JPH087340Y2 - Freezing prevention device for freezer, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an improved configuration of a container opening antifreezing device in a prefabricated freezer, a refrigerator, or the like.

(B) Conventional technology In this type of prefabricated freezer, the temperature difference between the inside and the outside of the refrigerator is large, so that the moisture condensed on the packing portion interposed between the door and the refrigerator freezes and the door cannot be opened. Since there was a problem such as the packing coming off, for example, as shown in Japanese Utility Model Publication No. 64-544, a heater wire is arranged on the outer surface of the frame member attached to the opening edge of the housing to heat the frame member. Has prevented such freezing.

Also, if the temperature of the frame material rises too much due to the heating by this heater wire, there is a danger of workers coming in and out of the storage opening coming into contact and getting burned.Therefore, install an overheat prevention thermostat in series with the heater wire. Further, a slotted groove is formed on the outer surface of the frame member so as to have a heat conduction relationship with the heater wire, and the slotted groove is arranged so as to be in contact with the heater wire.

(C) Problems to be solved by the invention With such a configuration, it takes time and labor to form a slotted groove in the frame material, and a heater or a thermostat for preventing overheating is provided in the corner portion of the frame material. Since it exists, the strength of the frame material itself becomes weak. On the other hand, since the trolleys and workers who have loaded the articles are constantly coming and going at the storage opening, these trolleys often collide with the frame material, and in such a case, the frame material is crushed,
There was a problem that the overheat prevention thermostat was damaged.

If the thermostat for overheat prevention is arranged away from the heater in order to solve this, the sensitivity of the thermostat for overheat prevention deteriorates, and there is a problem that the heat generation of the heater cannot be controlled smoothly.

 The present invention aims to solve such problems.

(D) Means for Solving the Problems The present invention provides an electrically insulating cross section mounted so as to cover an opening edge of a storage opening of a storage body such as a freezer and one side surface adjacent to the opening edge. An L-shaped frame member, a heater wire housing portion formed on the outer side surface of the frame material, a recess formed on the inner side surface of the frame material, and a dew condensation preventing heater arranged in the heater wire housing portion, A thermostat for preventing overheating, which is connected in series to the heater and is disposed in the concave portion and is in contact with or close to the heater, constitutes an antifreezing device for an opening of a freezer or the like.

(E) Action According to the present invention, since the thermostat for preventing overheat is in the recess formed on the inner side surface of the frame member, it is protected from a dolly or the like that collides with the frame member. Also, since the heater and the overheat prevention thermostat are in direct contact with each other or are in close proximity to each other, the heat generation of the heater is sensitively grasped, and when the temperature rises, the overheat prevention thermostat quickly energizes the heater. cut off.

(F) Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan sectional view of a storage opening anti-icing device of the present invention, in which 1 is a heat insulating side wall panel that constitutes a storage body such as a prefabricated freezer, and 3 is an electrically insulating hard synthetic resin. It is a frame material having an L-shaped cross section.

As shown in FIG. 3, the frame member 3 is constructed by assembling the upper, lower, left, and right sides into a rectangular shape, and the heater wire housing 4 composed of a plurality of grooves is formed on the outer surface of the corner portion thereof. A groove-like recess 5 is also formed on the inner surface. The recess 5 and the heater wire housing 4 are communicated with each other by a communication passage 19 formed in the frame member 3 (FIG. 3 shows the inner surface of the frame member 3).

As shown in FIG. 1, the frame member 3 has an opening edge 2a of the opening 2 and one side surface 2b outside the opening adjacent to the opening edge 2a of the opening 2 provided in the heat insulation panel 1. The heater wire housing portion 4 is wired with a dew condensation preventing heater 7 at that time, and in that state, the heat is formed into a frame shape as a whole with an L-shaped cross section. It is covered with a cover plate 8 made of a highly conductive metal plate.
The cover plate 8 engages with the groove 9 formed on the outer surface of the frame member 3 at the end located on the front surface side by side with the heater 7, and the end on the opening 2 side is screwed.
It is fixed to the frame member 3 by 10.

Reference numeral 11 is a heat insulating door pivotally supported by a frame member 3 on the side opposite to that shown in FIG. 1 so as to openably close the opening 2.
Is a latch receiver attached to the frame member 3 on the free end side of the door 11. The latch receiver 12 utilizes the recess 5 of the frame member 3 and is fixed to the frame member 3 with screws from the recess 5 side which is the inner side surface.
Further, a latch lock 13 attached to the free end side of the door 11 engages with the latch receiver 12 in a disengageable manner. Furthermore, a magnet gasket 14 is attached to the inner peripheral surface of the door 11,
When 11 is closed, this gasket 14 comes into close contact with the cover plate 8 by magnetic force.

Reference numeral 15 is a thermostat for preventing overheating, which is the above-mentioned recess 5
It is housed therein and is located on the side of the communication passage 19. 16 is a metal fitting for fixing the overheat prevention thermostat 15 to the inner surface of the frame member 3 along the inner surface of the recess 5, and is drawn into the recess 5 from the communication passage 19,
It is also a metal fitting 16 provided in the vicinity of the overheat preventing thermostat 15 for fixing a part of the heater 7.
The metal fitting 16 is attached by a screw 17. Further, the heater 7 may be provided in direct contact with the overheat preventing thermostat 15. Overheat prevention thermostat 15
Is to open the contact when the temperature sensed by the heater rises to a predetermined high temperature, and to prevent excessive heating of the frame member 3 by the heater 7 by being electrically connected in series with the heater 7. . This overheat prevention thermostat 15 and heater 7
Are connected to each other by a lead wire 18 passing through the communication passage 19 and drawn from the heater wire housing portion 4 into the recess 5.

Next, the operation will be described. The dew condensation prevention heater 7 generates heat by operating a switch (not shown), and heats the frame member 3 to a temperature above the dew point temperature through the cover plate 8 to prevent dew condensation on the frame member 3. This heat is transmitted to the overheat prevention thermostat 15 through the metal fitting 16 fixing the heater 7 or by radiant heat, and its temperature rises. Further, when the heater 7 is provided in contact with the overheat prevention thermostat 15, the heat of the heater 7 is directly transmitted and the temperature rises. Due to these effects, overheat prevention thermostat 15
The contact is opened and the electric power to the heater 7 is cut off. However, by setting the temperature of the frame member 3 at this time so that the operator or the like does not get burned, such an accident can be prevented. When the temperature in the concave portion 5 eventually decreases, the contacts of the overheat preventing thermostat 15 are closed again and the energization of the heater 7 is started.

At this time, as shown in FIGS. 1 and 2, the overheat preventing thermostat 15 and the heater 7 are present on the inner side surface of the frame member 3, and the structure of the frame member 3 is formed only by forming the communication passage 6. Since it is simple and the strength does not decrease, the frame member 3 is not easily crushed and the overheat preventing thermostat 15 and the heater 7 are not easily damaged even when a truck or the like collides.

In particular, the heat of the heater 7 is transferred to the overheat prevention thermostat 15 directly or in a state close to it, so that the sensitivity of the overheat prevention thermostat 15 is not impaired, and the heat generation amount of the heater 7 can be controlled smoothly and accurately. You can do it.

(G) Effect of the Invention According to the present invention, the thermostat for overheat prevention is present on the inner surface of the frame material, and since the structure of the frame material does not need to be specially changed, the strength does not decrease, and the trolley and the like collide. Even so, it is possible to prevent the frame material from being crushed and the thermostat for preventing overheating or the heater from being damaged.

In addition, the heat generated by the heater is transmitted directly to the overheat prevention thermostat or in a state close to it, so the sensitivity is good, and smooth and accurate heat generation control of the dew condensation prevention heater can be achieved. It prevents rising and prevents accidents such as burns of workers.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a storage port anti-freezing device, FIG. 2 is an enlarged inner side view of a frame member of a thermostat portion for preventing overheating, and FIG. 3 is an inner side view of the frame member. DESCRIPTION OF SYMBOLS 1 ... Insulation panel, 2 ... Opening part, 3 ... Frame material, 4 ... Heater wire storage part, 5 ... Recessed part, 7 ... Dew condensation prevention heater, 15 ... Overheat prevention thermostat.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Shown 61-18491 (JP, U) Shown 63-110884 (JP, U) Shown 63-43078 (JP, U) Shown 63- 43080 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An electrically insulating frame member having an L-shaped cross section, which is mounted so as to cover an opening edge of an opening for an opening of a freezer or the like and a side surface adjacent to the opening edge, and the frame. A heater wire storage portion formed on the outer surface of the material, a recess formed on the inner surface of the frame material, a dew condensation prevention heater disposed in the heater wire storage portion, and connected in series to the heater. A storage port anti-freezing device in a freezer or the like, which is provided in the recess and is in contact with the heater or a thermostat for preventing overheating which is close to the heater.