Patent Description:
At present, as shown in <FIG> and <FIG>, a compressor <NUM>' comprises a crankshaft <NUM>'. The crankshaft <NUM>' comprises a main shaft part <NUM>', an auxiliary shaft part <NUM>' and an eccentric part <NUM>'. A main bearing <NUM>' is sleeved on the main shaft part <NUM>', an auxiliary bearing <NUM>' is sleeved on the auxiliary shaft part <NUM>', a cylinder <NUM>' comprises a cylinder chamber, a piston <NUM>' is arranged in the cylinder chamber and is sleeved on the eccentric part <NUM>', a rotor <NUM>' is connected with the main shaft part <NUM>', and a balance block <NUM>' is arranged on the rotor <NUM>'. As shown in <FIG>, the reliability problems such as abnormal wear and the like most easily caused by the position that the main shaft part <NUM>' is matched with the main bearing <NUM>', the position that the auxiliary shaft part <NUM>' is matched with the auxiliary bearing <NUM>', and the position that the eccentric part <NUM>' is matched with the piston <NUM>'; and in <FIG>, the position A' represents the part that the wear of the main shaft part <NUM>' and the main bearing <NUM>' is easily caused. In order to ensure the reliability of kinematic pairs at the matching positions, a larger shaft diameter and a higher bearing can be only adopted in the prior art, thereby leading to the enlargement of the volume of the compressor <NUM>', the raise of the cost and the increase of the friction loss. <CIT> relates generally to a rotation compressor and a refrigeration equipment with the rotation compressor.

In the following, each of the described methods, apparatuses, embodiments, examples, and aspects, which do not fully correspond to the invention as defined in the claims is thus not according to the invention and is, as well as the whole following description, present for illustration purposes only or to highlight specific aspects or features of the claims. The present application aims to solve at least one of technical problems existing in the prior art or related technologies.

To this end, a first aspect of the present application provides a compressor.

A second aspect of the present application provides refrigeration device.

In view of this, the first aspect of the present application provides the compressor, which comprises a crankshaft and a connecting structure arranged on the crankshaft, wherein an avoidance part is arranged on the connecting structure and/or the crankshaft, the avoidance part is located at the part that the connecting structure is matched with the crankshaft, and the avoidance part is configured to be suitable for avoiding at least one of the connecting structure and the crankshaft.

The compressor provided by the present application comprises the crankshaft and the connecting structure connected with the crankshaft, wherein the avoidance part is arranged on the connecting structure and/or the crankshaft, the avoidance part is used for avoiding at least one of the connecting structure and the crankshaft, and a gap between the crankshaft and the connecting structure is increased through the arrangement of the avoidance part, so that the avoidance part can avoid the oblique crankshaft when the crankshaft is obliquely deformed, thus the crankshaft and the connecting structure can keep in surface contact, and an oil film between the crankshaft and the connecting structure is not damaged, thereby effectively ensuring the reliability of the compressor. Therefore, a smaller axle diameter and a shorter axle sleeve can be used, thereby reducing the volume and the cost of the compressor, reducing the friction loss of the part that the crankshaft is matched with the connecting structure, and improving the performance of the compressor.

Understandably, the avoidance part is used for avoiding at least one of the connecting structure and the crankshaft, and namely, the avoidance part is used for avoiding oblique deformation of the crankshaft, thus ensuring the contact between the crankshaft corresponding to the avoidance part and the connecting structure to be the surface contact after the crankshaft is oblique.

In addition, the compressor provided by the present application may also have the additional technical features as follows.

In the above embodiment, the gap is formed between the crankshaft and the connecting structure, and the gap corresponding to the avoidance part is enlarged to the direction far away from the middle part of the connecting structure along the axial direction of the crankshaft.

In the embodiment, the gap is formed between the crankshaft and the connecting structure, and lubricating oil can be distributed in the gap, wherein the gap corresponding to the avoidance part is enlarged to the direction far away from the middle part of the connecting structure along the axial direction of the crankshaft, thus an avoidance space is formed for deformation of the crankshaft by the gradually enlarged gap when the crankshaft is obliquely deformed, and the contact between the crankshaft and the connecting structure becomes the surface contact, thereby ensuring the normal work of an oil film, avoiding the wear between the crankshaft and the connecting structure and improving the reliability of the compressor.

In any of the above embodiments, in the compressor, the sum of gaps at the two sides of the axis of the crankshaft is defined as a bilateral gap at the same axial height in the cross section in the axial direction of the crankshaft; the minimum value of the bilateral gap corresponding to the avoidance part is δ<NUM>, the difference between the maximum value of the bilateral gap corresponding to the avoidance part and δ<NUM> is δ, the diameter of the crankshaft corresponding to the minimum part of the bilateral gap corresponding to the avoidance part is D, and the length of the avoidance part is h along the axial direction of the crankshaft, wherein the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>.

In the embodiment, the avoidance part is gradually enlarged along the direction from the middle part of the connecting structure to the end part of the connecting structure, thus the bilateral gap corresponding to the avoidance part has the minimum value and the maximum value, the minimum value of the bilateral gap corresponding to the avoidance part is δ<NUM>, the difference between the maximum value of the bilateral gap corresponding to the avoidance part and δ<NUM> is δ, the diameter of the crankshaft corresponding to the minimum part of the bilateral gap corresponding to the avoidance part is D, the length of the avoidance part is h along the axial direction of the crankshaft, and the improvement effect of the friction between the crankshaft and the connecting structure is affected by the corresponding dimension of the avoidance part, therefore, the product of δ/δ<NUM> and D/h is set as more than or equal to <NUM> and less than or equal to <NUM>, and the improvement effect of the friction between the crankshaft and the connecting structure due to the avoidance part is the best.

In any of the above embodiments, the avoidance part comprises a plurality of avoidance sections, and the plurality of avoidance sections are sequentially connected with one another along the axial direction of the crankshaft, wherein at least one of the avoidance sections satisfies the condition that the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>.

In the embodiment, the avoidance part comprises a plurality of avoidance sections, the avoidance sections are sequentially connected with one another along the axial direction, and the dimension of at least one of the avoidance sections satisfies a relational expression that the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>.

In any of the above embodiments, the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>.

In the embodiment, when the product of δ/δ<NUM> and D/h is set as more than or equal to <NUM> and less than or equal to <NUM>, the improvement effect of the friction between the crankshaft and the connecting structure is better.

In any of the above embodiments, h is more than or equal to <NUM> and less than or equal to <NUM>.

In the embodiment, the axial height h of the avoidance part is set as more than or equal to <NUM> and less than or equal to <NUM>, thereby being convenient for processing of the avoidance part, and meanwhile, being beneficial for reduction of wear between the crankshaft and the connecting structure.

In any of the above embodiments, the dimension of the gap corresponding to at least part of the avoidance part changes linearly along the axial direction of the crankshaft.

In the embodiment, the dimension of the gap corresponding to at least part of the avoidance part changes linearly along the axial direction of the crankshaft, and namely, in the compressor, the radial dimension of the gap from the direction far away from the middle part of the connecting structure along the axial direction of the crankshaft in the cross section in the axial direction of the crankshaft changes in direct proportion.

In any of the above embodiments, a wall surface formed by the avoidance part comprises a conical surface.

In the embodiment, the wall surface formed by the avoidance part comprises the conical surface, thereby enabling the gap between the crankshaft and the connecting structure to change linearly, and meanwhile, being convenient for processing of the avoidance part.

In any of the above embodiments, in the compressor, an acute angle between a tangent line of the wall surface formed by at least part of the avoidance part and the direction perpendicular to the axis of the crankshaft is gradually reduced along the direction far away from the middle part of the connecting structure in the cross section in the axial direction of the crankshaft.

In the embodiment, the tangent line of the wall surface formed by at least part of the avoidance part gradually tends to be horizontal along the direction far away from the middle part of the connecting structure in the axial direction of the crankshaft, and namely, the acute angle between the tangent line of the wall surface formed by the avoidance part and the direction perpendicular to the axis of the crankshaft is gradually reduced, so that the avoidance part is better matched with the shape of deflection deformation of the crankshaft, thereby further improving the improvement effect of wear.

In any of the above embodiments, the wall surface formed by the avoidance part comprises a curved surface.

In the embodiment, the wall surface formed by the avoidance part comprises the curved surface, so that the change of the gap corresponding to the avoidance part is better matched with the shape of deflection deformation of the crankshaft, thereby further improving the improvement effect of wear.

In any of the above embodiments, the avoidance part is annular in the cross section perpendicular to the axis of the crankshaft.

In the embodiment, the avoidance part is annular, and the annular avoidance part can have good avoidance effect on all directions of the crankshaft when the crankshaft is obliquely deformed, thereby improving the improvement effect of wear between the crankshaft and the connecting structure in all directions, and namely, reducing the degree of wear in all directions.

In any of the above embodiments, the crankshaft comprises a main body and an eccentric part; the main body comprises a first shaft part and a second shaft part that are coaxially arranged; the eccentric part is connected with the main body, and the main body and the eccentric part are eccentrically arranged.

In the embodiment, the crankshaft comprises the main body and the eccentric part, the main body comprises the first shaft part and the second shaft part, the first shaft part is connected with a rotor of a motor to drive the eccentric part to rotate, and a suction process and an exhaust process of the compressor are realized through the rotation of the eccentric part.

In any of the above embodiments, the connecting structure comprises a first bearing, a second bearing and a piston, the first bearing is sleeved on the first shaft part, the second bearing is sleeved on the second shaft part, and the piston is sleeved on the eccentric part.

In the embodiment, the connecting structure comprises the first bearing, the second bearing and the piston. The first bearing is sleeved on the first shaft part, the second bearing is sleeved on the second shaft part, the crankshaft is fixed through the first bearing and the second bearing, the piston is sleeved on the eccentric part, and the piston is driven to move through the rotation of the eccentric part, so that the suction process and the exhaust process of the compressor are realized.

In any of the above embodiments, based on the condition that the avoidance part is arranged on the crankshaft, and the avoidance part is arranged at the part that the first shaft part is close to the second shaft part, and/or the avoidance part is arranged at the part that the first shaft part is far away from the second shaft part, and/or the avoidance part is arranged at one end that the eccentric part is close to the first bearing, and/or the avoidance part is arranged at one end that the eccentric part is close to the second bearing, and/or the avoidance part is arranged at one end that the second shaft part is close to the eccentric part.

In the embodiment, when the avoidance part is arranged on the crankshaft, the avoidance part is arranged at any one or the combination of the part that the first shaft part is close to the second shaft part, the part that the first shaft part is far away from the second shaft part, the end that the eccentric part is close to the first bearing, the end that the eccentric part is close to the second bearing, and the end that the second shaft part is close to the eccentric part.

In any of the above embodiments, based on the condition that the avoidance part is arranged on the connecting structure, the avoidance part is arranged at one end that the first bearing is close to the second bearing, and/or the avoidance part is arranged at one end that the first bearing is far away from the second bearing, and/or the avoidance part is arranged at one end that the piston is close to the first bearing, and/or the avoidance part is arranged at one end that the piston is close to the second bearing, and/or the avoidance part is arranged at one end that the second bearing is close to the first bearing.

In the embodiment, when the avoidance part is arranged on the connecting structure, the avoidance part is arranged at any one or the combination of the end that the first bearing is close to the second bearing, the end that the first bearing is far away from the second bearing, the end that the piston is close to the first bearing, the end that the piston is close to the second bearing, and the end that the second bearing is close to the first bearing.

Certainly, the avoidance part can be also arranged on the connecting structure and the crankshaft at the same time.

In any of the above embodiments, the compressor also comprises a cylinder, a sliding piece and a rotor. The cylinder comprises a cylinder chamber, the piston is arranged in the cylinder chamber, the crankshaft is arranged in the cylinder chamber in a penetrating manner, a sliding piece groove is formed in the cylinder, the sliding piece is arranged in the sliding piece groove and is connected with the piston in a rolling manner, and the rotor is connected with the first shaft part.

In the embodiment, the compressor also comprises the cylinder, the sliding piece and the rotor, the rotor is connected with the first shaft part, the cylinder is provided with the cylinder chamber, the piston is arranged in the cylinder chamber, and the crankshaft is arranged in the cylinder chamber in a penetrating manner, wherein the sliding piece groove is formed in the cylinder, and the sliding piece is arranged in the sliding piece groove and is rotatably connected with the piston, so that the suction process and the exhaust process of the compressor are realized.

In any of the above embodiments, the compressor is an inverter compressor.

In the embodiment, the compressor is the inverter compressor, the reliability of the inverter compressor can be improved in a way that the avoidance part is arranged on the connecting structure or the crankshaft, and certainly, the compressor can be also a constant speed compressor.

In any of the above embodiments, the compressor is filled with coolants, and the coolants are difluoromethane or propane.

In the embodiment, the compressor is filled with the coolants, the refrigeration or heating of the refrigeration device is realized through a heat adsorption process and a heat release process of the coolants, specifically, the coolants are difluoromethane or propane, and certainly, the coolants can also be other coolants.

According to the second aspect of the present application, the present application also provides the refrigeration device, which comprises the compressor in any of the above embodiments.

The refrigeration device provided by the second aspect of the present application comprises the compressor provided in any of the above embodiments, therefore, the refrigeration device has all beneficial effects of the compressors.

Specifically, the refrigeration device comprises a heat exchanger, the heat exchanger is communicated with the compressor by a pipeline, and the coolants can flow in the pipeline.

Additional aspects and advantages of the present application will be apparent from the following description, or may be learned by practice of the present application.

In order that the above objects, features, and advantages of the present application may be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and preferred embodiments. It should be noted that the embodiments and features in the embodiments of the present application may be combined with one another without conflict.

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

A compressor <NUM> and a refrigeration device according to embodiments of the present application are described with the reference of <FIG>.

As shown in <FIG>, according to one embodiment of the present application, the present application provides a compressor <NUM>, which comprises a crankshaft <NUM> and a connecting structure <NUM>.

Specifically, the connecting structure <NUM> is arranged on the crankshaft <NUM>, wherein an avoidance part <NUM> is arranged on the connecting structure <NUM> and/or the crankshaft <NUM>, the avoidance part <NUM> is located at the part that the connecting structure <NUM> is matched with the crankshaft <NUM>, and the avoidance part <NUM> is configured to be suitable for avoiding at least one of the connecting structure <NUM> and the crankshaft <NUM>.

The compressor <NUM> provided by the present application comprises the crankshaft <NUM> and the connecting structure <NUM> connected with the crankshaft <NUM>, wherein the avoidance part <NUM> is arranged on the connecting structure <NUM> and/or the crankshaft <NUM>, the avoidance part <NUM> is used for avoiding at least one of the connecting structure <NUM> and the crankshaft <NUM>, and a gap <NUM> between the crankshaft <NUM> and the connecting structure <NUM> is increased through the arrangement of the avoidance part <NUM>, so that the avoidance part <NUM> can avoid the oblique crankshaft <NUM> when the crankshaft <NUM> is obliquely deformed, thus the crankshaft <NUM> and the connecting structure <NUM> can keep in surface contact, and an oil film between the crankshaft <NUM> and the connecting structure <NUM> is not damaged, thereby effectively ensuring the reliability of the compressor <NUM>. Therefore, a smaller axle diameter and a shorter axle sleeve can be used, thereby reducing the volume and the cost of the compressor <NUM>, reducing the friction loss at the part that the crankshaft <NUM> is matched with the connecting structure <NUM>, and improving the performance of the compressor <NUM>.

Understandably, the avoidance part <NUM> is used for avoiding at least one of the connecting structure <NUM> and the crankshaft <NUM>, and namely, the avoidance part <NUM> is used for avoiding oblique deformation of the crankshaft <NUM>, thus ensuring the contact between the crankshaft <NUM> corresponding to the avoidance part <NUM> and the connecting structure <NUM> to be the surface contact after the crankshaft <NUM> is oblique.

Specifically, when the avoidance part <NUM> is not arranged, the contact between the crankshaft <NUM> and the connecting structure <NUM> is line contact if the crankshaft <NUM> is obliquely deformed, the local oil film is cracked, and metal contact is directly caused between the crankshaft <NUM> and the connecting structure <NUM>, so as to easily cause wear; and after the avoidance part <NUM> is arranged, the contact between the crankshaft <NUM> and the connecting structure <NUM> is still the surface contact if the crankshaft <NUM> is obliquely deformed, thereby ensuring the normal work of the oil film, so as to reduce the degree of wear between the crankshaft <NUM> and the connecting structure <NUM> and improve the reliability of the compressor <NUM>.

Specifically, based on the condition that the avoidance part <NUM> is arranged on the connecting structure <NUM>, the shape of the avoidance part <NUM> is fit for the shape of the outer side wall of the corresponding oblique crankshaft <NUM>; and based on the condition that the avoidance part <NUM> is arranged on the crankshaft <NUM>, the shape of the avoidance part <NUM> is fit for the shape of the inner side wall of the connecting structure <NUM> after the crankshaft <NUM> is oblique.

Specifically, the avoidance part <NUM> is arranged at the end part of the connecting structure <NUM> and/or arranged at the part of the crankshaft <NUM>, which corresponds to the end part of the connecting structure <NUM>.

Specifically, the avoidance part <NUM> is arranged on the periphery of the end part of the connecting structure <NUM> and/or arranged on the periphery of the part of the crankshaft <NUM>, which corresponds to the end part of the connecting structure.

Specifically, when the avoidance part <NUM> is arranged on the connecting structure <NUM>, at least part of the avoidance part <NUM> is arranged on the inner side wall of the connecting structure <NUM>.

As shown in <FIG>, one embodiment according to the present application comprises the features limited by the above embodiment, and further, the gap <NUM> is formed between the crankshaft <NUM> and the connecting structure <NUM>, and the gap <NUM> corresponding to the avoidance part <NUM> is enlarged to the direction far away from the middle part of the connecting structure <NUM> along the axial direction of the crankshaft <NUM>.

In the embodiment, the gap <NUM> is formed between the crankshaft <NUM> and the connecting structure <NUM>, and lubricating oil can be distributed in the gap <NUM>, wherein the gap <NUM> corresponding to the avoidance part <NUM> is enlarged to the direction far away from the middle part of the connecting structure <NUM> along the axial direction of the crankshaft <NUM>, thus an avoidance space is formed for the crankshaft <NUM> by the gradually enlarged gap <NUM> when the crankshaft <NUM> is obliquely deformed, and the contact between the crankshaft <NUM> and the connecting structure <NUM> becomes surface contact, thereby ensuring the normal work of an oil film, avoiding the wear between the crankshaft <NUM> and the connecting structure <NUM> and improving the reliability of the compressor <NUM>.

Specifically, the connecting structure <NUM> can comprise two end parts and a middle part arranged between the two end parts. The gap <NUM> corresponding to the avoidance part <NUM> is gradually enlarged along the direction far away from the middle part of the connecting structure <NUM>, so as to be suitable for the shape of the crankshaft <NUM> after the crankshaft <NUM> is obliquely deformed.

Specifically, when the avoidance part <NUM> is arranged on the connecting structure <NUM>, the avoidance part <NUM> is arranged at the end part of the connecting structure <NUM>, and the avoidance part <NUM> is obliquely arranged on the radial outer side of the connecting structure <NUM> along the direction far away from the middle part of the connecting structure <NUM> in the axial direction of the crankshaft <NUM>. When the avoidance part <NUM> is arranged on the crankshaft <NUM>, the avoidance part <NUM> is arranged at the part of the crankshaft <NUM>, which corresponds to the end part of the connecting structure <NUM>, and the avoidance part <NUM> is oblique to the axial direction of the crankshaft <NUM> along the direction of the middle part of the connecting structure <NUM> in the axial direction of the crankshaft <NUM>.

One embodiment according to the present application comprises the features limited by the above embodiments, and further, in the compressor <NUM>, the sum of gaps <NUM> at the two sides of the axis of the crankshaft <NUM> is defined as a bilateral gap at the same axial height in the cross section in the axial direction of the crankshaft <NUM>. The minimum value of the bilateral gap <NUM> corresponding to the avoidance part <NUM> is δ<NUM>, the difference between the maximum value of the bilateral gap <NUM> corresponding to the avoidance part <NUM> and δ<NUM> is δ, the diameter of the crankshaft <NUM> corresponding to the minimum part of the bilateral gap <NUM> corresponding to the avoidance part <NUM> is D, and the length of the avoidance part <NUM> is h along the axial direction of the crankshaft <NUM>, wherein the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>.

In the embodiment, the avoidance part <NUM> is gradually enlarged along the direction from the middle part of the connecting structure <NUM> to the end part of the connecting structure <NUM>, thus the bilateral gap <NUM> corresponding to the avoidance part <NUM> has the minimum value and the maximum value, the minimum value of the bilateral gap <NUM> corresponding to the avoidance part <NUM> is δ<NUM>, the difference between the maximum value of the bilateral gap <NUM> corresponding to the avoidance part <NUM> and δ<NUM> is δ, the diameter of the crankshaft <NUM> corresponding to the minimum part of the bilateral gap <NUM> corresponding to the avoidance part <NUM> is D, the length of the avoidance part <NUM> is h along the axial direction of the crankshaft <NUM>, and the improvement effect of the friction between the crankshaft <NUM> and the connecting structure <NUM> is affected by the corresponding dimension of the avoidance part <NUM>, therefore, the product of δ/δ<NUM> and D/h is set as more than or equal to <NUM> and less than or equal to <NUM>, and at the moment, the improvement effect of the friction between the crankshaft <NUM> and the connecting structure <NUM> by virtue of the avoidance part is the best.

Specifically, δ<NUM>/<NUM> is the half of the bilateral gap <NUM> corresponding to the avoidance part <NUM>, and δ/<NUM> is the half of the difference between the maximum value of the bilateral gap <NUM> corresponding to the avoidance part <NUM> and δ<NUM>.

Specifically, the difference between the diameter of the inner side wall of the connecting structure <NUM> and the diameter of the crankshaft <NUM> is the bilateral gap <NUM>.

Further, the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>.

In the embodiment, when the product of δ/δ<NUM> and D/h is set as more than or equal to <NUM> and less than or equal to <NUM>, the improvement effect of the friction between the crankshaft <NUM> and the connecting structure <NUM> is better.

Specifically, as shown in <FIG> is a curve chart of the affection of the corresponding dimension of the avoidance part <NUM> on the minimum oil film thickness, wherein a horizontal axis adopts logarithmic coordinates, the carrying capacity of the oil film between the crankshaft <NUM> and the connecting structure <NUM> can be represented by the minimum oil film thickness, the bigger the minimum oil film thickness is, the higher the carrying capacity of the oil film is, and the wear is not easily caused between the crankshaft <NUM> and the connecting structure <NUM>.

Further, h is more than or equal to <NUM> and less than or equal to <NUM>.

In the embodiment, the axial height of the avoidance part <NUM> is set as more than or equal to <NUM> and less than or equal to <NUM>, so as to be convenient for processing of the avoidance part <NUM>, and meanwhile, be beneficial for reduction of wear between the crankshaft <NUM> and the connecting structure <NUM>.

As shown in <FIG> and <FIG>, one embodiment according to the present application comprises the features limited by the above embodiments, and further, the avoidance part <NUM> comprises a plurality of avoidance sections, and the plurality of avoidance sections are sequentially connected with one another along the axial direction of the crankshaft <NUM>, wherein at least one of the avoidance sections satisfies the condition that the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>.

In the embodiment, the avoidance part <NUM> comprises a plurality of avoidance sections, the avoidance sections are sequentially connected with one another along the axial direction, and the dimension of at least one of the avoidance sections satisfies a relational expression that the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>.

Understandably, the avoidance sections satisfy the relational expression that the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>, namely, the minimum value of the bilateral gap <NUM> corresponding to the avoidance sections is δ<NUM>, the difference between the maximum value of the bilateral gap <NUM> corresponding to the avoidance sections and δ<NUM> is δ, the diameter of the crankshaft <NUM> corresponding to the minimum part of the bilateral gap <NUM> corresponding to the avoidance sections is D, the length of the avoidance sections along the axial direction of the crankshaft <NUM> is h, and the corresponding δ, δ<NUM>, D and h of the avoidance sections satisfy the above limited relational expression.

Specifically, the avoidance part <NUM> is arranged at the end part of the connecting structure <NUM> along the axial direction of the crankshaft <NUM>, the oblique angles of the avoidance sections can be same or different, and further, the avoidance sections are slidingly connected with one another.

As shown in <FIG> and <FIG>, one embodiment according to the present application comprises the features limited by the above embodiments, and further, the dimension of the gap <NUM> corresponding to at least part of the avoidance part <NUM> changes linearly along the axial direction of the crankshaft <NUM>.

In the embodiment, the dimension of the gap <NUM> corresponding to at least part of the avoidance part <NUM> changes linearly along the axial direction of the crankshaft <NUM>, and namely, in the compressor <NUM>, the radial dimension of the gap <NUM> from the direction far away from the middle part of the connecting structure <NUM> along the axial direction of the crankshaft <NUM> in the cross section in the axial direction of the crankshaft <NUM> changes in direct proportion.

Further, a wall surface formed by the avoidance part <NUM> comprises a conical surface.

In the embodiment, the wall surface formed by the avoidance part <NUM> comprises the conical surface, thereby enabling the gap <NUM> between the crankshaft <NUM> and the connecting structure <NUM> to change linearly, and meanwhile, being convenient for processing of the avoidance part <NUM>.

As shown in <FIG>, one embodiment according to the present application comprises the features limited by the above embodiments, and further, in the compressor <NUM>, an acute angle between a tangent line of the wall surface formed by at least part of the avoidance part <NUM> and the direction perpendicular to the axis of the crankshaft <NUM> is gradually reduced along the direction far away from the middle part of the connecting structure <NUM> in the cross section in the axial direction of the crankshaft <NUM>.

In the embodiment, the tangent line of the wall surface formed by at least part of the avoidance part <NUM> gradually tends to be horizontal along the direction far away from the middle part of the connecting structure <NUM> in the axial direction of the crankshaft <NUM>, and namely, the acute angle between the tangent line of the wall surface formed by the avoidance part <NUM> and the direction perpendicular to the axis of the crankshaft <NUM> is gradually reduced, so that the avoidance part <NUM> is better matched with the shape of deflection deformation of the crankshaft <NUM>, thereby further improving the improvement effect of wear.

Specifically, the speed of enlarging the gap <NUM> corresponding to the avoidance part <NUM> is gradually increased along the axial direction far away from the middle part of the connecting structure <NUM>.

Further, the wall surface formed by the avoidance part <NUM> comprises a curved surface.

In the embodiment, the wall surface formed by the avoidance part <NUM> comprises the curved surface, so that the change of the gap <NUM> corresponding to the avoidance part <NUM> is better matched with the shape of deflection deformation of the crankshaft <NUM>, thereby further improving the improvement effect of wear.

As shown in <FIG>, the avoidance part <NUM> is arranged on the crankshaft <NUM>, the avoidance part <NUM> is realized through the change of the diameter of the crankshaft <NUM>, and namely, the diameter of the crankshaft <NUM> becomes small after the crankshaft <NUM> is provided with the avoidance part <NUM>. The crankshaft <NUM> forms a cone at the avoidance part <NUM>, so that at the part of the crankshaft <NUM>, at which the avoidance part <NUM> is arranged, the gap <NUM> between the crankshaft <NUM> and the connecting structure <NUM> changes linearly along the axial direction.

As shown in <FIG>, the avoidance part <NUM> is arranged on the connecting structure <NUM>, the avoidance part <NUM> is realized through the change of the diameter of the connecting structure <NUM>, and namely, the diameter of the connecting structure <NUM> becomes big after the avoidance part <NUM> is arranged on the inner side wall of the connecting structure <NUM>. The inner side wall of the connecting structure <NUM> forms a cone at the avoidance part <NUM>, so that at the part of the connecting structure <NUM>, at which the avoidance part <NUM> is arranged, the gap <NUM> between the crankshaft <NUM> and the connecting structure <NUM> changes linearly along the axial direction.

As shown in <FIG>, when the flexural deflection of the crankshaft <NUM> is bigger, in order to further improve the improvement effect of wear, the avoidance part <NUM> can be a curved surface, the speed of enlarging the gap <NUM> corresponding to the avoidance part <NUM> is gradually increased along the axial direction far away from the center of kinematic pairs (far away from the middle part of the connecting structure <NUM>), and namely, the tangent line of avoidance part <NUM> and the axis of the crankshaft <NUM> gradually tend to be parallel, so that the change of the gap <NUM> corresponding to the avoidance part <NUM> is better matched with the shape of deflection deformation of the crankshaft <NUM>, so as to further improve the improvement effect of wear.

Specifically, the avoidance part <NUM> can be also arranged on the crankshaft <NUM> and the connecting structure <NUM> at the same time. The wall surface formed by the avoidance part <NUM> comprises the conical surface and the curved surface.

One embodiment according to the present application comprises the features limited by the above embodiments, and further, the avoidance part <NUM> is annular in the cross section perpendicular to the axis of the crankshaft <NUM>.

In the embodiment, the avoidance part <NUM> is annular, and the annular avoidance part <NUM> can have good avoidance effect on all directions of the crankshaft <NUM> when the crankshaft <NUM> is obliquely deformed, thereby improving the improvement effect of wear between the crankshaft <NUM> and the connecting structure <NUM> in all directions, and namely, reducing the degree of wear in all directions.

As shown in <FIG> and <FIG>, one embodiment according to the present application comprises the features limited by the above embodiments, and further, the crankshaft <NUM> comprises a main body and an eccentric part <NUM>. The main body comprises a first shaft part <NUM> and a second shaft part <NUM> that are coaxially arranged, the eccentric part <NUM> is connected with the main body, and the main body and the eccentric part <NUM> are eccentrically arranged.

In the embodiment, the crankshaft <NUM> comprises the main body and the eccentric part <NUM>, the main body comprises the first shaft part <NUM> and the second shaft part <NUM>, the first shaft part <NUM> is connected with a rotor <NUM> of a motor to drive the eccentric part <NUM> to rotate, and a suction process and an exhaust process of the compressor <NUM> are realized through the rotation of the eccentric part <NUM>.

Further, the connecting structure <NUM> comprises a first bearing <NUM>, a second bearing <NUM> and a piston <NUM>, the first bearing <NUM> is sleeved on the first shaft part <NUM>, the second bearing <NUM> is sleeved on the second shaft part <NUM>, and the piston <NUM> is sleeved on the eccentric part <NUM>.

In the embodiment, the connecting structure <NUM> comprises the first bearing <NUM>, the second bearing <NUM> and the piston <NUM>. The first bearing <NUM> is sleeved on the first shaft part <NUM>, the second bearing <NUM> is sleeved on the second shaft part <NUM>, the crankshaft <NUM> is fixed through the first bearing <NUM> and the second bearing <NUM>, the piston <NUM> is sleeved on the eccentric part <NUM>, and the piston <NUM> is driven to move through the rotation of the eccentric part <NUM>, so that the suction process and the exhaust process of the compressor <NUM> are realized.

Further, based on the condition that the avoidance part <NUM> is arranged on the crankshaft <NUM>, and the avoidance part <NUM> is arranged at the part that the first shaft part <NUM> is close to the second shaft part <NUM>, and/or the avoidance part <NUM> is arranged at the part that the first shaft part <NUM> is far away from the second shaft part <NUM>, and/or the avoidance part <NUM> is arranged at one end that the eccentric part <NUM> is close to the first bearing <NUM>, and/or the avoidance part <NUM> is arranged at one end that the eccentric part <NUM> is close to the second bearing <NUM>, and/or the avoidance part <NUM> is arranged at one end that the second shaft part <NUM> is close to the eccentric part <NUM>.

In the embodiment, when the avoidance part <NUM> is arranged on the crankshaft <NUM>, the avoidance part <NUM> is arranged at any one or the combination of the part that the first shaft part <NUM> is close to the second shaft part <NUM>, the part that the first shaft part <NUM> is far away from the second shaft part <NUM>, the end that the eccentric part <NUM> is close to the first bearing <NUM>, the end that the eccentric part <NUM> is close to the second bearing <NUM>, and the end that the second shaft part <NUM> is close to the eccentric part <NUM>.

Further, based on the condition that the avoidance part <NUM> is arranged on the connecting structure <NUM>, the avoidance part <NUM> is arranged at one end that the first bearing <NUM> is close to the second bearing <NUM>, and/or the avoidance part <NUM> is arranged at one end that the first bearing <NUM> is far away from the second bearing <NUM>, and/or the avoidance part <NUM> is arranged at one end that the piston <NUM> is close to the first bearing1040, and/or the avoidance part <NUM> is arranged at one end that the piston <NUM> is close to the second bearing <NUM>, and/or the avoidance part <NUM> is arranged at one end that the second bearing <NUM> is close to the first bearing <NUM>.

In the embodiment, when the avoidance part <NUM> is arranged on the connecting structure <NUM>, the avoidance part <NUM> is arranged at any one or the combination of the end that the first bearing <NUM> is close to the second bearing <NUM>, the end that the first bearing <NUM> is far away from the second bearing <NUM>, the end that the piston <NUM> is close to the first bearing <NUM>, the end that the piston <NUM> is close to the second bearing <NUM>, and the end that the second bearing <NUM> is close to the first bearing <NUM>.

Certainly, the avoidance part <NUM> can be also arranged on the connecting structure <NUM> and the crankshaft <NUM> at the same time.

Further, the compressor <NUM> also comprises a cylinder <NUM>, a sliding piece <NUM> and the rotor <NUM>. The cylinder <NUM> comprises a cylinder chamber, the piston <NUM> is arranged in the cylinder chamber, the crankshaft <NUM> is arranged in the cylinder chamber in a penetrating manner, a sliding piece groove is formed in the cylinder <NUM>, the sliding piece <NUM> is arranged in the sliding piece groove and is connected with the piston <NUM> in a rolling manner, and the rotor <NUM> is connected with the first shaft part <NUM>.

In the embodiment, the compressor <NUM> also comprises the cylinder <NUM>, the sliding piece <NUM> and the rotor <NUM>, the rotor <NUM> is connected with the first shaft part <NUM>, the cylinder <NUM> is provided with the cylinder chamber, the piston <NUM> is arranged in the cylinder chamber, and the crankshaft <NUM> is arranged in the cylinder chamber in a penetrating manner, wherein the sliding piece groove is formed in the cylinder <NUM>, and the sliding piece <NUM> is arranged in the sliding piece groove and is rotatably connected with the piston <NUM>, so that the suction process and the exhaust process of the compressor <NUM> are realized.

Further, the compressor <NUM> is an inverter compressor.

In the embodiment, the compressor <NUM> is the inverter compressor, the reliability of the inverter compressor can be improved in a way that the avoidance part <NUM> is arranged on the connecting structure <NUM> or the crankshaft <NUM>, and certainly, the compressor <NUM> can be also a constant speed compressor.

Further, the compressor <NUM> is filled with coolants, and the coolants are difluoromethane or propane.

In the embodiment, the compressor <NUM> is filled with the coolants, the refrigeration or heating of the refrigeration device is realized through a heat adsorption process and a heat release process of the coolants, specifically, the coolants are difluoromethane or propane, and certainly, the coolants can also be other coolants.

According to one specific embodiment of the present application, as shown in <FIG> and <FIG>, a compressor <NUM> comprises a crankshaft <NUM>, a first bearing <NUM>, a second bearing <NUM>, a cylinder <NUM>, a piston <NUM>, a sliding piece <NUM>, a balance block <NUM> arranged on a rotor <NUM> and the like, the above components form a suction chamber and a compression chamber, and the rotor <NUM> of a motor drives the crankshaft <NUM> to rotate, so that the volume of the suction chamber is enlarged, and the volume of the compression chamber is decreased, so as to realize the suction process and the exhaust process. The crankshaft <NUM> comprises a first shaft part <NUM>, a second shaft part <NUM> and an eccentric part <NUM>. The first shaft part <NUM> and the first bearing <NUM>, the second shaft part <NUM> and the second bearing <NUM>, as well as the eccentric part <NUM> and the piston <NUM> respectively form three sliding bearings, the gap <NUM> is formed between each of the shaft parts (the first shaft part <NUM>, the second shaft part <NUM> or an eccentric shaft) of the sliding bearings and the connecting structure <NUM> (the first bearing <NUM>, the second bearing <NUM> or the piston <NUM>), and the gap <NUM> is filled with lubricating oil in normal operation. The above three sliding bearings often has abnormal wear phenomena. Specifically, due to the effects of the centrifugal force generated in the rotation process of the rotor <NUM> and the magnetic pull of the motor, the center of the rotor <NUM> deviates from the axis of the motor, so as to cause deflection; and correspondingly, deflection deformation is caused on the upper end of the crankshaft <NUM>, so that the first shaft part <NUM> of the crankshaft <NUM> and the upper end of the first bearing <NUM> are in line contact, the local oil film is cracked, and the first shaft part <NUM> of the crankshaft <NUM> and the first bearing <NUM> are directly in metal contact, thereby resulting in wear. Similarly, deflection deformation is also caused on the eccentric shaft of the crankshaft <NUM> under the effect of gas force of the suction chamber and the compression chamber, so that the first shaft part <NUM> and the lower edge of the first bearing <NUM>, the second shaft part <NUM> and the upper edge of the second bearing <NUM>, as well as the eccentric shaft and the upper and lower edges of the piston <NUM> may directly be in metal contact, thereby resulting in abnormal wear. Therefore, due to the oblique deformation of the crankshaft <NUM>, normal oil films are difficultly formed on the edges of all sliding bearings, so as to form local metal contact, thereby resulting in wear. As shown in <FIG>, in the embodiment provided by the present application, the avoidance part <NUM> is arranged on the connecting structure <NUM> or at the part that the crankshaft <NUM> is matched with the connecting structure <NUM>, the gap <NUM> is formed between the connecting structure <NUM> and the crankshaft <NUM>, and the gap <NUM> at the part of the crankshaft <NUM> and the connecting structure <NUM>, which correspond to the avoidance part <NUM>, is enlarged along the direction far away from the center of the kinematic pairs, so that the original metal contact position can still keep surface contact after the deflection deformation of the crankshaft <NUM>, and normal oil films are formed, so as to avoid wear and greatly improve the reliability of the compressor <NUM>.

Specifically, a part can be removed from the crankshaft <NUM> or the connecting structure <NUM> in manners such as turning and the like, so as to form the avoidance part <NUM>, or the crankshaft <NUM> and the avoidance part <NUM> arranged on the crankshaft <NUM> are integrally manufactured, or the connecting structure <NUM> and the avoidance part <NUM> arranged on the connecting structure <NUM> are integrally manufactured.

Specifically, the minimum value of the bilateral gap <NUM> corresponding to the avoidance part <NUM> is δ<NUM>, the difference between the maximum value of the bilateral gap <NUM> corresponding to the avoidance part <NUM> and δ<NUM> is δ, the diameter of the crankshaft <NUM> corresponding to the minimum part of the bilateral gap <NUM> corresponding to the avoidance part <NUM> is D, the length of the avoidance part <NUM> is h along the axial direction of the crankshaft <NUM>, and the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>. As shown in <FIG> is the curve chart of the affection of the corresponding dimension of the avoidance part <NUM> of the sliding bearings on the minimum oil film thickness, wherein the horizontal axis adopts the logarithmic coordinates, the carrying capacity of the oil films of the sliding bearings can be represented by the minimum oil film thickness, the bigger the minimum oil film thickness is, the higher the carrying capacity of the oil films is, and the wear is not easily caused on the sliding bearings. As shown in <FIG>, when the dimension of the avoidance part <NUM> satisfies the condition that the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>, the improvement effect of wear is the best.

Further, the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>, and h is more than or equal to <NUM> and less than or equal to <NUM>.

As shown in <FIG>, according to one specific embodiment of the present application, a compressor <NUM> provided by the present application comprises a crankshaft <NUM> and a connecting structure <NUM>. The crankshaft <NUM> comprises a first shaft part <NUM>, a second shaft part <NUM> and an eccentric part <NUM>. The connecting structure <NUM> comprises a first bearing <NUM>, a second bearing <NUM> and a piston <NUM>. The first bearing <NUM> is sleeved on the first shaft part <NUM>, the second bearing <NUM> is sleeved on the second shaft part <NUM>, and the piston <NUM> is sleeved on the eccentric part <NUM>. In the present embodiment, avoidance parts <NUM> are arranged on the crankshaft <NUM>, specifically, the avoidance parts <NUM> are respectively arranged at the part that the upper end of the first bearing <NUM> corresponds to the first shaft part <NUM>, at the part that the lower end of the first bearing <NUM> corresponds to the first shaft part <NUM>, at the part that the upper end of the second bearing <NUM> corresponds to the second shaft part <NUM>, at the part that the upper end of the piston <NUM> corresponds to an eccentric shaft, and at the part that the lower upper end of the piston <NUM> corresponds to the eccentric shaft, the shape of the avoidance parts <NUM> is a conical surface, and the specific dimension of any of the avoidance parts <NUM> satisfies the condition that the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>, wherein h1, h2, h3, h4 and h4 in <FIG> respectively represent the axial height of the avoidance parts <NUM>.

As shown in <FIG>, according to one specific embodiment of the present application, a compressor <NUM> provided by the present application comprises a crankshaft <NUM> and a connecting structure <NUM>. The crankshaft <NUM> comprises a first shaft part <NUM>, a second shaft part <NUM> and an eccentric part <NUM>. The connecting structure <NUM> comprises a first bearing <NUM>, a second bearing <NUM> and a piston <NUM>. The first bearing <NUM> is sleeved on the first shaft part <NUM>, the second bearing <NUM> is sleeved on the second shaft part <NUM>, and the piston <NUM> is sleeved on the eccentric part <NUM>. In the present embodiment, avoidance parts <NUM> are arranged on the connecting structure <NUM>, specifically, the avoidance parts <NUM> are respectively arranged the upper end and the lower end of the first bearing <NUM>, the upper end of the second bearing <NUM>, as well as the upper end and the lower end of the piston <NUM>, the shape of the avoidance parts <NUM> is a curved surface, and the specific dimension of any of the avoidance parts <NUM> satisfies the condition that the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>, wherein h1, h2, h3, h4 and h4 in <FIG> respectively represent the axial height of the avoidance parts <NUM>.

According to the second aspect of the present application, the present application also provides refrigeration device, which comprises the compressor <NUM> provided by any of the above embodiments.

The refrigeration device provided by the second aspect of the present application comprises the compressor <NUM> provided by any of the above embodiments, therefore, the refrigeration device has all beneficial effects of the compressor <NUM>.

Specifically, the refrigeration device comprises a heat exchanger, the heat exchanger is communicated with the compressor <NUM> by a pipeline, and the coolants can flow in the pipeline.

In the present application, the term "a plurality of" refers to two or more, unless explicitly defined otherwise. The terms such as "installation", "connected", "connecting", "fixation" and the like shall be understood in broad sense, and for example, "connecting" may be a fixed connection, a detachable connection, or an integral connection; "connected" may be directly connected, or indirectly connected through an intermediary. The specific meaning of the above terms in the present application will be understood by those of ordinary skills in the art, as the case may be.

In the illustration of the description, the illustration of the terms of "one embodiment", "some embodiments", "specific embodiment", etc. means that the specific features, structures, materials, or features described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this description, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claim 1:
A compressor (<NUM>), comprising: a crankshaft (<NUM>); and a connecting structure (<NUM>) arranged on the crankshaft (<NUM>), the connecting structure (<NUM>) comprises a first bearing (<NUM>), a second bearing (<NUM>) and a piston (<NUM>), wherein an avoidance part (<NUM>) is arranged on the connecting structure (<NUM>) and/or the crankshaft (<NUM>), the avoidance part (<NUM>) is located at the part that the connecting structure (<NUM>) is matched with the crankshaft (<NUM>), and the avoidance part (<NUM>) is configured to be suitable for avoiding at least one of the connecting structure (<NUM>) and the crankshaft (<NUM>);
wherein a gap (<NUM>) is formed between the crankshaft (<NUM>) and the connecting structure (<NUM>), and the gap (<NUM>) corresponding to the avoidance part (<NUM>) is enlarged to the direction far away from the middle part of the connecting structure (<NUM>) along the axial direction of the crankshaft (<NUM>); and
characterised in that the sum of gaps at the two sides of the axis of the crankshaft (<NUM>) is defined as a bilateral gap at the same axial height in the cross section of the compressor in the axial direction of the crankshaft (<NUM>); the minimum value of the bilateral gap corresponding to the avoidance part (<NUM>) is δ<NUM>, the difference between the maximum value of the bilateral gap corresponding to the avoidance part (<NUM>) and δ<NUM> is δ, the diameter of the crankshaft (<NUM>) corresponding to the minimum part of the bilateral gap corresponding to the avoidance part (<NUM>) is D, and the length of the avoidance part (<NUM>) is h along the axial direction of the crankshaft (<NUM>), wherein the product of δ/δ<NUM> and D/h is more than or equal to <NUM> and less than or equal to <NUM>.