A heater with a PTC heating structure

Abstract

The present invention relates to a heater with a PTC heating structure, comprising an air outlet module, a housing module, a control module and an air source module, wherein the air source module is fixedly mounted on the air outlet module, and the two ends of the housing module are detachably connected with the air outlet module and the control module, respectively, and the air outlet module comprises an air outlet housing detachably connected to the housing module by plugging, and a concave slot air duct is provided in the middle of the inner side of the air outlet housing, and a PTC element is detachably installed in the concave slot air duct, and the housing module comprises a first housing and a second housing, and the first housing and the second housing are detachably connected by plugging; the control module is detachably connected to the housing module by snap-fitting, and a plurality of card boards are provided on the inner side of one end of the first housing and the second housing connected to the control module, and the first housing and the second housing are plug-connected to snap the control module onto the card board. The heater of the present invention adopts a modular design, and each module is independently arranged and detachably connected, and has the advantages of low use cost, stable connection and good air outlet effect.

Description

Technical Field

[0001] The invention relates to the technical field of air heaters, in particular to an air heater with a PTC heating structure. Background Art

[0002] A heater is a ventilator that can emit warm air. It is a combined unit composed of a motor and a radiator, including three parts: heating, blowing, and control and protection. It is suitable for forced circulation air heating in homes, villas, various types of workshops and large buildings, and can make the room temperature reach the required temperature in a short time.

[0003] At present, the application of air heaters is becoming more and more widespread, and has become a common electrical appliance for people to keep warm in winter. Existing air heaters are generally provided with a shell, and the inner circuit board, heating components and other components are protected by the shell.

[0004] The existing heater shell generally includes a shell surrounding the outer periphery of the heater body and a top cover arranged on the upper end of the heater body. The connection structure between the shells and between the top cover and the shell of the existing heater is complicated, and the assembly is cumbersome, resulting in low assembly efficiency. In addition, the shell of the existing heater is generally connected by screws, which is time-consuming and labor-intensive, and has high processing costs. After assembly, the screws and screw holes are exposed on the surface of the shell, affecting the overall appearance.

[0005] In order to solve the problem of the difficulty in connecting and disassembling the existing heater shell, the Chinese invention patent with the announcement number CN 206160473 U discloses a modular heater, which divides the heater into a functional module and an appearance module, and installs the functional module inside the appearance module. The appearance module consists of a casing, a cover plate, a bracket and two decorative side covers. The cover plate is installed on the casing, and the decorative side covers are fixed to the left and right ends of the casing. The functional module includes a motor, a wind wheel, an electric control, a power board, a front end board and a PTC heater. One end of the wind wheel is coaxially connected to the motor and the other end is fixed to the bearing bracket. The PTC heater is installed in the radial direction of the wind wheel, so that the functional module and the appearance module are relatively independent, solving the problem of inconvenient disassembly and maintenance. However, the cover plate, decorative side cover, etc. in the appearance module are still fixed by screws, and the problem of laborious disassembly and assembly of the appearance module is not solved.

[0006] There are two main types of existing heater outlet modules. The first type is that the PTC element is fixedly installed at the heater outlet module, and the second type is that the PTC element is detachably installed at the heater outlet module. The second type generally uses a connecting piece to connect the PTC element and the outlet module respectively, and the connecting piece is detachably connected to the outlet module and the PTC element respectively. This detachable connection method using a connecting piece often requires the use of at least two or more connecting pieces.

[0007] The above two PTC component installation methods have the following disadvantages:

[0008] 1. The first fixed installation method has a firm connection, but it cannot be disassembled. When any of the components is damaged, the entire component needs to be replaced, which greatly increases the cost of use;

[0009] The second detachable installation method realizes detachable connection, which solves the problem of needing to replace the entire component when any component is damaged. However, it uses multiple connecting plates to fix and clamp multiple positions of the PTC component. When the connection of any of the connecting plates is loose, the PTC component and the air outlet module may become loose, greatly affecting the heating effect of the PTC component and the overall heating effect of the heater. Summary of the invention

[0010] The invention provides a heater with a PTC heating structure which is convenient to assemble and disassemble, has low use cost, stable connection and good air outlet effect.

[0011] In order to achieve the above purpose, the following technical solutions are adopted.

[0012] A heater with a PTC heating structure includes an air outlet module, a housing module, a control module and an air source module, wherein the air source module is fixedly mounted on the air outlet module, and the two ends of the housing module are detachably connected with the air outlet module and the control module. The heater with a PTC heating structure of the present invention adopts a modular design, and each module is independent of each other and detachably connected, so that when any module in the present invention is damaged, only the damaged module can be replaced without discarding the entire heater, thereby greatly reducing the use cost.

[0013] The air outlet module includes an air outlet shell which is plug-in and detachably connected to the casing module, a concave slot air duct is provided in the middle of the inner side of the air outlet shell, a plurality of air source installation columns for installing the air source module are provided on the outside of the concave slot air duct, the slot bottom of the concave slot air duct is an air outlet grille, a PTC element is detachably installed in the concave slot air duct, the concave slot air duct is surrounded by side panel assemblies for connecting the PTC element, and the side panel assemblies are provided with a slot for engaging the PTC element and a stopping structure for stopping the PTC element. The air outlet module realizes a detachable connection between the PTC element and the air outlet shell by setting a concave slot air duct in the air outlet shell and setting a side panel assembly of the concave slot air duct, so that when the PTC element in the air outlet module or any component of the air outlet shell is damaged, only the damaged component needs to be replaced without replacing the entire component, thereby greatly reducing the cost of use; the groove bottom and side panel assembly of the concave slot air duct are set, the concave slot air duct is an integral structure, and a stopping structure is set on the side panel assembly, so that the connection between the PTC element and the air outlet shell is stable and not easy to loosen, thereby effectively ensuring the air outlet effect.

[0014] The housing module is a main housing, and the main housing includes a first housing and a second housing, and the first housing and the second housing are plug-in detachably connected. The control module includes a control housing that is plug-in detachably connected to the housing module, and the inner sides of the ends of the first housing and the second housing connected to the control housing are each provided with a plurality of card plates for plugging the control housing, and the first housing and the second housing are plug-in connected to plug the control housing onto the card plates. The main housing is composed of a first housing and a second housing that are detachably connected, and the control module is plug-inly engaged between the first housing and the second housing, effectively ensuring the stability of the connection between the control module and the housing module.

[0015] Furthermore, the first housing is provided with a first plug-in column, the second housing is provided with a first plug-in slot matched with the first plug-in column, and the first housing and the second housing are plugged and connected to each other through the first plug-in column and the first plug-in slot. During installation, the control housing on the control module is first installed between the first housing and the second housing, and then the first housing and the second housing are plugged and connected, and the control module is installed in the first housing and the second housing.

[0016] Furthermore, the outer side of the air outlet housing extends outward along a circle and is inserted into the air outlet side wall of the main housing, and the air outlet side wall is provided with a plurality of buckle extensions extending inwardly, and one end of the main housing connected to the air outlet housing is provided with an L-shaped notch for abutting against the air outlet side wall, and the bottom of the L-shaped notch is provided with a plurality of air outlet fasteners extending inwardly, and the end of the air outlet fastener is provided with an air outlet buckle portion for abutting against the buckle extension. During installation, the air outlet side wall of the air outlet housing is inserted into the L-shaped notch on the main housing, and the air outlet fastener and the air outlet buckle portion at the bottom of the L-shaped notch are arranged to abut against the buckle extensions extending from the air outlet side wall, effectively preventing the air outlet housing from moving in the main housing, and further ensuring the stability of the connection between the air outlet housing and the main housing.

[0017] Furthermore, an upper plug-in slot is provided at the top of one end of the main housing connected to the air outlet housing, a lower plug-in slot is provided at the bottom of one end of the main housing connected to the air outlet housing, an upper plug-in block for inserting into the upper plug-in slot and a lower plug-in block for inserting into the lower plug-in slot are provided at the top and bottom of one side where the air outlet housing is plugged into the main housing, respectively, and a gap is left between the upper plug-in block and the lower plug-in block and the air outlet side arm. The upper plug-in block and the lower plug-in block at the top and bottom of the air outlet housing, and the upper plug-in slot and the lower plug-in slot at the top and bottom of the main housing are provided so that the upper plug-in block and the lower plug-in block at the top and bottom of the air outlet housing are respectively inserted into the upper plug-in slot and the lower plug-in slot at the top and bottom of the main housing, further increasing the stability of the connection between the air outlet housing and the main housing.

[0018] Furthermore, the air outlet side wall transitions in an arc shape from the outside of the air outlet shell and then extends to form the air outlet side wall, so that the heater has a beautiful appearance and enhances the user experience.

[0019] Furthermore, the side panel assembly includes an upper side panel, a lower side panel and two long side panels relatively distributed on both sides of the PTC element, the lower side panel is provided with a plurality of slots for plugging in the PTC element, the inner side of the long side panel is provided with a stopping structure for stopping the PTC element, the stopping structure is a connecting plate, the end of the connecting plate is provided with a connecting buckle, the slot cooperates with a plurality of plug-in blocks at one end of the PTC element, the connecting plate and the end connecting buckle are provided for stopping the PTC element after the PTC element is placed in the concave groove air duct, preventing the PTC element from moving out of the concave groove air duct, and effectively ensuring the stability of the connection between the PTC element and the concave groove air duct.

[0020] Furthermore, the connecting piece is made of elastic material. When the PTC element is placed in the concave groove air duct, the connecting piece moves outward under the pressure from the PTC element, so that the PTC element is smoothly placed in the concave groove air duct. After the PTC element is completely separated from the connecting piece, the connecting piece returns to its original position under the action of elastic force, and the connection buckle at the end of the connecting piece stops the PTC element, preventing the PTC element from escaping from the concave groove air duct.

[0021] Furthermore, the connecting piece and the long side plate are an integrally formed structure, which further ensures the stability of the connecting piece in blocking the PTC element and effectively prevents the PTC element from falling out.

[0022] Furthermore, a heat dissipation channel is reserved between the PTC element and the side plate of the concave slot air duct and the air outlet grille at the bottom. The side plate of the concave slot air duct is provided with a plurality of abutting portions for abutting the PTC element, and the abutting portions form a first heat dissipation channel between the PTC element and the side plate of the concave slot air duct; the air outlet grille at the bottom of the concave slot air duct is provided with a plurality of support plates for supporting the PTC element, and the support plates form a second heat dissipation channel between the PTC element and the air outlet grille at the bottom of the concave slot air duct. The setting of the heat dissipation channel leaves a certain space between the side plate assembly and the slot bottom plate of the concave slot air duct and the PTC element, avoiding direct contact between the side plate assembly and the slot bottom plate and the PTC element, which effectively ensures the heat dissipation effect on the one hand, and effectively improves the service life of the concave slot air duct on the other hand, thereby improving the service life of the air outlet shell.

[0023] Furthermore, a heat dissipation flow groove is provided in the middle of the support plate, and the heat dissipation flow groove is connected to the second heat dissipation channel to form a flow-type heat dissipation channel between the bottom of the PTC element and the bottom plate of the concave groove duct groove, which is beneficial to improving the heat dissipation effect.

[0024] Furthermore, the two long side panels of the concave slot air duct are also provided with a temperature limit notch, and a temperature limit mounting column is provided on the outside of the temperature limit notch, and a temperature limit protector is installed on the temperature limit mounting column. The sensing point of the temperature limit protector is located at the temperature limit notch, and the temperature limit protector is installed on the temperature limit mounting column through a temperature limit frame. The temperature limit mounting column is a hollow mounting column, and the temperature limit frame is installed on the temperature limit mounting column through fasteners. The installation of the temperature limit protector is used to detect the temperature of the PTC element. When the temperature of the PTC element reaches or exceeds the upper limit value, the temperature limit protector is activated and the circuit is cut off, effectively avoiding accidents caused by excessive heating temperature of the PTC element.

[0025] Furthermore, the air outlet housing is provided with a plurality of air source mounting columns for mounting an air source module, the air source module is mounted on the air source mounting columns of the air outlet housing by fasteners, the air source module comprises a motor, a fan housing and a wind wheel, the fan housing comprises a first fan housing and a second fan housing, the first fan housing and the second fan housing are detachably connected, the motor is mounted on the first fan housing by fasteners, the wind wheel is mounted on the driving shaft of the motor, a hanging buckle is provided on the first fan housing, a buckle block matching the hanging buckle is provided on the second fan housing at a position corresponding to the hanging buckle on the first fan housing, the outer surface of the buckle block is arranged as an inclined surface, which is convenient for installation and disassembly

[0026] Furthermore, one end of the main housing connected to the control module is an arc-shaped end extending inward, and a plurality of cardboards are arranged inside the arc-shaped end, and the cardboard is a U-shaped cardboard in a laid-down shape, and both side plates of the U-shaped cardboard are provided with U-shaped card slots for engaging the control housing. The U-shaped card slots on the plurality of U-shaped cardboards are combined together to form an engaging channel for engaging the control housing, and the plurality of U-shaped cardboards are dispersed inside the arc-shaped end, which effectively ensures the engaging strength of the engaging channel on the one hand, and effectively saves materials on the other hand.

[0027] Furthermore, the control shell is a plate-like structure, and the control shell includes a snap-fit ​​plate and a control plate. The control plate is located on the outside of the snap-fit ​​plate and forms a step-like structure with the snap-fit ​​plate. The thickness of the snap-fit ​​plate is adapted to the U-shaped slot. A gear knob and a temperature control knob are installed on the control shell. The control shell is provided with a mounting slot for installing the gear knob and the temperature control knob. The gear knob and the temperature control knob are provided to adjust and control the air volume and temperature of the heater. The control shell is a plate-like design. When installing, the snap-fit ​​plate on the control shell is installed into the snap-fit ​​channel formed by a plurality of slots, and then the first housing and the second housing are plug-in connected. On the one hand, it uses less raw materials and is simple to manufacture. On the other hand, it is easy to install and use.

[0028] Compared with the prior art, the heater with a PTC heating structure of the present invention has the following beneficial effects:

[0029] First, the structure is simple. The heater with a PTC heating structure of the present invention is mainly composed of an air outlet module, a housing module, a control module and an air source module. Each module is independently designed, with a small number of modules, a simple structure and easy installation.

[0030] Second, the connection is detachable. The two ends of the housing module are detachably connected to the air outlet module and the control module. When installing, the air source module is first installed on the air outlet module, and the air outlet of the air source module corresponds to the concave slot air duct of the air outlet module. Then the control module is installed on the housing module and clamped by the first housing and the second housing. Finally, the air outlet module with the air source module installed is plugged and installed on the housing module. The entire installation and disassembly process is not only simple and convenient, but also does not require screwing, which effectively solves the time-consuming and labor-intensive problem of screwing between various components in the prior art. Moreover, when one of the modules is damaged, the module can be directly replaced without discarding the entire heater, which greatly saves the use cost.

[0031] Third, the connection stability between the modules is good. The control shell is placed on the cardboard inside the first shell and the second shell of the main shell, and then the first shell and the second shell are installed by plugging. That is, the control shell is clamped between the first shell and the second shell through the plug-in connection of the first shell and the second shell, which effectively ensures the stability of the clamping connection between the control shell and the main shell. Finally, the air outlet shell is plug-in installed on the other end of the main shell, and the first shell and the second shell are respectively connected through the air outlet shell, so that the connection between the first shell and the second shell is stable and not easy to be disengaged, which ensures the stability of the overall connection of the shell, and then ensures the stability of the connection between the modules;

[0032] Fourth, the air outlet effect is good. The present invention arranges the PTC element in the air outlet module by arranging the groove bottom and the side plate assembly of the concave groove air duct. The concave groove air duct is an integral structure, and the side plate assembly is provided with a stop structure, so that the PTC element is stably connected to the air outlet housing and is not easy to loosen, thereby effectively ensuring the air outlet effect.

[0033] Fifth, it is highly safe to use. The temperature limit protector installed on the outside of the side panel assembly of the air outlet module is used to detect the temperature of the PTC component. When the temperature of the PTC component reaches or exceeds the upper limit value, the temperature limit protector is activated to cut off the circuit, effectively avoiding accidents caused by excessive heating temperature of the PTC component, ensuring the safe use of the heater, and effectively improving the service life of the heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Attached Figure 1 It is an exploded schematic diagram of a heater with a PTC heating structure according to the present invention;

[0035] Attached Figure 2 It is an exploded schematic diagram of the air outlet module in the heater with a PTC heating structure of the present invention;

[0036] Attached Figure 3 For attachment Figure 2 Schematic diagram of the structure of the middle air outlet housing;

[0037] Attached Figure 4 This is a structural schematic diagram of a housing module located on the side of an air outlet module in a heater with a PTC heating structure according to the present invention;

[0038] Attached Figure 5 This is a schematic structural diagram of a housing module located on the control module side of a heater with a PTC heating structure according to the present invention;

[0039] Attached Figure 6 For attachment Figure 4 A schematic diagram of the structure of the first housing;

[0040] Attached Figure 7 For attachment Figure 6 A partial enlarged view of part A;

[0041] Attached Figure 8 For attachment Figure 6 A partial enlarged view of part B in FIG.

[0042] Attached Fig. 9 For attachment Figure 4 A schematic diagram of the structure of the second housing;

[0043] Attached Fig.10 It is an exploded schematic diagram of a control module in a heater with a PTC heating structure according to the present invention;

[0044] Attached Fig.11 It is a schematic diagram of the exploded view of the wind source module in the heater with PTC heating structure of the present invention. DETAILED DESCRIPTION

[0045] In the description of the present invention, it is necessary to understand that terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The fan heater with a PTC heating structure of the present invention will be described in further detail below in conjunction with specific embodiments and drawings.

[0049] Reference Figure 1 A heater with a PTC heating structure includes a housing module 100, an air outlet module 200, a control module 300 and an air source module 400. The air source module 400 is fixedly mounted on the air outlet module 200. The two ends of the housing module 100 are detachably connected with the air outlet module 200 and the control module 300. The heater with a PTC heating structure of the present invention adopts a modular design. Each module is independent of each other and detachably connected. When any module in the present invention is damaged, only the damaged module can be replaced without discarding the entire heater, which greatly reduces the use cost.

[0050] Reference Figures 1 to 3 Specifically, the air outlet module 200 includes an air outlet shell 210 which is plug-in and detachably connected to the casing module 100, a concave slot air duct 220 is provided in the middle of the inner side of the air outlet shell 210, a plurality of air source mounting columns 230 for mounting the air source module 400 are provided on the outside of the concave slot air duct 220, the bottom of the slot of the concave slot air duct 220 is an air outlet grille 221, a PTC element 290 is detachably installed in the concave slot air duct 220, and the concave slot air duct 220 is surrounded by side panel assemblies 240 for connecting the PTC element 290, and a card slot for engaging the PTC element 290 and a stopping structure 242 for stopping the PTC element 290 are provided on the side panel assembly 240. The air outlet module 200 realizes a detachable connection between the PTC element 290 and the air outlet shell 210 by setting a concave groove air duct 220 in the air outlet shell 210 and setting a side panel assembly 240 of the concave groove air duct 220, so that when the PTC element 290 or any component of the air outlet shell 210 in the air outlet module 200 is damaged, only the damaged component needs to be replaced without replacing the entire component, thereby greatly reducing the cost of use; the groove bottom of the concave groove air duct 220 and the side panel assembly 240 are set, the concave groove air duct 220 is an integral structure, and the side panel assembly 240 is provided with a stopping structure 242, so that the PTC element 290 and the air outlet shell 210 are stably connected and not easy to loosen, thereby effectively ensuring the air outlet effect.

[0051] Reference Figure 1 , Figures 4 to 9 The housing module 100 is a main housing, and the main housing includes a first housing 120 and a second housing 130. The bottoms of the first housing 120 and the second housing 130 are both provided with supporting feet 110, and the first housing 120 and the second housing 130 are plug-in detachably connected. Specifically, the first housing 120 is provided with a first plug-in column 121, and the second housing 130 is provided with a first plug-in slot 131 that matches the first plug-in column 121. The first housing 120 and the second housing 130 are plug-in connected to each other through the first plug-in column 121 and the first plug-in slot 131. During installation, first install the control housing on the control module 300 between the first housing 120 and the second housing 130, and then plug-in the first housing 120 and the second housing 130 to connect them, and install the control module 300 in the first housing 120 and the second housing 130.

[0052] Reference Figure 1 , Figure 5 and Fig.10 The control module 300 includes a control housing that is detachably connected to the housing module 100 by snapping, and the inner sides of the ends of the first housing 120 and the second housing 130 connected to the control housing are provided with a plurality of card boards 140 for snapping the control housing, and the first housing 120 and the second housing 130 are plug-connected to snap the control housing onto the card boards 140. The main housing is composed of the first housing 120 and the second housing 130 that are detachably connected, and the control module 300 is snapped between the first housing 120 and the second housing 130, effectively ensuring the stability of the connection between the control module 300 and the housing module 100.

[0053] Reference Figures 1 to 3 The outer side of the air outlet housing 210 extends outward along a circle and is inserted into the air outlet side wall 211 of the main housing. The air outlet side wall 211 extends from the outer side of the air outlet housing 210 in an arc shape and then extends to form the air outlet side wall 211, making the appearance design of the heater beautiful and enhancing the user experience. The air outlet side wall 211 is provided with a plurality of buckle extensions 212 extending inwardly, and one end of the main housing connected to the air outlet housing 210 is provided with an L-shaped notch 170 for abutting against the air outlet side wall 211. The bottom of the L-shaped notch 170 is provided with a plurality of air outlet buckles 160 extending inwardly, and the end of the air outlet buckle 160 is provided with an air outlet buckle portion 161 for abutting against the buckle extension 212. During installation, the air outlet side wall 211 of the air outlet housing 210 is inserted into the L-shaped notch 170 on the main housing. Through the arrangement of the air outlet fastener 160 and the air outlet buckle portion 161 at the bottom of the L-shaped notch 170, the air outlet fastener 160 and the buckle protrusion 212 extending from the air outlet side wall 211 abut against each other, effectively preventing the air outlet housing 210 from moving inside the main housing, further ensuring the stability of the connection between the air outlet housing 210 and the main housing.

[0054] Reference Figures 1 to 9 An upper plug-in slot 150 is provided at the top of one end where the main housing is connected to the air outlet housing 210, and a lower plug-in slot 180 is provided at the bottom of one end where the main housing is connected to the air outlet housing 210. An upper plug-in block 213 for inserting into the upper plug-in slot 150 and a lower plug-in block 214 for inserting into the lower plug-in slot 180 are respectively provided at the top and bottom of one side where the air outlet housing 210 is plugged into the main housing, and a gap is left between the upper plug-in block 213 and the lower plug-in block 214 and the air outlet side arm. The upper plug-in blocks 213 and lower plug-in blocks 214 at the top and bottom of the air outlet shell 210, and the upper plug-in grooves 150 and lower plug-in grooves 180 at the top and bottom of the main shell are arranged so that the upper plug-in blocks 213 and lower plug-in blocks 214 at the top and bottom of the air outlet shell 210 are respectively inserted into the upper plug-in grooves 150 and lower plug-in grooves 180 at the top and bottom of the main shell, thereby further increasing the stability of the connection between the air outlet shell 210 and the main shell.

[0055] Reference Figures 1 to 3 The side plate assembly 240 in the air outlet module 200 includes an upper side plate, a lower side plate and two long side plates relatively distributed on both sides of the PTC element 290. The lower side plate is provided with a plurality of slots 241 for plugging the PTC element 290. The inner side of the long side plate is provided with a stop structure 242 for stopping the PTC element 290. The stop structure 242 is a connecting piece. The end of the connecting piece is provided with a connection buckle 2421. The slot 241 cooperates with a plurality of plug blocks 291 at one end of the PTC element 290. The connection piece and the end connection buckle 2421 are provided to stop the PTC element 290 after the PTC element 290 is placed in the concave slot air duct 220, so as to prevent the PTC element 290 from moving out of the concave slot air duct 220, and effectively ensure the stability of the connection between the PTC element 290 and the concave slot air duct 220. The connecting piece is made of elastic material. When the PTC element 290 is placed in the concave groove air duct 220, the connecting piece moves outward due to the pressure from the PTC element 290, so that the PTC element 290 is smoothly placed in the concave groove air duct 220. After the PTC element 290 is completely separated from the connecting piece, the connecting piece returns to its original position under the action of elastic force, and the connecting undercut 2421 at the end of the connecting piece stops the PTC element 290, preventing the PTC element 290 from falling out of the concave groove air duct 220. The connecting piece and the long side plate are an integrally formed structure, which further ensures the stability of the connecting piece in stopping the PTC element 290 and effectively prevents the PTC element 290 from falling out.

[0056] Reference Figures 1 to 3A heat dissipation channel is reserved between the PTC element 290 and the side plate of the concave slot air duct 220 and the air outlet grille 221 at the bottom. A plurality of abutting portions 243 for abutting the PTC element 290 are distributed on the side plate of the concave slot air duct 220. The abutting portions 243 form a first heat dissipation channel between the PTC element 290 and the side plate of the concave slot air duct 220. A plurality of supporting plates 244 for supporting the PTC element 290 are distributed on the inner side of the air outlet grille 221 at the bottom of the concave slot air duct 220. The supporting plates 244 form a second heat dissipation channel between the PTC element 290 and the air outlet grille 221 at the bottom of the concave slot air duct 220. The heat dissipation channel is set up so that a certain space is left between the side plate assembly 240 and the slot bottom air outlet grille 221 of the concave slot air duct 220 and the PTC element 290, avoiding direct contact between the side plate assembly 240 and the slot bottom plate and the PTC element 290, which effectively ensures the heat dissipation effect on the one hand, and effectively improves the service life of the concave slot air duct 220 on the other hand, thereby improving the service life of the air outlet shell 210. The middle part of the support plate 244 is also provided with a heat dissipation flow groove 2441, which is connected to the second heat dissipation channel, so that a flow-type heat dissipation channel is formed between the bottom of the PTC element 290 and the slot bottom plate of the concave slot air duct 220, which is conducive to improving the heat dissipation effect.

[0057] Reference Figures 1 to 3 The two long side panels of the concave slot air duct 220 are also provided with a temperature-limiting notch 245, and a temperature-limiting mounting column 250 is provided on the outer side of the temperature-limiting notch 245. A temperature-limiting protector 260 is installed on the temperature-limiting mounting column 250, and the sensing point of the temperature-limiting protector 260 is located at the temperature-limiting notch 245. The temperature-limiting protector 260 is installed on the temperature-limiting mounting column 250 through a temperature-limiting frame 261. The temperature-limiting mounting column 250 is a hollow mounting column, and the temperature-limiting frame 261 is installed on the temperature-limiting mounting column 250 through fasteners. The installation of the temperature-limiting protector 260 is used to detect the temperature of the PTC element 290. When the temperature of the PTC element 290 reaches or exceeds the upper limit value, the temperature-limiting protector 260 is activated to cut off the circuit, effectively avoiding accidents caused by excessive heating temperature of the PTC element 290.

[0058] Reference Figure 1 , Figure 2 , Figure 3 and Fig.11The air outlet housing 210 is also provided with a plurality of air source mounting columns 230 for mounting the air source module 400. The air source module 400 is mounted on the air source mounting columns 230 of the air outlet housing 210 by fasteners. The air source module 400 includes a motor 410, a fan housing 420 and a wind wheel 430. The fan housing 420 includes a first fan housing 421 and a second fan housing 422. The first fan housing 421 and the second fan housing 422 are detachably connected. The motor 410 is fastened to the fan housing 420. The fan housing 421 is provided with a hook 4211, and the hook 4211 extends outwardly from the first fan housing 421. The second fan housing 422 is provided with a buckle 4221 matched with the hook 4211 at a position corresponding to the hook 4211 on the first fan housing 421. The outer surface of the buckle 4221 is provided with an inclined surface to facilitate the installation and removal of the hook 4211.

[0059] Reference Figure 1 , Figures 4 to 10 The end of the main housing connected to the control module 300 is an arc-shaped end 180 extending inward, and a plurality of card plates 140 are arranged inside the arc-shaped end 180. The card plates 140 are U-shaped card plates 140 that are laid down, and both side plates of the U-shaped card plates 140 are provided with U-shaped card slots 141 for engaging the control housing. The U-shaped card slots 141 on the plurality of U-shaped card plates 140 are arranged and combined together to form an engaging channel for engaging the control housing. The plurality of U-shaped card plates 140 are dispersed inside the arc-shaped end 180, which effectively ensures the engaging strength of the engaging channel on the one hand, and effectively saves materials on the other hand. The control shell is a plate-like structure, and includes a snap plate 320 and a control board 310. The control board 310 is located outside the snap plate 320 and forms a step-like structure with the snap plate 320. The thickness of the snap plate 320 is adapted to the U-shaped slot 141. The control shell is provided with a mounting slot 311 for mounting a gear knob 340 and a temperature control knob 330. The gear knob 340 and the temperature control knob 330 are arranged such that the gear knob 340 is connected to the gear shifter 360 for adjusting and controlling the air volume of the heater, and the temperature control knob 330 is connected to the thermostat 350 for adjusting and controlling the temperature of the heater. The control shell is a plate-like design. When installing, the snap plate 320 on the control shell is installed into the snap channel formed by a plurality of slots, and then the first housing 120 and the second housing 130 are plug-in connected. On the one hand, it uses less raw materials and is simple to make. On the other hand, it is easy to install and use.

[0060] Reference Figures 1 to 11The heater with a PTC heating structure of the present invention is mainly composed of an air outlet module 200, a housing module 100, a control module 300 and an air source module 400. Each module is independently designed, with a small number of modules, a simple structure and convenient installation. The two ends of the housing module 100 are detachably connected to the air outlet housing 210 in the air outlet module 200 and the control housing in the control module 300, respectively. The first housing 120 in the housing module 100 is also detachably connected to the first housing 120. The first housing 120, the second housing 130, the air outlet housing 210 and the control housing can be connected by the module. The main housing is made of an integral molding, which greatly simplifies the production of the housing; the main housing is composed of a first housing 120 and a second housing 130 that are plug-in and detachably connected to each other, the main housing is snap-fitted and detachably connected to the control housing, and is plug-in and detachably connected to the air outlet housing 210. When installing, first put the control housing into the card plate 140 in the first housing 120 and the second housing 130 of the main housing, then plug-in and install the first housing 120 and the second housing 130, and finally plug-in and install the air outlet housing 210 at the other end of the main housing to complete the installation; when disassembling, first remove the air outlet housing 210 from the main housing The housing can be disassembled by removing the first housing 120 and then opening the second housing 130. The entire installation and disassembly process is not only simple and convenient, but also does not require screwing, which effectively solves the time-consuming and labor-intensive problem of screwing between various parts in the prior art. Moreover, when one of the housings is damaged, the housing can be directly replaced without discarding the entire housing, which greatly saves the use cost. As described above, when installing the heater with a PTC heating structure of the present invention, first put the control housing into the first housing 120 and the second housing 130 of the main housing, Then the first housing 120 and the second housing 130 are installed by plugging them together, that is, the control housing is clamped between the first housing 120 and the second housing 130 through the plug-in connection between the first housing 120 and the second housing 130, which effectively ensures the stability of the clamping connection between the control housing and the main housing, and finally the air outlet housing 210 is plug-installed on the other end of the main housing, and the first housing 120 and the second housing 130 are respectively connected through the air outlet housing 210, so that the connection between the first housing 120 and the second housing 130 is stable and not easy to be detached, thereby ensuring the stability of the overall connection of the shell.In the present invention, the air outlet module 200 is provided with a concave groove air duct 220 in the air outlet shell 210, and the side panel assembly 240 of the concave groove air duct 220 is provided to realize the detachable connection between the PTC element 290 and the air outlet shell 210, so that when the PTC element 290 or any component of the air outlet shell 210 in the air outlet module 200 is damaged, only the damaged component needs to be replaced without replacing the entire component, thereby greatly reducing the use cost; the groove bottom of the concave groove air duct 220 and the side panel assembly 240 are provided, the concave groove air duct 220 is an integral structure, and the side panel assembly 240 is provided with a stopping structure 242, so that the PTC element 290 is stably connected to the air outlet shell 210 and is not easy to loosen, thereby effectively ensuring the air outlet effect.

[0061] The above embodiments are only specific embodiments of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these obvious replacement forms all belong to the protection scope of the present invention.

Claims

1. A heater with a PTC heating structure, characterized in that : It is composed of an air outlet module, a housing module, a control module and an air source module. The air outlet module, the housing module, the control module and the air source module adopt a modular design. Each module is independently arranged. The air source module is fixedly installed on the air outlet module. The two opposite opening ends of the housing module are detachably connected with the air outlet module and the control module respectively. The air outlet module includes an air outlet shell that is plug-in and detachably connected to the housing module, a concave slot air duct is provided in the middle of the inner side of the air outlet shell, the concave slot air duct is an integral structure, a plurality of air source installation columns for installing the air source module are provided on the outside of the concave slot air duct, the bottom of the concave slot air duct is an air outlet grille, a PTC element is detachably installed in the concave slot air duct, the concave slot air duct is surrounded by a side plate assembly for connecting the PTC element, and the side plate assembly is provided with a slot for engaging the PTC element and a stop structure for stopping the PTC element; The housing module is a main housing, the main housing includes a first housing and a second housing, the first housing and the second housing are plug-in detachable connection; The control module includes a control shell, which is detachably connected to the housing module in a snap-fitting manner, and the inner sides of the ends of the first housing and the second housing connected to the control shell are each provided with a plurality of card plates for snapping the control shell, and the first housing and the second housing are plug-connected to snap the control shell onto the card plates.

2. The heater with a PTC heating structure according to claim 1, characterized in that The first housing is provided with a first plug-in column, and the second housing is provided with a first plug-in slot matching with the first plug-in column. The first housing and the second housing are plug-connected to each other through the first plug-in column and the first plug-in slot.

3. The heater with a PTC heating structure according to claim 2, characterized in that The outer side of the air outlet shell extends out in a circle and is inserted into the air outlet side wall of the main shell. The air outlet side wall is provided with a plurality of buckle protrusions extending inwardly. One end of the main shell connected to the air outlet shell is provided with an L-shaped notch for abutting the air outlet side wall. The bottom of the L-shaped notch is provided with a plurality of air outlet fasteners extending inwardly. The end of the air outlet fastener is provided with an air outlet buckle portion for abutting the buckle protrusion.

4. The heater with a PTC heating structure according to claim 3, characterized in that An upper plug-in slot is provided at the top of one end where the main housing is connected to the air outlet housing, a lower plug-in slot is provided at the bottom of one end where the main housing is connected to the air outlet housing, an upper plug-in block for inserting into the upper plug-in slot and a lower plug-in block for inserting into the lower plug-in slot are provided at the top and bottom of one side where the air outlet housing is plugged into the main housing, respectively, and a gap is left between the upper plug-in block and the lower plug-in block and the air outlet side arm.

5. The heater with a PTC heating structure according to claim 4, characterized in that :The side panel assembly includes an upper side panel, a lower side panel and two long side panels relatively distributed on both sides of the PTC element. The lower side panel is provided with a plurality of slots for plugging in the PTC element. The inner side of the long side panel is provided with a stopping structure for stopping the PTC element. The stopping structure is a connecting plate. A connecting buckle is provided at the end of the connecting plate. The connecting plate is made of elastic material.

6. The heater with a PTC heating structure according to claim 5, characterized in that : A heat dissipation channel is reserved between the PTC element and the side plate of the concave slot air duct and the air outlet grille at the bottom; a plurality of abutting portions for abutting the PTC element are distributed on the side plate of the concave slot air duct, and the abutting portions form a first heat dissipation channel between the PTC element and the side plate of the concave slot air duct; a plurality of support plates for supporting the PTC element are distributed on the inner side of the air outlet grille at the bottom of the concave slot air duct, and the support plates form a second heat dissipation channel between the PTC element and the air outlet grille at the bottom of the concave slot air duct.

7. The heater with a PTC heating structure according to claim 6, characterized in that : A temperature limiting notch is also provided on the two long side panels of the concave slot air duct, and a temperature limiting mounting column is provided on the outer side of the temperature limiting notch. A temperature limiting protector is installed on the temperature limiting mounting column. The sensing point of the temperature limiting protector is located at the temperature limiting notch. The temperature limiting protector is installed on the temperature limiting mounting column through a temperature limiting frame. The temperature limiting mounting column is a hollow mounting column, and the temperature limiting frame is installed on the temperature limiting mounting column through fasteners.

8. The heater with a PTC heating structure according to claim 7, characterized in that : The air outlet housing is also provided with a plurality of wind source mounting columns for installing the wind source module, the wind source module is installed on the wind source mounting columns of the air outlet housing through fasteners, the wind source module includes a motor, a fan housing and a wind wheel, the fan housing includes a first fan housing and a second fan housing, the first fan housing and the second fan housing are detachably connected, the motor is installed on the first fan housing through fasteners, the wind wheel is installed on the driving shaft of the motor, the first fan housing is provided with a hanging buckle, and a buckle block matching the hanging buckle is provided at a position on the second fan housing corresponding to the hanging buckle on the first fan housing, and the outer surface of the buckle block is set as an inclined surface.

9. The air heater with a PTC heating structure according to any one of claims 1 to 8, characterized in that The end of the main housing connected to the control module is an arc-shaped end extending inward, and a plurality of card plates are arranged inside the arc-shaped end. The card plates are U-shaped card plates that are laid down, and both side plates of the U-shaped card plates are provided with U-shaped card slots for engaging the control housing.

10. The heater with a PTC heating structure according to claim 9, characterized in that The control shell is a plate-like structure, comprising a snap-fit ​​plate and a control plate. The control plate is located on the outside of the snap-fit ​​plate and forms a step-like structure with the snap-fit ​​plate. The thickness of the snap-fit ​​plate is adapted to the U-shaped slot. A gear knob and a temperature control knob are installed on the control shell.

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