EP3012552B1 - Component for a compact heating system - Google Patents

Description

The invention relates to a structural unit for a compact heating system with the features specified in the preamble of claim 1.

Such units for compact heating systems count in a variety of construction versions of the prior art. Nowadays, such assemblies constructed of plastic injection molded parts are used to construct a compact heating system in a cost-effective and space-saving manner. Such compact heating systems typically have two heating circuits, one for space heating and one for domestic water heating, which are supplied by a common primary heat exchanger with heat. The recirculated heat transfer medium is conveyed on the suction or pressure side by a circulation pump, wherein the heating circuit for the space heating is constantly connected and is reversed only for service water extraction of the heating circuit.

Here, it is part of the prior art to use an electric motor-driven changeover valve, which has a pivot lever, at one end of a shut-off is arranged, which projects into the interior of the unit and the one or the other heating circuit shuts off or opens, and at the other end a drive for actuating the pivot lever attacks. The drive is typically an electric motor with downstream spindle gear, which converts the rotational movement of the motor into a linear movement, which moves the outwardly projecting end of the pivot lever accordingly and in this way controls the valve. Such a unit is for example off EP 2 397 777 A1 known.

The electromotive valve control has proven itself in practice, as in the case of a defect, be it the engine or the transmission, the drive unit can be replaced as a whole, without replacing the components that must be sealed against the heat transfer medium.

A certain disadvantage, however, is that to replace the drive unit a relatively large space must remain within the unit or can not be used elsewhere within the heating system to allow this exchange. After releasing a securing bracket, the drive unit can be removed only in the axial direction of the motor or the direction of movement of the linear drive. Although in principle a disassembly in the transverse direction is possible together with the pivoting lever, but this requires an opening of the assembly, which is connected due to the then emerging heat transfer medium with a very high cost and only takes place if there is a defect in the valve.

Such a unit is also off EP 1 217 310 A1 known. In this, the drive, that is, the electric motor can be pulled out with downstream spindle gear in the installed position to the front, either to exchange the drive motor or to better reach the underlying components can. For this purpose, the spindle gear is mounted in a receiving clamp.

A disadvantage of this arrangement is that a large space for replacing the drive unit is required and that when replacing the drive unit, this not only from the receiving clamp to remove, but also the locking connection between the spindle end and lever to solve or restore is.

Based on this prior art, the present invention seeks to construct a generic unit so that on the one hand the drive for operating the pivot lever can be quickly and easily assembled and disassembled, on the other hand, this as compact as possible and free space in the unit or in the compact heating system can be integrated.

This object is achieved according to the invention by a structural unit having the features specified in claim 1. Advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the drawings. Here, the in the subclaims and features specified in the description in each case but in a suitable combination, the inventive solution according to claim 1 further.

The assembly according to the invention is intended for a compact heating system with two acted upon by a common circulation pump heating circuits and has a switching valve for integrating the one and / or the other heating circuit in a delivery circuit of a circulating pump having a pivot lever, at one end of a shut-off and on whose other end a drive for actuating the pivot lever attacks. According to the invention, the drive in the assembly on an operating position for the intended operation. In addition, a mounting position in the unit is provided for the drive, in which the drive, or at least a part thereof, in the assembly and is removable.

The basic idea of the solution according to the invention is to provide two positions for the drive, namely an operating position in which the drive is typically arranged snugly against the unit and space-saving and a mounting position in which the drive is particularly well accessible from the outside, so this quickly and easy to install and remove. The solution according to the invention thus combines the properties which are in themselves exclusive, namely a compactness of the structural unit with built-in drive, which is greater than the prior art, and good accessibility and interchangeability of the drive.

According to one embodiment of the invention, it is particularly advantageous if the drive between the operating position and the mounting position is pivotally mounted within the unit, so quasi folded in the operating position of the unit and folded in the mounting position of this, so that they are easily accessible on the one hand . that is tangible, and on the other hand pivoted in a range in which typically the required space for installation and removal of the drive is present.

Thus, the drive is advantageous in the operating position close to the building unit and arranged in the assembly position at least partially baueinheitsfernfern. It can be almost completely used in the operating position of the space around the drive, only in the mounting position, a corresponding space is provided.

Advantageously, the drive is designed as a linear drive, that is, that it performs a linear movement, which can be used to control the pivot lever. Such a linear drive is advantageously formed by a motor-gear unit which is coupled to an axially movable control, which is acted on the one hand by the motor-gear unit and which on the other hand is coupled to the pivot lever and which is spring-loaded in the device , Such an arrangement is particularly advantageous, since in this case the linear drive only has to be effective in one direction, ie an electric motor rotating only in one direction can be used. In the transmission, the rotational movement of the motor is converted into a linear movement, for example, in which a reduction gear is provided, at the end of a control disk is arranged, for example, has a sinusoidal or other suitable curve, which moves the control accordingly axially more or less. The return movement is advantageously done by spring force. The control itself is motion-coupled at its end facing away from the motor-gear unit end with the pivot lever.

Advantageously, the control can be formed by a plunger, which is mounted axially movable in a guide member, which is pivotally mounted on the unit. About this guide component on the one hand, the plunger is mounted, on the other hand, the motor-gear unit is supported within the unit and mounted pivotally.

Advantageously, the guide member on an abutment for a spring element, which acts on the push rod to the motor gear unit towards force, so as to ensure the return movement of the plunger to the motor gear unit out. The required spring force and the required spring travel can be generated by one or more suitable spring elements, such as leaf springs, coil springs, elastomer elements or the like. In order to be able to receive the spring forces safely, it is advantageous for the guide component to be supported and held in a form-fitting manner in the structural unit at least in the axial movement directions of the tappet, but advantageously also in other directions.

The spring force can be applied by suitable spring elements, particularly advantageous for this purpose is a helical spring use, which is supported on the one hand in the guide member and on the other hand on the plunger and surrounds the plunger.

For this purpose, it is expedient to form the guide member pot-shaped, to provide a central opening in the bottom of the plunger, to which a follower surrounding the plunger guide connects starting from the ground, the peripheral wall has two diametrically arranged on the outside projections which open in one side recesses the assembly are received, in which the guide member is supported and pivotally mounted. With such a construction, both the required abutment and the required for pivoting from the operating position to the mounting position and vice versa pivot bearing is realized. The openings are in the recesses arranged so that they lie in an unloaded direction, so that the projections can be passed at least in a pivoting position.

To ensure that the assembly on the one hand quickly and easily from the mounting in the operating position and vice versa pivotally, on the other hand, however, the motor-gear unit remains in operation in the operating position, it is advantageous to provide the guide member positive locking or locking means to here to keep the guide member in the operating position. These form-locking or locking means are advantageously manually controllable, so that after triggering e.g. a spring-biased lever or after overcoming a force of a latch, the pivoting from the operating position can be made in the mounting position. Advantageously, in the reverse position, an automatic locking or latching, so that by simply folding the engine-gearbox unit not only transferred to its operating position, but is also fixed in this.

For receiving the motor gear unit, the unit advantageously has an outwardly open and in cross-section U-shaped wall portion, which in the Schenkelwandungen each having a recess open on one side for receiving and supporting the guide member, and at one end of the motor gear unit is supported. Advantageously, the form-fitting or locking means are provided in this area.

The assembly according to the invention can be used in principle suction or pressure side, it is particularly advantageous if it is arranged on the suction side and forms at least part of a pump housing in the suction chamber lines open, which are shut off or released by the shut-off depending on the position of the pivot lever.

Fig. 1

in stark vereinfachter perspektivischer Darstellung eine Baueinheit gemäß der Erfindung mit dem Antrieb in Betriebsstellung,

Fig. 2

die Baueinheit nach Fig. 1 in Montagestellung,

Fig. 3

eine Ansicht der Baueinheit nach Fig. 1 in Betriebsstellung,

Fig. 4

eine Ansicht der Baueinheit entsprechend Fig. 3 in Montagestellung,

Fig. 5

eine Ansicht der Baueinheit entsprechend Fig. 3 beim Demontieren des Antriebs,

Fig. 6

den antriebsseitigen Teil des Umschaltventils der Baueinheit in Längsschnittdarstellung mit abgenommen Antrieb,

Fig. 7

in perspektivischer Darstellung das den Schwenkhebel aufnehmenden Bauteil der Baueinheit,

Fig. 8

eine Ansicht des Bauteils nach Fig. 7 von vorne,

Fig. 9

eine Seitenansicht des Bauteils nach Fig. 7,

Fig. 10

einen Schnitt längs der Schnittlinie A-A in Fig. 8,

Fig. 11

einen Schnitt längs der Schnittlinie B-B in Fig. 8 und

Fig. 12

eine perspektivische Ansicht der Baueinheit mit montierten weiteren Bauteilen.

The invention is explained in more detail with reference to an embodiment shown in the drawing. Show it:

Fig. 1

in a greatly simplified perspective view of a structural unit according to the invention with the drive in the operating position,

Fig. 2

the assembly after Fig. 1 in assembly position,

Fig. 3

a view of the unit after Fig. 1 in operating position,

Fig. 4

a view of the assembly accordingly Fig. 3 in assembly position,

Fig. 5

a view of the assembly accordingly Fig. 3 when disassembling the drive,

Fig. 6

the drive-side part of the switching valve of the assembly in longitudinal section with removed drive,

Fig. 7

in a perspective view of the pivot lever receiving component of the assembly,

Fig. 8

a view of the component after Fig. 7 from the front,

Fig. 9

a side view of the component after Fig. 7 .

Fig. 10

a section along the section line AA in Fig. 8 .

Fig. 11

a section along the section line BB in Fig. 8 and

Fig. 12

a perspective view of the assembly with mounted other components.

The structural unit 1 shown in the figures has an injection-molded component, which forms a pump housing for a heating-circulation pump 2 and a change-over valve 3, comparable to that of FIG EP 2 397 777 A1 known housing unit. The switching valve 3 is formed in a conventional manner and therefore not described here in detail, it is referred in this respect to the aforementioned document.

The switching valve 3 has a pivot lever 4, which is pivotally mounted within a housing component 5, which is sealingly incorporated by incorporation of a sealing body 6 of the valve 3 receiving sleeve 7 in a recess within the assembly 1. The sealing body 6 forms the shut-off of the valve 3, he sits at the end of the pivot lever 4, within the assembly 1 and closes depending on the pivot position of the lever one or the other valve stub within the assembly 1, in a middle position are both open. The other end of the lever 4 is fork-shaped and marked 8. At this free end of the lever 8, a plunger 9 by means of a provided at the end of the plunger 9 forceps-like coupling 10 is limited movable coupled.

The plunger 9 is mounted axially movable in a guide member 11 which is cup-shaped and has a central opening for the plunger 9, to which a plunger 9 surrounding guide 12 connects starting from the ground. The likewise rising from the bottom of the guide member 11 circumferential wall 13 has two offset by 180 ° to each other outer sides projections 14 in the associated one-sided open recesses 15 in the leg walls of a U-shaped wall section of the housing part 5 are provided. The projections 14 are pin-like, the recesses 15 in its closed area circular, so that the guide member 11 with the therein and axially limited movably guided plunger 9 pivotally mounted within the housing member 5, which is fixedly connected to the remaining part of the assembly 1 is. This is the pivot axis, how Fig. 10 illustrated, with a small distance next to the longitudinal and movement axis 16 of the plunger 9. The clutch 10 is designed so that the pivot lever 4 does not hinder the pivotal movement of the guide member 11, as in particular Fig. 6 is apparent.

The guide 12, which guides the plunger 9 on its inner side, carries with its outer side a helical spring 17, which is supported on the bottom of the cup-shaped guide member 11 and is guided outwardly through the peripheral wall 13. At the other end, the coil spring 17 abuts against a disc 18, which is held in a form-fitting manner within a groove of the plunger 9, so that when the plunger 9 is moved in the direction of the lever end 8, the helical spring 17 is tensioned and the movement is carried out in the opposite direction with spring force support.

The free end of the plunger 9 is cylindrical and provided for receiving in a drive 19, which receives this plunger end 9. The drive 19 consists of an electric motor 20 with connected reduction gear 21 and is one of the prior art. It can be used here, for example, a drive from Bitron HVAC Systems Italy Type 3160 (3 Way Valve Motor), in which the rotational movement of the electric motor 20 via the gear 21 in a movement of the plunger 9 in the axial direction 16, namely alternately in the direction to the lever end 8 and in the opposite direction, is generated. Within the reduction gear 21, the plunger end is guided axially movable. The drive 19 itself is positively connected in the housing component via a groove 22 in the transmission housing 5 in the axial direction 5, which has a transverse wall 23. In the transverse wall 23 a recess open on one side is provided, in which the reduction gear 21 engages with its groove 22. The movement coupling of the plunger 9 via the spring 17, which ensures that the free plunger end rests against the corresponding drive end within the reduction gear 21 and thus is moved in the direction of the lever end 8 by engine power and in the opposite direction by spring force.

In an operating position ( Fig. 1 respectively. Fig. 3 ) is the drive 19 positively with the groove 22 of the reduction gear 21 in the transverse wall 23 of the housing member 5 and is thus in the axial direction, that is supported in the directions of movement 16 of the plunger 9. The plunger 9 itself is within the guide member 11, which is also supported in the housing member 5 via the projections 14 in the recesses 15, so that a movement control of the plunger 9 can be made by the motor.

In order to prevent the drive 19 from accidentally loosening from the operating position in the housing component 5, a latching projection 24 is provided on the circumferential wall 13 on the outside, namely on the side facing the web portion of the housing component 5, which in a recess 25 in the web wall of the housing member 5 engages detent and this interspersed. To release the drive 19 from this operating position of the exiting on the back of the housing member 5 locking projection 24 is pressed down, after which the drive 19 is pivoted together with the plunger 9 and the guide member 11, as shown in the Figures 2 and 4 is shown. This swung-out position, in which the groove 22 is disengaged from the transverse wall 23, is the assembly position in which the drive 19 can be removed by simply pulling it off the plunger 9 or placed on it. The mounting position differs in the embodiment approximately 30 ° from the operating position. This can also be designed differently depending on space, the pivot angle is limited by the connection between the clutch 10 and the lever end 8 and by the movement of the pivot lever 4 itself. It may optionally be provided here a separate stop to prevent a excessive force is exerted on the clutch 10 and pivot lever 4.

As the Figures 3 - 5 clarify the drive 19 can be assembled and disassembled, without affecting the space located above the drive. In the operating position ( Fig. 1 and 3 ), the drive 19 is arranged close to the unit, in the assembly position ( Fig. 2 and 4 ) the drive 19 is remote from the unit and easily accessible.

LIST OF REFERENCE NUMBERS

1

- assembly

2

- Circulation pump

3

- Changeover valve

4

- Swing lever

5

- Housing component

6

- sealing body

7

- cuff

8th

- free end of the lever 4

9

- pestle

10

- coupling

11

- Guide component

12

- Leadership

13

- circumferential wall

14

- Projections on the circumferential wall

15

- recesses

16

- Longitudinal and movement axis of the plunger

17

- coil spring

18

- Disc

19

- Drive

20

- electric motor

21

- reduction gear

22

- groove

23

- Transverse wall of the housing component

24

- locking projection

25

- Recess in the housing component

Claims (13)

1. A construction unit for a compact heating installation with two heating circuits which can be affected by a common circulation pump (2), with a switch-over valve (3) for incorporating the one or the other heating circuit into a delivery circuit of the circulation pump (2), wherein the switch-over valve (3) comprises a pivot lever (4), at whose one end a shut-off body (6) and at whose other end (8) a drive (19) for actuating the pivot lever (4) engages, wherein the drive (19) in the construction unit (1) has an operational position for the designated operation, characterised in that two positions are provided in the construction unit (1), the operational position and one assembly position for the drive (19), in which the drive (19) or at least a part thereof can be installed into the construction unit (1) and removed from it.
2. A construction unit according to claim 1, characterised in that the drive (19) is pivotably arranged between the operational position and assembly position, within the construction unit (1).
3. A construction unit according to claim 1 or 2, characterised in that the drive (19) in the operational position is arranged close to the construction unit and in the assembly position is arranged at least partly remote from the construction unit.
4. A construction unit according to one of the preceding claims, characterised in that the drive (19) is a linear drive.
5. A construction unit according to one of the preceding claims, characterised in that the drive (19) comprises a motor-gear unit (20, 21) which is coupled to a cam element (9) which is axially movably guided and which on the one hand is affected by the motor-gear unit (20, 21) and on the other hand is coupled in movement to the pivot lever (4) and is impinged by spring force in one direction.
6. A construction unit according to claim 5, characterised in that the cam element is formed by a plunger (9) which is axially movably mounted in a guide component (11) which is pivotably mounted on the construction unit (1).
7. A construction unit according to claim 6, characterised in that the guide component (11) comprises an abutment for a spring element (17) impinging the plunger (9) with force towards the motor gear unit (20,21).
8. A construction unit according to claim 7, characterised in that the spring element comprises a helical spring (17) which preferably surrounds the plunger (9) and which on the one hand is supported in the guide component (11) and one the other hand on the plunger (9).
9. A construction unit according to one of the claims 6 to 8, characterised in that the guide component (11) is supported and held in the construction unit (1) with a positive fit at least in the axial movement directions (16) of the plunger (9).
10. A construction unit according to one of the claims 7 to 9, characterised in that the guide component (11) is designed in a pot-like manner, comprises a central opening in the base for the plunger (9), to which opening a guide (12) surrounding the plunger (9) connects in a manner departing from the base, the peripheral wall (13) of said base comprising two projections (14) which are arranged diametrically on the outer side and are received in recesses (15) of the construction unit (1), said recesses being open at one side and in which the guide component (11) is supported and pivotably mounted.
11. A construction unit according to one of the claims 6 to 10, characterised in that preferably manually controllable positive-fit means or detent means (24) which hold the guide component (11) in the operational position are provided on the guide component (11).
12. A construction unit according to one of the preceding claims 6 to 11, characterised in that the construction unit (1) comprises an outwardly open wall section (5) which is U-shaped in cross section and which in the limb walls in each case comprises a recess (15) which is open at one side, for receiving and mounting the guide component (11), and at whose one end (23) the motor-gear unit (20, 21) is supported.
13. A construction unit according to one of the preceding claims, characterised in that it forms at least part of a pump housing, into whose suction chamber conduits run out, said conduits being shut-off or released by the shut-off body (6) in dependence on the position of the pivot lever (4).

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