Rotary compressor and vehicle

Abstract

The utility model provides rotor compressor, including casing, motor assembly and pump body subassembly, and pump body subassembly includes cylinder, first cylinder cover and crankshaft, the side face of first cylinder cover is sealedly connected with first silencer and second silencer respectively near low pressure chamber, first silencer sets up inside second silencer, first cylinder cover is equipped with respectively first silencing chamber and first exhaust hole of cylinder for the intercommunication of first silencer and second exhaust hole for the intercommunication of second silencing chamber and high pressure chamber, first silencer is equipped with third exhaust hole for the intercommunication of first silencing chamber and second silencing chamber, the utility model discloses still provides a kind of vehicle, including preceding rotor compressor, the utility model has advantage in, by setting up double silencer structure on first cylinder cover, effectively increase the volume of silencing chamber to reduce noise, and improve the performance of rotor compressor.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to rotary compressors and vehicles. Background Technology

[0002] In existing electric vehicles, the electric rotary compressor for vehicle air conditioning adopts a high and low back pressure structure. The high-temperature and high-pressure gas obtained by its pump assembly is directly discharged into the housing of the rotary compressor, which can easily cause turbulent airflow of refrigerant inside the housing and generate noise. This is not conducive to the exhaust noise reduction of the rotary compressor and affects the performance of the rotary compressor. Utility Model Content

[0003] To address the aforementioned shortcomings, the purpose of this invention is to provide a rotary compressor that can effectively reduce noise.

[0004] This utility model provides a rotary compressor, including a housing, a motor assembly, and a pump assembly. The pump assembly includes a cylinder, a first cylinder head connected to one side of the cylinder, and a crankshaft. The first cylinder head divides the internal cavity of the housing into a low-pressure chamber and a high-pressure chamber. The motor assembly is disposed in the low-pressure chamber, and the cylinder is disposed in the high-pressure chamber. A first muffler and a second muffler are respectively sealed and connected to the side of the first cylinder head near the low-pressure chamber. The first muffler is disposed inside the second muffler. The first cylinder head is respectively provided with a first exhaust port for connecting the first muffler's first muffler chamber and the cylinder, and a second exhaust port for connecting the second muffler's second muffler chamber and the high-pressure chamber. The first muffler is provided with a third exhaust port for connecting the first muffler chamber and the second muffler chamber. One end of the crankshaft is connected to the rotor of the motor assembly, and the other end passes through the second muffler, the first muffler, and the pump assembly in sequence.

[0005] Preferably, a gap is left between the second silencer and the cavity wall of the low-pressure chamber.

[0006] Preferably, the angle between the first exhaust port and the second exhaust port is 180°.

[0007] Preferably, the angle between the third exhaust port and the second exhaust port is ±90°±20°.

[0008] Preferably, the first cylinder head has a journal at its center for the crankshaft to pass through, the first muffler has a first central hole at its center for the journal to pass through, and the third exhaust port extends outward from the outer periphery of the first central hole and is connected to the first central hole.

[0009] Preferably, the size relationship between the diameter D1 of the first exhaust hole, the diameter D2 of the second exhaust hole, and the diameter D3 of the third exhaust hole is as follows: D1 <D3<D2。

[0010] Preferably, on a plane perpendicular to the axial direction of the crankshaft, the projection of the second exhaust port is located between the outer wall of the cylinder and the cavity wall of the high-pressure chamber.

[0011] Preferably, the housing of the second muffler is provided with an inwardly recessed clearance portion, and the area on the first cylinder head corresponding to the clearance portion is provided with an intake hole.

[0012] Preferably, it further includes an oil-gas separation section, which is provided with an oil-gas separation chamber, an inlet and an outlet. The inlet is used to connect the second exhaust port and the oil-gas separation chamber, and the outlet is used to connect the oil-gas separation chamber and the high-pressure chamber.

[0013] This utility model also provides a vehicle including the aforementioned rotary compressor.

[0014] The advantage of this invention is that by setting a double silencer structure on the first cylinder head, the high-temperature and high-pressure gas obtained by compression by the pump body assembly first enters the first silencer chamber for silence and flow stabilization, and then enters the second silencer chamber for secondary silence and flow stabilization. This effectively increases the volume of the silencer chamber to reduce noise and improves the performance of the rotary compressor. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the rotary compressor of this utility model;

[0016] Figure 2 Schematic diagrams of the first cylinder head from different perspectives;

[0017] Figure 3 This is a schematic diagram of the mating structure of the first muffler, the first cylinder head, and the crankshaft;

[0018] Figure 4 This is a schematic diagram of the assembly structure of the second muffler, the first cylinder head, and the crankshaft.

[0019] Component designation explanation:

[0020] 1. Low-pressure housing

[0021] 11 Air Inlet

[0022] 12 Low-pressure chamber

[0023] 2 High-pressure casing

[0024] 21 Exhaust port

[0025] 22 High-pressure chamber

[0026] 3 Motor assembly

[0027] 4 Pump body assembly

[0028] 41 First Cylinder Head

[0029] 411 Intake port

[0030] 412 Connecting hole

[0031] 413 First exhaust port

[0032] 414 Second exhaust port

[0033] 415 journal

[0034] 5 Crankshaft

[0035] 61 First silencer

[0036] 611 First Silencing Chamber

[0037] 612 Third exhaust port

[0038] 6121 Kong Yi

[0039] 6122 Kong Er

[0040] 62 Second silencer

[0041] 621 Second Silencing Chamber

[0042] 622 Avoidance Section Detailed Implementation

[0043] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0047] Figure 1 The image shown is a cross-sectional view of the rotary compressor of this utility model. In the following description, it will be referred to as... Figure 1 The accompanying diagram serves as a reference for orientation. The direction perpendicular to the view paper and pointing outwards is the forward direction, the direction perpendicular to the view paper and pointing inwards is the backward direction, the direction upwards along the view paper is the upward direction, the direction downwards along the view paper is the downward direction, the direction to the right along the view paper is the right direction, and the direction to the left along the view paper is the left direction.

[0048] like Figure 1 and Figure 2 As shown, this utility model provides a rotary compressor and a vehicle equipped with the rotary compressor. The rotary compressor includes a housing, a motor assembly 3, and a pump assembly 4.

[0049] The pump body assembly 4 includes a cylinder, a first cylinder head 41 connected to the left side of the cylinder, a second cylinder head connected to the right side of the cylinder, and a crankshaft 5. The first cylinder head 41 divides the internal cavity of the housing into a low-pressure chamber 12 and a high-pressure chamber 22. The motor assembly 3 is disposed in the low-pressure chamber 12, and the cylinder is disposed in the high-pressure chamber 22. Preferably, the housing includes a low-pressure housing 1 and a high-pressure housing 2 arranged horizontally from left to right, both of which are hollow internally. The first cylinder head 41 is disposed between the low-pressure housing 1 and the high-pressure housing 2, and its outer periphery is provided with a plurality of connecting holes 412 spaced circumferentially. The plurality of connecting holes 412 are fastened to the low-pressure housing 1 and the high-pressure housing 2 by fasteners. The first cylinder head 41 and the low-pressure housing 1 form the low-pressure chamber 12, and the first cylinder head 41 and the high-pressure housing 2 form the high-pressure chamber 22. The low-pressure chamber 12 is connected to the air inlet 11 for introducing low-temperature, low-pressure refrigerant into the low-pressure chamber 12; the high-pressure chamber 22 is connected to the exhaust port 21 for discharging high-temperature, high-pressure gas obtained by compressing the low-temperature, low-pressure refrigerant through the pump assembly 4.

[0050] like Figure 1-4As shown, a first muffler 61 and a second muffler 62 are respectively sealed and connected to one side of the first cylinder head 41 near the low-pressure chamber 12 (i.e., the left side of the first cylinder head 41). The first muffler 61 is disposed inside the second muffler 62. The inner wall of the first muffler 61 and the left side of the first cylinder head 41 form a first muffler cavity 611, and the inner wall of the second muffler 62, the outer wall of the first muffler 61, and the left side of the first cylinder head 41 form a second muffler cavity 621. Specifically, both the first muffler 61 and the second muffler 62 are fixed to the first cylinder head 41 by bolts, so that the edges of the first muffler 61 and the edges of the second muffler 62 are tightly abutted against the left side of the first cylinder head 41, achieving a gapless fit and eliminating the possibility of oil or gas flowing through gaps. Preferably, a gap is left between the second silencer 62 and the cavity wall of the low-pressure chamber 12, that is, the outer diameter of the second silencer 62 is smaller than the inner diameter of the low-pressure housing 1. This arrangement makes the outer diameter of the second silencer 62 not limited by the size of the pump body assembly 4, which helps to increase the total volume of the silencing chambers of the first silencer 61 and the second silencer 62 and improve the silencing performance of the silencers.

[0051] The first cylinder head 41 is provided with a first exhaust port 413 for connecting the first muffler chamber 611 and the cylinder, and a second exhaust port 414 for connecting the second muffler chamber 621 and the high-pressure chamber 22. The first muffler 61 is provided with a third exhaust port 612 for connecting the first muffler chamber 611 and the second muffler chamber 621. One end of the crankshaft 5 is connected to the rotor of the motor assembly 3, and the other end passes through the second muffler 62, the first muffler 61 and the pump body assembly 4 from left to right, and is connected to the piston located in the cylinder. The piston rotates synchronously with the crankshaft 5 to compress the refrigerant.

[0052] Compared to the existing single-muffler structure and the technical solution of setting both the first exhaust port and the second exhaust port on the first cylinder head in the muffler cavity of the single muffler, this utility model sets a double muffler structure on the first cylinder head 41. The first exhaust port 413 and the second exhaust port 414 are separated by the first muffler 61. The first exhaust port 413 is set in the first muffler 61 and the second exhaust port 414 is set in the second muffler 62. The high-temperature and high-pressure gas obtained by the pump body assembly 4 first enters the first muffler cavity 611 through the first exhaust port 413 for muffler and flow stabilization. Then it enters the second muffler cavity 621 through the third exhaust port 612 for secondary muffler and flow stabilization. Finally, it enters the high-pressure cavity 22 and the exhaust port 21 through the second exhaust port 414. This effectively increases the volume of the muffler cavity to reduce noise and improves the performance of the rotary compressor.

[0053] like Figure 1As shown in the figure, a journal 415 for the crankshaft 5 to pass through is provided at the center of the first cylinder head 41, a first central hole for the journal 415 to pass through is provided at the center of the first muffler 61, and a second central hole for the journal 415 to pass through is provided at the center of the second muffler 62. The journal 415 is in clearance-free fit with the first central hole and the second central hole.

[0054] As Figure 2 shown, the included angle between the first exhaust hole 413 and the second exhaust hole 414 is 180°. The first exhaust hole 413 is arranged on the lower side of the journal 415, and the second exhaust hole 414 is arranged on the upper side of the journal 415.

[0055] The third exhaust hole 612 has a plurality of arrangement forms. In one embodiment of the third exhaust hole 612, as Figure 2 and Figure 3 shown, along the circumferential direction of the first central hole, the third exhaust holes 612 are arranged at intervals between the first exhaust hole 413 and the second exhaust hole 414. Specifically, the included angle between the third exhaust hole 612 and the second exhaust hole 414 is ±90°±20°, and the included angle between the third exhaust hole 612 and the first exhaust hole 413 is also ±90°±20°. That is, the third exhaust hole 612 may be a first hole 6121 located at the rear upper side of the first central hole, or may be a second hole 6122 located at the front lower side of the first central hole. This arrangement enables high-temperature and high-pressure gas to be fully muffled in the first muffling chamber 611 and the second muffling chamber 621.

[0056] In another embodiment of the third exhaust hole 612, the third exhaust hole 612 extends outward from the outer periphery of the first central hole and communicates with the first central hole. That is, when machining the first muffler 61, a notch can be machined on the outer periphery of the first central hole to serve as the third exhaust hole 612.

[0057] Further, the magnitude relationship among the pore diameter D1 of the first exhaust hole 413, the pore diameter D2 of the second exhaust hole 414 and the pore diameter D3 of the third exhaust hole 612 is: D1<D3<D2. This arrangement helps reduce exhaust resistance after muffling in the muffling chambers.

[0058] As Figure 4 shown, an avoidance portion 622 recessed inward along the radial direction of the second muffler 62 is provided on the outer shell of the second muffler 62, and an air suction hole 411 is provided in a region corresponding to the avoidance portion 622 on the first cylinder head 411. The air suction hole 411 is configured to communicate the low-pressure chamber 12 with the cylinder. Low-temperature and low-pressure refrigerant entering the low-pressure chamber 12 through the air inlet 11 can enter the cylinder through the air suction hole 411, and is compressed into high-temperature and high-pressure gas by the pump body assembly 4.

[0059] As Figure 1 and Figure 2As shown, on a plane perpendicular to the axial direction (i.e., the left-right direction) of the crankshaft 5, the projection of the second exhaust port 414 is located between the outer wall of the cylinder and the cavity wall of the high-pressure chamber 22, so the second exhaust port 414 can connect the second muffler chamber 621 and the high-pressure chamber 22.

[0060] Furthermore, the rotary compressor of this invention also includes an oil-gas separation section connected to the first cylinder head 41. The oil-gas separation section has an oil-gas separation chamber, an inlet, and an outlet. The inlet connects the second exhaust port 414 to the oil-gas separation chamber, and the outlet connects the oil-gas separation chamber to the high-pressure chamber 22. The oil-gas separation section separates the high-temperature, high-pressure gas discharged from the second exhaust port 414 from the lubricating oil, reducing the oil discharge rate of the rotary compressor and preventing lubricating oil from entering the air conditioning system and affecting refrigeration.

[0061] The high-temperature and high-pressure gas obtained by the pump body assembly 4 enters the first silencer chamber 611 through the first exhaust port 413 for silencing, and then enters the second silencer chamber 621 through the third exhaust port 612 for secondary silencing. Then, it enters the oil-gas separation chamber through the second exhaust port 414 and the inlet. The oil-gas separation chamber separates the high-temperature and high-pressure gas and the lubricating oil. The high-temperature and high-pressure gas will be discharged to the high-pressure chamber 22 through the outlet, and finally discharged to the air conditioning system through the exhaust port 21.

[0062] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A rotary compressor, characterized in that, The device includes a housing, a motor assembly (3), and a pump assembly (4). The pump assembly (4) includes a cylinder, a first cylinder head (41) connected to one side of the cylinder, and a crankshaft (5). The first cylinder head (41) divides the internal cavity of the housing into a low-pressure chamber (12) and a high-pressure chamber (22). The motor assembly (3) is disposed in the low-pressure chamber (12), and the cylinder is disposed in the high-pressure chamber (22). A first muffler (61) and a second muffler (62) are respectively sealed and connected on the side of the first cylinder head (41) near the low-pressure chamber (12), and the first muffler (61) is disposed inside the second muffler (62); The first cylinder head (41) is provided with a first muffler cavity (611) for connecting the first muffler (61) and the first exhaust port (413) of the cylinder, and a second exhaust port (414) for connecting the second muffler cavity (621) of the second muffler (62) and the high pressure chamber (22). The first muffler (61) is provided with a third exhaust port (612) for connecting the first muffler cavity (611) and the second muffler cavity (621). One end of the crankshaft (5) is connected to the rotor of the motor assembly (3), and the other end passes through the second muffler (62), the first muffler (61) and the pump body assembly (4) in sequence.

2. The rotary compressor according to claim 1, characterized in that, There is a gap between the second silencer (62) and the cavity wall of the low-pressure chamber (12).

3. The rotary compressor according to claim 1, characterized in that, The angle between the first exhaust port (413) and the second exhaust port (414) is 180°.

4. The rotary compressor according to claim 3, characterized in that, The angle between the third exhaust port (612) and the second exhaust port (414) is ±90°±20°.

5. The rotary compressor according to claim 3, characterized in that, The first cylinder head (41) has a journal (415) at its center for the crankshaft (5) to pass through, and the first muffler (61) has a first central hole at its center for the journal (415) to pass through. The third exhaust port (612) extends outward from the outer periphery of the first central hole and is connected to the first central hole.

6. The rotary compressor according to claim 1, characterized in that, The size relationship between the diameter D1 of the first vent (413), the diameter D2 of the second vent (414), and the diameter D3 of the third vent (612) is as follows: D1 <D3<D2。 7. The rotary compressor according to claim 1, characterized in that, On a plane perpendicular to the axial direction of the crankshaft (5), the projection of the second exhaust port (414) is located between the outer wall of the cylinder and the cavity wall of the high-pressure chamber (22).

8. The rotary compressor according to claim 1, characterized in that, The second muffler (62) has an inwardly recessed clearance portion (622) on its outer shell, and the first cylinder head (41) has an intake hole (411) in the area corresponding to the clearance portion (622).

9. The rotary compressor according to claim 1, characterized in that, It also includes an oil-gas separation section, which is provided with an oil-gas separation chamber, an inlet and an outlet. The inlet is used to connect the second exhaust port (414) and the oil-gas separation chamber, and the outlet is used to connect the oil-gas separation chamber and the high-pressure chamber (22).

10. A vehicle, characterized in that, Including the rotary compressor as described in any one of claims 1-9.

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