Compressor and refrigeration equipment

Abstract

The compressor comprises a shell, a pump body, an air suction silencer, an air suction pipe and a heat insulation pipe, the shell is provided with a containing cavity, the pump body and the air suction silencer are respectively installed in the containing cavity, and the pump body comprises a crankcase, a cylinder body, a piston, a connecting rod, a crankshaft and an air suction and exhaust mechanism. The crankshaft is vertically installed in the crankcase, the cylinder body is connected to the crankcase, the piston is connected to an eccentric part of the crankshaft through a connecting rod, the piston can be driven by rotating motion of the crankshaft to reciprocate in the cylinder body, the air suction and exhaust mechanism is installed at the end of the cylinder body, the air suction silencer is connected with the air suction and exhaust mechanism, and the air suction silencer is provided with an air inlet hole. One end of the air suction pipe is located on the outer side of the shell, the other end of the air suction pipe is connected with the shell, one end of the heat insulation pipe is installed in the air suction pipe, the other end of the heat insulation pipe extends into the air inlet, and the refrigerating efficiency and the refrigerating performance of the compressor can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field, especially a kind of compressor and refrigeration equipment. BACKGROUND

[0002] Compressor is the key component in refrigeration system, compressor generally includes shell, suction muffler, suction pipe and heat insulation pipe, suction muffler is installed in shell, and suction muffler has sound attenuation cavity and air inlet hole, suction pipe is welded with shell, heat insulation pipe is arranged in suction pipe, to block the conduction of heat, and the refrigerant inhaled by suction pipe enters sound attenuation cavity in turn through heat insulation pipe and air inlet hole.The refrigerant that enters air inlet hole through heat insulation pipe is less when traditional compressor works, and the refrigeration performance of compressor is reduced. SUMMARY

[0003] The utility model at least solves one of the technical problems in prior art. To this end, the utility model provides a kind of compressor, which can improve the refrigeration performance of compressor.

[0004] The utility model further provides a kind of refrigeration equipment with the above-mentioned compressor.

[0005] According to the compressor of the first embodiment of the utility model, the compressor includes:

[0006] Shell, with accommodating cavity;

[0007] Pump body, in the accommodating cavity, the pump body includes crankcase, cylinder body, piston, connecting rod, crankshaft and suction and exhaust mechanism, the crankshaft is vertically installed in the crankcase, the cylinder body is arranged in the crankcase, the piston is connected to the eccentric portion of the crankshaft by the connecting rod, the piston can reciprocate in the cylinder body under the rotation of the crankshaft, and the suction and exhaust mechanism is installed at the end of the cylinder body;

[0008] Suction muffler, in the accommodating cavity, the suction muffler is connected to the suction and exhaust mechanism, and the suction muffler has air inlet hole;

[0009] Suction pipe, one end of the suction pipe is located outside the shell, and the other end of the suction pipe is connected to the shell;

[0010] Heat insulation pipe, one end of the heat insulation pipe is installed in the suction pipe, and the other end of the heat insulation pipe extends into the air inlet hole.

[0011] According to the compressor of the first embodiment of the utility model, at least has following beneficial effects:

[0012] When the compressor is working, the refrigerant drawn in through the suction pipe passes through the heat insulation pipe, the suction muffler, and the suction and exhaust mechanism into the cylinder. Driven by the rotation of the crankshaft, the eccentric part of the crankshaft drives the piston to reciprocate within the cylinder via the connecting rod, thereby compressing the refrigerant in the cylinder. Since the end of the heat insulation pipe away from the suction pipe extends into the intake port, more refrigerant can directly enter the suction muffler through the heat insulation pipe and the intake port. This reduces the amount of refrigerant overflowing from the suction muffler, effectively reducing suction overheating and thus improving the compressor's refrigeration efficiency and performance.

[0013] According to some embodiments of the present invention, the heat insulation pipe includes a first pipe segment and a second pipe segment connected in sequence. The end of the first pipe segment away from the second pipe segment extends into the air inlet. The end of the second pipe segment away from the first pipe segment is installed in the air intake pipe. The minimum inner diameter of the first pipe segment is D1, and the minimum inner diameter of the second pipe segment is D2, satisfying: D1 > D2.

[0014] According to some embodiments of the present invention, a snap-fit ​​structure is provided between the air intake tube and the second tube segment, and the second tube segment is installed on the air intake tube through the snap-fit ​​structure.

[0015] According to some embodiments of the present invention, the snap-fit ​​structure includes a snap-fit ​​protrusion and an annular groove for snap-fit ​​engagement. One of the snap-fit ​​protrusion and the annular groove is disposed on the inner wall of the air intake pipe, and the other is disposed on the outer peripheral wall of the second pipe section. The snap-fit ​​protrusion is accommodated in the annular groove and snaps against the side wall of the annular groove.

[0016] According to some embodiments of the present invention, the second pipe segment is provided with a plurality of elastic portions at one end away from the first pipe segment, and the plurality of elastic portions are arranged at intervals around the axis of the heat insulation pipe, and at least a portion of the snap-fit ​​protrusion is provided on the corresponding elastic portion.

[0017] According to some embodiments of the present invention, the heat insulation pipe further includes an annular protrusion, which is disposed on the outer peripheral wall of the first pipe section and abuts against the wall of the receiving cavity.

[0018] According to some embodiments of this utility model, the first pipe segment, the second pipe segment, and the annular protrusion are an integral structure.

[0019] According to some embodiments of this utility model, the thermal conductivity of the heat insulation tube is λ, which satisfies: λ≤2W / (m·K).

[0020] According to some embodiments of the present invention, in the axial direction of the heat insulation pipe, from the heat insulation pipe to the air intake silencer, the inner diameter of the air inlet gradually decreases.

[0021] According to some embodiments of this utility model, the intake pipe includes a third pipe section and a fourth pipe section connected in sequence. The end of the fourth pipe section away from the third pipe section is connected to the shell. The end of the heat insulation pipe away from the intake silencer is installed in the fourth pipe section. The minimum inner diameter of the third pipe section is D3, and the minimum inner diameter of the fourth pipe section is D4, satisfying: D3 < D4.

[0022] According to some embodiments of this utility model, the fourth pipe segment is a steel pipe, the third pipe segment is a copper pipe, and the third pipe segment and the fourth pipe segment are fixed together by welding; or...

[0023] The third pipe section and the fourth pipe section are an integral structure.

[0024] The refrigeration equipment according to the second embodiment of the present invention includes the compressor described in the above embodiments.

[0025] The refrigeration device according to the second embodiment of the present invention has at least the following beneficial effects:

[0026] The compressor of the first embodiment of this utility model operates as follows: when the compressor is working, the refrigerant drawn in through the suction pipe passes sequentially through the heat insulation pipe, the suction muffler, and the suction and exhaust mechanism into the cylinder. Driven by the rotation of the crankshaft, the eccentric part of the crankshaft drives the piston to reciprocate within the cylinder via the connecting rod, thereby compressing the refrigerant within the cylinder. Since the end of the heat insulation pipe away from the suction pipe extends into the air inlet, more mass of refrigerant can directly enter the suction muffler through the heat insulation pipe and the air inlet, reducing the overflow of refrigerant drawn in from the suction pipe out of the suction muffler. This effectively reduces suction overheating, thereby improving the compressor's refrigeration efficiency and performance.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 This is a schematic diagram of the internal structure of a compressor according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0031] Figure 3 This is a schematic diagram of the structure of a heat insulation pipe according to an embodiment of the present invention;

[0032] Figure 4This is a front view of a heat insulation pipe according to an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the internal structure of a heat insulation pipe according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the internal structure of a compressor according to another embodiment of the present invention;

[0035] Figure 7 for Figure 6 A magnified view of part B in the middle section;

[0036] Figure 8 This is a schematic diagram of the structure of a heat insulation pipe according to another embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the internal structure of the heat insulation pipe according to another embodiment of the present invention.

[0038] Icon labels:

[0039] The components include: housing 100, receiving cavity 110, intake silencer 200, air inlet 210, silencer cavity 220, intake pipe 300, annular groove 301, third pipe section 310, fourth pipe section 320, heat insulation pipe 400, axis O1, first pipe section 410, second pipe section 420, snap-fit ​​protrusion 421, elastic part 422, and annular protrusion 430. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0043] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0044] In related technologies, a compressor generally includes a housing, a suction muffler, a suction pipe, and a heat insulation pipe. The suction muffler is installed inside the housing and has a silencing chamber and an air inlet. The suction pipe is welded to the housing. The heat insulation pipe is placed inside the suction pipe to block heat conduction. The heat insulation pipe and the air inlet are spaced apart. The refrigerant drawn in through the suction pipe enters the silencing chamber sequentially through the heat insulation pipe and the air inlet. When the compressor is working, the temperature inside the compressor housing is higher than the temperature of the refrigerant drawn in through the suction pipe. In existing compressors, the heat insulation pipe and the air inlet of the suction muffler are spaced apart. The refrigerant flowing into the housing through the heat insulation pipe is prone to thermal expansion, resulting in less refrigerant entering the air inlet and reducing the compressor's cooling performance.

[0045] Reference Figure 1 , Figure 2 , Figure 1 This is a schematic diagram of the internal structure of a compressor according to an embodiment of the present invention. Figure 2 for Figure 1 A partial enlarged view of part A. As shown in the figure, the first embodiment of this utility model proposes a compressor, which includes a housing 100, a motor, a pump body, an intake muffler 200, an intake pipe 300, and a heat insulation pipe 400. The housing 100 has a receiving cavity 110, in which the motor, pump body, and intake muffler 200 are respectively installed. The motor includes a stator and a rotor rotatably disposed within the stator. The pump body includes a crankcase, a cylinder, a piston, a connecting rod, a crankshaft, and an intake / exhaust mechanism. The crankshaft is vertically installed within the crankcase, and the rotor is fixedly connected to the crankshaft. The cylinder is located on the upper side of the crankcase. One end of the connecting rod is connected to the piston, and the other end of the connecting rod is connected to the eccentric part of the crankshaft. The piston can reciprocate within the cylinder under the rotational motion of the crankshaft. The intake muffler 200 is installed at the end of the cylinder block and connected to the intake and exhaust mechanism. The intake muffler 200 has an intake port 210 and an intake pipe 300, which is a straight pipe structure. One end of the intake pipe 300 is located outside the housing 100, and the other end of the intake pipe 300 is connected to the housing 100. One end of the heat insulation pipe 400 is installed inside the intake pipe 300, and the other end of the heat insulation pipe 400 extends into the intake port 210. In this way, more refrigerant can directly enter the intake muffler 200 through the heat insulation pipe 400 and the intake port 210, which can reduce the refrigerant overflow from the intake muffler 200 drawn in from the intake pipe 300. This can effectively reduce intake overheating, thereby improving the compressor's refrigeration efficiency and performance.

[0046] For example, when the compressor is working, the refrigerant drawn in through the suction pipe 300 passes through the heat insulation pipe 400, the suction muffler 200, and the suction and exhaust mechanism into the cylinder. The stator drives the rotor to rotate the crankshaft. Under the rotation of the crankshaft, the eccentric part of the crankshaft drives the piston to reciprocate within the cylinder via the connecting rod, thereby compressing the refrigerant in the cylinder. Since the end of the heat insulation pipe 400 away from the suction pipe 300 extends into the intake port 210, more mass of refrigerant can directly enter the suction muffler 200 through the heat insulation pipe 400 and the intake port 210. This reduces the amount of refrigerant overflowing from the suction muffler 200 drawn in through the suction pipe 300, effectively reducing suction overheating and thus improving the compressor's refrigeration efficiency and performance.

[0047] It should be noted that the intake and exhaust mechanism includes a valve plate, intake valve plate, exhaust valve plate, and cylinder head. The valve plate is mounted on the end of the cylinder block, and the cylinder head covers the valve plate on the side opposite to the cylinder block. The valve plate has an intake port and an exhaust port. The intake valve plate and exhaust valve plate are respectively located on the valve plate. The intake valve plate is used to open or close the intake port, and the exhaust valve plate is used to open or close the exhaust port. During intake, the intake valve plate opens the intake port, while the exhaust valve plate closes the exhaust port to allow the cylinder block to draw in air. During exhaust, the intake valve plate closes the intake port, and the exhaust valve plate opens the exhaust port to expel high-pressure gas from the cylinder block. Further details are omitted here. The valve plate, intake valve plate, exhaust valve plate, and cylinder head are not shown in the figures, but these components are known technologies and are not considered limiting.

[0048] It should be noted that the intake muffler 200 also has a muffler chamber 220 and an exhaust port. The exhaust port and the intake port 210 are respectively connected to the muffler chamber 220, and the exhaust port is connected to the intake port. When the compressor is working, the refrigerant drawn in by the intake pipe 300 enters the cylinder body through the heat insulation pipe 400, the intake port 210, the muffler chamber 220, the exhaust port and the intake port in sequence. The refrigerant is silenced in the muffler chamber to reduce the intake noise when the compressor is working, thereby improving the user experience. This will not be elaborated further here.

[0049] It should be noted that the crankcase, cylinder block, piston, connecting rod, and intake / exhaust mechanism are not shown in the figure. The crankcase, cylinder block, piston, connecting rod, and intake / exhaust mechanism are known technologies and are not limited here.

[0050] Reference Figure 2 , Figure 9 and combined Figures 5 to 7 , Figure 5 This is a schematic diagram of the internal structure of the heat insulation pipe 400 according to one embodiment of the present invention. Figure 6 This is a schematic diagram of the internal structure of the compressor according to another embodiment of the present invention. Figure 7 for Figure 6A magnified view of part B in the middle section. Figure 9 This is a schematic diagram of the internal structure of the heat insulation pipe 400 according to another embodiment of the present invention. As shown in the figure, in this embodiment, the heat insulation pipe 400 includes a first pipe section 410 and a second pipe section 420 arranged coaxially. One end of the first pipe section 410 is connected to one end of the second pipe section 420. The end of the first pipe section 410 away from the second pipe section 420 extends into the air inlet 210. The end of the second pipe section 420 away from the first pipe section 410 is installed in the suction pipe 300. The minimum inner diameter of the first pipe section 410 is D1, and the minimum inner diameter of the second pipe section 420 is D2, satisfying: D1 > D2, that is, the minimum inner diameter of the first pipe section 410 is greater than the minimum inner diameter of the second pipe section 420. This can increase the effective flow area of ​​the first pipe section 410, which is beneficial to reduce the flow resistance of the refrigerant, increase the flow rate of the refrigerant in the heat insulation pipe 400, and thus improve the cooling performance of the compressor.

[0051] It should be noted that "the end of the second tube segment 420 away from the first tube segment 410 is installed inside the suction tube 300" means that the second tube segment 420 is completely installed in the suction tube 300, or that part of the second tube segment 420 is installed in the suction tube 300 and the other part of the second tube segment 420 extends out of the suction tube 300. No restrictions are imposed here.

[0052] Of course, in some other specific embodiments, the minimum inner diameter of the first pipe section 410 may also be equal to the minimum inner diameter of the second pipe section 420, and this is not a limitation.

[0053] Reference Figures 2 to 4 , Figure 3 This is a schematic diagram of the structure of the heat insulation pipe 400 according to one embodiment of the present invention. Figure 4 This is a front view of the heat insulation pipe 400 according to an embodiment of the present invention. As shown in the figure, in this embodiment, a snap-fit ​​structure is provided between the suction pipe 300 and the second pipe section 420. The second pipe section 420 is installed on the suction pipe 300 through the snap-fit ​​structure, which simplifies the installation steps of the heat insulation pipe 400, improves the assembly efficiency of the heat insulation pipe 400, and thus improves the production efficiency of the compressor.

[0054] For example, the snap-fit ​​structure includes a snap-fit ​​protrusion 421 on the outer peripheral wall of the second pipe section 420 and an annular groove 301 in the suction pipe 300. The annular groove 301 extends around the axis of the suction pipe 300. Three snap-fit ​​protrusions 421 are arranged at intervals around the axis O1 of the heat insulation pipe 400. When assembling the heat insulation pipe 400, the second pipe section 420 is inserted into the suction pipe 300 from the receiving cavity 110, so that the snap-fit ​​protrusion 421 is accommodated in the annular groove 301 and snaps against the side wall of the annular groove 301. This restricts the movement of the heat insulation pipe 400 in the direction of exiting the suction pipe 300, simplifies the installation steps of the heat insulation pipe 400, improves the assembly efficiency of the heat insulation pipe 400, and thus improves the production efficiency of the compressor.

[0055] It should be noted that the snap-fit ​​protrusion 421 is a wedge-shaped block structure. There can be one, two, or four snap-fit ​​protrusions 421, which will not be elaborated here.

[0056] It should be noted that the positions of the snap-fit ​​protrusion 421 and the annular groove 301 can be interchanged. That is, the snap-fit ​​protrusion 421 is located on the inner wall of the suction pipe 300, and the annular groove 301 is located on the outer peripheral wall of the second pipe section 420. The snap-fit ​​protrusion 421 can also snap into the side wall of the annular groove 301. This is not a limitation.

[0057] As another implementation, the snap-fit ​​structure can also be a structure in which a hook and a slot cooperate. For example, the hook is provided on the outer peripheral wall of the second pipe section 420, and the slot is provided on the inner wall of the intake pipe 300. The hook part of the hook is accommodated in the slot and snaps into the side wall of the slot. This can also simplify the installation steps of the heat insulation pipe 400 and improve the assembly efficiency of the heat insulation pipe 400.

[0058] For example Figure 3 , Figure 4 As shown in this embodiment, the second pipe section 420 is provided with three elastic portions 422 at the end away from the first pipe section 410. The number of elastic portions 422 is equal to the number of snap-fit ​​protrusions 421, and the elastic portions 422 correspond one-to-one with the snap-fit ​​protrusions 421. The portion of the snap-fit ​​protrusion 421 is located on the corresponding elastic portion 422. By providing the elastic portion 422, when the heat insulation pipe 400 is installed, the snap-fit ​​protrusion 421 abuts against the inner wall of the air intake pipe 300, and the elastic portion 422 can move elastically along the axis O1 close to the heat insulation pipe 400 to reduce the movement resistance of the heat insulation pipe 400 and facilitate the installation of the heat insulation pipe 400.

[0059] For example, when installing the heat insulation tube 400, the heat insulation tube 400 is inserted into the suction tube 300 from the receiving cavity 110. At this time, the snap-fit ​​protrusion 421 abuts against the inner wall of the suction tube 300. Since the elastic part 422 is elastic, the elastic part 422 can move elastically in the direction close to the axis O1 of the heat insulation tube 400 to reduce the movement resistance of the heat insulation tube 400. When the snap-fit ​​protrusion 421 moves to the position corresponding to the annular groove 301, the elastic part 422 rebounds under its own elasticity, so that the snap-fit ​​protrusion 421 enters the annular groove 301, so that the snap-fit ​​protrusion 421 is snapped against the side wall of the annular groove 301. The operation is simple, convenient and quick, and it is easy to install the heat insulation tube 400.

[0060] It should be noted that the elastic part 422 can be configured with one, two or four, etc., and there is no limitation here.

[0061] As another implementation, the snap-fit ​​protrusion 421 can also be completely provided on the corresponding elastic part 422, which can reduce the movement resistance of the second tube section 420 in the suction tube 300, and is not limited here.

[0062] For example Figure 2 , Figure 3 As shown, in this embodiment, the heat insulation pipe 400 also includes an annular protrusion 430. The annular protrusion 430 is disposed on the outer peripheral wall of the first pipe section 410. The annular protrusion 430 extends around the axis O1 of the heat insulation pipe 400. When the heat insulation pipe 400 is connected to the suction pipe 300, the annular protrusion 430 abuts against the wall of the receiving cavity 110. The annular protrusion 430 can block the gap between the housing 100 and the suction pipe 300, and can prevent the refrigerant lubricating oil in the receiving cavity 110 from flowing into the suction pipe 300 along the inner wall of the housing 100.

[0063] It should be noted that the housing 100 is provided with a through hole that connects to the receiving cavity 110. The end of the intake pipe 300 near the intake muffler 200 can be accommodated in the through hole, and the end of the intake pipe 300 near the intake muffler 200 can also protrude from the inner wall of the housing 100. No restrictions are imposed here.

[0064] In this embodiment, the first pipe section 410, the second pipe section 420, and the annular protrusion 430 are integral structures. The first pipe section 410, the second pipe section 420, and the annular protrusion 430 can be integrally formed by injection molding, which can reduce the number of molds, thereby reducing the production and manufacturing cost of the molds and thus reducing the production and manufacturing cost of the compressor.

[0065] In another embodiment, the first pipe segment 410 can be fixedly connected to the second pipe segment 420 by welding, and the annular protrusion 430 can be fixedly connected to the first pipe segment 410 by welding. The welding method includes, but is not limited to, resistance welding, laser welding or ultrasonic welding, etc., which will not be described in detail here.

[0066] In this embodiment, the thermal conductivity of the heat insulation tube 400 is λ, which satisfies: λ≤2W / (m·K), so that the heat insulation tube 400 has good heat insulation performance, which can effectively reduce the superheating of the suction gas, thereby improving the refrigeration efficiency and performance of the compressor.

[0067] For example, the heat insulation tube 400 can be made of non-metallic materials, such as fluororubber or PBT plastic. Fluororubber and PBT plastic have higher structural strength, stronger corrosion resistance, and are more durable. Alternatively, the heat insulation tube 400 can also be made of composite materials, such as copper sheets embedded in fluororubber, which can also make the thermal conductivity of the heat insulation tube 400 less than 2 W / (m·K).

[0068] It should be noted that the thermal conductivity λ of the heat insulation pipe 400 can be 0.1W / (m·K), 0.2W / (m·K), 0.3W / (m·K), 0.4W / (m·K), 0.5W / (m·K), 0.6W / (m·K), 0.7W / (m·K), 0.8W / (m·K), 0.9W / (m·K), 1W / (m·K), 1.1W / (m·K), 1.2W / (m·K), 1.3W / (m·K), 1.4W / (m·K), 1.5W / (m·K), 1.6W / (m·K), 1.7W / (m·K), 1.8W / (m·K), 1.9W / (m·K), or 2W / (m·K), and there are no restrictions here.

[0069] It should be noted that thermal conductivity refers to the amount of heat that can be transferred per second when there is a 1 Kelvin temperature difference on both sides of a meter of material under steady heat transfer conditions. Here, W represents watts, m represents meters, and K represents the Kelvin temperature difference, which will not be elaborated further here.

[0070] In this embodiment, along the axial direction of the heat insulation pipe 400, from the heat insulation pipe 400 to the intake silencer 200, the inner diameter of the air inlet 210 gradually decreases, which can guide more mass of refrigerant from the air inlet 210 into the interior of the intake silencer 200, thereby improving the cooling performance of the compressor.

[0071] For example, the air inlet 210 has a trumpet-shaped structure. From the heat insulation pipe 400 to the intake muffler 200, the inner diameter of the air inlet 210 gradually narrows. On the one hand, it can guide the refrigerant drawn in from the intake pipe 300 into the intake muffler 200. On the other hand, when the intake and exhaust mechanism is drawing in air, the refrigerant in the housing 100 can also be drawn into the intake muffler. This can guide more mass of refrigerant from the air inlet 210 into the intake muffler 200, thereby improving the cooling performance of the compressor.

[0072] In this embodiment, the intake pipe 300 includes a third pipe section 310 and a fourth pipe section 320. One end of the third pipe section 310 is connected to one end of the fourth pipe section 320. The end of the fourth pipe section 320 away from the third pipe section 310 is connected to the housing 100. The end of the third pipe section 310 away from the fourth pipe section 320 is located outside the housing 100. The minimum inner diameter of the third pipe section 310 is D3, and the minimum inner diameter of the fourth pipe section 320 is D4, satisfying that D3 < D4. When the second pipe section 420 is installed inside the fourth pipe section 320, the end of the second pipe section 420 away from the first pipe section 410 can abut against the end of the third pipe section 310 to position the second pipe section 420 inside the fourth pipe section 320, which facilitates the installation and positioning of the heat insulation pipe 400.

[0073] It should be noted that the minimum inner diameter of the second pipe section 420 is greater than or equal to the minimum inner diameter of the third pipe section 310, which can increase the effective flow area of ​​the second pipe section 420, which helps to reduce the flow resistance of the refrigerant, increase the flow rate of the refrigerant in the heat insulation pipe 400, and thus improve the cooling performance of the compressor.

[0074] It should be noted that the end of the fourth pipe section 320 furthest from the third pipe section 310 is connected to the housing 100 by welding, so that the intake pipe 300 and the housing 100 are stably connected, which can improve the installation reliability of the intake pipe 300. This will not be described in detail here.

[0075] It should be noted that when assembling the compressor, the end of the fourth pipe section 320 away from the third pipe section 310 is first welded to the housing 100, and then the heat insulation pipe 400 is inserted from the receiving cavity 110 into the fourth pipe section 320. After that, the pump body and motor are installed in the housing 100, which facilitates the assembly of the compressor.

[0076] In this embodiment, the third pipe section 310 and the fourth pipe section 320 are integral structures. The third pipe section 310 and the fourth pipe section 320 can be integrally formed by extrusion molding. For example, the third pipe section 310 and the fourth pipe section 320 are both copper pipes, which can reduce the number of molds, thereby reducing the production and manufacturing cost of the molds and thus reducing the production and manufacturing cost of the compressor.

[0077] For example Figure 6 ,Figure 7 As shown, in this embodiment, both the third pipe segment 310 and the fourth pipe segment 320 are straight tubular structures. The third pipe segment 310 is made of copper, and the fourth pipe segment 320 is made of steel. The material of the fourth pipe segment 320 is the same as that of the shell 100. The third pipe segment 310 and the fourth pipe segment 320 are fixed together by welding. Since steel pipes have higher structural strength and the shell 100 is also made of steel, the fourth pipe segment 320 can better fuse with the shell 100 during welding, thereby improving the welding quality of the fourth pipe segment 320. The welding methods include, but are not limited to, resistance welding, laser welding, or ultrasonic welding.

[0078] As another implementation, the third pipe section 310 and / or the fourth pipe section 320 may also be a bent pipe structure, which is not limited here.

[0079] Reference Figure 8 , Figure 8 This is a schematic diagram of the structure of the heat insulation pipe 400 according to another embodiment of the present invention. As shown in the figure, in this embodiment, the second pipe section 420 can also be connected to the third pipe section 310 by threaded connection, bonding, welding or interference fit. For example, when the second pipe section 420 and the third pipe section 310 are threadedly connected, the second pipe section 420 is provided with external thread and the third pipe section 310 is provided with internal thread, and the external thread and the internal thread are threadedly engaged; or, when the second pipe section 420 and the third pipe section 310 are bonded, an adhesive layer is provided between the outer peripheral wall of the second pipe section 420 and the inner peripheral wall of the third pipe section 310. The adhesive layer can be the state after the glue has cured, which can also facilitate the assembly of the heat insulation pipe 400.

[0080] The refrigeration device of the third embodiment of this utility model includes the compressor of the above embodiments. The refrigeration device can be a refrigerator, freezer, or wine cabinet, etc.

[0081] For example, in the compressor of the first embodiment of this utility model, when the compressor is working, the refrigerant drawn in by the suction pipe 300 passes through the heat insulation pipe 400, the suction muffler 200, and the suction and exhaust mechanism into the cylinder. The stator drives the rotor to rotate the crankshaft. Under the rotation of the crankshaft, the eccentric part of the crankshaft drives the piston to reciprocate in the cylinder through the connecting rod to compress the refrigerant in the cylinder. Since the end of the heat insulation pipe 400 away from the suction pipe 300 extends into the air inlet 210, more mass of refrigerant can directly enter the suction muffler 200 through the heat insulation pipe 400 and the air inlet 210. This can reduce the overflow of refrigerant drawn in from the suction pipe 300 out of the suction muffler 200, effectively reduce suction overheating, thereby improving the refrigeration efficiency and performance of the compressor.

[0082] Since the refrigeration equipment adopts all the technical solutions of the compressor in the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments, which will not be repeated here.

[0083] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiment. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A compressor, characterized in that, include: The shell has a receiving cavity; A pump body is disposed within the receiving cavity. The pump body includes a crankcase, a cylinder block, a piston, a connecting rod, a crankshaft, and an intake / exhaust mechanism. The crankshaft is vertically installed within the crankcase, and the cylinder block is disposed within the crankcase. The piston is connected to the eccentric portion of the crankshaft via the connecting rod. The piston can reciprocate within the cylinder block under the rotational motion of the crankshaft. The intake / exhaust mechanism is installed at the end of the cylinder block. An intake muffler is disposed within the receiving cavity, the intake muffler is connected to the intake and exhaust mechanism, and the intake muffler has an air inlet. An air intake tube, one end of which is located on the outside of the housing, and the other end of which is connected to the housing; A heat insulation tube, one end of which is installed inside the air intake tube, and the other end of which extends into the air inlet.

2. The compressor according to claim 1, characterized in that: The heat insulation pipe includes a first pipe section and a second pipe section connected in sequence. The end of the first pipe section away from the second pipe section extends into the air inlet. The end of the second pipe section away from the first pipe section is installed in the air intake pipe. The minimum inner diameter of the first pipe section is D1, and the minimum inner diameter of the second pipe section is D2, satisfying: D1 > D2.

3. The compressor according to claim 2, characterized in that: A snap-fit ​​structure is provided between the air intake tube and the second tube segment, and the second tube segment is installed on the air intake tube through the snap-fit ​​structure.

4. The compressor according to claim 3, characterized in that: The snap-fit ​​structure includes a snap-fit ​​protrusion and an annular groove. One of the snap-fit ​​protrusion and the annular groove is located on the inner wall of the intake pipe, and the other is located on the outer peripheral wall of the second pipe section. The snap-fit ​​protrusion is accommodated in the annular groove and snaps against the side wall of the annular groove.

5. The compressor according to claim 4, characterized in that: The second pipe section has a plurality of elastic parts at one end away from the first pipe section. The plurality of elastic parts are arranged at intervals around the axis of the heat insulation pipe, and at least a portion of the snap-fit ​​protrusion is provided on the corresponding elastic part.

6. The compressor according to claim 2, characterized in that: The heat insulation pipe also includes an annular protrusion, which is disposed on the outer peripheral wall of the first pipe section and abuts against the wall of the receiving cavity.

7. The compressor according to claim 6, characterized in that: The first pipe section, the second pipe section, and the annular protrusion are an integral structure.

8. The compressor according to claim 1, characterized in that: The thermal conductivity of the heat insulation pipe is λ, which satisfies: λ≤2W / (m·K).

9. The compressor according to claim 1, characterized in that: Along the axial direction of the heat insulation pipe, from the heat insulation pipe to the intake muffler, the inner diameter of the air inlet gradually decreases.

10. The compressor according to claim 1, characterized in that: The intake pipe includes a third pipe section and a fourth pipe section connected in sequence. The end of the fourth pipe section away from the third pipe section is connected to the housing. The end of the heat insulation pipe away from the intake silencer is installed in the fourth pipe section. The minimum inner diameter of the third pipe section is D3, and the minimum inner diameter of the fourth pipe section is D4, satisfying: D3 < D4.

11. The compressor according to claim 10, characterized in that: The fourth pipe section is a steel pipe, and the third pipe section is a copper pipe; the third pipe section and the fourth pipe section are fixed together by welding. Alternatively... The third pipe section and the fourth pipe section are an integral structure.

12. A refrigeration device, characterized in that: Includes the compressor described in any one of claims 1-11.

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