Air blowing head of air heater

Abstract

The air blowing head of the air heater comprises an air head part, the air head part is provided with a heating groove, the cross section of the heating groove is non-circular, an air channel is formed in the air head part, and air outlet holes are distributed in the inner wall of the heating groove and used for guiding hot air in the air channel into the heating groove and heating a workpiece. A feeding hole is formed in one side of the air head part, the feeding hole is communicated with the heating groove and is used for introducing a to-be-heated workpiece into the heating groove, the width of the feeding hole is smaller than that of the heating groove, and the air outlet hole close to one side of the feeding hole is configured to face the inner side of the heating groove. Through the arrangement of the non-circular heating grooves and the optimized air outlet holes, hot air escape is effectively reduced, the heating efficiency and uniformity are improved, meanwhile, it is ensured that workpieces are rapidly preheated, and heat loss is reduced.

Description

Technical Field

[0001] This application relates to the field of industrial hot air blowers, and particularly to a blower head of a hot air blower. Background Art

[0002] In the application of hot air blowers, the blower head, as a key component, is responsible for precisely blowing hot air onto the workpiece to be heated to achieve specific heating effects, such as heating and shrinking a heat shrink tube to tightly wrap it around a wire, pipe, or flat material. However, the existing blower head designs have deficiencies in many aspects and urgently need to be improved to enhance heating efficiency and uniformity.

[0003] Specifically, the cross-sectional designs of traditional blower heads are mainly divided into two types: U-shaped and circular. Although the U-shaped design is somewhat convenient for placing the workpiece, its open feed port design becomes the main channel for hot air escape, resulting in a large amount of hot air being lost during the heating process. This not only reduces the heating efficiency but also may cause unnecessary heat pollution to the surrounding environment. In addition, the workpieces at the U-shaped opening are prone to uneven heating during the heating process, especially the workpieces at the opening edge, often requiring additional flipping operations to ensure full heating, which undoubtedly increases the complexity and time cost of the operation.

[0004] The circular blower head design, although reducing hot air escape to a certain extent, brings new challenges due to its air flow distribution characteristics. When the air flow passes through the circular cross-section, due to the symmetry of the cross-section, the air flow is prone to form vortices in the central region. This vortex phenomenon will interfere with the stability of the air flow, resulting in too strong heating effect in the central region. At the same time, in the edge region of the circular cross-section, the air flow may generate turbulence due to the obstruction of the wall surface, further reducing the air flow uniformity and affecting the overall heating effect of the workpiece. Summary of the Utility Model

[0005] The purpose of this application is to provide a blower head of a hot air blower, which optimizes the air flow distribution through a non-circular cross-section design, reduces hot air escape, improves heating efficiency and uniformity, and simplifies the operation process to meet the high-precision and high-efficiency heating requirements.

[0006] To achieve the above purpose, this application provides the following technical solutions:

[0007] A blowing head of a hot air blower, comprising a wind head portion. The wind head portion has a heating groove, and the cross-section of the heating groove is non-circular. A wind duct is provided inside the wind head portion, and air outlet holes are distributed on the inner wall of the heating groove for introducing hot air in the wind duct into the heating groove and heating a workpiece. A feeding port is provided on one side of the wind head portion, and the feeding port is communicated with the heating groove for introducing the workpiece to be heated into the heating groove. The width of the feeding port is smaller than the width of the heating groove, and the air outlet holes near the feeding port side are configured to face the inner side of the heating groove.

[0008] Further, baffles are respectively provided on both sides of the wind head portion for blocking the escape of hot air.

[0009] Further, the cross-section of the heating groove is oval.

[0010] Further, a docking portion is provided on one side of the wind head portion. An air outlet through hole is provided inside the docking portion, and the air outlet through hole is communicated with the wind duct. A positioning portion is provided at the end of the docking portion.

[0011] Further, the wind head portion is detachably installed on the air outlet pipe of the hot air blower through the positioning portion and a clamp.

[0012] Further, a temperature sensor is provided in the wind duct of the wind head portion for monitoring the temperature in the wind duct.

[0013] Further, a protective cover is provided outside the wind head portion.

[0014] Further, a heat insulation board is provided inside the protective cover.

[0015] Further, a wind curtain generating device is further included. The wind curtain generating device is used to form an air curtain on both sides of the wind head portion to block the hot air from flowing out from both sides of the heating groove.

[0016] Further, the wind curtain generating device includes a fan and a wind duct guiding portion. The fan guides the airflow generated by the fan through the wind duct guiding portion, so as to form an air curtain on both sides of the air outlet head.

[0017] The beneficial effects of the present application are as follows:

[0018] (1) The non-circular design of the heating groove reduces the escape path of hot air during the heating process, especially avoiding the problem of a large amount of hot air escaping through the open feeding port like in the U-shaped design. This helps to concentrate more hot air in the heating groove and directly act on the workpiece, thus significantly improving the heating efficiency and heat utilization rate.

[0019] (2) The non-circular cross-sectional design of this application helps to optimize the distribution characteristics of the air flow and reduce the occurrence of eddy currents and turbulence. Through the carefully designed layout of the air outlet holes, especially the configuration of the air outlet holes on the side close to the feed inlet facing the inside of the heating tank, it can ensure that the workpiece is immediately wrapped by uniform hot air when introduced into the heating tank, reducing the problem of uneven heating caused by uneven air flow.

[0020] (3) The air outlet holes on the side of this application close to the feed inlet are specifically configured to face the inside of the heating tank. This design can ensure that when the workpiece enters the heating tank through the feed inlet, it is surrounded by the high-temperature air flow from the air duct, achieving rapid preheating and uniform heating. At the same time, it also reduces the possibility of hot air escaping directly from the feed inlet, further improving the utilization rate of heat.

[0021] (4) The width of the feed inlet of this application is smaller than the width of the heating tank, which helps to reduce the heat loss from the feed inlet during the heating process. Because the narrower feed inlet restricts the outflow of the internal hot air, thus maintaining a relatively high temperature environment inside the heating tank. Brief Description of the Drawings

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the blower head provided by an embodiment of this application after being installed on the hot air blower;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the blower head provided by an embodiment of this application;

[0024] Figure 3 It is a top view of the blower head provided by an embodiment of this application;

[0025] Figure 4 It is Figure 3 A cross-sectional view taken at A-A;

[0026] Figure 5 It is Figure 3 A cross-sectional view taken at A-A;

[0027] Figure 6 It is a side view of the blower head provided by an embodiment of this application;

[0028] Figure 7 It is Figure 6 A cross-sectional view taken at B-B;

[0029] Figure 8 It is an exploded structural schematic diagram of the docking part of the blower head provided by an embodiment of this application and the ventilation pipe of the hot air blower before docking;

[0030] Figure 9 It is a three-dimensional structural schematic diagram of the blower head provided by an embodiment of this application after being wrapped by a protective cover;

[0031] Figure 10 The structural schematic diagram of the hair dryer head after installing the air curtain generating device provided by an embodiment of the present application;

[0032] Figure 11 For Figure 10 The cross-sectional view at C-C;

[0033] Explanation of reference numerals:

[0034] Q, workpiece;

[0035] 1, hair dryer head;

[0036] 11, air head part; 12, docking part; 13, protective cover; 14, air curtain generating device;

[0037] 111, heating tank; 112, air duct; 113, air outlet hole; 114, inner wall of the heating tank; 115, feed inlet; 116, baffle;

[0038] 121, air outlet through hole; 122, positioning part; 123, clamp; 124, temperature sensor;

[0039] 131, feed avoiding part; 132, heat dissipation hole; 133, heat insulation board;

[0040] 141, fan; 142, air duct guiding part; Detailed implementation manners

[0041] The terms used in the implementation manners part of the present application are only for explaining the specific embodiments of the present application, rather than aiming to limit the present application. The implementation manners of the embodiments of the present application will be described in detail below with reference to the drawings.

[0042] As Figure 1 shown, a hair dryer head 1 of a hot air blower 2 includes an air head part 11, a docking part 12, a protective cover 13 and an air curtain production device 14. The docking part 12 is arranged on one side of the air head part 11 and is used to connect with the main body of the hot air blower; the protective cover 13 covers the outer periphery of the air head part 11, and the air curtain production device 14 is arranged at the bottom of the protective cover 13.

[0043] As Figure 2 shown, the air head part 11 has a heating tank 111. As Figure 4 shown, the cross-section of the heating tank 111 is non-circular, such as oval or other irregular shapes, so as to reduce the escape path of hot air during the heating process, especially avoiding the problem of a large amount of hot air loss through the open feed inlet like the U-shaped design; As Figure 5As shown, a wind duct 112 is provided inside the wind head 11. A plurality of air outlet holes 113 are distributed on the inner wall 114 of the heating tank, which are used to introduce the hot air in the wind duct 112 into the heating tank 111 and heat the workpiece Q. One side of the wind head 11 is provided with a feed inlet 115, and the feed inlet 115 is communicated with the heating tank 111, which is used to introduce the workpiece Q to be heated into the heating tank 111.

[0044] As Figure 4 shown, the width H1 of the feed inlet 115 is smaller than the width H2 of the heating tank 111. This design helps to reduce the heat loss from the feed inlet 115 during the heating process. Because the narrower feed inlet 115 restricts the outflow of the internal hot air, thus maintaining a higher temperature environment inside the heating tank 111; As Figure 4 shown, the air outlet holes 113 near the feed inlet 115 are configured to face the inner side of the heating tank 111; The "inner side W" here refers to the direction inside the heating tank 111 relative to the feed inlet 115. This design can ensure that when the workpiece Q enters the heating tank 111 through the feed inlet 115, it is immediately surrounded by the high-temperature air flow from the wind duct 112, realizing rapid preheating and uniform heating. At the same time, it also reduces the possibility of hot air escaping directly from the feed inlet 115, further improving the utilization rate of heat.

[0045] As Figure 2 and Figure 7 shown, in this embodiment, baffles 116 are respectively provided on both sides of the wind head 11, and the baffles 116 respectively surround the notches E at the left and right ends of the heating tank 111, which are used to block the escape of hot air. The baffle 116 can significantly reduce the lateral escape of hot air from the side ends of the heating tank 111, ensuring that more hot air can be concentrated inside the heating tank 111 and directly heat the workpiece Q. This helps to improve the heating efficiency because the hot air stays in the heating tank 111 for a longer time and the heat exchange with the workpiece Q is more sufficient.

[0046] As Figure 4 and Figure 6 shown, in this embodiment, the cross-section F of the heating tank 111 is elliptical. The elliptical design can form a natural "runway" - shaped air flow channel inside the heating tank 111. This design enables the hot air to flow along a specific path when passing through the air outlet holes 113, and turn due to inertia after reaching the end, forming a backflow. This backflow phenomenon helps to maintain the continuous circulation of the hot air inside the heating tank 111, thereby prolonging the contact time between the hot air and the workpiece Q and improving the heating efficiency.

[0047] Since the hot air forms a stable circulating flow inside the heating tank 111, the workpiece Q can be uniformly heated from all directions. This uniform heating method helps to reduce the temperature difference on the surface of the workpiece Q and improve the heating quality.

[0048] Since the hot air forms a stable circulating flow in the heating tank 111, the possibility of the hot air directly escaping from the feed inlet 115 is reduced, thereby reducing heat loss. This not only improves the utilization rate of thermal energy but also helps to save energy and reduce costs.

[0049] As Figure 8 shown, in this embodiment, a docking portion 12 is provided on one side of the air head portion 11. An air outlet through hole 121 is provided in the docking portion 12. The air outlet through hole 121 communicates with the air duct 112. A positioning portion 122 is provided at the end of the docking portion 12. The positioning portion 122 is provided to facilitate the precise positioning of the blowing head 1 during the installation process, ensuring that the blowing head 1 can accurately dock with the hot air blower main body or other connecting components and avoiding position deviation.

[0050] As Figure 8 shown, the positioning portion 122 can adopt various forms, such as flanges, grooves, etc. These structures can match with the corresponding structures on other components to form a stable positioning relationship. For example, the positioning portion 122 can be a groove provided at the end of the docking portion 12, and the edge of this groove can be embedded in the flange 125 on the ventilation pipe of the hot air blower, thereby realizing the precise positioning and fixation of the blowing head 1. During the installation process, the operator only needs to align the docking portion 12 of the blowing head 1 with the corresponding interface of the hot air blower main body or other connecting components, then use the positioning portion 122 for preliminary positioning, and then firmly install the blowing head 1 at the predetermined position through fastening screws, buckles or other fixing devices.

[0051] As Figure 8 shown, in this embodiment, the air head portion 11 is detachably installed on the air outlet pipe of the hot air blower through the positioning portion 122 and the clamp 123. By combining the use of the positioning portion 122, the clamp 123 and the bolts, the detachable installation between the air head portion 11 and the air outlet pipe of the hot air blower is realized. This design not only improves the convenience of installation but also facilitates subsequent maintenance and replacement.

[0052] As Figure 4 shown, in this embodiment, a temperature sensor 124 is provided in the air duct 112 of the air head portion 11 for monitoring the temperature in the air duct 112. Because during the processing of the workpiece Q, the temperature on its surface may be affected by various factors, such as the direct blowing of hot air, the radiant heat of the surrounding environment, etc. If the temperature sensor 124 can be as close as possible to the workpiece Q, then it can more directly sense the actual temperature environment where the workpiece Q is located, thereby providing more accurate temperature data.

[0053] When workpiece Q is being processed, it cannot be allowed to be at too high a temperature, because high temperatures may cause adverse consequences such as deformation, cracking, and reduced hardness of workpiece Q. Therefore, through the real-time monitoring and precise control of temperature sensor 124, it can be ensured that workpiece Q always remains within a safe temperature range during the processing, thereby protecting the quality and performance of workpiece Q.

[0054] As Figure 9 shown, in this embodiment, a protective cover 13 is provided outside the air head 11. The protective cover 13 is installed on one side of the hot air blower. The protective cover 13 is also provided with a feeding avoidance portion 131 for the feeding port 115 of the air head 11. In addition, heat dissipation holes 132 are provided on the upper and lower surfaces of the protective cover 13 to form an effective convective heat dissipation channel, which can quickly reduce the temperature inside the protective cover 13 and prevent its heat from being transferred to the hot air blower box, thereby affecting the overall performance and lifespan of the internal components of the hot air blower.

[0055] As Figure 9 shown, in this embodiment, a heat insulation board 133 is provided inside the protective cover 13. Reducing heat dissipation can also lower the temperature of the protective cover 13 and the surrounding environment, reducing potential safety hazards caused by high temperatures.

[0056] As Figure 10 and Figure 11 shown, in this embodiment, it further includes an air curtain generating device 14. The air curtain generating device 14 is used to form air curtains on both sides of the air head 11 to block the hot air from flowing out from both sides of the heating tank 111 and isolate the hot air in the heating tank 111 from the external environment.

[0057] As Figure 11 shown, in this embodiment, the air curtain generating device 14 includes a fan 141 and an air duct diversion portion 142. The fan 141 guides the airflow generated by the fan 141 through the air duct diversion portion 142, thereby forming air curtains on both sides of the air outlet head.

[0058] The fan 141 is the power source of the air curtain generating device 14, and it is responsible for generating airflow. When the fan 141 is started, it will inhale air and accelerate its discharge by rotating the blades, thereby generating a certain amount of air volume and air pressure.

[0059] The main function of the air duct diversion portion 142 is to guide the airflow generated by the fan 141 to a predetermined direction and form continuous air curtains on both sides of the air outlet head. It enables the airflow to gradually spread and cover the entire area on both sides of the air outlet head during the flow process.

[0060] When the fan 141 is started, the airflow it generates first enters the air duct guiding part 142. Under the guidance of the air duct guiding part 142, the airflow flows along a predetermined direction and gradually diffuses to the two side areas of the air outlet head. Thus, a continuous and stable air curtain is formed on both sides of the air outlet head. This air curtain can effectively block the hot air from flowing out from both sides of the heating tank 111, improving the heating efficiency and energy efficiency ratio of the hot air blower.

[0061] During the operation of the hot air blower, if the high-temperature hot air in the heating tank 111 is not controlled, it is very easy to overflow from the air outlet or gaps, causing burns or other thermal injuries to the surrounding operators. The air curtain generating device 14 forms a continuous air curtain on both sides of the air outlet head, forming a physical barrier that effectively blocks the outflow of hot air. In this way, even if the high-temperature hot air in the heating tank 111 is generated, most of it is restricted inside the heating tank 111 and the air outlet head, reducing the chance of direct contact between the hot air and the operators, thereby reducing the risk of thermal injuries.

[0062] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection or an indirect connection through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0063] The device or element referred to in the embodiments of the present application or implied must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless otherwise precisely and specifically specified.

[0064] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims, and the above drawings of the embodiments of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here, for example, can be implemented in an order other than those illustrated or described here. In addition, the terms "may include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features. And these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A blowing head of a hot air blower, characterized in that: It includes a wind head. The wind head has a heating groove, the cross-section of the heating groove is non-circular, a wind channel is arranged inside the wind head, and air outlet holes are distributed on the inner wall of the heating groove, which are used to introduce the hot air in the wind channel into the heating groove and heat the workpiece. One side of the wind head is provided with a feed port, and the feed port is communicated with the heating groove, which is used to introduce the workpiece to be heated into the heating groove. The width of the feed port is smaller than the width of the heating groove, and the air outlet holes near the feed port are configured to face the inner side of the heating groove.

2. The blowing head of a hot air blower according to claim 1, characterized in that: Baffles are respectively arranged on both sides of the wind head to block the escape of hot air.

3. The blowing head of a hot air blower according to claim 1, characterized in that: The cross-section of the heating groove is oval.

4. The blowing head of a hot air blower according to claim 1, characterized in that: A docking part is arranged on one side of the wind head. An air outlet through hole is arranged inside the docking part, and the air outlet through hole is communicated with the wind channel. A positioning part is arranged at the end of the docking part.

5. The blowing head of a hot air blower according to claim 4, characterized in that: The wind head is detachably installed on the air outlet pipe of the hot air blower through the positioning part and the clamp.

6. The blowing head of a hot air blower according to claim 1, characterized in that: A temperature sensor is arranged in the wind channel of the wind head to monitor the temperature in the wind channel.

7. The blowing head of a hot air blower according to claim 1, characterized in that: A protective cover is sleeved outside the wind head.

8. The blowing head of a hot air blower according to claim 7, characterized in that: A heat insulation board is arranged inside the protective cover.

9. The blowing head of a hot air blower according to claim 1, characterized in that: It further includes a wind curtain generating device, which is used to form an air curtain on both sides of the wind head to block the hot air from flowing out from both sides of the heating groove.

10. The blowing head of a hot air blower according to claim 9, characterized in that: The wind curtain generating device includes a fan and a wind channel guiding part. The fan guides the airflow generated by the fan through the wind channel guiding part, so as to form an air curtain on both sides of the air outlet head.

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