Waterproof structure of temperature limiting device for water heater

Abstract

The utility model provides a waterproof structure of a temperature limiting device for a water heater, which comprises a temperature sensing cap and a shell, the temperature sensing cap is fixed at the upper end of the shell and encloses a first cavity with the shell, a bimetallic strip contacted with the temperature sensing cap is arranged in the first cavity, a first sealing ring is arranged between the temperature sensing cap and the shell, and a second sealing ring is arranged between the temperature sensing cap and the shell. A reset rod, a first conducting strip and a second conducting strip are arranged in the shell, the first conducting strip and the second conducting strip are both provided with wiring ends extending out of the shell, the reset rod is vertically arranged, the top end of the reset rod abuts against the bimetallic strip, and the reset rod is provided with a third conducting strip used for connecting the first conducting strip and the second conducting strip. The reset rod is sleeved with a spring which abuts against the shell and is used for keeping the third conducting strip to make contact with the first conducting strip and the second conducting strip, a waterproof cap is arranged outside the bottom of the shell, and the bottom end of the reset rod extends into the waterproof cap. By adopting the structure, the overall waterproof performance of the temperature limiting device is improved, so that the temperature limiting device still has higher waterproof performance in a high-temperature and high-humidity environment.

Description

Technical Field

[0001] The utility model relates to the field of temperature limiters, in particular to a waterproof structure of a temperature limiter for a water heater. Background Art

[0002] Water heaters are typically equipped with a temperature limiter to ensure the operating temperature does not exceed a set safety threshold. If the water heater temperature rises above the set temperature due to a malfunction or other reason, the temperature limiter shuts off the power supply, ensuring the safety of the user's life and property. However, current temperature limiters on the market lack waterproofing performance and are prone to malfunction or internal metal corrosion in high-temperature and high-humidity environments, rendering them ineffective.

[0003] Therefore, it is necessary to make further improvements. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a waterproof structure of a temperature limiting device for a water heater. The temperature limiting device adopting the waterproof structure has good waterproof performance.

[0005] The utility model proposes a waterproof structure of a temperature limiting device for a water heater, which includes a temperature sensing cap and a shell. The temperature sensing cap is fixed to the upper end of the shell and forms a first cavity with the shell. A bimetallic strip in contact with the temperature sensing cap is provided in the first cavity. A first sealing ring is provided between the temperature sensing cap and the shell. A reset rod, a first conductive sheet and a second conductive sheet are provided in the shell. The first conductive sheet and the second conductive sheet both have terminal terminals extending out of the shell. The reset rod is vertically arranged and the top end abuts the bimetallic strip. A third conductive sheet for connecting the first conductive sheet and the second conductive sheet is provided on the reset rod. A spring is sleeved on the reset rod to abut against the shell and to keep the third conductive sheet in contact with the first conductive sheet and the second conductive sheet. A waterproof cap is provided on the outside of the bottom of the shell, and the bottom end of the reset rod extends into the interior of the waterproof cap.

[0006] In one or more embodiments, a concave step is provided on the periphery of the top of the shell, a first sealing ring is provided on the concave step, and the temperature sensing cap presses the first sealing ring.

[0007] In one or more embodiments, a pressure plate is provided at the bottom of the shell, and a top of the waterproof cap has an annular pressure edge. The pressure plate presses the annular pressure edge, and the pressure plate is fixed to the shell by screws.

[0008] In one or more embodiments, the housing includes an upper shell and a lower shell, the upper shell and the lower shell are fixed together by screws, and a second sealing ring is provided at the connection position between the upper shell and the lower shell.

[0009] In one or more embodiments, the first conductive sheet and the second conductive sheet are provided with raised conductive contacts, which are used to contact and conduct electricity with the third conductive sheet.

[0010] In one or more embodiments, a wiring hole is provided on each of the wiring terminals.

[0011] The beneficial effects of the present invention are as follows: the temperature limiting device improves the overall waterproof performance of the temperature limiting device by arranging a first sealing ring between the temperature sensing cap and the shell, and arranging a waterproof cap at the exposed part of the reset rod, so that the temperature limiting device can still have high waterproof performance in a high temperature and high humidity environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a cross-sectional view of a temperature limiting device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0014] Please see attached Figure 1 The utility model provides a waterproof structure of a temperature limiting device for a water heater, which includes a temperature sensing cap 1 and a shell. The temperature sensing cap is fixed to the upper end of the shell and forms a first cavity 2 in the shell. A bimetallic strip 3 in contact with the temperature sensing cap 1 is provided in the first cavity. A first sealing ring 4 is provided between the temperature sensing cap and the shell. The first sealing ring can strengthen the sealing performance of the connection between the temperature sensing cap and the shell to prevent water or water vapor from entering from the connection between the two. A reset rod 5, a first conductive sheet 6 and a second conductive sheet 7 are provided in the shell. The first conductive sheet and the second conductive sheet both have a connection extending out of the shell. The wire ends are provided with wiring holes 16 for the convenience of wiring. The reset rod 5 is vertically arranged and the top end is in contact with the bimetallic strip 3. The reset rod is provided with a third conductive piece 8 for connecting the first conductive piece 6 and the second conductive piece 7. The reset rod is provided with a spring 9 that is in contact with the shell and is used to keep the third conductive piece in contact with the first conductive piece and the second conductive piece. A waterproof cap 10 is provided on the outside of the bottom of the shell. The bottom end of the reset rod 5 extends into the inside of the waterproof cap. The waterproof cap can improve the waterproofness of the connection between the reset rod and the shell to prevent water or water vapor from entering the inside.

[0015] The outer periphery of the top of the shell is provided with a concave step, and the first sealing ring 4 is provided on the concave step. The temperature sensing cap 1 presses the first sealing ring. The first sealing ring can be a rubber sealing ring or a silicone sealing ring. Through the pressure of the temperature sensing cap, the first sealing ring undergoes slight elastic deformation to enhance the sealing performance.

[0016] A pressure plate 11 is provided at the bottom of the shell, and an annular pressure edge 101 is provided at the top of the waterproof cap 10. The pressure plate presses the annular pressure edge and is fixed to the shell by screws. By tightening the screws, the annular pressure edge is compressed to enhance the sealing.

[0017] The shell includes an upper shell 12 and a lower shell 13, and the upper shell and the lower shell are fixed together by screws. The use of screws for fixing has the advantage of being easy to assemble and disassemble. A second sealing ring 14 is provided at the connection position between the upper shell and the lower shell, and the second sealing ring can strengthen the sealing of the connection between the upper shell and the lower shell.

[0018] The first conductive sheet 6 and the second conductive sheet 7 are provided with raised conductive contacts 15, which are used to contact and conduct electricity with the third conductive sheet. Providing the conductive contacts can better contact and conduct electricity with the third conductive sheet.

[0019] The above description is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the content disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A waterproof structure of a temperature limiting device for a water heater, characterized by: The invention comprises a temperature sensing cap (1) and a shell, wherein the temperature sensing cap is fixed to the upper end of the shell and forms a first cavity (2) in the shell, wherein a bimetallic strip (3) in contact with the temperature sensing cap (1) is provided in the first cavity, wherein a first sealing ring (4) is provided between the temperature sensing cap and the shell, wherein a reset rod (5), a first conductive strip (6) and a second conductive strip (7) are provided in the shell, wherein the first conductive strip and the second conductive strip both have a terminal extending out of the shell, wherein the reset rod (5) is vertically arranged and the top end abuts the bimetallic strip (3), wherein a third conductive strip (8) for connecting the first conductive strip (6) and the second conductive strip (7) is provided on the reset rod, wherein a spring (9) is sleeved on the reset rod and abuts the shell and is used to keep the third conductive strip in contact with the first conductive strip and the second conductive strip, wherein a waterproof cap (10) is provided on the outside of the bottom of the shell, wherein the bottom end of the reset rod (5) extends into the interior of the waterproof cap.

2. The waterproof structure of a temperature limiting device for a water heater according to claim 1, characterized in that: A concave step is provided on the periphery of the top of the shell, a first sealing ring (4) is provided on the concave step, and the temperature sensing cap (1) presses the first sealing ring.

3. The waterproof structure of a temperature limiting device for a water heater according to claim 1, characterized in that: The bottom of the shell is provided with a pressing plate (11), the top of the waterproof cap (10) is provided with an annular pressing edge (101), the pressing plate presses the annular pressing edge, and the pressing plate is fixed to the shell by screws.

4. The waterproof structure of a temperature limiting device for a water heater according to claim 1, characterized in that: The housing comprises an upper shell (12) and a lower shell (13), the upper shell and the lower shell are fixed together by screws, and a second sealing ring (14) is provided at the connection position between the upper shell and the lower shell.

5. The waterproof structure of a temperature limiting device for a water heater according to claim 1, characterized in that: The first conductive sheet (6) and the second conductive sheet (7) are provided with raised conductive contacts (15), which are used for contacting and conducting electricity with the third conductive sheet.

6. The waterproof structure of a temperature limiting device for a water heater according to claim 1, characterized in that: The wiring terminals are each provided with a wiring hole (16).

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