JPH06159684A - Vacuum thawing apparatus - Google Patents

Abstract

PURPOSE:To provide a vacuum thawing apparatus in which a frozen matter can be thawed in a satisfactory state without deforming a matter to be thawed and without scattering about it when a sealed vessel is returned from a pressure reduced state to an atmospheric pressure state at the time of finishing thawing for microwave-heating the frozen matter to vacuum thaw it in the pressure- reduced vessel. CONSTITUTION:An air suction port 7 for introducing the air into a sealed vessel 1 of a pressure-reduced state by a vacuum pump 12 to return it to an atmospheric pressure state is provided at a sidewall of the vessel 1, and an air suction tube 9 and a valve 10 are connected to the port 7 outside the vessel 1. A cap 8 for altering a flow of the air is provided at the port 7 inside the vessel 1 to alter the air flowing into the vessel 1 at the time of finishing thawing in an avoiding direction for not bringing the air into direct contact with a frozen matter 3 contained in the vessel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum thawing apparatus for heating a frozen body by applying a microwave to a decompressed closed container.

[0002]

2. Description of the Related Art Conventionally, in this type of vacuum defroster,
On the side wall of the closed container 21 for storing the frozen body 23, an air intake port 27 for taking air into the closed container 21 depressurized by a vacuum pump 32 and returning it to the atmospheric pressure state.
However, the mounting position is not particularly limited, and some of them are mounted almost at the center of the side wall.

A conventional vacuum thawing apparatus will be described below with reference to FIG.

As shown in FIG. 5, a door 22 is provided at the opening of the closed container 21 so as to be openable and closable, and a plate 24 in which a frozen body 23 is stored is provided in the closed container 21. Closed container 2
A magnetron 26 is joined to 1 via a waveguide 25. An air intake port 27 is provided on the side wall of the closed container 21, and a pipe 29 is connected to the air intake port 27 outside the closed container 21 substantially vertically to the side wall.
The pipe 29 is provided with a valve 30 for shutting off air from the closed container 21. Also,
Another pipe 31 is branched and connected to a pipe 29 portion of the closed container 21 side of the valve 30 and communicates with a vacuum pump 32.

[0005]

However, in the vacuum thawing apparatus as described above, when the valve 30 is opened and the closed container 21 in the depressurized state is returned to the atmospheric pressure state after the thawing is completed, the state shown in FIG. 5 is shown. As described above, the air may flow straight and vigorously through the air inlet 27 into the closed container 21 through the pipe 29, and the flowing air may directly hit the frozen body 23. At this time, the frozen body 23 is already in a defrosted state and has become soft, and therefore, if air is blown vigorously onto this, the defrosted body may be deformed or a part of the defrosted body may scatter. May occur.

The present invention has been made in order to solve the above-mentioned problems, and at the end of thawing, even if the closed container is returned from the depressurized state to the atmospheric pressure state, the object to be defrosted is deformed or scattered. It is an object of the present invention to provide a vacuum thawing device that can end thawing in a good state without any problems.

[0007]

In order to achieve this object, the vacuum defrosting apparatus of the present invention has an air inlet for taking air into a closed container whose pressure is reduced by a pressure reducing means and returning it to an atmospheric pressure state. And an air suction pipe that is connected to the air suction port and that sends air into the closed container, and a valve that is provided in the air suction pipe and that shuts off air from the closed container. When the valve is opened to return the inside of the closed container to the atmospheric pressure state,
Air flowing into the closed container from the air inlet,
The frozen body stored in the closed container is introduced so as not to directly come into contact with the frozen body.

Further, near the air intake port in the closed container, there is provided a flow path changing means for changing the air flowing from the air intake port into the closed container so as not to directly hit the frozen body. It is a thing.

[0009]

In the vacuum thawing apparatus of the present invention having the above-mentioned structure, the air suction port is for taking air into the airtight container whose pressure is reduced by the pressure reducing means and returning it to the atmospheric pressure state. The air suction pipe is for feeding air into the closed container, and is connected to the air suction port.
A valve is provided in the air intake pipe, and the valve is
This is for shutting off air from the closed container, and is closed when the frozen body is thawed, and opened when the frozen body is finished. The flow path changing means is provided near the air intake port in the closed container, and when the thawing is completed, the air flowing into the closed container from the air intake port is stored in the closed container as a frozen body. Change the direction to avoid so that it does not hit directly.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a door 2 is provided at the opening of the closed container 1 so as to be openable and closable, and a plate 4 on which a frozen body 3 is placed is provided in the closed container 1. An air intake port 7 is provided on the side wall of the closed container 1, and a cap 8 as a flow path changing unit for changing the flow of air is attached to the air intake port 7 inside the closed container 1. The cap 8 is provided with a pair of discharge ports 8A, 8B for changing the direction of the air that has flowed in horizontally into a substantially vertical direction so as to prevent the air from directly hitting the frozen body. As shown in FIG. 2, the cap 8 and the air intake port 7 are threaded, and they are joined by a screwing method. The pair of discharge ports 8 depends on the degree of screwing and other factors.
A and 8B may face the vertical direction as shown in FIGS. 1 and 2, or may face the direction penetrating the paper surface or the diagonal direction.

On the other hand, an air intake pipe 9 is connected to the air intake port 7 on the outside of the closed container 1, and the air intake pipe 9 is further provided with a valve 10 for shutting off air from the closed container 1. It is provided. Further, another pipe 11 is branched and connected to the air suction pipe 9 closer to the closed container 1 than the valve 10 and communicates with a vacuum pump 12 as a pressure reducing means.
Then, a magnetron 6 as a microwave generating means is joined above the closed container 1 via a waveguide 5.

Next, the operation will be described.

After the frozen body 3 is microwave-heated in the closed container 1 whose pressure is reduced by the vacuum pump 12, the valve 10 is opened to return the inside of the closed container 1 in the reduced pressure state to the atmospheric pressure state. Flow into the closed container 1 through the air suction pipe 9 and the air suction port 7. In this embodiment, FIG.
As shown in FIG. 3, a cap 8 that forms a flow path is attached to the air intake port 7 in a direction that avoids the air flowing in from the air intake port 7 from directly hitting the frozen body 3 stored in the closed container 1. Since the air flowing into the closed container 1 is converted into a substantially right-angled direction as shown by the arrow and flows in from the pair of discharge ports 8A, 8B, the air does not directly hit the defrosted body. Therefore, the object to be thawed is not deformed or scattered by wind pressure.
Further, since the cap 8 can be attached and detached by the screwing method, the vicinity of the air intake port 7 can be easily cleaned.

Next, a second embodiment will be described with reference to FIG.

In the second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 3, an air intake port 7 is provided at a position lower than the frozen body 3 stored in the closed container 1.

By doing so, even when air flows straight into the closed container 1 when the inside of the closed container 1 in a depressurized state is returned to the atmospheric pressure state, the flow of the air freezes as shown by the arrow. Since it occurs at a position lower than body 3,
The air flowing in does not directly contact the object to be defrosted.

The present invention is not limited to the embodiments described in detail above, and various modifications can be made without departing from the spirit of the invention.

For example, in the second embodiment, the position of the air intake port 7 avoids the air flowing into the closed container 1 from directly hitting the frozen body 3, but the second embodiment of the present invention. As shown in FIG. 4 showing the third embodiment, by configuring the air suction pipe 9 at an acute angle with respect to the side wall of the closed container 1 in the vicinity of the connection portion with the air suction port 7,
Even if the air suction port 7 is attached near the center of the side wall, the air flowing into the closed container 1 can be supplied to the frozen body 3.
It is also possible to avoid so as not to hit directly.

[0021]

As is apparent from the above description,
The vacuum thawing device of the present invention does not directly apply the air flowing into the closed container from the air suction port to the frozen body stored in the closed container when returning the inside of the closed container in the reduced pressure state to the atmospheric pressure state. As described above, the thawing is introduced so that there is an effect that the thawing can be finished in a good state without deforming or scattering the object to be thawed.

[Brief description of drawings]

FIG. 1 is a structural schematic diagram of a vacuum defrosting apparatus according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the essential parts of the first embodiment of the present invention.

FIG. 3 is a structural schematic diagram of a vacuum defrosting device according to a second embodiment of the present invention.

FIG. 4 is a structural schematic diagram of a vacuum defrosting device according to a third embodiment of the present invention.

FIG. 5 is a schematic structural view of a conventional vacuum defroster.

[Explanation of symbols]

 1 Airtight container 6 Magnetron 7 Air intake port 8 Cap 9 Air intake pipe 10 Valve 12 Vacuum pump

Claims (2)

[Claims] 1. A closed container in which a frozen body can be stored, a microwave generation unit for irradiating the frozen body in the closed container with microwaves, and a decompression unit for reducing the pressure in the closed container in relation to microwaves. An air suction port for taking air into the airtight container which has been depressurized by the depressurizing means and returning it to the atmospheric pressure state; and an air which is connected to the air suction port and sends air into the airtight container. A vacuum thawing device comprising a suction pipe and a valve provided in the air suction pipe for shutting off air to the closed container, wherein the closed container in a depressurized state is returned to an atmospheric pressure state. When the valve is opened, the air flowing into the closed container from the air inlet is introduced so as not to directly hit the frozen body stored in the closed container. Vacuum defrosting device. 2. A flow path changing means near the air intake port in the closed container for changing the air flowing from the air intake port into the closed container so as not to directly hit the frozen body. The vacuum thawing device according to claim 1, wherein the vacuum thawing device is provided.