A rotary compressor and a vehicle

Abstract

The utility model provides a kind of rotor compressor, including shell, motor assembly and pump body component, pump body component includes cylinder, first cylinder cover and crankshaft;First cylinder cover includes main part and boss part connected with each other, it further includes the central through-hole simultaneously through main part and boss part;Main part separates the inside cavity of shell into low pressure chamber and high pressure chamber, motor assembly is arranged in low pressure chamber, cylinder is arranged in high pressure chamber, and the bottom of high pressure chamber is equipped with oil pool;Boss part is arranged in high pressure chamber, and its bottom is provided with oil suction passage, and oil suction passage is used to connect oil pool and central through-hole.The utility model further provides a kind of vehicle, including aforementioned rotor compressor.The utility model has the beneficial effect that by setting boss part and oil suction passage on first cylinder cover, the structural strength of the region where oil suction passage is located can be ensured, and the passage of lubricating oil into pump body component can be increased, to ensure the sufficient lubrication of each friction pair in pump body component.

Description

Technical Field

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

[0002] Automotive electric rotary compressors employ a high-low back pressure structure, meaning that axially extending oil holes are installed in the crankshaft. The pressure difference between the high-pressure and low-pressure sides of the rotary compressor allows lubricating oil to flow along these holes to each friction pair, achieving lubrication and heat dissipation. However, vehicle movement causes bumps and vibrations, making the flow of lubricating oil inside the rotary compressor unstable. Relying solely on the centrifugal force generated by the crankshaft rotation to carry oil from the oil holes into the compressor cannot guarantee sufficient lubrication of the friction pairs, ultimately affecting the reliability of the rotary compressor. Utility Model Content

[0003] To address the aforementioned deficiencies, the present invention aims to provide a rotary compressor that achieves lubrication of the friction pairs in the pump body assembly by adding an oil suction channel on the first cylinder head to connect the oil sump and the central through hole.

[0004] This utility model provides a rotary compressor, including a housing, a motor assembly, and a pump body assembly. The pump body assembly includes a cylinder, a first cylinder head connected to one side of the cylinder, and a crankshaft. The first cylinder head includes a main body portion and a boss portion connected to each other, and also includes a central through hole that passes through both the main body portion and the boss portion. One end of the crankshaft is connected to the rotor of the motor assembly, and the other end passes through the central through hole and the cylinder in sequence. The main body portion 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. An oil sump is provided at the bottom of the high-pressure chamber. The boss portion is disposed in the high-pressure chamber, and an oil suction channel is provided at its bottom. The oil suction channel is used to connect the oil sump and the central through hole.

[0005] Preferably, the diameter of the oil suction channel is 2mm to 5mm.

[0006] Preferably, the cylinder has a sliding vane groove on its side wall, and the angle between the oil suction channel and the sliding vane groove is -20° to 20°.

[0007] Preferably, the center of the boss portion is further provided with an annular groove that is coaxially arranged with and communicates with the central through hole, and the oil suction channel connects the oil pool and the annular groove.

[0008] Preferably, the first cylinder head is further provided with an air intake channel that passes through both the main body and the boss, and the air intake channel is used to connect the low-pressure chamber and the cylinder.

[0009] Preferably, the air intake channel is inclined, with its inlet height being lower than its outlet height.

[0010] Preferably, a first muffler is also connected to the main body, and the inlet of the air intake channel is located outside the first muffler.

[0011] Preferably, the air intake channel and / or oil intake channel are provided with a filter element.

[0012] Preferably, the high-pressure chamber further includes an oil storage chamber connected to the oil tank. The oil storage chamber is located corresponding to the oil suction channel, and its diameter gradually decreases from the side closer to the main body to the side farther away from the main body.

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

[0014] The advantage of this invention lies in that by providing a boss on the first cylinder head and opening an oil suction channel at the bottom of the boss, the structural strength of the area where the oil suction channel is located can be guaranteed, and the channels for lubricating oil to enter the pump body assembly can be increased, ensuring sufficient lubrication of the friction pairs in the pump body assembly and improving the performance of the rotary compressor. This oil suction channel has a simple structure, is easy to manufacture, and can reduce the production cost of the product. Attached Figure Description

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

[0016] Figure 2 Three-dimensional views of the first cylinder head from different perspectives;

[0017] Figure 3 (a) and 3(b) are cross-sectional views of the first cylinder head along different directions;

[0018] Figure 4 This is a right view of the first cylinder head;

[0019] Figure 5 This is a schematic diagram of the oil circuit of the rotary compressor of this utility model.

[0020] Component designation explanation:

[0021] 1. Low-pressure housing

[0022] 11 Low-pressure chamber

[0023] 2 High-pressure casing

[0024] 21 High-pressure chamber

[0025] 211 Oil reservoir

[0026] 22 bevel

[0027] 3 Motor assembly

[0028] 4 Pump body assembly

[0029] 5 Crankshaft

[0030] 51 Shaft Hole

[0031] 61 First silencer

[0032] 62 Second silencer

[0033] 7 First Cylinder Head

[0034] 71 Main Body

[0035] 711 First connecting hole

[0036] 72. Bossed section

[0037] 721 Annular groove

[0038] 722 Second connecting hole

[0039] 723 sector area

[0040] 72a Sliding groove corresponding area

[0041] 73 Inhalation Channel

[0042] 731 Entrance

[0043] 732 Export

[0044] 74 journals

[0045] 75 Center Through Hole

[0046] 76 Oil suction channels

[0047] 761 Oil Suction Port

[0048] 8 Oil tank Detailed Implementation

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0053] 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.

[0054] like Figure 1-5 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. The pump assembly 4 includes a cylinder, a first cylinder head 7 connected to the left side of the cylinder, a second cylinder head connected to the right side of the cylinder, and a crankshaft 5.

[0055] The first cylinder head 7 includes a main body 71 and a boss 72 connected to each other, and a central through hole 75 passing through both the main body 71 and the boss 72. One end of the crankshaft 5 is connected to the rotor of the motor assembly 3, and the other end passes through the central through hole 75, the cylinder, and the second cylinder head in sequence. The crankshaft 5 is used to drive the piston of the cylinder to rotate eccentrically. The side wall of the cylinder is provided with a vane groove and a spring groove communicating with the vane groove. A vane is provided in the vane groove, the upper end of the vane abuts against the outer periphery of the piston, and the lower end is connected to a spring provided in the spring groove. The first cylinder head 7 and the second cylinder head cooperate with each other to support the crankshaft 5 and seal the compression chamber of the cylinder to ensure the normal operation of the pump body assembly 4.

[0056] The main body 71 divides the internal cavity of the housing into a low-pressure chamber 11 and a high-pressure chamber 21. The motor assembly 3 is disposed in the low-pressure chamber 11, and the cylinder is disposed in the high-pressure chamber 21. An oil sump 8 is provided at the bottom of the high-pressure chamber 21. 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 main body 71 is disposed between the low-pressure housing 1 and the high-pressure housing 2, and its outer periphery is provided with a plurality of first connecting holes 711 spaced circumferentially. The plurality of first connecting holes 711 are fastened to the low-pressure housing 1 and the high-pressure housing 2 by fasteners. The main body 71 and the low-pressure housing 1 form the low-pressure chamber 11, and the main body 71 and the high-pressure housing 2 form the high-pressure chamber 21. The low-pressure chamber 11 is connected to an air inlet for introducing low-temperature, low-pressure refrigerant into the low-pressure chamber 11; the high-pressure chamber 21 is connected to an exhaust port for discharging high-temperature, high-pressure gas obtained by compressing the low-temperature, low-pressure refrigerant by the pump assembly 4. A journal 74 is provided on the left side of the main body 71, and a central through hole 75 passes through the journal 74. A first muffler 61 is also sealed and connected to the left side of the main body 71, and a second muffler 62 is sealed and connected to the right side of the second cylinder head. A sealed space is formed between the second cylinder head and the second muffler 62, which is not connected to the high-pressure chamber 21. A shaft hole 51 is also provided in the crankshaft 5, which is used to connect the low-pressure chamber 11 and the sealed space.

[0057] The boss portion 72 is provided with a high-pressure chamber 21, and an oil suction channel 76 is provided at its bottom. The oil suction channel 76 is used to connect the oil tank 8 and the central through hole 75.

[0058] Combination Figure 5 As can be seen, when the motor assembly 3 is working, it drives the piston to rotate eccentrically inside the cylinder via the crankshaft 5, compressing the low-temperature, low-pressure refrigerant entering the cylinder. Due to the pressure difference between the high-pressure chamber 21 and the low-pressure chamber 11, the lubricating oil in the oil sump 8 enters the central through hole 75 through the oil suction channel 76 to lubricate the friction pairs in the pump body assembly 4, ensuring the reliability of the rotor compressor during operation.

[0059] like Figure 1 and Figure 4As shown, the outer periphery of the boss portion 72 is provided with a plurality of second connecting holes 722 spaced circumferentially. The plurality of second connecting holes 722 are fastened to the left side of the cylinder by fasteners to achieve a sealed connection between the boss portion 72 and the left side of the cylinder. The sliding groove corresponding area 72a shown in the dashed box is the part of the boss portion 72 used to seal the sliding groove, which can prevent refrigerant from leaking from the high-pressure chamber 21 to the low-pressure chamber 11 through the gap between the two.

[0060] This invention provides a boss 72 on the first cylinder head 7, which increases the thickness of the area where the boss 72 is located compared to the main body 71. This design facilitates the machining of the oil suction channel 76; ensures a certain distance between the oil suction channel 76 and the low-pressure chamber 11, thereby increasing the structural strength of the area where the oil suction channel 76 is located in the first cylinder head 7; and allows the boss 72 to seal the cylinder vane groove, thus ensuring the reliability of the vane movement.

[0061] Furthermore, such as Figure 4 As shown, to ensure the oil suction effect of the oil suction channel 76, the included angle between the oil suction channel 76 and the cylinder's vane groove (corresponding area 72a) is -20° to 20°. When the included angle is 0°, the projection of the oil suction channel 76 coincides with the projection of the vane groove on a plane perpendicular to the crankshaft 5 axis, and the oil suction channel 76 is located directly below the central through hole 75. Preferably, the diameter of the oil suction channel 76 is 2mm to 5mm.

[0062] like Figure 2 and Figure 3 As shown, an annular groove 721 is provided at the center of the boss 72, which is coaxially arranged with and interconnected with the central through hole 75. The oil suction channel 76 connects the oil pool 8 and the annular groove 721.

[0063] like Figure 1 As shown, a slope 22 is provided on the inner wall of the high-pressure housing 21 near the first cylinder head 7. An oil reservoir 211 is formed between the slope 22 and the first cylinder head 7. This oil reservoir 211 is part of the high-pressure housing 21 and is connected to the oil sump 8. It is located corresponding to the oil suction channel 76, and its diameter gradually decreases from the side closer to the main body 71 to the side farther away from the main body 71. The oil reservoir 211 helps to collect the lubricating oil in the oil sump 8, facilitating the intake of lubricating oil by the oil suction channel 76.

[0064] In one embodiment of this utility model, such as Figure 1-3As shown in (a), the first cylinder head 7 also has an intake channel 73 that passes through both the main body 71 and the boss 72. The intake channel 73 connects the low-pressure chamber 11 and the cylinder, introducing the low-temperature, low-pressure refrigerant from the low-pressure chamber 12 into the cylinder. Preferably, the intake channel 73 is inclined, with its inlet 731 at a height less than its outlet 732, and the inlet 731 is located outside the first muffler 61, meaning the intake channel 73 is not connected to the muffler chamber of the first muffler 61. Therefore, the inclined intake channel 73 serves two purposes: first, to allow the inlet 731 to avoid the first muffler 61; and second, to facilitate the introduction of lubricating oil mixed with the refrigerant into the low-pressure chamber 11, improving the reliability of the moving friction pair. Furthermore, the intake channel 76 can seamlessly penetrate the entire first cylinder head 7, thus eliminating the need for a sealing design.

[0065] like Figure 2 , Figure 3 (b) and Figure 4 As shown, the bottom of the outer periphery of the boss 72 extends outward to form a fan-shaped area 723. Both the oil suction channel 76 and the air suction channel 73 are opened in the fan-shaped area 723. The oil suction port 761 of the oil suction channel 76 is opened on the lower surface of the fan-shaped area 723, and the outlet 732 of the air suction channel 73 is opened on the right side of the fan-shaped area 723.

[0066] Furthermore, to prevent impurities from entering the pump body assembly 4, filters are provided in the suction channel 73 and / or the oil suction channel 76. Specifically, the filters are filter screens, which can filter impurities in the oil-containing refrigerant and impurities in the oil sump 8, increasing the reliability of the rotary compressor.

[0067] 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, It includes a housing, a motor assembly (3) and a pump body assembly (4), the pump body assembly (4) including a cylinder, a first cylinder head (7) connected to one side of the cylinder, and a crankshaft (5); The first cylinder head (7) includes a main body (71) and a boss (72) connected to each other, and also includes a central through hole (75) that passes through both the main body (71) and the boss (72). One end of the crankshaft (5) is connected to the rotor of the motor assembly (3), and the other end passes through the central through hole (75) and the cylinder in sequence. The main body (71) divides the internal cavity of the housing into a low-pressure chamber (11) and a high-pressure chamber (21). The motor assembly (3) is disposed in the low-pressure chamber (11), the cylinder is disposed in the high-pressure chamber (21), and an oil sump (8) is provided at the bottom of the high-pressure chamber (21). The boss (72) is located in the high-pressure chamber (21), and an oil suction channel (76) is provided at its bottom. The oil suction channel (76) is used to connect the oil tank (8) and the central through hole (75).

2. The rotary compressor according to claim 1, characterized in that, The diameter of the oil suction channel (76) is 2 mm to 5 mm.

3. The rotary compressor according to claim 1, characterized in that, The cylinder has a sliding vane groove on its side wall, and the angle between the oil suction channel (76) and the sliding vane groove is -20° to 20°.

4. The rotary compressor according to claim 1, characterized in that, The center of the boss (72) is also provided with an annular groove (721) that is coaxially arranged with and interconnected with the central through hole (75), and the oil suction channel (76) connects the oil pool (8) and the annular groove (721).

5. The rotary compressor according to claim 1, characterized in that, The first cylinder head (7) is also provided with an air intake channel (73) that passes through both the main body (71) and the boss (72). The air intake channel (73) is used to connect the low-pressure chamber (11) and the cylinder.

6. The rotary compressor according to claim 5, characterized in that, The air intake channel (73) is inclined, and the height of its inlet (731) is less than the height of its outlet (732).

7. The rotary compressor according to claim 5, characterized in that, The main body (71) is also connected to a first silencer (6), and the inlet (731) of the air intake channel (73) is located outside the first silencer (6).

8. The rotary compressor according to claim 5, characterized in that, The air intake channel (73) and / or oil intake channel (76) are provided with filters.

9. The rotary compressor according to claim 1, characterized in that, The high-pressure chamber (21) also includes an oil storage chamber (211) connected to the oil tank (8). The oil storage chamber (211) is located at a position corresponding to the oil suction channel (76), and its diameter gradually decreases from the side closer to the main body (71) to the side farther away from the main body (71).

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

Images