Lift limiter, valve body, compressor and air conditioner

Abstract

The lift limiter comprises a body, the body comprises a fixing part and a limiting part, the fixing part is used for being connected with a valve block, the limiting part extends away from the valve block, the limiting part is provided with a limiting face used for abutting against the valve block when the valve block approaches, and the molded line of the limiting face is in non-arc arc change. When the exhaust hole of the compressor is opened, the valve plate is subjected to acting force from the compressor to the lift limiter, and the valve plate is connected to the fixing part, so that the valve plate is bent to the limiting part by taking the fixing part as a base point. According to the embodiment, the molded line of the limiting face used for abutting against the valve block changes in a non-circular arc mode, and therefore when the valve block is lifted to different heights, the limiting face can adapt to the bending degree of the valve block to a certain degree, and the contact length of the limiting face and the valve block is increased. According to the scheme, the molded line of the limiting surface is designed, so that the influence effect of the lift limiter on the rigidity and the opening and closing speed of the valve plate in the prior art is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air outlet devices, and particularly to a lift limiter, a valve body, a compressor, and an air conditioner. Background Art

[0002] A compressor is one of the core components of devices such as air conditioners. There are various types of compressors. According to the structural type, they can be divided into piston compressors, rotary compressors, etc. Among them, rotary compressors commonly use reed valves as exhaust valves. A reed valve includes two parts: a valve plate and a lift limiter. The valve plate plays a role in changing the conduction state of the exhaust hole; the lift limiter, also known as the back plate, is used to limit the maximum displacement of the valve plate opening. In addition, the lift limiter can also affect the stiffness of the valve plate, and thus affect the opening and closing speed of the valve plate.

[0003] In the prior art, the profile lines of the lift limiter in contact with the valve plate are mostly single arcs, straight lines, or a combination of the two. However, when using such lift limiters, when the lift of the valve plate is relatively small, such as 0 mm - 1.3 mm, the contact length between the lift limiter and the valve plate is relatively short or there is no contact. When the lift of the valve plate is relatively large, such as 1.3 mm - 1.9 mm, the contact length between the lift limiter and the valve plate increases rapidly. Therefore, the current lift limiters do not fully improve the stiffness of the valve plate and the opening and closing speed of the valve plate. Summary of the Invention

[0004] The main purpose of the present invention is to provide a lift limiter, aiming to improve the influence effect of the lift limiter on the stiffness and opening and closing speed of the valve plate in the prior art.

[0005] To achieve the above object, the present invention provides a lift limiter for limiting the stroke of a valve plate, including a body. The body includes a fixing part and a limiting part. The fixing part is used to connect with the valve plate. The limiting part extends away from the valve plate. The limiting part has a limiting surface for abutting against the valve plate when the valve plate approaches. The profile line of the limiting surface changes in a non-circular arc curve.

[0006] In one embodiment, the profile line of the limiting surface changes in a variable curvature function.

[0007] In one embodiment, the contact starting point of the limiting surface and the valve plate is defined as the origin, the direction away from the valve plate of the limiting part is the Y-axis, and the direction away from the fixing part of the limiting part is the X-axis;

[0008] On the projection of the X-axis, the contact length between the limiting surface and the valve plate is t, and the total length of the valve plate is;

[0009] On the projection of the Y-axis, the contact height between the limiting surface and the valve plate is h;

[0010]

[0011] In one embodiment, the distance from any point on the profile line of the limiting surface to the X-axis is 0 mm - 1.9 mm.

[0012] In one embodiment, the thickness of the fixing part is less than the thickness of the limiting part.

[0013] In one embodiment, the fixing part is hollow to form a fixing hole, and the fixing hole is used to connect the fixing part and the valve plate.

[0014] In one embodiment, an arc-shaped first boss is formed by the side wall of the limiting part protruding, and the first boss is located at one end of the limiting part away from the fixing part.

[0015] The present invention also provides a valve body, including a valve plate and a lift limiter according to any of the above embodiments, and the lift limiter is used to limit the stroke of the valve plate.

[0016] The present invention also provides a compressor, including the valve body.

[0017] The present invention also provides an air conditioner, including the compressor.

[0018] According to the lift limiter proposed in this embodiment, when the compressor exhaust hole is in the open state, the valve plate is subjected to a force from the compressor towards the lift limiter. Since the valve plate is connected to the fixing part, the valve plate bends towards the limiting part with the fixing part as the base point. In this embodiment, the profile line of the limiting surface for abutting against the valve plate changes in a non-circular arc curve. Therefore, when the valve plate is lifted to different heights, the limiting surface can adapt to the bending degree of the valve plate to a certain extent, so as to increase the contact length between the limiting surface and the valve plate. By adopting the technical solution of this embodiment, through the design of the profile line of the limiting surface, the influence effect of the lift limiter on the stiffness and opening / closing speed of the valve plate in the prior art is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a schematic structural diagram of an embodiment of the lift limiter of the present invention;

[0021] Figure 2 For Figure 1 a schematic structural diagram of the lift limiter from one perspective in

[0022] Figure 3 This is a schematic diagram of the lift limiter of the present invention in contact with the valve plate.

[0023] Reference numerals:

[0024] 100 - Lift limiter;

[0025] 110 - Fixed part, 110a - Fixed hole, 120 - Limiting part, 120a - Limiting surface, 120b - Through hole, 122 - First boss, 124 - Second boss.

[0026] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0028] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The lift limiter 100 proposed in the embodiments of the present invention is used to limit the stroke of the valve plate. The lift limiter 100 and the valve plate both belong to the component structures of the valve body and are used to control the opening and closing of the exhaust hole of the compressor.

[0031] Please refer to Figures 1 - 3, a lift limiter 100, comprising a body which includes a fixing part 110 and a limiting part 120. The fixing part 110 is used for connecting with a valve plate, and the limiting part 120 extends away from the valve plate. The limiting part 120 has a limiting surface 120a for abutting against the valve plate when the valve plate approaches. The profile line of the limiting surface 120a changes in a non-circular arc curve.

[0032] When the compressor exhaust hole is in the closed state, the valve plate is buckled on the exhaust hole.

[0033] When the compressor exhaust hole is in the open state, the valve plate is subjected to a force from the compressor towards the lift limiter 100. Since the valve plate is connected to the fixing part 110, the valve plate bends towards the limiting part 120 with the fixing part 110 as the base point. In this embodiment, the profile line of the limiting surface 120a for abutting against the valve plate changes in a non-circular arc curve. Therefore, when the valve plate is lifted to different heights, the limiting surface 120a can adapt to the bending degree of the valve plate to a certain extent, so as to increase the contact length between the limiting surface 120a and the valve plate.

[0034] Adopting the technical solution of this embodiment, by designing the profile line of the limiting surface 120a, the influence of the lift limiter 100 on the stiffness and opening / closing speed of the valve plate in the prior art is improved.

[0035] It can be understood that the "profile line" mentioned in this embodiment refers to the contour line of the limiting surface 120a in the direction from near the fixing part 110 to far from the fixing part 110.

[0036] Furthermore, the curve of the profile line refers to the effective line that can contact the valve plate, and the part that cannot contact the valve plate is not limited. Hereinafter, it is assumed that the contact length between the lift limiter 100 and the valve plate is infinite.

[0037] In addition, this embodiment does not limit the actual pattern of the profile line. The profile line can be a certain curve function or a combined pattern composed of multiple functions.

[0038] For example, the first half of the profile line can be an exponential function, and the second half can be a power function. Of course, other functions can also be inserted in the middle of a certain function.

[0039] In one embodiment, the profile line of the limiting surface 120a changes in a variable curvature function.

[0040] Curvature refers to the rotation rate of the tangent direction angle of a point on a curve with respect to the arc length, which is a numerical value indicating the bending degree of the curve at a certain point. In this embodiment, the profile line of the limiting surface 120a is designed as a variable curvature function, aiming to change the curvature of the function when the valve plate is lifted to different heights, so that the limiting surface 120a can support the valve plate more effectively.

[0041] In a feasible implementation, from one end close to the fixing part 110 to the other end far from the fixing part 110, the curvature of the profile line of the limiting surface 120a gradually increases.

[0042] Please continue to refer to Figures 1 - 3 , in a specific embodiment, the contact starting point of the limiting surface 120a and the valve plate is defined as the origin, the direction away from the valve plate of the limiting part 120 is the Y-axis, and the direction away from the fixing part 110 of the limiting part 120 is the X-axis; on the projection of the X-axis, the contact length between the limiting surface 120a and the valve plate is t, and the total length of the valve plate is; on the projection of the Y-axis, the contact height between the limiting surface 120a and the valve plate is h; then

[0043]

[0044] Specifically, as Figure 3 shown, y is the height corresponding to the contact length t between the lift limiter 100 and the valve plate, y1 is the distance from the end of the tangent line at t to y, and y2 is the distance from the end of the valve plate to y1.

[0045] Therefore, h = y + y1 + y2;

[0046] Let h = h(t);

[0047] y = y(h);

[0048] y1 = y′(t)×(l v -t) = y′×(l v -t);

[0049]

[0050] Since the bending moments inside and outside the contact point are equal;

[0051] Therefore

[0052]

[0053] So there is a control equation

[0054] It should be noted that this control equation is a relational function of the second derivative of y and t, and the specific structure of the limiting surface can be obtained by substituting data.

[0055] Designing the profile line of the limiting surface 120a with the control equation proposed in this embodiment can make the limiting surface 120a fit the valve plate as much as possible, thereby further improving the influence on the rigidity and opening / closing time of the valve plate.

[0056] In a more specific embodiment, the distance from any point on the profile line of the limiting surface 120a to the X-axis is 0 mm - 1.9 mm. At this size, the profile line of the limiting surface 120a obtained according to the control equation is relatively close to the curvature of the valve plate.

[0057] Please continue to refer to Figure 1 , in yet another embodiment, the thickness of the fixing portion 110 is less than the thickness of the limiting portion 120. With such a design, in the bending process of manufacturing the lift limiter 100, since the thicknesses of the fixing portion 110 and the limiting portion 120 are inconsistent, the bending point of the lift limiter 100 can be close to the junction of the fixing portion 110 and the limiting portion 120, thereby improving the yield rate of the lift limiter 100.

[0058] In a specific embodiment, the fixing portion 110 is hollow to form a fixing hole 110a, and the fixing hole 110a is used to connect the fixing portion 110 to the valve plate.

[0059] In this embodiment, the fixing hole 110a can be used to pass a stud, and the stud fixedly connects the lift limiter 100 and the valve plate together. With this fixing structure, the processing is simple, no additional fixing structure needs to be added, the space occupied by the lift limiter 100 is relatively reduced, and the structural compactness of the compressor applying the lift limiter 100 is improved.

[0060] Optionally, the bolt passes through the lift limiter 100 and the valve plate and is locked to the pump body in the compressor.

[0061] As Figure 1 shown, in yet another specific embodiment, an arc-shaped first boss 122 is formed by the side wall of the limiting portion 120, and the first boss 122 is located at one end of the limiting portion 120 away from the fixing portion 110.

[0062] It can be understood that one end of the valve plate away from the fixing portion 110 has a covering portion for covering the exhaust hole. In order to improve the covering effect of the valve plate, the size of the covering portion is relatively larger than other parts. Therefore, in this embodiment, the design of the first boss 122 increases the size of one end of the limiting portion 120 away from the fixing portion 110, increases the adaptability between the lift limiter 100 and the valve plate, and further improves the limiting effect of the lift limiter 100.

[0063] Further, a through hole 120b is formed at one end of the valve plate away from the fixing portion 110, and the through hole 120b is located in the middle of the first boss 122.

[0064] Optionally, a second boss 124 is further provided on the side wall of the limiting portion 120, and the second boss 124 is located in the middle of the limiting portion 120, so as to improve the structural strength of the lift limiter 100.

[0065] The present invention also provides a valve body, which includes a valve disc and a lift limiter 100 according to any of the above embodiments. The lift limiter 100 is used to limit the stroke of the valve disc. Since the valve body in this embodiment adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0066] In addition, the valve body provided in this embodiment may be, but is not limited to, a reed valve.

[0067] The present invention also provides a compressor, which includes the valve body provided in the above embodiment. The compressor further includes a pump body for compressing gas. An exhaust hole for exhausting gas is formed on the pump body, and the valve body is used to control the opening and closing of the exhaust hole.

[0068] Optionally, the compressor is a rotary compressor.

[0069] The present invention also provides an air conditioner, which includes a compressor.

[0070] Furthermore, the air conditioner further includes a condenser and an evaporator. The compressor is used to receive the gas delivered by the evaporator and deliver it to the condenser after compression.

[0071] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A lift limiter for limiting the stroke of a valve disc, characterized in that, It includes a body, and the body includes a fixing part and a limiting part. The fixing part is used to connect with the valve plate. The limiting part extends away from the valve plate. The limiting part has a limiting surface for abutting against the valve plate when the valve plate approaches. The profile of the limiting surface changes in a non-circular arc curve.

2. The lift limiter according to claim 1, characterized in that, The profile of the limiting surface changes in a variable curvature function.

3. The lift limiter according to claim 2, characterized in that, Define the contact starting point between the limiting surface and the valve plate as the origin, the direction away from the valve plate of the limiting part as the Y-axis, and the direction away from the fixing part of the limiting part as the X-axis; On the projection on the X-axis, the contact length between the limiting surface and the valve plate is t, and the total length of the valve plate is l v ; On the projection of the Y-axis, the contact height between the limiting surface and the valve plate is h; Then 4. The lift limiter according to claim 3, characterized in that, The distance from any point on the profile of the limiting surface to the X-axis is 0 mm - 1.9 mm.

5. The lift limiter according to any one of claims 1-4, characterized in that, The thickness of the fixing part is less than the thickness of the limiting part.

6. The lift limiter according to claim 5, characterized in that, The fixing part is hollow to form a fixing hole, and the fixing hole is used to connect the fixing part and the valve plate.

7. The lift limiter according to claim 5, characterized in that, A first convex platform in an arc shape protrudes from the side wall of the limiting part, and the first convex platform is located at one end of the limiting part away from the fixing part.

8. A valve body, characterized in that, It includes a valve plate and a lift limiter according to any one of claims 1-7, and the lift limiter is used to limit the stroke of the valve plate.

9. A compressor, characterized in that, It includes a valve body according to claim 8.

10. An air conditioner, characterized in that, It includes a compressor according to claim 9.

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