WO2018133286A1

WO2018133286A1 - Liquid receiver and two-cylinder compressor having liquid receiver

Info

Publication number: WO2018133286A1
Application number: PCT/CN2017/086705
Authority: WO
Inventors: 李盖敏; 郑立宇
Original assignee: 广东美芝制冷设备有限公司
Priority date: 2017-01-18
Filing date: 2017-05-31
Publication date: 2018-07-26
Also published as: CN206409386U

Abstract

A liquid receiver (100) and a two-cylinder compressor having the liquid receiver, the liquid receiver (100) comprising: a casing (10); a sleeve (20) located inside the casing (1) and at least partially separated from the inner wall of the casing (1), the bottom (21) thereof being closed and the top thereof being open; a first suction tube (30) extending into the sleeve (20) from the bottom (12) of the casing (10); a second suction tube (40) extending into the sleeve (20) from the bottom (12) of the casing (10); an intake tube (50) extending into the casing (10) from the top (13) of the casing (10). The top (31) of the first suction tube (30) is higher than the top (41) of the second suction tube (40). The top (221) of the side (22) of the sleeve (20) is above the top (31) of the first suction tube (30), or aligned with the top (31) thereof. The structure increases the liquid storage capacity of the liquid receiver and allows the suction tubes to draw air uniformly and sufficiently, and as a result, a compressor with the liquid receiver has a higher maximum volumetric efficiency.

Description

Reservoir and double cylinder compressor with same

Technical field

The present invention relates to the field of compressor technology, and in particular to a liquid reservoir and a two-cylinder compressor having the same.

Background technique

In the related art, with respect to the rotary compressor, as the compressor speed increases, the compressor volumetric efficiency first increases and then decreases sharply, and there is a rotational speed point at which the maximum volumetric efficiency is turned, that is, the volumetric efficiency attenuates the rotational speed point. For the two-cylinder rotary compressor accumulator, the upper cylinder suction pipe and the lower cylinder suction pipe are affected by each other when inhaling respectively, and the shorter the length of the gas passage of the connection between the two pipes from the cylinder, the maximum volumetric efficiency The higher the speed point, on the contrary, the smaller the maximum volumetric efficiency speed point.

For the conventional two-cylinder rotary compressor accumulator, the upper cylinder suction pipe and the lower cylinder suction pipe are connected through the inner space of the cup body, and the shorter the gas passage length from the cylinder at the communication point between the two suction pipes is not increased. In the case of the inner diameter of the cup, the smaller the reservoir capacity of the reservoir. Therefore, when the maximum design rotational speed of the compressor is increased, there arises a problem that the volumetric efficiency and the liquid storage capacity of the accumulator cannot be balanced.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, the present invention proposes a reservoir which, in the case of a small influence on the liquid storage capacity, ensures that the compressor has a high maximum volumetric efficiency at high rotational speeds.

The present invention also proposes a two-cylinder compressor having the accumulator.

An accumulator according to an embodiment of the first aspect of the present invention includes: a housing; a sleeve located within the housing and at least partially spaced from an inner wall of the housing, the bottom of the sleeve being closed and And the top end is open; the first suction pipe, the first suction pipe extends into the sleeve from the bottom of the casing; the second suction pipe, the second suction pipe from the casing a bottom portion extending into the sleeve; and an intake pipe extending into the housing from a top of the housing; wherein a top end of the first suction pipe is higher than the second suction At the top end of the trachea, the tip end of the side of the sleeve is located above the top end of the first suction duct or flush with the top end of the first suction duct.

The accumulator according to the embodiment of the present invention increases the inhalation amount of the twin-cylinder compressor at a high rotation speed while ensuring its own liquid storage capacity, and improves the maximum volumetric efficiency and performance of the twin-cylinder compressor.

In some embodiments, the first suction duct and the second suction duct each include a straight pipe section and a bent pipe that are connected to each other The straight pipe section is at least partially located in the casing and the elbow sections are all located outside the casing, wherein the straight pipe section of the first suction pipe has a length M1, and the second suction pipe The length of the straight pipe section is M2, │M1-M2│≥10mm.

In some embodiments, the total length of the first suction duct is L1, and the total length of the second suction duct is L2, wherein │L1-L2│≤10 mm.

In some embodiments, the bottom of the sleeve has a first mounting hole into which the first suction pipe extends and a second mounting hole into which the second suction pipe extends, the first suction The air tube has an interference fit with the first mounting hole, and the second suction tube has an interference fit with the second mounting hole.

In some embodiments, the sides of the sleeve are opposite and completely spaced apart from the peripheral wall of the housing, the bottom of the sleeve being opposite and completely spaced from the bottom wall of the housing.

In some embodiments, the cross-sectional shape of the side of the sleeve is any one of a rectangle, a square, a circle, an ellipse, and an oblong.

In some embodiments, the bottom shape of the sleeve is planar.

In some embodiments, the bottom shape of the sleeve is arcuate and the bottom of the sleeve extends progressively downward from the edge toward the center.

A two-cylinder compressor according to an embodiment of the second aspect of the present invention includes: a compressor body having a first cylinder assembly and a second cylinder assembly, the first cylinder assembly having a first intake port, The second cylinder assembly has a second suction port; and the accumulator, the first suction pipe of the accumulator is connected to the first suction port, and the second inhalation of the accumulator The tube is connected to the second suction port.

DRAWINGS

1 is a schematic view of an accumulator according to a first embodiment of the present invention.

2 is a partial schematic view of the accumulator according to a second embodiment of the present invention (the bottom of the sleeve is planar).

Figure 3 is a partial schematic view of the accumulator according to a third embodiment of the present invention (the bottom of the sleeve is arcuate).

Figure 4 is a schematic cross-sectional view taken along line A-A of Figure 2 (when the side of the sleeve is circular in cross section).

Fig. 5 is a schematic cross-sectional view taken along line A-A of Fig. 2 (when the side portion of the sleeve is rectangular in cross section).

Figure 6 is a schematic cross-sectional view taken along line A-A of Figure 2 (when the side of the sleeve is elliptical in cross section).

Figure 7 is a schematic cross-sectional view along line A-A of Figure 2 (when the side of the sleeve is oblong in cross section).

Figure 8 is a graph comparing the volumetric efficiency curve of a two-cylinder compressor with the volumetric efficiency curve of a conventional two-cylinder compressor in accordance with an embodiment of the second aspect of the present invention.

Reference mark:

The accumulator 100,

The housing 10, the inner wall 11 of the housing, the peripheral wall 111 of the housing, the bottom wall 112 of the housing, the bottom 12 of the housing, the top of the housing Department 13,

The sleeve 20, the bottom 21 of the sleeve, the first mounting hole 211, the second mounting hole 212, the side portion 22 of the sleeve, the top end 221 of the side,

a first intake pipe 30, a top end 31 of the first intake pipe,

a second intake pipe 40, a top end 41 of the second intake pipe,

The intake pipe 50, the filter assembly 60, the volumetric efficiency curve a of the two-cylinder compressor of the embodiment of the present invention, and the volumetric efficiency curve b of the existing two-cylinder compressor.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

The accumulator 100 according to an embodiment of the present invention will be described in detail below with reference to FIGS. 1 through 8.

As shown in FIG. 1, a reservoir 100 according to an embodiment of the present invention includes a housing 10, a sleeve 20, a first intake pipe 30, a second intake pipe 40, and an intake pipe 50.

The sleeve 20 is located within the housing 10 and at least partially spaced from the inner wall 11 of the housing 10, the bottom 21 of the sleeve 20 is closed and the top end is open, and the first suction tube 30 extends from the bottom 12 of the housing 10 into the sleeve 20. The second suction duct 40 extends from the bottom 12 of the housing 10 into the sleeve 20, and the intake duct 50 extends into the housing 10 from the top 13 of the housing 10. Wherein the top end of the first suction pipe is higher than the top end of the second suction pipe, and the top end of the side of the sleeve is located above the top end of the first suction pipe or with the first The top end of the suction tube is flush.

According to the accumulator 100 of the embodiment of the present invention, the sleeve 20 closed at the bottom end of the first suction pipe 30 and the second suction pipe 40 is provided in the casing 10, and the side of the sleeve 20 is provided The top end 221 of the portion 22 is not lower than the higher one of the first suction duct 30 and the second suction duct 40, so that more liquid can be stored between the inner wall 11 of the casing 10 and the outer wall of the sleeve 20, Under the premise of ensuring its own liquid storage capacity, the top end 41 of the first suction pipe 30 and the second suction pipe 40 can be lowered to shorten the distance between the two suction pipe connections from the cylinder gas passage when applied to the compressor. The length, in turn, increases the inspiratory capacity of the two-cylinder compressor at high rotational speeds, increasing the maximum volumetric efficiency and performance of the two-cylinder compressor. In addition, by staggering the first intake pipe 30 and the top end 41 of the second intake pipe 40, the intake of the first intake pipe 30 and the second intake pipe 40 can be effectively avoided, and the two suctions are further improved. The amount of inhalation of the tube.

In some embodiments, the first intake pipe 30 and the second intake pipe 40 each include a straight pipe section and an elbow section that are connected to each other, and the straight pipe section is at least partially located in the casing 10 and the elbow sections are all located outside the casing 10. . That is, for the first intake pipe 30 For the second suction pipe 40, only the straight pipe section is located in the casing 10, and the elbow section is located outside the casing 10. The straight pipe section may extend out of the casing 10 or may be connected only to the bottom wall of the casing 10. 112 on.

Advantageously, the length of the straight section of the first suction duct 30 is M1, and the length of the straight section of the second suction duct 40 is M2, │ M1 - M2 │ ≥ 10 mm. Thereby, the suction ends of the two intake pipes are appropriately spaced apart, so that the suction of the cylinders connected to the two intake pipes is more uniform and sufficient.

Further, the total length of the first intake pipe 30 is L1, and the total length of the second intake pipe 40 is L2, wherein │L1-L2│≤10 mm. In this way, while ensuring that each of the two suction pipes is uniformly and sufficiently inhaled, the difference in the intake amount of the two suction pipes is prevented from being excessively large.

Referring to FIG. 1, the bottom portion 21 of the sleeve 20 has a first mounting hole 211 into which the first suction pipe 30 extends and a second mounting hole 212 into which the second suction pipe 40 extends, the first suction pipe. 30 is in interference fit with the first mounting hole 211, and the second intake pipe 40 is interference fit with the second mounting hole 212.

Specifically, the first air intake pipe 30 sequentially passes through the bottom wall 112 of the casing 10, the first mounting hole 211 of the bottom portion 21 of the sleeve 20, and the first air suction pipe 30 is fixedly connected to the bottom wall 112 of the casing 10 to The first suction pipe 30 is fixed on the casing 10, and the first suction pipe 30 is interference-fitted with the first mounting hole 211 of the sleeve 20 to fix the sleeve 20 on the first suction pipe 30; Similarly, the second suction pipe 40 sequentially passes through the bottom wall 112 of the casing 10, the second mounting hole 212 of the bottom portion 21 of the sleeve 20, and the second suction pipe 40 is fixedly connected to the bottom wall 112 of the casing 10 to The fixing of the second suction pipe 40 on the casing 10 is achieved, and the second suction pipe 40 is interference-fitted with the second mounting hole 212 of the sleeve 20 to fix the sleeve 20 on the second suction pipe 40.

Thereby, not only the fixing of the first intake pipe 30, the second intake pipe 40, the sleeve 20, and the casing 10 but also the disassembly and replacement of the sleeve 20 is facilitated.

In some embodiments, the outer wall of the sleeve 20 may be in partial contact with the inner wall 11 of the housing 10 or may be completely spaced apart. In one embodiment, the side portions 22 of the sleeve 20 are opposite and completely spaced from the peripheral wall 111 of the housing 10, and the bottom portion 21 of the sleeve 20 is opposite and completely spaced from the bottom wall 112 of the housing 10. Thereby, the liquid storage space of the accumulator 100 is further increased.

The shape of the bottom 21 of the sleeve 20 is available in a variety of options. In the specific example shown in FIG. 2, the bottom portion 21 of the sleeve 20 is planar. In the specific example shown in FIG. 3, the bottom portion 21 of the sleeve 20 is arcuate in shape, and the bottom portion gradually extends downward from the edge toward the center.

In some embodiments, the side portion 22 of the sleeve 20 has a cross-sectional shape that is any of a rectangular shape, a square shape, a circular shape, an elliptical shape, and an oblong shape. Specifically, as shown in FIG. 4, the side portion 22 of the sleeve 20 has a circular cross section. As shown in Figure 5, the side portion 22 of the sleeve 20 has a rectangular cross section. As shown in Figure 6, the side portion 22 of the sleeve 20 has an elliptical cross section. As shown in Figure 7, the side portion 22 of the sleeve 20 is oblong in cross section. Thus, one skilled in the art can select the shape of the side portion 22 of the appropriate sleeve 20 as desired.

A two-cylinder compressor according to an embodiment of the second aspect of the present invention includes: a compressor body having a first gas a cylinder assembly and a second cylinder assembly, the first cylinder assembly having a first suction port, the second cylinder assembly having a second suction port; and the accumulator 100 of the above embodiment, the first suction pipe of the accumulator 100 30 is connected to the first suction port, and the second suction pipe 40 of the accumulator 100 is connected to the second suction port.

Fig. 8 is a graph showing the volumetric efficiency of a two-cylinder compressor according to an embodiment of the present invention as a function of motor rotation speed, and a graph showing the volumetric efficiency of a conventional two-cylinder compressor as a function of motor rotation speed. Referring to Fig. 8, the twin-cylinder compressor to which the above-described accumulator 100 is applied has a high maximum volumetric efficiency.

In addition, in the refrigeration system of the two-cylinder compressor application, the intake port of the accumulator 100 is connected to the outlet of the evaporator to perform gas-liquid separation of the low-pressure gas-based refrigerant discharged from the evaporator. And the low temperature and low pressure gas is sent to the first cylinder assembly through the first suction pipe 30 and the first suction port for compression, and the low temperature and low pressure gas is sent to the second suction pipe 40 and the second suction port to the second cylinder assembly. Compress.

Those skilled in the art will appreciate that components such as the filter assembly 60 in the reservoir 100 are well known to those skilled in the art and will not be described herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or below the second feature, or merely that the first feature is less than the second feature. feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A liquid storage device, comprising:

case;

a sleeve, the sleeve being located in the housing and at least partially spaced apart from an inner wall of the housing, the bottom of the sleeve being closed and the top end being open;

a first suction pipe, the first suction pipe extending into the sleeve from a bottom of the housing;

a second intake pipe, the second suction pipe extending into the sleeve from a bottom of the housing;

An intake pipe extending into the housing from a top of the housing;

Wherein the top end of the first suction pipe is higher than the top end of the second suction pipe, and the top end of the side of the sleeve is located above the top end of the first suction pipe or with the first The top end of the suction tube is flush.
The accumulator according to claim 1, wherein said first intake pipe and said second intake pipe each comprise a straight pipe section and an elbow section connected to each other, said straight pipe section being at least partially located The length of the straight pipe section of the first suction pipe is M1, and the length of the straight pipe section of the second suction pipe is M2, │M1 -M2│≥10mm.
The accumulator according to claim 2, wherein the total length of the first suction duct is L1, and the total length of the second suction duct is L2, wherein │L1-L2│≤10 mm .
The accumulator according to any one of claims 1 to 3, wherein a bottom of the sleeve has a first mounting hole into which the first suction pipe extends and a second suction a second mounting hole into which the air pipe extends, the first suction pipe being in an interference fit with the first mounting hole, and the second suction pipe being in an interference fit with the second mounting hole.
The accumulator according to any one of claims 1 to 4, wherein a side of the sleeve is opposite and completely spaced apart from a peripheral wall of the housing, a bottom of the sleeve and the bottom The bottom walls of the housing are relatively and completely spaced apart.
The accumulator according to any one of claims 1 to 5, wherein a cross-sectional shape of a side portion of the sleeve is any one of a rectangle, a square, a circle, an ellipse, and an oblong Kind.
The accumulator according to any one of claims 1 to 6, wherein the bottom shape of the sleeve is planar.
The accumulator according to any one of claims 1 to 6, wherein the bottom shape of the sleeve is arcuate, and the bottom of the sleeve gradually extends downward from the edge toward the center.
A two-cylinder compressor, comprising:

a compressor body having a first cylinder assembly having a first intake port and a second cylinder assembly having a second intake port;

The accumulator according to any one of claims 1 to 8, wherein a first suction duct of the accumulator is connected to the first suction port, and a second intake pipe of the accumulator is The second suction port is connected.