Heating boiler

Abstract: The boiler which is the object of the present invention comprises a vertical metallic vessel (1) occupied by a mass of thermal fluid (2) and with connection pieces (4) connected to a closed heating circuit. The vessel houses two conical deflectors (18, 19) having vertical axis connected at their vertices and determining a zone of reduced cross section in the middle portion of the internal space of the vessel which comprises in its lower portion a heat generator of any kind (3) and a serpentine pipe (12) with valves (13, 14) at the ends thereof, and in the upper portion another serpentine pipe (15) with valves (16, 17) at the ends thereof, one of said valves being in correspondence with the base of the upper deflector and the other with the exit conduit. The head of the vessel also comprises an air discharge valve (5). The invention is based on the improvement of the performance and the increase of energy which results from the zero-gravity within the installation system in case that the boiler is adapted to work under said conditions. Thus, it is obvious that for obtaining the maximum efficiency of the boiler which is the object of the invention the disclosed system must function in a zero-gravity state.

Description: The present invention refers to a heating boiler as set forth in the preamble of claim 1. A heating boiler of this kind is known from DE-U-8 716 241. Various types of heating boilers are known which are heated by electric current or by various fuels and which produce a flow of heated water or other fluid for its circulation through the conduits associated to closed heating circuits. Although efforts are made to provide such apparatus with a good thermal insulation a great many of the known heating boiler systems actually have energy losses through the insulation due to defects in the design and in the construction thereof as well as by losses in the conduits or other parts of the circuit which result in a relatively low efficiency of the whole installation. The heating boiler disclosed in aforementioned DE-U-8 716 241 comprises a block including a vertically arranged, thermally insulated vessel filled with water, a circulation pump, a gas burner in the lower portion of said block, an outlet conduit connected to the upper portion of said vessel, a control apparatus and an expansion vessel disposed in a common housing. It is the object of the invention to provide a heating boiler which is working under conditions which increase its caloric capacity and as a consequence increase the total efficiency of an installation connected thereto. This object is attained by the features of claim 1. Preferred embodiments of the invention are subject matter of the dependent claims. In the heating boiler of the invention, the heat supply is effected by any kind of thermal energy, said input energy being directly used for heating of the mass of a thermal fluid which occupies the interior of a thermically insulated vessel, and in which interior a circulation zone in form of a double cone is provided. From the upper portion of the vessel extends the conduit which is directed to the closed circuit installation in order that the heating fluid circulates with the aid of a driving pump, creating a system operating as a unit, such as a heating installation. In this installation we establish a vacuum pressure state in utilization of which the fluid to be heated expands, and in the upper portion of the vessel an outlet valve permitting to vent the air eventually present in the mass of the fluid to be processed at the introduction thereof into the vessel is provided as well. Thus, the operation of the boiler and of the installation performs in a vacuum pressure state in the conduit from which - exactly speaking, by effect of the fluid circulation - originates a resulting vacuum in the conduits which converts into a considerable increase of the caloric energy, improves the heat transmission conditions, reduces the flow resistance of the fluid circulating through the conduits and importantly reduces noise emanating from said circulation. In order to facilitate the explanation, the present description is accompanied by a drawing in which as an illustrative and not limiting example an embodiment of a heating boiler in accordance of the principles of the claims is shown. The figure schematically shows the structure of the new heating boiler, constructed to operate in a vacuum pressure state in which the whole installation must operate, which is required in order to obtain an increase of caloric energy and to improve the heat transmission. In the boiler, the elements designated by numerals correspond to the following indicated parts. The vessel 1 in form of a cylindric container of resistant metal sheet and vertically arranged is occupied by a mass 2 of a thermal fluid of suitable density, fluidity, boiling point and other characteristics. In the lower portion of the vessel 1 an electric resistance element 3 (or a heat applicator of other kind) is situated for heating the mass 2 of the fluid. A connection piece 4 forms the entrance for returning the fluid after its circulation through the closed circuit installation. In the upper portion of the vessel 1, a one-way valve 5 is provided, the object of which is to permit venting of air eventually introduced into the interior of the vessel 1, establishing a discharge of same which assures practically a vacuum condition within the vessel 1 not occupied by the thermal fluid. That is to say, it results therefrom that in the portions in each moment not occupied by the fluid, not only no air is existent but also a vacuum effect is obtained which contributes to the improved heat transfer. Furthermore, in the upper portion of the vessel 1 an outlet conduit 6 is provided, receiving the warm water entering through orifices 7 provided in said outlet conduit 6, the warm water circulating towards a conduit 8 suitably thermally insulated at its outside and comprising a circulation pump 9. A connection piece 10 of the heating boiler is coupled to the closed circuit installation. The container 11 is an expansion vessel used to even out the fluid circulation. Characteristically, the vessel 1 comprises in its lower portion a serpentine pipe 12 the ends of which are respectively associated to valves 13 and 14, whereas in the upper portion another serpentine pipe 15 is located the ends of which comprise valves 16 and 17. The serpentine pipes 12 and 15 serve to establish minimum temperature differences, acting as probes for actuating the valves 13, 14, 16 and 17. When being at a higher temperature than the fluid of the boiler, the valves 16 and 17 open in the same manner as conventional safety valves do and, in turn, to eject the warmer fluid towards the tubing, the valves 13 and 14 open simultaneously to fill with fluid. The valves 16 and 17 are actuated by expansion, as converted to pressure, and the valves 13 and 14, inversely connected, are actuated by vacuum. In each serpentine pipe a valve is mounted inversely with respect to the other. Furthermore, it is a characterizing feature of the disclosed heating boiler that in the interior of the body 1 two baffles or deflector elements of conical shape for the thermal fluid are provided, designated by numerals 18 and 19 and mounted with their vertices opposing each other, defining there a restricted central zone 20 which determines, according to the venturi principle, an increase of the circulation velocity of the heated fluid circulating vertically in the upward direction. Said conical elements 18, 19 are supported within the vessel 1 by a plurality of rods 21 extending from the portion where the lower and upper conical elements are joined with each other. The conical elements 18 and 19 are closed at their bases. However, said bases are penetrated by said lower and upper serpentine pipes 12 and 15, respectively, enabling a flow of fluid into and out of the interior of said conical elements 18 and 19 upon opening of the aforementioned valves. It is essential that the position of the valve 14 enabling an input flow into the lower conical element 18 is as depicted in the drawing or at a similar suitable location in order that a temperature difference between the interior of conical element 18 and the zone where said valve 14 as situated develops upon supply of heat by heater 3. Said conical elements serve to even out the circulation of the thermal fluid and to obtain a homogenization between the different portions thereof, in order that the temperature differences between the fluid returning from the lower connection piece 4 and the fluid leaving by the upper conduit 6 affect the uniformity to a miminum. The essential aspects of the invention can be brought to practice in other forms of realization which differ in their details from that given as an example in the description and which likewise will fall under the protection as claimed. Thus, it can be constructed in any form or size and from the most adequate materials.

Claims: Heating boiler, comprising a vertical cylindrical vessel (1) having an efficient thermal insulation, said vessel (1) being occupied by a thermal fluid (2) heated by any type of caloric energy source (3) situated in the lower portion of the vessel (1) and circulating through the upper portion to an outlet conduit (6,8) characterized by two conical deflectors (18,19) closed at their bases being disposed in the interior of the vessel (1) to control the circulation of the thermal fluid (2), the zones of smaller diameter opposing each other to determine a zone (20) of reduced cross section, an air discharge valve (5) being disposed in the upper portion of said vessel (1) to vent any air from said vessel (1) and to establish a vacuum pressure state, and separate serpentine pipes (12,15) being provided in the upper and lower portions of the vessel (1), the ends of said serpentine pipes (12,15) being associated to respective valves (13,14;16,17) opening and closing simultaneously, and each one of said serpentine pipes (12,15) extending through the base of a respective one of said conical deflectors (18,19). Heating boiler according to claim 1, wherein the base of the lower conical deflector (18) is exposed to the thermal energy source (3), whereas the base of the upper conical deflector (19) is directed to the exit conduit (6) of the thermal fluid. Heating boiler according to claim 1, wherein the air discharge valve (5) of the upper portion is of a one-way type, preventing a return of the ejected air. Heat generating or heating system comprising a heat exchanger and a heating boiler of one of claims 1 to 3 in a closed circuit installation, wherein the circulating fluid is in a vacuum pressure state to create physical conditions in the system which increase the heat generation and the caloric transmission.

Inventors: URBINA CASANOVAS PAU, URBINA CASANOVAS, PAU
Applicants: URBINA CASANOVAS PAU, URBINA CASANOVAS, PAU
Application year: 1990
Main classification: F24H1
IPC codes: F24H1