JP5623237B2 - Vacuum drying system - Google Patents

Description

  The present invention relates to a vacuum drying system including a vacuum drying apparatus.

  The conventional vacuum drying apparatus is configured as shown in FIG. 4, and the vacuum drying apparatus 20 includes a main body portion 21 and a sub body portion 40, and an object to be dried (mainly, in a housing 22 of the main body portion 21. ), A drying chamber 24 in which a plurality of trays 26 are placed, a circulation fan 32 that circulates the air in the drying chamber 24, and the air in the drying chamber 24 is discharged to the drying chamber 24. A decompression fan 34 for decompressing the inside is provided. As shown in FIG. 5, the decompression fan 34 is configured to generate frictional heat by reducing the gap between the impeller fan 34d provided on the casing 34a and the rotating body 34c.

  Further, as shown in FIG. 4, a sub-body portion 40 is provided on the side surface of the housing 22, and an intake port 42 and an exhaust port 44 are provided in the housing 41 of the sub-body portion 40, and decompression is performed. The air discharged by the fan 34 is guided into the housing 41 and discharged from the exhaust port 44. The space of the drying chamber 24 is decompressed by the decompression fan 34, and the frictional heat in the decompression fan 34 and the heat generated by the motors in the decompression fan 34 and the circulation fan 32 are sent to the casing 41 together with the exhaust gas. Since the pipe portion 46 meanders in the housing 41, the temperature of the intake air rises and is guided into the housing 22, and the temperature in the drying chamber 24 rises. That is, the housing 41 and the pipe portion 46 constitute a heat exchanger.

  In addition, the applicant knows the document of patent document 1 and patent document 2 as a prior art document.

Japanese Patent Publication No. 61-35463 Japanese Patent Publication No. 4-54875

  However, the above-described conventional vacuum drying apparatus has a problem that various bacteria are likely to propagate in the drying chamber 24 because the drying in the drying chamber 24 is performed at a temperature of 30 to 40 ° C. In particular, since air outside the vacuum drying apparatus 20 is sucked, the germs around the vacuum drying apparatus 20 are sucked, and there is a problem that the germs tend to propagate on the object to be dried.

  Then, an object of this invention is to provide the reduced pressure drying system which can prevent propagation of various germs in a drying room in a reduced pressure drying apparatus.

  The present invention was created to solve the above problems, and firstly, a reduced pressure drying system for drying an object to be dried in a reduced pressure state, wherein the object to be dried is dried under reduced pressure. A drying device (20); an ozone supply device (60) for supplying ozone; and a storage chamber (10) for housing the reduced pressure drying device and the ozone supply device, wherein the reduced pressure drying device comprises a drying chamber (24), A circulation device (32) for circulating the gas in the drying chamber, a decompression device (34) for discharging the gas in the drying chamber to reduce the pressure in the drying chamber, and an exhaust port for discharging the exhaust from the decompression device ( 50a), an intake port (42) for sucking a gas outside the reduced pressure drying device, and a heat exchanger (48) for exchanging heat between the exhaust from the reduced pressure device and the gas sucked from the intake port, And the exhaust port is a hole provided in the wall of the storage chamber. By inserting the exhaust pipe part (50), which is a pipe part provided with the exhaust port, to the outside of the storage chamber, the exhaust from the decompression device is discharged to the outside of the storage chamber and from the intake port. The sucked gas is guided into the drying chamber, and the ozone supply device is a plurality of ozone generators (62) for generating ozone, and a plurality of pipes connected to the ozone generator for discharging ozone into the storage chamber. A pipe part (70) having a hole and an ozone discharge pipe part connected to the ozone generator and having an ozone discharge port (80a) are disposed in the vicinity of the intake port of the vacuum drying apparatus. And an ozone discharge pipe part (80) in which the outlet is arranged, and the storage room has a door part (10-1) for entering and leaving the room. It is hermetically sealed.

  In the vacuum drying system of this first configuration, the drying chamber is decompressed by the operation of the vacuum device, and heat exchange is performed with the exhaust having the heat generated by the vacuum device and the circulation device (particularly the heat generated by the motor). As a result, the temperature of the intake air rises and is led into the drying chamber, and the temperature of the drying chamber rises. As described above, drying under reduced pressure is performed. Further, the exhaust from the decompression device is discharged to the outside of the storage chamber through the exhaust pipe portion. Therefore, even if there are germs in the space in the drying chamber, they are released to the outside of the storage chamber, so that germs do not propagate in the drying chamber. In addition, the ozone generated in the ozone generator is discharged from the hole of the piping part, and ozone is also discharged from the discharge pipe part, so ozone is supplied into the storage room and kills germs in the storage room. Can be made. Further, ozone is supplied into the storage chamber, and in particular, since the discharge port of the discharge pipe portion is provided in the vicinity of the intake port, ozone is also supplied into the drying chamber of the reduced-pressure drying apparatus, so that germs are present in the drying chamber. It can prevent breeding. As described above, in the reduced pressure drying apparatus, it is possible to prevent the propagation of various germs in the drying chamber. In the first configuration, the operation switch of the ozone generator is preferably provided outside the storage chamber.

  Secondly, in the first configuration, at least a part of the piping portion is provided along a ceiling portion of the storage chamber. Therefore, since ozone is heavier than air, exhausting ozone from the ceiling side can lead to the entire storage room.

  Thirdly, in the first or second configuration, the reduced-pressure drying device includes a first housing (22) having the drying chamber, the circulation device, and the pressure-reducing device therein, and a pressure-reducing device. A second casing (41) in which an exhaust pipe portion for sending intake air from an intake port is provided, and a second casing (41) provided therein, And the intake pipe part constitutes the heat exchanger, and the exhaust pipe part is connected to the second housing.

  Fourthly, in any one of the first to third configurations, the decompression device includes a motor, a fan that is rotated by the motor, and a case portion that houses the motor and the fan. Friction heat is generated by reducing the gap between the inner surface of the case portion. Therefore, since the exhaust gas having frictional heat generated in the decompression device is sent to the heat exchanger, the temperature in the drying chamber can be increased also by this.

  According to the vacuum drying system according to the present invention, ozone generated in the ozone generator is discharged from the hole of the piping part and ozone is also discharged from the discharge pipe part. Thus, germs in the storage chamber can be killed, ozone is supplied into the storage chamber, and in particular, since the discharge port of the discharge pipe is provided near the intake port, In addition, since ozone is supplied, it is possible to prevent germs from breeding in the drying chamber. As described above, in the reduced pressure drying apparatus, it is possible to prevent the propagation of various germs in the drying chamber.

It is a perspective view of the vacuum drying system of a present Example. It is a partially broken perspective view of the vacuum drying system of a present Example. It is principal part fracture | rupture sectional drawing of a reduced pressure drying apparatus. It is explanatory drawing explaining a reduced pressure drying apparatus. It is sectional drawing which shows a decompression fan.

  In the present invention, the object of providing a vacuum drying system capable of preventing the propagation of various bacteria in the drying chamber in the vacuum drying apparatus is realized as follows.

  The vacuum drying system 5 in the present embodiment is installed in the storage chamber 10 for storing the vacuum drying device 20 and the ozone supply device 60, the vacuum drying device 20 installed in the storage chamber 10, and the storage chamber 10. And an ozone supply device 60.

  Here, the storage chamber 10 has a floor 10a, walls 10b, 10c, 10d, and 10e, and a ceiling 10f, and has a hole provided in the wall 10d for inserting the exhaust pipe 50 therethrough. Except for the sealed structure. The wall portion 10 b is provided with a door portion 10-1 for entering and exiting the storage chamber 10. That is, since the exhaust pipe 50 is provided in the hole provided in the wall 10d, the interior of the storage chamber 10 is sealed when the door 10-1 is closed.

  The reduced pressure drying apparatus 20 is configured as shown in FIGS. 2 to 5, and includes a main body portion 21, a sub body portion 40, and an exhaust pipe (exhaust pipe portion) 50.

  The main body 21 includes a housing (first housing) 22, a tray 26 provided in the housing 22, a circulation fan 32, a decompression fan 34, and the like.

  That is, a drying chamber 24 is provided on the lower side of the housing 22, and a plurality of trays 26 for placing an object to be dried (mainly food) are disposed in the drying chamber 24. . A circulation fan (circulation device) that circulates the air in the drying chamber 24 may be provided in the upper space 30 (the upper space 30 communicates with the drying chamber 24), which is the upper space in the housing 22. ) 32 and a decompression fan (which may be a decompression device) 34 for discharging the air in the drying chamber 24 and decompressing the interior of the drying chamber 24 is provided. Circulation fan 32 has a blade part and a motor for rotating the blade part. Further, as shown in FIG. 5, the decompression fan 34 is configured to generate frictional heat by reducing the gap between the fan (impeller fan) 34d provided in the casing 34a and the rotating body 34c. Yes. The rotating body 34c is rotated by the motor 34b.

  Further, as shown in FIGS. 2 to 4, a sub body portion 40 is provided on the side surface of the housing 22 of the main body portion 21, and a lower side of the housing (second housing) 41 of the sub body portion 40. Are provided with an inlet port 42 and an exhaust port 44. The inlet port 42 is connected to an end portion of a pipe portion 46 provided meandering in the casing 41, and the other end side is connected to the casing portion. 41 protrudes from an opening provided in 41 and communicates with an intake port 22 a provided in the housing 22. The intake port 42 corresponds to “an intake port that sucks gas outside the vacuum drying apparatus”.

  Further, a pipe portion 35 is connected to the exhaust side of the decompression fan 34 and communicates with the exhaust port 22b of the housing 22, and the exhaust port 22b of the housing 22 communicates with the space on the upper end side of the housing 41 to reduce the pressure. The air exhausted by the fan 34 is guided into the housing 41 from the exhaust port 22 b of the housing 22, passes through the housing 41, and is exhausted from the exhaust port 44. An exhaust pipe 50 is connected to the exhaust port 44, and the exhaust pipe 50 passes through a hole provided in the wall portion 10 d to reach the outside, and an exhaust port 50 a is provided at an end of the exhaust pipe 50. The exhaust port 50a serves as an exhaust port as the reduced pressure drying device 20, and corresponds to the “exhaust port that exhausts exhaust from the reduced pressure device”. FIG. 3 is a longitudinal sectional view at the position of the air inlet 42 of the sub body portion 40.

  In addition, an opening / closing door 22c is provided on the front side of the housing 22 for carrying the material to be dried into the drying chamber 24 and carrying the material to be dried out of the drying chamber 24, and by opening the opening / closing door 22c. The drying chamber 24 communicates with the outside of the vacuum drying apparatus 20. A portion of the housing 22 other than the opening / closing door 22c is a housing body 22d.

  The space of the drying chamber 24 in the housing 22 is decompressed by the decompression fan 34. That is, by causing a difference between the air exhaust amount and the intake air amount, the space in the housing 22 including the drying chamber 24 is decompressed, and when the air pressure is decompressed to a certain pressure, the exhaust air amount and the intake air amount are balanced. The atmospheric pressure is stabilized. As a method for causing the difference between the exhaust amount and the intake amount, for example, the exhaust port 22b is formed larger than the intake port 22a.

  Further, frictional heat in the decompression fan 34 and heat generated by the motors in the decompression fan 34 and the circulation fan 32 are sent to the casing 41 together with the exhaust, while the intake pipe portion 46 meanders in the casing 41. Therefore, the temperature of the intake air rises and is guided into the housing 22, and the temperature in the drying chamber 24 rises. That is, the heat exchanger 48 is configured by the casing 41 and the pipe part 46 (strictly speaking, a part other than the air inlet 42 in the pipe part 46).

  The ozone supply device 60 includes an ozone generator 62 that generates ozone, and a pipe portion 70 and a pipe portion (ozone discharge pipe portion) 80 that are attached to the ozone generator 62.

  The ozone generator 62 is a device that generates ozone, and for example, generates ozone by corona discharge. That is, ozone is generated from air or oxygen in the discharge space by a discharge phenomenon that occurs when a high voltage alternating current is applied to the electrode plate in a state where the electrode plates coated with resin are overlapped.

  Moreover, the piping part 70 is a pipe part for ejecting the ozone generated by the ozone generator 62 from the ceiling part 10f side, and is connected to the ozone generator 62 and the vertical pipe part 72 provided in the vertical direction. And a comb-shaped tube portion 74 connected to the upper end of the vertical tube portion 72, and the comb-shaped tube portion 74 is provided along the ceiling portion 10 f on the ceiling portion 10 f side, and the vertical tube portion 72. A first horizontal pipe portion 74a connected to the upper end of the first horizontal pipe portion, and a plurality of second horizontal pipe portions provided at right angles to the direction from the first horizontal pipe portion 74a to the first horizontal pipe portion 74a at intervals. And a direction tube portion 74b. The first horizontal pipe portion 74a and the plurality of second horizontal pipe portions 74b are provided substantially in parallel with the lower surface of the ceiling portion 10f and the upper surface of the floor portion 10a, and are provided in the horizontal direction. As described above, at least a part of the piping part 70 is provided along the ceiling part 10f.

  A hole (not shown) is formed in the first horizontal pipe part 74a and the plurality of second horizontal pipe parts 74b, and ozone gas is discharged (may be discharged) from the hole part. It has become. In particular, since ozone is heavier than air, exhausting ozone from the ceiling side can lead to the entire interior of the storage chamber 10.

  Further, the pipe portion 80 is provided in connection with the ozone generator 62, and the discharge port 80 a is provided in the vicinity of the intake port 42 of the vacuum drying device 20. In particular, the discharge port 80a is preferably disposed on the front side of the intake port 42. As a result, the ozone discharged from the discharge port 80 a is sucked into the vacuum drying apparatus 20 from the intake port 42 and reaches the drying chamber 24.

  The operation switch of the ozone generator 62 may be provided in the ozone generator 62. However, when an operator works in the storage chamber 10, ozone is not generated from the ozone generator 62. The operation switch of the ozone generator 62 is preferably provided outside the storage chamber 10. That is, since ozone has an ozone odor, ozone is not generated from the ozone generator 62 when an operator works in the storage chamber 10.

  The use state of the vacuum drying system 5 having the above-described configuration will be described. In a state where the vacuum drying apparatus 20 and the ozone generator 62 are not in operation, the operator opens the door portion 10-1 and carries an object to be dried (mainly food) into the storage chamber 10. The opening / closing door 22 c of the housing 22 is opened, and the material to be dried is put into the tray 26. When the material to be dried is put into the tray 26, the open / close door 22c is closed and the vacuum drying apparatus 20 is operated.

  When the reduced-pressure drying apparatus 20 is operated, the operator opens the door unit 10-1 to exit from the storage chamber 10, closes the door unit 10-1, and operates the ozone generator 62.

  Then, in the reduced pressure drying apparatus 20, the interior of the drying chamber 24 is in a reduced pressure state by operating the reduced pressure fan 34, and frictional heat in the reduced pressure fan 34 and heat generated by the motor in the reduced pressure fan 34 and the circulation fan 32 are exhausted. Then, since the pipe portion 46 passes through the housing 41, the temperature of the intake air rises and is guided into the housing 22, and the temperature in the drying chamber 24 rises. . As a result, the inside of the drying chamber 24 is at a pressure of 990 hPa (hectopascal) or less (preferably, a pressure of 980 hPa or more and 990 hPa or less) at a temperature of 35 ° C. or more and 40 ° C. or less, and vacuum drying is performed. Exhaust gas from the exhaust port 22b reaches the exhaust port 44 through the casing 41 and is discharged to the outside from the exhaust pipe 50. Thereby, even if there are various germs in the space in the drying chamber 24, the germs are not propagated in the drying chamber 24 because they are released to the outside of the storage chamber 10.

  Further, the ozone generated in the ozone generator 62 is discharged from the comb-shaped tube portion 74 in the piping portion 70 and ozone is also discharged from the tube portion 80, so that ozone is supplied into the storage chamber 10. The germs in the storage chamber 10 can be killed.

  In addition, ozone is supplied into the storage chamber 10, and in particular, the discharge port 80 a of the pipe portion 80 is provided in the vicinity of the intake port 42, so that the space (particularly, the drying chamber 24) in the housing 22 of the vacuum drying apparatus 20. ) Is also supplied with ozone, so that germs can be prevented from growing in the drying chamber 24.

  In other words, mainly, the ozone discharged from the pipe part 80 suppresses the growth of germs in the drying chamber 24 of the vacuum drying apparatus 20, and the storage room 10 is mainly discharged by the ozone discharged from the comb-like pipe part 74 of the pipe part 70. Since it is possible to suppress the propagation of germs in the inner space, it is possible to sufficiently suppress the propagation of germs in the drying chamber 24, so that the germs do not adhere to the material to be dried and propagate. In other words, when ozone is not discharged from the comb-like tube portion 74 of the piping portion 70, there is a possibility that various germs are discharged in the space outside the vacuum drying apparatus 20 in the storage chamber 10, and then the germs are removed. There is a possibility of entering the drying chamber 24 through the air inlet 42, but by discharging ozone from the comb-like tube portion 74, propagation of germs in the space outside the vacuum drying apparatus 20 within the storage chamber 10 is also possible. Therefore, it is possible to sufficiently suppress the propagation of germs in the drying chamber 24.

  Note that the vacuum drying apparatus 20 is continuously operated for a predetermined drying time, and when the operator enters the storage room 10, the operation of the ozone generator 62 is stopped and ozone is removed. Do not generate.

DESCRIPTION OF SYMBOLS 5 Vacuum drying system 10 Storage chamber 20 Vacuum drying apparatus 22, 41 Case 24 Drying chamber 26 Tray 30 Upper space 32 Circulating fan 34 Vacuum fan 40 Sub body part 22a, 42 Inlet 22b, 44, 50a Exhaust 35, 46, 80 pipe part 48 heat exchanger 50 exhaust pipe 60 ozone supply device 62 ozone generator 70 pipe part 72 longitudinal pipe part 74 comb-like pipe part 74a first lateral pipe part 74b second lateral pipe part

Claims (4)

A vacuum drying system for drying an object to be dried under reduced pressure,
A vacuum drying device (20) for drying the object to be dried under reduced pressure, an ozone supply device (60) for supplying ozone, and a storage chamber (10) for storing the vacuum drying device and the ozone supply device;
A decompression drying apparatus comprising: a drying chamber (24); a circulation device (32) for circulating the gas in the drying chamber; a decompression device (34) for discharging the gas in the drying chamber to reduce the pressure in the drying chamber; Heat is generated between an exhaust port (50a) for exhausting exhaust gas from the decompression device, an intake port (42) for sucking gas outside the decompression drying device, and exhaust gas from the decompression device and gas sucked from the intake port. A heat exchanger (48) for performing the exchange,
The exhaust port is provided outside the storage chamber by inserting an exhaust pipe portion (50), which is a pipe portion provided with the exhaust port, into a hole provided in the wall portion of the storage chamber, and the pressure is reduced. Exhaust gas from the device is discharged to the outside of the storage chamber, and the gas sucked from the intake port is guided into the drying chamber,
An ozone supply device for generating ozone (62), a piping portion connected to the ozone generation device, and a piping portion (70) having a plurality of holes for discharging ozone into the storage chamber; An ozone discharge pipe portion (80), which is connected to the ozone generator and has an ozone discharge port (80a), in which the ozone discharge port is disposed in the vicinity of the intake port of the vacuum drying apparatus. )
The storage chamber has a door portion (10-1) for entering and leaving, and the interior is sealed when the door portion is in a closed state. The reduced-pressure drying system according to claim 1, wherein at least a part of the piping part is provided along a ceiling part of the storage room. The reduced-pressure drying device includes a first housing (22) having the drying chamber, the circulation device, and the decompression device inside, and a second housing to which exhaust from the decompression device is sent. And a second housing (41) provided therein, and the heat exchanger is configured by the second housing and the intake pipe portion, The vacuum drying system according to claim 1, wherein the exhaust pipe portion is connected to the casing. The decompression device includes a motor and a fan that is rotated by the motor, and a case portion that houses the motor and the fan, and frictional heat is generated by reducing a gap between the fan and the inner surface of the case portion. The reduced-pressure drying system according to claim 1, 2, or 3.

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