JP6090967B2 - Steam / microwave combination vacuum dryer - Google Patents

Description

  The present invention relates to a steam / microwave combined use vacuum dryer suitable for producing a semi-raw mozuku that has been dried until the weight of an object to be dried such as a harvested mozuku is about ½.

Most of the harvested mozuku is mixed with 20% salt by weight, salted in a salting tank for about 4 to 6 days, and then processed into a salted mozuku obtained by removing excess water and shipped. The salted mozuku is desalted by a secondary processor, processed into a seasoned mozuku, etc. and sold.
A part of the harvested mozuku is dried by a cold-flow or hot-air parallel-flow shelf dryer, etc., and processed into a dried mozuku that has been dried until the water content becomes 7 to 8% before being shipped.

However, the salted mozuku has a problem that it takes time to remove salt, and since it contains a lot of moisture, its weight and volume increase, and packaging / transportation and freezing storage costs increase.
On the other hand, the dried mosk has less water and weight and volume, and can reduce packaging, transportation and frozen storage costs, but has problems such as discoloration due to drying and a decrease in texture, and after returning to water. It takes a lot of work to use.

On the other hand, in the field of cooking such as vegetables, various devices using low-temperature steaming that can be cooked deliciously without damaging ingredients such as flavor and nutrients by using low-temperature steam of 100 ° C or lower are listed below. It has been developed as shown in documents 1-3.
And in such a device, a steaming chamber for storing vegetables to be cooked, a decompression device for making the steaming chamber a decompressed atmosphere, a low-temperature steam supply device for supplying low-temperature steam into the steaming chamber, Is basically provided.

JP-A-9-26103 JP-A-4-48102 JP 2007-135806 A

However, the harvested mosks are intricately intertwined, and due to the peculiar nature of having sliminess on the surface, simply storing the harvested mosks etc. in the container to the same thickness causes uneven drying. Resulting in. In addition, it is possible to improve the drying efficiency of the whole moscow etc. by using the hot air drying exceeding 100 ° C., but the amount of water of each mosc etc. is set to roughly how much. It had no drying accuracy until.
In addition, when hot air drying exceeding 100 ° C. is performed, the flavor of mosk etc. is greatly impaired, and the work of transferring containers containing mosk etc. between a plurality of dryers etc. is also troublesome work It was. Moreover, sufficient calorie | heat_amount for manufacturing a half-lived mozuku etc. cannot be obtained only by implementing low temperature steam as shown to the said patent documents 1-3.

  The present invention has been made on the basis of the above points, and the purpose of the present invention is to improve the drying efficiency and the drying quality by setting the moisture content of each of the mosc and the like within a predetermined range. It is possible to stably produce high-quality dried objects that retain many flavors and ingredients of the material, and to reduce work for transferring the dried objects during drying. The object is to provide an excellent steam / microwave vacuum dryer.

In order to achieve the above object, a steam / microwave combined use vacuum dryer according to claim 1 of the present invention comprises a support structure having an opening for storing a material to be dried and a weight measuring device for measuring the weight of the material to be dried. A drying chamber body with
An opening / closing door that is attached to the opening so as to be openable and closable, and forms a shielded space in the drying chamber main body when closed,
A microwave irradiation device that is attached to the drying chamber body and irradiates the object to be dried accommodated in the drying chamber body to dry the object to be dried;
A steam supply device that is connected to the drying chamber body, supplies low-temperature steam of 100 ° C. or less toward the object to be dried contained in the drying chamber body, and heats and sterilizes the object to be dried;
In a vacuum / microwave combined use vacuum decompressor comprising a decompression device that makes the interior of the drying chamber a decompressed atmosphere with the opening closed.
When the door is in the closed state, the seal structure comprising a seal member for the position to the drying chamber to the opposite surface of the drying chamber body and the door of the opening outer side in an airtight state,
Provided on an intermediate path between the opening and the seal structure, and in the circumferential direction so that the first choke located on the opening side and the second choke located on the seal structure side face each other A microwave leakage prevention mechanism of a double choke integrated structure continuously arranged at a predetermined pitch,
In the drying chamber main body, a container support frame provided with an upper surface shielding plate at a lower end portion that supports a container in which an object to be dried is accommodated, and
A base frame provided on the bottom surface in the drying chamber main body, and provided with a bottom shield on the upper end;
A weight measuring device that is provided in a shielding space sandwiched between the upper surface shielding plate and the lower surface shielding plate and measures the weight of an object to be dried housed in the drying chamber main body, is disposed,
A first choke and a first choke of the same shape and the same size are provided on the upper surface shielding plate at the outer periphery of the shielding space where the weight measuring device is disposed , and the tip is bent in an L shape. A double choke in which two chokes are arranged at opposing positions and are continuously arranged at a predetermined pitch in the circumferential direction so that the first choke and the second choke face each other and face the lower shielding plate Integrated microwave effect prevention mechanism is provided,
Outside the shielding space, a microwave shielding panel that covers the upper surface shielding plate, the lower surface shielding plate, and the microwave influence prevention mechanism is disposed so as to shield the shielding space from microwaves. it is characterized in that it has constructed.

The steam / microwave combined use vacuum dryer according to claim 2 is the steam / microwave combined use vacuum dryer according to claim 1, wherein the decompression device is a water-sealed vacuum that makes the inside of the drying chamber have a reduced pressure atmosphere. A pump,
And a circulating water supply / drainage device for supplying / draining water for driving the water ring vacuum pump.

The following actions can be obtained by the above means. First, in the steam / microwave combined use vacuum dryer of the present invention, since two types of devices, a microwave irradiation device and a steam supply device, are provided, an object to be dried contained in a single drying chamber main body is provided. On the other hand, heating / sterilization using steam and drying using microwaves can be properly used as necessary, or these can be performed simultaneously or sequentially. Therefore, the two types of processing can be performed without movement between apparatuses.
In addition, since it is equipped with a decompression device, it is possible to perform heating and sterilization using low-temperature steam of 100 ° C or lower and drying using a microwave while keeping the drying temperature low, and a series of processing Can be carried out at a low temperature, and a high-quality dried food can be obtained without destroying the flavor or ingredients of the material to be dried.
Further, since the drying chamber body is provided with a support structure having a weight measuring device for measuring the weight of the object to be dried, it is possible to grasp the change in the moisture content of the object to be dried before, during or after drying. Accurate microwave drying based on changes in moisture content is possible.

  Further, when a microwave leakage prevention mechanism having a double choke integrated structure is provided on an intermediate path between the opening and the seal structure, microwave leakage to the outside of the microwave leakage prevention mechanism is at a high level. This is prevented by high frequency circuits. Therefore, since the microwave exposure to the seal structure is prevented, the seal member is prevented from being deteriorated due to the microwave exposure, and the airtightness in the drying chamber body when the door is closed is maintained for a long time. Is done.

In addition, a container support frame having an upper surface shielding plate and a base frame having a lower surface shielding plate are provided in the drying chamber body, and weight measurement is performed in a shielding space sandwiched between the upper surface shielding plate and the lower surface shielding plate. When the container is arranged, it is possible to measure the weight of the object to be dried and grasp the dry state of the object to be dried without interrupting the drying of the object to be dried.
In addition, when a microwave effect prevention mechanism having a double choke integrated structure is disposed on the outer peripheral portion of the shielding space, the microwave supplied into the drying chamber main body is prevented from flowing into the shielding space. Therefore, the influence of the microwave applied to the weight measuring device is prevented, and an accurate weight measurement result of the object to be dried can be obtained.

When the pressure reducing device is configured by including a water-sealed vacuum pump that makes the inside of the drying chamber main body a decompressed atmosphere and a circulating water supply / drainage device that supplies and discharges water for driving the water-sealed vacuum pump. The atmosphere in the drying chamber main body can be reduced in pressure while exhausting drainage gas and waste gas containing moisture in the drying chamber main body with a relatively simple configuration.
In addition, the adoption of the circulation type water supply / drainage device makes it possible to reduce the consumption of water for driving the water ring vacuum pump and to operate the decompression device efficiently.

Next, in the method for producing a dried food described as a reference example , a heating / sterilization process for performing heating / sterilization using low-temperature steam of 100 ° C. or lower, and irradiation with microwaves under a reduced pressure atmosphere, And drying process to measure while measuring, the heating and sterilization process breaks the flavor and ingredients of the material to be dried by heating and sterilization by low-temperature steam using low-temperature steam below 100 ℃ A predetermined heating / sterilization state can be obtained without any problems.
In addition, in the drying process, it is possible to perform drying at a low temperature by microwaves on a heated and sterilized dried material while monitoring the change in the weight of the dried material in a reduced-pressure atmosphere. Thus, it is possible to obtain a dried food that has been accurately dried until a predetermined amount of water remains in a state where a large amount of ingredients and components remain.

In addition, when the steam / microwave combined use vacuum dryer according to any one of claims 1 to 4 is used in both the heating / sterilization step and the drying step, the drying / drying step is accommodated in a single drying chamber body. The above two types of steps can be continuously executed in the state of being accommodated in the main body of the drying chamber without moving the object to be dried along with the transition of the steps.
Therefore, it is possible to perform a series of processes from heating / sterilization performed before drying the object to be dried to drying to a predetermined moisture content to obtain a dried food without moving the object to be dried. Become.

In addition, when heating and sterilizing with low-temperature steam at 80 ° C. for 5 minutes in the above heating and sterilizing process, the necessary amount of heat is ensured without destroying the flavor or ingredients of the material to be dried. And effective heating and sterilization can be carried out with the lowest possible heating temperature and short heating time.
In addition, when the dried product is harvested, washed, sorted and drained into raw mozuku, and the dried food is made into semi-raw mozuku that has been dried until the weight of the raw mozuku is halved. Therefore, it is possible to produce a moscow which is difficult to be uniformly dried with good quality efficiently and to provide a half-boiled moscow.

According to the steam / microwave combined use vacuum dryer of the present invention, heating and sterilization of an object to be dried and accurate drying until a predetermined amount of water is achieved without damaging the flavor and ingredients of the original material. It can be carried out using one dryer.
In addition, according to the dry food production method of the reference example , efficiently produce flavorful dry food based on the management of heating temperature and heating time based on fine weight measurement suitable for producing half-boiled mozuku. Is possible.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is explanatory drawing which shows the outline | summary of the whole structure and piping path | route of a steam / microwave combined use decompression dryer. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a front view which shows the vacuum / microwave combined use vacuum dryer. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a left view which shows the vapor-microwave combined use decompression dryer. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a top view which shows the steam / microwave combined use vacuum dryer. It is a figure which shows the 1st Embodiment of this invention, and is a front view which shows a drying chamber. It is a figure which shows the 1st Embodiment of this invention and is a right view which shows a drying chamber. It is a figure which shows the 1st Embodiment of this invention, and is a rear view of the opening / closing door of the state seen from the arrow A in FIG. It is a figure which shows the 1st Embodiment of this invention, and is an enlarged view of the B section in FIG. It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which shows the attachment site | part of the door in the state which expanded the door. It is a figure which shows the 1st Embodiment of this invention, and is a front view which shows the support structure of a to-be-dried object. It is a figure which shows the 1st Embodiment of this invention and is a right view which shows the support structure of a to-be-dried object. It is a figure which shows the 1st Embodiment of this invention and is a top view which shows the support structure of a to-be-dried object. It is a figure which shows the 1st Embodiment of this invention, and is a bottom view of the state seen from the arrow C in FIG. 11 which shows the support structure of a to-be-dried object. It is a figure which shows the 1st Embodiment of this invention, and is the enlarged view of the D section in FIG. 11 which shows the support structure of a to-be-dried object. It is a figure which shows the 1st Embodiment of this invention, and is a wiring diagram which shows the connection state of the weight measuring device which shows the support structure of a to-be-dried object, and a control part. It is a figure which shows the 1st Embodiment of this invention, and is explanatory drawing which shows the outline | summary of the whole structure of a decompression device, and a piping path | route. It is a figure which shows the 1st Embodiment of this invention and is a front view which shows a decompression device. It is a figure which shows the 1st Embodiment of this invention and is a right view which shows a decompression device. It is a figure which shows the 1st Embodiment of this invention and is a left view which shows a decompression device. It is a figure which shows the 1st Embodiment of this invention and is a top view which shows a decompression device. It is a figure which shows the reference example of this invention, and is explanatory drawing which shows the outline | summary of the manufacturing line of the dried food which enforces the manufacturing method of the dried food of this invention. It is a figure which shows the reference example of this invention, and is a vertical front view which shows an example of an fumigation process. It is a figure which shows the reference example of this invention, and is a vertical front view which shows another example of an fumigation process. It is a figure which shows other embodiment of this invention, and is explanatory drawing which shows the outline | summary of the whole structure and piping path | route of a steam / microwave combined use vacuum dryer. It is a figure which shows other embodiment of this invention, and is explanatory drawing which shows the outline | summary of the whole structure and piping path | route of a vapor | steam and microwave combined use vacuum dryer.

Hereinafter, taking the first embodiment shown in FIG. 1 to FIG. 20 as an example, the configuration and operation mode of the steam / microwave combined use vacuum dryer of the present invention will be described, and referring to the reference example shown in FIG. The configuration of the method for producing a dried food will be described.

(1) 1st Embodiment (refer FIGS. 1-20)
The steam / microwave combined use reduced-pressure dryer 1 of the present invention includes a drying structure including an opening 3 for storing an object A to be dried and a support structure 79 having a weight measuring device 71 for measuring the weight of the object to be dried A. The chamber body 5 is attached to the opening 3 in an openable / closable state, and is attached to the drying chamber body 5 and the door 7 that forms a shielded space in the drying chamber body 5 when closed. A microwave irradiation device 9 for irradiating the object to be dried A contained in the chamber body 5 with microwaves to dry the object to be dried A, and the drying chamber body 5 connected to the drying chamber body 5 The steam supply device 601 for supplying steam to the object to be dried A accommodated in 5 to heat and sterilize the object to be dried A, and the inside of the drying chamber main body 5 under reduced pressure while the opening 3 is closed A pressure reducing device 301 for making the atmosphere In this manner it is constituted.

In the present embodiment, as the steam supply device 601, the first heater device 603 warms water to a predetermined temperature (50 ° C. as an example), and the second heater device 605 supplies the warm water in a reduced-pressure atmosphere. Further, a steam supply device configured to generate low-temperature steam at a predetermined temperature (80 ° C. as an example) by heating is employed.
A hot water supply path 621 is formed between the first heater device 603 and the second heater device 605, and a steam supply path 607 is provided between the second heater device 605 and the drying chamber body 5. Is formed.

The steam / microwave combined use vacuum dryer 1 shown in the figure is provided with a support structure 79 having a weight measuring device 71 (to be described later) on a support frame 23 configured by assembling angle members and the like into a rectangular frame shape. A drying chamber 25 constituted by the drying chamber main body 5 and the open / close door 7 is disposed on the upper left side as an example.
In addition, the second heater device 605 of the steam supply device 601 described above is provided in the lower portion as an example of the drying chamber 25, and the first heater described above using the rear space as an example of the second heater device 605. A device 603 is arranged.

Further, in the vicinity of the support frame 23, another support frame 303, which is also constructed by assembling an angle material or the like into a rectangular frame shape, is provided, and the drying chamber body 5 is provided with respect to the support frame 303. A decompression device 301 is provided that includes a water-sealed vacuum pump 305 that has a reduced-pressure atmosphere inside, and a circulation-type water supply / drainage device 307 that feeds and drains water for driving the water-sealed vacuum pump 305.
In addition, on the right side as an example of the drying chamber 25, a control box 31 having a display unit 27 and an operation button 29 is disposed on the front surface, and between the drying chamber 25 and the steam supply device 601, A pipe for supplying or discharging steam, drain or the like is appropriately disposed between the drying chamber 25 and the pressure reducing device 301.

An inspection window 39 is provided in the center of the front surface of the open / close door 7. As an example of the case where the open / close door 7 is opened and closed on the left and right sides of the inspection window 39, an arch-shaped grip 41 and the open / close door 7 are provided. As an example of the drying chamber main body 5, a hinge portion 43 that is connected to the front surface in a rotatable state is provided.
In addition, on the upper edge and the lower edge of the front surface of the open / close door 7, for example, two rotary lock handles 45 are provided, and the locking claw 47 at the tip of the lock handle 45 is connected to the drying chamber body. The closed state of the open / close door 7 can be locked by being locked by a locking hook 49 provided on the front surface of the door 5.

Further, as shown in FIG. 6, as an example of the drying chamber 25, a gas introduction unit 35 for filling the drying chamber 25 with nitrogen gas or air is provided on the side surface. A support structure 79 having the above-described weight measuring device 71 that horizontally supports the container 59 containing the object to be dried A and measures the weight of the object to be dried A is disposed.
In addition, a small chamber made of punching metal is provided on three side surfaces of the drying chamber main body 5 except for the opening / closing door 7, and steam is supplied by connecting a steam supply path 207 thereto. Yes. In this method, instead of the steam trap, drain or the like is dropped down so that the vapor can be more uniformly bathed on the material A to be dried.
A stirrer fan is provided on the upper surface of the drying chamber body 5. This can prevent uneven heating by reflecting and stirring the microwave electric field.
And in this Embodiment, the drying by a microwave is continued by making the space in which the said weight measuring device 71 is provided into the shielding space 75 by the microwave influence prevention mechanism 73 mentioned later which applied the double choke integrated structure. However, the weight conversion of the material to be dried A that changes from moment to moment can be simultaneously measured.

Examples of the material to be dried A contained in the drying chamber main body 5 include those obtained by washing and sorting the harvested raw mozuku and then draining it, but other fruits such as strawberries, tangerines and persimmons, tomatoes and sweet potatoes Various foods such as vegetables or meat such as can be applied. In addition, each to-be-dried material A has an appropriate steaming temperature (for example, 50 degreeC in leafy vegetables), and the steam / microwave combined use vacuum dryer 1 is configured to be able to control the temperature. ing.
In the present embodiment, raw raw material Mozuku A0 is used as the material to be dried A. For the purpose of producing semi-raw Mozuku A1 in which the weight of the raw material Mozuku A0 is reduced to about ½, A microwave combined use vacuum dryer 1 is used.
In addition, when selecting vegetables or fruits as the material to be dried A, steam is used for the purpose of producing dried vegetables or dried fruits that have been sterilized at high temperature or steamed at low temperatures and then dried to a moisture content of about 5 to 6%. -It is also possible to use the microwave combination vacuum dryer 1.

As an example, the drying chamber body 5 is a rectangular housing member having a rectangular opening 3 formed on the front surface. The front surface outside the periphery of the opening 3 is provided on the back surface of the door 7 described below. The seal surface 61 faces the seal structure 13.
The open / close door 7 is a rectangular plate-like member that is slightly larger than the opening 3, and is close to the outer periphery of the back surface of the open / close door 7, and contacts the seal surface 61 when the open / close door 7 is closed. A seal structure 13 including a seal member 11 constituted by a ring-shaped rubber packing is provided.
A microwave leakage prevention mechanism 21 is provided on the back surface of the open / close door 7 inside the seal structure 13.

The microwave leakage prevention mechanism 21 is provided on an intermediate path 63 between the opening 3 and the seal structure 13, and includes a first choke 17 located on the opening 3 side and a position on the seal structure 13 side. The second choke 19 is configured to be a double choke integrated structure continuously arranged at a predetermined pitch in the circumferential direction so as to face each other.
Specifically, as shown in FIG. 9, a cross section in which a distal end portion 67 is bent 90 ° with respect to a base end portion 69 at an upper end edge of a long shielding plate 65 that is vertically raised from the back surface of the door 7. An L-shaped first choke 17 is provided, and a second choke 19 having the same shape and size as the first choke 17 is disposed at a lower end edge of the shielding plate 65 at a position facing the first choke 17. A microwave leakage prevention mechanism 21 is configured.

Further, a gap G is formed between the tip portion 67 of the first choke 17 and the tip portion 67 of the second choke 19, and the first choke 17 and the second choke from the midpoint O of the gap G. The distance L1 from the front end portion 67 and the base end portion 69 to the connection point B is a distance L2 from the middle point O to the contact point C between the perpendicular line lowered to the shielding plate 65 side and the opposing surface of the shielding plate 65. It is set to be approximately equal to ¼ of the wavelength λ of the microwave used together.
Incidentally, by adopting such a dimension setting, a detour having a length of ¼ of the wavelength λ is formed in the intermediate path 63, and the reflected wave at the detour and the connection point B to the middle are formed. The phase difference with the wave toward the point O becomes half of the wavelength λ and cancels each other, and the leakage of the microwaves outside the drying chamber 25 is prevented.

Further, in the present embodiment, a container support frame 95 having a rectangular upper surface shielding plate 93 at the lower end as the support structure 79 for supporting the container 59 in which the object A is accommodated, and the inside of the drying chamber body 5 And a base frame 99 provided with a lower-surface shielding plate 97 having the same size as the upper-surface shielding plate 93 at the upper end.
Further, in the shielding space 75 sandwiched between the upper surface shielding plate 93 and the lower surface shielding plate 95, three load cells 71 as an example of a weight measuring instrument for measuring the weight of the object to be dried A are shown in FIG. A microwave effect prevention mechanism 73 having a choke structure is disposed on the outer periphery of the shielding space 75.

Further, four fixing plates 103 for the drain pan 101 are raised as an example from the front and rear of the bottom surface in the drying chamber body 5, and the bottom surface is formed as an example at the upper end of these four fixing plates 103. In FIG. 10, a drain pan 101 having a rectangular shape in plan view that is inclined to the right is attached.
As an example, the base frame 99 is fixed on the bottom surface in the drying chamber main body 5, and is disposed on the fixed base 105 and attached to the lower surface of the lower surface shielding plate 97. Each foot 107 and the lower shielding plate 97 having one end of the load cell 71 fixed to the upper surface are provided.

  On the other hand, the container support frame 95 includes the above-described upper surface shielding plate 93 in which the other end of the load cell 71 is fixed to the lower surface, the lower frame 109 raised above the upper surface shielding plate 93, and the lower portion The upper frame 113 is provided with an upper frame 113 provided at the upper end of the frame 109 and supporting two guide rails 111, 111 extending in the front-rear direction at the left and right ends.

The load cell 71 is a load converter that converts a load including a strain generating body, a strain gauge, and a bridge circuit into an electrical signal. In this embodiment, as described above, the change in the weight of the object A to be dried is measured using the three load cells 71, and the data measured by each load cell 71 is an electric signal as shown in FIG. And the above three measurement data are summed in the summing box 115, and the summed data is transmitted to the control box 31.
The summed data transmitted to the control box 31 is displayed as a numerical value on an indicator 127 as an indicator provided on the front surface of the control box 31 or a monitor serving as the display unit 27, or as a control unit. 117 is used to control the drying time and the amount of microwave irradiation.

Further, on the outer peripheral portion of the lower surface of the upper surface shielding plate 93, a microwave influence preventing mechanism 73 shown in FIG. 13 having the same double choke integrated structure as the microwave leakage preventing mechanism 21 is provided.
Specifically, as shown in FIGS. 10 and 11, the shielding plate 65 of the microwave effect prevention mechanism 73 is attached to the lower surface of the upper surface shielding plate 93 through an appropriate spacer 119 as necessary. The second choke 19 is placed on the upper surface of the lower lower shield plate 97.
And by taking such an arrangement | positioning aspect, the shielding space 75 in which the load cell 71 is provided is divided with the internal atmosphere of the surrounding drying chamber main body 5, and is the space where inflow of the microwave was prevented. .

Further, in this embodiment, as shown in FIGS. 10, 11 and 14, the upper surface shielding plate 93, the lower surface shielding plate 97, and the microwave effect prevention mechanism 73 are covered outside the shielding space 75. A microwave blocking panel 121 is provided. The microwave cutoff panel 121 assists the microwave shielding effect that is structurally a high-frequency circuit.
Therefore, in this embodiment, in addition to the microwave shielding effect of the high frequency circuit by the microwave influence prevention mechanism 73, the structural microwave shielding effect by the microwave shielding panel 121 is exhibited. The structure is such that the leakage of microwaves is further prevented.

The microwave irradiation device 9 is provided above the top plate of the drying chamber 25 described above, and an opening (not shown) for guiding the microwave irradiated from the microwave irradiation device 9 into the drying chamber body 5 is provided. It is formed on the top plate of the drying chamber 25.
The microwave irradiating device 9 is provided with one microwave variable output of about 3000 w as an example, and the microwave irradiating device 9 is irradiated with microwaves. A cooling fan is provided for cooling the microwave irradiation device 9 that has been overheated due to the above.

  As described above, the steam supply device 601 includes the first heater device 603 and the second heater device 605. Among these, the 1st heater apparatus 603 detects the temperature of the water in the warm water tank 609 which stores the water for producing | generating a steam, the heater 611 for heating the water in the warm water tank 609, and the water in the warm water tank 609. By providing a temperature sensor 613 used for controlling the heating temperature of the heater 611, a ball tap 615 for detecting the water level in the hot water tank 609, and a nozzle 617 for supplying water to the hot water tank 609, as an example. It is configured.

The warm water warmed by the first heater device 603 is guided into the reduced pressure heating chamber 623 of the second heater device 605 through a warm water supply path 621 provided with a two-way valve 619 on the way. In the reduced pressure heating chamber 623, two heaters 625 provided as an example for heating the hot water supplied in the reduced pressure heating chamber 623 to generate steam and the temperature in the reduced pressure heating chamber 623 are detected. A temperature sensor 627 used for controlling the heating temperature of the heater 625 and a level sensor 629 for detecting the level of hot water supplied into the reduced pressure heating chamber 623 are provided.
The opening and closing of the two-way valve 619 is appropriately controlled based on the change in the water level of the hot water in the reduced pressure heating chamber 623 detected by the level sensor 629. The decompression heating chamber 623 has rigidity and airtightness that can withstand decompression, and communicates with the drying chamber main body 5 through the steam supply path 607 to generate a decompression atmosphere generated by the decompression device 301 described below. Is configured to extend to the reduced pressure heating chamber 623 of the second heater device 605 through the drying chamber body 5. In addition, a decompression device (not shown) separate from the decompression device 301 that decompresses the drying chamber body 5 is provided, and the decompression device provided separately for the purpose of adjusting the decompression atmosphere in the decompression heating chamber 623 is used. Of course it is possible.

Further, a steam supply path 607 is formed between the upper part of the second heater device 605 and the upper part of the drying chamber body 5, and the steam supply path 607 is supplied to the steam, stopped, and opened to the atmosphere. A three-way valve 633 that can switch between cases and a pressure sensor 635 that detects the pressure of low-temperature steam flowing through the steam supply path 607 are arranged.
In addition, the drying chamber body 5 includes a temperature sensor 229 for measuring the temperature in the drying chamber body 5, a two-way valve 251 for intake air, a flow rate adjustment valve 253 for adjusting the flow rate of the introduced air flow, and a drying device. A product temperature adjuster 255 is provided for measuring the product temperature of the object to be dried A and adjusting the microwave output of the microwave irradiation device 9.

  In addition, a discharge path 235 extending toward the pressure reducing device 301 described below is formed in the lower part of the drying chamber body 5, and air is taken in from the outside in the middle of the discharge path 235 so as to increase the pressure in the path. There are provided a needle valve 247 for adjusting the flow rate and a flow rate adjusting valve 249 for adjusting the flow rate of air introduced by opening the needle valve 247.

As described above, the pressure reducing device 301 is basically configured by including the water-sealed vacuum pump 305 and the circulation type water supply / drainage device 307, and further, the water supply path 309 and the drainage path 311 are disposed therebetween. Yes.
The water-sealed vacuum pump 305 is a pump used for exhausting gas containing water vapor or water droplets, and forms a water-sealing ring on the inner wall of the cylinder using the rotation of an impeller attached eccentrically to the cylinder. The pumping action is performed by utilizing the volume change of the space surrounded by the sealing ring and the impeller blades.

The circulation type water supply / drainage device 307 is configured as an example by including the tank 313 and the lower tank 315 inside the support frame 303, and a water supply nozzle 317 for supplying water from the outside to the upper tank 313, A ball tap 319 for measuring the water level in the upper tank 313 and a temperature sensor 321 for measuring the water temperature in the upper tank 313 are arranged.
On the other hand, a submersible pump 323 is disposed in the lower tank 315, and the upper tank is pumped up the water discharged from the water-sealed vacuum pump 305 and stored in the lower tank 315 through the discharge path 311. It can be supplied to 313.

A three-way valve 327 driven by a motor is disposed as an example in the middle of a circulation path 325 connecting the submersible pump 323 and the upper tank 313. By switching the three-way valve 327 as appropriate, The water pumped up by the pump 323 is supplied into the upper tank 313 or drained to the outside.
Further, the above-described water supply path 309 extends from the bottom of the upper tank 313, and the other end of the water supply path 309 is connected to the above-described water-sealed vacuum pump 305.

Next, the procedure for heating / sterilizing or drying the object A to be dried using the steam / microwave combined use vacuum dryer 1 according to the first embodiment configured as described above, and the sealing structure 13 and the action of the microwave leakage prevention mechanism 21 and the microwave influence prevention mechanism 73 will be described.
First, an object to be dried A to be heated / sterilized and microwave-dried is put in a container such as a container 59, and the opening / closing door 7 is opened by grasping the grip 41. Then, the container 59 is placed from the front so that the guide rail 111 slides on the upper frame 113 in the support structure 79 in the drying chamber body 5 from the opened opening 3.
Next, the grip 41 is grasped and the open / close door 7 is closed to close the opening 3. Subsequently, the lock handle 45 is gripped and the lock handle 45 is rotated in a predetermined direction so that the locking claw 47 of the lock handle 45 is locked to a locking hook 49 provided on the front surface of the dryer body 5 to open and close the door 7. Lock the blocked state of.

Next, the initial weight of the object A to be dried is measured using the load cell 71, the operation button 29 on the front surface of the control box 31 is pushed, the decompression device 301 is activated, and the atmosphere of the drying chamber body 5 and the decompression heating chamber 623 is changed. Use a vacuum atmosphere.
Subsequently, the steam supply device 601 is activated, the first heater device 603 is used, hot water at a predetermined temperature (for example, 50 ° C.) is boiled, and the reduced pressure heating chamber 623 of the second heater device 605 is passed through the hot water supply path 621. Supply hot water inside.

In the reduced pressure heating chamber 623, the hot water supplied by the heater 625 is further heated to generate low temperature steam at a predetermined temperature (for example, 80 ° C.). The generated low-temperature steam is introduced into the drying chamber body 5 through the steam supply path 607, and the object to be dried A in the drying chamber body 5 is heated and sterilized for a predetermined time (for example, 5 minutes).
Next, the heater 625 is stopped and the process proceeds to microwave drying by the microwave irradiation device 9, and the weight of the material A to be dried is set to a predetermined target while confirming the product temperature of the material A to be dried by the product temperature regulator 255. Dry to weight (eg 1/2 of initial weight). The set input information, the temperature in the drying chamber 25, and the like are displayed on the display unit 27 during drying.

In addition, the airtightness in the drying chamber body 5 during drying is maintained by the sealing member 13 provided on the back surface of the open / close door 7 being pressed against the sealing surface 61 on the front surface of the drying chamber body 5. I'm leaning.
Further, the leakage of the microwave to the outside of the drying chamber main body 5 is prevented in a high frequency circuit by the action of the microwave leakage prevention mechanism 21 having the double choke integrated structure described above, and the shielding space 75 in which the microwave load cell 71 exists. Inflow to the inside is prevented by the high frequency circuit shielding effect by the above-described microwave influence prevention mechanism 73 of the double choke integrated structure and the structural shielding effect by the microwave shielding panel 121.

(2) Reference example (see FIGS. 1 and 21 to 23)
The method for producing a dried food of the reference example includes a heating / sterilization step S5 in which low temperature steam of 100 ° C. or lower is bathed on a material to be dried A for a predetermined time to heat and sterilize, and the material to be dried A that has been heated and sterilized has a reduced pressure It is basically configured by including a drying step S6 in which a microwave is irradiated below and dried while measuring the weight of the object to be dried until a predetermined moisture content is obtained.

Further, in this reference example , raw mozuku (raw mozuku A0) harvested as the material to be dried A is used, and the raw mozuku A0 that has been stored frozen is used as a pre-process leading to the heating and sterilization process S5. Thawing step S0 for naturally thawing, washing and sorting step S1 for removing dirt, small-sized and lightweight foreign matter F1 and small-sized and heavy foreign matter G1 adhering to the raw material Mozuku A0, and a large size that could not be removed by the washing and sorting step S1 Sorting process S2 in which an operator visually removes the lightweight foreign substance F2 and the large heavy foreign substance G2, and the moisture adhering to the surface of the raw material Mozuku A0 from which the foreign substances F1, F2, G1, and G2 have been removed. A dewatering step S3 for performing the process, and a spraying step S4 for unwinding the dehydrated raw material Mozuku and the like A0 and spraying them flat on the container 59 by a predetermined amount.
Further, as a subsequent process of the drying process S6, an aeration process S7 for keeping the finished half-grown Mozuku A1 (dried food D) in a cool and dark room for a predetermined time to make the water content uniform is provided. The manufacturing method of the dried food according to the present embodiment is configured by the process.

The following description will focus on (A) the heating / sterilization step S5 and (B) the drying step S6, which are characteristic configurations of the reference example , and (B) the step performed after the completion of the drying step S6. Reference is made to the steaming step S7.
(A) Heating / sterilization process (see FIGS. 1 and 21)
About 3 to 5 kg of the raw material Mosque A0 is accommodated in the container 59, put in the drying chamber body 5, and the initial weight of the raw material Mosque A0 together with the container 59 is measured by the load cell 71.
Next, the decompression device 301 is activated to bring the atmosphere in the decompression heating chamber 623 of the second heater device 605 into a predetermined decompressed state. At this time, the electric two-way valve 251 for introducing an air flow provided in the drying chamber body 5 is closed.

In addition, the first heater device 603 is activated to boil hot water of about 50 ° C. in advance and supplied into the reduced pressure heating chamber 623 of the second heater device 605.
Next, the second heater device 605 is activated to generate a low-temperature steam at 80 ° C. and supplied into the drying chamber body 5, and the raw material Moz A0 in the drying chamber body 5 is heated and sterilized for about 5 minutes.
In order to obtain the low-temperature saturated steam at 80 ° C., it is necessary to reduce the pressure in the reduced pressure heating chamber 623 and the drying chamber body 5 to about 47.5 kPa · abs. The valve 247 is controlled in proportion to the pressure, and this state is maintained and heating and sterilization are performed with low-temperature steam at 80 ° C.

The low-temperature steam used for heating and sterilization is discharged together with the drain by opening the three-way valve 312 provided on the drainage path 311 of the decompression device 301. After the heating and sterilization is completed, the three-way valve 312 is closed, and the drainage of the water-sealed vacuum pump 305 is returned to the circulation type water supply / drainage device 307 and repeatedly used.
The amount of low-temperature steam generated is adjusted by the amount of heat generated by the heater 625 based on the measured value of the temperature sensor 627 provided in the reduced pressure heating chamber 623.

(B) Drying step (see FIGS. 1 and 21)
Next, the process enters a step of drying the weight to half without losing the texture of half-boiled mozuku. This step is performed by microwave heating with the supply of steam stopped.
First, after the heating / sterilization step S5 described above is completed, the heater 625 in the reduced pressure heating chamber 623 is stopped, the needle valve 247 described above is closed, and all of the intake air of the water-sealed vacuum pump 305 is reduced in the reduced pressure heating chamber 623. And inhaled from the drying chamber body 5.
Next, the setting of the pressure sensor 635 is changed from 47.4 kPa · abs that generates saturated steam at 80 ° C. to 7.4 kPa · abs that generates saturated steam at 40 ° C., and the pressure sensor 635 is changed to 7.4 kPa · abs. If it has been determined that it has reached, the three-way valve 633 of the steam supply path 607 is driven to close the valve on the drying chamber body 5 side, and the decompression heating chamber 623 is opened to the atmosphere.

Further, when the pressure in the drying chamber body 5 reaches 7.4 kPa · abs, the two-way valve (air flow introduction valve) 251 is opened, air or nitrogen gas is introduced into the air flow, and the above-mentioned 7.4 kPa is introduced by the flow rate adjustment valve 253. Maintain abs pressure.
Next, the microwave irradiation apparatus 9 is started, the two-way valve 251 is opened, the stirrer fan 257 is turned on, and drying by microwaves is executed. In addition, during the drying by the microwave, the change in the weight of the raw material mosk A0 is measured by the load cell 71, and the product temperature of the raw material mosk A0 is controlled by the product temperature regulator 255. The semi-raw Mozuku A1 dried until the weight of the starting Mozuku A0 is about ½ of the initial weight.
Then, when the predetermined drying is finished and the semi-moist Mozuku A1 that is the dried food D is completed, the operation button 29 is pressed to stop all the operations of the steam / microwave combined use vacuum dryer 1.

(C) An fumigation process (see FIGS. 21 to 23)
An fumigation is an operation to make the moisture content of the dried food D uniform. The semi-moist Mozuku A1 produced by the above drying process is taken out from the steam / microwave combined use vacuum dryer 1 together with the container 59, and stacked in a container body 703 having an open upper surface of the steaming storage 701 as shown in FIG. House in state. Then, the opened upper surface of the container main body 703 is closed with a lid 705, transported to a cool and dark room and stored for a predetermined time, and an fumigation process is executed.
Further, as another embodiment of the anemonizing step, the semi-moist Mozuku A1 taken out from the drying chamber main body 5 is taken out from the container 59 and packed in a stacked state as shown in FIG. It is housed in a mozuku container 707 which is another example. Then, the open upper surface of the mozuku container 707 is closed with a lid 709, carried to a cool and dark room, stored for a predetermined time, and an fumigation process is executed.

  Moreover, the half-boiled Mozuku A1 that has been subjected to such a fumigation process can achieve a uniform moisture content and does not cause unevenness even when frozen. Further, in this embodiment, the amount of the semi-moist Mozuku A1 accommodated in the container main body 703 and the mozuku container 707 is about 10 to 20 kg, and after the fumigation process is performed for about 24 hours, it is weighed and filled. Packaged and offered to market. Specifically, a product packed in a bag of 10 to 20 kg is packed and shipped as it is, or is packed in a cardboard box after being packed into 100 to 200 g.

Thus, in this reference example , since heating and sterilization process S5 is implemented with respect to raw material moz A0 drained through dehydration process S3 and spraying process S4, it heats without impairing the flavor of raw material moz A0 -Since the sterilization is performed and the heating / sterilization step S5 and the drying step S6 are performed in the drying chamber main body 5 maintaining airtightness, there is no problem of adhesion of falling bacteria during heating / sterilization or drying.
In addition, heating and sterilization after packaging, which is difficult to heat and sterilize at low temperatures, is unnecessary.

And since the half-boiled Mozuku A1 manufactured in this way does not need to return to water like a dry Mozuku, it can be used for cooking as it is and can be processed into tempura, seasoned Mozuku and the like. Incidentally, when the half-boiled mozuku A1 is processed into tempura, the oil does not jump up and fries smoothly, and when it is used as a seasoned mozuku, it has excellent absorbency of the seasoning liquid, so that even if the salt content is refrained, a satisfactory taste is obtained.
In addition, the half-grown Mozuku A1 is approximately half the weight and volume of the raw Mozuku A0, so it can be shipped almost twice as much as the conventional shipment, and can be used for packaging, transportation, frozen storage, etc. It also has the effect of drastically reducing required costs.

The steam / microwave combined use vacuum dryer 1 of the present invention is not limited to the above-described embodiment, and can be modified within the scope of the invention.
For example, the configuration of the steam supply device is not limited to the steam supply device 601 having the configuration described in the first embodiment, and various configurations having the same low-temperature steam generation capability can be employed. Specifically, the steam supply device 201 having the configuration including the boiler equipment 203, the steam supply path 207, and the steam circulation path 209 shown in FIG. 24, the boiler equipment 503, the cooler 505, and the steam supply path 507 shown in FIG. It is possible to employ a steam supply device 501 having a configuration including:

  Among these, the steam supply apparatus 201 shown in FIG. 24 includes a boiler facility 203 serving as a steam generation unit, and high-temperature steam supplied from the boiler facility 203 as low-temperature steam of 100 ° C. or less (in the form of the present embodiment, 40 to 40). A low-temperature steam generation unit 202 that uses a low-temperature steam of about 70 ° C.), the above-described steam supply path 207, the steam circulation path 209, and the boiler equipment 203, the steam generation unit 202, and the drying chamber body 5 The steam adjustment path 213 is provided as an example.

As the boiler equipment 203, for example, a boiler 215 having a maximum output of about 0.68 MPa using liquefied petroleum gas as fuel can be applied, and a working pressure range of the boiler 215 is adjusted to a steam supply path 207 extending from the boiler 215. A pressure gauge 233, a pressure reducing valve 237, a bypass valve 245, and the like are appropriately disposed.
The low-temperature steam generation unit 202 controls the temperature of the steam supplied from the boiler equipment 203 to make the low-temperature steam at the above-described predetermined temperature, and the steam adjustment path 213 by setting the steam adjustment path 213 to a high vacuum and the steam supply path An ejector 211 that sucks in non-condensable gas and drain in 207, a tank 217 that stores driving water for the ejector 211, a line pump 219 that pressurizes driving water in the tank 217, and a drain in the steam adjustment path 213 It is basically configured by providing a steam trap 221 that eliminates and enables a stable supply of steam.

In addition, the tank 217 is provided with a level sensor 223 and a motor-driven two-way valve 225 used when water is supplied into the tank 217. Further, an overheat prevention valve 227 that also serves as a cold water replenishing port is provided at a connection portion between the steam supply path 207 and the steam adjustment path 213 downstream of the vacuum pressure reducing valve 205. A pressure gauge 233 is arranged.
The steam supply path 207 extends further toward the upper side of the drying chamber body 5 via a connection point with the steam adjustment path 213. A temperature sensor 229 for measuring the temperature of the low-temperature steam flowing in the steam supply path 207 is arranged downstream of the above-described overheat prevention valve 227, and the pressure of the low-temperature steam is detected downstream of the temperature sensor 229. A pressure sensor 231 is disposed. Further, a two-way valve 225 is disposed downstream of the pressure sensor 231, and the pressure sensor 231 is also disposed in the vicinity of the connection portion with the dryer main body 5.

The steam circulation path 209 is formed toward the steam supply path 207 and the steam adjustment path 213 from the middle of the discharge path 235 extending from the lower portion of the dryer main body 5 toward the decompression device 301 described below. .
A two-way valve 225 and a check valve 239 are arranged on the upstream side of the steam circulation path 209, and the branch 241 is divided into two paths, a steam supply path 207 side and a steam adjustment path 213 side. Of these paths, the path extending toward the steam supply path 207 joins the connection point where the temperature sensor 229 is disposed, and the steam trap 221 and the bypass valve 245 are disposed in the middle of the path. On the other hand, the path extending toward the steam adjustment path 213 joins the connection point at the downstream position of the steam trap 221 disposed in the steam adjustment path 213.

Among these, the steam supply apparatus 501 shown in FIG. 25 is provided with the boiler equipment 503 similar to the boiler equipment 203 of the steam supply apparatus 201 shown in FIG. 24 described above, and the boiler equipment 503 includes the boiler 509 and the pressure. A gauge 511, a pressure reducing valve 513, and a bypass valve 515 are provided. A steam supply path 507 extends from the boiler facility 503 toward the drying chamber main body 5, and a cooler 505 is disposed at a position upstream of the steam supply path 507 via a two-way valve 517.
As the cooler 505, a blower-type cooling device including a cooling fan 519 and a cooling pipe line 521 can be applied as an example, and a downstream of the cooler 505 extends from a water supply tank 525 via a temperature sensor 523. It is configured to reach a mist nozzle 529 provided at a junction with the water supply path 527. Note that the air volume by the cooling fan 519 is controlled so as to be appropriately increased or decreased based on the level of the steam temperature detected by the temperature sensor 523.

When the temperature of the steam cooled by the cooler 505 is high, water for reducing the temperature of the steam is stored in the water supply tank 525, and further, a ball tap 531 for detecting the water level, And a nozzle 533 for replenishing water when the temperature becomes low. A two-way valve 535 is provided on the water supply path 527 downstream of the water supply tank 525.
The water supplied to the mist nozzle 529 is made into mist, and together with the low-temperature steam supplied from the cooler 505, passes through the steam supply path 507 on the downstream side and is dried via the two-way valve 535. Guided into the chamber body 5. In addition, a pressure sensor 537 is provided at the downstream end of the steam supply path 507, and the upstream position of the cooler 505 described above based on the pressure level of the mist mixed steam detected by the pressure sensor 537. Opening and closing of the two-way valve 517 is appropriately controlled.

And even if it uses the steam supply apparatus 201 shown in FIG. 24 comprised in this way, and the steam supply apparatus 501 shown in FIG. 25, it is possible to perform heating and sterilization using low temperature steam, and was mentioned above. Functions and effects similar to those of the steam supply apparatus 601 shown in FIG. 1 can be exhibited.
Further, the configuration of the decompression device 301 is not limited to the configuration described in the first embodiment, and the type of the material A to be dried that also processes the capacity of the boiler equipment 203 and the microwave capacity of the microwave irradiation device 9 It can be appropriately changed depending on the amount.
In addition, the structure of the open / close door 7 of the steam / microwave combined use vacuum dryer 1 is not limited to the single-open door 7 described in the first embodiment, and may be a slide-type open / close door 7. Depending on the size of the drying chamber body 5 and the type of the object to be dried A, it is possible to employ the open / close door 7 having various structures that allow the object to be dried A to be taken in and out easily.

  The steam / microwave combination vacuum dryer of the present invention can be used in the field of production and use of dried foods that combine heating / sterilization with steam and drying. It has applicability when it is desired to produce dried foods such as mozuku efficiently while leaving the flavor.

DESCRIPTION OF SYMBOLS 1 Steam-microwave combined use vacuum dryer 3 Opening part 5 Drying chamber main body 7 Opening / closing door 9 Microwave irradiation apparatus 11 Seal member 13 Seal structure 17 1st choke 19 2nd choke 21 Microwave leakage prevention mechanism 23 Support stand 25 Drying chamber 27 Display part 29 Operation button 31 Control box 35 Gas introduction part 39 Inspection window 41 Grip 43 Hinge part 45 Lock handle 47 Locking claw 49 Locking hook 59 Container 61 Sealing surface 63 Intermediate path 65 Shielding plate 67 Tip part 69 Base end part 71 Load cell 73 Microwave influence prevention mechanism 75 Shielding space 79 Support structure 93 Upper surface shielding plate 95 Container supporting frame 97 Lower surface shielding plate 99 Base frame 101 Drain pan 103 Fixed plate 105 Fixed base 107 Foot 109 Lower frame 111 Guide rail 113 Upper frame 11 5 Summing box 117 Control unit 119 Spacer 121 Microwave shielding panel 127 Indicator (indicator)
201 Steam supply device 202 Low temperature steam generation unit 203 Boiler equipment 205 Vacuum pressure reducing valve 207 Steam supply path 209 Steam circulation path 211 Ejector 213 Steam adjustment path 215 Boiler 217 Tank 219 Line pump 221 Steam trap 223 Level sensor 225 Two-way valve 227 Prevention of overheating Valve 229 Temperature sensor 231 Pressure sensor 233 Pressure gauge 235 Discharge path 237 Depressurization valve 239 Check valve 241 Branch 245 Bypass valve 247 Needle valve 249 Flow adjustment valve 251 Two-way valve 253 Flow adjustment valve 255 Product temperature regulator 257 Stellar fan 301 Depressurization Device 303 Support frame 305 Water-sealed vacuum pump 307 Circulating water supply / drainage device 309 Water supply route 311 Drainage route 312 Three-way valve 313 Upper tank 315 Lower tank 317 Water supply nozzle 319 Ball tap 3 21 Temperature sensor 323 Submersible pump 325 Circulation path 327 Three-way valve 415 Meter 417 Press device 421 Microwave vacuum agitation dryer 423 Support frame 425 Drying chamber 427 Open / close door 429 Handle 431 Lock device 433 Microwave irradiation device 435 Control panel 437 Stirring shaft 439 Stirring blade 441 Cutting blade 443 Stirring motor 445 Gear head 447 Discharge port 449 Discharge box 451 Suction pipe 453 Vacuum pump 455 Supply hose 457 Gas cylinder 461 Microwave vacuum dryer 481 Sealed container (expansion foaming device)
491 Cutting machine 493 Cutter blade 495 Input hopper 501 Steam supply device 503 Boiler equipment 505 Cooler 507 Steam supply path 509 Boiler 511 Pressure gauge 513 Pressure reducing valve 515 Bypass valve 517 Two-way valve 519 Cooling fan 521 Cooling line 523 Temperature sensor 525 Water supply Tank 527 Water supply path 529 Mist nozzle 531 Ball tap 533 Nozzle 535 Two-way valve 537 Pressure sensor 601 Steam supply device 603 First heater device 605 Second heater device 607 Steam supply route 609 Hot water tank 611 Heater 613 Temperature sensor 615 Ball tap 617 Nozzle 619 Two Directional valve 621 Hot water supply path 623 Decompression heating chamber 625 Heater 627 Temperature sensor 629 Level sensor 631 Temperature sensor 633 Three-way valve 635 Pressure sensor 701 Storage 703 Container body 705 Lid 707 Mosque container 709 Lid A Dry material A0 Raw material Mosque A1 Semi-moist Mozuku F1 Small-sized lightweight foreign material F2 Large-sized lightweight foreign material G1 Small-sized heavy foreign material G Gap O Mid-point B Connection Point C Contact point L Distance D Dried food LD Production line S0 Thawing step S1 Washing and sorting step S2 Visual sorting step S3 Dehydration step S4 Spraying step S5 Heating / sterilization step S6 Drying step S7 An fumigation step

Claims (2)

A drying chamber main body comprising an opening for storing the material to be dried and a support structure having a weight measuring device for measuring the weight of the material to be dried;
An opening / closing door that is attached to the opening so as to be openable and closable, and forms a shielded space in the drying chamber main body when closed,
A microwave irradiation device that is attached to the drying chamber body and irradiates the object to be dried accommodated in the drying chamber body to dry the object to be dried;
A steam supply device that is connected to the drying chamber body, supplies low-temperature steam of 100 ° C. or less toward the object to be dried contained in the drying chamber body, and heats and sterilizes the object to be dried;
In a vacuum / microwave combined use vacuum decompressor comprising a decompression device that makes the interior of the drying chamber a decompressed atmosphere with the opening closed.
When the door is in the closed state, the seal structure comprising a seal member for the position to the drying chamber to the opposite surface of the drying chamber body and the door of the opening outer side in an airtight state,
Provided on an intermediate path between the opening and the seal structure, and in the circumferential direction so that the first choke located on the opening side and the second choke located on the seal structure side face each other A microwave leakage prevention mechanism of a double choke integrated structure continuously arranged at a predetermined pitch,
In the drying chamber main body, a container support frame provided with an upper surface shielding plate at a lower end portion that supports a container in which an object to be dried is accommodated, and
A base frame provided on the bottom surface in the drying chamber main body, and provided with a bottom shield on the upper end;
A weight measuring device that is provided in a shielding space sandwiched between the upper surface shielding plate and the lower surface shielding plate and measures the weight of an object to be dried housed in the drying chamber main body, is disposed,
A first choke and a first choke of the same shape and the same size are provided on the upper surface shielding plate at the outer periphery of the shielding space where the weight measuring device is disposed , and the tip is bent in an L shape. A double choke in which two chokes are arranged at opposing positions and are continuously arranged at a predetermined pitch in the circumferential direction so that the first choke and the second choke face each other and face the lower shielding plate Integrated microwave effect prevention mechanism is provided,
Outside the shielding space, a microwave shielding panel that covers the upper surface shielding plate, the lower surface shielding plate, and the microwave influence prevention mechanism is disposed so as to shield the shielding space from microwaves. Vapor / microwave combined use vacuum dryer characterized by the construction of The decompression device is a water-sealed vacuum pump that makes the inside of the drying chamber main body a decompressed atmosphere;
The steam / microwave combined use vacuum dryer according to claim 1, characterized by comprising a circulation type water supply / drainage device for supplying / draining water for driving the water-sealed vacuum pump.

Images