Improved mosquito-repellent incense spiral winding-shaped electric shock preventing device structure and manufacture method thereof

Abstract

The invention discloses an improved mosquito-repellent incense spiral winding-shaped electric shock preventing device structure and a manufacture method thereof. The device structure is formed by welding an upper end cover 1, a lower end cover 2 and a middle spacing ring 3. A welding seam comprises a planar straight line-shaped welding seam at the middle end surface and a cylindrical surface welding seam at the outermost periphery. The invention has the advantages of good leakage preventing performance, convenient processing, and the like.

Description

1. Technical field [0001] The invention discloses an improved mosquito-repellent incense and a spiral-coiled anti-shock device structure and a manufacturing method, belonging to the technical field of household appliances. 2. Background technology [0002] Existing domestic hot water systems usually have several forms such as electric heating, gas heating, heat pump heating, and solar heating with auxiliary electric devices. Generally, commercial power is used as heating energy or driving energy. According to the electricity safety regulations, the system must be reliably grounded. There is no current in the ground wire during normal use. In case of leakage, the current flows into the ground through the low-resistance ground wire, which forms equal protection for people to ensure human safety. [0003] However, in fact, a large part of the existing houses are not properly grounded when they are built. In addition, due to irregular design and production of some sockets, or ...

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Problems solved by technology

[0005] Yet the weak point of above-mentioned solution is that because water flow resistance can't be too big, and pipe can't be too thin, and to reach larger resistance value, pipe is just very long, and dish is bulky in the lower part, both unsightly and waste material, and can cause The connection rigidity is too poor, easy to damage

[0007] 1. Each device has two welds, more welds will increase the possibility of leakage failure

[0008] 2. Limited by the radial dimension, the radial dimension of the outermost weld seam of the anti-shock device cannot be very wide. Under the long-term alternating water pressure and temperature of the water heater, it will crack due to the outermost weld seam within a few years. and fail

[0009] 3. When the three parts to be welded are welded, they must form a "five-sandwich" state with the two heating plates: that is, five layers must be stacked together, and the spacer in the middle is limited by the position of the two heating plates and their own size, so positioning is very difficult , so it is difficult to weld with ordinary plastic welding machines on the market, resulting in low processing efficiency, high cost, and high price. At present, it is only used in the range of high-end water heaters, and it is difficult to fully popularize and adopt it in the field of wading electrical appliances.

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