JP2006057992A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of maintaining an antifouling effect in the refrigerator over a long duration. <P>SOLUTION: Antifouling is carried out by sending fine mist sprayed from a spraying means 112 provided in a refrigeration chamber 102 into resin pores, and coating a wall surface by the mist. Since the mist is a spray of stored water 118, while there is stored water 118 in a water storage tank 111, antifouling capability does not deteriorate. Even when there is fouling, since the fine mist sprayed by the spraying means 112 enters a gap between the fouling and resin to allow easy removal of the fouling, the antifouling effect can be maintained over a long duration. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for performing antifouling on the wall surface of a refrigerator compartment constituting a refrigerator.

  In recent years, there has been an increasing trend among consumers to seek cleaner and less frequent cleaning for household refrigerators.

  Conventionally, regarding the antifouling of the wall of the refrigerator compartment constituting the refrigerator, there is one that prevents the contamination by coating with titanium oxide (see, for example, Patent Document 1).

  The prior art will be described below with reference to the drawings.

  FIG. 10 is a front view of a conventional refrigerator. As shown in FIG. 10, the heat insulating box 1 constitutes a refrigerator 2. The refrigerator 2 has a vertical frame 3 and a horizontal frame 4 at the front end of the main body, and two pairs of heat insulating doors 5 and 6 are provided to the front opening surrounded by the frames 3 and 4. In the vicinity of the center where the heat insulating doors 5 and 6 are combined, a handle 7 protruding in a U-shape is provided.

  An operation panel 9 is provided on the front panel 8 of the machine room provided above the horizontal frame 4. Further, a drain hose 10 from which water dehumidified by the cooling effect inside the refrigerator 2 is discharged is attached from the bottom surface of the heat insulating box 1.

  The entire outer surfaces of the heat insulating doors 5 and 6 are coated with titanium oxide 11. Further, the entire handle 7 provided on the heat insulating doors 5 and 6 is also coated with the titanium oxide 11.

  The outer surfaces of the heat insulating doors 5 and 6 and the handle 7 are portions where dirt is particularly conspicuous because the refrigerator is continuously used, and various germs are likely to propagate. Therefore, by coating with titanium oxide 11, ultraviolet rays contained in sunlight from the outside, light from an electric lamp, or light from a fluorescent lamp, etc. are absorbed by titanium oxide, and highly active OH radicals, O radicals, and O2 are generated. These oxidize and decompose oxidizable compounds. Therefore, bacteria and dirt which are non-oxidizing compounds are oxidatively decomposed, so that an antibacterial effect and an antifouling effect are obtained.

Moreover, it is possible to coat not only the outer surface of the heat insulation box but also the inner surface that is easily contaminated with stored items such as foods with titanium oxide. In order for titanium oxide to exhibit antibacterial and antifouling effects, ultraviolet rays are necessary. Even if there is, it can fully demonstrate the effect.
JP-A-10-95467

  However, the above conventional configuration is easy to peel off when used for a long time to coat the surface of the door, handle, and heat insulation box with titanium oxide, and when the coating is peeled off, it leads to deterioration of the antifouling effect, There was a drawback that the antifouling effect could not be sustained.

  This invention solves the conventional subject, and it aims at providing the refrigerator which can maintain an antifouling effect for a long term.

  The present invention includes a heat insulating box having a storage chamber partitioned by heat insulation, a stored water holding means provided in the heat insulating box for holding a liquid, and a spraying means for spraying the liquid held in the stored water holding means. The storage chamber is made of a fine mist sprayed from the spraying means into the storage chamber by attaching the fine mist to the wall surface by the spraying means. However, when it enters the pores of the resin, the wall surface is coated with mist to prevent contamination. Since the mist sprays the stored water as appropriate, the antifouling ability does not decrease with time, and the antifouling effect can be maintained for a long time.

  The refrigerator of the present invention has a long-term antifouling effect because the fine mist sprayed from the spray means provided in the refrigerator compartment enters the pores of the resin to coat the wall with mist and perform antifouling. A sustainable refrigerator can be provided. Further, even when dirt is attached, the fine mist sprayed by the spraying means can enter the gap between the dirt and the resin, and the dirt can be easily removed.

  The invention according to claim 1 of the present invention includes a heat insulating box having a storage compartment partitioned by heat insulation, a stored water holding means for holding a liquid provided in the heat insulating box, and held by the stored water holding means. And a water replenishing means having a spraying means for spraying the liquid that is being sprayed, and the storage chamber is made to be less likely to become dirty by adhering fine mist to the wall surface by the spraying means. The fine mist sprayed from the spraying means provided in the chamber adheres to the wall surface of the refrigerator compartment, thereby making it difficult to get dirt. Moreover, even when dirt is attached, by spraying fine mist from the spraying means, the mist can enter the gap between the dirt and the wall surface, and the dirt can be easily removed.

  According to a second aspect of the present invention, the stored water holding means includes a water storage tank, and the stored water supplied from the outside is held in the water storage tank, whereby a sufficient amount of water is replenished. Can be made more effective and less likely to get dirty. Moreover, even when dirt is attached, by spraying a fine mist from the spraying means, the mist enters the gap between the dirt and the wall surface, and the dirt can be easily removed.

  According to a third aspect of the present invention, the stored water retaining means includes a water retention device, and the retained water extracted and retained in the air in the storage chamber is retained in the water retention device. Accordingly, the user can replenish water in the storage chamber without replenishing water from the outside, and it can be more effectively prevented from being stained. Moreover, even when dirt is attached, by spraying a fine mist from the spraying means, the mist enters the gap between the dirt and the wall surface, and the dirt can be easily removed.

  According to a fourth aspect of the present invention, the storage chamber is a refrigeration chamber set in a refrigeration temperature zone, whereby the mist particles can be held in a liquid state without freezing so that dirt attached to the mist particles is removed. It can be easily removed.

  According to a fifth aspect of the present invention, a wall surface of the refrigerator compartment is made of a synthetic resin, and the fine mist enters the pores of the synthetic resin on the wall surface to make it difficult to be contaminated. When the wall surface is formed of a synthetic resin, the size of the pores is large and dirt easily enters, and the dirt that has entered remains even after wiping, but the fine mist sprayed from the spraying means provided in the refrigerator compartment is resin. Since the refrigeration chamber wall surface can be coated with mist by entering the pores, it is possible to make it difficult to get dirt.

  According to a sixth aspect of the present invention, the refrigerator compartment has a partition plate for partitioning the storage chamber, the partition plate has a synthetic resin, and the fine mist enters the pores of the partition plate to remove dirt. In the case where the storage chamber has a partition plate for storing food, and the partition plate has a synthetic resin, the partition plate is soiled because a large amount of food is put in the refrigerator compartment. Easy and difficult to clean. However, since the fine mist sprayed from the spraying means provided in the refrigerator compartment is scattered in the refrigerator, the food is placed on the upper part of the partition plate by evenly spreading the details in the refrigerator. Even so, it can be made difficult to get dirty.

  According to a seventh aspect of the present invention, the storage chamber has a door pocket for storing food, the door pocket has a synthetic resin, and the fine mist enters the pores of the partition plate to remove dirt. The door has a door pocket for storing food, and the door pocket has a synthetic resin. When the door pocket has a synthetic resin, the door pocket is easily soiled in the refrigerator compartment, and the door pocket has a synthetic resin. When it has, the size of the pores is large and dirt easily enters. Furthermore, dirt that has entered will remain even after wiping. However, since the fine mist sprayed from the spraying means provided in the refrigerator compartment enters the pores of the resin, the wall surface of the refrigerator compartment can be coated with mist, so that it is difficult to get dirt. .

  In the invention according to claim 8, the particle diameter of the mist sprayed from the spraying means is 0.01 to 5 μm, and the particle diameter of the mist sprayed from the spraying means is within the optimum range, thereby ensuring the reliability. Since it can penetrate into the pores of the resin, the antifouling effect of mist can be improved.

  According to the ninth aspect of the present invention, the amount of mist sprayed from the spraying means is 0.0014 to 0.075 g / h · l, and the amount of mist sprayed from the spraying means is optimal. By making it into such a range, the antifouling effect can be further improved.

  In the invention according to claim 10, since the spraying mist can be oxidatively decomposed by the spraying means because the spray mist is ozone mist, the attached dirt can be oxidatively decomposed.

  Since the spray mist sprayed from the spray means is an alkaline mist, the oil component can be hydrolyzed and emulsified even if the soil component is an oil component. It can be easily removed.

  In the twelfth aspect of the present invention, since the spray mist sprayed from the spraying means is an acidic mist, the bacteria attached to the refrigerator compartment can be sterilized, so that the refrigerator compartment can be kept clean. it can.

  In the invention described in claim 13, the spraying means atomizes the liquid by electrostatic atomization, and the mist particles are charged by the electrostatic atomization method, thereby increasing the adhesion rate to the inner wall surface of the refrigerator. And the optimum range of the particle diameter of the mist can be expanded.

  In the invention described in claim 14, the spraying means atomizes the liquid by an ultrasonic method, and it is possible to generate a large amount of mist with a simple device.

  Hereinafter, embodiments of a refrigerator according to the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a side sectional view of a refrigerator according to a first embodiment of the present invention, and FIG. 2 is a side sectional view of a water supply means.

  In FIG. 1, the refrigerator 100 is viewed from above by a heat insulating partition plate 101. The refrigerator compartment 102, the switching compartment 103, the vegetable compartment 104, and the freezer compartment 105 are partitioned, and the refrigerator compartment 102 and the vegetable compartment 104 are kept in a refrigerated temperature zone. The refrigerator compartment 102 is partitioned by a partition plate 106, and further has a door pocket 107. The door pocket 107 is made of synthetic resin. An ice-making water storage tank 108 is provided on the back of the refrigerator compartment 102, and a water supply path 109 is led from the ice-making water storage tank 108 to an ice making chamber (not shown) and the refrigerator compartment 102 to supply water. A water replenishing means 110 is provided in the lower part of the refrigerator compartment 102. The water replenishing means 110 is provided in the lower part of the refrigerating chamber 102, and comprises a water storage tank 111 for storing water, a spraying means 112, and a blowing means 113 for blowing mist generated by the spraying means 112 into the refrigerating chamber 102. Has been. Further, the spray means 112 is located inside the water storage tank 111, an ultrasonic element 114 that atomizes water by an ultrasonic method, a metal mesh 115 that transmits only mist having a predetermined particle diameter or less, and a metal that opposes the metal mesh 115. A plate 116, a metal mesh 115, and a high voltage power source 117 for applying a high voltage to the metal plate 116 are provided. Further, the stored water 118 in the water storage tank 111 is supplied from the water supply path 109 and stored in the water storage tank 111. About the mist production | generation apparatus of the refrigerator 100 comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, water stored in the ice-making water storage tank 108 is supplied into the water storage tank 111 via the water supply path 109 and stored as stored water 118.

  Next, the operation of the water supply means 110 is started. First, among the mist atomized by the ultrasonic element 114 that is the spraying means 112, only the fine mist having a predetermined particle diameter or less is stored from the metal mesh 115 by the electric field between the metal mesh 115 and the metal plate 116. The water tank 111 is sprayed and is filled with mist having a water particle diameter of a predetermined particle or less. The fine mist in the water storage tank 111 is sprayed as mist in the refrigerator compartment 102 by the blowing means 113. The fine mist sprayed is ozone water mist. The sprayed fine mist adheres to the wall surface of the refrigerator compartment 102 and penetrates into the pores of the resin, and the resin surface is covered with mist to make it difficult to get dirt, and the attached wall dirt is oxidized by ozone water mist. It can be disassembled to make it easier to remove dirt. Further, since the door pocket of the refrigerator compartment 102 has a large amount of stored liquid, the door pocket is the most easily dirty in the refrigerator and is difficult to clean. However, the ozone water mist sprayed from the spraying means 112 can be prevented from getting dirty even in places where it is difficult to clean.

  Further, in the present embodiment, the ultrasonic element 114 capable of spraying a large amount of mist with a simple device is used as a spraying means for atomizing water by an ultrasonic method. However, in the ultrasonic method, the particle diameter of the mist is used. However, since it is difficult to control the diameter reduction, it is possible to reduce the diameter of the mist particles by providing the metal mesh 115 that transmits only mist having a predetermined particle diameter or less.

  FIG. 3 is a diagram showing characteristics of the mist preventing effect in the refrigerator with respect to the water particle diameter in Embodiment 1 of the present invention.

  Antifouling in the refrigerator cabinet performed using mist is to prevent water particles from evenly adhering to the wall surface in the refrigerator cabinet and directly attaching dirt substances to the wall surface in the cabinet. In this way, when the dirt substance adheres to the wall surface inside the warehouse via the mist particles, for example, it is possible to easily remove the dirt simply by wiping the wall surface inside the warehouse, and cleaning the refrigerator is very easy. It becomes.

  In confirming the antifouling effect, a 5 cm square piece of ABS resin, which is a resin in a general refrigerator, is left in a refrigerator (approximately 5 ° C) in a vegetable room filled with mist of each particle size and spray amount. After spraying mist for about 6 hours at each particle size, soaking the soiled material in a liquid for 10 seconds, spraying the soiling material, wiping off the soiling 24 hours later, , Measured how much increased, and evaluated the resistance to dirt.

  At this time, the degree of contamination is determined by human sensory evaluation, and the amount of residual adhered contamination is shown for reference.

  From FIG. 3, there is an optimum water particle size of the mist to be sprayed for the dirt prevention effect, and the extent to which the sensory dirt is hardly soiled (the residual amount of attached dirt is 3 g or less) was set as the optimum range. The particle diameter of the mist falling within this optimum range was in the range of 0.01 to 1 μm. This is presumably because, in the case of particles having a large water particle diameter of 1 μm or more to be sprayed, the water particles are too large to enter the resin pores. On the other hand, since ultrafine particles of 0.01 μm or less are very small, the frequency of contact with the pores of the resin decreases, and water cannot enter the pores. This is probably because the lifetime of the state is very short and vaporizes quickly, so that most of the water particles run out before reaching the wall surface in the warehouse.

  Next, FIG. 4 is a diagram showing characteristics of the antifouling effect in the refrigerator according to Embodiment 1 of the present invention with respect to the spray amount of mist and sensory evaluation values in the cabinet with respect to the spray amount. The experimental method is the same as the experiment of FIG. Moreover, the inside of the refrigerator in this experiment was a 70-liter vegetable room.

  From FIG. 4, there is an optimum spray amount of mist for the antifouling effect on the refrigerator wall surface, and the extent to which it feels that it is hardly soiled organoleptically (the residual amount of attached dirt is 3 g or less) was set as the optimum range. The optimum spray amount was in the range of 0.1 to 5 g / h (per liter = 0.0015 to 0.075 g / h · l). This is unsuitable because the spray amount of 5 g / h or more has an antifouling effect, but excessive moisture adheres to the refrigerator in the refrigerator, causing condensation and causing deterioration in food quality in the refrigerator. When the amount is less than 0.1 g / h, the amount of spraying is too small, and the mist particles are not evenly adhered to the resin, and the entire wall surface cannot be coated with the mist particles. Conceivable.

  In the above experiment, when a 5 cm square piece of ABS resin, which is the resin in the refrigerator, is left standing in the refrigeration room, the dirt substance may flow down to the bottom due to gravity. all right. Therefore, by spraying mist particles of appropriate particle size and spray amount into the refrigerator cabinet, even if dirt adheres to the refrigerator wall in the vertical direction, that is, parallel to gravity, the dirt substance flows down to the lower part. For this reason, it is possible to provide a refrigerator in which dirt substances are collected at the lower end portion of the refrigerator wall surface in the vertical direction and only that portion is cleaned, so that the cleaning of the vertical wall surface becomes unnecessary.

  As described above, in the present embodiment, an appropriate amount of fine mist is sprayed on the wall surface by the mist spraying means against the dirt on the refrigerator inner wall surface, so that the mist enters the pores on the refrigerator inner wall surface. By coating the inside with mist, the inside of the refrigerator can be kept clean, and further, the effect of removing the internal odor adhering to the internal space can be enhanced.

  In the present embodiment, as long as the water is stored in the water storage tank, the coating in the refrigerator with mist is possible, so that the antifouling effect can be maintained for a long time without deterioration.

  Moreover, although ozone mist was sprayed in this Embodiment, disinfection and sterilization in a refrigerator can be performed by spraying acidic mist. The acidic mist as used herein refers to an acidic mist having a PH value.

  Further, in this embodiment, ozone mist is sprayed. However, by using alkaline mist, even if the soil component is oil, the oil can be hydrolyzed and emulsified, so that it is easy to remove the soil. Can do. The alkaline mist as used herein refers to an alkaline mist whose pH value is alkaline.

  In the present embodiment, the spraying means includes the ultrasonic element and the filter. However, by using only the ultrasonic element, the configuration is simplified, and a mist with lower cost can be generated.

  Further, in this embodiment, the ultrasonic method is used for the spraying means, but by using the electrostatic atomization method and electrostatically loading the mist, the fine mist loaded with a negative charge is positively added. It adheres to the charged inner wall surface and the like, and mist enters the microholes in the inner wall surface, thereby enhancing the antifouling effect.

(Embodiment 2)
FIG. 5 is a side sectional view of the refrigerator compartment in the second embodiment of the present invention.

  FIG. 6 is a side sectional view of the water replenishing means in Embodiment 2 of the present invention.

  5 and 6, the same means and the same members as those in FIGS.

  5 and 6, the refrigerator 100 is partitioned into a refrigerator room 102, a switching room 103, a vegetable room 104, and a freezer room 105 from above by a heat insulating partition plate 101, and is cooled to 1 to 6 ° C. The refrigerator compartment 102 is partitioned by a partition plate 106, and further has a door pocket 107. The door pocket 107 is made of synthetic resin. A water replenishing means 110 is provided in the lower part of the refrigerator compartment 102. The water replenishing means 110 is provided in the lower part of the refrigerating chamber 102, and includes a water storage tank 111 for storing water, a spraying means 112, and a blowing means 113 for blowing mist generated by the spraying means 112 into the refrigerating chamber 104. Has been. Further, the spraying means 112 is located inside the water storage tank 111, is positioned so as to immerse one end in the stored water 118 stored in the water storage tank 111, and the other end forms a spray tip 119 in the water storage tank 111. Installed in one section of the capillary supply structure 120 and the water storage tank 111, is located in one section of the negative electrode 121 and the water storage tank 111 for applying a negative high voltage to the stored water 118 in the water storage tank 111, and faces the negative electrode 121. The anode 122 is positioned as described above, and a high voltage power source 117 that applies a high voltage to the cathode 121.

  The operation | movement and effect | action are demonstrated below about the mist spraying means of the refrigerator comprised as mentioned above.

  First, water is stored in the water storage tank 111. In this case, defrosted water is used as the stored water 118. Next, when a negative high voltage is applied to the cathode 121 in the water storage tank 111, a plurality of liquid yarns are drawn from the spray tip 119 by the electric field existing between the spray tip 119 and the anode 122, and further charged. Dispersed into droplets to form mist. In addition, since discharge is performed during electrostatic atomization, a small amount of ozone is generated at the same time when mist is generated, and is immediately mixed with mist to form low-concentration ozone mist. This low-concentration ozone mist is sprayed into the refrigerator compartment 102 by the blowing means 113. Since the sprayed mist is electrostatically added, it adheres electrically to the inner wall surface that is positively charged in the refrigerator compartment 102, enters into fine holes in the wall surface, makes it difficult to get dirt, Even if it adheres, the dirt inside the pores rises and is decomposed and removed by ozone oxidation decomposition.

  FIG. 7 is a diagram showing characteristics of the mist preventing effect in the refrigerator in Embodiment 2 of the present invention with respect to the water particle diameter. The basic experiment method was the same as that shown in FIG.

  From FIG. 7, it can be considered that the effect of preventing dirt in the refrigerator is relatively high regardless of the particle diameter because the adhesion rate of the mist to the inner wall surface of the refrigerator is increased by the electrostatic atomization method.

  The optimum spray water particle size was 0.01 to 5 μm. This is usually too large when the water particle diameter is 1 μm or more as in the case of Form 1, and cannot penetrate into the pores of the resin. This is considered to be due to the fact that even when the thickness is about 5 μm, it adheres in such a way as to block the pores of the resin due to mist charging. Moreover, when it becomes 5 micrometers or more, the removal rate of dirt falls. In addition, when the water particle diameter is 0.01 μm or less, the lifetime as the mist particles is shortened and disappears without reaching the inner wall surface of the refrigerator.

  As described above, in the present embodiment, the electrostatic mist of the water in the water storage tank is electrostatically loaded onto the mist so that the fine mist loaded with a negative charge is positively charged in the refrigerator. It is possible to keep the inside of the refrigerator clean by coating the inner wall of the refrigerator with mist in such a manner that it adheres electrically to the wall and mist enters or covers the pores of the inner wall of the refrigerator.

  In the present embodiment, the electrostatic mist is electrostatically loaded to the mist, so that the fine mist loaded with a negative charge adheres to the positively charged inner wall surface, and the inner wall surface As a result, mist enters the fine pores of the resin, and dirt on the attached fine pores can be lifted to enhance the removal effect.

  In the present embodiment, by spraying mist containing ozone into the refrigerator compartment by the electrostatic atomization method, the adhering odor on the inner wall surface of the cabinet or the odor inside the cabinet is oxidized and decomposed by the ozone mist. Can be deodorized.

  In the present embodiment, the water supply means is provided in the refrigerator compartment, but by providing the water supply means in the vegetable room, the low temperature room, and the switching room, it can be used for vegetables and fruits, preserved meat and fish, processed foods, etc. Even moisturizing properties can be improved.

(Embodiment 3)
FIG. 8 is a diagram showing the effect on the spray amount and the water particle diameter in Embodiment 3 of the present invention. FIG. 9 is a photomicrograph of the pores of vegetables in Embodiment 3 of the present invention.

  FIG. 8 summarizes the correlation between the mist particle size and the spray amount according to the first and second embodiments, and the action and effect of the mist in the refrigerator compartment varies depending on the mist particle size and the spray amount. I understand.

  Fig. 8 shows a 70-liter vegetable room maintained at an ambient temperature of 5 ° C, and the particle size and spray amount of the mist are varied to revitalize the vegetables inside the refrigerator, and the harmful effects of agricultural chemicals attached to the vegetables. It shows the range in which the effects of removing substances and the antifouling effect of dirt adhering to the wall surface of the refrigerator appear.

  First, vegetable resuscitation will be described.

  As shown in FIG. 9, the minor diameter of the pore diameter in a state where the pore which is a portion on the surface of the vegetable where moisture is adjusted is generally opened is about 10 to 15 μm. Therefore, if the particle system of the mist sprayed for the purpose of increasing the moisture content of the vegetable is not 15 μm or less or 10 μm or less, the mist cannot physically enter the inside of the vegetable. Further, according to the experimental results, 3 μm or less, which is about 1/5 or less of the pore diameter in the case of light irradiation, and 0.05 μm or less in the case of no light irradiation (however, in the case of the electrostatic atomization method, 0. 5 μm or less), it was found that the moisture content recovery rate was 70% or more, and the invasion was more actively performed through the pores of the mist particles, and the moisture content recovery effect of vegetables was great.

  On the other hand, if the mist diameter is too small, the mist particles are easily vaporized this time, and the retention rate of the mist particles is lowered. According to the experiment, most mist particles are vaporized at 0.001 μm or less, and as a result, moisture cannot be supplied from the pores of the vegetable to the inside, and the moisture content restoring effect of the vegetable is hardly obtained. According to the results of the experiment, when the particle size of the mist is 0.003 μm or more in the case of the electrostatic atomization method and 0.005 μm or more in the case of other methods, the moisture content restoration rate of the vegetable becomes 50% or more, It is preferable that the vegetable can be eaten deliciously. More desirably, the mist particle size is 0.005 μm or more in the case of the electrostatic atomization method, and 0.008 μm or more in the case of other methods, so that the moisture content of the vegetable The restoration rate was raised to 70% or more, and it was found that it can be eaten sufficiently.

  As described above, in order to increase the moisture content of vegetables with mist, the particle diameter of mist is within the range of 0.005 μm (0.003 μm in the case of electrostatic atomization method) to 10 μm in the case of light irradiation. It was found that the thickness was preferably in the range of 0.008 μm (0.005 μm in the case of the electrostatic atomization method) to 3 μm.

  In addition, in order to increase the moisture content of vegetables by mist when there is no light irradiation, the particle diameter of mist is 0.005 μm (0.003 μm in the case of electrostatic atomization) to 0.5 μm (electrostatic fog) In the case of the atomization method, it is preferably in the range of 0.8 μm), more desirably from 0.008 μm (0.005 μm in the case of electrostatic atomization method) to 0.05 μm (0.5 μm in the case of electrostatic atomization method). ).

  Furthermore, when the particle diameter can be controlled with higher accuracy, as shown in the first or second embodiment, in the case of light irradiation, mist spraying is performed with a mist particle diameter in the range of 0.01 μm to 1 μm, and light irradiation is performed. In the case of none, when carried out at 0.01 ± 0.002 μm, the mist particles penetrate more actively from the pores, and the moisture content recovery rate of the vegetables can be further increased.

  Next, the removal of harmful substances such as agricultural chemicals on the vegetable surface will be described.

  In this experiment, malathion, which is a general vegetable pesticide, is attached to the vegetable surface and placed in a mist atmosphere for 12 hours, and the same amount of malathion is attached to the vegetable surface and the vegetable is not in a mist atmosphere for 12 hours. What was placed in the room was washed in running water for 10 seconds, and the removal rate of malathion was 50% or more compared to that in a normal vegetable room where there was no mist atmosphere. .

  According to the experiment, the upper limit of the particle size at which the removal rate of malathion is about 50% compared to that in a normal vegetable room is 5 μm or less, and the preferred particle size that makes the removal rate of malathion more than 50% more reliably. The upper limit of was found to be 3 μm or less. This is because, when removing harmful substances such as agricultural chemicals on the vegetable surface, the unevenness of the general vegetable surface is 5 μm or more, and if it is 5 μm or more, the mist particles cannot enter the unevenness of the vegetable surface, This is probably because the harmful substances cannot be taken into the mist particles.

  Moreover, the upper limit of the particle diameter at which the removal rate of malathion was 70% or more was 0.5 μm.

  Further, it was found that the lower limit of the particle diameter with a malathion removal rate of 50% or more was 0.005 nm or more, and the lower limit of the particle diameter with a malathion removal rate of 70% or more was 0.01 μm or more. This is considered to be because the contact frequency between the mist and the pesticide decreases if the particle size is too small, so that the pesticide cannot be taken into the mist. Therefore, in such a small particle diameter range, the effect of removing the agricultural chemicals can be enhanced by increasing the amount of mist sprayed.

  Thus, it is desirable that the amount of mist sprayed is larger in the range where the mist particle size is small, but at 50 g / h (per liter = 0.75 g / h · l) or more, there is almost no pesticide removal effect. Since it does not change, it is 50 g / h (per liter = 0.75 g / h · l) or less, and 10 g / h (per liter = 0) considering the water rot of the vegetable surface as explained in the above vegetable resuscitation. It is desirable to use a mist having a particle size that can sufficiently remove agricultural chemicals even at a rate of .15 g / h · l) or less.

  As for the lower limit of the spray amount of mist, in addition to the decrease in the frequency of contact with the pesticide when the spray amount is small, the pesticide is charged with a reverse charge by, for example, electrostatic mist charging. In the case of the type adsorbed on the mist, the charged state is shortened, and it is considered that the effect of incorporating the agricultural chemical into the mist cannot be obtained.

  Therefore, the lower limit of the spray amount of mist is 1 g / h (per liter = 0.015 g / h · l) or more, preferably 5 g / h (per liter = 0.075 g / h · l) or more. It turned out to be in the proper range.

  As described above, in order to perform mist spray for the purpose of removing agricultural chemicals from vegetables, the particle diameter of the mist is within the range of 0.005 μm to 5 μm, and the spray amount is 1 g / h (per liter = 0.015 g). / H · l) to 50 g / h (per liter = 0.75 g / h · l) or less is a useful optimum range.

  Next, the antifouling effect in the refrigerator will be described.

  Antifouling in the refrigerator cabinet performed using mist is to prevent water particles from evenly adhering to the wall surface in the refrigerator cabinet and directly attaching dirt substances to the wall surface in the cabinet. In this way, when the dirt substance adheres to the wall surface in the warehouse via the water particles, for example, it is possible to easily remove the dirt simply by wiping the wall surface in the warehouse, and cleaning the refrigerator is very easy. It becomes.

  In confirming the antifouling effect, in a 70 liter vegetable room filled with mist of each particle size and spray amount, after a dirt substance is sprayed on ABS resin, which is a resin in a general refrigerator, it becomes dirty after a certain period of time. When wiping off, the optimal range was defined as the area in which no soiled material remained.

  As shown in FIG. 8, the particle system of the mist effective for antifouling in the warehouse was in the range of 0.01 μm to 1 μm. This is considered to be because when the sprayed water particle diameter is larger than 1 μm, the particles cannot enter the pores of an ABS resin, which is a general refrigerator resin. However, if the mist particles are charged and adhered to the inner wall surface by the electrostatic atomization method, the upper limit of 1 μm of the optimum range can be increased to about 5 μm.

  Further, if the mist particle size is smaller than 0.01 μm, it is considered that the mist is easily vaporized and at the same time the contact frequency with the inner wall surface is lowered and it is difficult to adhere to the inner wall surface. Therefore, in such a small particle diameter range, the antifouling effect can be further enhanced by increasing the amount of mist sprayed.

  Thus, it is desirable that the amount of mist sprayed is larger in the range where the mist particle size is small, but if it is 5 g / h (per liter = 0.075 g / h · l) or more, excessive moisture adheres to the wall surface. However, it is unsuitable because the food in the warehouse may cause quality deterioration due to condensation, and if it is 0.1 g / h (0.0014 g / h · l per liter) or less, The fouling effect is not obtained so much, and this is considered to be because the frequency of contact of the mist with the pores of the ABS resin decreases.

  As described above, in order to perform mist spraying for the purpose of antifouling in the warehouse, the mist particle size is in the range of 0.01 μm to 1 μm (5 μm in the case of electrostatic atomization), and the spray amount is The useful range is 0.1 g / h (per liter = 0.014 g / h · l) to 5 g / h (per liter = 0.075 g / h · l).

  Thus, it turned out that various useful effects in the refrigerator compartment can be obtained depending on the relationship between the particle size of the mist and the spray amount. By these, the usability of a refrigerator can be improved more by performing mist spraying that achieves a plurality of desired effects.

  As described above, since the refrigerator according to the present invention can prevent contamination in advance, it can be applied to residential spaces and commercial refrigerators.

Side sectional view of the refrigerator according to the first embodiment of the present invention. Side sectional view of water replenishment means in Embodiment 1 of the present invention The characteristic figure with respect to the water particle diameter of the mist of the dirt prevention effect in the refrigerator in Embodiment 1 of this invention The figure which showed the characteristic with respect to the spray amount of the mist of the dirt prevention effect in the refrigerator in Embodiment 1 of this invention, and the sensory evaluation value in a store | warehouse | chamber with respect to the spray amount Side sectional view of the refrigerator in the second embodiment of the present invention. Side sectional view of water replenishing means in Embodiment 2 of the present invention The characteristic figure with respect to the water particle diameter of the mist of the dirt prevention effect in the refrigerator in Embodiment 2 of this invention The figure which showed the effect with respect to the spray amount and water particle diameter in Embodiment 3 of this invention Micrograph of the pore part of the vegetable in Embodiment 3 of this invention Front view of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Refrigerator 101 Heat insulation partition plate 102 Refrigeration room 103 Switching room 104 Vegetable room 105 Freezing room 106 Partition board 107 Door pocket 108 Ice-making water storage tank 109 Water supply path 110 Water supply means 111 Water storage tank 112 Spraying means 113 Air blowing means 114 Ultrasonic element 115 Metal mesh 116 Metal plate 117 High voltage power supply 118 Reserved water 119 Spray tip 120 Capillary supply structure 121 Cathode 122 Anode

Claims (14)

  Water having a heat insulation box having a storage chamber partitioned by heat insulation, a stored water holding means for holding the liquid provided in the heat insulation box, and a spraying means for spraying the liquid held in the stored water holding means The refrigerator is provided with a replenishing means, and the storage chamber is made difficult to be soiled by attaching fine mist to the wall surface by the spraying means.   The refrigerator according to claim 1, wherein the stored water holding means includes a water storage tank, and stored water supplied from outside is stored in the water storage tank.   2. The stored water holding means includes a water holding device, and the stored water extracted and held in the air in the storage chamber is held in the water holding device. Refrigerator.   The refrigerator according to any one of claims 1 to 3, wherein the storage room is a refrigerating room set in a refrigerating temperature zone.   5. The wall according to claim 1, wherein a wall surface of the refrigerating chamber is made of a synthetic resin, and the fine mist enters the pores of the synthetic resin on the wall surface to make it difficult to get dirty. refrigerator.   The refrigerating chamber has a partition plate for partitioning the storage chamber, and the partition plate has a synthetic resin, and the fine mist enters the pores of the synthetic resin in the partition plate and becomes dirty. The refrigerator according to any one of claims 1 to 5, wherein the refrigerator is difficult to attach.   2. The storage chamber has a door pocket for storing food, the door pocket has a synthetic resin, and the fine mist enters the pores of the partition plate to make it difficult to get dirt. The refrigerator according to any one of 6 to 6.   The refrigerator according to any one of claims 1 to 7, wherein a particle diameter of mist sprayed from the spraying means is 0.01 to 5 µm.   The refrigerator according to any one of claims 1 to 8, wherein a generation amount of mist sprayed from the spraying means is 0.0014 to 0.075 g / h · l.   The refrigerator according to any one of claims 1 to 9, wherein the spraying mist is ozone mist by the spraying means.   The refrigerator according to any one of claims 1 to 10, wherein spray mist is alkaline mist by the spraying means.   The refrigerator according to any one of claims 1 to 11, wherein the spraying mist is acidic mist by the spraying means.   The refrigerator according to any one of claims 1 to 12, wherein the spraying means atomizes the liquid by electrostatic atomization.   The refrigerator according to any one of claims 1 to 13, wherein the spraying means atomizes the liquid by an ultrasonic method.

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