Suction valve, valve group assembly, piston compressor, refrigerator

Abstract

The utility model provides a kind of suction valve piece, valve group assembly, piston compressor, refrigerator, wherein suction valve piece, including suction valve piece body, multiple exhaust through holes are structured with the both sides end faces of suction valve piece body, first suction tongue spring, second suction tongue spring and third suction tongue spring are also formed on suction valve piece body, first suction tongue spring and third suction tongue spring are respectively at the left and right sides of second suction tongue spring, each exhaust through hole is on the area where the tongue root of second suction tongue spring is located, and between the area where the tongue root of first suction tongue spring and third suction tongue spring is located.This utility model can make the length of the tongue arm of first suction tongue spring and third suction tongue spring can be lengthened while ensuring the construction purpose of multiple exhaust through holes, so that the length difference of the tongue arm of first suction tongue spring and third suction tongue spring and the tongue arm length of second suction tongue spring is larger, and then the stiffness difference value of first suction tongue spring and third suction tongue spring and second suction tongue spring is increased.

Description

Technical Field

[0001] This utility model belongs to the field of compressor design technology, specifically relating to an intake valve plate, valve assembly, piston compressor, and refrigerator. Background Technology

[0002] The valve assembly is one of the core components of a compressor. Its quality not only affects the compressor's performance but also its noise and reliability. Current reciprocating compressors typically employ a valve assembly with one intake port and one exhaust port. However, with increasing demands for compressor energy efficiency and wider-frequency, higher-speed operation, the existing intake and exhaust structures are no longer sufficient. Existing single-hole valve plates have a large equivalent mass and slow response speed. During high-speed operation, the valve plate experiences significant impact stress, leading to abnormal valve plate reliability and noise issues, making it difficult to achieve high-efficiency operation across a wide frequency range.

[0003] To overcome the aforementioned technical deficiencies, the applicant proposed a valve assembly in invention application No. 201910951430.4. Specifically, a valve assembly with a three-hole independent intake and exhaust scheme was designed to achieve independent design of the stiffness and natural frequency of the three intake valve plates, ensuring that the compressor valve plates can respond quickly from low frequency to high frequency, improving the compressor intake efficiency and the reliability of the valve. However, the design of the relative position of each intake tongue spring to the exhaust port is not reasonable enough, resulting in a relatively small difference in stiffness among the tongue springs. Utility Model Content

[0004] Therefore, this utility model provides an intake valve plate, valve assembly, piston compressor, and refrigerator, which can overcome the technical problem in the related art where the relative position design of multiple intake tongues on the intake valve plate and their exhaust ports is not reasonable, resulting in relatively small differences in the stiffness of each tongue.

[0005] To address the aforementioned problems, this utility model provides an intake valve plate, comprising an intake valve plate body. The intake valve plate body has multiple exhaust holes penetrating its two end faces. The intake valve plate body also has a first intake tongue spring, a second intake tongue spring, and a third intake tongue spring. The first intake tongue spring and the third intake tongue spring are respectively located on the left and right sides of the second intake tongue spring. Each exhaust hole is located in the area where the tongue root of the second intake tongue spring is located, and is located between the areas where the tongue roots of the first intake tongue spring and the third intake tongue spring are located.

[0006] In some embodiments, the second suction spring is symmetrical about its own central axis, and the first suction spring and the third suction spring are symmetrical about the central axis.

[0007] In some embodiments, there are three exhaust through-holes, which are a first exhaust through-hole, a second exhaust through-hole and a third exhaust through-hole, wherein the center of the second exhaust through-hole is located on the central axis, and the first exhaust through-hole and the third exhaust through-hole are symmetrical left and right about the central axis.

[0008] In some embodiments, the first suction reed, the second suction reed and the third suction reed each include a tongue portion and a reed arm connected between the tongue portion and the reed root, and the width of each reed arm first decreases and then increases in a direction from the tongue portion to the reed root.

[0009] In some embodiments, the reed root of the second suction reed is located between the narrowest width regions of the reed arms respectively of the first suction reed and the third suction reed; and / or, each exhaust through-hole is located between the width-increasing regions of the reed arms respectively of the first suction reed and the third suction reed.

[0010] In some embodiments, the minimum width of the reed arm of the second suction reed is K1, the maximum width of the reed root of the second suction reed is K2, and 0.3<K1 / K2<0.5; and / or, the minimum width of the reed arm of the first suction reed is K3, the maximum width of the reed root of the first suction reed is K4, and 0.3<K3 / K4<0.5.

[0011] In some embodiments, the spacing between the respective tongue portions of the first suction reed and the third suction reed is smaller than the spacing between the respective reed roots thereof, so that the first suction reed and the third suction reed are arranged in a V shape.

[0012] The present utility model further provides a valve group assembly, comprising a valve plate, an exhaust valve sheet located on the suction side of the valve plate, and a suction valve sheet located on the exhaust side of the valve plate, wherein the suction valve sheet is the suction valve sheet according to any one of claims 1 to 7, the valve plate is provided with a first suction port, a second suction port and a third suction port that respectively correspond to the positions of the first suction reed, the second suction reed and the third suction reed in one-to-one correspondence, and the valve plate is further provided with a first exhaust port, a second exhaust port and a third exhaust port that respectively correspond to the positions of the first exhaust through-hole, the second exhaust through-hole and the third exhaust through-hole in one-to-one correspondence.

[0013] In some embodiments, the sum of the areas of the first suction port, the second suction port and the third suction port is S1, the area of the cylinder bore of the compressor adapted by the valve group assembly is S, and 0.1<S1 / S<0.2; and / or, the diameters of the first suction port, the second suction port and the third suction port are all d1, the diameter of the first exhaust port is d2, the diameter of the second exhaust port is d3, 0.7<d2 / d1<1, and / or d3≥d2.

[0014] This utility model also provides a piston compressor, including the valve assembly described above.

[0015] This utility model also provides a refrigerator, including the piston compressor described above.

[0016] This utility model provides an intake valve plate, valve assembly, piston compressor, and refrigerator, which have the following characteristics:

[0017] Beneficial effects:

[0018] Each exhaust vent is positioned in the middle region between the tongue root of the first intake spring on the left and the tongue root of the third intake spring on the right. That is, the tongue roots of the first and third intake springs are positioned on the outer regions of each exhaust vent. This ensures the structural purpose of multiple exhaust vents while allowing the length of the tongue arms of the first and third intake springs to be increased. This results in a greater difference in the length of the tongue arms of the first and third intake springs compared to the tongue arm of the second intake spring, thereby increasing the stiffness difference between the first and third intake springs and the second intake spring. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a front view structural schematic diagram of the intake valve plate according to an embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0022] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle;

[0023] Figure 4 yes Figure 1 A partial dimensional diagram of the intake valve plate in the diagram;

[0024] Figure 5 This is a three-dimensional structural schematic diagram (including cylinder head) of the valve assembly in another embodiment of the present invention;

[0025] Figure 6 yes Figure 5 A front view of the valve plate structure, where the dashed circle represents the cylinder bore;

[0026] Figure 7 This is a schematic diagram showing the volumetric efficiency variation curves of the technical solution of this utility model (a suction valve plate with three suction springs) and the single suction spring in the prior art.

[0027] The attached figures are labeled as follows:

[0028] 11. Exhaust port; 121. First intake reed; 122. Second intake reed; 123. Third intake reed; 13. Assembly hole; 2. Valve plate; 21. First intake port; 22. Second intake port; 23. Third intake port; 24. First exhaust port; 25. Second exhaust port; 26. Third exhaust port; 3. Exhaust valve plate; 31. Exhaust reed; 4. Cylinder head. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0031] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0032] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0033] See also Figures 1 to 7 As shown, according to an embodiment of the present invention, an intake valve plate is provided, including an intake valve plate body (not labeled in the figure). The intake valve plate body has a plurality of exhaust holes 11 (at least two) penetrating its two end faces. The intake valve plate body also has a first intake spring 121, a second intake spring 122, and a third intake spring 123 formed thereon. The first intake spring 121 and the third intake spring 123 are respectively located on the left and right sides of the second intake spring 122 (see details). Figure 1 As shown in the diagram, each of the exhaust holes 11 is located in the area where the root of the second intake tongue spring 122 (that is, the position where each intake tongue spring is connected to the intake valve plate body) is located, and is located between the areas where the roots of the first intake tongue spring 121 and the third intake tongue spring 123 are located.

[0034] In this technical solution, each exhaust vent 11 is located in the middle area sandwiched between the tongue root of the first intake tongue spring 121 on the left and the tongue root of the third intake tongue spring 123 on the right. That is, the tongue roots of the first intake tongue spring 121 and the third intake tongue spring 123 are respectively located on the outer side of each exhaust vent 11. This ensures the structural purpose of multiple exhaust vents 11 while allowing the length of the tongue arms of the first intake tongue spring 121 and the third intake tongue spring 123 to be lengthened. This results in a larger difference between the length of the tongue arms of the first intake tongue spring 121 and the third intake tongue spring 123 and the length of the tongue arm of the third intake tongue spring 123, thereby increasing the stiffness difference between the first intake tongue spring 121 and the third intake tongue spring 123.

[0035] See details Figure 1 As shown, in some embodiments, the second suction spring 122 is symmetrical about its own central axis (not shown in the figure, not indexed), and the first suction spring 121 and the third suction spring 123 are symmetrical about the central axis.

[0036] In this technical solution, the first suction tongue spring 121 and the third suction tongue spring 123 are designed to be symmetrical about their own central axis about the second suction tongue spring 122. This can ensure that the valve plate is stable and efficient during the suction process, make the force on the valve plate more uniform during the opening and closing process, reduce the risk of fatigue damage, and at the same time make the dynamic response of the valve plate opening and closing more stable, thereby improving the suction efficiency of the compressor.

[0037] In some embodiments, there are three exhaust ports 11, namely a first exhaust port, a second exhaust port, and a third exhaust port, so as to... Figure 1 The orientation shown is for reference. The first exhaust port, the second exhaust port and the third exhaust port are arranged from left to right. The center of the second exhaust port is located on the central axis and the first exhaust port and the third exhaust port are symmetrical about the central axis. It can be understood that there are three exhaust ports on the valve plate 2.

[0038] In this technical solution, three exhaust ports are set, which can significantly increase the compressor's exhaust volume. At the same time, the three exhaust ports are designed to be symmetrically arranged about the central exhaust port, which can evenly distribute the exhaust airflow to each exhaust port, avoiding local pressure pulsation. The uniform and symmetrical distribution can reduce turbulence and eddies when the airflow passes through, and reduce exhaust noise. The symmetrical design can also reduce airflow resistance loss, increase gas discharge speed, and reduce compressor energy consumption.

[0039] In some embodiments, the first suction reed 121, the second suction reed 122 and the third suction reed 123 each comprise a tongue (that is, the part for blocking or opening each suction port, not marked in the figure) and a tongue arm connected between the tongue and the root of the reed (not marked in the figure), the width of each tongue arm first decreases and then increases along the direction from the tongue to the root of the reed. It should be noted that the aforementioned increase or decrease shall be gradual instead of abrupt to prevent stress concentration.

[0040] In this technical solution, the width of the tongue arm first decreases and then increases along the extending direction of its length, which can ensure the rapid response of the reed opening and closing, and is also conducive to the reasonable optimization of the structure.

[0041] In some embodiments, the root of the second suction reed 122 is located between the minimum width regions of the tongue arms of the first suction reed 121 and the third suction reed 123; and / or, each of the exhaust through holes 11 is located between the increasing width regions of the tongue arms of the first suction reed 121 and the third suction reed 123.

[0042] In this technical solution, arranging the root of the second suction reed 122 between the minimum width regions of the tongue arms of the first suction reed 121 and the third suction reed 123, and arranging each exhaust through hole 11 between the increasing width regions of the tongue arms of the first suction reed 121 and the third suction reed 123 can make the structural arrangement more reasonable.

[0043] In some embodiments, the minimum width of the tongue arm of the second suction reed 122 is K1, the maximum width of the root of the second suction reed 122 is K2, and 0.3<K1 / K2<0.5; and / or, the minimum width of the tongue arm of the first suction reed 121 is K3, the maximum width of the root of the first suction reed 121 is K4, and 0.3<K3 / K4<0.5. See specifically Figure 1 As shown in the figure, in order to prevent stress concentration at the root position of each suction reed, a circular hole structure is generally arranged at the position of the maximum left and right width of the root of the reed, and in this case, the maximum width of the aforementioned root of the reed refers to the center distance between the two left and right circular holes of the same root of the reed.

[0044] In this technical solution, defining the numerical ranges of K1 / K2 and K3 / K4 can ensure that the stiffness and natural frequency parameters of the valve plate meet the design expectation, improve the suction efficiency of the compressor, and meet the working condition requirements.

[0045] In some embodiments, the distance between the tongues of the first inhalation tongue spring 121 and the third inhalation tongue spring 123 is smaller than the distance between the bases of their tongues, so that the first inhalation tongue spring 121 and the third inhalation tongue spring 123 form a V-shaped arrangement.

[0046] In this technical solution, the first suction tongue spring 121 and the third suction tongue spring 123 form a V-shaped arrangement, which can further optimize the space of the suction valve plate.

[0047] According to an embodiment of this utility model, a valve assembly is also provided, including a valve plate 2, an exhaust valve plate 3 located on the intake side of the valve plate 2, and an intake valve plate 1 located on the exhaust side of the valve plate 2. The intake valve plate 1 is the aforementioned intake valve plate. The valve plate 2 has a first intake port 21, a second intake port 22, and a third intake port 23 that correspond one-to-one with the positions of the first intake spring 121, the second intake spring 122, and the third intake spring 123, respectively. The valve plate 2 also has a first exhaust port 24, a second exhaust port 25, and a third exhaust port 26 that correspond one-to-one with the positions of the first exhaust through hole, the second exhaust through hole, and the third exhaust through hole, respectively. See details below. Figure 5 As shown, the exhaust valve plate 3 has three exhaust tongue springs 31, each used to control the opening and closing of the first exhaust port 24, the second exhaust port 25, and the third exhaust port 26. The exhaust valve plate 3 also has intake through-holes (not shown in the figure) that can encompass the three intake ports. It is understood that a cylinder head 4 is provided on the side of the exhaust valve plate 1 away from the valve plate 2. The cylinder head 4 has independent exhaust muffler chambers and intake chambers. The intake chambers correspond to the aforementioned intake through-holes, and the exhaust muffler chambers correspond to the positions of the three exhaust tongue springs 31. In a specific embodiment, the wall of the exhaust muffler chamber is integrally formed with a limiting protrusion (not shown in the figure) that can restrict the opening angle of each exhaust tongue spring 31.

[0048] In some embodiments, the total area of said first suction port 21, second suction port 22 and third suction port 23 is S1, and the area of the cylinder bore of the compressor adapted to the valve assembly is S, 0.1 < S1 / S < 0.2, which ensures a sufficient effective flow area during high-frequency operation, increases the suction volume per single cycle, can effectively improve suction efficiency, and balances low-frequency performance and cooling capacity of the high-frequency compressor; and / or, the diameters of said first suction port 21, second suction port 22 and third suction port 23 are all d1, the diameter of said first exhaust port 24 is d2, the diameter of said second exhaust port 25 is d3, 0.7 < d2 / d1 < 1, and / or, d3 ≥ d2, which ensures the timeliness of a single exhaust cycle at high frequency, improves high-frequency exhaust efficiency, in addition, allows the maximum exhaust area to be designed within the effective cylinder bore space, and takes into account both valve plate strength and valve plate sealing issues.

[0049] As shown in the Figure 7 experimental verification effect, according to the suction valve plate structure of the present solution, each independent reed valve plate has a high response frequency and high suction efficiency, and the volumetric efficiency of the compressor in the full frequency range is greatly improved, which is superior to the conventional valve plate structure (single suction reed), and is suitable for use in wide-frequency compressors. Meanwhile, the structural design of three reeds, with a small diameter of a single valve plate, reduces the stress on the valve plate, improves the problem of valve plate stress concentration, and improves the reliability of the valve plate.

[0050] Because the operating frequency range of the compressor is relatively wide, in a specific embodiment of the present application, three reed valve plates are designed, and different stiffness parameter designs are implemented at the same time, which can adapt to the response frequency of the valve plates during full-frequency operation and improve suction efficiency.

[0051] According to an embodiment of the present utility model, there is also provided a piston compressor comprising the above-mentioned valve assembly.

[0052] According to an embodiment of the present utility model, there is also provided a refrigerator comprising the above-mentioned piston compressor.

[0053] Those skilled in the art can easily understand that, without conflict, the advantageous technical features of the above various modes can be freely combined and superimposed.

[0054] The above description is only a preferred embodiment of the present utility model, and is not used to limit the present utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model. The above description is only the preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications shall also be regarded as the protection scope of the present utility model.

Claims

1. An intake valve plate, characterized in that, Comprising a suction reed body, wherein a plurality of exhaust through holes (11) penetrating through both end faces of the suction reed body are formed on the suction reed body, a first suction reed (121), a second suction reed (122) and a third suction reed (123) are further formed on the suction reed body, the first suction reed (121) and the third suction reed (123) are respectively located on the left and right sides of the second suction reed (122), each of the exhaust through holes (11) is located in a region where the root of the second suction reed (122) is located, and is located between the regions where the roots of the first suction reed (121) and the third suction reed (123) are located.

2. The intake valve plate according to claim 1, characterized in that, The second suction reed (122) is bilaterally symmetrical about its own central axis, and the first suction reed (121) and the third suction reed (123) are bilaterally symmetrical about the central axis.

3. The intake valve plate according to claim 2, characterized in that, There are three exhaust through holes (11), which are respectively a first exhaust through hole, a second exhaust through hole and a third exhaust through hole, wherein the center of the second exhaust through hole is located on the central axis, and the first exhaust through hole and the third exhaust through hole are bilaterally symmetrical about the central axis.

4. The intake valve plate according to claim 2, characterized in that, The first suction reed (121), the second suction reed (122) and the third suction reed (123) each comprise a reed head and a reed arm connected between the reed head and the reed root, and the width of each reed arm first decreases and then increases along a direction from the reed head to the reed root.

5. The intake valve plate according to claim 4, characterized in that, The root of the second suction reed (122) is located between the minimum width regions of the reed arms respectively possessed by the first suction reed (121) and the third suction reed (123); and / or, each of the exhaust through holes (11) is located between the width increasing regions of the reed arms respectively possessed by the first suction reed (121) and the third suction reed (123).

6. The intake valve plate according to claim 4, characterized in that, The minimum width of the reed arm of the second suction reed (122) is K1, and the maximum width of the root of the second suction reed (122) is K2, where 0.3<K1 / K2<0.5; and / or, the minimum width of the reed arm of the first suction reed (121) is K3, and the maximum width of the root of the first suction reed (121) is K4, where 0.3<K3 / K4<0.

5.

7. A valve assembly comprising a valve plate (2), an exhaust valve plate (3) located on the intake side of the valve plate (2), and an intake valve plate (1) located on the exhaust side of the valve plate (2), characterized in that, The suction reed (1) is the suction reed according to any one of claims 1 to 6, the valve plate (2) is provided with a first suction port (21), a second suction port (22) and a third suction port (23) which respectively correspond one-to-one to the positions of the first suction reed (121), the second suction reed (122) and the third suction reed (123), and the valve plate (2) is further provided with a first exhaust port (24), a second exhaust port (25) and a third exhaust port (26) which respectively correspond one-to-one to the positions of the first exhaust through hole, the second exhaust through hole and the third exhaust through hole.

8. The valve assembly according to claim 7, characterized in that, The sum of the areas of the first suction port (21), the second suction port (22) and the third suction port (23) is S1, the area of the cylinder bore of the compressor to which the valve group assembly is adapted is S, and 0.1<S1 / S<0.2; and / or, the diameters of the first suction port (21), the second suction port (22) and the third suction port (23) are all d1, the diameter of the first exhaust port (24) is d2, the diameter of the second exhaust port (25) is d3, and 0.7<d2 / d1<1, and / or, d3≥d2.

9. A piston compressor, characterized in that, Comprises the valve group assembly according to claim 7 or 8.

10. A refrigerator, characterized in that, Comprises the piston compressor according to claim 9.

Images