A warming stove with multi-stage catalytic combustion function
By employing a sleeve and multi-layered catalyst plates in the hand warmer, the problems of fuel vapor escape and incomplete combustion are solved, achieving efficient fuel utilization and reduction of TVOC.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN XUDIAN SWITCH CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional hand warmers suffer from severe fuel vapor escape, resulting in low fuel utilization and increased TVOC emissions. Insufficient oxygen intake also leads to incomplete combustion.
It adopts a unique sleeve and multi-layer catalyst installation structure design. The inner side of the sleeve is equipped with multiple layers of catalyst sheets to form a chimney effect, increase the amount of air entering, and improve the combustion efficiency through the catalytic combustion reaction of the multi-layer catalyst sheets.
It effectively reduces fuel vapor escape, improves fuel combustion efficiency, reduces TVOC emissions, and achieves higher fuel utilization and more complete combustion.
Smart Images
Figure CN224302190U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of hand warmers, specifically relating to a hand warmer with multi-stage catalytic combustion function. Background Technology
[0002] A hand warmer, also known as a pocket warmer, is a small everyday item placed in one's pocket for warmth. Commonly used materials include copper, copper alloys, iron, and zinc alloys. Its core component is a catalyst, which oxidizes the oil, generating heat without an open flame. It can be used normally even in cold regions down to -40°C. Hand warmers are characterized by their small size, portability, and long operating time; a single refill (12-30ml) typically lasts 12-36 hours.
[0003] Despite the numerous advantages of hand warmers, traditional hand warmer structures can only accommodate one catalyst, allowing a significant amount of fuel vapor to escape through the gaps in the catalyst structure. This results in low fuel combustion efficiency, fuel waste, and TVOC emissions. Furthermore, the traditional catalyst installation method in hand warmers often results in insufficient oxygen entering the catalyst, leading to incomplete catalytic combustion and the direct release of excessive intermediate products or fuel vapor, further contributing to low fuel efficiency and TVOC emissions. Therefore, overcoming these technical problems and shortcomings is a key issue that needs to be addressed. Utility Model Content
[0004] The purpose of this invention is to overcome the defects in the prior art and realize a warm stove with multi-stage catalytic combustion function. The warm stove adopts a unique sleeve and multi-layer catalyst installation structure design, which can effectively reduce the escape of fuel vapor, improve the combustion efficiency and utilization rate of fuel, and reduce TVOC emissions.
[0005] To achieve the above-mentioned objectives, the technical solution of this utility model is: a warming stove with multi-stage catalytic combustion function, comprising a stove body, a stove cover, and a detachable burner head. The stove body is hollow, the stove cover is fastened to the top of the stove body, a catalyst layer is detachably disposed inside the burner head, and a sleeve is fixedly disposed on the inner side of the top of the stove cover. When the stove body and stove cover are fastened together, the sleeve is positioned corresponding to the burner head. At least one layer of catalyst layer is detachably disposed on the lower inner side of the sleeve. Ventilation holes are provided on the stove cover corresponding to the cross-sectional position of the sleeve.
[0006] Furthermore, the inner ring size of the sleeve is larger than the outer ring size of the burner head, and when the furnace body and furnace cover are engaged, the bottom of the sleeve is fitted around the outside of the burner head. Of course, a preferred embodiment is that the bottom of the sleeve tightly abuts against the top surface of the furnace body, thus isolating the inner cavity of the sleeve from the outer space of the sleeve.
[0007] Another approach involves the following design: with the furnace body and furnace cover engaged, the bottom end of the sleeve and the top end of the furnace head are spaced apart along the height of the furnace body. In other words, the bottom end of the sleeve and the top end of the furnace head do not overlap or nest along the height of the furnace body.
[0008] Furthermore, limiting protrusions are correspondingly provided on the front and rear inner sidewalls of the sleeve, and the catalyst sheet is engaged between the limiting protrusions to achieve limiting and fixing of the catalyst sheet.
[0009] Furthermore, the number of catalyst sheets inside the sleeve is set to 1-3 layers.
[0010] As a preferred option, the number of catalyst sheets inside the sleeve is set to 2 layers, which can ensure the effect while minimizing the cost of use.
[0011] Furthermore, the burner head is detachably fitted onto the liquid inlet of the furnace body, and a catalyst sheet is detachably installed inside the burner head.
[0012] Compared with the prior art, the warm stove with multi-stage catalytic combustion function of this utility model has at least the following beneficial effects:
[0013] The wicker stove of this utility model has a sleeve fixedly installed on the inner side of the top of the stove cover. At least one layer of catalyst sheet is detachably installed on the lower part of the inner side of the sleeve. Combined with another layer of catalyst sheet inside the stove head, the wicker stove of this utility model has at least two layers of catalyst sheet.
[0014] When in use, the catalyst layer in the bottom burner head is ignited first. The heat generated by the catalyst layer in the burner head heats the air and the escaped fuel vapor, which moves upward. When it reaches the upper catalyst layer, a catalytic combustion reaction will occur again on the upper catalyst layer. At the same time, the sleeve setting makes the structure have a certain chimney effect, which will greatly increase the amount of air entering the catalyst layer, ultimately achieving the purpose of improving fuel combustion efficiency and reducing TVOC emissions. Attached Figure Description
[0015] Figure 1 This is a partial exploded cross-sectional view of Embodiment 1 of the warm stove with multi-stage catalytic combustion function of this utility model;
[0016] Figure 2 This is a partial cross-sectional view of the assembly structure of Embodiment 1 of the warm stove with multi-stage catalytic combustion function of this utility model;
[0017] Figure 3 This is a partial cross-sectional view of the exploded structure of Embodiment 2 of the warm stove with multi-stage catalytic combustion function of this utility model;
[0018] Figure 4 This is a partial cross-sectional view of the assembly structure of Embodiment 2 of the warming stove with multi-stage catalytic combustion function of this utility model.
[0019] In the diagram: 1-furnace body, 101 liquid inlet;
[0020] 2-Furnace cover, 3-Furnace head, 4-Catalyst layer, 5-Sleeve, 6-Ventilation hole, 7-Limiting protrusion. Detailed Implementation
[0021] The following description, in conjunction with the accompanying drawings and specific embodiments, provides a more detailed account of the warming stove with multi-stage catalytic combustion function of this utility model.
[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model. Example 1
[0023] This embodiment discloses a hand warmer with multi-stage catalytic combustion. The hand warmer employs a unique sleeve and multi-layer catalytic installation structure design, which effectively reduces fuel vapor escape, improves fuel combustion efficiency and utilization, and reduces TVOC emissions. Specifically, see... Figure 1-2 The furnace mainly comprises a furnace body 1, a furnace cover 2, and a detachable burner head 3. The furnace body 1 is hollow, and the furnace cover 2 is fastened to the top of the furnace body 1. The burner head 3 is detachably fitted onto the liquid inlet 101 of the furnace body 1, and a detachable catalyst layer 4 is installed inside the burner head 3. The difference from conventional reheating furnaces is that a sleeve 5 is fixedly installed on the inner side of the top of the furnace cover 2. When the furnace body 1 and furnace cover 2 are fastened, the sleeve 5 is positioned corresponding to the burner head 3. Ventilation holes 6 are provided on the furnace cover 2 corresponding to the cross-sectional position of the sleeve 5. The sleeve 5 forms a chimney-like structure, increasing the air intake and thus ensuring more complete combustion.
[0024] In this embodiment, see Figure 1 The lower inner side of the sleeve 5 is detachably provided with two layers of catalyst sheets 4 to prevent fuel vapor passing through the bottom catalyst sheet layer 4 from escaping directly, thereby improving the fuel combustion efficiency. With two layers of catalyst sheets 4 inside the sleeve 5, plus one layer of catalyst sheets 4 inside the burner head 3, a total of three layers are provided, ensuring effectiveness while minimizing operating costs.
[0025] To achieve the detachable fixation of catalyst layer 4, see [link / reference]. Figure 1 Alternatively, in configuration 2, limiting protrusions 7 are integrally provided on the front and rear inner sidewalls of the sleeve 5, and the catalyst sheet 4 is engaged between the limiting protrusions 7 to achieve limiting and fixing of the catalyst sheet 4. The limiting protrusions 7 can be implemented by integrally punching and bending inward. Of course, other structures can also be used to achieve detachable fixing of the catalyst sheet. The fixing method of the catalyst sheet is not the inventive point of this invention. Other fixing methods should still be considered as not exceeding the protection scope of this utility model.
[0026] As one implementation method, refer to Figure 2 The inner ring size of the sleeve 5 is larger than the outer ring size of the burner head 3, and when the furnace body 1 and the furnace cover 2 are engaged, the bottom of the sleeve 5 is fitted around the outside of the burner head 3. Furthermore, in this embodiment, the bottom of the sleeve 5 tightly abuts against the top surface of the furnace body 1, isolating the inner cavity of the sleeve 5 from the outer space of the sleeve 5, thereby increasing the chimney effect and improving the usability of the hand warmer. Example 2
[0027] The similarities to Example 1 will not be repeated here; the differences are as follows: See Figure 3 and Figure 4 Another approach employs the following design: with the furnace body 1 and furnace cover 2 engaged, the bottom end of the sleeve 5 and the top end of the burner head 3 are spaced apart along the height direction of the furnace body 1. That is, the bottom end of the sleeve 5 and the top end of the burner head 3 do not overlap or nest along the height direction of the furnace body 1. The length of the sleeve 5 is significantly shorter than that of the sleeve 5 in Embodiment 1, resulting in lower manufacturing costs while maintaining the same performance.
[0028] It should be noted that, in actual implementation, the structure depicted in the accompanying drawings is not a fixed or unchanging embodiment. The components of the embodiments of this invention described and shown in these drawings can typically be arranged and designed in various different configurations. Furthermore, the accompanying drawings and abstract drawings are merely illustrative and do not represent the specific structure or actual quantity in a concrete implementation.
[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation on quantity. Terms such as "comprising" or "including" mean that the element or component preceding the word encompasses the element or component listed following the word and its equivalents, without excluding other elements or components. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
[0030] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed by the present invention without exceeding the protection scope of the present invention.
Claims
1. A warming stove with multi-stage catalytic combustion function, comprising a stove body, a stove cover, and a detachable burner head, wherein the stove body is hollow, the stove cover is fastened to the top of the stove body, and a detachable catalyst layer is disposed inside the burner head, characterized in that: A sleeve is fixedly installed on the top inner side of the furnace cover. When the furnace body and furnace cover are fastened together, the sleeve is positioned corresponding to the furnace head. At least one layer of catalyst sheet is detachably installed on the lower inner side of the sleeve. Ventilation holes are provided on the furnace cover corresponding to the cross-sectional position of the sleeve.
2. The warm stove with multi-stage catalytic combustion function according to claim 1, characterized in that: The inner ring size of the sleeve is larger than the outer ring size of the burner head, and when the furnace body and furnace cover are fastened together, the bottom of the sleeve is fitted around the outside of the burner head.
3. The warm stove with multi-stage catalytic combustion function according to claim 1, characterized in that: With the furnace body and furnace cover engaged, the bottom end of the sleeve and the top end of the furnace head are spaced apart along the height direction of the furnace body.
4. The warm stove with multi-stage catalytic combustion function according to claim 2 or 3, characterized in that: Limiting protrusions are provided on the front and rear inner sidewalls of the sleeve, and the catalyst sheet is engaged between the limiting protrusions to achieve limiting and fixing of the catalyst sheet.
5. The warm stove with multi-stage catalytic combustion function according to claim 4, characterized in that: The number of catalyst sheets inside the sleeve is set to 1-3 layers.
6. The warm stove with multi-stage catalytic combustion function according to claim 5, characterized in that: The number of catalyst sheets inside the sleeve is set to 2.
7. The warm stove with multi-stage catalytic combustion function according to any one of claims 1-3, characterized in that: The burner head is detachably fitted onto the liquid inlet of the furnace body, and a catalyst sheet is detachably installed inside the burner head.