CN115574489A

CN115574489A - Tank type heat exchanger and air conditioning system

Info

Publication number: CN115574489A
Application number: CN202211246064.0A
Authority: CN
Inventors: 卢杏斌; 胡海利; 岳清学; 王小勇
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-01-06
Also published as: WO2024078274A1

Abstract

The present disclosure provides a tank heat exchanger and an air conditioning system. The tank heat exchanger includes: an outer cylinder; the outer cylinder is arranged in parallel with the axis of the inner cylinder and forms an annular space with the inner cylinder; a first heat exchange tube; the liquid equalizing disc is positioned on one side, close to the axial first end of the tank type heat exchanger, of the first heat exchange tube, and a gas channel is formed between the radial outer end of the liquid equalizing disc and the wall of the outer cylinder, and/or a gas channel is formed between the radial inner end of the liquid equalizing disc and the wall of the inner cylinder; and the shielding part forms an axial interval with the liquid-equalizing disc, the shielding part comprises a shielding main body, the shielding main body is positioned on one side of the liquid-equalizing disc, which faces to the axial first end of the tank-type heat exchanger, the shielding main body completely covers the corresponding gas channel, one of the radial inner end and the radial outer end of the shielding main body is a connecting end, the other end is a free end, the connecting end is in sealing connection with one of the cylinder wall of the inner cylinder and the cylinder wall of the outer cylinder, and the free end forms an interval with the cylinder wall of the inner cylinder and the other of the cylinder wall of the outer cylinder.

Description

Tank type heat exchanger and air conditioning system

Technical Field

The disclosure relates to the technical field of air conditioners, in particular to a tank type heat exchanger and an air conditioning system.

Background

The falling film evaporator is used as a novel high-efficiency energy-saving device, and is widely applied to water cooling units due to the advantages of small refrigerant filling amount, small hydrostatic pressure difference, high heat exchange efficiency, convenience in oil return and the like. However, it is not ideal for units less than 100RT due to structural limitations. Therefore, only dry evaporators or double-tube heat exchangers, which are less energy-efficient, can generally be used in these units.

In the related art, some falling film evaporators are provided with a liquid equalizing device for receiving a liquid refrigerant flowing from an upper side, and making the liquid refrigerant equally divided and then flow to a coil pipe of a lower falling film area. However, the refrigerant entering the evaporator may not be in a pure liquid state, and the liquid refrigerant often contains a certain amount of gaseous refrigerant. After the liquid refrigerant is subjected to evaporation heat exchange through the heat exchange coil above the liquid homogenizing plate, a part of gaseous refrigerant is generated. The density of the gaseous refrigerant is far lower than that of the liquid refrigerant, so that the average flow velocity passing through the holes or the slits on the liquid homogenizing disc is greatly increased, the pressure drop of the fluorine side in the heat exchanger is increased, the liquid refrigerant is easy to sputter and bias, and the liquid refrigerant is not beneficial to liquid distribution and falling film evaporation of the liquid refrigerant on the heat exchange coil below the liquid homogenizing device.

Disclosure of Invention

An object of the present disclosure is to provide a tank type heat exchanger and an air conditioning system.

A first aspect of the present disclosure provides a tank heat exchanger provided with a working medium inlet and a working medium outlet, the tank heat exchanger including:

an outer cylinder;

the inner cylinder is communicated with the outer cylinder, the outer cylinder and the inner cylinder are arranged in parallel, and an annular space is formed between the inner cylinders;

the first heat exchange tube is coiled in the outer barrel;

a liquid-equalizing disc fixedly arranged in the annular space relative to the outer cylinder and the inner cylinder and positioned on one side of the first heat exchange tube close to the axial first end of the tank-type heat exchanger, wherein the radial outer end of the liquid-equalizing disc and the wall of the outer cylinder form a gas channel, and/or the radial inner end of the liquid-equalizing disc and the wall of the inner cylinder form a gas channel; and

the shielding part is fixedly arranged in the annular space and forms an axial interval with the liquid-equalizing disc, the shielding part comprises a shielding main body corresponding to the gas channel, the shielding main body is positioned on one side of the first axial end of the liquid-equalizing disc and along the radial direction of the tank-type heat exchanger, the shielding main body completely covers the corresponding gas channel, one of the radial inner end and the radial outer end of the shielding main body is in sealing connection with the cylinder wall of the inner cylinder and one of the cylinder walls of the outer cylinder, and the other one of the radial inner end and the radial outer end of the shielding main body and the cylinder wall of the inner cylinder and the other one of the cylinder walls of the outer cylinder form an interval.

According to some embodiments of the disclosure, one of the radially inner end and the radially outer end of the liquid-homogenizing disk forms a seal with one of the wall of the outer barrel and the wall of the inner barrel, and the other of the radially inner end and the radially outer end of the liquid-homogenizing disk forms the gas passage with the other of the wall of the outer barrel and the wall of the inner barrel.

In accordance with some embodiments of the present disclosure,

the radial outer end of the liquid homogenizing disc is connected with the inner wall of the outer barrel in a sealing mode, and the radial inner end of the liquid homogenizing disc and the outer wall of the inner barrel form the gas channel;

the radial inner end of the shielding main body is fixedly connected with the outer wall of the inner barrel.

According to some embodiments of the present disclosure, the gas channel is annular in a cross section perpendicular to an axial direction of the can heat exchanger.

According to some embodiments of the disclosure, the shielding body is a baffle perpendicular to an axial direction of the tank heat exchanger.

According to some embodiments of the disclosure, the shield portion further comprises an edge plate connected to the free end of the shield body and extending towards an axial second end of the tank heat exchanger.

According to some embodiments of the disclosure, the shielding main body is a baffle plate extending from the connecting end to the free end toward a direction close to the soaking plate.

According to some embodiments of the disclosure, the baffle is a flat plate or an arcuate plate.

According to some embodiments of the disclosure, the liquid distributor further comprises a plurality of flow guide portions, the flow guide portions are arranged at the edge of one side, close to the liquid homogenizing disc, of the shielding portion at intervals and extend towards the direction close to the liquid homogenizing disc.

In accordance with some embodiments of the present disclosure,

the liquid equalizing disc is of a groove structure which is recessed from the first axial end to the second axial end of the falling film evaporator;

wherein the flow guide extends partially into the groove structure, or an edge of the flow guide near an axial second end of the falling film evaporator and an edge of the groove structure near an axial first end of the falling film evaporator are aligned in an axial direction of the can heat exchanger.

According to some embodiments of the disclosure, the inner barrel is a cylindrical or polygonal barrel.

According to some embodiments of the disclosure, the heat exchanger further comprises a U-shaped pipe, a plane where a pipe center line of the U-shaped pipe is located is arranged along the radial direction of the tank type heat exchanger, a first end of the U-shaped pipe is arranged in the inner cylinder and communicated with the inner cylinder, and a second end of the U-shaped pipe is used for being connected with a gaseous working medium pipeline to lead in or lead out gaseous working medium.

In accordance with some embodiments of the present disclosure,

the working medium inlet comprises a liquid inlet which is arranged at the first axial end of the outer cylinder and used for leading in liquid working medium, and the working medium outlet comprises a gaseous working medium port which is communicated with the inner cylinder and used for leading out gaseous working medium; and/or

The working medium inlet comprises a gaseous working medium port communicated with the inner cylinder and used for leading in gaseous working medium, and the working medium outlet comprises a liquid outlet arranged at the axial second end of the outer cylinder and used for leading out liquid working medium.

According to some embodiments of the disclosure, further comprising:

the second heat exchange tube is coiled in the outer barrel and is positioned on one side, far away from the liquid homogenizing disc, of the shielding part; and/or

And the third heat exchange tube is coiled in the outer barrel and is positioned on one side of the first heat exchange tube, which is far away from the liquid-equalizing disc.

According to some embodiments of the disclosure, the outer cylinder includes a cylinder body provided dividedly in a radial direction of the tank heat exchanger, a first end cover closed at an axial first end of the cylinder body, and a second end cover closed at an axial second end of the cylinder body, the axial first end of the inner cylinder being connected to the first end cover.

A second aspect of the present disclosure is an air conditioning system including the tank heat exchanger according to the first aspect of the present disclosure.

The embodiment of the disclosure provides a pot-type heat exchanger has liquid and gaseous two-phase working medium in inside and flows under the state, and gaseous working medium accessible shielding part and the axial interval and the gas passage between the liquid-distributing disk flow from top to bottom, and wherein liquid working medium accessible liquid-distributing disk flows down, and gaseous working medium has independent flow space, consequently can reduce the average velocity of flow of liquid working medium to play the effect that reduces the pressure drop of working medium in the heat exchanger. And the shielding part can play a role in recovering the liquid working medium flowing down on the cylinder wall, and the liquid working medium flowing down on the cylinder wall is guided into the liquid homogenizing disc, so that the waste of the falling film liquid can be reduced, and the heat exchange efficiency is favorably improved.

The air conditioning system provided by the embodiment of the disclosure has the advantages of the tank type heat exchanger provided by the embodiment of the disclosure.

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

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

FIG. 1 is a schematic structural view of a tank heat exchanger according to some embodiments of the present disclosure.

Fig. 2 is a sectional view schematically showing the tank type heat exchanger shown in fig. 1.

Fig. 3 is a partially enlarged structural view of the location of the tank heat exchanger shown in fig. 2.

FIG. 4 is a schematic structural view of a baffle portion of a can heat exchanger according to some embodiments of the present disclosure.

FIG. 5 is a schematic view of a baffle portion of a tank heat exchanger according to further embodiments of the present disclosure.

FIG. 6 is a schematic structural view of a flow guide portion of a can heat exchanger according to some embodiments of the present disclosure.

FIG. 7 is a schematic structural view of a tank heat exchanger according to further embodiments of the present disclosure.

In fig. 1 to 6, each reference numeral represents:

1. an outer cylinder; 10. a liquid inlet; 11. a barrel; 12. a first end cap; 13. a liquid outlet; 14. a second end cap; 2. an inner barrel; 3. a falling film area heat exchange tube; 31. a first heat exchange tube; 32. a second heat exchange tube; 4. a liquid homogenizing disc; 40. a homogenization hole; 5. a shielding portion; 51. a baffle plate; 52. an edge plate; 6. a flow guide part; 7. a U-shaped tube; 70. a gaseous working medium port; 8. a liquid distributor; 9. and a third heat exchange tube. G. A gas channel.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present disclosure.

In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are presented only for the convenience of describing and simplifying the disclosure, and in the absence of a contrary indication, these directional terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

As shown in fig. 1 to 7, some embodiments of the present disclosure provide a tank heat exchanger provided with a working medium inlet and a working medium outlet, the tank heat exchanger including an outer cylinder 1, an inner cylinder 2, a first heat exchange pipe 31, a liquid-equalizing disc 4, and a shielding portion 5.

The inner cylinder 2 is communicated with the outer cylinder 1, the outer cylinder 1 and the inner cylinder 2 are arranged in parallel in the axial direction, and an annular space is formed between the inner cylinders 2.

The first heat exchange pipe 31 is wound inside the outer tube 1.

And the liquid equalizing disc 4 is fixedly arranged in the annular space relative to the outer cylinder 1 and the inner cylinder 2 and is positioned on one side of the first heat exchange tube 31 close to the axial first end of the tank type heat exchanger, the radial outer end of the liquid equalizing disc 4 and the wall of the outer cylinder 1 form a gas channel G, and/or the radial inner end of the liquid equalizing disc 4 and the wall of the inner cylinder 2 form a gas channel G.

Shielding part 5, for urceolus 1 and inner tube 2 set up in annular space and form the axial interval with equal liquid dish 4 fixedly, shielding part 5 includes the main part that shelters from that corresponds with gas passage G, shelters from that the main part is located equal liquid dish 4 one side towards the first end of axial of pot heat exchanger, and along the radial of pot heat exchanger, shelters from the main part and covers corresponding gas passage G completely, shelters from one of the radial inner end and the radial outer end of main part and is the link, and another is the free end, link and the section of thick bamboo wall of inner tube 2 and the section of thick bamboo wall one sealing connection of urceolus 1, the free end forms the interval with the section of thick bamboo wall of inner tube 2 and the section of thick bamboo wall another of urceolus 1.

In the following description of the present disclosure, it is understood that, in a use state of the can type heat exchanger, the axial direction of the outer tub 1 is the up-down direction, the axial first end of the outer tub 1 is the top end, and the axial second end is the bottom end.

The tank heat exchanger of the present disclosure may be a falling film heat exchanger, a flooded heat exchanger, or other form of heat exchanger, and may function as an evaporator or condenser. The tank type heat exchanger may be used for an air conditioning system, but is not limited to the air conditioning system. When the tank type heat exchanger is used in an air conditioning system, the working medium can be a refrigerant.

For example, in the embodiment shown in fig. 1 and 2, the axial two ends of the outer cylinder 1 are closed, the axial dimension of the inner cylinder 2 along the tank heat exchanger may be smaller than that of the outer cylinder 1 along the tank heat exchanger, the axial first end of the inner cylinder 2 is connected to the axial first end of the outer cylinder 1, and the axial second end of the inner cylinder 2 is communicated with the outer cylinder 1. In some embodiments, not shown in the drawings, the dimensions of the outer cylinder 1 and the inner cylinder 2 along the axial direction of the tank heat exchanger may also be the same, both axial ends of the inner cylinder 2 are connected to the outer cylinder 1, and the inner cylinder 2 and the outer cylinder 1 may communicate through an opening or a pipeline on the inner cylinder 2.

The working medium inlet and the working medium outlet can be arranged at different positions of the tank-type heat exchanger according to the type selection requirement of the heat exchanger, such as an axial first end and an axial second end of the outer cylinder 1 or the inner cylinder 2. In some embodiments, when the tank heat exchanger is used as an evaporator, the working medium inlet can be communicated with the first axial end of the outer cylinder 1 and used for introducing liquid working medium, and the working medium outlet can be communicated with the inner cylinder 2 and used for leading out gaseous working medium; in other embodiments, when the tank heat exchanger is used as a condenser, the working medium inlet may be communicated with the inner cylinder 2 and used for introducing a gaseous working medium, and the working medium outlet may be communicated with the axial second end of the outer cylinder 1 and used for leading out a liquid working medium.

And, the same working medium port can be used as a working medium inlet when the tank heat exchanger is used as an evaporator and as a working medium outlet when the tank heat exchanger is used as a condenser, or vice versa.

The liquid equalizing disc 4 is fixedly arranged relative to the outer cylinder and the inner cylinder, can be directly and fixedly connected with at least one of the outer cylinder and the inner cylinder, and can also be kept relatively fixed with the outer cylinder and the inner cylinder through other components. Similarly, the shielding part 5 is fixedly arranged relative to the outer cylinder and the inner cylinder, and may be directly and fixedly connected with at least one of the outer cylinder and the inner cylinder, or may be kept relatively fixed with the outer cylinder and the inner cylinder by other components.

The structure for passing the fluid on the soaking plate may be a plurality of soaking holes 40 uniformly spaced along the bottom of the pot type heat exchanger at the bottom of the soaking plate 4. Of course, the structure for passing the fluid is not limited to a hole shape, and may be a slit shape or other shapes as long as the liquid working medium can pass through the liquid homogenizing disc to form a plurality of uniform liquid columns or liquid drops.

The gas passages G may be provided radially inside or radially outside the leveling disk 4, or both radially inside and radially outside the leveling disk 4, and accordingly, the number of the shielding portions 5 may be one or two. For a gas channel G formed between the radial inner end of the liquid homogenizing disc 4 and the cylinder wall of the inner cylinder 2, correspondingly, the radial inner end of the shielding main body corresponding to the gas channel G is hermetically connected with the cylinder wall of the inner cylinder 2, and the radial outer end of the shielding main body is spaced from the cylinder wall of the outer cylinder 1; for the gas channel G formed between the radial outer end of the liquid homogenizing disc 4 and the cylinder wall of the outer cylinder 1, correspondingly, the radial inner end of the shielding main body corresponding to the gas channel G forms a gap with the cylinder wall of the inner cylinder 2, and the radial outer end is connected with the cylinder wall of the outer cylinder 1 in a sealing way.

In the tank type heat exchanger of the embodiment of the disclosure, liquid working medium can be led into the tank type heat exchanger by the liquid inlet 10 arranged at the axial first end of the outer cylinder 1, and the inner cylinder can be communicated with the gaseous working medium pipeline so that the gaseous working medium can be led into or led out from the inner cylinder of the tank type heat exchanger, so that the tank type heat exchanger can be used as an evaporator and a condenser.

When the tank type heat exchanger is used as an evaporator, a liquid working medium can flow from a working medium inlet to the first heat exchange tube 31 below the liquid equalizing disc 4 through the liquid equalizing disc 4; in the process that the liquid working medium flows downwards, even if part of working medium liquid drops fly to the cylinder walls of the inner cylinder and the outer cylinder due to bias current or sputtering and the like, the working medium liquid drops can directly flow into the liquid homogenizing disc 4 or be blocked by the shielding part 5 and guided into the liquid homogenizing disc 4 by the shielding part 5, and the effect of recycling the liquid working medium is achieved. And the gaseous state working medium that gets into the pot-type heat exchanger through inlet 10 along with liquid working medium, or the gaseous state working medium that the vaporization formed after the heat exchange tube absorbs heat in the pot-type heat exchanger can be smoothly flowed down through axial interval, gas passage G between shielding part 5 and the equal liquid dish 4 by the space of equal liquid dish 4 and shielding part 5 top. Therefore, through setting up equal liquid dish 4 and shielding part 5 to make and form the space that can supply the gas circulation between the two, can eliminate the pressure rise of gaseous working medium and to the influence of liquid working medium velocity of flow, reduce the average velocity of flow of liquid working medium when the hole or the seam on equal liquid dish 4, thereby play the effect that reduces the pressure drop of working medium in the heat exchanger.

When the tank type heat exchanger is used as a condenser, gaseous working media flow into an annular space formed between the outer cylinder and the inner cylinder from the working medium inlet through the inner cylinder, and then can smoothly flow through the axial interval between the gas channel G and the shielding part, so that the gaseous working media can conveniently flow to the upper parts of the liquid homogenizing disc 4 and the shielding part 5 for condensation and heat exchange; the liquid working medium generated by condensing the gaseous working medium can flow down from the liquid equalizing disc 4 and is stored at the bottom of the tank type heat exchanger.

No matter as evaporimeter or condenser, the pot-type heat exchanger that this disclosed embodiment provided has liquid and gaseous state diphasic working medium in inside and flows under the state, gaseous state working medium wherein can pass through axial interval and gas passage between shielding part and the liquid-distributing disc and flow from top to bottom, and liquid working medium wherein can flow down through the liquid-distributing disc, and gaseous state working medium has independent flow space, consequently can reduce the average velocity of flow of liquid working medium to play the effect that reduces the pressure drop of working medium in the heat exchanger. And the shielding part can play a role in recovering the liquid working medium flowing down on the cylinder wall, and the liquid working medium flowing down on the cylinder wall is guided into the liquid homogenizing disc, so that the waste of the falling film liquid can be reduced, and the heat exchange efficiency is favorably improved.

The two radial ends of the liquid-equalizing disc 4 can be respectively connected with the cylinder walls of the inner cylinder and the outer cylinder, and only an air channel needs to be reserved on the cylinder wall of at least one of the liquid-equalizing disc and the inner cylinder and the outer cylinder. However, in the course of implementing the present disclosure, the inventor found that, since the outer cylinder and the inner cylinder form a sleeve structure at the first end of the tank type heat exchanger, it is very difficult to implement the connection of the liquid-equalizing disc with the cylinder walls of the outer cylinder and the inner cylinder at the same time, which is not favorable for the assembly of the whole tank type heat exchanger.

In some embodiments, as shown in fig. 1, 2 and 7, one of the radially inner end and the radially outer end of the isopipe 4 forms a seal with one of the wall of the outer cylinder 1 and the wall of the inner cylinder 2, and the other of the radially inner end and the radially outer end of the isopipe 4 forms a gas channel G with the other of the wall of the outer cylinder 1 and the wall of the inner cylinder 2.

The pot-type heat exchanger of the embodiment can not only play a role in providing a gaseous working medium channel, reducing working medium pressure drop and recovering liquid working medium, but also can reduce the assembly difficulty of the pot-type heat exchanger, improve the assembly efficiency and reduce the manufacturing cost as the liquid equalizing disc is only connected with one side of the cylinder wall of one of the outer cylinder and the inner cylinder.

Specifically, the gas passage G may be provided between the radially inner side of the soaking plate 4 and the outer wall of the inner cylinder. In some embodiments, as shown in fig. 1 to 3, the radially outer end of the liquid homogenizing disc 4 is connected with the inner wall of the outer cylinder 1 in a sealing manner, and the radially inner end of the liquid homogenizing disc 4 and the outer wall of the inner cylinder 2 form a gas channel G; the radial inner end of the shielding main body is fixedly connected with the outer wall of the inner barrel 2.

In some embodiments, the gas channel G is annular in cross section perpendicular to the axial direction of the can heat exchanger.

In the above embodiment, the gas passage G penetrates through the circumference of the tank heat exchanger, and the flow area of the gaseous working medium is large, and the flow effect is better, so that the effect of reducing the pressure drop of the working medium is better.

Of course, in other embodiments, the gas channel G may be discontinuous along the circumference of the tank heat exchanger, as long as the conditions for circulating the gaseous working medium are satisfied. For example, in a cross section perpendicular to the axial direction of the can heat exchanger, the gas passage G may present several discontinuous fan-shaped rings.

In some embodiments, as shown in FIG. 3, the shielding body is a baffle 51 perpendicular to the axial direction of the can heat exchanger.

According to the above arrangement, the baffle 51 is horizontally arranged in the use state of the can type heat exchanger. In the embodiment shown in fig. 3, the radially inner end of the baffle 51 is fixedly connected to the outer wall of the inner drum 2 and forms a seal.

In some embodiments, as shown in FIG. 4, the shield portion 5 further comprises an edge plate 52, the edge plate 52 being connected to said free end of the shield body and extending towards the axial second end of the can heat exchanger.

According to the arrangement, in the use state of the tank type heat exchanger, the baffle plate 51 is horizontally arranged, and the edge plate 52 can be vertically arranged with the baffle plate 51 or form a certain included angle with the baffle plate 51, and can play a certain flow guiding role. In the embodiment shown in fig. 4, the radially inner end of the baffle plate 51 is fixedly connected and sealed with the outer wall of the inner cylinder 2, the edge plate 52 is connected to the radially outer end of the baffle plate 51 and is arranged perpendicular to the baffle plate 51, and the shielding part 5 is L-shaped as a whole.

In some embodiments, the shielding body is a baffle 51 extending from the connecting end to the free end towards the direction close to the flood pan 4.

According to the arrangement, in the use state of the tank type heat exchanger, the baffle 51 extends from top to bottom and is in sealing connection with the cylinder wall at one end above the baffle, so that a structure similar to an eave shape is formed, accumulated liquid working media on the cylinder wall can flow to the liquid equalizing disc conveniently, and good flow guiding and recycling effects are achieved. In the embodiment shown in FIG. 5,.

In some embodiments, the baffle 51 is a flat or curved plate.

In the embodiment shown in fig. 5, the baffle 51 is a flat plate, the radially inner end of the baffle 51 is fixedly connected with and forms a seal with the outer wall of the inner cylinder 2, and the baffle 51 extends from the radially inner end to the radially outer end in an inclined manner from top to bottom. In some embodiments, which are not shown in the drawings, the baffle 51 may be a curved plate, for example, the baffle 51 may be a curved plate having a circular arc shape or a parabolic shape in cross section along the radial direction of the tank heat exchanger.

In some embodiments, as shown in fig. 6, the tank heat exchanger further includes a plurality of flow guiding portions 6, and the plurality of flow guiding portions 6 are disposed at intervals at an edge of the shielding portion 5 near one side of the soaking pan 4 and extend in a direction near the soaking pan 4.

In the above embodiments, the flow guide portion extends from the edge of the shielding portion close to one side of the homogenization disc to the direction close to the homogenization disc, for example, in the embodiment shown in fig. 6, the flow guide portion 6 may be a columnar structure extending vertically up and down, and in some embodiments not shown, the flow guide portion may also be disposed obliquely. Through setting up a plurality of spaced water conservancy diversion portions that extend to the direction that is close to the liquid-equalizing dish, the liquid working medium of retrieving through the shielding part can flow in the liquid-equalizing dish under the guide of water conservancy diversion portion, plays good water conservancy diversion effect to along the radial of pot-type heat exchanger, can play certain effect of blockking. Therefore, the guide part can prevent the working medium liquid drops at the radial edge of the shielding part from being blown into the gas channel G by the gaseous working medium in the dripping process when the gaseous working medium flows, so that the waste of the liquid working medium can be further reduced.

In some embodiments, the flood pan 4 is a fluted configuration that is concave from an axial first end to an axial second end of the falling film evaporator. Wherein the flow guide 6 extends partially into the groove structure, or an edge of the flow guide 6 near the axial second end of the falling film evaporator and an edge of the groove structure near the axial first end of the falling film evaporator are aligned in the axial direction of the can type heat exchanger.

According to the arrangement, in the use state of the falling film evaporator, the bottom edge of the flow guide part 6 is not higher than the top edge of the side wall of the groove structure, so that the blocking effect of the flow guide part can be further enhanced, and the gaseous working medium is better prevented from blowing working medium liquid drops into the gas channel.

In some embodiments, the inner barrel 2 is a cylindrical or polygonal barrel. Of these, fig. 1 and 2 show a case where the inner cylinder is a cylinder, and fig. 7 shows a case where the inner cylinder is a polygonal cylinder.

The polygonal cylinder may be a quadrangular cylinder, such as a rectangular cylinder or a square cylinder, or may be a pentagonal cylinder, a hexagonal cylinder, an octagonal cylinder, or the like.

In some embodiments, as shown in fig. 1, fig. 2 and fig. 7, the tank heat exchanger further includes a U-shaped tube 7, a plane where a tube center line of the U-shaped tube 7 is located is disposed along a radial direction of the tank heat exchanger, a first end of the U-shaped tube 7 is disposed in the inner tube 2 and is communicated with the inner tube 2, and a second end of the U-shaped tube 7 is used for being connected with a gaseous working medium pipeline to introduce or discharge gaseous working medium.

In order to fit a U-shaped tube with the same radius of the bent section into the inner cylinder, the polygonal inner cylinder requires a smaller area of the axial cross-section than a circular inner cylinder. Therefore, the inner cylinder is set to be the polygonal cylinder, the flow area of the gas channel G is increased, and the pressure drop of the working medium is reduced. The inner cylinder is a polygonal cylinder, so that the pipe diameter of the U-shaped pipe is as large as possible on the premise of not reducing the radius of the bent pipe section, the flow velocity of gas working media is reduced, and the heat exchange performance is improved.

The area of the axial cross section of the U-shaped tube fitted into the polygonal cylinder is smaller than that of the U-shaped tube fitted into the circular cylinder. The flow speed of the gaseous working medium in the gas channel G is reduced.

In some embodiments, as shown in fig. 1, 2 and 7, the working medium inlet includes a liquid inlet 10 disposed at an axial first end of the outer cylinder 1 for introducing the liquid working medium, and the working medium outlet includes a gaseous working medium port 70 communicated with the inner cylinder 2 for leading out the gaseous working medium, and/or the working medium inlet includes a gaseous working medium port 70 communicated with the inner cylinder 2 for leading in the gaseous working medium, and the working medium outlet includes a liquid outlet 13 disposed at an axial second end of the outer cylinder 1 for leading out the liquid working medium.

In the above embodiment, the gaseous working fluid port 70 may be located at the second end of the hairpin tube 7.

The can type heat exchanger may of course include more heat exchange pipes disposed at different positions along the axial direction of the can type heat exchanger based on the first heat exchange pipe 31.

In some embodiments, the can heat exchanger further comprises a second heat exchange tube 32 and/or a third heat exchange tube 9. The second heat exchange tube 32 is coiled in the outer barrel 1 and is positioned on one side of the shielding part 5 far away from the liquid homogenizing disc 4. The third heat exchange tube 9 is coiled in the outer barrel 1 and is positioned on one side of the first heat exchange tube 31 far away from the liquid equalizing disc 4.

In the embodiment shown in fig. 1, 2 and 7, the can type heat exchanger includes a first heat exchange pipe 31, a second heat exchange pipe 32 and a third heat exchange pipe 9, and the can type heat exchanger further includes a liquid distributor 8. Along the axial direction of the falling film evaporator, the liquid distributor 8, the second heat exchange tube 32, the shielding part 5, the liquid equalizing disc 4, the first heat exchange tube 31 and the third heat exchange tube 9 are sequentially arranged from top to bottom. The first heat exchange tube 31 and the second heat exchange tube 32 jointly form a membrane falling area heat exchange tube 3, and the third heat exchange tube 9 forms a liquid full area heat exchange tube.

In the embodiment shown in fig. 1, 2 and 7, when the tank heat exchanger is used as an evaporator, liquid working medium enters the outer cylinder 1 from the liquid inlet 10 and the liquid distributor 8, after heat exchange is performed with the second heat exchange tube 32, gaseous working medium generated by evaporation of the liquid working medium flows to the inner cylinder 2 and the U-shaped tube 7 from the axial interval between the shielding part 5 and the liquid equalizing disc 4 and the gas channel G, is guided out from the gaseous working medium port 70, and the rest of the liquid working medium flows to the first heat exchange tube 31 and the third heat exchange tube 9 through the liquid equalizing disc 4 to perform continuous heat exchange; when this pot-type heat exchanger is used as the condenser, gaseous state working medium is by gaseous state working medium mouth 70, U-shaped pipe 7, inner tube 2 gets into urceolus 1, after outer 1 and third heat exchange tube 9 and the heat transfer of first heat exchange tube 31, the liquid working medium that gaseous state working medium condensation produced stores in the bottom of pot-type heat exchanger, and can derive by liquid outlet 13, all the other gaseous state working mediums are by gas passage G, axial interval between occlusion part 5 and the equal liquid dish 4 flows to the annular region between urceolus 1 and the inner tube 2, continue the heat transfer with second heat exchange tube 32.

In some embodiments, as shown in fig. 1, 2 and 7, the outer cylinder 1 includes a cylinder 11, a first end cover 12 and a second end cover 14, the cylinder 11 is disposed in a splittable manner along a radial direction of the tank heat exchanger, the first end cover 12 is closed at a first axial end of the cylinder 11, the second end cover 14 is closed at a second axial end of the cylinder 11, and the first axial end of the inner cylinder 2 is connected to the first end cover 12.

In the case of the can type heat exchanger having the structure shown in fig. 1, 2 and 7, when the can type heat exchanger is assembled, in order to install the coiled heat exchange tube into the outer tube according to the related art known to the inventor, it is generally required to divide the tube body 11 of the outer tube into two half shells along the section shown in fig. 1, 2 and 7, insert the nozzle of one end of the heat exchange tube into the corresponding opening of one of the half shells, then cover and fixedly connect the other half shell with the former half shell, and finally close and connect the two end covers to the axial ends of the tube body. Therefore, the liquid equalizing disc is difficult to be simultaneously connected with the inner cylinder and the outer cylinder in a sealing way.

Based on the scheme of the embodiment of the present disclosure, the liquid equalizing disc 4 only needs to be connected with the outer cylinder 1 in a sealing manner, and the inner cylinder 2 is not connected with the liquid equalizing disc 4 because of being connected with the first end cover 12, so that the inner cylinder 2 only needs to extend into the cylinder body 11 from top to bottom along with the first end cover 12 during installation, and the installation difficulty of the liquid equalizing disc can be further reduced.

Some embodiments of the present disclosure also provide an air conditioning system including the aforementioned can-type heat exchanger. The air conditioning system provided by the embodiment of the disclosure has the advantages of the tank type heat exchanger.

Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the embodiments of the disclosure or equivalent replacements of parts of the technical features may be made, which are all covered by the technical solution claimed by the disclosure.

Claims

1. The utility model provides a tank type heat exchanger which characterized in that is provided with working medium entry and working medium export, tank type heat exchanger includes:

an outer cylinder (1);

the inner cylinder (2) is communicated with the outer cylinder (1), the outer cylinder (1) is arranged in parallel with the axis of the inner cylinder (2) and forms an annular space with the inner cylinder (2);

the first heat exchange tube (31) is coiled in the outer barrel (1);

a liquid homogenizing disc (4) fixedly arranged in the annular space relative to the outer cylinder (1) and the inner cylinder (2) and located on one side of the first heat exchange tube (31) close to the axial first end of the tank type heat exchanger, wherein the radial outer end of the liquid homogenizing disc (4) and the cylinder wall of the outer cylinder (1) form a gas channel (G), and/or the radial inner end of the liquid homogenizing disc (4) and the cylinder wall of the inner cylinder (2) form a gas channel (G); and

the shielding part (5) is fixedly arranged in the annular space and forms an axial interval with the liquid equalizing disc (4) relative to the outer cylinder (1) and the inner cylinder (2), the shielding part (5) comprises a shielding main body corresponding to the gas channel (G), the shielding main body is positioned at one side, facing the liquid equalizing disc (4), of the axial first end of the tank-type heat exchanger and extends along the radial direction of the tank-type heat exchanger, the shielding main body completely covers the corresponding gas channel (G), one of the radial inner end and the radial outer end of the shielding main body is a connecting end, the other end of the shielding main body is a free end, the connecting end is in sealing connection with the cylinder wall of the inner cylinder (2) and one of the cylinder walls of the outer cylinder (1), and the free end of the inner cylinder (2) and the other cylinder wall of the outer cylinder (1) form an interval.

2. The tank heat exchanger according to claim 1, characterized in that one of the radially inner end and the radially outer end of the flood pan (4) forms a seal with one of the wall of the outer drum (1) and the wall of the inner drum (2), and the other of the radially inner end and the radially outer end of the flood pan (4) forms the gas channel (G) with the other of the wall of the outer drum (1) and the wall of the inner drum (2).

3. The can heat exchanger of claim 2,

the radial outer end of the liquid homogenizing disc (4) is connected with the inner wall of the outer cylinder (1) in a sealing mode, and the radial inner end of the liquid homogenizing disc (4) and the outer wall of the inner cylinder (2) form the gas channel (G);

the radial inner end of the shielding main body is fixedly connected with the outer wall of the inner barrel (2).

4. Tank heat exchanger according to claim 1, characterized in that the gas channel (G) is annular in cross section perpendicular to the axial direction of the tank heat exchanger.

5. Tank heat exchanger according to claim 1, characterized in that the shielding body is a baffle (51) perpendicular to the axial direction of the tank heat exchanger.

6. Tank heat exchanger according to claim 5, characterized in that the shielding (5) further comprises an edge plate (52), which edge plate (52) is connected to the free end of the shielding body and extends towards an axial second end of the tank heat exchanger.

7. Tank heat exchanger according to claim 1, characterized in that the shielding body is a baffle (51) extending from the connection end to the free end towards the direction close to the flood pan (4).

8. Tank heat exchanger according to claim 7, characterized in that the baffle (51) is a flat or curved plate.

9. The tank heat exchanger according to any one of claims 1 to 8, further comprising a plurality of flow guide portions (6), the plurality of flow guide portions (6) being provided at intervals at an edge of one side of the shielding portion (5) adjacent to the flood pan (4) and extending in a direction adjacent to the flood pan (4).

10. The tank heat exchanger according to claim 9,

the liquid equalizing disc (5) is of a groove structure which is recessed from the first axial end to the second axial end of the tank type heat exchanger;

wherein the flow guide (6) extends partially into the groove structure or wherein an edge of the flow guide (6) near the axial second end of the falling film evaporator is aligned with an edge of the groove structure near the axial first end of the falling film evaporator in the axial direction of the can heat exchanger.

11. The tank heat exchanger according to any one of claims 1 to 8, characterized in that the inner cylinder (4) is a cylindrical or polygonal cylinder.

12. The tank heat exchanger according to claim 11, further comprising a U-shaped pipe (7), wherein a plane of a pipe center line of the U-shaped pipe (7) is arranged along a radial direction of the tank heat exchanger, a first end of the U-shaped pipe (7) is arranged in the inner cylinder (2) and communicated with the inner cylinder (2), and a second end of the U-shaped pipe (7) is used for being connected with a gaseous working medium pipeline to lead in or lead out gaseous working medium.

13. The tank heat exchanger according to any one of claims 1 to 8,

the working medium inlet comprises a liquid inlet (10) which is arranged at the first axial end of the outer cylinder (1) and is used for leading in liquid working medium, and the working medium outlet comprises a gaseous working medium port (70) which is communicated with the inner cylinder (2) and is used for leading out gaseous working medium; and/or

The working medium inlet comprises a gaseous working medium port (70) communicated with the inner cylinder (2) and used for leading gaseous working medium in, and the working medium outlet comprises a liquid outlet (13) arranged at the axial second end of the outer cylinder (1) and used for leading out liquid working medium.

14. The tank heat exchanger according to any one of claims 1 to 8, further comprising:

the second heat exchange tube (32) is coiled in the outer barrel (1) and is positioned on one side, far away from the liquid homogenizing disc (4), of the shielding part (5); and/or

And the third heat exchange tube (9) is coiled in the outer barrel (1) and is positioned on one side, far away from the liquid-homogenizing disc (4), of the first heat exchange tube (31).

15. The tank heat exchanger according to any one of claims 1 to 8, characterized in that the outer cylinder (1) comprises a cylinder (11), a first end cap (12) and a second end cap (14), the cylinder (11) being arranged splittable in the radial direction of the tank heat exchanger, the first end cap (12) being closed at an axial first end of the cylinder (11), the second end cap (14) being closed at an axial second end of the cylinder (11), the axial first end of the inner cylinder (2) being connected to the first end cap (12).

16. An air conditioning system comprising the tank heat exchanger according to any one of claims 1 to 15.