Pump body assembly, compressor and refrigeration equipment

Abstract

The utility model discloses a pump body assembly, a compressor and refrigeration equipment, and relates to the technical field of compressors. The pump body assembly comprises an air cylinder device, a crankshaft, an upper bearing, a lower bearing, an upper silencing device and a lower silencing device, the air cylinder device is provided with an exhaust channel penetrating through the upper end and the lower end of the air cylinder device, the crankshaft is rotationally connected with the air cylinder device, and the upper bearing is connected to the upper end of the air cylinder device and provided with a first air outlet hole; the lower bearing is connected to the lower end of the air cylinder device and provided with an air inlet hole communicated with the exhaust channel, and the upper silencing device and the lower silencing device are connected to the upper bearing and the lower bearing respectively. The groove is formed in at least one of the upper end face of the upper bearing and the lower end face of the lower bearing and extends to the inner wall of the corresponding air inlet hole or the first air outlet hole, so that the exhaust area of the air inlet hole or the first air outlet hole can be enlarged, the resistance of refrigerant movement can be effectively reduced, and the exhaust efficiency can be improved; and the flow loss of the refrigerant is reduced.

Description

Technical Field

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

[0002] The pump assembly of the compressor is used to compress the refrigerant, turning the refrigerant into a high-temperature and high-pressure gas. The pump assembly in the related art is provided with multiple cylinders to compress the refrigerant to improve the compression efficiency. For this purpose, the pump assembly needs to be provided with an exhaust channel to guide the direction of the refrigerant. In order to reduce the exhaust noise of the pump assembly, the compressor is usually provided with a muffler cover arranged at the air outlet of the pump assembly. The muffler will hinder the exhaust of the exhaust channel, resulting in reduced exhaust efficiency and increased flow loss of the refrigerant. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a pump body assembly, which can improve the exhaust efficiency of the refrigerant and reduce the flow loss of the refrigerant.

[0004] The utility model also provides a compressor and a refrigeration device having the pump body assembly.

[0005] The pump assembly according to the first embodiment of the utility model comprises: a cylinder device provided with at least one exhaust passage, the exhaust passage passing through the upper and lower ends of the cylinder device;

[0006] a crankshaft, rotatably connected to the cylinder device;

[0007] An upper bearing, sleeved on the crankshaft and connected to the upper end of the cylinder device, the upper bearing being provided with a first air outlet hole communicating with the upper end of the exhaust passage;

[0008] An upper muffler device is sleeved on the crankshaft and connected to the upper bearing, and a first muffler cavity communicating with the first air outlet is formed between the upper muffler device and the upper bearing;

[0009] A lower bearing, sleeved on the crankshaft and connected to the lower end of the cylinder device, the lower bearing being provided with an air inlet hole communicating with the lower end of the exhaust passage;

[0010] A lower silencer connected to the lower bearing, wherein a second silencer cavity communicating with the air inlet is formed between the lower silencer and the lower bearing;

[0011] Wherein, at least one of the lower end surface of the lower bearing and the upper end surface of the upper bearing is provided with a groove, and the groove extends to the inner wall of the corresponding air inlet hole or the first air outlet hole.

[0012] The pump assembly according to the embodiment of the utility model has at least the following beneficial effects:

[0013] By setting an exhaust passage running through the upper and lower ends of the cylinder device in the cylinder device, the crankshaft and the cylinder device are rotatably connected to compress the refrigerant, the upper bearing is connected to the upper end of the cylinder device and is provided with a first air outlet connected to the exhaust passage, the lower bearing is connected to the lower end of the cylinder device and is provided with an air inlet connected to the exhaust passage, and the upper muffler device and the lower muffler device are respectively connected to the upper bearing and the lower bearing to reduce the exhaust noise of the cylinder device. When the crankshaft and the cylinder device cooperate to compress the refrigerant, at least part of the refrigerant is discharged from the cylinder device to the second muffler chamber, and then passes through the air inlet, the exhaust passage, the first air outlet and the first muffler chamber in sequence, and finally discharged from the pump body assembly. By setting a groove in at least one of the upper end surface of the upper bearing and the lower end surface of the lower bearing, the groove extends to the inner wall of the corresponding air inlet or the first air outlet, so that the exhaust area of ​​the air inlet or the first air outlet can be expanded, and the resistance of the refrigerant movement can be effectively reduced, thereby improving the exhaust efficiency and reducing the flow loss of the refrigerant.

[0014] According to some embodiments of the utility model, the upper end surface of the upper bearing is provided with at least one groove, the groove located on the upper end surface of the upper bearing is a first groove, and the number of the first grooves is the same as the number of the first air outlet holes;

[0015] On the projection plane perpendicular to the rotation axis of the crankshaft, the projection of the first groove is outside the projection of the contour line of the first air outlet, and the sum of the areas of the projections of all the first grooves is S3. The upper silencer device includes a first positioning portion, and the first positioning portion and the upper end surface of the upper bearing are abutted and positioned. The area of ​​the first air outlet blocked by the first positioning portion is S7, satisfying: S3≥S7.

[0016] According to some embodiments of the utility model, the lower end surface of the lower bearing is provided with at least one groove, the groove located on the lower end surface of the lower bearing is a second groove, and the number of the second grooves is the same as the number of the air inlet holes;

[0017] On the projection plane perpendicular to the rotation axis of the crankshaft, the projection of the second groove is outside the projection of the contour line of the air intake hole, and the sum of the projection areas of all the second grooves is S2. The lower silencer device includes a second positioning portion, and the second positioning portion and the lower end surface of the lower bearing are abutted and positioned. The area of ​​the air intake hole blocked by the second positioning portion is S6, satisfying: S2≥S6.

[0018] According to some embodiments of the utility model, the lower end surface of the lower bearing and the upper end surface of the upper bearing are both provided with the groove, the groove located on the lower end surface of the lower bearing is the second groove, the second groove is connected to the air inlet hole, and the groove located on the upper end surface of the upper bearing is the first groove, the first groove is connected to the first air outlet hole.

[0019] According to some embodiments of the present invention, the maximum depth of the first groove is h1, and the maximum depth of the first air outlet is h2, which satisfies: 1 / 3≤h1 / h2≤2 / 3;

[0020] And / or the maximum depth of the second groove is h3, the maximum depth of the air inlet hole is h4, and the following relationship is satisfied: 1 / 3≤h3 / h4≤2 / 3.

[0021] According to some embodiments of the present invention, the bottom wall of the first groove is a plane;

[0022] Alternatively, the side wall of the first groove is an inclined surface and extends to the upper end surface of the upper bearing and the side wall of the first air outlet;

[0023] Alternatively, the top wall of the second groove is a plane;

[0024] Alternatively, the side wall of the second groove is an inclined surface and extends to the lower end surface of the lower bearing and the side wall of the air inlet hole.

[0025] According to some embodiments of the utility model, the sum of the minimum exhaust areas of all the exhaust channels is S1, the upper silencer device includes a first silencer and a second silencer, the first silencer is connected to the upper bearing, the second silencer cover is arranged on the first silencer, the first silencer is provided with at least one second air outlet, the sum of the minimum exhaust areas of all the second air outlets is S5, the second silencer is provided with at least one third air outlet, the sum of the minimum exhaust areas of all the third air outlets is S4, satisfying: S5≥S1+S4.

[0026] According to some embodiments of the utility model, the upper bearing includes a limiting portion extending upward, the limiting portion passes through the first muffler and the second muffler, the second air outlet is formed between the first muffler and the limiting portion, and the third air outlet is formed between the second muffler and the limiting portion.

[0027] According to some embodiments of the utility model, the cylinder device includes a first cylinder, a second cylinder and a partition, the first cylinder is connected to the upper end surface of the partition, the second cylinder is connected to the lower end surface of the partition, and the exhaust channel runs through the first cylinder, the partition and the second cylinder.

[0028] The compressor according to the second embodiment of the utility model comprises the pump body assembly described in the above embodiment.

[0029] The compressor according to the embodiment of the utility model has at least the following beneficial effects:

[0030] By adopting the pump body assembly of the first aspect embodiment, the pump body assembly is provided with an exhaust passage running through the upper and lower ends of the cylinder device in the cylinder device, the crankshaft and the cylinder device are rotatably connected to compress the refrigerant, the upper bearing is connected to the upper end of the cylinder device, and is provided with a first air outlet hole connected to the exhaust passage, the lower bearing is connected to the lower end of the cylinder device and is provided with an air inlet hole connected to the exhaust passage, and the upper muffler device and the lower muffler device are respectively connected to the upper bearing and the lower bearing to reduce the exhaust noise of the cylinder device. When the crankshaft and the cylinder device cooperate to compress the refrigerant, at least part of the refrigerant is discharged from the cylinder device to the second muffler cavity, and then passes through the air inlet hole, the exhaust passage, the first air outlet hole and the first muffler cavity in sequence, and finally discharged from the pump body assembly. By providing a groove in at least one of the upper end surface of the upper bearing and the lower end surface of the lower bearing, the groove extends to the inner wall of the corresponding air inlet hole or the first air outlet hole, so that the exhaust area of ​​the air inlet hole or the first air outlet hole can be expanded, and the resistance of the refrigerant movement can be effectively reduced, thereby improving the exhaust efficiency and reducing the flow loss of the refrigerant.

[0031] The refrigeration device according to the embodiment of the third aspect of the utility model comprises the compressor described in the above embodiment.

[0032] The refrigeration device according to the embodiment of the utility model has at least the following beneficial effects:

[0033] By adopting the compressor of the second aspect embodiment, the pump body assembly of the compressor is provided with an exhaust passage running through the upper and lower ends of the cylinder device in the cylinder device, the crankshaft and the cylinder device are rotatably connected to compress the refrigerant, the upper bearing is connected to the upper end of the cylinder device, and is provided with a first air outlet hole connected to the exhaust passage, the lower bearing is connected to the lower end of the cylinder device and is provided with an air inlet hole connected to the exhaust passage, and the upper muffler device and the lower muffler device are respectively connected to the upper bearing and the lower bearing to reduce the exhaust noise of the cylinder device. When the crankshaft and the cylinder device cooperate to compress the refrigerant, at least part of the refrigerant is discharged from the cylinder device to the second muffler cavity, and then passes through the air inlet hole, the exhaust passage, the first air outlet hole and the first muffler cavity in sequence, and finally discharged from the pump body assembly. By providing a groove in at least one of the upper end surface of the upper bearing and the lower end surface of the lower bearing, the groove extends to the inner wall of the corresponding air inlet hole or the first air outlet hole, so that the exhaust area of ​​the air inlet hole or the first air outlet hole can be expanded, and the resistance of the refrigerant movement can be effectively reduced, thereby improving the exhaust efficiency and reducing the flow loss of the refrigerant.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0036] Figure 1 It is a cross-sectional schematic diagram of a pump body assembly of an embodiment of the utility model;

[0037] Figure 2 It is a top view schematic diagram of an upper bearing of an embodiment of the utility model;

[0038] Figure 3 The pump body component of an embodiment of the utility model is Figure 1 Sectional view at AA in the middle;

[0039] Figure 4 It is a bottom view schematic diagram of a lower bearing of an embodiment of the utility model;

[0040] Figure 5 The pump body component of an embodiment of the utility model is Figure 1 Sectional view at the middle BB;

[0041] Figure 6 It is a cross-sectional view of an upper bearing of an embodiment of the utility model;

[0042] Figure 7 It is a cross-sectional view of a lower bearing according to an embodiment of the utility model.

[0043] Reference numerals:

[0044] Pump body assembly 1000;

[0045] Cylinder device 100; exhaust passage 101; crankshaft 110; first piston 111; second piston 112; first cylinder 120; first compression chamber 121; second cylinder 130; second compression chamber 131; partition 140;

[0046] Upper bearing 200; first groove 210; first air outlet 220; limiting portion 230;

[0047] Upper silencer 300; first silencer 310; second air outlet 311; second silencer 320; third air outlet 321; first positioning portion 322; first silencer chamber 330;

[0048] Lower bearing 400; second groove 410; air inlet 420;

[0049] Lower silencer 500 ; second silencer chamber 510 ; second positioning portion 520 . DETAILED DESCRIPTION

[0050] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0051] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0052] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0053] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0054] The pump body assembly of the compressor is used to compress the refrigerant, turning the refrigerant into a high-temperature and high-pressure gas. The pump body assembly in the related art is provided with multiple cylinders to compress the refrigerant to improve the compression efficiency. For this purpose, the pump body assembly needs to be provided with an exhaust passage to guide the direction of the refrigerant. In order to reduce the exhaust noise of the pump body assembly, the compressor is usually provided with a muffler cover disposed at the air outlet of the pump body assembly. Due to the miniaturized design of the existing compressor, the structure is relatively compact, and a certain sealing performance must be ensured between the muffler and the pump body assembly. For this reason, the muffler will cover part of the outlet of the exhaust passage, hindering the exhaust of the exhaust passage, resulting in reduced exhaust efficiency and increased flow loss of the refrigerant.

[0055] For this purpose, refer to Figure 1As shown, a pump body assembly 1000 of an embodiment of the utility model can be used in a compressor to compress refrigerant. The pump body assembly 1000 of the embodiment of the utility model includes a cylinder device 100, a crankshaft 110, an upper bearing 200, an upper silencer 300, a lower bearing 400 and a lower silencer 500. The cylinder device 100 is provided with an exhaust passage 101, and the exhaust passage 101 extends in the vertical direction and passes through the upper and lower ends of the cylinder device 100. The crankshaft 110 is rotatably connected to the cylinder device 100. When the crankshaft 110 rotates under the drive of the motor, the refrigerant inside the cylinder device 100 can be compressed, and part of the compressed refrigerant is discharged through the exhaust passage 101.

[0056] Continue to refer to Figure 1 As shown, the upper bearing 200 is sleeved on the crankshaft 110 and connected to the upper end of the cylinder device 100. The upper bearing 200 is used to limit the position of the crankshaft 110, thereby improving the reliability and stability of the crankshaft 110 when rotating. The upper bearing 200 is provided with at least one first air outlet 220. The number of the first air outlet 220 is the same as the number of the exhaust channel 101 and is connected to the upper end of the corresponding exhaust channel 101. The upper muffler 300 is sleeved on the crankshaft 110 and connected to the upper bearing 200. A first muffler cavity 330 is formed between the upper muffler 300 and the upper bearing 200. The first muffler cavity 330 is connected to the first air outlet 220. The lower bearing 400 is sleeved on the crankshaft 110 and connected to the lower end of the cylinder device 100. The lower bearing 400 is also used to limit the position of the crankshaft 110, thereby further improving the smoothness and stability of the crankshaft 110 when rotating. The lower bearing 400 is provided with at least one air inlet hole 420, the number of which is the same as the number of the exhaust passages 101, and the air inlet hole 420 is connected to the lower end of the corresponding exhaust passage 101. The upper muffler 300 and the lower muffler 500 are used to reduce the exhaust noise of the cylinder device 100 to improve the user experience.

[0057] Among them, at least one of the lower end surface of the lower bearing 400 and the upper end surface of the upper bearing 200 is provided with a groove, the groove extends to the inner wall of the corresponding air inlet hole 420 or the first air outlet hole 220, and the groove is connected to the corresponding air inlet hole 420 or the first air outlet hole 220. For example, the groove can be provided only on the lower end surface of the lower bearing 400, or only on the upper end surface of the upper bearing 200, or both on the upper bearing 200 and the lower bearing 400.

[0058] It is understandable that when the crankshaft 110 and the cylinder device 100 cooperate to compress the refrigerant, part of the refrigerant is discharged from the cylinder device 100 to the second muffler chamber 510, and then passes through the air inlet 420, the exhaust channel 101, the first air outlet 220 and the first muffler chamber 330 in sequence, and finally discharged from the pump body assembly 1000, for example Figure 1The dotted line shows the flow direction of the refrigerant. Another part of the refrigerant is directly discharged into the first muffler chamber 330, and finally discharged from the pump body assembly 1000. By providing a groove on at least one of the upper end surface of the upper bearing 200 and the lower end surface of the lower bearing 400, the groove is connected to the corresponding air inlet hole 420 or the first air outlet hole 220, which can expand the area of ​​the air inlet hole 420 or the first air outlet hole 220, and can effectively reduce the resistance of the refrigerant movement, thereby improving the exhaust efficiency and reducing the flow loss of the refrigerant.

[0059] It should be noted that in the formula: d = 0.0408*√(Q / V), d represents the inner diameter of the exhaust channel 101; Q represents the flow rate of the refrigerant; and V represents the flow velocity of the refrigerant. According to the above formula, the flow velocity v of the refrigerant is negatively correlated with the inner diameter d of the exhaust channel 101. Therefore, by increasing the area of ​​the air inlet 420 or the first air outlet 220, the flow velocity of the refrigerant can be reduced, thereby reducing the resistance entering the exhaust channel 101 and the resistance exiting the exhaust channel 101, so as to improve the exhaust efficiency of the refrigerant.

[0060] Reference Figure 2 As shown, in an embodiment of the utility model, the upper end surface of the upper bearing 200 and the lower end surface of the lower bearing 400 are both provided with grooves. For the convenience of explanation, the groove located on the upper end surface of the upper bearing 200 is referred to as the first groove 210, and the groove located on the lower end surface of the lower bearing 400 is referred to as the second groove 410. Among them, the upper end surface of the upper bearing 200 is provided with at least one first groove 210, and the number of the first grooves 210 is the same as the number of the first air outlet holes 220, and the first grooves 210 are connected to the corresponding first air outlet holes 220. For example, the number of the first grooves 210 and the number of the first air outlet holes 220 are both one, two or three, etc. On the projection plane perpendicular to the axis of rotation of the crankshaft 110, the projection of the first groove 210 is outside the projection of the contour line of the first air outlet hole 220, and the sum of the projection areas of all the first grooves 210 is S3, for example Figure 2 It should be noted that the projection of the first groove 210 refers to the contour of the first groove 210 located at the upper end surface of the upper bearing 200 , and the area S3 does not include the area of ​​the first air outlet 220 .

[0061] Reference Figure 1 and Figure 3 As shown, the upper muffler 300 includes a first positioning portion 322, and the first positioning portion 322 is abutted against the upper end surface of the upper bearing 200 for positioning, thereby limiting the relative position between the upper muffler 300 and the upper bearing 200, and improving the convenience of installation. Among them, the first positioning portion 322 will block part of the structure of the first air outlet 220, and the area of ​​the first positioning portion 322 blocking all the first air outlet 220 is S7, and the blocked part of the first air outlet 220 is as shown in FIG. Figure 3As shown by the grid lines in the figure, it satisfies: S3≥S7.

[0062] It is understandable that the first groove 210 and the first air outlet 220 are connected, which is equivalent to increasing the exhaust area of ​​the first air outlet 220. When S3 is less than S7, the increased exhaust area of ​​the first air outlet 220 is less than the area blocked by the first positioning portion 322, which will cause the exhaust area of ​​the first air outlet 220 to decrease, thereby increasing the discharge resistance of the refrigerant and reducing the exhaust efficiency of the refrigerant. To this end, by setting S3≥S7, that is, the increased exhaust area of ​​the first air outlet 220 is greater than or equal to the area blocked by the first positioning portion 322, the resistance of the refrigerant exhaust passage 101 can be effectively reduced, thereby improving the exhaust efficiency.

[0063] Reference Figure 4 As shown, in the embodiment of the present invention, the lower end surface of the lower bearing 400 is provided with at least one second groove 410, the number of the second grooves 410 is the same as the number of the air inlet holes 420, and the second grooves 410 are connected to the corresponding air inlet holes 420. For example, the number of the second grooves 410 and the number of the air inlet holes 420 are one, two or three. On the projection plane perpendicular to the rotation axis of the crankshaft 110, the projection of the second grooves 410 is outside the projection of the contour line of the air inlet hole 420, and the sum of the projection areas of all the second grooves 410 is S2, for example Figure 4 It should be noted that the outermost projection contour line of the second groove 410 refers to the contour of the second groove 410 at the lower end surface of the lower bearing 400 , and the area S2 does not include the area of ​​the air inlet 420 .

[0064] Reference Figure 1 and Figure 5 As shown, the lower muffler 500 includes a second positioning portion 520, and the second positioning portion 520 is abutted against the lower end surface of the lower bearing 400 for positioning, thereby limiting the relative position between the lower muffler 500 and the lower bearing 400, and improving the convenience of installation. Among them, the second positioning portion 520 will block part of the structure of the air inlet 420, and the area of ​​the part of the second positioning portion 520 that blocks all the air inlet 420 is S6, and the part of the air inlet 420 that is blocked is as shown in FIG. Figure 5 As shown by the grid lines in the figure, it satisfies: S2≥S6.

[0065] It is understandable that the second groove 410 is connected to the air inlet 420, which is equivalent to increasing the air inlet area of ​​the air inlet 420. When S2 is less than S6, the area of ​​the air inlet 420 blocked by the second positioning portion 520 is larger than the increased air inlet area of ​​the air inlet 420, which easily leads to an increase in the air inlet resistance of the refrigerant and a decrease in the exhaust efficiency of the refrigerant. Therefore, by setting S2 to be greater than or equal to S6, it can be ensured that the increased air inlet area of ​​the air inlet 420 is greater than or equal to the area blocked by the second positioning portion 520, which is conducive to the refrigerant entering the exhaust channel 101 through the air inlet 420, reducing the movement resistance of the refrigerant and improving the exhaust efficiency.

[0066] Reference Figure 6 As shown, in the embodiment of the utility model, along the axial direction of the crankshaft 110, the maximum depth of the first groove 210 is h1, and the maximum depth of the first air outlet 220 is h2, which satisfies: 1 / 3≤h1 / h2≤2 / 3, for example, the value of h1 / h2 can be 1 / 3, 1 / 5, 1 / 2, 3 / 5, 2 / 3, etc. When the value of h1 / h2 is less than 1 / 3, the maximum depth h1 of the first groove 210 is too shallow, and it is difficult to increase the exhaust area of ​​the first air outlet 220, resulting in a large movement resistance of the refrigerant. When the value of h1 / h2 is greater than 2 / 3, the maximum depth of the first groove 210 is too deep, which easily leads to a decrease in the overall strength of the upper bearing 200, resulting in a decrease in the reliability of the pump body assembly 1000. Therefore, by reasonably designing the value range of h1 / h2 within the range of 1 / 3 to 2 / 3, the exhaust area of ​​the first air outlet 220 can be effectively increased while ensuring that the upper bearing 200 has a certain strength, thereby improving the reliability and stability of the upper bearing 200.

[0067] Reference Figure 7 As shown, in the embodiment of the utility model, along the axial direction of the crankshaft 110, the maximum depth of the second groove 410 is h3, and the maximum depth of the air inlet 420 is h3, which satisfies: 1 / 3≤h3 / h4≤2 / 3, for example, the value of h3 / h4 can be 1 / 3, 1 / 5, 1 / 2, 3 / 5, 2 / 3, etc. When the value of h3 / h4 is less than 1 / 3, the maximum depth of the second groove 410 is shallow, and it is difficult to effectively increase the air inlet area of ​​the air inlet 420, resulting in an increase in the movement resistance of the refrigerant. When the value of h3 / h4 is greater than 2 / 3, that is, the maximum depth of the second groove 410 is large, it is easy to reduce the overall strength of the lower bearing 400, and may cause the lower bearing 400 to deform, bend, and other adverse effects. Therefore, by reasonably designing the value range of h3 / h4 to be within the range of 1 / 3 to 2 / 3, the exhaust area of ​​the air inlet 420 can be effectively increased, while ensuring that the lower bearing 400 has a suitable strength, thereby improving the reliability and stability of the lower bearing 400.

[0068] Reference Figure 1As shown, in the embodiment of the utility model, the shape of the first groove 210 and the second groove 410 can be a sinking groove or a beveled hole. For example, the first groove 210 is a sinking groove, and the bottom wall of the first groove 210 is a plane. The second groove 410 is a beveled hole, and the side wall of the second groove 410 extends to the lower end surface of the lower bearing 400 and the side wall of the air inlet 420. The above scheme can effectively increase the area of ​​the air inlet 420 and the first air outlet 220. As an alternative embodiment, the first groove 210 can also be a beveled hole, and the side wall of the first groove 210 extends to the lower end surface of the upper bearing 200 and the inner wall of the first air outlet 220; the second groove 410 is a sinking groove, and the top wall of the second groove 410 is a plane. In other embodiments, the first groove 210 and the second groove 410 are both sinking grooves; or, the first groove 210 and the second groove 410 are both beveled holes.

[0069] Reference Figure 1 As shown, in the embodiment of the utility model, the upper silencer 300 includes a first silencer 310 and a second silencer 320, the first silencer 310 is connected to the upper end of the upper bearing 200, and the second silencer 320 is covered on the first silencer 310. The first silencer 310 is provided with at least one second air outlet 311, for example, the number of the second air outlet 311 is one, two, three, etc. The second silencer 320 is provided with at least one third air outlet 321, for example, the number of the third air outlet 321 is one, two, three, etc. The upper bearing 200 includes a limit portion 230 extending upward, and the limit portion 230 passes through the first air outlet 220 and the second air outlet 311. The space enclosed by the first silencer 310 and the second silencer 320 together constitutes a first silencer chamber 330, and the refrigerant in the first silencer chamber 330 passes through the second air outlet 311 and the third air outlet 321 in sequence, and finally discharges the pump body assembly 1000. It is understandable that by providing the first muffler 310 and the second muffler 320 , the muffler effect can be further improved, the noise of the pump body assembly 1000 can be reduced, and the user experience can be improved.

[0070] Reference Figure 1As shown, in the embodiment of the utility model, the cylinder device 100 includes a first cylinder 120, a second cylinder 130 and a partition 140, the first cylinder 120 is connected to the upper end surface of the partition 140, the second cylinder 130 is connected to the lower end surface of the partition 140, and the exhaust channel 101 runs through the first cylinder 120, the partition 140 and the second cylinder 130. The first cylinder 120 is provided with a first compression chamber 121, the second cylinder 130 is provided with a second compression chamber 131, and the partition 140 is used to seal the lower end surface of the first compression chamber 121 and the upper end surface of the second compression chamber 131. The crankshaft 110 is sleeved with a first piston 111 and a second piston 112, the first piston 111 is located in the first compression chamber 121, and the second piston 112 is located in the second compression chamber 131. When the crankshaft 110 rotates, the first piston 111 and the second piston 112 are driven to rotate, thereby compressing the refrigerant and improving the compression efficiency.

[0071] Continue to refer to Figure 1 As shown, in an embodiment of the utility model, the sum of the minimum exhaust areas of all exhaust channels 101 is S1. Among them, the minimum exhaust area of ​​the exhaust channel 101 can be calculated based on the cross-sectional area of ​​the exhaust channel 101 at the upper end surface of the partition 140. The sum of the minimum exhaust areas of all second air outlets 311 is S5. Among them, the minimum exhaust area of ​​the second air outlet 311 refers to the minimum exhaust area between the inner wall of the second air outlet 311 and the limiting portion 230. The sum of the minimum exhaust areas of all third air outlets 321 is S4. Among them, the minimum exhaust area of ​​the third air outlet 321 refers to the minimum exhaust area between the third air outlet 321 and the limiting portion 230. Satisfies: S5≥S1+S4.

[0072] It is understandable that when S5 is less than S1+S4, that is, the exhaust area of ​​the first muffler 310 is small, the refrigerant is easily accumulated in the first muffler 310, and it is difficult to be discharged in the first time, resulting in a decrease in the discharge efficiency of the refrigerant. To this end, by setting S5≥S1+S4, the accumulation of refrigerant in the first muffler 310 can be effectively reduced, so that the refrigerant can be smoothly discharged from the upper muffler 300, and the exhaust efficiency of the refrigerant is improved.

[0073] A compressor of an embodiment of the utility model comprises a pump body assembly 1000 of the above embodiment. The compressor of the utility model embodiment adopts the pump body assembly 1000 of the above embodiment, and the pump body assembly 1000 is provided with an exhaust passage 101 penetrating the upper and lower ends of the cylinder device 100 in the cylinder device 100, the crankshaft 110 and the cylinder device 100 are rotatably connected to compress the refrigerant, the upper bearing 200 is connected to the upper end of the cylinder device 100, and is provided with a first air outlet 220 connected to the exhaust passage 101, the lower bearing 400 is connected to the lower end of the cylinder device 100 and is provided with an air inlet 420 connected to the exhaust passage 101, and the upper muffler 300 and the lower muffler 500 are respectively connected to the upper bearing 200 and the lower bearing 400 to reduce the exhaust noise of the cylinder device 100. When the crankshaft 110 and the cylinder device 100 cooperate to compress the refrigerant, at least part of the refrigerant is discharged from the cylinder device 100 to the second muffler chamber 510, and then passes through the air inlet 420, the exhaust passage 101, the first air outlet 220 and the first muffler chamber 330 in sequence, and finally discharged from the pump body assembly 1000. By providing a groove on at least one of the upper end surface of the upper bearing 200 and the lower end surface of the lower bearing 400, the groove extends to the inner wall of the corresponding air inlet 420 or the first air outlet 220, so that the exhaust area of ​​the air inlet 420 or the first air outlet 220 can be expanded, and the resistance of the refrigerant movement can be effectively reduced, thereby improving the exhaust efficiency and reducing the flow loss of the refrigerant.

[0074] Since the compressor adopts all the technical solutions of the pump body assembly 1000 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0075] A refrigeration device according to an embodiment of the utility model includes the compressor according to the above embodiment, and the refrigeration device may be a refrigerator, a split air conditioner, an integrated air conditioner, a central air conditioner, etc. The refrigeration device according to the embodiment of the utility model adopts the compressor according to the above embodiment, and the pump body assembly 1000 of the compressor is provided with an exhaust passage 101 penetrating the upper and lower ends of the cylinder device 100 in the cylinder device 100, and the crankshaft 110 and the cylinder device 100 are rotatably connected to compress the refrigerant, the upper bearing 200 is connected to the upper end of the cylinder device 100, and is provided with a first air outlet 220 communicating with the exhaust passage 101, the lower bearing 400 is connected to the lower end of the cylinder device 100 and is provided with an air inlet 420 communicating with the exhaust passage 101, and the upper muffler 300 and the lower muffler 500 are respectively connected to the upper bearing 200 and the lower bearing 400 to reduce the exhaust noise of the cylinder device 100. When the crankshaft 110 and the cylinder device 100 cooperate to compress the refrigerant, at least part of the refrigerant is discharged from the cylinder device 100 to the second muffler chamber 510, and then passes through the air inlet 420, the exhaust passage 101, the first air outlet 220 and the first muffler chamber 330 in sequence, and finally discharged from the pump body assembly 1000. By providing a groove on at least one of the upper end surface of the upper bearing 200 and the lower end surface of the lower bearing 400, the groove extends to the inner wall of the corresponding air inlet 420 or the first air outlet 220, so that the exhaust area of ​​the air inlet 420 or the first air outlet 220 can be expanded, and the resistance of the refrigerant movement can be effectively reduced, thereby improving the exhaust efficiency and reducing the flow loss of the refrigerant.

[0076] Since the refrigeration device adopts all the technical solutions of the compressor of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0077] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A pump assembly, characterized in that: include: The cylinder device is provided with at least one exhaust passage, and the exhaust passage runs through the upper and lower ends of the cylinder device; a crankshaft, rotatably connected to the cylinder device; An upper bearing, sleeved on the crankshaft and connected to the upper end of the cylinder device, the upper bearing being provided with a first air outlet hole communicating with the upper end of the exhaust passage; An upper muffler device is sleeved on the crankshaft and connected to the upper bearing, and a first muffler cavity communicating with the first air outlet is formed between the upper muffler device and the upper bearing; A lower bearing, sleeved on the crankshaft and connected to the lower end of the cylinder device, the lower bearing being provided with an air inlet hole communicating with the lower end of the exhaust passage; A lower silencer connected to the lower bearing, wherein a second silencer cavity communicating with the air inlet is formed between the lower silencer and the lower bearing; Wherein, at least one of the lower end surface of the lower bearing and the upper end surface of the upper bearing is provided with a groove, and the groove extends to the inner wall of the corresponding air inlet hole or the first air outlet hole.

2. The pump assembly according to claim 1, characterized in that: The upper end surface of the upper bearing is provided with at least one groove, the groove located on the upper end surface of the upper bearing is a first groove, and the number of the first grooves is the same as the number of the first air outlet holes; On the projection plane perpendicular to the rotation axis of the crankshaft, the projection of the first groove is outside the projection of the contour line of the first air outlet, and the sum of the areas of the projections of all the first grooves is S3. The upper silencer device includes a first positioning portion, and the first positioning portion and the upper end surface of the upper bearing are abutted and positioned. The area of ​​the first air outlet blocked by the first positioning portion is S7, satisfying: S3≥S7.

3. The pump assembly according to claim 1, characterized in that: The lower end surface of the lower bearing is provided with at least one groove, the groove located on the lower end surface of the lower bearing is a second groove, and the number of the second grooves is the same as the number of the air inlet holes; On the projection plane perpendicular to the rotation axis of the crankshaft, the projection of the second groove is outside the projection of the contour line of the air intake hole, and the sum of the projection areas of all the second grooves is S2. The lower silencer device includes a second positioning portion, and the second positioning portion and the lower end surface of the lower bearing are abutted and positioned. The area of ​​the air intake hole blocked by the second positioning portion is S6, satisfying: S2≥S6.

4. The pump assembly according to claim 1, characterized in that: The groove is provided on the lower end surface of the lower bearing and the upper end surface of the upper bearing. The groove located on the lower end surface of the lower bearing is a second groove, which is connected to the air inlet hole. The groove located on the upper end surface of the upper bearing is a first groove, which is connected to the first air outlet hole.

5. The pump assembly according to claim 4, characterized in that: The maximum depth of the first groove is h1, and the maximum depth of the first air outlet is h2, which satisfies: 1 / 3≤h1 / h2≤2 / 3; And / or the maximum depth of the second groove is h3, the maximum depth of the air inlet hole is h4, and the following relationship is satisfied: 1 / 3≤h3 / h4≤2 / 3.

6. The pump assembly according to claim 4, characterized in that: The bottom wall of the first groove is a plane; Alternatively, the side wall of the first groove is an inclined surface and extends to the upper end surface of the upper bearing and the side wall of the first air outlet; Alternatively, the top wall of the second groove is a plane; Alternatively, the side wall of the second groove is an inclined surface and extends to the lower end surface of the lower bearing and the side wall of the air inlet hole.

7. The pump assembly according to claim 1, characterized in that: The sum of the minimum exhaust areas of all the exhaust channels is S1, the upper silencer device includes a first silencer and a second silencer, the first silencer is connected to the upper bearing, the second silencer cover is arranged on the first silencer, the first silencer is provided with at least one second air outlet, the sum of the minimum exhaust areas of all the second air outlets is S5, the second silencer is provided with at least one third air outlet, the sum of the minimum exhaust areas of all the third air outlets is S4, satisfying: S5≥S1+S4.

8. The pump assembly according to claim 7, characterized in that: The upper bearing includes a limiting portion extending upward, the limiting portion passes through the first muffler and the second muffler, the second air outlet is formed between the first muffler and the limiting portion, and the third air outlet is formed between the second muffler and the limiting portion.

9. The pump assembly according to claim 1, characterized in that: The cylinder device includes a first cylinder, a second cylinder and a partition, the first cylinder is connected to the upper end surface of the partition, the second cylinder is connected to the lower end surface of the partition, and the exhaust passage runs through the first cylinder, the partition and the second cylinder.

10. A compressor, characterized in that: The invention comprises a pump body assembly as claimed in any one of claims 1 to 9.

11. Refrigeration equipment, characterized in that: Comprising a compressor as claimed in claim 10.

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