JP6473397B2 - Cooling system - Google Patents

Description

  The present invention relates to a cooling device that rapidly cools or freezes foods immediately after cooking, for example. The cooling chamber of the cooling device is provided with a cooler, a fan, and a cleaning device for washing these devices with water.

  This type of cooling device is intended for cooling, for example, immediately after cooking (hereinafter simply referred to as “food”), maintains the taste and flavor of the food, and finishes a temperature range in which germs can easily propagate in a shorter time. For this reason, a large fan is used to supply a large amount of cooling air to quickly cool or freeze the food. Therefore, food fragments, lipids, or broth are blown off by the cooling air and adhere to the fan, the cooling fin, or the surrounding wall of the cooling chamber.

  Patent Document 1 discloses a refrigerator having a cleaning device inside a cooling chamber in order to clean the above-described food fragments and lipids. There, a sprinkler-type sprinkler that sprinkles washing water (tap water) around the ceiling while rotating around the ceiling of the cooling chamber, and a sprinkler pipe that supplies the washing water to the sirocco fan is provided by the fan. It is provided to face the air. At the time of cleaning, water is sprayed into the cooling chamber with a sprinkler, and at the same time, the fan blades of the sirocco fan are cleaned with the cleaning water supplied to the intake section, and further, the cooler with the cleaning water scattered around the fan, Clean the inside of the cooling unit. The washing water after washing is discharged from a drainage section provided at the bottom of the cooling chamber.

  After the cleaning is completed, the three-way valve is switched to a state where air can be supplied, and the refrigerator is operated with the sirocco fan stopped to cool the air in the cooling chamber to a reduced pressure state. When the internal pressure of the cooling chamber becomes lower than the atmospheric pressure, the external air is sucked from the three-way valve, so that the wash water remaining in the water sprinkler and the water pipe is discharged by the external air sucked from the three-way valve. Finally, ozone generated by the ozone generator is supplied to the cooling chamber, and a series of cleaning operations is completed.

Japanese Patent No. 3172824 (paragraph numbers 0020 to 0021, FIG. 1)

  According to the refrigerator of patent document 1, wash water can be supplied with a sprinkler and a sprinkler pipe, and a cooler, a sirocco fan, and its peripheral part can be washed with water. Further, since a series of cleaning operations are automatically performed, there is no burden on the operator. However, since the washing water (tap water) ejected from the water sprinkler and the water sprinkling pipe is merely poured on the cooler and the sirocco fan for washing, the food fragments and lipids cannot be washed out sufficiently.

  Furthermore, after the cleaning process is completed, the cleaning water remaining in the water sprinkler and water sprinkling pipe is simply discharged and subjected to ozone sterilization treatment, so it adheres to the radiator fins of the cooler and the corners of the cooling unit. Water droplets and water masses that have not been dried may remain until the start of the next day, and various germs may propagate. In particular, this type of refrigerator is left with the door closed after the series of cleaning operations, and is left until the start of work the next day, so the humidity in the cooling chamber remains high without ventilation. In many cases, water droplets and water mass remained easily. When the sirocco fan is started next time to quickly cool or freeze the food, the water droplets or water mass adhering to the heat radiating fins are blown away by the cooling air and mixed into the food, thereby impairing the taste and flavor of the food. There is a fear.

The object of the present invention is to clean the cooling target such as a cooler and a circulation fan, and then to dry the water droplets and water mass adhering to the cleaning target, so that the inside of the cooling chamber is started on the next day or the next day. An object of the present invention is to provide a cooling device that can be kept in a sanitary state until time.
The object of the present invention is to ensure that the food fragments attached to the object to be cleaned and the oils and lipids that are hard to fall off can be surely washed, and that the drying after washing is also performed reliably to prevent the decay of organic matter and germs in the cooling chamber. An object of the present invention is to provide a cooling device that can prevent propagation and can always keep the inside of a cooling chamber in a hygienic state.

As shown in FIG. 2, the cooling device according to the present invention includes a cooler 15 that cools the internal air of the cooling chamber 2 in the cooling chamber 2 of the main body case 1, and the internal air in contact with the cooler 15. a circulation fan 16 for circulating a shelf 6 mounting for mounting the tray food is accommodated, and the cleaning device is provided for cleaning the coolers 15, circulation fan 16 or the peripheral wall of the cooling chamber 2, . As shown in FIG. 1, a ventilation structure including a ventilation fan 56 that faces the outer surface of the main body case 1 and forcibly ventilates the inside of the cooling chamber 2 by supplying external air is provided. The ventilation structure includes an external air introduction passage 51, an internal air discharge passage 52, a damper 55 that opens and closes the introduction port 53 and the discharge port 54 of both the passages 51, 52, and the introduction passage 51 and the discharge passage 52. And a ventilation fan 56 disposed on either side. In the drying mode after the cleaning mode by the cleaning device, the damper 55 is switched to the open state so that the introduction port 53 and the discharge port 54 can be ventilated, and the inside of the cooling chamber 2 is external air supplied from the ventilation fan 56. While forcibly ventilating, water droplets attached to each device during cleaning are dried.

  In the drying mode, the circulation fan 16 is operated, and drying is performed while blowing water droplets adhering to each device during cleaning with the pressurized air supplied from the circulation fan 16.

  A heater 17 that heats the internal air of the cooling chamber 2 is arranged inside the cooling chamber 2. In the drying mode, the heater 17 is operated to heat the internal air of the cooling chamber 2 to promote drying.

  The cooler 15 and the circulation fan 16 are arranged inside a hollow box-shaped unit case 14 and are configured as a cooling unit 5. As shown in FIG. 8, the cleaning device is disposed on the ceiling of the cooling chamber 2, and includes a first cleaning body 29 that jets cleaning water to the outer surface of the cooling unit 5 and the inner wall of the cooling chamber 2, and the cooling unit. 5, a cooler 15, a circulation fan 16, and a second cleaning body 30 that injects cleaning water onto the inner surface of the cooling unit 5 are provided. As shown in FIG. 8, the cleaning water ejected from the first cleaning body 29 and the second cleaning body 30 is collected in a water storage tank 31 disposed below the cooling chamber 2 and is first cleaned by the feed pump 32. Circulate and feed to the body 29 and the second cleaning body 30. A heater 17 for heating the cleaning water is provided in the cleaning water circulation path. In the cleaning mode, the cleaning water heated by the heater 17 is ejected from the first cleaning body 29 and the second cleaning body 30 to perform cleaning and rinsing cleaning. In the drying mode, the heater 17 is operated to promote drying in the cooling chamber 2.

  In the cleaning mode, the cleaning water is heated by the defrosting heater 17 disposed on the air receiving surface of the cooler 15. In the drying mode, the internal air of the cooling chamber 2 is heated by the defrosting heater 17.

In the cooling device according to the present invention, a cooling structure is provided facing the outer surface of the main body case 1, and low-humidity external air is supplied by the ventilation fan 56 to forcibly ventilate the inside of the cooling chamber 2. 15 and the water droplets adhering to the circulation fan 16 can be dried. According to such a cooling device, after the objects to be cleaned such as the cooler 15 and the circulation fan 16 are cleaned, the water droplets and water mass adhering to the objects to be cleaned are surely dried, and the inside of the cooling chamber 2 is kept the next day. Or it can be kept in a hygienic state by the start of work the next day. Accordingly, it is possible to provide a cooling device that can eliminate the decay of organic matter and the propagation of germs in the cooling chamber 2 and can always keep the inside of the cooling chamber 2 in a sanitary state. In addition, since water droplets can be reliably prevented from remaining during washing, when the food is rapidly cooled or rapidly frozen with a cooling device, the remaining water droplets are blown into the cooling air and mixed into the food, resulting in the taste and flavor of the food. Can be wiped out. A ventilation structure is configured by the introduction passage 51 and the discharge passage 52, the damper 55 that opens and closes the introduction port 53 and the discharge port 54 of both the passages 51 and 52, and the ventilation fan 56 that is disposed in one of the both passages 51 and 52. Then, for example, the internal air with high humidity can be discharged from the discharge passage 52 while the low-humidity external air is supplied by the ventilation fan 56. Therefore, the drying process can be performed while effectively reducing the humidity of the internal air of the cooling chamber 2, and the drying process can be performed more effectively.

  In the drying mode, when the circulation fan 16 is operated and water droplets adhering to each device at the time of cleaning are blown off with the pressurized air supplied from the circulation fan 16, the amount of water droplets remaining on the object to be cleaned is reduced. The drying process can be performed in a reduced state. Also, since the low humidity external air fed into the cooling chamber 2 is forcibly circulated by the circulation fan 16, the water droplets and the like are dried, increasing the chance of contact between the external air and the water droplets for a short time. Thus, the drying process can be performed effectively.

  If the heater 17 is arranged inside the cooling chamber 2 and the heater 17 is operated in the drying mode to heat the internal air of the cooling chamber 2, the relative humidity of the internal air of the cooling chamber 2 can be reduced. Promote the drying process more effectively.

  The first cleaning body 29, the second cleaning body 30, the water storage tank 31, the feed pump 32, and the like constitute a cleaning device, and the cleaning water ejected from both cleaning bodies 29, 30 is collected in the water storage tank 31 and sent. When cleaning is performed by recirculating the first cleaning body 29 and the second cleaning body 30 with the feed pump 32, the consumption of water during cleaning can be saved, and cleaning can be performed with a smaller amount of cleaning water. Therefore, the running cost of the cooling device provided with the cleaning device can be reduced. Further, by providing the heater 17 in the cleaning water circulation path, in the cleaning mode, the cleaning water heated by the heater 17 is ejected from the first cleaning body 29 and the second cleaning body 30 to perform cleaning and rinsing cleaning. Can be done effectively. Further, in the drying mode, by operating the heater 17, the relative humidity of the internal air of the cooling chamber 2 is reduced, and drying of water droplets and the like is promoted, and the drying process can be performed effectively. As described above, according to the cooling device that performs the drying process after performing the hot water cleaning, it is possible to reliably clean the food fragments adhering to the object to be cleaned and the oils and lipids that are hard to fall off. Can be reliably performed to prevent the decay of organic substances and the propagation of germs in the cooling chamber, so that the inside of the cooling chamber can always be maintained in a sanitary state.

  In the cleaning mode, when the cleaning water is heated by the defrosting heater 17 disposed on the air receiving surface of the cooler 15, it is not necessary to provide a separate heating heater 17, thereby reducing the overall cost of the cooling device. it can. Further, since the defrosting heater 17 is disposed on the air receiving surface of the cooler 15, the cleaning water sprayed from the second cleaning body 30 toward the cooler 15 is surely brought into contact with the heater 17 to Can be heated effectively. In the drying mode, since the internal air of the cooling chamber 2 can be heated using the defrosting heater 17, the structure of the cooling device can be simplified as much as the multiple defrosting heaters 17 are used.

It is CC sectional view taken on the line in FIG. 10 which shows the ventilation structure of the cooling device which concerns on this invention. It is a front view of the state which opened the door of the cooling device concerning the present invention. It is a vertical side view of a cooling device. It is a general | schematic cross-sectional top view which shows the circulation of the cold air in a cooling chamber. It is the vertical front view which fractured | ruptured a part of cooling unit. It is the sectional view on the AA line in FIG. It is a partially broken front view which shows schematic structure of a washing | cleaning apparatus. It is the BB sectional view taken on the line in FIG. It is explanatory drawing which shows the outline of a washing | cleaning apparatus. It is a vertical front view of a ventilation structure. It is the DD sectional view taken on the line in FIG.

(Example) FIG. 1 thru | or FIG. 11 shows the Example of the cooling device based on this invention. In the present invention, “upper and lower”, “left and right”, and “upper and lower” follow the cross arrows shown in FIG. 2 and FIG. 2 and 3, the cooling device includes a main body case 1 made of a heat insulating box, a door 4 that swings and opens a cooling chamber 2 inside the main body case 1, a base 3 that supports the main body case 1, and the like. Yes. Inside the cooling chamber 2, there are provided a cooling unit 5, a mounting shelf 6 on which a tray (hotel bread) containing foods is placed, and a cleaning device to be described later. The inside of the base 3 is partitioned into an upper machine room 7a and a lower machine room 7b, and refrigeration equipment such as a compressor 8, a condenser 9, and a blower fan 10 are accommodated in the lower machine room 7b. An operation panel 11 is arranged in front of the upper machine room 7a.

  As shown in FIGS. 5 to 7, the cooling unit 5 includes a hollow box-shaped unit case 14, a vertically long cooler 15 disposed inside the case 14, a pair of upper and lower large circulation fans 16, a cooling unit The heater 15 for defrosting arrange | positioned at the wind-receiving surface of the container 15 is comprised. The cooler 15 includes a refrigerant pipe 18 and a group of fins 19 that are repeatedly bent between a pair of front and rear frames. The circulation fan 16 is an axial fan, sucks the internal air on the mounting shelf 6 side, and feeds the pressurized air toward the cooler 15.

  As shown in FIG. 4, the cold air after the heat exchange that has passed through the cooler 15 collides with the left wall of the cooling chamber 2 and flows from the front and back of the cooler 15 and from the top and bottom to the mounting shelf 6 side. Then, the food in the tray placed on the placement shelf 6 is cooled and sucked into the circulation fan 16 again. The heater 17 is a sheathed heater and is arranged in a state of being repeatedly bent along the air receiving surface of the cooler 15 as shown in FIG. The circulation fan 16 is supported by a motor support arm 23 fixed to the fan shroud 22. The unit case 14 is fixed to an upper bracket 24 and a lower bracket 25 fixed to the left wall of the cooling chamber 2, and a duct pipe 26 for passing a refrigerant pipe and a power line is fixed before and after the upper surface thereof.

  In order to maintain the taste and flavor of the food and pass through a temperature zone where germs easily propagate in a short time, this type of cooling device supplies a large amount of cooling air with a large circulation fan 16. Quick cooling. Therefore, food fragments, lipids, or broth are blown off by the cooling air and adhere to the circulation fan 16, the fins 19, the peripheral wall of the cooling chamber 2, or the like. A cleaning device is provided inside the cooling chamber 2 in order to wash and wash such food fragments and lipids.

  As shown in FIG. 7, the cleaning device includes a first cleaning body 29 disposed on the ceiling of the cooling chamber 2, a second cleaning body 30 disposed inside the cooling unit 5, and a water storage tank disposed in the upper machine chamber 7a. 31 and a feed pump 32 (see FIG. 9). The first cleaning body 29 is a commercially available sprinkler. The cleaning water is spouted while rotating around the vertical axis by the jetting reaction force when the cleaning water is spouted, and the inner wall of the cooling chamber 2 and the outer surface of the cooling unit 5 are sprayed. Wash.

  The second cleaning body 30 is configured by forming a group of first nozzle holes 34 and second nozzle holes 35 on the tube wall of the nozzle tube 33 having a quadrangular cross section. As shown in FIG. 6, the second cleaning body 30 is arranged at four locations above and below the wind receiving surface of the cooler 15, and the front and rear ends thereof are supported by holders 36, and the front end of each second cleaning body 30 is In addition, it is connected to a water supply pipe 37 which is arranged at the front end of the cooler 15 and which is long in the vertical direction. The second cleaning body 30 is supported in a state where the first nozzle hole 34 is inclined toward the cooler 15 and the second nozzle hole 35 is inclined toward the circulation fan 16. Therefore, the wash water passing through the first nozzle hole 34 is ejected obliquely upward toward the cooler 15, and the wash water passing through the second nozzle hole 35 is ejected obliquely upward toward the circulation fan 16. A part of the washing water passing through both nozzle holes 34 and 35 is ejected toward the inner surface of the unit case 14.

  The adjacent pitch P2 of the second nozzle holes 35 is set larger than the adjacent pitch P1 of the first nozzle holes 34. Specifically, as shown in FIG. 8, the adjacent pitch P <b> 2 of the second nozzle holes 35 is set to be slightly more than three times the adjacent pitch P <b> 1 of the first nozzle holes 34, and a larger amount of cleaning water can be ejected to the cooler 15. I am doing so. This is to ensure that the food fragments and the broth that are likely to adhere between the fins 19 of the cooler 15 are washed.

  In order to repeatedly circulate and feed cleaning water to the first cleaning body 29 and the second cleaning body 30, a water storage tank 31 and a feed pump 32 are provided. As shown in FIG. 9, in order to store the wash water in the water storage tank 31 at the start of washing, a water supply pipe 40 is provided on the ceiling of the cooling chamber 2, and the inlet side of the water supply pipe 40 is connected to the water supply via a water supply passage 41. Yes. Furthermore, a flow-down port 42 is provided at the bottom of the cooling chamber 2 so that the wash water discharged from the water supply pipe 40 can flow down to the water storage tank 31. The water supply passage 41 can be opened and closed by a water supply valve 43 provided in the middle thereof. The cleaning water pressurized by the feed pump 32 is supplied to the first cleaning body 29 and the second cleaning body 30 through the circulation water channel 44. 9, reference numeral 45 is a drainage channel, 46 is a drainage valve, 47 is a water level sensor, and 48 is an overflow channel. Although not shown in the drawing, a strainer for filtering out food fragments and the like is provided at the suction port of the circulation water channel 44 immersed in the cleaning water in the water storage tank 31.

  A ventilation structure is provided in the upper part of the main body case 1 in order to supply external air to the cooling chamber 2 and forcibly ventilate the inside of the cooling chamber 2. As shown in FIGS. 1, 10, and 11, the ventilation structure includes an external air introduction passage 51 and an internal air discharge passage 52 formed in the ceiling wall of the cooling chamber 2, and introduction openings of both the passages 51 and 52. 53 and a damper 55 that opens and closes the outlet 54 and a ventilation fan 56 that supplies ventilation air to the introduction passage 51.

  As shown in FIG. 10, the damper 55 includes damper blades 57 and 58 that open and close the introduction port 53 and the discharge port 54, a damper shaft 59 that supports the blades 57 and 58 so as to be swingable and openable, and damper blades 57 and 58. 58 is constituted by a solenoid (actuator) 60 for opening and closing. The front and rear centers of the damper blades 57 and 58 are connected to the plunger 61 of the solenoid 60, and the introduction port 53 and the discharge port 54 can be simultaneously opened by driving the solenoid 60 to advance the plunger 61 downward. The plunger 61 is retreated and biased upward by a spring (not shown). The ventilation fan 56 is a single-suction sirocco fan that houses an impeller 65 inside a fan case 64, and its discharge port is connected to a blade chamber 66 that faces the introduction port 53. An air filter 70 is provided in each of the introduction duct 68 that houses the ventilation fan 56 and the discharge duct 69 that communicates with the blade chamber 67 on the discharge port 54 side. In FIG. 1, reference numeral 71 denotes a partition wall that divides the introduction passage 51 and the discharge passage 52.

  In order to control the operating state of each device constituting the cooling device, a control unit 72 is provided at the rear of the operation panel 11 (see FIG. 9). The control unit 72 includes a cooling mode in which the refrigeration equipment is operated to rapidly cool or rapidly freeze the food, and a cleaning device is operated to clean the inner wall of the cooling chamber 2 and the inside and outside of the cooling unit 5. A program for executing the ventilation mode, the circulation fan 16, and the heater 17 to execute the drying mode for drying the inside of the cooling chamber 2 is registered in advance. The operation panel 11 is provided with a mode selection button, a start button, or an adjustment screen for adjusting the operation conditions of each operation mode. The operation state of the cooling device can be controlled by operating these buttons and the adjustment screen.

  In the cooling mode, after the tray containing the food is placed on the placement shelf 6, the refrigeration equipment, the cooler 15, and the circulation fan 16 are operated to rapidly cool the food by exposing it to a large amount of cooling air. Since the cooling mode ends when the temperature of the food material is lowered to the predetermined temperature, the tray is taken out of the cabinet and the cooling chamber 2 is emptied.

  In the cleaning mode, cleaning is performed through each cleaning process of cleaning, pre-rinsing and post-rinsing. In the cleaning process, first, the water supply valve 43 is switched to the open state, the tap water is allowed to flow down from the water supply pipe 40 into the cooling chamber 2, and the cleaning water that has dropped from the downflow port 42 is accumulated in the water storage tank 31. When the level in the water storage tank 31 becomes full, the water supply valve 43 is switched to a closed state based on a signal output from the water level sensor 47. In this state, the circulation fan 16 and the heater 17 are operated, and the feeding pump 32 is further operated to supply cleaning water to the first cleaning body 29 and the second cleaning body 30, and the first cleaning body 29 is ejected. The inner wall of the cooling chamber 2 and the outer surface of the cooling unit 5 are washed away with the washed water. Further, the cleaning water is ejected from the first nozzle hole 34 of the second cleaning body 30 toward the inner surface of the cooler 15 and the unit case 14, and further the cleaning water is ejected from the second nozzle hole 35 toward the circulation fan 16. To do.

  A part of the washing water ejected from the first washing body 29 is sucked into the circulation fan 16 together with the internal air, and the fan blade, the fan shroud 22 and the motor support arm 23 are washed. Further, the washing water ejected from the first nozzle hole 34 washes away the food fragments adhering to the refrigerant pipe 18 and the fins 19, and a part of the washing water flows down in contact with the sheath pipe of the heater 17. To do. Further, the cleaning water ejected from the second nozzle hole 35 is splashed by the air pressurized by the circulation fan 16 and collides with the inner surface of the unit case 14 or the air receiving surface of the cooler 15, It flows down in a heated state in contact with the protective tube.

  As described above, by arranging the heater 17 in the circulation path of the wash water, the temperature of the wash water in the water storage tank 31 can be gradually increased, and the cooler 15 and the circulation fan 16 are eventually used with the wash water in the hot water state. Etc. can be washed. Therefore, oil stains that are difficult to remove can be effectively washed away with warm water. When a predetermined time (about 20 minutes) has passed and the cleaning process is completed, the operation of the circulation fan 16, the heater 17, and the feed pump 32 is stopped, the drain valve 46 is opened, and the water tank 31 is cleaned. Water is discharged from the drainage channel 45. Waiting for the discharge of dirty washing water to end, the water supply valve 43 is switched to an open state, tap water is allowed to flow down from the water supply pipe 40 into the cooling chamber 2, and new washing water is further supplied from the flow outlet 42 to the water storage tank. To 31. As a result, the drainage valve 46 is returned to the closed state after washing away the food fragments and deposits adhering to the bottom wall of the cooling chamber, the surrounding wall of the downflow opening 42, or the bottom wall of the water storage tank 31. It is possible to shift to the previous rinsing process in a cleaner state.

  In the preliminary rinsing process, rinsing is performed basically in the same manner as the cleaning process. However, since the cleaning water does not necessarily have to be warmed, the heater 17 can be kept in an inoperative state. When a predetermined time (about 10 minutes) has passed and the pre-rinse cleaning process is completed, the circulation fan 16 and the feed pump 32 are stopped, the drain valve 46 is opened, and the cleaning water in the water storage tank 31 is opened. Is discharged from the drainage channel 45, and then the drainage valve 46 is returned to the closed state. In the latter-stage rinsing cleaning process, the rinsing cleaning is performed in the same manner as the previous-stage rinsing cleaning process. When a predetermined time (about 10 minutes) has passed and the post-rinse cleaning process is completed, the operation of the circulation fan 16 and the feed pump 32 is stopped, the drain valve 46 is opened, and the cleaning water in the water storage tank 31 is opened. Is discharged from the drainage channel 45, and then the drainage valve 46 is returned to the closed state.

  In the drying mode, the circulation fan 16 and the heater 17 are operated, and water droplets and water mass adhering to each device at the time of cleaning are blown off with a large amount of pressurized air supplied from the circulation fan 16. The drying is performed while heating the internal air of the cooling chamber 2. The internal air of the cooling chamber 2 in this state contains moisture and is in a high humidity state. Therefore, even if the internal air is repeatedly circulated by the circulation fan 16, the water droplets attached to the refrigerant pipe 18 and the fin 19 of the cooler 15 cannot be effectively dried.

  In order to effectively dry the inside of the cooling chamber 2, in the drying mode, external air with low humidity is supplied into the cooling chamber 2 by the ventilation fan 56 of the ventilation structure, and the inside of the cooling chamber 2 is forcibly ventilated. While circulating the internal air. Specifically, the damper 55 is switched to an open state so that the inlet 53 and the outlet 54 can be vented, and external air pressurized by the ventilation fan 56 is supplied to the cooling chamber 2 via the inlet 53 and the inlet passage 51. Send it in. Thus, when the external air is forcibly fed into the cooling chamber 2, an amount of the internal air corresponding to the fed external air is discharged from the discharge duct 69 through the discharge passage 52 and the discharge port 54. Therefore, the water droplets adhering to the refrigerant pipe 18 and the fins 19 of the cooler 15 are effectively dried in a shorter time, preventing the decay of organic matter and the propagation of germs in the cooling chamber 2, and sanitizing the inside of the cooling chamber. Can be maintained in a typical state When the predetermined time (about 10 minutes) elapses and the drying process is finished, the operation of the circulation fan 16 and the heater 17 is stopped, the operation of the ventilation fan 56 is stopped, and the damper 55 is returned to the closed state. The external air pressurized by the ventilation fan 56 passes through the introduction passage 51 with a predetermined flow velocity and flows into the cooling chamber 2 vigorously, so that the external air flows into the discharge passage 52. It is not dragged by the internal air and discharged.

  During the cooling mode and the cleaning mode, the damper 55 is held in a closed state, and the introduction passage 51 and the discharge passage 52 are closed. Therefore, the cool air in the cooling chamber 2 does not leak to the outside during the cooling mode, and further, the circulating air containing moisture fed by the circulation fan 16 does not leak to the outside during the cleaning mode.

  In the above embodiment, the cooling unit 5 and the mounting shelf 6 are arranged in a state adjacent to the left and right. However, it is not necessary, for example, the cooling unit 5 is arranged in the interior of the cooling chamber 2 and mounted on the front side thereof. The shelf 6 can be arranged. Further, in the cleaning mode, the cleaning water is heated using the defrosting heater 17, and further, in the drying mode, the internal air of the cooling chamber 2 is heated using the defrosting heater 17. There is no need. For example, a heater for heating the cleaning water is provided in the water storage tank 31 and a heater for heating the dry air is provided on the suction port side of the circulation fan 16 to heat the cleaning water and the dry air.

  The ventilation structure does not need to be provided on the upper surface of the main body case 1, and may be provided so as to face the outer surface of the main body case 1. Further, a ventilation fan 56 may be provided on the discharge passage 52 side to perform ventilation while forcibly discharging the internal air of the cooling chamber 2. The ventilation fan 56 may be formed of a centrifugal fan or an axial fan. The introduction port 53 and the discharge port 54 may be provided at separate locations and individually opened and closed with dedicated dampers.

DESCRIPTION OF SYMBOLS 1 Main body case 2 Cooling chamber 5 Cooling unit 6 Mounting shelf 14 Unit case 15 Cooler 16 Circulating fan 17 Heater 29 1st washing body 30 2nd washing body 31 Water storage tank 32 Feeding pump 42 Downflow port 51 Introduction passage 52 Discharge passage 53 Inlet 54 Outlet 55 Damper 56 Ventilation Fan

Claims (5)

Inside the cooling chamber (2) of the main body case (1), a cooler (15) that cools the internal air of the cooling chamber (2), and a circulation fan that circulates while bringing the internal air into contact with the cooler (15) ( 16), and shelf for mounting thereon a tray foodstuff is accommodated (6), cooler (15), circulation fan (16), or a cleaning device for cleaning the peripheral wall of the cooling chamber (2) Is provided,
A ventilation structure including a ventilation fan (56) that faces the outer surface of the main body case (1) and supplies the outside air to forcibly ventilate the inside of the cooling chamber (2) is provided.
The ventilation structure opens and closes the external air introduction passage (51), the internal air discharge passage (52), and the opening (53) and the discharge opening (54) of both the passages (51, 52). ) And a ventilation fan (56) disposed in one of the introduction passage (51) and the discharge passage (52),
In the drying mode after the cleaning mode by the cleaning device, the damper (55) is switched to the open state so that the introduction port (53) and the discharge port (54) can be vented, and the inside of the cooling chamber (2) is provided with a ventilation fan ( 56) A cooling device characterized by drying water droplets adhering to each device during cleaning while forcibly ventilating with external air supplied from 56).   The drying fan (16) according to claim 1, wherein in the drying mode, the circulation fan (16) is operated, and water droplets adhering to each device at the time of cleaning are blown off by pressurized air supplied from the circulation fan (16). Cooling system. A heater (17) for heating the internal air of the cooling chamber (2) is disposed inside the cooling chamber (2),
The cooling device according to claim 1 or 2, wherein in the drying mode, the heater (17) is operated to heat the internal air of the cooling chamber (2) to promote drying . The cooler (15) and the circulation fan (16) are arranged inside the hollow box-shaped unit case (14), and are configured as a cooling unit (5).
A cleaning device is disposed on the ceiling of the cooling chamber (2), and a first cleaning body (29) for injecting cleaning water onto the outer surface of the cooling unit (5) and the inner wall of the cooling chamber (2), and cooling It is disposed inside the unit (5), and includes a cooler (15), a circulation fan (16), and a second cleaning body (30) for injecting cleaning water onto the inner surface of the cooling unit (5),
The washing water ejected from the first washing body (29) and the second washing body (30) is collected in the water storage tank (31) disposed below the cooling chamber (2) and is fed by the feed pump (32). Circulated and fed to the first cleaning body (29) and the second cleaning body (30),
A heater (17) for heating the cleaning water is provided in the cleaning water circulation path,
In the cleaning mode, the cleaning water heated by the heater (17) is ejected from the first cleaning body (29) and the second cleaning body (30) to perform cleaning and rinsing cleaning,
The cooling device according to any one of claims 1 to 3, wherein in the drying mode, the heater (17) is operated to promote drying in the cooling chamber (2) . In the washing mode, the washing water is heated by the defrosting heater (17) arranged on the wind receiving surface of the cooler (15),
The cooling device according to claim 3 or 4, wherein the internal air of the cooling chamber (2) is heated by the defrosting heater (17) in the drying mode .

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