Intelligent control kit for fan coil

Abstract

The invention relates to a fan coil intelligent control suite which comprises a two-way valve, an intelligent control terminal and a valve assembly, the two-way valve is connected with a pipeline of a fan coil, the flow of a cooling medium and a heating medium of a fan coil system is adjusted by controlling the opening degree of the two-way valve, and the intelligent control terminal is in signal connection with a temperature sensor and a humidity sensor. The intelligent control terminal is used for monitoring the temperature of refrigerants entering and exiting the fan coil and the indoor temperature and automatically adjusting the opening degree of the two-way valve, and the valve combination body is used for controlling circulation of refrigerants in different areas in the fan coil system. Meanwhile, the arranged valve combination body can be flexibly configured according to actual requirements, the control requirements of different areas and different temperature requirements are met, and the intelligent control terminal can control operation of the fan coil system anytime and anywhere through a mobile phone, a tablet computer and other intelligent devices.

Description

Technical Field

[0001] This invention relates to the field of heating, ventilation and air conditioning, specifically to a fan coil unit intelligent control kit. Background Technology

[0002] With the development of technology, intelligent and automated control technologies have been widely used in the field of HVAC. Although traditional fan coil systems can meet basic temperature regulation needs, there is still room for improvement in energy saving, comfort and intelligent control. With the improvement of building energy efficiency standards and the increase in users' requirements for comfort, the demand for system intelligence and energy efficiency optimization is becoming increasingly urgent.

[0003] Therefore, developing an intelligent control kit for fan coil units that integrates two-way valves, intelligent control software, and valve assemblies has significant practical implications and broad market prospects. This kit can not only achieve precise temperature control and air quality management, but also optimize energy consumption through real-time data analysis, thereby achieving energy conservation and emission reduction goals. Furthermore, intelligent remote monitoring and fault diagnosis functions greatly improve system operational stability and maintenance efficiency, while reducing operating and management costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a fan coil intelligent control kit to solve the technical problem that, although the current traditional fan coil system can meet the basic temperature regulation requirements, there is still room for improvement in energy saving, comfort and intelligent control. With the improvement of building energy efficiency standards and the increase in users' requirements for comfort, the demand for system intelligence and energy efficiency optimization is becoming increasingly urgent.

[0005] To achieve the objectives of this invention, the technical solution adopted is as follows: A fan coil unit intelligent control kit is designed, comprising a two-way valve, an intelligent control terminal, and a valve assembly. The two-way valve is connected to the fan coil unit's piping. By controlling the opening degree of the two-way valve, the flow rate of the refrigerant in the fan coil unit system is adjusted. The intelligent control terminal is connected to temperature and humidity sensors to monitor the refrigerant temperature entering and exiting the fan coil unit and the indoor temperature, automatically adjusting the opening degree of the two-way valve. The valve assembly is used to control the flow of refrigerant in different areas of the fan coil unit system.

[0006] Preferably, the heating or cooling medium is one of hot or cold water, refrigerant, ethylene glycol solution, and antifreeze heat exchange medium.

[0007] Preferably, the valve assembly includes one or more valves to meet the control requirements of different areas and different temperatures.

[0008] Preferably, the intelligent control terminal uses the following formula to determine the refrigerant flow rate at the control kit. This controls the valve opening degree, as shown in the following formula:

[0009] + Q1

[0010]

[0011]

[0012] In the formula:

[0013] Q represents heat, which needs to be calculated;

[0014] cw is the specific heat capacity of the refrigerant, which can be found.

[0015] mw represents the refrigerant flow rate, which needs to be calculated.

[0016] The temperature of the refrigerant as it flows out of the fan coil unit is measured by a temperature sensor.

[0017] The temperature of the fluid flowing into the fan coil unit is measured by a temperature sensor.

[0018] Q1 is the latent heat of vaporization per unit mass of refrigerant (this item is zero when the working fluid does not change phase).

[0019] The specific heat capacity of indoor air can be found;

[0020] The air volume of the fan coil unit is provided by the manufacturer.

[0021] The indoor air temperature is measured by a temperature sensor.

[0022] The air temperature after being processed by the fan coil unit, i.e. the air temperature at the outlet of the fan coil unit, needs to be calculated;

[0023] K is the heat transfer coefficient of the fan coil unit, provided by the manufacturer;

[0024] A represents the heat exchange area of ​​the fan coil unit, provided by the manufacturer.

[0025] Preferably, the temperature sensor is installed at the inlet and outlet of the fan coil unit and indoors to monitor the refrigerant temperature entering and exiting the fan coil unit, the indoor temperature, and automatically adjust the opening of the two-way valve.

[0026] Preferably, the humidity sensor is installed indoors for monitoring indoor humidity.

[0027] Preferably, the intelligent control terminal is connected to an intelligent device for remote control and timed switching.

[0028] Preferably, the smart device includes the user's mobile phone and tablet.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. This invention combines a two-way valve, an intelligent control terminal, and a valve assembly to utilize a calculation control kit to control the refrigerant flow rate. It enables precise adjustment of valve opening. At the same time, the valve assembly can be flexibly configured according to actual needs to meet the control requirements of different areas and different temperatures. The intelligent control terminal supports remote control function, and users can control the operation of the fan coil system anytime and anywhere through smart devices such as mobile phones and tablets. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall invention. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0033] Fan coil unit intelligent control kit, see Figure 1 It includes a two-way valve, an intelligent control terminal, and a valve assembly. The two-way valve is connected to the piping of the fan coil unit. By controlling the opening of the two-way valve, the flow rate of the cold and hot media in the fan coil unit system can be regulated. The intelligent control terminal is connected to temperature and humidity sensors to monitor the temperature of the cold and hot media entering and leaving the fan coil unit and the indoor temperature, and automatically adjusts the opening of the two-way valve. The valve assembly is used to control the flow of cold and hot media in different areas of the fan coil unit system.

[0034] For details, see Figure 1 The heating or cooling medium can be one of the following: hot or cold water, refrigerant, ethylene glycol solution, or antifreeze heat exchange medium.

[0035] For more details, see Figure 1 The valve assembly includes one or more valves to meet the control requirements of different areas and different temperatures.

[0036] Further, see Figure 1 The intelligent control terminal uses the following formula to determine the refrigerant flow rate at the control kit. This controls the valve opening degree, as shown in the following formula:

[0037] + Q1

[0038]

[0039]

[0040] In the formula:

[0041] Q represents heat, which needs to be calculated;

[0042] cw is the specific heat capacity of the refrigerant, which can be found.

[0043] mw represents the refrigerant flow rate, which needs to be calculated.

[0044] The temperature of the refrigerant as it flows out of the fan coil unit is measured by a temperature sensor.

[0045] The temperature of the fluid flowing into the fan coil unit is measured by a temperature sensor.

[0046] Q1 is the latent heat of vaporization per unit mass of refrigerant (this item is zero when the working fluid does not change phase).

[0047] The specific heat capacity of indoor air can be found;

[0048] The air volume of the fan coil unit is provided by the manufacturer.

[0049] The indoor air temperature is measured by a temperature sensor.

[0050] The air temperature after being processed by the fan coil unit, i.e. the air temperature at the outlet of the fan coil unit, needs to be calculated;

[0051] K is the heat transfer coefficient of the fan coil unit, provided by the manufacturer;

[0052] A represents the heat exchange area of ​​the fan coil unit, provided by the manufacturer.

[0053] When using the fan coil unit intelligent control kit, first write the parameters into the intelligent control software of the intelligent control terminal. As seen from the above equations, only Q... , The unknown, a system of three equations, three unknowns, can be solved. The value of is used to control the valve opening, thus ensuring the refrigerant flow rate is . In the temperature sensor measurement , , , The data is transmitted back to the intelligent control software, which then transmits the measurements from the flow sensor. The data is transmitted back to the intelligent control software, where it is calculated and controlled using the aforementioned set of equations.

[0054] If room temperature The change will be reflected in the intelligent control software solution program of the intelligent control terminal, which will measure... Decrease by (4 × 1.5)℃ and substitute it into the solver. The variable to be solved is now Q. ,by As a standard, the valve opening is controlled based on the temperature measured by the sensor. When the temperature is changed, the intelligent control software will use For the changed temperature, measured at this moment Recalculate the refrigerant flow rate using the parameters. The valve opening should be controlled based on the newly calculated water flow rate.

[0055] Without adjusting other parameters, the refrigerant flow rate is calculated based on data transmitted back from the sensor every minute. This is used to control the valve opening.

[0056] It is worth noting that, see Figure 1 Temperature sensors are installed at the inlet and outlet of the fan coil unit and indoors to monitor the refrigerant temperature entering and exiting the fan coil unit, the indoor temperature, and automatically adjust the opening of the two-way valve.

[0057] It is worth noting that, see Figure 1 The humidity sensor is installed indoors to monitor indoor humidity.

[0058] It is worth mentioning that, see Figure 1 The intelligent control terminal connects to intelligent devices for remote control and timed on / off switching. Intelligent devices include users' mobile phones and tablets.

[0059] Example 1

[0060] Taking water-based fan coil units as an example

[0061] Specific heat capacity of water The water supply temperature is 4200 J / (kg∙℃). The return water temperature is 7℃. 12℃; specific heat capacity of air The room temperature is set at 1004 J / (kg∙℃). The temperature is 24℃. K and A are provided by the manufacturer. To determine the air volume supplied by the fan coil unit, the above parameters are written into the intelligent control software. As seen in the following set of equations, only Q... , The unknown, a system of three equations, three unknowns, can be solved. The value of is used to control the valve opening, thus ensuring the cold water flow rate is . In measuring the temperature by the sensor , , , The data is transmitted back to the intelligent control software, which then transmits the measurements from the flow sensor. The data is transmitted back to the intelligent control software, where it is calculated and controlled using the following set of equations.

[0062] If room temperature If the temperature is changed from 24℃ to 20℃, the measured temperature will be changed in the solution program of the intelligent control software. Decrease by (4 × 1.5)℃ (i.e., 6℃), and substitute this into the solver. The variable to be solved is now Q. ,by As a standard, the valve opening is controlled based on the temperature measured by the sensor. At 20℃, the intelligent control software will use The measurement was taken at 20℃ at this moment. Recalculate the cold water flow rate using the parameters. The valve opening is controlled based on the newly calculated water flow rate.

[0063] Without adjusting other parameters, the cold water flow rate is calculated based on data transmitted back from the sensor every minute. This is used to control the valve opening.

[0064]

[0065]

[0066]

[0067] In the formula:

[0068] Q represents heat, which needs to be calculated;

[0069] cw is the specific heat capacity of water, which can be found online;

[0070] mw is the water flow rate, which needs to be calculated;

[0071] The temperature of the water flowing out of the fan coil unit is measured by a temperature sensor.

[0072] The temperature of the fluid flowing into the fan coil unit is measured by a temperature sensor.

[0073] The specific heat capacity of indoor air can be found;

[0074] The air volume of the fan coil unit is provided by the manufacturer.

[0075] The indoor air temperature is measured by a temperature sensor.

[0076] The air temperature after being processed by the fan coil unit, i.e. the air temperature at the outlet of the fan coil unit, needs to be calculated;

[0077] K is the heat transfer coefficient of the fan coil unit, provided by the manufacturer;

[0078] A represents the heat exchange area of ​​the fan coil unit, provided by the manufacturer.

[0079] Example 2

[0080] Taking fan coil units with refrigerant as the working fluid as an example

[0081] The specific heat capacity and latent heat of vaporization of the refrigerant can be obtained from its physical properties. The refrigerant supply temperature is 7℃, and the return water temperature is 12℃. The specific heat capacity of air is 1004 J / (kg∙℃). The room temperature is set to 24℃. K and A are provided by the manufacturer and represent the air volume delivered by the fan coil unit. These parameters are written into the intelligent control software. As seen in the equations described below, only Q... , The problem involves three equations with three unknowns. The solution yields a value that controls the valve opening, ensuring a specific cold water flow rate. The temperature sensor's measurements (temperature, flow rate, and velocity) are transmitted back to the intelligent control software, and the flow rate sensor's measurements are also transmitted back to the software. The following equations are then used to calculate and control the flow.

[0082] If the room temperature is changed from 24℃ to 20℃, the measured decrease of (4×1.5)℃ (i.e., 6℃) will be substituted into the solution program of the intelligent control software. At this time, the variables to be solved are Q and , which are used as the standard to control the valve opening. When the temperature sensor measures 20℃, the intelligent control software will take 20℃ and the measured value at this moment as the parameter, recalculate the cold water flow rate, and use the newly calculated water flow rate as the standard to control the valve opening.

[0083] Without adjusting other parameters, the cold water flow rate is calculated based on data transmitted back from the sensor every minute, which is used to control the valve opening.

[0084] + Q1

[0085]

[0086]

[0087] In the formula:

[0088] Q represents heat, which needs to be calculated;

[0089] cw is the specific heat capacity of the refrigerant, which can be found online;

[0090] mw is the refrigerant flow rate, which needs to be calculated;

[0091] The temperature of the refrigerant as it flows out of the fan coil unit is measured by a temperature sensor.

[0092] The temperature of the fluid flowing into the fan coil unit is measured by a temperature sensor.

[0093] Q1 is the latent heat of vaporization of refrigerant per unit mass, which can be found;

[0094] The specific heat capacity of indoor air can be found;

[0095] The air volume of the fan coil unit is provided by the manufacturer.

[0096] The indoor air temperature is measured by a temperature sensor.

[0097] The air temperature after being processed by the fan coil unit, i.e. the air temperature at the outlet of the fan coil unit, needs to be calculated;

[0098] K is the heat transfer coefficient of the fan coil unit, provided by the manufacturer;

[0099] A represents the heat exchange area of ​​the fan coil unit, provided by the manufacturer.

[0100] In conclusion, as market demand for intelligent building solutions increases, the fan coil unit intelligent control kit of this invention can not only play an important role in large buildings such as commercial office buildings, hotels and medical facilities, but also meet the pursuit of energy conservation, environmental protection and comfort in small and medium-sized commercial and residential buildings. Its application will further promote the development of the HVAC industry towards intelligence and high efficiency, and provide users with a better indoor environment and user experience.

[0101] In addition, all components designed in this invention are general standard parts or components known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this invention does not involve improvements to the internal structure and method.

Claims

1. A fan coil intelligent control kit, comprising a two-way valve, an intelligent control terminal and a valve assembly, characterized in that, The two-way valve is connected with the pipeline of the fan coil, and the opening of the two-way valve is controlled to realize the regulation of the cold and hot medium flow of the fan coil system. The intelligent control terminal is connected with the temperature sensor and the humidity sensor signal, and is used for monitoring the inlet and outlet medium temperature of the fan coil, the indoor temperature, and automatically adjusting the opening of the two-way valve. The valve combination is used for controlling the circulation of the cold and hot medium in different areas of the fan coil system.

2. The unitary fan coil intelligence control package of claim 1, wherein, The cold and hot medium is one of cold and hot water, refrigerant, glycol solution and anti-freezing heat exchange medium.

3. The unitary fan coil intelligence control package of claim 1, wherein, The valve combination includes one or more valves, which are used for meeting the control requirements of different areas and different temperature requirements.

4. The unitary smart control package for a fan coil as set forth in claim 1, wherein, The intelligent control terminal determines the flow rate of the refrigerant at the control package by using the following relationship and controls the opening degree of the valve by using the following relationship + Q1 In the formula, Q is heat, which needs to be calculated; Cw is the specific heat capacity of the medium, which can be obtained by searching; Mw is the flow of the medium, which needs to be calculated; the temperature of the refrigerant flow out of the fan coil is measured by a temperature sensor; temperature for the flow into the fan coil is measured by a temperature sensor; Q1 is the latent heat of vaporization per unit mass of the medium, which is zero when the working medium does not change; The specific heat capacity of the indoor air can be found in tables. The air volume of the fan coil is provided by the manufacturer. For the room air temperature, measured by a temperature sensor; The air temperature after the fan-coil treatment, i.e. the air temperature at the fan-coil outlet, has to be calculated; K is the heat exchange coefficient of the fan coil, which is provided by the manufacturer; A is the heat exchange area of the fan coil, which is provided by the manufacturer.

5. The unitary smart control package for a fan coil as set forth in claim 1, wherein, The temperature sensor is installed at the inlet and outlet of the fan coil and in the room, and is used for monitoring the inlet and outlet medium temperature of the fan coil, the indoor temperature, and automatically adjusting the opening of the two-way valve.

6. The unitary smart control package for a fan coil as set forth in claim 1, wherein, The humidity sensor is installed in the room, and is used for monitoring the humidity in the room.

7. The unitary smart control package for a fan coil as set forth in claim 1, wherein, The intelligent control terminal is connected with the intelligent device, and is used for remote control and timing switch.

8. The smart control package for a fan coil unit of claim 6, wherein, The intelligent device includes the user's mobile phone and tablet computer.

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