ES2697398T3 - Pump with a heating device - Google Patents

Abstract

Pump (11,311) for electrical devices that transport water, with a pump body (12,312) and a pump chamber (16,316) in it, where at least one central inlet (13,313) is provided in the longitudinal direction of the pump in the pump chamber and at least one outlet (14,314) of the pump chamber, where a heating device (22, 122, 222,322) is arranged in the pump chamber (16,316) as a limitation of the pump chamber in the radial direction, where the heater device has a support (24,124) as a kind of tube with a round cross section about a longitudinal axis, where the inlet (13,313) leads to a wheel or impeller (18) of the pump and where starting from the impeller radially out of this, the annular design pump chamber is configured to at least partially surround the impeller, where the pump chamber (16,316) extends in the axial direction of the impeller pump (18) to the outlet (14,314) out of the bomb camera a at one end of the pump chamber remote from the impeller, where the outlet leaves the end of the pump chamber, characterized by the fact that the support (24,124) protrudes above a plane perpendicular to the longitudinal axis in at least one end with a supernatant zone (28, 128, 228,328) and with an obstacle zone extends along this plane or below, where the supernatant zone (28, 128, 228,328) of the heating device (22, 122, 222,322 ) is arranged in the area of the pump chamber (16,316) near the outlet (14,314) or in front of the outlet in the direction of circulation.

Description

DESCRIPTION

Pump with a heating device

Field of application and state of the art

[0001] The invention relates to a pump, preferably impeller pump or radial pump, with a heating device.

It is known from EP 2150165 B1 that a radial pump or impeller pump with integrated heating is provided.

The heating device is contemporaneously tubular and forms a part of an outer wall of a pump chamber.

Heating means in the form of thick-film electrothermal conductors are provided on the outer side of the heating device.

On the inner side of the heater device the rotating water flows along its path out of the pump chamber to the outlet.

There is a strong pretension to be able to foresee here a thermal capacity as high as possible or to be able to reach the best possible heating of the pumped water.

From DE 102012 202065 B3 is known another impeller pump with integrated heating, whose heating elements are made as heater elements of thick layer.

Objective and solution

[0002] The object of the invention is to create a pump provided with a heating device, with which the problems of the state of the art can be avoided and it is particularly possible to make a heating device of daily use and with thermal capacity as high as possible , to be able to heat the best possible in the pumped or transport.

[0003] This task is achieved by a pump with the features of claim 1. Advantageous as well as preferred configurations of the invention are the subject of the other claims and are explained in more detail below.

It is envisaged that the heating device in a pump is provided with a pump body and pump chamber in this pump chamber, since the limitation of the pump chamber serves in the radial direction.

The heating device particularly forms a rotating outer wall of the pump chamber of the pump. For presenting the heating device a support as a kind of tube with a round cross section around a longitudinal axis of the heating device.

[0004] According to the invention, the supports on at least one end with a supernatant zone on a plane perpendicular to the longitudinal axis or the support in this perimeter zone are longer than in others.

In this supernatant zone the support, so to speak, is longer than usual.

In addition, the support has a shorter area or obstacle zone, with which it extends along this plane or even below this plane.

Accordingly, the obstacle zone can define the first length of the support along the longitudinal axis, particularly when the obstacle zone is longer or greater.

In the supernatant zone the support comprises, as it were, a zone or a distance and therefore is longer here.

[0005] In this way it is possible with the invention, that the heating device in some areas, in which it does not necessarily have to have a single and unitary length, can be formed longer.

Accordingly, they can be better adapted for example in a pump body or in a pump chamber. In addition, it is possible to achieve a kind of enlargement of the area of the heating device and therefore also of its thermal capacity.

This is further explained in more detail in the event.

[0006] In the embodiment of the invention, the support can have heights of different longitudinal axis mentioned in axial direction or different lengths.

In this case, it can be foreseen that it has exactly one supernatant zone and at least one obstacle zone, preferably also exactly one exact obstacle zone.

Essentially, it depends on whether the support or heater device alone simply protrudes in one area, i.e. the supernatant zone, is longer and otherwise.

[0007] In an advantageous embodiment of the invention, provision can be made for the other end of the support to be cut straight.

Advantageously, it is such a section parallel to the plane cited perpendicular to the longitudinal axis or extends itself perpendicular, because this is carried out on one side relatively easily.

On the other hand, an adaptation of the support or the heating device to a flat side of the pump chamber can therefore occur.

A cutting of the heating device or the support can be advantageously produced by laser.

[0008] The supernatant zone can be formed in such a way that the support at one end is cut obliquely easily.

This results in a level of cut, which can be at an angle of 5 ° to 45 ° to the longitudinal axis.

These may preferably be at an angle of 15 ° to 30 ° to the longitudinal axis.

Accordingly, the oblique section in the support is configured, so that a continuously increasing and therefore continuously decreasing supernatant zone is formed.

In the elaboration of the invention, the supernatant zone can be formed in such a way as a distant zone, which leaves a support cut just before strongly rising, forms a tip or a maximum supernatant and then descends again.

An ascent and descent in the supernatant zone can be in general totally symmetrical or non-symmetric. Thus the supernatant zone can descend slowly and after a maximum supernatant descend markedly and clearly pronounced.

In a further configuration of the invention, an end edge or cutting edge of the conveyor can continuously be continuously applied to the end with the supernatant zone.

Advantageously, it is provided that there are no obstacles or angles, so that both a manufacturing of the heating device and an adaptation is simple in a pump chamber.

In this case, the rise of the supernatant zone may be varied at least in part.

Alternatively, the end edge of the support can extend here simply to the same level.

The support according to the invention presents as a basic form a kind of tube with a round cross section around a longitudinal axis.

Advantageously this is a cylindrical tube.

This should have approximately constant wall thickness.

Preferentially, it is a cylindrical tube with a circular cross section.

Such a tube is easy to manufacture and also has very good characteristics for use in an impeller pump or radial pump as an external pump chamber wall.

This can consist of stainless steel for a resistance to corrosion, as it is known fundamentally for this use.

In an advantageous embodiment of the invention, the heating means or heating elements are arranged on an outer side of the support or heater device.

Preferably, the heating means are divided flat or cover not only by themselves directly an area with a certain width of the heating means.

Rather, they can naturally cover a certain distance with respect to each other, a certain area or larger and therefore also produce a similarly distributed square surface power.

Particularly, an essential part, at least preferably 50%, or the maximum part of the support surface is heated.

Preferably, the thick-film heating conductors are as heat conducting paths, since they can be assembled in many different ways, for example with a corresponding thick-layer paste corresponding to silk-screen printing processes or the like.

[0009] In a fundamental configuration of the invention it can be envisaged that in the supernatant zone the heating means or the heating device itself have the same or essentially constant surface power.

In this way it can be achieved that the essential area of the heating device or of the support undergoes a uniform heating and thus also uniformly reaches a transfer of heat in the extracted and heated liquid.

To achieve this, an additional or elongated heating medium, which otherwise would not be available, can be provided in the supernatant zone.

In this way, the total performance of the heating device can grow as the surface of the support grows through the supernatant zone.

In another fundamental configuration of the invention, in the supernatant zone, the heating means or the heating device can have an unequal or different surface efficiency.

This can be achieved on the one hand by providing here in the supernatant zone almost no heating medium or only heating means in a very small perimeter.

Through the conduction of the heat of the support itself, particularly in the case of metal or stainless steel as support, the thermal transmission surface can be enlarged towards the extracted liquid, which as a rule proceeds with a supplementary heating.

On the other hand, a surface power can also be provided in the supernatant area by means of a heating means, which is added to the surface power of the support up to now.

In this way, it is possible to take advantage of a particularly good reduction of heat through the extracted liquid near the supernatant, for example because they flow particularly quickly or especially well.

The pump according to the invention, in particular as an impeller pump or radial pump, has at least one inlet in the pump chamber and at least one outlet outside the pump chamber in the pump body or in the pump chamber. .

This central inlet leads along the central longitudinal axis of the pump or concentrically to an impeller shaft into the pump chamber and into the impeller.

Starting from the impeller, the pump chamber extends around it, that is essentially of annular design.

An essential area of the outer wall of the pump chamber is formed after even the aforementioned heating device, almost as a kind of lining wall of the pump chamber.

[0010] An outlet of the pump chamber is provided at a remote end of the impeller of the pump chamber.

In this case, the outlet is separated from the end of the pump chamber with a width, which is based on the width of the pump chamber and then increases.

Advantageously the pump chamber is raised in the area shortly before the exit, for example along the half or one third of circulation, with an angle between 5 ° and 30 ° to the plane perpendicular to the central longitudinal axis of the pump and can then empty into the discharge tubes.

In this area that rises a little earlier to the outlets or the discharge tubes, the supernatant zone of the heating device is arranged, so that it can use the largest height of the pump chamber present at this point, which looks like a supernatant and it can pass in this.

As previously mentioned, a further possibility of an enlarged heater device with more surface area is therefore generally used here.

In addition, good heat reduction is possible here due to the good flow through the extracted water length. The other end of the heating device, which is advantageously cut approximately in a straight line, can be arranged at the other axial end of the pump chamber, particularly near the impeller or these, as well as the surrounding entrance in an approximate radial manner.

It is thus considered that the impeller usually circulates in an essentially in one plane or at least one rotationally symmetric extending limitation of the pump chamber, which simply favor a straight cut end of the heating device.

These and other features are deduced in addition to the claims, also from the description and the drawings, where the protection zone of the invention is determined through the successive claims.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Exemplary embodiments of the invention are shown schematically in the drawings and are explained in more detail below.

They show in this case:

FIG. 1 a section of a pump according to the invention with a heating device according to the invention,

Fig. 2 to 5 different cross-sectional views of heating devices according to the invention with inclined supernatant zones and different arrangements of electrothermal conductors therein,

Fig. 6 a pump modified according to the invention with a heating device according to the invention in lateral representation,

Fig. 7 the pump of Fig. 6 at 90 ° rotates about its longitudinal axis,

Fig. 8 the pump of Fig. 7 rotates again 90 ° about its longitudinal axis,

Fig. 9 the pump of Fig. 8 continues to rotate again 90 ° about its longitudinal axis, Fig. 10 a sectional representation through the pump in the position according to Fig. 6,

Fig. 11 the sectional representation of the pump corresponding to Fig. 10 with the sectional plane displaced inwards from the projection plane and

Fig. 12 the sectional representation of the pump corresponding to Fig. 10 with the cut level displaced out of the projection plane.

Detailed description of the embodiments

[0012] In FIG. 1, a pump 11 according to the invention with a pump body 12 shown as a section, is configured as the impeller pump or radial pump.

This can be used as an advantage in a dishwasher or in a washing machine.

The body of the pump 12 has an inlet 13 and an outlet 14 together with discharge tubes 15 outwardly of an annular pump chamber 16.

A conventional impeller 18 is arranged near the bottom of a pump chamber 17, which is actuated by a pump motor 20 described in more detail.

Such a pump is known from DE 102011003467 A1.

[0013] The pump chamber 16 of a heating device 22 according to the invention is delimited radially outward, which simultaneously forms a previously mentioned radially external pump chamber wall.

The heating device 22 consists of a metallic tubular support 24 and the heating elements 26 arranged on its external side. Their possible formations are further explained in the following. The heating device 22 is seated in the housing of the sealed pump 12 together with the sealing gasket 23a, generally U-type and round sealing gasket 23b.

[0014] As can be seen in Fig. 1, as well as in the corresponding Figs. 2 to 5, the heating device 22 is formed by a round and / or rounded side by another, advantageously cut to the length of a tube. Furthermore, these or the support 24 in FIG. 1 below have a previously mentioned supernatant zone 28, with which it protrudes on a plane, which extends perpendicular to this dotted longitudinal axis L of the heating device 22 as well as the pump 11. and at the upper end in Fig. 1 above to the left extends into the heating device 22.

In a simple configuration, the heating device 22 according to FIGS. 2, 4 and 5 can be obliquely cut. According to FIG. 3, which represents a simplified heater device 22 ', a supernatant zone 28' can neither be continuously formed nor marked. in a remarkable manner as tip or tongue that rises, therefore with a strong rise and a great descent shortly before the tip 28 '.

This has been explained above.

From FIG. 1, the advantage of the supernatant zone according to the invention is also well recognized, that is to say that the heating device 22 can also be provided, as well as heating elements 26 and thus a thermal capacity in the region of the pump chamber 16, which in the circumferential direction increases in part, to pass to outlet 14 and then to discharge pipe 15.

In this way, it is possible to enlarge the completely heated area in the pump 11 and, for example, also as explained in turn, that the total thermal capacity is increased, so that a surface power in the reactor remains approximately equal if possible. heating device 22 or in the support 24.

The outlet shape 14 or the left end of the pump chamber 16 can be imagined slightly when the body of the pump 12 flows upwards correspondingly from the upper left zone in Fig. 1 and particularly also the heating device 22 and by therefore it is no longer rectangular to the central longitudinal axis L up to the zone, which is shown below to the left of Fig. 1.

Particularly, this can be seen from the isolated representations of the heating devices of Fig. 2, 4 and 5.

A waterproofing by the left gaskets 23a and 23b right in the left gasket 23a is somewhat more complicated, because it does not extend at the same level perpendicular to the central longitudinal axis L.

But this can be easily solved simply by the fact that, the left sealing gasket 23a, as shown, comprises a left end edge of the heater device 22 of type U and therefore sits firmly and firmly.

In FIG. 2, it is now represented by means of an extracted heating device 22, how heating elements 26a to 26d are disposed which rotate therein.

The three lower heating elements 26a to 26c circulate from a contact 27a parallel to each other and also parallel downwards, so to speak the straight end edge of the heating device 22. The upper heating element 26d extends slightly upwards in the zone created by the supernatant zone 28 and thus has a greater distance markedly to the nearest heater element 26c.

Because of the distribution of the lateral heat in the support 24 of the heating device 22, it can be assumed that a heating of the liquid flowing along it is also carried out in this intermediate sector.

But this is essentially a variant of a heating device, which has approximately the same total heating power when the surface area increases.

[0015] In FIG. 4, another heating device 122 is shown, in which heating elements 126a and 126e leave the contacts 127a and 127b and circulate approximately in the direction of rotation of the heating device 122 or the support tube corresponding 124.

In this case, the heating elements 126a to 126e present, as far as possible, equal distances with respect to one another, so that only the heating element 126a extends parallel to the lower end edge of the heating device 122.

Already the next heating element 126b has already been pulled up somewhat and thus does not extend further in parallel.

It is still noteworthy that because of the inclined extensions of the heating elements 126 their lengths vary slightly.

This should be balanced by the corresponding change of its resistances or cross sections, particularly the width, so that each of the heating elements possibly also produces a large amount of thermal capacity.

With this configuration of the heating device 122, although the heating elements 126 to the upper heating element 126e have an ascending length, also a total thermal capacity can remain the same despite the added supernatant 128.

[0016] In Fig. 5, another variant of a heating device 222 according to the invention is shown.

A number of heating elements 226a to 226d also circulate here on a tubular support 224.

While the three lower heating elements 226a to 226c are formed in a similar manner and run parallel to each other, as well as parallel to the lower end edge of the support 224, an upper heating element 226d is formed differently.

To additionally also take advantage of the surface area gained from the supernatant 228, it is formed in a meander or wave form and thus directly covers a larger surface.

In addition, the heating element 226d heats up a larger area again due to its corrugated shape.

Due to its length it can in turn reduce a cross section, particularly a width, of the heating element 226d compared to the rest of the heating elements 226a to 226c, so that it also has a remarkably higher thermal capacity.

[0017] Accordingly, the heating device 222 according to FIG. 5 is an example of this, as it can be achieved through the enlarged area of the heating device or the support a total thermal capacity in a markedly increased way.

In the corresponding configuration of the upper heating element 226d, the surface power of the heating device 222 can also approximately correspond to that of a heater device cut straight on top with four heating elements corresponding to the heating elements 226a to 226c.

[0018] In Fig. 6 another pump 311 is schematically represented with another pump principle, as is known from the German patent application DE 102013211180.0 with application date of 14. June 2013 from the same applicant.

A pump body 312 here has an inlet 313 in a visible pump chamber 316 not seen here, where also an impeller (not shown) is disposed just below the inlet 313, therefore widely to the left.

This still corresponds to some extent to the pump 11 of FIG. 1. However, the pump chamber 316 and a heating device 322 which surrounds the pump chamber in such a way are then formed in the pump 311 of FIG. which extends from the impeller to the other direction, therefore to the right, particularly in the direction of a pump motor 320 or may even protrude thereto even a part.

Particularly a supernatant zone 328 of the heater device 322 now exceeds in a right direction away from the impeller and the inlet 313.

[0019] In FIG. 6, it is recognized from above to the right near the supernatant zone 328 of the heating device, as there is provided an outlet 314 of the pump chamber 316 or the body of the pump 312, which carries in the direction of the rotation of the extracted liquid into the projection plane up to below the discharge tubes shown 315.

It is also recognized in the discharge tube 315 that here the heating device 322 can not have a large height.

As already recognized in FIG. 1, it is possible, however, to provide above in FIG. 6 in the exit zone 314, very likely, the marked supernatant 328.

The heating device 322 can be formed essentially as described above or correspondingly to Fig. 2,4 and 5, therefore external heating elements have a different conformation and / or arrangement.

[0020] The rotation according to FIGS. 7 to 9 to 90 ° respectively clarifies how it can be used with the obliquely cut heating device 322 or the supernatant 328 correspondingly shaped the special shape of the outer wall of the pump chamber 316, to form the heating device as large as possible, which forms an essential part of this pump chamber wall.

From Fig. 9 it can be seen again especially that, just in the area, in which the outlet 314 or the discharge tubes 315 are separated from the pump chamber, it is no longer possible to foresee a supernatant zone in any way.

[0021] The offset cut levels of Fig. 10 to 12 make the course or shape of the heater device 322 again noticeable.

It is particularly remarkable how the respective maximum possible site or the maximum possible area is used in the outer pump chamber wall for the heating device.

It is presupposed in this case that the pump chamber or the pump body is determined here in the form essentially of an optimized outlet 314 or outlet tube 315.

Claims (10)

1. Pump (11,311) for electrical devices that transport water, with a pump body (12,312) and a pump chamber (16,316) in it, where at least one central inlet (13,313) is provided in the longitudinal direction of the pump in the pump chamber and at least one outlet (14,314) of the pump chamber, where a heating device (22, 122, 222,322) is arranged in the pump chamber (16,316) as a limitation of the pump chamber in the radial direction , where the heating device has a support (24,124) as a kind of tube with a round cross section around a longitudinal axis, where the inlet (13,313) leads to a wheel or impeller (18) of the pump and where starting from the impeller radially out of this, the annular design pump chamber is configured to at least partly surround the impeller, where the pump chamber (16,316) extends in the axial direction of the impeller pump (18) to the outlet (14,314) outside the camera of b omba at one end of the pump chamber remote from the impeller, where the outlet leaves the end of the pump chamber, characterized by the fact that the support (24,124) protrudes above a plane perpendicular to the longitudinal axis in at least one end with a supernatant zone (28, 128, 228, 328) and with an obstacle zone extending along this plane or below, where the supernatant zone (28, 128, 228, 328) of the heating device (22, 122, 222, 322) is arranged in the area of the pump chamber (16,316) near the outlet (14,314) or in front of the outlet in the direction of circulation . 2. Pump according to claim 1, characterized in that the pump (11,311) is a radial pump or impeller pump. Pump according to claim 1 or 2, characterized in that the heating device (22, 122, 222, 322) forms a radially external limitation of the pump chamber (16, 316), preferably the essential area of a radially outer edge or coating wall of the pump chamber. Pump according to any of the preceding claims, characterized in that the heating device is arranged (22, 122, 222, 322) with the other end near the impeller (18) or radially outside the impeller and approximately at its axial height and here the end is cut straight. Pump according to any of the preceding claims, characterized in that the support (24.124) is obliquely cut at the end with the supernatant zone (28, 128, 228, 328) with a cutting level, which is at an angle of 5 ° to 45 ° to the longitudinal axis, preferably 15 ° to 30 °. Pump according to any one of the preceding claims, characterized in that at the end with the supernatant zone (28, 128, 228, 328) an end edge of the support (24,124) extends continuously without obstacles or incisions, preferably at the same level. Pump according to any one of the preceding claims, characterized in that the support (24.124) as a basic form is a tube, particularly a cylindrical tube, preferably a cylindrical tube with a circular cross-section. Pump according to any one of the preceding claims, characterized in that heating means are arranged on an external side of the support (24,124), preferably distributed over the surface area, particularly as heat conducting paths (26, 126,226) as heating conductors of thick film or the like. Pump according to claim 8, characterized in that in the supernatant zone (228) the heating means (226) and / or the heating device (222) have the same surface or constant power. Pump according to claim 8, characterized in that in the supernatant zone (28, 118,328) the heating means (26,126) or the heating device (22,122) have a surface power that is not identical or different.