Means for preventing heat build-up in a wall-mounted room ventilator
US3958100A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1974 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Jan 11, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D27/008
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A wall mounted room ventilator apparatus includes a blower driven by a two speed electric motor, electric lighting means and electric heating means. A selector switch is provided for selecting operation of at least (1) only the lighting means, (2) only the heating means (3) the blower at its high speed alone or in combination with the heating means and lighting means to provide a ventilation function. In order to prevent heat build-up in the apparatus when only the lighting means is energized, a normally open thermostatic switch is positioned in the housing of the apparatus and arranged in circuit between the selector switch and the blower motor for driving the blower at its low speed when the thermostatic switch is closed by the temperature within the apparatus exceeding a predetermined temperature. In one arrangement the thermostatic switch is also arranged in circuit with the selector switch and blower motor to drive the blower at its low speed when heat only is selected and the temperature in the apparatus exceeds the predetermined temperature. In an alternative arrangement the blower is driven at its low speed independently of the thermostatic switch when heat only is selected…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.