JPH062083U - Tubular heater device for defrosting - Google Patents

Abstract

(57) [Summary] [Purpose] Defrosting that has a simple structure and can be realized at low cost, satisfies both defrosting efficiency and deodorizing efficiency, and that can only replace defective parts easily. An object of the present invention is to provide a tubular heater device. A defrosting tubular heater and deodorizing means detachably attached to the outer periphery of the defrosting tubular heater by fitting are provided, and the deodorizing means includes an arc-shaped holding portion and the arc-shaped holding portion. Deodorant consisting of a metal heat radiator consisting of a pair of heat radiators extending in the radial direction from both ends of the section, a carrier made of metal oxide fixed to the surface of the metal radiator and a catalyst carried on the carrier It is composed of layers.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to, for example, a defrosting tubular heater device used in a refrigerator, and in particular, a defrosting tubular heater that absorbs a malodorous component in the refrigerator when the defrosting tubular heater is not functioning and is not heated. The present invention relates to an improvement in a device equipped with a deodorizing means for oxidatively decomposing a malodorous component adsorbed by heat when it exhibits a defrosting function.

[0002]

[Prior art]

 In the refrigerator, various malodorous components are generated from various foods. Typical examples of this type of malodorous component are methylcaptan, which is a component of rotten odor of vegetables and fruits, and trimethylamine and trimethyloxane, which are components of rotten odor of meat and fish. Furthermore, there are fatty acids, acetic acid, and the like, which are odor components of fermented foods. 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.

For example, as a first conventional example, there is a deodorizing device using an ozone generator and a catalyst. That is, the ozone generator and the catalyst are installed in the refrigerator. Ozone generated by the ozone generator reacts with odors, and the odors are oxidatively decomposed and removed, and excess ozone is decomposed and removed by a catalyst. Further, as a second conventional example, there is a deodorizing device as disclosed in Japanese Patent Publication No. 3-64169. In other words, a defrosting heater in which a deodorizer whose surface is covered with a porous material having high thermal conductivity is placed in a refrigerator and a heater wire is housed in a glass tube in the vicinity of the deodorizer is used. Install. When the defrosting heater is not functioning and de-energized, the deodorizer adsorbs the malodorous component. Then, the odorous components adsorbed on the deodorizing body are oxidatively decomposed when the defrosting heater functions and electricity is applied.

Further, as a third conventional example, there is a deodorizing device as disclosed in Japanese Patent Application Laid-Open No. 2-275277 and Japanese Utility Model Application No. 4-46882. This is a structure in which a tubular deodorizer 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. It adsorbs the components and oxidizes and decomposes the odorous components that are adsorbed when the defrosting heater functions and electricity is applied. Further, as a fourth conventional example, there is a deodorizing device as disclosed in Japanese Patent Laid-Open No. 2-275277 and Japanese Utility Model Laid-Open No. 4683/1992. First, there is a defrosting heater having a configuration in which a heater wire is housed in a glass tube, and a deodorizing layer containing a platinum group catalyst is provided on the outer periphery of the defrosting heater. Is almost the same as the conventional example.

[0005]

[Problems to be solved by the device]

 The above-mentioned conventional configuration has the following problems. First, in the case of the first conventional example, there is a problem that the structure 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, as in the case of the second conventional example, since the defrosting heater and the deodorizer 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 poor in heating the deodorizer to enhance the deodorization efficiency. 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 heated efficiently, so that the deodorizing efficiency can be improved. However, there was a problem that the heating efficiency of the atmosphere for defrosting was low. Further, in the case of the fourth conventional example, since the deodorant is applied and fired in layers on the surface of the glass tube, there is a possibility that the deodorant may peel off due to the difference in the thermal expansion coefficient between the glass tube and the deodorant material. Therefore, the deodorant body cannot be formed thick, and therefore, the heating efficiency of the atmosphere for defrosting is high, but the deodorizing efficiency is low. In this way, there was nothing that had a simple structure and could be realized at low cost, and yet satisfied both defrosting efficiency and deodorizing efficiency. Another problem is that maintenance / inspection work is difficult and even if a defective part should occur, it is difficult to replace only that part. This is especially true in the case of the third and fourth conventional examples, and since the defrosting heater and the deodorizing layer are integrally formed, it is impossible to replace only one of them. there were.

The present invention has been made on the basis of such a point, and its object is to achieve a simple structure and low cost, satisfy both defrosting efficiency and deodorizing efficiency, and SUMMARY OF THE INVENTION It is an object of the present invention to provide a tubular heater device for defrosting that can easily replace only a defective part.

[0007]

[Means for Solving the Problems]

 To achieve the above object, a defrosting tubular heater device according to the present invention comprises a defrosting tubular heater and deodorizing means detachably attached to the outer periphery of the defrosting tubular heater by fitting. The deodorizing means is a metal heat radiator consisting of an arcuate holder and a pair of heat radiators extending from both ends of the arcuate holder in the radial direction, and a metal radiator fixed to the surface of the metal radiator. It is characterized in that it is composed of a carrier composed of an oxide and a deodorizing layer composed of a catalyst supported on the carrier. At that time, it is considered that the deodorizing layer is fixed to both the front and back surfaces of the metal radiator. Further, it is possible to attach the deodorizing means to the defrosting tubular heater by fitting so that the pair of heat radiating portions of the metal radiator are directed upward. Further, it is conceivable to attach a drip-proof cover on the pair of heat radiating portions.

[0008]

[Action]

 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. In the unlikely event that either one fails, both can be detached and only the one that has failed can be replaced. Further, the deodorizing means is fitted in close contact with the defrosting tubular heater, and a metal radiator is provided, and the metal radiator has a pair of radiators extended in the radiation direction. At the same time, an opening is provided between the pair of heat radiating parts, and the tubular heater for defrosting is exposed. Therefore, heat can be efficiently dissipated and the atmosphere for defrosting can be improved. High heating efficiency. Further, the surface area of the metal radiator is larger than the surface area of the tube of the defrosting tubular heater, so that the deodorizing layer can be provided in a larger area than the deodorizing layer is provided on the surface of the defrosting tubular heater. Therefore, high deodorization efficiency can be expected. Further, when considering the fixing strength of the deodorizing layer to the base, the metal plate is stronger than the tube (eg, glass tube). Therefore, the work of providing the deodorizing layer is easy and the cost is low. Further, since the thickness of the deodorizing layer can be increased, it is also advantageous from the viewpoint of the above deodorizing efficiency. Further, since the concern about peeling of the deodorizing layer due to dropping of water or the like is significantly reduced, a stable function can be exerted over a long period of time.

Further, when the deodorizing layer is fixed on both 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 enhanced. Also, if the deodorizing means is installed with the pair of heat radiating parts pointing upward, the heat from the defrosting tubular heater will be efficiently dissipated upward from the opening, and during defrosting The heating efficiency of the atmosphere can be increased. Furthermore, when the drip-proof cover is provided, it is possible to prevent water drops during defrosting from directly dripping on the defrosting tubular heater.

[0010]

【Example】

 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The tubular heater device for defrosting according to this embodiment has a structure as shown in FIG. First, there is a tubular heater 1 for defrosting, and this tubular heater 1 for defrosting has a structure 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. The above dimensions are merely examples. A coil-shaped heating wire 5 made of, for example, iron-chromium-aluminum alloy (Fe-Cr-Al) or iron-chromium alloy (Fe-Cr) is housed and arranged in the glass tube 3.

Lead wires 9 and 9 ′ are connected to both ends of the coil-shaped heating wire 5 via connection terminals 7. Only one of the connection terminals 7 is shown. Further, caps 11 and 11 ', which are molded silicone rubber products, are attached to both ends of the glass tube 3, and the connection terminals 7 are fixed to the caps 11 and 11'. In addition, the lead wires 9 and 9'are coated with a silicone rubber insulating coating to enhance their mechanical strength. Specifically, it is a tube made of glass braid, polyvinyl chloride (PVC), polyethylene (PE), or the like. The power consumption of the defrosting tubular heater 1 having the above structure is 140 W (100 V AC). The power consumption varies depending on the conditions such as the capacity and space of the refrigerator, the capacity of the cooler, etc. Normally, the surface temperature of the glass tube 3 is designed to be 250 ° C to 600 ° C. Be done.

A deodorizing means 13 is removably attached to the outer peripheral portion of the glass tube 3 of the defrosting tubular heater 1 by fitting. As shown in FIG. 3, the deodorizing means 13 is composed of a metal heat radiating body 15 and a deodorizing layer 17 adhered to both front and back surfaces of the metal heat radiating body 15. The metal radiator 15 is composed of an arc-shaped holding portion 19 and a pair of heat-radiating portions 21 and 21 'having both ends of the arc-shaped holding portion 19 extended in the radial direction, and is made of an iron plate having a thickness of 0.35 mm. Has been done. The inner diameter of the arcuate holding portion 19 is 10 mm, and 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 °. Further, the length (L 1) of the deodorizing means 13 is 260 mm. Further, the width (H) of the pair of heat radiation portions 21 and 21 'is 40 mm. It should be noted 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 adsorbing action, and a platinum group catalyst that oxidizes and decomposes the malodorous components supported and adsorbed on the carrier, As described above, the metal radiator 15 is fixed on both front and back surfaces. The deodorization layer 17 is fixed to the metal radiator 15 by the following procedure. First, the surface of the metal radiator 15 is sandblasted, and then a silica / alumina-based carrier is applied and baked on the surface. Next, the metal radiator 15 is dipped in a platinum chloride solution and then dried to support the platinum catalyst on the carrier. The deodorizing layer 17 is fixed to both the front and back surfaces of the metal radiator 15 through such a procedure. The structure of the deodorizing layer 17 is not limited to that described above, and for example, it is conceivable to use porous ceramics such as zeolite as the carrier, that is, the adsorbent. Further, the catalyst may be other precious metals, rare earth oxides, etc., in addition to the platinum group catalyst.

Further, as described above, in the case of the defrosting tubular heater device according to the present embodiment, the deodorizing means 13 is detachably attached to the outer periphery of the glass tube 3 of the defrosting tubular heater 1 by fitting. It is attached to the glass tube 3 so that it can be easily attached to and detached from the glass tube 3. Further, the metal radiator 15 of the deodorizing means 13 is provided with a pair of heat radiators 21 and 21 ', and both the front and back surfaces of the metal radiator 15 function effectively as deodorizing surfaces. Therefore, for example, the effective area that contributes to deodorization is significantly wide, about 5.8 times, as compared with the configuration of the fourth conventional example.

The operation will be described based on the above configuration. First, the tubular heater for defrosting according to the present embodiment is attached below the cooler of the refrigerator. Then, power is supplied at a timing of 2 to 3 times a day, or once every 4 to 5 days. When the defrosting tubular heater 1 is not operating (not heating), the deodorizing means 13 adsorbs and removes the malodorous component in the refrigerator. On the other hand, when the defrosting tubular heater 1 is in operation (during heating), the platinum group catalyst in the deodorizing layer 17 of the deodorizing means 13 functions to oxidize and decompose the malodorous components adsorbed by the adsorbent. To play. Such an action is repeated in synchronization with the on / off of the defrosting tubular heater 1.

Further, when the tubular heater for defrosting 1 is in the operating state, the defrosting function will be exerted, and the action 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 the defrosting action. At that time, the metal radiator 15 of the deodorizing means 13 greatly contributes to the dissipation of heat into the atmosphere. First, since it is made of metal, it has a high thermal conductivity, and the heat from the defrosting tubular heater 1 is efficiently transmitted to the outer peripheral side and dissipated in the atmosphere. Further, since the pair of heat radiating portions 21 and 21 'are provided, heat can be efficiently dissipated in the atmosphere also by this. Further, since the portion between the pair of heat radiating portions 21 and 21 'is an opening 22 and the tubular heater 1 for defrosting is exposed, heat is efficiently dissipated into the atmosphere from there. . In this way, since the heating efficiency of the atmosphere during defrosting is high, the defrosting efficiency is also high in the end.

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 mentioned in the description of the conventional example will be described. First, we compared the heating efficiency when heating the atmosphere during defrosting. That is, a plastic closed box having a side of 500 mm is prepared, and the defrosting tubular heater device according to the present embodiment and the defrosting tubular heater device according to the fourth conventional example are installed therein. Then, compare the degree of temperature rise in each closed box. That is, the time required for the temperature of the central portion near the ceiling of the closed box to rise by 5 ° C after the start of energization was measured. As a result, it took about 11 minutes in the case of the fourth conventional example, whereas it took about 5 minutes in the case of the defrosting tubular heater device according to the present example. In other words, the heating efficiency of the atmosphere during defrosting is correspondingly high.

Next, the deodorizing ability was compared. Prepare 1g of raw garlic as a substance that gives off a bad smell and grind it. On the other hand, the tubular heater device for defrosting according to the present embodiment and the tubular heater device for defrosting according to the fourth conventional example are respectively installed in the closed box, and the ground garlic is put therein. In this state, the cycle of leaving for 5 hours and energizing for 1 hour was repeated 4 times. After that, the air in each sealed box was sampled and an odor test was conducted. In this odor test, five odor experts, called verifiers, were on standby to judge whether or not the air taken from each of the above-mentioned sealed boxes had an odor. As a result, in the case of the fourth conventional example, all of the five verifiers determined to "smell", whereas in the case of the present example, it was determined that "smell" among the five verifiers. Only one was judged. That is, it means that the malodorous components were effectively adsorbed and removed.

As described above, according to this embodiment, the following effects can be obtained. First, it has a relatively simple structure and can be manufactured at low cost, and has high heating efficiency for the atmosphere during defrosting, and thus high defrosting efficiency and high deodorizing efficiency. That is, in the case of the defrosting tubular heater device according to the present embodiment, the deodorizing means 13 is fitted to the outer periphery of the defrosting tubular heater 1 and has an extremely simple structure. Further, the heating efficiency with respect to the atmosphere for defrosting is that the deodorizing means 13 is attached in a state of being in close contact with the outer periphery of the glass tube 3 of the defrosting tubular heater 1, and that the metal radiator 15 is used. That the metal radiator 15 is provided with a pair of heat radiating portions 21, 21 ', the opening 22 is provided and the defrosting tubular heater 1 is exposed, and the like. The heat from the defrosting tubular heater 1 is effectively dissipated in the atmosphere. Regarding deodorization efficiency, it is possible to secure a large surface area that contributes to deodorization by fixing the deodorization layer 17 on both front and back surfaces of the metal radiator 15, and to make the thickness of the deodorization layer 17 large. There is.

Further, the deodorizing means 13 is configured to fix the deodorizing layer 17 to the metal radiator 15, and the fixing strength of the deodorizing layer 17 is higher than that of fixing to the glass tube. Since it is stronger when the deodorizing layer 17 is adhered to the deodorizing layer 17, the possibility that the deodorizing layer 17 is peeled off due to the dropping of water droplets is reduced, and the soundness can be maintained for a long time. Further, since the thickness of the deodorizing layer 17 can be increased, it is possible to improve the deodorizing ability as described above. Further, since the deodorizing means 13 is detachably fitted to the defrosting tubular heater 1, both can be easily detached. Therefore, in the unlikely event that either one fails, both can be separated and only the one that has failed can be replaced. This is extremely convenient for maintenance and inspection.

Next, a second embodiment of the present invention will be described with reference to FIG. In the case of this embodiment, by providing the metallic drip-proof cover 23 in the configuration of the first embodiment, water drops generated during defrosting come into direct contact with the glass tube 3 of the defrosting tubular heater 1. This is to prevent this. That is, when a water droplet directly drops on the glass tube 3 and comes into contact with the glass tube 3, 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 functions as a new heat radiating portion, so that heat can be more effectively dissipated and the heating efficiency of the atmosphere during defrosting can be further enhanced.

Next, a third embodiment will be described with reference to FIG. In the case of this embodiment, the deodorizing means 13 is attached in the opposite direction to the case of the first and second embodiments. That is, it is fitted in the glass tube 3 of the defrosting tubular heater 1 such that the pair of heat radiating portions 21 and 21 'are directed downward. By doing so, it is possible to prevent water drops that are dropped during defrosting from directly dropping and contacting the glass tube 3, and at that time, as in the case of the second embodiment, the drip-proof cover is used. It is not necessary to provide it.

The present invention is not limited to the first to third embodiments. First, as the carrier constituting the deodorizing layer 17, silica / alumina-based ceramics were used in the above-mentioned respective examples, but in addition to this, far-infrared radiation substances such as cordierite are used. Can have the same effect. Further, the dimensions of each part described in the description of the first embodiment are merely examples and are 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 thickness of the deodorizing layer 17 and the like may be set arbitrarily. In addition, the pair of heat radiating portions 21 and 21 ′ may be curved in a corrugated plate shape in order to further secure a heat radiating area.

[0024]

[Effect of device]

 As described above in detail, the tubular heater device for defrosting according to the present invention has a simple structure and can be realized at low cost, and at the same time, it is possible to enhance both the heating efficiency and the deodorizing efficiency of the atmosphere during defrosting. Its effects are great, such as easy maintenance and inspection.

[Brief description of 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 showing a first embodiment of the present invention in which a tubular heater for defrosting is partially cut away.

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

FIG. 4 is a cross-sectional view of a tubular heater device for defrosting, showing a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of a tubular heater device for defrosting, showing a third embodiment of the present invention.

[Explanation of symbols]

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

Claims (4)

[Scope of utility model registration request] 1. A defrosting tubular heater, and deodorizing means removably attached to the outer periphery of the defrosting tubular heater by fitting, wherein the deodorizing means comprises an arc-shaped holding portion and a circle. From a metal radiator consisting of a pair of radiators extending in the radial direction from both ends of the arc-shaped holder, a carrier made of metal oxide fixed to the surface of the metal radiator and a catalyst carried on the carrier. A tubular heater device for defrosting, comprising: 2. The tubular heater device for defrosting according to claim 1, wherein the deodorizing layer is adhered to both front and back surfaces of the metal radiator. 3. The defrosting tubular heater device according to claim 1 or 2, wherein the deodorizing means is attached to the defrosting tubular heater by fitting so that the pair of heat radiating portions of the metal radiator are directed upward. A tubular heater device for defrosting, which is characterized in that 4. The tubular heater device for defrosting according to claim 3, wherein a drip-proof cover is attached on the pair of heat radiating portions.