US3664373A

US3664373A - Apparatus for hot-water and heating installations

Info

Publication number: US3664373A
Authority: US
Inventors: Karl Schichl
Original assignee: Individual
Current assignee: Individual
Priority date: 1969-11-20
Filing date: 1970-11-18
Publication date: 1972-05-23
Anticipated expiration: 1989-05-23
Also published as: DK136670C; GB1300460A; FR2069664A5; LU62072A1; DK136670B; ES384844A1; BE759231A

Abstract

A circulating pump with a mixer valve combined to form an apparatus especially for hot-water and heating installations, wherein the pump drive is utilized also for the automatic control of the mixer valve. The mixer unit is locked in specific positions by a remote-control unlatching device either by a likewise remote-controlled synchronizing device in engagement with the pump impeller making this possible over one rotation, or this is effected by a hydromechanical coupling whereby liquid raised through the pump is put into a rotary motion.

Description

United States Patent Schichl [54] APPARATUS FOR HOT-WATER AND HEATING INSTALLATIONS [72] Inventor: Karl Schichl, Ottweilerstr. 2, 8 Munich 83,Germany [22] Filed: Nov. 18, 1970 [21] Appl. No.: 90,505

[30] Foreign Application Priority Data Nov. 20, 1969 Germany ..P 19 58 277.5 Mar. 25, 1970 Germany ..P 2O 14 415.4

52 us. Cl. ..137/565, 60/52 us 511 lm. Cl ..Fl5h 15/18 581 Field of Search ..60/52 US; 137/564, 565

[56] References Cited UNITED STATES PATENTS 3,360,930 1/1968 Haag ..60/52US 51 May 23,1972

Primary ExaminerHenry T. Kiinksiek Attomey-Curt M. Avery, Arthur E. Wilfond, Herbert L. Lerner and Daniel J. Tick [57] ABSTRACT A circulating pump with a mixer valve combined to form an apparatus especially for hot-water and heating installations, wherein the pump drive is utilized also for the automatic control of the mixer valve. The mixer unit is locked in specific positions by a remote-control unlatching device either by a likewise remote-controlled synchronizing device in engagement with the pump impeller making this possible over one rotation, or this is effected by a hydromechanical coupling whereby liquid raised through the pump is put into a rotary motion.

18 Claims, 11 Drawing Figures PATENTEDMAY 23 m2 3. e64, 373

SHEET 1 [IF 6 H H! W PATENTEDMAY23 1912 I V 3.664.373

SHEET 2 UP 6 FATENTEBMAY 23 I972 SHEET 3 01' 6 Fig. 4

PATENTEDMAYZB I972 3. 664,373

sum 5 0F 6 Fig. 11

l l 104 1 I APPARATUS FOR- HOT-WATER AND HEATING INSTALLATIONS My invention relates to a circulating pump with a mixer valve fitted in the pump housing, especially for hot-water and heating installations, wherein the mixer preset disk and the pump impeller are fitted concentrically to each other in a casing and the mixer connections are mounted on the periphery of the casing.

In hot-water and heating installations, a mixer valve is used beside the circulating pump that keeps the water circulation in motion. Usually a three-way or four-way mixer valve is used for this purpose. Depending on the design of the plant, the mixer valve may have two or three settings. In known arrangements of this type, the driving motor for the pump impeller is fitted on one side of the case containing the pump impeller and the mixer preset disk, while a hand control lever is provided on the other side for adjusting the mixer setting disk. Such manual operation of the mixer valve is replaced by an automatic control in those cases where the object is as continuous a control-as possible of the plant water temperature. For this, the mixer setting disk requires a special drive actuated through a thermostat-regulated control loop. Such an automatic operation for a circulating pump with a mixer valve may also conceivably be used for other than heating purposes.

It is one object of my invention to provide simple automatic means for controlling the mixer valve with minimal complexity for a circulating pump of the type described.

To this end, and in accordance with one feature of my invention, the case and the mixer preset disk are so shaped that the subspace occupied by the pump impeller is directly connected on one side to one mixer connection independently of the position of the mixer preset disk and on the other side to one or other of the mixer connections through the mixer preset disk, the connections being adjacent to the mixer connection directly joined to the pump impeller subspace. The mixer preset disk, fixed in each of its specified positions by a releasable stop device, is coupled with the impeller through a remote-control synchronizing device providing for its rotation.

According to another feature of my invention, a hydromechanical coupling which induces a rotation of the mixer preset disk is provided between the liquid supplied by the impeller and the mixer preset disk, and the mixer preset disk is thus locked in specific stop positions by a remote-controlled unlocking device.

The invention will be further described with reference to the embodiments thereof, illustrated by way of example in the accompanying drawing in which:

FIG. 1 is a plan view of a simplified projection of one arrangement illustrating a first feature of the invention.

FIG. 2 is a perpendicular longitudinal cross-sectional view of the arrangement shown in FIG. 1 in simplified form taken along line 11-".

FIG. 3 is a plan view of a mixer preset disk used in the arrangement of FIG. 2.

FIG. 4 is a diagrammatic representation of a preferred embodiment illustrating a second feature of the invention.

FIG. 5 is a view of embodiment of FIG. 4 taken along line VV.

FIGS. 6-10 illustrate various alternative settings for valves used with my present invention.

FIG. 11 is a diagrammatic representation of a further embodiment of the second feature of the invention.

Referring to the illustrations, particularly to FIGS. 1, 2 and 3, the combination of the mixer valve and circulating pump as shown therein into one constructional unit, eliminates the need for the special connection of the circulating pump to the heating pipe system, while the four mixer connections KV, HV, HR, KR are retained. FIG. 2 is a sectional view of a casing 1 of the combined arrangement of mixer valve and circulating pump, the mixer connections being spaced at 90 from adjacent connections on the periphery of casing 1.

The longitudinal section of the arrangement through line lI-Il as in FIG. 2 shows the essential constructional features.

cludes a chamber 4 with the mixer connections KV, I-IV, HR

and KR, against which the motor emplacement 2 is sealed watertight. Driving shaft 3 extends through a partition 5 into chamber 4 and restsin the left front shell of casing l. The impeller 6 of the circulating pump is fastened concentrically on driving shaft 3 in chamber 4 and alongside partition 5. Also mounted concentrically to thedriving shaft 3, is a mixer preset disk 7 performing the function of the mixer trap as in FIG. 1, which has a beakerlike cross-section and its interior 8 is open toward the impeller 6. Apertures 7' set at are provided on the periphery inside the annular shell of the mixer preset disk, whose apertural face conforms to the inside diameter of the mixer connections. In the region of the mixer connection HV, the aperture 7 is covered by a partition section 4' extending over the mixer preset disk. The chamber 4 is further subdivided into two subspaces by the partition 4" between the impeller 6 and the mixer preset disk 7, which partition extends over slightly more than two thirds of the sectional area of chamber 4. An internal aperture 9 of the beakerlike mixer preset disk 7 is cone-shaped, into which a conical carrier disk 10, cross-sectionally matching the aperture 9, engages. The carrier disk 10 is connected with a stud 13 mounted in the concentric bore of the hollow driving shaft 3 through a bolt 1 l which is carried in axial elongated slots 12 of the hollow driving shaft 3. The stud 13, one end of which projects throughthe right-hand front shell of casing l, is pressed against a coil spring 14 toward a stop 15 which is so dimensioned that the carrier disk 10, rigidly connected with the stud 13 through the bolt 1 1 and set in this position representing the steady position of the stud 13, is freely rotatable in the space of the aperture 9 of the mixer preset disk 7. The end of the stud l3 projecting from casing 1 engages frictionally with a linkage 16, which is actuated through an eccentric plate 17 of an electromagnetic control (not shown) housed in a gear casing 18, in such a way that the stud 13 is pushed axially leftward against the pressure of the coil spring 14 and thus engages the carrier disk 10 with, the mixer preset disk 7. As FIG. 3 shows, the eccentric plate 17 of the electromagnetic control is synchronously connected with an unlocking linkage 19 for a spring locking catch 20 which locks the mixer preset disk 7 in its specified position of rotation.

As can be seen in FIG. 2 and still better in FIG. 3 which shows a single representation of the mixer preset disk 7 in plan view, this disk carries radial supports 21 extending over the whole of its depth and proceeding as an extension of a diameter of the mixer preset disk 7, subdividing also the beakerlike interior 8 of the mixer preset disk into two subspaces 22 and 22'. Radial supports 23 running at right angles to radial supports 21, and of which one is visible in FIG. 3, are substantially lower in height than supports 21 and serve exclusively for stiffening the mixer preset disk. As further shown in FIG. 3, there are also inside the outer annular wall of the mixer preset disk near apertures 7 recesses 24 mutually offset 90 on the periphery, into which recesses the spring locking catch 20, shown at bottom right of FIG. 3, engages dependent upon the four possible prescribed positions of the mixer preset disk. By means of the supports 21 extending over the entire depth'of the mixer preset disk in conjunction with partition 4" subdividing chamber 4 into two subchambers, the impeller 6 subject to the rotated position of the mixer preset disk is made to convey either the hot boiling water arriving through mixer connection KV or else the water returning from the heating elements to the mixer connection I-IR, toward the mixer connection HV. It is also essential in this respect that the subspace occupied by impeller 6 should be kept directly coupled with mixer connection HV. Through its covering of the aperture 7' of the mixer preset disk 7 which lies opposite this mixer connection, the casing section 4 extending back over the mixer preset disk in the neighborhood of the mixer connection I-IV provides for an optimum delivery of the impeller 6.

The process of one operation of the mixer preset disk 7 moving through a 90 rotation may be briefly explained with the help of FIG. 2. The changeover of the mixer valve is introduced by an electric pulse conveyed to the control input of the electromagnetic control and by which the electromagnetic control responds and causes the eccentric plate 17 to make a momentary clockwise rotation. The stud 13 thus is pushed axially leftward against the power of the coil spring 14 and at the same time the spring lock catch 20 is lifted momentarily over the unlocking linkage. The movement of stud 13 brings the carrier disk into engagement with the mixer preset disk 7, which is thus caused to rotate in the same direction as the driving shaft. The control impulse at the control input of the control is of such short duration that the eccentric plate 17 returns to its normal position before the mixer preset disk 7 has executed its 90 rotation. On reaching this position the preset disk is therefore locked in position again by the closing of the spring locking catch 20 into recess 24 which marks this setting in the outer wall of the mixer preset disk.

In the diagrammatic drawing of the embodiment shown in FIG. 4 the circulating-pump casing is a closed hollow cylinder with the driving motor mounted on its top face in such a way that the axis of its driving shaft 103 lies along the axis of symmetry of the casing. Four mixer connections I to IV are provided on the periphery of casing 101, the mixer connection III lying beyond them and being visible only in the plan view of FIG. 5. Mixer connection I discharges on the bottom of the casing into the suction port of impeller 104, but for reasons of symmetry it is, as shown in FIG. 5, raised up forward into the plane of the mixer connections II to IV. The mixer preset disk is mounted inside the casing and consists of a hollow-tubular member 105 with contiguous sliding blades 106 on opposite sides thereof extending to the wall of casing 101, which is only incompletely shown in FIG. 4 because of their obliquity to the drawing plane. The impeller 104 is mounted inside the hollowtubular member 105 and on its base. The impeller is surrounded peripherally by an upward winding helical guide channel 107, which opposite to the impeller 104, is firmly joined tothe hollow-tubular member 105. The helical guide channel 107 opens into a longitudinal slot arranged in the wall of the hollow-tubular member 105 and through which the liquid raised by the impeller flows tangentially from the hollow-tubular member and strikes the opposite wall of the casing at an oblique angle. The hollow-tubular member 105, which like the casing 101 is enclosed down to the aperture on the bottom for mixer connection I, is freely pivoted on the driving shaft 103 on one side in bearing 108 on the driving motor side and on the other side in bearing 109 beside the impeller. A front cover plate 110 of the hollow-tubular member 105 on the driving motor side 102 has its diameter matching the inside diameter of casing 101 and is united in the outer zone with a drop-pin 111 of an unlatching device 112. In practice, the unlocking device consists of an electromagnet whose liftable armature is the drop-pin 1 11. When the unlocking device 112 is in its rest position, the drop-pin 111 is pressed through an aperture 114 in the front wall of casing 101 by pressure of a spring 113 toward the surface of cover plate 110. As the plan AB indicated in FIG. 4 and shown in FIG. 5 demonstrates, the drop-pin 111 snaps into specified recesses 115 in the top of cover plate 1 10, and locks the mixer preset disk in the normal setting given by such catch point, which mixer preset disk would tend to turn clockwise through the reaction of the liquid indicated by a double arrow flowing radially from the hollow-tubular member. The recesses 11S representing the catch positions lie on a concentric circle, which is constructed as a trough-line guide 115 for the better functioning of the drop-pin 1 ll of the unlocking device 112.

The mixer connection I, fixedly attached to the induction side of impeller 104 and independent of the rotational position of the mixer preset disk, is, as already noted, laterally raised from the bottom and has its outer connection in the same plane as the remaining mixer connections II to IV. The direction of the flow of liquid for mixer connection I is indicated by an arrow. The liquid as in the case of mixer connection I, indicated in the first place by a circle with an inserted X, is conveyed downward to the suction port of impeller 104, then carried upward through the helical guide channel as indicated by the innermost circle with the dot representing the point of the arrow, and then leaves the hollow-tubular member tangentially as shown by the outline arrow. In the indicated position of the mixer preset disk, the liquid reaching mixer connection I is therefore conveyed away to mixer connection IV, which here again is shown by an arrow. The mixer connections II and III are at the same time connected together.

Various alternative settings expressing the diversity of possible applications of the object of this invention, including a modification of the mixer preset disk with respect to the arrangement of its sliding blades, are illustrated for greater clarity in FIGS. 6 to 10 by means of views corresponding to FIG. 5. In the first alternative in FIG. 6 for a four-way mixer valve, the corresponding portion is the left part of FIG. 5. Assuming that mixer connection I represents a heating reflux, mixer connection II a boiler return, mixer connection III a boiler feed and mixer connection IV a heating feed, then in the position of the mixer preset disk in the left-hand portion of FIG. 6, the water coming from the heating reflux is pumped directly into the heating feed, while the boiler is disconnected from the heating circulation. After a momentary lifting of drop-pin 111 by means of an electric pulse, the mixer preset disk is rotated clockwise through by the hydromechanical coupling and thereupon relocked in position. By this time the pump is driving the water from the heating reflux into the boiler return. From the boiler feed the water is then led through the mixer valve to the heating feed. At this point the drop-pin is again lifted instantaneously by means of an incoming electric pulse and the catch is thereby released, whereupon the mixer preset disk, in the absence of any further stop positions, rotates clockwise through 270 until it is again locked in the stop position corresponding to the left portion of FIG. 5. i

The same result can be obtained with two recesses angularly distanced at l80 on a concentric circle and representing points of arrest, if as shown in FIG. 7 both of the slider blades are arranged with an angle of approximately between them on the hollow-tubular member. In the mixer preset disk position shown on the left, the pump is driving from mixer connection I to mixer connection IV with simultaneous connection of the mixer connections II and III. In the right-hand sketch of FIG. 7, where the mixer preset disk has rotated through l80, the pump is driving from mixer connection I to mixer connection 11 and for the heating plant assumed in FIG. 6, the result is the flow of the pumped heating water in the direction indicated by the arrows at the four mixer connections.

In the first cycling for a three-way mixer valve shown in FIG. 8, mixer connection III is shut. Recesses l 15 representing four stop positions are arranged on a concentric circle and spaced apart by 90. The left portion of FIG. 8 indicates when the water arriving at mixer connection I is driven to mixer connection II while mixer connection IV lies idle. After one 90 rotation to the next stop position, the water coming in at mixer connectionl is conveyed to mixer connection IV and mixer connection II is idled. At the next stop in the direction of rotation of the mixer preset disk, regardless of the location of the water issuing from the hollow-tubular member, the mixer is again in the position corresponding to the left side of FIG. 8.

In the second cycling for a three-way valve shown in FIG. 9, the mixer connection II is shut off. As the three sketches in FIG. 9 show, three recesses 115 representing stop positions are provided spaced apart by 90 intervals. In the top central portion of FIG. 9, the water from the mixer connection I is carried to mixer connection IV. Mixer connection 111 is set idle. When an unlocking pulse is received, the mixer preset disk rotates clockwise through 180 to the next stop, the position of the mixer preset disk at this point being shown in the bottom left-hand sketch of FIG. 9. By now, the pump is driving the water input at mixer connection I on to mixer connection I", while mixer connection IV lies idle. After a further clockwise rotation of the mixer preset disk through 90 to the next stop, a mixer position results wherein the incoming water at mixer connection I is driven to both mixer connection III as well as mixer connection IV. The same operation occurs when mixer connection IV is shut off instead of mixer connection II.

In the further cycling alternative according to FIG. for a three-way mixer valve, the start corresponds to that of the example in FIG. 7, with both slider blades being fastened to the hollow-tubular member with an angle of approximately 120 between them. In the FIG. 10 example, connection III is closed. In the top middle portion of FIG. 10, in the available stop position of the mixer preset disk, the water is driven from mixer connection I to mixer connection IV while the mixer connection II sits idle. After a momentary raising of the stop, the mixer preset disk rotates clockwise 180 to its next halt. The mixer preset disk position now occupied is shown in the left bottom portion of FIG. 10. Here the water from mixer connection I is driven to mixer connection II while mixer connection IV sits idle. After a further clockwise rotation of 90, shown in the bottom right portion of FIG. 10, the water from mixer connection I is carried toward the two'mixer connections II and IV.

As can be gathered from FIG. 6 to 10, it is possible for example to use the cycles of FIG. 6, 8 and 9 on the one hand as well as of FIG. 7 and 10 on the other hand for a single mixer valve model, wherein the recesses 115 on the top of cover plate 110 according to FIG. 4 and 5 which represent stops pertaining to the individual cycles, are in each case arranged on mutually concentric circles. The choice of a particular cycle can be provided by simple radial shifting of the unlocking device with its drop-pin.

In the construction of the casing and of the cover plate of the hollow-tubular section a nonmagnetic material, brass or plastic for example, is used, while the unlocking device can also be dimensioned for a purely magnetic locking. For this it is only necessary to provide inset fillets of magnetic material in the top surface of the cover plate in place of the drop pin recesses, and an electromagnet reaching down to the top face of the cover plate. The stop is then maintained as long as the electromagnet is excited. The mode of operation of the unlocking device occurs in this case, in other words, according to the so-called closed-circuit current principle.

In the further embodiment of the invention diagrammatically drawn out in FIG. 11, use is again made of a cylindrical casing 101 with mixer connections I to IV distributed around its periphery, inside which casing the mixer preset disk and pump impeller 104 are arranged one behind the other. A mixer preset disk 105 is also again mounted freely pivoted on the driving shaft 103 of the end-fitted driving motor 102 and is provided with a second small impeller 117 with its open face facing impeller 104, through which impeller 117 the required hydromechanical coupling between the liquid driven by impeller 104 and the mixer preset disk is achieved. Between the impeller 104 and the mixer preset disk 105' a further partition 116 is provided covering about two-thirds of the sectional area of easing l and covering the drift space of the impeller 104 partially toward the subspace occupied by the mixer preset disk 105.

As set forth above, the novel principle of this invention is that with an arrangement of the circulating pump and mixer valve being integrated into one constructional unit or housing, the pump drive can utilize simple means for the regulation of the mixer preset disk for fully automating its control.

Using this invention in hot-water heating installations allows for quick-acting regulation which makes quasi-constant temperature operation possible, as the fluctuations of the heating water temperature relative to the ideal temperature value resulting from the regulation can be kept to negligible values through the operation of the unlocking device and preset mixer disk. v

This simple adjustability corresponds substantially to the continuous mixer valve controls of known type. My quick-acting regulation has the advantage over a continuous mixer control that in each of the specified possible mixer positions, the pump delivery is full with an insured adequate intermixture. In single-duct heating installations, demanding a comparatively high pump delivery, a special importance attaches to this advantage. The intermixture occurs due to slot-shaped connections between the valve chambers combined with the variable compression ratios found in the individual valve cavities, which ratios have been set by the circulating pump. [nthe first embodiment of the invention described above, the mixer preset disk mounted rotatably in a side-wall guideway has a concentric, interior-tapered, continuous aperture into which a carrier disk, mounted on the impeller driving shaft'and slidable along its axis, having a tapered cross section conforming to the tapered aperture of the mixer preset disk, extends freely rotatable in a normal operating position.

For coupling up the mixer preset disk with the steadily rotating impeller driving shaft, the driving shaft 3 can in part be hollow. In this case stud 13 shiftable axially against the force of a spring is mounted in the opening of the hollow shaft and connected rigidly throughout with the tapered carrier diskset up on the driving shaft by at least one axial selector shaft guide.

For the actuation of the stud to synchronize the mixer preset disk by the carrier disk, the axially displaceable stud is connected near one of its ends with linkage 16 which in its turn can be actuated by an electromagnetic control arrangement to synchronize the mixer preset disk by the carrier disk.

The releasable stop device by which the mixer preset disk is to be fixed in its various positions comprises the spring lock catch 20 connected with the electromagnetic control arrangement through unlocking linkage 19.

The second alternative according to the invention is characterized by having a minimum of parts exposed to wear and tear.

In development of this second embodiment of the invention two or more groups of specific stop positions are provided for the mixer preset disk and the unlocking device is formed as a programmed selection device for selecting one of the stop position groups. Through such programmed selection it is possible ,to incorporate the object of the invention into a most varied range of installations selectively without changes in design, since with the help of the various groups of stop posi-' tions, a circulating pump with four-way mixer valve, for-example, can also be introduced as a circulating pump withthreeway mixer valve specifically for the performance of various mixing processes.

In one arrangement shown in FIG. 11 where the impeller and the mixer preset disk are mounted one behind the other in the casing, the hydromechanical coupling can be simply produced by the mixer preset disk carrying on the impeller side the carrier device formed by the small second impeller 1 17 taking the place of a hydromechanical resistance.

In one preferred embodiment ofthis invention as described above in FIGS. 4 and 5, the mixer preset disk is a hollow-tubular member. In this case the impeller on its suction side, independently of the setting of the mixer preset disk, is in continual connection with one mixer connection. Further, the impeller together with a helical guide channel on the blower end sits inside the hollow-tubular member.

Advantageously utilized with the above preferred embodiment is where the hollow-tubular member is provided on its periphery with the radially extending slider vanes 106 which divide the annular space remaining between the hollow-tubular member and the case into two or more subspaces. The helical guide channel in this case is positively united with the hol low-tubular member and empties at an angle divergent from the normal into an opening in the wall of the hollow-tubular member, through which the conveyed liquid strikes obliquely throughout onto the opposite casing wall.

The reaction which effects the drive of the mixer preset disk and is due to the liquid jet impinging obliquely on the casing wall then reaches optimum values when the angle, at which the liquid raised flows from the hollow-tubular member, differs by at least approximately 90 from the normal.

The aperture in the shell of the hollow-tubular member is the described slot extending in the axial direction of that member.

The rotational movement of the hollow-tubular member is assisted by its being freely pivoted at its two ends on the impeller drive shaft, since in this way the bearing

surfaces

108 and 109 can be kept particularly small.

To obtain as simple an arrangement as possible, it is advisable to confine the helical guide channel 107 to a single turn.

In other respects, it is preferable to make the cross-sectional area of the channel 107 uniform over the whole length, to have as much pump pressure available as possible at the outlet of the helical guide channel.

A specially simple and neat construction of the unlocking device is obtained when the hollow-tubular member has on its end, facing the drive motor, the cover plate 110 of diameter fitting or matching the inside diameter of the casing and provided on top with recesses 115 representing stopping points arranged round a concentric circle, into which recesses the drop-pin 111 of unlocking device 112 is forced through the casing by spring pressure.

For the implementation of two or more mixing cycles, as described above, the cover plate can have two or more groups of stops arranged around concentric circles in the outer zone of its surface. The unlocking device with its drop-pin then merely needs to be fastened slidably in the radial direction on the casing.

The accuracy of engagement of the drop-pin with the stop point inthe course of a revolution of the mixer preset disk can then quite simply be increased by each concentric circle on the surface of the cover plate arranged for an individual group of stop points being designed as a guide groove for the droppm.

It will thus be seen that the objects set forth above, among those made apparent from the preceding description, are efficiently attained and, since certain changes may be made in the above apparatus without departing from the scope of the invention, it is intended that all matter contained in the above description and shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

What I claim is:

1. Apparatus for hot-water and heating installations comprising a pump casing having a periphery, a circulating pump housed within said pump casing, a mixer preset disk capable of rotating, a pump impeller arranged concentrically relative to said mixer disk in said casing, said impeller being located with a hollow section of said casing, a plurality of mixer connections attached to said periphery of said casing, said hollow section being directly connected with one of said plurality of mixer connections independently of the position of rotation of said mixer disk, said hollow section being connected across said mixer disk with any of the other of said plurality of mixer connections which are adjacent to the mixer connection directly connected to said hollow section, stop means, a remotely-controllable carn'er means coupling said stop means to said impeller, said mixer preset disk being locked in preset positions of rotation by said stop means.

2. Apparatus as claimed in claim 1, comprising an aperture inwardly tapered being concentric with said mixer preset disk, a driving shaft for said impeller, a carrier disk mounted on said driving shaft, said driving shaft and said carrier disk having the same axis of rotation as said mixer preset disk, said carrier disk being slidable along said axis of rotation and being shaped to conform to said aperture.

3. Apparatus as claimed in claim 2, wherein said driving shaft is hollow for at least a portion of its length, a spring, a stud axially shiftable against said spring being mounted in the interior of said hollow portion, an axial selector shaft guide within said driving shaft, said stud being rigidly connected with said carrier disk mounted on the driving shaft by at least said axial selector shaft guide.

4. Apparatus as claimed in claim 3, wherein the axially shiftable stud has two ends, a linkage, an electromagnetic control, one of said two ends being connected with said linkage which is actuated through said carrier disk by said electromagnet control in the same direction as the mixer preset disk.

5. Apparatus as claimed in claim 4, including an unlocking linkage wherein said stop means device for the mixer preset disk comprises a spring locking catch which is connected with the electromagnetic control through said unlocking linkage.

6. Apparatus for hot-water and heating installations comprising a pump casing having a periphery, a circulating pump housed within said casing, a mixer preset disk capable of rotating, a pump impeller arranged concentrically with respect to said mixer preset disk, a plurality of mixer connections attached to said periphery of said casing, a hydromechanical coupling for turning said mixer preset disk through one revolution being mounted between the liquid carried by said impeller and said mixer preset disk, a remotely controlled unlocking device for stopping the turning of said mixer preset disk at predetermined positions.

7. Apparatus as claimed in claim 6, wherein at least two groups of prescribed stop positions are provided for the mixer preset disk and the unlocking device is controllable by one of such groups of stop positions in accordance with a cycle selection.

8. Apparatus as claimed in claim 7, wherein the mixer preset disk is a hollow-tubular member having a blower side and wherein said impeller is provided with a suction end and connected at said suction end, independently of the rotated position of the mixer preset disk with one of said plurality of said mixer connections, a helical guide channel, and the impeller together with said helical guide channel on the blower side are located in the interior of the hollow-tubular member.

9. Apparatus as claimed in claim 8, wherein the hollow-tubular member includes a periphery and a wall and is provided with radially extending slide blades on said periphery, said blades subdividing the annular space between the hollow-tubular member and the casing into at least two subspaces, said helical guide channel being positively connected with the ho]- low-tubular member and emptying at an angledivergent from the normal into an opening in the wall of the hollow-tubular member, the conveyed liquid thereby obliquely striking onto the opposite casing wall.

10. Apparatus as claimed in claim 9, wherein the angle divergent from the normal is at least approximately 11. Apparatus as claimed in claim 9, wherein the opening in the wall of the hollow-tubular member is a slot extending parallel to the axis of the hollow-tubular member.

12. Apparatus as claimed in claim 1 1, wherein both ends of the hollow-tubular member are freely pivoted on the driving shaft.

13. Apparatus as claimed in claim 8, wherein the helical guide channel has a uniform cross sectional area throughout its length.

14. Apparatus as claimed in claim 8, including a cover plate attached to one end of said hollow-tubular member having a diameter matching the inside diameter of said casing and being provided on one side of said plate with recesses arranged in a concentric circle representing said predetermined stop positions, said unlocking device including a drop-pin, a spring acting against said drop-pin through said casing, said pin adapted to fit into said recesses to fix said mixer preset disk at a predetermined position.

15. Apparatus as claimed in claim 14, wherein the cover plate includes at least two groups of stops arranged in concentric circles in the outer portion of the side of the plate, and wherein the unlocking device is fastened to the casing by said drop-pin slidable in the radial direction.

16. Apparatus as claimed in claim 15, wherein each concentric circle provided with a group of stopping points on the side preset disk.

18. Apparatus as claimed in claim 17, wherein said hydromechanical resistance is formed by a second smaller impeller.

Claims

1. Apparatus for hot-water and heating installations comprising a pump casing having a periphery, a circulating pump housed within said pump casing, a mixer preset disk capable of rotating, a pump impeller arranged concentrically relative to said mixer disk in said casing, said impeller being located with a hollow section of said casing, a plurality of mixer connections attached to said periphery of said casing, said hollow section being directly connected with one of said plurality of mixer connections independently of the position of rotation of said mixer disk, said hollow section being connected across said mixer disk with any of the other of said plurality of mixer connections which are adjacent to the mixer connection directly connected to said hollow section, stop means, a remotely-controllable carrier means coupling said stop means to said impeller, said mixer preset disk being locked in preset positions of rotation by said stop means.

9. Apparatus as claimed in claim 8, wherein the hollow-tubular member includes a periphery and a wall and is provided with radially extending slide blades on said periphery, said blades subdividing the annular space between the hollow-tubular member and the casing into at least two subspaces, said helical guide channel being positively connected with the hollow-tubular member and emptying at an angle divergent from the normal into an opening in the wall of the hollow-tubular member, the conveyed liquid thereby obliquely striking onto the opposite casing wall.

10. Apparatus as claimed in claim 9, wherein the angle divergent from the normal is at least approximately 90*.

11. Apparatus as claimed in claim 9, wherein the opening in the wall of the hollow-tubular member is a slot extending parallel to the axis of the hollow-tubular member.

12. Apparatus as claimed in claim 11, wherein both ends of the hollow-tubular member are freely pivoted on the driving shaft.

16. Apparatus as claimed in claim 15, wherein each concentric circle provided with a group of stopping points on the side of the cover plate is machined as a trough-line guide for said drop-pin.

17. Apparatus as claimed in claim 6, wherein said impeller and the mixer preset disk are arranged one behind the other inside said casing and the mixer preset disk includes a hydromechanical resistance on the impeller side of said mixer preset disk.