DIALYSIS MACHINE HAVING MULTIPLE LINE VOLTAGE HEATER
First Claim
1. A medical fluid heating system for operating with different supply voltages comprising:
- first and second heater elements;
first and second switching devices connected electrically to the first and second heating elements;
first and second power lines; and
a control element configured to provide (i) a first switching device state in which power at a first voltage is supplied via the first and second power lines to both first and second heater elements via both the first and second switching devices and (ii) a second switching device state in which power at a second voltage is supplied via the first and second power lines to the first heater element only via the first switching device.
2 Assignments
0 Petitions
Accused Products
Abstract
A dialysis machine having a multiple line voltage heater includes first and second heater elements, first and second switching devices connected electrically to the first and second heating elements, first and second power lines, and a control element configured to provide a first switching device state in which power at a first voltage is supplied via the first and second power lines to both first and second heater elements via both first and second switching devices and a second switching device state in which power at a second voltage is supplied via the first and second power lines to the first heater element only via the first switching device.
58 Citations
20 Claims
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1. A medical fluid heating system for operating with different supply voltages comprising:
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first and second heater elements; first and second switching devices connected electrically to the first and second heating elements; first and second power lines; and a control element configured to provide (i) a first switching device state in which power at a first voltage is supplied via the first and second power lines to both first and second heater elements via both the first and second switching devices and (ii) a second switching device state in which power at a second voltage is supplied via the first and second power lines to the first heater element only via the first switching device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A medical fluid heating system for operating with different supply voltages comprising:
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first and second heating elements; and first and second switching devices connected electrically to the first and second heating elements, wherein the first heating element is powered via the first switching device at a first operating voltage, a resistance of the first heating element configured such that the first heating element provides a maximum heating power output at the first operating voltage, and wherein the first and second heating elements are powered in parallel via the first and second switching devices at a second nominal operating voltage, a resistance of the second heating element configured such that the first and second heating elements in parallel provide at least substantially the same maximum heating power output at the second nominal operating voltage. - View Dependent Claims (15)
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16. A medical fluid heating system for operating with different supply voltages comprising:
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first and second heating elements, the first heating element having a first resistance which is a multiple of a second resistance of the second heating element; and a control scheme in which the first heating element is powered at a first operating voltage and the first and second heating elements are powered at a second operating voltage. - View Dependent Claims (17, 18, 19, 20)
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Specification