Warm air blower and safety control method thereof

Abstract

According to the warm air blower and the safety control method thereof, the first draught fan and the second draught fan are arranged between the heating assembly and the air inlet up and down, so that heat generated by the heating assembly can be blown out of the air outlet through the first draught fan and the second draught fan, and the large-air-volume and power heating requirement is met. Due to the fact that the fan heater is provided with the protector and the on-off assembly, and the protector and the on-off assembly are both used for detecting the temperature of the environment where the first fan is located, when the temperature of the environment where the first fan is located exceeds the second threshold value, the on-off assembly controls the first fan to stop working; therefore, heat generated by the heating assembly at the first fan cannot be effectively discharged out of the fan heater, the temperature of the environment where the first fan is located is increased to exceed the first threshold value, the protector controls the heating assembly to stop working, and effective safety protection is achieved. And meanwhile, effective protection can be realized by adopting one protector under different accidents, and the compact structure of the warm air blower can be ensured.

Description

Technical Field

[0001] The present application relates to the technical field of heating air, and in particular to a heating air heater and a safety control method thereof. Background Art

[0002] In order to increase the air volume and power, the heater is generally equipped with two fans, which are used to discharge the heat generated by the heating component out of the heater. As the power of the heater increases, if the air outlet of the heater is blocked or the fan fails, the heater is prone to safety hazards such as structural melting or fire. However, due to the structural design of the traditional dual-fan driven heater, the heater cannot effectively take into account both compact structure and safety protection.

[0003] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0004] Based on this, it is necessary to provide a heater and a safety control method thereof, so as to improve the safety performance of the heater while ensuring a compact structure.

[0005] A heater, comprising: a body, on which an air inlet and an air outlet are provided at intervals, and an air supply channel connected between the air inlet and the air outlet is provided inside the body; a heating component, arranged in the air supply channel; a first fan and a second fan, both located between the heating component and the air inlet, and the first fan is higher than the second fan in the height direction of the body; a protector, used to control the heating component to stop working when it is detected that the ambient temperature of the first fan exceeds a first threshold value; an on-off component, arranged on the first fan, used to control the first fan to stop working when it is detected that the ambient temperature of the first fan exceeds a second threshold value, wherein the first threshold value is greater than the second threshold value.

[0006] In the above-mentioned heater, the first fan and the second fan are arranged up and down between the heating component and the air inlet, so that the heat generated by the heating component can be blown out of the air outlet through the first fan and the second fan, so as to meet the heating demand of large air volume and power. Since the heater is equipped with a protector and a switch component, and the protector and the switch component are used to detect the ambient temperature of the first fan, therefore, if the first fan fails or the air outlet corresponding to the first fan is partially blocked, the heat generated by the heating component at the first fan cannot be directly discharged out of the heater, and the heat formed by the reflux and gathering is easy to make the ambient temperature of the first fan exceed the first threshold value. At this time, the heating component is controlled to stop working by the protector. If the second fan fails or the air outlet corresponding to the second fan is partially blocked, the heat generated by the heating component at the second fan cannot be directly discharged out of the heater, and will gather to the first fan, so that the ambient temperature of the first fan can first exceed the second threshold value. At this time, the on-off component controls the first fan to stop working, so that the heat generated by the heating component at the first fan cannot be effectively discharged outside the heater, which aggravates the ambient temperature of the first fan to exceed the first threshold, so that the protector controls the heating component to stop working. With such a design, the heater can effectively and timely control the heating component to stop working regardless of any of the above accidents, thereby achieving effective safety protection. At the same time, the present application can achieve effective protection by using one protector to deal with different accidents, reducing the number of protectors in the heater, and the on-off component is arranged on the first fan, without the need to reserve additional installation space and wiring inside the machine, which is conducive to ensuring the compact structure of the heater.

[0007] In some embodiments, a first area and a second area are defined between the heating component and the air inlet, both of which are located in the air supply channel, the first area is higher than the second area, the first fan is arranged in the first area, and the second fan is arranged in the second area, and the protector controls the heating component to stop working when it detects that the temperature in the first area exceeds the first threshold value, and the on-off component controls the first fan to stop working when it detects that the temperature in the first area exceeds the second threshold value.

[0008] In some embodiments, at least a portion of the protector is located in the first area for detecting the temperature in the first area, and the protector can control the circuit of the heating component to be disconnected when detecting that the temperature in the first area exceeds the first threshold.

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

[0010] In some embodiments, at least a portion of the on-off component is located in the first area for detecting the temperature in the first area, and the on-off component can control the circuit of the first fan to be disconnected when detecting that the temperature in the first area exceeds the second threshold.

[0011] In some embodiments, the on-off component is disposed on a side of the first fan facing the heating component and is electrically connected to the first fan.

[0012] In some embodiments, the on-off assembly includes a shell, an elastic component, a first wiring member, a second wiring member, a pushing member and a deformable member covering one end of the shell, the shell is embedded in a side of the first fan facing the heating component, the first wiring member and the second wiring member are spaced apart in the shell, and one end of both extends out of the shell, the parts of the first wiring member and the second wiring member located outside the shell are electrically connected to the first fan, the elastic component is arranged in the shell and electrically abuts the first wiring member and the second wiring member, the pushing member is located in the shell and abuts between the elastic component and the deformable member, and the deformable member is configured to arch toward the shell when the temperature in the first area exceeds the second threshold value, so that the pushing member pushes the elastic component to elastically contract.

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

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

[0015] A safety control method for a heater adopts any of the above-mentioned heaters, and the method comprises 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 a heating component to stop working.

[0016] The safety control method of the above-mentioned heater adopts the above-mentioned heater. When the second fan fails or the air outlet corresponding to the second fan is partially blocked, the heat generated by the heating component at the second fan cannot be directly discharged from the heater, and will gather towards the first fan, so that the ambient temperature of the first fan can first exceed the second threshold. At this time, the on-off component controls the first fan to stop working, so that the heat generated by the heating component at the first fan cannot be effectively discharged from the heater, which aggravates the increase in the ambient temperature of the first fan to exceed the first threshold, so that the protector controls the heating component to stop working. With such a design, the heater can effectively and timely control the heating component to stop working regardless of any of the above accidents, thereby achieving effective safety protection. At the same time, the present application can achieve effective protection by using one protector to deal with different accidents, reducing the number of protectors in the heater, and the on-off component is arranged on the first fan, without the need to reserve additional installation space and wiring inside the machine, which is conducive to ensuring the compact structure of the heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural explosion diagram of the heater described in some embodiments of the present application.

[0018] Figure 2 The structure of the heater described in some embodiments of the present application is shown in FIG. Figure 1 .

[0019] Figure 3 The structure of the heater described in some embodiments of the present application is shown in FIG. Figure 2 .

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

[0021] Figure 5 The structure of the heater described in some embodiments of the present application is shown in FIG. Figure 3 .

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

[0023] Figure 7 This is a structural cross-sectional view of the channel assembly when abutting according to some embodiments of the present application.

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

[0025] Fig. 9 This is a safety control flow chart of the heater described in some embodiments of the present application.

[0026] 100, heater; 10, machine body; 11, casing; 111, front casing; 112, rear casing; 12, air duct component; 13, air inlet; 14, air outlet; 15, air supply channel; 151, first area; 152, second area; 16, mesh cover assembly; 20, first fan; 30, second fan; 40, heating assembly; 50, protector; 60, on-off assembly; 61, casing; 62, first terminal; 621, fixed connection plate; 63, second terminal; 64, deformation member; 65, push member; 66, elastic member; 661, elastic member; 662, moving contact; 663, moving connection plate; X, height direction. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0033] In some embodiments, please refer to Figure 1 and Figure 2 The present application provides a heater 100, which includes a body 10, a heating component 40, a protector 50 and an on-off component 60. An air inlet 13 and an air outlet 14 are arranged on the body 10, and an air supply channel 15 connected between the air inlet 13 and the air outlet 14 is arranged inside the body 10, and the heating component 40 is arranged in the air supply channel 15. 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 protector 50 is used to control the heating component 40 to stop working when it is detected that the ambient temperature of the first fan 20 exceeds the first threshold value; the on-off component 60 is arranged on the first fan 20, and is used to control the first fan 20 to stop working when it is detected that the ambient temperature of the first fan 20 exceeds the second threshold value, wherein the first threshold value is greater than the second threshold value.

[0034] In the above-mentioned heater 100, the first fan 20 and the second fan 30 are arranged vertically between the heating component 40 and the air inlet 13, so that the heat generated by the heating component 40 can be blown out of the air outlet 14 through the first fan 20 and the second fan 30, so as to meet the heating demand of large air volume and power. Since the heater 100 is equipped with a protector 50 and a switch component 60, and the protector 50 and the switch component 60 are both used to detect the ambient temperature of the first fan 20, therefore, if the first fan 20 fails or the air outlet 14 corresponding to the first fan 20 is partially blocked, the heat generated by the heating component 40 at the first fan 20 cannot be directly discharged from the heater 100, and the refluxed heat easily makes the ambient temperature of the first fan 20 exceed the first threshold value, at which time the heating component 40 is controlled to stop working by the protector 50. If the second fan 30 fails or the air outlet 14 corresponding to the second fan 30 is partially blocked, the heat generated by the heating component 40 at the second fan 30 cannot be directly discharged from the heater 100, and will gather toward the first fan 20, so that the ambient temperature of the first fan 20 can first exceed the second threshold. At this time, the on-off component 60 controls the first fan 20 to stop working, so that the heat generated by the heating component 40 at the first fan 20 cannot be effectively discharged from the heater 100, exacerbating the increase in the ambient temperature of the first fan 20 to exceed the first threshold, so that the protector 50 controls the heating component 40 to stop working. With such a design, the heater 100 can effectively and timely control the heating component 40 to stop working regardless of any of the above accidents, thereby achieving effective safety protection. At the same time, this embodiment can achieve effective protection by using one protector 50 to deal with different accidents, reducing the number of protectors 50 in the heater 100, and the on-off component 60 is arranged on the first fan 20, without the need to reserve additional installation space and wiring inside the machine, which is conducive to ensuring the compact structure of the heater 100.

[0035] It should be noted that, when designing safety protection, if the protector 50 is designed to detect the ambient temperature of the second fan 30, it can effectively protect the second fan 30 from failure or the air outlet 14 corresponding to the second fan 30 from being partially blocked. However, since the density of hot air is relatively light, when the first fan 20 fails or the air outlet 14 corresponding to the first fan 20 is partially blocked, the protector 50 cannot detect in time that the ambient temperature exceeds the first threshold, causing the heater 100 to be damaged or a fire to occur before the heating component 40 is interrupted, and cannot 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 the first fan 20 from failure or the air outlet 14 corresponding to the first fan 20 from being partially blocked. If the second fan 30 fails or the air outlet 14 corresponding to the second fan 30 is partially blocked, although the heat generated by the heating component 40 at the second fan 30 can be gathered toward the first fan 20 due to its light density, the first fan 20 is in normal operation and can discharge most of the heat from the air outlet 14, resulting in the temperature detected by the protector 50 not being able to exceed the first threshold in time, causing the heating component 40 to be unable to stop working. At this time, although the hot air generated by the heating component 40 will diffuse toward the first fan 20, a large part of the heat will still remain near the second fan 30, and the temperature will continue to rise, causing the electrical components near the second fan 30 to be damaged due to high temperature, or the injection molded structural parts around the second fan 30 to be melted and damaged, and even causing risks such as fire, so this solution cannot provide effective safety protection.

[0037] Of course, if the protector 50 is provided at both the first fan 20 and the second fan 30, effective temperature monitoring and protection can be achieved for the first fan 20 and the second fan 30. However, the additionally introduced protector 50 not only increases the preparation cost, but also requires the installation space of the protector 50 and the wiring space of the protector 50 to be reserved in the heater 100, which seriously affects the compactness of the heater 100.

[0038] To this end, in this embodiment, a switch component 60 is provided on the first fan 20, and the switch component 60 on the first fan 20 is used to monitor the ambient temperature of the first fan 20. If the ambient temperature does not exceed the first threshold but exceeds the second threshold, the first fan 20 can be controlled to stop working. The specific values ​​of the first threshold and the second threshold can be determined according to the volume and power of the heater 100. For example, the first threshold can be set at but not limited to 150°C~200°C, and the second threshold can be set at but not limited to 100°C~150°C.

[0039] It should also be noted that the protector 50 is a device that can control the heating component 40 to stop working when the detected temperature exceeds the first threshold value. For example, when the detected temperature exceeds the first threshold value, the protector 50 is disconnected, so that the circuit of the heating component 40 is disconnected, thereby stopping the heating component 40. There are many types of protectors 50, such as but not limited to liquid expansion thermostats, bimetallic thermostats, hydraulic thermostats, etc.

[0040] Meanwhile, the on-off component 60 can control the first fan 20 to stop working when the detected temperature exceeds the second threshold value, and its type can also be of various designs, such as but not limited to a thermal protection switch.

[0041] For further information, please refer to Figures 2 to 4 , the first area 151 and the second area 152 are defined between the heating component 40 and the air inlet 13, both of which are located in the air supply channel 15, the first area 151 is higher than the second area 152, the first fan 20 is arranged in the first area 151, and the second fan 30 is arranged in the second area 152, the protector 50 controls the heating component 40 to stop working when it detects that the temperature in the first area 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 area 151 exceeds the second threshold. It can be seen that the first area 151 and the second area 152 are defined between the heating component 40 and the air outlet 14, and the first fan 20 and the second fan 30 are respectively arranged in the first area 151 and the second area 152, so that the protector 50 and the on-off component 60 detect the temperature in the first area 151, and can effectively obtain the ambient temperature of the first fan 20, so that the protector 50 and the on-off component 60 can achieve effective safety protection.

[0042] It should be noted that when the second fan 30 fails 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 area 152 cannot be discharged and forms heat reflux, causing the temperature of the second area 152 to rise. Since the density of hot air is relatively light, the hot air in the second area 152 will gather in the first area 151, causing the temperature in the first area 151 to rise. When the temperature of the first area 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 area 151 to be unable to be discharged and aggravating the temperature rise in the first area 151, so that the temperature in the first area 151 exceeds the first threshold.

[0043] For further information, please refer to Figure 4 , at least part of the protector 50 is located in the first area 151, and is used to detect the temperature in the first area 151, and the protector 50 can control the circuit of the heating component 40 to be disconnected when detecting that the temperature in the first area 151 exceeds the first threshold. In this way, by controlling the circuit of the heating component 40, the operation of the heating component 40 can be effectively controlled. For example: when the temperature in the first area 151 exceeds the first threshold, the circuit of the heating component 40 is disconnected, so that the heating component 40 is powered off and cannot continue to heat. At the same time, at least part of the protector 50 is located in the first area 151, so that the temperature detected by the protector 50 can more timely and effectively reflect the accident occurring at the second fan 30, thereby improving the timeliness of safety protection.

[0044] It should be noted that the protector 50 is at least partially located in the first area 151, which may be located between the heating assembly 40 and the first fan 20; or located on the side of the first fan 20 facing away from the heating assembly 40, etc. At the same time, the first area 151 is arranged higher than the second area 152 and is connected to the second area 152, so that the heat in the second area 152 is allowed to gather in the first area 151. In addition, both the first area 151 and the second area 152 can be extended in 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. In this way, it is convenient to effectively control the circuit of the heating component 40 and achieve effective safety protection. It should be noted that the specific series circuit of 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, and it is sufficient that the two are connected in series.

[0046] In some embodiments, please refer to Figure 4 , the protector 50 is located between the heating component 40 and the first fan 20. It can be seen that the protector 50 is arranged between the heating component 40 and the first fan 20, so that the protector 50 detects the temperature of the first area 151 located between the heating component 40 and the first fan 20, ensuring that the protector 50 can more accurately and effectively determine whether the heater 100 has a fault, thereby improving the accuracy of the safety protection. At the same time, the protector 50 is arranged between the heating component 40 and the first fan 20, which is also convenient for wiring between the protector 50 and the heating component 40, which is conducive to improving the assembly efficiency of the heater 100.

[0047] In some embodiments, please refer to Figure 2 , at least part of the on-off component 60 is located in the first area 151, and is used to detect the temperature in the first area 151, and the on-off component 60 can control the circuit of the first fan 20 to be disconnected when detecting that the temperature in the first area 151 exceeds the second threshold. In this way, by controlling the on-off of the circuit of the first fan 20, the operation of the first fan 20 can be effectively controlled. For example: when the temperature in the first area 151 exceeds the second threshold, the circuit of the first fan 20 is disconnected, so that the first fan 20 is powered off and cannot continue to heat. At the same time, at least part of the on-off component 60 is located in the first area 151, so that the temperature detected by the on-off component 60 can more timely and effectively reflect the accident occurring at the second fan 30, thereby improving the timeliness of safety protection.

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

[0049] For further information, please refer to Figure 5 and Figure 6 The switch component 60 is disposed on a side of the first fan 20 facing the heating component 40 and is electrically connected to the first fan 20. In this design, the switch component 60 is disposed on a side of the first fan 20 facing the heating component 40, so that the switch component 60 can detect the ambient temperature between the heating component 40 and the first fan 20, ensuring that the switch component 60 can more accurately and effectively determine whether the heater 100 has a fault, thereby improving the accuracy of safety protection.

[0050] It should be noted that there are many ways to set the on-off component 60 on the first fan 20, such as: the on-off component 60 is fixed on the surface of the first fan 20; or, the on-off component 60 is embedded in the first fan 20, but at least partially exposed on the surface of the first fan 20 to detect the ambient temperature of the first fan 20.

[0051] For further information, please refer to Figure 7 and Figure 8 The switch assembly 60 includes a housing 61, an elastic component 66, a first terminal 62, a second terminal 63, a pusher 65, and a deformable component 64 covering one end of the housing 61. The housing 61 is embedded in a side of the first fan 20 facing the heating component 40. The first terminal 62 and the second terminal 63 are spaced apart in the housing 61, and one end of both of them extends out of the housing 61. The first terminal 62 and the second terminal 63 are located outside the housing 61. The parts of the first terminal 62 and the second terminal 63 located outside the housing 61 are electrically connected to the first fan 20. The elastic component 66 is located in the housing 61 and electrically abuts against the first terminal 62 and the second terminal 63. The pusher 65 is located in the housing 61 and abuts between the elastic component 66 and the deformable component 64. The deformable component 64 is configured to be able to arch toward the housing 61 when the temperature in the first area 151 exceeds the second threshold value, so that the pusher 65 pushes the elastic component 66 to elastically contract.

[0052] It can be seen that when the elastic component 66 abuts against the first wiring member 62 and the second wiring member 63 by its own elasticity, the first wiring member 62 and the second wiring member 63 are connected through the elastic component 66, so that the circuit of the first fan 20 is turned on, ensuring the normal operation of the first fan 20. When the ambient temperature of the first fan 20 exceeds the second threshold, the deformable member 64 arches toward one side of the housing 61, driving the pusher 65 to push the elastic component 66 to elastically contract, so that the elastic component 66 is separated from the first wiring member 62 and the second wiring member 63, and the connection between the first wiring member 62 and the second wiring member 63 is disconnected. At this time, the circuit of the first fan 20 is disconnected and is in a stopped working state. When the ambient temperature of the first fan 20 returns to normal temperature, the deformation of the deformable member 64 decreases, the elastic component 66 returns to the initial state by its own elasticity, and abuts against the first wiring member 62 and the second wiring member 63 again, so that the circuit of the first fan 20 is closed again.

[0053] It should be noted that the deformable member 64 refers to a structure that is deformed by temperature, which may be, but not limited to, an aluminum sheet cover, etc. Since the pusher 65 pushes the elastic member 66 to contract under the arch of the deformable member 64, the pusher 65 may be a structure with a certain strength; at the same time, to prevent the pusher 65 from being conductive, the pusher 65 may be designed to be an insulating material, such as, but not limited to, plastic, ceramic, etc.

[0054] At the same time, when the deformable member 64 is not deformed or recovers its deformation, the elastic member 66 can rely on its own elasticity to abut against the first connecting member 62 and the second connecting member 63 again. There are many structural designs, for example: please refer to Figure 7 and Figure 8 , the elastic component 66 may include an elastic member 661 and a moving contact 662 disposed on the elastic member 661, and the push member 65 abuts between the deformable member 64 and the elastic member 661. At this time, the moving contact 662 abuts against the first wiring member 62 and the second wiring member 63 under the action of the elastic member 661 to achieve conduction between the first wiring member 62 and the second wiring member 63. Among them, the abutment of the moving contact 662 with the first wiring member 62 and the second wiring member 63 respectively can be direct abutment; it can also be indirect abutment. For example: one end of the first wiring member 62 is connected to a fixed connection plate 621, and a moving connection plate 663 is provided on the moving contact 662. When the moving contact 662 is under the action of the elastic member 661, the moving connection plate 663 abuts against the second wiring member 63 and the fixed connection plate 621 respectively. In addition, the elastic member 661 can have a variety of structures, such as: it can be but not limited to a spring, a metal spring, an elastic rubber, etc.

[0055] In some embodiments, the elastic member 661 includes an elastic metal sheet, which is bent to form two bent edges, one of which abuts against the bottom of the housing 61 and the other abuts against the push member 65 , and the moving contact 662 is disposed on the abutting edge against the push member 65 .

[0056] In some embodiments, the heating assembly 40 is configured as a heater of a positive temperature coefficient thermistor. The positive temperature coefficient thermistor is a PTC (Positive Temperature Coefficient) thermistor, which is a temperature-sensitive semiconductor resistor. When the temperature exceeds a certain temperature (Curie temperature), the resistance value thereof increases stepwise with the increase of the temperature; below the Curie temperature, the resistance value thereof is small.

[0057] When the heating component 40 is a heater of a positive temperature coefficient thermistor, the first fan 20 and the second fan 30 discharge the heat generated by the heating component 40 out of the heater 100, so that the surface temperature of the heating component 40 will decrease and be below the Curie temperature. At this time, the resistance of the heating component 40 remains very small, and the heating component 40 will continue to heat; when the first fan 20 and / or the second fan 30 are blocked and cannot rotate, the heat generated by the heating component 40 cannot be discharged out of the heater 100 in time, and the surface temperature of the heating component 40 will soon reach the Curie temperature. After reaching the Curie temperature, the resistance of the PTC thermistor will become very large, and the current passing through the PTC thermistor is very small at this time, and the heating component 40 is almost in a disconnected and non-heating state.

[0058] It can be seen from this that the heating component 40 is designed as a heater of a positive temperature coefficient thermistor. When an accident occurs in the heater 100, such as: the second fan 30 fails or the air outlet 14 corresponding to the second fan 30 is partially blocked, the heat generated by the heating component 40 at the second fan 30 cannot be discharged from the air outlet 14 and flows back to the second fan 30. Due to the low density of hot air, the generated heat gathers at the first fan 20, so that the ambient temperature of the first fan 20 exceeds the second threshold, so that the on-off component 60 controls the first fan 20 to stop working, exacerbating the internal temperature of the heater 100 to rise above the Curie temperature. At this time, the resistance of the heating component 40 becomes higher, and the current passing through the heating component 40 is reduced to achieve self-protection. At the same time, when the temperature of the first fan 20 exceeds the first threshold, the protector 50 will also control the heating component 40 to stop working. With this design, double safety protection is achieved for the heater 100.

[0059] In some embodiments, please refer to Figure 1 The machine body 10 includes a housing 11 and an air duct component 12 disposed in the housing 11, an air inlet 13 and an air outlet 14 are disposed on the housing 11 at intervals, 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 heat generated by the heating component 40 to be discharged out of the air outlet 14.

[0060] It should be noted that there are many ways to install the air duct component 12 in the housing 11, such as but not limited to clamping, bolting, bonding, pinning, etc. At the same time, to facilitate the assembly of the air duct component 12 in the housing 11, the housing 11 may include a front housing 111 and a rear housing 112 that cooperates with the front housing 111, the air outlet 14 is arranged on the front housing 111, the air inlet 13 is arranged on the rear housing 112, and the air duct component 12 is arranged on the front housing 111 and the rear housing 112. Among them, the connection between the front housing 111 and the rear housing 112 may be but not limited to clamping, riveting, bolting, etc.

[0061] In addition, in order to prevent impurities from entering the heater 100 from the air outlet 14 and the air inlet 13 , a mesh cover assembly 16 may be provided at the air outlet 14 and the air inlet 13 , respectively.

[0062] In some embodiments, please refer to Fig. 9 The present application provides a safety control method for a heater, using any of the above heaters 100, the method comprising the following steps:

[0063] S100, in response to the ambient temperature of the first fan 20 exceeding a second threshold, controlling the first fan 20 to stop working;

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

[0065] The safety control method of the above-mentioned heater adopts the above-mentioned heater 100. When the second fan 30 fails or the air outlet 14 corresponding to the second fan 30 is partially blocked, the heat generated by the heating component 40 at the second fan 30 cannot be directly discharged from the heater 100, and will gather toward the first fan 20, so that the ambient temperature of the first fan 20 can first exceed the second threshold. At this time, the on-off component 60 controls the first fan 20 to stop working, so that the heat generated by the heating component 40 at the first fan 20 cannot be effectively discharged from the heater 100, aggravating the increase in the ambient temperature of the first fan 20 to exceed the first threshold, so that the protector 50 controls the heating component 40 to stop working. With such a design, the heater 100 can effectively and timely control the heating component 40 to stop working regardless of any of the above accidents, thereby achieving effective safety protection. At the same time, the present application can achieve effective protection by using one protector 50 to deal with different accidents, reducing the number of protectors 50 in the heater 100, and the on-off assembly 60 is arranged on the first fan 20, without the need to reserve additional installation space and wiring inside the machine, which is conducive to ensuring the compact structure of the heater 100.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A fan heater, characterized in that: The heater comprises: A machine body (10) having an air inlet (13) and an air outlet (14) spaced apart thereon, and an air supply passage (15) communicating between the air inlet (13) and the air outlet (14) is provided therein; A heating component (40) is arranged in the air supply channel (15); 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 a height direction (X) of the machine body (10); A protector (50) for controlling the heating component (40) to stop working when it is detected that the ambient temperature of the first fan (20) exceeds a first threshold value; 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 it is detected that the ambient temperature of the first fan (20) exceeds a second threshold, wherein the first threshold is greater than the second threshold.

2. The air heater according to claim 1, characterized in that: A first area (151) and a second area (152) are defined between the heating component (40) and the air inlet (13), both of which are located in the air supply channel (15); the first area (151) is higher than the second area (152); the first fan (20) is arranged in the first area (151); the second fan (30) is arranged in the second area (152); the protector (50) controls the heating component (40) to stop working when it detects that the temperature in the first area (151) exceeds the first threshold value; and the on-off component (60) controls the first fan (20) to stop working when it detects that the temperature in the first area (151) exceeds the second threshold value.

3. The air heater according to claim 2, characterized in that: At least a portion of the protector (50) is located in the first area (151) and is used to detect the temperature in the first area (151), and the protector (50) can control the circuit of the heating component (40) to be disconnected when detecting that the temperature in the first area (151) exceeds the first threshold.

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

5. The air heater according to claim 2, characterized in that: At least a portion of the on-off component (60) is located in the first area (151) and is used to detect the temperature in the first area (151), and the on-off component (60) can control the circuit of the first fan (20) to be disconnected when detecting that the temperature in the first area (151) exceeds the second threshold.

6. The air heater according to claim 5, characterized in that: The on-off component (60) is arranged on a side of the first fan (20) facing the heating component (40), and is electrically connected to the first fan (20).

7. The air heater according to claim 6, characterized in that: The on-off assembly (60) comprises a shell (61), an elastic component (66), a first wiring member (62), a second wiring member (63), a pushing member (65), and a deformable member (64) covering one end of the shell (61); the shell (61) is embedded in a side of the first fan (20) facing the heating component (40); the first wiring member (62) and the second wiring member (63) are spaced apart in the shell (61), and one end of both of them protrudes out of the shell (61); the parts of the first wiring member (62) and the second wiring member (63) located outside the shell (61) are electrically connected to the first fan (20); The elastic component (66) is arranged in the shell (61) and electrically abuts against the first wiring member (62) and the second wiring member (63); the pushing member (65) is located in the shell (61) and abuts between the elastic component (66) and the deformable member (64); the deformable member (64) is configured to be able to arch toward the shell (61) when the temperature in the first area (151) exceeds the second threshold value, so that the pushing member (65) pushes the elastic component (66) to elastically contract.

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

9. The air heater according to any one of claims 1 to 7, characterized in that: The machine body (10) comprises a casing (11) and an air duct component (12) arranged in the casing (11); the air inlet (13) and the air outlet (14) are arranged on the casing (11) at intervals; and the air supply channel (15) is arranged on the air duct component (12).

10. A safety control method for a heater, using the heater according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: In response to the ambient temperature of the first fan (20) exceeding a second threshold, controlling the first fan (20) 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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