JPH0331680A - Defrosting device of evaporator for refrigerating device - Google Patents

Abstract

PURPOSE:To permit the utilization of radiation heat, radiated linearly, for the defrosting of an evaporator for a refrigerating device by a method wherein a heater protecting cover, arranged between the evaporator for the refrigerating device and a radiation heater, is formed so as to be a net type cover having heat resistant property. CONSTITUTION:A radiation heater 9 generates radiation heat 10 and heat 11 transferred by convection by the heat generation of an electric heating wire 12. The radiation heat 10 and the convection heat 11, generated by the heater 9, pass through the mesh of a heater protecting cover 17 and defrost an evaporator 16 for refrigerating device arranged above the protecting cover. In this case, the heater protecting cover 17 protects a glass tube 13, equipped on the radiation heater 9, from breakage due to the direct impact of frost, dropped from the evaporator 16 for the refrigerating device. On the other hand, water, generated by defrosting, is dispersed by the impact of dropping on the heater protecting cover 17, formed so as to have the shape of net, whereby the water will never impact the glass tube 13 directly thereby preventing the sound of evaporation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a defrosting device for an evaporator for refrigeration equipment such as refrigerators and freezers.

Conventional technology A conventional defrosting device for an evaporator for a refrigeration system is designed to prevent damage due to radiant heat and dripping of defrost water when frost falls from the evaporator for a refrigeration system placed above a radiant heat heater. In order to prevent evaporation noise on the surface of the radiant heat heater, a heater protection cover is placed between the refrigeration equipment evaporator and the radiant heat heater to prevent frost and defrost water from directly hitting the radiant heat heater.

An example of the above-mentioned conventional defrosting device for an evaporator for a refrigeration system will be described with reference to FIGS. 4 and 5.

4 and 5 show a conventional defrosting device for an evaporator for a refrigeration system, with FIG. 4 being a perspective view of the main part, and FIG. 6 being a side view of the main part.

1 is from a glass tube 6 that holds and insulates a heating wire 4 made of iron chrome or the like that generates radiant heat 2 and convection heat transfer 3; and an electrical insulating cap 7 that holds and fixes a lead wire 6 that conducts electricity to the heating wire 4. It is a radiant heat heater. Reference numeral 8 denotes a plate-shaped heater protection cover that protects the radiant heat heater 1 disposed below from direct hit of frost and defrosting water falling from the evaporator for the refrigeration system.

The defrosting device for the evaporator for refrigeration equipment configured as above is as follows:
The radiant heat heater 1 generates radiant heat 2 and convective heat transfer 3 by the heat generated by the heating wire 4, and defrosts the frost on the evaporator for the refrigeration system located above with the heater protection cover 8 in between by convective heat transfer 3. do. Here, the plate-shaped heater protection cover 8 prevents the defrosted frost and defrosting water from falling and directly hitting the glass tube 5 provided in the radiant heat heater 1, thereby preventing damage and evaporation noise.

Problems to be Solved by the Invention However, in the above configuration, the plate-shaped heater protection cover 8
radiant heat 2 linearly radiated from the radiant heat heater 1 and convection heat transfer 3, the radiant heat 2 is blocked and the convection heat transfer 3
The evaporator for the refrigeration equipment is defrosted using only the radiant heat 2.
was not used.

The present invention solves the above conventional problems and provides a defrosting device for an evaporator for a refrigeration system in which radiant heat 2 radiated in a straight line can also be used for defrosting the evaporator for a refrigeration system. It is something to do.

Means for Solving the Problems In order to achieve the above object, the defrosting device for an evaporator for a refrigeration equipment of the present invention has a heater protection cover disposed between an evaporator for a refrigeration equipment and a radiant heat heater with heat resistance. It is formed into a net shape.

Operation According to the above configuration, the radiant heat linearly radiated from the radiant heat heater can be passed through the mesh of the heater protection cover.

Example An embodiment of the present invention will be described using FIGS. 1 to 3.

Reference numeral 9 denotes an electrically insulating cap 16 that holds and fixes a glass tube 13 that holds and insulates a heating wire 12 made of iron chrome or the like that generates radiant heat 1o and convection heat transfer 11, and a lead wire 14 that conducts electricity to the heating wire 12. It is a radiant heat heater. 16
is an evaporator for a refrigeration system disposed above the radiant heat heater 9. Reference numeral 17 denotes a heat-resistant, mesh-shaped heater protection cover disposed between the radiant heat heater 9 and the refrigeration equipment evaporator 16.

The operation of the defrosting device for an evaporator for a refrigerator configured as described above will be described below.

First, the radiant heat and -ta 9 are radiant heat 1 due to the heat generated by the heating wire 12.
o and convective heat transfer 11 are generated. The generated radiant heat 10 and convection electric heat 11 pass through the mesh of the heater protection cover 17 formed into a heat-resistant mesh shape, and defrost the evaporator 16 for the refrigeration system disposed above. At this time, the heater protection cover 17 protects the glass tube 13 provided in the radiant heat heater 9 from being directly hit and damaged by frost falling from the evaporator 16 for the freezing device. In addition, the defrosting water drops directly onto the glass tube 13 and the falling defrosting water scatters due to the impact of falling onto the heater protection cover 17 formed in a net shape, causing the glass tube 13 to fall. Prevents evaporation sound without direct impact.

As described above, according to this embodiment, the heater protection cover 17
By forming it into a heat-resistant net shape, the radiant heat 10 and convection heat transfer 11 generated by the radiant heat heater 9 can be passed through the mesh of the heater protection cover 17 and directly transmitted to the refrigeration device evaporator 16. .

Effects of the Invention As described above, the present invention has an excellent defrosting efficiency in which the radiant heat and convection heat of the radiant heater can be transferred to the evaporator for the indirect refrigeration system by forming the heater protective cover in a mesh shape. It is possible to realize a defrosting device for an evaporator for a refrigerator.

[Brief explanation of drawings]

FIG. 1 is a front view of a defrosting device for an evaporator for a refrigerator according to an embodiment of the present invention, and FIG. 2 is a perspective view of essential parts of the defrosting device of FIG. 1.
Figure 3 is a side view of the main parts showing the heat transfer of the defrosting device in Figure 1;
FIG. 4 is a perspective view of a main part of a conventional defrosting device, and FIG. 5 is a side view of a main part of the defrosting device shown in FIG. 4, showing heat transfer. 9...Radiant heat heater, 10...Radiant heat, 11...Convection heat transfer, 12...Heating wire, 13...Glass Tube, 14...Lead wire, 15...Electrical insulation cap, 16...
...Evaporator for refrigeration equipment, 17... Heater protection cover

Claims (1)

[Claims] A radiant heat heater for defrosting is arranged at the lower end of an evaporator for a refrigeration device, and a heater protection cover is arranged between the evaporator and the radiant heat heater, and the heater protection cover has heat resistance. A defrosting device for an evaporator for a refrigeration device, characterized in that it is formed into a net shape.