CN113623227B - Valve block limiter, valve assembly, compressor and refrigerating device - Google Patents
Valve block limiter, valve assembly, compressor and refrigerating device Download PDFInfo
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- CN113623227B CN113623227B CN202110959815.2A CN202110959815A CN113623227B CN 113623227 B CN113623227 B CN 113623227B CN 202110959815 A CN202110959815 A CN 202110959815A CN 113623227 B CN113623227 B CN 113623227B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
- F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
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Abstract
The invention relates to a valve block limiter, a valve assembly, a compressor and a refrigerating device, wherein the valve block limiter comprises a fixing structure, a limiting structure and a supporting structure, and the fixing structure is annular and is used for crimping and fixing a valve block; the limiting structure is used for limiting the opening height of the valve plate; the two ends of the supporting structure are respectively connected with the fixing structure and the limiting structure, and the fixing structure and the limiting structure are arranged at the opening height intervals. The valve plate limiter provided by the embodiment of the invention has at least the following beneficial effects: the fixing structure is in an annular shape so as to press-connect the fixed valve plate and enlarge the fixed area of the valve plate, so that the valve plate is fixed more firmly, and meanwhile, the stress concentration at the fixed position can be reduced due to the increase of the stress surface, so that the service life of the valve plate is prolonged; in addition, the limiting structure is arranged for limiting the opening height of the valve plate, so that the opening height of the valve plate can be controlled, and the opening and closing time of the valve plate can be controlled more effectively.
Description
Technical Field
The invention belongs to the technical field of refrigeration equipment, and particularly relates to a valve plate limiter, a valve assembly, a compressor and a refrigeration device.
Background
The existing compressor, especially the rotary compressor, has the exhaust component mainly comprising reed valve, and the valve plate of the reed valve has the advantages of simple structure, high reliability, etc. The valve block of reed valve needs to be fixed on the disk seat, then utilizes the elasticity deformation of valve block self in order to open the exhaust hole to utilize self rigidity to resume in order to close the exhaust hole, in the conventional art, adopt the screw to fix the valve block more, can lead to the valve block to become flexible easily, the time of opening and closing of valve block is difficult to control scheduling problem, and has shortened the life of valve block.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the valve plate limiter which can firmly fix the valve plate, effectively control the opening and closing time of the valve plate and prolong the service life of the valve plate.
Meanwhile, the invention also provides a valve assembly with the valve plate limiter, a compressor with the valve assembly and a refrigerating device with the compressor.
The valve plate limiter comprises a fixing structure, a limiting structure and a supporting structure, wherein the fixing structure is annular and is used for crimping and fixing a valve plate; the limiting structure is used for limiting the opening height of the valve plate; the two ends of the supporting structure are respectively connected with the fixing structure and the limiting structure, so that the bottom end face of the limiting structure and the bottom end face of the fixing structure have the opening height.
The valve plate limiter provided by the embodiment of the invention has at least the following beneficial effects: the fixing structure is in an annular shape so as to press-connect the fixed valve plate and enlarge the fixed area of the valve plate, so that the valve plate is fixed more firmly, and meanwhile, the stress concentration at the fixed position can be reduced due to the increase of the stress surface, so that the service life of the valve plate is prolonged; in addition, the limiting structure is arranged for limiting the opening height of the valve plate, so that the opening height of the valve plate can be controlled, and the opening and closing time of the valve plate can be controlled more effectively.
According to some embodiments of the invention, the spacing structure comprises a spacing head and a cantilever, a projection of the spacing head along an axial direction of the fixed structure being located within the ring shape; one end of the cantilever is connected with the limiting head, and the other end of the cantilever is connected with the supporting structure.
According to some embodiments of the invention, the spacing head has a through hole, or a bottom end surface of the spacing head has a groove.
According to some embodiments of the invention, the bottom end surface of the spacing head is parallel to the bottom end surface of the fixed structure.
According to some embodiments of the invention, the valve plate limiter further comprises a mounting structure for fixing the valve plate limiter.
According to some embodiments of the invention, the mounting structure is connected to the support structure and projects from the support structure in a direction away from the fixed structure, a bottom end face of the mounting structure being parallel to a bottom end face of the fixed structure.
According to some embodiments of the invention, the mounting structure is provided with a connection hole, the central axis of which is parallel to the central axis of the fixation structure.
A valve assembly according to an embodiment of the second aspect of the present invention is disposed in a discharge passage of a compressor, and includes a valve seat having a discharge hole, a valve plate, and a valve plate stopper according to an embodiment of the first aspect of the present invention; the valve plate covers the exhaust hole and comprises a fixing part and an openable head part connected with the fixing part; the fixing structure is pressed on the fixing part, and the limiting structure is used for controlling the opening height of the head.
The valve assembly according to the embodiment of the invention has at least the following beneficial effects: in the valve assembly, the fixed structure is arranged in an annular shape so as to press-connect the fixed valve plate, and the fixed area of the valve plate is enlarged, so that the valve plate is fixed more firmly, and meanwhile, the stress concentration at the fixed position can be reduced due to the increase of the stress surface, so that the service life of the valve plate is prolonged; in addition, the limiting structure is arranged for limiting the opening height of the valve plate, so that the opening height of the valve plate can be controlled, the opening and closing time of the valve plate can be controlled more effectively, and the performance of the poppet valve assembly is facilitated.
According to some embodiments of the invention, the fixation portion is annular and disposed around the head portion; at least one valve arm is disposed between the fixed portion and the head portion.
According to some embodiments of the invention, the plurality of valve arms are uniformly arranged along the circumferential direction of the head, and each valve arm is arranged in an involute shape extending around the head.
According to some embodiments of the invention, the bottom end face of the fixing structure is provided with at least one notch, the position of which corresponds to the position of the valve arm.
According to some embodiments of the present invention, the aperture of the vent hole covered by the valve plate is D, and the opening height of the head is H, which satisfies the following conditions:
a compressor according to an embodiment of the third aspect of the present invention includes a compressor body having a discharge passage and a valve assembly according to an embodiment of the second aspect of the present invention; the valve assembly is disposed in the exhaust passage.
The compressor provided by the embodiment of the invention has at least the following beneficial effects: because the valve block in the valve assembly is fixed more firmly, the service life of the valve block can be prolonged, and the opening and closing time of the valve block can be effectively controlled, thereby being beneficial to improving the energy efficiency of the compressor.
A refrigeration unit according to an embodiment of the fourth aspect of the present invention includes a compressor according to an embodiment of the third aspect of the present invention.
The refrigerating device provided by the embodiment of the invention has at least the following beneficial effects: the compressor adopting the embodiment of the third aspect of the invention can improve the working efficiency of the refrigerating device, prolong the service life of the refrigerating device and improve the satisfaction of users.
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.
Drawings
The invention is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a top view of a dual-arm valve plate in a closed state according to some embodiments of the present invention;
FIG. 2 is a top view of a dual-arm valve plate in a closed state according to some embodiments of the present invention;
FIG. 3 is a schematic perspective view of the valve plate with double valve arms shown in FIG. 2 in an open state;
FIG. 4 is a top view of a three-armed valve plate in a closed state according to some embodiments of the present invention;
fig. 5 is a schematic perspective view of the three-arm valve plate shown in fig. 4 in an opened state;
FIG. 6 is a schematic perspective view of a valve plate limiter according to some embodiments of the present invention;
FIG. 7 is a cross-sectional view of the valve plate retainer shown in FIG. 6;
FIG. 8 is a schematic perspective view of a mounting flange (with valve assembly) of a compressor according to some embodiments of the present invention;
FIG. 9 is a schematic perspective view of a valve plate retainer (without fasteners) according to some embodiments of the present invention;
FIG. 10 is a schematic perspective view of a valve plate retainer (with fasteners) according to some embodiments of the present invention;
FIG. 11 is a cross-sectional view of the valve plate retainer shown in FIG. 10;
FIG. 12 is a schematic perspective view of a mounting flange (with valve assembly) of a compressor according to some embodiments of the present invention;
fig. 13 is a cross-sectional view of the mounting flange (with valve assembly) shown in fig. 12.
FIG. 14 is a graph of coefficient of performance versus valve plate lift for a compressor according to some embodiments of the present invention;
fig. 15 is a schematic perspective view of a valve plate limiter (with a notch) according to some embodiments of the present invention.
Reference numerals:
mounting flange 800, mounting groove 801;
a fastener 1001;
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as top, bottom, inner, outer, etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as set, mounted, connected, assembled, located, etc. should be construed broadly and the specific meaning of the terms in the present invention will be reasonably determined by a person skilled in the art in view of the specific contents of the technical solutions.
The compressor is a driven fluid machine that lifts low-pressure gas to high-pressure gas, and is the heart of a refrigeration apparatus. The low-temperature low-pressure refrigerant gas is sucked from the suction channel, the motor is operated to drive the piston to compress the low-temperature low-pressure refrigerant gas, and then the high-temperature high-pressure refrigerant gas is discharged to the exhaust channel to provide power for refrigeration cycle.
The existing compressor, especially the rotary compressor, has the exhaust component mainly comprising reed valve, which is one form of air valve, valve plate made of elastic thin steel sheet, one end of the valve plate fixed to the valve seat and the other end free. Because the valve plate is a flexible opening and closing element, the reed valve has the characteristics of simple structure, light moving mass and small residual system volume, and has elasticity without additionally arranging a spring.
To optimize the performance of the valve plate lifting compressor, improvements can be made by reducing both the valve seat clearance volume and the exhaust resistance loss.
The valve block of reed valve needs to be fixed on the disk seat, then utilizes the elasticity deformation of valve block self in order to open the exhaust hole to utilize self rigidity to resume in order to close the exhaust hole, among the conventional art, adopt the screw fixed valve block more, can lead to the valve block to become flexible easily, the time of opening and closing of valve block is difficult to control, and reduces the problem of the life of valve block.
For this reason, a specific embodiment of the present invention is specifically described with reference to fig. 1 to 15.
Referring to fig. 6 and 7, a part of which illustrates a valve plate limiter 600 according to an embodiment of the first aspect of the present invention, the valve plate limiter 600 includes a fixing structure 601, a limiting structure and a supporting structure 605, and the fixing structure 601 is in a ring shape to press-fit and fix the valve plate 100; the limiting structure is used for limiting the opening height of the valve plate 100; the two ends of the supporting structure 605 are respectively connected with the fixing structure 601 and the limiting structure, so that the fixing structure 601 and the limiting structure are arranged at the opening height intervals along the axial direction of the fixing structure 601, in other words, the bottom end face of the limiting structure and the bottom end face of the fixing structure 601 have the opening heights.
It should be noted that, the fixing structure 601 is annular, and may include a circular shape or an approximately circular shape.
It should be noted that, the valve plate 100 may be any valve plate 100, for example, a valve plate 100 of a reed valve commonly used in a rotary compressor, and the edge of the valve plate 100 for fixing is pressed by using the annular fixing structure 601.
According to the valve plate limiter 600 of the embodiment of the invention, the fixing structure 601 is arranged in an annular shape to press-connect and fix the valve plate 100, so that the fixed area of the valve plate 100 can be increased, the valve plate 100 is more firmly fixed, and meanwhile, the stress concentration at the fixed position can be reduced due to the increase of the stress surface, so that the service life of the valve plate 100 is prolonged; in addition, the limiting structure is arranged for limiting the opening height of the valve plate 100, so that the opening height of the valve plate 100 can be controlled, and the opening and closing time of the valve plate 100 can be controlled more effectively.
It should be noted that, referring to fig. 6 and 7, the limiting structure includes a limiting head 602 and a cantilever 603, and a projection of the limiting head 602 on the fixed structure 601 is located in the ring shape; one end of the cantilever 603 is connected to the positioning head 602 and the other end is connected to the support structure 605.
It should be noted that, as the valve plate 100, the movable portion (such as the head 101 shown in fig. 3 and 5) is disposed in the annular region defined by the annular fixed structure 601 to open or close the exhaust hole, and the projection of the limiting head 602 on the fixed structure 601 is located in the annular shape, so as to limit the opening height of the movable portion.
Compared to the conventional valve assembly, it mainly uses its own stiffness recovery to close the exhaust hole, and thus, the opening height thereof is different each time, which results in that the opening and closing time of the valve sheet 100 is not easily controlled. The limiting head 602 of the valve plate limiter 600 in the embodiment of the present invention is used to limit the opening height of the valve plate 100.
In some embodiments, referring to fig. 6 and 9, the limiting head 602 is provided with a through hole 604, so that the limiting head 602 forms a ring structure, and when the bottom end surface of the limiting structure is in contact with the head 101, the viscosity of oil can be reduced, the falling back of the head 101 is accelerated, and the backflow loss is avoided.
It will be appreciated that the through hole 604 may be replaced by a groove formed on the bottom end surface of the spacing head 602, so that the viscous force of the oil can be reduced and the backflow loss can be reduced when the bottom end surface of the spacing structure contacts the head 101.
In some embodiments, referring to fig. 7 and 11, a bottom end surface of the spacing head 602 is parallel to a bottom end surface of the fixing structure 601.
The parallelism described in the present application is not necessarily completely parallel, and may be acceptable in terms of parallelism in the visual range of naked eyes, and is related to a specific use effect.
Through the arrangement, the movable part (the head 101 shown in fig. 3 and 5) of the valve plate 100 and the bottom end surface of the limiting head 602 can be ensured to be in stable contact, so that the deformation of the movable part caused by poor contact is avoided, and the service life of the valve plate 100 can be prolonged.
In some embodiments, referring to fig. 9 and 10, the valve plate limiter 600 further includes a mounting structure 901, where the mounting structure 901 is used to fix the valve plate limiter 600.
It should be noted that, in some cases, a special mounting structure 901, such as the valve plate limiter 600 shown in fig. 6, may not be provided, and when being mounted, it may be directly mounted in the mounting groove 801 of the mounting flange 800 through an interference fit, so that the mounting may be facilitated, and the overall strength of the mounting flange 800 may be improved.
In some embodiments, referring to fig. 9 and 10, the mounting structure 901 is specifically configured to: is connected to the support structure 605 and projects from the support structure 605 in a direction away from the fixed structure 601.
It will be appreciated that by having the mounting structure 901 projecting from the support structure 605 in a direction away from the securing structure 601, the mounting structure 901 can be secured with the mounting flange 800 conveniently.
In addition, referring to fig. 11, the bottom end surface of the mounting structure 901 is disposed parallel to the bottom end surface of the fixing structure 601, so that the bottom end surface of the fixing structure 601 can be better pressed against the fixed valve plate 100, and unnecessary displacement of the valve plate 100 is avoided.
Referring to fig. 11, the mounting structure 901 is provided with a connection hole 902, and the valve plate stopper 600 can be fixed to the mounting flange 800 by the connection hole 902 using a fastener 1001.
It is understood that, on the mounting flange 800, fixing holes corresponding to the connection holes 902 are provided at the top end periphery of the mounting groove 801.
It will be further appreciated that, referring to fig. 11, the central axis of the connecting hole 902 is parallel to the central axis of the fixing structure 601, so that the bottom end surface of the fixing structure 601 can be better pressed against the fixing valve plate 100, and unnecessary displacement of the valve plate 100 is avoided.
A valve assembly according to some embodiments of the second aspect of the present invention is disposed in a discharge passage of a compressor and includes a valve seat, a valve plate stopper 600 of the first aspect embodiment of the present invention, and a valve plate 100.
Specifically, referring to fig. 6-8, the valve seat has an exhaust vent in communication with the exhaust passage. It is understood that the valve seat may be a mounting flange 800, the mounting flange 800 being disposed within the compressor.
In some embodiments, referring to fig. 1, the valve sheet 100 may include a fixing portion 102 and an openable head portion 101 connected to the fixing portion 102, the head portion 101 covering the exhaust hole; the fixing structure 601 of the valve plate limiter 600 is pressed on the fixing portion 102, and the limiting structure can limit the opening height of the head 101.
Specifically, referring to fig. 1-3, a valve sheet 100 may include a head 101, a fixed portion 102, and two valve arms 103. The head 101 is positioned at the geometric center of the valve plate 100, and the fixing part 102 is annular and is arranged around the head 101; the two valve arms 103 are uniformly arranged between the head 101 and the fixing portion 102 along the circumferential direction of the head 101, two ends of each valve arm 103 are respectively connected with the head 101 and the fixing portion 102, and the valve arms 103 are arranged in an involute shape extending around the head 101.
It will be appreciated that the valve plate 100 is disposed on a valve seat of the compressor, the valve seat being disposed in a discharge passage of the compressor, wherein the head 101 is adapted to close a discharge hole (see fig. 1 and 2) when the compressor is in a suction state, and the head 101 is adapted to open the discharge hole (see fig. 3) when the compressor is in a discharge state, and gas is discharged from the compressor through a gap between the discharge hole and the head 101. When the exhaust is completed, the head 101 closes the exhaust hole again under the elastic restoring force of the valve arm 103, and covers and closes the exhaust hole.
It will also be appreciated that the positioning of the head 101 at the geometric center of the valve plate 100 ensures that the forces experienced by the valve arm 103 during opening and closing movements of the head 101 are uniform, thereby avoiding backflow losses caused by the inability of the head 101 to close the vent.
It should be noted that the number of the valve arms 103 is not limited to two, and may be set to one or more than two, for example, three (described in detail below), four, five, or more.
It will be appreciated that when the number of valve arms 103 is small, the flow resistance loss of the valve plate 100 can be reduced, but at the same time, the rigidity of the valve arms 103 is too small, so that untimely closing occurs, and the backflow loss is increased, which results in the overall performance of the compressor being reduced.
When the number of the valve arms 103 is too large, the head 101 can be closed timely, backflow loss is reduced, but flow resistance loss of the valve plate 100 is increased, and the overall performance of the compressor is reduced.
In some embodiments of the invention, the number of valve arms 103 is selected to be 2-4 to balance flow resistance losses and backflow losses.
In some embodiments, referring to fig. 4 to 5, the number of the valve arms 103 is 3, and by setting to 3, the flow resistance loss and the backflow loss can be balanced, thereby improving the response rate of the valve sheet 100, realizing the rapid opening and closing of the head 101, and improving the service performance of the compressor.
It should also be noted that the involute is a mathematical concept defined as: the distance from the point to the center of the circle is proportional to the angle at which the point is connected to the origin.
Specifically, a circular shaft is fixed on a plane, a wire is wound on the shaft, a wire head is pulled, the wire moves around the circular shaft and is always tangent to the circular shaft, and then a track of a fixed point on the wire on the plane is an involute.
By setting the valve arm 103 in an involute shape, the uniformity of the stress of the valve arm 103 when the valve arm 103 deforms along the opening direction of the head 101 can be ensured, and the radial connection rigidity of the head 101 and the fixing part 102 of the valve plate 100 can be improved while the length of the valve arm 103 is ensured, so that the response speed of the valve plate 100 is improved, and quick opening and closing can be realized.
In addition, the involute shape is adopted, and even stress can avoid stress concentration of the valve arm 103, so that the fatigue resistance of the valve arm 103 is improved, and the service life of the valve plate 100 is prolonged.
As shown in fig. 1, 2, and 4, the width of the valve arm 103 is equal, that is, the width is kept constant, in the extending direction of the valve arm 103, so that the uniformity of stress when the valve arm 103 is deformed along the opening direction of the head 101 can be ensured, and the stress concentration of the valve arm 103 can be avoided by the uniform stress, so that the fatigue resistance of the valve arm 103 can be improved, and the service life of the valve plate 100 can be prolonged.
In addition, the width of the gap between the adjacent valve arms 103 in the extending direction of the valve arms 103 is equal, that is, the gap is kept constant, so that the valve arms 103 can be conveniently processed, and the width of the processed valve arms 103 can be kept constant.
In some embodiments, the angle of rotation of the valve arm 103 is 180 degrees to 720 degrees.
Referring to fig. 2, the rotation angle of the valve arm 103 exceeds 360 degrees, and referring to fig. 4, the rotation angle of the valve arm 103 is approximately 360 degrees, and the rotation angle of the valve arm 103 is 180 degrees to 720 degrees, so that the length of the valve arm 103 can be increased, the valve arm 103 has enough deformation along the opening direction of the head 101, the rigidity of the valve arm 103 is reduced, the rigidity of the valve arm 103 is not too small, the deformability and rigidity of the valve arm 103 can be balanced well, and the flow resistance loss and the backflow loss are balanced.
In some embodiments, the junction of the valve arm 103 with the head 101, and the junction of the valve arm 103 with the fixed portion 102, are provided with transition structures. By providing the transition structure, stress concentration at the junction of the valve arm 103 and the head 101 and the junction of the valve arm 103 and the fixing portion 102 can be reduced, thereby affecting the service life of the valve sheet 100.
It will be appreciated that a transition structure may be provided only at the junction of the valve arm 103 with the head 101 or only at the junction of the valve arm 103 with the fixed portion 102, as desired.
In contrast to fig. 1 and 2, in fig. 1, no transition structure is provided at the connection between the valve arm 103 and the head 101 and at the connection between the valve arm 103 and the fixed portion 102, whereas in fig. 2, no transition structure is provided at the connection between the valve arm 103 and the head 101 and at the connection between the valve arm 103 and the fixed portion 102.
In some embodiments, the transition structure may be provided as a chamfer, such as a rounded corner, to reduce stress concentrations at the connection.
Specifically, referring to fig. 2 and 3, the transition structure is specifically configured as a stress concentrating hole 201. In general, the stress concentrating hole 201 may be configured as a circular hole, an oval hole, or other holes having a curved inner wall surface, and it should be noted that the inner surface of the stress concentrating hole 201 should be smooth, so that stress concentration at the connection between the valve arm 103 and the head 101 and/or at the connection between the valve arm 103 and the fixing portion 102 can be avoided.
Referring to FIG. 4, in some embodiments, the vent hole (not shown) covered by the valve plate 100 has a diameter D, and the circle at the connection point of the valve arms 103 and the head 101 has a diameter D 1 (hereinafter referred to as "diameter D1 of the head 101"), the minimum sealing distance of the head 101 is b, the aperture D of the exhaust hole, and the diameter D of the head 101 1 And the minimum sealing distance b satisfies equation one:
D 1 =d+2b; wherein b=0.8 mm to 1.5mm.
It will be appreciated that by limiting the minimum sealing distance b of the head 101 to 0.8mm to 1.5mm, the flow resistance loss can be minimized and the exhaust performance of the poppet valve assembly can be minimized while ensuring a good closure of the exhaust port by the head 101.
It should be noted that, when the stress concentration hole 201 is provided at the connection position of the valve arm 103 and the head 101, the connection points of the valve arms 103 and the head 101 may be regarded as the geometric center of the stress concentration hole 201; when there are only two valve arms 103, the connection of the two valve arms 103 to the connection point of the head 101 forms the diameter D of the circle 1 The method comprises the steps of carrying out a first treatment on the surface of the When there are more than three valve arms 103, the connection point of the valve arms 103 to the head 101 can directly define a diameter D 1 Is a circle of (c).
It should be noted that the involute parameter of the valve arm 103 in the present invention satisfies equation one:
wherein, the base circle radius a satisfies the following formula:
and the involute angle is formed, and theta is the phase difference. As is known to those skilled in the art, the base circle, involute angle +.>
The phase difference theta is a mathematical concept in an involute equation, and the specific shape of the involute can be determined by combining the three equations.
It will be appreciated that the size of the bleed hole is a parameter that can be measured and determined on the compressor, and that, first, the diameter D of the head 101 can be determined based on the size of the bleed hole in combination with the above equation one 1 Is a suitable dimension of (a); then, according to the diameter D of the head 101 1 And equation one above, the basic shape of the valve arm 103 can be determined.
In equation one, the involute angle
The phase difference θ may be further selected in combination with the arm width L of the valve arm 103 a The arm length L is selected to satisfy the arm width L a Requirements of arm length L. />
Referring to FIG. 4, in some embodiments, the vent hole covered by the valve plate 100 has a diameter D, and the circle at the connection point of the valve arms 103 and the fixing portion 102 has a diameter D 2 (hereinafter referred to as "diameter D of fixing portion 102 2 ") diameter D of the fixing portion 102 2 And the aperture D of the exhaust hole satisfies the formula II:
D 2 ＝nD；
wherein n is an empirical coefficient obtained based on simulation results, and the range of values of n is as follows: 2.51< n <3.52.
It will be appreciated that by defining the diameter D of the circle at which the plurality of valve arms 103 connect to the fixed portion 102 2 The relationship with the aperture D of the exhaust hole can optimize the elastic deformation amount of the valve arm 103, balance the deformation capacity and rigidity of the valve arm 103, and thereby improve the response rate of the valve sheet 100 to realize rapid opening and closing of the head 101.
It should be noted that, when the stress concentration hole 201 is provided at the connection position of the valve arm 103 and the fixing portion 102, the connection points of the plurality of valve arms 103 and the fixing portion 102 may be regarded as the geometric center of the stress concentration hole 201; when there are only two valvesWhen the arms 103 are connected, the connecting line of the connecting points of the two valve arms 103 and the fixed part 102 forms the diameter D of the circle 2 The method comprises the steps of carrying out a first treatment on the surface of the When there are more than three valve arms 103, the connection point of the valve arms 103 with the fixed portion 102 can directly define a diameter D 2 Is a circle of (c).
Referring to FIG. 4, in some embodiments, the valve arm 103 has a width L a Diameter D of head 101 1 Diameter D of the fixing portion 102 2 And width L of valve arm 103 a The formula three is satisfied:
it will be appreciated that the width of the valve arm 103 can affect the rotation angle of the valve arm 103 and also affect the rigidity of the valve arm 103, and by the above arrangement, the length of the valve arm 103 (i.e., the rotation angle of the valve arm 103 is ensured at the same time) can be ensured, and at the same time, the valve arm 103 has a sufficient deformation amount along the opening direction of the head 101, so that the rigidity of the valve arm 103 is properly reduced, and the deformability and rigidity of the valve arm 103 can be well balanced, thereby balancing the flow resistance loss and the backflow loss.
The diameter D of the fixing portion 102 can be determined according to the formula two 2 D is 2 = (2.51-3.52) D, the width L of the valve arm 103 can be determined further according to formula three a At the same time, according to the width L of the valve arm 103 a The value of the phase difference θ in equation one can be appropriately adjusted to further determine the shape of the valve arm 103.
Referring to FIG. 4, in some embodiments, the valve arm 103 has a length L and the head 101 has a diameter D 1 Diameter D of the fixing portion 102 2 And width L of valve arm 103 a The formula four is satisfied:
wherein Y is an involute coefficient, satisfying the formula five: y is more than or equal to 0 and less than or equal to 4D 1 ；
L 0 The minimum stress arm length is that the joint of the valve arm 103 and the head 101 and/or the fixing part 102 is provided with a stress concentration hole 201, the radius of the stress concentration hole 201 is r, and the formula six is satisfied: l is more than or equal to 5r 0 ≤15r。
It is understood that when r is 0, it can be regarded that the connection between the valve arm 103 and the head 101 and the connection between the valve arm 103 and the fixing portion 102 are not provided with the stress concentration holes 201.
Therefore, when the stress concentration hole 201 is not provided at the junction of the valve arm 103 and the head portion 101 and at the junction of the valve arm 103 and the fixed portion 102, L 0 =0; in a corresponding manner,
it will be appreciated that the length of the valve arm 103 can also affect the rigidity of the valve arm 103 and the deformability of the valve arm 103, and by the above arrangement, the rigidity of the valve arm 103 can be ensured, and at the same time, the valve arm 103 has a sufficient deformation along the opening direction of the head 101, so that the deformability and rigidity of the valve arm 103 can be balanced well, and the flow resistance loss and the backflow loss can be balanced, and at the same time, the response rate of the valve sheet 100 can be improved, so that the head 101 can be opened and closed quickly.
The diameter D of the fixing portion 102 can be determined according to the formula two 2 Further, according to the fourth, fifth and sixth formulas, the length L of the valve arm 103 can be determined, and at the same time, according to the length range of the valve arm 103, the involute angle in the first formula can be properly adjusted
To further define the shape of the valve arm 103.
According to experiments, compared with the traditional reed valve plate 100, the valve plate 100 provided by the invention has higher response rate in the working process of the rotary compressor, and the exhaust flow in unit time is improved, so that the working efficiency of the compressor is improved.
In some embodiments, referring to fig. 10 and 11, the bottom end surface of the fixing portion 102 of the valve plate 100 is in contact with the valve seat periphery of the mounting flange 800800, the head 101 is in contact with the exhaust port, and the annular fixing structure 601 of the valve plate stopper 600 is in contact with the upper end surface of the fixing portion 102 of the valve plate 100 to fix the valve plate 100 to the mounting flange 800800.
It should be noted that, referring to fig. 5 and 6, the valve plate limiter 600 further includes a connection structure for connecting the fixing structure 601 and the limiting structure, and along the opening direction of the head 101 (i.e., the axial direction of the exhaust hole), the distance between the bottom end surface of the limiting structure and the bottom end surface of the fixing structure 601 is H, and the magnitude of H determines the lift space of the head 101.
In some embodiments, the lift height H and the exhaust hole diameter D satisfy equation seven:
specifically, the larger the exhaust hole diameter D, the larger the exhaust amount per unit, and the lift height H is not set too large to shorten the exhaust time; the smaller the exhaust hole diameter D, the smaller the exhaust amount per unit, and the lift height H is not preferably set too small to extend the exhaust time.
With the above arrangement, the relationship between the unit amount of exhaust and the exhaust time can be balanced, whereby the flow resistance loss and the return loss can be balanced.
Referring to FIG. 14, for a given discharge aperture D, and with other parameters of the valve plate 100 determined, based on the performance simulation of the overall compressor energy efficiency, when
And the energy efficiency performance coefficient of the compressor is obviously excellent.
It can be understood that the spacing head 602 is plate-shaped, and the bottom end surface of the spacing head 602 should be set to be in a flat state, and when the head 101 is opened to the top end, the bottom end surface of the spacing head 602 can be in a surface contact state with the head 101.
It will also be appreciated that the diameter D of the annular interior of the fixed structure 601 3 The diameter of the circle at which the connection points of the plurality of valve arms 103 and the fixed portion 102 are located is D 2 This arrangement can prevent the fixing structure 601 from interfering with the elastic deformation of the valve arm 103.
In some embodiments, referring to fig. 12 and 15, at least one notch 1501 is formed on the bottom end surface of the fixing structure 601, and the position of the notch 1501 corresponds to the position of the valve arm 103.
It can be understood that, at the position corresponding to the position of the valve arm 103, the bottom end surface of the fixing structure 601 is provided with a notch 1501, which can be used to avoid the deformation of the valve arm 103 of the valve sheet 100 caused by the lifting motion, so as to avoid unnecessary interference.
It will also be appreciated that the number of notches 1501 is the same as the number of valve arms 103 of the valve plate 100.
A compressor (not shown) according to some embodiments of the third aspect of the present invention includes a compressor body and a valve assembly according to embodiments of the second aspect of the present invention.
Specifically, the compressor body has an exhaust passage; the valve assembly is disposed in the exhaust passage.
It should be noted that, in some embodiments, the valve assembly is specifically disposed on the mounting flange 800 (i.e. the valve seat) of the compressor, in order to fix the valve plate limiter 600 on the mounting flange 800, a mounting groove 801 may be disposed on the mounting flange 800 around the exhaust hole, and then the valve plate limiter 600 is clamped in the mounting groove 801, for example, by being mounted in an interference fit manner, where it is required that the inner diameter of the mounting groove 801 is slightly smaller than the outer diameter of the fixing structure 601; the valve plate 100 may be fixed to the mounting flange 800 by the mounting structure 901 of the valve plate stopper 600.
In the prior art, when the thickness of the valve seat is reduced, on the one hand, when the end face of the mounting flange 800 of the valve seat is precisely machined, the flatness and the like of the part thin-wall structure are obviously deteriorated compared with other areas. On the other hand, in the operation process of the compressor, the valve seat is always extruded by high-pressure gas and low-pressure gas on two sides of the valve seat, and the long and narrow valve seat structure greatly reduces the rigidity of the mounting flange 800, so that the deformation is easy to occur, and the performance and the reliability of the compressor are adversely affected.
The compressor according to the embodiment of the invention has at least the following beneficial effects: because the valve plate 100 in the valve assembly is more firmly fixed, the service life of the valve plate 100 is prolonged and the opening and closing time of the valve plate 100 is effectively controlled, thereby being beneficial to improving the energy efficiency of the compressor.
Meanwhile, the compressor provided by the embodiment of the invention can effectively reduce the maximum span and the cross-sectional area of the valve seat on the compressor, and can replace the structure of the exhaust valve plate 100 used in the existing solution.
Compared with the traditional exhaust structure, the invention has the advantages of compact structure, higher rigidity of the mounting flange 800, good sealing performance, timely closing and the like.
In addition, referring to fig. 9 to 11, a mounting structure 901 may be further provided on the valve plate stopper 600, a connection hole 902 may be provided on the mounting structure 901, and a fastener 1001 may be passed through the connection hole 902 to fix the valve plate stopper 600 on the mounting flange 800800 of the compressor, and in this case, a sink structure may or may not be provided around the exhaust hole.
A refrigeration unit (not shown) according to some embodiments of the fourth aspect of the present invention includes a compressor according to embodiments of the third aspect of the present invention.
The refrigerating apparatus of the present invention may be a refrigerating apparatus such as an air conditioner or a refrigerator.
The refrigerating device provided by the embodiment of the invention has at least the following beneficial effects: the compressor adopting the embodiment of the third aspect of the invention can improve the working efficiency of the refrigerating device, prolong the service life of the refrigerating device and improve the satisfaction of users.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, and finally, it should be described that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A valve assembly disposed in a discharge passage of a compressor, comprising:
the valve seat is provided with an exhaust hole communicated with the exhaust channel, and the aperture of the exhaust hole is D;
the valve plate comprises a fixing part, a head part which covers the exhaust hole and can be opened, and a plurality of valve arms connected between the fixing part and the head part, wherein each valve arm is in an involute shape, and the diameter of a circle where the connection points of the valve arms and the head part are positioned is D 1 The diameter of the circle where the connection points of the valve arms and the fixed part are located is D 2 The method comprises the steps of carrying out a first treatment on the surface of the The width of the valve arm is L a The method comprises the following steps:
the length of the valve arm is L, and the valve arm meets the following conditions: />
Wherein Y is an involute coefficient, satisfying: y is more than or equal to 0 and less than or equal to 4D 1 ，L 0 Is the minimum stress arm length;
the valve plate limiter comprises a fixing structure, a limiting structure and a supporting structure, wherein the fixing structure is annular and is used for crimping and fixing the valve plate; the limiting structure is used for limiting the opening height H of the valve plate; the two ends of the supporting structure are respectively connected with the fixed structure and the limiting structure, so that the bottom end face of the limiting structure and the bottom end face of the fixed structure have the opening height H, and the fixed structure and the limiting structure are arranged at intervals of the opening height;
wherein the aperture of the exhaust hole is D, and the head part is openedThe starting height is H, and the following conditions are satisfied:
2. the valve assembly of claim 1, wherein the limit structure comprises:
a positioning head, wherein a projection along an axial direction of the fixed structure is positioned in the ring;
and one end of the cantilever is connected with the limiting head, and the other end of the cantilever is connected with the supporting structure.
3. The valve assembly of claim 2, wherein the spacing head has a through hole or a bottom end surface of the spacing head has a groove.
4. The valve assembly of claim 2, wherein a bottom end surface of the spacing head is parallel to a bottom end surface of the fixed structure.
5. The valve assembly of claim 1, wherein the valve plate retainer further comprises a mounting structure for securing the valve plate retainer.
6. The valve assembly of claim 5, wherein the mounting structure is coupled to the support structure and projects from the support structure in a direction away from the fixed structure, a bottom end surface of the mounting structure being parallel to a bottom end surface of the fixed structure.
7. The valve assembly of claim 5, wherein the mounting structure is provided with a connection hole having a central axis parallel to a central axis of the fixed structure.
8. The valve assembly of claim 1, wherein a bottom end surface of the fixed structure is provided with at least one notch, the position of the notch corresponding to the position of the valve arm.
9. A compressor, comprising:
a compressor body having an exhaust passage;
the valve assembly of any one of claims 1 to 8 disposed in the exhaust passage.
10. A refrigeration device comprising the compressor of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110959815.2A CN113623227B (en) | 2021-08-20 | 2021-08-20 | Valve block limiter, valve assembly, compressor and refrigerating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110959815.2A CN113623227B (en) | 2021-08-20 | 2021-08-20 | Valve block limiter, valve assembly, compressor and refrigerating device |
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| Publication Number | Publication Date |
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| CN113623227A CN113623227A (en) | 2021-11-09 |
| CN113623227B true CN113623227B (en) | 2023-05-16 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3307819A (en) * | 1965-04-12 | 1967-03-07 | Cocito Joe Michael | Disc valve for vacuum board |
| JP2005120836A (en) * | 2003-10-14 | 2005-05-12 | Matsushita Electric Ind Co Ltd | Compressor |
| DE102004047159B4 (en) * | 2004-09-29 | 2006-09-07 | Danfoss Compressors Gmbh | Piston compressor, in particular hermetic refrigerant compressor |
| FR2960948B1 (en) * | 2010-06-02 | 2015-08-14 | Danfoss Commercial Compressors | SPIRAL REFRIGERATING COMPRESSOR |
| CN102748297A (en) * | 2011-04-21 | 2012-10-24 | 广东美芝制冷设备有限公司 | Compressor exhaust apparatus |
| CN104728085A (en) * | 2015-03-19 | 2015-06-24 | 安徽美芝制冷设备有限公司 | Compressor and exhaust valve assembly thereof |
| CN212272546U (en) * | 2020-08-31 | 2021-01-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Upper flange bearing, pump body assembly and compressor |
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