JP2008133985A - Electric heater for defrosting in freezing chamber or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric heater for defrosting capable of preventing frost from being generated in the periphery of a duct in a chamber inner side of a freezing chamber or the like. <P>SOLUTION: A frame body 4 having a plurality of recessed groves 51 opened in and continuing with a wall face side of the chamber inside is arranged in an outer circumference of a chamber inner side of the duct 3 for communicating an inside and an outside of the freezing chamber or the like, an electric heating wire 7 is fit into each of the recessed groves 51 of the frame body 4 to heat the periphery of the duct 3. The frost is thereby prevented frost from being generated in the periphery of the duct 3 in the chamber inner side of the freezing chamber or the like. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric heater for defrosting in a freezer or the like, and more particularly to an electric heater for defrosting disposed on the outer periphery of a duct such as a freezer.

  In general, in refrigerators, freezers, and the like that store foods and the like, a large temperature difference occurs inside and outside in the state of use. When a door such as a freezer is opened and closed in a state where there is this temperature difference, high-temperature outside air flows into the warehouse all at once, and the inflowing outside air is cooled and becomes negative pressure. Further, when the internal temperature rises due to adjustment or inspection of the cooling temperature with the door closed, a positive pressure is applied to the internal chamber.

  The above phenomenon is not a problem in relatively small freezers for home use, etc., but in the case of very large freezers for business use, it becomes difficult to open and close the door when negative pressure is applied, There was a problem that the door would come off when positive pressure was applied.

In order to solve the above problem, there is known a structure in which an outside air intake is provided in the refrigerator to adjust the pressure in the refrigerator (see, for example, Patent Document 1).
JP 2002-267345 A (claims, paragraph numbers 0014 to 0019, FIG. 1)

  However, in the technique described in Japanese Patent Application Laid-Open No. 2002-267345, a dew pan is provided to prevent dew from entering into the cabinet from the inflow port with respect to dew condensation due to the intake of outside air. When the temperature is large and the inside temperature is low, a large amount of frost adheres to the periphery of the duct. Therefore, the effect of trapping condensation by the drain pan cannot be expected, and the inflow port may be blocked by the frost.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the electric heater for defrosts in the freezer etc. which can prevent generation | occurrence | production of the frost to the circumference | surroundings of ducts inside warehouses, such as a freezer.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a defrosting electric heater in a freezer or the like provided on the outer periphery of the inside of a duct that communicates the inside and the outside of a freezer or the like for storing food or the like. A frame having a plurality of concave grooves that are open and continuous on the wall surface side in the cabinet, and a heating wire that is fitted into the concave grooves.

  According to the first aspect of the present invention, a frame having a plurality of concave grooves that are open and continuous on the wall surface side in the warehouse is arranged on the outer periphery of the duct inside the warehouse, and the heating wire is placed in the concave grooves of the frame. By inserting the, the surroundings of the duct can be warmed.

  Further, the invention according to claim 2 is the defrosting electric heater in the freezer or the like according to claim 1, wherein the frame is formed by joining a plurality of extruded shapes, and the extruded shapes are adjacent to each other. Is formed, and the extruded shape members are connected to each other via a connecting member that is fitted and fixed in the locking groove. In this case, the locking groove has a narrow opening, and the connecting member has a fixing piece fitted into the locking groove of the adjacent extruded shape member, and a fixing screw can be screwed to the fixing piece. In the state where the fixing piece is fitted in the locking groove, the tip of the fixing screw screwed into the screw hole is pressed against the bottom of the locking groove to engage the fixing piece. It is preferable to press and fix the narrow opening of the stop groove (claim 3).

  By comprising in this way, a extrusion can be connected and a frame can be formed by inserting and fixing a connection member in the locking groove of a plurality of extrusion profiles. In this case, a narrow opening is provided in the locking groove, and the connecting member is formed with a fixing piece fitted into the locking groove of the adjacent extruded profile, and a fixing screw is screwed onto the fixing piece. By providing a possible screw hole, the tip of the fixing screw screwed into the screw hole is pressed against the bottom of the locking groove while the fixing piece of the connecting member is fitted in the locking groove. Can be pressed and fixed to the narrow opening of the locking groove.

  The invention described in claim 4 is the defrosting electric heater in the freezer or the like according to any one of claims 1 to 3, wherein the frame body is connected to the outside of the frame body in the inner and outer directions of the plurality of grooves. The first heating wire guiding cutout is provided, and the second heating wire guiding cutout is provided at a portion facing in the inner and outer directions of the adjacent concave grooves.

  With this configuration, the heating wire passes through the guide notch of the first heating wire that communicates with the outside of the frame, and is inserted into the recessed groove of the frame, so that the first and second heating wires are provided. The heating wire can be uniformly wired over the entire area of the frame body by being inserted into the adjacent concave groove through the guide notch.

  According to this invention, since it is configured as described above, the following excellent effects can be obtained.

  (1) According to the invention described in claim 1, a frame having a plurality of concave grooves that are open and continuous on the wall surface side in the warehouse is arranged on the outer periphery of the duct inside the warehouse, Since the periphery of the duct can be warmed by inserting the heating wire into the frost, the generation of frost around the duct can be prevented. Moreover, by providing the electric heater for defrosting around the duct in a cabinet, installation and replacement | exchange of an electric heater can be performed easily and a freedom degree can be given to a shape.

  (2) According to the invention described in claim 2, the extrusion members can be connected to each other to form a frame by inserting and fixing the connection members in the locking grooves of the plurality of extrusion members. Therefore, in addition to the above (1), it is possible to further facilitate the production of the frame and to reduce the weight of the frame. In this case, a narrow opening is provided in the locking groove, the connecting member is formed by providing a fixing piece fitted into the locking groove of the adjacent extruded shape member, and a fixing screw can be screwed into the fixing piece. By providing the hole, the tip of the fixing screw screwed into the screw hole is pressed against the bottom of the locking groove in a state where the fixing piece is fitted in the locking groove, and the fixing piece is narrowed in the locking groove. Since it can be pressed and fixed to the opening, the extruded profiles can be easily and reliably connected to each other, and it is not necessary to perforate the frame body, and the appearance can be improved. And the position of the screw hole provided in the connecting member can have a degree of freedom (Claim 3).

  (3) According to the invention described in claim 4, the heating wire is inserted into the recessed groove of the frame body through the notch for guiding the first heating wire communicating with the outside of the frame body. In addition to the above (1) and (2), the entire frame body can be further inserted into the adjacent concave groove through the notch for guiding the heating wire and inserted into the adjacent groove. It is possible to warm evenly and reliably prevent the generation of frost around the duct.

  Below, the best form of the electric heater for defrosting in the freezer etc. which concern on this invention is demonstrated in detail based on an accompanying drawing. Here, the case where the defrosting electric heater in the freezer etc. which concern on this invention is applied to the duct for the external air suction in a freezer is demonstrated.

  FIG. 1 is a schematic perspective view showing an attachment state of a defrosting electric heater in a freezer or the like according to the present invention, and FIG. 2 shows a state in which the defrosting electric heater in the freezer or the like according to the present invention is attached around a duct. FIG. 3 is a rear view showing the back of the defrosting electric heater in the freezer or the like according to the present invention.

  As shown in FIGS. 1 and 2, the defrosting electric heater 1 is provided on the outer periphery of the inside of a duct 3 for sucking outside air that communicates the inside and the outside of the freezer 2 in a freezer 2 that stores food and the like. It is mainly comprised by the frame 4 which has the some concave groove 51 which is provided and opens to the wall surface side in a store | warehouse | chamber, and the heating wire 7 inserted in the concave groove 51.

  As shown in FIG. 2, the duct 3 includes a duct main body 30 that is attached to an attachment hole 20 that communicates the inside and the outside of the freezer 2 and a cover 31 that is attached to the outside of the duct main body 30. And a relief valve 32 provided inside the duct body 30 and connected to the duct body 30 so as to be openable and closable. In this case, the relief valve 32 can be sucked into the freezer 2 by rotating and opening to the inside of the refrigerator according to the pressure in the freezer 2.

  As shown in FIGS. 3 and 5, the frame body 4 is formed by connecting a plurality of (in this case, four) extruded shapes 50 in a frame shape via a connecting member 60. It is attached to the side wall around the duct 3 in the freezer 2 (see FIGS. 1 and 2).

  As shown in FIGS. 3 to 5, the extruded shape member 50 is made of, for example, an aluminum alloy, and has a plurality of (in this case, three rows) concave grooves 51 that are open and continuous on the wall surface in the warehouse. In the state in which the extruded shape members 50 are connected, a narrow opening-shaped locking groove 52 is formed in which the adjacent portions communicate with each other. Further, the extruded shape member 50 is formed in a substantially trapezoidal shape in which both ends are inclined by 45 ° in order to connect the extruded shape members 50 at right angles.

  As shown in FIG. 3, the frame body 4 communicates with the outside of the frame body 4 in the inner and outer directions of the plurality of grooves 51 in the vicinity of the end of the extruded shape member 50 that forms one side of the frame body 4. A first heating wire guiding notch 53 is provided, and at the end of the extruded profile 50 on the side adjacent to the first heating wire guiding notch 53, in the inner and outer directions of the adjacent groove 51. A second notch 54 for guiding the heating wire is provided at the opposite portion.

  As shown in FIGS. 3 and 5, the connecting member 60 is formed of a substantially L-shaped plate material having two fixed pieces 61 fitted into the locking grooves 52 of the adjacent extruded shape members 50. The fixing piece 61 is formed with a screw hole 62 into which a fixing screw 63 can be screwed.

  By forming the frame body 4 in this way, the fixing piece 61 of the connecting member 60 is fitted into the locking groove 52 of the extruded shape member 50, the fixing screw 63 is screwed into the screw hole 62, and the fixing screw 63. The fixing piece 61 can be pressed and fixed to the narrow opening 52 b of the locking groove 52 by pressing the front end portion 63 a against the bottom 52 a of the locking groove 52. Therefore, the extruded body 50 can be connected to each other without forming a hole or the like, so that the frame body 4 can be formed. In this case, as shown in FIG. 3, the connecting member 60 is provided on the outer side and the inner side in the connecting portion between the extruded shape members 50.

  On the other hand, as shown in FIG. 3, the heating wire 7 is inserted into the outer concave groove 51 from the outside of the frame body 4 through the first heating wire guide cutout 53, and the frame body 4 is moved to the timepiece. When it makes a full turn, it is turned back through the guide cutout 54 of the second heating wire and inserted into the adjacent inward groove 51. Further, when the frame body 4 makes a round in the counterclockwise direction, the frame body 4 is folded back through the guide cutout 53 of the first heating wire and fitted into the adjacent inward concave groove 51, and the frame body 4 is further connected to the clock body 4. When it goes around, it is routed to the outside of the frame 4 through the guide cutout 53 of the first heating wire.

  Note that the positions of the guide cutouts 53 and 54 may be provided at arbitrary positions as long as the function can be exhibited. For example, in the above description, the first heating wire guiding notch 53 is provided on the upper side, but may be provided on the lower side.

  Thus, by inserting the heating wire 7 in the recessed groove 51 of the frame body 4, the heating wire 7 can be wired in the whole area of the frame body 4, and the whole frame body 4 can be heated uniformly.

  According to the defrosting electric heater as described above, the frame 4 having a plurality of concave grooves 51 that are open and continuous on the inner wall surface side of the duct 3 is disposed on the outer periphery of the duct 3 on the inner wall side. Since the periphery of the duct 3 can be warmed by inserting the heating wire 7 therein, the generation of frost around the duct 3 can be prevented. Moreover, the installation and replacement | exchange of the electric heater 1 can be performed easily by providing the electric heater 1 for defrosting around the duct 3 in a warehouse. Further, a narrow opening 52 b is provided in the locking groove 52 of the frame body 4, and the connecting member 60 is formed by providing a fixing piece 61 fitted into the locking groove 52 of the adjacent extruded shape member 50. 61 is provided with a screw hole 62 into which the fixing screw 63 can be screwed, so that the tip 63a of the fixing screw 63 screwed into the screw hole 62 is engaged with the fixing piece 61 fitted in the locking groove 52. Since the fixing piece 61 can be pressed and fixed to the narrow opening 52b of the locking groove 52 by pressing against the bottom 52a of the stop groove 52, the extruded shape members 50 can be connected easily and reliably. Further, it is not necessary to perform drilling or the like on the frame body 4, and the appearance can be improved, and the position of the screw hole provided in the connecting member can be given a degree of freedom. Furthermore, by wiring the heating wire 7 over the entire area of the recessed groove 51 of the frame body 4, the entire frame body 4 can be evenly warmed, so that the generation of frost around the duct 3 can be reliably prevented. be able to.

  In the above description, the case where the shape of the frame body 4 is rectangular has been described. However, the shape of the frame body 4 is not necessarily rectangular. The shape of the frame body 4 can be given a degree of freedom by appropriately changing the shape to a polygonal shape such as a hexagonal shape or an octagonal shape according to usage conditions such as a duct shape. In this case, the shape of the connecting member 60 may be a shape that matches the shape of the frame body 4, that is, a shape having the fixing piece 61 that matches the joining angle of the adjacent extruded shape members 50.

It is a schematic perspective view which shows the attachment state of the electric heater for defrosts in the freezer etc. which concern on this invention. It is sectional drawing which shows the state which attached the electric heater for defrosts in the freezer etc. which concern on this invention to the circumference | surroundings of a duct. It is a rear view which shows the back surface of the electric heater for defrosts in the freezer etc. which concern on this invention. It is an expanded sectional view which follows the II line | wire in FIG. It is a disassembled perspective view which shows the connection structure of the frame in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating device for defrosting 3 Duct 4 Frame 7 Heating wire 50 Extrusion shaped material 51 Concave groove 52 Locking groove 52a Bottom part 52b Narrow opening part 53 Notch 54 for the 1st heating wire guide of 2nd heating wire Notch 60 connecting member 61 fixing piece 62 screw hole 63 fixing screw 63a tip

Claims (4)

A defrosting electric heater in a freezer or the like provided on the outer periphery of the inside of a duct that communicates the inside and the outside of a freezer or the like for storing food,
A frame having a plurality of concave grooves that are open and continuous on the wall surface in the chamber;
An electric heater for defrosting in a freezer or the like, characterized by comprising a heating wire inserted into the concave groove. In the electric heater for defrosting in the freezer of Claim 1,
The frame is formed by joining a plurality of extruded shapes,
The extruded profile is formed with a locking groove that communicates with each other,
An electric heater for defrosting in a freezer or the like, characterized in that the extruded profiles are connected to each other via a connecting member that is fitted and fixed in the locking groove. In the electric heater for defrosting in the freezer of Claim 2,
The locking groove has a narrow opening,
The connecting member has a fixing piece that is fitted into a locking groove of an adjacent extruded profile, and is provided with a screw hole into which a fixing screw can be screwed.
With the fixing piece inserted into the locking groove, the tip of the fixing screw screwed into the screw hole is pressed against the bottom of the locking groove, and the fixing piece is pressed against the narrow opening of the locking groove. An electric heater for defrosting in a freezer or the like characterized by being fixed. In the electric heater for defrosting in the freezer etc. in any one of Claims 1 thru | or 3,
The frame body is provided with notches for guiding the first heating wire communicating with the outside of the frame body in the inner and outer directions of the plurality of concave grooves, and the second heating wire is provided at a portion facing the inner and outer directions of the adjacent concave grooves. An electric heater for defrosting in a freezer or the like, characterized in that a notch for guiding is provided.

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