JP2019095091A - Electric field processing refrigerator - Google Patents

Abstract

To provide an electric field processing refrigerator showing no possibility of electric shock.SOLUTION: There is provided an electric conductive middle frame of cooling air permeable feature arranged between a cooling air non-permeable electric outer frame and a cooling air permeable electric inner frame of cooling air permeable feature stored in the electric conductive outer frame to cause storage materials such as foods and the like to be stored, the electric conductive outer frame and the electric conductive inner frame are grounded and high voltage is applied between the electric conductive outer frame and the electric conductive middle frame. Since the electric conductive outer frame and the electric conductive inner frame are grounded, even if a worker for performing either storing operation or taking-out operation of storage goods contacts with the frames, the worker does not receive any electric shock. Further, in order to reduce risk of the electric shock, the electric conductive middle frame is sealed. In addition, an electric conductive door is not required at the storing/taking-out ports and it becomes possible to make the storing/taking-out ports by glass door.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electric field treatment refrigerator which applies an electric field when storing food or the like under refrigeration.

  There is an electric field treatment refrigerator which performs electric field treatment refrigeration of food etc. by applying an electric field by commercial alternating current over 6000 V when refrigerated storage of food etc.

  The freezing point (freezing point) of the stored water drops to about -8 ° C in the refrigerator to which the electric field by the commercial alternating current high voltage is applied. Using this phenomenon, food and the like are stored at a low temperature of 0 ° C. or lower without freezing.

Foods and the like stored without freezing at a low temperature of 0 ° C. or less can suppress bacterial growth and avoid undesired deterioration.
A prior art electric field processing refrigerator will be described with reference to FIGS. 1 and 2.

FIG. 1 is a structural conceptual view of the electric field processing refrigerator of Japanese Patent No. 5593235, and (a) is a top cross-sectional view of (b) cut by line A-A, (b) is a line B-B of (a) It is a front sectional view cut.
This electric field processing refrigerator has an outer housing and an inner housing, and a high voltage commercial alternating current is applied between the outer housing and the inner housing. At this time, the outer casing is grounded for safety.

In FIG. 1, reference numeral 1 denotes an outer casing made of a metal plate such as stainless steel and having a rectangular parallelepiped shape whose front is open.
An inner case 2 made of a metal such as stainless steel having a rectangular parallelepiped shape and an open front and made of metal such as stainless steel is made of a stainless steel wire mesh or a stainless steel perforated plate to ensure air permeability.

The inner casing 2 is housed in the outer casing 1 with a space therebetween via the insulating spacer 5, and the outer casing 1 and the inner casing 2 are electrically separated by the insulating spacer 5.
The heat-resistant insulating spacer 5 is attached to each of the four corners of the upper and lower portions of the inner casing 2 to regulate the distance to the outer casing.

An outer door 3 and an inner door 4 respectively corresponding to the outer housing 1 and the inner housing 2 are provided.
The outer door 3 is formed of a stainless steel plate or the like in the same manner as the outer casing 1, and the inner door 4 is formed of a stainless steel wire mesh or a stainless steel perforated plate to ensure air permeability similarly to the inner casing 2.
During the electric field treatment, the outer door 3 and the inner door 4 are closed, at which time the outer door 3 is electrically connected to the outer housing 1 and the inner door 4 is connected to the inner housing 2.

  A commercial alternating current high voltage of 6800 V is supplied from the power supply device 6 between the outer housing 1 and the inner housing 2 by boosting the commercial AC power supply with a transformer.

  A cooling device for refrigeration is disposed on the inner side of the outer housing 1 and on the outer upper part of the inner housing 2. There is no special meaning to place the cooling device on the outside upper part of the inner casing 2 and it can be disposed at an appropriate position convenient for implementation.

FIG. 2 is a structural conceptual view of the improved electric field processing refrigerator of International Publication WO 2014/042227, wherein (a) is a top sectional view and (b) is a front sectional view.
In this electric field treatment refrigerator, a high voltage commercial alternating current is applied between the outer housing and the inner housing, and further, the middle housing is not electrically connected to either of the housing between the outer housing and the inner housing. have.
At this time, the outer casing 1 is grounded for safety.

In FIG. 2, reference numeral 1 denotes an outer casing made of a metal plate such as stainless steel and having a rectangular parallelepiped shape and an open front.
Reference numeral 2 denotes an inner case made of metal such as stainless steel having a rectangular parallelepiped shape and an open front and made of a stainless steel mesh or a stainless steel perforated plate.

The reference numeral 7 designates a rectangular parallelepiped open front, and an inner case made of metal such as stainless steel disposed between the outer case and the inner case, and is made of a stainless steel wire mesh or a stainless steel perforated plate.
An insulating spacer 5 is interposed between the outer casing 1 and the middle casing 7, and an insulating spacer 9 is interposed between the middle casing 7 and the inner casing 2, and the outer casing 1, the middle casing 7, the inside The housing 2 is electrically separated.
The insulating spacer 5 is attached to each of the four corners of the upper and lower portions of the inner casing 2 to limit the distance to the casing, and the insulating spacer 9 is attached to each of the four corners of the upper and lower portions of the inner casing 2 Regulating the space to the middle case.

An outer door 3, a middle door 8 and an inner door 4 corresponding to the outer casing 1, the middle casing 9 and the inner casing 2 are provided.
The outer door 3 is made of stainless steel in the same manner as the outer casing 1, and the middle door 8 and the inner door 4 are made of stainless steel mesh or a stainless steel perforated plate to ensure air permeability in the same manner as the inner casing 2. .
During electric field refrigeration, the outer door 3, the middle door 8 and the inner door 4 are closed, at which time the outer door 3 is for the outer case 1, the middle door 8 is for the middle case 7, and the inner door 4 is the inner case 2 Electrically connected to

  A commercial alternating current high voltage of 6800 V boosted by a transformer from a commercial alternating current power supply is supplied from the power supply 6 between the outer housing 1 and the inner housing 2.

  A cooling device for refrigeration is disposed on the inner side of the outer housing 1 and on the outer upper part of the inner housing 2. There is no special meaning to place the cooling device on the outside upper part of the inner casing 2 and it can be disposed at an appropriate position convenient for implementation.

  Since the outer casing 1 and the outer door 3 are places touched by the user, they are grounded as a measure against electric shock.

Patent 5593235 gazette International Publication WO 2014/042271

In the conventional electric field treatment refrigerator shown in FIG. 1 and FIG. 2, since it is necessary to ground the outer container exposed to the outside, a high voltage for electric field treatment is applied to the inner container.
Such a high applied voltage may cause an electric shock, and the door needs to be closed during electric field treatment, and the applied power needs to be shut off when storing and removing food or the like.
Therefore, there is a problem that it is not only troublesome to shut off the applied voltage at the time of storing and taking out the food to be processed, but also the situation of the stored food can not be monitored.

  In this application, there is no need to shut off the applied voltage in order to prevent an electric shock when storing and taking out food, and to obtain an electric field treatment refrigerator which can monitor the appearance of the stored food. It will be an issue.

In order to solve the above problems, in this application, the structure of the electric field processing refrigerator shown in FIG. 2 is used, and the inner case is connected to the grounded outer case, and the middle case and the outer case are Supply high voltage between.
Also, enclose the middle case so that the operator can not touch the middle container when high voltage is supplied.
The high voltage supplied for the electric field treatment may be either a DC high voltage power supply described in Japanese Patent Application No. 2017-203520 or a high frequency medium voltage power supply disclosed in Japanese Patent Application No. 2017-20877, in addition to the conventional commercial AC power supply.

In the electric field treatment refrigerator according to the present invention, a high voltage electric field is formed between the middle case and the outer case and between the middle case and the inner case by supplying the high voltage to the middle case. The desired electric field treatment is performed.
In the electric field treatment refrigerator according to the present invention, since the middle case to which the high voltage is applied is surrounded by the outer case and the inner case and not exposed, the worker does not get an electric shock due to the high voltage.
In the electric field treatment refrigerator according to the present invention, the water in the plastic bottle during electric field treatment does not freeze even at -7 ° C.
In addition, the effect of the electric field treatment continued even after the electric field treatment, and the water in the PET bottle subjected to the electric field treatment for 72 hours at -7 ° C was stored for 3 weeks in the refrigerator at -7 ° C without electric field treatment. It was not.

FIG. 1 is a top cross-sectional view, a front cross-sectional view, and a partially enlarged view of a prior art electric field processing refrigerator. FIG. 2 is a top cross-sectional view, a front cross-sectional view, and a partially enlarged view of another electric field processing refrigerator of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS The top sectional drawing and the elements on larger scale of the electric field processing refrigerator of this invention Example 1. FIG. The top sectional drawing and the elements on larger scale of the electric field processing refrigerator of this invention Example 2. FIG. The top sectional drawing and the elements on larger scale of the electric field processing refrigerator of this invention Example 3. FIG. The top sectional drawing of the electric field processing refrigerator of this invention Example 4, a partial enlarged view, and a partial re-enlarged view. The top sectional drawing and the elements on larger scale of the electric field processing refrigerator of this invention Example 5. FIG. The top sectional drawing and the elements on larger scale of the electric field processing refrigerator of this invention Example 6. FIG. The top sectional drawing and the elements on larger scale of the electric field processing refrigerator of this invention Example 7. FIG. The top sectional drawing of the electric field processing refrigerator of this invention Example 8, a partial enlarged view, and a partial re-enlarged view. Explanatory drawing of the conventional commercial alternating current power supply device used by this invention. It is a power supply device described in Japanese Patent Application No. 2017-213461 used in the present invention. It is another power supply described in Japanese Patent Application No. 2017-213461 used in the present invention. It is a power supply device described in Japanese Patent Application No. 2017-213460 used in the present invention. It is another power supply described in Japanese Patent Application No. 2017-213460 used in the present invention. It is another power supply described in Japanese Patent Application No. 2017-213460 used in the present invention. It is another power supply described in Japanese Patent Application No. 2017-213460 used in the present invention.

  Examples of the invention according to this application will be described below.

FIG. 3 shows an electric field processing refrigerator of Example 1 for explaining the basic configuration of the invention according to the present application.
In this figure, (a) is an entire configuration front sectional view of the electric field treatment refrigerator of Example 5, and (b) is an entire configuration top sectional view of the electric field treatment refrigerator. The front cross-sectional view of (a) is a cross-sectional view taken along the line B-B of (b), and the top cross-sectional view of the (a) is a cross-sectional view taken along the line A-A of (a).
(C) is an enlarged sectional view of a portion indicated by a circle C in (a), and (d) is an enlarged sectional view of a portion indicated by a circle D in (a).

In (a), reference numeral 11 denotes an outer casing made of a stainless steel plate or the like in a rectangular parallelepiped shape whose front is open.
Reference numeral 12 denotes a rectangular parallelepiped whose front face is open, and is a middle case made of stainless steel mesh or stainless punching metal so that the cooling air can be transmitted.
The reference numeral 13 denotes a rectangular parallelepiped whose front face is open, and is an inner casing made of stainless steel mesh or stainless punching metal so that the cooling air can pass therethrough.

The middle case 12 is housed in the outer case 11 in a nested structure with a space between the inner case 12 and the insulating spacer 16 interposed therebetween, and the middle case 12 and the outer case 11 are electrically separated.
The inner case 13 is housed in the inner case 12 in a nested structure at an interval with an insulating spacer 17 interposed therebetween, and the inner case 13 and the middle case 12 are electrically separated.

From the high voltage power supply 18 between the outer case 11 and the middle case 12, commercial alternating current high voltage, direct current high voltage power source as described in Japanese Patent Application No. 2017-213460, direct current high voltage source as described in Japanese Patent Application No. 2017-213461 Or a high voltage of direct current is supplied.
Specifically, one of the high voltage power supplies 18 is connected to the middle case 12, the other is grounded, and the outer casing 11 is grounded. The inner casing 13 is grounded by being connected to the outer casing by any means.
The upper edge of the middle case 11 is disposed deeper than the edge of the outer case 11 and the edge of the inner case so that the worker does not touch it directly.

FIG. 4 shows an electric field processing refrigerator of Example 2 for explaining the basic configuration of the invention according to the present application.
In this figure, (a) is a front sectional view of the entire configuration of the electric field treatment refrigerator of Example 2, (b) is an enlarged sectional view of a portion shown by circle B in (a), (c) is a circle in (a) It is an expanded sectional view of a portion shown by C.

In (a), reference numeral 11 denotes an outer casing made of a stainless steel plate or the like in a rectangular parallelepiped shape whose front is open.
Reference numeral 12 denotes a rectangular parallelepiped whose front face is open, and is a middle case made of stainless steel mesh or stainless punching metal so that the cooling air can be transmitted.
The reference numeral 13 denotes a rectangular parallelepiped whose front face is open, and is an inner casing made of stainless steel mesh or stainless punching metal so that the cooling air can pass therethrough.

  A projecting edge 19 is formed on the inside of the outer casing 11 at the position of the door 15 in order to prevent an electric shock accident in which the operator touches the middle electrode 12 to which a high voltage is applied.

The middle case 12 is housed in the outer case 11 in a nested structure with a space between the inner case 12 and the insulating spacer 16 interposed therebetween, and the middle case 12 and the outer case 11 are electrically separated.
The inner case 13 is housed in the inner case 12 in a nested structure at an interval with an insulating spacer 17 interposed therebetween, and the inner case 13 and the middle case 12 are electrically separated.

From the high voltage power supply 18 between the outer case 11 and the middle case 12, commercial alternating current high voltage, direct current high voltage power source as described in Japanese Patent Application No. 2017-213460, direct current high voltage source as described in Japanese Patent Application No. 2017-213461 Or a high voltage of direct current is supplied.
Specifically, one of the high voltage power supplies 18 is connected to the middle case 12, the other is grounded, and the outer casing 11 is grounded. The inner casing 13 is grounded by being connected to the outer casing by any means.

FIG. 5 shows an electric field processing refrigerator of Example 3 for explaining the basic configuration of the invention according to the present application.
In this figure, (a) is a front sectional view of the entire configuration of the electric field processing refrigerator of Example 7, (b) is an enlarged sectional view of a portion shown by circle B in (a), (c) is a circle in (a) It is an expanded sectional view of a portion shown by C.

In (a), reference numeral 11 denotes an outer casing made of a stainless steel plate or the like in a rectangular parallelepiped shape whose front is open.
Reference numeral 12 denotes a rectangular parallelepiped whose front face is open, and is a middle case made of stainless steel mesh or stainless punching metal so that the cooling air can be transmitted.
The reference numeral 13 denotes a rectangular parallelepiped whose front face is open, and is an inner casing made of stainless steel mesh or stainless punching metal so that the cooling air can pass therethrough.

  A projecting edge 20 is formed on the outside of the inner casing 13 at the position of the door 15 in order to prevent an electric shock accident in which a worker touches the middle electrode 12 to which a high voltage is applied.

The middle case 12 is housed in the outer case 11 in a nested structure with a space between the inner case 12 and the insulating spacer 16 interposed therebetween, and the middle case 12 and the outer case 11 are electrically separated.
The inner case 13 is housed in the inner case 12 in a nested structure at an interval with an insulating spacer 17 interposed therebetween, and the inner case 13 and the middle case 12 are electrically separated.

From the high voltage power supply 18 between the outer case 11 and the middle case 12, commercial alternating current high voltage, direct current high voltage power source as described in Japanese Patent Application No. 2017-213460, direct current high voltage source as described in Japanese Patent Application No. 2017-213461 Or a high voltage of direct current is supplied.
Specifically, one of the high voltage power supplies 18 is connected to the middle case 12, the other is grounded, and the outer casing 11 is grounded. The inner casing 13 is grounded by being connected to the outer casing by any means.

FIG. 8 shows an electric field treatment refrigerator of Example 4 for explaining the basic configuration of the invention according to the present application.
In this figure, (a) is a front sectional view of the entire configuration of the electric field processing refrigerator of Example 8, (b) is an enlarged sectional view of a portion shown by circle B in (a), (c) is a circle in (a) It is an expanded sectional view of a portion shown by C.

In (a), reference numeral 11 denotes an outer casing made of a stainless steel plate or the like in a rectangular parallelepiped shape whose front is open.
Reference numeral 12 denotes a rectangular parallelepiped whose front face is open, and is a middle case made of stainless steel mesh or stainless punching metal so that the cooling air can be transmitted.
The reference numeral 13 denotes a rectangular parallelepiped whose front face is open, and is an inner casing made of stainless steel mesh or stainless punching metal so that the cooling air can pass therethrough.

  In order to prevent an electric shock accident in which a worker touches the middle electrode 12 to which a high voltage is applied, the end of the middle case 12 at the position of the inner door 15 is covered with an insulator.

The middle case 12 is housed in the outer case 11 in a nested structure with a space between the inner case 12 and the insulating spacer 16 interposed therebetween, and the middle case 12 and the outer case 11 are electrically separated.
The inner case 13 is housed in the inner case 12 in a nested structure at an interval with an insulating spacer 17 interposed therebetween, and the inner case 13 and the middle case 12 are electrically separated.

From the high voltage power supply 18 between the outer case 11 and the middle case 12, commercial alternating current high voltage, direct current high voltage power source as described in Japanese Patent Application No. 2017-213460, direct current high voltage source as described in Japanese Patent Application No. 2017-213461 Or a high voltage of direct current is supplied.
Specifically, one of the high voltage power supplies 18 is connected to the middle case 12, the other is grounded, and the outer casing 11 is grounded. The inner casing 13 is grounded by being connected to the outer casing by any means.

FIG. 7 shows an electric field processing refrigerator of Example 5 for explaining the basic configuration of the invention according to the present application.
In this figure, (a) is an entire configuration front sectional view of the electric field treatment refrigerator of Example 5, and (b) is an entire configuration top sectional view of the electric field treatment refrigerator. The front cross-sectional view of (a) is a cross-sectional view taken along the line B-B of (b), and the top cross-sectional view of the (a) is a cross-sectional view taken along the line A-A of (a).
(C) is an enlarged sectional view of a portion indicated by a circle C in (a), and (d) is an enlarged sectional view of a portion indicated by a circle D in (a).

In (a), reference numeral 11 denotes an outer casing made of a stainless steel plate or the like in a rectangular parallelepiped shape whose front is open.
Reference numeral 12 denotes a rectangular parallelepiped whose front face is open, and is a middle case made of stainless steel mesh or stainless punching metal so that the cooling air can be transmitted.
The reference numeral 13 denotes a rectangular parallelepiped whose front face is open, and is an inner casing made of stainless steel mesh or stainless punching metal so that the cooling air can pass therethrough.

An outer door 14 and an inner door 15 respectively corresponding to the outer housing 11 and the inner housing 12 are provided.
The outer door 14 is made of a metal plate of stainless steel or the like as the outer casing 11, and the inner door 15 is made of a stainless steel mesh or a stainless steel perforated plate like the inner casing 12.
During electric field refrigeration, the outer door 14 and the inner door 15 are closed, at which time the outer door 14 is electrically connected to the outer housing 12 and the inner door 15 is connected to the inner housing 12.

The middle case 12 is housed in the outer case 11 in a nested structure with a space between the inner case 12 and the insulating spacer 16 interposed therebetween, and the middle case 12 and the outer case 11 are electrically separated.
The inner case 13 is housed in the inner case 12 in a nested structure at an interval with an insulating spacer 17 interposed therebetween, and the inner case 13 and the middle case 12 are electrically separated.

From the high voltage power supply 18 between the outer case 11 and the middle case 12, commercial alternating current high voltage, direct current high voltage power source as described in Japanese Patent Application No. 2017-213460, direct current high voltage source as described in Japanese Patent Application No. 2017-213461 Or a high voltage of direct current is supplied.
Specifically, one of the high voltage power supplies 18 is connected to the middle case 12, the other is grounded, and the outer casing 11 is grounded. The inner casing 13 is grounded by being connected to the outer casing by any means.

FIG. 8 shows an electric field processing refrigerator of Example 6 for explaining the basic configuration of the invention according to the present application.
In this figure, (a) is a front sectional view of the entire configuration of the electric field processing refrigerator of Example 6, (b) is an enlarged sectional view of a portion shown by circle B in (a), (c) is a circle in (a) It is an expanded sectional view of a portion shown by C.

In (a), reference numeral 11 denotes an outer casing made of a stainless steel plate or the like in a rectangular parallelepiped shape whose front is open.
Reference numeral 12 denotes a rectangular parallelepiped whose front face is open, and is a middle case made of stainless steel mesh or stainless punching metal so that the cooling air can be transmitted.
The reference numeral 13 denotes a rectangular parallelepiped whose front face is open, and is an inner casing made of stainless steel mesh or stainless punching metal so that the cooling air can pass therethrough.

  A projecting edge 19 is formed on the inside of the outer casing 11 at the position of the door 15 in order to prevent an electric shock accident in which the operator touches the middle electrode 12 to which a high voltage is applied.

  In order to prevent an electric shock accident in which a worker touches the middle electrode 12 to which a high voltage is applied, as shown in (d), the end of the middle case 12 at the position of the inner door 15 is covered with an insulator.

An outer door 14 and an inner door 15 respectively corresponding to the outer housing 11 and the inner housing 12 are provided.
The outer door 14 is made of a metal plate of stainless steel or the like as the outer casing 11, and the inner door 15 is made of a stainless steel mesh or a stainless steel perforated plate like the inner casing 12.
During electric field refrigeration, the outer door 14 and the inner door 15 are closed, at which time the outer door 14 is electrically connected to the outer housing 12 and the inner door 15 is connected to the inner housing 12.

The middle case 12 is housed in the outer case 11 in a nested structure with a space between the inner case 12 and the insulating spacer 16 interposed therebetween, and the middle case 12 and the outer case 11 are electrically separated.
The inner case 13 is housed in the inner case 12 in a nested structure at an interval with an insulating spacer 17 interposed therebetween, and the inner case 13 and the middle case 12 are electrically separated.

From the high voltage power supply 18 between the outer case 11 and the middle case 12, commercial alternating current high voltage, direct current high voltage power source as described in Japanese Patent Application No. 2017-213460, direct current high voltage source as described in Japanese Patent Application No. 2017-213461 Or a high voltage of direct current is supplied.
Specifically, one of the high voltage power supplies 18 is connected to the middle case 12, the other is grounded, and the outer casing 11 is grounded. The inner casing 13 is grounded by being connected to the outer casing by any means.

FIG. 9 shows an electric field treatment refrigerator of Example 7 for explaining the basic configuration of the invention according to the present application.
In this figure, (a) is a front sectional view of the entire configuration of the electric field processing refrigerator of Example 7, (b) is an enlarged sectional view of a portion shown by circle B in (a), (c) is a circle in (a) It is an expanded sectional view of a portion shown by C.

In (a), reference numeral 11 denotes an outer casing made of a stainless steel plate or the like in a rectangular parallelepiped shape whose front is open.
Reference numeral 12 denotes a rectangular parallelepiped whose front face is open, and is a middle case made of stainless steel mesh or stainless punching metal so that the cooling air can be transmitted.
The reference numeral 13 denotes a rectangular parallelepiped whose front face is open, and is an inner casing made of stainless steel mesh or stainless punching metal so that the cooling air can pass therethrough.

  A projecting edge 20 is formed on the outside of the inner casing 13 at the position of the door 15 in order to prevent an electric shock accident in which a worker touches the middle electrode 12 to which a high voltage is applied.

An outer door 14 and an inner door 15 respectively corresponding to the outer housing 11 and the inner housing 12 are provided.
The outer door 14 is made of a metal plate of stainless steel or the like as the outer casing 11, and the inner door 15 is made of a stainless steel mesh or a stainless steel perforated plate like the inner casing 12.
During electric field refrigeration, the outer door 14 and the inner door 15 are closed, at which time the outer door 14 is electrically connected to the outer housing 12 and the inner door 15 is connected to the inner housing 12.

The middle case 12 is housed in the outer case 11 in a nested structure with a space between the inner case 12 and the insulating spacer 16 interposed therebetween, and the middle case 12 and the outer case 11 are electrically separated.
The inner case 13 is housed in the inner case 12 in a nested structure at an interval with an insulating spacer 17 interposed therebetween, and the inner case 13 and the middle case 12 are electrically separated.

From the high voltage power supply 18 between the outer case 11 and the middle case 12, commercial alternating current high voltage, direct current high voltage power source as described in Japanese Patent Application No. 2017-213460, direct current high voltage source as described in Japanese Patent Application No. 2017-213461 Or a high voltage of direct current is supplied.
Specifically, one of the high voltage power supplies 18 is connected to the middle case 12, the other is grounded, and the outer casing 11 is grounded. The inner casing 13 is grounded by being connected to the outer casing by any means.

Shown in FIG. 10 is an electric field treatment refrigerator of Example 8 for explaining the basic configuration of the invention according to the present application.
In this figure, (a) is a front sectional view of the entire configuration of the electric field processing refrigerator of Example 8, (b) is an enlarged sectional view of a portion shown by circle B in (a), (c) is a circle in (a) It is an expanded sectional view of a portion shown by C.

In (a), reference numeral 11 denotes an outer casing made of a stainless steel plate or the like in a rectangular parallelepiped shape whose front is open.
Reference numeral 12 denotes a rectangular parallelepiped whose front face is open, and is a middle case made of stainless steel mesh or stainless punching metal so that the cooling air can be transmitted.
The reference numeral 13 denotes a rectangular parallelepiped whose front face is open, and is an inner casing made of stainless steel mesh or stainless punching metal so that the cooling air can pass therethrough.

  In order to prevent an electric shock accident in which a worker touches the middle electrode 12 to which a high voltage is applied, as shown in (d), the end of the middle case 12 at the position of the inner door 15 is covered with an insulator.

An outer door 14 and an inner door 15 respectively corresponding to the outer housing 11 and the inner housing 12 are provided.
The outer door 14 is made of a metal plate of stainless steel or the like as the outer casing 11, and the inner door 15 is made of a stainless steel mesh or a stainless steel perforated plate like the inner casing 12.
During electric field refrigeration, the outer door 14 and the inner door 15 are closed, at which time the outer door 14 is electrically connected to the outer housing 12 and the inner door 15 is connected to the inner housing 12.

The middle case 12 is housed in the outer case 11 in a nested structure with a space between the inner case 12 and the insulating spacer 16 interposed therebetween, and the middle case 12 and the outer case 11 are electrically separated.
The inner case 13 is housed in the inner case 12 in a nested structure at an interval with an insulating spacer 17 interposed therebetween, and the inner case 13 and the middle case 12 are electrically separated.

From the high voltage power supply 18 between the outer case 11 and the middle case 12, commercial alternating current high voltage, direct current high voltage power source as described in Japanese Patent Application No. 2017-213460, direct current high voltage source as described in Japanese Patent Application No. 2017-213461 Or a high voltage of direct current is supplied.
Specifically, one of the high voltage power supplies 18 is connected to the middle case 12, the other is grounded, and the outer casing 11 is grounded. The inner casing 13 is grounded by being connected to the outer casing by any means.

  A power supply for supplying a voltage for generating an electric field to an electric field treatment furrier will be described.

[Power Supply Example 1]
The power supply apparatus shown in FIG. 11 is a commercial alternating current power supply apparatus conventionally used in an electric field processing refrigerator.
This power supply unit is simply configured with only a transformer.
Commercial AC 100 V is supplied to the primary winding of the transformer of the power supply shown in (a), commercial AC 6800 V is output from the secondary winding, and the outer container and inner container of the electric field processing refrigerator are output from the output terminal. The commercial AC 6800 V shown in (b) is supplied.

[Power Supply Example 2]
The power supply device shown in FIG. 12 (a) boosts the commercial alternating current to, for example, 350 V, rectifies the boosted commercial alternating current to obtain 350 V direct current, and obtains 350 V direct current to obtain high shown in (b) It is a power supply device of Japanese Patent Application No. 2017-213461 which converts an alternating current of 37 kHz 350 V obtained to an alternating current of a frequency, in this case 37 kHz, to the electric field treatment refrigerator main body.

[Power supply device example 3]
The power supply apparatus shown in FIG. 13A is the power supply apparatus of Japanese Patent Application No. 2017-213461 that generates and supplies alternating current of high voltage pulses from a square wave.
This power supply unit differentiates a square wave generated from a square wave generation circuit by a differentiation circuit, and provides a negative pulse indicated by the falling edge of the square wave and a negative pulse obtained by the rising edge, and known negative pulse trains. The voltage is boosted by a flyback transformer booster circuit to obtain a negative DC high voltage pulse shown in (b), which is supplied between the outer electrode and the inner electrode of the electric field processing refrigerator.

[Power supply device example 4]
The power supply device shown in FIG. 14 (a) is the power supply device of Japanese Patent Application No. 2017-213460 which generates and supplies a direct current of a high voltage pulse from sawtooth waves.
This power supply device obtains a pulse voltage of negative polarity from the sawtooth wave which is the output of the sawtooth wave generation circuit by the differentiation circuit, boosts the obtained pulse voltage by the booster circuit, and shows the negative DC high voltage pulse train shown in (b) And supply between the outer electrode and the inner electrode of the electric field processing refrigerator.

[Power supply device example 5]
What is shown in FIG. 15A is the power supply device of Japanese Patent Application No. 2017-213460 which generates and supplies a direct current of a high voltage pulse from a square wave.
This power supply unit differentiates the square wave generated from the square wave generating circuit by the differentiating circuit, obtains a negative pulse indicated by the falling edge of the square wave, and obtains a negative pulse by the rising edge, The negative pulse train is boosted by a known flyback transformer booster circuit to obtain a negative DC high voltage pulse shown in (b) and supplied between the outer electrode and the inner electrode of the electric field processing refrigerator.

[Power supply device example 6]
FIG. 16A shows a power supply device of Japanese Patent Application No. 2017-213460 which generates and supplies a high DC voltage by a multistage voltage doubler half wave rectification circuit.
This power supply device obtains an AC voltage of, for example, 100 V and 30 kHz obtained from the oscillation circuit by a 6-stage cock-croft-Walton circuit, including a 5700 V pulsating current shown in (b). And between the inner electrodes.

[Power supply device example 7]
FIG. 17A shows a power supply device of Japanese Patent Application No. 2017-213460 which generates and supplies a high DC voltage by a multistage voltage double wave rectifier.
This power supply device obtains a direct current including 5700 V of pulsating current shown in (b) by a six-stage cock-croft-Walton circuit, for example, an AC voltage of 100 V and 30 kHz obtained from the oscillation circuit, and the outer electrode of the electric field processing refrigerator And between the inner electrodes.

  The electric field processing refrigerator according to the present invention is useful for the preservation of transport devices and organs for transplantation, in addition to the usual refrigerator used in restaurants and the like.

DESCRIPTION OF SYMBOLS 1, 11 Outer case 2, 12 Inner case 5, 9, 16, 17 Insulating spacer 4, 14 Outer door 5, 15 Inner door 7, 27 Middle case 8, 28 Middle door 18 High voltage power supply

Claims (1)

Cooling air impervious conductive outer housing,
An electric field processing refrigerator having a cooling air permeable conductive inner case which is stored in the conductive outer case and in which a storage item such as food is stored.
A conductive middle housing is disposed between the conductive outer housing and the conductive middle housing,
Grounding the conductive outer housing and the conductive inner housing;
An electric field processing refrigerator characterized by applying a high voltage between the conductive outer case and the conductive middle case.

Images