U.S. patent application number 14/611345 was filed with the patent office on 2015-12-03 for accumulator for combined component with internal heat exchanger especially for refrigerant loops with r774 as working fluid.
The applicant listed for this patent is Halla Visteon Climate Control Corp.. Invention is credited to Felix Girmscheid, Marc Graaf, Stephan Koster.
Application Number | 20150345844 14/611345 |
Document ID | / |
Family ID | 53676761 |
Filed Date | 2015-12-03 |
United States Patent
Application |
20150345844 |
Kind Code |
A1 |
Koster; Stephan ; et
al. |
December 3, 2015 |
ACCUMULATOR FOR COMBINED COMPONENT WITH INTERNAL HEAT EXCHANGER
ESPECIALLY FOR REFRIGERANT LOOPS WITH R774 AS WORKING FLUID
Abstract
A coolant accumulator including an accumulation tank with a
suction pipe assembly, wherein the suction pipe assembly includes
an external suction pipe and an internal suction pipe which are
positioned coaxially and at a distance from each other, and
connected with each other by way of a connecting piece at the
respective lower ends of the suction pipes to form a flow path, and
wherein the connecting piece features a radially positioned oil
balancing bore which connects an oil sump region of the
accumulation tank with the flow path in the suction pipe
assembly.
Inventors: |
Koster; Stephan;
(Langerwehe, DE) ; Graaf; Marc; (Krefeld, DE)
; Girmscheid; Felix; (Koln, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Halla Visteon Climate Control Corp. |
Daejeon |
|
KR |
|
|
Family ID: |
53676761 |
Appl. No.: |
14/611345 |
Filed: |
February 2, 2015 |
Current U.S.
Class: |
62/512 |
Current CPC
Class: |
F25B 31/004 20130101;
F25B 2400/051 20130101; F25B 43/006 20130101 |
International
Class: |
F25B 43/00 20060101
F25B043/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 2, 2014 |
DE |
10 2014 101 585.1 |
Sep 24, 2014 |
DE |
10 2014 113 793.0 |
Claims
1. A coolant accumulator for a motor vehicle coolant circuit
comprising: an accumulation tank; a suction pipe assembly disposed
in the accumulation tank, the suction pipe assembly including an
external suction pipe and an internal suction pipe positioned
coaxially with an annular gap formed therebetween; and a connecting
piece connecting a lower end of the external suction pipe with a
lower end of the internal suction pipe to form a flow path, the
connecting piece including a radially extending oil balancing bore
connecting an oil sump region of the accumulation tank with the
flow path.
2. The coolant accumulator according to claim 1, wherein the oil
balancing bore is formed in the connecting piece at a point
intermediate the lower end of the internal suction pipe and a lower
end of the connecting piece.
3. The coolant accumulator according to claim 1, wherein the oil
balancing bore is formed in the connecting piece at a midpoint
between the lower end of the internal suction pipe and a lower end
of the connecting piece.
4. The coolant accumulator according to claim 1, wherein the
connecting piece includes a rounded ring-shaped contour to
facilitate a 180 degree flow reversal in the flow path.
5. The coolant accumulator according to claim 1, wherein the
connecting piece includes a pine tree profile configured to receive
the lower end of the external suction pipe.
6. The coolant accumulator according to claim 5, wherein the lower
end of the external suction pipe is shrink-fitted onto the pine
tree profile of the connecting piece.
7. The coolant accumulator according to claim 1, wherein a
thickness of a wall of the connecting piece in a region of the oil
balancing bore is between 0.4 mm and 3 mm.
8. The coolant accumulator according to claim 1, wherein a diameter
of the oil balancing bore is between 0.2 mm and 3 mm.
9. The coolant accumulator according to claim 1, wherein the oil
sump region of the accumulation tank is conically tapered.
10. The coolant accumulator according to claim 1, wherein a filter
surrounds the connecting piece in a region of the oil balancing
bore.
11. The coolant accumulator according to claim 10, wherein the
filter is a filter ring.
12. The coolant accumulator according to claim 11, further
comprising annular bulges formed on the connecting piece configured
to receive the filter ring.
13. The coolant accumulator according to claim 1, wherein the
accumulation tank is disposed in a pressure-resistant outer
container.
14. The coolant accumulator according to claim 13, further
comprising an internal heat exchanger disposed between the
accumulation tank and the outer container.
15. The coolant accumulator according to claim 14, wherein the
internal heat exchanger is configured as a coiled tube.
16. The coolant accumulator according to claim 14, wherein the
internal heat exchanger is disposed in an upper portion of the
coolant accumulator between the accumulation tank and the outer
container.
17. The coolant accumulator according to claim 1, wherein the
accumulation tank is produced from a synthetic material.
18. The coolant accumulator according to claim 1, wherein the
accumulation tank is produced from one of polybutylene
terephthalate, polyethylene, and polypropylene.
19. The coolant accumulator according to claim 1, wherein the
accumulation tank includes an accumulation tank cover.
20. The coolant accumulator according to claim 19, wherein the
accumulation tank cover is a cyclone.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to German Patent
Application No. DE 10 2014 101 585.1 filed on Feb. 2, 2014 and
German Patent Application No. DE 10 2014 113 793.0 filed on Sep.
24, 2014, the entire disclosures of which are hereby incorporated
herein by reference.
FIELD OF THE INVENTION
[0002] The invention relates to a coolant accumulator, in
particular for motor vehicle coolant circuits. Coolant
accumulators, also known as coolant collectors, are used in coolant
circuits to separate liquid coolant from coolant vapors, while at
the same time, coolant oil is separated and collected as well. The
coolant accumulator is further used for adding coolant oil to the
coolant vapor in the finest possible dispersion, in order to feed
the coolant oil to the coolant compressor.
BACKGROUND OF THE INVENTION
[0003] In certain coolant circuits, it can be advantageous to
implement an additional functionality into the coolant accumulator.
This is the integration of a heat exchanger as an internal heat
exchanger into the component, for instance by way of an
undercooling heat exchanger. In coolant circuits using R744 as a
coolant, for instance, this can be advantageously implemented.
[0004] Coolant accumulators, therefore, can be summarized as having
the task of separating the liquid from the gaseous phase.
Furthermore, through the siphoning of the gaseous phase, the
construction of the coolant accumulators achieves the oil return
flow into the coolant compressor, and it also implements a filter
for the liquid phase in the coolant accumulator.
[0005] Various forms of coolant accumulators are known from prior
art. From U.S. Pat. Appl. Pub. No. 2005/0229632 A1, a coolant oil
for the liquid phase of an air-conditioning system is known, which
was conceived specifically for the requirements of a cooling system
using CO.sub.2 by way of coolant. The siphoning of the coolant is
done by way of a piping system, the end of which is centrally
positioned in the upper region of the accumulator. No internal heat
exchanger is integrated into this coolant accumulator, and the pipe
for siphoning the coolant vapors leads down in an arch, from the
axially centered upper end, following the contours of the bottom,
and then back up to the off-center outflow point.
[0006] From U.S. Pat. Appl. Pub. No. 2004/0093894 A1, a coolant
accumulator is known for the liquid phase of the coolant of an air
conditioning system which has an axially centered straight pipe for
the siphoning of the coolant, with an inflow point in the upper
region, and an outflow point at the bottom.
[0007] U.S. Pat. Appl. Pub. No. 2008/0041093 A1 discloses a coolant
accumulator for air-conditioning systems which has a piping system
consisting of coaxially arranged external and internal pipes, with
an inflow point in the upper region of the accumulator into the
external pipe, and an outflow point at the axially centered outflow
point of the internal pipe, upward out of the accumulator.
SUMMARY OF THE INVENTION
[0008] The purpose of the invention is to provide a coolant
accumulator, and specifically, a coolant accumulator for motor
vehicle coolant circuits, capable of achieving an effective
separation between the liquid and gaseous phases, and which also
has a pipe for the siphoning of the gaseous phase, including the
oil return flow. The coolant accumulator must be manufacturable in
a cost-effective and technically not too complex way. Moreover, the
functionality of the components must be guaranteed for the long
term by way of the ability to integrate a filter array for the
returning coolant oil.
[0009] This task is achieved by way of the object with the
characteristics of Patent Claim 1. Further developments are
indicated in the subsidiary patent claims.
[0010] The task of the invention is solved in particular by way of
a coolant accumulator for motor vehicle coolant circuits which
features an accumulation tank with a suction pipe assembly in it.
The suction pipe assembly consists of an external suction pipe and
an internal suction pipe, which are positioned coaxially and at a
distance from each other inside the accumulation tank. The external
suction pipe and the internal suction pipe are connected with each
other by way of a connecting piece at the respective lower ends of
the pipes. Via this connecting piece, the flow path of the coolant
extends in the annular gap between the external and the internal
suction pipe from the top into the connecting piece, where it is
redirected inward, and then flows upward through the internal
suction pipe. The connecting piece features a radially positioned
oil balancing bore, which connects an oil sump region of the
accumulation tank with the flow path in the suction pipe
assembly.
[0011] According to an embodiment of the invention, the oil
balancing bore in the connecting piece is at the height of half the
distance between the lower end of the internal suction pipe and the
lower end of the connecting piece.
[0012] Desirably, the connecting piece is surrounded in the region
of the oil balancing bore by a filter, which filters the oil that
is drawn in from the oil sump region before entering the oil
balancing bore.
[0013] The connecting piece is specifically suited for the pressure
loss minimization at the 180.degree. flow reversal of the flow
path. Preferentially, a rounded ring-shaped contour is provided, so
that the flow path is guided radially from the outside inward, in a
180.degree. reversal.
[0014] For the reception of the external suction pipe, a pine tree
profile is provided at the upper end of a connecting piece, onto
which the external suction pipe can be shrunk in a technically
simple manner.
[0015] In the region of the oil balancing bore, the connecting
piece shown features a wall thickness between 0.4 mm and 3 mm.
[0016] The oil balancing bore itself as shown features a diameter
between 0.2 mm and 3 mm.
[0017] For the concentration of the coolant oil in the accumulation
tank, the oil sump region is conically tapered off towards the
bottom, so that even when the coolant oil volume is low, the
coolant oil level is relatively high, so that the oil balancing
bore is always within the range of the separated coolant oil below
the liquid coolant.
[0018] The filter for the coolant oil is preferentially embodied as
a filter ring. For the reception of the filter ring, it is
advantageous that the connecting piece features annular bulges.
According to an advantageous embodiment, the accumulation tank is
positioned in a pressure-resistant outer container, and an internal
heat exchanger for the coolant circuit is located between the
accumulation tank and the outer container. The embodiment of the
internal heat exchanger is as a coiled tube in the annular gap
between the accumulation tank and the outer container. It was
proven to be particularly advantageous that the accumulation tank
is made out of a synthetic material with a low degree of water
absorption, such as polybutylene terephthalate, polyethylene, or
polypropylene.
[0019] The accumulation tank is closed at the top by an
accumulation tank cover, which features an opening in the region of
the manifold, which is embodied such that it can be closed with a
cap. For an efficient separation of the liquid and vapor mixture it
is advantageous to embody the accumulation tank cover as a cyclone
for the separation of this mixture.
[0020] Functionally, the accumulator separates not only liquid
coolant, but also coolant oil. The coolant oil, however, must be
removed again from the sump of the accumulator, and be added to the
coolant mass flow circulating in the coolant circuit, or be
returned to the coolant compressor. This is done by way of a
suction pipe, through which the gaseous coolant flows out. In the
accumulator sump there is a small oil balancing bore, through which
the gas flow siphons, or sucks out, the coolant oil. Through this
oil balancing bore, however, coolant oil is not the only substance
that enters into the coolant vapor flow, but so does liquid
coolant, which adds a liquid component to the exiting gaseous
phase. This inevitable liquid component should typically not exceed
10% of the total mass of the flow. In order to minimize this
problem, the correct diameter of the oil balancing bore was
determined, which is typically very small, in the range of 0.2 to 3
mm. Typical production tolerances therefore carry a significant
functional weight. Furthermore, the geometric orientation of the
oil balancing bore has a considerable impact on the sensitivity and
the amount of the siphoned liquid. According to one aspect of the
invention, the geometric orientation determines whether production
tolerances can be compensated or not, or whether the siphoned
liquid quantities are always within the specified range.
[0021] The advantages of the invention consist of a cost-effective
way to produce the coolant accumulator. Furthermore, the coolant
accumulator tank can be produced from synthetic material, which
allows for better heat insulation from the environment.
Constructively speaking, there is a considerable freedom of design,
which is advantageous in particular for the construction of the
cyclone as a liquid separator. Due to the conically tapering oil
sump region, the oil sump volume is minimized, allowing for the
reliable siphoning of coolant oil and for a relatively low degree
of coolant liquid.
[0022] In the embodiment of the coolant accumulator as a combined
part which integrates the accumulator and the internal heat
exchanger in a single component, the internal heat exchanger is
positioned coaxially around the accumulation tank. This has the
additional advantage that the wall of the accumulation tank is not
warmed up by the heat of the engine compartment, but rather, is
insulated against the intrusion of heat from the engine compartment
by the low pressure side of the internal heat exchanger.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Other details, characteristics, and advantages of the
embodiments of the invention follow from the following description
of exemplary embodiments, with reference to the respective
drawings:
[0024] FIG. 1: Longitudinal section of the coolant accumulator;
[0025] FIG. 2: Longitudinal section of the accumulation tank with
the suction pipe assembly;
[0026] FIG. 3: Enlarged fragmentary sectional view showing a lower
end of the accumulation tank and the suction pipe assembly;
[0027] FIG. 4: Enlarged fragmentary sectional view showing the
lower end of the accumulation tank and the suction pipe
assembly;
[0028] FIG. 5: Perspective view of the coolant accumulator without
the accumulation tank;
[0029] FIG. 6: Enlarged fragmentary schematic sectional view of a
lower region of the accumulation tank with flow paths for the
coolant;
[0030] FIG. 7A: Partially exploded perspective view of an
accumulation tank cover;
[0031] FIG. 7B: Perspective view of the accumulation tank cover;
and
[0032] FIG. 8: Fragmentary perspective view of a lower region of
the suction pipe assembly with a filter in cross-section, and an
oil balancing bore.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS OF THE INVENTION
[0033] The following detailed description and appended drawings
describe and illustrate various embodiments of the invention. The
description and drawings serve to enable one skilled in the art to
make and use the invention, and are not intended to limit the scope
of the invention in any manner.
[0034] FIG. 1 shows the coolant accumulator 1 as a combined part
with an integrated internal heat exchanger 15 in a longitudinal
section. An outer container 14 of the coolant accumulator 1
consists in this embodiment of a top part 18 and a base part 19,
which are connected with each other by means of a cylindrical
mantle 20. The outer container 14 with its components is designed
in a pressure-resistant manner and the individual components of the
combined part are arranged inside it. The combined part is defined
as a coolant accumulator which apart from its coolant accumulator
function also fulfills the function of an internal heat
exchanger.
[0035] In the cylindrical mantle 20 of the outer container 14, the
cylindrical connecting piece 6 of the base part 19 and the top part
18, radially, from the outside inward, always concentric to the
cylinder axis, are positioned the heat exchanger 15 as a coiled
tube, then the accumulation tank 2 for the collection of the liquid
coolant, and the suction pipe assembly 3 for guiding the coolant
vapor flow. The lower region of the accumulation tank 2 is referred
to as oil sump region 9, which tapers conically downward in order
to concentrate and collect the coolant oil settling there.
[0036] FIG. 2 displays a longitudinal section of the accumulation
tank 2 and of the suction pipe assembly 3. The suction pipe
assembly 3 consists of an internal suction pipe 5 and an external
suction pipe 4, whereby the suction pipes 4, 5 are connected by
means of the connecting piece 6 at the lower ends of the suction
pipes 4, 5. The accumulation tank 2 is embodied in a cylindrical
manner, and it is closed at the top by an accumulation tank cover
16. In the lower region, the accumulation tank 2 is embodied in a
conically tapering manner as the oil sump region 9, whereby the oil
sump region 9 is in the region of the connecting piece 6 between
the external suction pipe 4 and the internal suction pipe 5.
[0037] In FIGS. 3 and 4, a segment of the lower region of the
accumulation tank 2 is shown in magnification. A constructive
peculiarity of the coolant accumulator 1 is the connection between
the external suction pipe 4 and the internal suction pipe 5, This
connection is realized by means of the connecting piece 6. This
connecting piece 6 has at its upper end a pine tree profile 13 for
the reception of the external suction pipe 4. An advantage of the
construction of this embodiment is that despite the high pressures
of the coolant, the accumulation tank 2 itself is not required to
resist pressure, because the pressure is almost identical on the
inside and on the outside of accumulation tank 2, the low pressure
side of the coolant circuit, with the exception of the pressure
differential due to losses of flow through the component.
Therefore, the accumulation tank 2 can be made out of a synthetic
material, which leads to a number of advantages. In particular,
synthetic materials typically feature heat-insulating properties,
so that they have a heat-insulating effect on the environment and
on the internal heat exchanger. Therefore, the heat is conducted
only into the low pressure component of the internal heat exchanger
15, and not into the accumulation tank 2, since otherwise it would
cause the coolant liquid in the accumulation tank 2 to evaporate,
therefore the coolant could not be stored in accumulation tank 2,
as desired.
[0038] In the outer wall of the connecting piece 6, which takes
over the guidance of the low pressure flow from the external
suction pipe 4 to the internal suction pipe 5, there is an oil
balancing bore 7 through which the coolant vapor flow is connected
with the oil sump region 9 and with the coolant oil that is
collecting there. Via the oil balancing bore 7, the oil moves from
the oil sump region 9 into the coolant vapor flow, which is
redirected at the end of connecting piece 6 by 180.degree. and then
flows into the internal suction pipe 5, and then upward. On the
connecting piece 6 there are two annular bulges 12, which serve the
purpose of receiving a filter 10 in the form of a filter ring in
such a manner as to form a seal.
[0039] The external suction pipe 4 is shrink-fitted onto the pine
tree profile 13 of the connecting piece 6.
[0040] The annular bulges 12 form sealing diameters for the filter
10 which protect the oil balancing bore 7 against contaminants.
[0041] According to a further embodiment, a drying agent is
positioned in the oil sump region 9 of the accumulation tank 2,
such that the oil balancing bore 7 continues to be protected by the
filter 10. In this embodiment, a disc-shaped sieve or a filter
presses against the surface of the drying agent granulate filing in
order to prevent the raising and swirling of the granulate. The
sieve, which is not shown, has an outer diameter corresponding to
the inner diameter, or the contours, of the accumulation tank 2. In
its middle there is a corresponding opening for the suction pipe
assembly 3.
[0042] The oil balancing bore 7 is situated radially with respect
to the axis of the coolant accumulator 1 and below the lower end of
the internal suction pipe 5, approximately at the level of half the
distance between the lower end of the suction pipe 5 and the lower
end of the connecting piece 6. The oil balancing bore 7 typically
features a diameter between 0.29 mm and 2.1 mm.
[0043] A thickness of a wall of the connecting piece 6 corresponds
to a length of the oil balancing bore 7, and is typically in the
range of 0.49 mm to 2.1 mm.
[0044] FIG. 5 shows the embodiment of the coolant accumulator 1
designed as a combination part with an internal heat exchanger 15
without the pressure-proof cylindrical mantle 20 in
perspective.
[0045] The coolant accumulator is bounded in the axial direction by
the top part 18 and the base part 19. The internal heat exchanger
15 is situated in the upper region. The lower region of the
accumulation tank 2 can be seen below the internal heat exchanger
15.
[0046] FIG. 6 is a schematic illustration of the flow path 8 for
the vaporized coolant within the suction piping assembly 3. The
flow path 8 of the coolant extends downward along an annular gap
between the external suction pipe 4 and the internal suction pipe
5. In the lower region of the accumulation tank 2 is the connecting
piece 6, to the outside of which the external suction pipe 4 is
shrink-fitted and connected. The connecting piece 6, in turn,
extends further towards the base of the accumulation tank 2, where
there are bars for receiving and centering the internal suction
pipe 5.
[0047] Similarly, a covering plate which protects the external
suction pipe 4 against the drawing in of liquid coolant, holds and
spaces the internal suction pipe 5 in the upper region. The
covering plate is attached to the external suction pipe 4, and
features three bars, which guide the internal suction pipe 5 into
the external suction pipe 4, and provide for the existence of the
annular gap. These bars are also situated in the connecting piece
6. The internal suction pipe 5 is positioned axially against the
connecting piece 6 via the cover 16.
[0048] The flow path 8 of the coolant vapor mixture extends between
the connecting piece 6 and the internal suction pipe 5 towards the
axial end of the connecting piece 6, where the flow path 8 is
redirected by 180.degree., first inward, and then upward. The
vaporized coolant therefore enters into the internal suction pipe
5, and flows upward again. In the oil sump region 9 of the
accumulation tank 2, the connecting piece 6 features an oil
balancing bore 7 with a radial orientation with respect to axis of
the coolant accumulator 1. The oil balancing bore 7, the flow path
8 in the connecting piece 6 is materially connected with the oil
sump region 9, allowing oil from the oil sump region 9 to be drawn
in and carried away by the vaporized coolant through the oil
balancing bore 7.
[0049] In the lower region of the connecting piece 6, adjacent to
the pine tree profile 13, annular bulges 12 are situated above and
below the oil balancing bore 7 for receiving the external suction
pipe 4, which serve for receiving a filter 10.
[0050] For the 180.degree. redirection of the flow path 8 at the
lower end of the connecting piece 6, the latter features a rounded
ring-shaped contour 11 for the purpose of implementing the flow
reversal of the flow path 8 with a minimum of loss, in hydrodynamic
terms.
[0051] FIGS. 7A and 7B show an accumulation tank cover 16, which is
shown in FIG. 7A with an unclosed opening, and in FIG. 7B with an
opening closed by a cap 17. Like the accumulation tank 2, the
accumulation tank cover 16 is preferentially made out of a
synthetic material as well, and features the functionality of a
cyclone for the separation of the liquid phase of the incoming
coolant from the gaseous phase. Due to its complexity, the
accumulation tank cover 16 with its integrated cyclone cannot be
made as single piece as an injection-moulded part. For purposes of
demoulding in production, via the injection moulding procedure, the
accumulation tank cover 16 features an opening in the region of the
manifold for incoming dual-phase coolant, which can be closed by
the cap 17.
[0052] FIG. 8 shows the lower region of the suction pipe assembly
3. The external suction pipe 4 is shown as shrink-fitted over the
pine tree profile 13 of the connecting piece 6. The oil balancing
bore 7 in the lower region of the connecting piece 6 is protected
against contaminations on the outside, and therefore also against
clogging and blockage, by way of the upstream filter 10 in the form
of the ring filter on the oil balancing bore 7. According to a
peculiarity of the construction of the coolant accumulator 1 in the
embodiment as a combined part with the integrated internal heat
exchanger 15, the filter 10 is integrated into the coolant
accumulator 1, but positioned outside of the container for the
liquid coolant in the oil sump region 9. In addition to the filter
10, an additional filter is situated underneath the accumulation
tank 2, in the region of the oil sump region 9, which filtrates the
total coolant mass flow at the outflow point at the low pressure
side of the internal heat exchanger 15.
[0053] For the coolant accumulator 1, this results in a filtration
of 100% immediately before the outflow of the coolant vapors on the
low pressure side, meaning, after the internal heat exchanger 15.
Since the coolant accumulator 1 has a very large internal surface,
the potential for unintended penetration of contaminants is
relatively high. A filter immediately prior to the outflow of the
combined part offers the advantage of a certain intrinsic safety
with respect to intolerable contaminations.
[0054] A drying agent must be present in the coolant circuit, and
typically it is located inside the coolant accumulator 1. For these
purposes, for example, pouches made out of a textile fabric may be
used, filled with the drying agent silica gel. According to one
advantageous embodiment of the invention, hygroscopic plastics are
used that are capable of absorbing up to 2 or 3% of water. This
corresponds to up to 50% of the absorptive capacity of the drying
agent. Therefore, coolant accumulators 1 made out of hygroscopic
plastics must either be protected during the production process and
during shipping and handling against environmental moisture, or
alternatively, the quantity of the drying agent must be increased
equivalently. The latter option, however, reduces the storage
capacity of the coolant accumulator 1 for liquid coolant. In order
to reduce the risk, synthetic materials with very low water
absorption are used, such as PBT, PE, or PP.
[0055] An advantageous embodiment of the invention consists of the
utilization of the capacity of synthetic materials to absorb
moisture, and to implement this moisture absorption capacity for
the purposes of coolant desiccation. This can lead to a cost
reduction for drying agents, as well as to an increased storage
capacity of the accumulator for more liquid coolant.
[0056] While certain representative embodiments and details have
been shown for purposes of illustrating the invention, it will be
apparent to those skilled in the art that various changes may be
made without departing from the scope of the disclosure, which is
further described in the following appended claims.
REFERENCE LIST
[0057] 1 Coolant accumulator [0058] 2 Accumulation tank [0059] 3
Suction pipe assembly [0060] 4 External suction pipe [0061] 5
Internal suction pipe [0062] 6 Connecting piece [0063] 7 Oil
balancing bore [0064] 8 Flow path [0065] 9 Oil sump region [0066]
10 Filter [0067] 11 rounded ring-shaped contour [0068] 12 Annular
bulge [0069] 13 Pine tree profile [0070] 14 Outer container [0071]
15 Internal heat exchanger [0072] 16 Accumulation tank cover [0073]
17 Cap [0074] 18 Top part [0075] 19 Base part [0076] 20 Cylindrical
mantle
* * * * *