Valve plate with recess

Abstract

The invention relates to the use of a recess on the suction side of a valve plate in order to create a space between coolant on a cylinder head and a compressor block. The spacing creates additional resistance to a hot passage of coolant from the cylinder head to the block, thereby reducing overheating of coolant fluid within the compression cylinder. Thus, it is not necessary to use an intermediate plate during assembly of the compressor, which improves its thermal efficiency.

Description

Technical Field

[0001] The present invention relates to a valve plate having a recessed portion to create a space between a cylinder head and a cylinder block, thereby improving the thermal efficiency of a compressor. Background Art

[0002] The compressor efficiency is directly affected by the temperature of the coolant to be compressed and pumped. In this way, in order to improve the efficiency of the compressor, an attempt should be made to isolate the heat transfer from the hot parts of the compressor to the parts in contact with the coolant to be compressed. Among the parts that are in more direct contact with the coolant to be compressed, the following parts are in focus: suction muffler, valve plate and compression cylinder.

[0003] The valve plate is the component located between the cylinder head and the compressor block and is the main heat transfer path between these two components.

[0004] In the prior art, an additional component with the function of ensuring the spacing between the cylinder head and the valve plate is used, usually referred to as a pseudo-plate or intermediate plate. In addition to the need to use additional components in the prior art, the solutions usually introduce additional interfaces between the components with the sealing function. Therefore, a constant problem in the solutions identified in the prior art is an additional leakage point and therefore a loss of cooling capacity.

[0005] US patent application US2013108493 A1, entitled "VALVE PLATE FORA COMPRESSOR", published on May 2, 2013 in the name of PANASONIC CORPORATION, describes a valve plate, the purpose of which is to thermally isolate the compressor suction muffler from the discharge point on the compressor cylinder head, wherein the valve plate comprises three plate elements, the first plate being made of a thermally insulating material, and the second and third plates being made of a metallic material. However, this invention, in addition to resuming the use of an additional intermediate plate, also presents a recess directly on the valve plate filled with an insulating fluid, thereby enabling it to thermally isolate the cylinder head and the compressor block.

[0006] Chinese patent application CN204941843U entitled "A valve plate for a refrigeration compressor" published on January 6, 2016 in the name of Dongbei Electromechanical Co., Ltd. describes a valve plate for a refrigeration compressor, including: a valve plate body provided with an exhaust hole, the valve plate body consisting of a first valve plate body, a second valve plate body and a third valve plate body, the first valve plate body, the second valve plate body and the third valve plate body are completely molded by injection molding; the second valve plate body is located between the first valve plate body and the third valve plate body; the first valve plate body is an insulating valve plate body. However, the present invention does not require the use of an intermediate plate, which reduces the leakage area of ​​the coolant, and reduces the tolerance map, improves the positioning of the components and avoids manufacturing problems associated with additional components.

[0007] The Chinese patent application CN112392692A entitled "Compressor" published on February 23, 2021 in the name of Hangzhou Qianjiang Refrigeration Compressor Group Co., Ltd. mentions a valve plate, including a valve plate body, an air inlet, an air outlet and an assembly hole, wherein the air inlet, the air outlet and the assembly hole are arranged in the valve plate body, and the side walls of the air inlet and the air outlet are coated with a heat insulation layer. Unlike the present invention, the Chinese application does not introduce additional thermal resistance into the valve plate without relying on an intermediate plate. Summary of the invention

[0008] The valve plate is the component located between the cylinder head and the cylinder block and is the main heat transfer path between these two components.

[0009] In this sense, the invention consists in embossing at least one recessed area in the suction face on the valve plate so as to create a gap between the coolant on the cylinder head and the compressor block. This gap will create additional resistance to the passage of coolant heat from the cylinder head to the cylinder block, thus reducing the overheating of the coolant in the compression cylinder. Thus, there is no need to use an intermediate plate during the assembly of the compressor, which improves its thermal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The objects and advantages of the present invention will become more apparent from the following detailed description of examples and the non-limiting drawings presented at the end of this document.

[0011] Figure 1A The discharge side of a prior art valve plate is shown.

[0012] Figure 1B The suction side of a prior art valve plate is shown.

[0013] Figure 2 An assembly of a compressor using a prior art valve plate is shown.

[0014] Figure 3 An assembly of a compressor using a valve plate having the recess of the present invention is shown.

[0015] Figure 4 The suction side of the valve plate of the present invention is shown with a recess. DETAILED DESCRIPTION

[0016] Figure 1A and Figure 1B The discharge side 100 and the suction side 102 of a valve plate in the prior art are respectively shown. The valve plate comprises a valve plate body, one or more air inlet holes, and one or more air outlet holes, wherein the air inlet holes and the air outlet holes are arranged in the valve plate body.

[0017] Figure 2The present invention is an assembly of a compressor using a valve plate 200 of the prior art and an intermediate plate 202 located between the valve plate 200 and a compression cylinder head 204. In this assembly, in addition to the need to use an additional component (intermediate plate 202), the assembly also introduces an additional interface between components having a sealing function, which creates additional leakage points and a larger tolerance map, which impairs a portion of the efficiency gain obtained by insulation, thereby increasing the variability of the compressor efficiency.

[0018] Figure 3 An assembly of a compressor is shown that uses the valve plate of the present invention with recesses 300, eliminates the need for an intermediate plate, and reduces the number of interfaces between the cylinder head 302 and the cylinder block 304. In this case, newly compressed coolant is discharged into the cylinder head. After compression, the coolant temperature reaches a high value. Therefore, the coolant, which is trapped at a high temperature within the cylinder head 302, begins to lose heat to its surroundings, including the cylinder block.

[0019] Figure 4 The suction side of the valve plate of the present invention is depicted, comprising:

[0020] Valve plate body 402;

[0021] Air inlet 403;

[0022] Exhaust hole 404;

[0023] Mounting hole 405,

[0024] The air inlet hole 403 , the air outlet hole 404 and the mounting hole 405 are arranged in the body of the valve plate 402 ; a group of recesses 406 , 408 are included, and the coolant is deposited in the recesses.

[0025] These recesses 406, 408 are produced in areas on the valve plate that have no other functions. Examples of areas that cannot be lowered have several other functions, such as: suction valve seat, compression cylinder seal, screw seal and bolt connection support / anchoring.

[0026] Thus, the recess created reduces the direct contact of the hot valve plate with the cylinder block, since it is occupied by the coolant, consisting of a good thermal insulator. Thus, thermal insulation is increased and efficiency benefits are achieved. Thus, although the assembly is simplified, fewer leak points are created inside the cylinder head and a larger volume of fluid can be had, since the use of an intermediate plate in the prior art cuts down on the volume of the cylinder head due to its thickness.

[0027] Although the present invention has been described in conjunction with certain preferred embodiments, it should be understood that the present invention is not intended to limit the disclosure to such specific implementations. On the contrary, it is intended to cover all possible substitutions, modifications and equivalents within the spirit and scope of the present invention defined by the appended claims.

Claims

1. A valve plate, comprising: A valve plate body (402), wherein the valve plate body has at least one air inlet hole (403) and at least one air outlet hole (404); Wherein, at least one air inlet hole (403) and at least one air outlet hole (404) are provided in the valve plate body (402); Wherein, the valve plate is characterized in that the valve plate further comprises: A set of recesses (406, 408) are filled with coolant on the suction side of the valve plate.

2. The valve plate according to claim 1, characterized in that: The recesses (406, 408) are positioned in an area of ​​the valve plate that has no other functions.

3. The valve plate according to claim 1, characterized in that: The valve plate is located between the cylinder head (302) and the cylinder body (304).

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