CN116163923A

CN116163923A - Compressor and refrigeration equipment

Info

Publication number: CN116163923A
Application number: CN202210155329.XA
Authority: CN
Inventors: 蔡顺; 邓敦勇; 殷田甜; 张洋洋; 黄刚
Original assignee: Anhui Meizhi Compressor Co Ltd
Current assignee: Anhui Meizhi Compressor Co Ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2023-05-26

Abstract

The invention discloses a compressor and refrigeration equipment, wherein the compressor comprises a shell, a cylinder, a second air suction outer pipe and a second air suction inner pipe, wherein a through hole is formed in the shell; the cylinder is arranged in the shell and comprises a cylinder body and a piston assembly, a first air suction hole is formed in the bottom of the cylinder body, a second air suction hole is formed in the side wall of the cylinder body, and the piston assembly comprises a piston arranged in the cylinder body; the second air suction outer tube is arranged outside the shell, and one end of the second air suction outer tube extends to the through hole; the second air suction inner pipe is arranged in the shell, one end of the second air suction inner pipe is communicated with the second air suction hole, and the other end of the second air suction inner pipe is communicated with the second air suction outer pipe; one end and/or the other end of the second air suction inner tube is/are fixed in a threaded connection mode. The invention aims to solve the problems of strong vibration and unstable connection of the air suction inner tube when the compressor runs, and simultaneously has the advantage of convenient disassembly and assembly.

Description

Compressor and refrigeration equipment

Technical Field

The invention relates to the technical field of compressors, in particular to a compressor and refrigeration equipment.

Background

The compressor is used as the most core component and the energy consumption large part of the refrigeration system, and has higher requirements on the refrigeration performance and the energy efficiency level. The household refrigerator is generally provided with a freezing chamber and a refrigerating chamber, and in the cooling process of the freezing chamber and the refrigerating chamber, the evaporating temperatures of the corresponding refrigerants are different, and the pressures of the corresponding refrigerants are also different.

The existing compressor realizes the refrigeration function of freezing and refrigerating through a pipeline in a serial connection mode, so that the COP (energy efficiency ratio) of the refrigerator is lower, the novel single-cylinder double-independent air suction pump body structure has the capability of greatly improving the overall performance of the reciprocating compressor on the basis of being different from a traditional single-air suction single-air discharge compression pump body mechanism, and in order to improve the COP of the energy efficiency of the compressor when the compressor works, the second air suction hole is correspondingly additionally arranged, but the reciprocating motion vibration of a piston of the compressor cylinder is large in the working process, an air suction inner pipe which is required to be connected to the second air suction hole is affected by vibration, and the joint of the air suction inner pipe and the cylinder is unstable.

Disclosure of Invention

The invention mainly aims to provide a compressor and refrigeration equipment, and aims to solve the problems that the compressor is strong in vibration and the connection of an air suction inner tube is unstable when in operation.

To achieve the above object, the present invention provides a compressor comprising:

a housing having a via hole formed thereon;

the cylinder is arranged in the shell and comprises a cylinder body and a piston assembly, a first air suction hole is formed in the bottom of the cylinder body, a second air suction hole is formed in the side wall of the cylinder body, and the piston assembly comprises a piston arranged in the cylinder body;

the second air suction outer tube is arranged outside the shell, and one end of the second air suction outer tube extends to the through hole; the method comprises the steps of,

the second air suction inner pipe is arranged in the shell and provided with a first end and a second end which are opposite, the first end is communicated with the second air suction hole, and the second end is communicated with the second air suction outer pipe;

the first end and/or the second end of the second air suction inner tube are/is fixed in a threaded connection mode.

Optionally, the first end of the second air suction inner tube is connected with the second air suction hole through a threaded connection structure.

Optionally, the first end of the second air suction inner tube is sleeved with a sleeve, the sleeve is provided with external threads, the second air suction hole is provided with internal threads, and the sleeve is in threaded connection with the second air suction hole.

Optionally, the second air suction hole includes a first hole section and a second hole section sequentially arranged from the outer side of the cylinder toward the inner side thereof, and the cross-sectional area of the first hole section is smaller than that of the second hole Duan Da, so that an outward step part is formed at the junction of the first hole section and the second hole section;

The sleeve is in threaded connection with the first hole section, and the first end of the second air suction inner tube penetrates out of the sleeve to be arranged in a manner of abutting against the step part.

Optionally, the first end of the second inner tube of breathing in is the setting of buckling to be formed with the end of bending, the tip of bending the end is formed with the first annular convex part of valgus, the sleeve pipe cover is established the end of bending and by the spacing of first annular convex part, first annular convex part with the step portion butt joint.

Optionally, the port at the first end of the second suction inner tube is provided in a flare shape to form the first annular protrusion.

Optionally, a first sealing ring is disposed between the first annular protruding portion and the step portion.

Optionally, the second end of the second air suction inner tube is connected with the second air suction outer tube through a thread structure.

Optionally, a threaded joint is arranged at the second end of the second air suction inner tube;

the second air suction outer tube is in threaded connection with the threaded joint.

Optionally, the threaded joint comprises:

the first screw joint piece is provided with external threads at one end, sleeved in the second end of the second air suction inner pipe and connected with the second end of the second air suction inner pipe in a threaded manner, and a second annular protruding part which is turned outwards is formed at the end part of the other end; the method comprises the steps of,

And one end of the second threaded connecting piece is sleeved at the other end of the first threaded connecting piece and limited by the second annular convex part, and the other end of the second threaded connecting piece is provided with internal threads and sleeved at one end of the second air suction outer tube and is in threaded connection with the second air suction outer tube.

Optionally, the port at the other end of the first screw connector is provided in a flare shape to form the second annular protrusion.

Optionally, a second sealing ring is arranged between the second screw connection piece and the second air suction inner pipe.

Optionally, the piston has a first dead point at the bottom of the cylinder and a second dead point far from the bottom of the cylinder in the movable stroke;

the distance between the second air suction hole and the first dead point is L, and the distance between the first dead point and the second dead point is S, wherein 0.5S is less than L.

The present invention also provides a refrigeration apparatus including the compressor, the compressor including:

a housing having a via hole formed thereon;

the second air suction inner pipe is arranged in the shell and provided with a first end and a second end which are opposite to each other, the first end of the second air suction inner pipe is communicated with the second air suction hole, and the second end of the second air suction inner pipe is communicated with the second air suction outer pipe;

In the technical scheme of the invention, the second air suction holes are arranged on the side wall of the cylinder body, and a complete pipeline from the outside of the shell to the inside of the cylinder body is formed through the second air suction inner pipes and the second air suction outer pipes which are connected one by one. At least one end of the second air suction inner pipe is fixedly connected in a threaded connection mode, the reliability and the stability of threaded connection are utilized, the influence of vibration generated during operation of the compressor and larger air flow pressure in the pipe on the connection between the second air suction inner pipe and the second air suction outer pipe and/or between the second air suction inner pipe and the cylinder body is avoided, the stability of a pipeline is guaranteed, the running stability of the whole system is guaranteed, and the service life of the pipeline and even the service life of the system are prolonged. Meanwhile, the threaded connection is adopted, so that the disassembly and assembly are convenient, and the production operation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an internal structure of a compressor according to the present invention;

FIG. 2 is a schematic cross-sectional view of the second suction inner tube and cylinder connection structure of FIG. 1;

FIG. 3 is an exploded view of the connection structure of the second suction inner tube and the second suction outer tube in FIG. 1;

fig. 4 is a schematic cross-sectional view of the threaded joint of fig. 1.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Compressor	41	First end
1	Shell body	411	Bending end
				11	Via hole	411a	A first annular convex part
2	Cylinder	42	Second end
				21	Cylinder body	43	Casing pipe
211	A second air suction hole	5	Threaded joint
				211a	A first hole section	51	First screw-connection piece
211b	A second hole section	511	Second annular convex part
				212	Step part	52	Second screw joint
22	Piston assembly	6	First sealing ring
				3	Second air suction outer tube	7	Second sealing ring
4	Second air suction inner tube

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

In view of this, the present invention provides a compressor, and fig. 1 to 4 are views illustrating an embodiment of the compressor according to the present invention, and the compressor will be described with reference to the accompanying drawings.

Referring to fig. 1 to 4, the compressor 100 includes a housing 1, a cylinder 2, a second suction outer tube 3, and a second suction inner tube 4, wherein a through hole 11 is provided on the housing 1; the cylinder 2 is arranged in the shell 1, the cylinder 2 comprises a cylinder body 21 and a piston assembly 22, a first air suction hole is formed in the bottom of the cylinder body 21, a second air suction hole 211 is formed in the side wall of the cylinder body, and the piston assembly 22 comprises a piston arranged in the cylinder body 21; the second air suction outer tube 3 is arranged outside the shell 1, and one end of the second air suction outer tube extends to the through hole 11; the second air suction inner pipe 4 is arranged in the shell 1 and is provided with a first end 41 and a second end 42 which are opposite, the first end 41 is communicated with the second air suction hole 211, and the second end 42 is communicated with the second air suction outer pipe 3; wherein the first end 41 and/or the second end 42 of the second suction inner tube 4 are/is fixed by screw connection.

In the solution of the present invention, the second air suction hole 211 is provided on the side wall of the cylinder 21, and a complete pipeline from the outside of the housing 1 to the inside of the cylinder 21 is formed by the second air suction inner pipe 4 and the second air suction outer pipe 3 connected one by one. At least one end of the second air suction inner pipe 4 is fixedly connected in a threaded connection mode, vibration generated during operation of the compressor 100 and larger air flow pressure in the pipe are prevented from affecting connection between the second air suction inner pipe 4 and the second air suction outer pipe 3 and/or the cylinder 21 by utilizing reliability and stability of threaded connection, stability of the pipeline is guaranteed, operation stability of the whole system is guaranteed, and service life of the pipeline and even the system is prolonged. Meanwhile, the threaded connection is adopted, so that the disassembly and assembly are convenient, and the production operation is convenient.

It should be noted that, when the first end 41 or the second end 42 of the second air intake inner tube 4 is connected and fixed by a threaded connection, the other end of the second air intake inner tube 4 may be also connected and fixed by a threaded connection, or may be fixed by other connection methods, for example, integrally formed, clamped, etc., so that the communication of the whole pipeline can be achieved, which is not limited herein. In this embodiment, the first end 41 and the second end 42 of the second suction inner tube 4 are connected and fixed by adopting a threaded connection manner, so that on one hand, the threaded connection stability is strong, and on the other hand, both ends are fixed by adopting a threaded connection manner, so that the connection and fixation stability of the second suction inner tube 4 can be maximized; on the other hand, in the connection and fixation mode of the integrated molding, on the basis of integrating the second air suction outer tube 3 with the housing 1 and separately processing the cylinder 21, the second air suction inner tube 4 is separately processed, and then the second air suction outer tube 3 and the cylinder 21 are connected through the second air suction inner tube 4, so that the problems of complex manufacturing process and difficult storage when the second air suction inner tube 4 and the second air suction outer tube 3 are integrated or the second air suction inner tube 4 and the cylinder 21 are integrated are avoided, thereby facilitating the production, the storage and the transportation of parts and the transportation on a production line; on the other hand, for other connection fixing modes such as joint, threaded connection technology is mature, and processing is convenient with low costs.

Specifically, when the first end 41 of the second suction inner tube 4 is connected to the second suction hole 211 through a threaded connection structure, the first end 41 of the second suction inner tube 4 is sleeved with a sleeve 43, the sleeve 43 is provided with external threads, the second suction hole 211 is provided with internal threads, and the sleeve 43 is in threaded connection with the second suction hole 211. It should be noted that, a screw structure may be directly disposed on the second air intake inner tube 4, and the second air intake inner tube 4 and the second air intake hole 211, that is, the cylinder 21 may be directly screwed and fixed, but when the second air intake inner tube 4 is installed in this manner, the second air intake inner tube 4 needs to be rotated relative to the cylinder 21, so that in a smaller space of the housing 1, the installation operation is inconvenient, in this embodiment, the first end 41 of the second air intake inner tube 4 is sleeved with the sleeve 43, and the connection between the second air intake inner tube 4 and the cylinder 21 may be realized by screwing the sleeve 43 with the cylinder 21, and when the sleeve 43 is rotated during installation, so that the rotation of the second air intake inner tube 4 relative to the cylinder 21 is avoided, thereby facilitating the positioning operation of the second air intake inner tube 4 during installation.

It should be noted that, the cylinder 21 may also have a connecting section extending from the second suction hole 211, an external thread is provided on the connecting section, an internal thread is provided on the sleeve 43 correspondingly, and the sleeve 43 is screwed with the connecting section extending from the cylinder 21 so as to connect the second suction inner tube 4 with the cylinder 21, but this arrangement, the process of machining the extending connecting section on the cylinder 21 is complicated and not suitable for manufacturing, in this embodiment, the sleeve 43 is provided with an external thread, the second suction hole 211 on the cylinder 21 is provided with an internal thread, and the sleeve 43 may be screwed with the second suction hole 211 on the cylinder 21 so as to connect the second suction inner tube 4 with the cylinder 21, which has a simple structure and low cost.

Further, the second suction hole 211 includes a first hole section 211a and a second hole section 211b which are sequentially provided from the outside of the cylinder 21 toward the inside thereof, and the cross-sectional area of the first hole section 211a is larger than that of the second hole section 211b, so that an outward stepped portion 212 is formed at the junction of the first hole section 211a and the second hole section 211 b; the sleeve 43 is screwed with the first hole section 211a, and the first end 41 of the second suction inner tube 4 is arranged to pass through the sleeve 43 to abut against the step 212. The second air suction inner tube 4 and the cylinder 21 need not only to be connected but also to be fixed, the sleeve 43 is in threaded connection with the second air suction hole 211 to drive the second air suction inner tube 4 to be close to the cylinder 21, at this time, the second air suction inner tube 4 contacts with the cylinder 21 and the second air suction inner tube 4 and the cylinder 21 can be abutted and fixed by further screwing the sleeve 43. The rotatable radial protruding part can be arranged on the second air suction inner pipe 4 and is fixedly connected with the sleeve, the radial protruding part and the second air suction inner pipe 4 are in sealing arrangement, when the sleeve 43 is connected with the second air suction inner hole, the sleeve 43 is driven to be in threaded connection with the second air suction inner hole by rotating the radial protruding part, the radial protruding part is abutted with the outer wall of the cylinder 21, the radial protruding part is screwed down to be abutted with the outer wall of the cylinder 21, the connection and fixation of the second air suction inner pipe 4 and the cylinder 21 can be realized by the arrangement, but the rotatable and sealed radial protruding part is arranged on the second air suction inner pipe 4, the cost is high, and the method is not suitable for industrial production, so in the embodiment, the sleeve 43 is adopted to be in threaded connection with the first hole section 211a to drive the end part of the second air suction inner pipe 4 to be close to the step 212 at the second hole section 211b, the second air suction inner pipe 4 is abutted with the step 212 to be tightly fixed, the connection of the second air suction inner pipe 4 and the second air suction inner pipe 21 is convenient to be connected with the second air suction inner pipe 21, and the cost is guaranteed to be lower than the second air suction inner pipe 4.

In addition, the first end 41 of the second suction inner tube 4 is bent to form a bent end 411, an everted first annular protrusion 411a is formed at an end of the bent end 411, the sleeve 43 is sleeved on the bent end 411 and limited by the first annular protrusion 411a, and the first annular protrusion 411a is abutted to the step 212. For being convenient for spatial arrangement in casing 1, will the first end 41 of the inner tube 4 of breathing in of second is buckled and is set up, sets up its tip simultaneously as the first annular convex 411a of valgus, makes sleeve pipe 43 cover is located when the inner tube 4 of breathing in of second, both ends are spacing, avoid sleeve pipe 43 movable range is too big and avoid sleeve pipe 43 drops, keeps sleeve pipe 43 is located the position uniformity on the inner tube 4 of breathing in of second to use during the production assembly. Meanwhile, the sleeve 43 may abut against the first annular protrusion 411a, when the sleeve 43 is connected to the cylinder 21, the sleeve 43 may abut against the first annular protrusion 411a to drive the second suction inner tube 4 to move, and when the first annular protrusion 411a abuts against the step 212, the sleeve 43 may be continuously screwed, so that the first annular protrusion 411a is clamped between the step 212 and the sleeve 43, and the connection is stable. Of course, the first end 41 of the second suction inner tube 4 may be provided with a radial protrusion connected to the sleeve 43 to limit the movement of the sleeve 43, and the radial protrusion may also drive the second suction inner tube 4 to move to abut against the step 212 when the sleeve 43 is screwed to the cylinder 21, but obviously, the method of machining the first annular protrusion 411a is simpler and less costly, and is more suitable for industrial production.

Specifically, the port of the first end 41 of the second suction inner tube 4 is provided in a flare shape to form the first annular protrusion 411a. The first annular protrusion 411a is provided with a bell mouth, so that the radial cross-section of the first annular protrusion 411a is gradually changed, in the process of abutting and tightening the sleeve 43 and the first annular protrusion 411a, the outer side of the sleeve 43 abuts against the first hole section 211a, the inner side of the sleeve 43 abuts against the first annular protrusion 411a, and a force is applied to the first annular protrusion 411a towards the axis of the sleeve, so that the sleeve 43 can limit the radial position of the first annular protrusion 411a, the axial line of the second suction inner tube 4 and the axial line of the second hole section 211b are ensured to coincide, the axial line deviation of the second suction inner tube and the second hole section 211b is avoided, and vibration is generated in the operation process of the compressor 100, and the stability of the compressor 100 is affected. Of course, the first annular protrusion 411a may be directly provided as a radially protruding boss, but the directly provided radially protruding boss cannot function to radially limit the position of the first annular protrusion 411a as described above, and may affect the operation stability of the compressor 100.

Further, a first seal ring 6 is provided between the first annular protruding portion 411a and the step portion 212. In order to ensure the tightness of the connection between the second suction inner pipe 4 and the cylinder 21, a sealing structure is required to be arranged between the second suction inner pipe 4 and the second suction hole 211, and the sealing structure may be an annular sealing pad arranged at the outlet of the second suction hole 211, so that the installation is convenient but the connection is easy to fall off, or sealing members may be arranged between the sleeve 43 and the second suction hole 211 and between the sleeve and the second suction inner pipe 4, but the structure is complex and the cost is high. In this embodiment, the first sealing ring 6 is disposed between the first annular protrusion 411a and the step 212, so that the sealing effect is good and the installation is convenient, the first sealing ring 6 may be directly disposed between the first annular protrusion 411a and the step 212, and the first annular protrusion 411a and the step 212 are spaced apart, but this arrangement easily results in unstable fixation of the second suction inner tube 4 and the cylinder 21, and the first sealing ring 6 may be subject to extrusion offset, so that a gap appears between the first annular protrusion 411a and the step 212 to affect the tightness, so that an annular groove may be concavely formed in the inner wall of the first annular protrusion 411a, and the first sealing ring 6 may be disposed in the annular groove, so that on one hand, the first sealing ring 6 is embedded in the first annular protrusion 411a, so as to facilitate the installation; on the other hand, the first sealing ring 6 is limited, so that the influence of the deviation of the first sealing ring on the sealing performance is avoided; on the other hand, after the first sealing ring 6 is compressed, the first annular protrusion 411a may abut against the step 212, so as to ensure the stability of the connection and fixation between the second suction inner tube 4 and the cylinder 21.

On the other hand, when the second end 42 of the second suction inner tube 4 is connected to the second suction outer tube 3 by a screw structure. The second end 42 of the second suction inner tube 4 is provided with a threaded joint 5; the second suction outer tube 3 is screwed with the screwed joint 5. The aperture of the second suction inner pipe 4 and the aperture of the second suction outer pipe 3 are required to be kept consistent so as to ensure the operation power of the compressor 100. At this time, when the second air suction inner pipe 4 and the second air suction outer pipe 3 are in threaded connection, if one side of the second air suction inner pipe is directly provided with external threads, the other side of the second air suction inner pipe is provided with internal threads for threaded connection, and the pipe wall is thinner, so that the production and the processing are difficult, and the strength of the joint is lower and cannot meet the required strength standard. Therefore, the threaded joint 5 needs to be added to connect the second air suction inner tube 4 and the second air suction outer tube 3, and the threaded joint 5 may be disposed in the second air suction inner tube 4 or may be disposed in the second air suction outer tube 3, in this embodiment, the threaded joint 5 is disposed at the second end 42 of the second air suction inner tube 4, because the second air suction outer tube 3 needs to be integrally disposed with the housing 1, the threaded joint 5 is disposed in the second air suction inner tube 4, and then the second air suction inner tube 4 is disposed in the housing 1 and connected with the second air suction outer tube 3, because the housing 1 has a small space, compared with the case that the threaded joint 5 is disposed on the second air suction outer tube 3 in the housing 1, and then the second air suction outer tube 3 and the second air suction inner tube 4 are fixedly connected in the housing 1, so as to facilitate the installation operation in the production process.

Further, the threaded joint 5 includes a first threaded member 51 and a second threaded member 52, one end of the first threaded member 51 is provided with an external thread, and is sleeved in the second end 42 of the second air suction inner tube 4, and is in threaded connection with the second end 42 of the second air suction inner tube 4, and the end of the other end is formed with an everted second annular protrusion 511; one end of the second screw member 52 is sleeved at the other end of the first screw member 51 and limited by the second annular protrusion 511, and the other end is provided with an internal thread and sleeved at one end of the second air suction outer tube 3 and is in threaded connection with the second air suction outer tube 3. The connection mode of the threaded joint 5 and the second air suction inner pipe 4 may be an integral molding, a threaded connection or other connection modes, in this embodiment, the threaded joint 5 is in threaded connection with the second air suction inner pipe 4, and compared with the integral molding, the threaded connection has a simple processing mode and low cost, and the threaded joint 5 can be independently produced and processed, so that the quality control of the threaded joint 5 is facilitated; compared with other connection modes, the threaded connection is more stable and reliable, so that the service life of the threaded joint 5 is longer, and the cost of the compressor 100 is indirectly reduced.

Specifically, the screw joint 5 includes the first screw 51 screwed with the second suction inner pipe 4 and the second screw 52 screwed with the second suction outer pipe 3. The first screw-connection piece 51 and the second screw-connection piece 52 may be formed and fixed integrally, but in this way, when the second air-intake outer tube 3 and the second air-intake inner tube 4 are connected, synchronous operation is required, the threaded joint 5 cannot be preassembled on the second air-intake inner tube 4 outside the housing 1, so that the operation is complicated when the second air-intake inner tube 4 and the second air-intake outer tube 3 are connected, in this embodiment, the first screw-connection piece 51 and the second screw-connection piece 52 are movably arranged relatively, that is, the other end of the first screw-connection piece 51 is formed with an everted second annular protrusion 511; one end of the second screw-connection piece 52 is sleeved at the other end of the first screw-connection piece 51 and limited by the second annular protrusion 511, so that when the first screw-connection piece 51 is connected with the second air suction inner tube 4 to pre-install the threaded joint 5 on the second air suction inner tube 4, the second screw-connection piece 52 can rotate relative to the first screw-connection piece 51 to be connected with the second air suction outer tube 3, the number of process steps on a production line is reduced, and the process arrangement on the production line and the mounting operation of staff are facilitated. And, when the screwed joint 5 is preassembled to the second air suction inner tube 4, the second screw member 52 is sleeved at one end of the first screw member 51 and limited by the second air suction inner tube 4 and the second annular protrusion 511, so that the second screw member 52 is prevented from falling off after preassembling. When the second screw member 52 is connected to the second air intake outer tube 3, the second screw member 52 abuts against the second annular protrusion 511, and then the second annular protrusion 511 abuts against the second air intake outer tube 3, so that the second air intake outer tube 3 is fixedly connected to the first screw member 51, and the second air intake outer tube 3 and the second air intake inner tube 4 are fixedly connected and communicated.

Of course, the other end of the first screw member 51 may be further away from the end thereof to provide a radial protrusion to limit the movement of the second screw member 52, and when the second screw member 52 is connected with the second air suction outer tube 3, the second screw member 52 drives the first screw member 51 to approach the second air suction outer tube 3 through the radial protrusion, so that the end of the other end of the first screw member 51 abuts against the second air suction outer tube 3, but obviously, the manner of machining the second annular protrusion 511 at the end of the other end of the first screw member 51 may reduce the length of the second screw member 52 in the axial direction thereof, thereby reducing the size of the second screw member 52, thereby reducing the cost and being more suitable for small-space installation operation in the housing 1.

Further, the other end of the first screw member 51 is flared to form the second annular protrusion 511. Similar to the first annular protrusion 411a described above, the second annular protrusion 511 is configured as a flare, so that the radial cross-sectional area of the second annular protrusion 511 is gradually changed, and in the process that the second screw member 52 abuts against and abuts against the second annular protrusion 511, a force is applied to the second annular protrusion 511 towards the axis thereof, so that the second screw member 52 can limit the radial position of the second annular protrusion 511, so as to ensure that the axis of the second air suction outer tube 3 coincides with the axis of the first screw member 51, avoiding the axial offset of the two, and generating vibration during the operation of the compressor 100, thereby affecting the stability of the compressor 100. Of course, the second annular protrusion 511 may be directly provided as a radially protruding boss, but the directly provided radially protruding boss cannot function to radially limit the position of the second annular protrusion 511 as described above, possibly affecting the operation stability of the compressor 100.

In addition, a second sealing ring 7 is arranged between the second screw-connection piece 52 and the second suction inner tube 4. In order to ensure the tightness of the connection between the second suction inner tube 4 and the second suction outer tube 3, it is necessary to provide a sealing structure at the screwed joint 5, and the sealing structure may be respectively provided between the first screw member 51 and the second suction inner tube 4 and between the first screw member 51 and the second suction outer tube 3, so that the sealing effect is good, but the parts are required to be more; similarly, the sealing members may be disposed between the first screw member 51 and the second suction inner tube 4 and between the second screw member 52 and the second annular protrusion 511, respectively, so that a good sealing effect is ensured, but the parts are required as much, which increases the cost of the product and is inconvenient for installation during the production process. In this embodiment, the second sealing ring 7 is disposed between the second screw connection piece 52 and the second air suction inner tube 4, after the threaded joint 5 is connected and fixed with the second air suction outer tube 3 and the second air suction inner tube 4, the second sealing ring 7 is located at a connection gap between the first screw connection piece 51 and the second air suction inner tube 4, and the second sealing ring 7 is also located at a connection gap between the second screw connection piece 52 and the first screw connection piece 51, after the second sealing ring 7 is compressed, the two connection gaps can be synchronously sealed, so that the sealing effect at the threaded joint 5 is achieved.

It can be understood that, taking the refrigerating system of the compressor 100 for a refrigerator as an example for explanation, during the refrigerating process of the refrigerator, high-temperature and high-pressure refrigerant gas is conveyed from the compressor 100 to the evaporators of the corresponding freezing chamber and the refrigerating chamber to evaporate and absorb heat, so as to realize the refrigeration of the freezing chamber and the refrigerating chamber, but the temperatures set in the freezing chamber and the refrigerating chamber are inconsistent, the evaporating temperatures of the freezing chamber and the refrigerating chamber are different, the temperature and the pressure of the refrigerant after the heat exchange of the freezing chamber and the refrigerating chamber are different, and in the prior art, the compressor 100 realizes the refrigerating function of freezing and refrigerating through one flow path, so that the whole heat exchange system needs to participate in the working process no matter whether the freezing chamber or the refrigerating chamber needs to be refrigerated, so that the energy consumption is larger and the energy efficiency is lower.

Specifically, the first air suction hole is used for communicating with a first condensation flow path, the second air suction hole 211 is communicated with a second condensation flow path, a working cavity is formed between the piston and the bottom of the cylinder 21, and the piston has a first dead point near the bottom of the working cavity and a second dead point far away from the bottom of the working cavity in a moving stroke. By arranging two parallel flow paths, namely a freezing condensation flow path and a refrigerating condensation flow path, namely the high-temperature and high-pressure refrigerant formed by compression of the compressor 100 can be reasonably distributed to the freezing flow path and the refrigerating flow path, the high-temperature and high-pressure refrigerant formed by compression of the compressor 100 returns to the lower temperature and the lower pressure of the compressor after passing through the corresponding evaporator of the freezing chamber, and the high-temperature and high-pressure refrigerant formed by compression of the compressor 100 returns to the higher temperature and the higher pressure of the compressor 100 after passing through the corresponding evaporator of the refrigerating chamber. The working chambers of the cylinder 21 are simultaneously communicated with the first air suction hole and the second air suction hole 211, so that the air suction amount of the working chamber of the cylinder 21 can be improved by the first air suction flow passage corresponding to the first air suction hole, the compression energy efficiency of the compressor 100 is improved by conveying the refrigerant with relatively low temperature and relatively low pressure flowing back from the freezing chamber into the cylinder 21 of the compressor 100 through the first air suction hole, and the refrigerant with relatively high temperature and relatively high pressure flowing back from the refrigerating chamber is conveyed into the compressor 100 through the second air suction hole 211, and thus, when the cylinder 21 compresses the refrigerant gas conveyed by the first air suction hole, the second air suction hole 211 can supplement air in the working chamber, thereby improving the air suction amount of the working chamber of the cylinder 21, further improving the compression energy efficiency of the compressor 100, and realizing respective working conditions and reducing power consumption through two parallel flow paths.

In the conventional compressor 100, it is often necessary to control the opening and closing of each suction hole by means of a control valve group, and when the compressor 100 has only one suction hole, one control valve group is provided; when the compressor 100 has a plurality of suction holes, a plurality of control valve sets are generally correspondingly arranged, which is complicated to control. Thus, in an embodiment of the present invention, the distance between the second suction hole 211 and the first dead point is set to be L, and the distance between the first dead point and the second dead point is set to be S, wherein 0.5S < L is set. During the movement of the piston, the opening and closing states of the first air suction hole and the second air suction hole 211 are as follows:

the intake stroke of the cylinder 2 includes:

first pass: the piston moves from the first dead point to the second dead point, and the distance from the first dead point is smaller than 0.5S. In the first stroke, the control valve group is opened, so that the first air suction hole is conducted, and the second air suction hole 211 is shielded by the piston. At this time, the working chamber of the cylinder 21 is sucked only through the first suction hole. At this time, the total amount of the refrigerant in the working cavity is from the first suction hole, namely the refrigerant of the first condensation loop. It will be appreciated that, as the piston moves towards the position close to the second dead point, the compression space of the working chamber of the cylinder increases, and the piston is in a negative pressure state, so that the external air flow is facilitated to enter the working chamber of the cylinder 21 from the first air suction hole. And since the air flow pressure through the first suction hole is smaller than the air flow pressure through the second suction hole 211. Therefore, in this moving stroke, the second suction hole 211 is blocked by the piston, so as to avoid that the air flow of the second suction hole 211 blocks the air flow of the first suction hole from entering the working chamber of the cylinder 21.

A second stroke: the piston moves from the first dead point to the second dead point, and the distance from the first dead point is larger than 0.5S. In the second stroke, the piston does not block the second suction hole 211, so that the second suction hole 211 communicates with the working chamber of the cylinder 21. At this time, the control valve group is switched between an open state and a closed state according to actual requirements. When the control valve group is in an open state, the first suction hole and the second suction hole 211 simultaneously input air flow to the working chamber of the cylinder 21. Since a certain amount of air flow is sucked into the space of the working chamber of the cylinder 21 through the first suction hole in the first stroke, a certain air flow pressure is provided in the compression space. Therefore, when the air flow is inputted into the working chamber of the cylinder via the second suction hole 211, the air flow of the first suction hole is less affected. And because the distance from the second air suction hole 211 to the first dead point is greater than 0.5S, that is, the distance from the second air suction hole to the first air suction hole is greater than 0.5S, a proper buffer distance exists between the second air suction hole and the first air suction hole, the influence of the air flow of the second air suction hole 211 on the air flow of the first air suction hole is reduced, and the compression energy efficiency is improved. When the control valve group is in a closed state, the second air suction hole 211 inputs air flow to the working chamber of the cylinder. At this time, the refrigerant supplied into the working chamber comes from the second suction hole 211, i.e., the refrigerant of the second condensation circuit flows back into the working chamber of the cylinder 21. It can be understood that the closer the second suction hole 211 is to the midpoint between the first dead point and the second dead point, the earlier the second suction hole 211 is opened and the later the second suction hole is closed, the longer the high-pressure refrigerant is provided by the second condensation circuit, and the larger the air supplement amount is; when the second suction hole 211 is closer to the second dead point, the second suction hole 211 is opened later and closed earlier, and the high-pressure refrigerant provided by the second condensation circuit is short in time and short in air supplementing time, so that the air supplementing amount is also smaller. In reality, the position of the second air suction hole can be set according to the requirement of the air supplementing amount.

The compression stroke of the cylinder 2 includes:

third stroke: the piston moves from the second dead point to a direction close to the first dead point, and is more than 0.5S away from the first dead point. In the third stroke, the control valve group is closed, and the piston moves rapidly towards the direction close to the first dead point. At this time, the second suction hole 211 still inputs the air flow to the working chamber of the cylinder 21. At this time, the refrigerant supplied into the working chamber comes from the second suction hole 211. Therefore, in the third stroke, when the air flow in the working chamber of the cylinder 21 is compressed, the air flow inputted into the working chamber of the cylinder 21 via the second suction hole 211 is not excessively blocked yet, so that the cylinder 21 can still suck the air flow in the compression stroke. Further, since the air flows from the first air suction hole and the second air suction hole 211 are mixed in the working chamber of the cylinder 21, the air flow pressure in the working chamber of the cylinder 21 is smaller than the air flow pressure in the second air suction hole 211.

Fourth stroke: the piston moves from the second dead point to a direction close to the first dead point, and the distance from the second dead point is smaller than 0.5S. In the fourth stroke, the control valve group is still closed, and the piston shields the second suction hole 211. In the process, the piston compresses the air flow in the working chamber of the cylinder 21 into a high-pressure air flow. And when the piston moves to the second dead point, the pressure of the air flow in the working chamber of the cylinder 21 is compressed in place. At this time, the control valve group of the output pipe communicating with the working chamber of the cylinder 21 is switched from the closed state to the open state to output the compressed high-pressure air flow.

The working lines corresponding to the two condensation flow paths are as follows:

the flow path of the air flow in the first air suction flow path is as follows: the first condensation flow path→the first suction hole→the working chamber of the cylinder 21.

The airflow flow path in the second air suction flow passage is as follows: the second condensation flow path→the second suction hole 211→the working chamber of the cylinder 21.

And the compressor 100 further includes an inner discharge pipe communicating with the working chamber of the cylinder 21, the inner discharge pipe being adapted to communicate with an outer discharge pipe so as to discharge the compressed high-pressure air flow in the working chamber of the cylinder 21 from the inner discharge pipe to the outer discharge pipe.

In a specific implementation, the first condensation flow path corresponds to a freezing chamber of a refrigerator, because the refrigerating capacity required by the freezing chamber is larger, the required refrigerant capacity is more, in the working engineering, the pressure of the consumed refrigerant is also more, the second condensation flow path corresponds to a refrigerating chamber of the refrigerator, because the refrigerating capacity required by the refrigerating chamber is smaller, the pressure of the consumed refrigerant is also less, thus the pressure in the first suction hole is far smaller than the pressure of the second suction hole, but the refrigerant capacity of the first condensation flow path is larger, in this way, when the compressor 100 works, the first suction hole is mainly opened for main suction in the suction stroke of the first half section of suction, the larger refrigerant capacity on the condensation flow path corresponding to the freezing chamber can be sucked, in the suction stroke of the second half section of suction, the second suction hole 211 is communicated with the working cavity, the first suction hole 211 is closed, the second suction hole 211 starts to be filled with high-pressure refrigerant gas, in the last half section of suction stroke in the compression stage is far smaller than the second suction hole, and the second suction hole 211 is continuously opened, and the second suction hole 211 is opened, and the second suction hole is closed, in this stage is continuously, and the second suction hole is opened, and the distance is adjusted, in this stage, and the second suction hole is opened. And the second air suction hole 211 is arranged on the side wall of the cylinder body 21 and is close to the second dead point, so that the compressor 100 does not need to specially arrange a control valve group to control the opening and closing of the second air suction hole 211, but can realize the automatic opening and closing of the second air suction hole 211 in the movable stroke of the piston, and the structure design is ingenious and the cost is saved.

The distance between the first dead point and the second dead point is S. That is, the first dead center is a position where the end face of the piston near the end of the bottom of the working chamber is located when the end face of the piston near the end of the bottom wall of the cylinder 21 moves to the nearest distance near the bottom wall of the cylinder 21. The second dead center is a position where the end face of the piston near the bottom wall of the cylinder 21 is located when the end face of the end of the piston near the bottom wall of the cylinder 21 moves to the farthest distance away from the bottom of the working chamber. I.e. the distance S is the distance between the two extreme conditions of the end face of the piston close to the end of the bottom wall of the cylinder 21. The distance between the second air suction hole 211 and the first dead point is L, that is, the distance between the center line of the second air suction hole 211 and the first dead point is L.

In addition, in order to achieve the above object, the present invention also proposes a refrigeration apparatus including the compressor 100 according to the above technical solution. It should be noted that, the detailed structure of the compressor 100 of the refrigeration device may refer to the embodiment of the compressor 100 described above, and will not be described herein again; because the compressor 100 is used in the refrigeration device of the present invention, the embodiments of the refrigeration device of the present invention include all the technical solutions of all the embodiments of the compressor 100, and the achieved technical effects are identical, and are not described herein again.

It should be noted that, the specific form of the refrigeration device is not limited, and the refrigeration device may be an air conditioner, a fresh air fan, or other devices. Specifically, in this embodiment, the refrigeration apparatus is a refrigerator.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A compressor, comprising:

a housing having a via hole formed thereon;

2. The compressor as set forth in claim 1, wherein the first end of the second suction inner tube is connected to the second suction hole by a screw connection structure.

3. The compressor of claim 2, wherein the first end of the second suction inner tube is sleeved with a sleeve, the sleeve is provided with external threads, the second suction hole is provided with internal threads, and the sleeve is in threaded connection with the second suction hole.

4. The compressor of claim 3, wherein the second suction hole includes a first hole section and a second hole section which are sequentially provided from the outside of the cylinder toward the inside thereof, and a cross-sectional area of the first hole section is larger than that of the second hole Duan Da so as to form an outward stepped portion at a junction of the first hole section and the second hole section;

5. The compressor of claim 4, wherein the first end of the second suction inner tube is provided with a bent end, an everted first annular convex part is formed at the end of the bent end, the sleeve is sleeved at the bent end and limited by the first annular convex part, and the first annular convex part is butted with the step part.

6. The compressor of claim 5, wherein the port at the first end of the second suction inner tube is flared to form the first annular boss.

7. The compressor of claim 5, wherein a first seal ring is disposed between the first annular protrusion and the step.

8. The compressor of claim 1, wherein the second end of the second suction inner tube is connected to the second suction outer tube by a threaded structure.

9. The compressor of claim 8, wherein a second end of the second suction inner tube is provided with a threaded nipple;

10. The compressor of claim 9, wherein the threaded joint comprises:

11. The compressor of claim 10, wherein the port at the other end of the first screw is flared to form the second annular boss.

12. The compressor of claim 10, wherein a second seal ring is disposed between the second screw and the second suction inner tube.

13. The compressor of claim 1, wherein the piston has a first dead point at the bottom of the cylinder and a second dead point away from the bottom of the cylinder during the active stroke;

14. A refrigeration device comprising a compressor as claimed in claims 1 to 13.