# US 10,478,790 B2 · Stirrer producing intermittent jet flow

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- Number: US 10,478,790 B2
- Document ID: US10478790B2
- Status: Granted
- Kind: B2
- Application number: 15/557,016
- Filed: 2016-03-23
- Published: 2018-03-01
- Granted: 2019-11-19
- Earliest claimed: 2015-03-24
- Assignees: M. Technique Co., Ltd.
- Applicants: M. Technique Co., Ltd.
- Inventors: Masakazu Enomura
- Web page: https://patentgrep.com/patent/US10478790B2

## CPC

- B01F 27/81: the stirrers having central axial inflow and substantially radial outflow
- B01F 23/40: Mixing liquids with liquids; Emulsifying
- B01F 23/41: Emulsifying
- B01F 25/4412: {the slits being formed between opposed planar surfaces, e.g. pushed again each other by springs}
- B01F 27/1145: ribbon shaped with an open space between the helical ribbon flight and the rotating axis
- B01F 27/192: with dissimilar elements
- B01F 27/41: with the mutually rotating surfaces facing each other
- B01F 27/80: with stirrers rotating about a substantially vertical axis
- B01F 27/8111: {the stirrers co-operating with stationary guiding elements, e.g. surrounding stators or intermeshing stators (B01F27/812 takes precedence)}
- B01F 27/812: {the stirrers co-operating with surrounding stators, or with intermeshing stators, e.g. comprising slits, orifices or screens}
- B01F 27/84: with two or more stirrers rotating at different speeds or in opposite directions about the same axis
- B01F 27/90: with paddles or arms
- B01F 27/922: with two or more helices, e.g. with intermeshing helices
- B01F 2215/0409: Relationships between different variables defining features or parameters of the apparatus or process
- B01F 2215/0431: Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)

## Abstract

The problem of providing a stirrer capable of more effectively shearing a fluid to be treated is addressed, by using the action of an intermittent jet stream. A stirrer is provided with a rotor having a blade and a screen, which are relatively rotated such that the fluid to be treated is discharged from the inside of the screen to the outside as an intermittent jet stream through a slit in the screen, the stirrer satisfying condition 1 and condition 2. (Condition 1) the relationship among the width b in the rotating direction of a tip part of the blade, the width s in the circumferential direction of the slit, and the width t in the circumferential direction of the screen member is b≥2s+t. (Condition 2) the relationship between the width b in the rotating direction of the tip part of the blade and the maximum inner diameter c of the screen is b≥0.1c.

## Claims

### Claim 1

A stirrer comprising:
a supporting tube;
a hollow housing supported by the supporting tube, the hollow housing including a sucking chamber and a sucking port, wherein the hollow housing is configured to suck a fluid to be processed into the sucking chamber via the sucking port then to introduce it to a stirring chamber via a comparting wall;
a rotating rotor provided with a plurality of blades and accommodated in the stirring chamber; and
a screen arranged around the rotor, wherein the screen is tapered towards a central axis of the supporting tube and is arranged around the rotor;
wherein:
the rotor and the screen are provided within the hollow housing,
each blade includes an edge portion at an outermost circumferential surface thereof,
the screen comprises a plurality of slits in a circumferential direction thereof and a screen member located between the slits that are located in a neighborhood to each other,
a clearance from the edge portion of each blade to the screen is a constant value,
the edge portion of each blade and each slit have a matching region where they are in the same position and overlapped with each other in a longitudinal direction of the respective slit,
of the rotor and the screen, at least the rotor is rotated so as to relatively rotate the rotor and the screen thereby ejecting a fluid to be processed in the stirring chamber from inside the screen to outside thereof through the slits as an intermittent jet flow, and
the stirrer satisfies following condition 1 and condition 2:
(Condition 1)
in the matching region, a relationship among a width (b) of the edge portion of each blade in a rotational direction, a width (s) of the respective slit in a circumferential direction, and a width (t) of the screen member in a circumferential direction is shown by b≥2s+t, and
(Condition 2)
in the matching region, a relationship between the width (b) of the edge portion of each blade in a rotational direction and a maximum inner diameter (c) of the screen is shown by b≥0.1c.

### Claim 2 (depends on 1)

The stirrer according to claim 1, wherein the width of the slits in a circumferential direction is in a range of 0.2 to 4.0 mm.

### Claim 3 (depends on 1)

The stirrer according to claim 1, wherein diameters of each blade and the screen become shorter as each blade and the screen are more apart in an axial direction from an introduction port to introduce the fluid to be processed from the sucking chamber into the screen.

### Claim 4 (depends on 1)

The stirrer according to claim 1, wherein:
the plurality of the slits have an identical width in the circumferential direction and are formed with an identical interval in the circumferential direction, and
the screen does not rotate.

### Claim 5 (depends on 1)

The stirrer according to claim 1, wherein a total sum of a cross section area of the plurality of blades in a plane perpendicular to a rotation axis of the rotor is smaller than a cross section area of a space inside the screen.

### Claim 6 (depends on 1)

The stirrer according to claim 1, wherein the comparting wall is provided between the sucking port and the plurality of blades, and
wherein the comparting wall extends towards the rotor.

### Claim 7 (depends on 1)

The stirrer according to claim 1, wherein the sucking port is tapered away from the central axis of the supporting tube.

### Claim 8 (depends on 1)

The stirrer according to claim 1, wherein the clearance is between an inner wall of the screen and the edge portion of each blade and is in the range of 0.2 to 4.0 mm, and
wherein a fluid to be processed is ejected, as the intermittent jet flow, from inside the screen to outside thereof through the slits located in a front side of the rotational direction of each blade and the fluid to be processed is sucked through the slits located in a back side of the rotational direction of each blade, the stirrer being configured to generate a period between ejection from the slits located in the front side of the rotational direction of each blade and suction from the slits located in the back side of the rotational direction of each blade, where the fluid to be processed becomes static by setting the clearance.

### Claim 9

A stirrer comprising:
a supporting tube;
a hollow housing supported by the supporting tube, the hollow housing including a sucking chamber and a sucking port, wherein the hollow housing is configured to suck a fluid to be processed into the sucking chamber via the sucking port then to introduce it to a stirring chamber via a comparting wall;
a rotating rotor provided with a plurality of blades and accommodated in the stirring chamber; and
a screen arranged around the rotor, wherein the screen is tapered towards a central axis of the supporting tube and is arranged around the rotor;
wherein:
the rotor and the screen are provided within the hollow housing,
each blade includes an edge portion at an outermost circumferential surface thereof,
the screen comprises a plurality of slits in a circumferential direction thereof and a screen member located between the slits that are located in a neighborhood to each other,
the edge portion of each blade and each slit have a matching region where they are in the same position and overlapped with each other in a longitudinal direction of the respective slit,
the rotor is rotated and the screen is rotated in an opposite direction to the rotor thereby ejecting a fluid to be processed in the stirring chamber from inside the screen to outside thereof through the slits as an intermittent jet flow, and
the stirrer satisfies following condition 1 and condition 2:
(Condition 1)
in the matching region, a relationship among a width (b) of the edge portion of each blade in a rotational direction, a width (s) of the respective slit in a circumferential direction, and a width (t) of the screen member in a circumferential direction is shown by b≥2s+t, and
(Condition 2)
in the matching region, a relationship between the width (b) of the edge portion of each blade in a rotational direction and a maximum inner diameter (c) of the screen is shown by b≥0.1c.

### Claim 10 (depends on 9)

The stirrer according to claim 9, wherein the width of the slits in a circumferential direction is in a range of 0.2 to 4.0 mm.

### Claim 11 (depends on 9)

The stirrer according to claim 9, wherein diameters of each blade and the screen become shorter as each blade and the screen are more apart in an axial direction from an introduction port to introduce the fluid to be processed from the sucking chamber into the screen.

### Claim 12 (depends on 9)

The stirrer according to claim 9, wherein:
the supporting tube includes a stirring blade located on an outer circumferential surface thereof,
the plurality of the slits have an identical width in the circumferential direction and are formed with an identical interval in the circumferential direction.

### Claim 13 (depends on 9)

The stirrer according to claim 9, wherein a total sum of a cross section area of the plurality of blades in a plane perpendicular to a rotation axis of the rotor is smaller than a cross section area of a space inside the screen.

### Claim 14 (depends on 9)

The stirrer according to claim 9, wherein the comparting wall is provided between the sucking port and the plurality of blades, and
wherein the comparting wall extends towards the rotor.

### Claim 15 (depends on 9)

The stirrer according to claim 9, wherein the sucking port is tapered away from the central axis of the supporting tube.

### Claim 16 (depends on 9)

The stirrer according to claim 9, wherein a clearance between an inner wall of the screen and the edge portion of each blade is in the range of 0.2 to 4.0 mm, and
wherein a fluid to be processed is ejected, as the intermittent jet flow, from inside the screen to outside thereof through the slits located in a front side of the rotational direction of each blade and the fluid to be processed is sucked through the slits located in a back side of the rotational direction of each blade, the stirrer being configured to generate a period between ejection from the slits located in the front side of the rotational direction of each blade and suction from the slits located in the back side of the rotational direction of each blade, where the fluid to be processed becomes static by setting the clearance.