Pump body assembly, compressor and air conditioner

Abstract

The present application provides a pump body assembly, a compressor, and an air conditioner. The pump body assembly includes a crankshaft (1), a low-pressure cylinder (2), a high-pressure cylinder (3), an upper flange (4), and a flange cover plate (5). A first intermediate-pressure chamber (6) communicating with the exhaust port of the low-pressure cylinder (2) is provided at the top of the upper flange (4). The flange cover plate (5) covers the upper end surface of the upper flange (4) and closes the first intermediate-pressure chamber (6). The upper flange (4) has a relief groove at the connection position between the flange journal (8) and the upper end surface. The flange cover plate (5) and the relief groove cooperate to form an oil storage chamber (7). A flange oil hole (9) is provided on the flange journal (8), and a main oil hole (10) is provided on the crankshaft (1). The main oil hole (10) communicates with the oil storage chamber (7) through the flange oil hole (9). According to the pump body assembly of the present application, it can effectively prevent high-pressure refrigerant from leaking into the intermediate-pressure chamber, reduce the power consumption of the compressor, and improve the performance of the compressor.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and particularly relates to a pump body assembly, a compressor and an air conditioner. Background Art

[0002] The two-stage boosting compressor can effectively solve the problems commonly existing in ordinary household air conditioners and heat pump water heaters, such as poor low-temperature heating effect, slow high-temperature refrigeration and low energy efficiency. Compared with the conventional two-stage compressor pump body structure with the low-pressure cylinder placed at the bottom, a two-stage boosting compressor with the low-pressure cylinder placed at the top is disclosed in the related art. In this type of compressor, the middle-pressure cavity above the low-pressure cylinder is composed of a flange and a flange cover plate. The flange and the flange cover plate are locked by screws, which will cause a gap between the flange and the flange cover plate. The high-pressure refrigerant in the housing will leak into the middle-pressure cavity through this gap, affecting the performance of the compressor. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present application is to provide a pump body assembly, a compressor and an air conditioner, which can effectively prevent the high-pressure refrigerant from leaking into the middle-pressure cavity, reduce the power consumption of the compressor, and improve the performance of the compressor.

[0004] To solve the above problems, the present application provides a pump body assembly, including a crankshaft, a low-pressure cylinder, a high-pressure cylinder, an upper flange and a flange cover plate. The top of the upper flange is provided with a first middle-pressure cavity communicating with the exhaust port of the low-pressure cylinder. The flange cover plate covers the upper end surface of the upper flange and closes the first middle-pressure cavity. The upper flange has a relief groove at the connection position of the flange journal and the upper end surface. The flange cover plate and the relief groove cooperate to form an oil storage cavity. A flange oil hole is provided on the flange journal, and a main oil hole is provided on the crankshaft. The main oil hole communicates with the oil storage cavity through the flange oil hole.

[0005] Preferably, the inner edge of the lower end surface of the flange cover plate is located radially inside the outer edge of the relief groove.

[0006] Preferably, the flange cover plate is provided with an oil passage extending radially. The oil passage penetrates through the flange cover plate and communicates with the oil storage cavity. The oil passage is located above the bottom surface of the flange cover plate and is isolated from the first middle-pressure cavity.

[0007] Preferably, the oil passage is a radial oil hole, and the radial oil hole is arranged axially along the crankshaft corresponding to the flange oil hole.

[0008] Preferably, the oil passage is a radial oil groove, and the radial oil groove is arranged on the upper end surface of the flange cover plate. An annular sinking groove is also arranged on the inner peripheral side of the upper end surface of the flange cover plate, and the radial oil groove communicates with the sinking groove.

[0009] Preferably, the part of the flange cover plate above the flange oil hole is matched with the flange journal, and the part of the flange cover plate below the flange oil hole is provided with a flow-through passage. The flange oil hole communicates with the oil storage cavity through the flow-through passage.

[0010] Preferably, a lateral oil hole is provided on the crankshaft. The lateral oil hole is at the same height as the flange oil hole along the axial direction of the crankshaft, and the lateral oil hole can communicate the flange oil hole and the main oil hole.

[0011] Preferably, the lateral oil hole is a pressure relief oil hole. An annular oil groove is provided on the outer peripheral wall of the crankshaft. The lateral oil hole is located in the area where the annular oil groove is located and communicates with the annular oil groove.

[0012] Preferably, the pump body assembly further includes a first partition plate, a second partition plate and a lower flange. The first partition plate and the second partition plate are located between the low-pressure cylinder and the high-pressure cylinder. The lower flange is located on the lower side of the high-pressure cylinder. A second medium-pressure chamber is formed between the first partition plate and the second partition plate, and the second medium-pressure chamber communicates with the exhaust port of the low-pressure cylinder.

[0013] According to another aspect of the present application, a compressor is provided, including a pump body assembly, and the pump body assembly is the above-mentioned pump body assembly.

[0014] According to another aspect of the present application, an air conditioner is provided, including the above-mentioned pump body assembly or the above-mentioned compressor.

[0015] The pump body assembly provided by the present application includes a crankshaft, a low-pressure cylinder, a high-pressure cylinder, an upper flange and a flange cover plate. A first medium-pressure chamber communicating with the exhaust port of the low-pressure cylinder is provided at the top of the upper flange. The flange cover plate covers the upper end surface of the upper flange and closes the first medium-pressure chamber. The upper flange has a tool withdrawal groove at the connection position between the flange journal and the upper end surface. The flange cover plate and the tool withdrawal groove cooperate to form an oil storage chamber. A flange oil hole is provided on the flange journal, and a main oil hole is provided on the crankshaft. The main oil hole communicates with the oil storage chamber through the flange oil hole. This pump body assembly uses the tool withdrawal groove and the flange cover plate to cooperate to form an oil storage chamber, and makes the oil storage chamber located below the mating clearance between the flange cover plate and the upper flange. After the refrigeration oil in the main oil hole enters the oil storage chamber through the flange oil hole, the oil level height of the refrigeration oil gradually rises. When the oil level height of the refrigeration oil exceeds the contact surface between the flange cover plate and the upper flange, the refrigeration oil enters the contact surface clearance and seals it, so that the contact surface between the upper flange and the flange cover plate of the middle-pressure chamber component above the low-pressure cylinder is sealed by an oil film. The high-pressure refrigerant in the shell cannot leak into the first medium-pressure chamber, and the intermediate pressure in the first medium-pressure chamber is always the optimal intermediate pressure, reducing the power consumption of the compressor, making the compressor always operate in the optimal state, and improving the working performance of the compressor. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the pump body assembly according to an embodiment of the present application;

[0017] Figure 2 is a schematic diagram of the refrigerant flow direction of the pump body assembly according to an embodiment of the present application;

[0018] Figure 3 Schematic diagram of the flow direction of the refrigeration oil of the pump body assembly according to an embodiment of the present application;

[0019] Figure 4 is Figure 3 Enlarged structural schematic diagram at position A of;

[0020] Figure 5 Exploded structure diagram of the upper flange and the flange cover plate of the pump body assembly according to an embodiment of the present application;

[0021] Figure 6 Structural schematic diagram of the flange cover plate of the pump body assembly according to an embodiment of the present application;

[0022] Figure 7 Structural schematic diagram of the flange cover plate of the pump body assembly according to an embodiment of the present application;

[0023] Figure 8 Position comparison diagram of the crankshaft pressure relief oil hole between the related art and the embodiment of the present application.

[0024] The reference numerals are shown as:

[0025] 1, crankshaft; 2, low-pressure cylinder; 3, high-pressure cylinder; 4, upper flange; 5, flange cover plate; 6, first intermediate pressure chamber; 7, oil storage chamber; 8, flange journal; 9, flange oil hole; 10, main oil hole; 11, oil passage; 12, overflow passage; 13, lateral oil hole; 14, annular oil groove; 15, first partition; 16, second partition; 17, lower flange; 18, second intermediate pressure chamber. Detailed implementation manners

[0026] Referring to Figures 1 to 8 As shown, according to the embodiment of the present application, the pump body assembly includes a crankshaft 1, a low-pressure cylinder 2, a high-pressure cylinder 3, an upper flange 4 and a flange cover plate 5. A first intermediate pressure chamber 6 communicating with the exhaust port of the low-pressure cylinder 2 is opened at the top of the upper flange 4. The flange cover plate 5 covers the upper end surface of the upper flange 4 and closes the first intermediate pressure chamber 6. The upper flange 4 has a tool withdrawal groove at the connection position of the flange journal 8 and the upper end surface. The flange cover plate 5 and the tool withdrawal groove cooperate to form an oil storage chamber 7. A flange oil hole 9 is provided on the flange journal 8, and a main oil hole 10 is provided on the crankshaft 1. The main oil hole 10 communicates with the oil storage chamber 7 through the flange oil hole 9.

[0027] The pump body assembly forms an oil storage cavity 7 by using a relief groove in cooperation with a flange cover plate 5, and the oil storage cavity 7 is located below the mating clearance between the flange cover plate 5 and the upper flange 4. When the refrigerant oil in the main oil hole 10 enters the oil storage cavity 7 through the flange oil hole 9, the oil level of the refrigerant oil gradually rises. When the oil level of the refrigerant oil exceeds the contact surface between the flange cover plate 5 and the upper flange 4, the refrigerant oil enters the contact surface clearance and seals it, so that the contact surface between the upper flange 4 and the flange cover plate 5 of the middle pressure cavity component above the low-pressure cylinder 2 is sealed by an oil film. The high-pressure refrigerant in the shell cannot leak into the first middle pressure cavity 6, and the intermediate pressure in the first middle pressure cavity 6 is always the optimal intermediate pressure, reducing the power consumption of the compressor and enabling the compressor to always operate in the optimal state, improving the working performance of the compressor.

[0028] In one embodiment, the inner edge of the lower end face of the flange cover plate 5 is located radially inside the outer edge of the relief groove. In this embodiment, when the oil level of the refrigerant oil in the oil storage cavity 7 reaches the contact surface between the flange cover plate 5 and the upper flange 4, since a part of the lower end face of the flange cover plate 5 is located above the oil storage cavity 7, the refrigerant oil can be guided to a certain extent, so that the refrigerant oil can more easily enter the contact surface between the upper flange 4 and the flange cover plate 5 under the blocking action of the flange cover plate 5 to form an oil film.

[0029] In one embodiment, an oil passage 11 extending radially is provided on the flange cover plate 5. The oil passage 11 penetrates the flange cover plate 5 and communicates with the oil storage cavity 7. The oil passage 11 is located above the bottom surface of the flange cover plate 5 and is isolated from the first middle pressure cavity 6. In this embodiment, by providing the oil passage 11, when the oil level in the oil storage cavity 7 exceeds the lowest height of the oil passage 11 on the flange cover plate 5, the refrigerant oil can flow out along the oil passage 11 and then flow into the oil sump along the pump body to realize oil circulation.

[0030] In this embodiment, the upper flange 4 and the flange cover plate 5 are fixed by screws on the outer peripheral side of the first middle pressure cavity 6, and at the same time, the sealing between the upper flange 4 and the flange cover plate 5 on the outer peripheral side of the first middle pressure cavity 6 is realized by the locking force of the screws. To ensure the sealing performance, the upper end face of the upper flange 4 and the lower end face of the flange cover plate 5 are both precision machined surfaces.

[0031] In one embodiment, the oil passage 11 is a radial oil hole, and the radial oil hole is arranged corresponding to the flange oil hole 9 along the axial direction of the crankshaft 1. In this embodiment, the radial oil hole is arranged at the middle position in the axial direction of the flange cover plate 5 and is isolated from the first middle pressure cavity 6 below, so that the high-pressure refrigerant can be effectively prevented from entering the first middle pressure cavity 6 through the radial oil hole, and at the same time, it is ensured that the refrigerant oil entering the oil storage cavity 7 from the main oil hole 10 can smoothly enter the shell through the radial oil hole to realize the circulation of the refrigerant oil.

[0032] In one embodiment, the oil passage 11 is a radial oil groove, which is arranged on the upper end surface of the flange cover plate 5. An annular sunk groove is also arranged on the inner peripheral side of the upper end surface of the flange cover plate 5, and the radial oil groove communicates with the sunk groove. In this embodiment, an annular sunk groove communicating with the radial oil groove is further arranged on the inner peripheral side of the flange cover plate 5. When there is too much refrigerant oil in the oil storage cavity, the refrigerant oil flows out from the gap between the flange cover plate 5 and the outer wall surface of the flange journal 8, enters the sunk groove on the upper surface of the flange cover plate 5 for a certain buffer, then flows out along the radial oil groove, and finally flows into the oil sump in the housing along the outer wall surface of the pump body. The sunk groove and the radial oil groove prevent the refrigerant oil from directly flowing into the exhaust hole along the upper surface of the flange cover plate 5, increasing the exhaust resistance and the power consumption of the compressor and reducing the performance of the compressor.

[0033] In one embodiment, the part of the flange cover plate 5 above the flange oil hole 9 is matched with the flange journal 8, and an overflow passage 12 is arranged on the part of the flange cover plate 5 below the flange oil hole 9. The flange oil hole 9 communicates with the oil storage cavity 7 through the overflow passage 12. The lower overflow passage 12 can ensure that the refrigerant oil smoothly enters the oil storage cavity 7 from the flange oil hole 9, so that the oil level in the oil storage cavity 7 can rise rapidly, and an oil film seal is formed between the contact surfaces of the upper flange 4 and the flange cover plate 5 in time, avoiding the leakage of high-pressure refrigerant into the first medium-pressure cavity 6 through the contact gap at this position and affecting the performance of the compressor. For the convenience of installing the flange cover plate 5 on the flange journal 8, the part of the flange cover plate 5 above the flange oil hole 9 and the flange journal 8 are in clearance fit.

[0034] In one embodiment, a lateral oil hole 13 is arranged on the crankshaft 1. The lateral oil hole 13 is at the same height as the flange oil hole 9 along the axial direction of the crankshaft 1, and the lateral oil hole 13 can communicate the flange oil hole 9 and the main oil hole 10.

[0035] In one embodiment, the lateral oil hole 13 is a pressure relief oil hole. An annular oil groove 14 is arranged on the outer peripheral wall of the crankshaft 1. The lateral oil hole 13 is located in the area where the annular oil groove 14 is located and communicates with the annular oil groove 14. In this embodiment, since the lateral oil hole 13 communicates with the annular oil groove 14, and the entire circumferential direction of the annular oil groove 14 can be filled with refrigerant oil, the flange oil hole 9 can always be communicated with the main oil hole 10 through the annular oil groove 14 and the lateral oil hole 13, ensuring that the main oil hole 10 always supplies oil to the flange oil hole 9.

[0036] Combined with Figure 6 As shown in the figure, it is a comparison diagram of a conventional crankshaft and the crankshaft of the embodiment of the present application. The pressure relief hole of the conventional crankshaft is located at the upper part of the long axis of the crankshaft and does not contact the inner wall surface of the flange journal 8. When the compressor operates at high frequency, the refrigerant oil will be thrown out from the pressure relief oil hole, showing an umbrella shape as a whole. At this time, the exhaust flow of the compressor will impact the refrigerant oil, resulting in an increase in the oil spitting rate of the compressor.

[0037] In the embodiment of the present application, since the lateral oil hole 13 is also used as a pressure relief oil hole, and the lateral oil hole 13 is arranged between the flange journal 8 and the crankshaft 1, the lateral oil hole 13 is arranged within the range of the flange journal 8 and communicated with the flange oil hole 9 through the annular oil groove 14. The refrigerating oil flows out from the lateral oil hole 13 and the flange oil hole 9 and then enters the oil storage cavity 7, and finally flows into the oil sump along the outer wall surface of the pump body through the oil passage 11, without interfering with the exhaust flow, and can effectively reduce the oil spitting rate.

[0038] In one embodiment, the pump body assembly further includes a first partition plate 15, a second partition plate 16 and a lower flange 17. The first partition plate 15 and the second partition plate 16 are located between the low-pressure cylinder 2 and the high-pressure cylinder 3, and the lower flange 17 is located on the lower side of the high-pressure cylinder 3. A second medium-pressure cavity 18 is formed between the first partition plate 15 and the second partition plate 16, and the second medium-pressure cavity 18 is communicated with the exhaust port of the low-pressure cylinder 2.

[0039] When the compressor works, the crankshaft 1 rotates to pump the refrigerating oil in the shell to each oil outlet hole on the crankshaft 1 through the oil suction pipe and the oil guiding piece, and the refrigerating oil flows out from each oil outlet hole to lubricate and cool each part of the pump body. When the refrigerating oil is pumped to the lateral oil hole 13 of the crankshaft, the refrigerating oil flows out from the lateral oil hole 13 and enters the cavity formed by the combination of the annular oil groove 14 of the crankshaft 1 and the inner wall surface of the upper flange 4. As the oil pumping time increases, the oil level in the cavity gradually rises. When the oil level in the cavity exceeds the flange oil hole 9, the refrigerating oil flows into the oil storage cavity 7 formed by the combination of the flange cover plate 5 and the tool withdrawal groove on the upper flange. When the oil level height in the oil storage cavity 7 exceeds the contact surface between the upper flange 4 and the flange cover plate 5, the refrigerating oil in the oil storage cavity 7 enters the contact surface gap to seal the contact surface and prevent the high-pressure refrigerant in the shell from leaking into the first medium-pressure cavity 6 formed by the upper flange 4 and the flange cover plate 5, affecting the performance of the compressor.

[0040] When the oil level height in the oil storage cavity 7 exceeds the lowest height of the flange oil hole 9, the refrigerating oil flows out along the flange oil hole 9 and finally flows into the oil sump along the outer wall surface of the pump body. The flange oil hole 9 prevents the problem that when there is too much refrigerating oil in the oil storage cavity 7, the refrigerating oil flows out from the gap between the outer wall surfaces of the flange cover plate 5 and the flange journal 8 and flows into the exhaust hole along the upper surface of the flange cover plate 5, increasing the exhaust resistance and the power consumption of the compressor and reducing the performance of the compressor.

[0041] According to the embodiment of the present application, the compressor includes a pump body assembly, and the pump body assembly is the above-mentioned pump body assembly.

[0042] According to the embodiment of the present application, the air conditioner includes the above-mentioned pump body assembly or the above-mentioned compressor.

[0043] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0044] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and variations can be made without departing from the technical principle of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A pump body assembly, characterized in that, it includes a crankshaft (1), a low-pressure cylinder (2), a high-pressure cylinder (3), an upper flange (4) and a flange cover plate (5). A first medium-pressure cavity (6) communicating with the exhaust port of the low-pressure cylinder (2) is provided at the top of the upper flange (4). The flange cover plate (5) is covered on the upper end surface of the upper flange (4) and closes the first medium-pressure cavity (6). The upper flange (4) has a tool withdrawal groove at the connection position of the flange journal (8) and the upper end surface. The flange cover plate (5) and the tool withdrawal groove cooperate to form an oil storage cavity (7). A flange oil hole (9) is provided on the flange journal (8), and a main oil hole (10) is provided on the crankshaft (1). The main oil hole (10) communicates with the oil storage cavity (7) through the flange oil hole (9).

2. The pump body assembly according to claim 1, characterized in that, the inner edge of the lower end surface of the flange cover plate (5) is located radially inside the outer edge of the tool withdrawal groove.

3. The pump body assembly according to claim 1, characterized in that, an oil passage (11) extending radially is provided on the flange cover plate (5). The oil passage (11) penetrates through the flange cover plate (5) and communicates with the oil storage cavity (7). The oil passage (11) is located above the bottom surface of the flange cover plate (5) and is isolated from the first medium-pressure cavity (6).

4. The pump body assembly according to claim 3, characterized in that, the oil passage (11) is a radial oil hole, and the radial oil hole is arranged axially along the crankshaft (1) corresponding to the flange oil hole (9).

5. The pump body assembly according to claim 3, characterized in that, the oil passage (11) is a radial oil groove. The radial oil groove is provided on the upper end surface of the flange cover plate (5). An annular sinking groove is further provided on the inner peripheral side of the upper end surface of the flange cover plate (5). The radial oil groove communicates with the sinking groove.

6. The pump body assembly according to claim 1, characterized in that, the part of the flange cover plate (5) above the flange oil hole (9) is matched with the flange journal (8). A flow-through passage (12) is provided on the part of the flange cover plate (5) below the flange oil hole (9). The flange oil hole (9) communicates with the oil storage cavity (7) through the flow-through passage (12).

7. The pump body assembly according to claim 1, characterized in that, a lateral oil hole (13) is provided on the crankshaft (1). The lateral oil hole (13) is at the same height as the flange oil hole (9) axially along the crankshaft (1), and the lateral oil hole (13) can communicate the flange oil hole (9) and the main oil hole (10).

8. The pump body assembly according to claim 7, characterized in that, the lateral oil hole (13) is a pressure relief oil hole. An annular oil groove (14) is provided on the outer peripheral wall of the crankshaft (1). The lateral oil hole (13) is located in the area where the annular oil groove (14) is located and communicates with the annular oil groove (14).

9. The pump body assembly according to claim 1, characterized in that, The pump body assembly further includes a first partition plate (15), a second partition plate (16) and a lower flange (17). The first partition plate (15) and the second partition plate (16) are located between the low-pressure cylinder (2) and the high-pressure cylinder (3). The lower flange (17) is located on the lower side of the high-pressure cylinder (3). A second medium-pressure chamber (18) is formed between the first partition plate (15) and the second partition plate (16), and the second medium-pressure chamber (18) is communicated with the exhaust port of the low-pressure cylinder (2).

10. A compressor, comprising a pump body assembly, characterized in that the pump body assembly is the pump body assembly according to any one of claims 1 to 9.

11. An air conditioner, characterized in that it includes the pump body assembly according to any one of claims 1 to 9 or the compressor according to claim 10.

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