Multi-gear power warmer

Abstract

The utility model relates to the field of heaters, in particular to a heater with multi-gear power, which comprises a casing, a PTC (Positive Temperature Coefficient) heating plate, a knob and a power control component, the PTC heating plate is arranged in the casing, a rotating shaft is fixedly connected in the knob, the rotating shaft is rotatably arranged at the bottom of the casing, and the power control component is arranged in the casing. The power control assembly comprises a gear, a rack and a slide rheostat, a guide sleeve is fixed in the machine shell, the lower end of the rack is arranged in the guide sleeve in a sliding mode, the gear is fixed to the rotating shaft and connected with the upper end of the rack in a meshed mode, the slide rheostat comprises a metal sliding sheet, and the right end of the rack is connected with the metal sliding sheet through a connecting rod. The rack drives the metal slip sheet to move, a left binding post of the slide rheostat is connected with the power supply module, and a right binding post of the slide rheostat is connected with the PTC heating plate through a wire, so that stepless adjustment of the power of the PTC heating plate is achieved, a user can easily change the power of the heater by rotating the knob, operation is easy and convenient, and flexible adjustment can be achieved according to actual requirements.

Description

Technical Field

[0001] This utility model relates to the field of heaters, and specifically to a heater with multiple power levels. Background Technology

[0002] In the field of heaters, traditional heater power adjustment methods have certain limitations. On the one hand, their power adjustment usually only has a fixed level function, making it difficult to accurately meet the diverse heating needs of users under different ambient temperatures and usage scenarios. On the other hand, traditional heaters mostly achieve power adjustment through circuit control (such as switches, rheostats, PWM, etc.), combinations of heating elements (series and parallel), and temperature feedback control (thermostats, sensors). Under this adjustment method, frequent operation of circuit control components is prone to wear and tear, heating elements operate under complex circuit connections for a long time and are subjected to large current surges, and the sensitivity of temperature control components to temperature changes also decreases over long-term use, resulting in poor overall durability. This not only affects the lifespan of the heater but may also increase maintenance costs and safety hazards, causing many inconveniences for users. Utility Model Content

[0003] This invention provides a heater with multiple power levels to address the problems of existing technologies.

[0004] The objective of this utility model can be achieved through the following technical solution: A heater with multiple power levels includes: a housing, a PTC heating plate, a knob, and a power control component. The PTC heating plate is disposed inside the housing. A rotating shaft is fixedly connected inside the knob. The rotating shaft is rotatably disposed at the bottom of the housing. The power control component includes a gear, a rack, and a sliding rheostat. A guide sleeve is fixed inside the housing. The lower end of the rack is slidably disposed inside the guide sleeve. The gear is fixed on the rotating shaft and meshes with the upper end of the rack. The sliding rheostat includes a metal slider. The right end of the rack is connected to the metal slider through a connecting rod. The rack drives the metal slider to move. The left terminal of the sliding rheostat is connected to a power supply module, and the right terminal is connected to the PTC heating plate through a wire.

[0005] In a further improvement, a left limiting piece is bolted to the left side of the guide sleeve, and a right limiting piece is provided inside the housing. The left end face of the right limiting piece contacts the end face of the connecting rod when the metal slide is at its rightmost position.

[0006] As a further improvement, the lower end of the guide sleeve is provided with a fixing plate, which is fixedly connected to the machine housing by screws.

[0007] Further improvement, the sliding rheostat further includes insulating base, metal rod and porcelain cylinder, the metal rod and porcelain cylinder are arranged on the insulating base, resistance wire is arranged on the porcelain cylinder, the insulating base is fixedly connected in the shell by screw, the metal sliding sheet is slidably arranged on the metal rod and the lower end contacts the resistance wire on the porcelain cylinder, the length of the resistance wire is changed by the sliding of the metal sliding sheet, the left terminal stud is connected with the left end of the resistance wire, and the right terminal stud is connected with the right end of the metal rod.

[0008] Further improvement, the shell is externally provided with an air outlet cover opposite to the PTC heating plate, and the shell is internally provided with a fan wheel assembly.

[0009] Compared with the prior art, the multi-grade power heater has the following beneficial effects:

[0010] By rotating the knob, the rotating shaft fixedly connected with the knob is driven to rotate, and the gear on the rotating shaft rotates. Since the gear is engaged with the rack, the rack is driven to slide up and down in the guide sleeve. The right end of the rack is connected to the metal sliding sheet of the sliding rheostat through the connecting rod. When the rack moves, the metal sliding sheet is driven to move on the sliding rheostat, thereby changing the resistance value of the sliding rheostat connected to the circuit. Finally, the power of the PTC heating plate is infinitely adjusted. The user can easily change the power of the heater by rotating the knob. The operation is simple and convenient. The power can be flexibly adjusted according to actual needs to meet the heating needs in different scenes. The mechanical structure is relatively more stable, reducing the risk of damage due to frequent operation of electrical components, and improving the durability of the adjustment mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is a structural schematic diagram of the utility model

[0012] Fig. 2 It is a structural schematic diagram of the utility model

[0013] Fig. 3 It is a structural schematic diagram of the power control assembly in the utility model

[0014] In the figure, 1 is a shell, 11 is a guide sleeve, 111 is a fixed plate, 2 is a PTC heating plate, 3 is a knob, 31 is a rotating shaft, 4 is a power control assembly, 41 is a gear, 42 is a rack, 43 is a sliding rheostat, 431 is a metal sliding sheet, 432 is a left terminal stud, 433 is a right terminal stud, 434 is an insulating base, 435 is a metal rod, 436 is a porcelain cylinder, 44 is a connecting rod, 51 is a left limiting piece, 52 is a right limiting piece, 6 is an air outlet cover, and 7 is a fan wheel assembly. DETAILED DESCRIPTION

[0015] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; unless otherwise expressly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, they can refer to fixed connections or detachable connections, etc. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0016] The following is a description of the embodiments and appendices. Figs. 1-3 The technical solution of this utility model will be further described below.

[0017] Example 1

[0018] A multi-power heater includes: a housing 1, a PTC heating plate 2, a knob 3, and a power control component 4. The PTC heating plate 2 is disposed inside the housing 1. A rotating shaft 31 is fixedly connected inside the knob 3 and is rotatably disposed at the bottom of the housing 1. The power control component 4 includes a gear 41, a rack 42, and a sliding rheostat 43. A guide sleeve 11 is fixed inside the housing 1. The lower end of the rack 42 is slidably disposed inside the guide sleeve 11. The gear 41 is fixed on the rotating shaft 31 and meshes with the upper end of the rack 42. The sliding rheostat 43 includes a metal slider 431. The right end of the rack 42 is connected to the metal slider 431 through a connecting rod 44. The rack 42 drives the metal slider 431 to move. The left terminal 432 of the sliding rheostat 43 is connected to a power supply module, and the right terminal 433 is connected to the PTC heating plate 2 through a wire.

[0019] like Figs. 1-3 As shown, the working principle of this utility model is as follows: By rotating the knob, the shaft fixedly connected to it rotates, and the gear on the shaft rotates accordingly. Since the gear meshes with the rack, it causes the rack to slide up and down within the guide sleeve. The right end of the rack is connected to the metal slider of the sliding rheostat via a connecting rod. When the rack moves, it causes the metal slider to move on the sliding rheostat, thereby changing the resistance value of the sliding rheostat connected to the circuit. Ultimately, this achieves stepless adjustment of the PTC heating plate power. Users can easily change the heater power by rotating the knob. The operation is simple and can be flexibly adjusted according to actual needs to meet the heating needs of different scenarios. Furthermore, the mechanical structure is relatively more stable, reducing the risk of damage due to frequent operation of electrical components and improving the durability of the adjustment mechanism.

[0020] As a further preferred embodiment, the left side of the guide sleeve 11 is connected with a left limiting sheet 51 by bolts, and the inside of the casing 1 is provided with a right limiting sheet 52, the left end surface of which contacts the end surface of the connecting rod 44 when the rightmost position of the metal sliding sheet 431. The left limiting sheet is fixed on the left side of the guide sleeve by bolts, and the right limiting sheet is arranged in the inside of the casing. When the rack drives the metal sliding sheet to move, the right limiting sheet can limit the metal sliding sheet to move to the rightmost position, preventing the metal sliding sheet from being damaged by excessive movement; and the left limiting sheet can prevent the rack from moving to the left excessively, protecting the whole power control assembly.

[0021] As a further preferred embodiment, the lower end of the guide sleeve 11 is provided with a fixed plate 111, which is fixedly connected in the inside of the casing 1 by screws. The fixed plate is arranged at the lower end of the guide sleeve and is tightly fixed in the inside of the casing by screws, providing stable support for the guide sleeve and ensuring that the rack can stably slide in the guide sleeve without displacement due to vibration and other factors.

[0022] As a further preferred embodiment, the sliding rheostat 43 further comprises an insulating base 434, a metal rod 435 and a porcelain cylinder 436, the metal rod 435 and the porcelain cylinder 436 are arranged on the insulating base 434, a resistance wire is wound on the porcelain cylinder 436, the insulating base 434 is fixedly connected in the inside of the casing 1 by screws, the metal sliding sheet 431 is slidably arranged on the metal rod 435 and contacts the resistance wire on the porcelain cylinder 436 at the lower end, the length of the resistance wire connected is changed by the sliding of the metal sliding sheet 431, the left terminal post 432 is connected with the left end of the resistance wire, and the right terminal post 433 is connected with the right end of the metal rod 435. The sliding rheostat is composed of an insulating base, a metal rod, a porcelain cylinder and a resistance wire wound on the porcelain cylinder. The insulating base is fixed in the inside of the casing by screws, the metal sliding sheet slides on the metal rod and contacts the resistance wire on the porcelain cylinder at the lower end. When the metal sliding sheet moves, the length of the resistance wire connected in the circuit is changed, thereby changing the resistance value of the sliding rheostat. The left terminal post is connected with the left end of the resistance wire, the right terminal post is connected with the right end of the metal rod, the current flows in through the left terminal post, passes through the resistance wire and the metal rod, and flows out from the right terminal post to the PTC heating plate.

[0023] As a further preferred embodiment, the outside of the casing 1 is provided with an air outlet cover 6 opposite to the PTC heating plate 2, and the inside of the casing 1 is provided with a fan wheel assembly 7, which sucks air from the back of the casing 1 and sends it to the PTC heating plate 2 for heating. The fan wheel assembly is arranged in the inside of the casing, sucks cold air from the back of the casing, and blows out the heated air through the air outlet cover outside the casing opposite to the PTC heating plate, forming a hot air circulation.

[0024] After actual simulation test, the rotating knob is set to 10 gear adjustment, can realize the output power in 500W-2000W range stepless adjustment effect. The specific parameters are as follows: gear tooth number z=40, select the modulus m=1 standard gear, the parameter setting makes the gear in the rotating process, can realize the accurate, stable meshing transmission with rack;Rack length L=120mm, also adopt modulus m=1, ensure the compatibility with gear, guarantee the stability and positioning accuracy of rack when sliding in the guide sleeve. The porcelain cylinder diameter D=50mm that winding resistance wire, resistance wire selects two sections of iron chromium aluminum alloy (0Cr25Al5) material, it has good high temperature resistance, oxidation resistance and suitable resistivity. Single resistance wire cross-sectional area S=1mm 2 , the winding number of each section is controlled at about 230 turns. It is verified by practice that the parameter combination can effectively meet the requirements of the warmer in different power levels for stable operation, and realize accurate power regulation.

[0025] The above describes the preferred embodiments of the present application. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A multi-stage power heater, characterized by, Include: The shell, PTC heating plate, knob and power control assembly, the PTC heating plate is arranged in the shell, the knob inside fixedly connected with the rotating shaft, the rotating shaft rotationally arranged in the bottom of the shell, the power control assembly includes gear, rack and slide rheostat, the shell is fixedly provided with a guide sleeve, the lower end of the rack is slidably arranged in the guide sleeve, the gear is fixed on the rotating shaft and is in meshing connection with the upper end of the rack, the slide rheostat includes a metal slide, the right end of the rack is connected with the metal slide through a connecting rod, the metal slide is moved by the rack, the left terminal post of the slide rheostat is connected with the power supply module, and the right terminal post of the slide rheostat is connected with the PTC heating plate through the lead.

2. A multi-stage power heater as claimed in claim 1, wherein, The left side of the guide sleeve is connected with a left limiting piece through a bolt, the inside of the shell is provided with a right limiting piece, and the left end surface of the right limiting piece contacts the end surface of the connecting rod when the rightmost position of the metal slide.

3. The multi-stage power heater according to claim 1, wherein The lower end of the guide sleeve is provided with a fixed plate, and the fixed plate is fixedly connected with the shell through screws.

4. The multi-stage power heater according to claim 1, wherein The slide rheostat further includes an insulating base, a metal rod and a porcelain cylinder, the metal rod and the porcelain cylinder are arranged on the insulating base, the porcelain cylinder is wound with a resistance wire, the insulating base is fixedly connected with the shell through screws, the metal slide is slidably arranged on the metal rod and the lower end contacts the resistance wire on the porcelain cylinder, the length of the resistance wire is changed by the sliding of the metal slide, the left terminal post is connected with the left end of the resistance wire, and the right terminal post is connected with the right end of the metal rod.

5. The multi-stage power heater according to claim 1, wherein The shell is provided with an air outlet cover opposite to the PTC heating plate, the shell is provided with a fan wheel assembly, and the fan wheel assembly sends air to the PTC heating plate for heating after sucking air from the back of the shell.

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