Recessed valve plate

Abstract

The present invention involves the use of a recess on the suction side of the valve plate to provide spacing between the coolant on the cylinder cover and the compressor block. This spacing creates additional resistance to the passage of heat from the coolant from the cylinder cover to the block, reducing overheating of the coolant in the compression cylinder. This eliminates the need for an intermediate plate during compressor assembly, improving thermal efficiency.

Description

[Technical Field]

[0001] The present invention relates to a valve plate having a recess for providing a gap between a cylinder cover and a block, thereby improving the thermal efficiency of a compressor. [Background technology]

[0002] The efficiency of a compressor is directly affected by the temperature of the refrigerant being compressed and pumped. Thus, to increase the efficiency of a compressor, it is necessary to block the heat transfer from the hot parts of the compressor to the parts that come into contact with the refrigerant being compressed. Among the parts that come into more direct contact with the refrigerant being compressed, the following can be highlighted: intake muffler, valve plate, and compression cylinder.

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

[0004] In the current state of the art, an additional part, commonly referred to as a false plate or intermediate plate, is used to ensure the spacing between the cylinder cover and the valve plate. In addition to the need to use an additional part, the current state of the art generally introduces an additional interface between the parts, which has a sealing function. Therefore, the problem with the solutions identified in the current state of the art is always the increased number of leakage points and the resulting loss of cooling capacity.

[0005] U.S. Patent Application US 2013108493 A1, "Valve Plate for Compressor," published May 2, 2013, by Panasonic Corporation, describes a valve plate designed to thermally insulate a compressor's intake muffler from the compressor's cylinder head discharge. The valve plate has three plate elements, with the first plate made of a thermally insulating material and the second and third plates made of a metallic material. However, the present invention not only eliminates the need for an additional intermediate plate, but also provides a recess directly in the valve plate, which is filled with a thermally insulating fluid, thereby thermally insulating the cylinder cover from the compressor block.

[0006] DONPER ELECTROMECHANICAL's Chinese application CN 204941843 U, "Refrigerator Compressor Valve Plate," published on January 6, 2016, describes a refrigerator compressor valve plate that includes: a valve plate body having an exhaust hole and including a first valve plate body, a second valve plate body, and a third valve plate body integrally molded by injection molding; the second valve plate body is positioned between the first valve plate body and the third valve plate body; and the first valve plate body is an insulated valve plate body. However, the present invention does not require the use of an intermediate plate, thereby reducing the refrigerant leakage area, reducing process tolerance charting, improving part positioning, and avoiding manufacturing problems associated with redundant parts.

[0007] Chinese patent application CN112392692A, published on February 23, 2021, by HANGZHOU QIANJIANG REFRIGERATION COMPRESSOR GROUP CO LTD, describes a "compressor" that refers to a valve plate having a valve plate body, a gas inlet hole, an exhaust hole, and an assembly hole. Here, the gas inlet hole, the exhaust hole, and the assembly hole are disposed in the valve plate body, and the sidewall surfaces of the gas inlet hole and the exhaust hole are each coated with a heat-insulating layer. Unlike the present invention, this 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 a component located between the cylinder cover and the block and is the main heat transfer path between these two components.

[0009] In this sense, the present invention includes printing on at least one area of ​​the recess of the valve plate on the intake face to provide a gap for the coolant between the cylinder cover and the compressor block. This gap creates additional resistance to the passage of heat from the cylinder cover to the block, reducing overheating of the coolant in the compression cylinder. This eliminates the need for an intermediate plate during the compressor assembly process, improving thermal efficiency.

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

[0011] [Figure 1A] FIG. 1A shows the discharge side of a state-of-the-art valve plate.

[0012] [Figure 1B] FIG. 1B shows the suction side of a state-of-the-art valve plate.

[0013] [Figure 2]FIG. 2 shows a compressor assembly using a state-of-the-art valve plate.

[0014] [Figure 3] FIG. 3 shows a compressor assembly using the recessed valve plate of the present invention.

[0015] [Figure 4] FIG. 4 shows the suction side of a valve plate with recesses of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] 1A and 1B show the exhaust and intake sides (100, 102) of a state-of-the-art valve plate, respectively. The valve plate includes a valve plate body, one or more gas inlet holes, and one or more exhaust holes. The gas inlet holes and exhaust holes are located within the valve plate body.

[0017] 2 shows a compressor assembly using a state-of-the-art valve plate 200 and an intermediate plate 202 between the valve plate 200 and a compression cylinder cover 204. In addition to requiring the use of an additional component, the intermediate plate 202, this assembly introduces additional interfaces between sealing parts, which increases leak points, increases process tolerance charting, and increases compressor efficiency variability by negating some of the efficiency gains achieved through insulation.

[0018] FIG. 3 shows a compressor assembly using a valve plate with recesses 300 of the present invention, eliminating the use of an intermediate plate and reducing the number of interfaces between the cylinder cover 302 and the block 304. In this case, the just-compressed refrigerant is discharged into the cylinder cover. After compression, the refrigerant temperature reaches a high value. Therefore, the hot refrigerant trapped inside the cylinder cover 302 begins to lose heat to the surroundings, including the block.

[0019] FIG. 4 shows the intake side of a valve plate according to the present invention, which includes a valve plate body 402 , gas inlet holes 403 , exhaust holes 404 , and mounting holes 405 . Gas inlet holes 403, exhaust holes 404, and mounting holes 405 are located in the valve plate body 402, which includes a pair of recesses (406, 408) in which coolant is deposited.

[0020] These recesses (406, 408) are formed in areas of the valve plate that do not have any other function. Examples of areas that cannot be lowered include areas that have some other function, such as intake valve seats, compression cylinder seals, screw seals, bolt support / fixtures, etc.

[0021] In this way, the recess formed is occupied by the coolant, which has good thermal insulation, reducing direct contact between the hot valve plate and the block. This improves insulation and achieves efficiency benefits. Therefore, assembly is simplified while reducing leak points. Also, the use of an intermediate plate in the current technology reduces the volume of the cylinder cover due to its thickness, allowing for a larger fluid volume within the cylinder cover.

[0022] While the present invention has been described in connection with specific preferred embodiments, it should be understood that it is not intended to limit the disclosure to such particular results, but rather to cover all possible alternatives, modifications, and equivalents within the spirit and scope of the invention as defined by the appended claims.

Claims

1. a valve plate body (402) having at least one gas inlet hole (403) and at least one exhaust hole (404); At least one gas inlet hole (403) and at least one exhaust hole (404) are arranged in the valve plate body (402); A valve plate comprising a pair of recesses (406, 408) on the intake side of the valve plate, the recesses being filled with a coolant.

2. 2. The valve plate according to claim 1, wherein the recesses (406, 408) are arranged in areas of the valve plate that do not have any other function.

3. 2. The valve plate according to claim 1, wherein the valve plate is disposed between a cylinder cover (302) and a block (304).

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