Warmer

Abstract

The utility model discloses a kind of warmers, the warmer includes: shell, shell is equipped with air duct space, the shell is equipped with with the air duct space intercommunication air inlet and air outlet;Fan wheel assembly, the fan wheel assembly is located in the air duct space;Heating assembly, heating assembly is located in the air duct space and between the fan wheel assembly and the air outlet, heating assembly includes at least one PTC heating piece, the heating assembly has wind-permeable area, in first direction, at least part of the wind-permeable area is opposite with the air outlet arrangement, the first direction with the second direction intersection;On projection plane perpendicular to the first direction, the total area of the orthographic projection of the wind-permeable area is A1, the total area of the orthographic projection of the heating assembly is A2, A1 / A2=70%.The warmer proposed by the utility model, the aperture ratio A1 / A2 of heating assembly is 70%, effectively reduce the wind resistance of heating assembly, improve the air outlet effect of warmer.

Description

Technical Field

[0001] This utility model relates to the field of household appliances, and in particular to a heater. Background Technology

[0002] In related technologies, heaters include a fan and a heating element. When a user uses a heater, the fan and the heating element work. The fan drives air through the heating element, and the air heated by the heating element is blown into the room to increase the room temperature. However, the heating element has a large air resistance, resulting in poor airflow effect of the heater. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a heater in which the perforation ratio A1 / A2 of the heating element is ≥70%, which effectively reduces the wind resistance of the heating element and improves the air output effect of the heater.

[0004] A heater according to an embodiment of the present invention includes: a housing having an air duct space, the housing having an air inlet and an air outlet communicating with the air duct space; a fan assembly disposed within the air duct space; and a heating assembly disposed within the air duct space and located between the fan assembly and the air outlet. The heating assembly includes at least one PTC heating element, each PTC heating element including a PTC element and an electrode plate clamping the PTC element in a second direction. The heating assembly has a ventilated area for heat exchange with the electrode plate. In a first direction, at least a portion of the ventilated area is directly opposite the air outlet. The first direction intersects the second direction. On a projection plane perpendicular to the first direction, the total area of ​​the orthographic projection of the ventilated area is A1, and the total area of ​​the orthographic projection of the heating assembly is A2, where A1 / A2 ≥ 70%.

[0005] According to the present invention, each PTC element in the heater is electrically connected to two electrode plates. These two electrode plates act as conductive media for connection to an external power source and also transfer the heat generated by the PTC element. This increases the heat dissipation area of ​​the PTC heating element, thereby improving its heating efficiency and uniformity. By providing a ventilation area, air can pass through the heating assembly, increasing the contact area between the heating assembly and the air, improving the heater's heating effect, and reducing the air resistance of the heating assembly, thus improving the heater's airflow. Furthermore, in this embodiment, A1 / A2 ≥ 70%, further reducing the air resistance of the heating assembly and effectively improving the heater's airflow.

[0006] In some embodiments, the heating assembly further includes a heat sink connected to the electrode sheet, the heat sink having or participating in defining the ventilation area.

[0007] In some embodiments, the heating assembly includes a plurality of electrode plates spaced apart along a second direction, wherein two electrode plates are provided with external connectors for connection to an external power source; the heat sink includes at least one heat sink strip, each heat sink strip extending in a zigzag pattern along a third direction to form a corrugated structure, each heat sink strip being sandwiched between adjacent electrode plates, and each heat sink strip and adjacent electrode plate defining at least a portion of the ventilation area.

[0008] In some embodiments, there are multiple PTC heating elements, and in the second direction, each PTC heating element has at least one heat dissipation strip on both sides.

[0009] In some embodiments, the heating assembly further includes a first side plate and a second side plate. In the third direction, each heat sink is provided with a first side plate and a second side plate on both sides, and the first side plate and the second side plate are respectively connected to at least one of the electrode plates.

[0010] In some embodiments, the thickness of the corrugated strip is H, 0.2mm≤H≤0.5mm; and / or, the crest spacing of the corrugated strip is B, 3mm≤B≤8mm; and / or, in the second direction, the height of the corrugated strip is C, 5mm≤C≤20mm.

[0011] In some embodiments, the thickness of the corrugated strip is H, 0.25mm≤H≤0.28mm; and / or, the crest spacing of the corrugated strip is B, 6mm<B≤8mm; and / or, in the second direction, the height of the corrugated strip is C, 8mm≤C≤10mm.

[0012] In some embodiments, the area of ​​the duct space used to accommodate the heating component is a accommodating area, and the accommodating area is provided with a guide portion on the side facing the impeller assembly. In the first direction, the cross-sectional area of ​​the end of the guide portion connected to the accommodating area is larger than the cross-sectional area of ​​the rest.

[0013] In some embodiments, in the first direction, a portion of the heating assembly is positioned directly opposite the air guide portion.

[0014] In some embodiments, the cross-sectional area of ​​the air guide gradually increases in the direction toward the receiving area.

[0015] In some embodiments, the maximum cross-sectional area of ​​the air guide is A3, the minimum cross-sectional area of ​​the air guide is A4, and 1 < A3 / A4 ≤ 1.5.

[0016] In some embodiments, on the first directional panel, the cross-sectional area of ​​the portion of the air duct space located on the side of the heating assembly facing the air outlet remains unchanged.

[0017] In some embodiments, in the first direction, the cross-sectional area of ​​the portion of the duct space located on the side of the heating assembly facing the air outlet gradually decreases.

[0018] In some embodiments, the opening area of ​​the receiving area facing the air outlet is A5, and the opening area of ​​the air outlet is A6, where 1 < A5 / A6 ≤ 1.5.

[0019] In some embodiments, the maximum distance between the heating component and the inner wall of the receiving area is D, where D ≤ 2 mm.

[0020] In some embodiments, there are multiple wind turbine assemblies and multiple air guides, with each of the multiple air guides and multiple wind turbine assemblies being configured in a one-to-one correspondence.

[0021] In some embodiments, a portion of the inner wall of the air duct space is recessed to form a groove, the groove extending at least along the second direction, and at least a portion of the heating assembly is located within the groove.

[0022] In some embodiments, the groove in the direction toward the air outlet includes a first inner wall, a second inner wall, and a third inner wall connected in sequence. The first inner wall is inclined to help define an air guide portion, the second inner wall helps define a receiving area for accommodating the heating component, and the third inner wall is inclined such that the cross-sectional area of ​​the portion of the air duct space located on the side of the heating component facing the air outlet gradually decreases.

[0023] In some embodiments, the heater is configured to have a warm air state and a cold air state, wherein in the warm air state both the impeller assembly and the heating assembly are operational, and in the cold air state the heating assembly is not operational while the impeller assembly is operational.

[0024] In some embodiments, the rotational speed of the wind turbine assembly is 500 r / min to 700 r / min in the warm air state; and / or, the rotational speed of the wind turbine assembly is 1300 r / min to 1500 r / min in the cold air state.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a schematic diagram of a heater according to an embodiment of the present utility model;

[0028] Figure 2 This is an exploded view of a heater according to an embodiment of the present utility model;

[0029] Figure 3 This is a cross-sectional view of a heater according to an embodiment of the present utility model;

[0030] Figure 4 This is a schematic diagram of a heating assembly according to some embodiments of the present invention;

[0031] Figure 5 yes Figure 4 Enlarged view of the middle V section;

[0032] Figure 6 This is a comparative schematic diagram of a heater according to some embodiments of the present invention and heaters in related technologies;

[0033] Figure 7 This is a diagram of the end of the air duct space. Figure 1 ;

[0034] Figure 8 This is a diagram of the end of the air duct space. Figure 2 ;

[0035] Figure 9 This is a diagram of the end of the air duct space. Figure 3 ;

[0036] Figure 10 This is a diagram of the end of the air duct space. Figure 4 ;

[0037] Figure 11 This is a cross-sectional view of a heater according to other embodiments of the present invention;

[0038] Figure 12 This is a front view of the heating assembly in some embodiments of the present invention;

[0039] Figure 13 This is a cross-sectional view of the heating assembly in some embodiments of this utility model;

[0040] Figure 14 This is a cross-sectional view of the heating assembly in some other embodiments of the present invention.

[0041] Reference numerals: 100, Heater; 1, Shell; 11, Air duct space; 111, Air inlet; 112, Air outlet; 113, Receiving area; 114, Air guide; 13, Front shell; 14, Rear shell; 141, Air inlet grille; 15, First air duct assembly; 16, Second air duct assembly; 161, Air outlet grille; 17, Groove; 171, First inner wall; 172, Second inner wall; 173, Third inner wall; 2, Fan assembly; 3, Heating assembly; 31, PTC heating element; 311, Electrode plate; 312, PTC element; 313, External connector; 36, Ventilation area; 361, Ventilation hole; 37, Heat dissipation strip; 38, First side plate; 39, Second side plate. Detailed Implementation

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] 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," etc., indicating the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0045] The following is for reference. Figures 1-14 A heater 100 according to an embodiment of the present utility model is described.

[0046] Reference Figure 1 , Figure 2 and Figure 3 The heater according to an embodiment of the present invention includes: a housing 1, a fan assembly 2, and a heating assembly 3; wherein, the housing 1 is provided with an air duct space 11, the air duct space 11 is provided with an air inlet 111 and an air outlet 112, and the fan assembly 2 is disposed within the air duct space 11 and located between the air inlet 111 and the air outlet 112. When the fan assembly 2 is working, the fan assembly 2 drives air to enter the air duct space 11 from the air inlet 111, and then blows it towards the user through the air outlet 112.

[0047] The heating component 3 is located in the air duct space 11 and between the impeller assembly 2 and the air outlet 112. When the heater 100 is used for heating, the impeller assembly 2 and the heating component 3 work. The impeller assembly 2 drives the air to flow towards the heating component 3. The air heated by the heating component 3 flows into the room through the air outlet 112 to increase the indoor temperature.

[0048] Reference Figure 4 and Figure 5 The heating assembly 3 includes at least one PTC heating element 31, and each PTC heating element 31 includes a PTC element 312 and an electrode sheet 311 that clamps the PTC element 312 in a second direction.

[0049] Each PTC element 312 is electrically connected to two electrode plates 311. The two electrode plates 311 can act as conductive media to be electrically connected to an external power source. When the external power source is turned on, current can flow into the PTC element 312, and the PTC element 312 can generate heat after being energized, thereby realizing the heating function of the PTC heating element 31. In addition, the two electrode plates 311 can also transfer the heat generated by the PTC element 312, which helps to increase the heat dissipation area of ​​the PTC heating element 31, thereby improving the heating efficiency and heating uniformity of the PTC heating element 31.

[0050] Reference Figures 3-5 The heating component 3 has a ventilation area 36 that exchanges heat with the electrode plate 311. In a first direction, at least a portion of the ventilation area 36 is directly opposite the air outlet 112. The first direction intersects with the second direction. On a projection plane perpendicular to the first direction, the total area of ​​the orthographic projection of the ventilation area 36 is A1, and the total area of ​​the orthographic projection of the heating component 3 is A2, where A1 / A2≥70%.

[0051] It should be noted that the ventilation area 36 may include a through hole penetrating the PTC heating element 31, and may also include an air guide channel defined between two adjacent PTC heating elements 31. Furthermore, the ventilation area 36 may include a ventilation hole 361 penetrating a heat sink connected to the PTC heating element 31 for heat exchange. It should be understood that the ventilation area 36 may also include other channels or holes, as long as air can pass through the ventilation area 36 and pass through the heating assembly 3 in the first direction; this invention does not impose any limitations on this.

[0052] It should also be noted that the total projected area A2 of the heating component 3 includes: the total projected area A1 of the ventilation area 36 and the projected area of ​​each PTC heating element 31. In some embodiments, the heating component 3 further includes a heat sink; in this embodiment, the total projected area A2 of the heating component 3 also includes the projected area of ​​each heat sink.

[0053] When the fan assembly 2 is working, it drives airflow toward the heating assembly 3. At least a portion of the air enters the ventilation area 36 of the heating assembly 3. Because at least a portion of the ventilation area 36 is directly opposite the air outlet 112, the air passing through the ventilation area 36 can be directly discharged through the air outlet 112. By setting the ventilation area 36 to allow air to pass through the heating assembly 3, not only is the contact area between the heating assembly 3 and the air increased, which is beneficial to improving the heating effect of the heater, but the wind resistance of the heating assembly 3 is also reduced, which improves the air outlet effect of the heater. Furthermore, in this embodiment of the present invention, A1 / A2 ≥ 70%, which further reduces the wind resistance of the heating assembly 3 and further improves the air outlet effect of the heater 100.

[0054] It should be noted that the projection plane perpendicular to the first direction can be parallel to the air outlet 112, and there can be one or more PTC heating elements 31.

[0055] According to the heater of this utility model embodiment, each PTC element 312 is electrically connected to two electrode plates 311. The two electrode plates 311 can act as a conductive medium to be electrically connected to an external power source. The two electrode plates 311 can also transfer the heat generated by the PTC element 312, which helps to increase the heat dissipation area of ​​the PTC heating element 31, thereby improving the heating efficiency and heating uniformity of the PTC heating element 31. By setting a ventilation area 36, ​​air can pass through the heating component 3, which not only increases the contact area between the heating component 3 and the air, which helps to improve the heating effect of the heater, but also reduces the wind resistance of the heating component 3, improving the air outlet effect of the heater. Furthermore, in this utility model embodiment, A1 / A2≥70%, further reducing the wind resistance of the heating component 3 and effectively improving the air outlet effect of the heater 100.

[0056] In some further embodiments, 70% ≤ A1 / A2 ≤ 90%.

[0057] If A1 / A2 is greater than 90%, the heating element 3 will have poor strength and be prone to deformation, affecting the lifespan of the heater. In this embodiment of the invention, 70% ≤ A1 / A2 ≤ 90% not only reduces the wind resistance of the heating element 3 but also ensures the strength of the heating element 3, thus guaranteeing the reliability of the heater 100.

[0058] In some specific embodiments, A1 / A2 is any one of 70%, 70.4%, 72.6%, 76.7%, 79%, 81%, 84%, 87%, 89%, 90%, or a range between any two.

[0059] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, the housing 1 is provided with a first air duct assembly 15 and a second air duct assembly 16 connected to each other. The first air duct assembly 15 and the second air duct assembly 16 define an air duct space 11. The first air duct assembly 15 is connected to the air inlet 111, and the second air duct assembly 16 is connected to the air outlet 112. The impeller assembly 2 is located in the first air duct assembly 15, and the heating assembly 3 is located in the second air duct assembly 16.

[0060] By assembling and cooperating the first air duct component 15 and the second air duct component 16 to form the air duct space 11, the difficulty of mold making and the cost can be reduced. Specifically, the first air duct component 15 and the second air duct component 16 can be detachably connected by a snap-fit ​​structure, which is beneficial for later maintenance or replacement. In other embodiments, the first air duct component 15 and the second air duct component 16 can also be integrally molded parts, or the first air duct component 15 and the second air duct component 16 can be fixedly connected as one piece, for example, by means of screws, glue welding, etc. This utility model does not limit this.

[0061] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, the housing 1 includes a front housing 13 and a rear housing 14 connected together, defining an installation space between the front housing 13 and the rear housing 14 for the exhaust fan assembly 2 and the heating assembly 3, wherein the front housing 13 is provided with an air outlet 112 and the rear housing 14 is provided with an air inlet 111.

[0062] By assembling and fitting the front shell 13 and the rear shell 14 to form the installation space for the impeller assembly 2 and the heating assembly 3, the difficulty of mold making and the cost can be reduced. Specifically, the front shell 13 and the rear shell 14 are connected by fasteners such as screws and bolts, which facilitates later maintenance or replacement. In other embodiments, the front shell 13 and the rear shell 14 can also be connected by a snap-fit ​​structure or other detachable methods, and this utility model does not limit this.

[0063] In some embodiments, an air outlet grille 161 is provided at the air outlet 112 and an air inlet grille 141 is provided at the air inlet 111. The air inlet grille 141 and the air outlet grille 161 help reduce the risk of dust or water and other debris entering the housing 1, thereby improving the cleanliness of the housing 1 and reducing the risk of components installed in the housing 1 (such as the impeller assembly 2 and the heating assembly 3) malfunctioning due to water or dust ingress, thus ensuring the service life and safety of the heater 100.

[0064] In some specific embodiments, the air inlet grille 141 is disposed on the rear shell 14, and the air outlet grille 161 is disposed on the second air duct assembly 16. In other embodiments, the air inlet grille 141 may be disposed on the rear shell 14, and the air outlet grille 161 may be disposed on the front shell 13; this utility model does not limit this to any particular embodiment.

[0065] In some embodiments, the heater is configured to have a warm air state and a cold air state. In the warm air state, both the impeller assembly 2 and the heating assembly 3 are working, while in the cold air state, the impeller assembly 2 is working and the heating assembly 3 is not working.

[0066] In the warm air mode, the fan assembly 2 and the heating assembly 3 work. The fan assembly 2 drives the air to flow towards the heating assembly 3. The air heated by the heating assembly 3 flows into the room through the air outlet 112 to increase the indoor temperature.

[0067] In cold air mode, the fan assembly 2 is working and the heating assembly 3 is not working. The fan assembly 2 drives the airflow to the heating assembly 3. Because the heating assembly 3 is not working, the air blown out of the air outlet 112 can be used for cooling.

[0068] Through the above technical solution, the heater can not only be used for heating in low-temperature environments, but also for cooling in high-temperature environments, effectively improving the practicality of the heater. Furthermore, in this embodiment, A1 / A2 ≥ 70%, effectively reducing the wind resistance of the heating element 3 and improving the cooling effect of the heater 100 in cold air conditions.

[0069] Reference Figure 4 and Figure 5In some further embodiments, the heating assembly 3 also includes a heat sink connected to the electrode sheet 311, the heat sink having or participating in defining a ventilation area 36.

[0070] In this embodiment of the invention, the heat dissipation effect of the electrode plate 311 is effectively improved by the heat dissipation component connected to the electrode plate 311, thereby improving the heating effect of the heater 100 in warm air mode. It also helps to improve the uniformity of the air outlet temperature of the heater 100.

[0071] Reference Figure 4 and Figure 5 In some embodiments, the heating assembly 3 includes a plurality of electrode plates 311 spaced apart along a second direction, wherein at least two electrode plates 311 are provided with external connectors 313 for connection to an external power source. The heat sink includes at least one heat sink strip 37, each heat sink strip 37 extending in a zigzag manner along a third direction to form a corrugated structure, and each heat sink strip 37 being sandwiched between adjacent electrode plates 311.

[0072] For example, refer to Figure 4 The heating assembly 3 includes a first electrode plate 311 to a ninth electrode plate 311 arranged sequentially in a second direction. A heat dissipation strip 37 is provided between the first electrode plate 311 and the second electrode plate 311, between the second electrode plate 311 and the third electrode plate 311, between the third electrode plate 311 and the fourth electrode plate 311, between the fourth electrode plate 311 and the fifth electrode plate 311, between the fifth electrode plate 311 and the sixth electrode plate 311, between the sixth electrode plate 311 and the seventh electrode plate 311, between the seventh electrode plate 311 and the eighth electrode plate 311, and between the eighth electrode plate 311 and the ninth electrode plate 311.

[0073] The second, fifth, and eighth electrode plates 311 are equipped with external connectors 313. In this example, the third, fourth, and PTC elements 312 between the third and fourth electrode plates 311 form a PTC heating element 31, which is powered by the second and fifth electrode plates 311. Similarly, the sixth, seventh, and PTC elements 312 between the sixth and seventh electrode plates 311 also form a PTC heating element 31, which is powered by the eighth and fifth electrode plates 311.

[0074] For example, the heating assembly 3 includes a first electrode plate 311, a second electrode plate 311 and a third electrode plate 311. Both the first electrode plate 311 and the second electrode plate 311 are provided with external connectors 313. The PTC element 312 is located between the first electrode plate 311 and the second electrode plate 311. The heat sink 37 is located between the second electrode plate 311 and the third electrode plate 311.

[0075] For example, the heating assembly 3 includes a first electrode plate 311 to a fourth electrode plate 311, wherein the first electrode plate 311 and the fourth electrode plate 311 are provided with an external connector 313, a heat dissipation strip 37 is provided between the first electrode plate 311 and the second electrode plate 311, a PTC element 312 is provided between the second electrode plate 311 and the third electrode plate 311, and a heat dissipation strip 37 is provided between the third electrode plate 311 and the fourth electrode plate 311.

[0076] It should be understood that the heating assembly 3 may also include five, six, ten, or other numbers of electrode plates 311, and the present invention does not limit the number of electrode plates 311. The embodiments of the present invention also do not limit the number of heat dissipation strips 37. The present invention also does not limit the number of PTC heating elements 31, as long as, in the second direction, the PTC element 312 is located between two adjacent external connectors 313, so that the PTC element 312 can be normally energized, ensuring the normal operation of the heating assembly 3.

[0077] Reference Figure 4 and Figure 5 Each heat sink 37 is sandwiched between adjacent electrode plates 311, and each heat sink 37 and adjacent electrode plates 311 define at least a portion of the ventilation area 36.

[0078] Specifically, in the second direction, a plurality of ventilation holes 361 are defined between one side of the heat sink 37 and an electrode plate 311, and a plurality of ventilation holes 361 are also defined between the other side of the heat sink 37 and another electrode plate 311. The ventilation holes 361 on both sides of the heat sink 37 are staggered in the third direction. The ventilation area 36 includes the ventilation holes 361.

[0079] In this embodiment of the invention, the ventilation area 36 is formed in a simple way. Multiple ventilation holes 361 can be defined by heat dissipation strip 37 and two electrode plates 311, which is convenient for manufacturing and reduces the cost of heating component 3.

[0080] In some embodiments, there are multiple PTC heating elements 31, and in the second direction, each PTC heating element 31 has at least one heat dissipation strip 37 on both sides.

[0081] By setting multiple PTC heating elements 31, the heating efficiency of the heating assembly 3 is effectively improved, enhancing the heating effect of the heater 100 in warm air mode. Furthermore, in the second direction, each PTC heating element 31 has at least one heat dissipation strip 37 on both sides, effectively improving the heat dissipation efficiency of each PTC heating element 31.

[0082] Reference Figure 4 In some embodiments, the heating assembly 3 further includes a first side plate 38 and a second side plate 39. In the third direction, each heat sink 37 has a first side plate 38 and a second side plate 39 on both sides. The first side plate 38 and the second side plate 39 are respectively connected to at least one electrode sheet 311.

[0083] In this embodiment of the present invention, the first side plate 38, the second side plate 39 and the two electrode plates 311 are formed into a cylindrical structure with open ends, which protects the heat sink 37 inside the cylindrical structure, reduces the risk of the heat sink 37 colliding with other structures, reduces the risk of deformation of the heat sink 37, and improves the reliability of the heating component 3.

[0084] In this embodiment, the total projected area A1 of the ventilation area 36 includes the area of ​​each ventilation hole 361. The total projected area A2 of the heating assembly 3 includes the total projected area A1 of the ventilation area 36, ​​the projected area of ​​each PTC heating element 31, the projected area of ​​each heat sink 37, the projected area of ​​each electrode sheet 311, the projected area of ​​each first side plate 38, and the projected area of ​​each second side plate 39.

[0085] In some specific embodiments, the first side plate 38 and the second side plate 39 are integrally connected to one electrode sheet 311 and welded to another electrode sheet 311; in other embodiments, the first side plate 38 and the second side plate 39 may also be bonded, snapped, or connected to the electrode sheet 311 in other ways, and the present invention does not limit this.

[0086] In some embodiments, the heat dissipation strip 37 is a triangular corrugated strip, and the ventilation hole 361 defined between the heat dissipation strip 37 and the electrode plate 311 is triangular. In other embodiments, the heat dissipation strip 37 may also be a rectangular corrugated strip, a trapezoidal corrugated strip, or a corrugated strip of other shapes, and the present invention is not limited thereto.

[0087] Reference Figure 5 In some embodiments, the thickness of the heat dissipation strip 37 is H, where 0.2mm ≤ H ≤ 0.5mm.

[0088] If the thickness H of the heat sink 37 is less than 0.2mm, the heat sink 37 is prone to deformation. When the heating component 3 is press-fitted, the heat sink 37 needs to withstand the pressure in the second direction. If the thickness of the heat sink 37 is too small, it is easy for the heat sink 37 to deform and be damaged. If the thickness H of the heat sink 37 is greater than 0.5mm, it will not only increase the cost and weight of the heating component 3, but also reduce A1 / A2 and increase the wind resistance of the heating component 3.

[0089] In this embodiment of the utility model, 0.2mm≤H≤0.5mm not only reduces the risk of deformation of the heat sink 37, but also reduces the cost of the heating component 3, which is beneficial to reduce the wind resistance of the heating component 3.

[0090] In some further embodiments, the thickness of the heat dissipation strip 37 is H, where 0.25mm ≤ H ≤ 0.28mm.

[0091] The above technical solution further reduces the risk of deformation of the heat sink 37, further reduces the cost of the heating component 3, and helps to reduce the wind resistance of the heating component 3.

[0092] In some specific embodiments, the thickness H of the heat dissipation strip 37 can be any one of 0.25mm, 0.26mm, 0.27mm, and 0.28mm, or a range between any two.

[0093] In some embodiments, in the second direction, the height of the heat sink 37 is C, where 5mm ≤ C ≤ 20mm.

[0094] If the height C of the heat sink 37 is less than 5mm, the area of ​​each ventilation hole 361 will be too small, which will easily lead to a reduction in A1 / A2 and increase the wind resistance of the heating component 3; if the height C of the heat sink 37 is greater than 20mm, the heat sink 35 will occupy a lot of space and affect the heat generation of the PTC heating element 31.

[0095] In this embodiment of the utility model, 5mm≤C≤20mm not only helps to increase the area of ​​each ventilation hole 361 and reduce the wind resistance of the heating component 3, but also avoids the heat dissipation component 35 occupying a lot of space, thus ensuring the reliability of the heating component 3 in terms of heat generation and heat dissipation.

[0096] In some further embodiments, in the second direction, the height of the heat sink 37 is C, where 8mm ≤ C ≤ 10mm.

[0097] By employing the above technical solutions, the area of ​​each ventilation hole 361 is further increased, the value of A1 / A2 is increased, the wind resistance of the heating component 3 is reduced, and the space occupied by the heat dissipation component 35 is further reduced, thus ensuring the reliability of the heating component 3 in terms of heat generation and heat dissipation.

[0098] In some specific embodiments, the height C of the heat sink 37 can be any one of 8mm, 8.5mm, 9mm, 9.5mm, 10mm or any range between two.

[0099] In some embodiments, the heat dissipation strip 37 is a triangular heat dissipation strip 37, and the peak spacing of the triangular heat dissipation strip 37 is B, where 3mm≤B≤8mm.

[0100] If the peak spacing B of the triangular heat sink 37 is less than 3mm, the area of ​​each ventilation hole 361 will be too small, which will easily lead to a reduction in A1 / A2 and increase the wind resistance of the heating component 3. If the peak spacing B of the triangular heat sink 37 is greater than 8mm, the angle between the hypotenuses in the triangular heat sink 37 will be too large, resulting in poor pressure resistance of the heat sink 37. During the pressing process of the heating component 3, the heat sink 37 is prone to deformation.

[0101] In this embodiment of the utility model, 3mm≤B≤8mm not only helps to increase the area of ​​each ventilation hole 361, increase the value of A1 / A2, and reduce the wind resistance of the heating component 3, but also ensures the pressure-bearing capacity of the heat dissipation strip 37 and the structural strength of the heating component 3.

[0102] In some further embodiments, the crest spacing of the triangular heat sink 37 is B, where 6mm < B ≤ 8mm.

[0103] By using the above technical solutions, the area of ​​each ventilation hole 361 is further increased, the value of A1 / A2 is increased, the wind resistance of the heating component 3 is reduced, the pressure-bearing capacity of the triangular heat sink 37 is further improved, and the structural strength of the heating component 3 is improved.

[0104] In some specific embodiments, the peak spacing B of the triangular heat sink 37 can be any one of 6.1mm, 6.5mm, 7mm, 7.8mm, and 8mm, or a range between any two.

[0105] In some further embodiments, C ≥ B.

[0106] The above technical solution makes the angle between two adjacent inclined sides of the heat sink 37 acute, which effectively improves the pressure bearing effect of the heat sink 37 in the second direction and reduces the risk of deformation of the heat sink component 35.

[0107] Reference Figure 6 , Figure 6 The heating components in the related technologies and the heating components in the three embodiments of this application have the same total heat exchange area. Figure 6It can be seen that, with the corrugated layer height C remaining constant, increasing the corrugation spacing B can increase the permeability of the heating component 3. When the permeability A1 / A2 ≥ 70%, the heater 100 has a higher cold air velocity in cold air mode and a higher temperature rise at 0.5 meters in warm air mode, indicating better performance of the heater 100. It should be noted that the temperature rise at 0.5 meters refers to the temperature rise effect of the air 0.5 meters away from the center of the air outlet 112.

[0108] Figure 6 In the three embodiments of this application, the width of the heating component in the second direction is greater than that of the related technology, which increases the volume of the heating component. That is, while increasing the through-hole ratio, the volume of the heating component is also increased, so that the total heat exchange area of ​​the heating component is the same as that of the related technology.

[0109] In some specific embodiments, the rotational speed of the impeller assembly is 500 r / min to 700 r / min in the warm air mode.

[0110] Reference Figure 6 It is known that when the speed of the warm air discharged from the air outlet is the same, the rotational speed of the impeller assembly in this embodiment is lower than that in the related technology. Because in this embodiment, the through-hole ratio A1 / A2 of the heating component is ≥70%, the wind resistance of the heating component is reduced. While meeting the requirement of the warm air output speed of the heater, the rotational speed of the impeller assembly can be reduced, thereby reducing the noise and energy consumption of the heater.

[0111] In some specific embodiments, in the heating mode, the rotational speed of the impeller assembly is any one of 500 r / min, 560 r / min, 600 r / min, or 700 r / min, or a range between any two. It should be understood that the heater can also be configured such that the rotational speed of the impeller assembly is adjustable, and in the heating mode, the rotational speed of the impeller assembly can be adjusted between 500 r / min and 700 r / min.

[0112] In some specific embodiments, the rotational speed of the wind turbine assembly is 1300 r / min to 1500 r / min in cold air mode.

[0113] If the speed of the wind turbine assembly is less than 1300 r / min, it will affect the cooling effect in cold air mode. If the speed of the wind turbine assembly is greater than 1500 r / min, it will increase the noise in cold air mode.

[0114] In this embodiment, the rotational speed of the fan assembly is 1300r / min to 1500r / min, which enables the heater to have a cooling effect in cold air mode while reducing the noise of the heater.

[0115] In some specific embodiments, in the cold air mode, the rotational speed of the impeller assembly is any one of 1300 r / min, 1350 r / min, 1400 r / min, or 1500 r / min, or a range between any two. It should be understood that the heater can also be configured such that the rotational speed of the impeller assembly is adjustable, and in the cold air mode, the rotational speed of the impeller assembly can be adjusted between 1300 r / min and 1500 r / min.

[0116] Reference Figure 3 and Figure 7 In some embodiments, the area of ​​the air duct space 11 used to accommodate the heating component 3 is a accommodating area 113. The accommodating area 113 is provided with a guide portion 114 on the side facing the wind turbine component 2. In a first direction, the cross-sectional area of ​​the end of the guide portion 114 connected to the accommodating area 113 is larger than the cross-sectional area of ​​the rest.

[0117] By employing the above technical solution, the volume of the heating component 3 can be increased. With A1 / A2 remaining constant, increasing the volume of the heating component 3 further increases the total area of ​​the ventilation zone 36, further reducing the wind resistance of the heating component 3 and effectively improving the airflow of the heater 100 in cold air mode, thus enhancing the cooling effect. Furthermore, increasing the volume of the heating component 3 also increases its heat dissipation area, improving its heating effect and ensuring the heating performance of the heater 100 in warm air mode.

[0118] In some embodiments, in a first direction, a portion of the heating assembly 3 is positioned directly opposite the air guide portion 114.

[0119] The above technical solution allows air to be directly blown onto the heating element 3 after being discharged from the air guide 114, which helps to further reduce wind resistance and improve the air output effect of the heater 100.

[0120] In some embodiments, the cross-sectional area of ​​the air guide 114 gradually increases in the direction toward the receiving area 113.

[0121] The above technical solution enables the inner wall of the air guide section 114 to be used for air guiding, reducing airflow turbulence and improving the air output effect of the heater 100.

[0122] Reference Figure 7 and Figure 9 In some specific embodiments, in the second direction, the inner wall of one side of the air guide 114 extends obliquely, so that the cross-sectional area of ​​the air guide 114 gradually increases in the direction toward the receiving area 113. (Refer to...) Figure 8 and Figure 10In other embodiments, in the second direction, the inner walls of opposite sides of the air guide 114 extend obliquely, so that the cross-sectional area of ​​the air guide 114 gradually increases in the direction toward the receiving area 113. In other embodiments, the inner walls of the air guide 114 may also extend obliquely on one or both sides in the third direction, so that the cross-sectional area of ​​the air guide 114 gradually increases in the direction toward the receiving area 113; this invention does not limit this to such embodiments.

[0123] In some embodiments, the maximum cross-sectional area of ​​the air guide 114 is A3, the minimum cross-sectional area of ​​the air guide 114 is A4, and 1 < A3 / A4 ≤ 1.5.

[0124] If A3 / A4 is greater than 1.5, the cross-sectional area of ​​the end of the air guide 114 connected to the housing area 113 will be too large, occupying too much space, which is not conducive to the miniaturization of the heater 100 as a whole.

[0125] In some specific embodiments, A3 / A4 can be any one of the point values ​​of 1.1, 1.2, 1.3, 1.4, and 1.5, or a range of values ​​between any two.

[0126] Reference Figure 7 and Figure 8 In some embodiments, in the first direction, the cross-sectional area of ​​the portion of the air duct space 11 located on the side of the heating assembly 3 facing the air outlet 112 remains unchanged.

[0127] The above technical solution ensures that there are no additional structures obstructing airflow in the area of ​​the air duct space 11 near the air outlet 112, resulting in low local resistance in the air duct and low load on the impeller assembly 2. This helps to reduce the energy consumption of the heater 100 and simplifies the structure of the air duct space 11, thereby reducing the cost of the heater 100.

[0128] Reference Figure 9 , Figure 10 and Figure 14 In some embodiments, in the first direction, the cross-sectional area of ​​the portion of the air duct space 11 located on the side of the heating assembly 3 facing the air outlet 112 gradually decreases.

[0129] The above technical solution can increase the air velocity at the air outlet 112, which is beneficial to further improve the cooling effect of the heater 100 in cold air mode.

[0130] Reference Figure 9 In some specific implementations, in the second direction, a portion of the inner wall of one side of the air duct space 11 extends obliquely, such that the cross-sectional area of ​​the portion of the air duct space 11 located on the side of the heating assembly 3 facing the air outlet 112 gradually decreases. (Refer to...) Figure 11In other embodiments, in the second direction, the inner walls of the opposite sides of the duct space 11 extend obliquely, so that the cross-sectional area of ​​the portion of the duct space 11 located on the side of the heating assembly 3 facing the air outlet 112 gradually decreases. (Refer to...) Figure 14 In other embodiments, the inner wall of the air duct space 11 may extend obliquely on one or both sides in the third direction, so that the cross-sectional area of ​​the portion of the air duct space 11 located on the side of the heating component 3 facing the air outlet 112 gradually decreases. This invention does not limit this.

[0131] Reference Figure 9 and Figure 10 In some embodiments, the opening area of ​​the accommodating area 113 facing the air outlet 112 is A5, and the opening area of ​​the air outlet 112 is A6, where 1 < A5 / A6 ≤ 1.5.

[0132] If A5 / A6 is greater than 1.5, the opening area of ​​the air outlet 112 will be too small, which will increase the wind resistance and the load on the fan assembly 2, which will be detrimental to the energy consumption of the heater 100.

[0133] In some specific embodiments, A5 / A6 can be any one of the point values ​​of 1.1, 1.2, 1.3, 1.4, and 1.5, or a range of values ​​between any two.

[0134] Reference Figure 7 In some embodiments, the maximum distance between the heating component 3 and the inner wall of the receiving area 113 is D, where D≤2mm.

[0135] If the maximum distance between the heating element 3 and the inner wall of the receiving area 113 is greater than 2mm, the heating element 3 will have difficulty heating the air close to the inner wall of the receiving area 113, which will easily lead to uneven heating of the air discharged from the air outlet 112 and affect the heating effect of the heater 100.

[0136] In some further embodiments, 1mm ≤ D ≤ 2mm.

[0137] If the maximum distance between the heating element 3 and the inner wall of the receiving area 113 is less than 1mm, the wind resistance will increase, which will be detrimental to the cooling effect of the heater 100 in the cold air mode.

[0138] In some specific embodiments, D can be any one of 1mm, 1.2mm, 1.5mm, 1.7mm, 2mm or a range of any two.

[0139] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, the wind turbine assembly 2 is a single unit.

[0140] For example, the impeller assembly 2 is a cross-flow impeller that extends along a third direction, that is, the length direction of the impeller assembly 2 is parallel to the length direction of the PTC heating element 31.

[0141] Through the above technical solution, the air delivery range of the fan assembly 2 can better cover the PTC heating element 31, so that the contact area between the air and the PTC heating element 31 is maximized when the air flows through the PTC heating element 31, thereby improving the heating effect of the heater 100.

[0142] Reference Figure 3 In some specific embodiments, the impeller assembly 2 is a cross-flow impeller that extends along a third direction. The diameter of the cross-flow impeller is d1, and the width of the end of the air guide 114 away from the heating assembly 3 in the second direction is W1, where W1≤d1.

[0143] The above technical solution further improves the airflow velocity within the air guide section 114, which is beneficial to improving the air output effect of the heater 100.

[0144] Reference Figures 7-10 In some further embodiments, the width of the end of the air guide 114 near the heating component 3 in the second direction is W2, 1 < W2 / W1 ≤ 1.5, thereby achieving: the maximum cross-sectional area of ​​the air guide 114 is A3, the minimum cross-sectional area of ​​the air guide 114 is A4, 1 < A3 / A4 ≤ 1.5.

[0145] In this embodiment of the invention, by controlling the width of the air guide 114 in the second direction, the cross-sectional area of ​​the air guide 114 at different positions is controlled, which simplifies the structure of the air guide 114 and reduces the cost of the heater 100.

[0146] In some further embodiments, the cross-sectional area of ​​the receiving region 113 remains unchanged in the first direction, and the width of the receiving region 113 in the second direction is equal to W2. The width of the air outlet 112 in the second direction is W3, 1 < W2 / W3 ≤ 1.5, thereby achieving: the opening area of ​​the end of the receiving region 113 facing the air outlet 112 is A5, and the opening area of ​​the air outlet 112 is A6, 1 < A5 / A6 ≤ 1.5.

[0147] In this embodiment of the invention, the cross-sectional area of ​​the accommodating region 113 remains unchanged in the first direction, and the width of the accommodating region 113 in the second direction is equal to W2. This not only simplifies the shape of the air duct space 11, reduces the difficulty of mold making, and lowers the cost, but also facilitates the installation of the heating component 3, and makes A3 = A5. Furthermore, by controlling the width of the air duct space 11 in the second direction, the cross-sectional area of ​​the air duct space 11 at different positions can be controlled, simplifying the structure of the air duct space 11 and reducing the cost of the heater 100.

[0148] Reference Figure 3 , Figure 9 and Figure 10 In some embodiments, a portion of the inner wall of the air duct space 11 is recessed to form a groove 17, the groove 17 extending at least along a second direction, and at least a portion of the heating assembly 3 is located within the groove 17.

[0149] For example, refer to Figure 9 The inner wall of the air duct space 11 is provided with a groove 17, and one end of the heating component 3 in the second direction is located in the groove 17.

[0150] For example, refer to Figure 10 The air duct space 11 has grooves 17 on its inner walls facing each other in the second direction, and the heating components 3 are located in the two grooves 17 at both ends in the second direction.

[0151] In this embodiment, the through-hole ratio A1 / A2 of the heating component is ≥70%, which increases the through-hole ratio compared to related technologies and reduces the air resistance of the heating component. Furthermore, the inner wall of the air duct space is provided with a groove 17, and at least a portion of the heating component is located within the groove 17. This makes the heating component in this embodiment larger in volume and increases the heat dissipation area of ​​the heating component. As a result, the heating component has sufficient heating effect while reducing the air resistance of the heating component and improving the air output effect of the heater.

[0152] In some specific embodiments, in the direction facing the air outlet, the groove 17 includes a first inner wall 171, a second inner wall 172 and a third inner wall 173 connected in sequence. The first inner wall 171 is inclined to help define the air guide portion 114, the second inner wall 172 helps define the receiving area 113 for accommodating the heating component 3, and the third inner wall 173 is inclined to make the cross-sectional area of ​​the portion of the air duct space 11 located on the side of the heating component 3 facing the air outlet 112 gradually decrease.

[0153] In this embodiment, the structure within the air duct space is simple, easy to manufacture, and reduces the cost of the heater.

[0154] Reference Figure 11 , Figure 12 and Figure 13 In other embodiments, there are multiple wind turbine components 2 and multiple air guides 114, with each air guide 114 and multiple wind turbine components 2 arranged in a one-to-one correspondence.

[0155] For example, the wind turbine assembly 2 is an axial flow wind turbine, and multiple axial flow wind turbines are arranged at intervals along a third direction.

[0156] Through the above technical solution, multiple axial flow fans are arranged at intervals along a third direction, so that the airflow can cover the PTC heating element 31, increasing the contact area between the air and the PTC heating element 31 and improving the heating effect of the heater 100.

[0157] In some specific embodiments, there are multiple impeller assemblies 2 and multiple air guide sections 114, with each air guide section 114 and each impeller assembly 2 corresponding to the others. The impeller assemblies 2 are axial flow impellers, and the multiple axial flow impellers are arranged at intervals along a third direction. The outer diameter of the axial flow impeller is d2, and the outer diameter of the end of the air guide section 114 furthest from the heating component 3 is W4, where 1.05 ≤ W4 / d2 ≤ 1.2.

[0158] The above technical solution increases the airflow velocity within the air guide section 114, further improving the air output effect of the heater 100.

[0159] In some specific embodiments, W4 / d2 can be any one of the point values ​​of 1.05, 1.08, 1.13, 1.15, and 1.2, or a range of values ​​between any two.

[0160] In some further embodiments, the outer diameter of the end of the air guide 114 near the heating component 3 is W5, where 1 < W5 / W4 ≤ 1.5.

[0161] If W5 / W4 is greater than 1.5, the cross-sectional area of ​​the end of the air guide 114 connected to the receiving area 113 will be too large, occupying too much space, which is not conducive to the miniaturization of the heater 100 as a whole.

[0162] In some specific embodiments, W5 / W4 can be any one of the point values ​​of 1.1, 1.2, 1.3, 1.4, and 1.5, or a range of values ​​between any two.

[0163] Other components of the heater according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0164] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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.

[0165] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A heater, characterized in that, include: The housing has an air duct space and an air inlet and an air outlet communicating with the air duct space. A wind turbine assembly, wherein the wind turbine assembly is disposed within the air duct space; A heating assembly is disposed within the air duct space and located between the impeller assembly and the air outlet. The heating assembly includes at least one PTC heating element, each PTC heating element including a PTC element and an electrode plate clamping the PTC element in a second direction. The heating assembly has a ventilated area that exchanges heat with the electrode plate. In a first direction, at least a portion of the ventilated area is directly opposite the air outlet. The first direction intersects the second direction. On the projection plane perpendicular to the first direction, the total area of ​​the orthographic projection of the ventilation area is A1, and the total area of ​​the orthographic projection of the heating component is A2, where A1 / A2≥70%.

2. The heater according to claim 1, characterized in that, The heating assembly also includes a heat sink connected to the electrode sheet, the heat sink having or participating in defining the ventilation area.

3. The heater according to claim 2, characterized in that, The heating assembly includes a plurality of electrode plates spaced apart along a second direction, wherein at least two electrode plates are provided with external connectors for connection to an external power source; The heat sink includes at least one heat sink strip, each of which extends in a zigzag pattern along a third direction to form a corrugated structure, each of which is sandwiched between adjacent electrode plates, and each of the heat sink strips and the adjacent electrode plates defines at least a portion of the ventilation area.

4. The heater according to claim 3, characterized in that, There are multiple PTC heating elements, and in the second direction, each PTC heating element has at least one heat dissipation strip on both sides.

5. The heater according to claim 3, characterized in that, The heating assembly further includes a first side plate and a second side plate. In the third direction, each heat sink is provided with a first side plate and a second side plate on both sides. The first side plate and the second side plate are respectively connected to at least one of the electrode plates.

6. The heater according to claim 3, characterized in that, The thickness of the corrugated strip is H, where 0.2mm ≤ H ≤ 0.5mm; And / or, the crest spacing of the corrugated strip is B, 3mm≤B≤8mm; And / or, in the second direction, the height of the corrugated strip is C, 5mm≤C≤20mm.

7. The heater according to claim 3, characterized in that, The thickness of the corrugated strip is H, where 0.25mm ≤ H ≤ 0.28mm; And / or, the crest spacing of the corrugated strip is B, 6mm < B ≤ 8mm; And / or, in the second direction, the height of the corrugated strip is C, 8mm≤C≤10mm.

8. The heater according to any one of claims 1-7, characterized in that, The area in the air duct space used to accommodate the heating component is called the accommodating area. The accommodating area has an air guide on the side facing the wind turbine component. In the first direction, the cross-sectional area of ​​the end of the air guide connected to the accommodating area is larger than the cross-sectional area of ​​the rest.

9. The heater according to claim 8, characterized in that, In the first direction, a portion of the heating component is positioned directly opposite the air guide portion.

10. The heater according to claim 8, characterized in that, The cross-sectional area of ​​the air guide gradually increases in the direction toward the receiving area.

11. The heater according to claim 10, characterized in that, The maximum cross-sectional area of ​​the air guide is A3, the minimum cross-sectional area of ​​the air guide is A4, and 1 < A3 / A4 ≤ 1.

5.

12. The heater according to claim 8, characterized in that, In the first direction, the cross-sectional area of ​​the portion of the duct space located on the side of the heating assembly facing the air outlet remains unchanged.

13. The heater according to claim 8, characterized in that, In the first direction, The cross-sectional area of ​​the portion of the air duct space located on the side of the heating assembly facing the air outlet gradually decreases.

14. The heater according to claim 13, characterized in that, The opening area of ​​the accommodating area facing the air outlet is A5, and the opening area of ​​the air outlet is A6, where 1 < A5 / A6 ≤ 1.

5.

15. The heater according to claim 8, characterized in that, The maximum distance between the heating component and the inner wall of the accommodating area is D, where D ≤ 2 mm.

16. The heater according to claim 8, characterized in that, There are multiple wind turbine assemblies and multiple air guides, with each air guide and wind turbine assembly corresponding to the other.

17. The heater according to claim 1, characterized in that, A portion of the inner wall of the air duct space is recessed to form a groove, the groove extending at least along the second direction, and at least a portion of the heating assembly is located within the groove.

18. The heater according to claim 17, characterized in that, The groove in the direction toward the air outlet includes a first inner wall, a second inner wall and a third inner wall connected in sequence. The first inner wall is inclined to help define the air guide portion, the second inner wall helps to define the receiving area for accommodating the heating component, and the third inner wall is inclined to make the cross-sectional area of ​​the portion of the air duct space located on the side of the heating component facing the air outlet gradually decrease.

19. The heater according to claim 1, characterized in that, The heater is configured to have a warm air mode and a cold air mode. In the warm air mode, both the impeller assembly and the heating assembly are working. In the cold air mode, the heating assembly is not working, but the impeller assembly is working.

20. The heater according to claim 19, characterized in that, In the warm air condition, the rotational speed of the wind turbine assembly is 500 r / min to 700 r / min; And / or, in the cold air condition, the rotational speed of the wind turbine assembly is 1300 r / min to 1500 r / min.

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