JP2003194243A - Four-way cock, compression/decompression system using it, and compression/decompression heating system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a four-way cock, a compression/decompression system using it, and a compression/decompression heating system, in which changeover of a communication passage to make compression and decompression can be made by one four-way cock. <P>SOLUTION: The four-way cock 10 is composed of a cylinder 11, core 12, knob 13, and bearing 14, and at the side face of the cylinder, three open holes 23-25 are formed, and the oversurface of the core is provided with one open hole 16 while the side faces are provided with four open holes 17-20, among which the hole 16 is put in communication with the hole 17 through a communication passage 21 while the holes 18-20 are put in communication with one another through communication passages 22. This allows generation of two communication passages in three manners of combination to put in communication two among the four holes provided in the core oversurface and the cylinder side faces. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a four-way cock, a pressurizing / depressurizing system and a pressurizing / depressurizing heating system using the same.

[0002]

2. Description of the Related Art Generally, when heating foodstuffs in a microwave oven or the like, the foodstuffs placed in a container or the like are kept sealed,
When boiling or cooking, it is preferable to pressurize in order to raise the boiling point and improve fire resistance, while it is preferable to depressurize when thawing foods. In order to pressurize and depressurize the fluid such as air in the chamber to be pressurized and depressurized in which foods and the like are put in such a manner, a pump is connected to the chamber to be depressurized and depressurized by operating the pump or pressurizing or Decompression is performed. At this time, a cock is used to connect the pressurizing port or the depressurizing port of the pump to the pressure-reduced / depressurized chamber and to switch the communication path for pressurization and decompression. FIG. 10 is a circuit diagram showing an example of a pressurizing and depressurizing system using such a conventional cock.

This system has two three-way cocks 1,
2. The pump 3 and the pressure-reduced chamber 4 are included. Three-way cock 1,
2 each have three openings, the opening 1a of the three-way cock 1 is connected to the pressurizing port 5 of the pump 3 via a conduit, and the opening 1b of the three-way cock 1 and the opening 2a of the three-way cock 2 are Both are connected to the pressure-reduced chamber 4 via a conduit, and the opening 2b of the three-way cock 2 is connected to the decompression port 6 of the pump 3 via a conduit. On the other hand, nothing is connected to the opening 1c of the three-way cock 1 and the opening 2c of the three-way cock 2, and the opening is an opening. The three-way cock used here can connect any two of the three openings by rotating the core body provided with the communication passage to switch the communication passage. The two openings can also be communicated at the same time.

As shown in FIG. 10 (a), the pressurizing / depressurizing chamber 4 is
When pressurizing the inside, the communication path of the three-way cock 1 is switched so that the opening 1a of the three-way cock 1 communicates with the opening 1b and the opening 1c is closed, and the opening 2b of the three-way cock 2 is opened. Switches the communication passage of the three-way cock 2 so that the communication with the opening 2c and the opening 2a are closed. At this time, the pressure-reduced chamber-pressurization port (pump) and the opening-decompression port (pump) communicate with each other. Thereby, the air sucked from the opening 2c of the three-way cock 2 by operating the pump 3 is conveyed to the pressure reducing port 6 of the pump 3 from the opening 2b through the communication passage in the three-way cock 2 through the conduit. Together with the pressurizing port 5 of the pump 3
Through the conduit 1 through the opening 1a of the three-way cock 1 to the opening 1b through the communication passage in the three-way cock 1 and then to the pressure-reduced chamber 4 to pressurize the chamber (the arrow in the figure at this time). Shows the flow of air).

As shown in FIG. 10 (b), the pressurizing / depressurizing chamber 4 is
When decompressing the inside, the communication passage of the three-way cock 1 is switched so that the opening 1a of the three-way cock 1 communicates with the opening 1c and the opening 1b is closed, and the opening 2a of the three-way cock 2 is opened. Communication with the opening 2b and opening 2c
The communication passage of the three-way cock 2 is switched so that the valve is closed. At this time, the pressure-reduced chamber-decompression port and the opening-pressurization port communicate with each other. With this, similarly to the case of pressurizing, the opening / closing 2 of the three-way cock 2 from the chamber 4 to be pressurized / depressurized.
The air that has been conveyed to the decompression port 6 of the pump 3 via the conduit 2a through the opening 2b passes through the pressurizing port 5 of the pump 3 through the conduit 1a of the three-way cock 1 and the opening 1c. The inside of the pressure-reduced / decompressed chamber 4 is decompressed.

Further, although not shown, when returning the pressure-reduced chamber 4 to normal pressure, the communication passages of the three-way cocks 1 and 2 are switched so that the three openings of the three-way cocks are in communication at the same time. Done by. At this time, the pressurization / decompression chamber-opening port and the pressurization port-decompression port communicate with each other.

In the conventional pressurizing and depressurizing system using such a three-way cock, since two or more three-way cocks are required, the cost is increased when constructing the system and the piping structure is complicated. Further, at least two cocks have to be operated in order to switch the communication passages in order to pressurize or depressurize the chamber to be pressurized / depressurized, which makes the operation complicated and troublesome.

By the way, the conventional cock has two
Some have four openings as described in Japanese Patent Application Laid-Open No. 94977 and Japanese Patent Application Laid-Open No. 1-299373. FIG. 11 is a schematic plan view showing an example of such a conventional four-way cock.

The four-way cock shown in FIG. 11 (a) has four openings .about. On its side surface, and the openings adjacent to each other can be communicated with each other by two communication passages provided in a rotatable core body. Has become. The combination of the communication passages of this four-way cock is −, −, −,
It can be switched by rotating the core body in two ways, -and. Further, in another four-way cock shown in FIG. 11 (b), −, −, −, −, by one substantially Y-shaped communication passage provided in the rotatable core body.
It is possible to switch between five types of communication passages, − and −.

[0010]

However, there is a problem that the pressurizing and depressurizing system as described above cannot be constructed only by switching one conventional four-way cock as described above.

In order to construct the pressurizing and depressurizing system as described above by switching only one four-way cock, two of the four openings provided in the four-way cock are connected to each other. The communicating passages include a pressure-reduced chamber-pressurization port (pump), an opening-a pressure reduction port (pump), a pressure-reduced chamber-a pressure reduction port, an opening-a pressure port, and a pressure-reduction chamber-a pressure release port. In contrast to the three pressurization ports-decompression ports, the conventional four-way cock described above has only two combinations of the one shown in FIG. 11 (a) and the one shown in FIG. 11 (b). Is because there is only one communication passage.

Therefore, the present invention has been made in view of the above problems, and an object thereof is to switch communication passages by operating one cock in the above-described pressurization and depressurization system. An object is to provide a four-way cock that can be used, a pressurizing / depressurizing system and a pressurizing / depressurizing heating system using the same.

[0013]

In order to achieve the above object, a four-way cock according to the present invention is a four-way cock including a tubular body having three openings on its side surface and a core body fitted in the tubular body. The three openings are provided on the same plane perpendicular to the central axis of the cylindrical body, while the core body is rotatable in the cylindrical body, and the upper surface of the core body or The lower surface is provided with one opening hole and the side surface of the core body is provided with at least three opening holes. Each opening hole on the side surface of the core body is perpendicular to the central axis of the core body. While being in the same plane, one of the opening holes on the side surface of the core body communicates with the opening hole on the upper surface or the lower surface of the core body, while the other opening holes on the side surface of the core body communicate with each other. And a core body communicating with an opening hole on the upper surface or the lower surface of the core body. When the opening hole of the side surface is in one position overlapping the opening of the cylindrical body is characterized in that overlap with the other opening hole side of the other opening also each of the core body of the cylinder.

According to this structure, two communication passages are formed to connect two of the four openings, one opening on the upper surface or the lower surface of the core and the three openings on the side surface of the cylindrical body. At the same time, the communication passage can be switched to three ways by rotating the core body.

It should be noted that the number of the opening holes provided on the side surface of the core body is three, and these opening holes are located at positions that divide the circumference of the core body into approximately three equal parts, or The number of the opening holes provided on the side surface is four, and these opening holes are positioned so as to divide the circumference of the core body into approximately four equal parts, or the opening holes on the upper surface of the core body and the side surfaces of the core body are arranged. It is preferable that the communication passage communicating with the opening hole is a groove provided on the side surface of the core body, because the communication passage can be easily processed.

The pressurization / depressurization system according to the present invention comprises the four-way cock, a pump, a pressure-reduced chamber, and a plurality of conduits connecting the four-way cock, the pump and the pressure-reduced chamber, and pressurizing the pump. The port and the decompression port are respectively connected to different openings of the four-way cock via the conduit, and the other openings of the four-way cock are connected to the pressure-reduced chambers via the conduit. .

With such a construction, pressurization and depressurization in the pressurization / decompression chamber can be performed by switching only one cock, so that the system construction cost is reduced and the piping structure is simplified. The operability of switching the communication passage for pressurizing or depressurizing the pressurizing / depressurizing chamber is improved.

The pressurizing / depressurizing heating system according to the present invention comprises the four-way cock, a pump, a pressurizing / depressurizing heating chamber, a plurality of conduits connecting the four-way cock, the pump and the pressurizing / depressurizing heating chamber, and heating means. The pressurizing port and the depressurizing port of the pump are respectively connected to different openings of the four-way cock through the conduit, and the other openings of the four-way cock are connected to the heating / depressurizing / heating chamber through the conduit. On the other hand, the heating means is characterized in that the chamber for heating under reduced pressure is heated, further, input means,
A control unit, a pressure sensor, and a drive unit attached to the four-way cock are provided, and while the pressure sensor detects the pressure in the heating / depressurizing / heating chamber, the detected data and the data input from the input unit are detected. Based on this, the control means may control the pump as well as the drive unit.

According to such a structure, pressurization and depressurization in the heating / depressurizing / heating chamber can be performed only by switching one cock, so that the system construction cost can be reduced and the piping structure can be simplified. The operability of switching the communication passages for pressurizing or depressurizing the chamber to be pressurized / depressurized is improved, and the pressure inside the chamber to be heated / depressurized can be automatically adjusted while heating the chamber.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is an external perspective view of a first embodiment of a four-way cock according to the present invention, FIG. 2 is an exploded perspective view of the four-way cock of FIG. 1, and FIG. 3 is an operation explanatory view of the four-way cock of FIG.

As shown in FIGS. 1 and 2, in this embodiment,
The four-way cock 10 includes a cylindrical body 11 and a cylindrical core body 1.
2, a circular plate-shaped knob 13 and a bolt-shaped bearing 14. The side surface of the cylindrical body 11 has three openings 23 to 25, and these openings are provided on the same plane perpendicular to the central axis of the cylindrical body 11. On the other hand, one opening hole 16 is provided on the upper surface of the core body 12, four opening holes 17 to 20 are provided on the side surface of the core body 12, and these opening holes 17 to 20 are cores. It lies in the same plane perpendicular to the central axis of the body 12.

The opening hole 17 is connected to the opening hole 16 and the communication passage 2
1, the opening holes 18 to 20 communicate with each other through a communication passage 22. The four opening holes on the side surface of the core body 12 are located at positions that divide the circumference of the core body 12 into four equal parts, and the opening holes 16 on the upper surface of the core body 12 are provided at the peripheral end portion of the core body 12. Opening hole 1
The communication passage 21 that communicates 6 with the opening hole 17 has a groove shape provided on the side surface of the core body 12.

Further, the projection 15 protruding laterally from the side surface
The knob 13 having the is formed integrally with the upper surface of the core body 12, and the core body 12 is fitted into the cylinder body 11 from above the cylinder body 11 while aligning the central axes of the core body 12 with the center line L. .
A bearing 14 is screwed onto the lower surface of the core body 12 along the center line L, and the bearing body 14 comes into contact with the lower surface of the cylinder body 11 to prevent the core body 12 from slipping out above the cylinder body 11. In addition to blocking, the core body 12 is rotatable in the cylindrical body 11 around the central axis as shown by the arrow in FIG. Since the inner surface of the tubular body 11 and the side surface of the core body 12 both have smaller diameters toward the lower portions, the core body 12 does not slip out below the tubular body 11.

It should be noted that the upper end portion of the core body 12 protrudes from the upper surface of the cylinder body 11 when the core body 12 is fitted in the cylinder body 11, whereby the upper peripheral edge of the core body 12 is surrounded. The opening hole 16 of the portion is an opening. Further, the core body 12 communicating with the opening hole 16 at the peripheral edge of the upper surface of the core body 12
When the opening hole 17 on the side surface of the cylindrical body 11 is located at a position overlapping with one of the openings of the cylindrical body 11, the other openings of the cylindrical body 11 are respectively arranged in the core body 12.
Of the cylindrical body 11 so as to overlap with other opening holes on the side surface of
The three openings 23 to 25 are at positions that divide the circumference of the tubular body 11 into four equal parts. The conduits attached to the respective openings of the tubular body 11 of the four-way cock 10 are omitted in FIG.

By doing so, the opening 16 at the peripheral edge of the upper surface of the core 12 and the three openings 23 to 25 at the side surface of the tubular body 11 are formed.
2 of the four openings 4 and 4 are formed, two communication passages are formed to connect the two openings, and as shown in FIG.
By rotating the core body 12 fitted in 1 through the knob 13 by an appropriate amount, this communication path can be switched among three ways.

In the state shown in FIG. 3A, the opening 23 and the opening hole 17, the opening 24 and the opening hole 18, and the opening 25 and the opening hole 1 are formed.
By overlapping 9 respectively, the opening 16 communicates with the opening 23 and the communication passage 21, and the opening 24 communicates with the opening 25 and the T-shaped communication passage 22, respectively. From this state, when the core body 12 is rotated clockwise by about 90 °,
The state shown in FIG. In this state, the opening 23 and the opening hole 20, the opening 24 and the opening hole 17, and the opening 25 and the opening hole 1
8 are in the overlapping position, and the opening 16 is the opening 24.
And the communication passage 21, the opening 23 and the communication passage 2
2 communicate with each other. Further, when the core body 12 is rotated clockwise by about 90 °, the state shown in FIG. 3C is obtained, and the opening 23 and the opening hole 19 and the opening 24 and the opening hole 2 are formed.
0, the opening 25 and the opening hole 17 overlap with each other, and the opening 16 communicates with the opening 25 and the communication passage 21, and the opening 23 communicates with the opening 24 and the communication passage 22, respectively. Thus, the opening 16-opening 23, the opening 24-opening 25, the opening 16-opening 24, the opening 23-opening 25, and the opening 1
The communication passage is switched in three ways: 6-opening 25 and opening 23-opening 24.

Since the communication passage 21 provided in the core body 12 is a groove carved on the side surface of the core body 12, the communication passage 21 can be easily manufactured and the four-way cock 10 becomes inexpensive.

FIG. 4 shows a second embodiment of the four-way cock according to the present invention. 4 (a) is an external perspective view thereof, FIG.
(B) is a plan view.

The four-way cock 30 has three opening holes on the side surface of the core body 32, and these opening holes 37 are provided.
To 39 are provided at positions that divide the circumference of the core body 32 into approximately three equal parts, and the position of the opening hole 36 provided on the upper surface of the core body 32 is not at the peripheral end portion of the core body 32 but at the center portion. This is different from the four-way cock 10 described above in that the knob 33 is attached to the central portion of the upper surface of the core body 32 via the protrusion 35 that projects downward from. In addition, the knob 3 via the protrusion 35
By attaching 3 to the core body 32, the knob 33 is attached to the core body 3.
It is prevented that the opening hole 36 on the upper surface of 2 is blocked, and the opening hole 36 is an opening.

Even in this way, the above-described four-way cock 1
Similarly to 0, by rotating the core body 32 provided with the two communication passages 41 and 42 as shown by the arrow in FIG. 4A, the opening 36 on the upper surface of the core body 32 and the tubular body 31 are rotated. Side of 3
Of the four openings of the three openings 43 to 45, two communication passages that connect the two openings are defined as the opening 36-opening 44, the opening 43-opening 45, the opening 36-opening 45, and the opening 43.
It is possible to switch between the opening 44, the opening 36, the opening 43, and the opening 44 and the opening 45. The amount of rotation at this time is about 120 °.

Next, FIG. 5 is a schematic view showing the configuration of an embodiment of the pressurizing / depressurizing system according to the present invention, and FIG. 6 is an operation explanatory view of a four-way cock used in the pressurizing / depressurizing system of FIG.

As shown in FIGS. 5 and 6, in the present embodiment,
The pressure increasing / decreasing system 50 includes a four-way cock 10, a pump 52,
The pump 52 comprises a pressure-reduced chamber 53 and conduits 54 to 56.
One end of a conduit 54 is attached to the pressurizing port 57 of the pump 54, and the other end of the conduit 54 is connected to the opening 25 of the four-way cock 10. The depressurizing port 58 of the pump 52 has a conduit 55.
Is attached to one end of the conduit 55, and the other end of the conduit 55 is attached to the four-way cock 1.
0 opening 23. And four-way cock 1
One end of a conduit 56 is attached to the opening 24 of 0, and the other end of the conduit 56 is connected to a conduit attachment portion 59 of the pressure-reduced / depressurized chamber 53.

In case of pressurizing the inside of the pressurizing / depressurizing chamber 53, as shown in FIG.
As shown in (a), the opening 23 of the four-way cock 10 is overlapped with the opening hole 17, the opening 24 is overlapped with the opening hole 18, and the opening 25 is overlapped with the opening hole 19, respectively. The knob 13 is adjusted so that two communication passages of the opening 16-opening 23 and the opening 24-opening 25 are formed. As a result, the pressure-reduced chamber 53-pressurizing port 57 and the opening port 16-depressurizing port 58 are communicated with each other via the respective conduits. Therefore, by operating the pump 52, from the opening port 16 of the four-way cock 10. The sucked air is conveyed to the decompression port 58 of the pump 52 through the conduit 55, passes through the conduit 54 from the pressurization port 57, the four-way cock 10, and further to the conduit 5
It is conveyed to the pressure-reduced chamber 53 through 6 to pressurize the pressure-reduced chamber 53.

FIG. 6 (b) shows a case where the inside of the pressurized chamber 53 is returned to normal pressure. Since the opening 23 is located at a position where the opening 24, the opening 24 is located at a position where the opening 24 and the opening 25 are located at a position where the opening 25 overlaps with the opening hole 18, respectively, as in FIG. 3B, the opening 16-the opening 24, the opening 23- Two communication passages of the opening 25 are formed, and the pressurization / decompression chamber 53-opening port 16 and the pressurization port 57-decompression port 58 communicate with each other. by this,
Since the air in the pressure-reduced chamber 53 can freely flow in and out through the opening 16, the pressure-reduced chamber 53 is returned to the normal pressure.

Even when the inside of the pressure-reduced chamber 53 is decompressed, FIG.
As shown in (c), the opening 23 has the opening hole 19 and the opening 2
4 overlaps the opening hole 20 and the opening 25 overlaps the opening hole 17, respectively, so that the opening 16 and the opening 2 are formed in the same manner as in FIG.
5, two communication passages of the opening 23 and the opening 24 are formed, and the pressure-reduced chamber 53-the decompression port 58 and the opening 16-the pressurization port 57 communicate with each other. As a result, the inside of the pressure-reduced / decompressed chamber 53 is decompressed in the same manner as the case of pressurizing.

With this arrangement, the pressure in the pressure-reduced chamber 53 can be increased or decreased only by switching one four-way cock 10.

Next, FIG. 7 is a schematic view showing the structure of an embodiment of the pressurizing / depressurizing heating system according to the present invention, and FIG. 8 is a detailed view of the peripheral portion of the four-way cock used therein.
8A is a plan view, FIG. 8B is a side view, and FIG. 9 is a circuit diagram of a four-way cock electric circuit section.

As shown in FIGS. 7 and 8, in the present embodiment,
In addition to the four-way cock 10, the pump 52, the heating / depressurizing / heating chamber 67, the conduits 54, 55, and 69, the input unit 61, the control unit 62,
It is composed of a pressure sensor 63, a four-way cock electric circuit section 64, a drive section motor 65, a pump electric circuit section 66, and a heating means 68. One end of a conduit 54 is attached to the pressurizing port 57 of the pump 52, the other end of the conduit 54 is connected to the opening 25 of the four-way cock 10, and the depressurizing port 5 of the pump 52 is connected.
One end of a conduit 55 is attached to 8, and the other end of the conduit 55 is connected to the opening 23 of the four-way cock 10. Also,
The opening 24 of the four-way cock 10, the conduit attachment portion 71 of the pressurization / decompression heating chamber 67, and the conduit attachment portion 70 of the pressure sensor 63.
Each end of a T-shaped conduit 69 is attached to and. The drive shaft 90 of the drive unit motor 65 located right above the four-way cock 10 is the knob 1 of the four-way cock 10.
3 is fitted in a receiving hole provided in the central portion of the upper surface of 3, and the drive unit motor 65 main body is attached and fixed to the cabinet 90 by an attaching portion 88 provided in the main body.

Three switches are arranged in the same plane around the knob 13 of the four-way cock 10.
A switch located on the opening 24 side of the four-way cock 10 is a pressure reducing side switch 83, a switch located on the opening 23 side is a normal pressure side switch 82, and a switch located on the side facing the switch 83 is a pressurizing side switch 81. Then, as the knob 13 rotates, the protrusion 1 of the knob 13
5 is in contact with each of the buttons 84 to 86 protruding to the side of the switch so that each switch is switched. Further, the heating means 68 which is attached to the heating / depressurizing / heating chamber 67 and heats an object to be heated such as foodstuffs in this chamber uses a heater or a microwave. In addition,
The wiring 87 of each switch and the connection terminal 8 of the drive unit motor 65
The wiring connected to 9 is omitted.

The processing procedure of this pressurizing / depressurizing heating system will be described below. First, (1) A desired pressure Ps is input through the input unit 61. However, assuming that the atmospheric pressure is Pa, Ps ≠ P
a. Next, (2) the control unit 62 controls the pressure sensor 63.
The pressure inside the heating / depressurizing / heating chamber 67 detected by the sensor is read, and the detected value P of the read pressure and the input pressure Ps are read.
Based on the above, as shown below, the four-way cock electric circuit unit 64 attached to the drive unit motor 65 and the pump electric circuit unit 66 attached to the pump 52 are controlled (the arrow in FIG. 7 indicates the data at this time). Shows the flow of).

When P> Ps, the heating / depressurizing / heating chamber 67 is depressurized. In this case, the control unit 62 controls the relay switch 93 of the four-way cock electric circuit unit 64 to drive the drive unit motor 65.
The knob 13 of the four-way cock 10 rotates by rotationally driving the drive shaft 90 (see FIG. 9). When the protrusion 15 of the knob 13 comes into contact with the button 86 of the pressure reducing side switch 83 and pushes the button 86 as the knob 13 rotates, the rotation of the drive unit motor 65 is stopped. At this time, the heating / depressurization / heating chamber-decompression port and the opening-pressurization port communicate with each other via the four-way cock 10.
As a result, the control unit 62 operates the pump 52,
As in FIG. 6C, the inside of the heating / depressurizing / heating chamber 67 is depressurized.

When P <Ps, the heating / depressurizing / heating chamber 67 is pressurized. In this case, the control unit 62 controls the relay switch 91.
Is controlled to drive the drive unit motor 65 to rotate, and the protrusion 15 of the knob 13 comes into contact with the button 84 of the pressurizing side switch 81 and pushes it to stop the rotation. At this time, the heating / depressurized heating chamber-pressurizing port and the opening-reducing port communicate with each other. Now, the controller 62 controls the pump 52
6 to operate the heating / depressurizing / decompressing heating chamber 6 in the same manner as in FIG.
The inside of 7 is pressurized.

Then, (3) the detection value P of the pressure sensor 63
When P becomes P = Ps, the control unit 62 stops the pump 52. After (4), the processing procedure from (2) to (3) is repeated. (5) When Ps = Pa is input from the input unit 61 or when an instruction to end the pressurization / depressurization is input, the pressurization / depressurization of the pressurization / depressurization heating chamber 67 is ended and the normal pressure is restored. In this case, the control unit 62 reads Ps = Pa, performs the process (2), and then stops the pump 52 when P = Ps (= Pa). Then, the relay switch 92 is controlled to drive the drive unit motor 65 to rotate, and
When the protrusion 15 of the knob 13 comes into contact with the button 85 of the normal pressure side switch 82 and pushes it, the rotation is stopped. At this time, the heating / decompression heating chamber-opening port and the pressurizing port-depressurizing port communicate with each other. As a result, as in FIG. 6B, the inside of the heating / depressurizing / heating chamber 67 is returned to the normal pressure.

In this system, when pressurizing or depressurizing the heating / depressurizing / heating chamber, the heating unit may be heating the chamber or stopping the heating. In particular, when the heating / depressurization / decompression heating chamber containing foods is being heated, the pressure inside the heating / decompression / heating chamber is remarkably changed by the steam generated from the food / material to be heated. Therefore, in order to maintain a desired pressure, switching of the cock and stopping of the operation of the pump are frequently repeated, but in the present embodiment, since these pressure adjustments are automatically performed, compared with the case of performing manually. Are better.

[0045]

As described above, in the four-way cock of the present invention, the two communication passages can be switched to three ways by rotating the core body. The pressurizing / depressurizing system of the present invention can pressurize or depressurize the pressurizing / depressurizing chamber by switching one cock by using this four-way cock, and therefore the switching operation is easy and the system is The cost of construction can be reduced. In addition, the system can be made compact because the piping structure is simple. Further, in the pressurizing / depressurizing heating system of the present invention, pressurizing / depressurizing of the pressurizing / depressurizing heating chamber can be performed by switching one cock, so that the system construction cost can be reduced and the piping structure can be simplified. In addition to being able to make the system compact, pressure regulation while heating can be automated.

[Brief description of drawings]

FIG. 1 is an external perspective view of a first embodiment of a four-way cock according to the present invention.

FIG. 2 is an exploded perspective view of the four-way cock of FIG.

FIG. 3 is an operation explanatory view of the four-way cock of FIG. 1.

FIG. 4 is a second embodiment of a four-way cock according to the present invention, (a) is an external perspective view thereof, and (b) is a plan view.

FIG. 5 is a schematic diagram showing the configuration of an embodiment of a pressurizing / depressurizing system according to the present invention.

6 is an operation explanatory view of a four-way cock used in the pressurizing / depressurizing system of FIG.

FIG. 7 is a schematic diagram showing the configuration of an embodiment of a pressurizing / depressurizing heating system according to the present invention.

8A and 8B are detailed views of a peripheral portion of a four-way cock used in the heating / depressurizing / heating system of FIG. 7, in which FIG. 8A is a plan view and FIG. 8B is a side view.

9 is a circuit diagram of a four-way cock electric circuit unit used in the pressurizing / depressurizing / heating system of FIG. 7.

FIG. 10 is a circuit diagram showing an example of a pressurizing and depressurizing system using a conventional cock.

FIG. 11 is a schematic plan view showing an example of a conventional four-way cock.

[Explanation of symbols]

10, 30 four-way cock 11,31 cylinder 12, 32 core 16-20, 36-39 Open hole 21, 22, 41, 42 communication passage 23-25, 43-45 openings 50 pressurization system 52 pumps 53 Pressure reduction chamber 54-56, 69 conduits 57 Pressurization port 58 Decompression port 61 Input section 62 control unit 63 Pressure sensor 65 motor 67 Decompression / decompression heating chamber 68 Heating means

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F24C 7/02 511 F24C 7/02 511A F term (reference) 3H067 AA12 AA23 CC32 CC44 CC46 DD03 DD12 EA05 EA06 FF17 GG03 GG21 3L086 AA01 BA10 BC20 DA24 DA30 4B055 AA01 BA36 CA69 CA71 CC28 CC58 CD08 CD63

Claims (7)

[Claims] 1. A four-way cock comprising a tubular body having three openings on its side surface and a core body fitted in the tubular body, wherein the three openings are on the same plane perpendicular to the central axis of the tubular body. On the other hand, the core body is rotatable in the cylindrical body, and one opening hole is provided on the upper surface or the lower surface of the core body and the side surface of the core body. Is provided with at least three opening holes, each opening hole on the side surface of the core body is on the same plane perpendicular to the central axis of the core body, and one of the opening holes on the side surface of the core body is provided. Are in communication with the opening holes in the upper surface or the lower surface of the core body, while the other opening holes in the side surfaces of the core body are in communication with each other, and are in communication with the opening holes in the upper surface or the lower surface of the core body. When the opening hole on the side surface of the core body is in a position overlapping with one of the openings of the cylindrical body, A four-way cock, wherein the other openings of the cylindrical body are also overlapped with the other openings of the side surface of the core body. 2. The number of opening holes provided on the side surface of the core body is three, and these opening holes are located at positions that divide the circumference of the core body into three substantially equal parts. The four-way cock described in 1. 3. The core is provided with four opening holes on its side surface, and these opening holes are located at positions that divide the circumference of the core into four equal parts. The four-way cock described in 1. 4. The communication passage communicating with the opening hole on the upper surface of the core body and the opening hole on the side surface of the core body is a groove provided on the side surface of the core body. The four-way cock according to any one of items. 5. The four-way cock, the pump, the pressure-reduced and decompressed chamber,
Consisting of a plurality of conduits connecting the four-way cock, the pump and the pressure-reduced chamber, the pressurizing port and the decompressing port of the pump are respectively connected to different openings of the four-way cock through the conduit, The pressurizing / depressurizing system, wherein the other opening of the four-way cock is connected to the pressurizing / depressurizing chamber via the conduit. 6. A pressurizing port and a depressurizing port of the pump, comprising the four-way cock, a pump, a heating / depressurizing / heating chamber, a plurality of conduits connecting the four-way cock, the pump and the depressurizing / heating chamber, and heating means. The mouths are respectively connected to different openings of the four-way cock via the conduit, and the other openings of the four-way cock are connected to the heating / depressurizing heating chamber via the conduit, while the heating means A heating / depressurizing / heating system characterized by heating the heating / depressurizing / heating chamber. 7. An input means, a control means, a pressure sensor,
It is equipped with a drive unit attached to the four-way cock,
While the pressure sensor detects the pressure in the heating / depressurizing / heating chamber, the control unit controls the drive unit and the pump based on the detected data and the data input from the input unit. The pressurizing / depressurizing / heating system according to claim 6, characterized in that.