Fan structure and hair dryer comprising same

Abstract

The utility model provides a kind of fan structure and the heater containing it, it is related to heater technical field, solve the technical problem that the little hot air flow of heater center.The fan structure, including fixed part, parent fan subassembly, child fan subassembly;Fixed part is installed in the position to be installed;Parent fan subassembly is installed in the side of fixed part, away from heat source;Child fan subassembly is installed in the other side of fixed part, close to heat source;The diameter of the fan blade of child fan subassembly is less than the diameter of the fan blade of parent fan subassembly;Heater, including shell, PTC heating body, inner lining, air outlet grille and fan structure;Shell is one side open structure;Fan structure is fixed in the inside of shell;PTC heating body is installed in the front side of fan structure;Air outlet grille is installed in the open place of shell by inner lining.The utility model improves the heat dissipation efficiency of heater, especially for the middle region of PTC heating body, not only effectively solve the problem of grid discoloration, also improve the overall performance and service life of heater.

Description

Technical Field

[0001] This utility model relates to the field of heater technology, and in particular to a fan structure with dual motor letter blades and a heater containing the same. Background Technology

[0002] Existing space heaters typically use injection-molded air outlet grilles in bright colors. However, after prolonged operation, the center of the grille often discolors and turns white. This is mainly because the airflow from the internal fan cannot effectively reach the central area of ​​the PTC heating element, resulting in poor heat dissipation and causing the grille to discolor due to high temperatures. This problem not only affects the product's aesthetics but may also impact the heater's lifespan and performance due to heat dissipation issues.

[0003] The working principle of a space heater is that one or more internal fans (usually centrifugal or axial fans) draw in cold air from outside. The drawn-in cold air is heated by a heating element (usually a PTC ceramic heater or resistance wire). The heated air is then blown out through the air outlet, thus heating the room. However, because the fan airflow cannot effectively reach the central area of ​​the PTC heating element, poor heat dissipation occurs, causing the grille corresponding to the central area of ​​the PTC heating element to discolor due to high temperatures.

[0004] To address this technical problem, current technologies employ either iron mesh air outlet grilles or injection-molded air outlet grilles made from black injection molding materials. While improvements have been made to the injection molding materials to prevent high-temperature fading, the effects are not significant. This results in existing heaters still experiencing issues such as insufficient or no airflow in the central area, leading to overheating, grille discoloration, and short heater lifespan. Utility Model Content

[0005] The purpose of this utility model is to provide a fan structure with dual motor letter blades and a heater containing the same, so as to solve the technical problem of insufficient hot airflow in the center of the heater in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This utility model provides a fan structure, including a fixing component, a main fan assembly, and a sub-fan assembly; wherein:

[0008] The fastener is installed at the installation location;

[0009] The female fan assembly is mounted on one side of the fixing member, away from the heat source;

[0010] The sub-fan assembly is mounted on the other side of the fixture, close to the heat source;

[0011] The outer diameter D1 of the blades of the sub-fan assembly is less than the outer diameter D3 of the blades of the mother fan assembly.

[0012] The fan structure provided by this utility model is a mother-daughter fan structure, including a mother fan assembly and a daughter fan assembly. The outer diameter D1 of the blades of the daughter fan assembly is smaller than the outer diameter D3 of the blades of the mother fan assembly, forming a structure of one large blade and one small blade. They are driven by two motors respectively. The large blade is located at the rear and provides the main airflow. The small blade is designed in front of the fixing component, close to the heat source. Its main function is to gather the airflow and blow it towards the middle area of ​​the heat source, thereby effectively improving the heat dissipation effect and preventing the grille from discoloring.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] As a further improvement of this utility model, the fan blades in the mother fan assembly and the child fan assembly rotate in opposite directions.

[0015] This structural design allows for more even airflow distribution, enabling more airflow to reach the central area of ​​the heat source. This reduces the risk of the grille discoloration due to high temperatures in the central area and extends the lifespan of the heater.

[0016] As a further improvement of this utility model, the mother fan assembly includes a mother fan blade and a first motor; the first motor is fixed on the fixing member, and the mother fan blade is mounted on the first motor; and / or, the child fan assembly includes a child fan blade and a second motor; the second motor is fixed on the fixing member, and the child fan blade is mounted on the second motor.

[0017] This invention employs a dual-motor design, which drives the sub-fan blades and the main fan blades respectively, to achieve more efficient and precise airflow control.

[0018] As a further improvement of this utility model, the outer diameter D1 of the sub-fan blade is less than or equal to the inner diameter D2 of the mother fan blade.

[0019] With this structural design, the large fan blade, or mother fan blade, provides the basic airflow, while the small fan blade, or daughter fan blade, focuses on guiding the airflow to the central area of ​​the heat source. This structure ensures uniform heat dissipation of the entire heat source. By improving the airflow distribution, the temperature in the central area of ​​the heat source can be significantly reduced, thereby solving the problem of grille discoloration.

[0020] As a further improvement of this utility model, the mother fan blade is an arc-shaped fan blade structure, and / or the daughter fan blade is a twisted fan blade structure.

[0021] By setting the main fan blades into a large arc shape, a larger airflow surface can be formed, covering a wider area to achieve large-area air delivery; while the purpose of the sub-fan blades is to blow towards the middle area of ​​the PTC heating element, which requires directional and focused air delivery. Therefore, by setting the sub-fan blades into a twisted structure, a focused and directional air delivery effect can be achieved.

[0022] As a further improvement of this utility model, the fixing member includes a long strip-shaped bracket, and the two ends of the bracket are respectively provided with a first locking structure and a second locking structure for limiting installation with the position to be installed.

[0023] As a further improvement of this utility model, the bracket is provided with a breathable structure.

[0024] As a further improvement of this utility model, the first locking structure includes a first mounting hole and a first positioning hole; and / or, the second locking structure includes a second mounting hole and a second positioning hole; a positioning post is provided at the installation position for engaging into the first positioning hole and / or the second positioning hole for installation and positioning.

[0025] As a further improvement of this utility model, the bracket is provided with a support frame, and the top of the support frame is provided with a wire-clamping hook. A gap is left between the wire-clamping hook and the support frame to clamp the motor cable.

[0026] This utility model provides a space heater, comprising a shell, a PTC heating element, an inner lining plate, an air outlet grille, and the aforementioned fan structure; wherein:

[0027] The outer shell has an open-side structure;

[0028] The fan structure is fixed inside the housing;

[0029] The PTC heating element is installed on the front side of the fan structure;

[0030] The air outlet grille is installed at the opening of the outer casing via the inner lining plate.

[0031] This utility model of a heater, through its mother-and-child fan blade design and dual-motor drive, significantly improves the heat dissipation efficiency of the heater. In particular, for the middle area of ​​the PTC heating element, it not only effectively solves the problem of grille discoloration, but also improves the overall performance and service life of the heater, greatly reducing the maintenance and replacement costs caused by heat dissipation problems, while also improving the user experience and product aesthetics. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a three-dimensional structural diagram of the heater of this utility model;

[0034] Figure 2 This is a front view of the heater of this utility model with the air outlet grille and inner lining plate removed;

[0035] Figure 3 This is an exploded structural diagram of the heater of this utility model;

[0036] Figure 4 This is a three-dimensional structural diagram of the fan structure of this utility model;

[0037] Figure 5 This is a front view of the heater of this utility model, retaining only the fan structure;

[0038] Figure 6 yes Figure 5 Enlarged view of part A in the middle;

[0039] Figure 7 yes Figure 5 Enlarged view of part B in the middle;

[0040] Figure 8 This is a schematic diagram of the outer shell structure of the heater of this utility model.

[0041] In the picture:

[0042] 1. Outer shell;

[0043] 11. First positioning post;

[0044] 12. Second positioning post;

[0045] 13. Air inlet;

[0046] 14. Air intake grille;

[0047] 2. PTC heating element;

[0048] 3. Inner lining board;

[0049] 4. Air vent grille;

[0050] 10. Mother fan assembly;

[0051] 20. Sub-fan assembly;

[0052] 30. Bracket;

[0053] 40. Ventilation holes;

[0054] 50. First locking structure;

[0055] 501, First mounting hole;

[0056] 502, First positioning hole;

[0057] 60. Second locking structure;

[0058] 601, Second mounting hole;

[0059] 602. Second positioning hole;

[0060] 701. Support frame;

[0061] 702. Line hook. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0063] Example 1:

[0064] like Figures 1-8 As shown, this utility model provides a fan structure, including a fixing member, a female fan assembly 10, and a female fan assembly 20; wherein:

[0065] The fastener is installed at the installation location. Specifically, in this embodiment, the installation location can be the outer casing 1 of the heater; the fastener is installed inside the outer casing 1.

[0066] The female fan assembly 10 is installed on one side of the fixing member, away from the heat source; in this embodiment, the heat source can be the PTC heating element 2; the female fan assembly 10 is located on the side of the fixing member away from the PTC heating element 2;

[0067] The sub-fan assembly 20 is installed on the other side of the fixture, close to the heat source; specifically, the mother fan assembly 10 and the sub-fan assembly 20 are arranged opposite each other on both sides of the fixture, and are coaxially arranged.

[0068] The outer diameter D1 of the blades of the sub-fan assembly 20 is less than the outer diameter D3 of the blades of the mother fan assembly 10. With this structure, the airflow blown out by the mother fan assembly 10 can be directed by the sub-fan assembly 20 located at the center of the mother fan assembly 10 to the center of the PTC heating element 2, thereby reducing the temperature of the center of the PTC heating element 2 and preventing discoloration of the air outlet grille 4 at the corresponding position.

[0069] The fan structure provided by this utility model is a mother-daughter fan structure, including a mother fan assembly 10 and a daughter fan assembly 20. The outer diameter D1 of the blades of the daughter fan assembly 20 is less than the outer diameter D3 of the blades of the mother fan assembly 10, forming a structure of one large blade and one small blade. They are driven by two motors respectively. The large blade is located at the rear and provides the main airflow. The small blade is designed in front of the fixing component and close to the heat source. Its main function is to concentrate the airflow and blow it towards the middle area of ​​the heat source, thereby effectively improving the heat dissipation effect and preventing the grille from discoloring.

[0070] To achieve uniform airflow distribution, in this embodiment, the fan blades in the mother fan assembly 10 and the daughter fan assembly 20 rotate in opposite directions. For example... Figure 4 As shown, the fan blades in the mother fan assembly 10 have a large curvature to provide basic airflow, while the fan blades in the daughter fan assembly 20 have a small curvature to achieve the effect of blowing air towards the center of the PTC heating element 2.

[0071] This structural design allows for more even airflow distribution, enabling more airflow to reach the central area of ​​the heat source. This reduces the risk of the grille discoloration due to high temperatures in the central area and extends the lifespan of the heater.

[0072] like Figure 4 As shown, in an optional embodiment of the present invention, the female fan assembly 10 includes a female fan blade and a first motor; the first motor is fixed on one side of the fixing member, and the female fan blade is mounted on the first motor;

[0073] like Figure 4 As shown, the sub-fan assembly 20 includes sub-fan blades and a second motor; the second motor is fixed to the other side of the fixing member, and the sub-fan blades are mounted on the second motor. The first motor and the second motor are coaxially arranged, which makes the sub-fan blades and the main fan blades coaxial.

[0074] like Figure 8 As shown, the mother fan blade introduces the air outside the outer casing 1 into the outer casing 1 of the heater through the air inlet grille 14 at the air inlet 13, and sends it out to the front of the fixing member. When the airflow passes through the position of the sub-fan blade, the rotation of the sub-fan blade will introduce this part of the airflow inward and blow it out to the front, and send it into the middle area of ​​the PTC heating element 2.

[0075] This invention employs a dual-motor design, which drives the sub-fan blades and the main fan blades respectively, enabling more efficient and precise airflow control.

[0076] To achieve airflow to the central area of ​​the PTC heating element 2, in this embodiment, the outer diameter D1 of the sub-fan blade is less than or equal to the inner diameter D2 of the mother fan blade. It should be noted that the airflow emitted by the rotating fan blades gradually expands outwards with distance. Therefore, when the sub-fan blades are close to the heating element, the airflow can pass through the corresponding central position of the PTC heating element 2, thereby reducing the temperature at that central position.

[0077] With this structural design, the large fan blade, or mother fan blade, provides the basic airflow, while the small fan blade, or daughter fan blade, focuses on guiding the airflow to the central area of ​​the heat source. This structure ensures uniform heat dissipation of the entire heat source. By improving the airflow distribution, the temperature in the central area of ​​the heat source can be significantly reduced, thereby solving the problem of grille discoloration.

[0078] As an optional embodiment of this utility model, in order to increase the basic air supply flow rate, the main fan blade is an arc-shaped fan blade structure; furthermore, the main fan blade has a smooth arc structure, which can achieve stable airflow, large flow rate, and low noise.

[0079] In order to deliver air to the central area of ​​the PTC heating element 2, the sub-fan blades are twisted. Furthermore, the sub-fan blades are slightly twisted along the length direction, which enables directional airflow delivery, focusing, and high efficiency.

[0080] By setting the main fan blades into a large arc shape, a larger airflow surface can be formed, covering a wider area to achieve large-area air delivery; while the purpose of the sub-fan blades is to blow towards the middle area of ​​the PTC heating element, which requires directional and focused air delivery. Therefore, by setting the sub-fan blades into a twisted structure, a focused and directional air delivery effect can be achieved.

[0081] like Figures 4-7 As shown, as a further improvement of this utility model, the fastener includes a long strip plate bracket 30, the length of which is adapted to the inner diameter of the outer shell 1; a first locking structure 50 and a second locking structure 60 are respectively provided at both ends of the bracket 30 to limit the installation of the bracket 30 and the outer shell 1.

[0082] In order to facilitate the smooth passage of airflow and improve the coverage area, a breathable structure is provided on the bracket 30 in this embodiment.

[0083] Specifically, the ventilated structure includes vents 40 symmetrically arranged on both sides of the support 30. The arrangement of the vents 40 not only ensures an increased airflow area and reduces obstruction of airflow caused by the support 30, but also reduces the weight of the support 30.

[0084] like Figure 4 , Figure 5 and Figure 7 As shown, in this embodiment, the first locking structure 50 includes a first mounting hole 501 and a first positioning hole 502; a first positioning post 11 is provided inside the outer shell 1 for being inserted into the first positioning hole 502 for installation and positioning; wherein, in order to improve the applicability and flexibility of installation and facilitate adjustment of the installation position, the first mounting hole 501 is an oblong hole, the long axis of which extends parallel to the length extension direction of the bracket 30, so as to facilitate adjustment of the installation position of the bracket 30 inside the outer shell 1; the first positioning hole 502 is also an oblong hole, which is used to pass through the cylindrical first positioning post 11 inside the outer shell 1, thereby performing preliminary positioning before the bracket 30 is installed.

[0085] like Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, the second locking structure 60 includes a second mounting hole 601 and a second positioning hole; a second positioning post 60212 is provided inside the outer shell 1 for being inserted into the second positioning hole for installation and positioning; wherein, in order to improve the applicability and flexibility of installation and facilitate adjustment of the installation position, the second mounting hole 601 is an oblong hole, the long axis of which extends parallel to the length extension direction of the bracket 30, so as to facilitate adjustment of the installation position of the bracket 30 in the outer shell 1; the second positioning hole is an open semi-circular hole, which is used to be inserted from the side into the cylindrical second positioning post 60212 inside the outer shell 1, thereby performing preliminary positioning before the bracket 30 is installed.

[0086] Because a motor is installed on the bracket 30, and the motor requires wiring, in order to facilitate the fixing and limiting of the cable, in this embodiment, a support frame 701 is provided on the bracket 30 at one of the ventilation holes 40. A cable hook 702 is provided on the top of the support frame 701, and a gap is left between the cable hook 702 and the support frame 701 to hold the motor cable.

[0087] Example 2:

[0088] like Figures 1-8 As shown, this utility model provides a space heater. The working principle of the space heater is as follows:

[0089] The internal PTC heating element 2 generates heat, which is then used by the fan to draw cool air from outside into the machine. The drawn-in cool air is heated by the PTC heating element 2. The heated air is then blown out through the air outlet, thus achieving the purpose of heating the room. Both the fan and the PTC heating element 2 are located in the middle of the machine. If there were only the main fan blades, the middle area of ​​the PTC heating element 2 would not receive airflow, resulting in poor heat dissipation, which in turn would cause the air outlet grille 4 of the injection molded part to discolor due to high temperature.

[0090] To address the issues of grille discoloration and poor heat dissipation in the center, the heater in this invention includes a shell 1, a PTC heating element 2, an inner lining plate 3, an air outlet grille 4, and a fan structure; wherein:

[0091] The outer shell 1 has an open structure on one side, and the sealed side is provided with an air inlet and an air inlet grille;

[0092] The fan structure is fixed inside the housing 1, near the air inlet side;

[0093] PTC heating element 2 is installed on the front side of the fan structure;

[0094] The air vent grille 4 is installed at the opening of the outer casing 1 via the inner lining plate 3.

[0095] Specifically, such as Figures 1-8 As shown, the fan structure includes a fixing component, a mother fan assembly 10, and a daughter fan assembly 20; wherein:

[0096] The fastener is installed inside the housing 1;

[0097] The mother fan assembly 10 is installed on one side of the fixture, away from the PTC heating element 2;

[0098] The sub-fan assembly 20 is mounted on the other side of the fixture, close to the PTC heating element 2;

[0099] Specifically, the mother fan assembly 10 and the child fan assembly 20 are arranged opposite each other on both sides of the fixing member, and the two are coaxially arranged.

[0100] The blade diameter of the sub-fan assembly 20 is smaller than that of the fan blade of the mother fan assembly 10. With this structure, the airflow blown out by the mother fan assembly 10 can be directed by the sub-fan assembly 20 located at the center of the mother fan assembly 10 to the center of the PTC heating element 2, thereby reducing the temperature of the center of the PTC heating element 2 and preventing discoloration of the air outlet grille 4 at the corresponding position.

[0101] The fan structure provided by this utility model is a mother-daughter fan structure, including a mother fan assembly 10 and a daughter fan assembly 20. The diameter of the fan blades of the daughter fan assembly 20 is smaller than that of the fan blades of the mother fan assembly 10, forming a structure of one large fan blade and one small fan blade. They are driven by two motors respectively. The large fan blade is located at the rear and provides the main airflow. The small fan blade is designed in front of the fixing component, close to the PTC heating element 2. Its main function is to gather the airflow and blow it towards the middle area of ​​the PTC heating element 2, thereby effectively improving the heat dissipation effect and preventing the grille from discoloring.

[0102] To achieve uniform airflow distribution, in this embodiment, the fan blades in the mother fan assembly 10 and the daughter fan assembly 20 rotate in opposite directions. For example... Figure 4As shown, the fan blades in the mother fan assembly 10 have a large curvature to provide basic airflow, while the fan blades in the daughter fan assembly 20 have a small curvature to achieve the effect of blowing air towards the center of the PTC heating element 2.

[0103] This structural design allows for more even airflow distribution, enabling more airflow to reach the central area of ​​the heat source. This reduces the risk of the grille discoloration due to high temperatures in the central area and extends the lifespan of the heater.

[0104] like Figure 4 As shown, in an optional embodiment of the present invention, the female fan assembly 10 includes a female fan blade and a first motor; the first motor is fixed on one side of the fixing member, and the female fan blade is mounted on the first motor;

[0105] like Figure 4 As shown, the sub-fan assembly 20 includes sub-fan blades and a second motor; the second motor is fixed to the other side of the fixing member, and the sub-fan blades are mounted on the second motor. The first motor and the second motor are coaxially arranged, which makes the sub-fan blades and the main fan blades coaxial.

[0106] like Figure 8 As shown, the mother fan blade introduces the air outside the outer casing 1 into the outer casing 1 of the heater through the air inlet grille 14 at the air inlet 13, and sends it out to the front of the fixing member. When the airflow passes through the position of the sub-fan blade, the rotation of the sub-fan blade will introduce this part of the airflow inward and blow it out to the front, and send it into the middle area of ​​the PTC heating element 2.

[0107] This invention employs a dual-motor design, which drives the sub-fan blades and the main fan blades respectively, enabling more efficient and precise airflow control.

[0108] In order to achieve air delivery to the central area of ​​the PTC heating element 2, in this embodiment, the outer diameter of the sub-fan blade is less than or equal to the inner diameter of the mother fan blade. By adding a sub-fan blade in the middle of the mother fan blade, the air can be directed towards the central part.

[0109] With this structural arrangement, the large fan blade, also known as the mother fan blade, provides the basic airflow, while the small fan blade, also known as the daughter fan blade, focuses on guiding the airflow to the middle area of ​​the PTC heating element 2. This structure ensures uniform heat dissipation of the entire PTC heating element 2. By improving the airflow distribution, the temperature in the middle area of ​​the PTC heating element 2 can be significantly reduced, thereby solving the problem of grille discoloration.

[0110] As an optional embodiment of this utility model, in order to increase the basic air supply flow rate, the mother fan blade is an arc-shaped fan blade structure;

[0111] In order to deliver air to the central area of ​​the PTC heating element 2, the sub-fan blades are of a twisted shape.

[0112] like Figures 4-7 As shown, as a further improvement of this utility model, the fastener includes a long strip plate bracket 30, the length of which is adapted to the inner diameter of the outer shell 1; a first locking structure 50 and a second locking structure 60 are respectively provided at both ends of the bracket 30 to limit the installation of the bracket 30 and the outer shell 1.

[0113] In order to facilitate the smooth passage of airflow and improve the coverage area, a breathable structure is provided on the bracket 30 in this embodiment.

[0114] Specifically, the ventilated structure includes vents 40 symmetrically arranged on both sides of the support 30. The arrangement of the vents 40 not only ensures an increased airflow area and reduces obstruction of airflow caused by the support 30, but also reduces the weight of the support 30.

[0115] like Figure 4 , Figure 5 and Figure 7 As shown, in this embodiment, the first locking structure 50 includes a first mounting hole 501 and a first positioning hole 502; a first positioning post 11 is provided inside the outer shell 1 for being inserted into the first positioning hole 502 for installation and positioning; wherein, in order to improve the applicability and flexibility of installation and facilitate adjustment of the installation position, the first mounting hole 501 is an oblong hole, the long axis of which extends parallel to the length extension direction of the bracket 30, so as to facilitate adjustment of the installation position of the bracket 30 inside the outer shell 1; the first positioning hole 502 is also an oblong hole, which is used to pass through the cylindrical first positioning post 11 inside the outer shell 1, thereby performing preliminary positioning before the bracket 30 is installed.

[0116] like Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, the second locking structure 60 includes a second mounting hole 601 and a second positioning hole; a second positioning post 60212 is provided inside the outer shell 1 for being inserted into the second positioning hole for installation and positioning; wherein, in order to improve the applicability and flexibility of installation and facilitate adjustment of the installation position, the second mounting hole 601 is an oblong hole, the long axis of which extends parallel to the length extension direction of the bracket 30, so as to facilitate adjustment of the installation position of the bracket 30 in the outer shell 1; the second positioning hole is an open semi-circular hole, which is used to be inserted from the side into the cylindrical second positioning post 60212 inside the outer shell 1, thereby performing preliminary positioning before the bracket 30 is installed.

[0117] Because a motor is installed on the bracket 30, and the motor requires wiring, in order to facilitate the fixing and limiting of the cable, in this embodiment, a support frame 701 is provided on the bracket 30 at one of the ventilation holes 40. A cable hook 702 is provided on the top of the support frame 701, and a gap is left between the cable hook 702 and the support frame 701 to hold the motor cable.

[0118] In use, after the two ends of the bracket 30 are assembled and positioned with the first positioning post 11 and the second positioning post 60212 on the outer casing 1 through the first positioning hole 502 and the second positioning hole respectively, the waist-shaped first mounting hole 501 and the second mounting hole 601 at the upper and lower ends are fixedly installed on the outer casing 1 with screws, that is, installed inside the whole machine. Figure 5 As shown. The first motor drives the main fan blade, and the second motor drives the sub-fan blade. The first motor is installed at the rear of the bracket 30, and the second motor is installed at the front of the bracket 30. The main fan blade is installed at the rear of the bracket 30, responsible for generating the main airflow forward, but the PTC heating element 2 at the corresponding position of the sub-fan blade area is not blown away to remove heat. The sub-fan blade is installed at the front of the middle position of the bracket 30, and its function is to guide the airflow to the PTC heating element 2 at the corresponding position of the sub-fan blade area. This removes heat from this area and blows it forward, ensuring that heat is removed from every position of the PTC heating element 2, preventing the front injection-molded air outlet grille 4 from discoloring due to high temperature.

[0119] This utility model of a heater features a mother-and-child fan blade design and a dual-motor drive. One large fan blade and one small fan blade are driven by two separate motors. The large fan blade, located at the rear, provides the main airflow. The small fan blade is cleverly designed at the front of the bracket 30, its main function being to concentrate the airflow and direct it towards the central area of ​​the PTC heating element 2. This significantly improves the heater's heat dissipation efficiency, particularly targeting the central area of ​​the PTC heating element 2. It effectively solves the problem of grille discoloration, enhances the overall performance and lifespan of the heater, and greatly reduces maintenance and replacement costs caused by heat dissipation issues. Simultaneously, it improves the user experience and product aesthetics.

[0120] First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.

[0121] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0122] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0123] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0124] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0125] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 present 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0126] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fan structure, characterized in that, Includes fasteners, main fan assembly, and sub-fan assembly; wherein: The fastener is installed at the installation location; The female fan assembly is mounted on one side of the fixing member, away from the heat source; The sub-fan assembly is mounted on the other side of the fixture, close to the heat source; The outer diameter D1 of the blades of the sub-fan assembly is less than the outer diameter D3 of the blades of the mother fan assembly.

2. The fan structure according to claim 1, characterized in that, The fan blades in the mother fan assembly and the child fan assembly rotate in opposite directions.

3. The fan structure according to claim 1, characterized in that, The mother fan assembly includes a mother fan blade and a first motor; the first motor is fixed to the fixing member, and the mother fan blade is mounted on the first motor; and / or, the child fan assembly includes a child fan blade and a second motor; the second motor is fixed to the fixing member, and the child fan blade is mounted on the second motor.

4. The fan structure according to claim 3, characterized in that, The outer diameter of the sub-fan blade, D1, is less than or equal to the inner diameter of the mother fan blade, D2.

5. The fan structure according to claim 3, characterized in that, The mother fan blade is an arc-shaped fan blade structure, and / or the child fan blade is a twisted fan blade structure.

6. The fan structure according to claim 1, characterized in that, The fastener includes a bracket, and the bracket has a first locking structure and a second locking structure at both ends for limiting installation with the position to be installed.

7. The fan structure according to claim 6, characterized in that, The support frame is equipped with a breathable structure.

8. The fan structure according to claim 6, characterized in that, The first locking structure includes a first mounting hole and a first positioning hole; and / or, the second locking structure includes a second mounting hole and a second positioning hole; a positioning post is provided at the installation position for engaging with the first positioning hole and / or the second positioning hole for installation and positioning.

9. The fan structure according to claim 6, characterized in that, The bracket is provided with a support frame, and the support frame is provided with a wire-clamping hook. A gap is left between the wire-clamping hook and the support frame to clamp the motor cable.

10. A space heater, characterized in that, It includes a housing, a PTC heating element, an inner liner, an air outlet grille, and a fan structure as described in any one of claims 1-9; wherein: The outer shell has an open-side structure; The fan structure is fixed inside the housing; The PTC heating element is installed on the front side of the fan structure; The air outlet grille is installed at the opening of the outer casing via the inner lining plate.

Images