CN218760455U

CN218760455U - Compressor air suction structure and compressor comprising same

Info

Publication number: CN218760455U
Application number: CN202223169496.4U
Authority: CN
Inventors: 杨敏; 张骏
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-28
Anticipated expiration: 2032-11-29

Abstract

The utility model provides a compressor air suction structure and a compressor comprising the same, wherein the compressor air suction structure is used for introducing a refrigerant into a working cavity of an air cylinder, and the air suction structure comprises a first inner cavity and a second inner cavity which are communicated with each other along an air suction direction; the second inner chamber is a divergent structure along the air suction direction, the spread angle of the inner wall of the second inner chamber is theta, and the second inner chamber is provided with: 5 < theta <20 deg.. The utility model discloses a compressor suction structure can reduce the local resistance loss when the air current gets into the compressor working chamber effectively to improve compressor complete machine efficiency.

Description

Compressor air suction structure and compressor comprising same

Technical Field

The utility model relates to a compressor technical field, specifically speaking relates to a compressor suction structure reaches compressor including it.

Background

Under the guidance of the policy of 'double carbon', energy efficiency improvement is always a powerful direction for energy conservation. In the power consumption of the compressor, the flow resistance loss occupies one position. Flow resistance losses include on-way resistance losses and local resistance losses. The on-way resistance is a shear stress between fluid layers generated by the flow of the fluid along the solid wall surface, and the energy loss caused by the on-way resistance is called on-way resistance loss. The local resistance loss is a loss generated by a change in fluid boundary conditions in a local region, a collision of fluid particles, a vortex, and resistance generated by the flow of a fluid.

During the operation of the compressor, the suction and discharge resistance is two important factors influencing the efficiency of the compressor, and mainly from the inlet of the accumulator to the discharge of the compressor, the refrigerant flows through the path with a large number of sections, and each section change means the local resistance loss. Our design is to minimize the flow losses that occur when these cross-sectional changes occur.

According to the basic theory of fluid mechanics, the place where the sectional area changes most from the small section to the large section is often the place where the local resistance loss is the most, and the place where the sectional area changes more is just the place where the sectional area changes more. For different refrigerants, the loss at the position is different due to different flow velocities, and the loss is larger when the flow velocity is larger.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to those skilled in the art.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model aims to provide a compressor suction structure reaches compressor including it, this compressor suction structure can reduce the local resistance loss when the air current gets into the compressor working chamber effectively to improve compressor overall efficiency.

The utility model provides a first aspect of a compressor air suction structure, which is used for introducing a refrigerant into a working cavity of an air cylinder and is characterized in that,

the air suction structure comprises a first inner cavity and a second inner cavity which are communicated with each other along the air suction direction;

the second inner chamber is a divergent structure along the air suction direction, the spread angle of the inner wall of the second inner chamber is theta, and the second inner chamber is provided with: 5 < theta <20 deg..

According to the utility model discloses an according to the first aspect, state that the length L of second inner chamber along the direction of breathing in satisfies 0.1 L1 and is less than or equal to L and is less than or equal to 0.7 L1, wherein L1 is the total length of the structure of breathing in along the direction of breathing in.

According to a first aspect of the invention, the spread angle of the inner wall of the second inner chamber is θ, and there is 6 ° < θ <10 °.

According to the utility model discloses an in the first aspect, the length L of second inner chamber along the direction of breathing in satisfies 0.5L 1 and is less than or equal to L and is less than or equal to 0.7L 1, wherein L1 is the total length of the structure of breathing in along the direction of breathing in.

According to a first aspect of the invention, the diverging structure is a conical structure.

According to a first aspect of the present invention, the first inner chamber is a cylindrical structure; and the diameter of the cylindrical structure is consistent with that of the small opening end of the second inner cavity of the divergent structure.

According to the first aspect of the present invention, the air suction structure further comprises a third inner cavity disposed between the first inner cavity and the second inner cavity;

the diameter of the end of the third inner cavity connected with the first inner cavity is larger than that of the end of the third inner cavity connected with the second inner cavity.

According to the utility model discloses a first aspect, the third inner chamber is along the convergent structure of the direction of breathing in.

According to the utility model discloses a first aspect, the structure of gradually expanding includes two cylindricality through-holes, and the tip of two cylindricality through-holes is located the coplanar, all with first inner chamber is connected, and the partial inner chamber coincidence of two cylindricality through-holes communicates, forms the contained angle between the axis of two cylindricality through-holes and does the expansion angle.

According to the utility model discloses an aspect, the aperture of two cylindricality through-holes is the same.

According to a first aspect of the invention, the cross-section of the diverging structure in a plane parallel to its axis is conical and the cross-section in a plane perpendicular to its axis is kidney-shaped or gourd-shaped.

According to the utility model discloses a first aspect, the long limit direction of waist shape or calabash shape is on a parallel with the center pin direction of cylinder.

According to the utility model discloses a first aspect, the central axis of first inner chamber with the central axis coincidence of second inner chamber.

According to the utility model discloses a first aspect, the central axis perpendicular to compressor cylinder body of second inner chamber forms the inner wall of working chamber.

A second aspect of the present invention provides a compressor, including the compressor air suction structure.

According to the utility model discloses a second aspect, the structure of breathing in sets up the intermediate lamella between a plurality of cylinder bodies of cylinder body, cylinder cap or multi-cylinder compressor.

The utility model discloses a compressor suction structure can reduce the local resistance loss when the air current gets into the compressor working chamber effectively to improve compressor complete machine efficiency.

Drawings

Other features, objects, and advantages of the invention will be apparent from the following detailed description of non-limiting embodiments, which proceeds with reference to the accompanying drawings and which is incorporated in and constitutes a part of this specification, illustrating embodiments consistent with this application and together with the description serve to explain the principles of this application. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

Fig. 1 is a schematic structural view of a suction structure of a compressor according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view taken at AA of FIG. 1;

FIG. 3 is a graph of local loss factor for a getter structure having a diverging configuration;

fig. 4 is a schematic structural view of a suction structure of a compressor according to a second embodiment of the present invention;

FIG. 5 is a cross-sectional view taken at FIG. 4 AA;

fig. 6 is a schematic structural view of a suction structure of a compressor according to a third embodiment of the present invention;

fig. 7 and 8 are a sectional view and an internal structure view of a divergent structure of a third embodiment of the present invention, respectively.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Reference in the specification to expressions of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the specification. Furthermore, the particular features, structures, materials, or characteristics illustrated may be combined in any suitable manner in any one or more embodiments or examples. Moreover, the various embodiments or examples and features of the various embodiments or examples presented in this specification may be combined and combined by those skilled in the art without being mutually inconsistent.

Throughout the specification, when a device is referred to as being "connected" to another device, this includes not only the case of being "directly connected" but also the case of being "indirectly connected" with another element interposed therebetween. Terms representing relative spatial terms such as "lower", "upper", and the like may be used to more readily describe one element's relationship to another element as illustrated in the figures. Such terms are intended to include not only the meanings indicated in the drawings, but also other meanings or operations of the device in use. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "under" and "beneath" all include above and below. The device may be rotated 90 or other angles and the terminology representing relative space is also to be interpreted accordingly.

Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first interface, a second interface, etc. Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

Although not defined differently, including technical and scientific terms used herein, all terms have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. Terms defined in commonly used dictionaries are to be additionally interpreted as having meanings consistent with those of related art documents and the contents of the present prompts, and must not be excessively interpreted as having ideal or very formulaic meanings unless defined.

The utility model provides a compressor air suction structure and a compressor comprising the same, wherein the compressor air suction structure is used for introducing a refrigerant into a working cavity of an air cylinder, the air suction structure comprises a first inner cavity and a second inner cavity which are communicated with each other along the air suction direction; the second inner chamber is a divergent structure along the air suction direction, the spread angle of the inner wall of the second inner chamber is theta, and the second inner chamber is provided with: 5 < theta <20 deg.. The utility model discloses a compressor suction structure can reduce the local resistance loss when the air current gets into the compressor working chamber effectively to improve compressor complete machine efficiency.

The present invention will be further described with reference to the accompanying drawings and specific embodiments, it is understood that the embodiments are not intended to limit the scope of the present invention.

Fig. 1 and fig. 2 are the structural schematic diagram of the compressor air suction structure of the first embodiment of the present invention, the compressor air suction structure is used for introducing the refrigerant into the working cavity of the cylinder, in this embodiment, the air suction structure is disposed in the cylinder body 10 of the compressor as an example, the cylinder body 10 is provided with a working cavity a for forming the refrigerant compression working space and an air suction structure b for introducing the refrigerant, and generally, the working cavity a is enclosed by the inner wall 12 of the cylinder body 10 and the parts of the upper and lower end surfaces of the cylinder.

The air suction structure b penetrates through the side wall of the cylinder body 10 from the outer peripheral surface 11 of the cylinder body 10 along the radial direction and is communicated with the working cavity a;

the air suction structure b comprises a first inner cavity 131a and a second inner cavity 132a which are communicated with each other along the air suction direction (the direction of the dotted arrow in fig. 1); wherein, the second inner cavity 132a has a gradually expanding structure along the air suction direction.

Fig. 2 is a cross-sectional view of the first embodiment at the air suction structure, the first inner cavity 131a is a cylindrical structure, and the diameter of the cylindrical structure is uniform along the axial direction thereof. The gradually-expanding structure is a conical structure, that is, one end of the second inner cavity 132a of the gradually-expanding structure is a small-mouth end, the other end is a large-mouth section, and the small-mouth end is connected with the first inner cavity 131 a. Meanwhile, in this embodiment, the diameter of the cylindrical structure 131a is consistent with the diameter of the small opening end of the second inner cavity 132a of the divergent structure.

The central axis of the first lumen 131a may coincide with the central axis of the second lumen 132 a. In general, the air suction structure a is opened in a direction perpendicular to the end surface of the cylinder 10, and in this case, the central axis of the second inner cavity 132a or the first inner cavity 131a is perpendicular to the inner wall 12 of the cylinder 10 forming the working cavity a.

FIG. 3 is a graph of local loss factors of a getter structure having a divergent structure, in which the horizontal axis represents the divergent angle θ of the divergent structure and the vertical axis represents the ratio of the local loss factor of the transition tube to the local loss factor of the transition tube, and having:

wherein A1 and A1 are respectively the sectional areas of the first inner cavity and the second inner cavity, K is a local resistance factor, and V1 and V2 are respectively the airflow flow rates of the first inner cavity and the second inner cavity; g is the acceleration of gravity, h _m Is a local loss of resistance.

In the above formula, the larger the ratio is, the larger the local loss factor h _m I.e. the greater the loss of inspiratory resistance; conversely, the smaller the ratio, the local loss factor h _m I.e. the smaller the loss of resistance to inspiration. According to the above theory, in the air suction structure of the present invention, the spread angle of the inner wall of the second inner cavity 132a is θ, i.e. the spread angle θ of the divergent structure is set between 5 ° and 20 °, preferably, the spread angle θ of the inner wall of the second inner cavity 132a is set between 6 ° and 10 °, and most preferably, the spread angle θ is set to 8 °.

It should be noted that the air suction structure with the above structure may also be disposed on a cylinder cover of the compressor or an intermediate plate between a plurality of cylinder blocks of the multi-cylinder compressor, and in the description, the embodiment only takes the case of being disposed on a cylinder block of a compressor cylinder as an example, and the description of the embodiment of the intermediate plate disposed on a cylinder cover of a compressor or between a plurality of cylinder blocks of a multi-cylinder compressor is omitted.

The utility model discloses a suction structure through the rational design structure, especially designs the expansion angle of second inner chamber, can effectively reduce the resistance loss of breathing in, arouses the suction chamber pressure to rise, and the compression consumption reduces to make compressor efficiency obtain improving.

Fig. 4 is a schematic structural diagram of a suction structure of a compressor according to a second embodiment of the present invention, wherein the suction structure further includes a third inner cavity 133b disposed between the first inner cavity 131b and the second inner cavity 132 b; the diameter of the end of the third inner cavity 133b connected to the first inner cavity 131b is larger than the diameter of the end of the third inner cavity 133b connected to the second inner cavity 132b, that is, the third inner cavity 131b is a tapered structure along the suction direction. See fig. 5 for a cross-sectional view of the getter structure; in the second embodiment, the divergent angle θ of the inner wall of the second inner cavity 132b may also be set between 5 ° and 20 °, preferably, the divergent angle θ of the inner wall of the second inner cavity 132b is between 6 ° and 10 °, and most preferably, the divergent angle θ is set to 8 °.

Fig. 6 is a schematic structural diagram of a compressor air suction structure according to a third embodiment of the present invention, wherein the air suction structure further includes a third inner cavity 133c disposed between the first inner cavity 131c and the second inner cavity 132c, the first inner cavity 131c, the second inner cavity 132c, and the third inner cavity 133c may have the same structure as the second embodiment, and the second inner cavity 132c of the third embodiment has a different structure from the first embodiment. Fig. 7 is a cross-sectional view of a divergent structure according to a third embodiment of the present invention, wherein the divergent structure can be regarded as a channel formed by two cylindrical through holes 1322 on a cylinder, the end portions of the two cylindrical through holes are located on the same plane, i.e., the small end 1321 of the second inner cavity 132c is connected to the first inner cavity 131c, the partial inner cavities of the two cylindrical through holes 1322 are overlapped and communicated, the two cylindrical through holes 1322 are communicated with each other, and a tapered surface 1323 is shown at the position where the two cylindrical through holes 1322 are communicated with each other, and an included angle is formed between the axes of the two cylindrical through holes as the expansion angle. In the third embodiment, the small end of the second inner cavity 132c is different from the structure of the end of the third inner cavity 133c connected thereto, i.e. the small end 1321 of the second inner cavity 132c is smaller than the size of the third inner cavity 133 c. Of course, in other embodiments, the small end 1321 of the second lumen 132c can be directly connected to the first lumen. Meanwhile, the two cylindrical through holes 1322 of the third embodiment have the same hole diameter. The section of the divergent structure on a plane parallel to the axis of the divergent structure is conical, and the section of the divergent structure on a plane perpendicular to the axis of the divergent structure is kidney-shaped or gourd-shaped. The long side direction of the waist shape or the gourd shape is parallel to the central axis direction of the cylinder. It should be noted that the cross section of the small end 1321 of the second inner cavity 132c on the plane perpendicular to the axis thereof may be other shapes, which are not limited herein, but the size of the end of the second inner cavity connected with the working cavity a is larger than that of the other end. If the section of the small opening end of the second inner cavity on the plane vertical to the axis of the second inner cavity can be quadrilateral, the second inner cavity is of a trapezoidal structure, and the quadrilateral at one end of the second inner cavity, which is connected with the working cavity a, is larger than the quadrilateral at the small opening end. The divergent angle of the divergent structure of the second lumen, i.e. the angle formed between the axes of the two cylindrical through holes, is still similar to the first or second embodiment.

In the above embodiment, the central axis of the first lumen and the central axis of the second lumen coincide. In an embodiment where the air suction structure is provided in the cylinder body, the central axis of the second inner cavity is arranged perpendicular to the inner wall of the cylinder body forming the working cavity. Thereby reducing local resistance loss when air flow enters the working chamber of the compressor

In order to make the air suction structure further effectively reduce the local resistance loss when the air flow enters the working cavity of the compressor, the length L of the second inner cavity along the air suction direction satisfies 0.1X L1 and L0.7X L1, wherein L1 is the total length of the air suction holes along the air suction direction, preferably, the length L of the second inner cavity along the air suction direction satisfies 0.5X L1 and L0.7X L1, and if the length L of the second inner cavity along the air suction direction is set to be 0.52L1.

The utility model also provides a compressor, include the compressor structure of breathing in, the structure of breathing in sets up the intermediate lamella between a plurality of cylinder bodies of cylinder body, cylinder cap or multi-cylinder compressor. Because the air suction structure of the air cylinder effectively reduces the local resistance loss when the air flow enters the working cavity of the compressor, the whole efficiency of the compressor is improved.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A compressor suction structure is used for introducing a refrigerant into a working cavity of an air cylinder and is characterized in that,

2. The compressor suction structure according to claim 1, wherein a length L of the second inner cavity in the suction direction satisfies 0.1 x L1 ≦ L ≦ 0.7 x L1, where L1 is a total length of the suction structure in the suction direction.

3. Compressor suction structure, according to claim 1, characterized in that the divergence angle of the inner wall of said second inner chamber is θ, and there is 6 ° < θ <10 °.

4. The compressor suction structure according to claim 2, wherein a length L of the second inner cavity in the suction direction satisfies 0.5 x L1 ≦ L ≦ 0.7 x L1, where L1 is a total length of the suction structure in the suction direction.

5. A compressor suction structure according to claim 1 or 2, characterized in that said diverging structure is a conical structure.

6. The compressor suction structure as claimed in claim 5, wherein the first inner chamber is a cylindrical structure; and the diameter of the cylindrical structure is consistent with that of the small opening end of the second inner cavity of the divergent structure.

7. The compressor suction structure as claimed in claim 5, further comprising a third inner chamber disposed between the first inner chamber and the second inner chamber;

8. The compressor suction structure as claimed in claim 7, wherein the third inner cavity is a tapered structure in a suction direction.

9. The suction structure of a compressor as claimed in claim 1 or 2, wherein the diverging structure includes two cylindrical through holes, ends of the two cylindrical through holes are located on the same plane and are connected to the first inner cavity, partial inner cavities of the two cylindrical through holes overlap and communicate with each other, and an included angle formed between axes of the two cylindrical through holes is the expansion angle.

10. The compressor suction structure as claimed in claim 9, wherein the two cylindrical through holes have the same diameter.

11. A compressor suction structure according to claim 9, wherein said diverging structure has a tapered cross-section in a plane parallel to its axis and a kidney-shaped or gourd-shaped cross-section in a plane perpendicular to its axis.

12. The suction structure of a compressor as claimed in claim 11, wherein the lengthwise direction of the kidney or gourd shape is parallel to the central axis direction of the cylinder.

13. The compressor suction structure as claimed in claim 1, wherein the central axis of the first inner chamber and the central axis of the second inner chamber coincide.

14. The compressor suction structure as claimed in claim 1, wherein a central axis of the second inner chamber is perpendicular to a compressor cylinder to form an inner wall of the working chamber.

15. A compressor comprising a suction structure of a compressor as claimed in any one of claims 1 to 14.

16. The compressor of claim 15, wherein the suction structure is provided to a cylinder block, a cylinder head, or an intermediate plate between a plurality of blocks of a multi-cylinder compressor.