WO2024032016A1

WO2024032016A1 - Heat exchange device, refrigeration circuit and air conditioning device

Info

Publication number: WO2024032016A1
Application number: PCT/CN2023/088155
Authority: WO
Inventors: 卢杏斌; 胡海利; 岳清学; 王小勇
Original assignee: 珠海格力电器股份有限公司
Priority date: 2022-08-09
Filing date: 2023-04-13
Publication date: 2024-02-15
Also published as: CN115289721A

Abstract

A heat exchange device, a refrigeration circuit and an air conditioning device. The heat exchange device comprises a can-shaped falling film heat exchanger (1) and an oil return device (2). The can-shaped falling film heat exchanger (1) comprises a housing (11), an inner cylinder (12) and a heat exchange coil (13). A first end in the axial direction of the housing (11) is provided with a liquid inlet (1A) and a gas inlet and outlet port (1C). The heat exchange coil (13) comprises a falling film area heat exchange section and a flooded area heat exchange section. The oil return device (2) comprises a gas guide pipe (21), an oil return part (22) and a filling part (23). The air guide pipe (21) is communicated with the gas inlet and outlet port (1C) of the housing (11) and comprises a first gas guide pipe inlet and outlet port (21A) located in a gas phase area of the inner cylinder (12). The oil return part (22) comprises one or more oil return ports which are communicated with a hollow part of the gas guide pipe (21) between the first gas guide pipe inlet and outlet (21A) and the gas inlet and outlet port (1C). The filling part (23) is arranged in the space of a second end in the axial direction of the housing (11), and in the axial direction of the housing (11), the oil return port and the filling part (23) is arranged between an end of the flooded area heat exchange section close to the falling film heat exchange section and the inner wall surface of a second end of the housing (11).

Description

Heat exchange equipment, refrigeration circuits and air conditioning equipment

Cross-references to related applications

This disclosure is based on the Chinese patent application with application number 202210950142.9, the filing date is August 9, 2022, and the invention name is "Heat exchange equipment, refrigeration circuit and air conditioning equipment", and claims its priority. This Chinese patent application The disclosures of are hereby incorporated into this disclosure as a whole.

Technical field

The present disclosure relates to the technical fields of heat exchange and air conditioning, and in particular to a heat exchange equipment, a refrigeration circuit and an air conditioning equipment.

Background technique

As a new type of high-efficiency and energy-saving equipment, tank-type falling film heat exchangers are gradually replacing flooded evaporators in air conditioning equipment. The tank-type falling film heat exchanger has a small refrigerant charge, small hydrostatic pressure difference, high heat exchange efficiency, and convenient oil return. The tank-type falling film heat exchanger is equipped with a full liquid area, and a certain liquid level is maintained in the tank-type falling film heat exchanger when the unit is running.

In the related technology, an oil return device is installed in the tank-type falling film heat exchanger, and the U-shaped tube installed in the radial middle of the heat exchange coil of the tank-type falling film heat exchanger and the oil return hole at the bottom of the U-shaped tube are used. The lubricating oil that is miscible with the liquid refrigerant in the full liquid area is sucked away through the entrainment effect and returned to the compressor of the air conditioning equipment to achieve the purpose of oil return.

Since the U-shaped pipe extends into the center of the coil section in the liquid-filled area, the area in the center of the coil section in the liquid-filled area cannot be effectively utilized. A large amount of liquid refrigerant is stored at the bottom, which increases the refrigerant charging amount and increases the cost of air conditioning equipment. At the same time, due to the large accumulation of liquid refrigerant in the full liquid area, the content of lubricating oil that is miscible with it is diluted. Increased difficulty in oil return.

The above description is only for providing background technology information related to the present application and does not necessarily constitute prior art.

Contents of the invention

The purpose of this disclosure is to provide a heat exchange equipment, a refrigeration circuit and an air conditioning equipment, aiming to solve the problem of large refrigerant charging capacity of the heat exchange equipment including a tank-type falling film heat exchanger and an oil return device.

A first aspect of the present disclosure provides a heat exchange device, including:

A tank-type falling film heat exchanger includes a shell, an inner cylinder and a heat exchange coil. The axial first end of the shell has a liquid inlet and a gas inlet and outlet port. The heat exchange coil is located on the diameter of the shell. Disposed upward between the outer shell and the inner cylinder, the heat exchange coil includes a first end of the outer shell and an axial second end arranged between the outer shell and the inner cylinder. a falling film zone heat exchange section between the inner cylinders and a flooded zone heat exchange section arranged from the falling film zone heat exchange section to the second end of the shell; and

The oil return device includes an air guide pipe, an oil return part and a filling part. The air guide pipe is connected with the gas inlet and outlet port of the outer shell and includes a first air guide pipe inlet and outlet located in the gas phase area of the inner cylinder. The oil return pipe The part includes one or more oil return ports, the oil return ports are connected to the hollow part of the air guide tube between the first air guide tube inlet and outlet and the gas inlet and outlet, and the filling part is disposed on the in the space of the second end of the housing, and the oil return port and the filling part are located along the axial direction of the housing between one end of the liquid-filled area heat exchange section and close to the falling film area heat exchange section and the between the inner wall surfaces of the second end of the housing.

In the heat exchange equipment of some embodiments, the filling part includes a first filling body located in the radial middle of the liquid-filled area heat exchange section and/or located between the liquid-filled area heat exchange section and the shell. a second filling body between the inner wall surfaces of the second end.

In the heat exchange device of some embodiments,

Along the radial direction of the housing, at least a portion of the second filling body has a size larger than that of the first filling body and protrudes radially outward of the housing relative to the first filling body; and/or

Along the radial direction of the housing, the side surface of the second filling body is spaced apart from the inner wall surface of the housing, and the oil return port is located away from the second filling body along the axial direction of the housing. side of the second end.

In the heat exchange device of some embodiments, the first filling body and the second filling body are integrally provided.

In the heat exchange device of some embodiments,

The first filling body includes a first rotating body in the same axial direction as the housing; and/or

The second filling body includes a second rotating body in the same axial direction as the housing.

In the heat exchange device of some embodiments,

The first rotary body and the second rotary body are coaxially arranged; and/or

At least one of the first rotary body and the second rotary body is coaxially arranged with the housing.

In the heat exchange equipment of some embodiments, the falling film zone heat exchange section and the liquid filled zone heat exchange section of the heat exchange coil each include at least one coil section, and the falling film zone heat exchange section The total height of the multiple coil sections of the heat exchange section in the liquid-filled area is h. The filling part includes the first filling body. The height of the first filling body is h5, where the range of h5 is h. /4~h/2.

In the heat exchange equipment of some embodiments, the falling film zone heat exchange section and the liquid filled zone heat exchange section of the heat exchange coil each include at least one coil section, and the falling film zone heat exchange section and the The total height of the multiple coil sections of the liquid-filled area heat exchange section is h, the filling part includes the first filling body, and along the axial direction of the shell, the first air guide tube The distance between the inlet and the end of the first filling body away from the second end of the shell is h6, where h6>h/6.

In the heat exchange equipment of some embodiments, the filling part includes the second filling body, and the distance between the second filling body and the inner wall of the housing along the radial direction of the housing is h7, where h7 is The range is 5mm～40mm.

In the heat exchange device of some embodiments, the filling part includes the second filling body, the second end of the housing has a liquid outlet, and the liquid outlet is connected to a radially outer side of the second filling body. sides facing each other.

In the heat exchange device of some embodiments, the filling part includes an accommodating space, and the accommodating space is configured to communicate with a space at the second end of the housing outside the filling part to provide access to the accommodating space. Liquid is introduced into the space at the second end of the housing, and at least one of the oil return ports is located in the accommodation space.

In the heat exchange device of some embodiments, along the radial direction of the shell, the accommodation space is located in the middle of the filling part, and the filling part further includes a communication part, and the communication part communicates with the accommodation space and the space at the second end of the housing located outside the filling part to introduce liquid in the space at the second end of the housing into the accommodation space.

In the heat exchange device of some embodiments, the communication portion includes one or more through holes provided at the bottom of the accommodation space and extending in a radial direction of the housing.

In the heat exchange device of some embodiments,

The air conduit is located outside the filling part; or

A part of the air guide tube is located in the accommodation space.

In the heat exchange device of some embodiments,

The oil return part includes an oil return hole provided on the wall of the air guide pipe, and at least one of the oil return ports is the oil return hole; and/or

The oil return part includes an oil return hole provided on the wall of the air guide pipe and a liquid conduit connected to the oil return hole, and at least one of the oil return ports is located on the liquid conduit; and/ or

The oil return part includes an oil return hole provided on the wall of the air guide pipe and a filter element connected to the oil return hole, and at least one of the oil return ports is located on the filter element; and/or

The oil return part includes an oil return hole provided on the wall of the air guide pipe, a filter element communicated with the oil return hole, and a liquid conduit connecting the oil return hole and the filter element, at least one The oil return port is located on the filter element.

In some embodiments of the heat exchange device, the liquid conduit is a capillary tube.

In the heat exchange equipment of some embodiments, the oil return portion includes a plurality of oil return ports, and at least two of the plurality of oil return ports have different heights.

In the heat exchange equipment of some embodiments, the air guide tube is a U-shaped tube.

In the heat exchange equipment of some embodiments, the U-shaped pipe is bent from a single pipe or the U-shaped pipe is welded from multiple straight pipe sections.

In the heat exchange equipment of some embodiments, the air guide tube has a balance hole provided on the tube wall, along the axial direction of the housing, the balance hole is located at the inlet and outlet of the first air guide tube and the gas inlet and outlet. between.

In the heat exchange device of some embodiments,

The air guide tube is located radially inside the inner cylinder; or

A part of the air guide tube is located radially inside the inner cylinder, and the other part is located radially outside the inner cylinder.

In the heat exchange equipment of some embodiments, the tank-type falling film heat exchanger further includes a gas-liquid separation device, and the gas-liquid separation device is configured to separate the gas-liquid separation device that enters the gas-conducting pipe through the inlet and outlet of the first gas-conducting pipe. droplets within the gas.

In the heat exchange equipment of some embodiments, the gas-liquid separation device is disposed at the second end of the inner cylinder to separate liquid droplets in the gas entering the inner cylinder, and the first air guide inlet and outlet is located at the second end of the inner cylinder. between the gas-liquid separation device and the first end of the inner cylinder.

A second aspect of the disclosure provides a refrigeration circuit, including the heat exchange device of the first aspect of the disclosure.

A third aspect of the disclosure provides an air conditioning device, including the heat exchange device of the first aspect of the disclosure.

Based on the heat exchange equipment provided by the present disclosure, since the filling part is arranged in the space of the second end of the shell along the axial direction of the shell and is located between one end of the heat exchange section in the liquid-filled area and close to the heat exchange section in the falling film area and the second end of the shell There is a filling part between the inner wall surfaces, that is, in the liquid-filled area, which can partially occupy the space of the liquid-filled area and replace the volume that the liquid refrigerant in the liquid-filled area needs to be filled, which is beneficial to reducing the refrigerant filling amount, thereby reducing the cost of air conditioning equipment. . At the same time, since the total amount of liquid refrigerant in the full liquid area is reduced, the content of lubricating oil that is mutually soluble with the liquid refrigerant is relatively increased, so the lubrication content in the liquid sucked by the oil return port increases, which is beneficial to improving the oil return effect.

Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings.

Description of drawings

The drawings described here are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the attached picture:

Figure 1 is a schematic three-dimensional cross-sectional structural diagram of an embodiment of the present disclosure.

Figures 2 and 3 are schematic cross-sectional structural views of the embodiment shown in Figure 1.

Figure 4 is a schematic three-dimensional cross-sectional structural diagram of an embodiment of the present disclosure.

FIG. 5 is a schematic cross-sectional structural view of the embodiment shown in FIG. 4 .

Figure 6 is a schematic three-dimensional cross-sectional structural diagram of an embodiment of the present disclosure.

FIG. 7 is a schematic cross-sectional structural view of the embodiment shown in FIG. 6 .

Figure 8 is a schematic cross-sectional structural diagram of an embodiment of the present disclosure.

Figure 9 is a schematic structural diagram of a U-shaped tube in some alternative embodiments of the present disclosure.

Detailed ways

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of this disclosure.

The relative arrangement of components and steps, numerical expressions, and numerical values set forth in these examples do not limit the scope of the disclosure unless otherwise specifically stated. At the same time, it should be understood that, for convenience of description, the dimensions of various parts shown in the drawings are not drawn according to actual proportional relationships. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the authorized specification. In all examples shown and discussed herein, any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters refer to similar items in the following figures, so that once an item is defined in one figure, it does not need further discussion in subsequent figures.

In the description of the present disclosure, it should be understood that the use of words such as "first" and "second" to define components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above words have no special meaning. meaning and therefore cannot be construed as limiting the scope of the present disclosure.

In the description of the present disclosure, it should be understood that the orientation indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom", etc. Or positional relationships are generally based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present disclosure and simplifying the description. Without explanation to the contrary, these directional words do not indicate and imply the referred devices or elements. must have a specific orientation or be in a specific The orientation construction and operation should not be construed as limiting the scope of the present disclosure; the orientation words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

As shown in FIGS. 1 to 9 , embodiments of the present disclosure provide a heat exchange device. The heat exchange equipment includes a tank-type falling film heat exchanger 1 and an oil return device 2.

The tank type falling film heat exchanger 1 includes an outer shell 11 , an inner cylinder 12 and a heat exchange coil 13 . The first end of the housing 11 has a liquid inlet 1A and a gas inlet and outlet port 1C. The heat exchange coil 13 is arranged between the outer shell 11 and the inner cylinder 12 in the radial direction of the outer shell 11 . The heat exchange coil 13 includes a falling film zone heat exchange section arranged between the shell 11 and the inner cylinder 12 from the first end to the second end of the shell 11 and a falling film zone heat exchange section arranged from the second end of the shell 11 to the second end of the shell 11 . The heat exchange section of the liquid-filled area.

The oil return device 2 includes an air guide pipe 21 , an oil return part 22 and a filling part 23 . The air guide tube 21 is connected with the gas inlet and outlet port 1C of the housing 11 and includes a first air guide tube inlet and outlet 21A located in the gas phase area of the inner cylinder 12 . The oil return part 22 includes one or more oil return ports. The oil return port is connected to the hollow part of the air guide pipe 21 between the first air guide pipe inlet and outlet 21A and the gas inlet and outlet port 1C. The filling part 23 is provided on the third part of the housing 11 In the space between the two ends, the oil return port and the filling part 23 are located along the axial direction of the shell 11 between one end of the liquid-filled area heat exchange section close to the falling film area heat exchange section and the inner wall surface of the second end of the shell 11 .

Since the filling part 23 is arranged in the space of the second end of the housing 11 along the axial direction of the housing 11 and is located between one end of the liquid-filled area heat exchange section close to the falling film area heat exchange section and the inner wall surface of the second end of the housing 11, That is, a filling portion 23 is provided in the liquid-filled area, which can partially occupy the space of the liquid-filled area and replace the volume that needs to be filled with liquid refrigerant in the liquid-filled area, which is conducive to reducing the refrigerant filling amount, thereby reducing the cost of the air conditioning equipment. At the same time, since the total amount of liquid refrigerant in the full liquid area is reduced, the content of lubricating oil that is mutually soluble with the liquid refrigerant is relatively increased, so the lubrication content in the liquid sucked by the oil return port increases, which is beneficial to improving the oil return effect.

After the tank type falling film heat exchanger 1 is installed, the axial direction of the shell 11 is in the vertical direction, the first axial end of the shell 11 is located above the second axial end, and the gas phase area is located above the liquid-filled area. As shown in Figures 1 to 8, the first air guide pipe inlet and outlet 21A is located inside the inner cylinder 12 and between the gas inlet and outlet port 1C and the liquid-filled area heat exchange section along the axial direction of the shell 11, so that the first air guide pipe enters The outlet 21A is located in the gas phase area of the inner cylinder 12 .

As shown in Figures 1 to 8, in some embodiments of the heat exchange equipment, the filling part 23 includes a first filling body 231 located in the radial middle of the liquid-filled area heat exchange section and/or located in the liquid-filled area heat exchange section. and the second filling body 232 between the inner wall surface of the second end of the housing 11 .

A first filling body 231 is provided in the radial middle of the heat exchange section in the liquid-filled area or a second filling body 232 is provided between the heat exchange section in the liquid-filled area and the inner wall surface of the second end of the shell 11, so that the filling portion 23 can occupy The radial middle part of the liquid-filled area heat exchange section or the corresponding space between the liquid-filled area heat exchange section and the inner wall surface of the second end of the shell 11 makes the filling part 23 The corresponding part replaces the corresponding space, reducing the liquid refrigerant that should be filled into the corresponding space, which is beneficial to reducing the space that needs to be filled with liquid refrigerant in the full liquid area, which is beneficial to reducing the refrigerant filling amount and improving the oil return effect.

As shown in FIGS. 1 to 8 , in the heat exchange device of some embodiments, along the radial direction of the housing 11 , at least a portion of the second filling body 232 has a size larger than that of the first filling body 231 and is relatively larger than the first filling body 231 . The body 231 protrudes radially outward of the housing 11; and/or along the radial direction of the housing 11, the side surface of the second filling body 232 is spaced apart from the inner wall surface of the housing 11; and/or the oil return port is located along the axial direction of the housing 11. A side of the second filling body 232 away from the second end of the housing 11 .

Along the radial direction of the housing 11, the size of at least a part of the second filling body 232 is larger than the size of the first filling body 231 and protrudes radially outward of the housing 11 relative to the first filling body 231, which is beneficial to making the second filling body 232 smaller. Taking up more space in the liquid-filled area will help reduce the refrigerant filling amount and improve the oil return effect.

The side surface of the housing 11 of the second filling body 232 is spaced apart from the inner wall surface of the housing 11 along the radial direction of the housing 11 , which facilitates the liquid refrigerant to be located in the interval between the side surface of the second filling body 232 and the inner wall surface of the housing 11 . Because the liquid refrigerant is less disturbed, it contains less gas than other parts of the liquid-filled area. When discharging the liquid refrigerant, introducing the refrigerant from this interval can reduce the gas carried by the refrigerant.

The oil return port is located on the side of the second filling body 232 away from the second end of the housing 11 along the axial direction of the housing 11 , which is conducive to reducing the liquid refrigerant on the outside of the side of the second filling body 232 when the fluid enters and exits the air guide pipe 21 through the oil return port. the disturbance produced.

As shown in FIGS. 1 to 8 , in the heat exchange equipment of some embodiments, the first filling body 231 and the second filling body 232 are integrally provided.

Integrating the first filling body 231 and the second filling body 232 facilitates the manufacturing and molding of the filling part 23 , and also facilitates faster positioning and assembly of the filling part 23 and the housing 11 .

As shown in FIGS. 1 to 8 , in some embodiments of the heat exchange device, the first filling body 231 includes a first rotary body in the same axial direction as the housing 11 ; and/or the second filling body 232 includes a first rotating body with the same axial direction as the housing 11 . 11 a second rotary body with the same axial direction.

The first filling body 231 includes a first rotating body in the same axial direction as the housing 11 or the second filling body 232 includes a second rotating body in the same axial direction as the housing 11, which is beneficial to the first filling body 231 or the second filling body 231. The distance between the filling body 232 and the coil section of the heat exchange section in the liquid-filled area is more uniform, so that there is sufficient flow of refrigerant around the coil section of the heat-exchange section in the liquid-filled area to participate in the heat exchange between the heat exchange sections in the liquid-filled area. , reducing the impact of the filling part 23 on the heat exchange section in the liquid-filled area.

As shown in Figures 1 to 8, in the heat exchange equipment of some embodiments, the first rotary body and the second rotary body are coaxially arranged; and/or at least one of the first rotary body and the second rotary body is connected to the outer shell 11 Coaxial setup.

Setting the first rotary body coaxially with the second rotary body, or arranging at least one of the first rotary body and the second rotary body coaxially with the shell 11 is beneficial to the heat exchange section between the first rotary body and the full heat zone. An appropriate distance is maintained between the coil sections or between the second rotary body and the inner wall surface of the shell 11 along the radial direction of the shell 11, so that the first rotary body and the second rotary body are opposite to each other in the coil section of the heat exchange section in the full heat zone. The impact of heat exchange is reduced.

As shown in FIGS. 1 to 8 , in the heat exchange equipment of some embodiments, the falling film zone heat exchange section and the flooded liquid zone heat exchange section of the heat exchange coil 13 each include at least one coil section. As shown in Figure 3, the total height of the multiple coil sections of the falling film zone heat exchange section and the flooded zone heat exchange section is h. The filling part 23 includes a first filling body 231, and the height of the first filling body 231 is h5. , where h5 ranges from h/4 to h/2.

Setting an appropriate height of the first filling body 231 is conducive to occupying a large extent of the space in the liquid-filled area to reduce the filling amount of refrigerant, while retaining a sufficient amount of refrigerant in the liquid-filled area to ensure that all parts of the heat exchange section in the liquid-filled area are Contact with liquid refrigerant for sufficient heat exchange.

As shown in FIGS. 1 to 8 , in the heat exchange equipment of some embodiments, the falling film zone heat exchange section and the flooded liquid zone heat exchange section of the heat exchange coil 13 each include at least one coil section. As shown in Figure 3, the total height of the multiple coil sections of the falling film zone heat exchange section and the flooded zone heat exchange section is h. The filling part 23 includes a first filling body 231. Along the axial direction of the shell 11, the first The distance between the air guide inlet and outlet 21A and the end of the first filling body 231 away from the second end of the housing 11 is h6, where h6>h/6.

Properly setting the distance between the first air conduit inlet and outlet 21A and the top of the first filling body 231 away from the second end of the housing 11 will help ensure that the gas inhaled by the first air conduit inlet and outlet 21A carries less liquid droplets.

In the heat exchange equipment of some embodiments, the filling part 23 includes a second filling body 232. Along the radial direction of the shell 11, the distance between the second filling body 232 and the inner wall of the shell 11 is h7, where h7 ranges from 5 mm to 40 mm. .

Properly setting the distance between the second filling body 232 and the inner wall of the housing 11 along the radial direction of the housing 11 is conducive to forming a stable liquid refrigerant area at the bottom of the heat exchange section in the liquid-filled area.

As shown in FIGS. 1 to 8 , in some embodiments of the heat exchange equipment, the filling part 23 includes a second filling body 232 , and the second end of the housing 11 has a liquid outlet 1B, and the liquid outlet 1B is connected to the second filling body 232 . The radially outer sides of 232 are opposite.

Making the liquid outlet 1B face the radially outer side of the second filling body 232 facilitates the liquid outlet 1B to draw the liquid refrigerant from the interval between the radially outer side of the second filling body 232 and the inner wall surface of the housing 11 , which facilitates Prevent gas from being carried in liquid refrigerant.

As shown in FIGS. 1 to 8 , in some embodiments of the heat exchange device, the filling part 23 includes an accommodating space 23A, and the accommodating space 23A is configured to communicate with the space at the second end of the housing 11 outside the filling part 23 to toward the accommodation space 23A introduces liquid into the space at the second end of the housing 11, and at least one oil return port is located in the accommodation space 23A.

The liquid refrigerant in the accommodation space 23A is more stable because it is not easily disturbed. An oil-rich area 1D is gradually formed in the accommodation space 23A. The oil return port sucks the liquid refrigerant from the oil-rich area 1D, which can pump out more lubricating oil. Suction into the air guide pipe to improve the oil return effect.

As shown in Figures 4 and 5, in the heat exchange equipment of some embodiments, along the radial direction of the shell 11, the accommodation space 23A is located in the middle of the filling part 23. The filling part 23 also includes a communication part 23B, and the communication parts 23B are connected The accommodating space 23A and the space at the second end of the housing 11 located outside the filling part 23 are used to introduce the liquid in the space at the second end of the housing 11 into the accommodating space 23A.

By arranging the accommodation space 23A in the middle of the filling part 23 and then introducing the liquid in the space at the second end of the housing 11 into the accommodation space 23A through the communication part 23B, it is beneficial to form a more stable oil-rich zone in the accommodation space 23A. , thus helping to improve the oil return effect.

As shown in FIGS. 4 and 5 , in the heat exchange device of some embodiments, the communication portion 23B includes one or more through holes provided at the bottom of the accommodation space 23A and extending along the radial direction of the housing 11 .

The connecting portion 23B is configured to include one or more through holes extending along the radial direction of the housing 11 at the bottom of the accommodation space 23A, which is conducive to timely replenishment of the liquid in the accommodation space 23A and is conducive to ensuring the lubrication of the gas carried in the air guide tube 21 Oil content.

As shown in FIGS. 1 to 5 and 8 , in the heat exchange device of some embodiments, the air guide tube 21 is located outside the filling part 23 .

As shown in Figures 6 and 7, in the heat exchange equipment of some embodiments, a part of the air guide tube 21 is located in the accommodation space 23A.

The relative positions of the air guide pipe 21 and the filling part 23 can be flexibly set according to the structure and size of the oil return part 22 and the filling part 23, thereby improving the installation flexibility of the oil return device 2.

As shown in Figures 1 to 8, in the heat exchange equipment of some embodiments, the oil return part 22 includes an oil return hole 221 provided on the wall of the air guide pipe 21, and at least one oil return port is the oil return hole 221; and / or

The oil return part 22 includes an oil return hole 221 provided on the wall of the air guide pipe 21 and a liquid conduit 222 connected with the oil return hole 221. At least one oil return port is located on the liquid conduit 222; and/or

The oil return part 22 includes an oil return hole 221 provided on the wall of the air guide pipe 21 and a filter element 223 connected with the oil return hole 221. At least one oil return port is located on the filter element 223; and/or

The oil return part 22 includes an oil return hole 221 provided on the wall of the air guide pipe 21, a filter element 223 connected with the oil return hole 221, and a liquid conduit 222 connecting the oil return hole 221 and the filter element 223. At least one oil return hole 221 is connected to the oil return hole 221. The mouth is located over on the filter element 223.

At least one oil return port is an oil return hole 221, which is beneficial to simplifying the structure of the oil return part. At least one oil return port is located on the liquid conduit 222, which facilitates shortening the length of the air conduit 21 and reducing the weight of the oil return device. At least one oil return port is located on the filter element 223, which facilitates filtering impurities of the liquid refrigerant entering the oil return port and improves the cleanliness of the refrigerant in the refrigerant circuit.

Wherein, in the heat exchange equipment of some embodiments, the liquid conduit 222 is a capillary tube.

The liquid conduit 222 is a capillary tube, and the capillary action of the capillary tube uses liquid refrigerant to be sucked into the air conduit 21 from the oil return port.

As shown in FIGS. 6 and 7 , in the heat exchange equipment of some embodiments, the oil return part 22 includes a plurality of oil return ports, and at least two of the plurality of oil return ports have different heights.

At least two of the multiple oil return ports have different heights, which facilitates oil return from different liquid level heights and improves the oil return stability of the oil return device 2 .

In the heat exchange equipment of some embodiments, the air guide tube 21 is a U-shaped tube.

The air guide pipe 21 is a U-shaped pipe, which facilitates utilizing the entrainment effect of the U-shaped pipe to suck away the lubricating oil that is miscible with the liquid refrigerant in the liquid-filled area.

As shown in Figures 1 to 8, in the heat exchange equipment of some embodiments, the U-shaped tube is bent from a single tube.

The U-shaped pipe is bent from a single pipe to facilitate the smooth flow of fluid in the U-shaped pipe.

As shown in FIGS. 1 to 9 , in the heat exchange equipment of some embodiments, the U-shaped pipe is welded from multiple straight pipe sections.

The U-shaped pipe is welded from multiple straight pipe sections so that the distance between the two straight pipe sections of the U-shaped pipe can be made smaller, which facilitates the U-shaped pipe to be placed in a narrower space.

As shown in Figures 1 to 3, in some embodiments of the heat exchange equipment, the air guide tube 21 has a balance hole 21C provided on the tube wall. Along the axial direction of the housing 11, the balance hole 21C is located at the first air guide tube inlet and outlet 21A. and gas inlet and outlet port 1C.

A balance hole 21C is provided on the air guide pipe 21 to balance the air pressure inside and outside the air guide pipe 21 and facilitate oil return.

As shown in FIGS. 1 to 7 , in some embodiments of the heat exchange device, the air guide tube 21 is located radially inside the inner cylinder 12 .

The air guide pipe 21 is arranged radially inside the inner cylinder 12, which facilitates the concentric arrangement of the inner cylinder 12 and the outer shell 11, and facilitates the approximation of the heat exchange environment of each part of the heat exchange coil 13 along the circumferential direction, thereby facilitating the improvement of the tank type falling film heat exchanger. The heat exchange efficiency is 1.

As shown in FIG. 8 , in the heat exchange equipment of some embodiments, a part of the air guide tube 21 is located radially inside the inner cylinder 12 , and the other part is located radially outside the inner cylinder 12 .

A part of the air guide pipe 21 is located radially inside the inner cylinder 12, and the other part is arranged radially outside the inner cylinder 12, making the arrangement of the air guide pipe 21 more flexible. When the inner diameter of the inner cylinder 12 is small, the oil return device 2 can also be arranged. .

As shown in Figure 8, in some embodiments of the heat exchange equipment, the tank type falling film heat exchanger 1 also includes a gas-liquid separation device 16, and the gas-liquid separation device 16 is configured to separate the gas entering through the first air guide pipe inlet and outlet 21A. Liquid droplets in the gas in the air conduit 21.

In the heat exchange equipment of some embodiments, the gas-liquid separation device 16 is disposed at the second end of the inner cylinder 12 to separate liquid droplets in the gas entering the inner cylinder 12 , and the first air guide inlet and outlet 21A is located at the gas-liquid separation device 16 and the first end of the inner cylinder 12.

Providing the gas-liquid separation device 16 is beneficial to reducing liquid droplets carried in the gas in the air conduit 21 .

An embodiment of the present disclosure also provides a refrigeration circuit. The refrigeration circuit includes the heat exchange device of an embodiment of the present disclosure. The refrigeration circuit of the embodiment of the present disclosure has the advantages of the heat exchange device of the embodiment of the present disclosure.

An embodiment of the present disclosure also provides an air conditioning device, which includes the heat exchange device of the embodiment of the present disclosure.

The refrigeration circuit of the embodiment of the present disclosure has the advantages of the heat exchange device of the embodiment of the present disclosure.

Each embodiment of the present disclosure will be described in more detail below with reference to FIGS. 1 to 9 . In the embodiment shown in FIGS. 1 to 9 , the direction of each heat exchange device is the same as the direction after installation, wherein the axis of the housing 11 is arranged vertically, and the first end of the housing 11 is in the same direction as in FIGS. 1 to 9 corresponds to the upper end in , and the second end of the housing 11 corresponds to the lower end in FIGS. 1 to 9 . In the following description, in addition to describing the direction of the housing 11 , the direction or orientation may also be described in terms of the directions or orientations shown in FIGS. 1 to 9 , for example, the direction or orientation of the housing 11 or the inner cylinder 12 . One end can also be described as the upper end or top of the housing 11 or the inner cylinder 12, and the second end of the housing 11 or the inner cylinder 12 can also be described as the lower end or bottom end, etc.

Figure 1 is a schematic three-dimensional cross-sectional structural diagram of an embodiment of the present disclosure. Figures 2 and 3 are schematic cross-sectional structural views of the embodiment shown in Figure 1. As shown in FIGS. 1 to 3 , some embodiments of the present disclosure provide a heat exchange equipment. The heat exchange equipment includes a tank-type falling film heat exchanger 1 and an oil return device 2 .

The tank type falling film heat exchanger 1 includes an outer shell 11 , an inner cylinder 12 , a heat exchange coil 13 , a liquid distributor 14 and a liquid equalizing plate 15 .

The shell 11 includes an outer cylinder 111 , a first cover 112 covering the first end of the outer cylinder 111 , and a second cover 113 covering the second end of the cylinder 111 . The housing 11 has a liquid inlet 1A, a liquid outlet 1B and a gas inlet and outlet port 1C. The liquid inlet 1A and the gas inlet and outlet port 1C are both provided at the first end of the housing 11 . As shown in FIGS. 1 to 3 , the liquid inlet 1A and the gas inlet and outlet port 1C are both provided on the first cover 112 . The liquid outlet 1B is provided on the second side of the housing 11 end. As shown in FIGS. 1 to 3 , the liquid outlet 1B is provided on the side wall of the second end of the outer cylinder 111 .

As shown in FIGS. 1 to 3 , the first end of the inner cylinder 12 is fixed to the first end of the outer shell 11 , and the second end of the inner cylinder 12 is spaced apart from the second end of the outer shell 11 . The upper end of the inner cylinder 12 is fixedly connected to the inner wall surface of the first cover 112 of the outer shell 11 . Along the radial direction of the housing 11 , the liquid inlet 1A is located between the outer cylinder 111 and the inner cylinder 12 . Along the radial direction of the housing 11 , the gas inlet and outlet port 1C is located inside the inner cylinder 12 . There is a certain distance between the lower end of the inner cylinder 12 and the inner wall surface of the second cover 113 of the outer shell 11 . The inner cylinder 12 is coaxially arranged with the outer shell 11 .

The heat exchange coil 13 is arranged between the outer shell 11 and the inner cylinder 12 in the radial direction of the outer shell 11 . The heat exchange coil 13 includes a falling film zone heat exchange section arranged between the shell 11 and the inner cylinder 12 from the first end to the second end of the shell 11 and a falling film zone heat exchange section arranged from the second end of the shell 11 to the second end of the shell 11 The heat exchange section of the liquid-filled area.

Each of the falling film zone heat exchange section and the flooded liquid zone heat exchange section of the heat exchange coil 13 includes at least one coil section. Along the radial direction of the casing 11, each coiled pipe section may be single-layered or multi-layered. Along the radial direction of the casing 11, each coiled pipe section may be single-layered or multi-layered. The coil length, number of turns, and number of inner and outer layers of different heat exchange sections may be the same or different. The length, number of turns, and number of inner and outer layers of different coil sections of the same heat exchange section may be the same or different.

As shown in Figures 1 to 3, in some embodiments of the present disclosure, the falling film zone heat exchange section includes a first coil section 131 located below the liquid distributor 14 and a second disk located below the first coil section 131. Pipe segment 131. The first coil section 131, the second coil section 132 and their surrounding space constitute a falling film area. The heat exchange section in the liquid-filled area is located below the heat exchange section in the falling film area, and includes a third coil section 133 located below the second coil section 132 . The top of the third coil section 133 and the area below it constitute a liquid-filled area. In this embodiment, the bottom end of the inner cylinder 12 is suspended above the third coil section 133 and communicates with the falling film area.

The liquid distributor 14 can evenly distribute the liquid refrigerant on the heat exchange section of the falling film area. The liquid distributor 14 includes two inner and outer flat cylinders, an upper annular plate connecting the upper ends of the two flat cylinders, and a lower annular plate connecting the lower ends of the two flat cylinders. The liquid distributor 14 is coaxial with the outer cylinder 111 Set up and installed on the first cover 112. The upper ring plate opens at a position opposite to the liquid inlet 1A, allowing the annular space inside the liquid distributor 14 to communicate with the liquid inlet 1A, thereby receiving the liquid entering the housing 11 from the liquid inlet 1A. A plurality of first through holes 14A are evenly distributed on the lower annular plate. The liquid in the annular space of the liquid distributor 14 uniformly flows through the lower annular plate and evenly flows downward from the plurality of first perforations 14A to the falling film area, falls on the heat exchange section of the falling film area, and exchanges with the falling film area. The hot section performs membrane heat exchange. In some alternative embodiments, it is also possible to arrange further layers of annular plates with a plurality of first perforations spaced apart from the upper annular plate and the lower annular plate.

Along the axial direction of the housing 11, the liquid leveling disk 15 is disposed between the first coil section 131 and the second coil section 132. The liquid leveling pan 15 has a plurality of second through holes 15A, and the liquid leveling pan 15 can divert the flow. The liquid refrigerant passing through the first coil section 131 is evenly arranged on the second coil section 132, and the heat exchange efficiency between the second coil section 132 and the liquid refrigerant is high.

As shown in FIGS. 1 to 3 , the oil return device 2 includes an air guide pipe 21 , an oil return part 22 and a filling part 23 .

The air guide tube 21 is connected with the gas inlet and outlet port 1C of the housing 11 and includes a first air guide tube inlet and outlet 21A. The first air guide inlet and outlet 21A is located inside the inner cylinder 12 and between the gas inlet and outlet port 1C and the liquid-filled area heat exchange section along the axial direction of the shell 11 . The air guide tube 21 is a U-shaped tube. U-shaped tubes are bent from a single tube. The two straight pipe sections of the air guide pipe 21 have different lengths. The first air guide inlet and outlet 21A is a port located in a short straight pipe section of the U-shaped pipe. The port of the longer straight section of the air guide tube 21 is the second air guide tube inlet and outlet 21B. The longer straight section of the air guide tube passes through the gas inlet and outlet 1C, so that the air guide tube 21 allows the gas entering the first air guide tube inlet and outlet 21A to flow through the gas inlet and outlet 1C and then flow out of the housing 11 from the second air guide tube inlet and outlet 21B. outside.

As shown in FIGS. 1 to 3 , the air guide tube 21 has a balance hole 21C provided on the tube wall. Along the axial direction of the housing 11 , the balance hole 21C is located between the first air guide tube inlet and outlet 21A and the gas inlet and outlet port 1C.

The oil return part 22 includes an oil return port. The oil return port is connected to the hollow part of the air guide pipe 21 between the first air guide pipe inlet and outlet 21A and the gas inlet and outlet port 1C. between one end of the liquid area heat exchange section close to the falling film area heat exchange section and the inner wall surface of the second end of the shell 11 . The oil return port is specifically connected to the hollow portion at the lowest end of the elbow portion of the U-shaped pipe. Along the radial direction of the outer shell 11, the U-shaped tube is located inside the inner cylinder 12.

As shown in FIGS. 1 to 3 , the oil return part 22 includes an oil return hole 221 provided on the wall of the air guide pipe 21 , a filter element 223 connected with the oil return hole 221 , and a filter element connecting the oil return hole 221 and the filter element 223 . The liquid conduit 222 and at least one oil return port are located on the filter element 223. The catheter 222 is a capillary tube. In this embodiment, the filter element 223 is specifically a filter, which includes an upper mounting portion and a lower filter. The upper end of the mounting portion is connected to the bottom end of the conduit 222 . The lower end of the installation part is connected to the filter screen. The oil return port includes a plurality of meshes of the filter.

The filling part 23 is disposed in the space at the second end of the shell 11 and is located between one end of the liquid-filled zone heat exchange section close to the falling film zone heat exchange section and the inner wall surface of the second end of the shell 11 , that is, the filling part 23 is disposed in the shell In the bottom space of 11 and between the outer edge of the upper end of the heat exchange section in the liquid-filled area and the inner wall surface of the bottom of the shell 11.

The filling part 23 may be made of, for example, nylon, plastic, or other materials.

As shown in FIGS. 1 to 3 , the filling part 23 includes a first filling body 231 located in the radial middle of the liquid-filled area heat exchange section and a first filling body 231 located between the liquid-filled area heat exchange section and the inner wall surface of the second end of the shell 11 The second filling body 232. The first filling body 231 and the second filling body 232 are integrally provided.

As shown in FIGS. 1 to 3 , along the radial direction of the housing 11 , the second filling body 232 is larger in size than the first filling body 231 and protrudes radially outward of the housing 11 relative to the first filling body 231 . Along the radial direction of the housing 11, the side surface of the second filling body 232 is spaced apart from the inner wall surface of the housing 11, and the oil return port is located on the side of the second filling body 232 away from the second end of the housing 11 along the axial direction of the housing 11, that is, Located on the upper side of the second filling body 232 . Figure 1 As shown in FIG. 3 , the filling part 23 includes a second filling body 232 . The second end of the housing 11 has a liquid outlet 1B. The liquid outlet 1B is opposite to the radially outer side of the second filling body 232 .

As shown in FIGS. 1 to 3 , in some embodiments of the heat exchange device, the first filling body 231 includes a first rotary body in the same axial direction as the housing 11 , and the second filling body 232 includes an axis in the same direction as the housing 11 . to the second rotating body in the same direction. In Figures 1 to 3, both the first rotary body and the second rotary body are cylinders. In an embodiment that is not shown in the figures, the first rotary body and the second rotary body may be of other shapes. For example, the first rotary body and the second rotary body may also be rotary bodies whose generatrices are straight lines or polylines inclined to their own axes. It can also be a body of revolution in which the busbar is a concave or convex curve toward its own axis, or a body of revolution in which the busbar is a combination of a straight line and a curve, etc.

As shown in Figures 1 to 3, the first rotary body, the second rotary body and the housing 11 are coaxially arranged.

As shown in Figure 3, the total height of the multiple coil sections of the falling film zone heat exchange section and the flooded liquid zone heat exchange section is h. Among them, the height of the first coil section 131 is h1, the height of the second coil section 132 is h2, the height of the third coil section 133 is h3, and the total height h is the sum of h1, h2 and h3. In Figure 3, h4 is the radius of the internal space of the housing 11. The filling part 23 includes a first filling body 231. The height of the first filling body 231 is h5, where h5 ranges from h/4 to h/2. For example, h5=h/3. h5 being in this range is beneficial to matching the liquid level in the full liquid area. The liquid level height in the full liquid area is related to the ratio of the heat exchange area of the heat exchange section in the full liquid area to the total heat exchange area of the heat exchange coil. This ratio is generally 25% to 50%. Along the axial direction of the housing 11, the distance between the first air guide inlet and outlet 21A and the end of the first filling body 231 away from the second end of the housing 11 is h6, where h6>h/6. For example, h6=h/4. Properly setting the range of h6 can prevent larger droplets from splashing into the first air conduit inlet and outlet 21A and causing the suction to carry liquid. Along the radial direction of the housing 11, the distance between the second filling body 232 and the inner wall of the housing 11 is h7, where h7 ranges from 5 mm to 40 mm. For example h7 can be 25mm. Properly setting the size of h7 is conducive to forming a stable liquid refrigerant in the gap between the second filling body 232 and the outer shell 11, and at the same time preventing debris from clogging the liquid outlet 1B.

As shown in FIGS. 1 to 3 , the filling part 23 includes an accommodating space 23A. The accommodating space 23A is configured to communicate with the space at the second end of the housing 11 outside the filling part 23 to introduce the second end of the housing 11 into the accommodating space 23A. For liquid in the spaces at both ends, at least one oil return port is located in the accommodation space 23A. In the embodiment shown in FIGS. 1 to 3 , the accommodating space 23A is an installation groove provided along the radial direction of the first rotary body. The depth of the installation groove is greater than the radius of the first rotary body. The filter and conduit 232 are located approximately in the radial middle of the first rotary body.

As shown in FIGS. 1 to 3 , in some embodiments of the heat exchange device, the air guide tube 21 is located outside the filling part 23 .

In this embodiment, an installation groove is opened on the side of the first rotating body as the first filling body 231 of the filling part 23 as the accommodation space 23A. The solid part of the filling part 23 fills part of the liquid-filled area, which reduces the heat exchange rate. equipment The refrigerant charging amount of the refrigeration circuit and air conditioning equipment where it is located creates an oil-rich area in the accommodation space 23A. The lower end of the capillary tube and the filter tip extend into the accommodation space 23A, and the liquid refrigerant in the oil-rich area is continuously sucked in through the entrainment pressure difference of the U-shaped tube to achieve the purpose of oil return.

The installation groove provided in the filling part 23 is not limited to the straight shape shown in Figures 1 to 3, and any shape can be used to allow the capillary tube and the filter to be placed in the installation groove. The capillary tube does not have to be placed vertically downward as shown in Figures 1 to 3, it can also be placed at an angle.

The heat exchange device of the embodiment of the present disclosure can be applied in a refrigeration circuit or an air conditioning device. The refrigeration circuit or air-conditioning equipment may include a compressor, a first heat exchanger, a throttling device and a second heat exchanger connected in sequence through a refrigerant pipeline. If the refrigeration circuit or air-conditioning equipment can both cool and heat, it can also Includes a four-way valve to switch the refrigerant flow direction. The heat exchange device of this embodiment can be used as the first heat exchanger or the second heat exchanger of a refrigeration circuit or air conditioning device.

When the heat exchange device serves as an evaporator, the surroundings of the third coil section 133 are filled with liquid refrigerant. The filling part 23 reduces the volume of the liquid refrigerant in the full liquid area and reduces the agitation of the liquid refrigerant in the full liquid area. The lubricating oil (which is slightly denser than the refrigerant and partially miscible with the refrigerant) is deposited at the bottom and forms an oil-rich area 1D. The capillary tube connected to the U-shaped tube and the filter on it extend into the installation groove of the filling part. The liquid refrigerant mixed with lubricating oil passes through the filter to filter out small foreign matter and then enters the capillary tube. The liquid refrigerant entering the interior of the shell 11 is heated and evaporated into gaseous refrigerant by the heat exchange coil 13 . The gaseous refrigerant enters from the first gas inlet and outlet 21A of the U-shaped tube and flows out of the heat exchange device from the second gas inlet and outlet 21B of the U-shaped tube through the gas inlet and outlet 1C. The gas entering the U-shaped tube forms a high-speed gas flow field in the U-shaped tube. The high-speed flowing gaseous refrigerant in the U-shaped tube absorbs the liquid refrigerant mixed with lubricating oil through the oil return hole 221 on the U-shaped tube and takes it out of the heat exchange equipment back to the heat exchanger. compressor.

When the heat exchange device is used as a condenser, the gas enters the U-shaped tube from the second gas inlet and outlet 21B and flows out from the first gas inlet and outlet 21A into the inner cylinder 12, and then fills the entire internal space of the shell 11. In the heat exchange coil 13 Condensation on surfaces. At this time, a liquid seal is formed between the second filling body 232 of the filling part 23 and the outer cylinder 112 to prevent gas from flowing out of the liquid outlet 1B without being condensed.

Figure 4 is a schematic three-dimensional cross-sectional structural diagram of an embodiment of the present disclosure. FIG. 5 is a schematic cross-sectional structural view of the embodiment shown in FIG. 4 . The heat exchange equipment of some embodiments shown in Figures 4 and 5 differs from the embodiments shown in Figures 1 to 3 in that:

The air guide tube 21 is not provided with a balancing hole. Along the radial direction of the housing 11, the accommodation space 23A is located in the middle of the filling part 23. The filling part 23 also includes a communication part 23B. The communication part 23B communicates the accommodation space 23A with the space at the second end of the housing 11 outside the filling part 23. The liquid in the space at the second end of the housing 11 is introduced into the accommodation space 23A. The communication portion 23B includes two through holes provided at the bottom of the accommodation space 23A and extending in the radial direction of the housing 11 .

For the unexplained parts of the embodiments corresponding to FIGS. 4 to 5 , reference can be made to the relevant descriptions of the embodiments corresponding to FIGS. 1 to 3 .

Figure 6 is a schematic three-dimensional cross-sectional structural diagram of an embodiment of the present disclosure. FIG. 7 is a schematic cross-sectional structural view of the embodiment shown in FIG. 6 . The heat exchange equipment of some embodiments shown in Figures 6 and 7 differs from the embodiments shown in Figures 1 to 3 in that:

The air guide tube 21 is not provided with a balance hole. A part of the air guide tube 21 is located in the accommodation space 23A. The oil return part 22 has three oil return ports with different heights. The oil return part 22 includes three oil return holes 221 provided on the wall of the air guide pipe 21 and a filter element 223 connected with the oil return hole 221 at the lowest point. An oil return port is located on the filter element 223. The filter element 223 is directly connected to the corresponding oil return port 221. The two oil return ports at higher positions are respectively two oil return holes 221 provided on the wall of the air guide pipe 21 .

For the unexplained parts of the embodiments corresponding to FIGS. 6 to 7 , reference can be made to the relevant descriptions of the embodiments corresponding to FIGS. 1 to 3 .

Figure 8 is a schematic cross-sectional structural diagram of an embodiment of the present disclosure. The difference between the heat exchange device of the embodiment shown in Figure 8 and the embodiment shown in Figures 1 to 3 is that:

The inner cylinder 12 and the outer shell 11 are arranged eccentrically. Along the radial direction of the housing 11 , the gas inlet and outlet port 1C is located between the outer cylinder 111 and the inner cylinder 12 . A part of the air guide tube 21 is located radially inside the inner cylinder 12 , and the other part is located radially outside the inner cylinder 12 . The straight pipe section where the first air guide inlet and outlet 21A of the U-shaped pipe is located is located radially inside the inner cylinder 12, and the other straight pipe section is located radially outside and is connected to the gas inlet and outlet port 1C.

In addition, as shown in FIG. 8 , the tank-type falling film heat exchanger 1 also includes a gas-liquid separation device 16 . The gas-liquid separation device 16 is configured to separate the liquid in the gas entering the gas pipe 21 through the first gas pipe inlet and outlet 21A. drop. The gas-liquid separation device 16 is disposed at the second end of the inner cylinder 12 to separate liquid droplets in the gas entering the inner cylinder 12. The first air guide inlet and outlet 21A is located between the gas-liquid separation device 16 and the first end of the inner cylinder 12. . The gas-liquid separation device 16 includes, for example, an orifice plate and/or a filter screen.

For the unexplained parts of the embodiment corresponding to Figure 8 , reference can be made to the relevant descriptions of the embodiments corresponding to Figures 1 to 3 .

Figure 9 is a schematic structural diagram of a U-shaped tube in some alternative embodiments of the present disclosure. The U-shaped pipe of the air guide pipe 21 is welded by multiple straight pipe sections. The U-shaped tube disclosed in Figure 9 can replace the U-shaped tube of any of the previous embodiments.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure and not to limit it; although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the present disclosure can still be modified Modifications to the disclosed specific embodiments or equivalent substitutions of some of the technical features shall be covered by the scope of the technical solution claimed in this disclosure.

Claims

A heat exchange device including:

Tank-type falling film heat exchanger (1) includes an outer shell (11), an inner cylinder (12) and a heat exchange coil (13). The axial first end of the outer shell (11) has a liquid inlet (1A ) and gas inlet and outlet ports (1C). The heat exchange coil (13) is arranged between the outer shell (11) and the inner cylinder (12) in the radial direction of the outer shell (11). The heat coil (13) includes a falling film zone heat exchange section arranged between the outer shell (11) and the inner cylinder (12) from the first end of the outer shell (11) to the axial second end. and a flooded zone heat exchange section arranged from the falling film zone heat exchange section to the second end of the shell (11); and

The oil return device (2) includes an air guide pipe (21), an oil return part (22) and a filling part (23). The air guide pipe (21) is connected to the gas inlet and outlet port (1C) of the housing (11) and It includes a first air guide inlet and outlet (21A) located in the gas phase area of the inner cylinder (12). The oil return part (22) includes one or more oil return ports, and the oil return port is connected with the air guide tube. The hollow part of (21) between the first air guide inlet and outlet (21A) and the gas inlet and outlet (1C) is connected, and the filling part (23) is provided on the second side of the housing (11). in the space at the end, and the oil return port and the filling part (23) are located along the axial direction of the housing (11) between one end of the liquid-filled area heat exchange section and close to the falling film area heat exchange section. between the inner wall surfaces of the second end of the housing (11).
The heat exchange equipment according to claim 1, wherein the filling part (23) includes a first filling body (231) located in the radial middle of the liquid-filled area heat exchange section and/or located in the liquid-filled area. A second filling body (232) between the heat exchange section and the inner wall surface of the second end of the shell (11).
The heat exchange device according to claim 2, wherein

Along the radial direction of the housing (11), the size of at least a part of the second filling body (232) is larger than the size of the first filling body (231) and is oriented relative to the first filling body (231). The radially outer side of the housing (11) protrudes; and/or

Along the radial direction of the housing (11), the side surface of the second filling body (232) is spaced apart from the inner wall surface of the housing (11); and/or

The oil return port is located on a side of the second filling body (232) away from the second end of the housing (11) along the axial direction of the housing (11).
The heat exchange device according to claim 2 or 3, wherein the first filling body (231) and the second filling body (232) are provided integrally.
The heat exchange device according to any one of claims 2 to 4, wherein

The first filling body (231) includes a first rotating body in the same axial direction as the housing (11); and/or

The second filling body (232) includes a second rotating body in the same axial direction as the housing (11).
The heat exchange device according to claim 5, wherein

The first rotary body and the second rotary body are coaxially arranged; and/or

At least one of the first rotary body and the second rotary body is coaxially arranged with the housing (11).
The heat exchange equipment according to any one of claims 2 to 6, wherein the falling film zone heat exchange section and the flooded liquid zone heat exchange section of the heat exchange coil (13) each include at least one disk. Pipe section, the total height of the multiple coil sections of the falling film zone heat exchange section and the liquid filled zone heat exchange section is h, the filling part (23) includes the first filling body (231), The height of the first filling body (231) is h5, where h5 ranges from h/4 to h/2.
The heat exchange equipment according to any one of claims 2 to 7, wherein the falling film zone heat exchange section and the flooded liquid zone heat exchange section of the heat exchange coil (13) each include at least one disk. Pipe section, the total height of the multiple coil sections of the falling film zone heat exchange section and the liquid filled zone heat exchange section is h, the filling part (23) includes the first filling body (231), Along the axial direction of the housing (11), the distance between the first air guide inlet and outlet (21A) and the end of the first filling body (231) away from the second end of the housing (11) is h6, Among them, h6>h/6.
The heat exchange device according to any one of claims 2 to 8, wherein the filling part (23) includes the second filling body (232), and the second filling body (232) is formed along the radial direction of the housing (11). The distance between the two filling bodies (232) and the inner wall of the shell (11) is h7, where h7 ranges from 5 mm to 40 mm.
The heat exchange device according to any one of claims 2 to 9, wherein the filling part (23) includes the second filling body (232), and the second end of the housing (11) has a liquid outlet (1B), the liquid outlet (1B) is opposite to the radially outer side surface of the second filling body (232).
The heat exchange device according to any one of claims 1 to 10, wherein the filling part (23) includes an accommodation space (23A) configured to be in contact with the filling part (23A). 23) The space at the second end of the outer casing (11) is connected to introduce the liquid in the space at the second end of the casing (11) into the accommodation space (23A), and at least one of the oil return ports is located therein. in the accommodation space (23A).
The heat exchange device according to claim 11, wherein the accommodation space (23A) is located in the middle of the filling part (23) along the radial direction of the housing (11), and the filling part (23) further It includes a communication part (23B) that communicates the accommodation space (23A) with the space at the second end of the housing (11) outside the filling part (23) to provide the space to the accommodation space (23A). The liquid is introduced into the space at the second end of the housing (11) through the placement space (23A).
The heat exchange device according to claim 12, wherein the communication part (23B) includes one or more through holes provided at the bottom of the accommodation space (23A) and extending along the radial direction of the housing (11). .
The heat exchange device according to any one of claims 11 to 13, wherein

The air guide tube (21) is located outside the filling part (23); or

A part of the air guide tube (21) is located in the accommodation space (23A).
The heat exchange device according to any one of claims 1 to 14, wherein

The oil return part (22) includes an oil return hole (221) provided on the wall of the air guide pipe (21), and at least one of the oil return ports is the oil return hole (221); and/or

The oil return part (22) includes an oil return hole (221) provided on the wall of the air guide pipe (21) and a liquid conduit (222) connected with the oil return hole (221). At least one The oil return port is located on the conduit pipe (222); and/or

The oil return part (22) includes an oil return hole (221) provided on the wall of the air guide pipe (21) and a filter element (223) connected with the oil return hole (221). At least one The oil return port is located on the filter element (223); and/or

The oil return part (22) includes an oil return hole (221) provided on the wall of the air guide pipe (21), a filter element (223) connected to the oil return hole (221), and a filter element (223) connected to the oil return hole (221). The oil return hole (221) and the filter element The liquid conduit (222) of the component (223), at least one of the oil return ports is located on the filter element (223).
The heat exchange device according to claim 15, wherein the liquid conduit (222) is a capillary tube.
The heat exchange device according to any one of claims 1 to 16, wherein the oil return part (22) includes a plurality of oil return ports, at least two of the plurality of oil return ports. The height is different.
The heat exchange equipment according to any one of claims 1 to 17, wherein the air guide pipe (21) is a U-shaped pipe.
The heat exchange equipment according to claim 18, wherein the U-shaped pipe is formed by bending a single pipe or the U-shaped pipe is formed by welding multiple straight pipe sections.
The heat exchange equipment according to any one of claims 1 to 19, wherein the air guide tube (21) has a balance hole (21C) provided on the tube wall, along the axial direction of the housing (11), the The balance hole (21C) is located between the first gas inlet and outlet (21A) and the gas inlet and outlet (1C).
The heat exchange device according to any one of claims 1 to 20, wherein

The air guide tube (21) is located radially inside the inner cylinder (12); or

A part of the air guide tube (21) is located radially inside the inner cylinder (12), and the other part is located radially outside the inner cylinder (12).
The heat exchange equipment according to any one of claims 1 to 21, wherein the tank type falling film heat exchanger (1) further includes a gas-liquid separation device (16), and the gas-liquid separation device (16) is It is configured to separate liquid droplets in the gas entering the air guide tube (21) through the first air guide tube inlet and outlet (21A).
The heat exchange equipment according to claim 22, wherein the gas-liquid separation device (16) is disposed at the second end of the inner cylinder (12) to separate liquid droplets in the gas entering the inner cylinder (12). , the first air guide inlet and outlet (21A) is located between the gas-liquid separation device (16) and the first end of the inner cylinder (12).
A refrigeration circuit includes a heat exchange device, wherein the heat exchange device is the heat exchange device according to any one of claims 1 to 23.
An air conditioning device includes a heat exchange device, wherein the heat exchange device is the heat exchange device according to any one of claims 1 to 23.