actuator can control the three-way valve to respectively realize full opening, full closing and one opening and one closing of two flow passages, during the time that the flow passage of the electric three-way valve is turned off at fixed time, the stored water in the bypass pipe stops flowing and is gradually close to or equal to the indoor temperature, when the flow passage of the electric three-way valve is turned on again after the turn-off time is over, the stored water in the bypass pipe close to or equal to the indoor temperature flows through the water return temperature sensor, and the controller averages, the controller determines the opening time or opening degree of the electric three-way valve radiator flow channel according to the difference value between the temperature value and the indoor temperature set value in the controller, the radiator is in a normal heating or refrigerating state during the whole room temperature control period, the bypass pipe is only used for temperature measurement and bypass flow of the bypass pipe crossing the radiator, in the vertical series heating system, the bypass pipe crosses the bypass flow of the radiator, on the premise of meeting the indoor temperature, the temperature measurement times are increased as much as possible, and the room temperature fluctuation is reduced.
The method is characterized in that a backwater temperature sensor is installed on a backwater pipeline or a backwater electric valve, during the turn-off period of the electric valve, stored water in a radiator stops flowing and is gradually close to or equal to the indoor temperature, when the electric valve is opened again, water close to or equal to the indoor temperature in the radiator flows through the backwater temperature sensor, the backwater temperature sensor detects the temperature of the water stored in the radiator and takes the temperature as the indoor temperature after averaging, and then the cost of the heating and air conditioning is shared according to the ratio of the room area to the total area and the total energy consumption, or the cost of the heating and air conditioning is directly calculated according to the.
The water return pipe or the water return electric three-way valve is provided with a water return temperature sensor, during the period that one runner of the electric three-way valve is closed, the stored water in a group of radiators or by-pass pipes stops flowing and is gradually close to or equal to the indoor temperature, when the runner is opened again, the stored water close to or equal to the indoor temperature in the group of radiators or by-pass pipes flows through the water return temperature sensor, the water return temperature sensor detects the temperature of the stored water in the group of radiators or by-pass pipes and averages the temperature to be used as the indoor temperature, and then the heating and air conditioning cost is divided according to the ratio of the room area to the total area of the building and the total energy consumption of the building, or the heating and air conditioning.
The room temperature control valve comprises an electric actuator and a valve body, and further comprises a controller and a backwater temperature sensor, wherein the controller is connected with the electric actuator and the backwater temperature sensor, the controller can receive signals of set values of starting, shutting down and indoor temperature, and can also output signals of three speeds, namely high speed, medium speed and low speed, of a fan according to the set values of the indoor temperature and the average temperature of the memory level of the radiator detected by the backwater temperature sensor.
By adopting the technical scheme, the method can be realized: the indoor temperature is accurately regulated under the condition that an indoor temperature sensor is not adopted to detect the indoor temperature, and an accurate indoor temperature value is provided for charging, so that the cost of the system is reduced, the house-entry construction and the house-entry management in future are avoided, and the phenomenon that correct temperature signals cannot be collected due to improper installation position selection or artificial interference, deception and tampering of temperature signals by users is avoided, so that fair, reasonable, simple and credible charging is realized.
Drawings
Fig. 1 is a schematic view of a first embodiment of room temperature adjustment of a heating and air-conditioning system.
Fig. 2 is a graph showing the change in the temperature of the water stored in the radiator with time during heating.
Fig. 3 is a schematic view of a second embodiment of the room temperature adjustment of the heating and air-conditioning system.
Fig. 4 is a schematic view of a third embodiment of room temperature adjustment of a heating and air-conditioning system.
Fig. 5 is a schematic view of a fourth embodiment of the room temperature adjustment of the heating and air-conditioning system.
Fig. 6 is a schematic view of a fifth embodiment of room temperature adjustment of a heating and air-conditioning system.
Fig. 7 is a schematic view of a room temperature control valve without an indoor temperature sensor.
Detailed Description
In order to avoid the phenomenon of temperature imbalance widely existing in a heating air-conditioning system, a valve is additionally arranged on a water pipeline of each regulating object to control water flow, so that the indoor temperature of each regulating object is regulated, and the room temperature fluctuation caused by the on-off control of the cold and heat source flow is completely acceptable in the comfort of a human body.
As shown in fig. 1, after the electric backwater valve 4 shuts off the flow of the cold and heat source, since the thermal inertia of the adjustment object is much larger than that of the radiator 1, when the actual indoor temperature changes slightly, the temperature of the water stored in the radiator 1 will approach or reach the actual indoor temperature of the room very quickly, which is, of course, related to the type of the radiator 1, the heat dissipation condition and the amount of the stored water, for example, the temperature of the water in the fan coil with the fan forced convection heat exchange will approach or reach the actual indoor temperature of the room very quickly; after the electric valve 4 opens the flow of the cold and heat source each time, the return water temperature is detected by the return water temperature sensor 5 installed on the return water pipeline 3 or the return water electric valve 4, the dead water temperature (the water temperature detected by the return water temperature sensor 5 before the valve is opened) in the return water pipeline 3 detected by the return water temperature sensor 5 immediately after the flow of the cold and heat source is recovered and the temperature value of the cold and heat source entering the radiator 1 from the water supply pipeline 2 and flowing through the return water temperature sensor 5 after the return water pipeline 3 and the return water temperature sensor 5 are opened is eliminated, and then the indoor temperature value or the indoor temperature average value can be obtained after the effective temperature data are averaged. If the indoor temperature value or the average indoor temperature value meets the requirements of the user, the valve can be turned off again at the moment; if the water storage quantity in the radiator 1 is too small and the time constant of the return water temperature sensor 5 is large, after the electric valve 4 is opened every time, the temperature of the water stored in the radiator 1 detected by the return water temperature sensor 5 is deviated, at the moment, only one part of flow channels are opened by the electric valve 4 at each time, so that the water stored in the radiator 1 slowly flows through the return water temperature sensor 5, and after the detected return water temperature is changed violently (indicating that the water supply temperature influences the measured data), all the flow channels are opened to increase the data quantity and reduce the temperature measurement deviation. The controller 6 compares the average temperature value of the water stored in the radiator 1 with the indoor temperature set value according to the effective data detected by the backwater temperature sensor 5 to obtain the difference value between the actual value and the set value of the indoor temperature, and determines the opening time of the electric valve 4 according to the difference value and the real-time backwater temperature value, i.e. the larger the difference value is, the longer the corresponding valve opening time is, the more the cold and heat provided by the cold and heat source is, so that the difference between the actual value and the set value of the indoor temperature is smaller, and even the reverse difference value occurs unless the parameters of the pressure, the flow, the temperature and the like of the cold and heat source cannot meet the requirements of the user on the indoor temperature. After the opening time is over, the electric valve 4 is turned off, the stored water in the radiator 1 stops flowing, the temperature of the stored water is close to or reaches the actual indoor temperature of a room quickly, the electric valve 4 is turned on again after the turning-off time is over, the detected temperature of the stored water in the radiator 1 is the actual indoor temperature, the controller 6 can deduce the current valve opening time according to the temperature, the detected stored water temperature of the radiator 1 and the last valve opening time, the change of the water supply temperature and the water supply pressure is reflected on the return water temperature in the valve opening period, the valve opening time can be corrected according to the comparison between the average value of the real-time return water temperature and the average value of the return water temperature in the last valve opening period, and the operation is repeated all the time, so that the fluctuation of the actual indoor temperature near the temperature set value can be. The controller 6 opens and closes the valve for multiple times when the water return temperature, the indoor temperature and the indoor temperature are different, the opening time is different every time, according to the water storage temperature in the radiator 1 detected by the water return temperature sensor 5 after the valve is opened every time, the controller 6 can establish a heating or refrigerating mathematical model for an adjusting object through an artificial intelligence algorithm, and then the time of opening the electric valve 4 every time can be determined according to the mathematical model. The valve opening time is closely related to the room load and the cold and heat source parameters, and the room load is related to the outdoor meteorological parameters and the indoor set temperature values. Through a wireless or wired mode, a user can also upload and modify an indoor set temperature value to the controller 6, if the controller 6 can obtain real-time water supply temperature, water supply pressure and real-time meteorological parameters, the controller 6 can establish a more perfect heating or refrigerating mathematical model containing multiple parameters such as water supply temperature, water supply pressure, water return temperature, indoor actual temperature, set temperature value and real-time meteorological parameters for a control object through an artificial intelligence algorithm after the electric valve 4 is opened and closed for multiple times, and the controller 6 can accurately select the valve opening time for each time according to the mathematical model, so that the fluctuation range of the indoor temperature is reduced. This part of the complex calculation can be implemented by the upper computer.
The key of the room temperature adjusting method of the heating air-conditioning system is how to accurately detect the indoor temperature in a short time so as to reduce the fluctuation of the indoor temperature and improve the room temperature control precision. The controller 6 can preset valve turn-off time before leaving factory or after installation, the valve turn-off time is preliminarily determined according to the type and heat dissipation condition of the radiator 1 and the water storage amount, for example, the water temperature in a fan coil with fan for forced convection heat exchange can very quickly approach or reach the actual indoor temperature of a room, the time required by floor heating is longer, and the turn-off time of the electric valve 4 can ensure that the water stored in the radiator 1 can be fully dissipated. After the flow of the cold and heat source is recovered each time, the water-storing temperature in the radiator 1 is detected by using the return water temperature sensor 5 arranged on the return water pipeline 3 or the return water electric valve 4, and the water-storing temperature can represent the indoor actual temperature. If the turn-off time of the electric valve 4 is too short, the stored water in the radiator 1 may cause deviation due to insufficient heat dissipation, if the turn-off time of the electric valve 4 is too long, the fluctuation range of the indoor temperature is large, meanwhile, the valve opening time may be shortened, when the intensity of a cold and hot source is insufficient, the requirement of a user on the temperature cannot be met, and certainly, the fan coil system does not have the problem. The change of the water temperature in the radiator 1 with time is an exponential curve, as shown in a curve 1 of fig. 2, a curve 2 represents the change of the indoor temperature with time, T represents the temperature, T0 represents the average temperature of the water stored at the valve closing time, Tr1 represents the actual indoor temperature at the valve closing time, Tr2 represents the actual indoor temperature at the valve closing end time, Tr represents the actual indoor average temperature during the valve closing period, T represents the time, and te represents the valve closing time, the water temperature infinitely approaches the actual indoor temperature, when the water temperature in the radiator 1 changes gradually, the actual indoor temperature changes in the same direction, as shown in a curve 2 of fig. 2, so that I can consider that the final temperature of the water stored in the radiator 1 can represent the average value of the actual indoor temperature during the period, as shown in a temperature value Tr at a time in the graph, the temperature value is detected by the backwater temperature sensor 5 and can be used as the average value of the indoor actual temperature. If the electric valve 4 is closed twice or more times respectively when the water supply temperature and the return water temperature are the same and the indoor temperature is not large in fluctuation, the controller 6 can establish a simple heat dissipation mathematical model of the radiator 1 through an artificial intelligence algorithm according to the water storage temperature detected by the return water temperature sensor 5 every time, namely, establish a heat dissipation curve of the radiator 1 at a certain water supply temperature, return water temperature and indoor actual temperature through two or more points, and then the indoor actual temperature can be calculated by utilizing the heat dissipation mathematical model of the radiator 1 although the time for closing the electric valve 4 every time is less than te. When different water supplies and return water and indoor temperature, close electric valve 4 many times respectively, close the time difference at every turn, according to the water storage temperature that return water temperature sensor 5 detected at every turn, controller 6 accessible artificial intelligence algorithm establishes a perfect heat dissipation mathematical model that contains water supply temperature, return water temperature, indoor actual temperature for radiator 1, recycles radiator 1 heat dissipation mathematical model and calculates the indoor temperature to reduce the time of closing the valve at every turn.
When the indoor temperature can be guaranteed only by short valve opening time at each time, the refrigeration and heating intensity of a cold and heat source is high, namely, the water flow is too high, the water flow at other places is possibly too small or the energy consumption of the water pump is too high, the water flow is too high and is represented as too small temperature difference of supply and return water on the temperature difference of supply and return water, and if part of the flow is reduced, namely the temperature difference of supply and return water is increased, the power consumption of the water pump can be reduced while the indoor temperature of each room is guaranteed. The controller 6 is internally preset with a backwater temperature set value, or sends a backwater temperature set value automatically generated by an artificial intelligence algorithm according to meteorological conditions, water supply temperature, water supply pressure, indoor temperature set value, other valve opening and other factors to the controller 6 in a wireless or wired mode, during the opening period of the electric valve 4, the controller adjusts the opening of the electric valve 4 according to the difference value of the actual backwater temperature and the backwater temperature set value, so that the actual backwater temperature is close to or equal to the backwater temperature set value, the power consumption of the water pump is reduced, the water quantity requirements of other water-deficient users are met, dynamic hydraulic balance can be effectively realized by controlling the backwater temperature, and water flow is really supplied according to needs. However, during cooling in summer, the set value of the return water temperature cannot only be considered to meet the indoor temperature value, but also should be considered to meet the indoor humidity value, because the overhigh return water temperature can greatly reduce the dehumidification capacity of the radiator, and has little influence on the cooling capacity, the controller 6 determines the set value of the return water temperature according to the weather conditions, the water supply temperature, the indoor temperature, the set value of the indoor temperature, the relationship between the dehumidification capacity of the radiator and the return water temperature, and the set value of the return water temperature which can meet the cooling requirement and ensure the dehumidification capacity, so that the humidity requirement can be met at the same time of meeting the indoor temperature requirement.
If the backwater temperature sensor 5 arranged on the backwater pipeline 3 or the backwater electric valve 4 is in the same space with the radiator 1, after the electric valve 4 shuts off the cold and heat source flow, the water temperature around the backwater temperature sensor 5 gradually approaches or reaches the actual indoor temperature of a room, by analyzing the real-time temperature data detected by the backwater temperature sensor 5, when the change rate of the real-time temperature data approaches 0, the real-time temperature data at the moment can be considered to represent the actual indoor temperature, because the water storage amount in the backwater pipeline 3 or the backwater electric valve 4 is less than the water storage amount in the radiator 1, the shut-off time of the electric valve 4 required by obtaining the actual indoor temperature through the method is less than the time required by the water storage amount in the radiator 1 approaching or reaching the actual indoor temperature of the room, therefore, the method can accurately detect the indoor temperature in a shorter time, the control precision of the room temperature is improved, and the fluctuation of the room temperature is reduced. In order to prevent the temperature data from being artificially interfered, the turn-off time of the electric valve 4 can be increased frequently and randomly so as to meet the time required by the stored water in the radiator 1 to be close to or reach the actual temperature in a room, the backwater electric valve 4 is opened again to detect the temperature of the stored water in the radiator 1, and the temperature of the stored water is compared with the temperature data detected by the backwater temperature sensor 5 before the backwater electric valve 4 is opened, the temperature data and the backwater temperature data are within an acceptable error range, otherwise, the phenomenon that people interfere the temperature data can be considered to exist.
If the electric valve shuts off the flow and waits for the stored water to cool down or heat up to prepare for detecting the room temperature, a part of radiators are still in the normal heating or cooling state, thus the fluctuation of the room temperature caused by detecting the room temperature is much smaller, when the electric valve is in partial load, the part of radiators can already meet the requirement of the room temperature, the other part of radiators are specially used for detecting the room temperature, and the detection of the room temperature and the normal heating or cooling are not influenced mutually.
The second embodiment of the room temperature adjustment of the heating air conditioning system is shown in fig. 3, the radiators are divided into two groups, namely, the radiator 1 and the radiator 11 are connected in parallel, the backwater electric valve is an electric three-way valve 44, two water inlets of the electric three-way valve are respectively connected with the backwater inlets of the two groups of radiators, a water outlet of the electric three-way valve is connected with a backwater pipeline 3, a backwater temperature sensor 5 is arranged on one side of the backwater pipeline 3 or the water outlet of the backwater electric three-way valve 44, the electric actuator can control the three-way valve to respectively realize full opening, full closing and one opening and one closing of two flow channels, during the period that one flow channel of the electric three-way valve 44 is closed and the other flow channel is opened, the stored water in one group of radiators stops flowing and gradually approaches or equals to the room temperature, when the flow channel of, the controller 6 averages the temperature of the water stored in the radiator 1 or the radiator 11 detected by the backwater temperature sensor and then takes the averaged temperature as an actual indoor temperature value or an average indoor temperature value, and the controller 6 determines the respective opening and closing time or opening degree of the flow channels of the two groups of radiators of the electric three-way valve 44 according to the difference value between the temperature value and the indoor temperature set value in the controller. During the whole room temperature control period, one group of radiators are always in a normal heating or cooling state, so that the room temperature fluctuation caused by closing the other group of radiators for temperature measurement preparation is small, and the time for turning off the flow for detecting the room temperature can be increased; if the group of radiators can meet the requirement of room temperature, the other group of radiators can be completely in a circulating temperature measurement state, otherwise, the radiators are in a state of alternately performing heating and cooling and temperature measurement. By utilizing an artificial intelligence algorithm, on the premise of meeting the indoor temperature, the temperature measurement times are increased as much as possible, the fluctuation of the room temperature is reduced, and the opening degree of a valve radiator flow passage can be reduced while the requirement of the room temperature is met, so that the temperature difference of supply and return water is improved, and the power consumption of a water pump is reduced. Any one of the two groups of radiators can be randomly selected for detecting the room temperature during operation, so that the artificial interference on temperature measurement is avoided. The two groups of radiators can be placed in a room; or each group of radiators can be divided into a plurality of radiators which are connected in parallel or in series to form a group of radiators, and two radiators which belong to two groups are placed in each room of one unit, so that one radiator in each room is in a normal heating or cooling state, and the room temperature fluctuation is small. All radiators in one unit can be divided into two groups, and the radiators of adjacent or rooms easy to transfer heat are preferably divided into two groups, wherein when the radiator in one room is closed to prepare temperature measurement, the radiators of the adjacent or rooms easy to transfer heat are in a normal heating or cooling state, and room temperature fluctuation is small. Certainly, a group of radiators can be respectively arranged in every two adjacent rooms or every two rooms which are easy to transfer heat in one unit, so that every two rooms can be used as a system, but the two rooms can be independently regulated in temperature respectively, only one set of controller and electric three-way valve is needed at the moment, the temperature set values of the two rooms are needed to be preset in the controller, and the two groups of radiators are not in temperature measuring states at the same time.
A third embodiment of room temperature adjustment of a heating and air conditioning system is shown in fig. 4, and is different from the second embodiment in that a radiator 1 and a radiator 11 are connected in series, so that when a return water electric three-way valve 44 closes the flow of the radiator 1, the temperature of water stored in the radiator 1 is lower, and the time required for the water to be close to or equal to the room temperature is shorter.
The fourth embodiment of the room temperature adjustment of the heating and air conditioning system is shown in fig. 5, the backwater electric valve 44 is a three-way valve, one water inlet of the backwater electric valve is connected with a backwater port of a group of radiators, the other water inlet is connected with one end of a bypass pipe 10, the water outlet is connected with a backwater pipeline 3, the other end of the bypass pipe 10 is connected with a water supply pipe 2 of the radiators, a backwater temperature sensor 5 is arranged on one side of the backwater pipeline 3 or the water outlet of the backwater electric three-way valve 44, the electric actuator can control the backwater electric three-way valve 44 to respectively realize full opening, full closing and one opening and one closing of two flow channels, during the period when the bypass pipe flow channel of the electric three-way valve 44 is closed and the radiator flow channel is opened, the stored water in the bypass pipe 10 stops flowing and gradually approaches or equals to the room temperature, the controller 6 averages the temperature of the water stored in the bypass pipe detected by the return water temperature sensor 5 and then takes the averaged temperature as an actual indoor temperature value or an average indoor temperature value, the controller 6 determines the opening and closing time or opening degree of a radiator flow channel of the electric three-way valve 44 according to the difference value between the temperature value and an indoor temperature set value inside the electric three-way valve, during the whole room temperature control period, the radiator 1 is always in a normal heating or refrigerating state, and the bypass pipe 10 is in a timing cycle temperature measurement state. The bypass pipe 10 should be positioned to sense the indoor temperature correctly, and the bypass pipe flow path of the electric three-way valve 44 should be small, so that even if the amount of water stored in the bypass pipe 10 is small, the time for the water to flow through the return water temperature sensor 5 can ensure that the correct indoor temperature is sensed. In the vertical series heating system, when the indoor temperature reaches a set value and the radiator flow passage of the electric three-way valve 44 is closed, the bypass pipe 10 bypasses the radiator 1 for the bypass flow, and the indoor temperature can be detected by using the water stored in the radiator 1. If the temperature measurement error caused by artificial interference temperature measurement or unreasonable corrected bypass pipe position is to be avoided, the bypass pipe 10 can be opened irregularly, the flow of the radiator 1 is closed, and the indoor temperature is detected by the water stored in the radiator 1, so that the artificial interference can be found or the temperature measurement error can be corrected.
The fifth embodiment of room temperature adjustment of heating and air conditioning system is shown in fig. 6, and is different from the fourth embodiment in that one end of the bypass pipe 10 is connected with one water inlet of the electric three-way valve 44, and the other end is connected with the water return port of the radiator 1, so that when the water return electric three-way valve 44 closes the flow passage of the bypass pipe 10, the temperature of the water stored in the bypass pipe 10 is lower, and the time required for the water stored in the bypass pipe 10 to be close to.
The second to fifth embodiments described above can adopt the same method as the first embodiment to establish a mathematical model of heat dissipation of the radiator and a mathematical model of heating or cooling of the room in order to better control the room temperature.
The method realizes accurate adjustment of the indoor temperature of the heating and air conditioning system without the indoor temperature sensor, and simultaneously can realize a temperature area charging method without the indoor temperature sensor. During the period of actively shutting off one of the flow channels of the electric valve 4 or the electric three-way valve 44, the stored water in the radiator 1 or the bypass pipe 10 stops flowing and gradually approaches or equals to the indoor temperature, when the electric valve is opened again, namely at the moment of te, the stored water approaching or equaling to the indoor temperature in the radiator 1 or the bypass pipe 10 flows through the return water temperature sensor 5, the average value of the stored water temperature detected by the return water temperature sensor 5 represents the average value Tr of the indoor temperature, or the indoor temperature is calculated by establishing a perfect mathematical model of radiator heat dissipation as described above, and according to the principle of 'same comfort degree, same payment', the controller 6 distributes the heating and air conditioning cost by recording the average value of the stored water temperature which cannot be intentionally interfered, deceived and falsified and can accurately represent the actual indoor temperature or the average value of the indoor temperature and according to the ratio of the room area to the total area, or directly calculating the cost of the heating air conditioner according to the unit price and the area of the indoor temperature, thereby realizing fair, reasonable, simple and credible charging.
The embodiment of the room temperature control valve without an indoor temperature sensor is shown in fig. 7, and the controller can be arranged in the actuator, namely the control actuator 8, the valve body 9 and the backwater temperature sensor 5 form the room temperature control valve. The control actuator 8 is internally preset with valve closing time for detecting the room temperature and can receive set value signals of the starting, the shutdown and the indoor temperature of the indoor operation panel, and the installation position of the indoor operation panel can not be limited by the distribution of the indoor temperature field and the decoration requirement because the indoor temperature sensor is not arranged in the indoor operation panel. The valve body 9 can be a two-way valve or a three-way valve, the valve body 9 has the capacity of fully opening the flow and fully closing the flow, that is, the temperature measuring flow channel of the valve body 9 should not leak when the flow is fully closed so as to avoid the situation that the room temperature cannot be accurately detected, if a temperature sensor is arranged in the control actuator 8, after the valve is fully closed for a long time, the temperature detected by the temperature sensor is equal to the temperature detected by the return water temperature sensor 5, otherwise, the valve body 9 can be judged to leak when the flow is fully closed. The valve body 9 can meet the requirement of maximum flow when fully opened, and simultaneously has good flow regulation performance so as to ensure that the valve body does not vibrate when controlling the return water temperature, the return water temperature set value is automatically generated in real time according to meteorological parameters, water supply temperature, indoor temperature set value and indoor temperature actual value and a dehumidification mathematical model established by combining the dehumidification force of the radiator, only the return water temperature is controlled, the water flow can be really supplied as required, and excessive dehumidification or insufficient dehumidification can be avoided when refrigerating in summer. The control actuator 8 can also output three speed signals of high, medium and low of the fan to control the fan coil according to the indoor temperature set value and the indoor temperature indirectly detected by the return water temperature sensor; in the heating charging system, the control actuator 8 can also output a closing signal of a water supply valve to realize arrearage shutdown. With the development of wireless technology, the control actuator 8 can realize wireless two-way transmission of signals such as startup, shutdown, indoor temperature set value and the like at low cost, an indoor operation panel can thoroughly get rid of the limitation of an installation position, can be randomly arranged in an effective distance of wireless communication, and can also replace the indoor operation panel with a mobile phone and a network to carry out remote or local management and control; the meteorological parameters, the water supply temperature, the water supply pressure and other parameters can be collected by the cloud equipment, and the cloud equipment analyzes and calculates and then sends the operating parameters such as the valve opening time and the return water temperature set value to the controller.
Claims (10)
1. A room temperature adjusting method of a heating air-conditioning system adjusts the room temperature by controlling an electric valve to change the water flow of a radiator, and is characterized in that: the method comprises the steps that a backwater temperature sensor is installed on a backwater pipeline or a backwater electric valve, during the turn-off period of the electric valve, the stored water in a radiator stops flowing and is gradually close to or equal to the indoor temperature, when the turn-off time of the electric valve is over and is reopened, the stored water close to or equal to the indoor temperature in the radiator flows through the backwater temperature sensor, a controller averages the temperature of the stored water in the radiator detected by the backwater temperature sensor and then takes the averaged temperature as the actual value or the average value of the indoor temperature, the controller determines the opening time of the electric valve according to the difference value between the temperature and the set value of the indoor temperature in the controller, during the turn-on period of the electric valve, the indoor temperature is gradually close to the set value of the indoor temperature, then the electric valve is turned off again, the stored water in the radiator is gradually close to or equal to The opening time of the electric valve is redetermined according to the difference value of the values and the opening time of the electric valve at the last time, the opening time of the electric valve is corrected until the valve is closed according to the difference value of the average value of the return water temperature at the last time during the opening period of the electric valve, the indoor temperature can be close to or equal to the indoor temperature set value after the circulation is continued, the indoor temperature set value can be preset before the controller leaves a factory and can also be sent to the controller in a wireless or wired mode, the closing time of the electric valve is determined according to the type and the heat dissipation condition of the radiator and the water storage quantity, the water stored in the radiator is ensured to be fully dissipated, and the electric valve is preset in the controller.
2. The room temperature adjusting method of a heating air-conditioning system according to claim 1, characterized in that: the controller respectively opens and closes the electric valve for two times or more than two times when the water supply temperature and the return water temperature are the same and the indoor temperature is not fluctuated greatly, the closing time of each time is different, according to the average value of the temperature of the water stored in the radiator detected by the return water temperature sensor, the controller can establish a simple heat dissipation mathematical model for the radiator through an artificial intelligence algorithm, and although the time for closing the electric valve each time is less than the time required by the water stored in the radiator to be close to or equal to the indoor temperature, the controller can calculate the indoor temperature by using the heat dissipation mathematical model of the radiator.
3. The room temperature adjusting method of a heating air-conditioning system according to claim 1, characterized in that: the controller respectively opens and closes the electric valve for multiple times of circulation when different water supply and return water temperatures and indoor temperatures exist, the closing time of each time is different, according to the average value of the temperature of the water in the radiator detected by the return water temperature sensor, the controller can establish a perfect heat dissipation mathematical model for the radiator through an artificial intelligence algorithm, and although the time for closing the electric valve each time is less than the time required by the water stored in the radiator to be close to or equal to the indoor temperature, the controller can calculate the indoor temperature by utilizing the heat dissipation mathematical model of the radiator.
4. The room temperature adjusting method of a heating air-conditioning system according to claim 1, characterized in that: the controller respectively opens and closes the electric valve for a plurality of times when different return water temperatures, indoor temperatures and indoor temperature set values exist, the opening time of each time is different, the average value of the temperature of the water in the radiator detected by the return water temperature sensor after the electric valve is closed and reopened is detected, the controller can establish a heating or refrigerating mathematical model for an adjusting object through an artificial intelligence algorithm, then the controller can determine the opening time of the electric valve each time according to the mathematical model, if the controller can also obtain real-time water supply temperature and real-time meteorological parameters through a wireless or wired mode, the electric valve is opened and closed for a plurality of times for circulation, the controller can establish a circuit containing the real-time meteorological parameters, the wired parameters and the real-time meteorological parameters for the controlling object through the artificial intelligence algorithm, The controller can accurately select the valve opening time of each time according to the mathematical model, thereby reducing the fluctuation range of the indoor temperature.
5. The room temperature adjusting method of a heating air-conditioning system according to claim 1, characterized in that: the controller is internally preset with a backwater temperature set value, or acquires parameters such as meteorological parameters, water supply temperature, indoor temperature, an indoor temperature set value, the opening degree of other electric valves in a wireless or wired mode, and automatically generates a backwater temperature set value capable of saving the energy consumption of the water pump to the maximum extent according to the indoor temperature and the indoor temperature set value, during the opening period of the electric valves, the controller adjusts the opening degree of the electric valves according to the difference value of the actual backwater temperature and the backwater temperature set value to enable the actual backwater temperature to be close to or equal to the backwater temperature set value so as to reduce the water flow, meet the water quantity requirements of other water-deficient users, realize dynamic hydraulic balance and reduce the power consumption of the water pump, during the summer refrigeration, the controller considers the various factors except for the factors when determining the backwater temperature set value, and a set value of return water temperature which can meet the cooling requirement, ensure the dehumidification capacity and save the energy consumption of the water pump to the maximum extent is determined according to the dehumidification capacity of the radiator.
6. A room temperature adjusting method of a heating air-conditioning system adjusts the room temperature by controlling an electric valve to change the water flow of a radiator, and is characterized in that: the electric valve is a three-way valve, two water inlets of the three-way valve are respectively connected with water return ports of two groups of radiators, a water outlet of the three-way valve is connected with a water return pipeline, a water return temperature sensor is arranged on the water return pipeline or the water outlet of the water return electric three-way valve, the electric actuator can control the three-way valve to respectively realize full opening, full closing and one opening and one closing of two flow channels, during the period that one flow channel of the electric valve is closed and the other flow channel is opened, water stored in one group of radiators stops flowing and is gradually close to or equal to the indoor temperature, when the flow channel of the electric three-way valve is closed and is opened again after the closing time is over, the water stored in the radiators close to or equal to the indoor temperature flows through the water return temperature sensor, the controller averages the temperature of the water stored in the radiators detected by the water, and the previous actual value of the indoor temperature and the time for opening the flow channels of the two groups of radiators of the electric three-way valve respectively are determined, the time for opening the flow channels of the two groups of radiators of the electric three-way valve respectively is determined, during the whole room temperature control period, one group of radiators are in a normal heating or cooling state, the other group of radiators are in a state of alternately performing heating and cooling and temperature measurement or are completely in a circulating temperature measurement state, the indoor temperature gradually approaches and reaches a set value of the indoor temperature until the two flow channels of the electric valve are both closed, the temperature measurement times are increased as much as possible by using an artificial intelligence algorithm on the premise of meeting the indoor temperature, the fluctuation of the room temperature is reduced, and the temperature difference of supply water and return water is improved by controlling the opening degree of.
7. A room temperature adjusting method of a heating air-conditioning system adjusts the room temperature by controlling an electric valve to change the water flow of a radiator, and is characterized in that: the electric valve is a three-way valve, two water inlets of the three-way valve are respectively connected with a group of radiators and a water return port of a bypass pipe, a water outlet of the three-way valve is connected with a return water pipeline, a return water temperature sensor is arranged on the water outlet of the return water pipeline or the return water electric three-way valve, the electric actuator can control the three-way valve to respectively realize full opening, full closing and one opening and one closing of two flow passages, during the time of regularly closing the flow passage of the electric three-way valve bypass pipe, the stored water in the bypass pipe stops flowing and is gradually close to or equal to the indoor temperature, when the flow passage of the electric three-way valve is closed again after the closing time is over, the stored water close to or equal to the indoor temperature in the bypass pipe flows through the return water temperature sensor, the controller averages the temperature of the stored water in the bypass pipe detected, the opening time or the opening degree of a flow passage of the electric three-way valve radiator is determined, the radiator is in a normal heating or refrigerating state during the whole room temperature control period, the bypass pipe is only used for temperature measurement and bypass flow of the bypass pipe crossing the radiator, in a vertical series heating system, the bypass pipe crosses the bypass flow of the radiator, on the premise of meeting the indoor temperature, the temperature measurement times are increased as much as possible, and the room temperature fluctuation is reduced.
8. A charging method for heating air-conditioning system adjusts the room temperature by controlling the electric valve to change the water flow of the radiator, and charges according to the room temperature, which is characterized in that: the method is characterized in that a backwater temperature sensor is installed on a backwater pipeline or a backwater electric valve, during the turn-off period of the electric valve, the stored water in the radiator stops flowing and is gradually close to or equal to the indoor temperature, when the electric valve is opened again, the stored water close to or equal to the indoor temperature in the radiator flows through the backwater temperature sensor, the backwater temperature sensor detects the temperature of the stored water in the radiator and takes the temperature as the indoor temperature after averaging, and then the heating and air-conditioning cost is shared according to the ratio of the room area to the total area and the total energy consumption, or the heating and air-conditioning cost is directly calculated according to.
9. A charging method for heating air-conditioning system adjusts the room temperature by controlling the electric valve to change the water flow of the radiator, and charges according to the room temperature, which is characterized in that: the water return pipe or the water return electric three-way valve is provided with a water return temperature sensor, during the period that one runner of the electric three-way valve is closed, the stored water in a group of radiators or by-pass pipes stops flowing and is gradually close to or equal to the indoor temperature, when the runner is opened again, the stored water close to or equal to the indoor temperature in the group of radiators or by-pass pipes flows through the water return temperature sensor, the water return temperature sensor detects the temperature of the stored water in the group of radiators or by-pass pipes and averages the temperature to be used as the indoor temperature, and then the heating and air conditioning cost is divided according to the ratio of the room area to the total area of the building and the total energy consumption of the building, or the heating and air conditioning.
10. The utility model provides a room temperature control valve comprises electric actuator and valve body, its characterized in that: the controller can receive signals of set values of starting, shutdown and indoor temperature, and can output signals of three speeds, namely high speed, medium speed and low speed, of the fan according to the set values of the indoor temperature and the average temperature of water stored in the radiator detected by the return water temperature sensor.
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