Patent GB-301856-A (GB)
Title: Improvements in or relating to heating and/or cooking installations
IPC: F24D11/00
Filed: 1928-03-07
Abstract: 301,856. Pfeiffer, W. Dec. 7, 1927, [Convention date]. Heat-storing apparatus.-In systems of the kind wherein heat is stored in an accumulator block and is withdrawn by the circulation of an evaporated fluid medium, the withdrawal and utilization of heat, are controlled by regulating the return flow of the condensed medium from the heat-utilizing position to the accumulator block. Water, mercury, glycerine, linseed oil and di-phenyl oxide are stated to be suitable media. The accumulator block 1, Fig. 1, is suspended by steel wires or rods g to minimize the conduction losses, and fitted with electric heaters h, h<1>, The evaporating coil 2 for the medium is connected by a pipe b to the heat-utilizing position 3 which is connected to the coil 2 by flexible return tubes f, e, t, c. The return tubes are adjusted by the lever mechanism a, 4, d so that the inclination of the tube e is altered. As shown in full lines the tube e permits the condensed medium to gravitate back to the coil 2, and as shown in dotted lines, the return of the medium is prevented and the abstraction of beat from the block 1 is therefore stopped. A reverse evaporating coil 36 may be provided. Instead of flexible return tubes, a valve may be inserted :in the return system. The condensate from the heat-utilizing position flows into space 10, Fig. 2, through the pipe r. The passage s returns to the coil 2 and is controlled by a valve v resiliently mounted in a circular yoke 11 connected by a stem k to a disc 12 which is slidable in the bore 13 and is pressed downwards by a spring o surmounted by a disc p in contact with a rotary cam q. A tubular member m is connected at one end to the stem k and at the other end to the valve casing at n. The spring o tends to open the valve v to an extent determined by the setting of the cam q. Increase of pressure in the space 10 collapses the membrane m and moves the stem k upwards against the spring pressure. In an arrangement for central heating, Fig. 4, the accumulator block is heated by combustion products passing through openings 15, the evaporator coils 16, 17, 18 are connected by a rising pipe 19 and branch pipes 20, 21 to the heat-abstracting positions 22 which are connected through valves 23 and bent pipes 24, 25, to the return pipe 26 which leads to a collector 27 connected by a pipe 28 to a control valve 29. The valve 23 is closed positively by the cam and is opened partially, when the cam is adjusted to permit it, by the inherent resilience of the corrugated membrane, and more fully, to varying extents, by the increase in pressure to the valve casing. The valve 29 has a substantially flat member 31 in place of the corrugated sleeve membrane, and the valve 35 is acted upon by a weak compression spring which allows the valve 35 to act as a check to prevent steam from passing directly from the pipe 30 to the pipe 28. The pipe 30 leads to a header z of the coil 16 into which projects a tube u leading to the header z of the coil 17. This arrangement prevents the coils 16, 17 from becoming completely filled and prevents knocking. The main heat storage block may heat another storage block close to the heatutilizing position by an interconnecting closed pipe system. The heat-utilizing means is then heated by a pipe system associated with the second block.