JPH045960Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention mainly relates to a device for preventing water pipes of instantaneous water heaters from freezing.

(Prior art) Conventionally, as shown in Fig. 5, a heating element b and a water pipe c are held between a mounting bracket a formed of a spring material, and the heating element b is attached to the water pipe c to heat it. A device for preventing the water pipe from freezing is known, for example, from Japanese Utility Model Publication No. 69751/1983. In this case, it is necessary to prevent the heating element b from coming off in the axial direction of the metal fitting a.

(Problem to be solved by the invention) Therefore, as shown in Fig. 5, this device has bent portions d at both ends of the mounting bracket a to lock both ends of the heating element b, thereby generating heat. The body b is prevented from moving in the direction along the water pipe c.

This not only makes the structure complicated, but also
When attaching the heat generating element to the mounting bracket, the bent portion becomes an obstacle when it is attempted to be assembled from the axial direction.

The object of the present invention is to obtain a device free of such defects.

(Means for Solving the Problems) In order to achieve the above object, the present invention is designed to sandwich a block-shaped heating element and a water pipe with mounting brackets made of spring material, and attach the heating element to the water pipe. In the device that is installed to prevent freezing, the mounting bracket is provided with a transparent window that partially fits into the heating element.

(Function) In this case, by simply fitting a portion of the heating element into the transparent window, the heating element can be attached to the water pipe using the mounting fitting without detaching.

(Example) The drawing shows an example of the present invention.
2 is a water pipe installed in the heat exchanger of the water heater; 2 is a block-shaped heating element that incorporates an electric heater or other heater; 3 is a heating element 2 which is sandwiched between the heating element 2 and the water pipe 1; A clip-shaped fitting made of a spring material is shown for attaching the water pipe 1 to the water pipe 1.

The configuration up to now is not particularly different from what is conventionally known.

The present invention is such that the mounting bracket 3 is provided with a transparent window 4 into which a part of the heating element is fitted,
1 and 2 show an embodiment in which a pentagonal heating element 2 with a chevron-shaped top surface is attached to a water pipe 1 using the mounting bracket 3. In this case, the mounting bracket 3 is It is configured to be bent into a substantially U-shape, and a transparent window 5 is provided in the curved portion 3a, the length of which is equal to or longer than the length of the heating element 2, and which is narrower than its width w.

In this case, as shown in FIG.
A part of the heating element 2 faces inside, thereby causing the heating element 2 to
is fixedly fixed to the mounting bracket 3.

3 and 4 show another embodiment in which a rectangular heating element 2 is attached to the water pipe 1 using the mounting bracket 3. In this embodiment, the mounting bracket 3 is arranged in a U-shape. A first curved portion 3b that curves, and a second curved portion 3 that curves outward from the first curved portion 3b.
c, and the second curved portions 3c, 3
c is a transparent window 4 that is equal to or longer than the length of the heating element 2 and into which only the corners of the heating element 2 fit.
was formed.

In both embodiments, the open end side of the mounting bracket 3 is narrow, and the structure is such that the water pipe 1 is held between the pipes of the heating element 2. The fact that the contact surface with pipe 1 has an arc shape along the outside of pipe 1 is also not particularly different from what is conventionally known.

(Effect) According to the present invention, the mounting bracket is only provided with a transparent window that partially fits into the heating element, and the mounting bracket can be passed through with a part of the heating element facing the transparent window. By simply engaging the water pipe, the heating element can be attached to the water pipe so that it will not come off from the mounting bracket, and compared to conventional bending parts, it has a structure that only requires a transparent window. It is simple, and there is an advantage in that the direction of combination of the heating element and the mounting bracket can be selected.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is a sectional view taken along the - line, Fig. 3 is a perspective view of another embodiment, and Fig. 4 is a sectional view taken along the - line. FIG. 5 is a side view showing a conventional example. 1...Water pipe, 2...Heating element, 3...Mounting bracket, 4...Transparent window.

Claims (1)

[Scope of utility model registration request] In a device in which a block-shaped heating element and a water passage pipe are held between a mounting metal fitting formed of a spring material and the heating element is attached to the water passage pipe to prevent freezing, a part of the heating element is attached to the mounting metal fitting. Freeze prevention device with a transparent window that fits into it.