A valve group assembly and a compressor, a refrigerator having the same

Abstract

The application provides a valve group assembly, a compressor and a refrigerator with the valve group assembly. The valve group assembly comprises a suction valve plate and a valve plate. The suction valve plate comprises a valve plate body and a suction valve. The suction valve corresponds to a suction port on the valve plate and can close or open the suction port. The suction valve comprises a head and an arm. The arm comprises a root and a waist. The waist is formed with a neck-in structure. The neck-in structure has a smaller width and a larger length, which increases the lifting height of the suction valve, ensures sufficient effective flow area, and increases high-frequency refrigerating capacity. The suction valve comprises a first suction valve, a second suction valve and a third suction valve arranged in sequence. The stiffness and the natural frequency of the suction valves are different, which improves the response speed, takes into account the low-frequency performance and the high-frequency refrigerating capacity, and achieves a relatively optimal suction efficiency. When the compressor operates at a low frequency, the performance is excellent. When the compressor operates at a high frequency, the fixed displacement compressor can realize higher refrigerating capacity. The roots of the suction valves are connected with the valve plate body respectively, which improves the stress distribution and reduces vibration noise.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of refrigerator equipment, and particularly relates to a valve group assembly, a compressor and a refrigerator with the valve group assembly. BACKGROUND

[0002] The suction efficiency of the compressor is related to the structure of the suction valve group. The existing valve group usually adopts a single suction valve with high reliability. However, the head part with large mass and the arm part with short and fat shape in the suction valve are not suitable, which causes slow response speed of the suction valve, delay of opening and closing of the suction port, and refrigerant backflow phenomenon, greatly restricting the energy efficiency of the compressor. Some people propose to use a valve group assembly with three suction valves. The natural frequencies of the three suction valves are different, which can adapt to the operation of the compressor at different frequencies. However, the valve group has the following disadvantages: the arm part of the suction valve is wide and short, the lifting height of the suction valve is limited during high-frequency operation of the compressor, and the cold quantity improvement effect is not obvious; the hollow part between the suction valves has large residual volume, and the three suction valves share the root part, which can easily cause stress concentration and poor reliability. SUMMARY

[0003] The present application provides a valve group assembly, a compressor and a refrigerator with the valve group assembly, to solve the problems of slow response speed of the suction valve, limited lifting height of the suction valve during operation, low intake volume and poor energy efficiency of the compressor in the prior art.

[0004] The present application provides a valve group assembly, which comprises a suction valve sheet and a valve plate matched with the suction valve sheet; the suction valve sheet comprises a valve sheet body and a suction valve arranged on the valve sheet body; the valve plate is provided with a suction port corresponding to the suction valve, and the suction valve is used for closing or opening the suction port;

[0005] The suction valve comprises a head part and an arm part, the head part is used for closing and opening the suction port, and the arm part is used for connecting the valve sheet body and the head part;

[0006] The arm part has a maximum width W2 at the tail end connected to the valve sheet body, and has a minimum width W1 between the valve sheet body and the head part;

[0007] Supposing that the maximum width of the head part is 2R, the distance between the center of the head part and the minimum width position of the arm part is L1, and the distance between the minimum width position of the arm part and the maximum width position of the arm part is L2; the distance from the center of the head part to the tail end of the arm part is L, L=L1+L2;

[0008] The R, W1, W2, L1 and L2 satisfy the following relationship:

[0009] 1.3<2R:W1<4; 0.39<2R:W2<0.87;

[0010] 0.9 < L1:R < 3.1; 1.2 < L2:R < 5.

[0011] Further optionally, the R, W1, W2, L1, L2 satisfy the following relationship:

[0012] 1.0 < 2R:W1 < 3; 0.29 < 2R:W2 < 0.77;

[0013] 0.6 < L1:R < 2.1; 0.8 < L2:R < 4.

[0014] Further optionally, the arm portion includes a root connected with the valve plate body and a waist connected between the root and the head; the root forms a tail end connected with the valve plate body, and the waist forms a necked structure connecting the root and the head.

[0015] The width of both ends of the necked structure is greater than the width of the middle of the necked structure; and the length of the necked structure is greater than the length of the head and the length of the root.

[0016] Further optionally, the suction valve is an axisymmetric structure, and the profile line thereof includes a first profile line A1A2, a second profile line A1B1 connected with one end of the first profile line A1A2, a third profile line B1C1 connected with the second profile line A1B1, a fourth profile line A2B2 connected with the other end of the first profile line A1A2, and a fifth profile line B2C2 connected with the fourth profile line A2B2.

[0017] The first profile line A1A2 is tangent to the second profile line A1B1 and the fourth profile line A2B2; the third profile line B1C1 is tangent to the second profile line A1B1; and the fifth profile line B2C2 is tangent to the fourth profile line A2B2.

[0018] The first profile line A1A2, the second profile line A1B1, and the fourth profile line A2B2 are arc lines; and the third profile line B1C1 and the fifth profile line B2C2 are arc lines or straight lines.

[0019] The first profile line A1A2 is a head profile line; the second profile line A1B1 and the fourth profile line A2B2 are waist profile lines; and the second profile line B1C1 and the fifth profile line B2C2 are root profile lines.

[0020] Further optionally, the central angle of the first profile line A1A2 is θ1, the central angle of the second profile line A1B1 and the fourth profile line A2B2 is θ2, and the third profile line B1C1 and the fifth profile line B2C2 are arc-shaped and have a central angle of θ3; wherein,

[0021] 210° < θ1 < 306°, 88° < θ2 < 128°, and 15° < θ3 < 22°.

[0022] Further optionally, the air suction valve comprises a first air suction valve, a second air suction valve and a third air suction valve arranged in sequence, the stiffness and natural frequency of which are different; the first air suction valve and the third air suction valve are symmetrically arranged on both sides of the second air suction valve, and the symmetry axis of the first air suction valve and the symmetry axis of the third air suction valve are both arranged obliquely relative to the symmetry axis of the second air suction valve.

[0023] Further optionally, the root of the first air suction valve, the root of the second air suction valve and the root of the third air suction valve are respectively connected with the valve plate body and are all located on one side of the valve plate body.

[0024] The root of the first air suction valve and the root of the third air suction valve are away from the root of the second air suction valve.

[0025] Further optionally, the head of the first air suction valve, the head of the second air suction valve and the head of the third air suction valve are all located on the other side of the valve plate body.

[0026] The head of the first air suction valve and the head of the third air suction valve are respectively arranged on both sides of the necking structure of the second air suction valve.

[0027] Further optionally, the valve plate body is provided with a first exhaust port, and correspondingly, the valve plate is provided with a second exhaust port, and the first exhaust port and the second exhaust port are communicated.

[0028] The first exhaust port is arranged at the root of the second air suction valve.

[0029] Further optionally, the first air suction valve, the second air suction valve and the third air suction valve are equal in spacing between the remaining part and the tail end of the valve plate body.

[0030] The application further provides a compressor with the valve group assembly.

[0031] The application further provides a refrigerator with the valve group assembly.

[0032] The application provides a valve group assembly, which comprises an air suction valve sheet and a valve plate, the air suction valve sheet comprises a valve sheet body and an air suction valve, the air suction valve corresponds to an air suction port on the valve plate and can close or open the air suction port; the air suction valve comprises a head part and an arm part, the arm part comprises a root part connected with the valve sheet body and a waist part connected between the root part and the head part; the waist part forms a necked structure connecting the root part and the head part; the air suction valve comprises a first air suction valve, a second air suction valve and a third air suction valve arranged in sequence, and the stiffness and the natural frequency of the three are different, the equivalent mass of a single air suction valve can be reduced, the response speed is improved, the low-frequency performance and the high-frequency cold capacity are considered, the air suction efficiency is better, the demand of the compressor for different cold capacities and operating frequencies can be met, when the valve group assembly is applied to the compressor, the compressor can operate in the frequency range of 16-150 Hz, the performance is good when operating at low frequency, and the fixed displacement compressor can realize higher refrigerating capacity, so that the power density of the compressor is improved, the refrigerating capacity at low evaporation temperature (for example, -35℃ to -50℃) is improved, and the deep freezing function of the refrigerator is realized; the necked structure has a smaller width and a larger length, the lifting height of the air suction valve is increased, the effective flow area is ensured when operating at high frequency, and the high-frequency refrigerating capacity is further increased; the root parts of the air suction valves are connected with the valve sheet body respectively, the stress distribution is improved, the reliability of the valve sheet is increased, and the vibration noise is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0034] The structures, proportions, sizes and the like shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not have technical significance to limit the conditions that the present application can be implemented, so any modification of the structure, change of the proportion relationship or adjustment of the size, which does not affect the effect and the purpose that the present application can produce, should still fall within the scope of the technical content disclosed by the present application.

[0035] Figure 1a 、 Figure 1b and Figure 1c The structure schematic diagram of the air suction valve sheet provided by the present application is shown in the following figure;

[0036] Figure 2 The structure schematic diagram of the valve plate provided by the present application is shown in the following figure;

[0037] Figure 3a and Figure 3bA valve group assembly embodiment structure schematic diagram provided by the present application;

[0038] Figure 4a A three-suction valve (long arm) and a conventional single-suction valve experimental data comparison curve provided by the present application;

[0039] Figure 4b A three-suction valve (long arm), three-suction valve (ordinary) and conventional single-suction valve experimental data comparison curve provided by the present application;

[0040] In the figure:

[0041] 1 - suction valve plate; 11 - valve plate body; 111 - first exhaust port; 12 - suction valve; 121 - first suction valve; 122 - second suction valve; 123 - third suction valve; 124 - head; 125 - neck structure; 126 - root; 13 - air hole; 14 - mounting hole;

[0042] 2 - valve plate; 21 - suction port; 211 - first suction port; 212 - second suction port; 213 - third suction port; 22 - groove; 23 - second exhaust port;

[0043] 3 - exhaust valve plate;

[0044] 4 - lift limiter. DETAILED DESCRIPTION

[0045] The embodiments of the present application are described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0046] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "Multiple" generally includes at least two, but does not exclude the case of including at least one.

[0047] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0048] It is also to be understood that the terminology "include", "includes" or any other variation thereof is used inclusively and not exclusively, so that, for example, a product or system that includes a list of elements does not exclude the presence of other elements not specifically listed, or the presence of elements inherent to such product or system. An element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the product or system including the element in question, unless otherwise limited.

[0049] The prior art improves the response speed of the suction valve by designing three suction valves to avoid the phenomenon of refrigerant backflow; however, the arm part of the suction valve has a large width and a small length, the lifting height of the suction valve is limited when the compressor is operated at a high frequency, the cold capacity improvement effect is not obvious, the stress is easily concentrated at the root of the three suction valves sharing the valve gap, and the reliability is poor; the application creatively provides a valve group assembly, the valve group assembly comprises a suction valve sheet and a valve plate; the suction valve sheet comprises a valve sheet body and a suction valve arranged on the valve sheet body; the valve plate is provided with a suction port, and the suction valve can close or open the suction port; the suction valve comprises a head part and an arm part, the head part is used for closing and opening the suction port, and the arm part is used for connecting the valve sheet body and the head part; there is a proportional relationship between the structure size of the head part and the structure size of the arm part, so that the response speed of the suction valve is fast, and the phenomenon of refrigerant backflow is avoided; when the compressor is operated at a high frequency, the lifting height of the suction valve is increased, the sufficient effective flow area is ensured, and the refrigerating capacity is further increased.

[0050] As shown in Figure 1a , Figure 1b , Figure 1c , Figure 2 , Figure 3a and Figure 3b , the embodiment provides a valve group assembly, the valve group assembly comprises a suction valve sheet 1 and a valve plate 2 matched with the suction valve sheet 1; the suction valve sheet 1 comprises a valve sheet body 11 and a suction valve 12 arranged on the valve sheet body 11; the valve plate 2 is provided with a suction port 21 corresponding to the suction valve 12, and the suction valve 12 can close or open the suction port 21; specifically, the suction valve sheet 1 is integrally formed by using a flexible material;

[0051] The suction valve 12 comprises a head part 124 and an arm part, the head part 124 is used for closing and opening the suction port 21, and the arm part is used for connecting the valve sheet body 11 and the head part 124;

[0052] The arm part has a maximum width W2 at the tail end connected to the valve sheet body 11, and has a minimum width W1 between the valve sheet body 11 and the head part 124;

[0053] The maximum width of the head 124 is 2R, the distance from the center of the head 124 to the minimum width position of the arm is L1, and the distance from the minimum width position of the arm to the maximum width position of the arm is L2; the distance from the center of the head 124 to the tail end of the arm is L, L=L1+L2;

[0054] R, W1, W2, L1, L2 satisfy the following relationship:

[0055] 1.3<2R:W1<4; 0.39<2R:W2<0.87;

[0056] 0.9<L1:R<3.1; 1.2<L2:R<5.

[0057] Preferably, R, W1, W2, L1, L2 satisfy the following relationship:

[0058] 1.0<2R:W1<3; 0.29<2R:W2<0.77;

[0059] 0.6<L1:R<2.1; 0.8<L2:R<4.

[0060] In addition, there is a proportional relationship between 2R, W1 and W2, and a proportional relationship between R, L1 and L2, so that the structure of the head of the suction valve and the structure of the arm are adapted, the structure of the suction valve is optimized, the response speed of the suction valve is improved when the compressor is operated at high frequency, and the refrigerant backflow is avoided; the lifting height of the suction valve is increased, sufficient effective flow area is ensured, and the refrigerating capacity of the compressor is ensured.

[0061] Further, the arm includes a root 126 connected with the valve piece body 11 and a waist 127 connected between the root 126 and the head 124; the root 126 forms a connection with the tail end of the valve piece body 11, and the waist 127 forms a necking structure 125 connecting the root 126 and the head 124; the transition hole is provided at the connection between the root 126 and the valve piece body 11, and the transition hole is in the shape of a waist circle.

[0062] In order to make the suction valve 12 lift high enough when the compressor is running at high frequency, thereby increasing the effective flow area and ensuring the refrigerating capacity, the width of the two ends of the necked structure 125 is greater than the width of the middle of the necked structure 125; the length of the necked structure 125 is greater than the length of the head 124 and the length of the root 126; when the compressor is running, the suction valve 12 responds in time and lifts to a certain height, the suction port 21 is opened, and then the refrigerant passes smoothly; compared with a conventional single suction valve, the length of the necked structure 125 of the suction valve 12 is greater and the width of the necked structure 125 is smaller, which can effectively reduce the opening difficulty of the suction valve 12, improve the stress distribution of the suction valve 12, and ensure the effective flow area of the valve group, that is, the suction valve 12 lifts high enough, does not affect the single cycle suction volume, and improves the refrigerating capacity; the mass of the head 124 is reduced, the suction valve 12 has a large natural frequency and appropriate stiffness, the response speed is improved, the backflow phenomenon caused by the delay of the opening and closing time of the suction valve 12 during the running of the compressor is improved, the flow resistance is reduced, the suction volume and volumetric efficiency of the compressor are improved; stress concentration at the root 126 and fracture of the suction valve 12 are avoided, and the reliability of the suction valve 12 is improved.

[0063] Preferably, the head 124 is a fan-shaped structure, the length of the suction valve 12 is L, the minimum width of the necked structure 125 is W, the radius of the head 124 is R, 4.5≤L / R≤7.5, and 0.6≤W / R≤1.2; specifically, the length of the suction valve 12 is the vertical distance from the center point of the head 124 to the root 126 and the end surface of the valve piece body 11.

[0064] In order to improve the response speed of the suction valve 12, the necked structure 125 includes a gradually decreasing width section and a gradually increasing width section in the direction from the head 124 to the root 126; specifically, the width of the necked structure 125 decreases first and then increases in the direction from the head 124 to the root 126, and the two sides of the necked structure 125 are circular arc structures, that is, the head 124 is transitioned to the root 126 through a circular arc.

[0065] Further, the suction valve 12 is an axisymmetric structure, and the profile line thereof includes a first profile line A1A2, a second profile line A1B1 connected to one end of the first profile line A1A2, a third profile line B1C1 connected to the second profile line A1B1, a fourth profile line A2B2 connected to the other end of the first profile line A1A2, and a fifth profile line B2C2 connected to the fourth profile line A2B2;

[0066] The first profile line A1A2 is tangent to the second profile line A1B1 and the fourth profile line A2B2; the third profile line B1C1 is tangent to the second profile line A1B1; and the fifth profile line B2C2 is tangent to the fourth profile line A2B2;

[0067] The first profile line A1A2, the second profile line A1B1, and the fourth profile line A2B2 are arc lines; the third profile line B1C1 and the fifth profile line B2C2 are arc lines or straight lines;

[0068] The first profile A1A2 is a head profile; the second profile A1B1 and the fourth profile A2B2 are waist profiles, and the second profile B1C1 and the fifth profile B2C2 are root profiles.

[0069] Preferably, the central angle of the first profile A1A2 is θ1, the central angles of the second profile A1B1 and the fourth profile A2B2 are both θ2, and the third profile B1C1 and the fifth profile B2C2 are arc-shaped and have a central angle of θ3; wherein,

[0070] 210°<θ1<306°, 88°<θ2<128°, 15°<θ3<22°.

[0071] In view of the problems of large equivalent mass and slow response speed of the conventional single suction valve in the prior art, in the embodiment, the suction valve 12 comprises a first suction valve 121, a second suction valve 122 and a third suction valve 123 arranged in sequence, and all are waist-shaped axisymmetric structures; the first suction valve 121 and the third suction valve 123 are symmetrically arranged on the two sides of the second suction valve 122, and the symmetry axes of the first suction valve 121 and the third suction valve 123 are both arranged obliquely relative to the symmetry axis of the second suction valve 122; specifically, the symmetry axis of the second suction valve 122 passes through the center of the valve plate body 11, the root of the second suction valve 122 is arranged on the upper side of the valve plate body 11, and the head of the second suction valve 122 is arranged on the lower side of the valve plate body 11; the first suction valve 121 is arranged on the left side of the second suction valve 122, and the third suction valve 123 is arranged on the right side of the second suction valve 122; when applied to a wide-frequency compressor, different cooling capacities can be matched, so that a small-displacement compressor realizes large-displacement refrigeration capacity, thereby improving the power density of the compressor; the single suction amount is ensured, and the phenomenon of refrigerant backflow caused by the opening and closing delay of the suction valve is improved.

[0072] By arranging three suction valves 12 with different stiffness and different natural frequencies, different numbers of suction valves 12 are opened in different operating frequencies during the operation of the compressor; when the compressor operates at a low frequency, the suction valve 12 with small stiffness is opened; when the compressor operates at a high frequency, the suction valve 12 with large stiffness is opened, so that the suction valve 12 adapts to different operating frequencies, or when the compressor operates within a certain frequency range, the three suction valves can be opened at the same time, thereby ensuring the required suction amount of the compressor during operation and improving the energy efficiency of the compressor.

[0073] In order to improve the stress distribution of the root of the suction valve 12 and the connection of the valve body 11 and reduce the vibration noise of the suction valve 1, the root of the first suction valve 121, the root of the second suction valve 122 and the root of the third suction valve 123 are connected with the valve body 11 and located on one side of the valve body 11; the root of the first suction valve 121 and the root of the third suction valve 123 are away from the root of the second suction valve 122; specifically, the root of the first suction valve 121, the root of the second suction valve 122 and the root of the third suction valve 123 are all located on the upper side of the valve body 11, and the root of the first suction valve 121 is located on the upper left of the root of the second suction valve 122, and the root of the third suction valve 123 is located on the upper right of the root of the second suction valve 122, so that the roots of the first suction valve 121, the second suction valve 122 and the third suction valve 123 are connected with different positions of the valve body, on the one hand, the stress at the connection of the root and the valve body 11 is uniformly distributed, effectively improving the air flow noise of the compressor operation, ensuring the reliable operation of the suction valve, on the other hand, the three suction valves 12 do not affect each other during operation, the three suction valves 12 have different stiffness and natural frequency, and produce higher cooling capacity than the conventional single suction valve during high-frequency operation of the compressor, and the low-frequency performance and high-frequency cooling capacity are considered.

[0074] In order to make the suction port 21 continuous during the operation of the compressor, the head of the first suction valve 121, the head of the second suction valve 122 and the head of the third suction valve 123 are located on the other side of the valve body 11, and the head of the first suction valve 121 and the head of the third suction valve 123 are respectively arranged on both sides of the neck structure of the second suction valve 122, the suction port 21 is arranged staggered, which maximizes the use of the space layout of the valve body 11, can increase the area of the suction port 21, and is beneficial to increase the suction amount of the compressor; specifically, the head of the first suction valve 121 is located on the left side of the neck structure of the second suction valve 122, and the head of the third suction valve 123 is located on the right side of the neck structure of the second suction valve 122; during the operation of the compressor, the head of the first suction valve 121, the head of the second suction valve 122 and the head of the third suction valve 123 can be lifted synchronously or asynchronously, so that the suction port 21 has a higher effective flow area.

[0075] The suction port 21 on the valve plate 2 includes a first suction port 211, a second suction port 212, and a third suction port 213, which are respectively in communication with the head of the first suction valve 121, the head of the second suction valve 122, and the head of the third suction valve 123; when the head of the suction valve 12 is lifted, the corresponding suction port 21 is opened; when the head of the suction valve 12 falls, the corresponding suction port 21 is closed; the suction port 21 on the valve plate 2 is provided with an equal-width annular groove on the side end face corresponding to the suction valve 12, which is used to ensure that the suction valve 12 has sufficient sealing distance, reduce the contact area between the suction valve 12 and the end face of the suction port 21 on the valve plate 2, and is conducive to the rapid lifting of the suction valve 12, and the timely opening or closing of the suction port 21 on the valve plate 2.

[0076] Specifically, when the first suction port 211 is closed, the head of the first suction valve 121 falls on the suction port end face at the first suction port 211, so that the first suction port 211 is completely covered, and no refrigerant leaks; when the first suction valve 121 is lifted due to the pressure difference, the first suction port 211 is opened, the head of the first suction valve 121 is away from the suction port end face at the first suction port 211, and the refrigerant enters the first suction port 211 from the space between the head of the first suction valve 121 and the suction port end face at the first suction port 211.

[0077] Further, the suction port 21 on the valve plate 2 is provided with a flow guide slope away from one side of the suction valve sheet 1; specifically, the flow guide slope is arc-shaped, which is used for suction flow guide, reduces flow loss, and improves suction efficiency.

[0078] It should be noted that the number of suction valves 12 is not limited, and multiple suction valves 12 can be provided according to actual needs, and correspondingly, multiple suction ports 21 can be provided on the valve plate 2, and the cross-sectional shape of the suction port 21 is not limited and can be other shapes.

[0079] In some embodiments, the valve sheet body 11 is provided with a first exhaust port 111, and correspondingly, the valve plate 2 is provided with a second exhaust port 23, the first exhaust port 111 and the second exhaust port 23 are in communication, and the refrigerant can be smoothly discharged from the second exhaust port 23 and the first exhaust port 111; preferably, the first exhaust port 111 is arranged at the root of the second suction valve 122, which further improves the exhaust capacity and avoids stress concentration at the root; when the suction valve 12 is installed, the first suction valve 121, the second suction valve 122, the third suction valve 123, and the first exhaust port 111 are all arranged inside the corresponding cylinder bore position of the suction valve sheet 1, which can maximize the utilization of the cylinder bore area.

[0080] In the embodiment, the first exhaust port 111, the second exhaust port 23 and the air inlet port 21 are all circular, ensuring smooth air intake, making the air intake valve 12 bear force more evenly, avoiding deformation of the valve plate 2, improving air intake efficiency, reducing air intake resistance and improving effective air intake volume; the first exhaust port 111, the second exhaust port 23 and the air inlet port 21 are separately arranged, avoiding mutual interference in the air intake and exhaust process and improving air intake and exhaust efficiency.

[0081] The valve plate body 11 is further provided with a vent hole 13 in communication with a gas hole of the cylinder base for discharging compressed gas in the cylinder cover cavity to the next exhaust muffling cavity; the valve plate body 11 is further provided with mounting holes 14 at four corners for connecting the valve plate 2 and the air intake valve plate 1 and realizing fixation and pre-tightening between the valve group assembly and the cylinder cover.

[0082] In order to enable the compressor to operate with independent action of each air intake valve without mutual influence and timely response, the first air intake valve 121, the second air intake valve 122 and the third air intake valve 123 have equal spacing between the remaining parts and the valve plate body 11 except the tail end of the valve plate body 11, and the first air intake valve 121, the second air intake valve 122 and the third air intake valve 123 are not in contact with each other; specifically, the head of the first air intake valve 121, the head of the third air intake valve 123 and the necked structure of the second air intake valve 122 are not in contact.

[0083] Further, the thickness of the first air intake valve 121, the second air intake valve 122 and the third air intake valve 123 is h, wherein 0.076mm≤h≤0.203mm; preferably, h=0.178mm.

[0084] In some embodiments, the length of the first air intake valve 121 on its own symmetry axis, the length of the third air intake valve 123 on its own symmetry axis are both greater than the length of the second air intake valve 122 on its own symmetry axis.

[0085] The valve group assembly further comprises an exhaust valve plate 3 and a lift limiter 4, and the air intake valve plate 1, the valve plate 2, the exhaust valve plate 3 and the lift limiter 4 are sequentially arranged; the valve plate 2 is formed with a groove 22, and the groove 22 is formed with a first limiting structure and a second limiting structure for positioning the exhaust valve plate 3 and the lift limiter 4 respectively; the valve group assembly is installed on the end face of the compressor cylinder bore, the air intake valve plate 1 is arranged on the side close to the cylinder base, and the lift limiter 4 is arranged on the inner side close to the cylinder cover; the lift limiter 4 can fix the tail of the exhaust valve plate 3, control the lifting height of the exhaust valve plate 3 and ensure the exhaust flow area; the components are connected by fasteners, and the air intake valve plate 1 and the valve plate 2 are in communication, ensuring tight fit during assembly.

[0086] The second exhaust port 23 on the valve plate 2 is provided with an equal-width annular groove on the side end face corresponding to the exhaust valve plate 3, the exhaust valve plate 3 covers and seals the second exhaust port 23, the contact area between the exhaust valve plate 3 and the end face of the second exhaust port 23 on the valve plate 2 is reduced, which is beneficial to the rapid lifting of the exhaust valve plate 3, and the second exhaust port 23 on the valve plate 2 is timely opened or closed.

[0087] The working principle of the valve group assembly is as follows: during suction, the first suction valve 121, the second suction valve 122 and the third suction valve 123 are opened, and the refrigerant enters the compressor through the first suction port 211, the second suction port 212 and the third suction port 213; during exhaust, the first suction valve 121, the second suction valve 122 and the third suction valve 123 are closed, and the refrigerant is exhausted from the compressor through the second exhaust port 23 and the first exhaust port 111.

[0088] As shown in Figure 4a , the valve group of the three suction valves (long arms) in the embodiment is compared with the valve group of the conventional single suction valve through experiments, and it is found that, as the operating frequency of the compressor gradually increases, the compressor volumetric efficiency of the three suction valves (long arms) and the conventional single suction valve first increases and then decreases, and when the operating frequency is medium and high, the compressor volumetric efficiency of the three suction valves (long arms) is greater than that of the conventional single suction valve. Figure 4b As shown in , the valve group of the three suction valves (long arms) in the embodiment, the valve group of the three suction valves (ordinary), and the valve group of the conventional single suction valve are compared through experiments, and it is found that, as the operating frequency of the compressor gradually increases, the compressor volumetric efficiency of the three suction valves (long arms), the three suction valves (ordinary) and the conventional single suction valve first increases and then decreases, and when the operating frequency is medium and high, the compressor volumetric efficiency of the three suction valves (long arms) is greater than that of the three suction valves (ordinary), and the compressor volumetric efficiency of the three suction valves (ordinary) is greater than that of the conventional single suction valve.

[0089] The main reason for the above experimental results is that the suction valve plate 1 has a fast response speed and a high suction efficiency, and the necked structure 125 of the suction valve 12 has a long length and a narrow width, which can ensure sufficient effective flow area at high frequency, thereby improving the high-frequency refrigerating capacity; in addition, the valve group assembly in the embodiment is used, the diameter of the single suction port is reduced, the suction valve 12 bears less force, the service life is improved, the aerodynamic noise of the compressor is reduced, the fixed displacement compressor can operate in a wide operating frequency (16-150 Hz) range, the low-frequency performance is ensured, the refrigerating capacity at high frequency can be larger, the power density of the compressor is improved, and the refrigerating capacity of the compressor at low evaporation temperature (such as-35℃ to-50℃) is improved, and the deep freezing function of the refrigerator is realized.

[0090] The exemplary embodiments of this disclosure are specifically illustrated and described herein. But, it is to be understood that the disclosure is not limited to the detailed construction, arrangements, or implementation methods described herein; rather, the disclosure is intended to cover any and all modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A valve assembly, characterized in that, The valve assembly includes an intake valve plate and a valve plate that cooperates with the intake valve plate; the intake valve plate includes a valve plate body and an intake valve disposed on the valve plate body; the valve plate is provided with an intake port corresponding to the intake valve, and the intake valve is used to close or open the intake port; The intake valve includes a head and an arm. The head is used to close and open the intake port, and the head has a fan-shaped structure. The arm is used to connect the valve plate body and the head. The arm has a maximum width W2 at the tail end that connects to the valve plate body, and a minimum width W1 at the part that connects the valve plate body and the head. Let the maximum width of the head be 2R, the distance from the center of the head to the minimum width of the arm be L1, the distance from the minimum width of the arm to the maximum width of the arm be L2, and the distance from the center of the head to the tail be L, where L = L1 + L2. The following relationship is satisfied between R, W1, W2, L1, and L2: 1.3<2R / W1<4; 0.39<2R / W2<0.87; 0.9 < L1 / R < 3.1; 1.2 < L2 / R < 5; or, The following relationship is satisfied between R, W1, W2, L1, and L2: 1.0<2R / W1<3; 0.29<2R / W2<0.77; 0.6<L1 / R<2.1; 0.8<L2 / R<4.

2. The valve assembly according to claim 1, characterized in that, The arm includes a root portion connected to the valve plate body and a waist portion connected between the root portion and the head; the root portion forms a tail end connected to the valve plate body, and the waist portion forms a constricted structure connecting the root portion and the head.

3. The valve assembly according to claim 2, characterized in that, The intake valve has an axisymmetric structure, and its profile includes a first profile A1A2, a second profile A1B1 and a third profile B1C1 connected to one end of the first profile A1A2 in sequence, and a fourth profile A2B2 and a fifth profile B2C2 connected to the other end of the first profile A1A2 in sequence. The first type line A1A2 is tangent to the second type line A1B1 and the fourth type line A2B2, respectively; the third type line B1C1 is tangent to the second type line A1B1; and the fifth type line B2C2 is tangent to the fourth type line A2B2. The first type line A1A2, the second type line A1B1, and the fourth type line A2B2 are arcs; the third type line B1C1 and the fifth type line B2C2 are either arcs or straight lines. The first profile A1A2 is the head profile; the second profile A1B1 and the fourth profile A2B2 are the waist profiles; and the third profile B1C1 and the fifth profile B2C2 are the root profiles.

4. The valve assembly according to claim 3, characterized in that, The central angle of the first type line A1A2 is θ1, the central angles of the second type line A1B1 and the fourth type line A2B2 are both θ2, and the third type line B1C1 and the fifth type line B2C2 are arcs with a central angle of θ3; wherein... 210°<θ1<306°, 88°<θ2<128°, 15°<θ3<22°.

5. A compressor, characterized in that, It has a valve assembly as described in any one of claims 1-4.

6. A refrigerator, characterized in that, It has a valve assembly as described in any one of claims 1-4.

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