A double-head electric quilt-warming machine

Abstract

The utility model provides a kind of double-head electric blanket machine, including electric blanket machine main body, air outlet unit and heating unit, electric blanket machine main body includes fan unit suitable for conveying airflow, heating unit is set to electric blanket machine main body or air outlet unit, air outlet unit includes first air outlet unit and second air outlet unit, first air outlet unit is suitable for being rotatably connected in electric blanket machine main body around first pivot axle, second air outlet unit is suitable for being rotatably connected in electric blanket machine main body around second pivot axle;Air outlet unit has initial working position and at least one unfolding working position, in initial working position, first air outlet unit and second air outlet unit are arranged in parallel;In any unfolding working position, at least one of first air outlet unit and second air outlet unit deviates from initial working position.The utility model realizes the switching of "initial working position" and "unfolding working position" by the design rotatable first, second air outlet unit, supports multi-angle air supply in plane or space.

Description

Technical Field

[0001] This utility model belongs to the field of household appliance technology, and in particular relates to a double-headed quilt warmer. Background Technology

[0002] As a household appliance designed to improve the sleeping environment and dry fabrics, a quilt warmer, with its hot air delivery function, can quickly preheat quilts, dehumidify, and dry clothes / socks. It is widely used in humid climates, cold seasons, and by mothers, infants, and the elderly. To address the problems of "small heating area and low efficiency" in traditional single-outlet quilt warmers, existing technologies have seen innovative attempts with dual-outlet structures. For example, Chinese patent application number CN202123057679.2 discloses a dual-tube quilt warmer. This patent upgrades single-outlet to dual-outlet systems through a structural design where "an air guide device connects two telescopic ducts, each corresponding to both the air outlet and the air guide," expanding the heating area. It even allows for the simultaneous drying of multiple pairs of shoes and socks by using the U-shaped locking mechanism of the air guide, improving practicality to some extent. Simultaneously, its "detachable external telescopic duct" design reduces the volume of the air outlet, making it easy to carry and store. Furthermore, the detachable assembly of internal parts lowers future maintenance and replacement costs, providing a foundational approach for the development of dual-outlet quilt warmers.

[0003] However, after careful analysis and practice, the existing technical solution still has the following obvious defects: 1. Its dual air outlet path relies on the linear extension of the telescopic duct. The angle of the air outlet component and the air guide component cannot be actively adjusted. When facing quilts of different sizes, it cannot adapt to the wide or narrow heating needs by adjusting the air outlet angle. For irregular areas such as the corners of the quilt and parts of the mattress, the problem of "overheating in the direct hot air area and not covering the edge area" is likely to occur, resulting in poor heating uniformity. 2. The telescopic duct and the air outlet unit lack stable positioning. The telescopic duct is only fixed to the clip with bolts, and the air guide component has no angle locking function. In the quilt warming scenario, the duct is prone to displacement due to the weight of the quilt or slight vibration of the machine, causing the air outlet direction to deviate from the preset area. 3. The two telescopic ducts need to be manually stretched, fixed and angled separately, without a linkage mechanism. If the user needs to expand the coverage of the quilt, the position and angle of the two ducts must be adjusted one by one. The operation steps are cumbersome and it is difficult to ensure the symmetrical or uniform distribution of the dual air outlet paths, which further affects the heating uniformity. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a double-headed quilt warmer to meet the needs of users.

[0005] To achieve the above objectives, this utility model provides a double-headed quilt warmer, including...

[0006] The main body of the quilt warmer includes a fan unit suitable for conveying airflow;

[0007] An air outlet unit is adapted to connect to the fan unit and discharge hot air. The air outlet unit includes a first air outlet unit and a second air outlet unit. The first air outlet unit is adapted to be rotatably connected to the main body of the quilt warmer about a first pivot axis, and the second air outlet unit is adapted to be rotatably connected to the main body of the quilt warmer about a second pivot axis.

[0008] A heating unit adapted to heat airflow to form hot air, the heating unit being disposed in the main body of the quilt warmer or the air outlet unit;

[0009] The air outlet unit has an initial working position and at least one deployed working position. In the initial working position, the first air outlet unit and the second air outlet unit are arranged in parallel. In any of the deployed working positions, at least one of the first air outlet unit and the second air outlet unit is offset from the initial working position.

[0010] In the initial operating position, the first and second air outlet units are adjacent to or in contact with each other, resulting in a compact overall shape. In any deployed operating position, the relative spatial angle between the first and second air outlet units increases, thereby expanding the air supply coverage area.

[0011] As a preferred embodiment, the first pivot axis and the second pivot axis are parallel to each other, and the first air outlet unit and the second air outlet unit are constrained to rotate in the same plane. This is suitable for the scenario of "wide warm blanket in the plane" (such as a double blanket covering horizontally). The rotation trajectory of the first and second air outlet units is controllable, and the user can intuitively judge the air outlet coverage range, thus reducing the difficulty of operation.

[0012] Preferably, the first pivot axis and the second pivot axis are at an angle in space, the angle being 70° to 110°, allowing the first and second air outlet units to be deployed in a three-dimensional angle in space, such as the first air outlet unit tilting forward and the second air outlet unit tilting to the side, breaking through the limitation of air supply in a single plane and adapting to the "three-dimensional drying" scenario.

[0013] Preferably, a positioning mechanism is provided between the first air outlet unit and the main body of the quilt warmer, and / or a positioning mechanism is provided between the second air outlet unit and the main body of the quilt warmer, the positioning mechanism being configured to hold the first air outlet unit and / or the second air outlet unit in stages at one or more predetermined rotation angles.

[0014] Preferably, the positioning mechanism is configured to limit the absolute rotation range of the air outlet unit to between 10° and 30°.

[0015] Preferably, the positioning mechanism provides a single rotation step of 4° to 6°; and / or, the positioning mechanism provides an effective positioning count of 1 to 5 times.

[0016] Preferably, the positioning mechanism includes at least one of a ratchet mechanism or a ball mechanism.

[0017] Preferably, the pawl mechanism includes an elastic engaging pawl and an engaging portion with several grooves. The elastic engaging pawl is disposed in the first air outlet unit and / or the second air outlet unit, and the engaging portion is disposed in the body of the heater. The elastic engaging pawl can selectively engage into one of the grooves during the rotation of the first air outlet unit and / or the second air outlet unit to achieve positioning.

[0018] Preferably, the ball mechanism includes a ball structure and a positioning plate. The ball structure includes a steel ball and a spring adapted to press the steel ball. The positioning plate has a plurality of positioning recesses. The positioning plate is disposed on the main body of the quilt warmer. The ball structure is disposed on the first air outlet unit and / or the second air outlet unit. The steel ball can selectively fall into one of the positioning recesses during the rotation of the first air outlet unit and / or the second air outlet unit to achieve positioning.

[0019] It is understandable that the positions of the elastic engaging claw and the engaging part can be interchanged, as can the positions of the ball structure and the positioning plate.

[0020] Preferably, a linkage mechanism is provided between the first air outlet unit and the second air outlet unit, and the linkage mechanism is configured such that when one of the air outlet units is driven to rotate, the other air outlet unit rotates synchronously in the opposite direction.

[0021] Preferably, in the initial working position, the extension directions of the first air outlet unit and the second air outlet unit are both parallel to the length direction of the main body of the quilt warmer, and the first air outlet unit and the second air outlet unit are arranged adjacent to or in contact with each other; in the unfolded working position, the air outlet unit unfolds in a V-shape in the top view plane, and the extension directions of the first air outlet unit and the second air outlet unit are respectively inclined outward relative to the extension direction of the main body of the quilt warmer.

[0022] Preferably, the linkage mechanism includes at least one of a gear meshing mechanism or a synchronous belt drive mechanism.

[0023] Preferably, the gear meshing mechanism includes a first gear and a second gear that mesh with each other. The first gear is located at the root of the first air outlet unit and rotates with it, and the second gear is located at the root of the second air outlet unit and rotates with it. The end of the first air outlet unit and the second air outlet unit that connects to the main body of the quilt warmer is considered as its root.

[0024] Preferably, the synchronous belt drive mechanism includes a first pulley, a second pulley, and a synchronous belt tensioned and engaged between the first pulley and the second pulley. The first pulley can rotate synchronously and coaxially with the first air outlet unit, and the second pulley can rotate synchronously and coaxially with the second air outlet unit.

[0025] Preferably, the dual-head quilt warmer further includes a Y-shaped flow path divider, comprising an inlet pipe suitable for connecting to the fan unit, a first outlet pipe suitable for connecting to the first outlet unit, and a second outlet pipe suitable for connecting to the second outlet unit. At least a portion of the flow path divider is made of a flexible material that allows elastic deformation. Further, the entire flow path divider is made of a flexible material, or the connection between the inlet pipe and the first and second outlet pipes is made of a flexible material. The flexible material design maintains a seal during rotation, ensuring flexible rotation of the first and second outlet units while reducing airflow leakage and heat loss. Simultaneously, the Y-shaped structure of the divider ensures even airflow distribution to the dual outlet units, avoiding uneven airflow with one strong and one weak outlet.

[0026] Preferably, the first air outlet unit has a first circumferential air outlet on its outer periphery, and a first outer frame is detachably fitted on the outer periphery of the first air outlet unit. The first outer frame is used to form a heat dissipation space around the first circumferential air outlet, and the orthographic projection profile of the first outer frame on a plane perpendicular to the length direction of the first air outlet unit is larger than the orthographic projection profile of the first air outlet unit.

[0027] Preferably, the second air outlet unit has a second circumferential air outlet formed on its outer periphery, and a second outer frame is detachably fitted on the outer periphery of the second air outlet unit. The second outer frame is used to form a heat dissipation space around the second circumferential air outlet, and the orthographic projection profile of the second outer frame on a plane perpendicular to the length direction of the second air outlet unit is larger than the orthographic projection profile of the second air outlet unit.

[0028] By setting up the first and second outer frames, a 5-10mm heat dissipation space is formed around the air outlet on the first and second sides, avoiding direct blockage of the air outlet by the fabric, controlling the local maximum temperature below 50℃, and eliminating the risk of overheating; at the same time, the outer frame is detachable, which makes it easy to clean the internal dust and extend the service life of the equipment.

[0029] Preferably, the first air outlet unit is equipped with a first heater, and the second air outlet unit is equipped with a second heater.

[0030] Preferably, the first outer frame is fixed to the first air outlet unit by a snap-fit ​​or elastic clamping method. The first outer frame is engaged and fixed to the first air outlet unit by multiple small protrusions and / or elastic claws on its inner wall. Similarly, the second outer frame is fixed to the second air outlet unit by a snap-fit ​​or elastic clamping method. The second outer frame is engaged and fixed to the second air outlet unit by multiple small protrusions and / or elastic claws on its inner wall, allowing for on-demand use; the frame can be used to prevent overheating when warming blankets, and removed to reduce volume when drying shoes and socks or for storage.

[0031] Preferably, the first air outlet unit includes a first housing adapted to define a first air outlet channel, the first housing having a first longitudinal air outlet and a first circumferential air outlet adapted to communicate with the first air outlet channel; the second air outlet unit includes a second housing adapted to define a second air outlet channel, the second housing having a second longitudinal air outlet and a second circumferential air outlet adapted to communicate with the second air outlet channel.

[0032] By designing a multi-directional air supply structure of "first longitudinal air outlet + first circumferential air outlet" and "second longitudinal air outlet + second circumferential air outlet" on the housing of the first and second air outlet units, and with the independent heating design of "first air outlet unit built with first heater and second air outlet unit built with second heater", the first and second air outlet units can work independently or in combination, thus adapting to a variety of usage scenarios.

[0033] Preferably, the main body of the quilt warmer includes a main housing that defines a main cavity adapted to house a fan unit. A portion of the first housing is adapted to extend into the main cavity, and a portion of the second housing is adapted to extend into the main cavity. The positioning mechanism is disposed between the main housing and the first housing and / or the second housing.

[0034] Preferably, the first housing includes a first longitudinal surface, the second housing includes a second longitudinal surface, the first longitudinal surface and the second longitudinal surface are arranged facing each other, and the gear meshing mechanism is disposed between the first longitudinal surface and the second longitudinal surface.

[0035] The beneficial effects of this utility model are:

[0036] 1. By designing rotatable first and second air outlet units, the "initial working position" and "expanded working position" can be switched, supporting multi-angle air supply in a plane or space, covering irregular areas such as the corners of the quilt and parts of the mattress, improving heating uniformity, and taking into account the storage needs of small spaces and the uniform heating needs of large quilts.

[0037] 2. By setting a positioning mechanism between the first and second air outlet units and the main body of the quilt warmer, it is ensured that the air outlet unit can be stably maintained at the preset angle after rotation, avoiding directional deviation caused by external force or the weight of the quilt during the quilt warming or drying process, and adapting to different scenarios such as "centralized air supply" and "wide-range heating".

[0038] 3. By setting a linkage mechanism between the first and second air outlet units, the two units can be driven to rotate synchronously in opposite directions in a single operation: the user only needs to push the first air outlet unit to rotate outward, and the second air outlet unit can be opened synchronously in the opposite direction through gear meshing or synchronous belt drive, and vice versa. The adjustment steps are simplified from "two operations" to "one operation", while ensuring the symmetrical distribution of the dual air outlet paths, improving adjustment efficiency and heating uniformity. Attached Figure Description

[0039] Figure 1 This is a structural schematic diagram of a double-headed quilt warmer provided by this utility model.

[0040] Figure 2 An exploded view of a double-headed quilt warmer provided by this utility model.

[0041] Figure 3 This is a cross-sectional schematic diagram of a double-headed quilt warmer provided by this utility model.

[0042] Figure 4 for Figure 3 An enlarged schematic diagram of region A in the middle.

[0043] Figure 5 for Figure 3 A magnified view of region B in the middle.

[0044] Figure 6 A schematic diagram of the structure of the first air outlet unit provided by this utility model.

[0045] Figure 7 This is a schematic diagram of the structure of the second air outlet unit provided by this utility model.

[0046] Figure 8 A schematic diagram of the structure of the second air outlet unit provided by this utility model (from another angle).

[0047] In the diagram: 100, main body of the blanket warmer; 101, main housing; 111, first pivot shaft; 112, second pivot shaft; 113, air inlet; 114, main cavity; 102, fan unit; 201, first air outlet unit; 211, first housing; 2111, first air outlet channel; 2112, first longitudinal surface; 2113, first longitudinal air outlet; 2114, first circumferential air outlet; 212, first heater; 213, first gear; 202, second air outlet. Unit; 221, second housing; 2211, second air outlet channel; 2212, second longitudinal surface; 2213, second longitudinal air outlet; 2214, second circumferential air outlet; 222, second heater; 223, second gear; 300, flow path divider; 301, first air outlet pipe; 302, second air outlet pipe; 303, air inlet pipe; 401, elastic meshing claw; 402, meshing part; 421, groove; 501, first outer frame; 502, second outer frame. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0050] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] like Figure 1-8As shown, a double-headed quilt warmer includes a quilt warmer body 100, an air outlet unit, a Y-shaped flow path divider 300, and a heating unit. The quilt warmer body 100 includes a main housing 101 and a fan unit 102. The main housing 101 defines a main cavity 114 adapted to house the fan unit 102 and an air inlet 113 adapted to connect the main cavity 114 to the external environment. The fan unit 102 is adapted to draw in cold air from the outside, form a directional airflow, and deliver it to the subsequent air outlet unit, providing a stable airflow power source for the entire device. The air outlet unit includes a first air outlet unit 201 and a second air outlet unit 202. The first air outlet unit 201 includes a first housing 211 adapted to define a first air outlet channel 2111, and the second air outlet unit 202 includes a second housing 221 adapted to define a second air outlet channel 2211. The flow path diverter 300 includes an inlet duct 303 adapted to connect to the fan unit 102, a first outlet duct 301 adapted to connect to the first outlet duct 2111, and a second outlet duct 302 adapted to connect to the first outlet duct 2111. The entire flow path diverter 300 is made of flexible material. Part of the first housing 211 is adapted to extend into the main cavity and is rotatably connected to the main housing 101 through a first pivot shaft 111, and part of the second housing 221 is adapted to extend into the main cavity and is rotatably connected to the main housing 101 through a second pivot shaft 112. The heating unit heats the cold air delivered by the fan unit 102, converting it into hot air at a preset temperature, typically 40-60°C, suitable for warming blankets and dehumidifying needs. The installation position can be flexibly selected according to the structural design. For example, centralized heating within the main body facilitates overall temperature control, while decentralized heating within the outlet unit enables differentiated temperature adjustment for the dual outlet paths. The heating unit includes a first heater 212 disposed inside the first air outlet unit 201 and a second heater 222 disposed inside the second air outlet unit 202.

[0052] In this embodiment, the first pivot shaft 111 and the second pivot shaft 112 are parallel to each other, and the first air outlet unit 201 and the second air outlet unit 202 are constrained to rotate in the same plane. Each air outlet unit has an initial working position and at least one extended working position. In the initial working position, the extension directions of both the first air outlet unit 201 and the second air outlet unit 202 are parallel to the length direction of the main body 100 of the quilt warmer. The first air outlet unit 201 and the second air outlet unit 202 are arranged adjacent to or in contact with each other, resulting in a compact overall shape. In the extended working position, at least one of the first air outlet unit 201 and the second air outlet unit 202 deviates from the initial working position, increasing the relative spatial angle between them and expanding the air supply coverage area.

[0053] In some other embodiments, the first pivot axis 111 and the second pivot axis 112 form an angle of 90° in space. The air outlet unit has an initial working position and at least one unfolded working position. In the initial working position, the first air outlet unit 201 and the second air outlet unit 202 are arranged in parallel. In any unfolded working position, the first air outlet unit 201 and the second air outlet unit 202 are allowed to unfold in space at a three-dimensional angle, such as the first air outlet unit 201 tilting forward and the second air outlet unit 202 tilting to the side, breaking through the limitation of air supply in a single plane and adapting to the "three-dimensional drying" scenario.

[0054] In this embodiment, a positioning mechanism is provided between the first air outlet unit 201 and the main body 100 of the quilt warmer, and a positioning mechanism is also provided between the second air outlet unit 202 and the main body 100 of the quilt warmer. More specifically, the positioning mechanism is located between the main housing 101 and the first housing 211 and the second housing 221. The positioning mechanism is configured to hold the first air outlet unit 201 and the second air outlet unit 202 in a stepped manner at multiple predetermined rotation angles. The positioning mechanism is configured to limit the absolute rotation range of the air outlet units to 15°, the single rotation step provided by the positioning mechanism is 5°, and the effective positioning number provided by the positioning mechanism is 3 times. The positioning mechanism includes a pawl mechanism, which includes an elastic engaging pawl 401 and an engaging portion 402 with several grooves 421. The elastic engaging pawl 401 is disposed in the first housing 211 and the second housing 221, and the engaging portion 402 is disposed in the main body of the heater. During the rotation of the first air outlet unit 201 or the second air outlet unit 202, the elastic engaging pawl 401 can be selectively engaged in one of the grooves 421 to achieve positioning.

[0055] In this embodiment, a linkage mechanism is provided between the first air outlet unit 201 and the second air outlet unit 202. The linkage mechanism is configured such that when one air outlet unit is driven to rotate, the other air outlet unit rotates synchronously in the opposite direction. The linkage mechanism includes a gear meshing mechanism, which includes a first gear 213 and a second gear 223 that mesh with each other. The first gear 213 is located at the root of the first air outlet unit 201 and rotates with it, and the second gear 223 is located at the root of the second air outlet unit 202 and rotates with it. The end of the first air outlet unit 201 and the second air outlet unit 202 that connects to the main body 100 of the quilt warmer is considered its root.

[0056] Furthermore, the first housing 211 includes a first longitudinal surface 2112, and the second housing 221 includes a second longitudinal surface 2212. The first longitudinal surface 2112 and the second longitudinal surface 2212 are arranged facing each other. The first gear 213 is disposed on the first longitudinal surface 2112, and the second gear 223 is disposed on the second longitudinal surface 2212.

[0057] In this embodiment, the rotation trajectories of the first air outlet unit 201 and the second air outlet unit 202 are controllable, allowing the user to intuitively judge the air outlet coverage area and reducing the difficulty of operation. In the unfolded working position, the air outlet units unfold in a V-shape in the top view plane, with the extension directions of the first air outlet unit 201 and the second air outlet unit 202 respectively inclined outward relative to the extension direction of the main body 100 of the quilt warmer.

[0058] In this embodiment, the first housing 211 has a first longitudinal air outlet 2113 and a first circumferential air outlet 2114 adapted to connect the first air outlet channel 2111. The second housing 221 has a second longitudinal air outlet 2213 and a second circumferential air outlet 2214 adapted to connect the second air outlet channel 2211. A first outer frame 501 is detachably fitted around the outer periphery of the first housing 211. The first outer frame 501 is used to form a heat dissipation space around the first circumferential air outlet 2114. The orthographic projection profile of the first outer frame 501 on a plane perpendicular to the length direction of the first air outlet unit 201 is larger than the orthographic projection profile of the first air outlet unit 201. A second outer frame 502 is detachably fitted around the outer periphery of the second housing 221. The second outer frame 502 is used to form a heat dissipation space around the second circumferential air outlet 2214. The orthographic projection profile of the second outer frame 502 on a plane perpendicular to the length direction of the second air outlet unit 202 is larger than the orthographic projection profile of the second air outlet unit 202.

[0059] Furthermore, the first outer frame 501 is fixed to the first housing 211 by elastic clamping. The second outer frame 502 is fixed to the second housing 221 by elastic clamping. By setting the first outer frame 501 and the second outer frame 502, an 8mm heat dissipation space is formed around the first circumferential air outlet 2114 and the second circumferential air outlet 2214, preventing fabric from directly blocking the air outlets, controlling the local maximum temperature below 50℃, and eliminating the risk of overheating; at the same time, the first and second outer frames are detachable, which facilitates cleaning of internal dust and extends the service life of the equipment.

[0060] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A double-headed quilt warmer, characterized in that, include The main body of the quilt warmer includes a fan unit suitable for conveying airflow; An air outlet unit is adapted to connect to the fan unit and discharge hot air. The air outlet unit includes a first air outlet unit and a second air outlet unit. The first air outlet unit is adapted to be rotatably connected to the main body of the quilt warmer about a first pivot axis, and the second air outlet unit is adapted to be rotatably connected to the main body of the quilt warmer about a second pivot axis. A heating unit adapted to heat airflow to form hot air, the heating unit being disposed in the main body of the quilt warmer or the air outlet unit; The air outlet unit has an initial working position and at least one deployed working position. In the initial working position, the first air outlet unit and the second air outlet unit are arranged in parallel. In any of the deployed working positions, at least one of the first air outlet unit and the second air outlet unit is offset from the initial working position.

2. A double-headed quilt warmer according to claim 1, characterized in that, The first pivot axis and the second pivot axis are parallel to each other, and the first air outlet unit and the second air outlet unit are constrained to rotate in the same plane.

3. A double-headed quilt warmer according to claim 2, characterized in that, A positioning mechanism is provided between the first air outlet unit and the main body of the quilt warmer, and / or a positioning mechanism is provided between the second air outlet unit and the main body of the quilt warmer. The positioning mechanism is configured to hold the first air outlet unit and / or the second air outlet unit in stages at one or more predetermined rotation angles.

4. A double-headed quilt warmer according to claim 3, characterized in that, The positioning mechanism is configured to limit the absolute rotation range of the air outlet unit to between 10° and 30°. The positioning mechanism provides a single rotation step range of 4° to 6°; and / or, the positioning mechanism provides an effective positioning count of 1 to 5 times.

5. A double-headed quilt warmer according to claim 4, characterized in that, The positioning mechanism includes at least one of a pawl mechanism or a spool mechanism, wherein: The pawl mechanism includes an elastic engaging pawl and an engaging portion with several grooves. The elastic engaging pawl is disposed on the first air outlet unit and / or the second air outlet unit, and the engaging portion is disposed on the body of the quilt warmer. The elastic engaging pawl can selectively engage into one of the grooves during the rotation of the first air outlet unit and / or the second air outlet unit to achieve positioning. The ball mechanism includes a ball structure and a positioning plate. The ball structure includes a steel ball and a spring adapted to press the steel ball. The positioning plate has a plurality of positioning recesses. The positioning plate is disposed on the main body of the quilt warmer. The ball structure is disposed on the first air outlet unit and / or the second air outlet unit. The steel ball can selectively fall into one of the positioning recesses during the rotation of the first air outlet unit and / or the second air outlet unit to achieve positioning.

6. A double-headed quilt warmer according to any one of claims 2-5, characterized in that, A linkage mechanism is provided between the first air outlet unit and the second air outlet unit. The linkage mechanism is configured such that when one of the air outlet units is driven to rotate, the other air outlet unit rotates synchronously in the opposite direction.

7. A double-headed quilt warmer according to claim 6, characterized in that, In the initial working position, the extension directions of the first air outlet unit and the second air outlet unit are both parallel to the length direction of the main body of the quilt warmer, and the first air outlet unit and the second air outlet unit are arranged adjacent to or in contact with each other. In the unfolded working position, the air outlet unit unfolds in a V-shape in the top view plane, and the extension direction of the first air outlet unit and the extension direction of the second air outlet unit are respectively inclined outward relative to the extension direction of the main body of the quilt warmer.

8. A double-headed quilt warmer according to claim 7, characterized in that, The linkage mechanism includes at least one of a gear meshing mechanism or a synchronous belt drive mechanism, wherein: The gear meshing mechanism includes a first gear and a second gear that mesh with each other. The first gear is disposed at the root of the first air outlet unit and rotates with it, and the second gear is disposed at the root of the second air outlet unit and rotates with it. The synchronous belt drive mechanism includes a first pulley, a second pulley, and a synchronous belt tensioned and engaged between the first pulley and the second pulley. The first pulley can rotate synchronously and coaxially with the first air outlet unit, and the second pulley can rotate synchronously and coaxially with the second air outlet unit.

9. A double-headed quilt warmer according to claim 1, characterized in that, It also includes a Y-shaped flow path divider, which includes an inlet pipe adapted to connect to the fan unit, a first outlet pipe adapted to connect to the first outlet unit, and a second outlet pipe adapted to connect to the second outlet unit. At least a portion of the flow path divider is made of a flexible material that allows elastic deformation.

10. A double-headed quilt warmer according to claim 1, characterized in that, The first air outlet unit has a first circumferential air outlet formed on its outer periphery. The first outer frame is detachably fitted on the outer periphery of the first air outlet unit. The first outer frame is used to form a heat dissipation space around the first circumferential air outlet. The orthographic projection profile of the first outer frame on a plane perpendicular to the length direction of the first air outlet unit is larger than the orthographic projection profile of the first air outlet unit. And / or, a second circumferential air outlet is formed on the outer periphery of the second air outlet unit, and a second outer frame is detachably fitted on the outer periphery of the second air outlet unit. The second outer frame is used to form a heat dissipation space around the second circumferential air outlet, and the orthographic projection profile of the second outer frame on a plane perpendicular to the length direction of the second air outlet unit is larger than the orthographic projection profile of the second air outlet unit.

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