Electric heating air curtain machine with air guide grid

Abstract

The utility model provides an electric heating air curtain machine with air guide grids. The electric heating air curtain machine comprises a machine shell, a fan assembly, a plurality of PTC heating assemblies and a plurality of air guide grid assemblies. An air cavity is formed in the machine shell, the air cavity is provided with an air outlet, the fan assembly is arranged in the air cavity, the PTC heating assembly and the air guide grid are sequentially arranged at the air outlet in the air outlet direction of the air outlet, the air guide grid is in running fit with the machine shell, and the air guide grid assembly is provided with a plurality of air guide channels communicated with the air outlet. According to the electric heating air curtain machine with the air guide grid, the air guide grid assembly can achieve the air guide effect, the PCT heating assembly can be prevented from being touched by mistake, and the effect of improving safety is achieved; the integrated design of the mounting plate and the volute of the shell is beneficial to simplifying the structure of the shell and reducing the cost; the wall hanging plate is convenient to mount, so that disassembly and assembly are simpler and more convenient; the design of the cavity in the casing facilitates the installation and wiring of electronic components, and enables the structure to be cleaner and tidier.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to an electric heating air curtain machine with an air guide grid. Background Technology

[0002] An air curtain machine is an air purification device that uses a high-speed motor to drive a cross-flow or centrifugal fan to generate a powerful airflow, forming an "invisible curtain." The air curtain blown out by the air curtain machine can divide the indoor and outdoor areas into two independent temperature zones, creating a comfortable indoor environment, maintaining the effectiveness of indoor air conditioning and air purification, saving energy, and promoting air circulation. It can effectively isolate dust, smoke, odors, insects, and microorganisms.

[0003] To maintain indoor temperature and prevent outdoor temperature from affecting the indoor environment, air curtain machines are also designed with a heating function. The heating components on air curtain machines are usually PCT heating components. To improve safety, a safety net is designed at the air outlet of the air curtain machine to prevent people from touching the internal PCT heating components and to ensure the safety of the PCT heating components. However, the safety net does not have the function of guiding air, which means that the air curtain of the air curtain machine can only blow out in one direction, resulting in poor practicality and a poor user experience. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and provide an electric heating air curtain machine with an air guide grid.

[0005] One embodiment of this utility model provides an electric heating air curtain machine with air guide grid, including: a housing, a fan assembly, a plurality of PTC heating components and a plurality of air guide grid components;

[0006] The housing is provided with an air cavity, the air cavity has an air outlet, the fan assembly is disposed in the air cavity, the PTC heating assembly and the air guide grid are arranged sequentially at the air outlet along the air outlet direction, the air guide grid is rotatably engaged with the housing, and the air guide grid assembly is provided with multiple air guide channels communicating with the air outlet.

[0007] In some optional embodiments, the air guide grid assembly includes two end caps, a plurality of first protective strips arranged side by side, and a plurality of second protective strips arranged side by side. The end caps are rotatably engaged with the housing. The two ends of the first protective strips are respectively connected to the two end caps. The first protective strips and the second protective strips are connected and arranged to cross each other. The plurality of first protective strips and the plurality of second protective strips cross each other to form a plurality of air guide channels.

[0008] In some optional embodiments, the air guide grid assembly is provided with a plurality of shaft portions, and the shaft portions are provided with a plurality of positioning grooves, which are evenly arranged around the circumference of the shaft portions.

[0009] The housing is provided with several grid rotating seats, each grid rotating seat is provided with a shaft hole, and the inner wall of the shaft hole is provided with several positioning parts. The shaft part is rotatably engaged with the shaft hole, and the positioning part is positioned engaged with the positioning groove.

[0010] In some optional embodiments, the angle between the air guiding direction of the air guide channel and the direction of the air outlet is in the range of -30° to 30°.

[0011] In some alternative embodiments, the housing includes a mounting plate, a volute plate, a front plate, and two side plates. The mounting plate and the volute plate are integrally formed, and the mounting plate, the volute plate, the front plate, and the side plates surround to form the air cavity, which is a volute chamber.

[0012] In some optional embodiments, a wall-mounting panel is provided on the rear side of the housing, and the wall-mounting panel is detachably connected to the housing by a number of locking components. The air outlet is provided with an operating hole for the locking components to pass through, and the operating hole is connected to the rear side of the housing.

[0013] In some alternative embodiments, the air outlet is arranged at the bottom of the housing, and an inclined mounting plate is provided on the rear side of the housing. The wall-mounted plate is detachably connected to the inclined mounting plate via the locking member, and the inclined mounting plate is arranged inclined downwards on the side facing the operating hole.

[0014] In some optional embodiments, a limiting groove is provided on the rear side of the housing, and a limiting strip is provided on the wall panel, the limiting strip engaging with the limiting groove for limiting.

[0015] In some alternative embodiments, the electric heating air curtain machine with air guide grid includes two PTC heating components, the air cavity has two air outlets, the two PTC heating components are correspondingly arranged in the two air outlets, and the housing is provided with an intermediate contactor bracket located between the two PTC heating components.

[0016] The wind turbine assembly includes a left impeller module, a left motor bracket, a motor module, a right motor bracket, and a right impeller module. The left impeller module, the left motor bracket, the motor module, the right motor bracket, and the right impeller module are arranged sequentially from left to right within the housing. The left motor bracket is connected to the left impeller module, and the right motor bracket is connected to the right impeller module. Both the left and right motor brackets are connected to the housing. The two sides of the motor module are respectively mounted on the left motor bracket and the right motor bracket, and are respectively driven connected to the left impeller module and the right impeller module.

[0017] The left motor bracket and the right motor bracket are located on both sides of the intermediate contactor bracket, and the PTC heating assembly, the intermediate contactor bracket, the left motor bracket, the right motor bracket and the housing surround to form a cavity for mounting electronic components. The cavity is provided with wiring holes that connect to the outside of the housing.

[0018] In some alternative embodiments, a terminal block assembly and a protective cover are provided on the outside of the housing, the protective cover covering the outside of the terminal block assembly.

[0019] Compared to existing technologies, the air guide grid assembly of this electric heating air curtain machine with air guide grid not only achieves the function of air guidance but also prevents accidental contact with the PCT heating component, thereby improving safety. In addition, the integrated design of the mounting plate and volute of the housing simplifies the housing structure and reduces costs. The wall-mounted plate is easy to install, making disassembly and assembly easier. The cavity design inside the housing facilitates the installation and wiring of electronic components, resulting in a cleaner structure. The wiring terminals on the outside of the housing allow for easy connection of power cords, making operation convenient. Furthermore, the wiring terminals can be effectively arranged by utilizing the clearance created by the bending of the volute plate.

[0020] To provide a clearer understanding of this invention, the specific embodiments of the invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is an exploded view of an electric heating air curtain machine with an air guide grid according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of a portion of the structure of an electric heating air curtain machine with an air guide grid according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of an air guide grid assembly according to an embodiment of the present invention;

[0024] Figure 4 for Figure 3 The enlarged view at point A is shown below;

[0025] Figure 5 This is a schematic diagram of a portion of the structure of an electric heating air curtain machine with an air guide grid according to an embodiment of the present invention;

[0026] Figure 6 for Figure 5 The enlarged view at point B is shown below;

[0027] Figure 7 This is a schematic diagram of one side of the mounting plate and worm gear according to an embodiment of the present invention;

[0028] Figure 8 This is an exploded view of the rear side of an electric heating air curtain machine with an air guide grid according to an embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of one side of a partial structure of an electric heating air curtain machine with an air guide grid according to an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10. Housing; 11. Air cavity; 111. Air outlet; 112. Operating hole; 12. Grid rotating seat; 121. Shaft hole; 122. Positioning part; 13. Mounting plate; 14. Spiral plate; 15. Front plate; 16. Side plate; 17. Inclined mounting plate; 18. Limiting groove; 20. Fan assembly; 21. Left impeller module; 22. Left motor bracket; 23. Motor module; 24. Right motor bracket; 25. Right impeller module; 30. 22 PTC heating units; 40. Air guide grid assembly; 41. End cap; 42. First protective strip; 43. Second protective strip; 44. Shaft; 45. Positioning groove; 50. Terminal assembly; 51. Protective cover; 60. Wall mounting plate; 61. Locking part; 62. Limiting strip; 70. Intermediate contactor bracket; 80. Cavity; 81. Wiring hole. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, unless otherwise stated, "a plurality of" means two or more, and "a number" means one or more. In addition, unless otherwise stated, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In the description of this utility model, references to terms such as "one embodiment," "some alternative implementations," or "some optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] Please see Figure 1 and Figure 2 One embodiment of this utility model provides an electric heating air curtain machine with air guide grid, including: a housing 10, a fan assembly 20, a plurality of PTC heating components and a plurality of air guide grid assemblies 40.

[0037] An air chamber 11 is provided inside the housing 10, and the air chamber 11 has an air outlet 111. The fan assembly 20 is disposed inside the air chamber 11. The PTC heating element and the air guide grid are arranged sequentially at the air outlet 111 along the air outlet direction. The air guide grid is rotatably engaged with the housing 10. The air guide grid assembly 40 is provided with multiple air guide channels communicating with the air outlet 111. The air guide grid assembly 40 rotates relative to the housing 10, thereby changing the angle of the air guide channels relative to the air outlet 111, thus achieving the air guiding function. The air guide grid assembly 40 can also prevent people from touching the PTC heating element and prevent other sturdy objects from entering the air outlet 111 and colliding with the PTC heating element, thereby improving safety.

[0038] Please see Figure 3 The specific structure of the air guide grid assembly 40 can be selected according to actual needs. For example, in some optional embodiments, the air guide grid assembly 40 includes two end caps 41, multiple first protective strips 42 arranged side by side, and multiple second protective strips 43 arranged side by side. The end caps 41 are rotatably engaged with the housing 10. The two ends of the first protective strips 42 are respectively connected to the two end caps 41. The first protective strips 42 and the second protective strips 43 are connected and arranged in a crisscross pattern. Multiple first protective strips 42 and multiple second protective strips 43 intersect and surround to form multiple air guide channels. The first protective strips 42 and the second protective strips 43 can prevent people from touching the PCT heating element and can also prevent foreign objects from entering the air outlet 111 and colliding with the PCT heating element.

[0039] Please see Figures 4 to 6 In some optional embodiments, the air guide grid assembly 40 is provided with a plurality of shaft portions 44, and a plurality of positioning grooves 45 are provided on the shaft portions 44. The plurality of positioning grooves 45 are evenly arranged around the circumference of the shaft portions 44. In this embodiment, the shaft portions 44 are provided on the end cap 41. The housing 10 is provided with a plurality of grid rotating seats 12, and the grid rotating seats 12 are provided with shaft holes 121. The inner wall of the shaft holes 121 is provided with a plurality of positioning portions 122. The shaft portions 44 are rotatably engaged with the shaft holes 121, and the positioning portions 122 are positioned engaged with the positioning grooves 45, thereby maintaining the angle of the air guide channel of the air guide grid assembly 40 relative to the air outlet 111. When it is necessary to adjust the air guide grid assembly 40, it is only necessary to apply force to the air guide grid assembly 40 so that the positioning portions 122 disengage from the current positioning groove 45 and are positioned engaged with other positioning grooves 45. In this embodiment, a plurality of positioning portions 122 are provided in the shaft hole 121, which are evenly arranged circumferentially around the shaft hole 121. The positioning stability can be improved by the positioning portions 122 engaging with the positioning grooves 45. In addition, in this embodiment, the sidewalls of the positioning grooves 45 are designed with slopes to facilitate guiding the positioning portions 122 out of the positioning grooves 45.

[0040] In some optional embodiments, the angle between the air guiding direction of the air guide channel and the direction of the air outlet 111 is in the range of -30° to 30°. That is, the air guide grid assembly 40 can rotate within a certain range so that the angle between the air guiding direction of the air guide channel and the direction of the air outlet 111 is in the range of -30° to 30°. This avoids the air guide grid assembly 40 from colliding with the PCT heating component due to excessive rotation, and also prevents the air guide channel from guiding the airflow to blow towards the inner wall of the air outlet 111.

[0041] Please see Figure 7In some optional embodiments, the housing 10 includes a mounting plate 13, a volute plate 14, a front plate 15, and two side plates 16. The mounting plate 13 and the volute plate 14 are integrally formed. In this embodiment, the mounting plate 13 and the volute plate 14 are welded together. The mounting plate 13, the volute plate 14, the front plate 15, and the side plates 16 surround each other to form an air cavity 11, which is a volute chamber. The integral design of the volute plate 14 and the mounting plate 13 simplifies the structure of the mounting plate 13. Moreover, the curved design of the volute plate 14 creates a certain clearance space between the volute plate 14 and the wall, which facilitates wiring.

[0042] Please see Figure 8 In some optional embodiments, a terminal block assembly 50 and a protective cover 51 are provided on the outer side of the housing 10. The protective cover 51 covers the outer side of the terminal block assembly 50. Since the terminal block assembly 50 is located on the outer side of the housing 10, it is convenient for external wires (such as power cords) to be connected to the terminal block assembly 50. The protective cover 51 protects the terminal block assembly 50, which is more in line with CCC requirements. In addition, in this embodiment, the terminal block assembly 50 and the protective cover 51 are disposed on the worm gear 14 and located within the clearance space. This effectively utilizes the clearance space formed by the bending of the worm gear 14. Moreover, the terminal block assembly 50 and the protective cover 51 are located between the worm gear 14 and the wall, making them less likely to be accidentally touched or observed, thus ensuring both safety and aesthetics.

[0043] Please see Figure 5 , Figure 7 and Figure 8 In some optional embodiments, a wall-mounting plate 60 is provided on the rear side of the housing 10. The wall-mounting plate 60 is fixed to a wall or other installation position. The wall-mounting plate 60 and the housing 10 are detachably connected by several locking parts 61, which facilitates the disassembly, assembly, and maintenance of the housing 10. The air outlet 111 is provided with an operating hole 112 for the locking parts 61 to pass through. The operating hole 112 is connected to the rear side of the housing 10. When installing the housing 10 onto the wall panel 60 or removing the housing 10 from the wall panel 60, the gap between the housing 10 and the wall is too small to operate. However, the operating hole 112 allows for easy operation of the locking member 61. For example, when installing the housing 10 onto the wall panel 60, after the housing 10 is hung on the wall panel 60, the locking member 61 can be passed through the operating hole 112 and then connected to the housing 10 and the wall panel 60. In this embodiment, the locking member 61 is a threaded locking member 61. The operating hole 112 can also be used for installation tools to tighten the threaded locking member 61.

[0044] In some alternative embodiments, the air outlet 111 is located at the bottom of the housing 10, and an inclined mounting plate 1713 is provided on the rear side of the housing 10. The wall-mounted plate 60 is detachably connected to the inclined mounting plate 1713 via a locking member 61. The inclined mounting plate 1713 is inclined downwards towards the side facing the operating hole, thereby avoiding the user's inability to observe the connection position between the housing 10 and the wall-mounted plate 60 from the operating hole due to the width limitation of the air outlet 111. Since the wall-mounted plate 60 is usually located at a higher position, the user usually observes it from below the housing 10. The inclined mounting plate 1713 is inclined downwards, making it easy for the user to observe the inclined mounting plate 1713, thus facilitating the user's disassembly and assembly operations. In this embodiment, the operating hole is located on the mounting plate 13, and the inclined mounting plate 1713 is located on the rear side of the mounting plate 13.

[0045] In some alternative embodiments, a limiting groove 18 is provided on the rear side of the housing 10, and a limiting strip 62 is provided on the wall-mounted plate 60. The limiting strip 62 cooperates with the limiting groove 18 to limit the wall-mounted plate 60 and the housing 10 in advance, so as to facilitate the installation of the locking member 61 and improve the stability of the connection between the housing 10 and the wall-mounted plate 60. In this embodiment, the limiting strip 62 is located on the top plate of the wall-mounting panel 60, and the bottom of the wall-mounting panel 60 is connected to the inclined mounting plate 1713. During the disassembly and assembly of the housing 10, the housing 10 is placed on the wall-mounting panel 60. The limiting groove 18 and the limiting strip 62 cooperate to restrict the housing 10 to the wall-mounting panel 60, making it difficult for the housing 10 to fall off the wall-mounting panel 60 initially. Moreover, when the housing 10 is installed, the limiting groove 18 and the limiting strip 62 cooperate to restrict the position between the top of the wall-mounting panel 60 and the housing 10, and the locking member 61 restricts the position between the bottom of the wall-mounting panel 60 and the housing 10, thereby making the connection between the housing 10 and the wall-mounting panel 60 more stable. In this embodiment, the limiting groove 18 is arranged on the rear side of the mounting plate 13.

[0046] Please see Figure 9In some optional embodiments, the electric air curtain machine with air guide grid includes two PTC heating components. The air cavity 11 has two air outlets 111, and the two PTC heating components are correspondingly arranged in the two air outlets 111. An intermediate contactor bracket 70 located between the two PTC heating components is provided on the housing 10. The fan assembly 20 includes a left impeller module 21, a left motor bracket 22, a motor module 23, a right motor bracket 24, and a right impeller module 25. The motor bracket 24 and the right impeller module 25 are arranged sequentially from left to right inside the housing 10. The left motor bracket 22 is connected to the left impeller module 21, and the right motor bracket 24 is connected to the right impeller module 25. Both the left motor bracket 22 and the right motor bracket 24 are connected to the housing 10. The two sides of the motor module 23 are respectively mounted on the left motor bracket 22 and the right motor bracket 24, and are respectively driven by the left impeller module 21 and the right impeller module 25. The motor module 23 drives the left impeller module 21 and the right impeller module 25 to rotate, thereby driving the airflow.

[0047] The left motor bracket 22 and right motor bracket 24 are located on either side of the intermediate contactor bracket 70. The PTC heating assembly, intermediate contactor bracket 70, left motor bracket 22, right motor bracket 24, and housing 10 surround and form a cavity 80 for mounting electronic components, facilitating centralized mounting of electronic components. Since the PTC heating assembly, motor module 23, intermediate contactor, and other components requiring wiring are arranged near the cavity 80, wire routing is convenient, simplifying the internal structure of the housing 10. Furthermore, the cavity 80 is provided with a wiring hole 81 connecting to the outside of the housing 10, allowing wires to directly enter the cavity 80 through the wiring hole 81, further facilitating wire routing. In this embodiment, the terminal block assembly 50 is arranged on the side of the wiring hole for convenient wiring.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric heating air curtain machine with an air guide grid, characterized in that, include: The casing, fan assembly, several PTC heating components, and several air guide grid assemblies; The housing is provided with an air cavity, the air cavity has an air outlet, the fan assembly is disposed in the air cavity, the PTC heating assembly and the air guide grid are arranged sequentially at the air outlet along the air outlet direction, the air guide grid is rotatably engaged with the housing, and the air guide grid assembly is provided with multiple air guide channels communicating with the air outlet.

2. The electric heating air curtain machine with air guide grid according to claim 1, characterized in that: The air guide grid assembly includes two end caps, multiple first protective strips arranged side by side, and multiple second protective strips arranged side by side. The end caps are rotatably engaged with the housing. The two ends of the first protective strips are respectively connected to the two end caps. The first protective strips and the second protective strips are connected and arranged to cross each other. Multiple first protective strips and multiple second protective strips cross each other to form multiple air guide channels.

3. An electric heating air curtain machine with an air guide grid according to claim 1, characterized in that: The air guide grid assembly is provided with several shaft portions, and multiple positioning grooves are provided on the shaft portions, with the multiple positioning grooves evenly arranged around the circumference of the shaft portions. The housing is provided with several grid rotating seats, each grid rotating seat is provided with a shaft hole, and the inner wall of the shaft hole is provided with several positioning parts. The shaft part is rotatably engaged with the shaft hole, and the positioning part is positioned engaged with the positioning groove.

4. An electric heating air curtain machine with an air guide grid according to claim 1, characterized in that: The angle between the air guiding direction of the air guide channel and the direction of the air outlet is in the range of -30° to 30°.

5. An electric heating air curtain machine with an air guide grid according to any one of claims 1 to 4, characterized in that: The housing includes a mounting plate, a volute plate, a front plate, and two side plates. The mounting plate and the volute plate are integrally formed. The mounting plate, the volute plate, the front plate, and the side plates surround each other to form the air cavity, which is a volute chamber.

6. An electric heating air curtain machine with an air guide grid according to any one of claims 1 to 4, characterized in that: A wall-mounting panel is provided on the rear side of the housing. The wall-mounting panel is detachably connected to the housing by a number of locking components. An operating hole is provided in the air outlet for the locking components to pass through, and the operating hole is connected to the rear side of the housing.

7. An electric heating air curtain machine with an air guide grid according to claim 6, characterized in that: The air outlet is located at the bottom of the housing, and an inclined mounting plate is provided on the rear side of the housing. The wall-mounted plate is detachably connected to the inclined mounting plate via the locking member. The inclined mounting plate is inclined downwards towards the side facing the operating hole.

8. An electric heating air curtain machine with an air guide grid according to claim 6, characterized in that: The rear side of the casing is provided with a limiting groove, and the wall panel is provided with a limiting strip, which cooperates with the limiting groove for limiting.

9. An electric heating air curtain machine with an air guide grid according to any one of claims 1 to 4, characterized in that, It includes two PTC heating components, the air cavity has two air outlets, the two PTC heating components are correspondingly arranged in the two air outlets, and the housing is provided with an intermediate contactor bracket located between the two PTC heating components. The wind turbine assembly includes a left impeller module, a left motor bracket, a motor module, a right motor bracket, and a right impeller module. The left impeller module, the left motor bracket, the motor module, the right motor bracket, and the right impeller module are arranged sequentially from left to right within the housing. The left motor bracket is connected to the left impeller module, and the right motor bracket is connected to the right impeller module. Both the left and right motor brackets are connected to the housing. The two sides of the motor module are respectively mounted on the left motor bracket and the right motor bracket, and are respectively driven connected to the left impeller module and the right impeller module. The left motor bracket and the right motor bracket are located on both sides of the intermediate contactor bracket, and the PTC heating assembly, the intermediate contactor bracket, the left motor bracket, the right motor bracket and the housing surround to form a cavity for mounting electronic components. The cavity is provided with wiring holes that connect to the outside of the housing.

10. An electric heating air curtain machine with an air guide grid according to any one of claims 1 to 4, characterized in that: The outer side of the housing is provided with a terminal block assembly and a protective cover, with the protective cover covering the outer side of the terminal block assembly.

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