U.S. patent application number 15/260608 was filed with the patent office on 2017-03-16 for equalization system of compressors pressure, equalization pressure method and system operation in cooling hermetic compressors.
This patent application is currently assigned to Whirlpool S.A.. The applicant listed for this patent is Whirlpool S.A.. Invention is credited to Dietmar Erich Bernhard Lilie, Sergio Koerich LOHN.
Application Number | 20170074557 15/260608 |
Document ID | / |
Family ID | 56893858 |
Filed Date | 2017-03-16 |
United States Patent
Application |
20170074557 |
Kind Code |
A1 |
Lilie; Dietmar Erich Bernhard ;
et al. |
March 16, 2017 |
Equalization System of Compressors Pressure, Equalization Pressure
Method and System Operation in Cooling Hermetic Compressors
Abstract
The present invention describes a valve mechanism for
refrigerating machines compressors. More specifically, the valve
mechanism operates to allow the equalization of pressure between
the compression chamber of a reciprocating compressor and the
discharge volume of the same compressor. This equalization is aimed
at reducing the torque required for departure. The present
invention lies in the field of mechanical engineering, more
specifically in the field of fluid and cooling mechanics.
Inventors: |
Lilie; Dietmar Erich Bernhard;
(Joinville, BR) ; LOHN; Sergio Koerich;
(Florianoplis, BR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Whirlpool S.A. |
Sao Paulo |
|
BR |
|
|
Assignee: |
Whirlpool S.A.
|
Family ID: |
56893858 |
Appl. No.: |
15/260608 |
Filed: |
September 9, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F25B 2500/07 20130101;
F25B 2500/26 20130101; F25B 49/022 20130101; F04B 49/035 20130101;
F25B 31/023 20130101; F04C 23/008 20130101; F25B 2600/0262
20130101; F04B 35/04 20130101; F04C 28/24 20130101; F04B 39/10
20130101; F25B 41/04 20130101; F04B 39/123 20130101; F04C 28/06
20130101 |
International
Class: |
F25B 31/02 20060101
F25B031/02; F25B 41/04 20060101 F25B041/04 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 11, 2015 |
BR |
10 2015 022515 6 |
Claims
1. Pressure equalization system for compressor characterized by: a.
at least one primary valve mechanism provided pressure equalization
means between the discharge volume and inlet volume; and b. at
least one secondary valve mechanism provided with means to hold the
backflow of the pressurized working fluid comprised in the output
line of the compressor; wherein the primary valve mechanism is
comprised upstream of the valve mechanism; and wherein the
secondary valve mechanism is downstream of the primary valve
mechanism and in fluid communication with the compressor outlet
line.
2. System according to claim 1, characterized by the compressor
being comprised within a hermetic volume enclosed in a hermetic
case.
3. System according to claim 1, characterized in that for cooling
systems.
4. The compressor pressure equalization method characterized by a
pressure equalization system as defined in claim 1 and in which the
primary mechanism of valve promotes pressure equalization between
the discharge volume and the intake volume at a time before the
start of the compressor.
5. Pressure equalization method, according to claim 4,
characterized by said pressure equalization promotion be started by
receiving a starting signal from the compressor.
6. Use of compressor pressure equalization system, as defined in
claim 1, characterized for being in hermetic compressor for
refrigeration systems.
Description
FIELD OF THE INVENTION
[0001] The present invention describes a valve mechanism for
compressors. The present invention lies in the field of mechanical
engineering, more specifically in the field of fluid and cooling
mechanics.
BACKGROUND OF THE INVENTION
[0002] Among the various technological resources that are currently
used, the compression refrigeration systems stand out for their
wide versatility that attends the needs current days. Whether in a
simple refrigerator, air conditioning, or even in large
refrigeration plants, cooling systems compression enabled large
steps in the evolution of the various technical fields.
[0003] Current compressors have small size, low power consumption,
besides other large implementations aimed at lower costs and higher
productivity.
[0004] One of the most critical points in the operation of a
compressor is the time of its initial starting when the machine is
turned on for the first time or after a long time without working,
both from the high mechanical stress point of view, that from the
point of view of large engine power request that it moves.
Currently, most domestic compressors fitted refrigerators have a
capacitor that permits greater availability of energy for the
electric motor at the time of starting the cooling system. Largely,
this need for increased power at the time of departure is due to
the pressure differential between the discharge volume and the
cavity of the compressor.
[0005] In addition to the inertia of the mechanisms, the
aforementioned pressure differential makes the starting of
compressors reciprocal, the moment of greatest energy consumption,
and request of electromechanical components involved.
[0006] Solving the differential pressure problem between the
discharge volume and the cavity of the compressor, becomes,
therefore, a notorious goal, that being solved involves lighter
compressors with fewer devices, more robust and less costly
operation from an energy point of view.
[0007] In search of prior art on scientific and patent literature,
were not found documents suggesting or anticipating the teachings
of the present invention, so that the solution proposed here
possesses novelty and inventive activity in relation to the prior
art.
SUMMARY OF THE INVENTION
[0008] Thus, the present invention aims to solve the listed
problems in the art, from a valve system able to equalize the
pressure between a pressurized medium and a first pressurized
medium so as to reduce the starting load of the middle
pressurizer.
[0009] In a first aspect, the present invention provides an
equalization system of compressor pressure, comprising: [0010] a.
at least one primary mechanism of valve (3) provided pressure
equalization means between the discharge volume (8) and inlet
volume (9); and [0011] b. at least one secondary valve mechanism
(2) provided with means to hold the backflow of the pressurized
working fluid comprised in the output line of the compressor;
[0012] wherein the primary valve mechanism (3) is comprised
upstream of the valve mechanism (2) and the secondary valve
mechanism (2) is downstream of the primary valve mechanism (3) and
in fluid communication with the line compressor output.
[0013] In a second aspect, the present invention provides a
pressure equalization method for compressors, where the primary
valve mechanism (3) promotes pressure equalization between the
discharge volume (8) and inlet volume (9) to a time before the
start of the compressor.
[0014] In a third aspect, the present invention provides the use of
pressure equalization system for compressors, where the system is
as defined in the present invention and the compressor being a
hermetic compressor for refrigeration systems.
[0015] Furthermore, the inventive concept common to all the claimed
protection contexts refers to a device capable of equalizing the
pressure between compressor chambers in order to avoid the need for
high loads at the time of starting of said compressors.
[0016] These and other objects of the invention will be immediately
appreciated by those versed in the art and by companies with
interests in the sector, and will be described in sufficient detail
to reproduce in the following description.
BRIEF DESCRIPTION OF THE FIGURES
[0017] In order to better define and clarify the content of this
patent application, these figures are presented:
[0018] FIG. 1 illustrates a reciprocating compressor provided with
an equalization pressure system, according to the present
invention.
[0019] FIG. 2 shows a second embodiment for the present invention,
where one may observe a reciprocating compressor allocated in a
hermetical case (10) provided with pressure equalization system
allocated on the outside of said hermetic case (10).
[0020] FIG. 3 shows an embodiment of the present invention, where
the primary valve mechanism (3) and the secondary valve mechanism
(2) are allocated in the hermetic volume (1), bounded by hermetic
case (10).
DETAILED DESCRIPTION OF THE INVENTION
[0021] It is a first object of the present invention, to provide a
pressure equalization system compressor, comprising: [0022] a. at
least one primary valve mechanism (3) provided pressure
equalization means between the discharge volume (8) and inlet
volume (9); and [0023] b. at least one secondary valve mechanism
(2) provided with means to hold the backflow of the pressurized
working fluid comprised in the output line of the compressor;
[0024] wherein the primary valve mechanism (3) is comprised
upstream of the valve mechanism (2) and the secondary valve
mechanism (2) is downstream of the primary valve mechanism (3) and
in fluid communication with the line compressor output.
[0025] In one embodiment, the compressor proposed by the present
invention is comprised within a hermetic volume (1) enclosed in a
hermetic case (10).
[0026] In one embodiment, the system proposed by the present
invention is applied in cooling systems.
[0027] It is a second object of the present invention to provide a
pressure equalization method in compressors where the primary valve
mechanism (3) promotes pressure equalization between the discharge
volume (8) and inlet volume (9) in a time before the start of the
compressor.
[0028] In one embodiment, said pressure equalization promotion is
initiated by receiving a starting signal from compressor.
[0029] It is a third and last object of the present invention to
provide the use of pressure equalization system for compressors,
where the system is as defined in the present invention and the
compressor is a hermetic compressor for refrigeration systems.
EXAMPLE 1
Realization
[0030] The examples shown herein are intended to illustrate only
one of many ways of performing the invention, but without limiting
the scope thereof.
[0031] According to FIG. 1, the system of the present invention
comprises a hermetic volume (1) contained within a hermetic case
(10). FIG. 1 shows a primary valve mechanism (3) responsible for
equalizing pressure between the discharge volume (8) and inlet
volume (9), wherein said primary valve mechanism (3) to be
released, depressurizes the discharge volume (8) in hermetic volume
(1). Once the inlet volume (9) in pressure equilibrium with the
hermetic volume (1), the pressure between the discharge volumes (8)
becomes the same to said inlet volume (9).
[0032] FIG. 1 also displays the secondary valve mechanism (2)
responsible for preventing the working fluid that has been
pressurized in the compressor outlet line does not return. This
secondary valve mechanism (2) it is necessary for the pressure
equalization between the primary valve mechanisms proposed (3) does
not affect the remainder of the pressurized fluid line after the
compressor.
[0033] FIG. 1 further illustrates a compression chamber (4)
provided with fluid outlet valve (6) and a fluid intake valve (7)
operating in synchronization with the piston (5), fundamental for
the functioning of an alternative compressor.
[0034] FIG. 2 depicts a variant of the first embodiment where both
the primary valve mechanism (3) and the secondary valve mechanism
(2) have been allocated within the hermetic volume (1), bounded by
hermetic case (10).
EXAMPLE 2
Realization
[0035] FIG. 3 shows a second possible embodiment for the present
invention. As in the first embodiment, the system of this second
embodiment comprises a hermetic volume (1) contained within a
hermetic case (10). FIG. 3 also shows a primary valve mechanism (3)
responsible for equalizing pressure between the discharge volume
(8) and inlet volume (9), wherein said primary valve mechanism (3)
when released, depressurized discharge volume (8) in an external
duct (11) linking the primary valve mechanism (3) to the inlet
volume (9), or to any duct that joins to said inlet volume (9).
Once the inlet volume (9) in pressure equilibrium with the external
duct (11) between the discharge pressure volumes (8) becomes the
same to said inlet volume (9).
[0036] Still in FIG. 3, it is possible to observe the secondary
valve mechanism (2) responsible for preventing the working fluid
that has been pressurized in the compressor outlet line, returns.
As in the first embodiment, the secondary valve mechanism (2) it
becomes necessary so that the pressure equalization between the
primary valve mechanisms proposed (3) does not affect the remainder
of the pressurized fluid line after the compressor.
[0037] Those skilled in the art will value the knowledge presented
herein, and may reproduce the invention shown in the embodiments,
and in further variations which fall within the scope of the
appended claims.
* * * * *