WO2023015971A1

WO2023015971A1 - Oil separation device, condenser, and air conditioning system

Info

Publication number: WO2023015971A1
Application number: PCT/CN2022/090950
Authority: WO
Inventors: 梁瀚荣; 赵宇航; 杨锦源; 王小勇
Original assignee: 珠海格力电器股份有限公司
Priority date: 2021-08-09
Filing date: 2022-05-05
Publication date: 2023-02-16
Also published as: CN113503663A

Abstract

Disclosed in the present disclosure are an oil separation device, a condenser, and an air conditioning system. The oil separation device comprises a housing, a cylindrical first filtering member, and second filtering members arranged on two ends of the first filtering member. A first filtering cavity is provided between the first filtering member and the housing. A second filtering cavity is formed inside the first filtering member. A first block plate is arranged in the first filtering cavity. A second block plate is arranged in the second filtering cavity. The first block plate and the second block plate are arranged at intervals in the airflow direction of the housing. Compared with the prior art of the inventor, a gas refrigerant sequentially flows through a path of the first filtering member and the second filtering member, and the refrigerant is baffled for a plurality of times. Each time the refrigerant flows through the first filtering member to filter oil drops. After layer-by-layer filtering, the pure gaseous refrigerant flows out of a gas outlet, so that the space in the length direction of the housing is utilized to the maximum degree, the maximum utilization of a first filtering net is realized, and the oil separation efficiency is improved.

Description

Oil separator, condenser and air conditioning system

Cross References to Related Applications

This disclosure is based on the application with the Chinese application number 202110910176.0 and the filing date is August 9, 2021, and claims its priority. The disclosure content of the Chinese application is hereby incorporated into this disclosure as a whole.

technical field

The present disclosure relates to the technical field of air conditioning, in particular to an oil separation device, a condenser and an air conditioning system.

Background technique

In commercial air-conditioning units, after the refrigerant passes through the compressor, the refrigerant oil and the refrigerant will inevitably mix together. If the refrigerant oil is not taken out and returned to the compressor in time, the compressor will be insufficiently lubricated and the wear and power consumption of the compressor will be increased. increase, and even cause the compressor to burn tiles or even be scrapped. Therefore, an oil separation device is generally installed before the inlet of the condenser. At present, the oil separation device in the industry mainly includes an external oil separator and a built-in oil separator. The external oil separator needs Connected to the condenser through the connecting pipe, the addition of the pipeline will increase the pressure loss and reduce the energy efficiency; and the built-in oil separator in the known technology of the inventor is generally at the inlet and outlet of the oil separator The oil filter device is installed to filter the gas, which cannot make full use of the axial space of the oil separator. The filter device only filters at the air inlet and outlet, and the space utilization rate of the oil separator is low. It is difficult for the device to fully exert its filtering effect, which in turn makes the separation effect of the oil separator poor.

Contents of the invention

The disclosure provides an oil separation device, a condenser and an air conditioning system, which solves the problems known to the inventor that the internal space utilization rate of the oil separator is low, the filtering function of the filter device is not fully utilized, and the oil separation effect is poor.

The technical solution adopted in the present disclosure is: an oil separation device, including a casing, the casing is provided with an air inlet and an air outlet, and also includes: a Hollow first filter element, there is a space between the first filter element and the housing to form a first filter cavity, inside the first filter element is a second filter cavity; at least one filter cavity is located in the first filter element A first baffle that separates the first filter chamber along the direction from the air inlet to the air outlet in the chamber; at least one is arranged in the second filter chamber to separate the second filter chamber from the air inlet to the air outlet The second baffle plate separated in the direction, the first baffle plate and the second baffle plate are arranged at intervals along the direction from the air inlet to the air outlet.

In some embodiments, the inside of the shell is provided with an air intake cavity communicating with the air inlet, and the air intake cavity is in communication with the first filter cavity or the second filter cavity; the inside of the shell is provided with a The air outlet chamber communicates with the air outlet, and the air outlet chamber communicates with the first filter chamber or the second filter chamber.

In some embodiments, the second filter chamber communicates with the inlet chamber, the second filter chamber communicates with the outlet chamber, and the second filter chamber communicates with the inlet chamber and/or the outlet chamber. The connecting end is provided with a second filter element.

In some embodiments, the second filter element includes a first orifice plate, a second orifice plate, and a second filter screen disposed between the first orifice plate and the second orifice plate.

In some embodiments, the air outlet cavity includes a plurality of air outlet holes communicating with the exterior of the housing.

In some embodiments, the air outlet holes are uniformly arranged on the cavity wall of the air outlet cavity.

In some embodiments, the air inlet is opposite to the second filter chamber and the air inlet is concentric with the second filter chamber.

In some embodiments, the first filter element includes at least one filter unit.

In some embodiments, the filter unit includes: a first cylinder, a second cylinder concentrically sleeved on the outside of the first cylinder, and sandwiched between the first cylinder and the second cylinder The first filter screen in between, the first cylinder and the second cylinder are provided with air holes.

In some embodiments, the first filter element is formed by splicing at least two filter units along the direction from the air inlet to the air outlet.

In some embodiments, every two filter units are respectively connected to two sides of one of the second baffles, and a through hole connecting the two filter units is opened on the second baffle.

In some embodiments, both the first cylinder and the second cylinder are formed by butt joints of two cylinders, and the first baffle is provided between each cylinder and the cylinder.

In some embodiments, the bottom of the housing is provided with at least one oil outlet pipe communicating with the second filter cavity.

A condenser, which includes the oil separation device, and the oil separation device is built in the top of the condenser.

In some embodiments, at least one support plate supporting the oil separation device is provided inside the condenser, and the heat exchange tubes inside the condenser pass through the support plate.

An air-conditioning system, which includes the above-mentioned oil separation device or the above-mentioned condenser.

Compared with the technology known by the inventor, the first baffles in the present disclosure are arranged at intervals along the axial direction of the housing, thereby dividing the first filter chamber into at least two independent small chambers in the axial direction, The second baffle plate is also arranged at intervals along its axial direction, thereby dividing the second filter chamber into at least two independent small chambers in its axial direction, thereby forming the gas refrigerant from the first filter chamber and The flow path of the second filter cavity baffles the refrigerant multiple times, and each time the refrigerant flows through the first filter element to filter the oil droplets. After layer-by-layer filtration, the pure gaseous refrigerant flows out from the air outlet. Maximize the use of the space in the length direction of the shell, realize the maximum utilization of the first filter net, and improve the oil separation efficiency.

At the same time, the present disclosure also has the advantages of simple structure, small occupied space, and convenient installation and replacement.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the accompanying drawings that need to be used in the embodiments or technical descriptions known to the inventor will be briefly introduced below. Obviously, the accompanying drawings in the following description are only For some embodiments of the present disclosure, for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Figure 1 is a schematic diagram of the installation structure of the oil separation device in the present disclosure;

Fig. 2 is a schematic diagram of the installation structure of the oil separation device in the condenser in the present disclosure;

3 is a schematic diagram of a cross-sectional structure of an oil separation device in the present disclosure;

Fig. 4 is a schematic structural diagram of an intercepted portion of an oil separation device in the present disclosure;

Fig. 5 is a schematic diagram of the structure of the filtration unit in the present disclosure.

Wherein, the main reference signs of the present disclosure are as follows:

1. Shell; 11. Air inlet; 12. Air outlet; 13. Cylinder; 14. First cover; 15. Intake pipe; 16. Partition; 19. Air outlet cavity; 2. First filter element; 21. First filter cavity; 22. Second filter cavity; 23. First baffle; 24. Second baffle; 25. Filter unit; 251. First cylinder 252, the second cylinder body; 253, the first filter screen; 26, the oil outlet pipe; 3, the condenser; 4, the support plate; 5, the second filter element; 51, the second filter screen.

Detailed ways

The principle and structure of the present disclosure will be described in detail below with reference to the drawings and embodiments.

This disclosure discloses an oil separation device. As shown in Figures 1 to 3, the oil separation device in this disclosure mainly consists of two parts, namely an outer shell 1 and an inner cylinder, and the outer shell 1 is cylindrical with a circular cross section. , the two ends of the shell 1 are closed, one end of the shell 1 is the air inlet 11, and the other end is the air outlet 12, the gas flows into the oil separation device from the air inlet 11, and flows out from the air outlet 12; the cross section of the inner cylinder The shape is also circular, its inner diameter is smaller than that of the shell 1 and it is located in the middle of the shell 1, with a certain distance between them. The side wall of the inner cylinder serves as the first filter element 2 capable of filtering gaseous refrigerant, and the side wall of the inner cylinder Including the first filter net 253 , of course, the side wall can also be an ordinary thin wall, and the thin wall has a filtering function by opening holes of a specific size on the thin wall.

As shown in Figure 4, the first filter element 2 communicates in the direction from the air inlet 11 to the air outlet 12 of the casing 1, and the space between the first filter element 2 and the casing 1 forms a first filter cavity 21, the second The inner space of a filter element 2 is the second filter cavity 22; and at least one first baffle plate 23 is arranged in the first filter cavity 21, and these first baffle plates 23 are arranged at intervals along the axial direction of the housing 1 , so that the first filter cavity 21 is divided into at least two independent small chambers in its axial direction, and at least one second baffle plate 24 is also arranged in the second filter cavity 22, and the second baffle plate 24 is also Spaced apart along its axial direction, thereby the second filter cavity 22 is divided into at least two independent small chambers in its axial direction, and the first baffle plate 23 and the second baffle plate 24 are along the axis of the housing 1 Staggered in the direction, so as to form a path for the gas refrigerant to flow from the first filter cavity 21 and the second filter cavity 22 in sequence, and perform multiple deflections on the refrigerant, each time the refrigerant will flow through the first filter element 2 to clean the oil After being filtered layer by layer, the pure gaseous refrigerant flows out from the gas outlet 12.

There are three oil outlet pipes in communication with the second filter chamber 22 at the bottom of the housing 1 , the oil droplets filtered on the first filter element 2 gather and drop into the second filter chamber 22 , and flow back into the compressor from the oil outlet pipes.

In some embodiments, an air inlet chamber 17 is provided at the air inlet 11 inside the housing 1, an air outlet chamber 19 is provided at the air outlet 12, and the oil separation device transports the oil-gas mixture into the air inlet chamber 17 through an external pipeline, The second filter chamber 22 inside the first filter element 2 communicates with the air inlet chamber 17, and the second filter chamber 22 also communicates with the air outlet chamber 19, and the second filter chamber 22 communicates with the air inlet chamber 17 and/or the air outlet chamber. A second filter element 5 is provided at the communication points of the chambers 19 to further improve the effect of filtering oil droplets.

In some embodiments, the gas passes through the first filter element and the second filter element for multiple baffles in the oil separation device, and the gas passes through a total of filter layers (including the first filter element and the second filter element) in the oil separation device ) should be controlled between 20mm-200mm, so that the filtering effect of the fluid in the oil separation device can be fully guaranteed, and the excessive pressure drop of the fluid due to the total thickness of the filter layer can be avoided. The gas flow has a suitable flow rate in the oil separation unit.

Of course, in other embodiments, the air outlet chamber 19 can only be communicated with the second filter chamber 22, and can only be communicated with the first filter chamber 21. When the air outlet chamber 19 communicates with the first filter chamber 21, the air outlet chamber 19 and The junction of the first filter chamber 21 also needs to be provided with a second filter element 5; similarly, the air inlet chamber 17 can only be communicated with the second filter chamber 22, or can only be communicated with the first filter chamber 21, and there is no Specifically, when the air inlet chamber 17 communicates with the first filter chamber 21 , the second filter element 5 may also be provided at the connection between the air inlet chamber 17 and the first filter chamber 21 .

Wherein, in one embodiment, the oil separation device is built in the condenser 3, and a plurality of evenly arranged air outlet holes 191 communicated with the outside of the housing 1 are opened on the wall of the air outlet chamber 19, so that the gas can be effectively dispersed The heat exchange efficiency is improved, and the gas does not directly flush the tube sheet or the shell of the condenser 3, thereby reducing wear and abnormal noise.

In some embodiments, the uniform setting of the air outlet holes can ensure uniform air outlet, and the total area of the air outlet holes on the air outlet cavity 19 is set as twice that of the air inlet 11, and the aperture of each air outlet hole is controlled between 16 to 20mm. time, so that the total area of the air outlet is larger than the area of the air intake, so as to ensure that the flow rate and flow rate of the gas after being filtered by the filter layer can also be maintained in the normal range.

In some embodiments, the air intake pipe plays the role of guiding gas into the built-in oil separator, and the position can be changed according to the air intake position of the compressor. The air port 11 is arranged on the center of the circle at the end of the housing 1 to supply air more smoothly.

As shown in conjunction with accompanying drawings 3 and 5, specifically, in actual production, the first filter element 2 of the present disclosure is formed by splicing at least one filter unit 25 along the airflow direction (axial direction); each filter unit 25 It consists of a first cylinder 251, a second cylinder 252 and a first filter 253. The specific composition form is: the first cylinder 251 is arranged on the innermost layer, and a plurality of air holes are opened on the first cylinder 251. Layers of stacked first filter screens 253 are laid on the outside of the first cylinder 251. The thickness of each first filter screen 253 is 5mm-30mm to ensure the pressure drop and further ensure the flow rate and flow rate of the fluid at an appropriate size. It will not affect the flow rate and flow velocity of the fluid due to the excessive thickness of the first filter screen. Compared with the filter screen of winding filament, this can greatly save the installation efficiency. After the first filter screen 253 is laid, the second The cylinder body 252 is sleeved on its outside, so that the first cylinder body 251 and the second cylinder body 252 can clamp and fix the first filter screen 253. At the same time, the second cylinder body 252 is also provided with air holes, and the first cylinder body 251 and the diameter of the air hole provided on the second cylinder 252 is 8mm-20mm, preferably 16mm, and the hole spacing is controlled between 10mm to 22mm, preferably 18mm, because the effect of the air hole here is only to provide The air flow passes through without filtering performance. This setting can ensure that the gas can pass through normally, and at the same time, the size and spacing of the openings will not affect the structural strength of the cylinder too much. The first cylinder 251 and the second cylinder 252 can play a role. Sufficient support and fixation functions, the three together form the above-mentioned first filter element 2 . Of course, in other embodiments, the first filter element 2 can also be set in the form of openings only on the cylinder body, that is, several uniformly arranged small holes are directly opened on the cylinder body, so as to filter oil droplets. role.

In some embodiments, the cross-sectional area of the first chamber formed between the first filter element 2 and the housing 1 is twice the area of the air inlet 11, so that the gas flow area in the first chamber is sufficient to avoid The pressure drop of the fluid after passing through the first filter element is greatly reduced, so as to ensure the stability of the pressure drop of the device and keep the flow rate and velocity of the gas normal.

Furthermore, in consideration of the convenience of transportation and installation, both the first cylinder 251 and the second cylinder 252 are arranged in the form of a multi-section split, that is, the first and second cylinders are fixed by welding the end faces of the multi-section small cylinders Together, this greatly facilitates the production and assembly efficiency of the oil separation device.

In this embodiment, the first cylindrical body 251 and the second cylindrical body 252 are welded and fixed by two sections of small cylindrical bodies. Since the present disclosure also needs to set a second baffle plate 24 in the second filter chamber 22, Therefore, in the embodiment, the second baffle 24 is directly welded between the two small cylinders, so that the second baffle 24 can not only play the role of fixed support, but also play the role of baffle, and the small cylinder The distance between the air holes on the body and the second baffle plate 24 should be greater than 5mm, so as to avoid insufficient welding distance, easy welding and melting, and difficulty in ensuring welding quality.

In some embodiments, the two filter units 25 can also be welded and fixed together by the above-mentioned first baffle plate 23, the first baffle plate 23 is a circular plate body, and its diameter is consistent with the inner diameter of the housing 1. Two filter units 25 are respectively welded on both sides of the first baffle plate 23 for fixing, and then the welded two filter units 25 are placed in the casing 1 and welded and fixed, and the first baffle plate 23 is welded and fixed on the sides of the filter unit 25 The inner side, and the first baffle 23 can play a role in supporting the filter unit 25, and at the same time, a through hole is set in the middle of the first baffle 23 to connect the two filter units 25, and the first baffle 23 extends out of the filter unit 25 The outer edge part is a solid body, which is opposite to the part where the through hole is set, that is, the solid body is not provided with any through hole structure, and the solid body is only a solid plate to deflect the fluid in the first chamber role.

Moreover, in this disclosure, second filter elements 5 are also provided at both ends of the first filter element 2, and the second filter elements 5 are covered at the end positions of the first filter element 2. In this embodiment, the second filter element 5 Filter member 5 is made of three parts, is respectively the first hole plate 52, the second hole plate 53 and the second filter screen 51 that is arranged between the first hole plate and the second hole plate, the first hole plate and the second hole plate The plates play the role of supporting and fixing the second filter screen 51 , and the second filter element 5 can be directly fixed by welding the orifice plates to the first cylinder body 251 and the second cylinder body 252 of the first filter element 2 .

In some embodiments, the housing 1 mainly consists of a cylinder 13 and a cover. The cylinder 13 can be formed by axial welding and fixing of several small cylinders 13, and the two ends of the finally installed cylinder are welded and sealed. When assembling, insert the welded filter unit 25 (the first filter element 2) into the cylinder 13, then the first cover 14 is welded and fixed on the closed end of the cylinder 13, the end face of the first cover 14 There is an air inlet 11 in the center, the air inlet 11 is externally connected to the air inlet pipe 15, and a partition 16 is arranged on the outside of the filter unit 25. The outer diameter of the partition 16 is consistent with the inner diameter of the cylinder 13. After installation, The area spaced between the partition plate 16 and the first cover 14 then forms the air intake cavity 17, and then the second cover 18 is welded and fixed on the other end of the cylinder 13, and the second cover 18 opposite to the filter unit 25 The outer side of one end is also provided with a circle of partitions 16, and the partitions 16 and the second cover 18 form an air outlet cavity 19, and a number of air outlets are evenly opened on the end surface and the peripheral surface of the second cover 18 to evenly vent the air. .

The disclosure further proposes a condenser 3, the condenser 3 is a horizontal condenser, which includes the above-mentioned oil separation device, the oil separation device is built in the condenser 3, specifically installed at the top of the condenser 3, because The shell of the condenser 3 is also cylindrical. When installing, the shell 1 of the oil separation device is placed on the upper end of the condenser 3. The lower part of the oil separation device is supported and fixed by three support plates 4. On the support plate 4 There is a circular through hole 41 for the heat exchange tube to pass through, and a circular groove is provided on the upper part of the support plate 4. The groove is adapted to the outline of the oil separator shell 1, and the support plate is directly supported during installation. The plates 4 are lined up, and the oil separation device is placed in the groove and then welded and fixed, which can reduce the difficulty of production and installation.

In some embodiments, the length of the oil separation device is c1, the length of the condenser 3 is c2, and the relationship between the length of the oil separation device and the condenser 3 is 0.2c2≤c1≤0.7c2; the diameter of the oil separation device remains in the condenser Between 1/4 and 2/5 of the 3, the layout of the condenser 3 set in this way is reasonable, which can not only meet the installation of the elbow, but also ensure that the size of the oil separation device is large enough, and the oil separation device can ensure the separation effect At the same time, it will not interfere with the performance of each component in the condenser, so that the comprehensive performance of heat exchange and filtration of the condenser can be optimized.

An air-conditioning system, which includes the oil separation device, can be built into the condenser or placed outside the condenser.

The above specific embodiments are only used to illustrate the concept of the present disclosure, and those skilled in the art can make various modifications and changes under the concept of the present disclosure, and these modifications and changes are all included within the protection scope of the present disclosure .

Claims

An oil separation device, comprising:

A casing (1), the casing (1) being provided with an air inlet (11) and an air outlet (12);

The hollow first filter element (2) is arranged in the housing (1) and extends from the air inlet (11) to the air outlet (12). The hollow first filter element (2) ) is spaced apart from the housing (1) to form a first filter cavity (21), and a second filter cavity (22) is formed in the first filter element (2);

At least one first baffle (23), arranged in the first filter chamber (21) to move the first filter chamber (21) along the direction from the air inlet (11) to the air outlet (12) separated;

At least one second baffle (24), arranged in the second filter chamber (22) to separate the second filter chamber (22) along the direction from the air inlet (11) to the air outlet (12) ,as well as

Wherein the first baffle (23) and the second baffle (24) are arranged at intervals in the direction from the air inlet (11) to the air outlet (12).
The oil separation device according to claim 1, wherein an air intake chamber (17) communicating with the air inlet (11) is provided inside the housing (1), and the air intake chamber (17) is connected to the The first filter chamber (21) or the second filter chamber (22) are in communication; the inside of the housing (1) is provided with an air outlet chamber (19) communicating with the air outlet (12), and the air outlet chamber (19) is connected to the air outlet chamber (19). The first filter cavity (21) or the second filter cavity (22) are in communication.
The oil separation device according to claim 2, wherein the second filter chamber (22) communicates with the air inlet chamber (17), and the second filter chamber (22) communicates with the air outlet chamber (19) A second filter element (5) is provided at the communication end between the second filter chamber (22) and the inlet chamber (17) and/or the outlet chamber (19).
The oil separation device according to claim 3, wherein the second filter element (5) comprises a first orifice plate (52), a second orifice plate (53) and is located between the first orifice plate (52) and A second filter screen (51) between the second orifice plates (53).
The oil separation device according to claim 2, wherein the air outlet cavity (19) comprises a plurality of air outlet holes (191) communicating with the outside of the casing (1).
The oil separation device according to claim 5, wherein the air outlet holes (191) are uniformly arranged on the side wall of the air outlet chamber (19).
The oil separation device according to claim 2, wherein the air inlet (11) is facing the second filter chamber (22), and the air inlet (11) is connected to the second filter chamber (22) )concentric.
The oil separation device according to any one of claims 1 to 7, wherein the first filter element (2) comprises at least one filter unit (25).
The oil separation device according to claim 8, wherein the filter unit (25) comprises: a first cylindrical body (251), a second cylindrical body ( 252) and the first filter screen (253) sandwiched between the first cylinder (251) and the second cylinder (252), the first cylinder (251) and the second cylinder (252 ) is provided with an air hole (254).
The oil separation device according to claim 8 or 9, wherein the first filter element (2) consists of at least two filter units (25) along the direction from the air inlet (11) to the air outlet (12) A connection is formed.
The oil separation device according to claim 10, wherein two adjacent filter units (25) are respectively connected to both sides of a second baffle (24), and the second baffle (24) A through hole (241) connecting the two filter units (25) is opened.
The oil separation device according to claim 9, wherein the first cylinder (251) and the second cylinder (252) are composed of two sections of cylinders connected, and the first cylinder (251) and the second The first baffles (23) are arranged between two adjacent cylinders in the cylinders (252).
The oil separation device according to claim 1, wherein at least one oil outlet pipe (26) communicating with the second filter cavity (22) is provided at the bottom of the casing (1).
A condenser, comprising the oil separation device according to any one of claims 1 to 13, the oil separation device is built in the top of the condenser (3).
The condenser according to claim 14, wherein at least one support plate (4) supporting the oil separation device is further provided inside the condenser (3), and the support plate (4) is provided with a circular through hole (41) so that the heat exchange tube inside the condenser (3) passes through.
An air conditioning system, comprising the oil separation device according to any one of claims 1 to 13 or the condenser according to any one of claims 14 to 15.