VAPORIZATION TYPE HUMIDIFICATION UNIT, CONTROL METHOD OF VAPORIZATION TYPE HUMIDIFICATION UNIT, AND SHEET MANUFACTURING APPARATUS

• US 20190309475A1
• Filed: 11/06/2017
• Published: 10/10/2019
• Est. Priority Date: 11/17/2016
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: INAGAKI, Yuta, SAITA, Hiroyasu, TSUJINO, Kiyoshi, SAITO, Yutaka, NAKAMURA, Masahide
• Granted Patent: US 11,214,924 B2
• Time in Patent Office: Days
• CPC Class Codes: D04H 1/732 by fluid current, e.g. air-lay
• CPC Class Codes: D21F 9/00 Complete machines for making continuous webs of paper
• CPC Class Codes: D21G 7/00 Damping devices
• CPC Class Codes: D21G 9/0009 Paper-making control systems
• CPC Class Codes: F24F 3/14 by humidification; by dehumidification
• CPC Class Codes: F24F 6/00 Air-humidification , e.g. cooling by humidification
• CPC Class Codes: F24F 6/04 using stationary unheated wet elements
• CPC Class Codes: F24F 6/12 by forming water dispersions in the air

Abstract

The vaporization type humidification unit includes a vaporization unit that evaporates moisture, a first blower that sucks humidification air humidified by the vaporization unit, a transport tube that is connected to the first blower and through which the air discharged from the first blower is transported, a second blower connected to the transport tube and discharging the humidification air discharged from the first blower side toward outside, an opening provided in a middle of the transport tube, a humidity measurement unit installed on a discharging side of the second blower, and a control unit that controls an air flow rate discharged from the first blower and the second blower, in which the control unit controls the air flow rate discharged from the second blower to a desired value and controls the air flow rate discharged from the first blower based on a humidity measured by the humidity measurement unit.

Claims

1. A vaporization type humidification unit comprising:

a vaporization unit that evaporates moisture;

a first blower that sucks a humidification air humidified by the vaporization unit;

a transport tube that is connected to the first blower and through which the air discharged from the first blower is transported;

a second blower connected to the transport tube and discharging the humidification air discharged from the first blower side toward outside;

an opening provided in a middle of the transport tube;

a humidity measurement unit installed on a discharging side of the second blower; and

a control unit that controls an air flow rate discharged from the first blower and the second blower, wherein

the control unit controls the air flow rate discharged from the second blower to a desired value and controls the air flow rate discharged from the first blower based on a humidity measured by the humidity measurement unit.

3. The vaporization type humidification unit according to claim 1, wherein

the vaporization unit includes a humidification filter.

4. The vaporization type humidification unit according to claim 1, wherein

the control unit reduces the air flow rate of the first blower when the measured humidity by the humidity measurement unit is high relative to a predetermined humidity, and

the second blower raises an intake flow rate of outside air from the opening.

5. The vaporization type humidification unit according to claim 1, wherein

the control unit raises the air flow rate of the first blower when the measured humidity by the humidity measurement unit is low relative to a predetermined humidity, and

the second blower reduces an intake flow rate of outside air from the opening.

9. A sheet manufacturing apparatus comprising:

the vaporization type humidification unit according to claim 1.

10. The sheet manufacturing apparatus according to claim 9, wherein

a part through which raw material or material of a sheet passes is humidified by the vaporization type humidification unit.

2. A vaporization type humidification unit comprising:

a vaporization unit that evaporates moisture;

a first blower that discharges air toward the vaporization unit;

a transport tube that is connected to the vaporization unit and through which air that has passed the vaporization unit is transported;

a second blower connected to the transport tube and discharging the air discharged from the vaporization unit side toward outside;

an opening provided in a middle of the transport tube;

a humidity measurement unit installed on a discharging side of the second blower; and

a control unit that controls an air flow rate discharged from the first blower and the second blower, wherein

the control unit controls the air flow rate discharged from the second blower to a desired value and, controls the air flow rate discharged from the first blower based on a humidity measured by the humidity measurement unit.

11. The vaporization type humidification unit according to claim 2, wherein

the vaporization unit includes a humidification filter.

12. The vaporization type humidification unit according to claim 2, wherein

the control unit reduces the air flow rate of the first blower when the measured humidity by the humidity measurement unit is high relative to a predetermined humidity, and

the second blower raises an intake flow rate of outside air from the opening.

13. The vaporization type humidification unit according to claim 2, wherein

the control unit raises the air flow rate of the first blower when the measured humidity by the humidity measurement unit is low relative to a predetermined humidity, and

the second blower reduces an intake flow rate of outside air from the opening.

14. A sheet manufacturing apparatus comprising:

the vaporization type humidification unit according to claim 2.

17. A sheet manufacturing apparatus comprising:

the vaporization type humidification unit according to claim 2.

6. A control method of a vaporization type humidification unit that includes

a vaporization unit that evaporates moisture,

a first blower that sucks humidification air humidified by the vaporization unit,

a transport tube that is connected to the first blower and through which the air discharged from the first blower is transported,

a second blower connected to the transport tube and discharging the humidification air discharged from the first blower side toward outside,

an opening provided in a middle of the transport tube, and

a humidity measurement unit installed on a discharging side of the second blower,

the method comprising:

controlling an air flow rate discharged from the second blower to a desired value; and

controlling the air flow rate discharged from the first blower based on a humidity measured by the humidity measurement unit.

15. A sheet manufacturing apparatus comprising:

the vaporization type humidification unit according to claim 6.

18. A sheet manufacturing apparatus comprising:

the vaporization type humidification unit according to claim 6.

7. A vaporization type humidification unit comprising:

a vaporization unit that evaporates moisture;

a first blower disposed on an upstream or a downstream of the vaporization unit in an air flow direction and feeding humidification air humidified by the vaporization unit;

a second blower disposed on a downstream of the first blower and discharging a mixture air of the humidification air fed by the first blower and outside air;

a humidity measurement unit installed on a discharging side of the second blower; and

a control unit that controls a humidification amount by varying an air flow rate fed by the first blower without varying an air flow rate discharged from the second blower based on a measurement result of the humidity measurement unit.

16. A sheet manufacturing apparatus comprising:

the vaporization type humidification unit according to claim 7.

19. A sheet manufacturing apparatus comprising:

the vaporization type humidification unit according to claim 7.

8. A control method of a vaporization type humidification unit that includes a vaporization unit that evaporates moisture, a first blower disposed on an upstream or a downstream of the vaporization unit and feeding humidification air humidified by the vaporization unit in an air flow direction, and a second blower disposed on a downstream of the first blower and discharging a mixture of the humidification air fed by the first blower and outside air, the method comprising:

controlling a humidification amount by varying an air flow rate fed by the first blower without varying an air flow rate discharged from the second blower.

20. A sheet manufacturing apparatus comprising:

the vaporization type humidification unit according to claim 8.