Dual-zone temperature control freeze-proof air valve

Abstract

The utility model relates to a kind of dual-domain temperature control freeze-proof air valve, comprising: valve frame and heating assembly, the both sides of the valve frame are provided with gear box, the interface side of the valve frame is provided with sealing strip;The heating assembly includes first heat-insulating layer, second heat-insulating layer and electric heating film, the first heat-insulating layer and second heat-insulating layer are set in the both sides of the gear box, first electric heating belt and second electric heating belt are respectively set between the first heat-insulating layer and second heat-insulating layer and the gear box;The electric heating film is set close to the valve frame, and the electric heating film is set in the side of the valve frame away from sealing strip.The utility model wherein the freeze-proof of air valve includes two parts, wherein first electric heating belt and second electric heating belt heat gear box, improve the temperature of gear box, avoid gear damage, affect the normal use of air valve;Electric heating film generates heat transfer to sealing strip, heating softening is carried out to sealing strip, prevent sealing strip hardening, guarantee the sealing effect of air valve.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, and in particular to a dual-domain temperature-controlled antifreeze air valve. Background Technology

[0002] An AHU (Air Handling Unit) is a key component in a central air conditioning system used to process air (heating, cooling, humidifying, dehumidifying, filtering, etc.) and deliver the processed air to various areas. Within an AHU, the air valve is a crucial component for regulating airflow; its function is integral to the entire air handling process, directly impacting the unit's operating efficiency, indoor comfort, and system safety.

[0003] In existing technology, the opening and closing of the air valve is achieved by driving the blade shaft to rotate through multiple gears, thereby realizing the synchronous opening and closing of multiple blades. However, when the air valve is used in extreme low temperature environments (temperatures below -35°C), the gears will become brittle due to the low temperature, and gear damage will lead to jamming, which will seriously affect the normal operation of the air valve. Secondly, in extremely cold weather, the valve body sealing strip hardens, resulting in an air leakage rate of more than 3%, which will reduce the sealing performance of the air valve. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the defects in the prior art where the drive gear of the air valve is easily damaged and the sealing strip hardens in extremely cold weather, resulting in the air valve not being able to be used normally and the air valve having poor sealing performance.

[0005] To solve the above-mentioned technical problems, this utility model provides a dual-domain temperature control antifreeze air valve, comprising: A valve frame, with gearboxes on both sides and a sealing strip on the interface side of the valve frame; The heating assembly includes a first insulation layer, a second insulation layer, and an electric heating film. The first and second insulation layers are disposed on both sides of the gearbox. A first electric heating strip and a second electric heating strip are respectively disposed between the first and second insulation layers and the gearbox. The electric heating film is disposed in close contact with the valve frame and is disposed on the side of the valve frame away from the sealing strip.

[0006] In one embodiment of the present invention, the first insulation layer includes a stainless steel layer and a first filling layer that are bonded together. The first filling layer is disposed close to the first electric heating band, and a first heat-equalizing layer is disposed between the first filling layer and the first electric heating band.

[0007] In one embodiment of the present invention, the second insulation layer includes a glass fiber layer and a second filling layer that are bonded together. The second filling layer is disposed close to the second electric heating band, and a second heat-equalizing layer is disposed between the second filling layer and the second electric heating band.

[0008] In one embodiment of this utility model, the materials of the first heat-spreading layer and the second heat-spreading layer are both copper foil.

[0009] In one embodiment of this utility model, the first electric heating band and the second electric heating band are distributed in an S-shape on the surface of the gearbox.

[0010] In one embodiment of this utility model, the sealing strip is embedded with an elastic element, and the material of the elastic element is a shape memory alloy.

[0011] In one embodiment of this utility model, the gearbox is provided with a plurality of meshing gears, and oil microcapsules are provided at the root of the gear teeth.

[0012] In one embodiment of the present invention, a drive shaft is inserted inside one of the gears.

[0013] In one embodiment of this invention, the gearbox is filled with nitrogen gas.

[0014] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The present invention discloses a dual-domain temperature-controlled antifreeze air valve. The antifreeze function of the air valve in this invention includes two parts: a first electric heating belt and a second electric heating belt heat the gearbox, increasing the temperature of the gearbox and preventing gear damage that would affect the normal use of the air valve; the electric heating film generates heat and transfers it to the sealing strip, heating and softening the sealing strip to prevent it from hardening and ensuring the sealing effect of the air valve. Attached Figure Description

[0015] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Cross-sectional view of the internal structure of the valve frame; Figure 3 for Figure 2 A partial structural diagram at point A in the middle; Figure 4 for Figure 1 Cross-sectional view of the internal structure of the heating element; Figure 5 for Figure 4 A schematic diagram of the local structure at point B; Figure 6 for Figure 4 A schematic diagram showing the distribution of the first electric heating element; Figure 7 for Figure 3 Schematic diagram of the intermediate gearbox; Figure 8 for Figure 7 A schematic diagram of the local structure at point C; Explanation of reference numerals in the accompanying drawings: 1. Valve frame; 2. Heating assembly; 11. Gearbox; 12. Blade; 13. Sealing strip; 21. First insulation layer; 22. Second insulation layer; 23. First electric heating band; 24. Second electric heating band; 25. First heat spreader layer; 26. Second heat spreader layer; 27. Electric heating film; 111. Gear; 112. Drive shaft; 113. Oil microcapsule; 131. Elastic element; 211. Stainless steel layer; 212. First filling layer; 221. Glass fiber layer; 222. Second filling layer. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0017] Reference Figures 1-5 As shown, this utility model discloses a dual-domain temperature-controlled antifreeze air valve, comprising: Valve frame 1, with gearboxes 11 on both sides of the valve frame 1, and a sealing strip 13 on the interface side of the valve frame 1; Heating assembly 2 includes a first insulation layer 21, a second insulation layer 22, and an electric heating film 27. The first insulation layer 21 and the second insulation layer 22 are disposed on both sides of the gearbox 11. A first electric heating strip 23 and a second electric heating strip 24 are respectively disposed between the first insulation layer 21 and the second insulation layer 22 and the gearbox 11. The electric heating film 27 is disposed in close contact with the valve frame 1 and is disposed on the side of the valve frame 1 away from the sealing strip 13.

[0018] In this invention, the gearboxes 11 on both sides of the valve frame 1 are used to drive the opening and closing of the entire air valve. The interface side of the valve frame 1 is used to connect the air duct and equipment. A sealing strip 13 is provided on the interface side of the valve frame 1. During actual installation, the sealing strip 13 is pressed between the valve frame 1 and the connecting parts to ensure the sealing of the air valve connection. The antifreeze of the air valve in this invention includes two parts: the first electric heating band 23 and the second electric heating band 24 heat the gearbox 11 to increase the temperature of the gearbox 11 and prevent damage to the gears 111, which would affect the normal use of the air valve; the electric heating film 27 generates heat and transfers it to the sealing strip 13 to heat and soften the sealing strip 13, preventing it from hardening and ensuring the sealing effect of the air valve.

[0019] Reference Figures 2-5As shown, the heating component 2 isolates the temperature on both sides of the gearbox 11 through the first insulation layer 21 and the second insulation layer 22, reducing the temperature exchange between the gearbox 11 and the outside environment. Secondly, a first electric heating band 23 and a second electric heating band 24 are respectively provided between the first insulation layer 21 and the second insulation layer 22 and the gearbox 11. These heating bands heat both sides of the gearbox 11, increasing the internal temperature of the gearbox 11, preventing damage to the gear 111 from extreme low temperatures, ensuring the normal operation of the gear 111, and improving the reliability of the air valve. The electric heating film 27 is located on the side of the valve frame 1 away from the sealing strip 13. The heat generated by the electric heating film 27 is transferred to the sealing strip 13 through the valve frame 1, heating the sealing strip 13, preventing hardening under extreme low temperatures, and reducing air leakage. On the other hand, the other side of the electric heating film 27 can also transfer temperature to the gearbox 11, further ensuring the temperature of the gearbox 11.

[0020] As a preferred embodiment of this utility model, both the first electric heating band 23 and the second electric heating band 24 are nickel-chromium alloy resistance heating tapes. Specifically, the nickel-chromium alloy resistance heating tape is an electric heat tracing product that uses nickel-chromium alloy as the core heating element. Its main function is to convert electrical energy into heat energy to provide stable temperature compensation or anti-freezing insulation for the air valve. Secondly, the electric heating film 27 is a graphene heating film. The graphene heating film is a flexible heating product that uses graphene as the core heating element. It converts electrical energy into heat energy efficiently to heat the sealing strip 13, preventing the sealing strip 13 from hardening.

[0021] Furthermore, referring to Figure 4 As shown, the first insulation layer 21 includes a stainless steel layer 211 and a first filling layer 212 that are bonded together. The first filling layer 212 is disposed close to the first electric heating band 23, and a first heat-equalizing layer 25 is disposed between the first filling layer 212 and the first electric heating band 23. The second insulation layer 22 includes a glass fiber layer 221 and a second filling layer 222 that are bonded together. The second filling layer 222 is disposed close to the second electric heating band 24, and a second heat-equalizing layer 26 is disposed between the second filling layer 222 and the second electric heating band 24.

[0022] Specifically, both the first insulation layer 21 and the second insulation layer 22 are multi-layered structures. The first insulation layer 21 uses a 0.8mm stainless steel layer 211 as support, and a first filling layer 212 is disposed between the stainless steel layer 211 and the gearbox 11 to insulate against external low temperatures. Similarly, the second filling layer 222 includes a glass fiber layer 221 and a second filling layer 222 bonded together. The glass fiber layer 221 is disposed between the gearbox 11 and the valve frame 1, and the space between the glass fiber layer 221 and the gearbox 11 is filled with the second filling layer 222, which prevents ice from adhering to the valve frame 1 and insulates the temperature on one side of the valve body. As a preferred embodiment of this invention, both the first filling layer 212 and the second filling layer 222 are made of polyimide aerogel, which can suppress air convection, reduce temperature conduction, and weaken heat radiation.

[0023] Furthermore, both the first heat-spreading layer 25 and the second heat-spreading layer 26 are made of copper foil.

[0024] Specifically, in the actual assembly process, the first electric heating band 23 and the second electric heating band 24 are first attached to the surface of the gearbox 11, and then the first heat-spreading layer 25 and the second heat-spreading layer 26 are tightly wrapped around the outside of the first electric heating band 23 and the second electric heating band. In this utility model, copper foil is used as the heat-spreading layer. On the one hand, copper foil has strong plasticity and can cover all dead corners; on the other hand, copper foil can reflect the heat generated by the electric heating band and improve the heat preservation effect.

[0025] Furthermore, referring to Figure 6 As shown, the first electric heating band 23 and the second electric heating band 24 are distributed in an S-shape on the surface of the gearbox 11. Specifically, the S-shaped design can increase the distribution range of the first electric heating band 23 and the second electric heating band 24, thereby increasing the heating area.

[0026] Furthermore, referring to Figure 5 As shown, the sealing strip 13 is embedded with an elastic element 131, and the material of the elastic element 131 is a shape memory alloy.

[0027] Specifically, the elastic element 131 in this utility model is made of shape memory alloy. When the sealing strip 13 contracts in a low-temperature environment, the shape memory alloy elastic element 131 will stretch and actively squeeze the sealing surface to achieve dynamic compensation sealing and improve sealing performance. When the temperature recovers, the elastic element 131 will return to its initial state.

[0028] Furthermore, referring to Figures 7-8As shown, the gearbox 11 contains a plurality of meshing gears 111, and oil microcapsules 113 are provided at the root of the gears 111. The oil microcapsules 113 can release lubricating grease in low-temperature environments, reducing friction between the gears 111 and further ensuring the reliability of the gears 111 operation.

[0029] Furthermore, a plurality of blades 12 are provided between the valve frames 1, and the two ends of the blades 12 are connected to the gears 111.

[0030] Specifically, multiple gears 111 are arranged along the length of the gearbox 11. Any two adjacent gears 111 mesh with each other and rotate synchronously. A pair of gears 111 at both ends of each blade 12 controls the rotation of the blade 12. A drive shaft 112 passes through one of the gears 111. When the drive shaft 112 rotates, it drives each gear 111 to rotate, thereby realizing the synchronous rotation of multiple blades 12 and ultimately realizing the opening and closing control of the entire air valve.

[0031] Furthermore, the gearbox 11 is filled with nitrogen gas to prevent the gears 111 from being affected by moisture.

[0032] In summary, this utility model introduces a dual-domain temperature-controlled antifreeze air valve. The antifreeze function of the air valve in this utility model includes two parts: the first electric heating band 23 and the second electric heating band 24 heat the gearbox 11, increasing the temperature of the gearbox 11 and preventing damage to the gears 111, which would affect the normal use of the air valve; the electric heating film 27 generates heat and transfers it to the sealing strip 13, heating and softening the sealing strip 13 to prevent it from hardening and ensuring the sealing effect of the air valve.

[0033] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A dual-domain temperature-controlled antifreeze air valve, characterized in that, include: A valve frame, with gearboxes on both sides and a sealing strip on the interface side of the valve frame; The heating assembly includes a first insulation layer, a second insulation layer, and an electric heating film. The first and second insulation layers are disposed on both sides of the gearbox. A first electric heating strip and a second electric heating strip are respectively disposed between the first and second insulation layers and the gearbox. The electric heating film is disposed in close contact with the valve frame and is disposed on the side of the valve frame away from the sealing strip.

2. The dual-domain temperature-controlled antifreeze air valve according to claim 1, characterized in that: The first insulation layer includes a stainless steel layer and a first filler layer that are bonded together. The first filler layer is disposed close to the first electric heating band, and a first heat-equalizing layer is disposed between the first filler layer and the first electric heating band.

3. The dual-domain temperature-controlled antifreeze air valve according to claim 2, characterized in that: The second insulation layer includes a glass fiber layer and a second filling layer that are bonded together. The second filling layer is disposed close to the second electric heating band, and a second heat-equalizing layer is disposed between the second filling layer and the second electric heating band.

4. The dual-domain temperature-controlled antifreeze air valve according to claim 3, characterized in that: Both the first and second heat-spreading layers are made of copper foil.

5. The dual-domain temperature-controlled antifreeze air valve according to claim 1, characterized in that: The first and second electric heating bands are distributed in an S-shape on the surface of the gearbox.

6. The dual-domain temperature-controlled antifreeze air valve according to claim 1, characterized in that: The sealing strip is embedded with an elastic element, and the elastic element is made of shape memory alloy.

7. The dual-domain temperature-controlled antifreeze air valve according to claim 1, characterized in that: The gearbox contains multiple meshing gears, and oil microcapsules are disposed at the root of the gear teeth.

8. The dual-domain temperature-controlled antifreeze air valve according to claim 7, characterized in that: Multiple blades are arranged between the valve frames, and the two ends of the blades are connected to the gear.

9. The dual-domain temperature-controlled antifreeze air valve according to claim 7, characterized in that: One of the gears has a drive shaft running through it.

10. The dual-domain temperature-controlled antifreeze air valve according to claim 1, characterized in that: The gearbox is filled with nitrogen gas.

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