Compressor upper cover assembly, compressor, air conditioner

Abstract

The application provides a compressor upper cover assembly, a compressor and an air conditioner, wherein the compressor upper cover assembly comprises an upper cover and an exhaust pipe assembly on the upper cover, the exhaust pipe assembly comprises a first pipe fitting communicating the inner side and the outer side of the upper cover and a second pipe fitting communicating with the first pipe fitting, the second pipe fitting has an air inlet communicating with the inner cavity of the compressor, and the refrigerant gas flow entering the air inlet enters the first pipe fitting after being deflected by a first non-zero preset angle and is discharged from the compressor. According to the application, the refrigerant gas flow is deflected by a certain angle under the action of the second pipe fitting and then enters the first pipe fitting for discharge. Since the flowing state of the lubricating oil droplets and the gaseous refrigerant is different, the lubricating oil will more impact on the inner wall of the compressor shell and the outer wall of the second pipe fitting under the action of the inertial force, so as to play a separation role of the lubricating oil and the refrigerant, thereby reducing the oil discharge rate of the compressor and the oil storage rate of the system.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a compressor top cover assembly, a compressor, and an air conditioner. Background Technology

[0002] When designing a rotary compressor, the design of the oil circuit is crucial to ensuring its normal operation. An improperly designed oil circuit can easily lead to poor lubrication and inadequate sealing, resulting in increased frictional power consumption and reduced cooling capacity. In severe cases, it can even cause abnormal wear and damage to the compressor.

[0003] Oil circulation is divided into external circulation and internal circulation. Internal circulation is the oil circuit circulation inside the compressor, while external circulation is the circulation outside the compressor. In order to reduce the oil retention rate of system components, compressor oil-gas separation is divided into internal oil separator and external oil separator. External oil separator increases the overall cost of the system, and generally only larger systems have external oil separator. Smaller systems usually reduce the oil retention rate to ensure efficient operation of the system. Summary of the Invention

[0004] Therefore, the present invention provides a compressor cover assembly, a compressor, and an air conditioner, which can overcome the shortcomings of related technologies where the internal oil circulation of the compressor is not reasonable enough, resulting in insufficient internal lubricating oil retention and excessive system retention, leading to deviations in the heat exchanger heat exchange and throttling effect of the throttling valve.

[0005] To address the aforementioned problems, the present invention provides a compressor top cover assembly, including a top cover and an exhaust pipe assembly thereon. The exhaust pipe assembly includes a first pipe connecting the inner and outer sides of the top cover and a second pipe communicating with the first pipe. The second pipe has an air inlet communicating with the compressor cavity. Refrigerant airflow entering the air inlet enters the first pipe after being deflected by a first non-zero preset angle and is discharged from the compressor.

[0006] In some embodiments, the first pipe fitting includes a first straight pipe section, the second pipe fitting includes a second straight pipe section, the two ends of the second straight pipe section are open to form the air inlet, the middle region of the second straight pipe section is connected to the inlet of the first straight pipe section, and the axis of the second straight pipe section and the axis of the first straight pipe section form the first non-zero preset angle.

[0007] In some implementations, the first non-zero preset angle is 90°.

[0008] In some embodiments, the middle region of the second straight pipe section has a sleeve section extending radially outward therefrom, through which the second straight pipe section is sleeved to the inlet of the first straight pipe section; or, the second straight pipe section includes two straight pipe sub-segments and a tee fitting, with the two straight pipe sub-segments respectively sleeved to the two opposite ports of the tee fitting, and the tee fitting sleeved to the inlet of the first straight pipe section through the remaining port.

[0009] In some embodiments, the distance between the air inlet and the inner wall of the compressor housing is d, where 4mm ≤ d ≤ 8mm.

[0010] In some embodiments, the first pipe fitting includes a first straight pipe section, the second pipe fitting includes a second straight pipe section, the two ends of the second straight pipe section are closed and a plurality of air inlets are formed on one side wall facing the first pipe fitting, the middle region of the second straight pipe section is connected to the inlet of the first straight pipe section, and the axis of the second straight pipe section forms a second non-zero preset angle with the axis of the first straight pipe section.

[0011] In some implementations, the second non-zero preset angle is 90°.

[0012] In some embodiments, the middle region of the second straight pipe section has a sleeve section extending radially outward therefrom, through which the second straight pipe section is sleeved to the inlet of the first straight pipe section; or, the second straight pipe section includes two straight pipe sub-segments and a tee fitting, with the two straight pipe sub-segments respectively sleeved to the two opposite ports of the tee fitting, and the tee fitting sleeved to the inlet of the first straight pipe section through the remaining port.

[0013] The present invention also provides a compressor, including the compressor cover assembly described above.

[0014] The present invention also provides an air conditioner, including the compressor described above.

[0015] The present invention provides a compressor top cover assembly, a compressor, and an air conditioner. Compared with the straight pipe exhaust structure in the prior art, the refrigerant gas flow discharged from the compressor pump assembly does not directly enter the first pipe and exit the compressor. Instead, under the action of the second pipe, the flow direction of the refrigerant gas flow is deflected at a certain angle before entering the first pipe and exiting. Since the flow states of lubricating oil droplets and gaseous refrigerant are different, the lubricating oil will impact the inner wall of the compressor housing and the outer wall of the second pipe more under the action of inertial force, thereby achieving the separation of lubricating oil and refrigerant, thereby reducing the oil discharge rate of the compressor and the oil retention rate of the system. Attached Figure Description

[0016] Figure 1This is a schematic diagram of a compressor top cover assembly according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of another structure of the compressor top cover assembly according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of another structure of the compressor top cover assembly according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of another structure of the compressor top cover assembly according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the internal structure of the compressor according to an embodiment of the present invention.

[0021] The reference numerals in the attached figures are as follows:

[0022] 1. Top cover; 21. First pipe fitting; 211. First straight pipe section; 22. Second pipe fitting; 221. Air inlet; 222. Second straight pipe section; 2221. Straight pipe sub-section; 2222. T-fitting; 101. Terminal block; 102. Bolt; 103. Bottom cover; 104. Lubricating oil; 105. Compressor pump body assembly; 106. Terminal block sleeve; 107. Rubber stopper; 108. Large rubber stopper; 109. Pressure plate; 110. Rubber pad; 111. Distributor. Detailed Implementation

[0023] See also Figures 1 to 5 As shown, according to an embodiment of the present invention, a compressor top cover assembly is provided, including a top cover 1 and an exhaust pipe assembly thereon. The exhaust pipe assembly includes a first pipe 21 communicating with the inner and outer sides of the top cover 1 and a second pipe 22 communicating with the first pipe 21. The second pipe 22 has an air inlet 221 communicating with the compressor cavity. The refrigerant airflow entering the air inlet 221 enters the first pipe 21 and exits the compressor after being deflected by a first non-zero preset angle. In this technical solution, compared with the straight pipe exhaust structure in the prior art, the refrigerant airflow discharged by the compressor pump assembly 105 does not directly enter the first pipe 21 and exit the compressor. Instead, under the action of the second pipe 22, the flow direction of the refrigerant airflow is deflected at a certain angle before entering the first pipe 21 and exiting. Since the flow states of lubricating oil droplets and gaseous refrigerant are different, the lubricating oil will impact the inner wall of the compressor housing and the outer wall of the second pipe 22 more under the action of inertial force, thereby achieving the separation of lubricating oil and refrigerant, thereby reducing the oil discharge rate of the compressor and the oil retention rate of the system. It is understandable that the first pipe component 21 in the exhaust pipe assembly is welded to the upper cover 1 as a single unit.

[0024] In some implementations, see Figure 1As shown, the first pipe fitting 21 includes a first straight pipe section 211, and the second pipe fitting 22 includes a second straight pipe section 222. The two ends of the second straight pipe section 222 are open to form air inlets 221. The middle region of the second straight pipe section 222 is connected to the inlet of the first straight pipe section 211, and the axis of the second straight pipe section 222 forms a first non-zero preset angle with the axis of the first straight pipe section 211, that is, a cross angle is formed between the first pipe fitting 21 and the second pipe fitting 22. Thus, the refrigerant discharged from the compressor pump assembly 105 can enter the second straight pipe section 222 from both ends after passing through the stator and rotor structure, objectively forming a side-mounted air intake path. This method can significantly alter the flow path of the refrigerant and lubricating oil, thereby facilitating their collision and separation with the wall of the flow area, further reducing the oil discharge rate of the compressor.

[0025] In some embodiments, the first non-zero preset angle is 90°, that is, the first straight pipe section 211 and the second straight pipe section 222 are perpendicular to each other. This is beneficial for their arrangement in the compressor housing and facilitates their assembly and connection.

[0026] The second straight pipe section 222 has a sleeve section extending radially outward in its middle region. The second straight pipe section 222 is sleeved to the inlet of the first straight pipe section 211 through the sleeve section. Furthermore, the sleeve section is welded to the inlet of the first straight pipe section 211 after being sleeved to ensure a firm connection; or, see Figure 2 As shown, the second straight pipe section 222 includes two straight pipe sub-sections 2221 and a tee fitting 2222. The two straight pipe sub-sections 2221 are respectively connected to the two opposite pipe openings of the tee fitting 2222. The tee fitting 2222 is connected to the inlet of the first straight pipe section 211 through the remaining pipe opening. The positions where they are connected can be welded to ensure a firm and reliable connection.

[0027] The connection position between the first straight pipe section 211 and the second straight pipe section 222 can be flexibly adjusted according to the space (inner diameter) inside the compressor housing and the smoothness of airflow. Preferably, the distance between the air inlet 221 and the inner wall of the compressor housing is d, 4mm≤d≤8mm. This allows the air inlet 221 to form a relatively narrow area with the adjacent compressor housing, which allows the refrigerant airflow to collide more strongly with the wall in this area, which is conducive to the effective separation of lubricating oil in the refrigerant. Specifically, this technical solution significantly alters the refrigerant airflow field, with high-speed fluid distributed more near the inner wall of the casing. Due to the changed flow field distribution in the upper cavity of the motor, the gas-liquid mixture exiting the rotor flow hole moves closer to the inner wall of the casing. Because of the difference in mass between the refrigerant and lubricating oil, lubricating oil droplets collide with the inner wall of the casing and the outer wall of the exhaust pipe due to inertial force, thus achieving gas-liquid separation. The refrigerant impacting the inner wall of the casing is more likely to collect at the stator tangent under the influence of gravity, making it easier for it to return to the bottom of the compressor and remain more inside the compressor. This further reduces the amount of lubricating oil discharged from the compressor, lowers the oil content in the system, and improves the overall operating efficiency of the system.

[0028] See Figure 3 As shown, in some embodiments, the first pipe fitting 21 includes a first straight pipe section 211, and the second pipe fitting 22 includes a second straight pipe section 222. The two ends of the second straight pipe section 222 are closed, and a plurality of air inlets 221 are constructed on the side wall facing the first pipe fitting 21. The middle region of the second straight pipe section 222 is connected to the inlet of the first straight pipe section 211, and the axis of the second straight pipe section 222 and the axis of the first straight pipe section 211 form a second non-zero preset angle. The air inlets 221 are arranged at intervals along the length direction of the second straight pipe section 222 and face the side of the upper cover 1, that is, away from the refrigerant discharge direction of the compressor pump assembly 105, which can make the flow field distribution more uniform, thereby making the lubricating oil and refrigerant more fully separated inside the compressor. In one specific implementation, the second non-zero preset angle is 90°. It can be understood that the first non-zero preset angle is approximately 180°. That is, the refrigerant airflow flows from the upper cover 1 to the second straight pipe section 222, enters the second straight pipe section 222 through the air inlet 221, then rotates 180° before entering the first straight pipe section 211 and being discharged. In this technical solution, the number and diameter of the air inlets 221 can be adjusted according to actual conditions.

[0029] In some embodiments, the middle region of the second straight pipe section 222 has a sleeve section extending radially outward therefrom, and the second straight pipe section 222 is sleeved to the inlet of the first straight pipe section 211 through the sleeve section; or, see Figure 4As shown, the second straight pipe section 222 includes two straight pipe sub-sections 2221 and a tee fitting 2222. The two straight pipe sub-sections 2221 are respectively connected to the two opposite ports of the tee fitting 2222. The tee fitting 2222 is connected to the inlet of the first straight pipe section 211 through the remaining port. All the interconnected positions can be welded to ensure a firm and reliable connection.

[0030] According to an embodiment of the present invention, a compressor is also provided, including the compressor cover assembly described above.

[0031] According to an embodiment of the present invention, an air conditioner is also provided, including the compressor described above.

[0032] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A compressor cover assembly, characterized in that, Includes an upper cover (1) and an exhaust pipe assembly thereon, the exhaust pipe assembly including a first pipe (21) connecting the inner and outer sides of the upper cover (1) and a second pipe (22) communicating with the first pipe (21), the second pipe (22) having an air inlet (221) communicating with the inner cavity of the compressor, the refrigerant airflow entering the air inlet (221) enters the first pipe (21) after being deflected by a first non-zero preset angle and is discharged from the compressor; The first pipe fitting (21) includes a first straight pipe section (211), and the second pipe fitting (22) includes a second straight pipe section (222). The two ends of the second straight pipe section (222) are closed and a plurality of air inlets (221) are constructed on the side wall facing the first pipe fitting (21). The middle region of the second straight pipe section (222) is connected to the inlet of the first straight pipe section (211), and the axis of the second straight pipe section (222) and the axis of the first straight pipe section (211) form a second non-zero preset angle.

2. The compressor cover assembly according to claim 1, characterized in that, The second non-zero preset angle is 90°.

3. The compressor cover assembly according to claim 1, characterized in that, The second straight pipe section (222) has a sleeve section extending radially outward in its middle region, and the second straight pipe section (222) is sleeved with the inlet of the first straight pipe section (211) through the sleeve section; or, the second straight pipe section (222) includes two straight pipe sub-sections (2221) and a tee fitting (2222), the two straight pipe sub-sections (2221) are respectively sleeved with the two opposite pipe openings of the tee fitting (2222), and the tee fitting (2222) is sleeved with the inlet of the first straight pipe section (211) through the remaining pipe opening.

4. A compressor, characterized in that, The compressor cover assembly includes any one of claims 1 to 3.

5. An air conditioner, characterized in that, Includes the compressor described in claim 4.

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