JP2555661Y2 - Defrosting tubular heater device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a tubular heater for defrosting used in refrigerators, and more particularly, to adsorbs malodorous components in the refrigerator when the tubular heater for defrosting is not functioning and is not heated. In addition, the present invention relates to an improvement in a device provided with deodorizing means for oxidatively decomposing malodor components adsorbed by the heat when the tubular heater for defrosting exerts a defrosting function.

[0002]

2. Description of the Related Art In a refrigerator, various odor components are generated from various foods. Typical examples of this type of malodorous component include methylcaptan, a component of putrefactive odor of vegetables and fruits, and trimethylamine and trimethyloxane, components of putrefactive odor of meat and fish. And fatty acids and acetic acids, which are odor components of fermented foods and the like. Conventionally, in order to remove this kind of malodorous component, a method and apparatus for deodorizing using activated carbon, ozone and ultraviolet rays have been used.

[0003] For example, as a first conventional example, there is a deodorizer using an ozone generator and a catalyst. That is, an ozone generator and a catalyst are installed in a refrigerator. Ozone generated from the ozone generator is reacted with odor, and the odor is oxidatively decomposed and removed, and excess ozone is decomposed and removed by a catalyst. Also, as a second conventional example, Japanese Patent Publication No. 3-64169.
There is a deodorizing device as shown in Japanese Patent Publication No. That is, a deodorizing body whose surface is covered by a porous member having a high thermal conductivity is arranged in a refrigerator, and a heater for defrosting in which a heater wire is housed in a glass tube is installed near the deodorizing body. . When the heater for defrosting is not functioning, the deodorant adsorbs the malodorous component when the electricity is not supplied. Then, the odor component adsorbed on the deodorizing body at the time of energization at which the defrost heater functions is oxidatively decomposed.

As a third conventional example, Japanese Patent Application Laid-Open No. Hei 2-27
There is a deodorizing device as disclosed in Japanese Patent Application Laid-Open No. 5277 and Japanese Utility Model Application Laid-Open No. 4-4682. This is a configuration in which a tubular deodorizing body containing a platinum group catalyst is covered on the outer periphery of a defrosting heater composed of a heater wire such as a nichrome wire, and the deodorizing heater does not function when the power is turned off. Adsorbs components,
The deodorizing heater functions to oxidize and decompose odor components adsorbed at the time of energization in which the heater functions. Further, as a fourth conventional example, Japanese Patent Laid-Open No.
There is a deodorizing device as disclosed in Japanese Patent Publication No. 275277 or Japanese Utility Model Laid-Open Publication No. 4-4683. First, there is a defrosting heater having a configuration in which a heater wire is accommodated in a glass tube, and a deodorizing layer containing a platinum group catalyst is provided on the outer periphery of the defrosting heater. This is almost the same as the conventional example.

[0005]

According to the above conventional configuration, there are the following problems. First, the first conventional example has a problem that the configuration is complicated and the cost is high. This is because an ozone generator is required as a device, and a catalyst for decomposing excess ozone is required. Next, in the case of the second conventional example, since the defrosting heater and the deodorizing body are installed in a non-contact state, there is an advantage that the heating efficiency of the atmosphere for defrosting is high. However, there is a problem that the efficiency is low when heating the deodorizing body to increase the deodorizing efficiency. Further, in the case of the third conventional example, the deodorizing body is made of porous ceramics for supporting the catalyst, and the deodorizing body is efficiently heated, so that the deodorizing efficiency can be improved. On the other hand, there is a problem that the heating efficiency of the atmosphere for defrosting is low. Further, in the case of the fourth conventional example, since the deodorant is applied and fired in a layer on the surface of the glass tube,
Since the deodorizing body may be peeled off due to the difference in thermal expansion coefficient between the glass tube and the deodorizing material, the deodorizing body cannot be formed thick, and thus the heating efficiency of the atmosphere for defrosting is high, There was a problem that efficiency was low. As described above, there is no one that has a simple configuration and can be realized at low cost, and that satisfies both the defrosting efficiency and the deodorizing efficiency. Another problem is that maintenance and inspection work is difficult, and even if a faulty part occurs, it is difficult to replace only the part. This is particularly true in the third and fourth conventional examples. Since the defrosting heater and the deodorizing layer are integrally formed, it is impossible to replace either one of them. Was.

The present invention has been made based on such a point, and the object thereof is to realize a simple structure at a low cost, satisfy both the defrosting efficiency and the deodorizing efficiency, and It is an object of the present invention to provide a defrosting tubular heater device capable of easily replacing only a failed component.

[0007]

In order to achieve the above object, a defrosting tubular heater device according to the present invention is detachably attached to a tubular heater for defrosting by fitting the outer periphery of the tubular heater for defrosting. A metal radiator comprising: an arc-shaped holding portion; and a pair of radiating portions each extending in a radial direction from both ends of the arc-shaped holding portion; and the metal radiator. And a deodorizing layer comprising a metal oxide carrier fixed on the surface of the metal oxide and a catalyst supported on the metal oxide carrier. At that time, it is conceivable that the deodorizing layer is fixed to both the front and back surfaces of the metal radiator. Further, it is conceivable to attach the deodorizing means to the tubular heater for defrosting by fitting such that the pair of heat radiating portions of the metal heat radiating body are directed upward. or,
It is conceivable to attach a drip-proof cover on the pair of heat radiating parts.

[0008]

First, in the case of the present invention, since the deodorizing means is detachably attached to the defrosting tubular heater by fitting, it is easy to attach and detach the deodorizing means and the defrosting tubular heater. Therefore, even if one of them should fail,
Both can be separated and only the faulty one can be replaced. In addition, the deodorizing means is fitted in close contact with the tubular heater for defrosting, and a metal heat radiator is provided. Further, the metal heat radiator has a pair of heat radiating portions extending in the radial direction. In addition, an opening is formed between the pair of heat radiating sections, and the tubular heater for defrost is exposed, so that heat can be efficiently dissipated and the atmosphere for defrost is heated. High efficiency. In addition, the surface area of the metal radiator is larger than the surface area of the tube of the tubular heater for defrost, and therefore, the deodorizing layer can be provided in a wider area than the surface of the tubular heater for defrosting. Therefore, high deodorization efficiency can be expected. In consideration of the fixing strength of the deodorizing layer to the base, the metal plate is stronger than the tube (for example, a glass tube). Therefore, the operation of providing the deodorizing layer is simple and the cost is low. Further, since the thickness of the deodorizing layer can be increased, it is advantageous from the viewpoint of the above deodorizing efficiency. Further, since concern about peeling of the deodorizing layer due to dropping of water or the like is greatly reduced, a stable function can be exhibited for a long period of time.

When a deodorizing layer is fixed to both the front and back surfaces of the metal radiator, the deodorizing layer can be provided in a wider range, so that the deodorizing efficiency can be further improved. or,
If the deodorizing means is mounted with the pair of heat radiating parts directed upward, the heat from the tubular heater for defrost is efficiently dissipated upward from the opening, and the atmosphere during defrosting is improved. Heating efficiency can be increased. Furthermore, when the drip-proof cover is provided, it is possible to prevent water drops during defrost from directly dropping on the defrosting tubular heater.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a first embodiment of the present invention; FIG.
An embodiment will be described. The tubular heater device for defrost according to the present embodiment has a configuration as shown in FIG. First, there is a tubular heater 1 for defrosting, and the tubular heater 1 for defrosting is configured as shown in FIG. First, there is a glass tube 3 as a tube, and the glass tube 3 has an outer diameter of 10 mm and a length of 300 mm. The glass tube 3 is made of quartz glass, and the tube may be made of various ceramics other than the glass tube. Note that the above dimensions are merely examples. In the glass tube 3, for example,
A coil-shaped heating wire 5 made of iron-chromium-aluminum alloy (Fe-Cr-Al) or iron-chromium alloy (Fe-Cr) or the like is accommodated and arranged.

Lead wires 9 and 9 ′ are connected to both ends of the coil-shaped heating wire 5 via connection terminals 7. Note that only one connection terminal 7 is shown. Caps 11, 1 made of silicone rubber are provided at both ends of the glass tube 3.
1 'is attached, and the connection terminal 7 is fixed to these caps 11, 11'. The lead wires 9 and 9 'are coated with a silicone rubber insulating coating to increase the mechanical strength. Specifically, glass braid, polyvinyl chloride (PVC), polyethylene (PE)
And the like. The power consumption of the defrosting tubular heater 1 having the above configuration is 140 W (AC10
0V). Note that the power consumption varies depending on conditions such as the capacity and space of the refrigerator, the capacity of the cooler, and the like. Usually, the surface temperature of the glass tube 3 is 250 ° C. to 6 ° C.
The value is designed to be 00 ° C.

A deodorizing means 13 is detachably attached to the outer peripheral portion of the glass tube 3 of the tubular heater 1 for defrosting by fitting. As shown in FIG. 3, the deodorizing means 13 includes a metal radiator 15 and a deodorizing layer 17 fixed to both front and back surfaces of the metal radiator 15. The metal radiator 15 includes an arc-shaped holding portion 19 and a pair of heat radiating portions 21 and 21 ′ extending both ends of the arc-shaped holding portion 19 in a radial direction, and is formed of an iron plate having a thickness of 0.35 mm. Have been. The inner diameter of the arc-shaped holding portion 19 is 10 mm,
The opening angle of the opening 22 between the pair of heat radiating portions 21 and 21 ′ (the angle formed by the pair of heat radiating portions 21 and 21 ′) is 120.
°, and the length (L) of the deodorizing means 13 is 260 mm. The width (H) of the pair of heat radiating portions 21 and 21 ′ is 40
mm. Note that each of the above numbers is also an example, and is not limited thereto.

The deodorizing layer 17 is composed of a silica-alumina-based carrier (adsorbent) having a large adsorptive action, and a platinum group catalyst supported on the carrier and oxidizing and decomposing the malodorous component adsorbed. As described, the metal radiator 15
Is fixed on both sides. The deodorizing layer 17 is fixed to the metal radiator 15 in the following procedure. First, after sandblasting the surface of the metal radiator 15, a silica / alumina-based carrier is applied to the surface and baked. Next, the metal radiator 15 is immersed in a platinum chloride solution, and then dried to support the platinum catalyst on the carrier. Through such a procedure, the deodorizing layer 17 is fixed to the front and back surfaces of the metal radiator 15. The configuration of the deodorizing layer 17 is not limited to the above, and for example, a porous ceramic such as zeolite may be used as a carrier, that is, an adsorbent. In addition, other noble metals and rare earth oxides may be used as the catalyst in addition to the platinum group catalyst.

As described above, in the case of the tubular heater for defrosting according to the present embodiment, the deodorizing means 13 is detachably attached to the outer periphery of the glass tube 3 of the tubular heater 1 for defrosting by fitting. It is configured so that it can be easily attached to and detached from the glass tube 3. Deodorizing means 1
The third metal heat radiator 15 includes a pair of heat radiators 21 and 21 ′, and both the front and back surfaces of the metal heat radiator 15 function effectively as deodorizing surfaces. Therefore, for example, the effective area contributing to deodorization is significantly wider, about 5.8 times, than the configuration of the fourth conventional example.

The operation will be described based on the above configuration. First, the tubular heater for defrost according to the present embodiment is installed below a cooler of a refrigerator. And two or three a day
It is energized once or every four to five days. When the defrosting tubular heater 1 is not operated (during non-heating), the deodorizing means 13 adsorbs and removes odor components in the refrigerator. On the other hand, when the defrosting tubular heater 1 is in operation (at the time of heating),
The platinum group catalyst in the deodorizing layer 17 of the deodorizing means 13 functions to oxidize, decompose and regenerate the malodorous component adsorbed by the adsorbent. Such an action is achieved by turning on / off the tubular heater 1 for defrosting.
Turn off and repeat.

When the defrosting tubular heater 1 is in the operating state, the defrosting function is exhibited. The operation at that time will be described in detail. When the defrosting tubular heater 1 is energized, it generates heat, and the heat heats the atmosphere in the refrigerator to exert a defrosting action. At that time, the deodorizing means 13
Metal radiator 15 greatly contributes to dissipating heat into the atmosphere. First, since it is made of metal, it has a high thermal conductivity and heat from the defrosting tubular heater 1 is efficiently transmitted to the outer peripheral side and is radiated into the atmosphere. Also, a pair of heat radiating portions 21 and 21 ′
Is provided, so that heat can be efficiently dissipated into the atmosphere. Further, a portion between the pair of heat radiating portions 21 and 21 ′ is an opening 22,
Since the defrosting tubular heater 1 is in an exposed state, heat is efficiently radiated therefrom into the atmosphere. As described above, since the heating efficiency of the atmosphere during defrosting increases, the defrosting efficiency eventually increases.

Here, the result of comparison between the case of the tubular heater device for defrosting according to the present embodiment and the fourth conventional example described in the description of the conventional example will be described. First, the heating efficiency when the atmosphere was heated during defrosting was compared. That is,
A plastic sealed box having a side of 500 mm is prepared, and a tubular heater for defrosting according to the present embodiment and a tubular heater for defrosting according to the fourth conventional example are installed therein. Then, the degree of temperature rise in each closed box is compared. That is, after energization is started,
The time required for the temperature of the central part near the ceiling of the closed box to rise by 5 ° C. was measured. As a result, in the case of the fourth conventional example, it took about 11 minutes, whereas in the case of the tubular heater device for defrosting according to the present embodiment, it took about 5 minutes. That is, the heating efficiency of the atmosphere during the defrosting is high accordingly.

Next, the deodorizing ability was compared. Prepare 1 g of raw garlic as a odor component and grind it. On the other hand, the tubular heater device for defrost according to the present embodiment and the tubular heater device for defrost according to the fourth conventional example are respectively installed in the closed box, and the garlic crushed is put therein. In this state, a cycle in which the battery was left for 5 hours and energized for 1 hour was repeated 4 cycles. Thereafter, the air in each of the closed boxes was sampled and an odor test was performed. In this odor test, five odor specialists called examiners were on standby to determine whether or not the air collected from each of the closed boxes was odor. As a result, in the case of the fourth conventional example, all of the five examiners determined to be "smell", whereas in the case of the present embodiment, "smell" of the five examiners was determined. Only one was judged. That is, it means that the offensive odor component was effectively adsorbed and removed.

According to the present embodiment, the following effects can be obtained. First, it has a relatively simple structure, can be manufactured at low cost, and has high heating efficiency with respect to the atmosphere during defrosting, and thus high defrosting efficiency and high deodorizing efficiency. That is, in the case of the tubular heater for defrost according to the present embodiment, the deodorizing means 13 is fitted to the outer periphery of the tubular heater for defrost 1 with a very simple configuration. The heating efficiency with respect to the atmosphere for defrosting is determined by the fact that the deodorizing means 13 is mounted in close contact with the outer periphery of the glass tube 3 of the tubular heater 1 for defrosting, and that the metal radiator 15 is used. That
The fact that the metal heat radiator 15 is provided with a pair of heat radiating portions 21 and 21 ′, that the opening 22 is provided and that the defrosting tubular heater 1 is exposed, and the like greatly contributes to
This is because heat from the defrosting tubular heater 1 is effectively radiated into the atmosphere. Further, regarding the deodorizing efficiency, a large surface area contributing to deodorization can be secured by fixing the deodorizing layers 17 on both the front and back surfaces of the metal radiator 15.
The fact that the thickness of No. 7 can be increased greatly contributes.

The deodorizing means 13 has a structure in which the deodorizing layer 17 is fixed to the metal radiator 15.
7 is stronger in the case where it is fixed to the metal radiator 15 than in the case where it is fixed to a glass tube. Can be maintained. In addition, since the thickness of the deodorizing layer 17 can be increased, the deodorizing ability can be improved as described above. Also, since the deodorizing means 13 is detachably fitted to the defrosting tubular heater 1, both can be easily separated.
Therefore, in the unlikely event that either one breaks down,
This is extremely convenient for maintenance and inspection, such that only the one that has failed can be replaced separately.

Next, a second embodiment of the present invention will be described with reference to FIG. In the case of this embodiment, the provision of the metal drip-proof cover 23 in the configuration of the first embodiment allows water droplets generated during defrost to directly contact the glass tube 3 of the tubular heater 1 for defrost. This is to prevent the user from doing so. That is, in the case where water droplets directly drop on the glass tube 3 and come into contact therewith, the soundness of the glass tube 3 and thus the defrosting tubular heater 1 may be impaired. This is prevented by the drip-proof cover 23. The drip-proof cover 23 is made of metal, and is fitted to the pair of heat radiating portions 21 and 21 ′ of the deodorizing means 13 by fitting. Therefore, the drip-proof cover 23 will function as a new heat radiating part, and as a more effective heat dissipation,
The heating efficiency of the atmosphere during defrosting can be further increased.

Next, a third embodiment will be described with reference to FIG. In the case of this embodiment, the deodorizing means 13 is connected to the first
It is mounted in a direction opposite to that of the embodiment and the second embodiment. That is, the glass tube 3 of the tubular heater 1 for defrosting in a state where the pair of heat radiating portions 21 and 21 ′ is directed downward.
It is fitted to. In this way, it is possible to prevent water droplets dropped during defrosting from directly dropping onto the glass tube 3 and coming into contact with the glass tube 3. At this time, a drip-proof cover is provided as in the case of the second embodiment. It is not necessary.

The present invention is not limited to the first to third embodiments. First, as the carrier constituting the deodorizing layer 17, in each of the above-described embodiments, silica-alumina-based ceramics was used. In addition, for example, a far-infrared radiation material such as cordierite may be used. An equivalent effect can be achieved. Further, the dimensions of the respective parts described in the description of the first embodiment are merely examples, and the present invention is not limited thereto. In particular, the opening angle of the deodorizing means 13, the width of the pair of heat radiating portions 21 and 21 ', the deodorizing layer 17
May be arbitrarily set. Further, the portions of the pair of heat radiating portions 21 and 21 ′ may be curved in a corrugated shape to further secure a heat radiating area.

[0024]

As described in detail above, according to the tubular heater device for defrost according to the present invention, the structure can be realized simply and at low cost, and both the heating efficiency and the deodorizing efficiency of the atmosphere at the time of defrost can be improved. The effect is great, for example, maintenance and inspection can be facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a defrosting tubular heater device according to a first embodiment of the present invention.

FIG. 2 is a front view of the first embodiment of the present invention, showing a tubular heater for defrosting with a part cut away;

FIG. 3 is a view showing the first embodiment of the present invention, and is a cross-sectional view of the deodorizing means.

FIG. 4 is a cross-sectional view of a tubular heater device for defrost according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a tubular heater device for defrost according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Defrosting tubular heater 13 Deodorizing means 15 Metal heat radiator 17 Deodorizing layer 19 Arc-shaped holding part 21 Heat radiating part 21 'Heat radiating part 23 Drip-proof cover

Claims (4)

(57) [Scope of request for utility model registration] 1. A defrosting tubular heater, and deodorizing means detachably attached to an outer periphery of the defrosting tubular heater by fitting, wherein the deodorizing means comprises an arc-shaped holding portion and a circle. A metal radiator composed of a pair of radiators extending in the radial direction from both ends of the arc-shaped holding portion, a carrier made of a metal oxide fixed to the surface of the metal radiator, and a catalyst supported on the carrier. A defrosting tubular heater device comprising: a deodorizing layer. 2. The tubular heater for defrost according to claim 1, wherein the deodorizing layer is fixed to both front and back surfaces of the metal radiator. 3. The defrosting tubular heater device according to claim 1, wherein the deodorizing means is fitted to the defrosting tubular heater by fitting the pair of heat radiating portions of the metal radiator upward. A tubular heater device for defrosting. 4. The defrosting tubular heater device according to claim 3, wherein a drip-proof cover is mounted on the pair of heat radiating portions.