JP2000304416A - Tubular heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tubular heater which improves workability by removing a lead wire from a horizontal direction and is used as a defrosting heater for a refrigerator to perform waterproofing through constitution favorable in terms of a cost without using a waterproofing member formed of a different member. SOLUTION: This tubular heater comprises a pipe body 10 having two end openings, a heater 11 situated internally of the pipe body, a lead wire 12 through which a power source is connected to the heater 11, and a terminal cap part 14 mounted in a covering state on the two ends of the pipe body 10 and linearly leading out the lead wire 12 from a side to an external part. An air flow passage 16 having one communicated with the opening of the pipe body 10 approximately in parallel to a hole 17 for the lead wire 12 and the other bent downward and being opened is formed in the terminal cap part 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular heater used as a defrost heater of a refrigerator, and more particularly, to a lead member which can be taken out from a lateral direction to improve workability and separate members. The present invention relates to a structure that can be waterproofed by a cost-effective structure without using a waterproof member made of water.

[0002]

2. Description of the Related Art A conventional tubular heater used as a defrost heater of a refrigerator or the like is, for example, a tubular body 10 having two open ends, such as a tubular heater 8 shown in FIGS. Ten
And a terminal cap portion 14 for covering the both ends of the tubular body 10 and taking out the lead wire 12 downward. The terminal cap portion 14 has an insertion opening 15 into which the opening end of the tubular body 10 is inserted, and an oval ventilation passage 16 communicating with the insertion opening 15 and opening downward to drain water and air. And a circular hollow hole 17 provided with a rib 19 for taking out the lead wire 12 to the outside downward.The lower end of the ventilation path 16 has air permeability and intrudes from the outside. An annular frame portion 21 provided with a lid 22 made of a waterproof member for preventing water from being attached is configured to be attached to the rib 18, thereby ventilating through the ventilation path 16 of the terminal cap portion 14, In addition, the thermal expansion or heat of the air inside the tube is In addition to being able to perform a breathing action with the outside in response to shrinkage, the waterproof member prevents water from entering from the outside, so that the heater can be waterproofed, and the risk of insulation deterioration is reduced.

However, since the lead wire 12 is taken out from below the terminal cap portion 14, there is a problem that workability is poor as compared with the case where the lead wire 12 is taken out from the side. In addition, since the annular frame 21 provided with the lid 22 made of the waterproof member made of a separate member is attached to the rib 18 of the terminal cap 14, the cost is disadvantageous. .

[0004]

SUMMARY OF THE INVENTION In view of the above problems, in the present invention, the workability is improved by allowing the lead wires to be drawn out from the lateral direction, and the cost is reduced without using a separate waterproof member. It is an object of the present invention to provide a tubular heater used as a defrost heater or the like of a refrigerator which can be waterproofed by a configuration advantageous to the above.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a tube having openings at both ends, a heater provided in the tube, and a lead wire for connecting the heater to a power source. A terminal cap portion covering the both ends of the tubular body and linearly taking out the lead wire from a side portion to the outside, the terminal cap portion having one end for the lead wire at an opening of the tubular body. The air passage is formed so as to communicate with the hole substantially in parallel, and the other is bent downward and opened.

[0006] Further, a tapered portion in which the lower end of the opening is expanded is continuously formed in the downwardly bent air passage.

Further, a drain portion is formed continuously in the corner of the bent portion of the air passage so as to protrude into the air passage and prevent water from entering.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below as examples based on the attached drawings. 1 to 3
As shown by 1, 1 is a refrigerator having a freezer compartment 2, a refrigerator compartment 3 and a vegetable compartment 4, 5 is an evaporator provided on the back side of the freezer compartment 2, an evaporating pipe 6 meandering and having an evaporator 7, and 8 is a dew A tubular heater for defrosting, which is disposed below the evaporator 5 in order to prevent sticking, is a temperature fuse 9 which is provided alongside the evaporator 5.

Here, the tubular heater 8 for defrosting will be described in detail with reference to FIG. 2 and FIG.

[0010] The tubular heater 8 is a tubular body having both ends opened.
10, a heater 11 provided in the tube 10, a lead wire 12 for connecting the heater 11 to a power source, and a lead 12 covering the both ends of the tube 10 and passing the lead 12 from the side to the outside. A terminal cap portion 14 having an insertion opening 15 into which the opening end of the tube body 10 is inserted for linear extraction, and the terminal cap portion
14, one of the holes for the lead wire 12 is provided in the opening of the tube body 10.
The air passage 16 communicates substantially in parallel with the opening 17 and the other is bent downward to open, so that the lead wire 12 can be taken out from the lateral direction to improve workability. In addition, the tubular heater 8 used as a defrost heater or the like of a refrigerator that can be waterproofed with a cost-effective configuration without using a separate waterproof member as in the above-described conventional technology is provided. .

Further, as shown in FIG. 3, a tapered portion 16b which is formed by expanding the lower end of the opening portion of the terminal cap portion 14 is continuously formed in the air passage 16 bent downward, thereby forming the lower end portion of the opening portion. So that water does not enter the pipe 10 from the
The configuration is such that it can be more effectively prevented.

Further, as shown in FIG. 3, a draining portion 16a which protrudes into the air passage 16 and prevents water from entering is formed continuously at the bent corner of the air passage 16 as shown in FIG.
The structure is such that water can be more effectively prevented from entering the tube 10 from the lower end of the opening.

With the above construction, as shown in FIGS. 1 to 3, the tubular heater 8 comprises a tube 10 having both ends opened,
A heater 11 provided in the tube 10, a lead wire 12 for connecting the heater 11 to a power source, and a lead 12 covering the both ends of the tube 10 and linearly extending the lead 12 from the side to the outside. A terminal cap portion 14 having an insertion opening 15 into which an open end of the tube body 10 is inserted for removal.
One of the holes is provided in the opening of the tube 10 with a hole 17 for the lead wire 12.
And the other is bent downward to form an air passage 16 which is opened downward, so that the lead wire 12 can be taken out from the lateral direction to improve workability and to improve the workability. A tubular heater 8 used as a defrost heater or the like of a refrigerator which can be waterproofed by a cost-effective structure without using a separate waterproof member as in the technology.

[0014]

As described above, according to the present invention, the workability can be improved by allowing the lead wires to be taken out from the lateral direction, and a cost-effective configuration can be achieved without using a separate waterproof member. This is a tubular heater used as a defrost heater of a refrigerator that can be waterproofed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a refrigerator using a tubular heater according to the present invention.

FIG. 2 is an explanatory view of a main part of a refrigerator using the tubular heater according to the present invention.

FIG. 3 is an explanatory view of a main part of a tubular heater according to the present invention.

FIG. 4 is an explanatory view of a main part of a refrigerator using a conventional tubular heater.

FIG. 5 is an explanatory view of a main part of a conventional tubular heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Freezer room 3 Refrigerator room 4 Vegetable room 5 Evaporator 6 Evaporation pipe 7 Evaporin 8 Tubular heater 9 Temperature fuse 10 Tubular body 11 Heater 12 Lead wire 14 Terminal cap part 15 Insertion opening 16 Vent path 16a Drain part 16b Taper part 17 Lead wire Hole for

Claims (3)

[Claims] 1. A tube having both ends opened, a heater provided in the tube, a lead wire connecting the heater to a power source,
A terminal cap portion covering the both ends of the tubular body and linearly taking out the lead wire from a side portion to the outside, the terminal cap portion having one end for the lead wire at an opening of the tubular body. A tubular heater characterized by forming an air passage communicating substantially parallel to the hole and opening the other by bending downward. 2. The tubular heater according to claim 1, wherein a tapered portion having a lower end of the opening is continuously formed in the downwardly bent air passage. 3. The air drainage section according to claim 1, wherein a drain section is formed continuously at the bent corner of the ventilation path so as to protrude into the ventilation path and prevent water from entering. Tubular heater.