JP2014190659A - Cooling storehouse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling storehouse capable of effectively preventing or suppressing proliferation of microorganisms on an internal surface of the storehouse.SOLUTION: A cooling storehouse R including a storage room 2 configured so that a front surface is open into a heat insulation box body 1, and cooling an interior of this storage room 2, comprises: a shelf support 16 having a hollow interior and attached to an internal surface of the storage room 2 vertically; a plurality of engagement holes 17 formed in this shelf support 16; shelves 19 disengageably engaged with these engagement holes 17 and suspended in the storage room 2; and a sterilizer 24 generating sterilized air. The sterilized air from this sterilizer 24 is supplied into the shelf support 16.

Description

  The present invention relates to a cooling storehouse in which a storage chamber having a front surface opened in a heat insulation box is cooled by cooling, and a shelf is built in the storage chamber by a shelf column.

  Conventionally, this kind of cold storage has a commercial refrigerator installed in a kitchen of a hotel or a restaurant, for example, and is provided with a storage chamber that is configured in a heat insulating box and has a front opening, and opens and closes the front opening of the storage chamber The door is opened and closed freely by the door, and the cool air exchanged with the cooler is circulated in the storage chamber, thereby cooling the article such as food displayed in the storage chamber to a predetermined temperature (see, for example, Patent Document 1). ).

JP 2002-213856 A JP 2007-240042 A

  Here, since food is stored in the storage room of the cooling storage, microorganisms such as fungi, bacteria, viruses and the like easily propagate on the inner surface (wall surface) of the storage room, and the stored food is contaminated by these microorganisms. There is a risk. Conventionally, measures have been taken to prevent contamination by microorganisms by cleaning the inner surface of the storage room, but it is necessary to remove the stored food from the storage room once, so the work is extremely troublesome. The reality is that is not well implemented.

  On the other hand, a sterilization means is installed in the cold storage for the purpose of removing allergens such as airborne microbial viruses and cedar pollen, and a part of the cool air in the storage chamber is circulated in this sterilization means to remove viruses. However, since the propagation of microorganisms is likely to occur on the inner surface (wall surface) of the storage room, sufficient sterilization effect is not obtained by simply sterilizing the circulating cold air in the storage room and then returning it. I can't expect it.

  The present invention has been made in order to solve the conventional technical problems, and an object of the present invention is to provide a cooling storage that can effectively prevent or suppress the growth of microorganisms in the interior of the storage room. And

  In order to solve the above-mentioned problems, the cooling storage of the present invention comprises a storage chamber whose front surface is opened in a heat insulating box, and is formed by cooling the storage chamber. An attached internal hollow shelf column, a plurality of engagement holes formed in the shelf column, a shelf detachably engaged with the engagement hole and installed in the storage chamber, and sterilization air And a sterilizing device to be generated, and sterilizing air from the sterilizing device is fed into the shelf column.

  According to a second aspect of the present invention, the sterilization apparatus according to the present invention is such that the sterilization apparatus is configured to ventilate air through gas-liquid contact means for holding the electrolyzed water to contact the electrolyzed water. The sterilizing air after contacting with the gas-liquid contact means is fed into the shelf column.

  According to a third aspect of the present invention, the sterilization apparatus according to the present invention includes: the sterilization apparatus includes: an electrolysis unit; water for generating electrolyzed water to be supplied to the gas-liquid contact unit by the electrolysis unit; A water receiving tray for storing electrolyzed water is provided.

  According to a fourth aspect of the present invention, a plurality of shelf columns are attached to the inner surface of the storage chamber, and a cooling duct is provided from the sterilization device to each shelf column. It is characterized by communicating with the inside of the column.

  The cooling storage of the invention of claim 5 is attached to the back of the storage room up and down in the above invention, and includes an internal hollow spacer positioned within the space between the shelf and the back of the storage room. This sterilizing air is also fed into the spacer by an induction duct, and the lower end of the spacer is opened at the bottom of the storage chamber.

  According to the present invention, an internal hollow shelf column attached to the inner surface of the storage chamber is provided in a cooling storage room configured to cool the storage chamber by forming a storage chamber having an open front surface in the heat insulation box. A plurality of engagement holes formed in the shelf column, a shelf detachably engaged with the engagement holes and installed in the storage chamber, and a sterilization device for generating sterilization air, Since the sterilization air from this sterilization device is supplied into the shelf column, the sterilization air from the sterilization device is supplied to the storage chamber by using the shelf column for laying the shelf in the storage chamber. It becomes possible to feed directly to the inner surface (wall surface).

  Thereby, it becomes possible to prevent or suppress the propagation of microorganisms on the surface of the storage chamber very effectively with a simple configuration.

  Further, as in the invention of claim 2, the sterilization apparatus is configured to ventilate air through the gas-liquid contact means for holding the electrolyzed water so as to contact the electrolyzed water. If the sterilization air after contacting with the gas-liquid contact means is fed into the shelf column, the cold air in the storage chamber can be sterilized by contact with the electrolyzed water, It becomes possible to perform sterilization of the storage chamber surface efficiently.

  In this case, as in the invention of claim 3, the sterilization apparatus is supplied with electrolysis means, water for generating electrolyzed water supplied to the gas-liquid contact means by the electrolysis means, and electrolyzed water from the gas-liquid contact means. If the water tray which stores is provided, the electrolyzed water produced | generated by the electrolysis means can be smoothly supplied to a gas-liquid contact means, and it can come into contact with the cool air from a storage chamber efficiently now now.

  Further, as in the invention of claim 4, if a plurality of guide ducts are provided from the sterilization apparatus to the shelf columns attached to the inner surface of the storage chamber, and the sterilization apparatus communicates with the inside of the shelf columns by the guide ducts, The sterilized air can be efficiently and smoothly fed into each shelf column attached to the inner surface of the chamber.

  In particular, when an internal hollow spacer is provided on the back surface of the storage chamber and is located in the space between the shelf and the back surface of the storage chamber as in the invention of claim 5, When the lower end of the spacer is opened at the bottom of the storage chamber, the sterilizing air from the sterilizer is sent to the bottom of the storage chamber by the spacer. It can be supplied smoothly, and in particular, sterilization can be effectively performed at the bottom of the storage chamber where microorganisms are easy to propagate.

It is a perspective view of the cooling storage of one Example to which the present invention is applied. It is a vertical side view of the cooling storage of FIG. It is an expansion perspective view of the shelf support | pillar part of the cooling storage of FIG. It is sectional drawing of the microbe elimination apparatus installed in the cooling storage of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The cooling storage R of the embodiment is a vertical business refrigerator installed in a kitchen of a hotel or a restaurant, and the main body is constituted by a heat insulating box 1 having an open front. A storage chamber 2 having a front opening is formed in the heat insulating box 1, and the front opening of the storage chamber 2 is closed by a door 3 that is, for example, an open door.

  A machine room 4 is defined on the upper surface of the heat insulating box 1, and a compressor 7, a condenser 8, a condenser blower 9, and the like constituting the cooling device 6 are installed. A cooler 11 and a cool air circulation fan 12 are provided in the upper portion of the storage chamber 2, and a partition plate 13 is provided below the cooler 11 and the cool air circulation fan 12. Thereby, the cooling chamber 14 is comprised between the partition plate 13 and the top | upper surface (the inner surface of the storage chamber 2) of the storage chamber 2, and the cooler 11 and the air circulation fan 12 are arrange | positioned in this cooling chamber 14. FIG. ing.

  When the compressor 7 is operated, the cooler 11 exhibits a cooling action. An opening is formed in the rear portion of the partition plate 13, and the cool air exchanged with the cooler 11 by the cool air circulation blower 12 is discharged from the rear of the partition plate 13 into the storage chamber 2. Then, after circulating through the storage chamber 2 as indicated by the thick line arrows in FIG. Thereby, the inside of the storage chamber 2 is configured to be cooled to a predetermined refrigeration temperature.

  On the other hand, on the side surface and the back surface of the storage chamber 2 (both are the inner surfaces of the storage chamber 2), a plurality of shelf columns 16 are attached vertically from the top to the bottom of the storage chamber 2. As shown in FIG. 3, these shelf columns 16 have a substantially gate-like cross section, and are hollow inside with the inner surface of the storage chamber 2. In addition, a plurality of engagement holes 17 are formed in the front surface of the shelf column 16 so as to extend vertically, and upper and lower ends are also opened. An opening at the upper end of the shelf column 16 is defined as 15. Then, a plurality of shelves (net shelves) 19 are installed via shelf receivers 18 (FIG. 2) that are detachably engaged with the engagement holes 17. Reference numeral 21 denotes a floor placed on the bottom surface of the storage chamber 2 (also the inner surface of the storage chamber 2).

  Further, a spacing element 22 is attached to the back surface of the storage chamber 2, and the spacing element 22 is located within a space between the shelf 19 and the back surface of the storage chamber 2, and is placed on the shelf 19. A gap is formed between the food and the back of the storage room 2 to ensure a cold air circulation. The spacer 22 of the embodiment is a hard synthetic resin member that is hollow inside, and is attached from the top to the bottom of the storage chamber 2 in the same manner as the shelf column 16, and the upper and lower ends are open. An opening at the upper end of the spacer 22 is 20 and an opening at the lower end is 23. The lower end opening 23 opens at the bottom of the storage chamber 2.

  Next, FIG. 4 shows a sterilization apparatus 24 that generates sterilization air in the cooling storage R of the present invention. This sterilization apparatus 24 is located outside the storage chamber 2, and is installed in the machine chamber 4 on the upper surface of the heat insulating box 1 in the embodiment (FIG. 2). The sterilization apparatus 24 of the embodiment is formed of a heat insulating material, and includes a box-shaped case 31 that forms a sterilization air path therein. A suction port 32 and a discharge port 33 are formed at positions corresponding to two communication holes (not shown) formed on the wall.

  That is, the suction port 32 is formed at a position corresponding to the suction side communication hole formed in the upper wall of the heat insulation box 1, and the discharge side communication hole formed in the upper wall of the heat insulation box 1. A discharge port 33 is formed at the corresponding position. Cold air in the storage chamber 2 flows into the suction port 32 into the sterilization device 24 by the operation of the blower 12 for circulating cold air. A prefilter 34 is attached to the suction port 32.

  Further, a sterilization blower 36 for sucking cold air from the inside of the storage chamber 2 of the heat insulating box 1 is provided inside the suction port 32. The sterilization blower 36 sucks cold air in the storage chamber 2 from the suction port 32 through the communication hole on the suction side, introduces it into the case 31, and sends it out to a gas-liquid contact member 37 described later. It is.

  And in the case 31 between the suction port 32 and the discharge port 33, the gas-liquid contact member 37 with high water retention as a gas-liquid contact means is erected. The gas-liquid contact member 37 is a filter member having a honeycomb structure, and has a structure in which a wide gas contact area is secured, electrolytic water can be dropped, and clogging is difficult. That is, as the material of the gas-liquid contact member 37, a material that is less reactive to electrolyzed water, which will be described later, that is, a material that is less deteriorated by electrolyzed water, such as polyolefin resin, PET resin, vinyl chloride resin, fluorine Resin-based or ceramic resin-based materials are used.

  A water tray 41 having a water level sensor 38 for detecting a predetermined water level is disposed below the gas-liquid contact member 37, and a water supply pipe 43 is connected to the water tray 41. A water pipe (not shown) is connected to the water supply pipe 43 as a supply source of tap water containing chloride ions, and the water supply supplied to the water tray 41 by the water amount adjustment valve 44 based on the output of the water level sensor 38. The amount is adjusted. In addition, the water receiving tray 41 is provided with a temperature sensor 49 for detecting the temperature of tap water containing electrolyzed water received in the water receiving tray 41 and a heater 50 as heating means.

  The temperature sensor 49 and the heater 50 are anti-freezing means provided to prevent the tap water including the electrolyzed water received by the water receiving tray 41 from freezing. In this embodiment, when detecting + 5 ° C. In addition, when the heater 50 is energized and + 10 ° C. is detected, the heater 50 is deenergized. As a result, it is possible to avoid inconvenience that the electrolyzed water or the like in the water receiving tray 41 freezes, and even if tap water is not supplied to the water receiving tray 41 for some reason, there is a risk of fire due to emptying. The inconvenience that occurs can be avoided.

  A circulation pump 45 is disposed in the water tray 41. The circulation pump 45 is connected to an electrolytic tank 46 as an electrolytic means, and an electrolytic water supply pipe (electrolyzed water dropping means) 47 is connected to the electrolytic tank 46. The electrolyzed water supply pipe 47 includes a large number of water spray holes (not shown) on the outer periphery.

  The electrolyzer 46 is provided with three pairs of electrodes (not shown) in the embodiment. When the electrodes are energized, the tap water flowing into the electrolyzer 46 is electrolyzed (electrochemical treatment) and activated. Oxygen species are generated. Here, the reactive oxygen species are oxygen molecules having an oxidation activity higher than that of normal oxygen and related substances, and are so-called narrowly defined as superoxide anion, singlet oxygen, hydroxyl radical, or hydrogen peroxide. These active oxygens include so-called broadly active oxygens such as ozone and hypohalous acid. The electrolytic cell 46 is disposed in the vicinity of the gas-liquid contact member 37 and is configured so that the active oxygen species generated by electrolyzing tap water can be quickly supplied to the gas-liquid contact member 37.

The electrode provided in the electrolytic cell 46 is, for example, an electrode plate having a base made of Ti (titanium) and a coating layer made of Ir (iridium) and Pt (platinum). A predetermined free residual chlorine concentration (for example, 1 mg (milligram) / l (liter)) is generated at a density of 20 mA (milliampere) / cm ² (square centimeter).

When the tap water is energized by the above electrode, in the electrode constituting the cathode,
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
In the electrode constituting the anode,
2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻
At the same time, the chloride ions contained in the water (pre-added to tap water)
2Cl ⁻ → Cl ₂ + 2e ⁻
In addition, this Cl ₂ reacts with water,
Cl ₂ + H ₂ O → HClO + HCl
It becomes.

  In this configuration, when the electrode is energized, HClO (hypochlorous acid) having a high sterilizing power is generated, and cold air is passed through the gas-liquid contact member 37 to which the hypochlorous acid is supplied. Microorganisms can be prevented from growing in the gas-liquid contact member 37, and microorganisms such as viruses and bacteria floating in the cold air passing through the gas-liquid contact member 37 can be inactivated. Further, when the odor passes through the gas-liquid contact member 37, it reacts with hypochlorous acid in the electrolytic water, and is ionized and dissolved to be removed from the air and deodorized.

  In the present embodiment, the sterilization apparatus 24 positively contacts cold air introduced into the case 31, that is, cold air in the sterilization air path, with the gas-liquid contact member 37. Is provided with a partition wall 51 that is formed to hang down above the electrolyzed water supply pipe 47 and to allow the cool air introduced into the case 31 to stay in the vicinity of the gas-liquid contact member 37 for a predetermined period of time. As described above, a partition wall 55 is formed on the bottom wall of the case 31 at the opening edge of the discharge port 33 on the gas-liquid contact member 37 side so as to extend upward by a predetermined dimension.

  Then, one end of the guide duct member 52 is connected to the discharge port 33 of the sterilization apparatus 24. The induction duct member 52 constitutes an induction duct 53 inside, and passes through the above-described communication hole penetrating the upper wall of the heat insulating box 1, and its upper end is connected to the discharge port 33 of the sterilization apparatus 24. An internal guide duct 53 communicates with the discharge port 33.

  The guide duct member 52 descends from the communication hole along the left side surface (inner surface) toward the storage chamber 2, bends at a right angle from the upper end of the shelf column 16 at the front, and forms the side surface (inner surface) of the storage chamber 2. Then, as shown in FIG. 1, cross over the back surface (inner surface) of the storage chamber 2 to the side surface (inner surface) of the storage chamber 2 on the opposite side (right side) and finally oppose It reaches the upper end of the shelf post 16 on the front side. In addition, the upper end of the spacer 22 passes through the back surface (inner surface) of the storage chamber 2. Outlet holes 54 are respectively formed in the guide duct members 52 at positions corresponding to the openings 15 and 20 at the upper ends of the shelf columns 16 and the spacers 22, and thereby the discharge port 33 of the sterilizer 24 and each shelf. The support column 16 and the spacer 22 are communicated with each other.

  Next, the operation of the sterilization apparatus 24 will be described. When the operation of the sterilizing apparatus 24 is started, the circulation pump 45 is driven, and the tap water accumulated in the water receiving tray 41 is supplied to the electrolytic cell 46. In this electrolytic cell 46, the tap water is electrolyzed by the energization of the electrodes to generate electrolyzed water containing active oxygen species (electrochemical treatment). This electrolyzed water is sprinkled on the upper edge of the gas-liquid contact member 37 through a water spray hole (not shown) of the electrolyzed water supply pipe 47, and the electrolyzed water soaked in the upper edge of the gas-liquid contact member 37 is discharged. Wet gradually toward the bottom.

  The surplus electrolyzed water is received by the water tray 41. In the configuration of the embodiment, the water is circulated, and when the amount of water decreases due to evaporation or the like, the water amount adjustment valve 44 provided in the water supply pipe 43 is controlled to open and close based on the output of the water level sensor 38, and Tap water is supplied as appropriate. In the present embodiment, a water pipe (not shown) is connected to the water supply pipe 43, and the opening / closing control of the water amount adjustment valve 44 is performed based on the output of the water level sensor 38, whereby the water tray 41 has a predetermined water level. However, the present invention is not limited to this. For example, the water receiving tray 41 is provided with a water supply tank (not shown) separately storing tap water and appropriately supplying tap water from the water supply tank. It is also possible to adopt a configuration that maintains a predetermined water level.

  The gas-liquid contact member 37 moistened with electrolyzed water is supplied with the cold air in the storage chamber 2 flowing into the case 31 by the sterilization blower 36 through the suction port 32. The cold air that has flowed into the case 31 comes into contact with the active oxygen species soaked in the gas-liquid contact member 37 provided in the air path for sterilization, is sterilized, and then becomes sterilized air. Are guided by the partition walls 51 and 55 and discharged from the discharge port 33 into the guide duct 53.

  The sterilized air discharged from the discharge port 33 of the sterilization apparatus 24 into the induction duct 53 passes through the induction duct 53 from the left side surface (inner surface) to the back surface (inner surface) toward the storage chamber 2, To the right side (inner surface). And it flows out from the outflow hole 54 corresponding to opening 15 and 20 of the upper end of each shelf support | pillar 16 and the space | interval element 22, and is sent in each shelf support | pillar 16 and the space | interval element 22.

  The sterilizing air that has flowed into each shelf column 16 flows down within the shelf column 16 as shown by the broken line arrows in FIG. 3, and in the process, from each of the lower engagement holes 17 to the lower engagement holes 17. 2 is blown into the storage chamber 2 as indicated by broken line arrows. As a result, the sterilized air is directly fed from above and below the left and right side surfaces (inner surface) and the rear surface (inner surface) toward the storage chamber 2. In addition, the sterilized air that has flowed into the spacer 22 flows down in the spacer 22 as indicated by broken line arrows in FIG. 2, and is directly blown out from the lower end opening 23 to the bottom of the storage chamber 2.

  The sterilized air that has flowed into the storage chamber 2 from the engagement holes 17 of the shelf columns 16 and the openings 23 of the spacers 22 contacts the active oxygen species soaked in the gas-liquid contact member 37 by the sterilizer 24 as described above. The sterilized air is cold air after being sterilized, and active oxygen species dissolved into the air from the gas-liquid contact member 37 are also included in the sterilized air. Although the inside of the storage chamber 2 is sterilized by the supply of such sterilizing air, in particular, the sterilizing air is supplied directly to the left and right side surfaces, the back surface, and the bottom surface (both inner surfaces) of the storage chamber 2, The walls are sterilized powerfully from top to bottom. This effectively suppresses (or prevents) the growth of microorganisms that often occur on the wall surface of the storage chamber 2.

  As described above in detail, in the cooling storage compartment R of the present invention, the inner hollow shelf column 16 attached to the inner surface of the storage chamber 2 having an open front surface formed in the heat insulating box 1 and the shelf column. A plurality of engagement holes 17 formed in 16, a shelf 19 detachably engaged with the engagement holes 17 and installed in the storage chamber 2, and a sterilization apparatus 24 that generates sterilization air. Since the sterilization air from the sterilization device 24 is supplied into the shelf column 16, the sterilization column 24 is sterilized using the shelf column 16 for installing the shelf 19 in the storage chamber 2. The sterilized air from the device 24 can be directly supplied to the inner surface (left and right and rear wall surfaces) of the storage chamber 2.

  This makes it possible to prevent or suppress the growth of microorganisms on the inner surface (wall surface) of the storage chamber 2 extremely effectively with a simple configuration.

  Further, the sterilization device 24 ventilates the gas-liquid contact member 37 holding the electrolyzed water to contact the electrolyzed water, and cools the air in the storage chamber 2 to the gas-liquid contact member 37 of the sterilization device 24. Since the sterilized air that has been brought into contact with the gas-liquid contact member 37 and is in contact with the gas-liquid contact member 37 is fed into the shelf column 16, the cold air in the storage chamber 2 can be sterilized by contact with the electrolyzed water. It becomes possible, and it becomes possible to sterilize the inner surface of the storage chamber 2 efficiently.

  In this case, the sterilization apparatus 24 is supplied with an electrolysis tank 46, water for generating electrolyzed water to be supplied to the gas-liquid contact member 37 by the electrode of the electrolysis tank 46, and electrolyzed water from the gas-liquid contact member 37. Since the water receiving tray 41 to be stored is provided, the electrolytic water generated by the electrode of the electrolytic cell 46 can be smoothly supplied to the gas-liquid contact member 37 so that it can be brought into efficient contact with the cold air from the storage chamber 2. become.

  In addition, since a plurality of guide ducts 52 extending from the sterilization device 24 to the shelf column 16 attached to the inner surface of the storage chamber 2 are provided, and the sterilization device 24 communicates with the inside of the shelf column 16 by the guide duct 53, The sterilized air can be efficiently and smoothly fed into each of the shelf columns 16 attached to the inner surface of the storage chamber 2.

  In particular, the sterilization air from the sterilization device 24 is also introduced into the inner hollow spacer 22 which is attached to the back surface of the storage chamber 2 in the vertical direction and located within the space between the shelf 19 and the back surface of the storage chamber 2. Since the lower end of the spacer 22 is opened at the inner bottom portion of the storage chamber 2 (opening 23), the sterilization air from the sterilization device 24 is stored in the storage chamber 2 by the spacer 22 while being fed by the induction duct 53. Smooth supply to the inner bottom portion, and in particular, sterilization at the bottom portion (corner corner portion) in the storage chamber 2 where microorganisms can easily propagate can be effectively performed.

  In the embodiment, the present invention has been described using a sterilization apparatus that generates sterilized air by bringing electrolyzed water and cold air into contact with each other through a gas-liquid contact member. As long as it produces microbial air, it is also effective for a cooling storage using any other type of sterilization apparatus.

R Cooling storage 1 Heat insulation box 2 Storage room 4 Machine room 16 Shelf column 17 Engagement hole 19 Shelf 22 Spacer 24 Disinfection device 32 Suction port 33 Discharge port 37 Gas-liquid contact member 41 Water tray 45 Circulation pump 46 Electrolyzer 53 Induction duct

Claims (5)

In a heat storage box, a storage room having a front opening is formed, and in the cooling storage room formed by cooling the storage room,
An internal hollow shelf column attached to the inner surface of the storage chamber up and down,
A plurality of engagement holes formed in the shelf column;
A shelf detachably engaged with the engagement hole and installed in the storage chamber;
A sterilization device for generating sterilized air,
A refrigerated storage, wherein the sterilizing air from the sterilizing apparatus is fed into the shelf column. The sterilization apparatus is configured to ventilate air through gas-liquid contact means for holding electrolyzed water to contact the electrolyzed water,
The cool air in the storage chamber is brought into contact with the gas-liquid contact means of the sterilization apparatus, and the sterilization air after contacting the gas-liquid contact means is supplied into the shelf column. Refrigerated storage as described.   The sterilization apparatus includes electrolysis means, water for generating electrolyzed water to be supplied to the gas-liquid contact means by the electrolysis means, and a water tray for storing the electrolyzed water from the gas-liquid contact means. The cooling storage according to claim 2, wherein   A plurality of the shelf columns are attached to the inner surface of the storage chamber, and provided with a guide duct extending from the sterilizer to each shelf column, and the sterilizer and the inside of the shelf column are communicated by the guide duct. The cooling storage in any one of Claims 1 thru | or 3 characterized by the above-mentioned. An inner hollow spacer attached to the back of the storage chamber up and down and positioned within the space between the shelf and the back of the storage chamber;
The sterilization air from the sterilization apparatus is also fed into the spacer by the induction duct, and the lower end of the spacer is opened at the bottom of the storage chamber. Cooling storage.

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