CN214837127U

CN214837127U - Rotary compressor and refrigeration equipment

Info

Publication number: CN214837127U
Application number: CN202120157377.3U
Authority: CN
Inventors: 林淑敏; 张洋洋
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-11-23
Anticipated expiration: 2031-01-20

Abstract

The utility model discloses a rotary compressor and refrigeration plant, wherein, the rotary compressor includes casing, separator, cylinder and oil return device, the separator locates in the casing, and separate the casing into compressor chamber and liquid storage chamber; the air cylinder is arranged in the compressor cavity and is provided with an air suction port; the oil return device comprises an air suction pipe and an oil suction pipe, the air suction pipe is communicated with the liquid storage cavity and the air suction port, the upper end of the oil suction pipe extends into the air suction pipe, and the lower end of the oil suction pipe is located at the bottom of the liquid storage cavity. The utility model discloses a rotary compressor has improved the oil return rate, has reduced the oil mass of telling to rotary compressor's reliability has been promoted.

Description

Rotary compressor and refrigeration equipment

Technical Field

The utility model relates to a refrigeration plant technical field, in particular to rotary compressor and refrigeration plant.

Background

At present, a rotary refrigeration compressor adopts a mode that a liquid storage device is separately arranged on one side of a compressor main body externally and is connected into a whole through a copper bent pipe to form a refrigerant circulation loop, and a copper pipe is connected to corresponding refrigerant channels of a condenser, an evaporator and the like in a welded mode at an inlet/outlet of a refrigerant, so that the whole size of the compressor is large and the occupied space is large. In the related art, in order to miniaturize the compressor, a reservoir is built in. However, although the overall size of the compressor can be reduced by adopting the method, the problem of poor oil return exists, the oil output of the compressor is large, and the reliability of the compressor is seriously influenced.

The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a rotary compressor aims at solving current rotary compressor and has the technical problem that the oil return is not smooth.

In order to achieve the above object, the present invention provides a rotary compressor, including:

a housing;

the separator is arranged in the shell and divides the shell into a compressor cavity and a liquid storage cavity;

the air cylinder is arranged in the compressor cavity and provided with an air suction port; and

the oil return device comprises an air suction pipe and an oil suction pipe, the air suction pipe is communicated with the liquid storage cavity and the air suction port, the upper end of the oil suction pipe extends into the air suction pipe, and the lower end of the oil suction pipe is located at the bottom of the liquid storage cavity.

In one embodiment, the rotary compressor further comprises an auxiliary bearing, the auxiliary bearing is arranged in the compressor cavity and located below the cylinder, and the auxiliary bearing is provided with an installation through hole communicated with the air suction port;

the air suction pipe extends along the up-down direction, the air suction pipe is installed in the installation through hole, and the lower end of the air suction pipe penetrates through the separating piece and is communicated with the liquid storage cavity.

In an embodiment, the air suction pipe comprises a first pipe section, a second pipe section and a connecting pipe section for connecting the first pipe section and the second pipe section, wherein the connecting pipe section is arranged from top to bottom in a gradually expanding manner.

In an embodiment, the oil return device further includes a heat insulation pipe, the heat insulation pipe is sleeved outside the air suction pipe, and a heat insulation gap is formed between the heat insulation pipe and the air suction pipe.

In an embodiment, a groove is formed in the lower surface of the secondary bearing, the groove is located on the periphery of the installation through hole, the upper end of the heat insulation pipe is embedded in the groove, and the lower end of the heat insulation pipe is connected with the air suction pipe in a sealing mode.

In an embodiment, a heat shield is arranged in the liquid storage cavity, a first through hole for the air suction pipe to pass through is formed in the upper end of the heat shield, and a second through hole for the oil suction pipe to pass through is formed in the lower end of the heat shield.

In an embodiment, a first oil suction hole is formed in the lower end of the oil suction pipe, is located in the heat insulation cover and is arranged corresponding to the bottom of the heat insulation cover, and is used for sucking oil at the bottom of the heat insulation cover.

In an embodiment, a second oil suction hole is formed in the lower end of the oil suction pipe, and the second oil suction hole is located below the heat shield and used for sucking oil at the bottom of the liquid storage cavity.

In one embodiment, the casing is provided with an air outlet corresponding to the liquid storage cavity, the air suction pipe extends along the horizontal direction and is installed at the air outlet, one end of the air suction pipe is communicated with the liquid storage cavity, and the other end of the air suction pipe is communicated with the air suction port through a connecting pipe.

In one embodiment, a heat shield is arranged in the liquid storage cavity, an installation through hole is formed in one side, close to the exhaust port, of the heat shield, and the air suction pipe penetrates through the installation through hole to be communicated with the liquid storage cavity.

In one embodiment, a heat insulation layer is arranged on the inner wall surface of the liquid storage cavity.

In one embodiment, the housing is provided with an air inlet communicated with the liquid storage cavity, and a flow guide member is arranged at the air inlet and used for guiding the intake air flow to the inner wall surface of the liquid storage cavity.

In one embodiment, the liquid storage cavity is located below the compressor cavity, and a ratio of a height of the liquid storage cavity to a height of the housing is greater than or equal to 0.05 and less than or equal to 0.3.

In one embodiment, the rotary compressor comprises a filter assembly, and the filter assembly is arranged in the liquid storage cavity;

and/or the rotary compressor comprises a gas-liquid separation assembly, and the gas-liquid separation assembly is arranged in the liquid storage cavity.

In an embodiment, the rotary compressor comprises a main bearing, the main bearing is arranged in the compressor cavity and above the cylinder, the main bearing, the auxiliary bearing and the cylinder jointly define a compression cavity, and the suction port is communicated with the compression cavity.

The utility model discloses still provide a refrigeration plant, including rotary compressor, wherein, rotary compressor includes:

a housing;

The utility model discloses a rotary compressor, which comprises a shell, a separator, a cylinder and an oil return device, wherein the separator is arranged in the shell and divides the shell into a compressor cavity and a liquid storage cavity; the air cylinder is arranged in the compressor cavity and is provided with an air suction port; the oil return device comprises an air suction pipe and an oil suction pipe, the air suction pipe is communicated with the liquid storage cavity and the air suction port, the upper end of the oil suction pipe extends into the air suction pipe, and the lower end of the oil suction pipe is positioned at the bottom of the liquid storage cavity; so, refrigerant mixture among the refrigerating system (the mixture of gaseous state refrigerant and oil) gets into the stock solution chamber after, the gaseous state refrigerant is inhaled in the breathing tube, and oil flows to the bottom in stock solution chamber under the effect of gravity, and flow to the oil of stock solution chamber bottom in by the suction oil pipe to in via the oil suction pipe flow to the breathing tube, later get into under the drive of the high velocity air flow of gaseous state refrigerant in the suction opening of cylinder, get into the compression intracavity of cylinder by the suction opening at last, thereby improved the oil return rate, reduced the oil mass of telling, thereby promoted rotary compressor's reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of a rotary compressor according to the present invention;

fig. 2 is an internal detailed view of the rotary compressor of fig. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a sectional view of the rotary compressor of fig. 1;

fig. 5 is a schematic structural view of another embodiment of the rotary compressor of the present invention;

fig. 6 is an assembled detail view of the oil return device of fig. 5.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)	Reference numerals	Name (R)
						100	Rotary compressor	126	Flow guiding piece	165	Oil suction pipe
110	Shell body	130	Cylinder	166	First oil suction hole
						111	Upper end cap	131	Air suction inlet	167	Second oil suction hole
112	First shell	140	Main bearing	168	Heat insulation pipe
						113	Second shell	150	Secondary bearing	169	Heat insulation gap
114	Lower end cap	151	Mounting through hole	170	Heat shield
						120	Separator	152	Groove	171	First cover body
121	Compressor cavity	160	Oil return device	172	Second cover body
						122	Liquid storage cavity	161	Air suction pipe	180	Crankshaft
123	Air inlet	162	First pipe section	181	Piston
						124	Exhaust port	163	Second pipe section	182	Electric machine
125	Connecting pipe	164	Connecting pipe section	190	Oil pool

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be noted that if the embodiments of the present invention are described with reference to "first", "second", etc., the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.

The utility model provides a rotary compressor. The rotary compressor can be a single-cylinder single-row compressor, a single-cylinder double-row compressor, a double-cylinder compressor and the like.

Referring to fig. 1 to 5, the present invention provides a rotary compressor 100, wherein the rotary compressor 100 includes a housing 110, a partition 120, a cylinder 130 and an oil return device 160. The partition 120 is disposed in the housing 110 and divides the housing 110 into a compressor chamber 121 and a reservoir chamber 122; the cylinder 130 is arranged in the compressor cavity 121, and an air suction port 131 is arranged on the cylinder 130; the oil return device 160 includes an air suction pipe 161 and an oil suction pipe 165, the air suction pipe 161 communicates the liquid storage cavity 122 with the air suction port 131, the upper end of the oil suction pipe 165 extends into the air suction pipe 161, and the lower end of the oil suction pipe 165 is located at the bottom of the liquid storage cavity 122.

Specifically, the housing 110 may be integrally formed, or may be separately formed, for example, the housing 110 includes an upper end cap 111, a first housing 112, a second housing 113, and a lower end cap 114, which are sequentially connected from top to bottom. The partition 120 is disposed in the housing 110, the partition 120, the first housing 112 and the upper end cap 111 enclose the compressor cavity 121, and the partition 120, the second housing 113 and the lower end cap 114 enclose the reservoir cavity 122. That is, the reservoir chamber 122 is located below the compressor chamber 121, but is not limited thereto, and the reservoir chamber 122 may be located at one side of the compressor chamber 121. The partition 120 may be a partition plate, and the partition plate may be disposed in a flat plate shape, or may be disposed in an arc plate shape, which is not limited herein. By disposing the liquid storage cavity 122 below the compressor cavity 121, the internal structure of the rotary compressor 100 is compact, the occupied space of the whole rotary compressor 100 is reduced, and the rotary compressor 100 is advantageously miniaturized.

Without loss of generality, the rotary compressor 100 further includes a main bearing 140, a secondary bearing 150, a crankshaft 180, a piston 181, and a motor 182 disposed within the compressor cavity 121. The main bearing 140 is disposed above the cylinder 130, the sub bearing 150 is disposed below the cylinder 130, the main bearing 140, the sub bearing 150, and the cylinder 130 together define a compression chamber, and the cylinder 130 is formed with an air suction port 131 communicated with the compression chamber. The piston 181 is sleeved on the crankshaft 180 and located on the inner side of the cylinder 130, a slide sheet groove is further formed in the cylinder 130, the slide sheet is slidably mounted in the slide sheet groove through a spring, one end of the slide sheet extends into the compression cavity and abuts against the outer peripheral surface of the piston 181, and when the motor 182 drives the crankshaft 180 to rotate, the crankshaft 180 rotates to drive the piston 181 to suck, compress and discharge a refrigerant in the compression cavity of the cylinder 130.

In the embodiment of the present invention, the oil return device 160 includes an air suction pipe 161 and an oil suction pipe 165, the air suction pipe 161 communicates the liquid storage cavity 122 with the air suction port 131, specifically, the air suction pipe 161 can directly communicate with the air suction port 131, or indirectly communicate with the air suction port 131 through other pipelines. The suction pipe 161 may extend in a vertical direction or a horizontal direction, and is not particularly limited herein. The oil suction pipe 165 extends in the vertical direction, the upper end of the oil suction pipe 165 extends into the air suction pipe 161, and the lower end of the oil suction pipe 165 is located at the bottom of the liquid storage cavity 122. Here, the upper end of the oil suction pipe 165 may be extended into the air suction pipe 161 from a lower end opening of the air suction pipe 161, and the upper end of the oil suction pipe 165 may be extended into the air suction pipe 161 from a through hole formed in a pipe wall of the air suction pipe 161.

The housing 110 is provided with an air inlet 123 communicated with the liquid storage cavity 122, and the air inlet 123 is connected with an evaporator or an economizer of a refrigeration system through an air inlet pipe, so that a refrigerant mixture (a mixture of gaseous refrigerant and oil) in the refrigeration system can enter the liquid storage cavity 122 from the air inlet 123. After the refrigerant mixture enters the liquid storage cavity 122, the gaseous refrigerant is separated from the oil, the separated gaseous refrigerant is sucked into the suction pipe 161, the separated oil is collected at the bottom of the liquid storage cavity 122 under the action of gravity, the oil at the bottom of the liquid storage cavity 122 is sucked into the oil suction pipe 165 and flows into the suction pipe 161 through the oil suction pipe 165, then the oil flowing into the suction pipe 161 further flows to the suction port of the cylinder 130 under the driving of the gaseous refrigerant flowing at a high speed, and finally the oil enters the compression cavity of the cylinder 130 through the suction port 131, so that the oil can flow back into the compression cavity, the oil discharge amount is reduced, and the reliability of the rotary compressor 100 is improved. It should be noted that the gaseous refrigerant in the present invention should be understood in a broad sense, for example, the gaseous refrigerant may be a relatively pure gaseous refrigerant, and may also be a gaseous refrigerant containing a very small amount of oil; the utility model discloses well oil should also be done the generalized connection, for example can understand purer lubricating oil, also can connect for dissolving the lubricating oil that has few gaseous refrigerant.

The rotary compressor 100 of the present invention comprises a housing 110, a partition 120, a cylinder 130 and an oil return device 160, wherein the partition 120 is disposed in the housing 110 and divides the housing 110 into a compressor cavity 121 and a liquid storage cavity 122; the cylinder 130 is arranged in the compressor cavity 121, and an air suction port 131 is arranged on the cylinder 130; the oil return device 160 comprises an air suction pipe 161 and an oil suction pipe 165, the air suction pipe 161 is communicated with the liquid storage cavity 122 and the air suction port 131, the upper end of the oil suction pipe 165 extends into the air suction pipe 161, and the lower end of the oil suction pipe 165 is located at the bottom of the liquid storage cavity 122; thus, after a refrigerant mixture (a mixture of gaseous refrigerant and oil) in the refrigeration system enters the liquid storage cavity 122, the gaseous refrigerant is sucked into the air suction pipe 161, the oil flows to the bottom of the liquid storage cavity 122 under the action of gravity, the oil flowing to the bottom of the liquid storage cavity 122 is sucked into the oil suction pipe 165 and flows into the air suction pipe 161 through the oil suction pipe 165, then the oil enters the air suction port 131 of the cylinder 130 under the driving of high-speed airflow of the gaseous refrigerant, and finally the oil enters the compression cavity of the cylinder 130 through the air suction port 131, so that the oil return rate is effectively improved, the oil discharge amount is reduced, and the reliability of the rotary compressor 100 is further improved.

Referring to fig. 2 and 3, in an embodiment, the auxiliary bearing 150 is provided with a mounting through hole 151 communicating with the suction port 131; the air suction pipe 161 extends in the vertical direction, the air suction pipe 161 is installed in the installation through hole 151, and the lower end of the air suction pipe 161 penetrates the partition member 120 and communicates with the liquid storage chamber 122.

Specifically, the air suction pipe 161 is hermetically connected to the sub-bearing 150, so that the sealing effect of the reservoir 122 can be improved. The partition 120 is provided with a through hole corresponding to the mounting through hole 151, and the lower end of the suction pipe 161 passes through the through hole and extends into the liquid storage chamber 122, so that the gaseous refrigerant in the liquid storage chamber 122 can be better sucked into the suction pipe 161. The air suction pipe 161 may be formed in a tapered tubular shape or a straight tubular shape, and is not particularly limited. Optionally, referring to fig. 3, the air suction pipe 161 includes a first pipe section 162, a second pipe section 163, and a connecting pipe section 164 connecting the first pipe section 162 and the second pipe section 163, wherein the connecting pipe section 164 is gradually enlarged from top to bottom.

In view of the fact that the oil sump 190 is located at the bottom of the compressor cavity 121, in order to prevent the refrigerant in the suction pipe 161 from being heated by the oil in the oil sump 190, in an embodiment, the oil return device 160 further includes a heat insulation pipe 168, the heat insulation pipe 168 is sleeved outside the suction pipe 161, and a heat insulation gap 169 is formed between the heat insulation pipe 168 and the suction pipe 161. Thus, by providing the heat insulation gap 169, the air suction pipe 161 is well insulated by the air medium, and the refrigerant in the air suction pipe 161 is effectively prevented from being heated by the oil in the oil pool 190.

In this embodiment, a groove 152 is formed on a lower surface of the sub-bearing 150, the groove 152 is located on the periphery of the installation through hole 151, an upper end of the heat insulation pipe 168 is embedded in the groove 152, and a lower end of the heat insulation pipe 168 is hermetically connected to the air suction pipe 161. Specifically, the diameter of the second pipe segment 163 is larger than that of the first pipe segment 162, and the lower end of the insulation pipe 168 is welded to the second pipe segment 163. This prevents the gaseous refrigerant in the reservoir 122 from entering the heat insulating gap 169 through the gap between the heat insulating pipe 168 and the suction pipe 161, and ensures the heat insulating effect of the heat insulating gap 169.

Further, referring to fig. 2 and 3, in some embodiments, considering that the pressure inside the compressor cavity 121 is high pressure and the pressure inside the reservoir cavity 122 is low pressure, in order to block heat transfer between the high pressure and low pressure cavities, a heat insulation member may be disposed inside the reservoir cavity 122 to block heat transfer between the compressor cavity 121 and the reservoir cavity 122. The heat insulating material may be of various types, and for example, the heat insulating material may be a heat insulating cover 170 provided in the reservoir chamber 122, or may be a heat insulating layer provided on an inner wall surface of the reservoir chamber 122, which is not particularly limited herein.

The heat shield 170 may be integrally formed, and certainly, for convenience of installation, the heat shield 170 may also be separately formed, for example, the heat shield 170 includes a first cover body 171 and a second cover body 172, and the first cover body 171 is detachably connected to the second cover body 172. The first cover 171 and the second cover 172 may be disposed opposite to each other in the vertical direction, or may be disposed opposite to each other in the horizontal direction, which is not particularly limited. The heat shield 170 may be connected to the housing 110 by screw fastening or adhesive fastening. The upper end of the heat shield 170 is provided with a first through hole for the air suction pipe 161 to pass through, and the lower end of the heat shield 170 is provided with a second through hole for the oil suction pipe 165 to pass through. The heat shield 170 is further provided with a communication port communicated with the air inlet 123, so that the refrigerant entering the liquid storage cavity 122 from the air inlet 123 can further flow into the heat shield 170.

Referring to fig. 3, in this embodiment, the lower end of the oil suction pipe 165 abuts against the bottom of the liquid storage cavity 122, in order to suck the oil cup at the bottom of the heat shield 170 into the oil suction pipe 165, the lower end of the oil suction pipe 165 is provided with a first oil suction hole 165, and the first oil suction hole 165 is located in the heat shield 170 and is disposed corresponding to the bottom of the heat shield 170 to suck the oil at the bottom of the heat shield 170. In order to suck the oil at the bottom of the reservoir chamber 122 into the oil suction pipe 165, a second oil suction hole 167 is formed at the lower end of the oil suction pipe 165, and the second oil suction hole 167 is located below the heat shield 170 and is used for sucking the oil at the bottom of the reservoir chamber 122. The number of the first oil suction hole 165 and the second oil suction hole 167 may be one, two, or more, and is not particularly limited.

It is understood that in other embodiments, the lower end of the oil suction pipe 165 may not abut against the bottom of the reservoir 122, that is, a gap is left between the lower end of the oil suction pipe 165 and the bottom of the reservoir 122, so that the oil at the bottom of the reservoir 122 can enter the oil suction pipe 165 through the lower end opening of the oil suction pipe 165.

Referring to fig. 5 and 6, in another embodiment, an air outlet 124 is disposed on the housing 110 corresponding to the liquid storage cavity 122, the air suction pipe 161 extends along a horizontal direction and is installed at the air outlet 124, one end of the air suction pipe 161 is communicated with the liquid storage cavity 122, and the other end of the air suction pipe 161 is communicated with the air inlet 131 through a connecting pipe 125. In this embodiment, the air suction pipe 161 extends at least partially into the reservoir 122, and the connection pipe 125 is located outside the housing 110. Thus, the oil in the oil sump 190 can be prevented from heating the refrigerant in the suction pipe 161 by the external connection pipe 125. In this embodiment, a mounting opening is formed on a side of the heat shield 170 adjacent to the air outlet 124, and the air suction pipe 161 is communicated with the liquid storage cavity 122 through the mounting opening.

Referring to fig. 4, in an embodiment, a flow guide member 126 is disposed at the air inlet 123, and the flow guide member 126 is used for guiding the intake air flow to the inner wall surface of the liquid storage cavity 122, so that the intake air flow tangentially flows along the inner wall surface of the liquid storage cavity 122 (as indicated by an arrow in fig. 4), and the gaseous refrigerant and the oil can be better separated, thereby improving the oil separation efficiency. Specifically, the flow guide member 126 has an arc-shaped structure bent toward the inner wall surface of the reservoir chamber 122. Considering that a heat shield 170 is disposed in the liquid storage chamber 122, the flow guiding member 126 may further extend into the heat shield 170 to guide the intake airflow to an inner wall surface of the heat shield 170.

In addition, in the embodiment of the present invention, the rotary compressor 100 includes a filtering component, the filtering component is disposed in the liquid storage cavity 122 for filtering the refrigerant mixture entering the liquid storage cavity 122. The rotary compressor 100 includes a gas-liquid separation assembly disposed in the liquid storage cavity 122 for performing gas-liquid separation on a refrigerant mixture entering the liquid storage cavity 122.

Referring to fig. 1, in an embodiment, a ratio of the height H of the reservoir 122 to the height H of the housing 110 is greater than or equal to 0.05 and less than or equal to 0.3. Therefore, on one hand, the oil at the bottom of the liquid storage cavity 122 can be ensured to smoothly flow back into the compression cavity, the oil return rate is improved, the oil output is reduced, and the reliability of the rotary compressor 100 is improved; on the other hand, the overall size of the rotary compressor 100 can be kept small, and the rotary compressor 100 can be miniaturized.

The utility model discloses still provide a refrigeration plant, this refrigeration plant includes rotary compressor 100, and above-mentioned embodiment is referred to this rotary compressor 100's concrete structure, because refrigeration plant has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here. Wherein, the refrigeration equipment can be an air conditioner, a refrigerator, a heat pump water heater and the like.

The above is only the optional embodiment of the present invention, and not therefore the limit of the patent scope of the present invention, all of which are in the concept of the present invention, the equivalent structure transformation of the content of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. A rotary compressor, comprising:

a housing;

2. The rotary compressor of claim 1, further comprising an auxiliary bearing disposed in the compressor chamber and below the cylinder, the auxiliary bearing having a mounting through hole communicating with the suction port;

3. The rotary compressor of claim 2, wherein the suction pipe comprises a first pipe section, a second pipe section, and a connecting pipe section connecting the first pipe section and the second pipe section, wherein the connecting pipe section is gradually enlarged from top to bottom.

4. The rotary compressor of claim 2, wherein the oil return device further comprises a heat insulation pipe sleeved outside the suction pipe, and a heat insulation gap is formed between the heat insulation pipe and the suction pipe.

5. The rotary compressor of claim 4, wherein a groove is formed on a lower surface of the sub-bearing, the groove is formed on a periphery of the mounting through hole, an upper end of the heat insulating pipe is inserted into the groove, and a lower end of the heat insulating pipe is hermetically connected to the suction pipe.

6. The rotary compressor of claim 2, wherein a heat shield is disposed in the liquid storage chamber, a first through hole for the suction pipe to pass through is formed at an upper end of the heat shield, and a second through hole for the suction pipe to pass through is formed at a lower end of the heat shield.

7. The rotary compressor of claim 6, wherein a lower end of the oil suction pipe is provided with a first oil suction hole in the heat shield and disposed corresponding to a bottom of the heat shield for sucking oil from the bottom of the heat shield.

8. The rotary compressor of claim 7, wherein the lower end of the oil suction pipe is provided with a second oil suction hole located below the heat shield for sucking the oil at the bottom of the reservoir chamber.

9. The rotary compressor of claim 1, wherein a discharge port is formed in the housing corresponding to the reservoir chamber, the suction pipe extends in a horizontal direction and is installed at the discharge port, and one end of the suction pipe communicates with the reservoir chamber and the other end communicates with the suction port through a connection pipe.

10. The rotary compressor of claim 9, wherein a heat shield is disposed in the reservoir chamber, a mounting opening is disposed on a side of the heat shield adjacent to the exhaust opening, and the suction pipe is communicated with the reservoir chamber (122) through the mounting opening.

11. The rotary compressor of any one of claims 1 to 10, wherein a heat insulating layer is provided on an inner wall surface of the liquid storage chamber.

12. The rotary compressor of any one of claims 1 to 10, wherein the housing is provided with an air inlet communicated with the reservoir chamber, the air inlet being provided with a flow guide member for guiding an intake air flow to an inner wall surface of the reservoir chamber.

13. The rotary compressor of any one of claims 1 to 10, wherein the reservoir chamber is located below the compressor chamber, and a ratio of a height of the reservoir chamber to a height of the housing is greater than or equal to 0.05 and less than or equal to 0.3.

14. The rotary compressor of any one of claims 1 to 10, wherein the rotary compressor comprises a filter assembly disposed in the liquid storage chamber;

15. The rotary compressor of any one of claims 2 to 8, wherein the rotary compressor comprises a main bearing disposed in the compressor cavity above the cylinder, the main bearing, the secondary bearing and the cylinder together defining a compression cavity, and the suction port is in communication with the compression cavity.

16. A refrigerating apparatus comprising the rotary compressor of any one of claims 1 to 15.