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.

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

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.