U.S. patent application number 14/787045 was filed with the patent office on 2016-03-31 for pump arrangement.
The applicant listed for this patent is HANNING ELEKTRO-WERKE GMBH & CO. KG. Invention is credited to Harald Buchalla.
Application Number | 20160090979 14/787045 |
Document ID | / |
Family ID | 51176017 |
Filed Date | 2016-03-31 |
United States Patent
Application |
20160090979 |
Kind Code |
A1 |
Buchalla; Harald |
March 31, 2016 |
PUMP ARRANGEMENT
Abstract
A pump arrangement having a unit which comprises a material with
a magnetocaloric action, an arrangement of conduits which are in
the region of the unit and through which a liquid or gaseous
heat-conduction medium flows and a pump system operating according
to travelling-wave principles.
Inventors: |
Buchalla; Harald; (Soest,
DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HANNING ELEKTRO-WERKE GMBH & CO. KG |
Oerlinghausen |
|
DE |
|
|
Family ID: |
51176017 |
Appl. No.: |
14/787045 |
Filed: |
May 20, 2014 |
PCT Filed: |
May 20, 2014 |
PCT NO: |
PCT/DE2014/100171 |
371 Date: |
October 26, 2015 |
Current U.S.
Class: |
417/53 ;
417/412 |
Current CPC
Class: |
Y02B 30/00 20130101;
F04B 43/0072 20130101; F04B 43/09 20130101; F25B 21/00 20130101;
Y02B 30/66 20130101; F04B 43/12 20130101 |
International
Class: |
F04B 43/09 20060101
F04B043/09 |
Foreign Application Data
Date |
Code |
Application Number |
May 23, 2013 |
DE |
10 2013 105 288.6 |
Claims
1. A pump arrangement comprising a device with a material having a
magnetocaloric effect, a conduit arranged in the area of the device
through which a liquid or gaseous heat transfer medium flows, and a
pump system operating on the traveling wave principle.
2. A pump arrangement according to claim 1, wherein the pump system
is provided spatially integrated into the working unit.
3. A pump arrangement according to claim 1, wherein characterized
in that the working unit has a rotating working electrical motor
having a rotor and a stator and wherein the pump system is at least
partially integrated in a space formed between the rotor and the
stator of the electrical motor.
4. A pump arrangement according to claim 1, wherein means are
provided for periodically providing a magnetic field.
5. A method for conveying a heat conducting medium through an
arrangement with a material having the magnetocaloric effect,
comprising rotationally operating, at a rotational frequency in the
range of 0.2 Hz to 20 Hz, a pump system operating on the traveling
wave principle and conveying the heat conducting medium.
6. The method according to claim 5, wherein the material which has
the magnetocaloric effect is periodically subjected to a magnetic
field.
7. (canceled)
8. A method for conveying a heat conducting medium through an
arrangement with a material having the magnetocaloric effect,
comprising rotationally operating, at a rotational frequency in the
range of 1 Hz to 10 Hz, a pump system operating on the traveling
wave principle and conveying the heat conducting medium.
Description
[0001] Devices using the "magnetocaloric effect" phenomenon to work
as heat pumps have been known for quite some time. In these
devices, materials which have the magnetocaloric effect are
periodically exposed to a magnetic field. Under the influence of
the magnetic field, the specific heat capacity or thermal storage
capacity of the material changes.
[0002] By supplying and discharging media (gases, liquids), the
device may be supplied with thermal energy, which can be
transformed to a different temperature level and then be
discharged. For the supply and discharge of media, pump systems are
required. These pump systems must operate with low-maintenance and
good efficiency. In the following, a pump system is disclosed which
is particularly well suited for this application.
STATE OF THE ART
[0003] FIG. 1 shows an assembly 1, to which a medium having a
temperature .delta..sub.1 is supplied, and from which a medium with
temperature .delta..sub.2 is discharged. In order to produce the
effect of temperature transformation, preferably rotary energy is
input into such an assembly. Due to the relatively large thermal
time constants of the components used in the units, the rotational
frequency of the rotational motion induced in the assembly by
external drives must be low (in particular between 0.5 Hz and 20
Hz, preferably in the range of 1 Hz to 10 Hz). These external
drives can be formed, for example, by a combination of distinctly
faster running, generally cylindrical shaped, electric motor 2 and
a reduction gear 3.
[0004] A distinctly disc-shaped, slow-running motor 4 is
significantly more compact, quieter, lower-maintenance and more
energy efficient. The motor 4 can be particularly advantageously
designed as a multi-pole axial flux motor. In FIG. 2, such a motor
is illustrated as an asymmetrical (one sided) axial flow motor. It
is designed as a synchronous motor and consists of a stator 5 and a
rotor 6. A torque, and thus rotational motion, is generated in the
permanent magnets 7 fixed to the rotor 6 by applying a rotating
field to the coils 8. The torque can be transferred via the shaft
9. FIG. 3 shows an analogous device in the form of a symmetrical
structured double-sided axial flow device. Also suitable for the
above purpose is the use of a permanent magnet synchronous device
according to the external rotor principle (see FIG. 4).
Characteristic of both engine variants is the cavity between the
rotor and stator.
DESCRIPTION OF THE INVENTION
[0005] The gap between the rotor and stator is in this case a
particularly good way to house one or more pumps for transporting
the heat conducting medium.
[0006] Considering the optimal spatial and functional integration
of the entire assembly and in view of the set drive characteristics
with the low speed, it has been shown to be advantageous to make
use of pump systems working on the traveling wave principle. Such
pump systems are described for example in the European patent EP
1317626 B1.
[0007] FIG. 5 shows how to put a pump system in an annular groove
on the stator 5 according to the traveling wave principle. By the
rotational movement of the rotor 6, the cam 10 periodically passes
over the membrane assembly 11, whereby a liquid or gaseous medium
can be conveyed via the connections 12 and 13. The cross-section of
the tubular membrane arrangement 11 corresponds to the arrangement
described in the European patent EP 1317626 B1. The pump can be
operated virtually without wear and is virtually maintenance-free,
quiet and efficient. In accordance with the principle of the
traveling wave pump, no seals on moving parts are needed. Since
little friction occurs between the cam 10 and diaphragm assembly
11, the components involved are hardly subject to wear. As this
pump arrangement can work by displacement or as a flow pump (e.g.,
via adjustable cam height), a wide range of pressure levels, for
example in the range from 10 mbar to 20 bar, can be realized.
Further, a not shown means for providing a variable magnetic field
is provided.
[0008] FIG. 6 shows a further development of the arrangement with
two independent media circulations via another concentric membrane
assembly 14 and another cam 15. Via the connections 16 and 17
another media circuit can operate. Furthermore, FIG. 6 shows that
the membrane assemblies 11 and 14 would also be possible in
different cross-sections (widths, heights). Therewith, for example,
the different radial rotational speeds of the cam can be
compensated to achieve the same flow rates in both circuits.
However other mixed modes with different flow rates or pressure
levels can be realized.
[0009] Similarly, further, in particular concentric, arrangements
for other circuits are conceivable and possible.
[0010] FIG. 7 shows a further development of the previous
arrangement for a symmetrical (two-sided) designed axial flow,
which as stated above can be realized in different variants.
[0011] FIG. 8 shows radially a circumferentially segmented
arrangement. Segmentation can be implemented in any number and
shape.
[0012] FIG. 9 shows an arrangement with a plurality of cams per
orbit (any number and shape imaginable).
[0013] FIG. 10 shows further locations for the membrane
assemblies.
[0014] FIG. 11 shows analogous conceivable positions of membrane
assemblies in a permanent magnet synchronous machine according to
the external rotor principle.
[0015] If a motor of a different design, for example by the
internal rotor principle is used, the considerations are analogous
between two plane-parallel plates or between respective radial
hollow spaces between an inner and an outer wall of two cylindrical
assemblies in or on the magnetocaloric unit.
[0016] In particular, it may be provided that, to improve
efficiency of the arrangements, measures may be taken to reduce the
friction and in particular between the membrane 11, 14 and the cams
10, 15. To that extent, the already low friction be further
improved by the provision of rollers or by improving the sliding
property - for example by coating the membrane 11, 14 respectively
or the cams 10, 15.
[0017] The disclosed embodiments of the invention can be combined.
They are each an example, of which individual features of the
embodiments by themselves are or may be essential to the invention.
In addition, the pump system is merely exemplary housed in the gap
between the rotor and the stator. Basically, the pump system can be
arranged between any relatively moving components of the pump
assembly or the drive unit. Further, the motor can be positioned to
the side of the assembly or be integrated within the assembly at
any point. In this respect, there results an integrated
implementation with small space.
* * * * *