JPH0536791U - Heater for pipe insulation - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the workability of attaching the heater for heat insulation to the pipe and improve the heat transfer efficiency. [Structure] A resistance element 14 having lead-out lead wires 12 at both ends is housed in a case 11 made of a resin molded product integrally provided with a mounting portion 11a to a pipe 4, and an insulating material 13 is filled from above. ..

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a freeze prevention heater which is attached to a pipe of a water heater or the like to keep it warm to prevent the liquid accumulated inside from freezing.

[0002]

[Prior Art]

 As a conventional heater of this type, as shown in FIG. 3, a resistor element having lead-out lead wires 2 made of a covered electric wire at both ends is housed in a box-shaped ceramic case 1 having an opening on one side. It is known that an insulating material 3 such as an inorganic insulating material is filled and solidified from above. Then, the chevron-shaped recess 1a formed on the mounting surface of the ceramic case 1 is brought into contact with the outer peripheral surface of the pipe 4, and is fixed by a mounting bracket 5 prepared separately.

[0003]

[Problems to be solved by the device]

 However, in the case of such a conventional structure, when attaching to the pipe 4, first, the attaching metal fitting 5 is temporarily assembled to the heater, and then, as shown in FIG. The work efficiency was poor and it took a lot of time to work.

Further, since the chevron-shaped recess 1a formed in the ceramic case 1 is brought into contact with the outer peripheral surface of the pipe 4, the contact portion between the case and the pipe is a line contact of two lines in a strict sense. The efficiency was low, and about 80% was released to the outside air, which was extremely inefficient.

The present invention is intended to solve such a problem, and an object of the present invention is to provide a heater for pipe warming, which has good workability in mounting the heater to the pipe and has high heat transfer efficiency. .

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention stores a resistance element with a lead wire in a case made of a resin molded product integrally provided with a mounting mechanism for a pipe, It is a structure that is filled with an insulating material.

[0007]

[Action]

 According to the above configuration, since the mounting part of the case made of the resin molded product to the pipe can be elastically opened and closed, the mounting part can be mounted only by pressing it strongly against the pipe surface, which improves workability. . Further, the contact portion between the case and the pipe can be in surface contact, and the heat transfer efficiency is improved.

[0008]

【Example】

 Hereinafter, embodiments will be described in detail with reference to the drawings. FIG. 1 shows a heater 10 for heat insulation of a pipe according to an embodiment of the present invention. 11 is a case made of a resin molded product integrally provided with a mounting portion 11a for the pipe 4, and 12 is a resistance element 14 It is a lead wire provided at both ends of and is made of heat-resistant coated electric wire. Reference numeral 13 denotes an insulating material, such as an inorganic insulating material, which is filled from above after housing the resistance element 14 in the case 11.

The mounting portion 11 a of the case has a cross section formed in an arc shape of about ⅔ of the circumference of the pipe 4, and the tip portion is notched. Since the mounting portion 11a is thin and made of resin, the notch at the tip can be elastically opened and closed.

When the pipe warming heater 10 configured as described above is attached to the pipe 4, the taper portion provided at the tip of the notch of the mounting portion 11 a of the case is applied to the pipe 4 and the heater 10 is strongly pressed. , The notch is opened to introduce the pipe 4 into the inside, and with the notch being closed, the pipe is pressed against the pipe with moderate pressure.

Since such a mounting method is adopted for the heater 10 for heat insulation of the pipe of the present embodiment, the mounting work is extremely simple, and the number of working steps is reduced by about 50% as compared with the conventional one. In addition, as shown in Table 1, the contact area between the case 11 and the pipe 4 is wider, the power consumption is smaller than the conventional product, and the heat transfer efficiency is improved by 33%. FIG. 2 shows load electric power for obtaining the required temperature rise in comparison between the present embodiment and the conventional example.

[0012]

[Table 1]

[0013]

[Effect of the device]

 As described above, according to the present invention, (1) the workability of attaching the heater for pipe insulation to the pipe is improved, and the number of steps is significantly reduced. (2) The contact area between the case and the pipe is increased, and the heat transfer efficiency is greatly improved. (3) The effect that the mounting member as a separate member is eliminated, the number of parts is reduced, and the cost is reduced, etc.

[Brief description of drawings]

FIG. 1 is a perspective view of a pipe heat insulating heater according to an embodiment of the present invention.

FIG. 2 is a diagram showing load power for obtaining a required temperature rise in the example and the conventional example.

FIG. 3 is a perspective view of a conventional example.

FIG. 4 is a view showing a state where the pipe is attached to the conventional example.

[Explanation of symbols]

4 ... Pipe, 11 ... Case, 11a ... Mounting part, 12
… Lead wire, 13… Insulation, 14… Resistive element.

Claims (1)

[Scope of utility model registration request] 1. A heater for attaching to a pipe of a water heater or the like to keep heat and prevent freezing, wherein a resistance element with a lead wire is attached to a case made of a resin molded product integrally provided with an attaching mechanism to the pipe. A heater for keeping a pipe warm, which is housed and filled with an insulating material.