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, the pump body comprises a crank case, a cylinder body, a piston, a connecting rod, a crank shaft and an air suction and exhaust mechanism, the crank shaft is vertically installed in the crank case, and the air suction and exhaust mechanism is installed in the cylinder body. 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 a silencing cavity, an air inlet hole and a channel. The air suction pipe penetrates into 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, the air outlet of the heat insulation pipe faces the channel, and the refrigeration performance of the compressor can be improved.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a compressor and refrigeration equipment. Background Technology

[0002] The compressor is a key component in a refrigeration system. A compressor typically 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, a channel, and an air inlet. The suction pipe is welded to the housing. The heat insulation pipe is located inside the suction pipe to block heat conduction. The refrigerant drawn in through the suction pipe passes sequentially through the heat insulation pipe, the air inlet, and the channel into the silencing chamber. During the process of the refrigerant entering the air inlet from the heat insulation pipe, the refrigerant's suction temperature is much lower than the housing temperature and the internal temperature of the housing. The refrigerant is heated by various high-temperature media, leading to a decrease in the compressor's refrigeration performance. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a compressor that can improve the refrigeration performance of the compressor.

[0004] This utility model also proposes a refrigeration device having the above-mentioned compressor.

[0005] According to a first aspect embodiment of the present invention, the compressor includes:

[0006] The shell has a receiving cavity;

[0007] 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.

[0008] An intake muffler is disposed within the receiving cavity. The intake muffler is connected to the intake and exhaust mechanism. The intake muffler has a muffler cavity, an air inlet, and a channel. The air inlet communicates with the muffler cavity through the channel.

[0009] 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;

[0010] A heat insulation tube is provided, with one end installed inside the suction tube and the other end extending into the air inlet. The outlet of the heat insulation tube faces the channel. The refrigerant drawn in from the suction tube flows into the silencer cavity through the outlet, the air inlet, and the channel in sequence.

[0011] The compressor according to the first aspect of the present invention has at least the following beneficial effects:

[0012] 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 discharge 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 within the cylinder. Since the other end of the heat insulation pipe extends into the intake port and the outlet faces the channel, the refrigerant drawn in through the heat insulation pipe can directly enter the muffler chamber through the channel. This avoids the refrigerant drawn in through the heat insulation pipe directly colliding with the wall of the intake port, reducing the overflow of refrigerant drawn in through the suction pipe from the suction muffler, and preventing the refrigerant drawn in through the suction pipe from being heated by the wall of the intake port. This effectively reduces suction overheating, thereby improving the compressor's refrigeration efficiency and performance.

[0013] According to some embodiments of this utility model, the minimum included angle between the axis of the air outlet and the axis of the channel is θ, which satisfies: θ≤15°.

[0014] 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 second pipe segment being inserted into the air intake pipe, the first pipe segment being located in the receiving cavity, and the first pipe segment and the second pipe segment being bent.

[0015] According to some embodiments of this utility model, the minimum diameter of the first pipe segment is D1, and the minimum diameter of the second pipe segment is D2, satisfying that D1 > D2.

[0016] According to some embodiments of this utility model, the thermal conductivity of the heat insulation tube is λ, which satisfies: λ≤1W / (m·K).

[0017] According to some embodiments of the present invention, the suction tube includes a third tube segment and a fourth tube segment connected in sequence. The end of the fourth tube segment away from the third tube segment is connected to the housing. At least a portion of the first tube segment is installed inside the fourth tube segment. The minimum inner diameter of the third tube segment is D3, and the minimum inner diameter of the fourth tube segment is D4, satisfying that D4 > D3.

[0018] According to some embodiments of the present invention, the compressor further includes an exhaust muffler, an inner exhaust pipe, an outer exhaust pipe, and a limiting member. The exhaust muffler is connected to the intake and exhaust mechanism. One end of the inner exhaust pipe is connected to the exhaust port of the exhaust muffler, and the other end of the inner exhaust pipe is provided with a mating part. One end of the outer exhaust pipe extends to the outside of the housing, and the other end of the outer exhaust pipe is provided with a fixing part. The mating part and the fixing part are inserted and connected. The limiting member is provided between the mating part and the fixing part, and the limiting member is used to restrict the separation of the mating part and the fixing part.

[0019] According to some embodiments of the present invention, the mating part is inserted into the fixing part, and the limiting member is sleeved on the outer periphery of the fixing part and detachably connected to the fixing part, and the mating part can abut against the limiting member.

[0020] According to some embodiments of this utility model, the limiting member is provided with an internal thread structure, and the outer peripheral wall of the fixing part is provided with an external thread structure that matches the internal thread structure, so that the limiting member and the fixing part are connected by threads; or...

[0021] One of the inner peripheral wall of the limiting member and the outer peripheral wall of the fixing part is provided with a slot, and the other is provided with a snap-fit ​​protrusion, which snaps into the side wall of the slot.

[0022] According to some embodiments of the present invention, at least one sealing element is provided between the mating part and the fixing part.

[0023] According to some embodiments of the present invention, the external exhaust pipe includes a fifth pipe section and a sixth pipe section connected in sequence, the fixing part is provided on the sixth pipe section, the minimum inner diameter of the fifth pipe section is D5, and the minimum inner diameter of the sixth pipe section is D6, satisfying: D6 > D5.

[0024] According to some embodiments of the present invention, the intake pipe and the exhaust pipe are respectively located on opposite sides of the housing along a first direction, the first direction being coincident with the axis of the piston, or the first direction being a straight line passing through the center of the housing and perpendicular to the axis of the piston.

[0025] The refrigeration equipment according to a second aspect of the present invention includes the compressor described in the above embodiments.

[0026] The refrigeration device according to the second aspect embodiment of the present invention has at least the following beneficial effects:

[0027] The compressor using the first aspect of this utility model operates as follows: When the compressor is working, the refrigerant drawn in through the suction pipe sequentially passes through the heat insulation pipe, the suction muffler, and the suction / exhaust mechanism into the cylinder. The stator drives the rotor to rotate the crankshaft. Under the rotational motion 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 other end of the heat insulation pipe extends into the inlet hole and the outlet faces the channel, the refrigerant drawn in from the heat insulation pipe can directly enter the muffler chamber through the channel. This avoids the refrigerant drawn in from the heat insulation pipe directly colliding with the wall of the inlet hole, reducing the overflow of refrigerant drawn in from the suction pipe from the suction muffler, and preventing the refrigerant drawn in from the suction pipe from being heated by the wall of the inlet hole. This effectively reduces suction overheating, thereby improving the compressor's cooling efficiency and performance.

[0028] 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

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 This is a cross-sectional view of the compressor according to an embodiment of the present invention, with the pump body hidden in the figure;

[0031] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0032] Figure 3 This is a schematic diagram of the structure of the heat insulation pipe according to an embodiment of the present utility model;

[0033] Figure 4 This is a cross-sectional view of the heat insulation pipe according to an embodiment of the present utility model;

[0034] Figure 5 This is a cross-sectional view of the compressor according to an embodiment of the present invention from another perspective, with the pump body hidden in the figure;

[0035] Figure 6 for Figure 5 A magnified view of part B in the middle section;

[0036] Figure 7 This is an assembly diagram of the exhaust muffler, inner exhaust pipe, and outer exhaust pipe according to an embodiment of the present utility model.

[0037] Icon labels:

[0038] Housing 100, receiving cavity 110, intake silencer 200, air inlet 210, silencer cavity 220, channel 230, intake pipe 300, annular groove 301, third pipe section 310, second transition section 311, fourth pipe section 320, heat insulation pipe 400, air outlet 401, first pipe section 410, second pipe section 420, snap-fit ​​block 421, elastic part 422, first transition section 423, annular protrusion 430, exhaust silencer 510, inner exhaust pipe 520, mating part 521, first connecting section 522, spiral section 523, second connecting section 524, external exhaust pipe 530, fixing part 531, fifth pipe section 532, sixth pipe section 533, limiting member 540, connecting cylinder 541, limiting step 542, sealing member 550, sealing groove 551, short axis 610, long axis 620. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] In related technologies, the compressor is a key component of a refrigeration system. 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, a channel, and an air inlet. The suction pipe is welded to the housing, and the heat insulation pipe is installed inside the suction pipe to block heat conduction. The refrigerant drawn in through the suction pipe sequentially enters the silencing chamber through the heat insulation pipe, the air inlet, and the channel. During the process of the refrigerant entering the air inlet from the heat insulation pipe, the refrigerant's suction temperature is much lower than the housing temperature and the internal temperature of the housing. The refrigerant is heated by various high-temperature media, leading to a decrease in the compressor's refrigeration performance.

[0044] Based on this, refer to Figure 1 , Figure 2 , Figure 1 This is a cross-sectional view of the compressor according to an embodiment of the present invention. Figure 1 The pump body is hidden inside. Figure 2 for Figure 1 A magnified view of part A in the image. For example... Figure 1 , Figure 2 As shown, the first aspect of this utility model provides 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. The motor, pump body, and intake muffler 200 are respectively installed in different positions within the receiving cavity 110. 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 in 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 / exhaust mechanism is installed at the end of the cylinder, and the intake muffler 200 is connected to the intake / exhaust mechanism. The intake muffler 200 has an air inlet 210, a channel 230, and a muffler chamber 220. One end of the channel 230 communicates with the air inlet 210. The other end of the channel 230 is connected to the silencing cavity 220. The intake pipe 300 is a straight pipe structure. One end of the intake pipe 300 is located outside the housing 100, and the other end 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 air inlet 210. The other end of the heat insulation pipe 400 has an air outlet 401 facing the channel 230. Thus, air flows from the heat insulation pipe 40... The refrigerant drawn in from the 0 can directly enter the silencer chamber 220 through the channel 230, which can prevent the refrigerant drawn in from the heat insulation pipe 400 from directly colliding with the hole wall of the inlet 210. This can reduce the overflow of refrigerant drawn in from the suction pipe 300 out of the suction silencer 200 and prevent the refrigerant drawn in from the suction pipe 300 from being heated by the hole wall of the inlet 210. This can effectively reduce suction overheating, thereby improving the compressor's refrigeration efficiency and enhancing its refrigeration performance.

[0045] 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 discharge 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 other end of the heat insulation pipe 400 extends into the inlet port 210 and the outlet 401 faces the channel 230, the refrigerant drawn in through the heat insulation pipe 400 can directly enter the muffler chamber 220 through the channel 230. This avoids the refrigerant drawn in through the heat insulation pipe 400 from directly colliding with the wall of the inlet port 210, reduces the overflow of refrigerant drawn in through the suction pipe 300 from the suction muffler 200, and prevents the refrigerant drawn in through the suction pipe 300 from being heated by the wall of the inlet port 210. This effectively reduces suction overheating, thereby improving the compressor's refrigeration efficiency and performance.

[0046] It should be noted that "air outlet 401 facing channel 230" means that air outlet 401 and channel 230 are set opposite to each other, that is, the axis of air outlet 401 is collinear with the axis of channel 230; or, "air outlet 401 facing channel 230" means that the axis of air outlet 401 is offset from the axis of channel 230 by a certain angle.

[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 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.

[0049] It is understandable that the crankcase and cylinder block can be an integral structure, that is, the crankcase and cylinder block can be integrally formed by die casting, or the crankcase and cylinder block can be a separate structure, and the crankcase and cylinder block can be fixedly connected by welding or bolts, which will not be elaborated here.

[0050] For example Figure 2 As shown, in this embodiment, the minimum angle between the axis of the outlet 401 and the axis of the channel 230 is θ, which satisfies: θ≤15°. This avoids the refrigerant from colliding with the wall of the inlet 210, thereby preventing the refrigerant from being heated by the suction silencer 200 within the inlet 210. This effectively reduces suction overheating and improves the compressor's cooling performance. For example, when the minimum angle θ between the axis of the outlet 401 and the axis of the channel 230 is greater than 15°, the angle θ is too large. The refrigerant drawn in from the outlet 401 directly collides with the wall of the inlet 210, reducing the refrigerant flow rate. Furthermore, the refrigerant is heated by the suction silencer 200 within the inlet 210, leading to compressor suction overheating and reduced compressor cooling performance. Therefore, by rationally designing the minimum angle θ between the axis of the outlet 401 and the axis of the channel 230, the superheating of the intake can be effectively reduced, thereby improving the cooling performance of the compressor.

[0051] It should be noted that the value of θ can be 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, etc. When θ is 0°, the axis of the outlet 401 is parallel to the axis of the channel 230, meaning the refrigerant drawn in from the outlet 401 flows in the same direction as the axis of the channel 230. This effectively reduces intake overheating, which will not be elaborated upon here.

[0052] Reference Figure 3 , Figure 4 , Figure 3 This is a schematic diagram of the structure of the heat insulation tube 400 according to an embodiment of the present invention. Figure 4 for Figure 3 A partial enlarged view of part A. 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. The first pipe section 410 is a curved pipe section, and the second pipe section 420 is a straight pipe section. 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, and the end of the second pipe section 420 away from the first pipe section 410 is installed in the suction pipe 300. The second pipe section 420 and the suction pipe 300 are coaxially arranged, which can change the flow direction of the refrigerant in the heat insulation pipe 400 so that the air outlet 401 faces the channel 230. This can prevent the refrigerant sucked in from the heat insulation pipe 400 from directly colliding with the hole wall of the air inlet 210, thereby improving the cooling performance of the compressor.

[0053] It is understandable that the peripheral wall of the housing 100 is curved, and the suction pipe 300 is a straight pipe structure. Taking the plane perpendicular to the axis of the suction pipe 300 as the reference plane, since the internal space of the housing 100 is limited, in order to improve the welding strength of the suction pipe 300, it is necessary to ensure that the reference plane is the tangent at the welding position of the housing 100 and the suction pipe 300, so that the wall thickness at the welding position of the housing 100 and the suction pipe 300 is uniform. By designing the first pipe section 410 as a curved pipe section, the flow direction of the refrigerant in the heat insulation pipe 400 can be changed. On the basis of ensuring the welding strength of the housing 100 and the suction pipe 300, the existing design shape of the housing 100 and the suction pipe 300 can be changed, and the cooling performance of the compressor can be improved.

[0054] In another implementation, the first pipe section 410 can also be a straight pipe structure. In this case, the first pipe section 410 and the second pipe section 420 are bent, which can also change the flow direction of the refrigerant in the insulation pipe 400. For example, the angle between the axis of the first pipe section 410 and the axis of the second pipe section 420 is greater than 90°, which ensures that the airflow direction is smoother and the airflow transition is more stable, thereby reducing the vibration of the insulation pipe 400.

[0055] 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.

[0056] For example Figure 4 As shown, in this embodiment, the minimum diameter of the first pipe section 410 is D1, and the minimum diameter of the second pipe section 420 is D2, satisfying that D1 > D2. This increases the effective flow area of ​​the first pipe section 410, 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.

[0057] In this embodiment, a first transition section 423 is provided at one end of the second pipe section 420 near the first pipe section 410. The second pipe section 420 is transitionally connected to the first pipe section 410 through the first transition section 423. From the second pipe section 420 to the first pipe section 410, the inner diameter of the first transition section 423 gradually increases, which can guide the refrigerant in the heat insulation pipe 400 to flow from the second pipe section 200 to the first pipe section 100, so that the flow trajectory of the refrigerant in the heat insulation pipe 400 is more regular, thereby reducing the suction pulsation of the compressor.

[0058] As another implementation, the interior of the heat insulation pipe 400 can also be a stepped hole structure, and the first transition section 423 does not need to be provided at the end of the second pipe section 420 near the first pipe section 410. This is not a limitation.

[0059] For example Figure 4 As shown, in this embodiment, the wall thickness of the heat insulation pipe 400 is T, satisfying the condition that T ≤ 1 mm. This increases the effective flow area of ​​the heat insulation pipe 400, which helps reduce the flow resistance of the refrigerant and increases the refrigerant flow rate within the heat insulation pipe 400, thereby improving the compressor's cooling performance. For example, the diameter of the suction pipe 300 is limited. When T is greater than 1 mm, the wall thickness of the heat insulation pipe 400 is too large, resulting in a smaller pipe diameter. This reduces the effective flow area of ​​the heat insulation pipe 400, increases the flow resistance of the refrigerant, and reduces the compressor's cooling performance. Therefore, by rationally designing the wall thickness of the heat insulation pipe 400, the compressor's cooling performance can be improved while reducing the material cost of the heat insulation pipe 400.

[0060] In this embodiment, the thermal conductivity of the heat insulation tube 400 is λ, which satisfies: λ≤1W / (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.

[0061] For example, the heat insulation pipe 400 uses non-metallic materials, such as fluororubber or PBT plastic. Fluororubber and PBT plastic have higher structural strength, stronger corrosion resistance, and are more durable.

[0062] 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), or 1W / (m·K), and there are no restrictions here.

[0063] 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.

[0064] For example Figure 2 , Figure 4 As shown, 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 can simplify the installation steps of the heat insulation pipe 400, improve the assembly efficiency of the heat insulation pipe 400, and thus improve the production efficiency of the compressor.

[0065] For example, the snap-fit ​​structure includes a snap-fit ​​block 421 disposed on the outer peripheral wall of the second pipe section 420 and an annular groove 301 disposed in the suction pipe 300. The annular groove 301 extends around the axis of the suction pipe 300. Three snap-fit ​​blocks 421 are arranged at intervals around the axis 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 ​​block 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.

[0066] It should be noted that the snap-fit ​​block 421 has a wedge-shaped block structure. The snap-fit ​​block 421 can be configured with one, two or four, etc., which will not be elaborated here.

[0067] It should be noted that the positions of the snap-fit ​​block 421 and the annular groove 301 can be interchanged. That is, the snap-fit ​​block 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 ​​block 421 can also snap onto the side wall of the annular groove 301. No restriction is imposed here.

[0068] 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.

[0069] For example Figure 2 , Figure 4 As shown in this embodiment, the second pipe section 420 is provided with three elastic parts 422 at the end away from the first pipe section 410. The number of elastic parts 422 is equal to the number of snap-fit ​​blocks 421, and the elastic parts 422 correspond one-to-one with the snap-fit ​​blocks 421. Part of the snap-fit ​​block 421 is provided on the corresponding elastic part 422. By providing elastic parts 422, when the heat insulation pipe 400 is installed, the snap-fit ​​block 421 abuts against the inner wall of the air intake pipe 300, and the three elastic parts 422 can contract to reduce the moving resistance of the heat insulation pipe 400, which facilitates the installation of the heat insulation pipe 400.

[0070] For example, when installing the heat insulation pipe 400, the heat insulation pipe 400 is inserted into the suction pipe 300 from the receiving cavity 110. At this time, the snap-fit ​​block abuts against the inner wall of the suction pipe 300. Since the elastic part 422 is elastic, the three elastic parts 422 can contract to reduce the moving resistance of the heat insulation pipe 400. When the snap-fit ​​block 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 ​​block 421 enters the annular groove 301, so that the snap-fit ​​block 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 pipe 400.

[0071] It should be noted that the elastic part 422 can be configured with one, two or four, etc., and there is no limitation here.

[0072] As another implementation, the snap-fit ​​block 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 there is no limitation here.

[0073] For example Figure 2 As shown, 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] In this embodiment, a second transition section 311 is provided at one end of the third pipe section 310 near the fourth pipe section 320. The third pipe section 310 is transitionally connected to the fourth pipe section 320 through the second transition section 311. From the third pipe section 310 to the fourth pipe section 320, the inner diameter of the second transition section 311 gradually increases, which can guide the refrigerant in the suction pipe 300 to flow from the third pipe section 310 to the fourth pipe section 320, so that the flow trajectory of the refrigerant in the suction pipe 300 is more regular, thereby reducing the suction pulsation of the compressor.

[0078] As another implementation, the interior of the inhalation pipe 300 can also be a stepped hole structure, and the second transition section 311 does not need to be provided at the end of the third pipe section 310 near the fourth pipe section 320. This is not a limitation.

[0079] Reference Figures 5 to 7 , Figure 5 This is a cross-sectional view of the compressor according to an embodiment of the present invention from another perspective. Figure 5 The pump body is hidden inside. Figure 6 for Figure 5 A magnified view of part B in the middle section. Figure 7This is a schematic diagram of the assembly of the exhaust muffler 510, the inner exhaust pipe 520, and the outer exhaust pipe 530 according to an embodiment of the present invention. As shown in the figure, in this embodiment, the compressor also includes an exhaust muffler 510, an inner exhaust pipe 520, an outer exhaust pipe 530, and a limiting member 540. The exhaust muffler 510 is connected to the exhaust port of the valve plate. The inner exhaust pipe 520 and the outer exhaust pipe 530 are separate structures. One end of the inner exhaust pipe 520 is connected to the exhaust muffler 510, and the other end of the inner exhaust pipe 520 is provided with a mating part 521. One end of the outer exhaust pipe 530 is provided with a fixing part 531, and the mating part 521 is inserted into the fixing part 531. The end of the outer exhaust pipe 530 away from the inner exhaust pipe 520 extends to the outside of the housing 100. The limiting member 540 is sleeved on the outer periphery of the fixing part 531, and the limiting member 540 is detachably connected to the fixing part 531. The mating part 521 can abut against the limiting member 540 to prevent the mating part 521 from retracting from the fixing part 531. This prevents the inner exhaust pipe 520 from separating from the outer exhaust pipe 530. The traditional connection method of connecting the inner exhaust pipe 520 and the outer exhaust pipe 530 by welding has been changed to a plug-in connection method. Moreover, compared with the welding connection method, the plug-in connection method is easier to install and remove, eliminates the complicated welding process, and reduces production and installation costs. At the same time, it can also solve the problem that the inner exhaust pipe 520 and the outer exhaust pipe 530 cannot be welded together.

[0080] For example, the limiting member 540 includes a connecting cylinder 541 and a limiting step 542 connected to one end of the connecting cylinder 541. The limiting step 542 has a through hole, and the inner exhaust pipe 520 passes through the through hole. The mating part 521 can abut against the limiting step 542 to restrict the separation of the limiting member 540 from the inner exhaust pipe 520. The outer peripheral wall of the fixing part 531 is provided with an external thread structure, and the inner peripheral wall of the connecting cylinder 541 is provided with an internal thread structure. The internal thread structure matches the external thread structure so that the limiting member 540 and the fixing part 531 are threadedly connected. This allows the limiting member 540 and the fixing part 531 to be detachably connected. The operation is simple, convenient and quick, and it is easy to connect and fix the inner exhaust pipe 520 and the outer exhaust pipe 530.

[0081] In another embodiment, the outer peripheral wall of the fixing part 531 is provided with a groove, and the inner peripheral wall of the connecting cylinder 541 is provided with a snap-fit ​​protrusion. The snap-fit ​​protrusion is accommodated in the groove and snaps against the side wall of the groove, which also enables the detachable connection between the limiting member 540 and the fixing part 531. In addition, the positions of the groove and the snap-fit ​​protrusion can be interchanged, that is, the groove is provided on the inner peripheral wall of the connecting cylinder 541, and the snap-fit ​​protrusion is provided on the outer peripheral wall of the fixing part 531. This is not a limitation.

[0082] In another embodiment, the fixing part 531 can be inserted into the mating part 521, and the limiting member 540 can be sleeved on the outer periphery of the mating part 521. The limiting member 540 and the mating part 521 can be detachably connected, which can also prevent the inner exhaust pipe 520 from separating from the outer exhaust pipe 530. This is not a limitation.

[0083] For example Figure 6 As shown, in this embodiment, two sealing elements 550 are sleeved on the outer periphery of the mating part 521. The sealing elements 550 are sealing rings. The two sealing elements 550 are spaced apart along the axial direction of the mating part 521. The inner peripheral surface of the sealing element 550 abuts against the outer peripheral surface of the mating part 521, and the outer peripheral surface of the sealing element 550 abuts against the inner peripheral surface of the fixing part 531. This can prevent refrigerant from leaking from the gap between the mating part 521 and the fixing part 531, thereby improving the sealing effect between the mating part 521 and the fixing part 531 and improving the cooling performance of the compressor.

[0084] It should be noted that the outer peripheral surface of the mating part 521 is provided with two sealing grooves 551. The number of sealing grooves 551 is relative to the number of sealing elements 550. The sealing elements 550 are housed in the corresponding sealing grooves 551, which can improve the stability and reliability of the sealing elements 550 in use.

[0085] It should be noted that the seal 550 can also be configured with one, three or four, etc., without limitation.

[0086] For example Figure 5 , Figure 6 As shown, in this embodiment, the external exhaust pipe 530 includes a fifth pipe section 532 and a sixth pipe section 533. A fixing part 531 is provided at the end of the sixth pipe section 533 away from the fifth pipe section 532. One end of the fifth pipe section 532 is connected to one end of the sixth pipe section 533. The other end of the fifth pipe section 532 extends to the outside of the housing 100. The end of the sixth pipe section 533 away from the fifth pipe section 532 is inserted into the end of the internal exhaust pipe 520 away from the exhaust muffler 510. The minimum inner diameter of the fifth pipe section 532 is D5, and the minimum inner diameter of the sixth pipe section 533 is D6, satisfying that D6 > D5. This increases the effective flow area of ​​the sixth pipe section 533, which helps to reduce the flow resistance of the refrigerant and increase the flow rate of the refrigerant in the external exhaust pipe 530, thereby improving the cooling performance of the compressor.

[0087] For example Figure 7As shown, in this embodiment, the inner exhaust pipe 520 includes a first connecting section 522, a spiral section 523, and a second connecting section 524 connected in sequence. The first connecting section 522 is inserted into the outer exhaust pipe 530 and abuts against the inner wall of the outer exhaust pipe 530. At least a portion of the first connecting section 522 is located outside the outer exhaust pipe 530. A mating part 521 is provided on the first connecting section 522. The spiral section 523 is elastic. The end of the second connecting section 524 away from the spiral section 523 is connected to the exhaust muffler 510. This can reduce the pulsation of refrigerant during exhaust and buffer the vibration generated during compressor operation, effectively reduce exhaust resistance, reduce exhaust pressure loss, and further improve the efficiency of the compressor.

[0088] It is understood that the helical segment 523 has an axis S, and the helical segment 523 extends helically around the axis S. In this embodiment, the axis S forms an angle with the length direction of the exhaust muffler 510, thereby arranging the inner exhaust pipe 520 and the exhaust muffler 510 in an L-shape around the outer periphery of the motor, which is beneficial to optimizing the layout within the housing 100 and improving the space utilization within the housing 100.

[0089] In this embodiment, both the mating part 521 and the inner drain pipe 520 are plastic components. The mating part 521 is connected to the inner drain pipe 520 by heat fusion welding, which can improve the connection reliability and usage stability of the mating part 521 and the inner drain pipe 520.

[0090] In this embodiment, the suction pipe 200 and the exhaust pipe 530 are located on opposite sides of the housing 100 along a first direction. The first direction is a straight line passing through the center of the housing 100 and perpendicular to the piston axis. This increases the distance between the suction pipe 200 and the exhaust pipe 530, preventing heat exchange between the refrigerant drawn in through the suction pipe 200 and the refrigerant discharged through the exhaust pipe 530. This reduces suction overheating and ineffective exhaust heat dissipation, thereby improving the compressor's cooling performance. For example, in a cross-section perpendicular to the crankshaft axis, the outer contour of the housing 100's cross-section is approximately elliptical, with the first direction being the minor axis 610 of the elliptical structure. The suction pipe 200 and the exhaust pipe 530 are positioned on opposite sides of the minor axis 610 of the elliptical structure, increasing the distance between them to reduce suction overheating and ineffective exhaust heat dissipation, thus improving the compressor's cooling performance.

[0091] As another implementation, the first direction can also coincide with the axis of the piston, which is the major axis 620 of the elliptical structure. The intake pipe 200 and the exhaust pipe 530 are respectively placed on both sides of the major axis 620 of the elliptical structure, which can also increase the distance between the intake pipe 200 and the exhaust pipe 530. This is not limited here.

[0092] In this embodiment, the difference between the inner diameter D6 of the sixth pipe section 533 and the outer diameter of the first connecting section 522, and the difference between the inner diameter D6 of the sixth pipe section 533 and the outer diameter of the first connecting section 522, is in the range of 0.3mm to 0.6mm, which is beneficial to reducing the exhaust resistance of the refrigerant.

[0093] It should be noted that the inner diameter tolerance of the sixth pipe section 533 is less than or equal to 0.1 mm, and the cylindricity of the sixth pipe section 533 is less than or equal to 0.1 mm, which can ensure the installation accuracy between the outer pipe 530 and the inner pipe 520.

[0094] A second aspect of this utility model provides a refrigeration device, which includes the compressor described in the above embodiment. The refrigeration device can be a central air conditioning unit, a packaged air conditioner, a split air conditioner, a ducted air conditioner, a window air conditioner, or other similar equipment.

[0095] In the compressor of the first aspect embodiment of this utility model, when the compressor is working, the refrigerant drawn in through the suction pipe 300 sequentially passes through the heat insulation pipe 400, the suction muffler 200, and the suction and discharge mechanism into the cylinder. The stator drives the rotor to rotate the crankshaft. Under the rotational motion 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 other end of the heat insulation pipe 400 extends into the inlet port 210, and the outlet port 401 faces the through-flow... Channel 230 allows refrigerant drawn in from the heat insulation pipe 400 to directly enter the silencer chamber 220. This prevents the refrigerant drawn in from the heat insulation pipe 400 from directly colliding with the wall of the inlet port 210, reduces the overflow of refrigerant drawn in from the suction pipe 300 out of the suction silencer 200, and prevents the refrigerant drawn in from the suction pipe 300 from being heated by the wall of the inlet port 210. This effectively reduces suction overheating, thereby improving the compressor's refrigeration efficiency and performance.

[0096] 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.

[0097] 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. The intake muffler has a muffler cavity, an air inlet, and a channel. The air inlet communicates with the muffler cavity through the channel. 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 is provided, with one end installed inside the suction tube and the other end extending into the air inlet. The outlet of the heat insulation tube faces the channel. The refrigerant drawn in from the suction tube flows into the silencer cavity through the outlet, the air inlet, and the channel in sequence.

2. The compressor according to claim 1, characterized in that: The minimum angle between the axis of the air outlet and the axis of the channel is θ, which satisfies: θ≤15°.

3. 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 second pipe section is inserted into the air intake pipe, and the first pipe section is located in the receiving cavity. The first pipe section and the second pipe section are arranged in a bent manner.

4. The compressor according to claim 3, characterized in that: The minimum diameter of the first pipe segment is D1, and the minimum diameter of the second pipe segment is D2, satisfying the condition: D1 > D2.

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

6. The compressor according to claim 3, characterized in that: The intake tube includes a third tube segment and a fourth tube segment connected in sequence. The end of the fourth tube segment away from the third tube segment is connected to the housing. At least a portion of the first tube segment is installed inside the fourth tube segment. The minimum inner diameter of the third tube segment is D3, and the minimum inner diameter of the fourth tube segment is D4, satisfying that D4 > D3.

7. The compressor according to claim 1, characterized in that: The compressor also includes an exhaust muffler, an inner exhaust pipe, an outer exhaust pipe, and a limiting member. The exhaust muffler is connected to the intake and exhaust mechanism. One end of the inner exhaust pipe is connected to the exhaust port of the exhaust muffler, and the other end of the inner exhaust pipe is provided with a mating part. One end of the outer exhaust pipe extends to the outside of the housing, and the other end of the outer exhaust pipe is provided with a fixing part. The mating part and the fixing part are inserted and connected. The limiting member is provided between the mating part and the fixing part, and the limiting member is used to restrict the mating part from separating from the fixing part.

8. The compressor according to claim 7, characterized in that: The mating part is inserted into the fixing part, and the limiting member is sleeved on the outer periphery of the fixing part and detachably connected to the fixing part. The mating part can abut against the limiting member.

9. The compressor according to claim 8, characterized in that: The limiting member has an internal thread structure, and the outer peripheral wall of the fixing part has an external thread structure that matches the internal thread structure, so that the limiting member and the fixing part are connected by threads; or... One of the inner peripheral wall of the limiting member and the outer peripheral wall of the fixing part is provided with a slot, and the other is provided with a snap-fit ​​protrusion, which snaps into the side wall of the slot.

10. The compressor according to claim 7, characterized in that: At least one sealing element is provided between the mating part and the fixing part.

11. The compressor according to claim 7, characterized in that: The external exhaust pipe includes a fifth pipe section and a sixth pipe section connected in sequence. The fixing part is provided on the sixth pipe section. The minimum inner diameter of the fifth pipe section is D5, and the minimum inner diameter of the sixth pipe section is D6, satisfying that D6 > D5.

12. The compressor according to claim 7, characterized in that: The intake pipe and the exhaust pipe are located on opposite sides of the housing along a first direction, which coincides with the axis of the piston, or the first direction is a straight line passing through the center of the housing and perpendicular to the axis of the piston.

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

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