JP4400523B2 - refrigerator - Google Patents

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. 25 is a front view of a conventional refrigerator. As shown in FIG. 25, 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 soiled with stored items such as foods with titanium oxide. In order for titanium oxide to exhibit antibacterial and antifouling effects, ultraviolet rays are necessary, but this amount of ultraviolet rays may be small, and it is a small amount of ultraviolet rays contained in the light inserted from the outside each time the heat insulation door is opened and closed. 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 comprises a heat insulation box having a storage compartment partitioned by heat insulation, and a spray means for spraying mist provided in the heat insulation box, and the mist sprayed by the spray means. Is negatively charged, and the storage chamber is a refrigeration chamber set in a refrigeration temperature zone, and the mist is electrically attached to the inner wall surface of the refrigerator that is positively charged in the refrigeration chamber . The wall surface is coated or the dirt is lifted to make it difficult to get the dirt. The fine mist sprayed from the spraying means provided in the refrigerator compartment becomes dirty by attaching the fine mist to the refrigerator compartment wall surface. It can make it hard to stick. 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. Further, 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 can be easily removed.

The invention according to claim 2, the refrigerated compartment has a partition plate for partitioning the refrigerating compartment, the partition plate be those having a synthetic resin, by mist adhering to the partition plate, wherein The partition plate is coated or lifted up to make it difficult to get dirty, and thus the partition plate is usually easily dirty due to a lot of food in the refrigeration chamber and is difficult to clean. In particular, when the partition plate has a synthetic resin, since dirt enters the pores of the resin, the dirt is likely to stick, but fine mist sprayed from the spraying means provided in the refrigerator compartment scatters in the refrigerator. Therefore, even if it is in the state which has the food in the upper part of a partition plate, it can make it difficult to get dirt by spreading the inside of a refrigerator equally to details.

The invention according to claim 3, the cold room having a door pocket for storing the food, the door pockets be those having a synthetic resin, that the mist is attached to the door pocket, the Coating the door pocket or raising the dirt to make it difficult to get dirty, which usually makes the door pocket easily dirty in the refrigerated room, and if the door pocket has synthetic resin, the size of the pores Large and easy to get dirt. Furthermore, dirt that has entered will remain even after wiping. In particular, when the door pocket has a synthetic resin, dirt enters the pores of the resin, so that the dirt is likely to stick, but fine mist sprayed from the spraying means provided in the refrigerator compartment enters the resin pores. As a result, the wall surface of the refrigerator compartment can be coated with mist, so that it is difficult to get dirt.

Invention of Claim 4 is equipped with the heat insulation box which has the storage chamber divided | segmented by heat insulation, and the spraying means which is provided in the said heat insulation box, and sprays mist, The mist sprayed by the said spraying means becomes minus The storage chamber is a vegetable room set in a refrigeration temperature zone, and the mist is electrically attached to the inner wall surface that is positively charged in the vegetable chamber, thereby coating the inner wall surface. In this case, it is possible to easily remove the dirt adhering to the mist particles because the mist particles can be kept in a liquid state without freezing.

Parallel invention of claim 5, which provided a dirt reservoir collect dirt material to the lower end of the vertical direction, that is gravity and parallel to the direction of the wall surface in the internal wall of the storage chamber, a vertical direction, that gravity Even if dirt is attached to the refrigerator wall, the dirt material will flow down to the bottom, so if you install a dirt reservoir to collect the dirt material at the lower end of the refrigerator wall in the vertical direction and clean only that part, the vertical wall It is possible to provide a refrigerator that does not require cleaning.

The invention according to claim 6 has a stored water holding means that is provided in the heat insulating box and holds the liquid, and the spraying means sprays the liquid held in the stored water holding means, The stored water holding means is provided with a water storage tank, in which the stored water supplied from the outside is held in the water storage tank , so that a sufficient amount of water can be replenished and more effective. It can be made difficult 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 seventh aspect of the present invention, the spray means sprays mist with water generated by condensation of moisture contained in the air in the storage chamber . Moisture can be reliably generated by high-humidity air due to intrusion or the like.

  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 Embodiment 1 of the present invention, and FIG. 2 is a side sectional view of a water supply means.

  In FIG. 1, the refrigerator 100 is partitioned from the top by a heat insulating partition plate 101 into a refrigerator compartment 102, a switching chamber 103, a vegetable compartment 104, and a freezer compartment 105. The refrigerator compartment 102 and the vegetable compartment 104 are kept in a refrigerated temperature zone. ing. 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 bottom surface 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 210 is provided in the lower part of the refrigerator compartment 102. The water replenishing means 210 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. The spray means 112 is located inside the water storage tank 111 and includes an ultrasonic element 114 that atomizes water by an ultrasonic method and a metal mesh 115 that transmits only mist having a predetermined particle diameter or less. 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 210 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 sprayed from the metal mesh 115, and the water tank 111 has a predetermined water particle diameter. It will be in the state where mist below particles filled up. The fine mist in the water storage tank 111 is sprayed as mist in the refrigerator compartment 102 by the blowing means 113. The sprayed fine mist adheres to the wall surface of the refrigerator compartment 102 and penetrates into the pores of the resin, and covering the resin surface with the mist makes it difficult to get dirt and can easily remove the attached wall dirt. it can. 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 fine mist sprayed from the spraying means 112 can prevent the mist from entering even in a place that 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. Since it is difficult to control when the diameter is small, 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 the refrigerator room (about 5 ° C) in a refrigerator room filled with mist of each particle size and spray amount. After spraying mist for about 6 hours at each particle size, soaked in a soiled sample solution for 10 seconds, sprayed the soiling material, wiped off the soil after 24 hours, and how much the weight of the slice after wiping was compared to the initial value. It was measured whether it was reduced or not, and the removal rate of dirt was evaluated. The spray amount at this time was 0.014 g / h · l.

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

  As shown in FIG. 3, as a result of the experiment, the dirt removal rate has an inversely proportional relationship with the particle diameter, and the smaller the particle diameter, the higher the dirt removal effect. A dirt removal rate of about 50% is a sensory evaluation of the dirt removal rate, which is slightly dirty but not worrisome. The upper limit of the particle diameter within this range is 20 μm, and the removal rate is 70 The upper limit of the particle diameter to be about% was 0.5 μm. This is because the general unevenness of the resin is 20 to 30 μm, and if it is 20 μm or more, it becomes difficult for the mist to enter the fine concave portion of the resin, and it becomes difficult for the dirt to adhere to the mist particle or to be taken into the mist particle. The reason is considered. In addition, when the particle size is 0.5 μm and 20 μm, the smaller the particle size is 0.5 μm, the higher the diffusibility, so the contact frequency between the mist and the dirt on the inner wall surface increases, and the dirt removal rate also increases. It is done.

  Based on the above results, the mist particle size having a performance with a dirt removal rate of 50% or more in a mist spraying apparatus that generates mist by an ultrasonic method is 20 μm or less, and the mist having a performance with a dirt removal rate of about 50%. The particle diameter was 0.5 μm.

  Further, if estimated from this experiment, it is considered that the removal rate is further improved when the mist diameter is 0.5 μm or less. However, in the ultrasonic atomizer at the present stage, the mist particle diameter is reduced to 0.5 μm or less. When the particle size is reduced, water droplets are made finer using vibration energy of high frequency.Therefore, the higher the frequency, the more the number of vibrations tends to increase and the durability of the ultrasonic atomization method tends to decrease. In the stage, especially in refrigerators that require long-term durability among household electrical appliances with an average service life of about 10 years, this 0.5 μm is judged as the limit in terms of the durability of the ultrasonic atomizer, 0.5 μm was set as the lower limit of the optimum range when the refrigerator was applied.

  If an ultrasonic atomizer capable of ensuring long-term reliability can be realized even if a mist having a particle size of 0.5 μm or less is sprayed using an ultrasonic atomizer in the future, The lower limit of the appropriate range can be expanded (for example, up to about 1/10 of 0.05).

  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. The refrigerator in the experiment was a 250 liter refrigerator compartment.

  In this experiment, mist having a particle size of 0.5 μm was sprayed.

  From FIG. 4, the dirt removal effect is proportional to the amount of mist sprayed, and the greater the amount of spray, the higher the dirt removal rate. The lower limit at which the dirt removal rate is 70% or more is around 0.014 g / h · l. However, it was found that when the spray amount was 0.14 g / h · l or more, although there was an effect of removing dirt, excess water adhered to the inner wall surface of the cabinet and the food deteriorated in quality, which was inappropriate.

  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. Therefore, it is possible to provide a refrigerator in which a dirt reservoir for collecting dirt substances is provided at the lower end portion of the refrigerator wall surface in the vertical direction, and cleaning of the vertical wall surface is not required if only that portion is cleaned.

  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, since the water storage tank is provided, a sufficient amount of water can be replenished, and dirt can be more effectively prevented. 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. By coating the inside of the refrigerator with mist in this way, 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.

  Further, in the present embodiment, the spraying means includes the ultrasonic element and the filter. However, in the case where it is not always necessary to strictly manage the particle diameter, the configuration is made by using only the ultrasonic element. It will be simpler and a lower cost mist 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 refrigerating chamber according to Embodiment 2 of the present invention.

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

  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.

  FIG. 8 is a diagram showing characteristics of the antifouling effect in the refrigerator according to Embodiment 2 of the present invention with respect to the amount of mist sprayed.

  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 210 is provided in the lower part of the refrigerator compartment 102. The water replenishing means 210 is provided in the lower part of the refrigerator compartment 102, and is composed of a water storage tank 111 for storing water, a spraying means 212, and an air blowing means 113 for blowing mist generated by the spraying means 212 into the refrigerator compartment 104. Has been. Further, the spray means 212 is located inside the water storage tank 111, is positioned so that one end is immersed 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.

  Next, FIG. 7 is a diagram showing characteristics of the mist prevention effect in the refrigerator with respect to the particle size of the mist and the sensory evaluation value in the storage with respect to the particle size in the spraying means according to Embodiment 2 of the present invention. The experimental method is the same as that of the first embodiment. The refrigerator in the experiment was a 250 liter refrigerator compartment.

  The optimum spray water particle size was 0.003 to 0.5 μm. This is usually too large when the water particle diameter is 1 μm or more as in the first embodiment, and cannot penetrate into the pores of the resin, but the mist adheres to the inner wall of the refrigerator by the electrostatic atomization method. This is considered to be due to the fact that even when the thickness is about 0.5 μm, it adheres in such a way as to block the pores of the resin due to the charging of the mist. Moreover, when it becomes 0.5 micrometer or more, the removal rate of dirt will fall. Further, the soil removal rate at 0.001 μm where the water particle diameter was 0.003 μm or less was 25%. When the water particle diameter is 0.003 μm or less, the lifetime as the mist particles is shortened and disappears without reaching the inner wall surface of the refrigerator. Therefore, it is considered that the antifouling effect in the refrigerator is also lowered.

  Next, FIG. 8 is a diagram showing the characteristics of the antifouling effect in the refrigerator according to Embodiment 2 of the present invention with respect to the spray amount of the mist and the sensory evaluation value in the cabinet with respect to the spray amount. The experimental method is the same as that of the first embodiment. The refrigerator in the experiment was a 250 liter refrigerator compartment.

  From FIG. 8, there is an optimum spray amount of mist for the antifouling effect on the refrigerator wall surface, and the extent to which it feels sensually slightly soiled but not worried (stain removal rate of 50% or more) was set as the optimum range. The optimum spray amount was in the range of 0.0007 to 0.007 g / h · l. When the spray amount is 0.0007 g / h · l or less, the stain removal rate decreases as the spray amount decreases, and it is not at a level where the stain removal can be realized. When the spray amount is 0.007 g / h · l or more, the ozone concentration generated from the spray means becomes high and affects the human body. However, if an ozone decomposition device or ozone decomposition catalyst that can reduce the ozone concentration is added, the upper limit of the optimum range can be expanded (for example, up to about 0.07 g / h · l). It is. Further, if it becomes possible to provide an electrostatic atomizer capable of generating a large amount of spray while keeping the ozone concentration low in the future, similarly (for example, about 10 times 0.07 g / h · l). It is possible to expand the upper limit of the optimum range.

  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.

  Further, in this embodiment, the water supply means is provided in the refrigerator compartment, but by providing the water supply means in the vegetable room, the cold room, and the switching room, the walls of these storage rooms are coated with mist, and the refrigerator is cleaned. Can be held in.

(Embodiment 3)
In the refrigerator according to the third embodiment of the present invention, the mist spraying devices 120 and 302 in the third and fourth embodiments described above are used in combination. Thus, it was aimed to grasp an appropriate particle diameter and spray amount of mist without depending on the form of the apparatus. By these, the agrochemical removal effect by the mist spraying device, the freshening effect of the crops stored in the vegetable compartment 114, and the antifouling effect of the wall surface in the vegetable compartment 114 will be described from the viewpoint of the particle diameter of the mist and the spray amount.

  FIG. 9 is a diagram showing the correlation between the mist particle size and the spray amount and the respective effects in the third embodiment. From FIG. 9, it can be seen that the mist particle size and the spray amount according to Embodiments 3 and 4 and the respective effects have appropriate ranges, and the ranges differ from each other depending on the purpose.

  First, I will explain the resuscitation of vegetables. In order to increase the moisture content of vegetables, the mist to be sprayed cannot physically enter the vegetables unless the particle diameter is smaller than the pore diameter in the state where the pores are maximally opened. The pores are on the surface of the vegetables and regulate moisture. Moreover, according to the result of the experiment, when the light is not irradiated, the moisture content restoration rate is high if the particle diameter of the mist is not more than the cell gap width. That is, mist actively enters from the cell gap, and the moisture content restoring effect of the vegetable is increased. Conversely, if the mist diameter becomes too small, the contact frequency between the mist and the pores decreases, and the resuscitation rate of the vegetables decreases.

  On the other hand, the amount of mist sprayed needs to be equal to or greater than the amount that maintains the relative humidity in the vegetable compartment in equilibrium with the humidity inside the vegetable. However, if the amount of spray is too large, the quality of the vegetables will deteriorate due to water rot. The amount of spray needs to be less than the amount that does not cause such a situation.

  Further, a potential difference is generated between the electrostatically loaded mist and the vegetable, and the vegetable adhesion rate of the mist is increased. Therefore, in the case of the same particle size, the resuscitation rate of vegetables is higher when containing a large amount of electrostatically loaded mist even with a small spray amount.

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

  About the mist particle diameter, when it is the uneven | corrugated width of vegetables and it is a diffusible fine particle, an agrochemical removal effect is high. When the particle size is too small, the contact frequency with the pesticide decreases, and the removal rate decreases. On the other hand, as in the resuscitation of vegetables, the frequency of contact between the electrostatically loaded mist and the vegetables is high, so that the larger the proportion of the electrostatically loaded mist, the smaller the amount of spray that can be removed. In this case, it is not necessary to supply the mist to the inside of the vegetable as in the resuscitation of the vegetable, and the supply of the mist is limited to the vegetable surface. Therefore, the amount of spray required is less than vegetable resuscitation. Further, the magnitude of the removal effect depends on the amount of a substance having a decomposition ability such as ozone and OH radical in the mist rather than the spray amount. The number of radicals increases as the mist generated by the electrostatic atomization method becomes finer. Therefore, the pesticide removal effect becomes higher when the mist containing a large amount of electrostatic load is included.

  Next, the antifouling effect in the refrigerator will be described. If the water particles of the mist are evenly attached to the wall surface in the refrigerator, it is possible to prevent the dirt substance from directly attaching to the wall surface in the refrigerator. The antifouling effect in the refrigerator cabinet means such an effect. In this way, when the dirt substance adheres to the wall surface in the warehouse via 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.

  For confirmation of the antifouling effect, a dirt substance is sprayed on an ABS resin, which is a resin in a general refrigerator, in a storage chamber filled with a predetermined amount of mist with each particle size. After that, when the dirt is wiped off after a certain time, the range in which the dirt is not sensuously conscious is taken as an appropriate range.

  As shown in FIG. 9, fine particles having a particle diameter equal to or smaller than the uneven width of the internal resin and having diffusibility have a high antifouling effect. In addition, when the mist adheres to the inner wall surface of the container, the particle diameter that is visible as water droplets may cause dew condensation, which may cause the food quality to deteriorate. Therefore, the particle diameter of the mist to be sprayed needs to be a particle diameter at which the mist adhering to the wall surface becomes a water droplet at an invisible level. Moreover, the spraying amount is larger than the spraying amount for vegetable resuscitation and pesticide removal. This is because in order to exert the antifouling effect, it is necessary to uniformly adhere water particles to the wall surface and to spray a large amount of mist. When the mist is generated by the electrostatic atomization method, the number of radicals having a high oxidative degradation power increases as the particle diameter decreases, as in the effect of removing agricultural chemicals and the like. For this reason, it is considered that the oxidative decomposition ability of mist is increased, the frequency of contact with dirt is increased, and the effect of decomposing adhered dirt is enhanced. However, if the particle size is too small, the mist wall surface arrival rate is lowered, and the antifouling effect is lowered.

  As described above, various useful effects in the refrigerator can be obtained depending on the relationship between the particle diameter of the mist and the spray amount. That is, the convenience of the refrigerator is further improved by performing mist spraying that achieves a plurality of effects to be obtained.

  Next, an appropriate range of the mist particle diameter when the composite mist spraying apparatus is used will be described.

  FIG. 10A is a diagram showing the relationship between the dirt removal effect and the water particle diameter of the mist in the present embodiment. Note that this experiment is also the same experimental method as in the third embodiment, and the spray amount at this time is 0.03 g / h · L.

  As is clear from FIG. 10 (a), in order to make the dirt removal rate 50% or more, the mist particle diameter needs to be 0.003 μm or more and 20 μm or less. Fine mist particles having a mist particle diameter equal to or smaller than the uneven width of the inner wall surface and having diffusibility have a high dirt removing effect. Therefore, the mist particle size is preferably 20 μm or less. If the particle diameter becomes too small and less than 0.003 μm, the contact frequency with dirt is reduced and the removal rate is considered to be low.

  Next, an appropriate range of the mist particle diameter and the spray amount when the composite mist spraying apparatus is used will be described.

  FIG.10 (b) is a figure which shows the relationship between the dirt removal effect and mist spraying amount in this Embodiment.

  As is apparent from FIG. 10B, the effect of removing dirt increases as the amount of mist spray increases. In order to make the dirt removal rate 50% or more, it is necessary to control the spray amount to 0.0007 g / h · L or more. This lower limit is the same as the value obtained when the mist is sprayed by the electrostatic atomization method. That is, the lower limit is determined by the electrostatic atomization method.

  On the other hand, when the spray amount exceeds 0.14 g / h · L, although there is a dirt removing effect, excess moisture adheres to the inner wall surface of the warehouse, and the quality of the food is deteriorated.

(Embodiment 4)
FIG. 11 is a side sectional view of the refrigerator in the fourth embodiment of the present invention.

  FIG. 12 is a side sectional view of the vicinity of the ultrasonic atomizer of the refrigerator in the fourth embodiment of the present invention.

  FIG. 13: is a front view of the ultrasonic atomizer vicinity of the refrigerator in Embodiment 4 of this invention.

  FIG. 14 is a longitudinal sectional view of an ultrasonic atomizer for a refrigerator according to Embodiment 4 of the present invention.

  FIG. 15 is a functional block diagram according to the fourth embodiment of the present invention.

  FIG. 16 is a control flowchart in the fourth embodiment of the present invention.

  In FIG. 11, the refrigerator 221 is partitioned into a refrigerating room 223, a switching room 224, a vegetable room 225, and a freezing room 226 from above by a partition 222 having heat insulation properties. The refrigerator compartment 223 stores food and is cooled to 4 to 6 ° C. with a humidity of about 80% RH or more (when storing food). On the back surface of the refrigerator compartment 223, an internal partition 230 for separating the air passage 229 and the refrigerator compartment 223 is provided. The internal partition 230 is provided with an ultrasonic atomizer 301. Further, the internal compartment 230 in the refrigerator compartment is provided with an irradiating means 323 for irradiating light having a specific wavelength selected and a diffusion plate 324 for diffusing the light throughout the interior.

  In FIG. 12, there is an air passage 229 between the internal partition 230 and the main body outer wall 202. For example, the air generated by the cooler 242 is transferred to each storage room, or air is heat-exchanged from each storage room. Is provided for transporting to the cooler 242. Here, an ultrasonic atomizer 301 is incorporated in the internal partition 230. The internal partition 230 is mainly made of a heat insulating material such as polystyrene foam, and its wall thickness is about 30 mm, but the wall thickness of the back surface of the stored water holding means 304 is 5 mm to 10 mm. In the stored water holding means 304, a water collecting plate 321 is installed inside the warehouse. For example, a heating means 328 such as a heater made of nichrome wire is brought into contact with one surface of the water collecting plate 321, and a cover member for forming a ventilation air passage 317 such as a BOX fan and a circulation air passage 307 inside the cabinet. 306 is installed. In addition, an ozone generator is installed on the top of the cabinet.

  Further, in FIG. 13, the cover member 306 is provided with a first circulation air passage opening 308 and a second circulation air passage opening 309 related to the circulation air passage 307. Further, the water collecting plate 321 is provided with temperature detecting means 327 for detecting the temperature of the surface of the water collecting plate 321.

  Further, in FIG. 14, the ultrasonic atomizer 301 includes a horn 310 and a piezoelectric element 311, the horn 310 is processed into a substantially conical shape by cutting or the like, and the spray tip 310 a of the horn 310 is at least inside the warehouse. It is provided to open into the storage chamber. A flange portion 312 is formed integrally with the horn 310 on the piezoelectric element 311 side of the horn 310. Further, the horn 310 and the piezoelectric element 311 are bonded and fixed, and the vibration generated by the piezoelectric element 311 is amplified so as to have the maximum amplitude at the tip of the horn. Moreover, the ultrasonic atomizer 301 is attached to the connection part 305 of a refrigerator or its attachment member by using the flange part 312 as an attachment position. At this time, the amplitude of the ultrasonic vibration is set so as to become a node of the amplitude at the flange portion 312. By using the flange portion 312 as the connection portion 305 to the refrigerator, the ultrasonic vibration is reduced to the refrigerator main body. , And noise caused by vibrations of refrigerator parts and shelves provided in the cabinet can be reduced.

  The horn 3310 is made of a material having high thermal conductivity, and examples thereof include metals such as aluminum, titanium, and stainless steel. In particular, it is preferable to select a material mainly composed of aluminum from the viewpoint of light weight, high thermal conductivity, and amplitude amplification performance during ultrasonic transmission. In order to extend the life, it is desirable to select a material mainly composed of stainless steel.

  The amplitude of the ultrasonic vibration is ¼ between the amplitude at the flange portion 312 and the abdominal portion at the tip of the horn 310, and between the flange portion 312 and the spray tip 310 a of the horn 310. It is set to vibrate at a wavelength. In this way, the vibration node is fixed to the refrigerator main body, and the position of the quarter wavelength of the frequency to be obtained from the position is set as the abdomen of the amplitude, thereby realizing the miniaturization of the horn 310 while obtaining high output. Can do. In recent refrigerators for home use, there is a tendency to improve the user-friendliness by increasing the internal capacity while maintaining the conventional external dimensions. In such a type of refrigerator, the heat insulating wall is highly insulated. By making it easier, it becomes thinner and the equipment storage space etc. on the back side becomes more compact, but by providing a high output and small horn in this way, extension of the spray device into the warehouse was prevented In the above, a sufficient amount of generated mist can be obtained, and the convenience of the refrigerator can be improved.

  The length of the horn 310 is determined by the atomized particle diameter of the generated mist, the oscillation frequency of the piezoelectric element 311 and the material of the horn 310. For example, when the atomized particle diameter is about 10 μm, the length B of the horn 310 is about 6 mm when the material of the horn 310 is aluminum and the oscillation frequency of the piezoelectric element 311 is about 270 kHz. When the atomized particle diameter is about 15 μm, the length B of the horn 310 is about 11 mm when the material of the horn 310 is aluminum and the oscillation frequency of the piezoelectric element 311 is about 146 kHz. A series of these theoretical calculation values is summarized in Table 1.

  The refrigerator 221 includes a refrigeration cycle such as a compressor 241, a condenser (not shown), a decompression device such as an expansion valve and a capillary tube, and an evaporator 242 in order to cool the refrigerator. In some cases, isobutane, which is a flammable refrigerant with a low global warming potential, is used as a refrigerant for the refrigeration cycle from the viewpoint of global environmental conservation.

  About the refrigerator comprised as mentioned above, the operation | movement / effect | action is demonstrated below.

  In the case of the refrigerator 221, the cold air heat-exchanged by the cooler 242 is distributed to the refrigerating room 223, the switching room 224, the refrigerating room 223, the freezing room 226, the ice making room 227, etc. by a stirring fan (not shown), In general, an ON / OFF operation is performed so as to maintain a predetermined temperature. The refrigerating room 223 is adjusted to be 4 ° C. to 6 ° C. by ON / OFF operation such as distribution of cold air and heating means, and in general, there are many rooms that do not have an internal temperature detection means.

  In addition, the refrigerator compartment 223 is highly humid due to the evaporation of moisture from food and the invasion of water vapor by opening and closing the door. The internal partition 230 is configured to be thinner than other portions because a certain amount of cooling capacity is required. Here, if the surface temperature of the water collecting plate 321 is set to be equal to or lower than the dew point temperature, water vapor in the vicinity of the water collecting plate 321 is condensed on the water collecting plate 321, and water droplets are reliably generated.

  Specifically, the temperature detection means 327 installed on the water collecting plate 321 grasps the surface temperature state, the control means 314 performs ON / OFF control or duty control on the air blowing means 317 and the heating means 328, and the water The surface temperature of the collecting plate 321 is adjusted to a dew point temperature or less, and moisture contained in the high-humidity air sent from the inside by the blower 317 is condensed on the water collecting plate 321.

  In particular, although not shown here, if the inside temperature detecting means 325 or the inside humidity detecting means 326 is inside the warehouse, the dew point temperature can be strictly determined according to changes in the inside environment by a predetermined calculation. Can do. Even if ice or frost is formed on the surface of the water collecting plate 321, the heating means 328 can raise the surface temperature of the water collecting plate 321 to the melting temperature, so that water can be generated appropriately.

  Here, when the air blowing means 317 is operated, the surface temperature of the water collecting plate 321 increases due to the influence of the air in the vegetable compartment 25, and decreases when the air blowing means 317 is stopped. When the wall thickness is 10 mm or more, the surface temperature of the water collecting plate 321 becomes equal to or higher than the dew point temperature even when the air blowing means 317 is in operation and the heating means 328 is OFF, and the amount of condensation cannot be adjusted. On the other hand, when the wall thickness is 5 mm or less, the heating means 328 is always in an ON state, resulting in poor energy efficiency. Therefore, the energy of the heating means 328 can be minimized while controlling the surface temperature of the water collecting plate 321 by setting the thickness of the interior partition 30 on the back surface of the water collecting plate 321 to 5 to 10 mm.

  Moreover, in order to promote dew condensation, it is necessary to circulate the air in the refrigerator compartment 223 with higher humidity. Therefore, air is taken in by the air blowing means 317. For example, after the high-humidity air is taken in from the second circulation air passage opening 309 by the blower 317 and condensed on the water collecting plate 321, the air is discharged from the first circulation air passage opening 308 into the chamber. Condensation is promoted by circulating the air in the refrigerator compartment 223.

  Water droplets condensed on the surface of the water collecting plate 321 gradually grow, flow downward without using power such as a pump due to its own weight, and gather near the ultrasonic atomizer 301. The collected condensed water is supplied to the tip of the horn 310 by the water supply means 303.

  The water supplied to the tip of the horn 310 is sprayed into the refrigerator compartment 228 as a mist having a small particle diameter by the vibration of the ultrasonic transducer 311.

  The horn 310 generates heat due to vibration near the tip of the horn 310. However, since the horn 310 is a highly heat conductive material, it also serves to conduct heat to the entire horn 310.

  Further, at least the spray tip 310a of the horn 310 is provided in a storage chamber, and can spray mist particles directly on the store, and the distance between the spray tip 310a and the vegetable Compared to the case where mist is sprayed outside the storage chamber and then fed into the storage chamber, for example, the vaporization of mist particles can be prevented and the flow velocity in the floating state can be increased. The mist adhesion rate can be further increased.

  When the piezoelectric element 311 is driven, each part vibrates as shown by a solid line A in FIG. The flange portion 312 side of the horn 310 becomes a node portion of the sound wave propagating through the ultrasonic atomizer 301, and the flange portion 312 of the horn 310 corresponding to the node portion, for example, directly with the internal partition 230 or indirectly through an attachment member. Connected and installed. Since it is connected at the node of the propagating sound wave, the vibration when generating the ultrasonic wave propagates to the main body of the refrigerator 221, and the parts of the refrigerator 221 can vibrate, and noise associated with these vibrations can be prevented. Even when the refrigerator is provided with an atomizing device of a type that generates mist by vibration energy, a refrigerator that suppresses noise and vibration can be provided.

  Moreover, if the length of the front-end | tip of the horn 310 and the flange part 312 has a 1/4 wavelength, the full length of the ultrasonic atomizer 301 can be shortened. Furthermore, compared to the case where there are a plurality of abdominal portions between the tip of the horn 310 and the flange portion 312, vibration energy loss can be greatly reduced, and the power required for vibration can be suppressed.

  In this way, the vibration node is fixed to the refrigerator body, and the position of the quarter wavelength of the frequency to be obtained from it is set as the abdomen of the amplitude, so that the power required for vibration is suppressed and low input and high output are achieved. Thus, it is possible to further reduce the size of the horn 310.

  In the ultrasonic atomization apparatus of the present invention, the piezoelectric element 311 using the electrostriction phenomenon using electric energy is used as the vibrator, but the magnetostriction vibration using the magnetostriction phenomenon using magnetic energy as the vibrator. Even when a child is used, water droplets can be made finer by using high-frequency vibration energy, so that a high voltage is not required when generating a fine mist, and a fine mist can be obtained at a low voltage. Therefore, it is possible to further improve the safety associated with the occurrence of mist and to save energy.

  In this way, the type of atomizer that generates mist by vibration energy uses fine vibration energy to atomize the water droplets, so it does not require high voltage when generating fine mist, and is fine at low voltage. Since mist can be obtained, safety associated with mist generation can be further increased and energy saving can be achieved. In addition, since water particles are not decomposed by electrolysis or the like, depending on how vibration energy is applied, the water components can be misted as they are without changing the water components. For example, alkaline ion water, negative ion water, etc. Even if functional water to which some component is added as compared with pure water is used, it becomes possible to mist the component as it is, and it is possible to supply arbitrary water according to the needs of the user as mist.

  Further, among the atomizers that generate mist by vibration energy, it is a frequency band in which noise caused by vibration generally referred to as ultrasonic waves is inaudible to human ears as stationary sound, as in this embodiment ( By using a frequency (for example, 20,000 Hz or more), even when applied to a refrigerator for home use, noise caused by vibration cannot be heard by the human ear as a steady sound. A provided refrigerator can be provided.

  Next, the functional block diagram of FIG. 15 will be described. In order to adjust the operation of the irradiating means 323 and the heating means 328 and the air blowing means 317 operated to adjust the operation of the ultrasonic atomizing apparatus 301 and the amount of water supplied to the ultrasonic atomizing apparatus 301, the water collecting plate temperature detecting means 327, the vegetable room temperature detection means 325, the vegetable room humidity detection means 326, and the information signal of the door open / close detection means 330 are input to the control means. For example, when it is detected that the internal temperature is 5 ° C., the internal humidity is 90%, and the water collecting plate surface temperature is 4 ° C., the control unit 314 controls the operation of the ultrasonic atomizer ON / OFF and the heating unit 328. decide. That is, in this case, the surface temperature of the water collecting plate needs to be cooled below the dew point temperature. For example, the heating means is turned off or the input is reduced, the rotation speed of the compressor is increased to lower the temperature of the cool air, or the blowing means Control is performed to reduce the rotation speed. Further, by operating the ultrasonic atomizer 301 only when the door opening / closing detection means 330 detects that the door is closed, mist leakage to the outside when the door is opened / closed is prevented.

  Next, the control flow diagram of FIG. 16 will be described.

First, if the detected temperature is within the range of t _A ° C and t _B ° C in which the surface temperature t ° C. is determined in advance by the water collecting plate surface temperature detecting means 327 in step 21, it is determined that the dirt is removed. The atomizer 301 is operated and mist is sprayed on the storage room. Then integrated operating time T _A of the ultrasonic atomization apparatus 301 in step 23 if above T _1, to operate the ozone generator. If cumulative operation time T _A in step 25 by the ultrasonic atomization apparatus 301 to T ₂ or more, and terminates the mist spray, the ozone generator also in the OFF state at the same time. In step 27 the stop time of the ultrasonic atomization apparatus 301 is returned to the initial value a timer T _A, the T _B in step 28 if the T _3, again detecting a water collection plate surface temperature.

  As described above, in the present embodiment, the heat insulation box having the heat-insulated compartments and the ultrasonic atomizing device as the spraying means for spraying the liquid are provided, and the low-temperature storage chambers are provided with a low temperature. By using a wind path to convey cold air, cooling the water collection plate for supplying water to the ultrasonic atomizer by heat conduction from the air path side, and adjusting the temperature of the water collection plate below the dew point Thus, moisture in the air can be reliably generated, and water can be supplied to the tip of the vibrator of the ultrasonic atomizer by water supply means or the like.

  In this embodiment, if the spray means is an ultrasonic atomizer and the supply of water is sufficient, the spray amount can be sufficiently secured, and therefore the spray amount is adjusted by ON / OFF operation. In addition, the operation time in actual use can be shortened, and the lifetime reliability of components and the like is improved.

  In the present embodiment, since the atomizing means is an ultrasonic atomizing device, a sufficient amount of atomization can be secured, so that dirt and the like adhering to the inner wall surface can be lifted and removed with an extremely small amount of water, so that water can be saved.

  In the present embodiment, since the atomizing means is an ultrasonic atomizer, ozone is not generated when mist is generated, and only OH radicals are generated. The contents can be simplified.

  Moreover, when the atomized particle diameter is 4 μm to 20 μm, the particles can efficiently enter the fine concave portion of the inner wall surface, and the dirt can be removed until it is subdivided.

  In the present embodiment, the spraying amount of the spraying means is 0.014 to 0.14 g / h · l, so that the necessary amount is sprayed for removing the dirt, and the effect of removing the dirt and the food It is possible to achieve both storability such as moisture retention.

  In the present embodiment, ozone gas generated by discharge is dissolved in the sprayed mist. However, the same effect can be obtained even if the stored water is ozone or functional water rich in reactivity.

  Further, in the present embodiment, a high voltage is required to atomize mist even when a flammable refrigerant such as isobutane or propane is used as a refrigerant in the refrigeration cycle by using an ultrasonic atomizer. Therefore, it is not always necessary to devise special arrangements for the arrangement of the components of the refrigeration cycle in the event that a flammable refrigerant leaks from the refrigeration cycle. Need not be provided. Therefore, applying an atomizing device that generates mist by vibration energy to refrigerators that use flammable refrigerants can further improve the safety of refrigerators for home use. It is an effective means.

  In the present embodiment, the water collection plate is provided in the storage chamber, so that the amount of dew condensation can be adjusted by the heating means and the air blowing means, and at the same time, the internal humidity can be adjusted by changing the temperature of the water collection plate. .

  Further, in the present embodiment, an ultrasonic atomizing device that includes a horn formed in a substantially conical shape and a piezoelectric element, and is integrated by adhering the piezoelectric element to one end face of the horn is stored in the storage chamber. It becomes possible to apply the ultrasonic atomizer with a small size and a low input to the refrigerator. In particular, in recent years, in the refrigerator of the type that has improved the user-friendliness by increasing the internal capacity with the mainstream external dimensions being the same as before and further saving energy, it is necessary to provide a small horn in this way. In addition to preventing the atomization device and the spray device from extending into the cabinet, it is possible to save energy with a low-input and high-output atomization device while preventing a reduction in the internal capacity of the refrigerator. Usability can be improved. There are few installation restrictions and it can give a design freedom. In addition, since the input is low, power consumption can be reduced and the control board can be reduced in size and cost.

  Moreover, since the emitted-heat amount of ultrasonic atomizer itself can be suppressed, the temperature rise in a storage chamber can be suppressed. In addition, abnormal heat generation particularly when water shortage occurs can be suppressed, so that the life of the ultrasonic atomizer is prolonged and the reliability is improved. Furthermore, since it is used in a low-temperature atmosphere called a refrigerator, heat generation is suppressed and the life of the ultrasonic atomizer is extended.

  In addition, since water is supplied to the tip of the horn efficiently and stably by providing the water supply means, it is always stably sprayed from the ultrasonic atomizer, and the storage room space can be maintained at high humidity. it can. Moreover, since water can be prevented from being lost at the horn tip by stably supplying moisture to the horn tip, the life of the ultrasonic atomizer is prolonged and the reliability is improved.

  In addition, since the water supply means is provided in the vicinity of the stored water holding means, water is replenished from the stored water holding means to the tip of the horn by the water supply means. High humidity can be maintained. Further, since the stored water holding means and the water supply means are located in the vicinity, the configuration of the water path from the stored water holding means to the horn tip can be made compact and simplified, and the degree of freedom in design is improved.

  Further, the stored water holding means has means for condensing moisture in the air in the storage chamber as water collecting means, and the condensed water generated by the dew condensation means is supplied by supplying the condensed water to the tip of the horn by the water supply means. Water can be collected in the storage water holding means, and the condensed water collected can be constantly supplied to the tip of the horn by the supply means, so that mist can be efficiently sprayed in the storage space and the storage room space is maintained at high humidity. can do.

  In addition, since the horn is a highly heat-conductive material, the horn tip diffuses heat throughout the horn and the storage space is in a low-temperature environment, so the temperature rise of the ultrasonic atomizer itself can be suppressed. Longer service life and improved reliability.

  In addition, the horn tip is near the vibration abdomen, the flange formed on the piezoelectric element bonding surface side of the horn is near the vibration node, and the flange is connected directly or indirectly to the refrigerator body. This makes it possible to efficiently atomize the water replenished to the horn tip at the abdomen where the amplitude of vibration is large, that is, the tip of the horn, and the amplitude is small at the vibration node, ie, the flange formed on the horn. The vibration transmission from the connection part directly or indirectly connected to the refrigerator can be reduced.

  In addition, the ultrasonic atomizer has a structure in which the length of the horn tip and the flange portion vibrates in a quarter wavelength mode, so that the tip of the horn that becomes the atomization surface and the horn that becomes the connection portion are formed. Since there is no single abdomen and multiple nodes between the flange part, the horn can be miniaturized, and energy dispersion and attenuation can be reduced, so that the efficiency can be improved. Moreover, since it can be reduced in size, there are few installation restrictions, a design freedom can be given, and a storage space can be enlarged.

  Moreover, since the horn becomes small by setting the length of the horn to 1 mm to 20 mm, the refrigerator design can have a degree of freedom and the storage space can be enlarged.

  In addition, by providing a cover member around the ultrasonic atomizer, it becomes impossible to directly touch, so that safety can be improved.

  In the second embodiment, the ultrasonic atomizer has been described using a horn formed in a substantially conical shape. However, the ultrasonic atomizing device may have a shape that amplifies the amplitude of vibration at the tip instead of a substantially conical shape. The same effect can be obtained. For example, a tapered shape from the piezoelectric element side toward the tip can be formed into a substantially rectangular shape at the tip. This increases the area over which the mist is sprayed compared to the circular shape, so that the spray range is expanded and the diffusibility is improved.

(Embodiment 5)
FIG. 17 is a side sectional view of the vicinity of the spraying means in the fifth embodiment of the present invention.

  In FIG. 17, the partition 222 of the refrigerator 221 is provided with a water storage tank 315 and an electrostatic atomizer 304 as a spray means from the refrigerator door side toward the interior partition inner surface, and the stored water is stored in the water storage tank 315. 316, and a cover member 501 having a hole is formed around the electrostatic atomizer 304 so that food and people do not touch it.

About the refrigerator comprised as mentioned above, the operation | movement / effect | action is demonstrated below.
The water storage tank 315 is installed on the door side front surface of the vegetable room so that people can easily attach and detach, and stores water 316 to be supplied to the spraying means. A water supply means 521 and a water supply path 522 are provided to supply the stored water 316 to the electrostatic atomizer 304 that is a spray means. The water supply means 521 is, for example, a gear pump, a piezoelectric pump, a capillary, or the like, and supplies water to the tip of the application electrode of the electrostatic atomizer 304 and its surrounding water retaining material. Here, the amount of water supply is approximately equal to the amount sprayed into the refrigerator compartment. For example, when it is determined that spraying is necessary in the refrigerator compartment, first, the water supply means 521 is operated to supply water to the tip of the application electrode using the water supply path. Here, it is confirmed that there is water at the tip of the application electrode 306, a high voltage is applied between the application electrode and the counter electrode, fine mist is generated, and sprayed into the storage chamber.

  In addition, the electrostatic atomizer 304 is embedded in a recess 222a provided in the partition 222 on the top surface part, and is installed in the back part of the top surface of the storage room, and a cover member 501 is installed around, for safety. keeping. At this time, for example, the bottom surface portion 501a of the cover member 501 is provided above the bottom surface 315a of the water storage tank so as not to affect the movable operation of the vegetable container 228 movable back and forth by the drawer-type door. Has been made.

  Further, by generating fine mist by the electrostatic atomization method, a small amount of ozone is generated at the same time as the fine mist is generated, and is immediately mixed with the mist to form a low concentration ozone mist. In addition, by electrostatically adding to the mist, water molecules in the mist are radicalized to generate OH radicals. In addition to the oxidizing power of ozone, the charged interior is maintained by the oxidizing power of OH radicals. Electrically adheres to the wall surface, penetrates into the minute recesses on the inner wall surface of the cabinet, lifts the food stains by the internal pressure energy of the fine mist, and oxidatively decomposes or removes it by the oxidative decomposition of ozone. It also has the effect of entering a fine recess on the inner wall surface of the cabinet, chemically reacting with food stains, enhancing the hydrophilicity of the stains, and taking them into the mist for decomposition and removal.

  As described above, in the present embodiment, the water storage tank 315 is provided on the door side, that is, the front side as viewed from the user, in the partition 222 located on the lower surface of the refrigerator compartment 223 of the refrigerator. In the case of a detachable type, it is easy to exchange, add, and clean water, improving usability. Moreover, by providing the electrostatic atomizer 304 in the back | inner side rather than the water storage tank 315, it can prevent that a user touches especially the spraying front-end | tip part 306a of a spraying means, and can improve safety | security further. Furthermore, the spraying device can be seen from the user by being provided behind the lower end portion 304a water storage tank of the electrostatic atomizer 304 as the spraying means and above the bottom surface which is the lower end surface of the water storage tank. Since it is difficult, it is possible to provide a spraying device in the storage room without impairing the aesthetics of the storage room, and to make it difficult for the user to touch the electrostatic atomizer 304, thereby improving the safety of the user and It is possible to prevent a decrease in reliability due to the addition of external force to food or human contact with the means.

  Further, in order to further suppress the protrusion of the spraying means into the chamber, the electrostatic atomizer 304 is embedded in a recess 222a provided in the partition 222 on the lower surface, thereby further reducing the volume in the chamber. Therefore, it is possible to provide spraying means in the storage chamber without affecting the food storage.

  Furthermore, by providing the cover member 501 to the electrostatic atomizer 304 that is a spraying means, it is possible to further prevent food or people from coming into contact.

  Even in the case where the spray member is provided with the cover member 501, in the present embodiment, the lower end portion 501a of the cover member 501 is disposed above the bottom surface 315a, which is the lower end portion of the water storage tank. It is possible to improve the aesthetics and safety of the storage room provided with the spraying means while preventing the reduction of the internal volume.

  In this embodiment, the water storage tank 315 is detachable. However, the water storage tank 315 is not a removable type but is a fixed type, for example, a storage generated by using tap water or moisture in a refrigerator. Even if it is a spraying means of the type that automatically supplies water etc., the electrostatic atomizer is provided behind the water storage tank as described above, so that the user can be prevented from touching the spraying means and be safe. In addition, the spray device is difficult to see from the user because it is provided on the back side of the water tank and above the bottom surface, which is the lower end surface of the water tank. The storage room can be equipped with a spraying device without impairing the aesthetics of the product, and since it is more difficult for the user to touch the spraying means, the safety of the user is improved, and food or human contact with the spraying means is improved. Low reliability due to external force The same effects that can be prevented.

  In this embodiment, the spraying means is the electrostatic atomizer 304. However, even if another type of spraying means such as an ultrasonic atomizer is used, the refrigerator is arranged according to the arrangement relationship between the water storage tank 315 and the spraying means. Since the above-mentioned effects relating to user convenience and safety improvement can be obtained in the same manner, the same effects can be obtained even when other types of spraying means are used.

  In the present embodiment, the humidity in the storage chamber is increased by the electrostatic atomizer 304 to ensure the freshness, so that the freshness is improved by the fine mist generated from the applied electrode, and at the same time, a small amount of ozone and OH radicals. For example, food stains adhering to the inner wall surface of the refrigerator can be easily removed by an oxidative decomposition reaction, or can be made difficult to adhere.

  Further, in the present embodiment, by making the applied electrode more humid, in particular, since the air discharge between the applied electrode and the counter electrode is suppressed, the ozone concentration can be reduced, even when applied to a household refrigerator or the like. The safety of the user can be ensured.

  In this embodiment, since the electrostatic atomizer 304 is embedded in the recess 222a provided in the partition 222, the thickness of the heat insulating material is made thinner than other portions, so that the tip of the application electrode is cooled. The necessary applied electrode can be cooled.

  In the present embodiment, after the operation of the water supply means, the spraying device is driven and a high voltage is applied between the application electrode and the counter electrode, so that generation of ozone due to air discharge can be suppressed and mist can be generated safely. .

  In the present embodiment, the spraying means is the electrostatic atomizer 304. However, in the ultrasonic atomizer in which the spraying device heats up, particularly when the spray tip is dried, the reliability of the sprayer may be lowered. However, by driving the spraying device after the operation of the water supply means in this way, drying of the spray tip can be prevented, and the reliability of the spraying device can be improved.

(Embodiment 6)
FIG. 18 is a side sectional view of the vicinity of the spraying means in the sixth embodiment of the present invention.

  In FIG. 18, a water storage tank 315 and an ultrasonic atomizer 401 are provided from the refrigerator door side toward the interior partition inner surface. The bottom surface of the water storage tank 315 is inclined, and water supply adjusting means 524 is configured at the bottom of the back surface.

  About the refrigerator comprised as mentioned above, the operation | movement / effect | action is demonstrated below.

  The water tank 315 is installed on the front side of the vegetable room door so that people can easily attach and detach it, and stores tap water, condensed water, and the like. Here, the bottom of the water storage tank 315 is inclined toward the back of the refrigerator, and the end of the poured water is devised so as to be on the back side. Further, a water supply adjusting means 524, for example, an on-off valve or the like is provided on the bottom surface on the back side, and water is supplied to the mist generating portion of the ultrasonic atomizer 401 which is a spray means only when opened.

  As described above, in the present embodiment, usability is improved by providing the water storage tank 315 on the door side and the ultrasonic atomizing device 401 on the back side of the water storage tank 315.

  Moreover, in this Embodiment, the water of the water storage tank 315 can be used efficiently by inclining the bottom face of a water storage tank to the spraying means side.

  In the present embodiment, the provision of the water supply adjusting means makes it possible to supply an appropriate amount of water to the spraying means.

  In this embodiment, the water tank is fixed to the partition, but a detachable water tank may be used. This facilitates easy replacement, addition, and cleaning of water and improves usability.

(Embodiment 7)
FIG. 19 is a side sectional view of the refrigerator in the seventh embodiment of the present invention.

  In FIG. 19, the refrigerator 100 is partitioned into a refrigerator compartment 132, a switching chamber 133, a vegetable compartment 134, and a freezer compartment 135 from above by a partition plate 116. An ice-making water storage tank 119, which is a water storage tank, is provided on the rear surface of the refrigerator compartment 132. A water supply path 120 is led from the ice-making water storage tank 119 to an ice making chamber (not shown) and the refrigerator compartment 132 to supply water. Supply. In this way, the ice-making water storage tank and the tank for holding the water to be supplied to the mist spraying unit are combined, and the water supply path from these tanks is a single path that is branched in the middle of the ice making room and the vegetable room. Supply water to both rooms. In addition, a water supply means 121 is provided on the upper surface of the refrigerator compartment 132. The water replenishing means 121 is provided on the upper surface of the refrigerating chamber 132 and diffuses the mist generated by the water storage tank 122 that is a reserved water holding means for reserving water, the spraying means 124, and the spraying means 123 into the refrigerating chamber 132. It is comprised from the ventilation fan 129 which is a spreading | diffusion means. Moreover, the spray means 123 is located inside the water storage tank 122 and includes an ultrasonic element 125 that atomizes water by an ultrasonic method. In addition, the stored water 124 in the water storage tank 122 is supplied from the water supply path 120 and stored in the water storage tank 122.

  About the mist production | generation apparatus of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the water stored in the ice-making water storage tank 119 is supplied into the water storage tank 122 via the water supply path 120 and stored as the stored water 124.

  Next, the operation of the water supply means 121 is started. First, the stored water 124 is sprayed with mist atomized by the ultrasonic element 125 which is the spraying means 123. The fine mist in the water storage tank 122 is sprayed as mist in the refrigerator compartment 132 by the blower fan 129.

  As described above, in the present embodiment, as the water supply means to the water storage tank, water is supplied from the ice-making water storage tank to the water storage tank using the water path. Since water can be supplied to the means and the water storage tank is provided in a separate storage room from the refrigerator compartment, it does not affect the internal volume of the refrigerator compartment and therefore does not affect the amount of food stored. In addition, since the tank where the user needs to supply the stored water from the outside becomes one for ice making and mist spraying, the user's stored water is compared to the case where the mist storage tank is provided in a separate tank. It is possible to save the trouble of supplying the water and to reduce the possibility of running out of water in the water tank.

  In the present embodiment, the stored water holding means is a water storage tank, and the stored water supplied from the outside is held. However, the stored water is not necessarily supplied from the outside, but stored in some way. It may be one that extracts and holds the moisture contained in the indoor air, and the defrosted water in the refrigerator or the dew condensation water in the refrigerator can be used without supplying the stored water from the outside. As long as the stored water can be secured, it is possible to provide a refrigerator that does not require the trouble of replenishing moisture from the outside and has improved usability.

  In this embodiment, the water supply path to the water storage tank is sucked up from the water storage tank through one path, and then the water supply path is branched to supply water to both the ice-making room and the refrigerator room. Water can be supplied to both chambers with a small and simple configuration.

  In this embodiment, the water storage tank is also used as an ice-making water storage tank, and the water supply path from these tanks is a single path, and it is branched in the middle to supply water to both the ice-making room and the vegetable room. However, the water storage tank may also be used as a water storage tank for ice making and may be provided with independent water supply paths for the ice making room and the refrigeration room. For example, it is possible to supply water arbitrarily even when water supply is required at the same time in both chambers, and tanks that require the user to supply stored water from outside are for ice making and mist spraying. As a result, it is possible to save the user from having to supply the stored water and to reduce the possibility of the water tank running out of water, compared to the case where the water tank for mist is provided in a separate tank. Is possible.

  Further, in the present embodiment, by disposing the mist spraying device on the back side of the lower surface of the refrigerator compartment, the water supply path can be configured on the back side of the refrigerator even when a water storage tank is provided also as a water storage tank for ice making. For example, even when the water supply path is removed and cleaning is possible, the water supply path is short and can be made a simple path such as a substantially vertical shape. A highly reliable water supply path can be provided.

(Embodiment 7)
FIG. 20 is a side sectional view of the refrigerator in the seventh embodiment of the present invention.

  FIG. 21 is a front sectional view of the refrigerator in the same embodiment.

  FIG. 22 is a cross-sectional view of the main part showing the AA cross section in FIG.

  FIG. 23 is a cross-sectional view of a principal part showing a BB cross section in FIG.

  FIG. 24 is a graph showing the particle size distribution ratio of the sprayed mist in the same embodiment.

  20, 21, 22, and 23, the heat insulating box 17 of the refrigerator main body 2 has storage rooms 18, 19, and 20, and the front openings thereof are doors 21, 22, 23 is closed so that there is no inflow of outside air.

  A circulation duct 24 is provided on the back and bottom surfaces inside the storage chamber 18, and a circulation air passage 25 is formed between the heat insulation box 17. In the circulation air passage 25, a spraying means 26 for spraying mist is provided at a portion corresponding to the back surface of the storage chamber 18, and a diffusing means 27 is disposed above the spraying means 26. A plurality of discharge ports 28 are provided at the upper part of the vertical surface of the circulation duct, and a plurality of suction ports 29 are provided at the bottom surface.

  The mist circulation means 30 is constituted by the circulation air passage 25, the circulation duct 24 constituting the circulation air passage 25, the discharge port 28 and the suction port 29 provided in the circulation duct 24, and the diffusion means 27. The selection means 31 for selecting the particle diameter of the mist is composed of a diffusion means 27 and a spray means 26.

  Below the spraying means 26, a drain 32 for discharging excess water from the circulation air passage 25 to the outside of the heat insulating box 17 is provided.

  Temperature sensors 33 and 34 are provided on the top surface of the storage chamber 18 and the bottom of the circulation duct 24, respectively. The storage room 18 is partitioned by a partition shelf 35 for storing food.

  A heater 38 for heating the lower part of the storage chamber 18 is provided at the bottom of the circulation duct 24.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  Above and below the storage chamber 18, storage chambers 19 and 20 set in a temperature range lower than that of the storage chamber 18 are arranged, and the storage chamber 18 is naturally cooled by these storage chambers 19 and 20.

  When the door 21 is opened and food is put in the partition shelf 35 and then the door 21 is closed, the door opening detection means (not shown) detects the closed state, and the spraying means 26 starts spraying mist. The sprayed mist is lifted upward by the diffusion means 27 disposed above the spray means 26, and diffused and sprayed into the storage chamber 18 through the discharge port 28.

  As the spraying means 26, for example, water sprayed by atomizing water may be used, and the particle diameter of the sprayed mist is distributed as shown in FIG. In order to spread mist evenly in the storage chamber 18, as one means for that, the mist staying time in the storage chamber 18 is made as long as possible so that diffusion by circulation of air can be performed reliably. Can be considered. If it is intended to extend the time that the mist stays in the storage chamber 18, the particle size needs to be relatively small. In FIG. 24, for example, water particles having a predetermined particle diameter X or less corresponding to the desired effect may be taken out and sprayed by diffusion.

  As for the mist sprayed by the spraying means 26, those having a particle diameter of X or more fall downward due to their own weight, and those having a relatively light particle diameter of X or less rise by the diffusion means 27. . Thereby, it becomes possible to selectively take out mist particles having a certain diameter or less. The target particle size X can be freely set, and can be adjusted by the operating degree of the spraying means 26, the operating degree of the diffusing means 27, and the distance between the spraying means 26 and the diffusing means 27. This operating degree refers to, for example, the vibration frequency when an ultrasonic generator is used for the spraying means 26 and the fan rotation speed when a blower fan is used for the diffusing means 27. Further, the mist having a particle diameter X or more dropped downward is discharged from the drain 32 to the outside of the storage chamber 18.

  Since the discharge port 28 is located between the partition shelves 35, the mist sprayed into the storage chamber 18 from the discharge port 28 can pass through the partition shelf 35 and reach all of the storage chambers 18.

  A plurality of suction ports 29 are provided on the bottom surface of the storage chamber 18, and mist in the storage chamber 18 passes from the discharge port 28 to the lower portion of the storage chamber 18. Therefore, the mist can be distributed throughout the storage chamber 18 without stopping in the storage chamber 18. As indicated by the arrows in the figure, for example, the upper storage space of the uppermost partition shelf and the upper storage space of the middle partition shelf are sprayed with mist discharged from the discharge port 28 to store the lowermost storage space. As the mist flowing into the inlet 29 flows into the space, the storage space between all the partition shelves is also filled. The mist that has passed through the vent 37 returns to the circulation air passage 25 from the suction port 29, and a part thereof is sprayed again into the storage chamber 18 by the diffusion means 27. Some of the water droplets are large and are discharged from the drain 32 to the outside of the storage chamber 18. In order to efficiently perform this drainage, the lower part of the circulation air passage 25 is inclined toward the drain 32 as shown in FIG. If the suction port 29 of the circulation duct 24 and the ventilation port 37 of the food container 36 are opened at substantially the same position, the circulation resistance is low and the efficiency is high.

  In addition, although it is necessary to supply water continuously to the spraying means 26, a water supply tank is provided for this, and the method of replenishing water regularly and the water collection structure which collects and collect | recovers moisture in a storage chamber are taken. Good. Furthermore, a water supply tank and a water recovery structure may be used in combination.

  When the door 21 is not opened or closed at night or the like, the degree of decrease in humidity is gradual, and the mist spraying may be stopped for a certain period of time. In this case, when it is determined by the door opening detection means (not shown) that a certain time has elapsed since the door closed, the operation of the spraying means 26 and the operation of the diffusion means 27 are stopped, and at the same time, the heater 38 provided in the circulation duct 24. Is energized to heat the lower part of the storage chamber 18. The heating control of the heater 38 is controlled so that the temperature difference between the temperature sensor 33 provided on the top surface of the storage chamber 18 and the temperature sensor 34 provided at the bottom of the circulation duct 24 becomes a certain value. As a result, there is a temperature difference between the upper part and the lower part of the storage chamber 18, and natural convection of air is promoted. The heater 38 may be a heater that generates heat substantially uniformly over a wide range, and may be a linear heater or a sheet heater. The means for providing the temperature difference is not limited to the heater, and the temperature of the storage chamber 19 may be controlled lower than that of the storage chamber 20.

  As described above, in the present embodiment, a heat insulating box having a storage chamber partitioned by heat insulation, a spraying means for spraying mist provided in the storage chamber, and a diffusing means for diffusing the sprayed mist are provided. The sprayed mist is diffused and sprayed into the storage chamber by the diffusion means, so that the mist concentration in the storage chamber is made uniform, and the mist can be uniformly distributed throughout the storage chamber. By uniformly coating the inner wall surface and the entire storage shelf with mist, the antifouling effect of the wall surface can be further enhanced.

  Further, in the present embodiment, by providing the mist circulation means in the storage chamber, the mist can be supplied to every corner of the storage chamber, and the amount of mist sprayed can be reduced.

  Further, in this embodiment, the mist circulation means is constituted by the circulation air passage, the circulation duct constituting the circulation air passage, the discharge port and the suction inlet provided in the circulation duct, and the diffusion means. The circulation amount and distribution can be easily adjusted, and the amount of mist sprayed can be further reduced.

  In the present embodiment, the position of the suction port is provided below the food stored in the storage chamber, and mist can be reliably supplied to the bottom of the storage chamber.

  Further, in the present embodiment, the mist sprayed by the spraying means is provided with a selection means for selecting particles having a certain diameter or less, and since the sprayed mist is a fine particle, it is in the storage chamber. It stays for a long time and is dispersed so that mist can be reliably supplied to food.

  In the present embodiment, as the selection means, a spray means is provided below the diffusion means, and light particles having a certain diameter or less can be selectively taken out and sprayed from the sprayed mist. .

  Moreover, in this Embodiment, the temperature difference is provided in the upper part and the lower part of the storage chamber, the natural convection of the storage chamber air is promoted, and the sprayed mist easily diffuses into the storage chamber. At the same time, the spraying means and the diffusing means can be temporarily stopped, and the reliability of the device can be improved.

  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 the store | warehouse | chamber with respect to the spray amount Side sectional view of the refrigerator according to Embodiment 2 of the present invention. Side sectional view of water replenishing means in Embodiment 2 of the present invention Characteristic diagram of mist water particle diameter and dirt removal rate in Embodiment 2 of the present invention Characteristic diagram of mist spray amount and dirt removal rate in Embodiment 2 of the present invention The figure which shows the correlation with the particle diameter of mist, the spray amount, and each effect in Embodiment 3 of this invention. (A) The figure which showed the characteristic of the water particle diameter and stain | pollution | contamination removal rate in Embodiment 3 of this invention (b) The figure which showed the characteristic of the amount of spraying in the Embodiment 3 of this invention, and the dirt spot rate Side sectional view of the refrigerator according to Embodiment 4 of the present invention. Side sectional view of the vicinity of the ultrasonic atomizer of the refrigerator in the fourth embodiment of the present invention. Front view of the vicinity of the ultrasonic atomizer of the refrigerator in the fourth embodiment of the present invention Vertical sectional view of the ultrasonic atomizer of the refrigerator in the fourth embodiment of the present invention Functional block diagram in Embodiment 4 of the present invention Control flow diagram in Embodiment 4 of the present invention Side sectional view of the vicinity of spraying means in Embodiment 5 of the present invention Side sectional view of the vicinity of spraying means in Embodiment 6 of the present invention Side sectional view of the refrigerator in the seventh embodiment of the present invention. Side sectional view of the refrigerator in the seventh embodiment of the present invention. Front sectional drawing of the refrigerator in Embodiment 7 of this invention FIG. 21 is a cross-sectional view of the main part showing the AA cross section in FIG. FIG. 21 is a cross-sectional view of a main part showing a BB cross section in FIG. The graph which shows the particle diameter distribution ratio of the mist sprayed in Embodiment 7 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 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 212 Spray means

Claims (7)

A heat insulating box having a storage chamber partitioned by heat insulation, and spraying means for spraying mist provided in the heat insulating box, the mist sprayed by the spraying means is negatively charged, and the storage chamber is refrigerated. A refrigeration room set in a temperature zone, wherein the mist is soiled by coating the inner wall surface or raising dirt by electrically adhering to the inner wall surface positively charged in the refrigeration chamber. Refrigerator that makes it hard to stick. The refrigerating chamber has a partition plate for partitioning the refrigerating chamber, and the partition plate has a synthetic resin. When the mist adheres to the partition plate, the partition plate is coated or dirt is lifted. The refrigerator according to claim 1, wherein the refrigerator is made difficult to get dirty. The refrigerator compartment has a door pocket for storing food, and the door pocket has a synthetic resin, and the mist adheres to the door pocket to coat the door pocket or to raise dirt. The refrigerator according to claim 1, wherein the refrigerator is made difficult to get dirty. A heat insulating box having a storage chamber partitioned by heat insulation, and spraying means for spraying mist provided in the heat insulating box, the mist sprayed by the spraying means is negatively charged, and the storage chamber is refrigerated. The vegetable room is set in a temperature zone, and the mist is soiled by coating the inner wall surface or raising dirt by electrically adhering to the inner wall surface positively charged in the vegetable room. Refrigerator that makes it hard to stick.   The refrigerator according to claim 1 or 4, wherein a dirt reservoir for collecting dirt substances is provided at a lower end portion of the wall surface in the vertical direction, that is, in a direction parallel to gravity, in the inner wall surface of the storage room.   The heat insulating box includes a stored water holding means for holding liquid, the spraying means sprays the liquid held in the stored water holding means, and the stored water holding means includes a water storage tank. The refrigerator according to any one of claims 1 to 5, wherein stored water supplied from the outside is held in the water tank.   The refrigerator according to any one of claims 1 to 5, wherein the spraying means sprays mist with water generated by condensation of moisture contained in the air in the storage chamber.

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