CN114215748A

CN114215748A - Compressor and air conditioner

Info

Publication number: CN114215748A
Application number: CN202111427844.0A
Authority: CN
Inventors: 武晓昆; 龙忠铿; 毕雨时; 唐晗
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-03-22

Abstract

The embodiment of the invention provides a compressor, which comprises a first rotor, a second rotor, a first air passage, a second air passage and an air outlet, wherein the first rotor and the second rotor are arranged in a meshed mode, the first rotor comprises a first end and a second end which are arranged oppositely, the air outlet is arranged on one side of the first rotor, and the first air passage and the second air passage are different in structure so as to form a preset acting force with the first end facing the second end or the second end facing the first end on the first rotor. The compressor and the air conditioner provided by the embodiment of the invention can realize axial force orientation by arranging the first air passage and the second air passage in a difference manner, and only one thrust bearing is required to be arranged at one end subjected to a preset acting force, so that the size of the compressor is reduced, and the cost can be saved.

Description

Compressor and air conditioner

Technical Field

The invention relates to the technical field of compressors, in particular to a compressor and an air conditioner.

Background

The compressor is generally arranged with a pair of parallel screw rotors placed in the spatial volume of the casing of the screw compressor. The space volume of the pair of screw rotors is periodically increased and decreased during the rotation process, so that the space volume is periodically communicated with and closed off the air inlet and the air outlet, and the processes of air suction, compression and air exhaust can be completed.

This to spiral rotor is at rotatory in-process, can form the axial force of two opposite directions along the rotatory axial direction of spiral rotor, because technical limitation and manufacturing error, the opposite axial force size of two axial directions that the spiral rotor is rotatory to be produced also has difference, consequently can't cancel each other completely, leads to spiral rotor can receive along the axial but a power of uncertain direction, consequently need set up thrust bearing at spiral rotor both ends, and occupation space is great, and the cost is higher.

Disclosure of Invention

The embodiment of the invention provides a compressor and an air conditioner, which can orient the axial force of a rotor in the compressor due to rotation.

An embodiment of the present invention provides a compressor, including:

a first rotor and a second rotor, the first rotor including first and second oppositely disposed portions, the first rotor being rotatable along a first axis, the second rotor including third and fourth oppositely disposed portions, the second rotor being rotatable along a second axis, the first and second rotors being in meshing engagement;

a first exhaust port and a second exhaust port, the first rotor including a first end and a second end disposed opposite to each other, the first exhaust port being located at a position where the first rotor and the second rotor are engaged and near the first end, the second exhaust port being located at a position where the first rotor and the second rotor are engaged and near the second end; and

first air flue, second air flue and gas outlet, the both ends of first air flue are connected respectively first gas vent with the gas outlet, the both ends of second air flue are connected respectively the second gas vent with the gas outlet, the gas outlet is located one side of first rotor, first air flue with the structure of second air flue is different, in order to right first rotor forms first end orientation the second end or the second end orientation the effort of predetermineeing of first end.

In an optional embodiment of the present invention, the air inlet is located on a side of the first rotor away from the air outlet.

In an alternative embodiment of the invention, the length of the first air passage is different from the length of the second air passage.

In an alternative embodiment of the invention, the width of the first air passage is different from the width of the second air passage.

In an optional embodiment of the present invention, the length of the first air passage is longer than the length of the second air passage, and the width of the first air passage is smaller than the width of the second air passage; or the length of the first air passage is shorter than that of the second air passage, and the width of the first air passage is larger than that of the second air passage.

In an optional embodiment of the present invention, the first air passage includes a plurality of concave portions and a plurality of convex portions, and the concave portions and the convex portions are arranged at intervals; or the second air passage comprises a plurality of concave parts and a plurality of convex parts, and the concave parts and the convex parts are arranged at intervals.

In an optional embodiment of the present invention, at least one of the first portion and the second portion is provided with an air supplement hole, and the air supplement hole can assist the first rotor in air supplement.

In an optional embodiment of the present invention, the first portion has a first air supplement hole, the second portion has a second air supplement hole, and the number of the first air supplement holes is different from the number of the second air supplement holes.

In an optional embodiment of the present invention, the apparatus further comprises a thrust bearing, the thrust bearing is located at an end of the first portion away from the second portion or an end of the second portion away from the first portion, and the predetermined force is applied to the thrust bearing.

The embodiment of the invention also provides an air conditioner, which comprises the compressor.

According to the compressor and the air conditioner, the first air passage and the second air passage are arranged differently to realize axial force orientation, namely the direction of the preset acting force is determined, and only one thrust bearing is arranged at one end subjected to the preset acting force, so that the size of the compressor is reduced, and the cost is saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts in the following description.

Fig. 1 is a partial schematic view of a first compressor according to an embodiment of the present invention.

Fig. 2 is a partial schematic view of a second compressor according to an embodiment of the present invention.

Fig. 3 is a partial schematic view of a third compressor according to an embodiment of the present invention.

Fig. 4 is a partial schematic view of a fourth compressor according to an embodiment of the present invention.

Fig. 5 is a partial schematic view of a fifth compressor according to an embodiment of the present invention.

Fig. 6 is a partial schematic view of a sixth compressor according to an embodiment of the present invention.

10. A first rotor; 101. a first portion; 102. a second portion; 1011. a first air supply hole; 1022. a second air supply hole;

20. a second rotor; 203. a third portion; 204. a fourth part;

30. an air inlet;

40. an air outlet;

501. a first exhaust port; 502. a first air passage; 503. a recessed portion; 504. a boss portion; 505. a second exhaust port; 506. a second air passage;

60. a housing.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses, but rather, any other embodiment obtained by those skilled in the art without making any inventive changes in the invention or the claims.

Reference herein to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The embodiment of the invention provides a compressor and an air conditioner, and aims to solve the problem that thrust bearings are required to be arranged at two ends of a rotor of the compressor due to uncertain axial force directions.

The compressor provided by the embodiment of the invention can be applied to an air conditioner, and particularly, the compressor in the embodiment of the invention can be a screw compressor, a scroll compressor and the like. In the embodiment of the invention, the compressor comprises a shell 60, a first rotor 10, a second rotor 20, a first air passage 502, a second air passage 506, an air inlet 30 and an air outlet 40, wherein the first rotor 10 and the second rotor 20 are accommodated in the shell 60, the first rotor 10 comprises a first part 101 and a second part 102 which are oppositely arranged, the first rotor 10 can rotate along a first axis, the second rotor 20 comprises a third part 203 and a fourth part 204 which are oppositely arranged, the second rotor 20 can rotate along a second axis, and the first rotor 10 and the second rotor 20 are arranged in a meshed mode. The first rotor 10 includes a first end (not shown) and a second end (not shown) which are oppositely disposed, the first exhaust port 501 is located at a position where the first rotor 10 and the second rotor 20 are engaged and close to the first end, and the second exhaust port 505 is located at a position where the first rotor 10 and the second rotor 20 are engaged and close to the second end. The two ends of the first air passage 502 are respectively connected with the first exhaust port 501 and the air outlet 40, the two ends of the second air passage 506 are respectively connected with the second exhaust port 505 and the air outlet 40, the air outlet 40 is positioned at one side of the first rotor 10, wherein the first air passage 502 and the second air passage 506 have different structures.

Referring to fig. 1, fig. 1 is a partial schematic view of a first compressor according to an embodiment of the present invention. In the embodiment of the present invention, the air inlet 30 and the air outlet 40 are respectively disposed on the housing 60, the air outlet 40 is located on one side of the first rotor 10, and the air inlet 30 is located on one side of the first rotor 10 away from the air outlet 40. The two ends of the first air passage 502 are respectively connected with the first exhaust port 501 and the air outlet 40, the two ends of the second air passage 506 are respectively connected with the second exhaust port 505 and the air outlet 40, and the structures of the first air passage 502 and the second air passage 506 are different so as to form a preset acting force of the first end towards the second end or the second end towards the first end for the first rotor 10. Specifically, in this embodiment, when the compressor is operated, gas enters the compressor housing 60 from the gas inlet 30, and then the first rotor 10 and the second rotor 20 rotate in a meshing manner, so that the gas is collected to the gas outlet 40 through the first gas outlet 501 and the second gas outlet 505 and then is discharged out of the housing 60, thereby completing the processes of gas suction, compression and gas discharge of the compressor.

Theoretically, when the compressor is operated, the first rotor 10 and the second rotor 20 are engaged to rotate, and when the gas is discharged from the first gas outlet 501 and the second gas outlet 505 after being compressed by the rotors, an axial force along the first axis opposite to the discharge direction is generated on the first part 101 and the second part 102, and the axial forces generated by the first part 101 and the second part 102 are opposite, so that the axial forces can almost cancel each other in the operation of the compressor. However, in the actual production and machining processes, it is found that due to certain technical limitations and manufacturing errors, there is a certain difference in the fit between the first portion 101 and the second portion 102 of the first rotor 10, and thus the two opposite acting forces along the first axis received by the first rotor 10 are different in magnitude, so that the opposite axial forces between the first portion 101 and the second portion 102 cannot be completely cancelled, and the direction of the resultant force finally received by the first rotor 10 cannot be specifically determined. In the process of mass production of compressor products, because the final direction of resultant axial force cannot be determined, the whole shaft system may be randomly pushed to one of the two exhaust end surfaces, which causes contact and friction between the exhaust end surface of the rotor and the end surface of the casing 60, and causes a failure, in order to avoid the failure, thrust bearings (not shown) are required to be arranged at both ends of the first rotor 10, the thrust bearings can be used for limiting the resultant axial force of the rotor in the compressor, and the exhaust end surfaces of the rotor can be prevented from contacting the end surface of the casing 60, so as to ensure the stable operation of the compressor. However, due to the arrangement, only one thrust bearing is used for limiting when the compressor runs, the thrust bearing at the other end is idle, redundant mechanical loss and lubricating oil demand are brought, a certain structural space of the compressor is occupied, the running efficiency of the compressor is reduced, and the cost is increased.

Because the pressure losses of the air passages with different structures are different, in the embodiment of the present invention, by setting the structures of the first air passage 502 and the second air passage 506 differently, the reaction force generated by the first exhaust port 501 and the second exhaust port 505 in the exhaust process can be greater than the threshold value of the force generated by the manufacturing error, so that the resultant axial force applied to the first rotor 10 along the first axial direction can determine the direction, and therefore, only one thrust bearing needs to be arranged in the direction of the resultant force finally applied to the compressor, and the resultant force applied to the compressor is finally applied to the thrust bearing, so that the thrust bearing can limit the resultant axial force, and reduce the friction between the exhaust end face of the rotor and the housing 60.

In order to more clearly describe the structure of the compressor according to the embodiment of the present invention, the compressor will be described below with reference to the accompanying drawings.

In an exemplary operation of the compressor, gas enters the compressor through the gas inlet 30, is compressed by the rotor, is discharged through the first gas outlet 501 and the second gas outlet 505 at both ends of the rotor, and is converged to the gas outlet 40 through the first gas passage 502 and the second gas passage 506 to be discharged out of the compressor.

Referring to fig. 1, in the embodiment of the present invention, the length of the first air passage 502 is different from the length of the second air passage 506. Specifically, the length of the first air duct 502 is longer than that of the second air duct 506, the exhaust ports are arranged towards the side close to the second part 102, so that the path length of the gas from the first exhaust port 501 to the gas outlet 40 through the first air duct 502 is longer than the path length of the gas from the second exhaust port 505 to the gas outlet 40 through the second air duct 506, the gas exhausted from the first exhaust port 501 has a longer path, and therefore, compared with the gas exhausted from the second exhaust port 505, the gas is subjected to larger pressure loss, the axial force generated by the first exhaust port 501 towards the second part 102 is smaller than the axial force generated by the second exhaust port 505 towards the first part 101, so as to orient the axial force, and the axial force is the direction of the second part 102 towards the first part 101. After the axial force is oriented, the direction of the preset acting force formed by the rotor can also be determined, namely the direction of the second end facing the first end, and then a thrust bearing can be arranged at the end of the first part 101 far away from the second part 102 to limit the resultant force in the direction, and the thrust bearing does not need to be arranged in the opposite direction, namely the opposite direction of the resultant force. Of course, the length of the first air passage 502 may be smaller than the length of the second air passage 506, so that the preset force applied to the rotor is oriented in the direction from the first end to the second end.

It should be noted that, in order to make the length of the first air passage 502 longer than the length of the second air passage 506, the air outlet 40 may be disposed toward the side close to the second portion 102, or other manners may be used, for example, the air passage structure of the first air passage 502 is folded in the direction away from the first rotor 10, so as to extend the path length of the first air passage 502, and the position of the air outlet 40 does not need to be adjusted.

For example, please refer to fig. 2 in an alternative embodiment of the present invention, and fig. 2 is a partial schematic view of a second compressor according to an embodiment of the present invention. Wherein, the width of the first air passage 502 is different from the width of the second air passage 506. Specifically, the width of the first air passage 502 is smaller than the width of the second air passage 506, so that it is difficult for the gas to reach the gas outlet 40 from the first gas outlet 501 through the first air passage 502, and the pressure loss is larger, the axial force generated when the gas reaches the gas outlet 40 from the second gas outlet 505 through the second air passage 506 can be larger than the axial force generated by the first gas outlet 501, so that the resultant axial force is oriented in the direction in which the second part 102 faces the first part 101, the preset acting force generated by the rotor is also in the direction in which the second end faces the first end, and a thrust bearing is arranged at the end of the first part 101 away from the second part 102. Of course, the width of the first air passage 502 may be larger than the width of the second air passage 506, so that the preset force applied to the rotor is oriented in the direction from the first end to the second end.

For example, please refer to fig. 3 in an alternative embodiment of the present invention, and fig. 3 is a partial schematic view of a third compressor according to the embodiment of the present invention. The lengths and widths of the first air passage 502 and the second air passage 506 are different, so that the axial force generated by the first exhaust port 501 and the second exhaust port 505 is more significantly different, and the axial force applied to the first rotor 10 is oriented. Specifically, the length of the first air passage 502 is longer than the length of the second air passage 506, and the width of the first air passage 502 is smaller than the width of the second air passage 506, thus, the gas from the first exhaust port 501 to the gas outlet 40 via the first gas passage 502 not only needs to pass through a longer path, but also has a smaller width of the second gas passage 506, the total pressure loss of the gas from the first exhaust port 501 to the gas outlet 40 is larger than the pressure loss of the gas from the second exhaust port 505 to the gas outlet 40, the first part 101 is thus subjected to a smaller axial force from the first part 101 towards the second part 102 than the second part 102 is subjected to an axial force from the second part 102 towards the first part 101, to direct the axial force in the direction of the second part 102 towards the first part 101, the preset force created by the rotor is also in the direction of the second end towards the first end, a thrust bearing may be provided at the end of the first part 101 remote from the second part 102. Of course, it is also possible that the length of the first air passage 502 is shorter than the length of the second air passage 506, and the width of the first air passage 502 is greater than the width of the second air passage 506, so that the predetermined force exerted on the rotor is oriented in a direction from the first end toward the second end.

For example, please refer to fig. 4 in an alternative embodiment of the present invention, and fig. 4 is a partial schematic view of a fourth compressor according to the embodiment of the present invention. Wherein the first air passage 502 comprises a plurality of concave parts 503 and a plurality of convex parts 504, the concave parts 503 and the convex parts 504 are arranged at intervals, so that the whole first air passage 502 is uneven and the air passage path is longer, thus, the path length of the gas from the first exhaust port 501 to the gas outlet 40 through the first gas passage 502 is longer than the path length of the gas from the second exhaust port 505 to the gas outlet 40 through the second gas passage 506, so that the pressure loss of the gas through the first gas passage 502 is larger, and the relief structure in the first gas duct 502 further increases the pressure loss experienced by the gas as it passes through the first gas duct 502, the axial force generated by the first exhaust port 501 is therefore less than the axial force generated by the second exhaust port 505 to create a predetermined force on the rotor toward the first end at the second end, and, therefore, a thrust bearing may be provided at the end of the first part 101 remote from the second part 102. Of course, the first air passage 502 is not provided with the concave portion 503 and the convex portion 504, and it is also possible to provide the concave portion 503 and the convex portion 504 on the second air passage 506, so that the preset acting force finally generated on the rotor is the direction from the first end to the second end, and a thrust bearing is provided at the end of the second part 102 far from the first part 101.

For example, please refer to fig. 5 in an alternative embodiment of the present invention, and fig. 5 is a partial schematic view of a fifth compressor according to the embodiment of the present invention. The first air passage 502 and the second air passage 506 have different structures, and at least one of the first portion 101 and the second portion 102 is provided with an air supply hole, which can assist the first rotor 10 in supplying air to form a preset acting force on the rotor when the compressor is in operation. Specifically, the first air passage 502 is longer than the second air passage 506, and the second portion 102 is provided with the second air replenishing hole 1022, so that an air pressure difference is generated between the first rotor 10 and the second rotor 20 in the rotation process to form an axial force of the second end toward the first end, and because the first air passage 502 is longer than the second air passage 506, the pressure loss of the first exhaust port 501 is greater than that of the second exhaust port 505, so that an axial force of the second portion 102 toward the first portion 101 is generated, and the axial force generated by the second air replenishing hole 1022 is in the same direction, so that a preset acting force of the second end toward the first end is formed on the rotor by resultant force, and therefore, a thrust bearing is provided at one end of the first portion 101 away from the second portion 102. It is of course also possible to arrange the first air duct 502 shorter than the second air duct 506 and to provide additional air openings in the first part 101, so that the predetermined force exerted on the rotor is directed in the direction from the first end towards the second end.

For example, please refer to fig. 6 in an alternative embodiment of the present invention, and fig. 6 is a partial schematic view of a sixth compressor according to the embodiment of the present invention. The first air passage 502 and the second air passage 506 have different structures, and the first portion 101 and the second portion 102 are both provided with air supply holes, but the number of the first air supply holes 1011 is different from the number of the second air supply holes 1022, so that the air pressure difference generated during the rotation of the first rotor 10 and the second rotor 20 is different, so as to form a preset acting force on the first rotor 10. Specifically, the first air passage 502 is longer than the second air passage 506, the first portion 101 has a smaller number of first gas filling holes 1011 than the second portion 102 has a smaller number of second gas filling holes 1022, therefore, the air pressure difference is generated between the first rotor 10 and the second rotor 20 during the rotation process because the air compensation amount of the second air compensation hole 1022 is greater than that of the first air compensation hole 1011, and an axial force is generated toward the first end from the second end, and since the first air passage 502 is longer than the second air passage 506, the pressure loss of the first exhaust port 501 is larger than that of the second exhaust port 505, therefore, the axial force of the second portion 102 toward the first portion 101 is generated, and the resultant of the axial forces generated by the first gas filling hole 1011 and the second gas filling hole 1022 is in the same direction, so as to form a predetermined acting force of the second end toward the first end to the rotor by the resultant force, it is sufficient to provide a thrust bearing at the end of the first part 101 remote from the second part 102. Of course, it is also possible to arrange the first air passage 502 to be shorter than the second air passage 506, and to provide a greater number of first louvers 1011 than second louvers 1022 provided in the second portion 102 of the first portion 101, so that the predetermined force applied to the rotor is directed in a direction from the first end toward the second end.

It should be noted that the embodiment with different lengths of the air passages, the embodiment with different widths of the air passages, the embodiment with the concave portion 503 and the convex portion 504 provided in the air passages, and the embodiment with the air replenishing holes provided on the rotor may be used in combination, as long as the scheme of the preset acting force can be finally determined.

Embodiments of the present invention also provide an air conditioner including a compressor as defined in combination with one or more of the above embodiments.

In the embodiment of the invention, the first air passage 502 and the second air passage 506 are arranged differently to realize axial force orientation, namely, the direction of the preset acting force is determined, and only one thrust bearing is required to be arranged at one end subjected to the preset acting force. Meanwhile, the machine always keeps the axial force facing to the preset direction in the running process due to the technology of axial force orientation, and the running stability of the machine is further ensured. Therefore, under the condition of ensuring the stable operation of the machine, the whole size of the screw compressor can be reduced, and the cost is saved. In addition, the embodiment of the invention can reduce the thrust bearing, further reduce the machine loss and the demand of lubricating oil, further reduce the failure rate of the compressor and prolong the service life of the compressor.

The compressor and the air conditioner provided by the embodiment of the present invention are described in detail above, and the principle and the embodiment of the present invention are explained herein by applying a specific example, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A compressor, comprising:

2. The compressor of claim 1, further comprising an air inlet on a side of the first rotor remote from the air outlet.

3. The compressor of claim 1, wherein the length of the first gas passage is different from the length of the second gas passage.

4. The compressor of claim 1, wherein a width of the first gas passage is different from a width of the second gas passage.

5. The compressor of claim 1, wherein the length of the first gas passage is longer than the length of the second gas passage, and the width of the first gas passage is smaller than the width of the second gas passage; or the length of the first air passage is shorter than that of the second air passage, and the width of the first air passage is larger than that of the second air passage.

6. The compressor of claim 1, wherein the first air passage includes a plurality of recesses and a plurality of protrusions, the recesses and the protrusions being spaced apart from each other; or the second air passage comprises a plurality of concave parts and a plurality of convex parts, and the concave parts and the convex parts are arranged at intervals.

7. The compressor of claim 1, wherein at least one of the first portion and the second portion defines an air supplement hole, and the air supplement hole is configured to assist in air supplement of the first rotor.

8. The compressor of claim 7, wherein the first portion defines a first plurality of supply holes and the second portion defines a second plurality of supply holes, the number of the first plurality of supply holes being different than the number of the second plurality of supply holes.

9. The compressor of claim 1, further comprising a thrust bearing located at one end of the first portion remote from the second portion or at one end of the second portion remote from the first portion, the predetermined force being applied to the thrust bearing.

10. An air conditioner characterized by comprising the compressor of any one of claims 1 to 9.