Apparatus for generating steam

Patent metadata

Field	Value
Publication number	US-10330308-B2
Application number	US-201715649695-A
Country	US
Kind code	B2
Filing date	Jul 14, 2017
Priority date	Dec 30, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

The present application relates to apparatus for generating steam. It comprises a water inlet, a evaporation surface, and a heater disposed adjacent to the evaporation surface to heat the evaporation surface to a predetermined temperature such that water fed onto the evaporation surface via the water inlet forms a film on the evaporation surface and is evaporated. The apparatus is configured so that water is fed to one or more regions of the evaporation surface, and the temperature of the water fed onto the evaporation surface is lower than the predetermined temperature, so that scale on the or each region of the evaporation surface to which water is fed cools at a different rate at which water on a remainder of the evaporation surface cools. This causes scale on the evaporation surface to break apart and be dislodged from the evaporation surface.

First claim

What is claimed is:

1. An apparatus for generating steam comprising:
at least one water inlet,
an evaporation surface,
a heater, disposed adjacent to the evaporation surface, configured to heat said evaporation surface to a predetermined temperature,
a controller configured to:
direct a flow of water through the at least one water inlet onto at least one region of the evaporation surface, wherein the at least one region of the evaporation surface comprises multiple spaced regions,
said water, fed onto the multiple spaced regions of the evaporation surface in one of: at a same time or at alternating times, having a temperature lower than the predetermined temperature, wherein a scale, caused by an evaporation of the water in the at least one region cools at a different rate than a scale, formed on a remainder of the evaporation surface, thereby causing the scale formed on the remainder of the evaporation surface to break apart and be dislodged from said evaporation surface.

2. The apparatus according to claim 1 , wherein the controller is configured to:
control the flow of water onto the evaporation surface based upon the predetermined temperature.

3. The apparatus of claim 1 , wherein a rate of flow of water through the at least one water inlet is based upon all water fed onto the evaporation surface being evaporated from said evaporation surface.

4. The apparatus of claim 1 , further comprising:
a pump configured to:
move water to the at least one water inlet.

5. The apparatus of claim 4 , wherein the pump is configured to:
dose or pressurize the water through the at least one water inlet.

6. The apparatus of claim 1 , further comprising:
a valve configured to control a flow of water through the at least one water inlet.

7. The apparatus of claim 4 , wherein the controller is configured to:
operate the pump to control at least one of: the rate and an amount of water supplied through the at least one water inlet.

8. The apparatus of claim 1 , comprising:
a scale collection region, remote from said evaporation surface, said scale collection region configured to collect scale that has dislodged from said evaporation surface.

9. The apparatus of claim 8 , further comprising:
a casing defining a steam chamber, the evaporation surface being formed on an evaporation element which extends into the steam chamber from one side of the casing and the scale collection region formed within the steam chamber, adjacent to the evaporation element.

10. The apparatus of claim 9 , wherein the evaporation surface comprises a dome shaped profile.

11. The apparatus of claims 1 , wherein the least one region includes recessed features.

12. A steam iron comprising:
an apparatus for generating steam comprising:
at least one water inlet,
an evaporation surface comprising multiple spaced regions,
a heater disposed adjacent to the evaporation surface configured to heat said evaporation surface to a predetermined temperature,
a controller configured to:
direct a flow of water through the at least one water inlet onto at least one region of the multiple spaced regions of the evaporation surface, said water, fed onto the at least one region of the evaporation surface in one of: at a same time or at alternating times, having a temperature lower than the predetermined temperature, wherein a scale, caused by an evaporation of the water in the at least one region cools at a different rate than a scale, formed on a remainder of the evaporation surface, thereby causing the scale formed on the remainder of the evaporation surface to break apart and be dislodged from said evaporation surface.

13. The steam iron of claim 12 , further comprising:
a pump configured to:
move water to the at least one water inlet; and

a valve configured to control a flow of water through the at least one water inlet.

14. The steam iron of claim 12 , wherein a rate of flow of said water is based on evaporating all water directed to the at least one region.

15. The steam iron of claim 12 , wherein the evaporation surface comprises a dome shaped profile.

16. The steam iron of claim 12 , wherein the least one region includes recessed features.

17. The steam iron of claim 12 , further comprising:
a casing defining a steam chamber, the evaporation surface being formed on an evaporation element which extends into the steam chamber from one side of the casing the scale collection region formed within the steam chamber, adjacent to the evaporation element.

Assignees

• Koninklijke Philips Nv

Inventors

• Chua Hee Keng
• Ching Boon Khian
• Jiang Yong

Classifications

• F22B1/288

  Instantaneous electrical steam generators built-up from heat-exchange elements arranged within a confined chamber having heat-retaining walls · CPC title

• F22B37/48

  Devices or arrangements for removing water, minerals or sludge from boilers (cleaning water tubes, furnace tubes or the like of boilers F28G) {; Arrangement of cleaning apparatus in boilers; Combinations thereof with boilers} · CPC title

• F22B1/303

  with means for injecting or spraying water against electrodes or with means for water circulation · CPC title

• D06F75/18

  the water being fed slowly, e.g. drop by drop, from the reservoir to a steam generator · CPC title

• F22B1/287 Primary

  with water in sprays or in films · CPC title