CN112253460A

CN112253460A - Compressor

Info

Publication number: CN112253460A
Application number: CN202011157708.XA
Authority: CN
Inventors: 魏会军; 胡艳军; 阙沛祯; 董辉
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-01-22

Abstract

The present invention provides a compressor, comprising: a housing; the crankshaft is arranged in the shell; the crankshaft penetrates through the low pressure cylinder and the high pressure cylinder, and the low pressure cylinder is positioned on one side of the high pressure cylinder, which is close to a motor of the compressor; wherein, be provided with a plurality of welding point groups between low pressure jar and the shell, a plurality of welding point groups all have a plurality of welding points along the axial interval arrangement of the outer peripheral face of low pressure jar, a plurality of welding points along the circumference interval arrangement of the outer peripheral face of low pressure jar to make low pressure jar and shell welding. The compressor solves the problem that the vibration and the noise of the pump body of the compressor in the prior art are large.

Description

Compressor

Technical Field

The invention relates to the field of compressors, in particular to a compressor.

Background

The rolling rotor type double-stage enthalpy-increasing compressor is more and more concerned by the industry due to the outstanding advantages of simple structure, large operation pressure ratio, high reliability and the like, and the application range and the application depth of the rolling rotor type double-stage enthalpy-increasing compressor are continuously expanded. Users propose to develop a larger displacement two-stage compressor.

The double-stage compressor in the prior art is provided with a low-pressure cylinder and a high-pressure cylinder simultaneously, the low-pressure cylinder is arranged below the high-pressure cylinder along the vertical direction, the total displacement of the compressor is determined by the displacement of the low-pressure cylinder, and the common double-cylinder compressor is also provided with two compression cylinders, wherein the total displacement of the common double-cylinder compressor is the sum of the displacements of the two compression cylinders. The displacement of the two-stage compressor has a natural disadvantage compared to the displacement of a conventional two-cylinder compressor when the compressor housing has the same diameter.

At present, there are two main methods for increasing the displacement of the two-stage compressor: one method is to increase the diameter of the compressor shell so as to increase the displacement of the compressor, and the method has less technical difficulty, but can cause the problems of volume increase, cost increase and the like of the compressor; the other method is to increase the displacement of the compressor shell by increasing the height of the cylinder while keeping the diameter of the compressor shell unchanged, and the method increases the distance between two eccentric parts of the crankshaft and the stress of the eccentric parts, which leads to the increase of the deflection of the eccentric parts of the crankshaft and the reliability problems of abrasion between rollers and sliding sheets, between rollers and flanges, between rollers and partition plates, and the like.

At present, a pump body assembly and a shell of the double-stage compressor are generally welded together through an upper flange and the shell, when the displacement is small, the influence of the connection mode on the noise of the compressor is small, and when the displacement is large, the connection mode causes the vibration of the pump body of the compressor to be increased, the noise of the compressor is greatly increased, and the use comfort of the compressor is reduced. The reasons for the above problems are: the mass below the welding spot is increased, the gravity center of the pump body moves downwards, the natural frequency of the swing of the pump body is reduced, and the noise peak value is easier to excite in the low-frequency noise band; the increase of the discharge capacity of the compressor increases the gas resistance moment of the compressed refrigerant, and the excitation source generating noise is increased, so that the swing amplitude and the noise of the pump body are increased.

In order to solve the above problems, it is assumed that a set of welding spots are respectively disposed at the upper and lower ends of the pump body to improve the connection strength between the pump body and the housing, reduce the swing of the pump body, and achieve the purpose of reducing the noise of the compressor. In the structure, the upper flange and the lower flange are respectively provided with a group of welding spots, so that the pump body is firmly fixed in the shell, the natural frequency of the pump body can be improved, and the noise peak value generated by the swing of the pump body can be reduced.

However, this structure still has the problem, and moving part when compressing the refrigerant in the cylinder can make the cylinder receive the effect of gaseous power, and this effort is conducted to the upper flange again through the screw between upper and lower flange and cylinder, and when the discharge capacity is great, gaseous power is great, easily leads to the relative position relation between upper and lower flange and cylinder to remove, leads to the pump body card to die.

Specifically, after a set of solder joint on the upper flange is fixed the pump body and shell, the pump body is in the complete restraint state, increases a set of solder joint again on the lower flange after, the pump body will be in the overconstrained state, if the clearance between lower flange outer peripheral face and the shell inner wall is inhomogeneous this moment, can make the stress size of each solder joint different on the lower flange, easily lead to the relative position relation between upper and lower flange and cylinder to take place to remove, make the pump body card die, very easily cause the phenomenon that the solder joint of the pump body by lower flange department pulled partially. The lower flange is fixed on the pump body through screws, and can shift under the action of stress of welding spots, so that the pump body is clamped. In fact, the problem of uneven gaps between the outer peripheral surface of the lower flange and the inner wall of the shell is difficult to avoid due to the influence of machining precision and assembling precision, the uneven gaps cause different connection strengths generated by welding spots, and the stress generated when each welding spot is welded is different, so that the structure has more problems in practical use and is difficult to solve. The position relation of the upper flange and the lower flange which are assembled before welding deviates under the action of different radial forces, so that the performance of the compressor is influenced, and the pump body is possibly blocked due to the change of the position relation of moving parts in the pump body. Therefore, it is difficult to put it into practical use.

Disclosure of Invention

The invention mainly aims to provide a compressor, which aims to solve the problem that the vibration and noise of a compressor pump body in the prior art are large.

In order to achieve the above object, according to one aspect of the present invention, there is provided a compressor including: a housing; the crankshaft is arranged in the shell; the crankshaft penetrates through the low pressure cylinder and the high pressure cylinder, and the low pressure cylinder is positioned on one side of the high pressure cylinder, which is close to a motor of the compressor; wherein, be provided with a plurality of welding point groups between low pressure jar and the shell, a plurality of welding point groups all have a plurality of welding points along the axial interval arrangement of the outer peripheral face of low pressure jar, a plurality of welding points along the circumference interval arrangement of the outer peripheral face of low pressure jar to make low pressure jar and shell welding.

Furthermore, a plurality of low-pressure cylinder welding spot hole groups are arranged on the peripheral surface of the low-pressure cylinder, a plurality of shell welding spot hole groups are arranged on the shell, and the plurality of low-pressure cylinder welding spot hole groups and the plurality of shell welding spot hole groups are arranged in a one-to-one correspondence manner, so that a welding spot group is formed between each low-pressure cylinder welding spot hole group and the corresponding shell welding spot hole group; each low-pressure cylinder welding spot hole group comprises a plurality of low-pressure cylinder welding spot holes, each shell welding spot hole group comprises a plurality of shell welding spot holes, and a welding point is formed between each low-pressure cylinder welding spot hole and the corresponding shell welding spot hole.

Furthermore, the number of the low-pressure cylinder welding spot hole groups and the number of the shell welding spot hole groups are two, the two low-pressure cylinder welding spot hole groups are respectively a first welding spot hole group and a second welding spot hole group, the first welding spot hole group comprises a plurality of first welding spot holes, and the second welding spot hole group comprises a plurality of second welding spot holes.

Further, when the height H of the low pressure cylinder in the axial direction of the crankshaft satisfies 20mm < H <25mm, there are three first welding point holes in the first welding point hole group and three second welding point holes in the second welding point hole group.

Further, the diameter of each first welding point hole is D1, the diameter of each second welding point hole is D2, when the height H of the low pressure cylinder along the axial direction of the crankshaft is 20mm < H <25mm, 4mm < D1 < 6mm, and D1 is D2.

Furthermore, the hole center line of each first welding point hole is located in a first plane, the hole center line of each second welding point hole is located in a second plane, the distance between the first plane and the end face, close to the motor, of the low pressure cylinder is H1, the distance between the second plane and the end face, close to the high pressure cylinder, of the low pressure cylinder is H2, when the height H of the low pressure cylinder in the axial direction of the crankshaft is more than 20mm and less than H and less than 25mm, the height H is more than or equal to 5mm and less than or equal to H1 and less than or equal to 10mm, and the height H is more than or equal to 5mm and less than or equal.

Furthermore, a plurality of first welding point holes are arranged at intervals along the circumferential direction of the outer circumferential surface of the low-pressure cylinder, a plurality of second welding point holes and a plurality of first welding point holes are arranged in a one-to-one correspondence mode, in the same projection plane perpendicular to the axis of the crankshaft, the included angle between the projection line of the hole center line of each first welding point hole and the projection line of the hole center line of the corresponding second welding point hole is alpha, and when the height H of the low-pressure cylinder in the axis direction of the crankshaft is more than 20mm and less than H and less than 25mm, the alpha is more than or equal to 50 degrees and less than or equal to 70 degrees.

Further, when the height H of the low-pressure cylinder in the axial direction of the crankshaft meets the requirement that H is larger than or equal to 25mm, six first welding point holes are formed in the first welding point hole group, and when the height H of the second welding point hole group in the axial direction of the crankshaft meets the requirement that H is larger than or equal to 25mm, D1 is larger than or equal to 6mm and smaller than or equal to 10mm, and D1 is equal to D2.

Furthermore, the hole center line of each first welding point hole is located in a first plane, the hole center line of each second welding point hole is located in a second plane, the distance between the first plane and a first end face of the low pressure cylinder, which is far away from the high pressure cylinder, is H1, the distance between the second plane and a second end face of the low pressure cylinder, which is close to the high pressure cylinder, is H2, when the height H of the low pressure cylinder along the axial direction of the crankshaft is more than or equal to H25 mm, 6mm is more than or equal to H1 and less than or equal to 12mm, and 6mm is more than or equal to H2 and less than or equal to 12 mm.

Further, when the height H of the low-pressure cylinder in the axial direction of the crankshaft meets the condition that H is larger than or equal to 25mm, the plurality of first welding point holes are arranged at intervals in the circumferential direction of the outer peripheral surface of the low-pressure cylinder, the plurality of second welding point holes and the plurality of first welding point holes are arranged in a one-to-one correspondence mode, and in the same projection plane perpendicular to the axial line of the crankshaft, the projection line of the hole center line of each second welding point hole is overlapped with the projection line of the hole center line of the corresponding first welding point hole.

Further, when the height H of the low-pressure cylinder in the axial direction of the crankshaft meets the condition that H is larger than or equal to 25mm, the plurality of first welding point holes comprise a first welding point hole I, a first welding point hole II, a first welding point hole III, a first welding point hole IV, a first welding point hole V and a first welding point hole VI which are sequentially arranged at intervals in the circumferential direction of the outer circumferential surface of the low-pressure cylinder, wherein the first welding point hole I, the first welding point hole III and the first welding point hole V are uniformly distributed in the circumferential direction of the outer circumferential surface of the low-pressure cylinder; the first welding point hole II, the first welding point hole IV and the first welding point hole VI are uniformly distributed along the circumferential direction of the outer circumferential surface of the low pressure cylinder; the included angle between the first welding point hole I and the second welding point hole II is beta, and the value range of the beta is as follows: beta is more than or equal to 50 degrees and less than or equal to 70 degrees.

By applying the technical scheme, the compressor comprises a shell, a crankshaft, a low-pressure cylinder and a high-pressure cylinder, wherein the crankshaft is arranged on the low-pressure cylinder and the high-pressure cylinder in a penetrating manner, the crankshaft, the low-pressure cylinder and the high-pressure cylinder are all positioned in the shell, and the low-pressure cylinder is positioned on one side, close to a motor of the compressor, of the high-pressure cylinder; wherein, be provided with a plurality of welding point groups between low pressure cylinder and the shell, each welding point group all has a plurality of welding points, and a plurality of welding point groups are arranged along the axial interval of the outer peripheral face of low pressure cylinder, and a plurality of welding points are arranged along the circumference interval of the outer peripheral face of low pressure cylinder to make low pressure cylinder and shell welding. According to the technical scheme, in the specific implementation process, only the gap between the outer peripheral surface of the low-pressure cylinder and the inner wall surface of the shell is controlled, the implementation difficulty is greatly reduced, the problems of high noise and difficulty in reduction caused by pump body swinging are solved, and the problems that the pump body is blocked and the functions of the pump body assembly are difficult to realize due to the fact that welding points are located on different parts are also solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of a first embodiment of a compressor according to the present invention;

fig. 2 is a schematic view showing an internal structure of the compressor shown in fig. 1;

FIG. 3 is a schematic view of the construction of the low pressure cylinder of the compressor shown in FIG. 2;

FIG. 4 illustrates a front view of the low pressure cylinder of the compressor shown in FIG. 3;

FIG. 5 illustrates a top view of the low pressure cylinder of the compressor shown in FIG. 3;

FIG. 6 illustrates a cross-sectional view of the low pressure cylinder shown in FIG. 4 taken along the direction E-E;

FIG. 7 illustrates a cross-sectional view of the low pressure cylinder shown in FIG. 4 taken along the direction F-F;

FIG. 8 shows a cross-sectional view in the direction G-G of the compressor shown in FIG. 2;

FIG. 9 shows a cross-sectional view taken along the direction H-H of the compressor shown in FIG. 2;

fig. 10 shows a schematic construction of a second embodiment of a compressor according to the present invention;

fig. 11 is a schematic view showing an internal structure of the compressor shown in fig. 10;

fig. 12 is a schematic view showing a structure of a low pressure cylinder of the compressor shown in fig. 11;

FIG. 13 illustrates a front view of the low pressure cylinder of the compressor shown in FIG. 12;

FIG. 14 illustrates a cross-sectional view of the low pressure cylinder of FIG. 13 taken along the direction M-M;

FIG. 15 illustrates a cross-sectional view of the low pressure cylinder shown in FIG. 13 in the N-N direction;

FIG. 16 shows a cross-sectional view taken along the direction J-J of the compressor shown in FIG. 11;

FIG. 17 shows a cross-sectional view taken along the direction K-K of the compressor shown in FIG. 11;

FIG. 18 is a graph showing the amplitude-frequency response of the pump body assembly along the radial direction as a function of load frequency for a compressor using a single layer of solder joint in the prior art and a compressor using a double layer of solder joint in the present invention under the same load; and

FIG. 19 is a graph showing a comparison of the total noise level within 1kHz for a prior art compressor using a single layer weld and a compressor of the present invention using a double layer weld operating under the same operating conditions.

Wherein the figures include the following reference numerals:

1. a crankshaft; 2. a low pressure cylinder; 3. a high pressure cylinder; 120. a low pressure cylinder welding spot hole group; 10. a first group of solder joint holes; 11. a first welding point hole I; 12. a second first welding point hole; 13. a first solder joint hole III; 14. a fourth first solder joint hole; 15. a first solder joint hole five; 16. a first solder joint hole six; 20. a second group of solder joint holes; 21. a first second welding point hole; 22. a second welding spot hole II; 23. a second solder joint hole III; 24. a fourth second solder joint hole; 25. a second solder joint hole V; 26. a second solder joint hole six; 340. a shell welding spot hole group; 30. a third group of solder joint holes; 31. a first third welding point hole; 32. a second third solder joint hole; 33. a third solder joint hole III; 34. a third solder joint hole four; 35. a third solder joint hole five; 36. a third solder joint hole six; 40. a fourth group of solder joint holes; 41. a fourth solder joint hole I; 42. a fourth solder joint hole II; 43. a fourth solder hole III; 44. a fourth solder hole four; 45. a fourth solder joint hole v; 46. a fourth solder joint hole six; 100. a housing.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 17, the present invention provides a compressor including: a housing 100; a crankshaft 1, the crankshaft 1 being disposed within the housing 100; the compressor comprises a low pressure cylinder 2 and a high pressure cylinder 3, wherein a crankshaft 1 penetrates through the low pressure cylinder 2 and the high pressure cylinder 3, and the low pressure cylinder 2 is positioned on one side of the high pressure cylinder 3 close to a motor of the compressor; wherein, be provided with a plurality of welding point groups between low pressure cylinder 2 and shell 100, a plurality of welding point groups are arranged along the axial interval of the outer peripheral face of low pressure cylinder 2, and each welding point group all has a plurality of welding points, and a plurality of welding points are arranged along the circumference interval of the outer peripheral face of low pressure cylinder 2 to make low pressure cylinder 2 and shell 100 weld.

The compressor comprises a shell 100, a crankshaft 1, a low-pressure cylinder 2 and a high-pressure cylinder 3, wherein the crankshaft 1 is arranged on the low-pressure cylinder 2 and the high-pressure cylinder 3 in a penetrating mode, the crankshaft 1, the low-pressure cylinder 2 and the high-pressure cylinder 3 are all located in the shell 100, and the low-pressure cylinder 2 is located on one side, close to a motor of the compressor, of the high-pressure cylinder 3; wherein, be provided with a plurality of welding point groups between low pressure cylinder 2 and shell 100, each welding point group all has a plurality of welding points, and a plurality of welding point groups are arranged along the axial interval of the outer peripheral face of low pressure cylinder 2, and a plurality of welding points are arranged along the circumference interval of the outer peripheral face of low pressure cylinder 2 to make low pressure cylinder 2 and shell 100 weld. In the specific implementation process of the technical scheme, only the gap between the outer peripheral surface of the low pressure cylinder 2 and the inner wall surface of the shell needs to be controlled, the implementation difficulty is greatly reduced, the problems of high noise and difficulty in reduction caused by pump body swinging are solved, and the problems that the pump body is blocked and the functions of the pump body assembly are difficult to realize due to the fact that welding points are located on different parts are also solved.

The low-pressure cylinder 2 in the compressor has larger displacement and larger mass, and the pump body structure is fixed by welding the low-pressure cylinder 2 and the shell 100, so that the mass below a welding point is smaller, the modal resonance frequency is higher, resonance is not easy to cause in the low-pressure operation process, and the vibration and noise during the operation are also smaller. In addition, the mass of the upper eccentric part of the crankshaft 1 is larger than that of the lower eccentric part, so that the dynamic and static balance of the crankshaft 1 is facilitated, the deflection of the crankshaft 1 can be reduced, and the reliability of the crankshaft 1 is improved.

Specifically, a plurality of low-pressure cylinder welding spot hole groups 120 are arranged on the outer peripheral surface of the low-pressure cylinder 2, a plurality of shell welding spot hole groups 340 are arranged on the shell 100, and the plurality of low-pressure cylinder welding spot hole groups 120 and the plurality of shell welding spot hole groups 340 are arranged in a one-to-one correspondence manner, so that a welding spot group is formed between each low-pressure cylinder welding spot hole group 120 and the corresponding shell welding spot hole group 340; each low pressure cylinder weld spot hole set 120 includes a plurality of low pressure cylinder weld spot holes, each shell weld spot hole set 340 includes a plurality of shell weld spot holes, and a weld is formed between each low pressure cylinder weld spot hole and the corresponding shell weld spot hole.

Each set of welding points includes a set of low pressure cylinder weld point holes 120 located on low pressure cylinder 2 and a set of shell weld point holes 340 located on shell 100, and each welding point includes a set of low pressure cylinder weld point holes located on low pressure cylinder 2 and a set of shell weld point holes located on shell 100. Each of the housing solder joint holes is coaxially disposed with each of the low pressure cylinder solder joint holes, respectively, so that solder can enter the corresponding low pressure cylinder solder joint hole on the low pressure cylinder 2 through each of the housing solder joint holes on the housing 100, thereby welding the housing 100 and the low pressure cylinder 2 together.

Preferably, there are two low-pressure cylinder welding point hole sets 120 and two housing welding point hole sets 340, the two low-pressure cylinder welding point hole sets 120 are a first welding point hole set 10 and a second welding point hole set 20 respectively, the first welding point hole set 10 includes a plurality of first welding point holes, and the second welding point hole set 20 includes a plurality of second welding point holes.

The low pressure cylinder 2 is an eccentric circular structure and comprises an outer circular surface and an inner circular surface. The inner circular surface is internally provided with a roller and a slide sheet so as to form an air suction cavity and a compression cavity in the inner circular surface, and the outer circular surface is in clearance fit with the inner wall surface of the shell 100. Two low-pressure cylinder welding point hole groups 120, namely a first welding point hole group 10 and a second welding point hole group 20, are arranged on the outer circumferential surface of the low-pressure cylinder 2 at intervals, the first welding point hole group 10 and the second welding point hole group 20 are arranged at intervals along the axial direction of the crankshaft 1, the first welding point hole group 10 comprises a plurality of first welding point holes arranged at intervals along the circumferential direction of the outer circumferential surface of the low-pressure cylinder 2, the second welding point hole group 20 comprises a plurality of second welding point holes arranged at intervals along the circumferential direction of the outer circumferential surface of the low-pressure cylinder 2, the number of the first welding point holes and the number of the second welding point holes are the same, the hole center lines of the first welding point holes are all located in the same plane, and the hole center lines of the second welding point holes are all located in the same plane.

Accordingly, two housing solder hole sets 340, i.e., the third solder hole set 30 and the fourth solder hole set 40, are correspondingly disposed on the housing 100. The third solder hole group 30 includes a plurality of third solder holes, the plurality of third solder holes are disposed in one-to-one correspondence with the plurality of first solder holes, the fourth solder hole group 40 includes a plurality of fourth solder holes, the plurality of fourth solder holes are disposed in one-to-one correspondence with the plurality of second solder holes, so-called correspondence means that each solder hole on the housing 100 is coaxially disposed with each solder hole on the low pressure cylinder 2, so as to ensure that solder can enter the solder hole on the corresponding low pressure cylinder 2 through each solder hole on the housing 100.

The first welding spot hole group 10 and the second welding spot hole group 20 are arranged at intervals along the axial direction of the crankshaft 1, and when the pump body assembly receives acting force along the radial direction of the low-pressure cylinder 2, welding points formed by welding the two groups of welding spot holes can mutually serve as fulcrums to resist the acting force along the radial direction of the low-pressure cylinder 2, so that the swing amplitude of the pump body assembly along the radial direction of the low-pressure cylinder 2 is reduced. Meanwhile, the pump body assembly is restrained in the shell 100, the rigidity is higher, the natural frequency is improved, and the noise peak value increase caused by the resonance of the pump body assembly can be avoided to the greatest extent. As can be seen from the mechanical formula M ═ FL (the moment M is equal to the product of the force F and the moment arm L), the greater the distance between the first welding point hole group 10 and the second welding point hole group 20 along the axial direction of the crankshaft 1, the longer the moment arm L, the stronger the ability of the pump body assembly to resist the swing along the radial direction, and the better the noise reduction effect.

For the above reasons, the larger the height of the low pressure cylinder 2 is, the more advantageous the distance between the first and second

weld hole groups

10 and 20 is, and the more advantageous the noise of the compressor is. However, since the weight of the low pressure cylinder 2 increases due to the increase in the height of the low pressure cylinder 2, the load also increases, thereby causing problems such as increase in frictional power consumption, reduction in performance, and the like, and limitations due to various factors. Therefore, in the case that the structural size of the low pressure cylinder 2 allows the low pressure cylinder 2 to be reduced in height, the reduction in height of the low pressure cylinder 2 is beneficial to improving the overall performance of the compressor, but the structure of arranging the first welding point hole group 10 and the second welding point hole group 20 on the low pressure cylinder 2 is limited by the height size, and therefore, the first welding point hole and the second welding point hole need to be staggered by a certain angle in the circumferential direction; if the height of the low pressure cylinder 2 has to be increased to a certain value, each first solder hole should be located directly above the corresponding second solder hole.

The present invention arranges the first and second welding

point hole groups

10 and 20 in the following two cases according to the difference in height of the low pressure cylinder 2.

As shown in fig. 1 to 9, in the first embodiment of the present invention, the height H of the low pressure cylinder 2 satisfies: h <25mm < 20mm, the arrangement of the first and second solder hole sets 10 and 20 is as follows:

as shown in fig. 5, when the height H of the low pressure cylinder 2 in the axial direction of the crankshaft 1 satisfies 20mm < H <25mm, there are three first pad holes in the first pad hole group 10 and three second pad holes in the second pad hole group 20.

The first welding point hole group 10 on the low pressure cylinder 2 has three first welding point holes, the second welding point hole group 20 has three second welding point holes, the corresponding third welding point hole group 30 on the housing 100 has three third welding point holes, and the fourth welding point hole group 40 has three fourth welding point holes.

As shown in fig. 5 to 7, each of the first weld hole and the second weld hole has a diameter D1 and D2, respectively, and when the height H of the low pressure cylinder 2 in the axial direction of the crankshaft 1 satisfies 20mm < H <25mm, 4mm ≦ D1 ≦ 6mm, and D1 ≦ D2.

The diameter of each of the first and second

solder hole groups

10 and 20 is equal, that is, D1 is D2, and the diameter ranges from: d is more than or equal to 4mm and less than or equal to 6 mm.

As shown in fig. 2 and 4, the hole center line of each first welding point hole is located in a first plane, the hole center line of each second welding point hole is located in a second plane, the distance between the first plane and the end surface of the low pressure cylinder 2 close to the motor is H1, the distance between the second plane and the end surface of the low pressure cylinder 2 close to the high pressure cylinder 3 is H2, when the height H of the low pressure cylinder 2 along the axial direction of the crankshaft 1 is more than 20mm and less than H <25mm, 5mm and less than H1 and less than 10mm, and 5mm and less than H2 and less than 10 mm.

The hole axes of the three first solder hole in the first solder hole group 10 are all located in the first plane a, and the hole axes of the three first solder hole in the second solder hole group 20 are all located in the second plane B. The first plane A is located on one side, close to the motor, of the second plane B, the distance between the first plane A and the end face, close to the motor, of the low-pressure cylinder 2 (namely the upper end face of the low-pressure cylinder 2) is h1, the distance between the second plane B and the end face, close to the high-pressure cylinder 3, of the low-pressure cylinder 2 (namely the lower end face of the low-pressure cylinder 2) is h2, in order to increase the distance between the first welding spot hole group 10 and the second welding spot hole group 20 to the maximum extent and avoid welding differences caused by the fact that the distance between the first welding spot hole group 10 and the upper end face and the distance between the second welding spot hole group 20 and the lower end face are too small, the requirements that h1 is greater than or equal to 5mm and less than or equal to 10mm and h2 is greater than or.

As shown in fig. 5, the plurality of first welding point holes are arranged at intervals in the circumferential direction of the outer peripheral surface of the low pressure cylinder 2, the plurality of second welding point holes are arranged in one-to-one correspondence with the plurality of first welding point holes, an included angle between a projection line of a hole center line of each first welding point hole and a projection line of a hole center line of a corresponding second welding point hole is α in the same projection plane perpendicular to the axis of the crankshaft 1, and when the height H of the low pressure cylinder 2 in the axial direction of the crankshaft 1 satisfies 20mm < H <25mm, α is not less than 50 ° and not more than 70 °.

Because the value range of the height H of the low pressure cylinder 2 is 20mm < H <25mm, the height is low, the structure of two welding spot hole groups arranged on the low pressure cylinder 2 is limited by the height dimension H, therefore, the hole center line of each first welding spot hole and the hole center line of the corresponding second welding spot hole are required to be staggered by a certain angle alpha along the circumferential direction of the peripheral surface of the low pressure cylinder 2, wherein the alpha is more than or equal to 50 degrees and less than or equal to 70 degrees.

Thus, in the first embodiment of the present invention, the plurality of first welding point holes include the first welding point holes 11, the second welding point holes 12, and the third welding point holes 13 that are sequentially arranged at intervals in the circumferential direction of the outer circumferential surface of the low pressure cylinder 2, and an included angle between two adjacent welding point holes is 120 °; the plurality of second welding spot holes comprise a first welding spot hole 21, a second welding spot hole 22 and a third welding spot hole 23 which are sequentially arranged at intervals along the circumferential direction of the outer circumferential surface of the low pressure cylinder 2, and an included angle between every two adjacent welding spot holes is 120 degrees; in the same projection plane perpendicular to the axis of the crankshaft 1, an included angle between a projection line of a hole center line of the first welding point hole 11 and a projection line of a hole center line of the second welding point hole 21 is alpha, an included angle between a hole center line of the first welding point hole 12 and a hole center line of the second welding point hole 22 is alpha, an included angle between a hole center line of the first welding point hole third 13 and a hole center line of the second welding point hole third 23 is alpha, and the value range of alpha is as follows: beta is more than or equal to 50 degrees and less than or equal to 70 degrees.

Correspondingly, as shown in fig. 8 and 9, the plurality of third solder hole on the housing includes a first third solder hole 31, a second third solder hole 32 and a third solder hole 33, and the plurality of fourth solder hole includes a first fourth solder hole 41, a second fourth solder hole 42 and a third fourth solder hole 43, wherein the first third solder hole 31, the second third solder hole 32 and the third solder hole 33 are respectively disposed corresponding to the first solder hole 11, the first solder hole 12 and the third solder hole 13, and the first fourth solder hole 41, the second fourth solder hole 42 and the third solder hole 43 are respectively disposed corresponding to the second solder hole 21, the second solder hole 22 and the third solder hole 23.

As shown in fig. 10 to 17, in the second embodiment of the present invention, the height H of the low pressure cylinder 2 satisfies: h is more than or equal to 25mm, and the arrangement conditions of the first welding spot hole group 10 and the second welding spot hole group 20 are as follows:

as shown in FIGS. 14 and 15, when the height H of the low pressure cylinder 2 in the axial direction of the crankshaft 1 satisfies H.gtoreq.25 mm, six first weld holes are provided in the first weld hole group 10, and six second weld holes are provided in the second weld hole group 20.

The first welding point hole group 10 on the low pressure cylinder 2 has six first welding point holes, the second welding point hole group 20 has six second welding point holes, the corresponding third welding point hole group 30 on the casing 100 has six third welding point holes, and the fourth welding point hole group 40 has six fourth welding point holes.

As shown in fig. 14 and 15, the diameter of each first weld hole is D1, the diameter of each second weld hole is D2, and when the height H of the low pressure cylinder 2 in the axial direction of the crankshaft 1 satisfies H ≧ 25mm, 6mm ≦ D1 ≦ 10mm, and D1 ≦ D2.

The diameter of each of the first and second

solder hole groups

10 and 20 is equal, that is, D1 is D2, and the diameter ranges from: d1 is more than or equal to 6mm and less than or equal to 10 mm.

As shown in fig. 13, the hole center line of each first welding point hole is located in a first plane, the hole center line of each second welding point hole is located in a second plane, the distance between the first plane and the first end surface of the low pressure cylinder 2 on the side far away from the high pressure cylinder 3 is H1, the distance between the second plane and the second end surface of the low pressure cylinder 2 on the side near the high pressure cylinder 3 is H2, when the height H of the low pressure cylinder 2 along the axial direction of the crankshaft 1 is equal to or greater than H25 mm, H1 is equal to or less than 6mm and equal to 12mm, and H2 is equal to or less than 6mm and equal to or less than 12 mm.

The hole axes of the six first solder hole in the first solder hole group 10 are all located in the first plane a, and the hole axes of the six first solder hole in the second solder hole group 20 are all located in the second plane B. The first plane A is located on one side, close to the motor, of the second plane B, the distance between the first plane A and the end face, close to the motor, of the low-pressure cylinder 2 (namely the upper end face of the low-pressure cylinder 2) is h1, the distance between the second plane B and the end face, close to the high-pressure cylinder 3, of the low-pressure cylinder 2 (namely the lower end face of the low-pressure cylinder 2) is h2, in order to increase the distance between the first welding spot hole group 10 and the second welding spot hole group 20 to the maximum extent and avoid welding differences caused by the fact that the distance between the first welding spot hole group 10 and the upper end face and the distance between the second welding spot hole group 20 and the lower end face are too small, the requirements that h1 is greater than or equal to 6mm and less than or equal to 12mm and h2 is greater than or.

As shown in fig. 14 and 15, when the height H of the low pressure cylinder 2 in the axial direction of the crankshaft 1 satisfies H ≧ 25mm, a plurality of first weld holes are arranged at intervals in the circumferential direction of the outer peripheral surface of the low pressure cylinder 2, a plurality of second weld holes are provided in one-to-one correspondence with the plurality of first weld holes, and the projection line of the hole center line of each second weld hole coincides with the projection line of the hole center line of the corresponding first weld hole in the same projection plane perpendicular to the axial line of the crankshaft 1. Namely, when the height H of the low pressure cylinder 2 is more than or equal to 25mm, each first welding point hole is positioned right above the corresponding second welding point hole.

As shown in fig. 14, when the height H of the low pressure cylinder 2 in the axial direction of the crankshaft 1 satisfies H ≥ 25mm, the plurality of first welding point holes include a first welding point hole 11, a second welding point hole 12, a third welding point hole 13, a fourth welding point hole 14, a fifth welding point hole 15 and a sixth welding point hole 16 which are sequentially arranged at intervals in the circumferential direction of the outer circumferential surface of the low pressure cylinder 2, wherein the first welding point hole 11, the third welding point hole 13 and the fifth welding point hole 15 are uniformly distributed in the circumferential direction of the outer circumferential surface of the low pressure cylinder 2; the second first welding point hole 12, the fourth first welding point hole 14 and the sixth first welding point hole 16 are uniformly distributed along the circumferential direction of the outer circumferential surface of the low pressure cylinder 2; an included angle between the first welding point hole I11 and the second welding point hole II 12 is beta, and the value range of the beta is as follows: beta is more than or equal to 50 degrees and less than or equal to 70 degrees.

In this way, in the first welding point hole I11, the first welding point hole III 13 and the first welding point hole V15, the included angle between two adjacent first welding point holes is 120 degrees; in the second first welding point hole 12, the fourth first welding point hole 14 and the sixth first welding point hole 16, the included angle between every two adjacent first welding point holes is 120 degrees; an included angle between the first welding point hole 11 and the second welding point hole 12 is beta, an included angle between the third welding point hole 13 and the fourth welding point hole 14 is beta, an included angle between the fifth welding point hole 15 and the sixth welding point hole 16 is beta, and the value range of the beta is as follows: beta is more than or equal to 50 degrees and less than or equal to 70 degrees.

As shown in fig. 15, the plurality of second solder hole includes a first solder hole 21, a second solder hole two 22, a second solder hole three 23, a second solder hole four 24, a second solder hole five 25, and a second solder hole six 26 that are arranged at intervals in the circumferential direction of the outer circumferential surface of the low pressure cylinder 2, where the first solder hole one 21, the second solder hole two 22, the second solder hole three 23, the second solder hole four 24, the second solder hole five 25, and the second solder hole six 26 are respectively located directly below the first solder hole one 11, the first solder hole two 12, the first solder hole three 13, the first solder hole four 14, the first solder hole five 15, and the first solder hole six 16.

Accordingly, as shown in fig. 16 and 17, the third solder hole includes a first solder hole 31, a second solder hole 32, a third solder hole 33, a fourth solder hole 34, a fifth solder hole 35, and a sixth solder hole 36, and the fourth solder hole includes a first solder hole 41, a second solder hole 42, a third solder hole 43, a fourth solder hole 44, a fifth solder hole 45, and a sixth solder hole 46, wherein the first solder hole 31, the second solder hole 32, the third solder hole 33, the fourth solder hole 34, the fifth solder hole 35, and the sixth solder hole 36 correspond to the first solder hole 11, the first solder hole 12, the third solder hole 13, the fourth solder hole 14, the fifth solder hole 15, and the sixth solder hole 16, the fourth solder hole 42, the fourth solder hole 43, and the fourth solder hole 43, respectively, Fourth solder hole four 44, fourth solder hole five 45, and fourth solder hole six 46 are provided corresponding to second solder hole one 21, second solder hole two 22, second solder hole three 23, second solder hole four 24, second solder hole five 25, and second solder hole six 26, respectively.

As shown in fig. 2 and 11, F1 and F2 are respectively the acting force of the gas received by the low pressure cylinder 2 and the high pressure cylinder 3, F3 and F4 are respectively the resistance force generated by the welding point group where the first welding point hole group 10 is located and the welding point group where the second welding point hole group 20 is located, and F3 and F4 are supporting points of each other to resist the acting force of the gas, so that the welding between the housing 100 and the low pressure cylinder 2 is more stable.

As shown in fig. 18, under the same load, when the load frequency is changed, the peak value of the amplitude-frequency response curve of the pump body assembly of the compressor adopting the double-layer welding spot in the invention along the radial direction is much smaller than that of the pump body assembly of the compressor adopting the single-layer welding spot in the prior art along the radial direction.

As shown in fig. 19, when operating under the same condition, the total noise level of the compressor using the single layer welding spot in the prior art is larger than that of the compressor using the double layer welding spot in the present invention within 1 kHz.

The compressor is a rolling rotor type two-stage compressor and comprises a liquid distributor, a shell, a motor and a pump body assembly.

The liquid distributor is provided with an inlet and an outlet, the liquid distributor is positioned outside the shell, the inlet is arranged on the shell and is used for communicating the inside and the outside of the shell to collect the returned refrigerant, and the outlet penetrates through the shell to be connected with the air suction port of the low-pressure cylinder 2 and is used for providing the returned refrigerant for the low-pressure cylinder 2.

The shell wraps the motor and the pump body assembly and is isolated from the external environment in an airtight mode.

The motor comprises a stator and a rotor, the stator is arranged into a hollow cylindrical structure and is fixedly connected to the upper portion in the shell in an interference mode, the rotor is rotatably arranged in a central hole of the stator and is fixedly connected with a crankshaft 1 of the pump body assembly to drive the crankshaft 1 to rotate, and therefore refrigerants entering a low-pressure cylinder 2 and a high-pressure cylinder 3 are compressed.

The pump body assembly and the motor are sleeved on the crankshaft 1, the pump body assembly is fixed inside the shell and located below the motor, and the pump body assembly is connected with the shell through welding spots formed by welding. The pump body assembly comprises a crankshaft 1, a first flange, a low-pressure cylinder 2, a partition plate, a high-pressure cylinder 3, a second flange, a first roller, a low-pressure cylinder sliding sheet, a second roller and a high-pressure cylinder sliding sheet. The crankshaft 1 includes a first shaft portion, a first eccentric portion, a second shaft portion, and an intermediate transition portion, which are sequentially disposed. Wherein, the low-pressure cylinder 2 is sleeved on the first eccentric part; the high-pressure cylinder 3 is sleeved on the second eccentric part; one end of the first shaft body part is arranged on the motor in a penetrating mode, the other end of the first shaft body part is connected with the first eccentric part, and the first flange is sleeved on the first shaft body part; one end of the second shaft part penetrates through the second flange, the other end of the second shaft part is connected with the second eccentric part, and the second flange is sleeved on the second shaft part; the middle transition part is respectively connected with the first eccentric part and the second eccentric part, and the partition plate is sleeved on the middle transition part.

The pump body assembly further comprises a first roller and a second roller, the first roller is clamped between the first eccentric portion and the low pressure cylinder 2, and the second roller is clamped between the second eccentric portion and the high pressure cylinder 3.

Wherein, all have the connecting hole on first flange, low pressure cylinder 2, baffle, high pressure cylinder 3 and the second flange, when the installation pump body, make the axis of each connecting hole all be located same straight line to constitute complete mounting hole, pass all connecting holes with the long bolt from the one end of mounting hole, wear out at the other end of mounting hole, and lock with the nut, so that the position between first flange, low pressure cylinder 2, baffle, high pressure cylinder 3 and the second flange is all relatively fixed. When the low pressure cylinder 2 is welded with the shell 100 of the compressor, the parts are fixed relative to the shell 100, and only the motor drives the crankshaft 1 to rotate in the central hole of each part, so as to achieve the purpose of compressing or discharging the refrigerant in each cylinder.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

through set up double-deck welding spot hole on low pressure cylinder 2, make the joint strength between shell 100 and the pump body subassembly improve by a wide margin, brought following two technological effects:

the compressor of the invention improves the natural frequency of the pump body component, and makes the noise reduction of the compressor easier. The lower the noise frequency of the compressor, the stronger the penetration capability thereof, and the pump body assembly, if resonated at a low frequency, may cause an increase in the peak value of the noise, which is not only difficult to reduce, but also easy to penetrate through the wall body, and passes from the outdoor to the indoor, resulting in a bad experience for the user. Therefore, the pump body assembly has a high natural frequency, and even if the resonance occurs, the noise peak value is increased, and the structure of the pump body assembly of the compressor is favorable for reducing the noise. The noise reduction measures that are commonly and effectively used in the industry in the prior art include the addition of silencers, resonant cavities, and the like, which are advantageous for reducing the noise in the middle and high frequency range, but are very difficult to reduce the noise peak in the lower frequency range.

The pump body assembly can swing due to the resistance moment applied to the pump body assembly when the pump body assembly compresses gas, the swing of the pump body assembly in the radial direction of the compressor is small, the vibration frequency is low, and the generated noise peak value is correspondingly low. As shown in fig. 19, it was verified by experiments that the total noise value of the compressor having the double layer welding point set according to the present invention is significantly reduced at a low frequency band (in the range of 0-1 kHz) compared to the compressor having the single layer welding point set.

In order to provide the technical scheme that the low-pressure cylinder 2 is arranged on the side, close to the motor, of the high-pressure cylinder 3, and the two welding point groups are arranged on the low-pressure cylinder 2, in the specific implementation process, only the gap between the outer peripheral surface of the low-pressure cylinder 2 and the inner wall surface of the shell 100 needs to be controlled, and the implementation difficulty is greatly reduced. Therefore, the problems that the noise is large and the reduction is difficult to achieve due to the fact that the pump body swings are solved, and the problems that the pump body assembly is blocked and the function of the pump body assembly is difficult to achieve due to the fact that the welding points are located on different parts are also solved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A compressor, comprising:

a housing (100);

a crankshaft (1), the crankshaft (1) being disposed within the housing (100);

the compressor comprises a low-pressure cylinder (2) and a high-pressure cylinder (3), wherein a crankshaft (1) penetrates through the low-pressure cylinder (2) and the high-pressure cylinder (3), and the low-pressure cylinder (2) is located on one side, close to a motor of the compressor, of the high-pressure cylinder (3);

wherein, low pressure jar (2) with be provided with a plurality of welding point groups between shell (100), a plurality of welding point groups are followed the axial interval of the outer peripheral face of low pressure jar (2) arranges, each welding point group all has a plurality of welding points, a plurality of welding points are followed the circumference interval arrangement of the outer peripheral face of low pressure jar (2), so that low pressure jar (2) with shell (100) welding.

2. The compressor of claim 1, wherein a plurality of low pressure cylinder weld spot hole groups (120) are provided on an outer peripheral surface of the low pressure cylinder (2), a plurality of shell weld spot hole groups (340) are provided on the shell (100), and the plurality of low pressure cylinder weld spot hole groups (120) and the plurality of shell weld spot hole groups (340) are provided in one-to-one correspondence, so that one weld spot group is formed between each low pressure cylinder weld spot hole group (120) and the corresponding shell weld spot hole group (340); each low pressure cylinder welding spot punch combination (120) all includes a plurality of low pressure cylinder welding spot holes, each shell welding spot punch combination (340) all includes a plurality of shell welding spot holes, each low pressure cylinder welding spot hole and corresponding form one between the shell welding spot hole the welding point.

3. The compressor of claim 2, wherein the low pressure cylinder weld spot hole set (120) and the shell weld spot hole set (340) are two, and the two low pressure cylinder weld spot hole sets (120) are a first weld spot hole set (10) and a second weld spot hole set (20), respectively, the first weld spot hole set (10) including a plurality of first weld spot holes, the second weld spot hole set (20) including a plurality of second weld spot holes.

4. The compressor according to claim 3, wherein when a height H of the low pressure cylinder (2) in an axial direction of the crankshaft (1) satisfies 20mm < H <25mm, the first weld hole in the first weld hole group (10) is three, and the second weld hole in the second weld hole group (20) is three.

5. The compressor according to claim 3, wherein each of the first and second weld holes has a diameter D1 and D2, and when a height H of the low pressure cylinder (2) in an axial direction of the crankshaft (1) satisfies 20mm < H <25mm, 4mm < D1 < 6mm, and D1 is D2.

6. The compressor according to claim 3, wherein the hole center line of each of the first welding point holes is located in a first plane, the hole center line of each of the second welding point holes is located in a second plane, the distance between the first plane and the end surface of the low pressure cylinder (2) on the side close to the motor is H1, the distance between the second plane and the end surface of the low pressure cylinder (2) on the side close to the high pressure cylinder (3) is H2, and when the height H of the low pressure cylinder (2) in the axial direction of the crankshaft (1) satisfies 20mm < H <25mm, 5mm < H1 < 10mm, and 5mm < H2 < 10 mm.

7. The compressor according to claim 3, wherein a plurality of the first welding point holes are arranged at intervals in a circumferential direction of the outer peripheral surface of the low pressure cylinder (2), a plurality of the second welding point holes are provided in one-to-one correspondence with the plurality of the first welding point holes, an included angle between a projection line of a hole center line of each of the first welding point holes and a projection line of a hole center line of the corresponding second welding point hole is α in the same projection plane perpendicular to the axis of the crankshaft (1), and when a height H of the low pressure cylinder (2) in the axial direction of the crankshaft (1) satisfies 20mm < H <25mm, 50 ° < α < 70 °.

8. The compressor according to claim 3, wherein when a height H of the low pressure cylinder (2) in an axial direction of the crankshaft (1) satisfies H ≧ 25mm, the first weld hole in the first weld hole group (10) is six, and the second weld hole in the second weld hole group (20) is six.

9. The compressor according to claim 3, wherein each of the first welding point holes has a diameter D1, each of the second welding point holes has a diameter D2, and when a height H of the low pressure cylinder (2) in an axial direction of the crankshaft (1) satisfies H ≥ 25mm, 6mm ≤ D1 ≤ 10mm, and D1 ≤ D2.

10. The compressor of claim 3, wherein the hole center line of each first welding point hole is located in a first plane, the hole center line of each second welding point hole is located in a second plane, the distance between the first plane and a first end surface of the low pressure cylinder (2) on the side away from the high pressure cylinder (3) is H1, the distance between the second plane and a second end surface of the low pressure cylinder (2) on the side close to the high pressure cylinder (3) is H2, and when the height H of the low pressure cylinder (2) in the axial direction of the crankshaft (1) is equal to or greater than 25mm, 6mm is equal to or less than H1 and equal to 12mm, and 6mm is equal to or less than H2 and equal to 12 mm.

11. The compressor of claim 3, wherein when the height H of the low pressure cylinder (2) along the axial direction of the crankshaft (1) is equal to or greater than 25mm, a plurality of first welding point holes are arranged at intervals along the circumferential direction of the outer circumferential surface of the low pressure cylinder (2), a plurality of second welding point holes and the plurality of first welding point holes are arranged in a one-to-one correspondence manner, and the projection line of the hole center line of each second welding point hole coincides with the projection line of the hole center line of the corresponding first welding point hole in the same projection plane perpendicular to the axial direction of the crankshaft (1).

12. The compressor according to claim 3, wherein when the height H of the low pressure cylinder (2) in the axial direction of the crankshaft (1) satisfies H ≥ 25mm, the plurality of first weld spot holes include first weld spot holes I (11), second weld spot holes II (12), third weld spot holes III (13), fourth weld spot holes (14), fifth weld spot holes (15) and sixth weld spot holes (16) arranged in sequence at intervals in the circumferential direction of the outer circumferential surface of the low pressure cylinder (2),

the first welding point hole I (11), the first welding point hole III (13) and the first welding point hole V (15) are uniformly distributed along the circumferential direction of the outer circumferential surface of the low-pressure cylinder (2);

the second welding point hole (12), the fourth welding point hole (14) and the sixth welding point hole (16) are uniformly distributed along the circumferential direction of the outer circumferential surface of the low-pressure cylinder (2);

an included angle between the first welding point hole I (11) and the first welding point hole II (12) is beta, and the value range of the beta is as follows: beta is more than or equal to 50 degrees and less than or equal to 70 degrees.