Vacuum microwave thawing machine

Abstract

The present invention provides a vacuum microwave thawing machine that improves the stability of stacked tables while enabling uniform microwave irradiation of multiple objects to be thawed placed on them. [Solution] The rotating table 50, which rotates with the object to be thawed placed on it, includes a base table 54 that is rotated by a drive source 52, and one or more stacking tables 56 that are detachably stacked on the base table 54. The stacking table 56 consists of a circular resin table body 66 and a pair of resin legs 68. The pair of legs 68 extend along the outer edge of the table body 66 and have a contact portion 68b that contacts the lower base table 54 or the table body 66 of the stacking table 56 in an arc shape.

Description

Technical Field

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[0003]

[0001] The present invention relates to a vacuum microwave thawing machine.

Background Art

[0002] Conventionally, a vacuum microwave thawing machine that irradiates a thawing object with microwaves in a reduced pressure state (or vacuum state) lower than atmospheric pressure to thaw the thawing object is known, and an example thereof is described in Patent Document 1 below. The vacuum microwave thawing machine can thaw while suppressing temperature unevenness between the surface and the core and without destroying the cells of the food material by repeatedly performing heating by microwaves and sublimation cooling by the reduced pressure state. In order to irradiate the thawing object with microwaves evenly, the vacuum microwave thawing machine described in Patent Document 1 below has a turntable provided in a thawing chamber (chamber) for accommodating the thawing object, and the thawing object is placed on this turntable, and while rotating the thawing object with the turntable, microwaves are irradiated.

[0003] In addition, in order to increase the amount thawed in one operation, for example, as in Patent Document 2 below, a so-called multi-stage turntable having a configuration in which a stacked table (placement net 15) is installed on a base table (ceramic tray 14) rotated by a motor as a drive source may be adopted.

Prior Art Documents

[0006] This invention has been made in view of such circumstances, and aims to provide a vacuum microwave thawing machine that can improve the stability of stacked tables while uniformly irradiating multiple objects to be thawed placed on those tables with microwaves. [Means for solving the problem]

[0007] To solve the above problems, the vacuum microwave thawing machine disclosed in this application has the following structure. (1) A thawing chamber for containing the object to be thawed, A vacuum pump for reducing the pressure inside the thawing chamber, A pressure regulating valve for restoring pressure in the thawing chamber, A microwave generator that generates microwaves to be irradiated into the thawing chamber, A rotating table is provided in the thawing chamber and rotates with the object to be thawed placed on it, Equipped with, The rotary table comprises a base table rotated by a drive source and one or more stacking tables that are detachably stacked on the base table. The aforementioned stacking table consists of a circular, resin-made table body and a pair of resin-made legs. A vacuum microwave thawing machine, wherein a pair of legs extend along the outer edge of the table body and have a contact portion that contacts the lower base table or the table body of the stacking table in an arc shape.

[0008] The vacuum microwave thawing machine disclosed in this application is based on a so-called turntable (rotating table) type vacuum microwave thawing machine, in which the mounting section on which the object to be thawed is placed rotates in order to evenly irradiate the object to be thawed with microwaves irradiated into the thawing chamber. Furthermore, the vacuum microwave thawing machine disclosed in this application is equipped with a multi-stage rotating table in which multiple tables are stacked vertically. The stacked tables need to be stable so as not to tip over even when the base table rotates. According to the vacuum microwave thawing machine disclosed in this application, the stacked table can be stably supported by a pair of legs that have arc-shaped contact parts along the outer edge of the table body. In addition, since the table body and the pair of legs are made of resin, microwaves are not reflected, and microwaves can be effectively irradiated to multiple objects to be thawed placed on any of the stages, making it possible to achieve a uniform thawing state.

[0009] Furthermore, the vacuum microwave thawing machine with the above configuration can be configured in various ways as shown below.

[0010] (2) The vacuum microwave thawing machine according to item (1), wherein the pair of legs are resin plate-shaped members that extend in an arc shape along the outer edge of the table body, and each leg comprises a wall portion that hangs down from the table body and a ground portion that is formed to protrude from the lower end of the wall portion.

[0011] (3) The vacuum microwave thawing machine according to item (2), wherein a pair of legs have openings formed in their walls, and the openings function as gripping parts when the user grips the stacking table.

[0012] (4) The pair of legs has through holes formed in the ground contact portion, The vacuum microwave thawing machine according to (2) or (3), wherein the table body of the base table and the stacking table has a protruding fitting portion that fits into the through hole.

[0013] (5) The stacked table is such that the pair of legs can be attached to and detached from the table body, and the vacuum microwave thawing machine according to any one of items (1) to (4).

Advantages of the Invention

[0014] According to the present invention, it is possible to provide a vacuum microwave thawing machine that can irradiate microwaves evenly onto a plurality of thawing objects placed on the tables while improving the stability of the stacked tables.

Brief Description of the Drawings

[0015] [Figure 1] Perspective view of the vacuum microwave thawing machine of Embodiment 1 [Figure 2] Plan sectional view of the vacuum microwave thawing machine [Figure 3] Front sectional view of the vacuum microwave thawing machine (section III-III in Fig. 2) [Figure 4] Rear sectional view of the vacuum microwave thawing machine (section IV-IV in Fig. 2) [Figure 5] Side sectional view of the vacuum microwave thawing machine (section V-V in Fig. 2) [Figure 6] Perspective view of the rotary table [Figure 7] Perspective view showing the state where the stacked table is removed from the base table [Figure 8] Side sectional view of the stacked table [Figure 9] Perspective view of the stacked table provided in the vacuum microwave thawing machine of Embodiment 2 [Figure 10] Perspective view showing the state where the pair of legs are removed from the stacked table body [Figure 11] Perspective view showing an enlarged view of the attachment part between the stacked table body and the legs [Figure 12] Side sectional view showing an enlarged view of the attachment part between the stacked table body and the legs [Figure 13] Perspective view from above of the stacked table provided in the vacuum microwave thawing machine of Embodiment 3 [Figure 14]Oblique view from below of a stacking table [Figure 15] Perspective view of the stacking table included in the vacuum microwave thawing machine of Embodiment 4 [Figure 16] Side cross-sectional view of a stacking table [Figure 17] Perspective view showing a modified stacking table. [Figure 18] A magnified view of the main part of the modified stacking table. [Modes for carrying out the invention]

[0016] <Embodiment 1> A vacuum microwave thawing machine 10, which is the first embodiment of the present invention, will be described with reference to Figures 1 to 8. In this embodiment, the vacuum microwave thawing machine 10 heats the thawing chamber R1 with microwaves at time intervals while the pressure is reduced, so that the heating by microwaves and sublimation cooling under reduced pressure are repeated, making it possible to thaw food without damaging the cells of the food while suppressing temperature unevenness between the surface and the core. Note that in some parts of the drawings, the symbols F, B, L, R, U, and D are used to indicate directions, and these represent the front side, back side, left side, right side, top side, and bottom side when the vacuum microwave thawing machine 10 is viewed from the front, respectively.

[0017] As shown in Figures 1 to 4, the vacuum microwave thawing machine 10 of this embodiment comprises a box-shaped thawing machine body 11 that is horizontally elongated and rectangular in shape and opens to the front, a door 12 that opens and closes a thawing chamber R1 located to the right of the thawing machine body, a front panel 13 that covers the front of the machine room R2 formed inside the thawing machine body 11, and four casters 14 provided at the four corners on the bottom surface of the thawing machine body. The vacuum microwave thawing machine 10 of this embodiment has a top plate 15 on the top surface of the thawing machine body 11 and is a table type that can be moved by the four casters 14.

[0018] The thawing machine body 11 is equipped with a chamber 20 on its right side. The chamber 20 is made of a metal such as stainless steel and is a roughly rectangular box-shaped body with a front opening 21. The door 12 closes the front opening 21 of the chamber 20, and the chamber 20 and the door 12 form a thawing chamber R1 inside. On the other hand, the thawing machine body 11 has a machine room R2 surrounding the chamber 20. The door 12 is rotatable by a hinge 22 provided on the right end of the front side of the thawing machine body and can be opened to the right. By opening the door 12, the object to be thawed can be placed in or removed from the chamber 20, and the door 12 can be closed in a tight contact with the chamber 20 by a lever 12A provided on the door 12, thereby making the thawing chamber R1 a sealed space.

[0019] As shown in Figures 3, 4, and 5, the vacuum microwave thawing machine 10 of this embodiment includes a vacuum pump (pressure reducer) 30 for reducing the pressure inside the chamber 20 (thawing chamber R1), a first control valve 32 and a second control valve 33 for restoring (increasing) the pressure inside the chamber 20, a magnetron 34 (microwave generator) for generating microwaves, an inverter 35 for controlling the output of the magnetron 34, and a control box 36 for housing control boards and the like. These vacuum pump 30, first control valve 32, second control valve 33, magnetron 34, inverter 35, and control box 36 are located in the machine room R2.

[0020] As shown in Figures 3 and 4, the vacuum pump 30 is connected to the upper left of the rear wall portion 20A of the chamber 20 by piping 37, and sucks air from inside the chamber 20 via piping 37 to reduce the pressure in the thawing chamber R1. On the other hand, the first control valve 32 and the second control valve 33 increase the pressure in the thawing chamber R1 by allowing outside air to flow into the chamber 20. As shown in Figure 4, the first control valve 32 and the second control valve 33 are connected to piping 38 that extends from the rear wall portion 20A of the chamber 20. The piping 38 is branched, and the first control valve 32 and the second control valve 33 are connected to the ends of each branch. Both the first control valve 32 and the second control valve 33 are solenoid valves, but the first control valve 32 can adjust the flow rate, while the second control valve 33 switches between open and closed. In other words, the first control valve 32 is a pressure regulating valve for fine-tuning the pressure in the thawing chamber R1 during the thawing operation, and the second control valve 33 is for rapidly introducing outside air into the thawing chamber R1 after thawing is complete, etc., to return the pressure in the thawing chamber R1 to atmospheric pressure.

[0021] The magnetron 34 is positioned at the rear lower side of the center in the left-right direction of the chamber 20. The magnetron 34 emits microwaves into a metal waveguide 40. The waveguide 40 extends vertically at the rear of the chamber 20, and its tip is connected to the rear wall portion 20A of the chamber 20. An irradiation port 42 is formed approximately in the center of the rear wall portion 20A of the chamber 20, and microwaves propagating through the waveguide 40 are emitted into the chamber 20 from the irradiation port 42. The irradiation port 42 is covered by a lid 44 made of a material that transmits microwaves but blocks the passage of gas, such as glass. This lid 44 allows microwaves to be emitted from the irradiation port 42 into the thawing chamber R1 while the thawing chamber R1 is kept under vacuum.

[0022] The vacuum microwave thawing machine 10 of this embodiment is equipped with a rotary table 50 that rotates with the object to be thawed on it, in order to evenly irradiate the object to be thawed with microwaves emitted into the thawing chamber R1. As shown in Figures 3 and 5, the rotary table 50 is a multi-stage type in which multiple tables are stacked vertically. Specifically, the rotary table 50 is equipped with a motor 52 which is the drive source, a base table 54 at the bottom that is rotated by the motor 52, and two stacking tables 56 that are stacked on top of the base table 54. The configuration of the rotary table 50 will be described in detail below with reference to Figures 6 to 8.

[0023] The base table 54 comprises a shaft 60 that forms the axis of rotation, an annular frame 61 (see Figures 5 and 7) fixed to the upper end of the shaft 60, and a base table body 62 fixed to cover the frame 61. The shaft 60 is held so as to be rotatable around its axis, passing through the bottom surface 20B of the chamber 20, and is rotated by a motor 52 located below the bottom surface 20B.

[0024] Furthermore, up to two stacking tables 56 can be detachably stacked on top of the base table 54 described above. The stacking table 56 consists of a stacking table body 66 and a pair of legs 68. The stacking table body 66 and the pair of legs 68 are made of microwave-transmitting resin, and are molded from, for example, polypropylene or polyethylene. Incidentally, the stacking table body 66 is the same shape (same component) as the base table body 62 described above. In the following description, when referring to both the base table body 62 and the stacking table body 66, they may be referred to as table body 62 and 66.

[0025] Contents of 25HB009 As shown in Figures 7 and 8, the table bodies 62 and 66 are generally dish-shaped, with their outer edges 62a and 66a rising upward from the periphery of the bottom surfaces 62b and 66b. This prevents the thawed object placed on the table bodies 62 and 66 from falling off the table bodies 62 and 66 even if it moves when the rotary table 50 rotates, as it will hit the outer edges 62a and 66a.

[0026] Contents of 25HB007 Furthermore, the bottom surfaces 62b and 66b of the table bodies 62 and 66 have a stepped shape, with the outer periphery being lower than the central portion. The central portion of the bottom surfaces 62b and 66b is a mounting surface 70 for placing the object to be thawed. Multiple circular grooves 70a (three in this embodiment) of different diameters are formed on this mounting surface 70, centered on the center of the table bodies 62 and 66. In this vacuum microwave thawing machine 10, moisture (drip) is released from the object to be thawed during microwave heating, and this drip is sublimated by sublimation cooling. However, if the object to be thawed is in contact with the table bodies 62 and 66, the sublimation of the drip may not proceed well in the contact area, potentially resulting in poor thawing quality. In contrast, the vacuum microwave thawing machine 10 of this embodiment has a plurality of grooves 70a on the mounting surface 70 of the table body 62, 66, which reduces the contact area between the object to be thawed and the table body 62, 66, and allows drip to accumulate in the grooves 70a, thereby enabling effective sublimation of the object to be thawed.

[0027] The outer periphery of the bottom portions 62b and 66b is a connecting portion 72 for connecting the stacking table 56 that will be stacked on top of it. Now, the configuration of the legs 68 of the stacking table 56 will be described in detail. The legs 68 are resin plate-shaped members that extend in an arc along the outer edge of the stacking table body 66. The cross-sectional shape of the legs 68 in the circumferential direction is generally U-shaped, and includes a wall portion 68a that hangs down from the stacking table body 66, a ground contact portion 68b formed in a manner that protrudes from the lower end of the wall portion 68a, and a mounting portion 68c formed in a manner that protrudes from the upper end of the wall portion 68a along the back surface of the stacking table body 66 and is attached to the stacking table body 66. The legs 68 are bonded to the stacking table body 66 at the mounting portion 68c. Each of the pair of legs 68 is fixed at an opposing position with the center of the stacking table body 66 in between.

[0028] Contents of 25HB006 The contact portion 68b of the leg body 68 has elongated holes (through holes) 76 extending in the circumferential direction formed through each end in the circumferential direction. On the other hand, the connecting portion 72 of the table body 62, 66 has a total of four protrusions (fitting portions) 77 that project upward, corresponding to the elongated holes 76 formed in each of the pair of leg bodies 68. When stacking the stacking table 56 on top of the base table 54 or the lower stacking table 56, it can be installed by fitting the protrusions 77 into the elongated holes 76 of each of the pair of leg bodies 68. This ensures that the rotation of the base table 54 is reliably transmitted to the stacking table 56. For example, if the stacking table 56 is simply placed on top of the base table 54 or the lower stacking table 56, and the weight of the thawed items placed on the stacking table 56 is large, the stacking table 56 may not rotate even if the base table 54 rotates, which may result in uneven thawing or burning in some areas. In this embodiment, the vacuum microwave thawing machine 10 ensures that the stacking table 56 rotates reliably together with the base table 54, thus avoiding situations that could lead to a decrease in thawing quality.

[0029] Contents of 25HB001 Furthermore, the contact portion 68b of the leg body 68 extends along the outer edge of the stacking table body 66 and contacts the lower base table 54 or stacking table 56, more specifically, the connecting portion 72 of the table bodies 62 and 66, in an arc shape. Therefore, the vacuum microwave thawing machine 10 of this embodiment can stably support the stacking table body 66. In addition, since the stacking table body 66 and the pair of leg bodies 68 are made of resin, they do not reflect microwaves, and microwaves are effectively irradiated onto the multiple objects to be thawed placed on any of the levels, making it possible to achieve a uniform thawing state.

[0030] Contents of 25HB004 The leg body 68 has an opening 78 formed in the wall portion 68a. This opening 78 is longitudinal and extends in the circumferential direction, and has sufficient width for the user to insert their hand. In other words, this opening 78 functions as a gripping part when the user grips the stacking table 56. Therefore, the vacuum microwave thawing machine 10 of this embodiment can stably grip the stacking table 56 even when the object to be thawed is placed on the stacking table 56, making it easy to set up before thawing and remove after thawing.

[0031] <Embodiment 2> 25HB003 Next, a vacuum microwave thawing machine of the second embodiment will be described. The vacuum microwave thawing machine of the second embodiment differs from the vacuum microwave thawing machine 10 of the first embodiment only in the stacking table that constitutes the rotary table. The stacking table 90 in the vacuum microwave thawing machine of the second embodiment will be described in detail below with reference to Figures 9 to 12.

[0032] In the first embodiment, the stacking table 56 had legs 68 bonded to the stacking table body 66, whereas in the second embodiment, the stacking table 90 has a pair of legs 94 that are detachably attached to the stacking table body 92. The pair of legs 94 comprises a wall portion 96 that hangs down from the stacking table body 92, a ground contact portion 97 formed in an arc shape that protrudes from the lower end of the wall portion 96, and a mounting portion 98 that protrudes from the upper end of the wall portion 96 and is attached to the stacking table body 92. The mounting portion 98 has a shape that protrudes both radially inward and radially outward from the arc-shaped wall portion 96. Furthermore, the edge of the inner overhang portion 98a, which is the radially inward overhang, forms a straight line (chord) connecting both ends in the circumferential direction of the wall surface portion 96, and the edge of the outer overhang portion 98b, which is the radially outward overhang, forms a straight line parallel to the inner overhang portion 98a.

[0033] On the other hand, the stacking table body 92 has a mounting portion 100 on its underside for attaching a pair of legs 94. The mounting portion 100 has an L-shaped cross-section with a hook portion 101 that extends in a direction perpendicular to the radial direction (orthogonal direction) to which the inner protruding portion 98a of the part to be attached 98 is hooked, and the outer protruding portion 98b is secured by a claw portion 102 provided on the radially outer side of the hook portion 101. The mounting portion 100 also has a pair of projections 103 provided on the outer sides of both ends of the part to be attached 98 in the circumferential direction (orthogonal direction), and these projections 103 prevent the part to be attached 98 from shifting in the orthogonal direction, that is, the legs 94 from shifting.

[0034] Therefore, the stacking table 90 according to this embodiment can be easily cleaned because the pair of legs 94 can be easily attached to and detached from the stacking table body 92. For example, the stacking table body 92 and the pair of legs 94 can be placed in a dishwasher or the like, making it possible to keep the stacking table 90 clean.

[0035] <Embodiment 3> 25HB002 Next, a third embodiment of the vacuum microwave thawing machine will be described. The vacuum microwave thawing machine of the third embodiment differs from the vacuum microwave thawing machine 10 of the first embodiment only in the stacking table that constitutes the rotary table. The stacking table 110 in the vacuum microwave thawing machine of the third embodiment will be described in detail below with reference to Figures 13 and 14.

[0036] The stacking table 110 in the third embodiment, like the stacking table 56 in the first embodiment, consists of a microwave-transmitting resin table body 112 and a pair of legs 114. The table body 112 is the same as the table body 66 in the first embodiment, but the legs 114 differ from the legs 68 in the first embodiment. While the legs 68 in the first embodiment were molded from a plate-like member, the legs 114 in the second embodiment are made of a single string-like member connected in a rectangular ring shape and curved in an arc along the outer edge of the table body 112. In other words, the upper side 114a is glued to the underside of the table body 112, the lower side 114b opposite to the upper side 114a functions as a contact point that makes contact with the lower base table 54 or stacking table 110, and the two sides 114c that extend vertically and connect the ends of the upper side 114a and the lower side 114b function as legs that support the table body 112. The contact point 114b is molded to fit almost seamlessly inside the outer edge 112a of the table body 112, which rises upwards, so that it does not move on the lower base table 54 or stacking table 110.

[0037] In this embodiment, although each of the pair of legs 114 of the stacking table 110 is formed from a string-like material, the vacuum microwave thawing machine has a contact portion 114b that extends along the outer edge of the table body 112 and contacts the lower base table 54 or the stacking table 110 in an arc shape. Therefore, similar to the first embodiment, the table body 112 can be stably supported.

[0038] <Embodiment 4> 25HB008 Next, a fourth embodiment of the vacuum microwave thawing machine will be described. The fourth embodiment of the vacuum microwave thawing machine differs from the first embodiment of the vacuum microwave thawing machine 10 only in the stacking table that constitutes the rotary table. The stacking table 120 in the fourth embodiment of the vacuum microwave thawing machine will be described in detail below with reference to Figures 15 and 16.

[0039] The stacking table 120 in the fourth embodiment, like the stacking table 56 in the first embodiment, consists of a microwave-transmitting resin table body 122 and a pair of legs 124. The legs 124 are substantially the same as the legs 68 in the first embodiment, but the table body 122 differs from the table body 66 in the first embodiment. In the first embodiment, the table body 66 had a horizontally formed mounting surface 70 on which the object to be thawed was placed, whereas in the fourth embodiment, the mounting surface 126 of the table body 122 is formed in an inclined shape that slopes downward from the center outward in the radial direction.

[0040] In other words, in this embodiment, the drip from the object to be thawed flows down the mounting surface 126 and accumulates on the outer periphery 127 of the mounting surface 126. Therefore, according to this embodiment, it is possible to avoid a situation in which drip remains between the object to be thawed and the mounting surface 126, which would degrade the thawing quality of the object to be thawed.

[0041] <Other Embodiments> The present invention is not limited to the embodiments described above, and can be implemented in various forms with various modifications and improvements based on the knowledge of those skilled in the art. For example, the following embodiments are also included within the technical scope of the present invention.

[0042] Contents of 25HB005 In the first embodiment described above, the stacking table 56 had an elongated hole (through hole) 76 formed in the ground contact portion 68b of the leg body 68, and a protrusion 77 projecting upward was provided on the connecting portion 72 of the table body 62,66. By inserting the protrusion 77 into the elongated hole 76, relative rotation was restricted, ensuring that the rotation of the base table 54 was reliably transmitted to the stacking table 56. In contrast, as shown in the modified stacking table 130 in Figures 17 and 18, the ground contact portion 131a of the leg body 131 does not have a through hole, and a protrusion 133 is provided on the connecting portion 132a of the table body 132 at positions that sandwich both ends of the ground contact portion 131a of the leg body 131 in the circumferential direction. Incidentally, the second to fourth embodiments do not describe a configuration that restricts relative rotation like the stacking table 56 of the first embodiment or the modified stacking table 130, but it is possible to adopt either of them.

[0043] In the above embodiment, the configuration allowed for stacking two stacking tables 56 on top of the base table 54. However, by using, for example, legs 68 with a lower height, it is possible to stack three or more stacking tables.

[0044] In the above embodiment, the vacuum microwave thawing machine had a horizontally elongated shape with the machine room R2 located next to the thawing chamber R1. However, the machine room may be located below the thawing chamber, resulting in a vertically elongated shape. [Explanation of Symbols]

[0045] 10…Vacuum microwave thawing machine (Embodiment 1), R1…Thawing chamber, 30…Vacuum pump [pressure reducer], 32…First control valve [pressure regulating valve], 34…Magnetron [microwave generator], 50…Rotating table, 52…Motor [drive source], 54…Base table, 56…Stacking table, 66…Stacking table body, 68…Legs, 68a…Wall surface, 68b…Grounding part, 76…Slotted hole [through hole], 77…Protrusion [fitting part], 78…Opening, 90…Stacking table (Embodiment 2), 92…Stacking table body, 94…Legs, 96…Wall surface, 97…Grounding part, 98…Mounted part, 100…Mounting part, 110…Stacking table (Embodiment 3), 112…Table body, 114…Legs, 114b…Lower side [Grounding part]

Claims

1. A thawing chamber for containing the object to be thawed, A vacuum pump for reducing the pressure inside the thawing chamber, A pressure regulating valve for restoring pressure in the thawing chamber, A microwave generator that generates microwaves to be irradiated into the thawing chamber, A rotating table is provided in the thawing chamber and rotates with the object to be thawed placed on it, Equipped with, The rotary table comprises a base table rotated by a drive source and one or more stacking tables that are detachably stacked on the base table. The aforementioned stacking table consists of a circular, resin-made table body and a pair of resin-made legs. A vacuum microwave thawing machine, wherein a pair of legs extend along the outer edge of the table body and have a contact portion that contacts the lower base table or the table body of the stacking table in an arc shape.

2. The vacuum microwave thawing machine according to claim 1, wherein the pair of legs are resin plate-shaped members that extend in an arc shape along the outer edge of the table body, and each leg comprises a wall portion hanging down from the table body and a ground portion formed to protrude from the lower end of the wall portion.

3. The vacuum microwave thawing machine according to claim 2, wherein a pair of legs have openings formed in their wall surfaces, and these openings function as gripping parts when a user grips the stacking table.

4. The pair of legs have through holes formed in the ground contact portion. The vacuum microwave thawing machine according to claim 2 or 3, wherein the table body of the base table and the stacking table has a protruding fitting portion that fits into the through hole.

5. The vacuum microwave thawing machine according to any one of claims 1 to 3, wherein the stacking table is detachably attached to the table body by a pair of legs.

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