Патент USA US2110884код для вставки
March 15, 1938.` F; C. LEONARD ET Ax. ' 2,110,884 THEBMOSTATIC DEVICE Filed May 2l, 1952 I ` . 2 Sheets-Sheet 1> MJMÜJIIII iœntenteei Mar. lig, lg3d ÚNETE@ mais@ frnnlsiuos'mm@ @EVEQUE Frederick C. leonard, Cranston, Ross, Providence, lit. ll. Adpplication lil/Hay 2li, 'lità-EZ?, itc. iiläßßëß 6 Ciaiins. Ourv present invention relates to thermostatic mixing regulators, and has particular reference to regulators for ‘maintaining a desired tempera . ture of flowing Water. ’ , The principal object of our invention is to de vise a thermostatic regulator of inexpensive con struction, adapted to control iiuid `flows accu rately,¿and capable of maintaining the tempera ture of the ñowing fluid substantially constant. A further object of our invention is to design the mixing chamber and theñow area so as to ensure adequate mixing oí the hot and cold streams prior to contact with the thermostaticv element. 15 , - An additional _object of our invention' is to devise valve constructions which are not changed` in setting by variations and relative differences in_ the pressures of the hot and cold fluids. . Another object of our invention is to pro-vide' 20 a regulator construction that is extremely rug ged, is not easily deranged, and cannotbe ren dered inoperative short of actual' breakage. Withzthe above .and other objects and advan tageous features in View the invention consists _25 of a novel regulator construction and a novel inlet flow control therefor, more fully disclosed in the detailed description following, in conjunction `with the accompanying drawings, and more par ticularly deñned in the claims appended thereto. 30 In the drawings, . Fig. 1 is a top plan view of the novel regulator; Fig. 2 is a view thereof with the front portion removed, showing the flow control valve; Fig. 3 is a section on the line 3-3 of Fig. 1; 35 Fig. 4 is a section on the'li'ne 4-4 of Fig. 3; Fig. 5 is açbottom View of the front‘portion, showing the thermostatic coil; Fig. 6- is an enlarged view of the valve ' ' and valve ' seat; 40 Fig. 7 is a section of Fig. 6 on the line 'l-Í-l; and screw threadedly or otherwise engage the flange i2. ' , ' As best shown in Fig. e, the back member has two inlets, it, lll threaded to receive the corre spondingly threaded ends iii; it of inlet-conduits for ñuids of different temperatures. The incom ing ñuids enter chambers ift, 2i in which cylin dn‘cal strainers 22, ‘23 are mounted, the' strainers being secured at the`r outer endsv to caps 22d, iti which'are threaded )in suitable openings in the ends of the chambers andare thus adapted to be readily removed for cleaning. The inner ends of the strainers engage the ends of bearing nipples 2li, 25 which are screw threadedly vmounted at the other ends of the chambers, and have recesses 2G, 2l which receive the ends of an inlet cylinder 2B which .as shown is provided with a partition 29 or the like to keep the entering fluids from mix ing. The cold side of the inlet cylinder has three ' lateral ports 3&9, and the hot side hastwo lateral ports 3l, these ports being controlled by a slide valve 32,' having opposed conical faces 3d and a central groove tt for receiving the operating arm ofthe thermostatic control, as hereinafter de scribed. The inlet cylinder is positioned so as to direct the-inñowing streams of fluids generally away from the thermostatic coil», thus producing mixing before the fluids reach the thermostatic coll. Referring to Figs. 2 and 5, now, the front mem- . ber is cup-shaped to house the thermostatic ele- ` ment 35, this element being formed as a spiral coil.. An operating shaft 3B is rotatably mounted in the central bushing 31 of the front member, which is recessed to receive the usual packing 33 held in place by the flange nut 39 which screw threadedly seats- in the central bushingA recess. The end-l of the operating shaft is reduced slightly r. to form a shoulder dû, and seats in a bore 4i _of a thrust bearing member 42 provided in the back 40 Fig. 8 is a section of Fig. 6 on the line 8_8; and ' member, whereby the operating- shaft and its operating parts cannot be forced down, as for Fig. 9 _is a sectional >view of a -modified con example by a blow on the handle or the end of the struction of the valve and v'alve seat. _ shaft, so as to damage the valve mechanism. -Referring to the drawings, the improved regu _ A radial plate 43 is pinned or otherwise se 45 45 l‘ator comprises a front member i0 in which the cured to the shaft 36, and is bent over at its end ì thermostaticeleinent, the setting mechanism, and to provide a lock plate M which is riveted or the valve operating mechanism are housed, and va back member l i in which the valve mechanism 0 is housed, both members being preferably cast of brass. The back and front members lhave an nular machined flanges l2, I3 between which a 'packing I4 is positioned, the two members being secured-together' by screws or the-like i5 which 55 pass through suitable openings in the ñange i3 otherwise secured to the outer end of the ther mostatic coil. A thimble ¿iii is rotatably mounted cn the `shaftl 3% and is secured to the'inner end 50 of the thermostatic element. and has an operat~ ing arrn?i‘i, preferably integral therewith, with a depending finger 58 which is positioned in the. valve -groove 3d. The end' oi the operating shaftl is squared to receive a handle 49 and a pointer 55 v2,110,884 2 I or lindicator 50, whichV may cooperate with 'a of the control mechanism. This construction- graduated'temperature plate mounted as indi cated by the dotted line _in Fig. 3, 'or may be balances the flow- to the nìixing chamber, and thus controls vthe-inlet areas independently of bent over to cooperate with indications on the fluid _pressure differences or variations.- If the front _member such as shown in Fig. 1. pressure of the fluids is high, it may be advisable ` 'I'he mixed fluid passes upwardly from the valve chamber„th1jough the thermostatic coil, to mount stationary deflectors around the rods and out through the outlet chamber 5|, see Fig. 3, . which as shown is separated from the'valve f io chamber by a‘partition> 52. ' 60. to deflect the water away from the conical portions 6| .and ,thus eliminate side thrust of the l inñowing iluids bn the valve mechanism. ~ While we have described speçiñc embodiments It has been found that surge is produced where .of our invention, such changes in` the design, in_ pocketsfof hot and cold water are alternately the proportions, and in the arrangement of the formed within the regulator. ‘and that the above parts may be made to suit particular or special described construction prevents surge _by direct requirements for thermostaticy regulators, with ing most- of the incoming fluid into the mixing ' out departing from the spirit or the scope ofthe 15 chamber, andpermitting a small amount of the \ invention as defined in the appended claims. hot and the cold fluid to enterthe upper cham ber. It has also been -determined that better 1. In a thermostatic regulator, a mixing cham _regulation-is obtained if the inlet opening for the cold water is slightly larger than the inlet opening for the hot water; although the reason for this is not‘clear, the experimental informa ybei', `inlets for conducting hot and cold fluid to« said mixing chamber. reciprocatable valve mech - tion obtained has indicated that- the combination thermostatic element ñxed at one end to saidcontrol shaft, vand having an element at the other of three inletI pcr'ts for the cold water and two 25 inlet ports for the hot fluid is satisfactory. The valve mechanism described is balanced, as J. the fluid inlets- dirèct the flow across the valves. The valve is not _therefore añected by variations -or relative differences intheI pressures of the hot and the cold fluids, as the entering streams are s anismI controlling flow from said inlets to said mixing chamber, a rotatable control shaft, a end operatively con i ected to saidvalvev mecha nism,`and a thrust aring engaging saidvcontrol shaft to limit movement of said control shaft and its associated mechanism towards said valvemechanism. . y 2. In a thermostatic regulator, a mixing cham-l in substantially parallel planes. Observation has ber, inlets for conducting hot .and cold fluid to . disclosed that the hot and cold streams diverge said mixing chamber, valve mechanism control ling flow from said inlets to said mixing chamber, towards the sides,'as 'the flow begins, and then become radial with respect to .the inlet cylinder 35 as the flow increases. Preferably, the ports are positioned so that the outñowing ñuids do not a rotatable control shaft,~ a thermostatic element ' ñxed at one end to lsaid control shaft, and having , an element rotatably mounted on said control directly `contact the thermostatic- element whichE‘ shaft and at the other end operatively engaging is mounted in the front member. The lconical form- of the valve ends has been found to facili -40 tate the mixing of the hot and coldflnids. , said valve mechanism, and a thrust -bearing en gaging said control shaft to limit movement of said control' shaft and its sociated mechanism «Referring to Figs. 3 and ¿4, vthe operation of. towards said valve mecha m. the novel: small flow thermostatic regulator mayk 3. In a thermostatic regulator, a b_ack member . nowjbe explained: g having iiuid inlets for hot and cold fluid and valve mechanism for controlling flow -of said fluids, 45 the pointer or indicator opposite the desired tem and a front member having a control> shaft,-a perature indication; at this setting the thermo __thermostatic element secured at one end to said static coil assumes a position suchv that it would shaft, and having an operating element at the be without strain, if the >temperature of the other end ofsaid thermostatic element rotatably The `-handle-is ñrst manually turned to bring mixed fluid ñcorresponded to the temperature mountedl on said control shaft and operatively indication. connected to said valve mechanism, and a thrust 'I‘he hot and cold water streams en tering the inlet cylinder pass radially through v>bearing in said back member for the end ofisaid the inlet ports, and- mixto pass'between the thermostatic coils to the outlet chamber. As will 4. In a thermostatic regulator, a back mem be noted from Fig. 3, the available ñow space is _ber having fluid inlets for.hot and cold fluid and restricted to a minimum, thus forcing, the mixed valve ~mechanism for controlling' ñow, of said control shaft. A >fluid to pass through the vthermostatic coil con ..volutions `and ,tg-)_ `the outlet chamber, without local eddies or disturbances'._ . - - \ -fluids, Vand a front member having' a control shaft, a thermostatic element secured at one end to said shaft, and having Aan operating element at- the other end of said thermostatic element rotatably from the set temperature dueto change in tem-l mounted on said control shaft and .operatively perature of the hot, or‘cold fluid', the thermo-- engaging said valve ‘(mechanism, and a thrust If the temperature of the" mixture changes static coil expands or contracts to shift _the valve bearing. in said backl member for the end of said and thus vary the relative volume of hot and cold control 'shaftf ' ' ' iiuid. The radial inlet;ports,lthe conical form'> 5.- In a mixingvalve, a mixing chamber, an'out 65 of the valve ends, the mixing, and the'limited let chamberl adjacent thereto and 'separated flow space, result in anl instant response to tem-4 therefrom by a partition, a thermostatic cham perature changes) without surging. ber freely' communicating with the mixing '_and ' If desired, a' balanced yvalve construction such outlet chambers, means comprising a 'tubular conduit device having a central partition and 70 the inlet chambers 53, 54 have lateral ports 55,. lports on each side of said partition for conducting 56, controlled by a slide valve 5l which has two a hot and a cold fluid into said mixing chamber, as shown in-Fig. 9 may be used. In this form, cylindrical valve sections 58, 59, the sections be valve mechanism for controlling the relative ifm secured by spiders to central rods 6I! which ` quantities of said fluids, and thermostatic means ' ` end- in inner`conical portions 6| witha central‘ in said thermostatic chamber operatively control groove 62 adapted to receive the operating ringer. ling said valve mechanism. ' andan 6. In a mixingvalve. a mixing chamber. an outlet chamber, a. thermostatic chamber freely communicating with the mixing and outlet chambers, means comprising a. tubular conduit device having a central partition and ports on each side of said partition for conducting a hot and a cold ñuid into said mixing chamber, valve mechanism slidably mounted on said tubular con duit device for controlling the relative quantities 3 of said fluids. said valve mechanism comprising conical deiiectoi'. elements positioned _adjacent said p_orts and inclined to direct the hot and cold iiuids from said ports »towardsœach other, and thermostatic'means in said thermostatic chamber i; , operatively controlling' said valve mechanism. FREDERICK c. LEONARD. GERMAIN Ross.