Automatic temperature and humidity regulation – Heating radiator – Thermostatic
Patent
1993-10-12
1995-05-09
Tapolcai, William E.
Automatic temperature and humidity regulation
Heating radiator
Thermostatic
236 99R, G05D 2312
Patent
active
054132770
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention addresses a liquid-filled thermostatic system for controlling heat valves. The system comprises an activating device which is provided with a pressure control and serves to select a desired temperature and acts as a sensor. The system further comprises an operating device which is detachably mounted onto a valve housing and acts on the heat valve. The activating device is connected to the operating device by means of a capillary tube. The activating device is provided with an adjusting knob, a housing comprising a preferably pot-shaped cover and a bottom, a bellows-type tube coaxially disposed inside the housing and a mounting device for mounting the housing to a wall or the like, said mounting device preferably extending circularly around the housing. Together, the housing and the bellows-type tube form a liquid-containing space of a variable volume. The bellows-type tube has a bottom which can be axially adjusted by means of the adjusting knob and an adjusting device.
Liquid-filled thermostatic systems of the kind in question are already known (DE-PS 21 65 231). In these known systems, the activating device is configured such that at its end facing the adjusting knob, the bellows-type tube which is coaxially disposed inside the housing is via a bearing plate mounted to the adjusting knob. The free end of the bellows-type tube extends in direction of the rear plate of the housing, said rear plate acting as a pressure control. This free end extends considerably into an area of the housing which is surrounded by a mounting device by which it is also more or less insulated from the outside.
Accordingly, at least the front part of the sensor of the known activating device comprising the bellows-type tube and the housing is, on the one hand, affected by radiation from the wall and, on the other, insufficiently ventilated at the walls of the housing. In the known system, it is, hence, not possible to exactly detect room temperatures. On the contrary, the activating device is subject to numerous considerable interferences. Satisfactory temperature control is hence not guaranteed.
It is therefore an object of the invention to provide a liquid-filled thermostatic system for controlling heat valves where the activating device is allowed to react to changes in the room temperature while being largely free from interference and where the control variable derived from the room temperature is fed by said acivating device via the capillary tube to the operating device mounted to the valve housing.
SUMMARY OF THE INVENTION
The above and other objects and advantages of the present invention are achieved in the embodiments described herein by the provision of an activating device which comprises an annular base plate defining a central region which is bounded by the base plate, a housing comprising a pot shaped cover and a bottom wall and so as to define a fluid enclosure therewithin, and a capillary line connected to the housing so as to communicate with the fluid enclosure. The housing is mounted to the base plate with the bottom wall of the housing being adjacent or within the central region of the base plate, and with the cover of the housing extending outwardly a substantial distance beyond the central region of the base plate. An axially extendable bellows-type tube is mounted within the housing so as to define a central axis which is generally perpendicular to the base plate, and the tube has a bottom end, and an opposite free end, with the bottom end being mounted to the bottom wall of the housing and with the free end being positioned axially a substantial distance beyond the central region of the base plate. A knob is rotatably mounted to the base plate and so as to generally surround the housing, and the knob and the free end of the bellows-type tube are interconnected so that rotation of the knob causes the free end to move axially within said housing toward and away from the base plate to thereby change the axial length of the tube and the fluid capacity of
REFERENCES:
patent: Re18345 (1932-02-01), Johnsson
patent: 1439750 (1922-12-01), Nelson
patent: 1941359 (1933-12-01), Lawler
patent: 1999732 (1935-04-01), Leins
patent: 2045332 (1936-06-01), Otto
patent: 3108747 (1963-10-01), Nielsen
patent: 3156413 (1964-11-01), Porland
patent: 4290553 (1981-09-01), Molgaard et al.
Buchta Alfred
Tapolcai William E.
LandOfFree
Liquid-filled thermostatic system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid-filled thermostatic system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid-filled thermostatic system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1700046