IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0969008
(2001-10-02)
|
우선권정보 |
EP-0203398 (2000-10-02) |
발명자
/ 주소 |
- Kodden, Hans
- De Haan, Thijs
- Kaastra, Simon
|
출원인 / 주소 |
- Koninklijke Philips Electronics N.V.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
4 |
초록
▼
Water flow heater with a first heater element (20) for supplying a fixed power, a second, controllable heater element (30), a temperature sensor (40, 50) for measuring the temperature of heated water, and a control unit (22, 32, 80) for controlling the heat supply from the second heater element (30)
Water flow heater with a first heater element (20) for supplying a fixed power, a second, controllable heater element (30), a temperature sensor (40, 50) for measuring the temperature of heated water, and a control unit (22, 32, 80) for controlling the heat supply from the second heater element (30) in dependence on a temperature detected by the temperature sensor (40, 50). A water flowrate lying within a predetermined range is safeguarded in that a pump (60) is provided for generating a water flow through a channel (13), and the control unit is designed so as to activate the heater elements (20, 30) in dependence on activation of the pump (60). As a result, the first heater element (20) of fixed power can have a comparatively high power rating without the risk of water being too strongly heated thereby.
대표청구항
▼
1. A water flow heater for heating water, comprising: a channel (13), a first electric heater element (20) for heating water in a first heating section (21) of the channel (13), a second electric heater element (30) for heating water in a second heating section (31) of the channel (13), and me
1. A water flow heater for heating water, comprising: a channel (13), a first electric heater element (20) for heating water in a first heating section (21) of the channel (13), a second electric heater element (30) for heating water in a second heating section (31) of the channel (13), and means (40, 50) for measuring the temperature of water in the channel (13) in at least one measuring position (41, 51) downstream of at least one of said heating sections of the channel (13), a signal generator (64) for generating a water flow signal in accordance with a flow of water through the channel (13), and a control (22, 32, 80) coupled to said means (40, 50) and to at least the second heater element (30) for controlling the heat output from the second heater element (30) in accordance with a temperature sensed by said means (40, 50), wherein said heater elements (20, 30) are connected to said signal generator (64) for activating said heater elements (20, 30) in response to a water flow signal, and wherein the first heater element (20) is connected for supplying a fixed, substantially constant power, characterized by a pump (60) for generating a water flow through said channel (13) and a control member (63) for activating the pump (60), while the signal generator is constructed as a connection (64) to said control member (63) for generating a water flow signal in conjunction with an active triggering of the pump (60). 2. A water flow heater as claimed in claim 1, wherein said means comprise at least a temperature sensor (40) whose measuring position (41) is situated downstream of at least a portion of said first heating section (21) and upstream of at least a portion of said second heating section (31). 3. A water flow heater as claimed in claim 2, wherein said means comprise a second temperature sensor (50) which is positioned for measuring the temperature of water in the channel (13) in a measuring position (51) downstream of said second heating section (31) of the channel (13). 4. A water flow heater as claimed in claim 1, wherein the control (22, 32, 80) is designed for controlling the heat output from the second heater element (30) in steps. 5. A water flow heater as claimed in claim 1, wherein the control (22, 32, 80) is designed for controlling the heat output from the second heater element (30) such that water is heated to a temperature of 75 to 100° C. 6. A water flow heater as claimed in claim 1, wherein the heater elements (20, 30) have a total maximum power, and wherein the first heater element (20) has a power accounting for at least two thirds, and preferably three quarters of the total maximum power of the heater elements (20, 30) together. 7. A water flow heater as claimed in claim 1, wherein the control is designed for switching on first at least one heater element in response to a switch-on signal from a user, and for switching on the pump (60) after a certain heating-up period of the at least one heater element. 8. A device for preparing hot drinks in individual servings, provided with a water flow heater as claimed in claim 1. 9. A device as claimed in claim 8 wherein the device is a coffee-maker (100).
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