Crankcase, compressor and refrigeration equipment

Abstract

The utility model provides a crank case, a compressor and refrigeration equipment. The crank case comprises a case body; the buffer cavity is arranged on the box body; the gas guide hole is formed in the box body and used for guiding gas into the buffer cavity; the flow guide channel is arranged between the air guide hole and the buffer cavity and used for communicating the air guide hole with the buffer cavity, the conduction area of the flow guide channel is gradually increased in the first direction, and the first direction is the direction from the air guide hole to the buffer cavity. According to the crankcase provided by the utility model, when the gas in the gas guide hole is guided into the buffer cavity through the flow guide channel, the gas can be dispersed more and more, so that the impact force of the gas entering the buffer cavity and the flow speed of the gas can be reduced, and when the gas impacts on a structure in the buffer cavity, the gas can be prevented from entering the buffer cavity. Noise generated by impact and too high gas flow speed can be reduced.

Description

Technical Field

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

[0002] At present, with the continuous development of refrigerator technology, the trend of high-speed compressors is becoming increasingly obvious. During the operation of the compressor, the airflow will generate noise, and this problem has become more prominent in the context of high speed. Specifically, although low-speed compressors block the airflow during operation, the noise is not obvious due to the low flow rate. When the compressor is running at high speed, the speed of the airflow will increase, so the noise caused by the airflow impacting the blocking surface will increase exponentially, making the noise problem more significant.

[0003] Therefore, how to design a crankcase that can reduce airflow impact noise has become a problem that needs to be solved urgently. Utility Model Content

[0004] The utility model aims at at least solving the problem of high noise of the compressor.

[0005] To this end, a first aspect of the utility model provides a crankcase.

[0006] A second aspect of the utility model provides a compressor.

[0007] A third aspect of the present invention provides a refrigeration device.

[0008] In view of this, the first aspect of the utility model proposes a crankcase, comprising: a case body; a buffer cavity, arranged on the case body; an air guide hole, arranged on the case body, for introducing gas into the buffer cavity; a guide channel, arranged between the air guide hole and the buffer cavity, for connecting the air guide hole and the buffer cavity, and the conduction area of ​​the guide channel gradually increases along a first direction, and the first direction is the direction from the air guide hole to the buffer cavity.

[0009] The crankcase provided by the utility model includes a case body, a buffer cavity, an air guide hole and a flow guide channel. The buffer cavity and the air guide hole are arranged on the case body, and the flow guide channel is arranged between the air guide hole and the buffer cavity, so that the air guide hole and the buffer cavity can be connected, so that the gas in the air guide hole can be introduced into the buffer cavity. Since the conduction area of ​​the flow guide channel gradually increases from the air guide hole to the buffer cavity, that is, when the gas flows to the buffer cavity in the flow guide channel, the flow guide area of ​​the flow guide channel will become larger and larger. Therefore, when the gas in the air guide hole is introduced into the buffer cavity through the flow guide channel, the gas can be more and more dispersed, which will reduce the flow rate of the gas. The flow rate of the gas and the noise are in a cubic relationship, so reducing the flow rate of the gas can greatly reduce the noise. In addition, since the gas is more and more dispersed, the impact force of the gas entering the buffer cavity can also be reduced, so when the gas impacts the structure in the buffer cavity, the noise generated by the impact can be reduced. At the same time, since the gas is more and more dispersed, the airflow will not completely impact one position, so the noise can be further reduced.

[0010] The crankcase provided by the utility model may also have the following additional technical features:

[0011] In some embodiments, optionally, the buffer cavity includes a first buffer cavity and a second buffer cavity, and the air guide hole includes: a first air guide hole, which is connected to the first buffer cavity; and a second air guide hole, both ends of which are respectively connected to the first buffer cavity and the second buffer cavity.

[0012] In this embodiment, the buffer chamber may include two, namely a first buffer chamber and a second buffer chamber, so that the pulsation of the gas during operation of the compressor can be weakened by the two buffer chambers, thereby reducing the noise generated by the gas flow. The air guide hole includes a first air guide hole and a second air guide hole. The first air guide hole is connected to the first buffer chamber, and can introduce the gas into the first buffer chamber. The two ends of the second air guide hole are respectively connected to the first buffer chamber and the second buffer chamber, so that the gas in the first buffer chamber can be introduced into the second buffer chamber, and the pulsation of the gas can be reduced by the two buffer chambers, thereby further reducing the noise. It can be understood that most of the noise generated by the compressor is caused by the pulsation of the airflow. Therefore, reducing the pulsation of the airflow can reduce the noise of the compressor.

[0013] In some embodiments, optionally, the guide channel includes: a first guide channel, which is arranged between the first air guide hole and the first buffer cavity, and is connected to the first air guide hole and the first buffer cavity; a second guide channel, which is arranged between the second air guide hole and the second buffer cavity, and is connected to the second air guide hole and the second buffer cavity.

[0014] In this embodiment, the guide channel includes a first guide channel, which is arranged between the first air guide hole and the first buffer cavity, and is connected to the first air guide hole and the first buffer cavity, so that the airflow in the first air guide hole can be guided to the first buffer cavity through the first guide channel to reduce the impact force of the airflow, thereby reducing noise. Similarly, the guide channel also includes a second guide channel, which is arranged between the second air guide hole and the second buffer cavity, and is connected to the second air guide hole and the second guide channel, so that the airflow from the first buffer cavity into the second air guide hole can be guided into the second buffer cavity through the second air guide hole, thereby further reducing the impact force of the airflow and reducing noise.

[0015] In some embodiments, optionally, the first buffer cavity is connected to the second buffer cavity, and the second air guide hole is obliquely arranged at the connection between the first buffer cavity and the second buffer cavity.

[0016] In this embodiment, the first buffer cavity and the second buffer cavity can be connected, so that the second air guide hole can be set at the connection position of the first buffer cavity and the second buffer cavity for air guide. Specifically, the second air guide hole can be set obliquely at the connection position of the first buffer cavity and the second buffer cavity, so that the air flow can be smoother, avoiding the air flow from directly affecting the internal structure of the second buffer cavity, thereby reducing noise.

[0017] In some embodiments, optionally, the air guide hole is a through hole or a stepped hole.

[0018] In this embodiment, the air guide hole can be a through hole, so that when the high-speed compressor is working, the flow rate of the gas can be guaranteed not to change suddenly, thereby effectively reducing the gas noise in the high-speed compressor. Of course, the air guide hole can also be a stepped hole, so that the pulsation of the gas can be reduced by setting the stepped hole.

[0019] In some embodiments, optionally, the crankcase further comprises: a cylinder barrel, which is disposed on the case body, the cylinder barrel comprising a cylinder hole, and a cross section of the cylinder hole and a cross section of the air guide hole have a preset angle.

[0020] In this embodiment, the crankcase further includes a cylinder barrel, which is disposed on the case body. The cylinder barrel includes a cylinder hole, and the cross section of the cylinder hole and the cross section of the air guide hole have a preset angle, so as to ensure that the gas introduced into the buffer cavity by the air guide hole does not face the structure disposed in the middle of the buffer cavity, thereby reducing the impact noise.

[0021] In some embodiments, optionally, the preset angle is greater than or equal to 60° and less than or equal to 80°.

[0022] In this embodiment, the preset angle is set to be greater than or equal to 60° and less than or equal to 80° to ensure that the air guide hole does not face the structure arranged in the middle of the buffer cavity.

[0023] In some embodiments, optionally, the diameter of the air guide hole is greater than or equal to 3 mm and less than or equal to 10 mm.

[0024] In this embodiment, the diameter of the air guide hole can be set to be greater than or equal to 3 mm and less than or equal to 10 mm. Such a size can further reduce the flow rate of the gas, thereby further reducing the noise generated by the impact of the gas.

[0025] In some embodiments, optionally, the buffer cavity includes: a cavity seat; a cavity cover, which is arranged at the cavity mouth of the cavity seat; a connecting component, which is used to connect the cavity seat and the cavity cover; and the air outlet direction of the air guide hole deviates from the connection component.

[0026] In this embodiment, the buffer cavity includes a cavity seat, a cavity cover and a connecting assembly. The cavity cover is arranged at the cavity opening of the cavity seat. The connecting assembly can connect the cavity seat and the cavity cover. The air outlet direction of the air guide hole deviates from the connection assembly, which can prevent the airflow from directly acting on the connection assembly, thereby reducing the noise generated by the impact of the airflow.

[0027] In some embodiments, optionally, the connection assembly includes: a connection boss, which is arranged at the bottom of the cavity seat; and a threaded hole, which is arranged along the height direction of the connection boss.

[0028] In this embodiment, the connection assembly includes a connection boss, which is arranged at the bottom of the cavity seat, so that the cavity cover can be fixed to the base through the connection boss arranged at the bottom. For example, the connection boss can be a connection threaded column arranged at the bottom of the cavity seat, and the cavity cover is connected to the cavity body through the connection threaded column. Among them, the connection assembly can also include a threaded hole, which is arranged along the height direction of the connection boss, so that the cavity cover can be fixed to the cavity seat by the cooperation of the connection bolt and the threaded hole. For example, a through hole can be arranged on the cavity cover, and then the connection bolt can be passed through the through hole and finally screwed into the threaded hole, so that the cavity cover can be fixed.

[0029] In some embodiments, optionally, the connecting boss includes: a first connecting boss, which is arranged at the bottom of the cavity seat; a second connecting boss, which is arranged on the first connecting boss and is stepped with the first connecting boss; and the height of the second connecting boss is less than or equal to half the depth of the threaded hole.

[0030] In this embodiment, the connecting boss includes a first connecting boss and a second connecting boss. The first connecting boss is arranged at the bottom of the cavity seat. The second connecting boss is arranged on the first connecting boss and is arranged in a stepped manner with the first connecting boss, that is, the second connecting boss is thinner than the first connecting boss, forming a stepped structure with a thin top and a thick bottom, so that the air guide direction of the air guide hole can be further avoided, and the airflow derived from the air guide hole is prevented from directly acting on the connecting boss, thereby reducing the noise generated by the impact of the airflow. At the same time, since the height of the second connecting boss is less than or equal to half the depth of the threaded hole, that is, the threaded hole needs to pass through the second connecting boss and set a certain depth on the first connecting boss, so that the connection strength can be guaranteed when the threaded hole is connected with the bolt.

[0031] A second aspect of the present invention provides a compressor, comprising: a crankcase as in any technical solution of the first aspect.

[0032] The compressor provided by the utility model includes the crankcase in any technical solution of the first aspect. Since the compressor includes the crankcase in any technical solution of the first aspect, the compressor provided by the present application also has all the beneficial technical effects of the crankcase in any technical solution of the first aspect, which will not be repeated here.

[0033] The third aspect of the utility model provides a refrigeration device, comprising: a crankcase as in any technical solution of the first aspect; and / or a compressor as in the technical solution of the second aspect.

[0034] The refrigeration device provided by the utility model includes the crankcase in any technical solution of the first aspect; and / or the compressor in the technical solution of the second aspect. Since the refrigeration device includes the crankcase in any technical solution of the first aspect and / or the compressor in the technical solution of the second aspect. Therefore, the refrigeration device provided by the present application also has all the beneficial technical effects of the crankcase in any technical solution of the first aspect and / or the compressor in the technical solution of the second aspect, which will not be repeated here.

[0035] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0037] Figure 1 A schematic structural diagram of a crankcase according to an embodiment of the utility model is shown;

[0038] Figure 2 One of the cross-sectional views of a crankcase of one embodiment of the utility model is shown;

[0039] Figure 3 One of the partial structural schematic diagrams of a crankcase of an embodiment of the utility model is shown;

[0040] Figure 4 A second schematic diagram of a partial structure of a crankcase according to an embodiment of the utility model is shown;

[0041] Figure 5 A second cross-sectional view of a crankcase according to an embodiment of the present invention is shown.

[0042] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names is as follows:

[0043] 1 housing, 2 buffer cavity, 20 first buffer cavity, 22 second buffer cavity, 24 cavity seat, 26 connecting assembly, 260 connecting boss, 2600 first connecting boss, 2602 second connecting boss, 262 threaded hole, 3 air guide hole, 30 first air guide hole, 32 second air guide hole, 4 guide channel, 40 first guide channel, 42 second guide channel, 5 cylinder barrel, 50 cylinder hole, 6 bearing hole, 7 support foot. DETAILED DESCRIPTION

[0044] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0046] Refer to the following Figures 1 to 5 The invention describes a crankcase, a compressor and a refrigeration device according to some embodiments of the invention.

[0047] According to an embodiment of the first aspect of the present utility model, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the first aspect of the utility model proposes a crankcase, which includes a case body 1, a buffer cavity 2, an air guide hole 3 and a guide channel 4. The buffer cavity 2 is arranged on the case body 1. The air guide hole 3 is arranged on the case body 1, and can introduce gas into the buffer cavity 2. The guide channel 4 is arranged between the air guide hole 3 and the buffer cavity 2, and can connect the air guide hole 3 and the buffer cavity 2. The conduction area of ​​the guide channel 4 gradually increases along the first direction, and the first direction is the direction from the air guide hole 3 to the buffer cavity 2.

[0048] The crankcase provided by the utility model comprises a case 1, a buffer cavity 2, an air guide hole 3 and a guide channel 4. The buffer cavity 2 and the air guide hole 3 are arranged on the case 1, and the guide channel 4 is arranged between the air guide hole 3 and the buffer cavity 2, so that the air guide hole 3 and the buffer cavity 2 can be connected, so that the gas in the air guide hole 3 can be introduced into the buffer cavity 2. Since the conduction area of ​​the guide channel 4 gradually increases from the air guide hole 3 to the buffer cavity 2, that is, when the gas flows from the guide channel 4 to the buffer cavity 2, the guide area of ​​the guide channel 4 will become larger and larger. Therefore, when the gas in the air guide hole 3 is introduced into the buffer cavity 2 through the guide channel 4, the gas can be more and more dispersed, which will reduce the flow rate of the gas. The flow rate of the gas is in a cubic relationship with the noise, so reducing the flow rate of the gas can greatly reduce the noise. In addition, since the gas is more and more dispersed, the impact force of the gas entering the buffer cavity 2 can also be reduced, so when the gas impacts the structure in the buffer cavity 2, the noise generated by the impact can be reduced. At the same time, as the gas becomes more and more dispersed, the airflow will not completely impact one location, thus further reducing noise.

[0049] In some embodiments, optionally, the buffer cavity 2 includes a first buffer cavity 20 and a second buffer cavity 22, and the air guide hole 3 includes: a first air guide hole 30, which is connected to the first buffer cavity 20; and a second air guide hole 32, wherein both ends of the second air guide hole 32 are respectively connected to the first buffer cavity 20 and the second buffer cavity 22.

[0050] In this embodiment, the buffer cavity 2 may include two, namely a first buffer cavity 20 and a second buffer cavity 22, so that the pulsation of the gas in the compressor during operation can be weakened by the two buffer cavities 2, thereby reducing the noise generated by the gas flow. The air guide hole 3 includes a first air guide hole 30 and a second air guide hole 32. The first air guide hole 30 is connected to the first buffer cavity 20, and can introduce the gas into the first buffer cavity 20. The two ends of the second air guide hole 32 are respectively connected to the first buffer cavity 20 and the second buffer cavity 22, so that the gas in the first buffer cavity 20 can be introduced into the second buffer cavity 22, and the pulsation of the gas can be reduced by the two buffer cavities 2, thereby further reducing the noise. It can be understood that most of the noise generated by the compressor is caused by the pulsation of the airflow. Therefore, reducing the pulsation of the airflow can reduce the noise of the compressor.

[0051] In some embodiments, optionally, the guide channel 4 includes: a first guide channel 40, which is arranged between the first air guide hole 30 and the first buffer cavity 20, and is connected to the first air guide hole 30 and the first buffer cavity 20; a second guide channel 42, which is arranged between the second air guide hole 32 and the second buffer cavity 22, and is connected to the second air guide hole 32 and the second buffer cavity 22.

[0052] In this embodiment, the guide channel 4 includes a first guide channel 40, which is arranged between the first air guide hole 30 and the first buffer cavity 20, and is connected to the first air guide hole 30 and the first buffer cavity 20, so that the airflow in the first air guide hole 30 can be guided to the first buffer cavity 20 through the first guide channel 40, so as to reduce the impact force of the airflow, thereby reducing noise. Similarly, the guide channel 4 also includes a second guide channel 42, which is arranged between the second air guide hole 32 and the second buffer cavity 22, and is connected to the second air guide hole 32 and the second guide channel 42, so that the airflow from the first buffer cavity 20 to the second air guide hole 32 can be introduced into the second buffer cavity 22 through the second air guide hole 32, thereby further reducing the impact force of the airflow and reducing noise.

[0053] In some embodiments, optionally, the first buffer cavity 20 is connected to the second buffer cavity 22 , and the second air guide hole 32 is obliquely arranged at the connection between the first buffer cavity 20 and the second buffer cavity 22 .

[0054] In this embodiment, the first buffer cavity 20 and the second buffer cavity 22 can be connected, so that the second air guide hole 32 can be set at the connection position of the first buffer cavity 20 and the second buffer cavity 22 for air guide. Specifically, the second air guide hole 32 can be set obliquely at the connection position of the first buffer cavity 20 and the second buffer cavity 22, so that the airflow can flow more smoothly, avoiding the airflow directly acting on the internal structure of the second buffer cavity 22, thereby reducing noise.

[0055] In some embodiments, optionally, the height of the second air guide hole 32 at one end close to the first buffer cavity 20 is higher than that at one end close to the second buffer cavity 22 .

[0056] In this embodiment, the height of the second air guide hole 32 at one end close to the first buffer cavity 20 is higher than that at the other end close to the second buffer cavity 22, that is, the second air guide hole 32 is inclined toward the bottom of the second buffer cavity 22 along the direction from the first buffer cavity 20 to the second buffer cavity 22, thereby avoiding the airflow from directly acting on the internal structure of the second buffer cavity 22, thereby reducing noise.

[0057] In some embodiments, optionally, the arrangement direction of the second air guide holes 32 is the same as the extension direction of the inner wall surface of the second buffer cavity 22 .

[0058] In this embodiment, the second air guide hole 32 can be arranged along the extension direction of the inner wall of the second buffer cavity 22, so that the airflow entering the second buffer cavity 22 can flow along the inner wall of the second buffer cavity 22, making the airflow flow smoother and reducing noise.

[0059] In some embodiments, optionally, the air guide hole 3 is a through hole or a stepped hole.

[0060] In this embodiment, the air guide hole 3 can be a through hole, so that the high-speed compressor can ensure that the flow rate of the gas does not change suddenly when it is working, and thus the gas noise in the high-speed compressor can be effectively reduced. It can be understood that with the trend of high-speed compressors, the gas flow rate increases rapidly, and the noise caused by the gas impacting the blocking surface will increase geometrically. Although the stepped holes set in the original low-speed compressor block the gas, the flow rate is small and the noise is not obvious. Moreover, since the size of the noise is in a cubic relationship with the flow rate. Therefore, the noise when the airflow of the high-speed compressor impacts the blocking surface is relatively large. Of course, the air guide hole 3 can also be a stepped hole, so that the pulsation of the gas can be reduced by setting the stepped hole.

[0061] In some embodiments, optionally, the crankcase further comprises: a cylinder barrel 5 disposed on the case body 1 , the cylinder barrel 5 comprising a cylinder hole 50 , and a cross section of the cylinder hole 50 and a cross section of the air guide hole 3 have a preset angle.

[0062] In this embodiment, the crankcase further includes a cylinder barrel 5, which is disposed on the housing 1. The cylinder barrel 5 includes a cylinder hole 50, and the cross section of the cylinder hole 50 and the cross section of the air guide hole 3 have a preset angle, so as to ensure that the gas introduced by the air guide hole 3 to the buffer cavity 2 does not face the structure disposed in the middle of the buffer cavity 2, thereby reducing the impact noise. It can be understood that, since the cross section of the cylinder hole 50 and the cross section of the air guide hole 3 have a preset angle, the axis of the cylinder hole 50 and the axis of the air guide hole 3 can be in the same plane. Or they may not be in the same plane.

[0063] In some embodiments, optionally, the axis of the cylinder hole 50 and the axis of the air guide hole 3 are in the same plane.

[0064] In some embodiments, optionally, the axis of the cylinder hole 50 and the axis of the air guide hole 3 are not in the same plane.

[0065] In some embodiments, optionally, the preset angle is greater than or equal to 60° and less than or equal to 80°.

[0066] In this embodiment, the preset angle is set to be greater than or equal to 60° and less than or equal to 80° to ensure that the air guide hole 3 does not face the structure arranged in the middle of the buffer cavity 2 .

[0067] In some embodiments, optionally, the preset angle is 60°.

[0068] In some embodiments, optionally, the preset angle is 65°.

[0069] In some embodiments, optionally, the preset angle is 70°.

[0070] In some embodiments, optionally, the diameter of the air guide hole 3 is greater than or equal to 3 mm and less than or equal to 10 mm.

[0071] In this embodiment, the diameter of the air guide hole 3 can be set to be greater than or equal to 3 mm and less than or equal to 10 mm. Such a size can further reduce the flow rate of the gas, thereby further reducing the noise generated by the impact of the gas.

[0072] In some embodiments, optionally, the diameter of the air guide hole 3 is greater than or equal to 5 mm and less than or equal to 8 mm.

[0073] In some embodiments, optionally, the diameter of the air guide hole 3 is 5 mm.

[0074] In some embodiments, optionally, the diameter of the air guide hole 3 is 6 mm.

[0075] In some embodiments, optionally, the diameter of the air guide hole 3 is 7 mm.

[0076] In some embodiments, optionally, the diameter of the air guide hole 3 is 8 mm.

[0077] In some embodiments, optionally, the buffer cavity 2 includes: a cavity seat 24; a cavity cover, which is arranged at the cavity mouth of the cavity seat 24; a connecting component 26, which is used to connect the cavity seat 24 and the cavity cover; and the air outlet direction of the air guide hole 3 is set away from the connecting component 26.

[0078] In this embodiment, the buffer cavity 2 includes a cavity seat 24, a cavity cover and a connecting assembly 26. The cavity cover is arranged at the cavity opening of the cavity seat 24. The connecting assembly 26 can connect the cavity seat 24 and the cavity cover. The air outlet direction of the air guide hole 3 deviates from the connecting assembly 26, which can prevent the airflow from directly acting on the connecting assembly 26, thereby reducing the noise generated by the impact of the airflow.

[0079] In some embodiments, optionally, Figure 5 As shown, the connection assembly 26 includes: a connection boss 260 disposed at the bottom of the cavity seat 24; and a threaded hole 262 disposed along the height direction of the connection boss 260.

[0080] In this embodiment, the connection component 26 includes a connection boss 260, which is arranged at the bottom of the cavity seat 24, so that the cavity cover can be fixed to the base through the connection boss 260 arranged at the bottom. For example, the connection boss 260 can be a connection threaded column arranged at the bottom of the cavity seat 24, and the cavity cover is connected to the cavity through the connection threaded column. Among them, the connection component 26 can also include a threaded hole 262, and the threaded hole 262 is arranged along the height direction of the connection boss 260, so that the cavity cover can be fixed to the cavity seat 24 through the cooperation of the connection bolt and the threaded hole 262. For example, a through hole can be set on the cavity cover, and then the connection bolt can be passed through the through hole and finally screwed into the threaded hole 262, so that the cavity cover can be fixed.

[0081] In some embodiments, optionally, the connecting boss 260 includes: a first connecting boss 2600, which is arranged at the bottom of the cavity seat 24; a second connecting boss 2602, which is arranged on the first connecting boss 2600 and is stepped with the first connecting boss 2600; the height of the second connecting boss 2602 is less than or equal to half the depth of the threaded hole 262.

[0082] In this embodiment, the connecting boss 260 includes a first connecting boss 2600 and a second connecting boss 2602. The first connecting boss 2600 is arranged at the bottom of the cavity seat 24. The second connecting boss 2602 is arranged on the first connecting boss 2600 and is arranged in a stepped manner with the first connecting boss 2600, that is, the second connecting boss 2602 is thinner than the first connecting boss 2600, forming a stepped structure with a thin top and a thick bottom, so that the air guide direction of the air guide hole 3 can be further avoided, and the air flow derived from the air guide hole 3 is prevented from directly acting on the connecting boss 260, thereby reducing the noise generated by the air flow impact. At the same time, since the height of the second connecting boss 2602 is less than or equal to half the depth of the threaded hole 262, that is, the threaded hole 262 needs to pass through the second connecting boss 2602 and set a certain depth on the first connecting boss 2600, so that the connection strength can be guaranteed when the threaded hole 262 is connected with the bolt.

[0083] According to an embodiment of the first aspect of the utility model, the first aspect of the utility model provides a crankcase, which is composed of a case 1, a buffer cavity 2, an air guide hole 3, a flow guide channel 4, a support leg 7, a bearing hole 6 and a cylinder 5. The buffer cavity 2 is a cylindrical buffer cavity, and a bolt column (connecting boss 260) is provided in the middle position of the cylindrical buffer cavity for bolting and installing the cavity cover. The buffer cavity 2 is connected to the top surface of the crankcase through a throttle hole (first air guide hole 30) to form a gas channel.

[0084] In some embodiments, optionally, the cylinder hole 50 of the cylinder barrel 5 is cylindrical, and the wall thickness of the cylinder barrel 5 is about 10 mm, so as to ensure that the piston reciprocates in the cylinder hole 50. The cylinder hole 50 can be connected to other positions through reinforcing ribs.

[0085] In some embodiments, optionally, there are four supporting legs 7, and the bearing hole 6 is cylindrical to ensure that the crankshaft main shaft rotates in the bearing hole 6, and the bearing hole 6 is connected to the four supporting legs 7 through a reinforcing plate surface.

[0086] In some embodiments, optionally, the four legs 7 are connected to the end surface of the stator by bolts. The four legs 7 are connected to the cylinder hole 50, the bearing hole 6 and the buffer cavity 2 by the box body 1.

[0087] In some embodiments, optionally, no step hole is formed in the crankcase throttle hole (the first air guide hole 30 ) to ensure that no sudden change in gas flow rate occurs.

[0088] In some embodiments, optionally, the hole diameter of the throttle hole is greater than or equal to 5 mm and less than or equal to 8 mm. And the end position of the throttle hole uses a large chamfered structural design. At the same time, the angle formed by the throttle hole and the center line of the cylinder bore 50 is greater than or equal to 60° to ensure that the airflow does not directly impact the bolt column. At the same time, the bolt columns of the two high-pressure chambers (the first buffer chamber 20 and the second buffer chamber 22) adopt a stepped structure to ensure that the range of obstruction to the airflow is small. The step line (step surface) of this stepped structure needs to be upward at the halfway point of the thread to ensure the installation strength of the bolt.

[0089] In addition, the connecting holes (second air guide holes 32) of the two high-pressure chambers need to adopt a through-hole structure so that no sudden change in gas flow rate occurs, and the diameter is guaranteed to be between 5 mm and 8 mm, thereby further reducing the flow rate. In addition, the end position of the connecting hole adopts a large chamfered structural design.

[0090] The structural design of the crankcase of the present application can ensure the overall airflow path ( Figure 3 and Figure 4 The direction indicated by the arrow in is the air flow route, that is, the air outlet direction of the air guide hole 3). No large gas impact is generated within the range, and the gas flow rate does not suddenly change, which effectively reduces the gas noise in the high-speed compressor.

[0091] A second aspect of the utility model provides a compressor, comprising: a crankcase as in any one of the embodiments of the first aspect.

[0092] The compressor provided by the utility model includes the crankcase in any one of the embodiments of the first aspect. Since the compressor includes the crankcase in any one of the embodiments of the first aspect, the compressor provided by the present application also has all the beneficial technical effects of the crankcase in any one of the embodiments of the first aspect, which will not be repeated here.

[0093] In some embodiments, optionally, the compressor comprises a reciprocating compressor.

[0094] In some embodiments, optionally, the reciprocating compressor comprises a high speed reciprocating compressor.

[0095] A third aspect of the present invention provides a refrigeration device, comprising: a crankcase as in any one of the embodiments of the first aspect; and / or a compressor as in any one of the embodiments of the second aspect.

[0096] The refrigeration device provided by the utility model includes the crankcase in any one of the embodiments of the first aspect; and / or the compressor in the embodiment of the second aspect. Since the refrigeration device includes the crankcase in any one of the embodiments of the first aspect and / or the compressor in the embodiment of the second aspect. Therefore, the refrigeration device provided by the present application also has all the beneficial technical effects of the crankcase in any one of the embodiments of the first aspect and / or the compressor in the embodiment of the second aspect, which will not be repeated here.

[0097] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0098] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0099] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A crankcase, characterized in that: include: Box; A buffer cavity is arranged on the box body; An air guide hole, provided on the box body, for introducing gas into the buffer cavity; A guide channel is arranged between the air guide hole and the buffer cavity, and is used to connect the air guide hole and the buffer cavity. The conduction area of ​​the guide channel gradually increases along a first direction, and the first direction is the direction from the air guide hole to the buffer cavity.

2. The crankcase according to claim 1, characterized in that The buffer cavity comprises a first buffer cavity and a second buffer cavity, and the air guide hole comprises: a first air guide hole, connected to the first buffer cavity; The second air guide hole has two ends which are respectively connected to the first buffer cavity and the second buffer cavity.

3. The crankcase according to claim 2, characterized in that: The diversion channel comprises: a first guide channel, disposed between the first air guide hole and the first buffer cavity, and communicating with the first air guide hole and the first buffer cavity; The second guide channel is arranged between the second air guide hole and the second buffer cavity, and is communicated with the second air guide hole and the second buffer cavity.

4. The crankcase according to claim 2, characterized in that: The first buffer cavity is connected to the second buffer cavity, and the second air guide hole is obliquely arranged at the connection between the first buffer cavity and the second buffer cavity.

5. The crankcase according to any one of claims 1 to 4, characterized in that The air guide hole is a through hole or a stepped hole.

6. The crankcase according to any one of claims 1 to 4, characterized in that Also includes: The cylinder barrel is arranged on the box body, and the cylinder barrel comprises a cylinder hole, and the cross section of the cylinder hole and the cross section of the air guide hole have a preset angle.

7. The crankcase according to claim 6, characterized in that The preset angle is greater than or equal to 60° and less than or equal to 80°.

8. The crankcase according to any one of claims 1 to 4, characterized in that The diameter of the air guide hole is greater than or equal to 3 mm and less than or equal to 10 mm.

9. The crankcase according to any one of claims 1 to 4, characterized in that The buffer cavity comprises: Cavity seat; A cavity cover, arranged at the cavity opening of the cavity seat; A connecting assembly, used for connecting the cavity seat and the cavity cover; The air outlet direction of the air guide hole is arranged away from the connecting component.

10. The crankcase according to claim 9, characterized in that The connection component comprises: A connecting boss is arranged at the bottom of the cavity seat; The threaded hole is arranged along the height direction of the connecting boss.

11. The crankcase according to claim 10, characterized in that The connecting boss comprises: A first connecting boss is arranged at the bottom of the cavity seat; A second connecting boss is disposed on the first connecting boss and is arranged in a stepped manner with the first connecting boss; The height of the second connecting boss is less than or equal to half the depth of the threaded hole.

12. A compressor, characterized in that: include: A crankcase as claimed in any one of claims 1 to 11.

13. A refrigeration device, characterized in that: include: A crankcase as claimed in any one of claims 1 to 11; and / or The compressor of claim 12.

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