Double fireproof air duct structure for sterilizer

Abstract

The utility model discloses a double fireproof air duct structure for a sterilizer, which belongs to the technical field of sterilizers and comprises an upper air duct, a lower air duct and a PTC (Positive Temperature Coefficient) heating body, the upper air duct and the lower air duct are respectively made of high-temperature-resistant materials and are fixedly connected with each other, and a left PTC support and a right PTC support are arranged on the PTC heating body. The left PTC support and the right PTC support are made of high-temperature-resistant materials respectively and located on the left side and the right side of the PTC heating body, and the PTC heating body is located between the upper air channel and the lower air channel through the left PTC support and the right PTC support. The left, right, upper and lower portions of the PTC heating body of the structure form double fireproof and heat insulation effects, the heat insulation effect is good, damage of high-temperature heat generated when the PTC heating body works to a product is effectively avoided, the service life of the product is prolonged, arrangement of a temperature sensor can be omitted, and therefore production cost is reduced, and production efficiency is improved. In addition, the upper and lower air ducts and the left and right PTC supports do not deform or generate toxic and irritant peculiar smell when the PTC heating body works, and the use experience of a user is not affected.

Description

Technical Field

[0001] This utility model relates to the technical field of sterilization machines for maternal and infant products, specifically a double fireproof air duct structure for a sterilization machine. Background Technology

[0002] In the existing technology, the heating air duct of sterilizers is mostly composed of two large plastic parts, which has a high manufacturing cost and poor heat insulation effect. The plastic is prone to deformation when heated, and may even catch fire.

[0003] To address this, relevant technical personnel have made improvements. For example, the utility model patent with Chinese patent number CN202222411785.4 discloses a duct component and a kitchenware sterilizer. The surface of its PTC heating element is provided with a temperature control component, which is a fuse and is electrically connected to the heating component. However, the fuse will increase production costs and is also prone to damage after long-term use, affecting the overall service life of the product.

[0004] For example, Chinese utility model patent CN202122952662.7 discloses a two-in-one sterilizer and formula maker using a silicone air duct. The outer wall of the PTC heating element is equipped with an air duct, which is a silicone component. That is, the silicone component wraps around the PTC heating element. In actual use, the silicone will melt due to the high temperature of the PTC heating element and produce a toxic and irritating odor, affecting the user experience.

[0005] Therefore, further improvements are necessary. Utility Model Content

[0006] The present invention aims to provide a double fireproof air duct structure for a sterilization machine to overcome the shortcomings of the prior art.

[0007] A dual fireproof air duct structure for a disinfection machine designed for this purpose includes an upper air duct, a lower air duct, and a PTC heating element. The upper air duct and the lower air duct are respectively made of high-temperature resistant materials and are fixedly connected to each other. The PTC heating element is provided with a left PTC bracket and a right PTC bracket. The left PTC bracket and the right PTC bracket are respectively made of high-temperature resistant materials and are positioned on the left and right sides of the PTC heating element. The PTC heating element is positioned between the upper air duct and the lower air duct through the left PTC bracket and the right PTC bracket.

[0008] The high-temperature melting points of the left PTC bracket and the right PTC bracket are higher than, lower than, or equal to the high-temperature melting points of the upper air duct and the lower air duct.

[0009] The left PTC bracket and the right PTC bracket may have the same or different high-temperature melting points, and the upper air duct and the lower air duct may have the same or different high-temperature melting points.

[0010] The PTC heating element is spaced apart from the upper and lower air ducts.

[0011] The left PTC bracket and the right PTC bracket are respectively provided with a sleeve part, and are respectively positioned on the left and right sides of the PTC heating element through the sleeve part.

[0012] The left PTC bracket and the right PTC bracket are also provided with perforated sections.

[0013] The upper or lower air duct is also provided with a lead port for wiring the PTC heating element.

[0014] The upper air duct and / or the lower air duct are provided with positioning grooves, and the PTC heating element is positioned on the positioning grooves by the left PTC bracket and the right PTC bracket.

[0015] An air duct cavity is formed between the upper air duct and the lower air duct. The upper air duct and / or the lower air duct are provided with positioning edges along the front-back direction of the air duct cavity, and positioning grooves are formed through the positioning edges. The positioning grooves are formed laterally in the air duct cavity. The PTC heating element is fixed in the upper air duct and the lower air duct by the left PTC bracket and the right PTC bracket.

[0016] The upper air duct and the lower air duct are fixed to each other by fasteners, screws, or ultrasonic welding, and the ends of the two form air inlets. A fan is connected to the air inlet, and an air outlet is provided on the upper air duct or the lower air duct.

[0017] This invention utilizes a left and right PTC bracket made of high-temperature resistant material to insulate the left and right sides of the PTC heating element. The PTC heating element is then positioned between an upper and lower air duct made of high-temperature resistant material using the left and right PTC brackets, thus creating a double fireproof and heat-insulating effect on the left, right, top, and bottom of the PTC heating element. This not only provides excellent heat insulation, effectively preventing damage to the product from the high temperature generated by the PTC heating element during operation and extending the product's lifespan, but also eliminates the need for a temperature sensor, thereby reducing production costs. Furthermore, the upper and lower air ducts, left and right PTC brackets will not deform or produce toxic or irritating odors when the PTC heating element is in operation, thus not affecting the user experience and demonstrating strong practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the assembly structure from another perspective of an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the assembly cross-sectional structure of an embodiment of the present invention.

[0021] Figure 4 for Figure 3 A magnified structural diagram at point A in the diagram.

[0022] Figure 5 This is a schematic diagram of the assembly cross-section structure from another perspective of an embodiment of the present invention.

[0023] Figure 6 This is an exploded structural diagram of an embodiment of the present invention.

[0024] Figure 7 This is an exploded structural diagram from another perspective of an embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the assembly structure of the downdraft and PTC heating element.

[0026] Figure 9 This is a schematic diagram of the assembly structure of the upper air duct and the PTC heating element.

[0027] Figure 10 This is a structural diagram of the left PTC support / right PTC support. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model 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 utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] See Figures 1-10The dual fireproof air duct structure used in the disinfection machine includes an upper air duct 1, a lower air duct 2, and a PTC heating element 3. The upper air duct 1 and the lower air duct 2 are made of high-temperature resistant materials and are fixedly connected to each other. The PTC heating element 3 is provided with a left PTC support 4 and a right PTC support 5. The left PTC support 4 and the right PTC support 5 are made of high-temperature resistant materials and are positioned on the left and right sides of the PTC heating element 3. The PTC heating element 3 is positioned between the upper air duct 1 and the lower air duct 2 through the left PTC support 4 and the right PTC support 5.

[0031] In this embodiment, the left PTC bracket 4 and right PTC bracket 5, made of high-temperature resistant material, insulate the left and right sides of the PTC heating element 3, respectively. The PTC heating element 3 is then positioned between the upper air duct 1 and the lower air duct 2, both made of high-temperature resistant material, using the left and right PTC brackets 4 and right PTC bracket 5. This creates a double fireproof and heat-insulating effect on the left, right, upper, and lower sides of the PTC heating element 3. Not only is the heat insulation effect good, effectively preventing damage to the product from the high temperature generated by the PTC heating element 3 during operation and extending the product's service life, but it also eliminates the need for a temperature sensor, thereby reducing production costs. Furthermore, the upper air duct 1, lower air duct 2, left PTC bracket 4, and right PTC bracket 5 will not deform or produce toxic or irritating odors when the PTC heating element 3 is working, thus not affecting the user experience and demonstrating strong practicality.

[0032] The high-temperature melting points of the left PTC bracket 4 and the right PTC bracket 5 are higher than, lower than, or equal to the high-temperature melting points of the upper air duct 1 and the lower air duct 2.

[0033] The high-temperature melting points of the left PTC bracket 4 and the right PTC bracket 5 may be the same or different, and the high-temperature melting points of the upper air duct 1 and the lower air duct 2 may be the same or different.

[0034] In this embodiment, the left PTC bracket 4 and the right PTC bracket 5 have the same high-temperature melting point, and the upper air duct 1 and the lower air duct 2 have the same high-temperature melting point. At the same time, the high-temperature melting points of the left PTC bracket 4 and the right PTC bracket 5 are higher than those of the upper air duct 1 and the lower air duct 2.

[0035] Specifically, the high-temperature melting points of the left PTC bracket 4 and the right PTC bracket 5 are above 280 degrees Celsius, and the high-temperature melting points of the upper air duct 1 and the lower air duct 2 are above 220 degrees Celsius. This allows the PTC heating element 3 to form an enclosure with increasing fire resistance levels on the left and right sides and up and down, thereby effectively insulating the PTC heating element 3 and ensuring that the heat generated by the PTC heating element 3 during operation is effectively confined between the left PTC bracket 4, the right PTC bracket 5, the upper air duct 1, and the lower air duct 2.

[0036] The PTC heating element 3 is positioned in a spaced manner with the upper air duct 1 and the lower air duct 2.

[0037] In this embodiment, the PTC heating element 3 is positioned with a left PTC bracket 4 and a right PTC bracket 5 on its left and right sides, respectively. At the same time, the left and right sides of the PTC heating element 3 are positioned between the upper air duct 1 and the lower air duct 2 through the left PTC bracket 4 and the right PTC bracket 5, respectively. Therefore, a certain gap can be formed between the periphery of the PTC heating element 3 and the upper air duct 1 and the lower air duct 2. This gap can isolate the heat generated by the PTC heating element 3 when it is working, thereby preventing the high temperature heat from spreading outside the upper air duct 1 and the lower air duct 2.

[0038] The left PTC bracket 4 and the right PTC bracket 5 are respectively provided with a socket 6, and are respectively positioned on the left and right sides of the PTC heating element 3 through the socket 6.

[0039] In this embodiment, the left PTC bracket 4 and the right PTC bracket 5 are positioned on the left and right sides of the PTC heating element 3 respectively through the sleeve part 6 during assembly, so as to improve the ease of assembly between the left PTC bracket 4, the right PTC bracket 5, and the PTC heating element 3.

[0040] The left PTC bracket 4 and the right PTC bracket 5 are also provided with perforated sections 7. The perforated sections 7 allow the heat generated by the PTC heating element 3 during operation to diffuse outward, reducing the problem of localized high temperature caused by heat accumulation.

[0041] The upper air duct 1 or the lower air duct 2 is also provided with a lead port 8 for wiring the PTC heating element 3.

[0042] Positioning grooves 9 are provided on the upper air duct 1 and / or the lower air duct 2, and the PTC heating element 3 is positioned on the positioning grooves 9 by the left PTC bracket 4 and the right PTC bracket 5.

[0043] In this embodiment, the lead-in port 8 is located on one side of the lower air duct 2 and corresponds to the positioning groove 9. The hollow part 7 is provided with two positive and negative terminals corresponding to the PTC heating element 3 and corresponds to the lead-in port 8. The terminal of the PTC heating element 3 passes through the hollow part 7 of the left PTC bracket 4 or the right PTC bracket 5 and extends out of the lower air duct 2 through the lead-in port 8 to facilitate the connection between the power cord and the PTC heating element 3. In addition, the upper air duct 1 and the lower air duct 2 are both provided with positioning grooves 9, thereby effectively positioning the left PTC bracket 4, the right PTC bracket 5, and the PTC heating element 3.

[0044] An air duct cavity 10 is formed between the upper air duct 1 and the lower air duct 2. The upper air duct 1 and / or the lower air duct 2 are respectively provided with positioning edges 11 along the front and rear directions of the air duct cavity 10, and positioning grooves 9 are formed through the positioning edges 11. The positioning grooves 9 are formed laterally in the air duct cavity 10. The PTC heating element 3 is fixed in the upper air duct 1 and the lower air duct 2 through the left PTC bracket 4 and the right PTC bracket 5.

[0045] In this embodiment, both the upper air duct 1 and the lower air duct 2 are provided with positioning edges 11 along the front and rear directions of the air duct cavity 10. The upper air duct 1 and the lower air duct 2 respectively form positioning grooves 9 through the front and rear positioning edges 11. The positioning grooves 9 extend laterally inside the air duct cavity 10 so that the PTC heating element 3 can be laterally positioned inside the air duct cavity 10, thereby allowing the air flowing inside the air duct cavity 10 to effectively pass through the PTC heating element 3 and be heated to generate high temperature.

[0046] The upper air duct 1 and the lower air duct 2 are fixed to each other by means of fasteners, screws, or ultrasonic welding, and the ends of the two form an air inlet 12. A fan 13 is connected to the air inlet 12, and an air outlet 14 is provided on the upper air duct 1 or the lower air duct 2.

[0047] In this embodiment, the outer periphery of the upper air duct 1 is provided with cards at intervals, and the cards are provided with buckle holes. The outer periphery of the lower air duct 2 is provided with buckles at intervals, and the buckles are fastened to the buckle holes to achieve mutual fixation between the upper air duct 1 and the lower air duct 2. This not only simplifies the structure but also facilitates the disassembly and maintenance of the upper air duct 1 and the lower air duct 2. The fan 13 is located at one end of the upper support 1 and the lower support 2 and is connected to the air inlet 12. The air outlet 14 is located at one end of the bottom surface of the lower air duct 2 and is away from the fan 13.

[0048] When the fan 13 is working, it draws air into the air duct cavity 10 through the air inlet 12. The air in the air duct cavity 10 is heated by the PTC heating element 3 and becomes high-temperature air, and is finally discharged from the air duct cavity 10 through the air outlet 14.

[0049] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A dual fireproof air duct structure for a sterilizer, comprising an upper air duct (1), a lower air duct (2), and a PTC heating element (3), characterized in that: The upper air duct (1) and the lower air duct (2) are made of high-temperature resistant materials and are fixedly connected to each other. The PTC heating element (3) is provided with a left PTC bracket (4) and a right PTC bracket (5). The left PTC bracket (4) and the right PTC bracket (5) are made of high-temperature resistant materials and are positioned on the left and right sides of the PTC heating element (3). The PTC heating element (3) is positioned between the upper air duct (1) and the lower air duct (2) through the left PTC bracket (4) and the right PTC bracket (5).

2. The double fireproof air duct structure for a disinfection machine according to claim 1, characterized in that: The high-temperature melting points of the left PTC bracket (4) and the right PTC bracket (5) are higher than, lower than, or equal to the high-temperature melting points of the upper air duct (1) and the lower air duct (2).

3. The double fireproof air duct structure for a disinfection machine according to claim 2, characterized in that: The high-temperature melting points of the left PTC bracket (4) and the right PTC bracket (5) are the same or different, and the high-temperature melting points of the upper air duct (1) and the lower air duct (2) are the same or different.

4. The double fireproof air duct structure for a disinfection machine according to claim 1, characterized in that: The PTC heating element (3) is surrounded by an intermittent space with the upper air duct (1) and the lower air duct (2).

5. The double fireproof air duct structure for a disinfection machine according to claim 1, characterized in that: The left PTC bracket (4) and the right PTC bracket (5) are respectively provided with a sleeve (6), and are respectively positioned on the left and right sides of the PTC heating element (3) through the sleeve (6).

6. The double fireproof air duct structure for a disinfection machine according to claim 5, characterized in that: The left PTC bracket (4) and the right PTC bracket (5) are also provided with perforated parts (7).

7. The double fireproof air duct structure for a disinfection machine according to claim 1, characterized in that: The upper air duct (1) or the lower air duct (2) is also provided with a lead port (8) for wiring the PTC heating element (3).

8. The double fireproof air duct structure for a disinfection machine according to claim 1, characterized in that: The upper air duct (1) and / or the lower air duct (2) are provided with positioning grooves (9), and the PTC heating element (3) is positioned on the positioning grooves (9) by the left PTC bracket (4) and the right PTC bracket (5).

9. The double fireproof air duct structure for a disinfection machine according to claim 8, characterized in that: A duct cavity (10) is formed between the upper air duct (1) and the lower air duct (2). The upper air duct (1) and / or the lower air duct (2) are provided with positioning edges (11) along the front and rear direction of the duct cavity (10), and the positioning groove (9) is formed through the positioning edges (11). The positioning groove (9) is formed laterally in the duct cavity (10). The PTC heating element (3) is fixed in the upper air duct (1) and the lower air duct (2) through the left PTC bracket (4) and the right PTC bracket (5).

10. The double fireproof air duct structure for a disinfection machine according to claim 1, characterized in that: The upper air duct (1) and the lower air duct (2) are fixed to each other by fasteners, screws, or ultrasonic welding, and the ends of the two form an air inlet (12). A fan (13) is connected to the air inlet (12), and an air outlet (14) is provided on the upper air duct (1) or the lower air duct (2).

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