warm air blower and its safety control method

Abstract

This application relates to a heater and its safety control method. A first fan and a second fan are arranged vertically between the heating element and the air inlet. These fans blow the heat generated by the heating element out of the air inlet, achieving high-volume and high-power heating. Since the heater is equipped with a protector and a switching component, both of which detect the ambient temperature around the first fan, when the ambient temperature exceeds a second threshold, the switching component stops the first fan. This prevents the heat generated by the heating element at the first fan from being effectively expelled, further increasing the ambient temperature above the first threshold, thus causing the protector to stop the heating element, achieving effective safety protection. Furthermore, using a single protector to address different accidents helps maintain the heater's compact structure.

Description

Technical Field

[0001] This application relates to the field of heating technology, and in particular to heating fans and their safety control methods. Background Technology

[0002] To increase airflow and power, space heaters are typically equipped with two fans to expel the heat generated by the heating elements. However, with increased power, if the air outlet is blocked or a fan malfunctions, the space heater is prone to structural melting or fire hazards. Furthermore, the traditional dual-fan driven space heater design limits its ability to effectively balance compactness and safety.

[0003] The statements herein are provided only as background information in connection with this application and do not necessarily constitute prior art. Summary of the Invention

[0004] Therefore, it is necessary to provide a space heater and its safety control method to improve the safety performance of the space heater while ensuring a compact structure.

[0005] A space heater includes: a body with an air inlet and an air outlet spaced apart thereon, and an air supply channel connecting the air inlet and the air outlet inside the body; a heating element disposed in the air supply channel; a first fan and a second fan, both located between the heating element and the air inlet, wherein the first fan is higher than the second fan in the height direction of the body; a protector for controlling the heating element to stop working when the ambient temperature where the first fan is located exceeds a first threshold; and an on / off component disposed on the first fan for controlling the first fan to stop working when the ambient temperature where the first fan is located exceeds a second threshold, wherein the first threshold is greater than the second threshold.

[0006] The aforementioned fan heater has a first fan and a second fan arranged vertically between the heating element and the air inlet. These fans blow the heat generated by the heating element out of the air outlet, achieving high airflow and power heating. Because the fan heater is equipped with a protector and a switching mechanism, both of which detect the ambient temperature around the first fan, if the first fan malfunctions or its corresponding air outlet is blocked, the heat generated by the heating element at the first fan cannot be directly expelled from the heater. This backflow and accumulation of heat can easily cause the ambient temperature around the first fan to exceed a first threshold. In this case, the protector will control the heating element to stop working. Similarly, if the second fan malfunctions or its corresponding air outlet is blocked, the heat generated by the heating element at the second fan cannot be directly expelled from the heater and will instead accumulate around the first fan, causing the ambient temperature around the first fan to exceed a second threshold. At this point, the on / off component controls the first fan to stop working, preventing the heat generated by the heating element at the first fan from being effectively dissipated from the heater. This exacerbates the rise in ambient temperature around the first fan, exceeding the first threshold, thus causing the protector to stop the heating element. With this design, the heater can effectively and promptly control the heating element to stop working under any of the above-mentioned accident conditions, achieving effective safety protection. Furthermore, this application uses only one protector to effectively protect against different accidents, reducing the number of protectors required in the heater. Moreover, since the on / off component is located in the first fan, no additional installation space or internal wiring is needed, which helps ensure the compact structure of the heater.

[0007] In some embodiments, the heating component and the air inlet define a first region and a second region located in the air supply channel, the first region being higher than the second region, the first fan being located in the first region, the second fan being located in the second region, the protector controlling the heating component to stop working when it detects that the temperature in the first region exceeds the first threshold, and the on / off component controlling the first fan to stop working when it detects that the temperature in the first region exceeds the second threshold.

[0008] In some embodiments, the protector is at least partially located within the first region for detecting the temperature within the first region, and the protector can control the circuitry of the heating component to disconnect when it detects that the temperature within the first region exceeds the first threshold.

[0009] In some embodiments, the protector is located between the heating assembly and the first fan.

[0010] In some embodiments, at least a portion of the switching component is located within the first region for detecting the temperature within the first region, and the switching component can control the circuit of the first fan to disconnect when it detects that the temperature within the first region exceeds a second threshold.

[0011] In some embodiments, the on / off component is located on one side of the first fan facing the heating component and is electrically connected to the first fan.

[0012] In some embodiments, the switching assembly includes a housing, an elastic member, a first connector, a second connector, a pusher, and a deformable member covering one end of the housing. The housing is embedded in one side of the first fan facing the heating assembly. The first connector and the second connector are spaced apart within the housing, with one end of each extending outside the housing. The portions of the first connector and the second connector outside the housing are electrically connected to the first fan. The elastic member is disposed within the housing and electrically abuts against the first connector and the second connector. The pusher is located within the housing and abuts between the elastic member and the deformable member. The deformable member is configured to arch towards the housing when the temperature in the first region exceeds a second threshold, so that the pusher pushes the elastic member to elastically contract.

[0013] In some embodiments, the heating component is configured as a heater of a positive temperature coefficient thermistor.

[0014] In some embodiments, the body includes a housing and an air duct component disposed within the housing, the air inlet and the air outlet are spaced apart on the housing, and the air supply channel is disposed on the air duct component.

[0015] A safety control method for a space heater, using any one of the space heaters described above, the method comprising the following steps: in response to the ambient temperature of the first fan exceeding a second threshold, controlling the first fan to stop working; in response to the ambient temperature of the first fan exceeding a first threshold, controlling the heating component to stop working.

[0016] The aforementioned safety control method for the warm air heater utilizes a warm air heater where, if the second fan malfunctions or its corresponding air outlet is blocked, the heat generated by the heating element at the second fan cannot be directly expelled from the heater and will instead concentrate at the first fan, causing the ambient temperature around the first fan to exceed a second threshold. At this point, the on / off component controls the first fan to stop working, preventing the heat generated by the heating element at the first fan from being effectively expelled, further increasing the ambient temperature around the first fan to exceed the first threshold, thus causing the protector to stop the heating element. This design ensures that the warm air heater can effectively and promptly control the heating element to stop working under any of these accident conditions, achieving effective safety protection. Furthermore, this application uses only one protector to effectively protect against different accidents, reducing the number of protectors required within the warm air heater. Since the on / off component is located at the first fan, no additional installation space or internal wiring is needed, contributing to the compact structure of the warm air heater. Attached Figure Description

[0017] Figure 1 This is an exploded view of the structure of the heater described in some embodiments of this application.

[0018] Figure 2 A cross-sectional view of the structure of the heater described in some embodiments of this application. Figure 1 .

[0019] Figure 3 A cross-sectional view of the structure of the heater described in some embodiments of this application. Figure 2 .

[0020] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle circle.

[0021] Figure 5 A cross-sectional view of the structure of the heater described in some embodiments of this application. Figure 3 .

[0022] Figure 6 This is a schematic diagram of the structure of the first fan described in some embodiments of this application.

[0023] Figure 7 This is a structural cross-sectional view of the contact channel assembly described in some embodiments of this application.

[0024] Figure 8 This is a structural cross-sectional view of the channel assembly when disconnected, as described in some embodiments of this application.

[0025] Figure 9 This is a safety control flowchart of the heater described in some embodiments of this application.

[0026] 100. Warm air blower; 10. Body; 11. Housing; 111. Front housing; 112. Rear housing; 12. Air duct component; 13. Air inlet; 14. Air outlet; 15. Air supply channel; 151. First zone; 152. Second zone; 16. Mesh assembly; 20. First fan; 30. Second fan; 40. Heating assembly; 50. Protector; 60. On / off assembly; 61. Housing; 62. First connector; 621. Fixed connector plate; 63. Second connector; 64. Deformable component; 65. Pushing component; 66. Elastic component; 661. Elastic component; 662. Moving contact; 663. Moving connector plate; X, Height direction. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] In some embodiments, please refer to Figure 1 and Figure 2 This application provides a heater 100, which includes a body 10, a heating element 40, a protector 50, and an on / off component 60. The body 10 has an air inlet 13 and an air outlet 14 spaced apart, and an air supply channel 15 connecting the air inlet 13 and the air outlet 14 is provided inside the body. The heating element 40 is disposed in the air supply channel 15. A first fan 20 and a second fan 30 are both located between the heating element 40 and the air inlet 13, and the first fan 20 is higher than the second fan 30 in the height direction X of the body 10. The protector 50 is used to control the heating element 40 to stop working when the ambient temperature of the first fan 20 exceeds a first threshold. The on / off component 60, disposed on the first fan 20, is used to control the first fan 20 to stop working when the ambient temperature of the first fan 20 exceeds a second threshold, wherein the first threshold is greater than the second threshold.

[0034] The aforementioned heater 100 has a first fan 20 and a second fan 30 arranged vertically between the heating element 40 and the air inlet 13. The first fan 20 and the second fan 30 can blow the heat generated by the heating element 40 out of the air outlet 14, achieving high-volume and high-power heating. Since the heater 100 is equipped with a protector 50 and a switching component 60, both of which are used to detect the ambient temperature of the first fan 20, if the first fan 20 malfunctions or the air outlet 14 corresponding to the first fan 20 is partially blocked, the heat generated by the heating element 40 at the first fan 20 cannot be directly discharged from the heater 100. This backflow and accumulation of heat can easily cause the ambient temperature of the first fan 20 to exceed a first threshold. In this case, the protector 50 controls the heating element 40 to stop working. If the second fan 30 malfunctions or the air outlet 14 corresponding to the second fan 30 is blocked, the heat generated by the heating element 40 at the second fan 30 cannot be directly discharged from the heater 100. Instead, it will concentrate at the first fan 20, causing the ambient temperature around the first fan 20 to exceed the second threshold. At this time, the on / off component 60 controls the first fan 20 to stop working, preventing the heat generated by the heating element 40 at the first fan 20 from being effectively discharged from the heater 100. This further increases the ambient temperature around the first fan 20, causing it to rise above the first threshold, thus causing the protector 50 to control the heating element 40 to stop working. With this design, the heater 100 can effectively and promptly control the heating element 40 to stop working under any of the above-mentioned accident conditions, achieving effective safety protection. Meanwhile, this embodiment can achieve effective protection by using only one protector 50 to deal with different accidents, reducing the number of protectors 50 required in the heater 100. Furthermore, the on / off component 60 is located in the first fan 20, eliminating the need for additional installation space and internal wiring, which helps to ensure the compact structure of the heater 100.

[0035] It should be noted that, in the safety protection design, if the protector 50 is designed to detect the ambient temperature of the second fan 30, it can effectively protect against malfunctions of the second fan 30 or blockages in the air outlet 14 corresponding to the second fan 30. However, due to the lower density of hot air, when the first fan 20 malfunctions or the air outlet 14 corresponding to the first fan 20 is blocked, the protector 50 cannot detect in time that the ambient temperature exceeds the first threshold. This could lead to damage or fire to the heater 100 before the heating component 40 is interrupted, thus failing to provide effective safety protection.

[0036] If the protector 50 is designed to detect the ambient temperature of the first fan 20, it can effectively protect against malfunctions of the first fan 20 or blockages in the air outlet 14 corresponding to the first fan 20. However, if the second fan 30 malfunctions or its corresponding air outlet 14 is blocked, although the heat generated by the heating element 40 at the second fan 30 can be drawn towards the first fan 20 due to its lower density, the first fan 20, being in normal operation, can expel most of the heat from the air outlet 14. This prevents the temperature detected by the protector 50 from exceeding the first threshold in time, thus preventing the heating element 40 from stopping. In this case, although the hot air generated by the heating element 40 will diffuse towards the first fan 20, a significant portion of the heat will remain near the second fan 30, and the temperature will continue to rise. This could damage electrical components near the second fan 30 due to high temperatures, melt or destroy the injection-molded structural parts around the second fan 30, or even cause a fire. Therefore, this solution cannot provide effective safety protection.

[0037] Of course, if protectors 50 are installed at both the first fan 20 and the second fan 30, effective temperature monitoring and protection can be achieved at the first fan 20 and the second fan 30 respectively. However, the additional protector 50 not only increases the manufacturing cost, but also requires the reservation of installation space for the protector 50 and the space for wiring of the protector 50 within the heater 100, which seriously affects the compactness of the heater 100.

[0038] Therefore, in this embodiment, an on / off component 60 is provided on the first fan 20. This component 60 monitors the ambient temperature of the first fan 20. If the ambient temperature, although not exceeding a first threshold, exceeds a second threshold, the first fan 20 can be controlled to stop operating. The specific values ​​of the first and second thresholds can be determined based on the size and power of the heater 100. For example, the first threshold can be set to, but is not limited to, 150℃~200℃, and the second threshold can be set to, but is not limited to, 100℃~150℃.

[0039] It should also be noted that the protector 50 is designed to stop the heating element 40 from operating when the detected temperature exceeds a first threshold. For example, when the detected temperature exceeds the first threshold, the protector 50 disconnects, causing the circuit of the heating element 40 to break, thereby stopping the heating element 40 from operating. The protector 50 can be of various types, such as, but not limited to, a liquid expansion thermostat, a bimetallic thermostat, or a hydraulic thermostat.

[0040] Meanwhile, the on / off component 60 refers to the component that can control the first fan 20 to stop working when the detected temperature exceeds the second threshold. It can also be designed in various ways, such as, but not limited to, a thermal protection switch.

[0041] Further, please refer to Figures 2 to 4 A first region 151 and a second region 152, both located within the air supply channel 15, are defined between the heating component 40 and the air inlet 13. The first region 151 is higher than the second region 152. The first fan 20 is located in the first region 151, and the second fan 30 is located in the second region 152. When the protector 50 detects that the temperature in the first region 151 exceeds a first threshold, it controls the heating component 40 to stop working. When the on / off component 60 detects that the temperature in the first region 151 exceeds a second threshold, it controls the first fan 20 to stop working. Therefore, by defining the first region 151 and the second region 152 between the heating component 40 and the air outlet 14, and by placing the first fan 20 and the second fan 30 in the first region 151 and the second region 152 respectively, the protector 50 and the on / off component 60 can effectively obtain the ambient temperature of the first fan 20 by detecting the temperature in the first region 151, thus facilitating effective safety protection by the protector 50 and the on / off component 60.

[0042] It should be noted that when the second fan 30 malfunctions or the air outlet 14 corresponding to the second fan 30 is partially blocked, the heat generated by the heating component 40 in the second region 152 cannot be discharged, resulting in heat recirculation and causing the temperature of the second region 152 to rise. Because hot air is less dense, the hot air in the second region 152 will converge into the first region 151, causing the temperature in the first region 151 to rise. When the temperature in the first region 151 exceeds the second threshold, the on / off component 60 can control the first fan 20 to stop working, causing the hot air in the first region 151 to be unable to be discharged, further exacerbating the temperature rise in the first region 151, causing the temperature in the first region 151 to exceed the first threshold.

[0043] Furthermore, please refer to Figure 4 At least a portion of the protector 50 is located within the first region 151, and it is used to detect the temperature within the first region 151. When the protector 50 detects that the temperature within the first region 151 exceeds a first threshold, it can control the circuit of the heating component 40 to disconnect. Thus, by controlling the on / off state of the heating component 40's circuit, the operation of the heating component 40 can be effectively controlled. For example, when the temperature within the first region 151 exceeds the first threshold, the circuit of the heating component 40 is disconnected, causing the heating component 40 to lose power and cease heating. Simultaneously, by locating at least a portion of the protector 50 within the first region 151, the temperature detected by the protector 50 can more promptly and effectively reflect any accidents occurring at the second fan 30, improving the timeliness of safety protection.

[0044] It should be noted that the protector 50 is at least partially located in the first region 151, which may be located between the heating component 40 and the first fan 20; or it may be located on the side of the first fan 20 facing away from the heating component 40, etc. Meanwhile, the first region 151 is positioned higher than the second region 152 and communicates with the second region 152, thus allowing heat in the second region 152 to converge into the first region 151. Furthermore, both the first region 151 and the second region 152 can extend along the direction from the air inlet 13 to the air outlet 14.

[0045] In some embodiments, the protector 50 is connected in series with the heating component 40. This facilitates effective control of the circuitry of the heating component 40, achieving effective safety protection. It should be noted that the specific series circuit between the protector 50 and the heating component 40 can be determined according to the structural design of the protector 50 and the heating component 40, as long as they are connected in series.

[0046] In some embodiments, please refer to Figure 4 The protector 50 is located between the heating element 40 and the first fan 20. Therefore, placing the protector 50 between the heating element 40 and the first fan 20 allows the protector 50 to detect the temperature of the first region 151 located between the heating element 40 and the first fan 20, ensuring that the protector 50 can more accurately and effectively determine whether the heater 100 has malfunctioned, thus improving the accuracy of safety protection. At the same time, placing the protector 50 between the heating element 40 and the first fan 20 also facilitates wiring between the protector 50 and the heating element 40, which helps improve the assembly efficiency of the heater 100.

[0047] In some embodiments, please refer to Figure 2 At least a portion of the switching component 60 is located within the first region 151, and it is used to detect the temperature within the first region 151. When the temperature within the first region 151 exceeds a second threshold, the switching component 60 can control the circuit of the first fan 20 to disconnect. Thus, by controlling the circuit of the first fan 20, its operation can be effectively controlled. For example, when the temperature within the first region 151 exceeds the second threshold, the circuit of the first fan 20 is disconnected, causing the first fan 20 to lose power and cease heating. Simultaneously, by locating at least a portion of the switching component 60 within the first region 151, the temperature detected by the switching component 60 can more promptly and effectively reflect any accidents occurring at the second fan 30, improving the timeliness of safety protection.

[0048] It should be noted that the protector 50 is at least partially located in the first region 151, and it may be located between the heating component 40 and the first fan 20; or it may be located on the side of the first fan 20 facing away from the heating component 40, etc.

[0049] Further, please refer to Figure 5 and Figure 6 The on / off component 60 is located on the side of the first fan 20 facing the heating component 40 and is electrically connected to the first fan 20. This design, placing the on / off component 60 on the side of the first fan 20 facing the heating component 40, allows the on / off component 60 to detect the ambient temperature between the heating component 40 and the first fan 20, ensuring that the on / off component 60 can more accurately and effectively determine whether the heater 100 has malfunctioned, thus improving the accuracy of safety protection.

[0050] It should be noted that there are several ways to set the on / off component 60 on the first fan 20. For example, the on / off component 60 may be fixed to the surface of the first fan 20; or the on / off component 60 may be embedded in the first fan 20, but at least partially exposed on the surface of the first fan 20, in order to detect the ambient temperature of the first fan 20.

[0051] Further, please refer to Figure 7 and Figure 8 The switching assembly 60 includes a housing 61, an elastic member 66, a first connector 62, a second connector 63, a pusher 65, and a deformable member 64 covering one end of the housing 61. The housing 61 is embedded in the side of the first fan 20 facing the heating assembly 40. The first connector 62 and the second connector 63 are spaced apart inside the housing 61, and one end of each connector extends outside the housing 61. The portions of the first connector 62 and the second connector 63 outside the housing 61 are electrically connected to the first fan 20. The elastic member 66 is located inside the housing 61 and electrically abuts against the first connector 62 and the second connector 63. The pusher 65 is located inside the housing 61 and abuts between the elastic member 66 and the deformable member 64. The deformable member 64 is configured to arch towards the housing 61 when the temperature in the first region 151 exceeds a second threshold, so that the pusher 65 pushes the elastic member 66 to elastically contract.

[0052] Therefore, when the elastic component 66 abuts against the first connector 62 and the second connector 63 due to its own elasticity, the first connector 62 and the second connector 63 are connected through the elastic component 66, thus making the circuit of the first fan 20 conductive and ensuring the normal operation of the first fan 20. When the ambient temperature of the first fan 20 exceeds the second threshold, the deformation component 64 arches towards one side of the housing 61, driving the pusher 65 to push the elastic component 66 to elastically contract, causing the elastic component 66 to disengage from the first connector 62 and the second connector 63, disconnecting the connection between the first connector 62 and the second connector 63. At this time, the circuit of the first fan 20 is disconnected, and it is in a stopped working state. When the ambient temperature of the first fan 20 returns to normal, the deformation of the deformation component 64 decreases, and the elastic component 66 returns to its initial state due to its own elasticity and abuts against the first connector 62 and the second connector 63 again, thus closing the circuit of the first fan 20.

[0053] It should be noted that the deformable component 64 refers to a structure that deforms under the influence of temperature, and it can be, but is not limited to, an aluminum sheet cover. Since the pusher 65 pushes the elastic component 66 to contract under the arching of the deformable component 64, the pusher 65 can be selected as a structure with a certain strength; at the same time, to prevent the pusher 65 from becoming conductive, the pusher 65 can be designed as an insulating material, such as, but not limited to, plastics, ceramics, etc.

[0054] Meanwhile, when the deformable component 64 does not deform or recovers its deformation, the elastic component 66 can rely on its own elasticity to re-abut against the first connector 62 and the second connector 63. Its structural design can be varied, for example: please refer to... Figure 7 and Figure 8 The elastic component 66 may include an elastic element 661 and a movable contact 662 disposed on the elastic element 661, with the pushing member 65 abutting between the deforming member 64 and the elastic element 661. At this time, the movable contact 662, under the action of the elastic element 661, abuts against the first connector 62 and the second connector 63 to achieve conductivity between the first connector 62 and the second connector 63. The abutment of the movable contact 662 against the first connector 62 and the second connector 63 may be direct or indirect. For example, one end of the first connector 62 is connected to a fixed plate 621, and the movable contact 662 is provided with a movable plate 663. When the movable contact 662 is acted upon by the elastic element 661, the movable plate 663 abuts against the second connector 63 and the fixed plate 621 respectively. Furthermore, the elastic element 661 may have various structures, such as, but not limited to, a spring, a metal sheet, or elastic rubber.

[0055] In some specific embodiments, the elastic element 661 includes an elastic metal sheet that is bent to form two bent and connected folded edges. One folded edge abuts against the bottom of the housing 61, and the other folded edge abuts against the pusher 65, with the movable contact 662 disposed on the folded edge abutting against the pusher 65.

[0056] In some embodiments, the heating component 40 is configured as a heater with a positive temperature coefficient thermistor. The positive temperature coefficient thermistor is a PTC (Positive Temperature Coefficient) thermistor, a type of temperature-sensitive semiconductor resistor whose resistance increases abruptly with increasing temperature above a certain temperature (Curie temperature); and has low resistance below the Curie temperature.

[0057] When the heating element 40 is a positive temperature coefficient thermistor heater, the first fan 20 and the second fan 30 expel the heat generated by the heating element 40 from the heater 100, thus lowering the surface temperature of the heating element 40 to below the Curie temperature. At this time, the resistance of the heating element 40 remains very small, and the heating element 40 continues to heat. When the first fan 20 and / or the second fan 30 are blocked and cannot rotate, the heat generated by the heating element 40 cannot be expelled from the heater 100 in time, and the surface temperature of the heating element 40 quickly reaches the Curie temperature. After reaching the Curie temperature, the resistance of the PTC thermistor becomes very large, and the current through the PTC thermistor is very small, so the heating element 40 is almost in an off-state and does not heat up.

[0058] Therefore, designing the heating element 40 as a positive temperature coefficient thermistor heater allows for the protection of the heater 100 in the event of an accident, such as a malfunction of the second fan 30 or a blockage of the air outlet 14 corresponding to the second fan 30. In such cases, the heat generated by the heating element 40 at the second fan 30 cannot be discharged through the air outlet 14 and will instead flow back to the second fan 30. Due to the lower density of hot air, the generated heat will concentrate at the first fan 20, causing the ambient temperature at the first fan 20 to exceed the second threshold. This will cause the on / off component 60 to stop the first fan 20, further increasing the internal temperature of the heater 100 to above the Curie temperature. At this time, the resistance of the heating element 40 increases, reducing the current flowing through it, thus achieving self-protection. Simultaneously, when the temperature at the first fan 20 exceeds the first threshold, the protector 50 will also stop the heating element 40. This design provides dual safety protection for the heater 100.

[0059] In some embodiments, please refer to Figure 1 The body 10 includes a housing 11 and an air duct component 12 disposed within the housing 11. An air inlet 13 and an air outlet 14 are spaced apart on the housing 11, and an air supply channel 15 is disposed on the air duct component 12. Thus, the air duct component 12 is introduced to facilitate the discharge of heat generated by the heating element 40 to the air outlet 14.

[0060] It should be noted that there are various ways to install the air duct component 12 within the housing 11, such as, but not limited to, snap-fit, bolt connection, adhesive bonding, and pin connection. Furthermore, to facilitate the assembly of the air duct component 12 within the housing 11, the housing 11 may include a front housing 111 and a rear housing 112 that mates with the front housing 111. The air outlet 14 is located on the front housing 111, the air inlet 13 is located on the rear housing 112, and the air duct component 12 is mounted on both the front housing 111 and the rear housing 112. The connection between the front housing 111 and the rear housing 112 can be, but is not limited to, snap-fit, riveting, and bolt connection.

[0061] In addition, to prevent impurities from entering the heater 100 from the air outlet 14 and the air inlet 13, mesh cover assemblies 16 can be installed at the air outlet 14 and the air inlet 13 respectively.

[0062] In some embodiments, please refer to Figure 9 This application provides a safety control method for a space heater, using any of the above-mentioned space heaters 100, the method comprising the following steps:

[0063] S100: In response to the ambient temperature of the first fan 20 exceeding the second threshold, control the first fan 20 to stop working;

[0064] S200, in response to the ambient temperature of the first fan 20 exceeding the first threshold, controls the heating component 40 to stop working.

[0065] The safety control method for the aforementioned heater 100 utilizes the heater 100. When the second fan 30 malfunctions or the air outlet 14 corresponding to the second fan 30 is blocked, the heat generated by the heating element 40 at the second fan 30 cannot be directly discharged from the heater 100. Instead, it concentrates towards the first fan 20, causing the ambient temperature at the first fan 20 to exceed the second threshold. At this time, the on / off component 60 controls the first fan 20 to stop working, preventing the heat generated by the heating element 40 at the first fan 20 from being effectively discharged from the heater 100. This further increases the ambient temperature at the first fan 20, causing it to rise above the first threshold, thus causing the protector 50 to stop the heating element 40 from working. With this design, the heater 100 can effectively and promptly control the heating element 40 to stop working under any of the above-mentioned accident conditions, achieving effective safety protection. Meanwhile, this application can achieve effective protection by using a single protector 50 to deal with different accidents, reducing the number of protectors 50 required in the heater 100. Furthermore, the on / off component 60 is located in the first fan 20, eliminating the need for additional installation space and internal wiring, which helps to ensure the compact structure of the heater 100.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A space heater, characterized in that, The warm air heater includes: The body (10) has an air inlet (13) and an air outlet (14) spaced apart on it, and an air supply channel (15) is provided inside it connecting the air inlet (13) and the air outlet (14); A heating component (40) is disposed in the air supply channel (15). The heating component (40) and the air inlet (13) define a first region (151) and a second region (152) located in the air supply channel (15). The first region (151) is higher than the second region (152) and communicates with the second region (152). The first fan (20) and the second fan (30) are both located between the heating component (40) and the air inlet (13), and the first fan (20) is higher than the second fan (30) in the height direction (X) of the body (10). The first fan (20) is located in the first region (151), and the second fan (30) is located in the second region (152). The protector (50) is used to control the heating component (40) to stop working when the ambient temperature at which the first fan (20) is located exceeds a first threshold. An on / off component (60) is provided on the first fan (20) and is used to control the first fan (20) to stop working when the ambient temperature of the first fan (20) exceeds a second threshold, wherein the first threshold is greater than the second threshold.

2. The heater according to claim 1, characterized in that, The protector (50) controls the heating component (40) to stop working when it detects that the temperature in the first region (151) exceeds the first threshold, and the on / off component (60) controls the first fan (20) to stop working when it detects that the temperature in the first region (151) exceeds the second threshold.

3. The heater according to claim 2, characterized in that, At least a portion of the protector (50) is located within the first region (151) for detecting the temperature within the first region (151), and the protector (50) can control the circuit of the heating component (40) to disconnect when it detects that the temperature within the first region (151) exceeds the first threshold.

4. The heater according to claim 2, characterized in that, The protector (50) is located between the heating assembly (40) and the first fan (20).

5. The heater according to claim 2, characterized in that, At least a portion of the switching component (60) is located within the first region (151) for detecting the temperature within the first region (151), and the switching component (60) can control the circuit of the first fan (20) to disconnect when it detects that the temperature within the first region (151) exceeds the second threshold.

6. The warm air blower according to claim 5, characterized in that, The on / off component (60) is located on one side of the first fan (20) facing the heating component (40) and is electrically connected to the first fan (20).

7. The warm air blower according to claim 6, characterized in that, The switching component (60) includes a housing (61), an elastic member (66), a first connector (62), a second connector (63), a pusher (65), and a deformable member (64) covering one end of the housing (61). The housing (61) is embedded in one side of the first fan (20) facing the heating component (40). The first connector (62) and the second connector (63) are spaced apart inside the housing (61), and one end of both extends out of the housing (61). The portions of the first connector (62) and the second connector (63) outside the housing (61) are electrically connected to the first fan (20). The elastic member (66) is disposed within the housing (61) and electrically abuts against the first connector (62) and the second connector (63). The pusher (65) is located within the housing (61) and abuts between the elastic member (66) and the deformable member (64). The deformable member (64) is configured to arch toward the housing (61) when the temperature in the first region (151) exceeds the second threshold, so that the pusher (65) pushes the elastic member (66) to elastically contract.

8. The heater according to any one of claims 1-7, characterized in that, The heating component (40) is configured as a heater of a positive temperature coefficient thermistor.

9. The warm air blower according to any one of claims 1-7, characterized in that, The body (10) includes a housing (11) and an air duct component (12) disposed in the housing (11). The air inlet (13) and the air outlet (14) are spaced apart on the housing (11), and the air supply channel (15) is disposed on the air duct component (12).

10. A safety control method for a heater, using the heater described in any one of claims 1-9, characterized in that, The method includes the following steps: In response to the ambient temperature of the first fan (20) exceeding the second threshold, the first fan (20) is controlled to stop working; In response to the ambient temperature of the first fan (20) exceeding a first threshold, the heating component (40) is controlled to stop working.

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