Electrical heater for flow control device
US10976761B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2018 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Jun 4, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B1/0244
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A fluid heater includes a heating circuit, a temperature monitoring circuit, a controller, and an overheat sensing element. The controller is disposed in a control unit and is in circuit communication with a temperature gauge and a power supply switch, the controller being configured to operate the power supply switch in response to feedback from the temperature gauge to maintain the heater at a setpoint temperature. The overheat sensing element is disposed in a heater housing proximate to a thermal fuse and is in circuit communication with the controller to provide an indication to the controller when the overheat sensing element reaches an overheat temperature lower than the critical temperature. The controller is configured to operate the power supply switch to reduce or shut off power to the heating element in response to receiving the indication that the overheat sensing element has reached the overheat temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.