Radiation convection end device

Abstract

The utility model discloses a radiation convection terminal device, and relates to the technical field of environmental refrigeration and heating. Comprising a fixed back plate and a radiation flat plate, a fan is arranged above the fixed back plate, the peak capacity of the system can be improved by adopting convection and radiation, the requirement can be met with less circulating air volume under the conventional load, the fan noise is lower under the small air volume, and the system operation quietness is good; meanwhile, the internal refrigeration coil pipe is compatible with an indoor dehumidification function, and condensation of the radiant panel under the refrigeration working condition is avoided; and the radiation tail end can improve the air outlet temperature, reduce the air supply temperature difference, improve the comfort and avoid the sudden cold and hot phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of environmental cooling and heating technology, specifically a radiation convection terminal device. Background Technology

[0002] Radiant cooling and heating is gradually becoming the preferred choice for some users because it can significantly improve user comfort compared to convection cooling and heating. However, due to its thermal inertia and the need for an independent chilled water circulation system, the system becomes more complex and the cost increases accordingly. Therefore, radiant air conditioning systems are mostly found in commercial or laboratory settings with sufficient budgets, and are rarely used in the residential market.

[0003] Conventional fan coil convection heating and cooling terminal devices require the addition of a wind deflector when used in small furniture settings due to their strong blowing sensation. However, the wind deflector limits the effective air circulation volume, reducing the energy efficiency of the device and making it less economical. As an alternative heating and cooling terminal, radiant systems are slow to cool and heat due to thermal inertia, and are prone to condensation under high humidity cooling conditions, affecting the user experience. Utility Model Content

[0004] The purpose of this invention is to provide a radiation convection terminal device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a radiative convection terminal device, comprising a fixed back plate and a radiative plate, wherein a fan is disposed above the fixed back plate, the fan comprising a placement cavity with a lower opening, a cross-flow impeller disposed within the placement cavity, and a return air inlet disposed on the surface of the placement cavity, and a flow guide grille is disposed below the radiative plate.

[0006] A heat exchanger with a heat exchanger connection pipe port is also provided above the fixed back plate, and an electric heater is provided below the heat exchanger. A temperature sensor is connected to one end of the heat exchanger through a temperature sensor positioning card.

[0007] As a further embodiment of this utility model: both ends of the placement cavity are provided with an electrical control base box for placing the electrical control box. The placement cavity is provided with a variable frequency motor for driving the cross-flow impeller to rotate. A connecting partition is provided at the bottom of the placement cavity. The electrical control base box is sealed by an electrical control box cover. Two sets of cross-flow impellers and variable frequency motors are symmetrically arranged in the placement cavity. The electrical control box cover is fixed to the electrical control base box by a threaded rod.

[0008] As a further embodiment of this utility model: a guide plate is provided on the lower end face of the placement cavity, a drain pipe is provided on the inner wall of the fixed back plate and extends to the outside of the fixed back plate, a water receiving tray is connected through the drain pipe, a number of evenly distributed partitions are provided inside the water receiving tray, the drain pipe is connected to the water receiving tray, and the water receiving tray is provided with an inclined slope.

[0009] As a further improvement of this utility model: the outer surface of the radiant plate is coated with a color-changing layer, the surface of the radiant plate is provided with an extremely hydrophobic coating, the bottom of the radiant plate is provided with a horizontal water-guiding groove structure, the upper end of the radiant plate is provided with an LED light strip, and the left and right sides of the back of the fixed back plate are provided with heat insulation layers.

[0010] As a further improvement of this utility model: a decorative panel is provided above the radiating plate, and the decorative panel has threaded holes.

[0011] As a further improvement of this utility model: the fixed back plate is higher than the radial plate by half the height of the flow guide grid at the outlet, and a chamfered structure is provided on the lower side of the flow guide grid.

[0012] As a further improvement of this utility model: the fixed back plate is provided with several sets of hooks inside, the inner wall of the radiating plate is provided with multiple second hooks for attaching to the hooks, and the fixed back plate is provided with reinforcing ribs inside.

[0013] As a further embodiment of this utility model: both sides of the interior of the fixed back plate are provided with fixed edges, and a second threaded hole is provided on the fixed edge. The radiating plate and the fixed back plate are fixed by multiple screws passing through the threaded hole and the second threaded hole.

[0014] As a further improvement of this utility model, a filter screen is provided between the return air vent and the placement cavity.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model provides a radiant convection terminal device, which adopts a design combining convection and radiation. The upper part is a horizontal strip return air inlet, which, together with a fan and a heat exchanger, and a small chiller, forms a cold medium circuit. The lower part of the device is a flat radiant surface. When the airflow treated by the heat exchanger flows through the back channel of the radiant flat plate, it cools or heats the radiant flat plate through convection heat exchange, while raising or lowering the outlet air temperature and reducing the supply air temperature difference. The radiant flat plate radiates heat to people or equipment in the room in the form of radiation, and under the guidance of the supply and exhaust airflow from the lower air outlet and the upper return air inlet, it exchanges heat with the indoor air through the form of convective heat exchange.

[0017] 2. This utility model uses convection plus radiation to increase the peak capacity of the system. Under normal load, less circulating air volume can meet the needs. The fan noise is lower under small air volume, and the system operates quietly. At the same time, the internal cooling coil is compatible with indoor dehumidification function, avoiding condensation on the radiant panel under cooling conditions. In addition, the radiant terminal will improve the outlet air temperature, reduce the supply air temperature difference, improve comfort, and avoid sudden temperature changes.

[0018] 3. The outer surface of the radiant flat panel is coated with a color-changing layer, specifically using a low-temperature reversible thermochromic material to create the pattern. The pattern changes color when the temperature is below 20℃ or above 40℃, corresponding to summer cooling and winter heating conditions. In summer cooling conditions, the air supply temperature is around 16-18℃, causing the surface temperature of the radiant flat panel to be below 20℃, resulting in a cool-colored pattern. Conversely, in heating conditions, the air supply temperature of around 45℃ causes the surface temperature of the radiant flat panel to be above 40℃, resulting in a warm-colored pattern. This better matches the human body's perception of temperature, enhancing the corresponding experience through visual perception while providing cooling and heating, and also serving as part of the interior decoration—a win-win situation.

[0019] 4. The surface of the radiant flat plate is coated with an extremely hydrophobic coating to improve its anti-condensation ability. The bottom of the radiant flat plate is equipped with a horizontal water guide channel structure, so that the thickness of the water film on the surface is controlled to the tens of micrometers under the action of gravity and hydrophilic materials. This can also prevent condensation under high humidity conditions. As dehumidification at the coil is carried out, the situation will gradually improve. At the same time, the left and right sides of the fixed back plate are equipped with insulation layers to prevent the formation of cold bridges that transfer heat and cold to the outside through the wall, thereby improving the energy efficiency of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 Enlarged view at point A;

[0022] Figure 3 for Figure 2 Enlarged view at point B;

[0023] Figure 4 This is a schematic diagram showing the position of the flow guide grille in an embodiment of this utility model;

[0024] In the diagram: 1. Fixed back plate; 2. Radiant flat plate; 3. Electrical control box cover; 4. Cross-flow impeller; 5. Filter screen; 6. Return air inlet; 7. Guide grille; 8. Reinforcing rib; 9. Fixed edge; 10. Threaded hole; 11. Placement cavity; 01. Electrical control base box; 02. Variable frequency motor; 03. Connecting partition; 05. Heat exchanger; 06. Electric heater; 07. Hook; 001. Guide plate; 002. LED light strip; 004. Temperature sensor positioning clip; 005. Heat exchanger connecting pipe port; 006. Water tray; 007. Partition; 008. Drain pipe; 0001. Second hook; 0002. Second threaded hole. Detailed Implementation

[0025] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] Reference Figures 1-4 As shown in the figure, a radiative convection terminal device of this utility model includes a fixed back plate 1 and a radiative plate 2. A fan is arranged above the fixed back plate 1. The fan includes a placement cavity 11 with a bottom opening, a cross-flow impeller 4 arranged in the placement cavity 11, and a return air port 6 arranged on the surface of the placement cavity 11. A flow guide grille 7 is arranged below the radiative plate 2. A heat exchanger 05 with a heat exchanger connection pipe port 005 is also arranged above the fixed back plate 1. The fixed back plate 1 is higher than half the height of the flow guide grille 7 at the outlet and has a chamfered structure on the lower side of the flow guide grille 7. This achieves aesthetics while increasing the rigidity of the outlet airflow and preventing the downward flow from accumulating dust at the outlet.

[0027] The device is a wall-mounted heating and cooling terminal, which reduces the impact on indoor ceiling height in small settings compared to ceiling-mounted units, improving space utilization. It adopts a design combining convection and radiation. The upper part is a horizontal strip return air vent, installed on a wall above 2m. The air outlet is a vertical downward strip vent with a strip width of ≤3cm. From the side, the overall structure is flat. It uses the return air vent 6, fan, and heat exchanger 05, along with a small chiller, to form a cold medium circuit. The lower part of the device is a flat radiant surface. The airflow treated by the heat exchanger 05 flows through the back channel of the radiant flat plate 2, cooling or heating the radiant flat plate 2 through convection heat exchange, while simultaneously increasing or decreasing the outlet air temperature and reducing the supply air temperature difference. The radiant flat plate 2 provides radiant heat exchange to people or equipment in the room through radiation, and also exchanges heat with the indoor air through convective airflow induced by the supply and exhaust airflow from the lower air outlet and the upper return air vent.

[0028] As a further improvement of this utility model: (Refer to...) Figure 1As shown, an electric heater 06 is installed below the heat exchanger 05. A filter screen 5 is installed between the return air inlet 6 and the placement chamber 11 to prevent foreign objects from entering the cross-flow impeller 4. A temperature sensor is connected to one end of the heat exchanger 05 through a temperature sensor positioning card 004. A temperature sensor is installed, and a return air temperature sensor is installed inside the return air inlet filter screen 5 to monitor the return air and the temperature in the middle of the evaporator. The equipment is controlled to operate according to the set temperature and humidity conditions. The electric heater 06 is used to supplement the heating in winter heating conditions to improve the heating speed and heating capacity of the equipment. In later maintenance, the return air inlet 6 can be opened to directly perform replacement, repair and other maintenance operations.

[0029] refer to Figure 1 as well as Figure 2 As shown, in other embodiments of this utility model: both ends of the placement cavity 11 are provided with an electrical control base box 01 for placing the electrical control box; a variable frequency motor 02 for driving the cross-flow impeller 4 to rotate is provided inside the placement cavity 11; a connecting partition 03 is provided at the bottom inside the placement cavity 11; the electrical control base box 01 is sealed by the electrical control box cover 3; two sets of cross-flow impeller 4 and variable frequency motor 02 are symmetrically arranged inside the placement cavity 11; and the electrical control box cover 3 is fixed to the electrical control base box 01 by a threaded rod.

[0030] Further reference Figure 2 as well as Figure 3 As shown, a guide plate 001 is provided on the lower end face of the placement cavity 11, and a drain pipe 008 is provided on the inner wall of the fixed back plate 1, extending through the outside of the fixed back plate 1. A water receiving tray 006 is connected through the drain pipe 008. Several evenly distributed baffles 007 are provided inside the water receiving tray 006. The cross-section of the air duct is gradually narrowed here, which will increase the air speed. The baffles 007 can effectively prevent water blowing. The drain pipe 008 is connected to the water receiving tray 006. The water receiving tray 006 is provided with an inclined slope so that the internal condensate flows to the side of the drain pipe 008, which facilitates drainage.

[0031] refer to Figure 1 as well as Figure 2As shown, in other embodiments of this utility model: a decorative panel 04 is provided above the radiating plate 2, and a threaded hole 10 is provided on the decorative panel 04. Several sets of hooks 07 are provided inside the fixed back plate 1. Multiple second hooks 0001 for attaching to the hooks 07 are provided on the inner wall of the radiating plate 2. A reinforcing rib 8 is provided inside the fixed back plate 1 to improve the rigidity of the plate and to serve as an embedded part for controlling the plate spacing, forming a whole with the guide grille 7 at the outlet. Fixed edges 9 are provided on both sides inside the fixed back plate 1, and a second hook 0001 is provided on the fixed edge 9. The radiant plate 2 and the fixed back plate 1 are fixed by multiple screws through the threaded holes 10 and 0002. The heat exchanger 05 is installed and fixed inside by the fixing plates on both sides. To disassemble, the radiant plate 2 needs to be opened first. To disassemble the radiant plate 2, the screws at the threaded holes 10 and 0002 on both sides need to be unscrewed first. Then, lift it up slightly so that the second hook 0001 is disengaged from the hook 07. It should be noted that before this, the return air vent should be removed to avoid interference during the lifting.

[0032] refer to Figure 1 as well as Figure 2 As shown, in other embodiments of this utility model: the outer surface of the radiant flat plate 2 is coated with a color-changing layer, specifically using a low-temperature reversible thermochromic material to create the pattern. When the temperature is below 20℃ and above 40℃, the color-changing pattern effect occurs, corresponding to summer cooling and winter heating conditions. In summer cooling conditions, the air supply temperature is around 16-18℃, which keeps the surface of the radiant flat plate below 20℃, resulting in a cool-colored pattern. In heating conditions, the opposite is true; due to the air supply temperature of around 45℃, the surface of the radiant flat plate is above 40℃, resulting in a warm-colored pattern. This better matches the human body's perception of hot and cold, enhancing the corresponding experience through visual perception while providing cooling and heating, and also serving as part of the interior decoration, achieving two goals at once.

[0033] The surface of the radiant flat plate 2 is coated with an extremely hydrophobic coating to improve its anti-condensation ability. The bottom of the radiant flat plate 2 is equipped with a horizontal water guide channel structure, so that the thickness of the surface water film is controlled to the tens of micrometers under the action of gravity and hydrophilic materials, which can also prevent condensation under high humidity conditions. As the dehumidification of the coil proceeds, the situation will gradually improve. The upper surface of the radiant flat plate 2 is equipped with an LED light strip 002 to form a top reflective auxiliary lighting strip to decorate the indoor environment. The left and right sides of the back of the fixed back plate 1 are equipped with insulation layers to avoid the formation of cold bridges that transfer heat and cold to the outside through the wall, thereby improving the energy efficiency of the equipment.

[0034] The working principle of this utility model is as follows: This utility model provides a radiant convection terminal device, which adopts a design combining convection and radiation. The upper part is a horizontal long strip return air inlet, which is set on the wall at a position of more than 2m. The air outlet is a vertical downward strip air outlet with a strip width of ≤3cm. The overall structure is flat when viewed from the side. It uses the return air inlet 6, the fan and the heat exchanger 05, and a small chiller to form a cold medium circuit. The lower part of the device is a flat radiant surface. When the airflow treated by the heat exchanger 05 flows through the back channel of the radiant flat plate 2, it cools or heats the radiant flat plate 2 through convection heat exchange, while raising or lowering the outlet air temperature and reducing the supply air temperature difference. The radiant flat plate 2 radiates heat to people or equipment in the room in the form of radiation. On the other hand, under the guidance of the supply and exhaust airflow from the air outlet at the lower part of the plate and the return air outlet at the upper part of the plate, it exchanges heat with the indoor air in the form of plate convective heat exchange.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A radiation convection terminal device, characterized in that, It includes a fixed back plate (1) and a radiating plate (2). A fan is provided above the fixed back plate (1). The fan includes a placement cavity (11) with a bottom opening, a cross-flow impeller (4) provided in the placement cavity (11), and a return air inlet (6) provided on the surface of the placement cavity (11). A guide grille (7) is provided below the radiating plate (2). Above the fixed back plate (1) is a heat exchanger (05) with a heat exchanger connection pipe port (005), and below the heat exchanger (05) is an electric heater (06). One end of the heat exchanger (05) is connected to a temperature sensor via a temperature sensor positioning card (004).

2. The radiation convection terminal device according to claim 1, characterized in that, Both ends of the placement cavity (11) are provided with an electrical control base box (01) for placing the electrical control box. The placement cavity (11) is provided with a variable frequency motor (02) for driving the cross-flow impeller (4) to rotate. A connecting partition (03) is provided at the bottom inside the placement cavity (11). The electrical control base box (01) is sealed by the electrical control box cover (3). The cross-flow impeller (4) and the variable frequency motor (02) are symmetrically arranged in two sets in the placement cavity (11). The electrical control box cover (3) is fixed to the electrical control base box (01) by a threaded rod.

3. The radiation convection terminal device according to claim 2, characterized in that, A guide plate (001) is provided on the lower end face of the placement cavity (11). A drain pipe (008) is provided on the inner wall of the fixed back plate (1) and extends to the outside of the fixed back plate (1). A water receiving tray (006) is connected through the drain pipe (008). Several evenly distributed partitions (007) are provided inside the water receiving tray (006). The drain pipe (008) communicates with the water receiving tray (006). The water receiving tray (006) is provided with an inclined slope.

4. A radiation convection terminal device according to claim 3, characterized in that, The outer surface of the radiant plate (2) is coated with a color-changing layer. The surface of the radiant plate (2) is provided with an extremely hydrophobic coating. The bottom of the radiant plate (2) is provided with a horizontal water channel structure. The upper surface of the radiant plate (2) is provided with an LED light strip (002). The left and right sides of the back of the fixed back plate (1) are provided with heat insulation layers.

5. A radiation convection terminal device according to claim 4, characterized in that, A decorative panel (04) is provided above the radiating plate (2), and a threaded hole (10) is provided on the decorative panel (04).

6. The radiation convection terminal device according to claim 1, characterized in that, The fixed back plate (1) is higher than the radiating plate (2) by half the height of the flow guide grille (7) at the outlet and has a chamfered structure on the lower side of the flow guide grille (7).

7. A radiation convection terminal device according to claim 5, characterized in that, The fixed back plate (1) is provided with several sets of hooks (07), the inner wall of the radiating plate (2) is provided with multiple second hooks (0001) for attaching to the hooks (07), and the fixed back plate (1) is provided with reinforcing ribs (8).

8. A radiation convection terminal device according to claim 5, characterized in that, The fixed back plate (1) has fixed edges (9) on both sides inside. The fixed edges (9) have second threaded holes (0002). The radiating plate (2) and the fixed back plate (1) are fixed by multiple screws passing through the threaded holes (10) and the second threaded holes (0002).

9. A radiation convection terminal device according to claim 1, characterized in that, A filter screen (5) is provided between the return air vent (6) and the placement cavity (11).

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