A surface PTC heater with a built-in temperature controller

Abstract

This invention provides a surface PTC heater with a built-in temperature controller, comprising a tube containing multiple sheet-like PTC heating elements. Upper and lower electrode plates are located on the upper and lower planes of the printed electrodes of the PTC heating elements. The outer sides of the upper and lower electrode plates are wrapped with an insulating layer to form a PTC heating core. A temperature controller assembly is located at the head of the PTC heating core, on the side of the PTC heating element A. The temperature controller assembly is connected in series with the PTC heating core and then connected to an external power source. Compared with the prior art, the advantages of this invention are: placing the temperature controller on the side of the PTC heating element saves space, and shortens the cold end length of the surface PTC heater while ensuring the temperature controller is integrated into the tube.

Description

Technical Field

[0001] This invention relates to a heater, particularly a PTC heater for use in household appliances (such as sweepers / floor scrubbers), and more specifically to a surface PTC heater with a built-in thermostat. Background Technology

[0002] PTC (Positive Temperature Coefficient) heaters are widely used in the home appliance industry due to their advantages such as self-regulating temperature, high safety, and energy saving.

[0003] However, with the increasing demand for miniaturization in home appliances, existing PTC heaters face a problem: placing the thermostat outside the tube increases the overall height of the heater and requires more installation space; placing the thermostat at the head of the tube results in an excessively long cold end of the heater, leading to excessively low head temperatures.

[0004] Therefore, there is an urgent need for an improved PTC heater to solve the above problems. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a surface PTC heater with a built-in temperature controller, aiming to shorten the cold end length of products. This utility model provides the following technical solution:

[0006] A surface PTC heater with a built-in temperature controller includes a tube body containing multiple sheet-shaped PTC heating elements. Upper electrode plates and lower electrode plates are provided on the upper and lower planes of the printed electrodes of the PTC heating elements. The outer sides of the upper and lower electrode plates are wrapped with an insulating layer to form a PTC heating core. A temperature controller assembly is provided on the side of the PTC heating element A at the head of the PTC heating core. The temperature controller assembly is connected in series with the PTC heating core and then connected to an external power source.

[0007] Furthermore, the width of PTC heating element A is smaller than that of other PTC heating elements B, so that a temperature controller can be installed on the side.

[0008] Furthermore, in order to match the power requirements of the PTC heating element A, the corresponding head of the upper electrode plate is provided with a protruding structure.

[0009] Furthermore, the aforementioned thermostat assembly includes a thermostat housing and a thermostat. The thermostat housing helps to prevent the thermostat from directly contacting the PTC heating element A, thus preventing excessively high temperatures from adversely affecting the thermostat.

[0010] Furthermore, an outlet is provided at the head position on the upper surface of the tube body so that a sealing ring can be installed around the tube body.

[0011] Furthermore, when the product current exceeds 3 amps, the required temperature controller is relatively large, and the height of the temperature controller housing will be increased accordingly. In order to prevent interference between the temperature controller housing and the tube body, a clearance groove is set on the upper surface of the tube body.

[0012] Furthermore, a fuse is installed at the head of the PTC heating element.

[0013] Furthermore, the tube body is made of aluminum, a metal with good thermal conductivity, and the heat dissipation surface of the tube body is made into an arc shape in order to increase the heat dissipation area.

[0014] Compared with the prior art, the beneficial effects of this utility model are: placing the temperature controller on the side of the PTC heating element saves space, and shortens the cold end length of the surface PTC heater while ensuring the built-in tube of the temperature controller. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the finished product of this utility model.

[0017] Figure 2 This is an exploded view of the parts of this utility model.

[0018] Figure 3 This is a schematic diagram of the temperature control component of this utility model.

[0019] 1—PTC heating element; 101—PTC heating element A; 102—PTC heating element B; 2—Lower electrode plate; 3—Upper electrode plate; 301—Upper electrode plate protruding structure; 4—Insulating layer; 5—Tube body; 501—Relief groove; 502—Wire outlet groove; 6—Temperature control assembly; 601—Temperature control shell; 602—Temperature controller; 7—Fuse; Detailed Implementation

[0020] Exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0021] It should be understood that the terms "inner", "outer", "upper", "lower", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or 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. Therefore, they should not be construed as limitations on this utility model.

[0022] The design will be further explained below with reference to the accompanying drawings in the structural specification.

[0023] like Figures 1-2 A surface PTC heater with a built-in temperature controller includes a tube body 5, inside which are arranged multiple sheet-shaped PTC heating elements 1. An upper electrode sheet 3 and a lower electrode sheet 2 are provided on the upper and lower planes of the printed electrodes of the PTC heating elements 1. The outer sides of the upper electrode sheet 3 and the lower electrode sheet 2 are wrapped with an insulating layer 4 to form a PTC heating core. At the head of the PTC heating core and on the side of the PTC heating element A101, a temperature controller assembly 6 is provided. The temperature controller assembly 6 is connected in series with the PTC heating core and then connected to an external power supply.

[0024] The manufacturing process of the PTC heater core is existing technology and will not be described in detail here.

[0025] like Figure 2 To minimize the cold end of the surface PTC heater, the width of the PTC heating element A101 at the head of the heating core is smaller than that of the other PTC heating elements B102. The sum of the widths of PTC heating elements B102 and the temperature controller assembly 6 should be approximately equal to the width of PTC heating element B102 to facilitate smooth tube insertion. Existing technologies often use PTC heating elements of the same width, with the temperature controller typically placed at the head of the PTC heating core, resulting in an excessively long cold end for the surface PTC heater.

[0026] Furthermore, in order to match the power requirements of the PTC heating element A101, the corresponding head of the upper electrode plate 3 is provided with a protruding structure 301.

[0027] Furthermore, the aforementioned thermostat assembly 6 includes a thermostat housing 601 and a thermostat 602. The thermostat housing 601 helps to prevent the thermostat 602 from directly contacting the PTC heating element A101. When the PTC heating element A101 is working, its surface temperature will be very high. If the thermostat 601 is in direct contact with the PTC heating element A101, the heat will be directly transferred to the thermostat 602 first, causing the thermostat 602 to misjudge and thus disconnect the circuit, or the temperature may be too high, causing the thermostat housing to age faster.

[0028] Furthermore, such as Figure 2To ensure the sealing of the entire PTC heater, an outlet 502 is provided at the head position of the upper surface of the tube body 5 so that a sealing ring can be installed around the tube body.

[0029] Furthermore, such as Figure 2 When the product current exceeds 3 amps, the required temperature controller 602 is relatively large, and the height of the corresponding temperature control housing 601 will be increased accordingly. In order to prevent the temperature control housing 601 from interfering with the tube body 5, a clearance groove 501 is provided on the upper surface of the tube body 5.

[0030] Furthermore, to ensure the reliability of product performance, a fuse 7 is installed at the head of the PTC heating element.

[0031] Furthermore, tube body 5 is made of aluminum, a metal with good thermal conductivity. In order to increase the heat dissipation area, the heat dissipation surface of tube body 5 is made into an arc shape.

[0032] The embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles of the embodiments, their practical application, or improvements to the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A surface PTC heater with built-in temperature controller, comprising a tube body (5), a plurality of sheet-shaped PTC heating elements (1) are arranged in the tube body (5), upper and lower electrode sheets (3) and (2) are arranged on the upper and lower planes of the PTC heating elements (1) where electrodes are printed, the outer sides of the upper and lower electrode sheets (3) and (2) are wrapped by an insulating layer (4) to form a PTC heating core, characterized in that: A temperature controller assembly (6) is provided on the side of the PTC heating element A (101) at the head of the PTC heating core. The temperature controller assembly (6) is connected in series with the PTC heating core and then connected to an external power supply.

2. The surface PTC heater with built-in temperature controller according to claim 1, characterized in that: The width of the PTC heating element A (101) is smaller than that of the PTC heating element B (102).

3. The surface PTC heater with built-in temperature controller according to claim 2, characterized in that: The head of the upper electrode plate (3) is provided with a protruding structure (301) to provide power to the PTC heating element A (101).

4. The surface PTC heater with built-in temperature controller according to claim 3, characterized in that: The thermostat assembly (6) includes a thermostat housing (601) and a thermostat (602).

5. A surface PTC heater with built-in temperature controller according to claim 4, characterized in that: The tube body (5) has a cable outlet (502) at the head position of the upper surface.

6. The surface PTC heater with built-in temperature controller according to claim 5, characterized in that: The upper surface of the tube (5) is provided with a relief groove (501) to prevent the temperature control shell (601) from interfering with the tube (5).

7. A surface PTC heater with built-in temperature controller according to claim 6, characterized in that: A fuse (7) is provided at the head of the PTC heating core.

8. The surface PTC heater with built-in temperature controller according to any one of claims 1 to 7, characterized in that: The tube body (5) is made of aluminum, which has good thermal conductivity. In order to increase the heat dissipation area, the heat dissipation surface of the tube body (5) is made into an arc shape.

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