Energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling

Abstract

The present invention relates to the technical field of intermittent heating and cooling, and in particular to an energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling, the system comprising: a planning unit for forming a corresponding guidance model; an installation unit for forming a corresponding operating room; a sensing unit for detecting a flowing heat source; a comparison unit for updating a three-dimensional model as a new guidance model; and a control unit for switching different operating conditions of a convection terminal device and a radiation terminal device according to the number of people in each area of ​​the operating room and the number of heating devices in each area of ​​the operating room; the system of the present invention utilizes the method of setting up the above-mentioned devices to have different heat exchange effects of a convection terminal and a radiation terminal, thereby extending the use chain of each energy source, playing a role in energy conservation and emission reduction, and effectively improving the accuracy of the energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling.

Description

Technical Field

[0001] The present invention relates to the technical field of intermittent heating and cooling, and in particular to an energy cascade convection-radiation coupling terminal system based on intermittent heating and cooling. Background Art

[0002] Today's office buildings and rural buildings are often operated with limited occupancy, making them suitable for intermittent heating or cooling, which reduces energy waste. Intermittent heating and cooling often utilizes convection terminals, such as air conditioners and fan coil units, and radiant terminals, such as radiators and radiant panels, as the primary heating terminals for regulating indoor temperature. Intermittent heating and cooling requires rapid heating or cooling to maintain indoor thermal comfort. When convection terminals operate alone, while indoor temperatures rise or fall rapidly, the strong forced convection creates uneven temperature distribution, leading to poor thermal comfort. Furthermore, due to the poor thermal inertia of convection terminals, when they cease operation, indoor temperatures drop or rise rapidly, resulting in a lower or higher initial temperature upon reheating. When radiant terminals operate alone, while indoor thermal comfort improves, heating or cooling is slow, failing to meet the rapid heating or cooling requirements of intermittent heating or cooling. Therefore, coupling the convection terminal with the radiation terminal to form a convection-radiation coupled terminal can combine the advantages of rapid heating or cooling of convection and radiation with the better thermal comfort of the radiation terminal. Therefore, it is necessary to develop a convection-radiation coupled terminal system that utilizes cascaded energy utilization and is suitable for intermittent heating or cooling with switchable modes.

[0003] Chinese Patent Authorization Announcement No.: CN114396674B discloses a convection and radiation dual-effect zoned temperature control desk. The invention discloses a convection or radiation dual-effect zoned temperature control desk, with a slit-shaped louver air outlet set above the desk and an arc-shaped electric heating type radiation plate set below; the slit-shaped louver air outlet faces the breathing area of ​​the office worker, the slit-shaped louver air outlet is directly connected to the fresh air duct, the axial direction of the arc-shaped electric heating type radiation plate is vertical, and its inner arc surface faces the leg area of ​​the office worker; the arc-shaped electric heating type radiation plate is arranged by a rotating hinge mechanism so that it can rotate to adjust the direction of its inner arc surface. The invention has the function of convection fresh air supply on the desk and radiation heating under the desk, and can perform segmented temperature control on the upper and lower areas of the desk. In the winter heating state, fresh air is provided to the human breathing area through the louver air outlet, which helps to protect human health and improve work efficiency. The arc-shaped electric heating radiation panel heats the human legs, which meets the human comfort requirement of "warm feet and cool head" in winter, and is more energy-efficient than indiscriminate heating of the entire space.

[0004] Chinese patent application publication number: CN108562032A discloses a unified terminal for coupled radiation and convection heat exchange. The invention specifically relates to a unified terminal for coupled radiation and convection heat exchange, comprising a terminal body, a radiation heat exchange component, a convection heat exchange component, and a water supply and return component. The radiation heat exchange component is disposed on the outer side of the terminal body and comprises a radiation heat exchange plate. The radiation heat exchange plate has a cavity provided therein for the flow of heat exchange medium. The cavity within the radiation heat exchange component is connected to the water supply and return component. The convection heat exchange component is disposed within the terminal body and comprises a convection heat exchange tube and fins. The two ends of the convection heat exchange tube are respectively connected to the cavity and the water supply and return component. A fan is provided within the terminal body. The beneficial effects of the invention are: the unified terminal has a simple structure, is compact as a whole, occupies little space, and has high heat exchange efficiency. It fully utilizes the complementary advantages of convection and radiation heat exchange modes and can flexibly meet different indoor comfort requirements.

[0005] However, the above method has the following problems: it cannot effectively provide targeted heating or cooling based on the air flow conditions and the people and equipment in the room, and it cannot provide heating or cooling based on the temperature requirements of different areas in the room. Summary of the Invention

[0006] To this end, the present invention provides an energy-grade convection-radiation coupled terminal system based on intermittent heating and cooling, which is used to overcome the problems in the prior art that it is impossible to effectively provide targeted heating or cooling according to the air flow conditions and the people and equipment in the room, and it is impossible to provide heating or cooling according to the temperature requirements of different areas in the room.

[0007] To achieve the above objectives, the present invention provides an energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling, comprising:

[0008] a planning unit, configured to determine an initial air flow condition in the initial room according to the three-dimensional model of the initial room and the physical characteristics of the initial room, and to form a corresponding guidance model;

[0009] an installation unit connected to the planning unit, configured to place convection terminal devices and radiation terminal devices in response to the guidance model and form corresponding operation rooms;

[0010] a sensing unit connected to the mounting unit, configured to detect the operating air flow in the operating room and detect the flow heat source, including detecting the number of heat-generating devices in each area of ​​the operating room and the number of people in each area of ​​the operating room;

[0011] a comparison unit, connected to the planning unit and the sensing unit, respectively, for comparing the air flow conditions of the initial room with the air flow conditions of the operating room, determining whether the total heating or cooling supply of the heat source or the cooling source meets the standard based on the comparison result, and updating the three-dimensional model as a new guidance model;

[0012] A control unit, which is respectively connected to the sensing unit and the comparison unit, is used to divide the types of different areas in the operating room according to the air flow conditions and the temperature requirements of different areas in the operating room, and switch the different operating conditions of the convection terminal device and the radiation terminal device according to the number of people in each area of ​​the operating room and the number of heating devices in each area of ​​the operating room, including:

[0013] When it is determined that the total heating supply or the total cooling supply of the heat source or the cooling source does not meet the standard, turning on the electric heating auxiliary device or the cooling auxiliary device of the water source heat pump;

[0014] Switching between different operating conditions of the convection terminal device and the radiation terminal device at different time periods;

[0015] The various operating devices are operated in series under the different operating conditions;

[0016] The physical characteristics include room dimensions, door and window locations, and external heat source distribution;

[0017] Air flow conditions include air flow velocity, air flow direction and temperature distribution;

[0018] The fluid heat source is composed of the number of the heat generating devices and the number of people. The heat generating devices are devices that release heat to the surrounding environment during their own operation.

[0019] Furthermore, it also includes:

[0020] The convection terminal device includes a fan coil unit, which is connected to the control unit and is used for convection heat exchange with the air in the operating room;

[0021] The radiation terminal device includes a radiator and a wall radiation panel, which are respectively connected to the control unit and the convection terminal device to perform radiation heat exchange with the air in the operating room.

[0022] Furthermore, the planning unit determines the initial air flow condition in the initial room according to the three-dimensional model of the initial room and the physical properties of the initial room, wherein:

[0023] setting the physical properties of the initial room into the three-dimensional model,

[0024] Divide the three-dimensional model into grids according to the air flow velocity,

[0025] The air flow conditions in each grid are calculated and an air streamline diagram is drawn.

[0026] Furthermore, the installation unit places the convection terminal device and the radiation terminal device in response to the guidance model, wherein:

[0027] The wall radiation panel is placed on the wall on the side where the external heat source is not distributed;

[0028] The radiator is placed at the door and window position;

[0029] placing the fan coil unit according to the room size;

[0030] The external heat source is a heat source outside the initial room that can generate heat and affect the internal thermal environment of the initial room.

[0031] Furthermore, the control unit divides the types of different areas in the operating room according to the air flow conditions and the temperature requirements of different areas in the operating room, wherein:

[0032] If the average air flow rate in the area is greater than or equal to the preset flow rate value and the temperature requirement range difference in the area is less than the preset temperature difference, the control unit classifies the area as a temperature sensitive area;

[0033] If the average air flow rate in the area is greater than or equal to the preset flow rate value and the temperature requirement range difference in the area is greater than or equal to the preset temperature difference, the control unit divides the area into a temperature tolerance zone;

[0034] If the average air flow rate in the area is less than the preset flow rate value and the temperature requirement range difference in the area is less than the preset temperature difference, the control unit divides the area into a special temperature requirement area;

[0035] If the average air flow rate in the area is less than the preset flow rate value and the temperature requirement range difference in the area is greater than or equal to the preset temperature difference value, the control unit divides the area into a constant temperature area;

[0036] The preset flow rate value is related to the physical characteristics of the room, and the preset temperature difference value is related to the purpose of different areas of the room.

[0037] Furthermore, the control unit calculates the energy supply parameters of each area in the operating room according to the number of people in each area in the operating room and the number of heating devices in each area in the operating room.

[0038] Furthermore, the control unit, when dividing a single area in the operating room as the temperature sensitive area, compares the energy supply parameters of the area with the preset energy supply parameters, and switches the different operating conditions of the convection terminal device and the radiation terminal device in the area according to the comparison result, wherein,

[0039] If the energy supply parameter is less than the preset energy supply parameter, the radiator is operated in a separate operation mode;

[0040] If the energy supply parameter is greater than or equal to the preset energy supply parameter, the full equipment operation condition is run;

[0041] The preset energy supply parameters are positively correlated with the area of ​​the operating room. The operating conditions include the fan coil unit's separate operating condition, the radiator's separate operating condition, the wall radiation panel's separate operating condition, the radiator and fan coil unit's coupled operating condition, the fan coil unit's and wall radiation panel's coupled operating condition, the radiator and wall radiation panel's coupled operating condition, and the full-equipment operating condition. The full-equipment operating condition is the radiator, fan coil unit, and wall radiation panel's coupled operating condition.

[0042] Furthermore, the control unit, when dividing a single area in the operating room into the temperature tolerance zone, compares the energy supply parameters of the area with the preset energy supply parameters, and switches the different operating conditions of the convection terminal device and the radiation terminal device in the area according to the comparison result, wherein,

[0043] If the energy supply parameter is less than the preset energy supply parameter, the wall radiation panel is operated in a separate operation mode;

[0044] If the energy supply parameter is greater than or equal to the preset energy supply parameter, the radiator and fan coil coupling operation condition is operated.

[0045] Furthermore, the control unit, when dividing a single area in the operating room into the special temperature demand area, compares the energy supply parameters of the area with the preset energy supply parameters, and switches the different operating conditions of the convection terminal device and the radiation terminal device in the area according to the comparison result, wherein,

[0046] If the energy supply parameter is less than the preset energy supply parameter, the fan coil unit is operated in a separate operation mode;

[0047] If the energy supply parameter is greater than or equal to the preset energy supply parameter, the fan coil unit and the wall radiation panel are operated in a coupled operating condition.

[0048] Furthermore, the control unit operates the radiator and the wall radiation panel in a coupled operating condition when a single area in the operating room is divided into the constant temperature zone.

[0049] Compared with the prior art, the beneficial effect of the present invention lies in that the system of the present invention simulates the air flow in the room by setting up a three-dimensional model in combination with the physical characteristics of the room. By simulating the interaction between air flow and temperature field, it can predict the temperature distribution in different areas of the room, and then adjust the ventilation and air-conditioning system to avoid local overheating or overcooling areas, create a more comfortable thermal environment for people, and improve the thermal comfort of indoor personnel. Then, the equipment is placed according to the air flow conditions. When the air-conditioning equipment is placed according to the air flow direction and characteristics in the room, the hot and cold air blown out by the air-conditioning equipment can be more evenly diffused in the room with the help of natural air flow. By accurately grasping the air flow laws to place the air-conditioning equipment, it can be avoided that the air-conditioning equipment cannot effectively diffuse, resulting in long-term high-power operation of the air-conditioning equipment. After reasonable placement, the hot and cold air are evenly distributed, and only relatively little energy is needed to maintain a stable and comfortable indoor temperature, which plays a role in energy saving and emission reduction, and effectively improves the accuracy and practicality of the energy cascade convection-radiation coupling terminal system based on intermittent heating and cooling.

[0050] Furthermore, the system of the present invention forms a convection-radiation coupled terminal system by combining radiators, fan coil units and wall radiation panels in series, which can have both the rapid heating or cooling effect of the convection terminal and the good comfort and large thermal inertia effect of the radiation terminal, and can switch the heating or cooling conditions at will to meet the requirements of intermittent heating or cooling in various scenarios. In addition, the system uses the energy cascade utilization theory to improve energy utilization and is applicable to more types of energy. The energy cascade utilization fully reflects the cherishment and efficient use of limited energy resources, and reduces energy waste by extending the use chain of each energy as much as possible, thereby further improving the accuracy and practicality of the energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling.

[0051] Furthermore, the present invention divides the types of different areas in the operating room according to the air flow conditions and the temperature requirements of different areas in the operating room. Through such division, the specific temperature requirement characteristics of each area can be clearly known, and targeted temperature adjustment measures can be taken. For example, in a large office space, the area near the window is affected by sunlight and the temperature requirement may be relatively low, while the middle part of the room is where more people gather and the temperature requirement is moderate. After these areas are classified separately, the air volume, wind speed and temperature settings of the air-conditioning outlets in different areas can be adjusted to accurately meet the desired temperature conditions of each area, avoid overcooling or overheating in some areas, and improve the overall thermal comfort of indoor people. At the same time, the areas are divided and regulated according to actual temperature requirements, avoiding excessive cooling or heating of the entire room to meet the special temperature requirements of individual areas, reducing unnecessary energy consumption, and further improving the accuracy and practicality of the energy ladder convection-radiation coupling terminal system based on intermittent heating and cooling.

[0052] Furthermore, the present invention adjusts the equipment operating conditions in different areas according to the personnel situation and the conditions of the heating equipment in each area of ​​the room. The number of people in different areas is different, and the heat dissipation conditions of human bodies are also different. At the same time, the presence of heating equipment will additionally increase heat dissipation. By adjusting the air-conditioning operating conditions in a targeted manner, such as appropriately increasing the cooling capacity in areas with dense population, it is ensured that the ambient temperature of the personnel is suitable and the feeling of stuffiness caused by too many people is avoided; and for areas with heating equipment, the cooling power of the air-conditioning is reasonably adjusted according to the heat output of the equipment, so that the temperature of the area is maintained in an appropriate range, making the personnel in it feel comfortable, and effectively improving the temperature of the entire room. The thermal comfort of people in different areas of the room can be adjusted according to actual conditions, so that the temperature of each area can be balanced, and there will be no excessive difference in local temperature, creating a more comfortable and pleasant indoor environment. The air conditioner is controlled according to the actual heat generation of each area, which can avoid excessive cooling or heating of the entire room. For areas with a small amount of heating equipment and sparse personnel, there is no need for high-intensity cooling like areas with dense personnel and no heating equipment, thereby accurately controlling the energy consumption of the air conditioner, reducing unnecessary energy consumption, and further improving the accuracy and practicality of the energy cascade convection-radiation coupling terminal system based on intermittent heating and cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a schematic structural diagram of the energy cascade convection-radiation coupling terminal system based on intermittent heating and cooling according to the present invention;

[0054] Figure 2 Schematic diagram of the operating conditions of the entire device according to an embodiment of the present invention;

[0055] Figure 3Schematic diagram of the coupled operating conditions of a radiator and a fan coil unit according to an embodiment of the present invention;

[0056] Figure 4 Schematic diagram of the coupled operating conditions of the fan coil unit and the wall radiation panel according to an embodiment of the present invention;

[0057] Figure 5 Schematic diagram of the coupled operating conditions of the radiator and the wall radiation panel according to an embodiment of the present invention;

[0058] Figure 6 This is a schematic diagram of a radiator operating alone according to an embodiment of the present invention;

[0059] Figure 7 Schematic diagram of a fan coil unit operating alone according to an embodiment of the present invention;

[0060] Figure 8 This is a schematic diagram of a wall radiation panel operating alone according to an embodiment of the present invention;

[0061] Among them, 1, water tank; 2, water source heat pump; 3, fan coil; 4, radiator; 5, wall radiation panel; 6, first valve; 7, second valve; 8, third valve; 9, fourth valve; 10, fifth valve; 11, sixth valve; 12, seventh valve; 13, eighth valve; 14, ninth valve; 15, tenth valve; 16, water pump; 17, room. DETAILED DESCRIPTION

[0062] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0063] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0064] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0065] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "placed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0066] See also Figure 1 As shown, it is a structural schematic diagram of the energy cascade convection radiation coupling terminal system based on intermittent heating and cooling of the present invention, an energy cascade convection radiation coupling terminal system based on intermittent heating and cooling, comprising:

[0067] a planning unit, configured to determine an initial air flow condition in the initial room according to the three-dimensional model of the initial room and the physical characteristics of the initial room, and to form a corresponding guidance model;

[0068] an installation unit connected to the planning unit for placing convection terminal devices and radiation terminal devices in response to the guidance model and forming corresponding operation rooms;

[0069] A sensing unit connected to the installation unit is used to detect the operating air flow conditions in the operating room and detect the flowing heat source, including detecting the number of heat-generating devices in each area of ​​the operating room and detecting the number of people in each area of ​​the operating room;

[0070] a comparison unit, which is connected to the planning unit and the sensing unit respectively, and is used to compare the air flow conditions of the initial room with the air flow conditions of the operating room, and determine whether the total heating or cooling supply of the heat source or the cooling source meets the standard based on the comparison result, and update the three-dimensional model as a new guidance model;

[0071] The control unit is connected to the sensing unit and the comparison unit respectively, and is used to divide the types of different areas in the operating room according to the air flow conditions and the temperature requirements of different areas in the operating room, and switch the different operating conditions of the convection terminal device and the radiation terminal device according to the number of people in each area of ​​the operating room and the number of heating devices in each area of ​​the operating room, including:

[0072] When it is determined that the total heating or cooling supply of the heat source or cold source does not meet the standard, the electric heating auxiliary device or cooling auxiliary device of the water source heat pump is turned on;

[0073] Switch between different operating conditions of convection terminal equipment and radiation terminal equipment at different time periods;

[0074] Connect various operating equipment to work in series under different operating conditions;

[0075] Among them, physical characteristics include room dimensions, door and window locations, and external heat source distribution;

[0076] Air flow conditions include air flow velocity, air flow direction and temperature distribution;

[0077] The flow heat source is composed of the number of heating devices and the number of people. The heating equipment is a device that releases heat to the surrounding environment during its own operation.

[0078] Specifically, the system of the present invention simulates the air flow in the room by setting up a three-dimensional model in combination with the physical characteristics of the room. By simulating the interaction between air flow and temperature field, it can predict the temperature distribution in different areas of the room, and then adjust the ventilation and air-conditioning system to avoid local overheating or overcooling areas, create a more comfortable thermal environment for people, and improve the thermal comfort of indoor personnel. Then, the equipment is placed according to the air flow conditions. When the air-conditioning equipment is placed according to the direction and characteristics of the air flow in the room, the hot and cold air blown out by the air-conditioning equipment can be more evenly diffused in the room with the help of natural air flow. By accurately grasping the air flow laws to place the air-conditioning equipment, it can be avoided that the air-conditioning equipment cannot effectively diffuse and cause long-term high-power operation. After reasonable placement, the hot and cold air are evenly distributed, and only relatively little energy is needed to maintain a stable and comfortable indoor temperature, which plays a role in energy saving and emission reduction, and effectively improves the accuracy and practicality of the energy ladder convection-radiation coupling terminal system based on intermittent heating and cooling.

[0079] Specifically, it also includes:

[0080] Convection terminal equipment, which includes a fan coil unit, which is connected to the control unit and is used for convection heat exchange with the air in the operating room;

[0081] The radiation terminal device includes a radiator and a wall radiation panel, which are respectively connected to the control unit and the convection terminal device to perform radiation heat exchange with the air in the operating room.

[0082] In implementation, see Figure 2As shown, it is a schematic diagram of the operating conditions of the entire equipment of an embodiment of the present invention. The energy cascade convection-radiation coupling terminal system includes a water tank 1, a water source heat pump 2, a fan coil unit 3, a radiator 4, a wall radiation panel 5, a first valve 6, a second valve 7, a third valve 8, a fourth valve 9, a fifth valve 10, a sixth valve 11, a seventh valve 12, an eighth valve 13, a ninth valve 14, a tenth valve 15 and a water pump 16; wherein, the water tank 1 is connected to the water pump 16, the first valve 6 and the second valve 7 respectively through pipes; the water source heat pump 2 is connected to the fan coil unit 3, the second valve 7, the third valve 8, the fourth valve 9 and the fifth valve 10 respectively through pipes; the fan coil unit 3 is connected to the water source heat pump 2 through a pipe; the radiator 4 is connected to the first valve 6 and the seventh valve 12 respectively through pipes; the wall radiation panel 5 is connected to the ninth valve 14 and the fifth valve 10 respectively through pipes; the first valve 6 is connected to the water tank 1, the radiator 4 and the second valve 7 respectively through pipes; the second valve 7 is connected to the water tank 1, the first valve 6. The third valve 8 is connected to the water source heat pump 2 through a pipeline; the third valve 8 is connected to the second valve 7, the water source heat pump 2, and the sixth valve 11 through pipelines; the fourth valve 9 is connected to the ninth valve 14, the tenth valve 15, the water source heat pump 2, and the fifth valve 10 through pipelines; the fifth valve 10 is connected to the fourth valve 9, the water source heat pump 2, the seventh valve 12, and the wall radiation panel 5 through pipelines; the sixth valve 11 is connected to the third valve 8 and the eighth valve 13 through pipelines; the seventh valve 12 is connected to the radiator 4, the wall radiation panel 5, and the fifth valve 10 through pipelines; the eighth valve 13 is connected to the radiator 4, the sixth valve 11, the seventh valve 12, and the ninth valve 14 through pipelines; the ninth valve 14 is connected to the eighth valve 13, the tenth valve 15, and the wall radiation panel 5 through pipelines; the tenth valve 15 is connected to the fourth valve 9, the ninth valve 14, and the water pump 16 through pipelines; the fan coil unit 3, the radiator 4, and the wall radiation panel 5 are arranged in the room 17.

[0083] The water tank 1, the water source heat pump 2, the radiator 4 and the wall radiation panel 5 are connected in series, and the end of the series connection can be changed by changing the valve switch.

[0084] It can be understood that in heating mode, the water in the water tank is hot water and the air blown out by the fan coil is hot air; in cooling mode, the water in the water tank is low-temperature water and the air blown out by the fan coil is cold air.

[0085] Specifically, the system of the present invention forms a convection-radiation coupled terminal system by combining radiators, fan coil units and wall radiation panels in series. It can have both the rapid heating or cooling effect of the convection terminal and the good comfort and large thermal inertia effect of the radiation terminal, and can switch the heating or cooling conditions at will to meet the intermittent heating or cooling requirements of various scenarios. In addition, the system uses the energy cascade utilization theory to improve energy utilization and is applicable to more types of energy. The energy cascade utilization fully reflects the cherishment and efficient use of limited energy resources. By extending the use chain of each energy as much as possible and reducing energy waste, it further improves the accuracy and practicality of the energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling.

[0086] Specifically, the planning unit determines the initial air flow condition in the initial room according to the three-dimensional model of the initial room and the physical characteristics of the initial room, wherein:

[0087] Set the initial room physics into the 3D model,

[0088] Divide the three-dimensional model into grids according to the air flow velocity.

[0089] Calculate the air flow conditions within each grid and draw an air streamline diagram.

[0090] It is understandable that in order to set the physical characteristics of the initial room into the three-dimensional model, it is necessary to use professional modeling software, optional SolidWorks and SketchUp, to create a three-dimensional geometric model of the initial room, accurately depict the shape and size of the room, including the layout of the walls, ceiling, and floor, as well as the position and size of openings such as doors, windows, and vents, and clarify the conditions of the boundaries of the room, such as the thermal conductivity of the walls, whether they are insulated, and other properties. For doors and windows, it is necessary to determine their degree of opening and the boundary conditions for air inflow and outflow, and set the initial parameters such as the temperature, pressure, and velocity of the air in the room at the initial moment. Generally, reasonable estimates can be made based on the actual common indoor environmental conditions. The optional initial indoor temperature is set to 25 degrees Celsius and the pressure is standard atmospheric pressure.

[0091] It can be understood that the three-dimensional model is meshed according to the air flow speed, and the mesh type is reasonably selected according to the geometric characteristics of the room. Structured mesh and unstructured mesh are optional, and the density of the mesh is controlled. The mesh is appropriately denser in areas where the air flow changes drastically, and the mesh can be appropriately sparse in areas where the air flow is relatively stable.

[0092] It can be understood that the air flow conditions in each grid are calculated and the air streamline diagram is drawn. The previously determined physical characteristic parameters such as boundary conditions and initial conditions are imported into the simulation software. Then, based on the selected numerical calculation method, the optional Navier-Stokes equations and energy conservation equations that describe the control equations of the air flow are discretized, and the continuous partial differential equations are converted into a set of algebraic equations. The discretized set of equations is iteratively solved. As the number of iterations increases, the calculation results will gradually converge to a stable solution that meets certain accuracy requirements. In this process, it is necessary to pay close attention to the convergence of the calculation and judge whether a reasonable result has been obtained by checking indicators such as residuals. If the residuals do not meet the convergence requirements, it may be necessary to adjust the calculation parameters and continue the iterative solution to draw the air streamline diagram.

[0093] Specifically, the installation unit response guides the model to place the convection terminal equipment and the radiation terminal equipment, where

[0094] The wall radiation panel is placed on the wall on the side without external heat source distribution;

[0095] The radiator is placed at the door and window position;

[0096] Place fan coil units according to room size;

[0097] It is understandable that the room size includes area factors, height factors and shape factors. Based on the above factors, fan coil units of different specifications and models should be selected for installation.

[0098] The external heat source is a heat source outside the initial room that can generate heat and affect the internal thermal environment of the initial room.

[0099] Specifically, the control unit divides the types of different areas in the operating room according to the air flow conditions and the temperature requirements of different areas in the operating room, wherein,

[0100] If the average air flow rate in the area is greater than or equal to the preset flow rate value and the temperature demand range difference in the area is less than the preset temperature difference, the control unit divides the area into a temperature sensitive area;

[0101] If the average air flow rate in the area is greater than or equal to the preset flow rate value and the temperature requirement range difference in the area is greater than or equal to the preset temperature difference, the control unit divides the area into a temperature tolerance zone;

[0102] If the average air flow rate in the area is less than the preset flow rate value and the temperature demand range difference in the area is less than the preset temperature difference, the control unit divides the area into a special temperature demand area;

[0103] If the average air flow rate in the area is less than the preset flow rate value and the temperature demand range difference in the area is greater than or equal to the preset temperature difference, the control unit divides the area into a constant temperature zone;

[0104] In implementation, the preset flow rate value is 0.6 meters per second, and the preset temperature difference is 5 degrees Celsius. If the average air flow rate in the area is 1.0 meters per second, which is greater than the preset flow rate value of 0.6 meters per second, and the temperature demand range difference in the area is 2 degrees Celsius, which is less than the preset temperature difference of 5 degrees Celsius, the control unit will classify the area as a temperature sensitive area.

[0105] If the average air velocity in the area is 0.8 meters per second, which is greater than the preset velocity value of 0.6 meters per second, and the temperature demand range difference in the area is 8 degrees Celsius, which is greater than the preset temperature difference of 5 degrees Celsius, the control unit will classify the area as a temperature tolerance zone;

[0106] If the average air velocity in the area is 0.4 meters per second, which is less than the preset velocity value of 0.6 meters per second, and the temperature demand range difference in the area is 2 degrees Celsius, which is less than the preset temperature difference of 5 degrees Celsius, the control unit will classify the area as a special temperature demand area;

[0107] If the average air flow rate in the area is 0.3 meters per second, which is less than the preset flow rate value of 0.6 meters per second and the temperature demand range difference in the area is 10 degrees Celsius, which is greater than the preset temperature difference, the control unit divides the area into a constant temperature zone.

[0108] The preset flow rate values ​​are related to the physical characteristics of the room, and the preset temperature difference values ​​are related to the uses of different areas of the room.

[0109] It is understandable that the physical characteristics of a room include room size, door and window positions, and external heat source distribution. Room size includes area factors, height factors, and shape factors. For rooms with larger areas, in order to ensure that the air can circulate well throughout the space and achieve the goals of evenly regulating the temperature, delivering fresh air, and exhausting dirty air, a relatively high flow rate is often required. For example, in a large conference room with an area of ​​100 square meters, if the air in various parts of the room is to complete an effective circulation in a short period of time, a higher air flow rate needs to be set, which may be around 0.2-0.5 meters per second. For a small storage room with an area of ​​10 square meters, due to the small space, 0.1-0.2 meters per second can meet the basic requirements. The ventilation requirements of this building are as follows: in higher rooms, such as factories and auditoriums with a floor height of 3.5 meters or above, it is relatively difficult to mix the air in the vertical direction, and hot air easily accumulates at the top. A higher flow rate is required to promote the full mixing of air at different height levels to evenly distribute hot and cold air. For example, in an industrial plant with a floor height of 4 meters, in order for the ventilation system to operate effectively and for fresh air to be delivered from the bottom to the top and circulate well, the preset air flow rate may have to reach 0.3-0.6 meters per second. The floor height of ordinary residences is mostly between 2.8 and 3 meters. Natural air convection is relatively easy, and the preset flow rate required to maintain a comfortable environment is relatively low. 0.1-0.3 meters per second can meet the basic needs of indoor air conditioning. ; In a long and narrow room, the distance for air to flow from one end to the other is long, and dead corners of air flow are prone to occur. In order to allow the air to fully cover every corner, it is often necessary to increase the flow rate appropriately to enhance the air delivery capacity. For example, a long and narrow corridor with a length of 10 meters and a width of 3 meters, compared with a square room with a side length of 5 meters, under the same ventilation requirements, the long and narrow corridor needs to increase the flow rate by 10%-20% to ensure that the air can smoothly pass through the entire space and avoid the phenomenon of local poor ventilation. In rooms with more regular shapes, close to squares or circles, the air flow is relatively smooth, and the required preset flow rate can be relatively lower; when the doors and windows of the room are in relatively symmetrical positions, the indoor air circulates more smoothly. If the doors and windows are located Asymmetric ventilation can easily lead to faster airflow in some areas and slower airflow in others. If the building orientation of a room allows it to be exposed to direct sunlight for a long period of time, such as a south-facing room in the northern hemisphere's summer, the solar radiation is strong. The exterior walls absorb a large amount of heat and conduct it into the room, causing the indoor temperature to rise. To maintain a comfortable indoor temperature environment, the heat needs to be quickly removed through air flow. In this case, a higher preset airflow rate is often required. For example, in a south-facing office, the exterior wall temperature can be much higher than the indoor temperature during strong afternoon sunlight. To ensure the indoor temperature is maintained at a comfortable 24-26 degrees Celsius, the ventilation system's preset airflow rate may need to be increased from the conventional 0.2-0.3 meters per second to 0.3-0.The preset flow rate can be lowered appropriately if the room is in the shadow of other buildings, where it receives relatively little solar radiation and the indoor temperature is less affected by external heat. For example, in cities, some rooms located on the north side of tall buildings, where the indoor temperature is relatively stable, can have a flow rate set at around 0.1-0.2 meters per second.

[0110] It is understandable that different areas of a room have different requirements for temperature differences. Bedrooms are primarily used for rest and sleep, where people hope to have a comfortable, quiet, and relaxing environment. Usually, the temperature in bedrooms should be kept relatively stable and moderate, with a preset temperature difference of around 1-3 degrees Celsius. Meeting rooms and other places have high mobility of personnel and more equipment, so the preset temperature difference is generally around 3-5 degrees Celsius.

[0111] Specifically, the present invention divides the types of different areas in the operating room according to the air flow conditions and the temperature requirements of different areas in the operating room. Through such division, the specific temperature requirement characteristics of each area can be clearly known, and targeted temperature adjustment measures can be taken. For example, in a large office space, the area near the window is affected by sunlight, and the temperature requirement may be relatively low, while the middle part of the room is where more people gather and the temperature requirement is moderate. After these areas are classified separately, the air volume, wind speed and temperature settings of the air-conditioning outlets in different areas can be adjusted to accurately meet the desired temperature conditions of each area, avoid overcooling or overheating in some areas, and improve the overall thermal comfort of indoor people. At the same time, the areas are divided and regulated according to actual temperature requirements, avoiding excessive cooling or heating of the entire room to meet the special temperature requirements of individual areas, reducing unnecessary energy consumption, and further improving the accuracy and practicality of the energy ladder convection-radiation coupling terminal system based on intermittent heating and cooling.

[0112] Specifically, the control unit calculates the energy supply parameters of each area in the operating room according to the number of people in each area in the operating room and the number of heating devices in each area in the operating room.

[0113] It can be understood that the energy supply parameter = A × the number of people in each area of ​​the operating room + B × the number of heating devices in each area of ​​the operating room, where A is the parameter of the number of people in the room, which is taken as 0.2; B is the parameter of the heating device in the room, which is taken as 0.8; for example, if the number of people in each area of ​​the operating room is 5 and the number of heating devices in each area of ​​the operating room is 2, then the energy supply parameter = 0.2×5+0.8×2=2.6.

[0114] Specifically, the control unit divides a single area in the operating room into a temperature sensitive area, compares the energy supply parameters of the area with the preset energy supply parameters, and switches the different operating conditions of the convection terminal device and the radiation terminal device in the area according to the comparison result, wherein,

[0115] If the energy supply parameter is less than the preset energy supply parameter, the radiator will be operated alone;

[0116] If the energy supply parameter is greater than or equal to the preset energy supply parameter, the full equipment operation condition will be run;

[0117] In the implementation, the preset energy supply parameter is 2. If the energy supply parameter is 1.6, which is less than the preset energy supply parameter 2, the radiator is operated in a separate operation condition;

[0118] If the energy supply parameter is 2.4, which is greater than the preset energy supply parameter 2, the full equipment operating condition will be run.

[0119] See also Figure 6 As shown in the figure, it is a schematic diagram of the operating condition of the radiator alone according to an embodiment of the present invention. During implementation, the first valve 6, the eighth valve 13 and the tenth valve 15 are opened, and the other valves are kept closed. The hot water or low-temperature water running route is shown by the arrow in the figure. The hot water or low-temperature water flows from the water tank 1 into the radiator 4 and then returns to the water tank 1 through the water pump 16 to complete the cycle.

[0120] Please continue reading Figure 2 As shown in the figure, it is a schematic diagram of the operating conditions of the entire device according to an embodiment of the present invention. During implementation, the first valve 6, the sixth valve 11, the third valve 8, the fifth valve 10, the ninth valve 14 and the tenth valve 15 are opened, and the remaining valves are kept closed. The hot water or low-temperature water running route is shown by the arrows in the figure. The hot water or low-temperature water flows from the water tank 1 into the radiator 4, and then flows into the water source heat pump 2. The hot water or low-temperature water in the water source heat pump 2 exchanges heat with the air in the fan coil 3, and then flows into the wall radiation panel 5, and finally returns to the water tank 1 through the water pump 16 to complete the cycle.

[0121] The preset energy supply parameters are positively correlated with the area of ​​the operating room. The operating conditions include fan coil unit operation alone, radiator operation alone, wall radiation panel operation alone, radiator and fan coil unit coupled operation, fan coil unit and wall radiation panel coupled operation, radiator and wall radiation panel coupled operation, and full equipment operation. The full equipment operation condition is the radiator, fan coil unit and wall radiation panel coupled operation condition.

[0122] It is understandable that the larger the operating room area, the more people it can accommodate and the more heating equipment it can accommodate, the larger the preset energy supply parameters.

[0123] Optionally, the operating room area is 10 square meters and the preset energy supply parameter is 1.2;

[0124] The operating room area is 20 square meters, and the preset energy supply parameter is 1.6;

[0125] The operating room area is 30 square meters and the preset energy supply parameter is 3.8.

[0126] Specifically, the control unit divides a single area in the operating room into a temperature tolerance zone, compares the energy supply parameters of the area with the preset energy supply parameters, and switches the different operating conditions of the convection terminal device and the radiation terminal device in the area according to the comparison result, wherein,

[0127] If the energy supply parameter is less than the preset energy supply parameter, the wall radiation panel will be operated alone;

[0128] If the energy supply parameter is greater than or equal to the preset energy supply parameter, the radiator and fan coil coupling operation condition is run.

[0129] In the implementation, the preset energy supply parameter is 2. If the energy supply parameter is 1.5, which is less than the preset energy supply parameter 5, the wall radiation panel will be operated alone.

[0130] If the energy supply parameter is 2.4, which is greater than the preset energy supply parameter 2, the radiator and fan coil coupling operation condition will be operated.

[0131] See also Figure 8 As shown in the figure, it is a schematic diagram of the operating condition of the wall radiation panel alone according to an embodiment of the present invention. During operation, the second valve 7, the fifth valve 10, the ninth valve 14 and the tenth valve 15 are opened, and the other valves remain closed. The hot water or low-temperature water flow route is shown by the arrows in the figure. The hot water or low-temperature water flows from the water tank 1 into the water source heat pump 2, then flows into the wall radiation panel 5, and finally returns to the heating water tank 1 through the water pump 16 to complete the cycle. At this time, the water source heat pump 2 and the fan coil unit 3 are not running.

[0132] See also Figure 3 As shown in the figure, it is a schematic diagram of the coupled operating conditions of the radiator and the fan coil unit according to an embodiment of the present invention. During implementation, the first valve 6, the sixth valve 11, the third valve 8, the fourth valve 9 and the tenth valve 15 are opened, and the remaining valves are kept closed. The hot water or low-temperature water running route is shown by the arrows in the figure. The hot water or low-temperature water flows from the water tank 1 into the radiator 4, and then flows into the water source heat pump 2. The hot water or low-temperature water in the water source heat pump 2 exchanges heat with the air in the fan coil unit 3, and then returns to the water tank 1 through the water pump 16 to complete the cycle.

[0133] Specifically, the control unit divides a single area in the operating room into a special temperature demand area, compares the energy supply parameters of the area with the preset energy supply parameters, and switches the different operating conditions of the convection terminal device and the radiation terminal device in the area according to the comparison result, wherein,

[0134] If the energy supply parameter is less than the preset energy supply parameter, the fan coil unit will be operated in a separate operating mode;

[0135] If the energy supply parameter is greater than or equal to the preset energy supply parameter, the fan coil unit and the wall radiation panel will be operated in a coupled operating condition.

[0136] In the implementation, the preset energy supply parameter is 2. If the energy supply parameter is 1.6, which is less than the preset energy supply parameter 2, the fan coil unit will be operated in a separate operation mode;

[0137] If the energy supply parameter is 2, which is equal to the preset energy supply parameter 2, the fan coil unit and the wall radiation panel will be operated in a coupled operating condition.

[0138] See also Figure 7 As shown in the figure, it is a schematic diagram of the fan coil unit operating alone according to an embodiment of the present invention. During implementation, the second valve 7, the fourth valve 9 and the tenth valve 15 are opened, and the other valves are kept closed. The hot water or low-temperature water running route is shown by the arrows in the figure. The hot water or low-temperature water flows from the water tank 1 into the water source heat pump 2. The hot water or low-temperature water in the water source heat pump 2 exchanges heat with the air in the fan coil unit 3 and then returns to the water tank 1 through the water pump 16 to complete the cycle.

[0139] See also Figure 4 As shown in the figure, it is a schematic diagram of the coupled operating conditions of the fan coil unit and the wall radiation panel according to an embodiment of the present invention. During implementation, the second valve 7, the fifth valve 10, the ninth valve 14 and the tenth valve 15 are opened, and the other valves are kept closed. The hot water or low-temperature water running route is shown by the arrows in the figure. The hot water or low-temperature water flows from the water tank 1 into the water source heat pump 2. The hot water or low-temperature water in the water source heat pump 2 exchanges heat with the air in the fan coil unit 3 and then flows into the wall radiation panel 5. Finally, it returns to the water tank 1 through the water pump 16 to complete the cycle.

[0140] Specifically, when the control unit divides a single area in the operating room into a constant temperature zone, the radiator and the wall radiation panel operate in a coupled operating condition.

[0141] See also Figure 5 As shown in the figure, it is a schematic diagram of the coupled operating conditions of the radiator and the wall radiation panel according to an embodiment of the present invention. During operation, the first valve 6, the eighth valve 13, the ninth valve 14 and the tenth valve 15 are opened, and the other valves remain closed. The hot water or low-temperature water flow route is indicated by the arrows in the figure. The hot water or low-temperature water flows from the water tank 1 into the radiator 4 and then into the wall radiation panel 5. Finally, it returns to the water tank 1 through the water pump 16 to complete the cycle.

[0142] Specifically, the present invention adjusts the equipment operating conditions in different areas according to the personnel situation and the heating equipment situation in each area of ​​the room. The number of people in different areas is different, and the heat dissipation of human bodies is also different. At the same time, the presence of heating equipment will additionally increase heat dissipation. By adjusting the air-conditioning operating conditions in a targeted manner, such as appropriately increasing the cooling capacity in areas with dense population, it is ensured that the ambient temperature of the personnel is suitable, avoiding the stuffy feeling caused by too many people; and for areas with heating equipment, the cooling power of the air-conditioning is reasonably adjusted according to the heat generated by the equipment, so that the temperature of the area is maintained in an appropriate range, making the staff in it feel comfortable, and effectively improving the temperature of the entire room. The thermal comfort of people in different areas of the room can be adjusted according to actual conditions, so that the temperature of each area can be balanced, and there will be no excessive difference in local temperature, creating a more comfortable and pleasant indoor environment. The air conditioner is controlled according to the actual heat generation of each area, which can avoid excessive cooling or heating of the entire room. For areas with a small amount of heating equipment and sparse personnel, there is no need for high-intensity cooling like areas with dense personnel and no heating equipment, thereby accurately controlling the energy consumption of the air conditioner, reducing unnecessary energy consumption, and further improving the accuracy and practicality of the energy cascade convection-radiation coupling terminal system based on intermittent heating and cooling.

[0143] During implementation, when the energy cascade convection-radiation coupling terminal system is intermittently heating or cooling, it can first open the first valve 6, the sixth valve 11, the third valve 8, the fifth valve 10, the ninth valve 14, and the tenth valve 15 according to the different heating or cooling needs of the scene, and operate the convection-radiation coupling terminal working condition formed by the coupling of the radiator, the fan coil unit, and the wall radiation panel to quickly heat up or cool down the room. When the indoor temperature reaches the heating or cooling demand, the sixth valve 11, the third valve 8, and the fifth valve 10 are closed, and the seventh valve 12 is opened, and the coupled terminal heating or cooling condition formed by the coupling of the radiator and the wall radiation panel is operated to ensure good thermal comfort in the room; thereafter, the sixth valve 11, the third valve 8, and the fifth valve 10 can be opened again, and the seventh valve 12 can be closed to operate the fan coil unit, so as to quickly adjust the indoor temperature so that the indoor temperature is within a temperature range suitable for the occupants.

[0144] During implementation, an energy ladder approach was adopted. In the heating state, the convection-radiation coupling end of the radiator, fan coil unit and wall radiation panel combination can emit 2000W of heat per hour, and its overall operation consumes 426W of electricity, with an energy efficiency ratio of 2000W / 426W=4.69. Compared with the fan coil unit running alone, it can emit 1000W of heat per hour, and its overall operation consumes 278W of electricity, with an energy efficiency ratio of 1000W / 278W=3.59, which is an increase of 30.6%.

[0145] In implementation, for intermittent heating, when rapid temperature increase is required, the convection-radiation coupling terminal operating condition of the combination of radiators, fan coil units and wall radiation panels can be used to quickly heat the room to a comfortable temperature of 20 degrees Celsius in the shortest time, and then switch operating conditions for different scenarios; for scenarios that require quietness and high comfort, such as office buildings, turn off the fan coil units and run the convection-radiation coupling terminal operating condition of the combination of radiators and wall radiation panels; for rural buildings with lower required temperatures, the minimum temperature is 16 degrees Celsius, only the radiator or wall radiation panel needs to be turned on to operate alone, and there is no need to provide too much heat, only the required temperature needs to be maintained. In addition, the above two scenarios can also quickly adjust the indoor temperature by turning on the fan coil units to achieve a temperature suitable for the residents.

[0146] During implementation, office buildings operate from 9 a.m. to 5 p.m., which is office hours, and require heating or cooling. During winter, the duty temperature must be maintained at 5 degrees Celsius during non-heating hours. In the early stages of the heating phase, rapid temperature increases are required, so the convection-radiation coupled terminal operating mode, consisting of a radiator, fan coil unit, and wall radiant panels, is turned on to raise the room to the desired temperature within a dozen minutes. However, due to the noise and high wind speed of the fan coil unit, indoor comfort levels are low, affecting office work. Therefore, the fan coil unit is turned off, and the convection-radiation coupled terminal operating mode, consisting of a radiator and wall radiant panels, is operated to maintain the room within the thermal comfort range, creating a comfortable environment for office workers.

[0147] In practice, for rural buildings, heating stops at 8 o'clock in the morning and needs to be heated up quickly at 11 o'clock in the afternoon. In this case, the convection-radiation coupling terminal operating condition of the radiator, fan coil and wall radiation panel combination needs to be turned on to raise the room to the required temperature within ten minutes. If rural residents are not sensitive to the noise and strong convection of the fan coil during the day, this condition can continue to operate in the stable stage and stop heating at 2 o'clock in the afternoon; at 5 o'clock in the afternoon, the convection-radiation coupling terminal operating condition of the radiator, fan coil and wall radiation panel combination is turned on to raise the room to the required temperature within ten minutes, and then the fan coil is turned off. The convection-radiation coupling terminal operating condition composed of the radiator and the wall radiation panel is operated to maintain the temperature at around 20 degrees Celsius. At 11 o'clock in the evening, the occupants need to sleep and the required temperature in the room drops. Therefore, the radiator or the wall radiation panel can be turned off, and only the wall radiation panel or the radiator can be operated alone. The room temperature is maintained at around 16 degrees Celsius. Then, at 6 o'clock the next day, the occupants wake up and the convection-radiation coupling terminal operating condition composed of the radiator, fan coil unit and wall radiation panel is turned on to quickly raise the room temperature to around 20 degrees Celsius, so that the occupants are in a comfortable environment.

[0148] It can be understood that the comparison unit compares the air flow conditions of the initial room with the air flow conditions of the operating room. In the heating mode, if the air temperature of the initial room is greater than the air temperature of the operating room, it is determined that the total heating supply or the total cooling supply of the heat source or the cold source does not meet the standard; in the cooling mode, if the air temperature of the initial room is lower than the air temperature of the operating room, it is determined that the total heating supply or the total cooling supply of the heat source or the cold source does not meet the standard; when the comparison unit determines that the total heating supply or the total cooling supply of the heat source or the cold source does not meet the standard, it analyzes the reasons for the inconsistency between the air flow velocity, air flow direction and temperature distribution in the operating room and the air flow velocity, air flow direction and temperature distribution in the initial room, and updates the air flow velocity, air flow direction and temperature distribution in the operating room to the three-dimensional model.

[0149] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0150] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling, characterized in that: include: a planning unit, configured to determine an initial air flow condition in the initial room according to the three-dimensional model of the initial room and the physical characteristics of the initial room, and to form a corresponding guidance model; an installation unit connected to the planning unit, configured to place convection terminal devices and radiation terminal devices in response to the guidance model and form corresponding operation rooms; a sensing unit connected to the mounting unit, configured to detect the operating air flow in the operating room and detect the flow heat source, including detecting the number of heat-generating devices in each area of ​​the operating room and the number of people in each area of ​​the operating room; a comparison unit, connected to the planning unit and the sensing unit, respectively, for comparing the air flow conditions of the initial room with the air flow conditions of the operating room, determining whether the total heating or cooling supply of the heat source or the cooling source meets the standard based on the comparison result, and updating the three-dimensional model as a new guidance model; A control unit, which is respectively connected to the sensing unit and the comparison unit, is used to divide the types of different areas in the operating room according to the air flow conditions and the temperature requirements of different areas in the operating room, and switch the different operating conditions of the convection terminal device and the radiation terminal device according to the number of people in each area of ​​the operating room and the number of heating devices in each area of ​​the operating room, including: When it is determined that the total heating supply or the total cooling supply of the heat source or the cooling source does not meet the standard, turning on the electric heating auxiliary device or the cooling auxiliary device of the water source heat pump; Switching between different operating conditions of the convection terminal device and the radiation terminal device at different time periods; The various operating devices are operated in series under the different operating conditions; The physical characteristics include room dimensions, door and window locations, and external heat source distribution; Air flow conditions include air flow velocity, air flow direction and temperature distribution; The fluid heat source is composed of the number of the heat generating devices and the number of people. The heat generating devices are devices that release heat to the surrounding environment during their own operation.

2. The energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling according to claim 1 is characterized in that: Also includes: The convection terminal device includes a fan coil unit, which is connected to the control unit and is used for convection heat exchange with the air in the operating room; The radiation terminal device includes a radiator and a wall radiation panel, which are respectively connected to the control unit and the convection terminal device to perform radiation heat exchange with the air in the operating room.

3. The energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling according to claim 2 is characterized in that: The planning unit determines the initial air flow condition in the initial room according to the three-dimensional model of the initial room and the physical properties of the initial room, wherein: setting the physical properties of the initial room into the three-dimensional model, Divide the three-dimensional model into grids according to the air flow velocity, The air flow conditions in each grid are calculated and an air streamline diagram is drawn.

4. The energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling according to claim 3 is characterized in that: The installation unit places the convection terminal device and the radiation terminal device in response to the guidance model, wherein: The wall radiation panel is placed on the wall on the side where the external heat source is not distributed; The radiator is placed at the door and window position; placing the fan coil unit according to the room size; The external heat source is a heat source outside the initial room that can generate heat and affect the internal thermal environment of the initial room.

5. The energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling according to claim 4 is characterized in that: The control unit divides the types of different areas in the operating room according to the air flow conditions and the temperature requirements of different areas in the operating room, wherein: If the average air flow rate in the area is greater than or equal to the preset flow rate value and the temperature requirement range difference in the area is less than the preset temperature difference, the control unit classifies the area as a temperature sensitive area; If the average air flow rate in the area is greater than or equal to the preset flow rate value and the temperature requirement range difference in the area is greater than or equal to the preset temperature difference, the control unit divides the area into a temperature tolerance zone; If the average air flow rate in the area is less than the preset flow rate value and the temperature requirement range difference in the area is less than the preset temperature difference, the control unit divides the area into a special temperature requirement area; If the average air flow rate in the area is less than the preset flow rate value and the temperature requirement range difference in the area is greater than or equal to the preset temperature difference value, the control unit divides the area into a constant temperature area; The preset flow rate value is related to the physical characteristics of the room, and the preset temperature difference value is related to the purpose of different areas of the room.

6. The energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling according to claim 5 is characterized in that: The control unit calculates the energy supply parameters of each area in the operating room according to the number of people in each area in the operating room and the number of heating devices in each area in the operating room.

7. The energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling according to claim 6 is characterized in that: The control unit, when dividing a single area in the operating room as the temperature sensitive area, compares the energy supply parameters of the area with the preset energy supply parameters, and switches the different operating conditions of the convection terminal device and the radiation terminal device in the area according to the comparison result, wherein, If the energy supply parameter is less than the preset energy supply parameter, the radiator is operated in a separate operation mode; If the energy supply parameter is greater than or equal to the preset energy supply parameter, the full equipment operation condition is run; The preset energy supply parameters are positively correlated with the area of ​​the operating room. The operating conditions include the fan coil unit's separate operating condition, the radiator's separate operating condition, the wall radiation panel's separate operating condition, the radiator and fan coil unit's coupled operating condition, the fan coil unit's and wall radiation panel's coupled operating condition, the radiator and wall radiation panel's coupled operating condition, and the full-equipment operating condition. The full-equipment operating condition is the radiator, fan coil unit, and wall radiation panel's coupled operating condition.

8. The energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling according to claim 7 is characterized in that: The control unit, when dividing a single area in the operating room into the temperature tolerance zone, compares the energy supply parameters of the area with the preset energy supply parameters, and switches the different operating conditions of the convection terminal device and the radiation terminal device in the area according to the comparison result, wherein, If the energy supply parameter is less than the preset energy supply parameter, the wall radiation panel is operated in a separate operation mode; If the energy supply parameter is greater than or equal to the preset energy supply parameter, the radiator and fan coil coupling operation condition is operated.

9. The energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling according to claim 8 is characterized in that: The control unit, when dividing a single area in the operating room into the special temperature demand area, compares the energy supply parameters of the area with the preset energy supply parameters, and switches the different operating conditions of the convection terminal device and the radiation terminal device in the area according to the comparison result, wherein, If the energy supply parameter is less than the preset energy supply parameter, the fan coil unit is operated in a separate operation mode; If the energy supply parameter is greater than or equal to the preset energy supply parameter, the fan coil unit and the wall radiation panel are operated in a coupled operating condition.

10. The energy cascade convection-radiation coupled terminal system based on intermittent heating and cooling according to claim 9 is characterized in that: The control unit operates the radiator and the wall radiation panel in a coupled operation mode when a single area in the operating room is divided into the constant temperature zone.

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