CN215409185U

CN215409185U - Scroll compressor with rotary oil separation structure

Info

Publication number: CN215409185U
Application number: CN202120559830.3U
Authority: CN
Inventors: 李杨星; 马家志; 胡裕峰
Original assignee: Johnson Controls Hitachi Wanbao Compressor Guangzhou Co Ltd
Current assignee: Johnson Controls Hitachi Wanbao Compressor Guangzhou Co Ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2022-01-04
Anticipated expiration: 2031-03-18

Abstract

The utility model provides a scroll compressor with a rotary oil separating structure, which comprises a shell, an upper bracket, a fixed scroll, a movable scroll, a crankshaft and a motor, wherein the upper bracket, the fixed scroll, the movable scroll, the crankshaft and the motor are arranged in the shell; an exhaust cavity is arranged above the fixed scroll and the upper support, the upper part of the crankshaft movably penetrates through the upper support, a balance block is arranged at the middle upper part below the upper support, the motor is arranged at the middle lower part of the crankshaft, and upper passages are arranged at the edges of the fixed scroll and the upper support; in particular: a guide plate is coaxially arranged between the upper support and the balance block on the crankshaft, the guide plate is an inverted cone-shaped shell with openings at two ends, the edge of the top end of the guide plate is attached to the inner wall of the shell, a guide cavity is formed between the guide plate and the upper support, a separation cavity is formed between the guide plate and the motor, and the guide cavity is communicated with the exhaust cavity through an upper passage; a flow guide gap is arranged between the bottom end of the flow guide plate and the crankshaft. The utility model utilizes the rotary oil separation structure to efficiently solve the problems of oil rise and energy efficiency of the compressor on the premise of adding minimum parts and simple processing.

Description

Scroll compressor with rotary oil separation structure

Technical Field

The utility model relates to a refrigeration device, in particular to a scroll compressor.

Background

At present, all scroll compressors achieve the purpose of oil separation by changing the flow direction or the flow speed of a mixture of high-pressure refrigerant discharged by a fixed scroll and refrigerating machine oil, the rotation speed or the discharge capacity of the traditional scroll compressor is not high, and the requirement can be met by using the original oil separation mode of changing the flow direction and speed. However, with the stricter requirements of the market on the compressor and the development of the national industrial level, the rotating speed of the new generation of scroll compressor can be made to be very high and can reach 160rps at most, and the scroll compressor is also enlarged, the original compressor displacement of the phi 160 cylinder diameter can only reach 85cc/rev of the constant speed, but the current new generation of scroll compressor can achieve 110cc/rev of the frequency conversion under the same cylinder diameter. Therefore, the flow rates of the refrigerant and the refrigerating machine oil discharged at the same time are more than 4 times of that of the original scroll compressor, and the original design of only changing the fluid flow rate and the flow velocity of the scroll compressor cannot meet the requirement of oil separation. If the oil separation of the scroll compressor is not well done, the rate of oil circulation in the air conditioning system will increase. The refrigerating machine oil in the scroll compressor enters an air conditioning system along with a refrigerant, and the defect of excessive oil quantity to the air conditioning system is mainly expressed in three aspects, namely, the heat exchange effect of an air conditioning heat exchanger is reduced, and the actual capacity of an air conditioner is reduced; secondly, excessive refrigerating machine oil runs into the air conditioning system, so that an oil-free state can occur in the compressor, and the reliability of the compressor is reduced; third, an increase in oil circulation rate indicates that the compressor suction volume will be replaced by a portion of the refrigerating machine oil, which will actually reduce the refrigeration capacity of the compressor, since the oil is incompressible and, in the severe cases, the sucked refrigerating machine oil will also cause fragmentation of the compressor scroll, directly rendering the scroll compressor ineffective. Therefore, in the evaluation of the oil circulation rate of the compressor, it is acceptable that the oil circulation rate is less than 4% when the compressor is operated at 120rps under the standard operating condition. It is therefore necessary to propose a new oil separating structure.

Disclosure of Invention

The utility model aims to provide a scroll compressor with a rotary oil separation structure, which breaks through the traditional oil separation structure, guides a high-pressure refrigerant and a mixture of refrigerating machine oil into a rotating body consisting of parts such as a crankshaft and the like by using a guide plate, and effectively solves the problems of oil rise and energy efficiency of the compressor by utilizing the rotary oil separation structure under the premise of adding minimum parts and simple processing in a new generation of compressor.

The purpose of the utility model can be realized by the following technical scheme:

a scroll compressor with a rotary oil separation structure comprises a shell and a scroll compressor assembly arranged in the shell, wherein the scroll compressor assembly comprises an upper bracket, a fixed scroll, a movable scroll, a crankshaft and a motor; the fixed scroll and the movable scroll are arranged above the upper support to form a scroll compression chamber, an exhaust chamber is arranged above the fixed scroll and the upper support in the shell, the fixed scroll is provided with a compression chamber exhaust port and a compression chamber air inlet which are communicated with the scroll compression chamber, the shell is provided with an air suction pipe connected with the compression chamber air inlet, and the shell is provided with an exhaust port and is externally connected with an exhaust pipe; the upper part of the crankshaft movably penetrates through the upper support, the eccentric part of the crankshaft is inserted into the eccentric shaft sleeve of the movable scroll plate, the middle upper part of the crankshaft is positioned below the upper support and is provided with a balance block, the balance block and the crankshaft are arranged in an eccentric mode, the motor is arranged at the middle lower part of the crankshaft, and the edge of the fixed scroll plate and the edge of the upper support are provided with an upper passage which is vertically communicated; the method is characterized in that: a guide plate is coaxially arranged between the upper support and the balance block on the crankshaft, the guide plate is of an inverted cone-shaped shell structure with openings at two ends, the edge of the top end of the guide plate is attached to the inner wall of the shell, a guide cavity is formed between the upper part of the guide plate in the shell and the upper support, a separation cavity is formed between the lower part of the guide plate and the motor, the guide cavity is communicated with the exhaust cavity through an upper passage, and an exhaust port on the shell is correspondingly arranged below the guide plate to ensure that an inner port of the exhaust pipe is communicated with the separation cavity; a flow guide gap is arranged between the bottom end of the flow guide plate and the crankshaft.

According to the optimized scheme, the top end of the guide plate is provided with the annular side plate part, the annular side plate part is provided with a plurality of guide plate mounting holes, the guide plate mounting holes corresponding to the guide plate on the bottom of the upper support are provided with upper support mounting holes, and the guide plate is fixedly connected to the upper support through the mounting bolts, the guide plate mounting holes and the upper support mounting holes.

According to the optimized scheme, the bottom end of the guide plate is provided with a tubular end plate part which is coaxial with the crankshaft.

According to the optimized scheme, the edge of the stator of the motor is provided with a vertical lower passage.

According to the optimized scheme, the bottom of the upper support is provided with an upper support shaft part which is coaxial with the crankshaft, and the upper support shaft part penetrates through a flow guide gap between the flow guide plate and the crankshaft.

The utility model has the following substantive characteristics and progresses:

1. the outer diameter of the top end of the guide plate is basically the same as the inner diameter of the shell nearby the guide plate, and only necessary installation gaps are left, so that mixed air flow in the guide cavity can be quickly and directly guided to the balance block through the guide gaps, the contact efficiency of the mixed air flow and the rotating balance block is effectively ensured, and the separation effect of the refrigeration oil is improved.

2. The guide plate is aligned with the bottom surface of the upper bracket through the annular side plate part at the top end and is tightly connected with the bottom surface of the upper bracket through the mounting bolt, so that the sealing property between the guide plate and the upper bracket is effectively ensured, the mixed airflow in the guide cavity flows downwards along the guide gap, and the separation effect of the refrigeration oil is further improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partial structural schematic diagram of the present invention.

Fig. 3 is a schematic structural diagram of a top view of a baffle according to the present invention.

Fig. 4 is a schematic structural view of a cross-sectional state of a baffle according to the present invention.

Detailed Description

The utility model will be further explained with reference to the drawings.

Examples

Referring to fig. 1 to 4, a scroll compressor with a rotary oil separating structure includes a housing 1 and a scroll compressor assembly installed in the housing 1, the scroll compressor assembly including an upper bracket 4, a fixed scroll 2, a movable scroll 3, a crankshaft 5 and a motor.

The fixed scroll 2 and the movable scroll 3 are arranged above the upper bracket 4 to form a scroll compression chamber 10, an exhaust chamber 20 is arranged above the fixed scroll 2 and the upper bracket 4 in the shell 1, the fixed scroll 2 is provided with a compression chamber exhaust port 21 and a compression chamber air inlet which are communicated with the scroll compression chamber 10, the shell 1 is provided with an air suction pipe 11 connected with the compression chamber air inlet, and the shell 1 is provided with an exhaust port and is externally connected with an exhaust pipe 12; the upper part of the crankshaft 5 movably passes through the upper bracket 4, the eccentric part 51 of the upper bracket is inserted into the eccentric sleeve of the movable scroll 3, the bottom of the upper bracket 4 is provided with an upper bracket shaft part 41 which is coaxially arranged with the crankshaft 5, the middle upper part of the crankshaft 5 is positioned below the upper bracket 4 and is provided with a balance weight 50, the balance weight 50 is eccentrically arranged with the crankshaft 5, the motor is arranged at the middle lower part of the crankshaft 5, and the edge part of the stator 6 of the motor is provided with a vertical lower passage 60. The fixed scroll 2 has an upper passage 40 vertically penetrating through a side portion of the upper bracket 4.

The coaxial arrangement that lies in between upper bracket 4 and balancing piece 50 on bent axle 5 has guide plate 7, specifically refer to fig. 3 and fig. 4, guide plate 7 has open-ended back taper shell structure for both ends, guide plate 7's top has annular sideboard portion 73, has a plurality of guide plate mounting holes 74 on the annular sideboard portion 73, and the guide plate mounting hole 74 that corresponds guide plate 7 on upper bracket 4's the bottom has the upper bracket mounting hole, and guide plate 7 passes through mounting bolt 75, guide plate mounting hole 74 and upper bracket mounting hole fastening connection on upper bracket 4. The bottom end of the baffle 7 has a tubular end plate portion 76 disposed coaxially with the crankshaft 5.

The top end edge of the guide plate 7 is attached to the inner wall of the shell 1, a guide cavity 70 is formed between the upper part of the guide plate 7 in the shell 1 and the upper support 4, a separation cavity 71 is formed between the lower part of the guide plate 7 and the motor, the guide cavity 70 is communicated with the exhaust cavity 20 through the upper passage 40, and the exhaust port on the shell 1 is correspondingly arranged below the guide plate 7 to enable the inner port of the exhaust pipe 12 to be communicated with the separation cavity 71; a flow guide gap 72 is formed between the bottom end of the flow guide plate 7 and the crankshaft, and the upper bracket shaft portion 41 of the upper bracket 4 penetrates through the flow guide gap 72.

In the operation of the scroll compressor of this embodiment, the guide plate 7 is installed at the lower side of the upper bracket 4, and is used for guiding the mixed high-pressure air flow of the refrigerant and the oil discharged from the scroll compression chamber 10 into the discharge chamber 20 to the balance weight 50 below the upper bracket 4 through the upper passage 40 → the guide chamber 70 → the guide gap 72, after the high-pressure air flow is guided to the balance weight 50 by the guide plate 7, the high-pressure air flow is driven to rotate by the rotating balance weight 50, during the rotation process, oil particles in the mixed high-pressure air flow of the refrigerant and the oil are separated from the mixed air under the action of centrifugal force, adhered to the balance weight 50, and fall onto the motor under the action of gravity, the oil particles flow into the oil pool at the bottom in the casing 1 along the gap between the motor rotor 61 and the stator 6, and the separated high-pressure air enters the air conditioning system through the separation chamber 71 → the discharge pipe 12.

Claims

1. A scroll compressor with a rotary oil separation structure comprises a shell (1) and a scroll compressor assembly arranged in the shell (1), wherein the scroll compressor assembly comprises an upper bracket (4), a fixed scroll (2), a movable scroll (3), a crankshaft (5) and a motor; the fixed scroll (2) and the movable scroll (3) are arranged above the upper support (4) to form a scroll compression chamber (10), an exhaust chamber (20) is arranged above the fixed scroll (2) and the upper support (4) in the shell (1), the fixed scroll (2) is provided with a compression chamber exhaust port (21) and a compression chamber air inlet which are communicated with the scroll compression chamber (10), the shell (1) is provided with an air suction pipe (11) connected with the compression chamber air inlet, and the shell (1) is provided with an exhaust port and is externally connected with an exhaust pipe (12); the upper part of the crankshaft (5) movably penetrates through the upper support (4), an eccentric part (51) of the crankshaft is inserted into an eccentric bushing of the movable scroll (3), a balance block (50) is arranged at the middle upper part of the crankshaft (5) below the upper support (4), the balance block (50) and the crankshaft (5) are eccentrically arranged, the motor is arranged at the middle lower part of the crankshaft (5), and an upper passage (40) which is vertically communicated with the edge part of the fixed scroll (2) and the edge part of the upper support (4) is arranged; the method is characterized in that: a guide plate (7) is coaxially mounted between the upper support (4) and the balance block (50) on the crankshaft (5), the guide plate (7) is of an inverted cone-shaped shell structure with openings at two ends, the edge of the top end of the guide plate (7) is attached to the inner wall of the shell (1), a guide cavity (70) is formed between the upper part of the guide plate (7) and the upper support (4) in the shell (1), a separation cavity (71) is formed between the lower part of the guide plate (7) and the motor, the guide cavity (70) is communicated with the exhaust cavity (20) through an upper passage (40), and an exhaust port on the shell (1) is correspondingly arranged below the guide plate (7) so that an inner port of the exhaust pipe (12) is communicated with the separation cavity (71); a flow guide gap (72) is arranged between the bottom end of the flow guide plate (7) and the crankshaft.

2. The scroll compressor with a rotary oil separating structure according to claim 1, wherein: the top of guide plate (7) has annular sideboard portion (73), has a plurality of guide plate mounting holes (74) on annular sideboard portion (73), and guide plate mounting hole (74) that correspond guide plate (7) on the bottom of upper bracket (4) have an upper bracket mounting hole, and guide plate (7) pass through mounting bolt (75), guide plate mounting hole (74) and upper bracket mounting hole fastening connection on upper bracket (4).

3. The scroll compressor with a rotary oil separating structure according to claim 1, wherein: the bottom end of the guide plate (7) is provided with a tubular end plate part (76) which is coaxial with the crankshaft (5).

4. A scroll compressor with a rotary oil separating structure according to claim 1, 2 or 3, wherein: the edge of the stator (6) of the motor has a vertical lower passage (60).

5. A scroll compressor with a rotary oil separating structure according to claim 1, 2 or 3, wherein: the bottom of the upper support (4) is provided with an upper support shaft part (41) which is coaxial with the crankshaft (5), and the upper support shaft part (41) penetrates through a flow guide gap (72) between the flow guide plate (7) and the crankshaft (5).