JPH0416152Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a forced convection type defrosting device for refrigerators such as freezers and refrigerators.

[Conventional technology]

As a defrosting device for conventional refrigerators,
Techniques disclosed in Publication No. 130268 and Japanese Utility Model Application Publication No. 59-4977 can be mentioned.

From Fig. 6 to Fig. 9, for example,
A conventional cooler defrosting device disclosed in Japanese Patent No. 4977 will be described. In Figures 6 and 7, 1 is a freezer body with an inner box 2 provided inside, 3 is a freezer door,
4 is a heat insulating material. Reference numeral 5 designates a heat exchange chamber provided on the back side of a freezer compartment 6 formed within the inner box 2 and partitioned by a partition wall 7, and reference numeral 8 designates a cooler installed within the heat exchange chamber 5. Reference numeral 9 denotes a cool air circulation fan provided in the upper part of the heat exchange chamber 5, and is driven by an electric motor 10.
6 to 9, 11 is a defrosting glass tube heater installed in the heat exchange chamber 5 below the cooler 8, and 12 is a protection device installed between the cooler 8 and the glass tube heater 11. It's a cover. 13 is a dew pan provided at the bottom of the heat exchange chamber 5 below the glass tube heater 11, and 14 is a drain pipe connecting the dew pan 13 and the evaporation pan 15 provided outside the freezer compartment 6. It consists of the main parts of the frosting device. Also, 1
6 is a compressor, and 17 and 18 are cold air inlets and outlets provided at the lower and upper parts of the partition wall 7.

In the freezer configured as described above, during cooling, cold air warmed in the freezer compartment 6 is sucked into the heat exchange chamber 5 from the suction port 17 by driving the cold air circulation fan 9 and cooled by the cooler 8. The cold air is then circulated by forced convection that blows out the cold air from the air outlet 18 into the freezer compartment 6. Furthermore, during defrosting, by operating the defrosting glass tube heater 11, the heat generated from the glass tube heater 11 melts the frost adhering to the cooler 8 and turns it into water droplets. Some of the water droplets from the melted frost fall directly onto the dew pan 13 from the cooler 8 and are stored there, while others fall onto the protective cover 12 and are then stored in the dew pan 13. Furthermore, due to the temperature difference between the heat exchange chamber 5 and the freezing chamber 6, dew formation occurs on the inner surface of the circumferential wall of the heat exchange chamber 5, and when a large amount of dew forms, it becomes water droplets, which run down the inner surface of the circumferential wall and fall into the dew pan. It is housed in 13. The drain water contained in the drain tray 13 is led to the evaporation tray 15 through the drain pipe 14 and is evaporated by the heat of the compressor 16. When the water droplets falling from the cooler 8 hit the glass tube heater 11, which is at high temperature during defrosting, the protective cover 12 makes a noise and evaporates.
Water droplets are prevented from hitting the cooler 8.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional cooler defrosting device, the protective cover 12 blocks the heat of the glass tube heater 11 during defrosting, taking time to defrost, and also impairs the flow of cold air during cooling, reducing cooling efficiency. There was a problem with lowering it.

The purpose of this invention is to provide a defrosting device for a cooler that can shorten the defrosting time and improve cooling efficiency by solving the problems of the conventional devices described above.

[Means for solving problems]

The defrosting device for a cooler according to this invention has a window hole with a roof in a protective cover disposed between the cooler and a glass tube heater for defrosting.

[Effect]

In this invention, a window hole is provided in the protective cover of the glass tube heater for defrosting, so that during defrosting, the heat of the glass tube heater is transmitted to the cooler through the window hole without bypassing the protective cover. The frost time is shortened, and when cooling, cold air passes through the window holes, making forced circulation smoother, improving cooling efficiency.In addition, since the window holes have a roof, the cooler can be used during defrosting. Water droplets falling from the glass tube heater can be prevented from hitting the glass tube heater, and the original function of the protective cover will not be degraded.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 to 3. In these figures, 12a is a protective cover main body, and this main body 12a is attached to the upper wall 1.
A window hole 12c is formed in the upper wall 12b, and downwardly inclined inclined walls 12d are integrally formed on both sides of the upper wall 12b. 12e is a roof, and this roof 12e
The upper wall 12f that covers the window holes 12c of the protective cover 12a with a space therebetween is the protective cover main body 12.
The upper wall 12f of the roof 12e is integrally formed with downwardly inclined inclined walls 12g on both sides, and the legs 12h protruding downward from both ends of the upper wall 12f of the roof 12e are arranged directly above the protective cover 12a. wall 12b
The support is fixed on the top. The width of the roof 12e is narrower than the width of the protective cover 12a.
Note that the configuration of this embodiment other than the above is the same as that shown in FIGS. 6 to 9, and
The same reference numerals as in FIGS. 6 to 9 in FIGS. 6 to 3 indicate the same or corresponding parts.

In the embodiment configured as described above, during defrosting, the frost adhering to the cooler 8 is melted by the heat generated from the defrosting glass tube heater 11, and falls as water droplets. . The fallen water droplets are received by the roof 12e of the protective cover 12, the inclined wall 12d of the protective cover main body 12a, etc., are stored in the dew pan 13, and are led to the evaporation pan 15 outside the refrigerator through the drain pipe 14. Therefore, the protective cover 12 can prevent water droplets falling from the cooler 8 from hitting the glass tube heater 11. Moreover, since the window hole 12c is formed in the protective cover 12a,
During defrosting, the heat from the glass tube heater 11 is transmitted to the cooler 8 through the window hole 12c, which makes it easier to transmit the heat to the cooler 8, which shortens the defrosting time.
During cooling, the cold air sucked from the suction port 17 is guided to the cooler 8 through the window hole 12c, so that the cold air flows smoothly to the cooler 8, improving cooling efficiency.

4 and 5 show other embodiments of this invention. In this embodiment, the window holes 12c are formed by cutting and raising the sloped portions 12i on both sides of the protective cover 12, which has an inverted V-shaped cross section.
Roofs 12e are respectively formed to cover the tops of 2c, and the slopes of the roofs 12e are formed to be gentler than the slopes of the both side slopes 12i. The configuration of this embodiment other than the above is the same as the embodiment shown in FIGS. 1 to 3, and the same reference numerals as in FIGS. 1 to 3 in FIGS. 4 and 5 are used. indicate the same or equivalent part.

The embodiment shown in FIGS. 4 and 5 provides the same results as the embodiment shown in FIGS. 1 to 3 above, and since the protective cover is a single member, This has the advantage that it can be provided at a lower cost than those shown in FIGS. 1 to 3.

Although the above-mentioned embodiment describes the case of a freezer, this invention can also be applied to forced convection type refrigerators that circulate cold air between the freezer compartment and refrigerator compartment (including those with a low-temperature room or a low-temperature corner). can.

[Effect of idea]

As explained above, according to this invention, the protective cover placed between the cooler and the defrosting glass tube heater is provided with a window hole and a roof covering the window hole, thereby shortening the defrosting time. It can improve cooling efficiency,
Therefore, it helps to reduce power consumption, and by shortening the defrosting time, it suppresses the rise in temperature inside the refrigerator during defrosting.
This has the effect of suppressing the temperature rise of food.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view showing a defrosting device for a cooler according to an embodiment of the invention, Fig. 2 is a longitudinal sectional side view of the main parts, Fig. 3 is an exploded perspective view of the protective cover, and Fig. 4. 5 is a vertical sectional side view of the main parts of a defrosting device for a cooler according to another embodiment of this invention, FIG. 5 is a perspective view of the same protective cover, and FIG. 6 is a defrosting device for a cooler according to a conventional example. FIG. 7 is a front view with the partition wall removed, FIG. 8 is a perspective view of the main part, and FIG. 9 is a longitudinal side view of the main part. 5...Heat exchange room, 6...Freezing room, 7...Partition wall, 8...Cooler, 9...Cold air circulation fan, 1
1... Glass tube heater for defrosting, 12... Protective cover, 12a... Protective cover body, 12c... Window hole, 12e... Roof. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] A heat exchange chamber partitioned by a partition wall on the back of an inner box that keeps the internal temperature low, and a cooler disposed within the heat exchange chamber, and the heat exchange chamber is cooled by the cooler. In a forced convection type refrigerator in which cold air is supplied into the inner box and circulated between the inner box and the heat exchange chamber by a cold air circulation fan, the cooler is disposed below the cooler in the heat exchange chamber. A defrosting glass tube heater is disposed between the cooler and the glass tube heater, and the glass tube heater is disposed to cover the glass tube heater to prevent water droplets falling from the cooler during defrosting from being removed from the glass tube heater. and a protective cover that allows water to flow without dripping into the tube heater, and the protective cover has a window hole that serves as a passage for heat from the glass tube heater to the cooler, and a window hole that allows water droplets that fall from the cooler to flow during defrosting. A defrosting device for a cooler, comprising a roof that covers the window hole to prevent water from flowing through the window hole.