Pump body, compressor and refrigeration equipment

Abstract

The invention provides a pump body, a compressor and refrigeration equipment. The pump body is used for the compressor and comprises a body, the body is provided with at least one notch penetrating through the body in the axial direction of the pump body, and oil in the compressor can flow back to the bottom of the compressor through the notch; on one radial cross section of the body, the intersection point of the axis of the pump body and the radial cross section is a first point, the point, closest to the axis of the pump body, on the radial inner edge of the notch is a second point, and the diameter of a circle which takes the first point as the circle center and passes through the second point is a first diameter D1; the point, farthest from the axis of the pump body, on the radial outer edge of the notch is a third point, the diameter of a circle which takes the first point as the circle center and passes through the third point is a second diameter D2, and the first diameter D1 and the second diameter D2 meet the following relation that (D2-D1) / 2 is larger than or equal to 10 mm and smaller than or equal to 16 mm. According to the pump body, the smoothness of oil return in the compressor is improved, so that the liquid level of oil liquid in the oil pool is maintained at a certain height, and the oil liquid can lubricate the operation of the compressor more sufficiently.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular, to a pump body, a compressor, and a refrigeration device. Background Art

[0002] Currently, in the related art, when the compressor stops operating in a low-temperature environment, the refrigerant gradually condenses into a liquid state and accumulates inside the compressor. The oil in the oil sump mixes with the liquid refrigerant. The lower the ambient temperature and the longer the shutdown time, the more refrigerant is dissolved in the oil. When the compressor starts working again, the refrigerant undergoes flash evaporation when heated and carries the oil in the oil sump to move towards the top of the compressor, thereby causing the liquid level of the oil in the oil sump to decrease, affecting the stability of the compressor. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of the present invention provides a pump body.

[0005] A second aspect of the present invention provides a compressor.

[0006] A third aspect of the present invention provides a refrigeration device.

[0007] In view of this, a first aspect of the present invention provides a pump body for a compressor. The pump body includes a body provided with at least one cutout that penetrates the body along the axial direction of the pump body. The oil in the compressor can flow back to the bottom of the compressor through the cutout. Wherein, on a radial cross-section of the body, the intersection point of the axis of the pump body and the radial cross-section is a first point, and the point on the radial inner edge of the cutout closest to the axis of the pump body is a second point. The diameter of the circle with the first point as the center and passing through the second point is a first diameter D1. The point on the radial outer edge of the cutout farthest from the axis of the pump body is a third point. The diameter of the circle with the first point as the center and passing through the third point is a second diameter D2. The first diameter D1 and the second diameter D2 satisfy the following relationship: 10 mm ≤ (D2 - D1) / 2 ≤ 16 mm.

[0008] The pump body provided by the present application is used for a compressor. The pump body can cooperate with the piston of the compressor to compress the refrigerant. The pump body includes a main body, and at least one cut is provided in the main body and penetrates the main body along the axial direction of the pump body. After the refrigerant at the bottom of the pump body is compressed by the cooperation of the pump body and the piston and flows to the top of the compressor, after the refrigerant and the oil are separated at the top of the compressor, the refrigerant is discharged from the compressor through the exhaust port of the compressor, and the oil can flow back to the bottom of the compressor through the cut and return to the oil sump, thereby realizing the return of the oil inside the compressor. On a radial section of the main body, the point on the radial inner edge of the cut that is closest to the axis of the pump body is the second point, and the diameter of the circle with the first point as the center and passing through the second point is the first diameter, that is, the first diameter is the diameter of the smallest inner circle of the cut; the point on the radial outer edge of the cut that is farthest from the axis of the pump body is the third point, and the diameter of the circle with the first point as the center and passing through the third point is the second diameter, that is, the second diameter is the diameter of the largest outer circle of the cut; the first diameter D1 and the second diameter D2 satisfy the following relationship: 10mm ≤ (D2 - D1) / 2 ≤ 16mm, so that the width of the cut is between 10mm and 16mm, improving the smoothness of the oil return inside the compressor, and further enabling the liquid level of the oil in the oil sump to be maintained at a certain height, and the oil can lubricate the operation of the compressor more fully, improving the stability during the operation of the compressor.

[0009] When the compressor starts to work at a relatively low ambient temperature, a large amount of refrigerant is dissolved in the oil sump. After heating, the refrigerant in the oil sump flashes to generate a large amount of gas that flows upward through the cut. By setting half of the difference between the second diameter and the first diameter to be greater than or equal to 10 millimeters and less than or equal to 16 millimeters, that is, setting the width of the cut to be greater than or equal to 10 millimeters and less than or equal to 16 millimeters, the probability that the upward-flowing gas contacts the oil flowing back through the cut and generates bubbles is reduced, and further the probability of forming an oil film on the wall surface of the cut is reduced. Since the width of the cut is set between 10mm and 16mm, the probability of forming an oil film on the wall surface of the cut can be reduced, so the phenomenon that the upward-flowing gas applies a drag force to the oil film and causes the oil to be unable to flow can be avoided. Furthermore, the impact of the upward-flowing gas on the oil flowing back through the cut is reduced, the resistance suffered by the oil when flowing back through the cut is reduced, and the influence of the upward-flowing gas on the oil return through the cut is reduced.

[0010] Half of the difference between the second diameter and the first diameter is greater than or equal to 10 millimeters, that is, the width of the cut is greater than or equal to 10 millimeters, which increases the width of the cut, and further increases the flow area of the cut, improving the oil return speed of the oil, raising the liquid level of the oil in the oil sump, and reducing the probability of the liquid level in the oil sump being too low; half of the difference between the second diameter and the first diameter is less than or equal to 16 millimeters, that is, the width of the cut is less than or equal to 16 millimeters, reducing the impact of the cut on the strength of the pump body, maintaining the fitting accuracy between the pump body and the piston, and further improving the efficiency of the compressor and extending the service life of the compressor.

[0011] Specifically, on a radial section of the body, the point on the radial inner edge of the notch that is closest to the axis of the pump body is the second point. The center of the circle where the second point is located coincides with the axis of the compressor, and the diameter of the circle where the second point is located is the first diameter. The radial inner edge of the notch is arc-shaped, and the center of the radial inner edge of the notch coincides with the axis of the compressor, so the second point is any point on the radial inner edge of the notch.

[0012] On a radial section of the body, the point on the radial outer edge of the notch that is farthest from the axis of the pump body is the third point. The center of the circle where the third point is located coincides with the axis of the compressor, and the diameter of the circle where the third point is located is the second diameter. The radial outer edge of the notch is arc-shaped, and the center of the radial outer edge of the notch coincides with the axis of the compressor, so the third point is any point on the radial outer edge of the notch.

[0013] The circle where the second point is located and the circle where the third point is located are concentric circles.

[0014] Specifically, half of the difference between the second diameter and the first diameter is 10 millimeters, that is, the width of the notch is 10 millimeters.

[0015] Half of the difference between the second diameter and the first diameter is 16 millimeters, that is, the width of the notch is 16 millimeters.

[0016] Half of the difference between the second diameter and the first diameter is 12 millimeters, that is, the width of the notch is 12 millimeters.

[0017] Half of the difference between the second diameter and the first diameter is 14 millimeters, that is, the width of the notch is 14 millimeters.

[0018] Half of the difference between the second diameter and the first diameter is 15 millimeters, that is, the width of the notch is 15 millimeters.

[0019] Specifically, the notch is provided on the outer peripheral edge of the body, and at least one side of the notch is an opening. For example, the notch can be a groove recessed from the circumferential side wall of the body towards the axis of the compressor.

[0020] In addition, the pump body in the above technical solution provided by the present invention may further have the following additional technical features:

[0021] In some technical solutions of the present invention, optionally, the number of notches is multiple, and the multiple notches are arranged along the circumference of the body.

[0022] In this embodiment, the number of the incisions is multiple, and the multiple incisions are arranged along the circumferential direction of the body, so that the multiple incisions are distributed in the circumferential direction of the body, avoiding the concentration of the incisions in the same area of the body, thereby reducing the influence of the incisions on the overall strength of the pump body, maintaining the fitting accuracy between the pump body and the piston, further improving the efficiency of the compressor, and prolonging the service life of the compressor. And the multiple incisions are distributed in the circumferential direction of the body, which can also increase the total flow area of the incisions, thereby increasing the volume of the oil flowing through the incisions, accelerating the return speed of the oil, further increasing the liquid level of the oil in the oil sump, and reducing the probability of the liquid level in the oil sump being too low.

[0023] Further, along the axial direction of the pump body, the radial cross-sectional area of the incision may remain unchanged, or may gradually increase or decrease.

[0024] In some technical solutions of the present invention, optionally, on a radial section of the body, the angle of the central angle corresponding to each incision among the multiple incisions is a first angle, and the sum of the first angles corresponding to the multiple incisions is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0025] In this embodiment, on a radial section of the body, the angle of the central angle corresponding to each incision among the multiple incisions is a first angle, and the sum of the first angles corresponding to the multiple incisions is greater than or equal to 30 degrees, increasing the flow area of the incision, accelerating the oil return speed of the oil, further increasing the liquid level of the oil in the oil sump, and reducing the probability of the liquid level in the oil sump being too low. On a radial section of the body, the angle of the central angle corresponding to each incision among the multiple incisions is a first angle, and the sum of the first angles corresponding to the multiple incisions is less than or equal to 60 degrees, reducing the influence of the incision on the strength of the pump body, maintaining the fitting accuracy between the pump body and the piston, further improving the efficiency of the compressor, and prolonging the service life of the compressor.

[0026] Specifically, the sum of the first angles corresponding to the multiple incisions is 30 degrees.

[0027] The sum of the first angles corresponding to the multiple incisions is 40 degrees.

[0028] The sum of the first angles corresponding to the multiple incisions is 50 degrees.

[0029] The sum of the first angles corresponding to the multiple incisions is 60 degrees.

[0030] Specifically, each incision corresponds to a first angle, and the sum of all the first angles corresponding to the incisions is the sum of the first angles corresponding to the multiple incisions.

[0031] Specifically, on a radial section of the body, the area corresponding to the notch includes a first edge and a second edge in the circumferential direction. The first edge has a first intersection point with the outer peripheral edge of the notch. The line connecting the first intersection point and the axis of the pump body is the first side of the central angle corresponding to the notch. The second edge has a second intersection point with the outer peripheral edge of the notch. The line connecting the second intersection point and the axis of the pump body is the second side of the central angle corresponding to the notch. The angle between the first side and the second side of the central angle can be used as the angle of the central angle corresponding to the notch.

[0032] The first edge has a third intersection point with the inner peripheral edge of the notch. The line connecting the third intersection point and the axis of the pump body is the first side of the central angle corresponding to the notch. The second edge has a fourth intersection point with the inner peripheral edge of the notch. The line connecting the fourth intersection point and the axis of the pump body is the second side of the central angle corresponding to the notch. The angle between the first side and the second side of the central angle can also be used as the angle of the central angle corresponding to the notch.

[0033] Furthermore, the number of notches is two, namely a first notch and a second notch. The central angle corresponding to the first notch is a first angle, and the central angle corresponding to the second notch is a second angle. The sum of the angles of the first angle and the second angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0034] Furthermore, the number of notches is three, namely a first notch, a second notch and a third notch. The central angle corresponding to the first notch is a first angle, the central angle corresponding to the second notch is a second angle, and the central angle corresponding to the third notch is a third angle. The sum of the angles of the first angle, the second angle and the third angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0035] In some technical solutions of the present invention, optionally, the number of notches is one; on a radial section of the body, the angle of the central angle corresponding to the notch is a second angle, and the second angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0036] In this embodiment, the number of notches is one, which is convenient for machining the pump body, thereby simplifying the machining process of the pump body and reducing the machining difficulty of the pump body. On a radial section of the body, the angle of the central angle corresponding to the notch is a second angle, and the second angle is greater than or equal to 30 degrees, increasing the flow area of the notch and enhancing the oil return speed of the oil, thereby raising the liquid level of the oil in the oil sump and reducing the probability of the liquid level in the oil sump being too low. On a radial section of the body, the angle of the central angle corresponding to the notch is a second angle, and the second angle is less than or equal to 60 degrees, reducing the influence of the notch on the strength of the pump body, maintaining the matching accuracy between the pump body and the piston, thereby enhancing the efficiency of the compressor and prolonging the service life of the compressor.

[0037] Specifically, the central angle corresponding to the notch is 30 degrees.

[0038] The central angle corresponding to the notch is 40 degrees.

[0039] The central angle corresponding to the notch is 50 degrees.

[0040] The central angle corresponding to the notch is 60 degrees.

[0041] In some technical solutions of the present invention, optionally, the body is provided with an oil return passage, and the oil return passage axially penetrates the body along the pump body.

[0042] In this embodiment, an oil return passage is provided on the body, and the oil return passage can further accelerate the oil return speed of the oil.

[0043] Further, a narrow edge is provided on the outer peripheral edge of the oil return passage, that is, the narrow edge and the body enclose the oil return passage.

[0044] In some technical solutions of the present invention, optionally, the pump body is projected axially along the pump body, the area of the projection region corresponding to the oil return passage is the first area, and the area of the projection region corresponding to the notch is the second area. The ratio of the first area to the second area is greater than or equal to 0.8 and less than or equal to 3.

[0045] In this embodiment, the ratio of the first area to the second area is greater than or equal to 0.8 and less than or equal to 3, so that the oil return passage has a certain oil return area to prevent the oil from flowing back to the oil sump when the compressor operates stably.

[0046] Specifically, the ratio of the first area to the second area is 0.8.

[0047] The ratio of the first area to the second area is 1.

[0048] The ratio of the first area to the second area is 1.5.

[0049] The ratio of the first area to the second area is 2.

[0050] The ratio of the first area to the second area is 3.

[0051] Specifically, when the pump body is projected axially along the pump body, the region enclosed by the projection formed by the edge of the oil return passage on the projection plane is the projection region corresponding to the oil return passage.

[0052] When the pump body is projected axially along the pump body, the region enclosed by the projection formed by the edge of the notch on the projection plane is the projection region corresponding to the notch.

[0053] In some technical solutions of the present invention, optionally, the number of the cuts is multiple, the number of the oil return channels is multiple, and the multiple oil return channels and the multiple cuts are alternately arranged.

[0054] In this embodiment, the multiple oil return channels and the multiple cuts are alternately arranged, so that the oil return channels and the cuts are more evenly distributed in the circumferential direction of the body, thereby reducing the probability of oil accumulation in a local area of the body, further improving the oil return efficiency of the oil, and increasing the liquid level of the oil in the oil sump.

[0055] In some technical solutions of the present invention, optionally, on a radial section of the body, the cut is circular, semi-circular or polygonal.

[0056] In this embodiment, on a radial section of the body, the cut is circular, semi-circular or polygonal, so that the oil flows through the cut more smoothly.

[0057] Specifically, the polygon can be a rectangle, a square, a triangle, a rhombus, a parallelogram, a pentagon or a hexagon.

[0058] The second aspect of the present invention provides a compressor, including the pump body according to any of the above technical solutions, so that the compressor has all the beneficial effects of the pump body according to any of the above technical solutions.

[0059] In some technical solutions of the present invention, optionally, the compressor further includes a housing assembly, a stator assembly, a rotor assembly and a piston. The stator assembly is disposed in the housing assembly; the rotor assembly is disposed in the stator assembly; the piston is disposed in the pump body and is connected to the rotor assembly.

[0060] In this technical solution, the stator assembly is disposed in the housing assembly, the rotor assembly is disposed in the stator assembly, the piston is disposed in the pump body and is connected to the rotor assembly, so that the stator assembly can drive the piston to work through the rotor assembly, thereby realizing the compression of the refrigerant.

[0061] Further, the stator assembly includes a stator core and a stator winding. The stator winding is disposed on the stator core. The rotor assembly includes a rotor core and a rotating shaft. The rotor core is disposed in the stator core. The rotating shaft passes through the rotor core. The stator winding can drive the rotor core to rotate, and the rotor core can drive the rotating shaft to rotate.

[0062] Further, the compressor further includes a liquid reservoir, a lower bearing, an upper bearing and a silencer.

[0063] The pump body is disposed between the upper bearing and the lower bearing.

[0064] The housing assembly includes a main housing and a sealing housing. The stator assembly, the rotor assembly and the pump body are disposed in the main housing, and the sealing housing is fastened to the main housing.

[0065] The liquid reservoir is connected to the compression chamber of the pump body, and the liquid reservoir is used for gas-liquid separation and preventing the compressor from experiencing liquid slugging phenomenon.

[0066] The piston is disposed in the compression chamber.

[0067] An exhaust port is provided at the top of the housing assembly, and the exhaust port is used for delivering high-temperature and high-pressure refrigerant to the refrigeration system.

[0068] The stator winding can conduct electricity to drive the rotor core to rotate, and the rotor core drives the piston to rotate through the rotating shaft, so as to realize the compression, suction, compression, and exhaust of the refrigerant by the compressor. The silencer realizes the silencing process.

[0069] The third aspect of the present invention provides a refrigeration device, including the pump body of any one of the above technical solutions or the compressor of any one of the above technical solutions. Therefore, the refrigeration device has all the beneficial effects of the pump body of any one of the above technical solutions or the compressor of any one of the above technical solutions.

[0070] Specifically, the refrigeration device includes a refrigerator, an air conditioner, a freezer, a wine cabinet, or a display cabinet.

[0071] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0072] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0073] Figure 1 is one of the schematic structural diagrams of the pump body according to an embodiment of the present invention;

[0074] Figure 2 is the schematic structural diagram of the compressor according to an embodiment of the present invention;

[0075] Figure 3 is the schematic diagram of the change curve of the width of the notch relative to the oil level height according to an embodiment of the present invention;

[0076] Figure 4 is the schematic diagram of the change curve of the notch angle relative to the oil level height according to an embodiment of the present invention;

[0077] Figure 5 is another schematic structural diagram of the pump body according to an embodiment of the present invention;

[0078] Figure 6 is yet another schematic structural diagram of the pump body according to an embodiment of the present invention;

[0079] Figure 7Schematic diagram of the variation curve of the ratio of the first area to the second area with respect to the oil level height according to an embodiment of the present invention.

[0080] Among them, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names in

[0081] 100 Pump body, 110 Body, 120 Notch, 122 First notch, 124 Second notch, 130 Oil return passage, 200 Housing assembly, 210 Main housing, 220 Sealed housing, 300 Stator assembly, 310 Stator core, 400 Rotor assembly, 410 Rotor core, 420 Rotating shaft, 510 Piston, 520 Liquid reservoir, 530 Lower bearing, 540 Upper bearing, 550 Silencer. Detailed implementation manners

[0082] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0083] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0084] Next, refer to Figures 1 to 7 Describe the pump body 100, compressor and refrigeration equipment according to some embodiments of the present invention.

[0085] In an embodiment of the present invention, as Figure 1 and Figure 2 shown, a pump body 100 is provided. The pump body 100 is used for a compressor. The pump body 100 includes a body 110. The body 110 is provided with at least one notch 120 that penetrates the body 110 along the axial direction of the pump body 100. The oil in the compressor can flow back to the bottom of the compressor through the notch 120. Among them, on a radial section of the body 110, the intersection point of the axis L3 of the pump body 100 and the radial section is the first point P1. The point on the radial inner edge L1 of the notch 120 that is closest to the axis L3 of the pump body 100 is the second point P2. The diameter of the circle with the first point P1 as the center and passing through the second point P2 is the first diameter D1. The point on the radial outer edge L2 of the notch 120 that is farthest from the axis L3 of the pump body 100 is the third point P3. The diameter of the circle with the first point P1 as the center and passing through the third point P3 is the second diameter D2. The first diameter D1 and the second diameter D2 satisfy the following relationship: 10 mm ≤ (D2 - D1) / 2 ≤ 16 mm.

[0086] In this embodiment, the pump body 100 is used for a compressor, and the pump body 100 can cooperate with the piston 510 of the compressor to compress the refrigerant. The pump body 100 includes a body 110, and at least one notch 120 is provided in the body 110 and penetrates the body 110 along the axial direction of the pump body 100. After the refrigerant at the bottom of the pump body 100 is compressed by the cooperation of the pump body 100 and the piston 510, it flows towards the top of the compressor. After the refrigerant and the oil are separated at the top of the compressor, the refrigerant is discharged from the compressor through the exhaust port of the compressor, and the oil can flow back to the bottom of the compressor through the notch 120 and return to the oil sump, thereby realizing the return of the oil inside the compressor. On a radial section of the body 110, the point on the radial inner edge L1 of the notch 120 closest to the axis L3 of the pump body 100 is the second point P2, and the diameter of the circle with the first point P1 as the center and passing through the second point P2 is the first diameter D1, that is, the first diameter D1 is the diameter of the smallest inner circle of the notch 120; the point on the radial outer edge L2 of the notch 120 farthest from the axis L3 of the pump body 100 is the third point P3, and the diameter of the circle with the first point P1 as the center and passing through the third point P3 is the second diameter D2, that is, the second diameter D2 is the diameter of the largest outer circle of the notch 120; the first diameter D1 and the second diameter D2 satisfy the following relationship: 10 mm ≤ (D2 - D1) / 2 ≤ 16 mm, so that the width of the notch 120 is between 10 mm and 16 mm, improving the smoothness of the oil return inside the compressor, and further enabling the liquid level of the oil in the oil sump to be maintained at a certain height, so that the oil can lubricate the operation of the compressor more fully and improve the stability during the operation of the compressor.

[0087] When the compressor starts to work at a lower ambient temperature, a large amount of refrigerant is dissolved in the oil sump. After heating, the refrigerant in the oil sump flashes to generate a large amount of gas that flows upward through the notch 120. By setting half of the difference between the second diameter D2 and the first diameter D1 to be greater than or equal to 10 millimeters and less than or equal to 16 millimeters, that is, setting the width of the notch 120 to be greater than or equal to 10 millimeters and less than or equal to 16 millimeters, the probability that the upward-flowing gas contacts the oil flowing back through the notch 120 and generates bubbles is reduced, and further the probability of forming an oil film on the wall surface of the notch 120 is reduced. Since the width of the notch 120 is set between 10 mm and 16 mm, the probability of forming an oil film on the wall surface of the notch 120 can be reduced. Therefore, the phenomenon that the upward-flowing gas applies a drag force to the oil film and causes the oil to be unable to flow can be avoided. Furthermore, the impact of the upward-flowing gas on the oil flowing back through the notch 120 is reduced, the resistance of the oil flowing back through the notch 120 is reduced, and the influence of the upward-flowing gas on the oil return of the notch 120 is reduced.

[0088] One half of the difference between the second diameter D2 and the first diameter D1 is greater than or equal to 10 millimeters, that is, the width of the notch 120 is greater than or equal to 10 millimeters, increasing the width of the notch 120, thereby increasing the flow area of the notch 120, enhancing the oil return speed of the oil fluid, raising the liquid level of the oil fluid in the oil sump, and reducing the probability of the liquid level in the oil sump being too low; one half of the difference between the second diameter D2 and the first diameter D1 is less than or equal to 16 millimeters, that is, the width of the notch 120 is less than or equal to 16 millimeters, reducing the impact of the notch 120 on the strength of the pump body 100, maintaining the fitting accuracy between the pump body 100 and the piston 510, thereby enhancing the efficiency of the compressor and prolonging the service life of the compressor.

[0089] Specifically, as Figure 3 shown, set one half of the difference between the second diameter and the first diameter to be greater than or equal to 10 millimeters and less than or equal to 16 millimeters, that is, set the width of the notch 120 to be greater than or equal to 10 millimeters and less than or equal to 16 millimeters, so that the liquid level is maintained at a certain height. Especially when the compressor starts to work in a low-temperature environment, it is beneficial to increase the relative height of the lowest liquid level in the oil sump.

[0090] Specifically, on a radial section of the body 110, the point on the radial inner edge L1 of the notch 120 that is closest to the axis L3 of the pump body 100 is the second point P2. The center of the circle where the second point P2 is located coincides with the axis L3 of the compressor, and the diameter of the circle where the second point P2 is located is the first diameter D1. The radial inner edge L1 of the notch 120 is arc-shaped, and the center of the radial inner edge L1 of the notch 120 coincides with the axis L3 of the compressor, so the second point P2 is any point on the radial inner edge L1 of the notch 120.

[0091] On a radial section of the body 110, the point on the radial outer edge L2 of the notch 120 that is farthest from the axis L3 of the pump body 100 is the third point P3. The center of the circle where the third point P3 is located coincides with the axis L3 of the compressor, and the diameter of the circle where the third point P3 is located is the second diameter D2. The radial outer edge L2 of the notch 120 is arc-shaped, and the center of the radial outer edge L2 of the notch 120 coincides with the axis L3 of the compressor, so the third point P3 is any point on the radial outer edge L2 of the notch 120.

[0092] The circle where the second point P2 is located and the circle where the third point P3 is located are concentric circles.

[0093] Specifically, one half of the difference between the second diameter D2 and the first diameter D1 is 10 millimeters, that is, the width of the notch 120 is 10 millimeters.

[0094] One half of the difference between the second diameter D2 and the first diameter D1 is 16 millimeters, that is, the width of the notch 120 is 16 millimeters.

[0095] One half of the difference between the second diameter D2 and the first diameter D1 is 12 millimeters, that is, the width of the notch 120 is 12 millimeters.

[0096] One half of the difference between the second diameter D2 and the first diameter D1 is 14 millimeters, that is, the width of the notch 120 is 14 millimeters.

[0097] One half of the difference between the second diameter D2 and the first diameter D1 is 15 millimeters, that is, the width of the notch 120 is 15 millimeters.

[0098] Specifically, the notch 120 is provided on the outer peripheral edge of the body 110, and at least one side of the notch 120 is an opening. For example, the notch 120 can be a groove recessed from the circumferential side wall of the body 110 toward the compressor axis L3.

[0099] Specifically, the axial direction in this application is Figure 2 the direction shown by the arrow A in Figure 2 The radial direction in this application is Figure 1 the direction shown by the arrow B in

[0100] This embodiment provides a pump body 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0101] As Figure 1 shown, the number of the notches 120 is multiple, and the multiple notches 120 are arranged along the circumferential direction of the body 110.

[0102] In this embodiment, the number of the notches 120 is multiple, and the multiple notches 120 are arranged along the circumferential direction of the body 110, so that the multiple notches 120 are distributed in the circumferential direction of the body 110, avoiding the concentration of the notches 120 in the same area of the body 110, thereby reducing the influence of the notches 120 on the overall strength of the pump body 100, maintaining the fitting accuracy between the pump body 100 and the piston 510, thereby improving the efficiency of the compressor and prolonging the service life of the compressor. And the multiple notches 120 are distributed in the circumferential direction of the body 110, which can also increase the total flow area of the notches 120, thereby increasing the volume of the oil passing through the notches 120, accelerating the oil return speed, thereby increasing the liquid level of the oil in the oil sump and reducing the probability of the liquid level in the oil sump being too low.

[0103] Further, along the axial direction of the pump body 100, the radial cross-sectional area of the notch 120 can remain unchanged, or the radial cross-sectional area of the notch 120 can gradually increase or decrease.

[0104] This embodiment provides a pump body 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0105] AsFigure 1 As shown, on a radial section of the body 110, the angle α of the central angle corresponding to each of the multiple notches 120 is a first angle, and the sum of the first angles corresponding to the multiple notches 120 is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0106] In this embodiment, on a radial section of the body 110, the angle α of the central angle corresponding to each of the multiple notches 120 is a first angle, and the sum of the first angles corresponding to the multiple notches 120 is greater than or equal to 30 degrees, increasing the flow area of the notch 120, enhancing the oil return speed of the oil fluid, thereby raising the liquid level of the oil fluid in the oil sump and reducing the probability of the liquid level in the oil sump being too low. On a radial section of the body 110, the angle α of the central angle corresponding to each of the multiple notches 120 is a first angle, and the sum of the first angles corresponding to the multiple notches 120 is less than or equal to 60 degrees, reducing the impact of the notch 120 on the strength of the pump body 100, maintaining the fitting accuracy between the pump body 100 and the piston 510, thereby enhancing the efficiency of the compressor and extending the service life of the compressor.

[0107] Specifically, as Figure 4 shown, the sum of the first angles corresponding to the multiple notches 120 is set to be greater than or equal to 30 degrees and less than or equal to 60 degrees, enabling the liquid level to be maintained at a certain height. Especially when the compressor starts to operate in a low-temperature environment, it is beneficial to increase the relative height of the lowest liquid level in the oil sump.

[0108] Specifically, the sum of the first angles of the central angle α corresponding to the multiple notches 120 is 30 degrees.

[0109] The sum of the first angles of the central angle α corresponding to the multiple notches 120 is 40 degrees.

[0110] The sum of the first angles of the central angle α corresponding to the multiple notches 120 is 50 degrees.

[0111] The sum of the first angles of the central angle α corresponding to the multiple notches 120 is 60 degrees.

[0112] Specifically, each notch 120 corresponds to a first angle, and the sum of all the first angles corresponding to the notches 120 is the sum of the first angles corresponding to the multiple notches 120.

[0113] Specifically, as Figure 1 and Figure 2As shown, on a radial section of the body 110, the area corresponding to the notch 120 circumferentially includes a first edge L4 and a second edge L5. The first edge L4 and the outer peripheral edge L2 of the notch 120 have a first intersection point. The line connecting the first intersection point and the axis L3 of the pump body 100 is the first side of the central angle corresponding to the notch 120. The second edge L5 and the outer peripheral edge L2 of the notch 120 have a second intersection point. The line connecting the second intersection point and the axis L3 of the pump body 100 is the second side of the central angle corresponding to the notch 120. The angle between the first side of the central angle and the second side of the central angle can be used as the angle of the central angle corresponding to the notch 120.

[0114] The first edge L4 and the inner peripheral edge L1 of the notch 120 have a third intersection point. The line connecting the third intersection point and the axis L3 of the pump body 100 is the first side of the central angle corresponding to the notch 120. The second edge L5 and the inner peripheral edge L1 of the notch 120 have a fourth intersection point. The line connecting the fourth intersection point and the axis L3 of the pump body 100 is the second side of the central angle corresponding to the notch 120. The angle between the first side of the central angle and the second side of the central angle can also be used as the angle of the central angle corresponding to the notch 120.

[0115] Further, as Figure 2 and Figure 5 shown, the number of notches 120 is two, namely a first notch 122 and a second notch 124. The central angle corresponding to the first notch 122 is a first angle a1, and the central angle corresponding to the second notch 124 is a second angle a2. The sum of the angle of the first angle a1 and the angle of the second angle a2 is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0116] The angles of the central angles corresponding to the first notch 122 and the second notch 124 may be the same or different.

[0117] Further, the number of notches 120 is three, namely a first notch 122, a second notch 124 and a third notch. The central angle corresponding to the first notch 122 is a first angle, the central angle corresponding to the second notch 124 is a second angle, and the central angle corresponding to the third notch is a third angle. The sum of the angle of the first angle, the angle of the second angle and the angle of the third angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0118] The angles of the central angles corresponding to the first notch 122, the second notch 124 and the third notch may be the same or different.

[0119] This embodiment provides a pump body 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0120] The number of the notches 120 is one; on a radial section of the body 110, the central angle corresponding to the notch 120 is a second angle, and the second angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0121] In this embodiment, the number of the notches 120 is one, which is convenient for machining the pump body 100, thereby simplifying the machining process of the pump body 100 and reducing the machining difficulty of the pump body 100. On a radial section of the body 110, the central angle corresponding to the notch 120 is a second angle, and the second angle is greater than or equal to 30 degrees, increasing the flow area of the notch 120, improving the oil return speed of the oil fluid, thereby raising the liquid level of the oil fluid in the oil sump and reducing the probability of the liquid level in the oil sump being too low. On a radial section of the body 110, the central angle corresponding to the notch 120 is a second angle, and the second angle is less than or equal to 60 degrees, reducing the influence of the notch 120 on the strength of the pump body 100, maintaining the fitting accuracy between the pump body 100 and the piston 510, thereby improving the efficiency of the compressor and prolonging the service life of the compressor.

[0122] Specifically, the central angle corresponding to the notch 120 is 30 degrees.

[0123] The central angle corresponding to the notch 120 is 40 degrees.

[0124] The central angle corresponding to the notch 120 is 50 degrees.

[0125] The central angle corresponding to the notch 120 is 60 degrees.

[0126] This embodiment provides a pump body 100. In addition to the technical features of the above embodiment, this embodiment further includes the following technical features.

[0127] As Figure 1 and Figure 2 shown, the body 110 is provided with an oil return channel 130, and the oil return channel 130 penetrates through the body 110 along the axial direction of the pump body 100.

[0128] In this embodiment, the oil return channel 130 is provided on the body 110, and the oil return channel 130 can further accelerate the oil return speed of the oil fluid.

[0129] Further, a narrow edge is provided on the outer peripheral edge of the oil return channel 130, that is, the narrow edge and the body 110 enclose the oil return channel 130.

[0130] This embodiment provides a pump body 100. In addition to the technical features of the above embodiment, this embodiment further includes the following technical features.

[0131] As Figure 2 and Figure 6As shown in the figure, the pump body 100 is projected axially along the pump body 100, and the area of the projection area corresponding to the oil return channel 130 ( Figure 6 the area indicated by arrow E in) is the first area, and the area of the projection area corresponding to the incision 120 ( Figure 6 the area indicated by arrow F in) is the second area. The ratio of the first area to the second area is greater than or equal to 0.8 and less than or equal to 3.

[0132] In this embodiment, the ratio of the first area to the second area is greater than or equal to 0.8 and less than or equal to 3, so that the oil return channel 130 has a certain oil return area, preventing the influence on the oil return to the oil sump during the steady operation of the compressor.

[0133] Specifically, as Figure 7 shown, setting the ratio of the first area to the second area to be greater than or equal to 0.8 and less than or equal to 3 keeps the liquid level at a certain height. Especially after the compressor operates stably, it is beneficial to raise the liquid level of the oil sump.

[0134] Specifically, the ratio of the first area to the second area is 0.8.

[0135] The ratio of the first area to the second area is 1.

[0136] The ratio of the first area to the second area is 1.5.

[0137] The ratio of the first area to the second area is 2.

[0138] The ratio of the first area to the second area is 3.

[0139] Specifically, the pump body 100 is projected axially along the pump body 100, and the area enclosed by the projection formed by the edge of the oil return channel 130 on the projection plane is the projection area corresponding to the oil return channel 130.

[0140] The pump body 100 is projected axially along the pump body 100, and the area enclosed by the projection formed by the edge of the incision 120 on the projection plane is the projection area corresponding to the incision 120.

[0141] This embodiment provides a pump body 100. In addition to the technical features of the above embodiment, this embodiment further includes the following technical features.

[0142] As Figure 1 and Figure 5 shown, the number of incisions 120 is multiple, the number of oil return channels 130 is multiple, and the multiple oil return channels 130 and the multiple incisions 120 are alternately arranged.

[0143] In this embodiment, a plurality of oil return channels 130 and a plurality of notches 120 are arranged alternately, so that the oil return channels 130 and the notches 120 are more evenly distributed in the circumferential direction of the body 110, thereby reducing the probability of local accumulation of oil in the body 110, further improving the oil return efficiency of the oil, and increasing the liquid level of the oil in the oil sump.

[0144] This embodiment provides a pump body 100. In addition to the technical features of the above embodiment, this embodiment further includes the following technical features.

[0145] In a radial cross-section of the body 110, the notch 120 is circular, semi-circular or polygonal.

[0146] In this embodiment, in a radial cross-section of the body 110, the notch 120 is circular, semi-circular or polygonal, so that the oil flows more smoothly through the notch 120.

[0147] Specifically, the polygon can be a rectangle, a square, a triangle, a rhombus, a parallelogram, a pentagon or a hexagon.

[0148] The second aspect of the present invention provides a compressor, including the pump body 100 of any of the above embodiments. Therefore, the compressor has all the beneficial effects of the pump body 100 of any of the above embodiments.

[0149] This embodiment provides a compressor. In addition to the technical features of the above embodiment, this embodiment further includes the following technical features.

[0150] As Figure 2 shown, the compressor further includes a housing assembly 200, a stator assembly 300, a rotor assembly 400 and a piston 510. The stator assembly 300 is disposed in the housing assembly 200; the rotor assembly 400 is disposed in the stator assembly 300; the piston 510 is disposed in the pump body 100 and is connected to the rotor assembly 400.

[0151] In this embodiment, the stator assembly 300 is disposed in the housing assembly 200, the rotor assembly 400 is disposed in the stator assembly 300, the piston 510 is disposed in the pump body 100 and is connected to the rotor assembly 400, so that the stator assembly 300 can drive the piston 510 to work through the rotor assembly 400, thereby realizing the compression of the refrigerant.

[0152] Further, the stator assembly 300 includes a stator core 310 and a stator winding. The stator winding is disposed on the stator core 310. The rotor assembly 400 includes a rotor core 410 and a rotating shaft 420. The rotor core 410 is disposed in the stator core 310. The rotating shaft 420 passes through the rotor core 410. The stator winding can drive the rotor core 410 to rotate, and the rotor core 410 can drive the rotating shaft 420 to rotate.

[0153] Furthermore, the compressor further includes a liquid receiver 520, a lower bearing 530, an upper bearing 540, and a muffler 550.

[0154] The pump body 100 is disposed between the upper bearing 540 and the lower bearing 530.

[0155] The housing assembly 200 includes a main housing 210 and a sealing housing 220. The stator assembly 300, the rotor assembly 400, and the pump body 100 are disposed within the main housing 210, and the sealing housing 220 is fastened to the main housing 210.

[0156] The liquid receiver 520 is connected to the compression chamber of the pump body 100, and the liquid receiver 520 is used for gas-liquid separation and preventing liquid hammer phenomenon of the compressor.

[0157] The piston 510 is disposed within the compression chamber.

[0158] An exhaust port is provided at the top of the housing assembly 200, and the exhaust port is used for delivering high-temperature and high-pressure refrigerant to the refrigeration system.

[0159] The stator winding can conduct electricity to drive the rotor core 410 to rotate, and the rotor core 410 drives the piston 510 to rotate through the rotating shaft 420, so as to realize the compression, suction, compression, and exhaust of the refrigerant by the compressor. The muffler 550 realizes the silencing process.

[0160] The third aspect of the present invention provides a refrigeration device, including the pump body 100 of any of the above embodiments or the compressor of any of the above embodiments. Therefore, the refrigeration device has all the beneficial effects of the pump body 100 of any of the above embodiments or the compressor of any of the above embodiments.

[0161] Specifically, the refrigeration device includes a refrigerator, an air conditioner, a freezer, a wine cabinet, or a display cabinet.

[0162] In the claims, the description, and the drawings of the present invention, the term "a plurality" means two or more, unless otherwise explicitly defined. The orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for more convenient description of the present invention and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation, be constructed and operated in the specific orientation. Therefore, these descriptions should not be construed as limitations on the present invention; the terms "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances of the above data.

[0163] In the claims, the specification and the drawings of the present invention, the descriptions of the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, the specification and the drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0164] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pump body, characterized in that, The pump body is for a compressor, and the pump body includes: A body, the body is provided with at least one notch penetrating the body along the axial direction of the pump body, and the oil in the compressor can flow back to the bottom of the compressor through the notch; Wherein, on a radial section of the body, the intersection point of the axis of the pump body and the radial section is the first point, and the point on the radial inner edge of the notch closest to the axis of the pump body is the second point. The diameter of the circle with the first point as the center and passing through the second point is the first diameter D1. The point on the radial outer edge of the notch farthest from the axis of the pump body is the third point. The diameter of the circle with the first point as the center and passing through the third point is the second diameter D2. The first diameter D1 and the second diameter D2 satisfy the following relationship: 10mm ≤ (D2 - D1) / 2 ≤ 16mm.

2. The pump body according to claim 1, characterized in that, The number of the notches is multiple, and the multiple notches are arranged along the circumferential direction of the body.

3. The pump body according to claim 2, wherein, On a radial section of the body, the angle of the central angle corresponding to each notch among the multiple notches is the first angle, and the sum of the first angles corresponding to the multiple notches is greater than or equal to 30 degrees and less than or equal to 60 degrees.

4. The pump body according to claim 1, characterized in that, The number of the notches is one; On a radial section of the body, the angle of the central angle corresponding to the notch is the second angle, and the second angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

5. The pump body according to claim 1, characterized in that, The body is provided with an oil return channel, and the oil return channel penetrates the body along the axial direction of the pump body.

6. The pump body according to claim 5, characterized in that, Projecting the pump body along the axial direction of the pump body, the area of the projection region corresponding to the oil return channel is the first area, and the area of the projection region corresponding to the notch is the second area. The ratio of the first area to the second area is greater than or equal to 0.8 and less than or equal to 3.

7. The pump body according to claim 5, characterized in that, The number of the notches is multiple, and the number of the oil return channels is multiple. The multiple oil return channels and the multiple notches are arranged alternately.

8. The pump body according to any one of claims 1 to 7, characterized in that, On a radial section of the body, the notch is circular, semi-circular or polygonal.

9. A compressor, characterized in that, Including the pump body according to any one of claims 1 to 8.

10. The compressor according to claim 9, characterized in that, The compressor further includes: A housing assembly; A stator assembly, the stator assembly is arranged in the housing assembly; A rotor assembly, the rotor assembly is arranged in the stator assembly; A piston, the piston is arranged in the pump body and is connected to the rotor assembly.

11. A refrigeration device, characterized in that, Including: The pump body according to any one of claims 1 to 8; Or The compressor according to claim 9 or 10.

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