Bed warmer

Abstract

This application relates to a quilt warmer, which includes a main body, a heating unit, and an air guiding unit. The main body has an air outlet and an air inlet, and an air duct is formed between the air inlet and the air outlet to guide airflow. A fan is installed in the air duct to draw outside airflow from the air inlet to the air outlet for discharge. The heating unit is installed in the main body, and at least a portion of the heating area of ​​the heating unit is located in the part of the air duct between the air outlet and the air inlet, for heating the flowing air. The air guiding unit has multiple air guide holes arranged in a honeycomb structure, and the air guiding unit is located in the part of the air duct between the air inlet and the air inlet, so that outside airflow entering from the air inlet flows only through the multiple air guide holes to the air inlet of the fan. Based on the design of the air guiding unit, this quilt warmer can reduce turbulence flowing into the fan, thereby significantly reducing noise.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a quilt warmer. Background Technology

[0002] Bedding and clothing are prone to mites, bacteria, and viruses due to damp weather, leading to unpleasant odors. These mites, bacteria, and viruses can harm the skin and even pose a serious threat to human health. To address this, some bedding warmers have appeared on the market. These warmers heat cold air to create hot air that is then blown out. When needed, users can use these warmers to heat and dry bedding or clothing, keeping it dry and reducing the growth of mites, bacteria, and viruses. In humid areas or during cold seasons, warming the bedding with a warmer provides a comfortable and warm sleeping environment. However, bedding warmers typically have the drawback of being quite noisy during use. Summary of the Invention

[0003] Therefore, it is necessary to provide a quieter quilt warmer to address the problem of excessive noise in existing quilt warmers.

[0004] This application provides a quilt warmer, comprising: The main body is provided with an air outlet and an air inlet, and an air duct is formed between the air inlet and the air outlet to guide airflow. A fan is provided in the air duct to draw external airflow from the air inlet to the air outlet for discharge. A heating unit is installed on the main body, and at least part of the heating area of ​​the heating unit is located in a portion of the air duct between the air outlet of the fan and the air outlet, for heating the air flowing through it; The airflow guiding unit is provided with multiple air guide holes arranged in a honeycomb structure, and the airflow guiding unit is located in part of the air duct between the air inlet end of the fan and the air inlet, so that the external airflow flowing in from the air inlet flows to the air inlet end of the fan only through the multiple air guide holes.

[0005] In one embodiment, the quilt warmer further includes a plurality of guide vanes, which are disposed within the air duct and located on the side of the guide unit away from the fan; Multiple guide vanes are spaced apart along the width or height of the air duct to divide the portion of the air duct into multiple guide air ducts, which are used to guide the incoming airflow to the guide unit.

[0006] In one embodiment, the guide vane has guide slopes at both the inlet and outlet ends.

[0007] In one embodiment, the quilt warmer is further provided with a movable sleeve fitted on the main body, the movable sleeve being able to slide relative to the main body, and the free end of the movable sleeve having an opening through which the airflow blown by the fan flows to the outside. The outer wall of the main body is provided with an installation groove, and a flexible sealing element is embedded in the installation groove. The sealing element elastically abuts against the inner wall of the movable sleeve.

[0008] In one embodiment, the main body includes a shell, the shell includes a first section, and the fan and the heating unit are both disposed in the first section; the shell also includes a second section, the second section is disposed on one side of the first section, and the air outlet is provided at the end of the second section away from the first section; wherein, the cross-sectional area of ​​the second section gradually decreases along the flow direction of the airflow.

[0009] In one embodiment, the mounting groove and the seal are provided at the connection between the first segment and the second segment.

[0010] In one embodiment, the main body further includes a mounting shell, and the outer shell is fitted onto the mounting shell; The mounting housing includes a diameter section and a conical section connected together. The heating unit is located within the diameter section, and the conical section is located on the side of the diameter section away from the fan. The cross-sectional area of ​​the conical section gradually decreases along the airflow direction.

[0011] In one embodiment, the outer wall of the movable sleeve is provided with a plurality of protrusions spaced circumferentially.

[0012] In one embodiment, the opening of the movable sleeve is provided with a flow guide grille.

[0013] In one embodiment, the air outlet is provided with a guide grille.

[0014] In one embodiment, the main body includes an outer shell and a mounting shell, the outer shell being fitted onto the mounting shell, the mounting shell being hollow inside and open on both sides, and the heating unit being disposed inside the mounting shell; The mounting housing has a heat-insulating gap between at least a portion of the outer wall of the heating unit and the inner wall of the outer shell.

[0015] In one embodiment, the inner wall of the mounting housing is provided with a first protrusion and a second protrusion spaced apart along the axial direction of the mounting housing, and the heating unit is disposed between the first protrusion and the second protrusion. The first protrusion and the second protrusion respectively abut against the heating unit to limit the heating unit in the axial direction of the mounting housing.

[0016] In one embodiment, the heating unit includes a heating element and heat-conducting components disposed on both sides of the heating element. Each heat-conducting component includes a plurality of heat-conducting sheets spaced apart, and each heat-conducting sheet abuts against the inner wall of the mounting shell. The inner wall of the mounting shell is also provided with a limiting portion, which extends along the axial direction of the mounting shell and is located between two heat-conducting sheets to restrict the rotation of the heating unit.

[0017] The aforementioned quilt warmer incorporates a flow guiding unit between the air inlet and the fan inlet. This ensures that external airflow entering from the inlet can only flow through multiple guide holes in the flow guiding unit to the fan inlet. By guiding the external airflow from the inlet along a predetermined direction, the turbulent flow is transformed into multiple smooth airflows, reducing the probability of turbulence entering the fan and thus reducing noise caused by turbulence. Furthermore, the honeycomb structure of the flow guiding unit effectively diverts the external airflow entering from the inlet, resulting in a more uniform airflow distribution. This further ensures that the airflow to all parts of the fan is more even, reducing the possibility of excessive noise caused by high concentration of airflow in certain areas of the fan. Therefore, this quilt warmer, based on the flow guiding unit design, can significantly reduce noise. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a quilt warmer without a movable sleeve in one embodiment of this application.

[0019] Figure 2 for Figure 1 Enlarged view of circle A in the middle.

[0020] Figure 3 This is a schematic diagram of the structure of a quilt warmer according to one embodiment of this application; Figure 4 This is a schematic diagram of the heating unit in one embodiment of this application; Figure 5 This is a schematic diagram of the structure in one embodiment of the present application, showing the movable sleeve extending relative to the main body; Figure 6 This is a first cross-sectional schematic diagram of a quilt warmer according to an embodiment of this application; Figure 7 for Figure 6 Enlarged view of circle B in the middle; Figure 8 for Figure 6 Enlarged view of the C-circle; Figure 9 for Figure 6 Enlarged view of the middle D circle; Figure 10 This is a second cross-sectional schematic diagram of a quilt warmer according to an embodiment of this application; Figure 11This is a schematic diagram illustrating the fit between the slide and the limiting rib in one embodiment of this application; Figure 12 This is a first-view structural diagram of the air inlet shroud and the main body after being separated in one embodiment of this application; Figure 13 This is a second-view structural diagram of the air inlet shroud after it has been separated from the main body in one embodiment of this application; Figure 14 This is a schematic diagram of the air inlet shroud in one embodiment of this application; Figure 15 This is a perspective view of a quilt warmer according to one embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 1. Main body; 11. Air outlet; 12. Air duct; 13. Outer shell; 131. First section; 132. Second section; 14. Mounting shell; 141. Diameter section; 142. Conical section; 143. First protrusion; 144. Second protrusion; 15. Insulation gap; 16. Limiting protrusion; 17. Slide groove; 18. Air inlet; 191. Fixing groove; 192. Mounting groove; 193. First end; 194. Second end; 195. Transition groove; 2. Fan; 3. Air guide unit; 31. Air guide hole; 32. Connector; 33. Air guide vane; 4. Air guide plate; 41. Air guide slope; 42. Air guide duct; 43. Air inlet side; 44. Air outlet side; 45. Air guide surface; 5. Heating unit 51. Heating element; 52. Heat-conducting component; 521. Heat-conducting element; 6. Movable sleeve; 61. Opening; 62. Protrusion; 63. Limiting step; 631. Step slope; 64. Sleeve protrusion; 65. Limiting rib; 66. Cylinder body; 661. Snap-fit ​​protrusion; 662. Protrusion slope; 663. Snap-fit ​​positioning surface; 664. Positioning protrusion; 67. Air outlet ring; 671. Positioning groove; 68. Limiting sleeve; 681. Outer extension; 682. Snap-fit ​​groove; 683. Groove inner slope; 69. Free end; 71. Sealing element; 72. Air guide grille; 73. Retaining ring; 74. Main control board; 75. Ozone generator; 76. Air inlet hood; 761. Buckle; 77. Power cord. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0023] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0028] like Figure 1 , Figure 2 and Figure 12 As shown, an embodiment of this application provides a quilt warmer including a main body 1, a heating unit 5, and a flow guiding unit 3. The main body 1 is provided with an air outlet 11 and an air inlet 18, and an air duct 12 is formed between the air inlet 18 and the air outlet 11 to guide airflow. A fan 2 is provided in the air duct 12 to draw external airflow from the air inlet 18 to the air outlet 11 for discharge. The heating unit 5 is installed on the main body 1, and at least a portion of the heating area of ​​the heating unit 5 is located in the portion of the air duct 12 between the air outlet end of the fan 2 and the air outlet 11. This portion of the heating area is used to heat the air flowing through it. The flow guiding unit 3 is provided with a plurality of air guide holes 31 arranged in a honeycomb structure, and the flow guiding unit 3 is located in the portion of the air duct 12 between the air inlet end of the fan 2 and the air inlet 18, so that the external airflow flowing in from the air inlet 18 only flows to the air inlet end of the fan 2 through the plurality of air guide holes 31. The quilt warmer has a flow guiding unit 3 between the air inlet of the fan 2 and the air inlet 18, so that the external airflow flowing in from the air inlet 18 can only flow to the air inlet of the fan 2 through the multiple air guide holes 31 of the flow guiding unit 3. Thus, the quilt warmer provided in this embodiment uses the multiple air guide holes 31 on the flow guiding unit 3 to guide the external airflow flowing in from the air inlet 18 to flow orderly to the air inlet of the fan 2 in a set direction, that is, to change the turbulent flow into multiple smooth airflows, reducing the probability of turbulent flow flowing into the fan 2, thereby reducing the noise caused by turbulence; and the honeycomb structure of the flow guiding unit 3 has a diversion effect on the external airflow flowing in from the air inlet 18, making the airflow distribution more uniform, so that the airflow flowing to all parts of the fan 2 is also more uniform, reducing the situation where the airflow is too concentrated in a local area of ​​the fan 2 and causing a lot of noise; thus, the quilt warmer based on the design of the flow guiding unit 3 can reduce noise to a large extent.

[0029] like Figure 2 As shown, in some embodiments, the flow guiding unit 3 includes an annular connector 32, the connector 32 having multiple air guide vanes 33 inside, the multiple air guide vanes 33 being interconnected and dividing the inner cavity of the connector 32 into multiple air guide holes 31. The inner wall of the main body 1 is provided with a fixing groove 191, and the connector 32 is embedded in the fixing groove 191.

[0030] In some embodiments, the air outlet area of ​​the air guide unit 3 is equal to or the area difference between the air inlet end of the fan 2 is within a preset range. The airflow flowing out through the air guide unit 3 can enter the fan 2 at a uniform flow rate, avoiding local turbulence caused by sudden contraction (airflow acceleration) or expansion (airflow deceleration) of the cross section, and further reducing the probability of noise caused by turbulence.

[0031] like Figure 1 and Figure 2 As shown, in some embodiments, the quilt warmer also includes multiple guide plates 4, which are disposed within the air duct 12 and located on the side of the guide unit 3 away from the fan 2. The multiple guide plates 4 are spaced apart along the width or height of the air duct 12 to divide their respective portions of the air duct 12 into multiple guide air ducts 42. The guide air ducts 42 are used to guide the incoming airflow to the guide unit 3. Outside air flowing in from the air inlet 18 first flows into each guide air duct 42, then flows into the guide unit 3, and finally flows to the fan 2. Each guide air duct 42 also guides and diverts the flowing air, separating turbulent airflow into multiple smooth airflows, allowing the air to pass orderly between the air inlet 18 and the fan 2, reducing turbulence, and thus reducing noise caused by turbulence colliding with the inner wall of the main body 1.

[0032] It should be noted that for fan 2 and guide unit 3, when the airflow flows directly in a direction parallel to the direction from the inlet to the outlet, it can reduce the turbulent airflow caused by changes in airflow direction. For example... Figure 2 As shown, multiple air guide plates 4 are spaced apart in the width or height direction of the air duct 12. The extension direction of each separated guide air duct 42 is parallel to the axial direction of the main body 1. That is, the airflow from the guide air duct 42 flows directly to the guide unit 3 without significant change in angle. Therefore, in this embodiment, the guide air duct 42 also has the function of changing the airflow direction. That is, regardless of whether the air inlet 18 is located at the end or side wall of the main body 1, and whether the airflow has an inclined angle with the axial direction of the main body 1 when entering the air duct inside the main body 1, after passing through the guide air duct 42, the airflow direction will be changed to be parallel to the direction from the air inlet end to the air outlet end of the fan 2. This facilitates the setting of the air inlet 18 and can reduce turbulence and noise.

[0033] like Figure 2 As shown, in some embodiments, the guide plate 4 is provided with a guide slope 41 at both ends along the air inlet side 43 and the air outlet side 44, that is, the guide plate 4 is provided with a guide slope 41 at both ends along the airflow direction.

[0034] It should be noted that conventional deflectors are plate-shaped components with adjacent surfaces connected at 90°, resulting in angular structures at the connection points. Due to the inertia and viscosity of the fluid, the airflow cannot change direction instantaneously at right-angle corners, leading to separation zones at these corners and causing localized turbulence. The design of this guide slope 41 eliminates the angular structures at the ends of the deflector 4, replacing them with a gently sloping guide slope 41. This reduces turbulence and noise caused by the airflow contacting the angular structures as it flows through the deflector 4.

[0035] like Figure 2 As shown, in one embodiment, the guide plate 4 includes two opposing guide surfaces 45 in a direction perpendicular to the airflow direction, and the aforementioned guide slope 41 is provided at the ends of at least one guide surface 45 on the air inlet side and the air outlet side.

[0036] Optionally, both guide surfaces 45 are provided with the aforementioned guide slope 41, which has the same effect as the previous embodiment, and will not be described in detail here.

[0037] like Figure 5 , Figure 6 and Figure 9 As shown, in some embodiments, the quilt warmer is further provided with a movable sleeve 6 fitted on the main body 1. The movable sleeve 6 can slide relative to the main body 1, and the free end 69 of the movable sleeve 6 is provided with an opening 61. The airflow blown by the fan 2 flows to the outside through the opening 61. The outer wall of the main body 1 is provided with an installation groove 192. A flexible sealing element 71 is embedded in the installation groove 192. The sealing element 71 elastically abuts against the inner wall of the movable sleeve 6.

[0038] In this embodiment, by providing a movable sleeve 6 outside the main body 1, the quilt warmer can be in a retracted state (e.g., Figure 1 (as shown in the diagram) and elongated state (as shown in the diagram) Figure 5The device has two operating states (as shown) to match different application scenarios and usage needs. For example, when drying larger quilts or other mattresses, the movable sleeve 6 can extend relative to the main body 1, increasing the overall length of the quilt warmer and allowing the opening 61 of the movable sleeve 6 to reach deeper into the quilt. Since the opening 61 of the movable sleeve 6 is connected to the air outlet 11 of the main body 1, the hot air blown out from the air outlet 11 of the main body 1 can also flow to deeper into the quilt through the movable sleeve 6 and the opening 61. This facilitates drying and heating of the deeper parts of the quilt without frequently adjusting the shape of the quilt, thus improving drying efficiency. For smaller quilts or mattresses, the movable sleeve can be retracted relative to the main body 1 and adjusted to a storage state, which is also convenient to operate. In other words, the quilt warmer provided in this embodiment can adjust its length according to different application scenarios to adapt to different usage needs. Furthermore, after use, the movable sleeve 6 is retracted relative to the main body 1, which shortens the overall length of the quilt warmer, making it occupy less space and easier to store; and ensures that the length of the quilt warmer does not increase due to the addition of the movable sleeve 6 when it is not in operation.

[0039] Additionally, it should be noted that when the device is in its stored state, considering that some of the airflow blown out from the air outlet 11 may backflow, since the gap between the movable sleeve 6 and the main body 1 is relatively narrow, if this backflowing airflow enters the gap between the main body 1 and the movable sleeve 6, noise will be generated when the airflow collides with the inner wall of the main body 1 and the movable sleeve 6.

[0040] In this embodiment, the quilt warmer uses a flexible sealing element 71 to block the gap between the movable sleeve 6 and the main body 1, thus preventing wind from entering the gap between the movable sleeve 6 and the main body 1 and generating noise, thereby achieving the effect of noise reduction.

[0041] like Figure 3 As shown, in some embodiments, a plurality of protrusions 62 are spaced circumferentially on the outer wall of the movable sleeve 6. The design of the plurality of protrusions 62 increases the heat dissipation area of ​​the outer wall of the movable sleeve 6, facilitating rapid heat dissipation, and also increases the surface roughness of the movable sleeve 6, providing an anti-slip effect. In addition, the plurality of protrusions 62 also enhance the structural strength of the movable sleeve 6.

[0042] In some embodiments, such as Figure 6 , Figure 9 and Figure 15As shown, a flow guide grille 72 is provided at the opening 61 of the movable sleeve 6. The flow guide grille 72 is provided with multiple ventilation holes, which has the function of guiding and reducing noise of the airflow passing through the opening 61. The principle is the same as that of the flow guide unit 3, and will not be described in detail here. In addition, the flow guide grille 72 has the function of blocking external substances, reducing the possibility of external debris entering the movable sleeve 6.

[0043] In some embodiments, a flow guide grille (not shown in the figure) may also be provided at the air outlet 11. The flow guide grille is also provided with multiple ventilation openings, which has the function of guiding and reducing noise of the airflow passing through the air outlet 11. The principle is the same as that of the flow guide unit 3, and will not be described in detail here. In addition, the flow guide grille has the function of blocking external debris, reducing the entry of external debris into the main body 1 through the air outlet 11.

[0044] like Figure 3 and Figure 9 As shown, in some embodiments, the main body 1 includes a shell 13, which includes a first section 131, where the fan 2 and the heating unit 5 are both disposed. The shell 13 also includes a second section 132, which is disposed on one side of the first section 131, and an air outlet 11 is provided at the end of the second section 132 away from the first section 131. The cross-sectional area of ​​the second section 132 gradually decreases along the direction of airflow, and the second section 132 has a converging effect on the airflow, allowing the airflow to flow out at a higher speed and reach deeper into the quilt, thereby facilitating heating and drying of deeper areas of the quilt. In some embodiments, a mounting groove 192 and a sealing element 71 are provided at the connection between the first section 131 and the second section 132. As can be seen from the foregoing description, when the airflow passes through the opening 61 of the movable sleeve 6, backflow may occur. The connection between the first section 131 and the second section 132 is close to the air outlet 11. The sealing member 71 is used to enhance the sealing between the connection and the movable sleeve 6, so as to prevent the airflow blown out of the air outlet 11 from backflowing along the second section 132 and entering the narrow gap between the connection and the movable sleeve 6, thereby reducing the noise generated therefrom.

[0045] In some embodiments, the seal 71 is a silicone sealant.

[0046] like Figure 9 As shown, in some embodiments, the inner wall of the end of the movable sleeve 6 with the opening 61 is provided with a sleeve protrusion 64. When the movable sleeve 6 retracts to the set position relative to the main body 1, the sleeve protrusion 64 abuts against the outer wall of the second section 132 of the outer shell 13 to restrict the movable sleeve 6 from continuing to move in the retraction direction relative to the main body 1.

[0047] like Figure 3As shown, in some embodiments, the main body 1 further includes a mounting shell 14, with the outer shell 13 fitted onto the mounting shell 14. The mounting shell 14 includes a connected diameter section 141 and a conical section 142. The heating unit 5 is disposed within the diameter section 141, and the conical section 142 is disposed on the side of the diameter section 141 away from the fan 2. The cross-sectional area of ​​the conical section 142 gradually decreases along the airflow direction. The conical section 142 has a converging effect on the airflow, allowing the airflow to flow out at a higher speed, enabling the airflow to reach deeper into the quilt, thereby facilitating heating and drying of deeper areas of the quilt.

[0048] In some embodiments, the mounting housing 14 is hollow inside and open on both sides, and the heating unit 5 is disposed inside the mounting housing 14; wherein, as Figure 8 As shown, at least a portion of the outer wall of the heating unit 5 in the mounting housing 14 has a heat-insulating gap 15 between it and the inner wall of the outer shell 13. Some of the heat generated by the heating unit 5 is transferred to the mounting housing 14, but because there is a heat-insulating gap 15 between the mounting housing 14 and the outer shell 13, and because air has a low thermal conductivity, only a small portion of the heat is conducted from the mounting housing 14 to the outer shell 13, so that the temperature of the outer shell 13 will not be too high, and thus will not cause burns to the hands when the person holds the outer shell 13.

[0049] like Figure 6 As shown, in some embodiments, the inner wall of the mounting shell 14 is provided with a first protrusion 143 and a second protrusion 144 spaced apart along the axial direction of the mounting shell 14. The heating unit 5 is disposed between the first protrusion 143 and the second protrusion 144. The first protrusion 143 and the second protrusion 144 respectively abut against the heating unit 5 to limit the heating unit 5 in the axial direction of the mounting shell 14, which can prevent the heating unit 5 from shaking in the axial direction of the mounting shell 14 during use and improve the safety of use.

[0050] like Figure 4 As shown, in some embodiments, the heating unit 5 includes a heating element 51 and heat-conducting components 52 disposed on both sides of the heating element 51. Each heat-conducting component 52 includes a plurality of heat-conducting elements 521 spaced apart, and each heat-conducting element 521 abuts against the inner wall of the mounting shell 14. A limiting part is also provided on the inner wall of the mounting shell 14, extending along the axial direction of the mounting shell 14 and located between two heat-conducting elements 521 to restrict the rotation of the heating unit 5. This design fully considers the structural characteristics of the heating unit 5 itself. Based on a simple design, namely the limiting part located between two heat-conducting elements 521, the rotation of the heating unit 5 can be restricted, thus improving the safety of use.

[0051] In some embodiments, the thermally conductive component 52 is an aluminum component.

[0052] In some embodiments, the heating element 51 employs a PTC element, which stands for Positive Temperature Coefficient Thermistor. Based on the characteristics of the PTC element, without a complex temperature control system, the heating efficiency of the heating element 51 decreases as the temperature rises, thereby reducing the risk of fire caused by excessive heating efficiency of the heating element 51 and improving the safety of the quilt warmer.

[0053] like Figures 6 to 8 As shown, in some embodiments, a limiting protrusion 16 is provided on the outer wall of the main body 1, and a limiting step 63 is provided inside the movable sleeve 6. The limiting protrusion 16 is located on the side of the limiting step 63 away from the air inlet 18 of the main body 1. When the movable sleeve 6 extends to a set length relative to the main body 1, the limiting step 63 abuts against the limiting protrusion 16 to prevent the movable sleeve 6 from dislodging from the main body 1.

[0054] like Figure 11 As shown, in some embodiments, the main body 1 is provided with a sliding groove 17, and the movable sleeve 6 is provided with a limiting rib 65; the sliding groove 17 extends along the direction of extension and retraction of the movable sleeve 6 relative to the main body 1, and the limiting rib 65 is embedded in the sliding groove 17. During the extension and retraction of the movable sleeve 6 relative to the main body 1, the limiting rib 65 slides along the sliding groove 17 to restrict the circumferential rotation of the movable sleeve 6 relative to the main body 1. In other embodiments, the sliding groove 17 is provided on the movable sleeve 6, and the limiting rib 65 is provided on the main body 1.

[0055] In some embodiments, the two outer sidewalls of the main body 1 are provided with sliding grooves 17, and the two inner sidewalls of the movable sleeve 6 are provided with limiting ribs 65, with the two limiting ribs 65 respectively embedded in the two sliding grooves 17.

[0056] like Figures 6 to 9As shown, in some embodiments, the main body 1 is cylindrical in shape, and the movable sleeve 6 is cylindrical in shape. The movable sleeve 6 includes a cylindrical body 66 sleeved on the outside of the main body 1, an air outlet ring 67 fixed to one end of the cylindrical body 66, and a limiting sleeve 68 fixed to the other end of the cylindrical body 66. A limiting step 63 is provided on the limiting sleeve 68, and the limiting sleeve 68 has an extension 681 outside the limiting step 63. A snap-fit ​​groove 682 is formed between the extension 681 and the limiting step 63. The opening 61 of the snap-fit ​​groove 682 faces the cylindrical body 66, and a snap-fit ​​protrusion 661 is provided at the other end of the cylindrical body 66. The snap-fit ​​protrusion 661 is embedded in the snap-fit ​​groove 682. The limiting step 63 is located inside the cylindrical body 66 and is higher than the inner surface of the cylindrical body 66, forming a stepped structure. The other end of the cylinder 66 is provided with a snap-fit ​​positioning surface 663, which abuts against the end face of the extension portion 681. The inner wall of the snap-fit ​​groove 682 is provided with an inner slope 683, and the snap-fit ​​protrusion 661 is provided with a raised slope 662. During the process of the snap-fit ​​protrusion 661 embedding into the snap-fit ​​groove 682, the raised slope 662 acts as a guide, reducing the likelihood of the snap-fit ​​protrusion 661 abutting against the extension portion 681, which would otherwise prevent the snap-fit ​​protrusion 661 from smoothly embedding into the snap-fit ​​groove 682. Furthermore, as the snap-fit ​​protrusion 661 penetrates deeper into the snap-fit ​​groove 682, the inner slope 683 guides the snap-fit ​​protrusion 661 to embed further into the snap-fit ​​groove 682, reducing the likelihood of the snap-fit ​​protrusion 661 abutting against the inner wall of the snap-fit ​​groove 682, which would otherwise prevent the snap-fit ​​protrusion 661 from being properly embedded. The main body 1 is provided with a retaining ring 73. When the movable sleeve 6 retracts to a set position relative to the main body 1, the limiting sleeve 68 will abut against the retaining ring 73 to restrict the movable sleeve 6 from continuing to slide relative to the main body 1 in the retraction direction.

[0057] like Figures 6 to 8 As shown, in some embodiments, during assembly, the first end 193 of the main body 1 can be inserted into the cylinder 66 from the other end, and then the limiting sleeve 68 is fixed to the other end of the cylinder 66. As the limiting sleeve 68 approaches the cylinder 66, the snap-fit ​​protrusion 661 will embed into the snap-fit ​​groove 682 until the snap-fit ​​positioning surface 663 abuts against the outer extension 681. At this time, the limiting step 63 is fitted inside the cylinder 66. During use, when the movable sleeve 6 extends relative to the main body 1 along its central axis, the limiting step 63 abuts against the limiting protrusion 16 on the outer wall of the main body 1 to restrict the movable sleeve 6 from further extending relative to the main body 1. After the limiting sleeve 68 is installed in place, the retaining ring 73 can be installed from the second end 194 of the main body 1 to a set position on the main body 1.

[0058] like Figure 6 and Figure 7As shown, in some embodiments, the end of the limiting step 63 is provided with a stepped inclined surface 631. During the process of assembling the limiting sleeve 68 with the other end of the cylinder 66 and fitting the limiting step 63 into the cylinder 66, the stepped inclined surface 631 can play a guiding role, so that the limiting step 63 can be smoothly fitted into the cylinder 66.

[0059] like Figure 6 and Figure 9 As shown, in some embodiments, the air outlet ring 67 has an opening 61, and the end of the air outlet ring 67 facing the cylinder 66 is provided with a positioning groove 671. The end of the cylinder 66 is provided with a positioning protrusion 664, which is embedded in the positioning groove 671, so as to avoid the air outlet ring 67 from shifting relative to the cylinder 66 by utilizing the cooperation between the positioning protrusion 664 and the positioning groove 671; in addition, the sleeve protrusion 64 is provided at one end of the cylinder 66.

[0060] like Figure 1 , Figure 10 and Figure 12 As shown, in some embodiments, the second end 194 of the main body 1 is connected to the power cord 77. To avoid the power cord 77 and for ease of use, the air inlet 18 is set on the side wall of the second end 194 of the main body 1, and the air duct 12 extends along the central axis of the main body 1. When the air flows into the air duct 12 from the air inlet 18, the airflow direction is inclined relative to the air duct 12, which can easily form turbulence. The multiple guide plates 4 and the guide unit 3 will guide the air to flow orderly along the air duct 12, reducing turbulence.

[0061] In one embodiment, such as Figure 6 As shown, the main body 1 also includes a main control board 74 and an ozone generator 75. The ozone generated by the ozone generator 75 has extremely strong oxidizing power, capable of directly destroying the cell structure of microorganisms, causing them to rapidly inactivate. It is effective against various microorganisms such as bacteria, viruses, fungi, and spores. Furthermore, the oxidation reaction is completed quickly, and the sterilization speed is typically faster than chlorine-based agents. In addition, ozone decomposes into oxygen on its own, producing no harmful chemical residues. In some embodiments, the ozone generator 75 converts oxygen into ozone through high-voltage discharge or ultraviolet irradiation. Its working principle is as follows: using energy to decompose oxygen molecules into oxygen atoms, which then combine with undecomposed oxygen to generate ozone. The principle of the ozone generator 75 generating ozone through high-voltage discharge is as follows: corona discharge is generated through a high-voltage electric field to ionize oxygen, which then recombines into ozone.

[0062] like Figures 12 to 14As shown, in some embodiments, the second end 194 of the main body 1 is provided with an air inlet cover 76, the air inlet cover 76 is provided with a buckle 761, and the second end 194 of the main body 1 is provided with a transition groove 195, the transition groove 195 is provided with a slot. The user inserts the buckle 761 of the air inlet cover 76 into the transition groove 195 and rotates the air inlet cover 76 to engage the buckle 761 into the slot, thus installing the air inlet cover 76 on the second end 194 of the main body 1. When needed, the air inlet cover 76 is rotated in the opposite direction to disengage the buckle 761 from the slot and from the transition groove 195, thereby removing the air inlet cover 76 from the main body 1. This achieves the installation and removal of the air inlet cover 76. In some embodiments, the user rotates the air inlet cover 76 to loosen and pull it out, thereby cleaning foreign objects and impurities from the air inlet screen, facilitating daily cleaning and maintenance of the quilt warmer.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A quilt warmer, characterized in that, The quilt warmer includes: The main body is provided with an air outlet and an air inlet, and an air duct is formed between the air inlet and the air outlet to guide airflow. A fan is provided in the air duct to draw external airflow from the air inlet to the air outlet for discharge. A heating unit is installed on the main body, and at least part of the heating area of ​​the heating unit is located in a portion of the air duct between the air outlet of the fan and the air outlet, for heating the air flowing through it; The airflow guiding unit is provided with multiple air guide holes arranged in a honeycomb structure, and the airflow guiding unit is located in part of the air duct between the air inlet end of the fan and the air inlet, so that the external airflow flowing in from the air inlet flows to the air inlet end of the fan only through the multiple air guide holes.

2. The quilt warmer according to claim 1, characterized in that, The quilt warmer also includes multiple guide plates, which are disposed in the air duct and located on the side of the guide unit away from the fan; Multiple guide vanes are spaced apart along the width or height of the air duct to divide the portion of the air duct into multiple guide air ducts, which are used to guide the incoming airflow to the guide unit.

3. The quilt warmer according to claim 2, characterized in that, The guide plate has guide slopes at both the inlet and outlet sides.

4. The quilt warmer according to claim 1, characterized in that, The quilt warmer also has a movable sleeve fitted onto the main body. The movable sleeve can slide relative to the main body, and the free end of the movable sleeve has an opening through which the airflow blown by the fan flows to the outside. The outer wall of the main body is provided with an installation groove, and a flexible sealing element is embedded in the installation groove. The sealing element elastically abuts against the inner wall of the movable sleeve.

5. The quilt warmer according to claim 4, characterized in that, The main body includes an outer shell, which includes a first section, in which the fan and the heating unit are both disposed; the outer shell also includes a second section, which is disposed on one side of the first section, and the air outlet is provided at the end of the second section away from the first section; wherein, the cross-sectional area of ​​the second section gradually decreases along the direction of airflow.

6. The quilt warmer according to claim 5, characterized in that, The mounting groove and the sealing element are provided at the connection between the first segment and the second segment.

7. The quilt warmer according to claim 5, characterized in that, The main body also includes a mounting shell, and the outer shell is fitted onto the mounting shell; The mounting housing includes a diameter section and a conical section connected together. The heating unit is located within the diameter section, and the conical section is located on the side of the diameter section away from the fan. The cross-sectional area of ​​the conical section gradually decreases along the airflow direction.

8. The quilt warmer according to claim 4, characterized in that, The outer wall of the movable sleeve is provided with multiple protrusions spaced circumferentially.

9. The quilt warmer according to claim 4, characterized in that, The opening of the movable sleeve is provided with a flow guide grille.

10. The quilt warmer according to claim 1, characterized in that, The air outlet is equipped with a guide grille.

11. The quilt warmer according to claim 1, characterized in that, The main body includes an outer shell and a mounting shell. The outer shell is fitted onto the mounting shell. The mounting shell is hollow inside and open on both sides. The heating unit is disposed inside the mounting shell. The mounting housing has a heat-insulating gap between at least a portion of the outer wall of the heating unit and the inner wall of the outer shell.

12. The quilt warmer according to claim 11, characterized in that, The inner wall of the mounting housing is provided with a first protrusion and a second protrusion spaced apart along the axial direction of the mounting housing. The heating unit is disposed between the first protrusion and the second protrusion. The first protrusion and the second protrusion abut against the heating unit to limit the heating unit in the axial direction of the mounting housing.

13. The quilt warmer according to claim 11, characterized in that, The heating unit includes a heating element and heat-conducting components disposed on both sides of the heating element. Each heat-conducting component includes multiple heat-conducting elements spaced apart, and each heat-conducting element abuts against the inner wall of the mounting shell. The inner wall of the mounting shell is also provided with a limiting part, which extends along the axial direction of the mounting shell and is located between two heat-conducting elements to restrict the rotation of the heating unit.

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