Check valve for compressor assembly and compressor, reservoir

Abstract

The application discloses a one-way valve for a compressor assembly, and a compressor and a liquid accumulator, the compressor assembly comprising a compressor and a liquid accumulator, at least one of the compressor and the liquid accumulator being provided with the one-way valve, the one-way valve being adapted to allow one-way exhaust of the compressor and one-way suction of the liquid accumulator, the one-way valve comprising a valve housing assembly and a valve core assembly, the valve housing assembly comprising a valve seat and an inner housing, the valve core assembly comprising a valve core unit and an elastic element, wherein a part of the valve core and the inner housing in sliding fit is a valve core fit part, a part of the inner housing and the valve core in sliding fit is an inner housing fit part, at least one of the valve core fit part and the inner housing fit part is subjected to a hardening treatment to form a surface hardening layer on at least a corresponding fit surface. According to the one-way valve, the wear problem can be effectively improved, and the adverse effect of wear on the service life and performance of the one-way valve is improved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a one-way valve for compressor components and a compressor and receiver. Background Technology

[0002] In order to achieve differential pressure start-up, some compressors in related technologies add a spring-loaded exhaust check valve. However, the wear problem of this check valve is relatively serious, and its service life is not long. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a one-way valve for a compressor assembly, wherein the wear problem of the one-way valve can be significantly improved.

[0004] The present invention also proposes a compressor having the above-mentioned one-way valve.

[0005] The present invention also proposes a liquid reservoir having the above-mentioned one-way valve.

[0006] According to a first aspect of the present invention, a one-way valve for a compressor assembly, the compressor assembly including a compressor and a liquid receiver, wherein at least one of the compressor and the liquid receiver is provided with the one-way valve, the one-way valve being adapted to allow the compressor to discharge in one direction and to allow the liquid receiver to draw in in one direction, the one-way valve comprising: a valve housing assembly including a valve seat and an inner housing, the inner housing defining an inner cavity between the valve seat and the valve seat, the valve seat having an inlet port communicating with the inner cavity, and the inner housing having an outlet port communicating with the inner cavity; and a valve core assembly including a valve core unit and an elastic element, the valve core unit... The device includes a valve core slidably disposed within the inner shell, the valve core unit being slidable relative to the inner shell between an open position (opening the air inlet) and a closed position (closing the air inlet), an elastic element being disposed between the valve core unit and the valve housing assembly, and providing the valve core unit with an elastic restoring force for movement from the open position to the closed position; wherein, the portion of the valve core that slides with the inner shell is a valve core mating portion, and the portion of the inner shell that slides with the valve core is an inner shell mating portion, and at least one of the valve core mating portion and the inner shell mating portion is hardened to form a surface hardened layer at least on the corresponding mating surface.

[0007] The check valve for compressor components according to embodiments of the present invention can effectively improve wear problems and mitigate the adverse effects of wear on the service life and performance of the check valve. Compared to directly replacing the original wear parts with materials of higher hardness, it avoids increased material costs and ensures that the other properties of the hardened components meet the original design requirements. Furthermore, compared to adding other wear-resistant parts, it avoids problems such as cumbersome assembly steps, increased costs, and larger check valve size caused by an increase in the number of parts. Therefore, the check valve according to embodiments of the present invention is suitable for mass production.

[0008] In some embodiments, the mating surface of the inner shell mating part is formed with a surface hardening layer and the surface hardness is A, and the mating surface of the valve core mating part is formed with a surface hardening layer and the surface hardness is B, and the ratio of A to B is 0.6 to 1.2.

[0009] In some embodiments, the mating surface of the inner shell mating part is formed with a surface hardening layer and the surface hardness A is HRC22-HRC38, and / or, the mating surface of the valve core mating part is formed with a surface hardening layer and the surface hardness B is HRC32-HRC45.

[0010] In some embodiments, at least one of the inner shell mating portion and the valve core mating portion undergoes chemical heat treatment to achieve surface hardening.

[0011] In some embodiments, the material of the inner shell mating part is low carbon steel, and it has been treated by nitriding, carbonitriding, or carburizing heat treatment.

[0012] In some embodiments, the valve core mating part is made of alloy structural steel and has undergone quenching and tempering heat treatment.

[0013] In some embodiments, the inner shell is subjected to chemical heat treatment and has a surface hardness of HRC32-HRC37.

[0014] In some embodiments, the valve core is subjected to chemical heat treatment and has a surface hardness of HRC38 to HRC43.

[0015] In some embodiments, at least one of the inner shell mating portion and the valve core mating portion is surface hardened by electroplating.

[0016] In some embodiments, at least one of the inner shell mating portion and the valve core mating portion is surface hardened by spraying.

[0017] According to a second aspect of the present invention, a compressor includes: a compressor housing, a drive assembly, a pump assembly, and a one-way valve. The drive assembly and the pump assembly are connected and both are disposed within the compressor housing. The one-way valve is a one-way valve according to a first aspect of the present invention, and the compressor discharges gas in one direction through the one-way valve.

[0018] According to an embodiment of the present invention, the compressor has an improved overall service life by providing the one-way valve described in the first aspect embodiment.

[0019] According to a third aspect of the present invention, a liquid reservoir includes: a liquid reservoir housing, a gas-liquid separation assembly, and a one-way valve. The gas-liquid separation assembly is disposed inside the liquid reservoir housing, and the one-way valve is a one-way valve according to a first aspect of the present invention. The liquid reservoir draws in gas in one direction through the one-way valve.

[0020] According to the embodiments of the present invention, the liquid reservoir has an improved overall service life by providing the one-way valve of the first aspect embodiment described above.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a compressor assembly according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A partially enlarged view of the check valve in the closed state;

[0024] Figure 3 yes Figure 1 A partially enlarged view of the check valve in the open position;

[0025] Figure 4 This is a cross-sectional view of a reservoir according to an embodiment of the present invention;

[0026] Figure 5 yes Figure 4 A partially enlarged view of the check valve in the closed state;

[0027] Figure 6 yes Figure 4 The image shows a partially enlarged view of the check valve in the open position.

[0028] Figure label:

[0029] Compressor assembly 1000;

[0030] One-way valve 100;

[0031] Valve housing assembly 1; valve seat 11; air inlet 111; inner housing 12; inner housing mating part 120;

[0032] Vent 121; Through hole 122; Inner cavity 13;

[0033] Valve core assembly 2; Valve core unit 21; Valve core 211; Valve core mating part 2110;

[0034] Columnar section 2111; Stop section 2112; Valve plate 212; Elastic element 22; Screw 23;

[0035] Valve housing 31; exhaust pipe 32;

[0036] Compressor 200; Compressor housing 41; Drive assembly 42; Pump body assembly 43; Process pipe 44; Suction pipe 45;

[0037] Liquid reservoir 300; liquid reservoir housing 51; gas-liquid separation assembly 52; air inlet pipe 53; air outlet pipe 54. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0040] Hereinafter, with reference to the accompanying drawings, a one-way valve 100 for a compressor assembly 1000 according to an embodiment of the present invention will be described.

[0041] like Figure 1 As shown, the compressor assembly 1000 includes a compressor 200 and a receiver 300. At least one of the compressor 200 and the receiver 300 is provided with a one-way valve 100, which is adapted to allow the compressor 200 to discharge in one direction and to allow the receiver 300 to draw in in one direction. That is, when the one-way valve 100 is used on the compressor 200, for example... Figures 1-3As shown, the compressor 200 can discharge air unidirectionally from the discharge position of the compressor 200 (e.g., at the discharge pipe 32 described later) through the one-way valve 100, without reverse intake air from the discharge position of the compressor 200 (e.g., at the discharge pipe 32 described later) through the one-way valve 100. It is worth noting that the one-way valve 100 described herein is not a one-way valve integrated into the pump body assembly 43 of the compressor 200 to control the one-way discharge of the cylinder, but is located outside the pump body assembly 43 and is used to realize the one-way discharge of the compressor 200 to the outside.

[0042] When the one-way valve 100 is used in the reservoir 300, for example... Figures 4-6 As shown, the reservoir 300 can draw air unidirectionally from its inlet position (e.g., the inlet pipe 53 described later) via the one-way valve 100, without reversing the flow of air from the reservoir 300's inlet position (e.g., the inlet pipe 53 described later) via the one-way valve 100. It is worth noting that regardless of whether the one-way valve 100 is used for the compressor 200 or the reservoir 300, the one-way valve 100 can adopt the embodiments described below, which will be further described below.

[0043] like Figure 2 and Figure 5 As shown, the one-way valve 100 includes a valve housing assembly 1, which includes a valve seat 11 and an inner shell 12. An inner cavity 13 is defined between the inner shell 12 and the valve seat 11. An air inlet 111 communicating with the inner cavity 13 is formed on the valve seat 11, and an air outlet 121 communicating with the inner cavity 13 is formed on the inner shell 12. That is, an air inlet 111 is formed on the valve seat 11, and an air outlet 121 is formed on the inner shell 12. Both the air inlet 111 and the air outlet 121 are connected to the inner cavity 13 formed between the inner shell 12 and the valve seat 11.

[0044] It is worth noting that, such as Figure 3 and Figure 6 As shown, when airflow can enter the inner cavity 13 through the air inlet 111 and exit the inner cavity 13 through the air outlet 121, the one-way valve 100 is in the open state, that is, the one-way valve 100 can realize the forward flow of airflow, such as... Figure 2 and Figure 5 As shown, if the airflow in the inner cavity 13 cannot be discharged in reverse through the air inlet 111, the one-way valve 100 is in the closed state, that is, the one-way valve 100 can prevent the airflow from flowing in reverse.

[0045] Based on this, such as Figure 2 and Figure 5As shown, the one-way valve 100 also includes a valve core assembly 2, which may include a valve core unit 21 and an elastic element 22. The valve core unit 21 includes a valve core 211 slidably inserted through the inner shell 12. That is, the valve core 211 is inserted through the inner shell 12 and is slidable relative to the inner shell 12 along the insertion direction. For example, the inner shell 12 may have a through hole 122, through which the valve core 211 is inserted and slidable relative to the inner shell 12 along the through direction of the through hole 122.

[0046] Specifically, the valve core unit 21 is in the open position relative to the inner housing 12 when the air inlet port 111 is opened (e.g., Figure 3 and Figure 6 (as shown) and the closed position of the air intake 111 (e.g.) Figure 2 and Figure 5 The valve core unit 21 and the valve housing assembly 1 are slidable between the two parts (as shown). The elastic element 22 is located between the valve core unit 21 and the valve housing assembly 1, and provides the valve core unit 21 with an elastic restoring force that moves from the open position to the closed position.

[0047] In other words, during the sliding process of the valve core 211 relative to the inner shell 12, the valve core unit 21 can reciprocate between the open and closed positions. Specifically, when the pressure in the air inlet 111 can overcome the elastic restoring force and exceed the opening force of the valve core unit 21, it can push the valve core unit 21 towards the open position, thereby realizing the switching of the one-way valve 100 to the open state (e.g., Figure 3 and Figure 6 (as shown); when the pressure at the air inlet 111 cannot overcome the elastic restoring force and is lower than the opening force of the valve core unit 21, the valve core unit 21 can return to the closed position under the action of the elastic element 22, thereby realizing the one-way valve 100 switching to the closed state (e.g. Figure 2 and Figure 5 (As shown).

[0048] The applicant discovered that some compressor components with differential pressure start-up capabilities in related technologies incorporate check valves within the liquid receiver and compressor. These check valves typically consist of a spring-loaded valve core and an inner shell. However, during compressor operation, airflow pulsation causes the valve core to vibrate relative to the inner shell, resulting in wear at the mating point. This wear affects the lifespan and performance of the check valve. Based on this, the applicant has made the following improvements to the check valve.

[0049] like Figure 1As shown, the part where the valve core 211 slides with the inner shell 12 is the valve core mating part 2110, and the part where the inner shell 12 slides with the valve core 211 is the inner shell mating part 120. That is to say, the valve core 211 has the valve core mating part 2110, and the inner shell 12 has the inner shell mating part 120. During the process of the valve core unit 21 sliding relative to the inner shell 12, the valve core 211 achieves sliding engagement through the mating surface of the valve core mating part 2110 and the mating surface of the inner shell mating part 120 of the inner shell 12.

[0050] At least one of the valve core mating portion 2110 and the inner shell mating portion 120 is hardened to form a surface hardening layer at least on the corresponding mating surface, so as to increase the surface hardness of at least one of the mating surfaces of the valve core mating portion 2110 and the inner shell mating portion 120, thereby reducing the wear between the valve core 211 and the inner shell 12.

[0051] In other words, at least the valve core mating portion 2110 of the valve core 211 can be hardened to form a surface hardened layer on at least the mating surface of the valve core mating portion 2110, thereby improving its surface hardness; or, at least the inner shell mating portion 120 of the inner shell 12 can be hardened to form a surface hardened layer on at least the mating surface of the inner shell mating portion 120, thereby improving its surface hardness; or, at least the valve core mating portion 2110 of the valve core 211 can be hardened, and at the same time, at least the inner shell mating portion 120 of the inner shell 12 can also be hardened to form a surface hardened layer on at least the mating surface of the valve core mating portion 2110, and at the same time, to form a surface hardened layer on at least the mating surface of the inner shell mating portion 120, thereby improving the surface hardness of both the mating surfaces of the valve core mating portion 2110 and the mating surfaces of the inner shell mating portion 120.

[0052] Therefore, when the compressor assembly 1000 is operating, the wear at the mating point between the valve core 211 and the inner shell 12 caused by the vibration of the valve core 211 relative to the inner shell 12 due to airflow pulsation can be improved and reduced, thereby increasing the service life and working performance of the one-way valve 100. Furthermore, by hardening the valve core mating portion 2110 and / or the inner shell mating portion 120 to form a surface hardening layer on the corresponding mating surfaces to increase surface hardness, instead of using materials with inherently high hardness, costs can be reduced, and other performance parameters of the valve core 211 and / or the inner shell 12, such as brittleness, can be ensured to meet design requirements.

[0053] In summary, the applicant not only creatively discovered that "the wear problem of the one-way valve 100, affected by airflow pulsation, mainly occurs at the sliding fit position between the valve core 211 and the inner shell 12," but also creatively proposed to at least harden the easily worn parts, forming a wear-resistant layer on the mating surface. This effectively improves the wear problem, mitigates the adverse effects on the service life and performance of the one-way valve 100, and results in minimal part deformation with no other adverse effects on the overall structure and performance of the one-way valve 100. Furthermore, because this application, rather than directly using a material with higher hardness to replace the original wear parts, effectively avoids increased material costs and ensures that the other properties of the hardened parts meet the original design requirements. In addition, because this application does not introduce other wear-resistant parts, it avoids an increase in the number of parts, thereby avoiding problems such as cumbersome assembly steps, increased costs, and increased size of the one-way valve 100 caused by an increase in parts. Therefore, the one-way valve 100 according to the embodiments of the present invention is suitable for mass production.

[0054] In some embodiments of the present invention, the mating surface of the inner shell mating portion 120 is formed with a surface hardening layer and the surface hardness is A (i.e., the hardness of the surface hardening layer formed on the mating surface of the inner shell mating portion 120 is A), and the mating surface of the valve core mating portion 2110 is formed with a surface hardening layer and the surface hardness is B (i.e., the hardness of the surface hardening layer formed on the mating surface of the valve core mating portion 2110 is B). The ratio of A to B is 0.6 to 1.2. That is, the value range of A / B is 0.6 to 1.2. For example, A / B can be 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, etc. Therefore, the surface hardness A of the inner shell mating portion 120 and the surface hardness B of the valve core mating portion 2110 are relatively close and will not differ too much. Thus, while ensuring that the surface hardness of one of the inner shell mating portion 120 and the valve core mating portion 2110 is larger, the surface hardness of the other is not too small or too large, thereby reducing wear while taking cost into account.

[0055] Furthermore, it is worth noting that when the surface hardness of the inner shell mating part 120 and the valve core mating part 2110 are both relatively high and have a large difference, it indicates that the surface hardness of one of them will be very high, which will lead to increased costs. Moreover, if the surface hardness of the inner shell mating part 120 is very high, it will lead to an increase in the overall brittleness of the inner shell 12. In this case, when the inner shell 12 is welded to the valve seat 11, the vibration of the valve core 211 will cause stress concentration at the welding position between the inner shell 12 and the valve seat 11, leading to problems such as fracture and affecting the reliability of the one-way valve 100.

[0056] In some optional embodiments of the present invention, the mating surface of the inner shell mating portion 120 is formed with a surface hardening layer and the surface hardness A (i.e., the hardness A of the surface hardening layer formed on the mating surface of the inner shell mating portion 120) is HRC22-HRC38. For example, A can be HRC22, HRC26, HRC30, HRC34, HRC38, etc. This can effectively reduce wear on the inner shell 12 at the sliding fit and ensure that the inner shell 12 has suitable brittleness, making it less prone to breakage. Further optionally, the surface hardness A can be HRC32-HRC37, such as HRC32, HRC33, HRC34, HRC35, HRC36, HRC37, etc. This can further reduce wear on the inner shell 12 at the sliding fit and ensure that the inner shell 12 has suitable brittleness, making it less prone to breakage.

[0057] In some optional embodiments of the present invention, the mating surface of the valve core mating portion 2110 is formed with a surface hardening layer and the surface hardness B (i.e., the hardness B of the surface hardening layer formed on the mating surface of the valve core mating portion 2110 is HRC32 to HRC45). For example, B can be HRC32, HRC36, HRC40, HRC43, HRC45, etc., thereby effectively reducing the wear of the valve core 211 at the sliding fit. Further optionally, the surface hardness B can be HRC38 to HRC43, such as HRC38, HRC39, HRC40, HRC41, HRC42, HRC43, etc. This further reduces the wear of the valve core 211 at the sliding fit and lowers costs.

[0058] In some optional embodiments of the present invention, the mating surface of the inner shell mating portion 120 is formed with a surface hardening layer and the surface hardness A is HRC22-HRC38. Simultaneously, the mating surface of the valve core mating portion 2110 is formed with a surface hardening layer and the surface hardness B is HRC32-HRC45. This effectively reduces wear at the sliding fit points of the inner shell 12 and the valve core 211, while ensuring that the inner shell 12 has appropriate brittleness and is less prone to breakage.

[0059] In some embodiments of the present invention, the inner shell mating portion 120 undergoes surface hardening through chemical heat treatment, i.e., chemical heat treatment is used as the hardening process to obtain a surface-hardened layer on the mating surface of the inner shell mating portion 120. This results in lower processing costs for the inner shell 12 and a suitable range of surface hardness, balancing cost and effectiveness. It should be noted that chemical heat treatment can be performed only on a portion of the mating surface of the inner shell mating portion 120 of the inner shell 12, thereby reducing the processing area and process cost. Alternatively, a large area including this portion can be chemically heat treated. For example, optionally, the entire inner surface of the inner shell 12 can be chemically heat treated; or alternatively, the entire inner shell 12 can be chemically heat treated, i.e., the entire surface of the inner shell 12 can be chemically heat treated, thereby reducing processing difficulty.

[0060] In some embodiments of the present invention, the valve core mating portion 2110 undergoes surface hardening through chemical heat treatment, i.e., chemical heat treatment is used as the hardening process to obtain a surface-hardened layer on the mating surface of the valve core mating portion 2110. This results in lower processing costs for the valve core 211 and a suitable range of surface hardness, balancing cost and effectiveness. It should be noted that chemical heat treatment can be performed only on a portion of the mating surface of the valve core mating portion 2110 of the valve core 211, thereby reducing the processing area and process cost. Alternatively, a large area including this portion can be chemically heat treated. For example, optionally, the entire inner surface of the valve core 211 can be chemically heat treated; or alternatively, the entire valve core 211 can be chemically heat treated, i.e., the entire surface of the valve core 211 can be chemically heat treated, thereby reducing processing difficulty.

[0061] In some embodiments of the present invention, both the inner shell mating portion 120 and the valve core mating portion 2110 undergo chemical heat treatment to achieve surface hardening. Therefore, in conjunction with the embodiments described in the two paragraphs above, it can be seen that the processing costs of both the inner shell 12 and the valve core 211 are relatively low, and the obtained hardness ranges are both suitable, balancing cost and effectiveness. Furthermore, the specific areas of the inner shell 12 and valve core 211 that undergo chemical heat treatment can be referred to the description in the two paragraphs above, and will not be repeated here.

[0062] For example, in some specific examples, the material of the inner shell mating part 120 is low-carbon steel, and it has undergone nitriding, carbonitriding, or carburizing heat treatment. Therefore, by selecting a suitable material and matching it with a corresponding chemical heat treatment process, the processing cost of the inner shell 12 is lower, the obtained surface hardness range is more suitable, the part deformation is smaller, balancing cost and effect, and ensuring good manufacturability for mass production. It is worth noting that the type of low-carbon steel is not limited; for example, it can include at least one of SPCC, SPCE, 10# steel, 10F, 15# steel, 15F, and 20# steel, thus facilitating its availability and use.

[0063] For example, in some embodiments, when the treatment is performed only in a local area of ​​the inner shell mating part 120, the surface hardness of that local area can be HRC22-HRC38 after treatment, while the surface hardness of the area of ​​the inner shell 12 that has not undergone chemical heat treatment is HRC12-HRC20. Thus, it can be seen that by performing chemical heat treatment, the surface hardness of the mating surface of the inner shell mating part 120 can be significantly improved, and wear can be reduced.

[0064] For example, in some specific examples, the valve core mating part 2110 is made of alloy structural steel and has undergone quenching and tempering heat treatment. Therefore, by selecting suitable materials and matching them with corresponding chemical heat treatment processes, the processing cost of the valve core 211 is low, and the obtained surface hardness range is suitable, balancing cost and effect, and ensuring good manufacturability for mass production. It is worth noting that the type of alloy structural steel is not limited; for example, it can include at least one of SCM435, 35CrMo, 35CrMoV, 42CrMo, 15Cr, and 15CrMo, thus facilitating its availability and use.

[0065] In some optional embodiments, the inner shell 12 undergoes overall chemical heat treatment to achieve a surface hardness of HRC32-HRC37. That is, the entire inner shell 12 is chemically heat treated, forming a surface hardened layer on all its surfaces. The surface hardened layer has a hardness of HRC32-HRC37, such as HRC32, HRC33, HRC34, HRC35, HRC36, HRC37, etc. This reduces processing difficulty, and the surface hardness of the inner shell 12 effectively reduces wear at the sliding contact with the valve core 211, while ensuring appropriate brittleness and preventing breakage.

[0066] In some alternative embodiments, the valve core 211 undergoes a complete chemical heat treatment, resulting in a surface hardness of HRC38 to HRC43. In other words, the entire valve core 211 is chemically heat treated, forming a surface-hardened layer on all its surfaces. This surface-hardened layer has a hardness of HRC38 to HRC43, such as HRC38, HRC39, HRC40, HRC41, HRC42, HRC43, etc. This reduces processing difficulty, and the surface hardness of the valve core 211 effectively reduces wear at the sliding contact with the inner shell 12, thus lowering costs.

[0067] In some optional embodiments, the inner shell 12 undergoes overall chemical heat treatment to achieve a surface hardness of HRC32-HRC37, while the valve core 211 undergoes overall chemical heat treatment to achieve a surface hardness of HRC38-HRC43. This reduces processing difficulty, and the surface hardness of the inner shell 12 effectively reduces wear at the sliding contact with the valve core 211, while ensuring appropriate brittleness of the inner shell 12 to prevent breakage. Simultaneously, the surface hardness of the valve core 211 effectively reduces wear at the sliding contact with the inner shell 12, lowering costs and facilitating mass production. Furthermore, the ratio of the surface hardness of the inner shell 12 to that of the valve core 211 can be ideally between 0.6 and 1.2, for example, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, etc. This ensures that the surface hardness of the inner shell 12 and the valve core 211 are relatively close and both high, effectively mitigating wear issues without causing excessively large differences that could lead to higher costs or increased breakage.

[0068] There are many specific embodiments to satisfy the requirement that "the inner shell 12 is chemically heat-treated as a whole and has a surface hardness of HRC32-HRC37, and the valve core 211 is chemically heat-treated as a whole and has a surface hardness of HRC38-HRC43". For example, three specific embodiments are described below, but the present invention is not limited to the following three specific embodiments.

[0069] Example 1

[0070] The inner shell 12 is made of SPCC, and the valve core 211 is made of SCM435. In order to improve the up-and-down vibration of the valve core 211 during the operation of the compressor 200, which causes friction and wear at the contact point between the valve core 211 and the inner shell 12, the inner shell 12 is subjected to soft nitriding treatment. The thickness of the white bright layer of the inner shell 12 after treatment is 3μm to 25μm, and the microstructure is composed of ε phase, γ` phase and nitrogen-containing cementite Fe3(C,N). The surface hardness of the inner shell 12 after chemical heat treatment is HRC32-HRC37, while the valve core 211 is subjected to quenching and tempering chemical heat treatment, and the surface hardness after treatment is HRC38 to HRC43.

[0071] Example 2

[0072] The inner shell 12 is made of SPCC, and the valve core 211 is made of SCM435. In order to improve the up-and-down vibration of the valve core 211 during the operation of the compressor 200, which causes friction and wear at the contact point between the valve core 211 and the inner shell 12, the inner shell 12 is subjected to carburizing chemical heat treatment. The carburizing layer depth is 0.2mm-1.2mm, and the carburized layer structure is martensite with high surface hardness plus retained austenite. The surface hardness of the inner shell 12 after chemical heat treatment is HRC32-HRC37, while the valve core 211 is subjected to quenching and tempering chemical heat treatment. The surface hardness of the valve core 211 after treatment is HRC38-HRC43.

[0073] Example 3

[0074] The inner shell 12 is made of SPCC, and the valve core 211 is made of SCM435. In order to improve the up-and-down vibration of the valve core 211 during the operation of the compressor 200, which causes friction and wear at the contact point between the valve core 211 and the inner shell 12, the inner shell 12 is subjected to carbonitriding treatment. The diffusion layer depth is 0.2mm-1mm. The diffusion layer structure consists of nitrogen-containing martensite, carbonitrides, alloy nitrides, and a small amount of retained austenite. The surface hardness of the inner shell 12 after chemical heat treatment is HRC32-HRC37, while the valve core 211 is subjected to quenching and tempering chemical heat treatment. The surface hardness of the valve core 211 after treatment is HRC38-HRC43.

[0075] Of course, the present invention is not limited to this. In the phrase "at least one of the valve core mating part 2110 and the inner shell mating part 120 is hardened to form a surface hardened layer on the corresponding mating surface", the "hardening treatment" is not limited to chemical heat treatment. For example, other processes such as electroplating and spraying can also be used to obtain the surface hardened layer.

[0076] For example, in some embodiments, the inner shell mating portion 120 is surface hardened by electroplating, that is, a surface hardened layer is formed on the mating surface of the inner shell mating portion 120 through an electroplating process. This improves processing flexibility, adapts to different production scenarios, and meets different practical requirements. Furthermore, it should be noted that electroplating can be performed only on a portion of the mating surface of the inner shell mating portion 120 of the inner shell 12, thereby reducing the processing area and process cost. Alternatively, electroplating can be performed on a large area including this portion; for example, optionally, the entire inner surface of the inner shell 12 can be electroplated; or alternatively, the entire inner shell 12 can be electroplated, that is, the entire surface of the inner shell 12 can be electroplated, thereby reducing processing difficulty.

[0077] For example, in some embodiments, the valve core mating portion 2110 is surface hardened by electroplating, that is, a surface hardened layer is formed on the mating surface of the valve core mating portion 2110 through an electroplating process. This improves processing flexibility, adapts to different production scenarios, and meets different practical requirements. Furthermore, it should be noted that electroplating can be performed only on the mating surface of the valve core mating portion 2110 of the valve core 211, thereby reducing the processing area and process cost. Alternatively, electroplating can be performed on a large area including this localized area. For example, optionally, the entire inner surface of the valve core 211 can be electroplated; or alternatively, the entire valve core 211 can be electroplated, that is, the entire surface of the valve core 211 can be electroplated, thereby reducing processing difficulty.

[0078] Furthermore, in some embodiments, both the inner shell mating portion 120 and the valve core mating portion 2110 may be surface-hardened through electroplating. Therefore, combined with the above two descriptions, this improves processing flexibility, adapts to different production scenarios, and meets various practical requirements. The specific selection of the electroplating area can be referred to the above two descriptions, and will not be elaborated upon here.

[0079] For example, in some embodiments, the inner shell mating portion 120 is surface-hardened by spraying, that is, a surface-hardened layer is formed on the mating surface of the inner shell mating portion 120 through a spraying process. This improves processing flexibility, adapts to different production scenarios, and meets different practical requirements. Furthermore, it should be noted that the spraying treatment can be performed only on a portion of the mating surface of the inner shell mating portion 120 of the inner shell 12, thereby reducing the processing area and process cost. Alternatively, a large area including this portion can be sprayed; for example, optionally, the entire inner surface of the inner shell 12 can be sprayed; or alternatively, the entire inner shell 12 can be sprayed, that is, the entire surface of the inner shell 12 can be sprayed, thereby reducing processing difficulty.

[0080] For example, in some embodiments, the valve core mating portion 2110 is surface-hardened by spraying, that is, a surface-hardened layer is formed on the mating surface of the valve core mating portion 2110 through a spraying process. This improves processing flexibility, adapts to different production scenarios, and meets different practical requirements. Furthermore, it should be noted that the spraying treatment can be performed only on a localized area of ​​the mating surface of the valve core mating portion 2110 of the valve core 211, thereby reducing the processing area and process cost. Alternatively, a large area including this localized area can be sprayed; for example, optionally, the entire inner surface of the valve core 211 can be sprayed; or alternatively, the entire valve core 211 can be sprayed, that is, the entire surface of the valve core 211 can be sprayed, thereby reducing processing difficulty.

[0081] Furthermore, in some embodiments, both the inner shell mating part 120 and the valve core mating part 2110 may be surface-hardened by spraying. Therefore, combined with the above two descriptions, this can better improve processing flexibility, adapt to different production scenarios, and meet different practical requirements. Moreover, the specific selection of the spraying area can be referred to the above two descriptions, and will not be elaborated here.

[0082] For example, in some embodiments, the inner shell 12 can be processed by chrome plating or diamond-like carbon (DLC) plating. The depth of the first electroplating layer is greater than 0.05 μm, and the surface hardness is in the range of HV250 to HV450, such as HV250, HV300, HV350, HV400, HV450, etc., which can effectively improve the wear problem of the inner shell 12 at the sliding fit.

[0083] In addition, it is worth noting that at least a portion of the inner shell 12 can be subjected to at least one and at least one hardening treatment. For example, it can be subjected to the same treatment process multiple times, or it can be subjected to different treatment processes multiple times. For example, at least a portion of the inner shell 12 can be subjected to chemical heat treatment, and then at least a portion of the inner shell 12 can be subjected to electroplating or spraying treatment, thereby obtaining better surface hardness through two hardening treatments. Even more hardening treatments can be performed, which will not be elaborated here.

[0084] In short, in some embodiments, at least the inner shell mating portion 120 of the inner shell 12 is hardened by at least one of the following methods: chemical heat treatment, electroplating, and spraying, so as to form a surface hardened layer at least on the mating surface of the inner shell mating portion 120, and / or, at least the valve core mating portion 2110 of the valve core 211 is hardened by at least one of the following methods: chemical heat treatment, electroplating, and spraying, so as to form a surface hardened layer at least on the mating surface of the valve core mating portion 2110, thereby meeting different practical requirements, which will not be listed or elaborated here.

[0085] In some alternative embodiments, such as Figure 2 and Figure 5 As shown, the valve core 211 may include a cylindrical section 2111 and a stop section 2112. The cylindrical section 2111 is coaxially arranged with the air inlet 111 and passes through the through hole 122. At least a portion of the cylindrical section 2111 is the valve core mating part 2110. The stop section 2112 is connected to the side of the cylindrical section 2111 near the air inlet 111 to restrict the valve core 2111 from dislodging from the through hole 122 of the inner shell 12. The elastic element 22 may be a cylindrical spring and sleeved on the cylindrical section 2111, thereby facilitating the acquisition and installation of the elastic element 22 and effectively reducing the problem of the elastic element 22 detaching from the valve core 211. This improves the working reliability of the elastic element 22. Of course, the present invention is not limited to this. For example, in other embodiments of the present invention, springs of other shapes or elastic air bags may be used instead of cylindrical springs.

[0086] In some alternative embodiments, such as Figure 2 and Figure 5As shown, the valve core unit 21 may also include a valve plate 212. The valve plate 212 is located on the side of the stop section 2112 away from the cylindrical section 2111. When projected onto the center line of the cylindrical section 2111, the projected area of ​​the valve plate 212 is larger than the projected area of ​​the stop section 2112, and the projected area of ​​the valve plate 212 is larger than the projected area of ​​the air inlet 111. Thus, the valve core 211 can close the air inlet 111 through the valve plate 212. Therefore, the size of the stop section 2112 of the valve core 211 can be minimized. The stop section 2112 only needs to restrict the valve core 211 from coming out of the through hole 122, and does not need to block and close the air inlet 111.

[0087] Furthermore, the connection method between valve plate 212 and valve core 211 is not limited, for example, in Figure 2 and Figure 5 In the specific example shown, a through hole can be provided on the valve plate 212, and a threaded hole can be provided on the valve core 211. A screw 23 passing through from the valve plate 212 to the valve core 211 can be used to connect the two, thus achieving a simple and effective reliable connection between the valve plate 212 and the valve core 211. Of course, the present invention is not limited to this. For example, in other embodiments of the present invention, the connection can also be achieved through welding, expansion joints, etc., which will not be elaborated here.

[0088] Hereinafter, with reference to the accompanying drawings, a compressor 200 according to a second aspect embodiment of the present invention will be described.

[0089] like Figures 1-3 As shown, the compressor 200 may include: a compressor housing 41, a drive assembly 42, a pump assembly 43, and a one-way valve 100. The drive assembly 42 and the pump assembly 43 are connected and both are disposed inside the compressor housing 41. The drive assembly 42 drives the pump assembly 43 to perform compression. The one-way valve 100 is a one-way valve 100 according to the first aspect embodiment of the present invention. The compressor 200 discharges gas in one direction through the one-way valve 100.

[0090] For example, in some embodiments, the one-way valve 100 may be disposed within the compressor housing 41 and directly or indirectly mounted on the compressor housing 41 to allow the compressor 200 to discharge in one direction. For example Figures 1-3 As shown, the compressor 200 can discharge air unidirectionally from the discharge position of the compressor 200 (e.g., at the discharge pipe 32 described later) through the one-way valve 100, without drawing air in the reverse direction from the discharge position of the compressor 200 (e.g., at the discharge pipe 32 described later) through the one-way valve 100.

[0091] Therefore, by providing the one-way valve 100 according to an embodiment of the present invention, the wear of the one-way valve 100 can be reduced, thereby improving the overall service life and reliability of the compressor 200.

[0092] Specifically, when the one-way valve 100 is used in the compressor 200, such as Figure 1 As shown, the one-way valve 100 may further include a valve housing 31 and an exhaust pipe 32. The exhaust pipe 32 is installed in the valve housing 31, which is located inside the compressor housing 41. A mounting cavity is formed between the valve seat 11 and the valve housing 31. The inner shell 12 is located within the mounting cavity. Gas discharged from the exhaust port enters the space formed between the valve housing 31 and the inner shell 12, and then exits through the exhaust pipe 32. The exhaust pipe 32 passes through the compressor housing 41, thereby allowing high-pressure gas inside the compressor 200 to be discharged unidirectionally to the outside of the compressor housing 41. This simplifies the structure, making the compressor 200 more compact, effectively protecting the one-way valve 100 from damage, facilitating installation, and reducing costs.

[0093] When compressor 200 is working, the high-pressure gas inside compressor housing 41 pushes open valve plate 212, and check valve 100 is in the open state. The high-pressure gas enters the inner cavity 13 of inner housing 12 through inlet port 111, then enters the receiving cavity of valve housing 31 through exhaust port, and is then discharged outside compressor housing 41 through exhaust pipe 32, realizing normal refrigeration cycle. When compressor 200 stops working, valve plate 212 closes inlet port 111 under the action of elastic element 22, and check valve 100 is in the closed state. Gas in inner cavity 13 cannot flow back into compressor housing 41 (i.e., the space inside compressor housing 41 excluding check valve 100) through inlet port 111, which helps compressor 200 quickly achieve pressure balance and meet the requirements of rapid restart. At the same time, it can prevent refrigerant from depositing inside the compressor 200, thus avoiding the decrease in lubricating oil viscosity caused by excessive refrigerant dissolving in the oil sump at the bottom of the compressor 200. This, in turn, prevents abnormal wear that might result from decreased lubricating oil viscosity inside the compressor 200 when the compressor 200 restarts, improving the reliability of the compressor 200. Furthermore, it can reduce heat loss and improve operating efficiency.

[0094] It should be noted that the specific type of compressor 200 is not limited. For example, in some embodiments, when the compressor 200 is a rotary compressor 200, the pump body assembly 43 may include a cylinder with a cylinder chamber and a piston inside the cylinder chamber. The specific configuration of the drive assembly 42 is not limited. For example, it may include a motor and a drive shaft. The motor may be an internal rotor motor or an external rotor motor. The rotor is connected to the drive shaft so that when the motor is working, the rotor drives the drive shaft to rotate. The drive shaft has an eccentric part, and the piston is sleeved on the eccentric part so that when the drive shaft rotates, the piston can roll along the cavity wall of the cylinder chamber. Furthermore, it should be noted that the specific configuration of the pump body assembly 43 is not limited to this. For example, in some embodiments, the cylinder assembly may further include bearings disposed on both sides of the cylinder, etc., which will not be elaborated here.

[0095] Additionally, it should be noted that the specific configuration of the compressor housing 41 according to embodiments of the present invention is not limited. For example, when the compressor 200 is a vertical compressor 200, the housing may include a main housing and an upper housing and a lower housing located at the upper and lower ends of the main housing. In this case, in some embodiments, the one-way valve 100 may be located on the upper housing, and the exhaust pipe 32 may pass through the upper housing. However, the present invention is not limited to this. When the compressor 200 is a horizontal compressor 200, the housing may include a main housing and a left housing and a right housing located at the left and right ends of the main housing. In this case, in some embodiments, the one-way valve 100 may be located at the top of the main housing, and the exhaust pipe 32 may pass through the main housing, etc., and so on. Examples will not be given here. According to some embodiments of the present invention, such as Figure 1 As shown, a process tube 44 can also be provided on the compressor housing 41. During production, the process tube 44 can be used for production processes such as oil sealing and vacuuming. This facilitates the processing of the compressor housing 41.

[0096] Hereinafter, with reference to the accompanying drawings, a liquid reservoir 300 according to a third aspect of the present invention will be described.

[0097] like Figures 4-6 As shown, the liquid reservoir 300 may include: a liquid reservoir housing 51, a gas-liquid separation component 52, and a one-way valve 100. The gas-liquid separation component 52 is disposed inside the liquid reservoir housing 51. The one-way valve 100 is a one-way valve 100 according to the first aspect embodiment of the present invention. The liquid reservoir 300 draws in gas in one direction through the one-way valve 100.

[0098] For example, in some embodiments, a one-way valve 100 is disposed within and installed in the reservoir housing 51 for one-way air intake of the reservoir 300. For example Figures 4-6 As shown, the reservoir 300 can draw in air unidirectionally from its air inlet position (e.g., the air inlet pipe 53 described later) via the one-way valve 100, without venting air in reverse direction from the air inlet position (e.g., the air inlet pipe 53 described later) via the one-way valve 100. Furthermore, the gas-liquid separation assembly 52 may include a filter screen, etc., and may be located upstream of the one-way valve 100.

[0099] The reservoir housing 51 is equipped with an inlet pipe 53 and an outlet pipe 54. A gas-liquid separation assembly 52 and a one-way valve 100 are sequentially arranged from the inlet pipe 53 to the outlet pipe 54. This allows the airflow to be processed by the gas-liquid separation assembly 52, opening the inlet port 111 of the one-way valve 100, and then exiting through the outlet port of the one-way valve 100 into the reservoir housing 51, and finally exiting through the outlet pipe 54. When the one-way valve 100 is closed, the airflow on the outlet pipe 54 side cannot flow backward through the inlet port 111 of the one-way valve 100 to the inlet pipe 53 side.

[0100] Therefore, by providing the one-way valve 100 according to an embodiment of the present invention, the wear of the one-way valve 100 can be reduced, thereby improving the overall service life and reliability of the reservoir 300.

[0101] Other configurations of the compressor 200 and liquid receiver 300 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. Additionally, in some embodiments, such as... Figure 1 As shown, the compressor 200 can be connected to the liquid receiver 300 via the suction pipe 45 to form a compressor assembly 1000. The compressor assembly 1000 can be applied to refrigeration equipment, such as refrigerators and air conditioners, which will not be described in detail here. Other configurations and operations of the refrigeration equipment according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0102] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0103] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0104] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0105] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0107] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A check valve for a compressor assembly, comprising: The compressor assembly comprises a compressor and a liquid accumulator, at least one of the compressor and the liquid accumulator is provided with the one-way valve, the one-way valve is adapted to allow the compressor to discharge in one direction and adapted to allow the liquid accumulator to suck in one direction, the one-way valve comprises: a valve housing assembly, the valve housing assembly comprises a valve seat and an inner housing, an inner cavity is defined between the valve seat and the inner housing, an inlet hole is formed on the valve seat and communicates with the inner cavity, an outlet hole is formed on the inner housing and communicates with the inner cavity; a valve core assembly, the valve core assembly comprises a valve core unit and an elastic element, the valve core unit comprises a valve core which is slidably arranged in the inner housing, the valve core unit is slidable relative to the inner housing between an open position which opens the inlet hole and a closed position which closes the inlet hole, the elastic element is arranged between the valve core unit and the valve housing assembly and provides the valve core unit with an elastic restoring force which is directed from the open position to the closed position; wherein, the part of the valve core which is in sliding fit with the inner housing is a valve core fit part, the part of the inner housing which is in sliding fit with the valve core is an inner housing fit part, at least one of the valve core fit part and the inner housing fit part is subjected to hardening treatment to form a surface hardening layer on at least the corresponding fit surface; the fit surface of the inner housing fit part is formed with a surface hardening layer and has a surface hardness A, the fit surface of the valve core fit part is formed with a surface hardening layer and has a surface hardness B, the ratio of A to B is 0.7-0.9; the fit surface of the inner housing fit part is formed with a surface hardening layer and has a surface hardness A of HRC32-HRC37, the fit surface of the valve core fit part is formed with a surface hardening layer and has a surface hardness B of HRC39-HRC43.

2. The check valve for a compressor assembly of claim 1, wherein, at least one of the inner housing fit part and the valve core fit part is subjected to chemical heat treatment to achieve surface hardening.

3. The check valve for a compressor assembly of claim 2, wherein, the material of the inner housing fit part is low-carbon steel and is subjected to nitriding process, or carbonitriding process, or carburizing heat treatment.

4. The check valve for a compressor assembly of claim 2, wherein, the material of the valve core fit part is alloy structural steel and is subjected to quenching and tempering heat treatment.

5. The check valve for a compressor assembly of claim 2, wherein, the whole inner housing is subjected to chemical heat treatment and has a surface hardness of HRC32-HRC37.

6. The check valve for a compressor assembly of claim 2, wherein, the whole valve core is subjected to chemical heat treatment and has a surface hardness of HRC38-HRC43.

7. The check valve for a compressor assembly of any of claims 1-6, wherein, at least one of the inner housing fit part and the valve core fit part is subjected to electroplating to achieve surface hardening.

8. The check valve for a compressor assembly of any of claims 1-6, wherein, at least one of the inner housing fit part and the valve core fit part is subjected to spraying to achieve surface hardening.

9. A compressor characterized by, comprises: a compressor housing, a drive assembly, a pump body assembly and a one-way valve, the drive assembly and the pump body assembly are connected and both are arranged in the compressor housing, the one-way valve is the one-way valve according to any one of claims 1-8, and the compressor discharges in one direction through the one-way valve.

10. A reservoir characterized by, comprises: a liquid accumulator housing, a gas-liquid separation assembly and a one-way valve, the gas-liquid separation assembly is arranged in the liquid accumulator housing, the one-way valve is the one-way valve according to any one of claims 1-8, and the liquid accumulator sucks in one direction through the one-way valve.

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