CN219976801U - Heat exchanger - Google Patents

Abstract

A heat exchanger relates to the field of heat exchange devices. The heat exchanger comprises a shell and end covers connected with two ends of the shell respectively, at least two heat exchange cavities which are sequentially arranged along the width direction of the shell and are mutually isolated are arranged in the shell, one end cover is respectively provided with a circulation cavity which corresponds to each heat exchange cavity one by one and is mutually isolated, and a refrigerating medium inlet and outlet pipe which is respectively communicated with each circulation cavity, the other end cover is internally provided with a communication cavity, each heat exchange cavity is internally provided with a plurality of heat exchange pipes, two ends of each heat exchange pipe are respectively communicated with the corresponding circulation cavity and the communication cavity, and the top and the bottom of each heat exchange cavity are respectively communicated with at least one upper inlet and outlet pipe and at least one lower inlet and outlet pipe. The heat exchanger provided by the utility model performs heat exchange operation by separating and forming independent heat exchangers in the shell, and has the advantages of simple and compact structure, small occupied space and low installation and manufacturing cost.

Description

Heat exchanger

Technical Field

The utility model relates to the field of heat exchange devices, in particular to a heat exchanger.

Background

At present, most heat exchangers with serial countercurrent function are of a three-tube plate structure or a transfer tube box is added between two containers to realize complete independence of left and right refrigerant sides.

The heat exchanger with the series countercurrent function in the prior art is long in length, occupies large space of a machine room, causes high investment cost in construction of the machine room, is complex in external water system of a unit, is inconvenient to arrange and take over pipes of the water system, and meanwhile, requires long time for machining and manufacturing the middle tube plate of the three-tube plate structure and expansion connection of the heat exchange tubes, and is high in machining cost.

There is a need for a heat exchanger that is simple and compact in construction, occupies little space, and is inexpensive to install and manufacture.

Disclosure of Invention

The utility model aims to provide a heat exchanger, which performs heat exchange operation respectively by dividing and forming a plurality of independent heat exchangers in a shell, and has the advantages of simple and compact structure, small occupied space and low installation and manufacturing cost.

The utility model is realized in the following way:

the utility model provides a heat exchanger, which comprises a shell and end covers respectively connected with two ends of the shell, wherein at least two heat exchange cavities which are sequentially arranged along the width direction of the shell and are mutually isolated are arranged in the shell, one end cover is respectively provided with a circulation cavity which corresponds to each heat exchange cavity one by one and is mutually isolated, and a refrigerating medium inlet and outlet pipe which is respectively communicated with each circulation cavity, the other end cover is internally provided with a communication cavity, each heat exchange cavity is internally provided with a plurality of heat exchange pipes, two ends of each heat exchange pipe are respectively communicated with the corresponding circulation cavity and the communication cavity, and the top and the bottom of each heat exchange cavity are respectively communicated with at least one upper inlet and outlet pipe and at least one lower inlet and outlet pipe.

In some alternative embodiments, at least one partition plate group is arranged in the shell, the at least one partition plate group divides the interior of the shell into at least two heat exchange cavities which are sequentially arranged along the width direction of the shell and are mutually isolated, and the vacuumizing heat insulation cavity is arranged in the partition plate group.

In some alternative embodiments, the top of at least one heat exchange cavity is provided with a gas distributor, and the gas distributor is used for dispersing the gaseous refrigerant entering through the corresponding upper inlet and outlet pipes and blowing the gaseous refrigerant through the corresponding heat exchange pipes or uniformly sucking the gaseous refrigerant into the upper inlet and outlet pipes after the flow rate of the gaseous refrigerant is reduced.

In some alternative embodiments, the gas distributor is a gas dispersion plate provided with a plurality of through holes.

In some alternative embodiments, at least one gas-liquid separation screen is disposed within each heat exchange chamber between the gas distributor and the corresponding heat exchange tube.

In some alternative embodiments, the bottom of each heat exchange cavity is provided with a supercooling partition plate, the supercooling partition plates are separated at the bottoms of the heat exchange cavities to form supercooling cavities communicated with the corresponding lower inlet and outlet pipes, a plurality of heat exchange pipes are arranged in the supercooling cavities, and the supercooling partition plates are provided with a plurality of refrigerant flow ports.

In some alternative embodiments, at least one set of fixed plates is provided in each heat exchange chamber, and the heat exchange tubes pass through the corresponding set of fixed plates.

In some alternative embodiments, the bottom of at least one heat exchange chamber is provided with a liquid distributor below each corresponding heat exchange tube, the liquid distributor being configured to disperse liquid refrigerant entering through the corresponding lower inlet and outlet tube and then flow through each corresponding heat exchange tube.

In some alternative embodiments, the liquid distributor is a liquid distributor plate provided with a plurality of liquid-homogenizing holes.

In some alternative embodiments, a plurality of partition baffles are arranged in each heat exchange cavity, and a plurality of heat exchange tubes are arranged between two adjacent partition baffles.

The beneficial effects of the utility model are as follows: according to the heat exchanger provided by the utility model, the independent heat exchange cavities and the heat exchange tubes are arranged in the shell of the heat exchanger, the top and the bottom of each heat exchange cavity are respectively communicated with at least one upper inlet and outlet tube and at least one lower inlet and outlet tube to form a shell pass, the end cover at one end of the shell is respectively provided with the circulation cavity communicated with the heat exchange tubes in each heat exchange cavity, and the end cover at the other end of the shell is provided with the communication cavity communicated with each heat exchange tube to form a tube pass, so that a plurality of independent heat exchangers are formed in the shell of the heat exchanger for heat exchange operation, and the heat exchanger has the advantages of simple and compact structure, small occupied space and low installation and manufacturing cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a first view angle of a heat exchanger according to embodiment 1 of the present utility model;

fig. 2 is a schematic structural diagram of a second view angle of the heat exchanger according to embodiment 1 of the present utility model;

FIG. 3 is a cross-sectional view taken along section line A-A of FIG. 1;

FIG. 4a is a cross-sectional view taken along section line B-B in FIG. 1 of a heat exchanger according to example 1 of the present utility model in use as a condenser;

FIG. 4B is a cross-sectional view taken along section line B-B in FIG. 1 of a heat exchanger according to embodiment 1 of the present utility model in use as an evaporator;

fig. 5 is a schematic cross-sectional view of a heat exchanger according to embodiment 2 of the present utility model;

fig. 6 is a schematic structural diagram of a gas dispersion plate in a heat exchanger according to embodiment 2 of the present utility model;

fig. 7 is a schematic perspective view of a supercooling partition plate in a heat exchanger according to embodiment 2 of the present utility model;

fig. 8 is a schematic cross-sectional view of a heat exchanger according to embodiment 3 of the present utility model;

fig. 9 is a schematic view of a local connection structure of a fixing plate set, a partition baffle and a heat exchange tube in the heat exchanger according to embodiment 3 of the present utility model;

fig. 10 is a schematic cross-sectional view of a heat exchanger according to embodiment 4 of the present utility model;

fig. 11 is a schematic structural view of a liquid dispersion plate in a heat exchanger according to embodiment 4 of the present utility model.

In the figure: 100. a housing; 110. an end cap; 120. a tube sheet; 130. a heat exchange cavity; 140. a flow-through chamber; 150. a coolant inlet and outlet pipe; 160. a communication chamber; 170. a heat exchange tube; 180. an upper inlet/outlet pipe; 190. a lower inlet and outlet pipe; 200. a partition plate group; 210. a heat insulating chamber; 220. a gas dispersion plate; 221. a through hole; 230. supercooling partition plates; 231. a supercooling base plate; 232. a supercooling top plate; 240. a supercooling chamber; 250. a refrigerant flow port; 260. a fixed plate group; 270. partition baffles; 280. a gas-liquid separation filter screen; 290. a liquid dispersion plate; 300. and (5) liquid homogenizing holes.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the product of the application, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The features and performance of the heat exchanger of the present utility model are described in further detail below in conjunction with the examples.

The numbers of the heat exchange chambers 130, the coolant inlet and outlet pipes 150, the heat exchange pipes 170, the upper inlet and outlet pipes 180, the lower inlet and outlet pipes 190, the partition plate group 200, the through holes 221, the refrigerant flow ports 250, the fixed plate group 260, the partition baffles 270 and the liquid equalizing holes 300 in the embodiments of the present utility model can be adjusted according to actual demands, and are not limited by the numbers in the following embodiments.

Example 1

As shown in fig. 1, 2 and 3, the present utility model provides a heat exchanger, which comprises a hollow shell 100 with two ends closed by tube plates 120 and end covers 110 respectively connected with the two ends of the shell 100, wherein a vertically arranged partition plate group 200 is arranged in the shell 100, the partition plate group 200 divides the interior of the shell 100 into two heat exchange cavities 130 which are sequentially arranged along the width direction of the shell 100 and are mutually isolated, and a vacuumized heat insulation cavity 210 is arranged in the partition plate group 200; two mutually isolated circulation cavities 140 which are in one-to-one correspondence with the heat exchange cavities 130 are arranged in one end cover 110, the end cover 110 is connected with two secondary refrigerant inlet and outlet pipes 150, the two secondary refrigerant inlet and outlet pipes 150 are respectively communicated with the two circulation cavities 140, a communication cavity 160 is arranged in the other end cover 110, each heat exchange cavity 130 is internally provided with heat exchange pipes 170 which are arranged at intervals, two ends of each heat exchange pipe 170 are respectively communicated with the corresponding circulation cavity 140 and the communication cavity 160, and the top and the bottom of each heat exchange cavity 130 are respectively communicated with an upper inlet and outlet pipe 180 and a lower inlet and outlet pipe 190; each heat exchange chamber 130 is provided therein with a plurality of fixing plate groups 260 arranged at intervals along the length direction thereof, and the heat exchange tubes 170 in the heat exchange chamber 130 pass through the corresponding respective fixing plate groups 260.

The embodiment of the utility model provides a heat exchanger which can be used as an evaporator or a condenser, as shown in fig. 4a, and the working principle of the heat exchanger when the heat exchanger is used as a condenser is as follows: gaseous refrigerant is respectively introduced into the two heat exchange cavities 130 through the two upper inlet and outlet pipes 180, the gaseous refrigerant is condensed to form liquid refrigerant to flow down after being blown through the heat exchange pipes 170 in the two heat exchange cavities 130, the liquid refrigerant is respectively discharged through the lower inlet and outlet pipes 190 at the bottoms of the two heat exchange cavities 130, meanwhile, the refrigerating medium is introduced into the corresponding circulation cavity 140 of the end cover 110 from the refrigerating medium inlet and outlet pipe 150, the refrigerating medium in the circulation cavity 140 flows into the communication cavity 160 in the other end cover 110 after being subjected to heat exchange with the gaseous refrigerant through the heat exchange pipes 170 in the corresponding heat exchange cavities 130, then the refrigerating medium in the communication cavity 160 flows into the other corresponding circulation cavity 140 of the end cover 110 after being subjected to heat exchange with the gaseous refrigerant through the heat exchange pipes 170 in the other heat exchange cavity 130, and flows out through the other refrigerating medium inlet and outlet pipe 150 to complete the heat exchange process.

As shown in fig. 4b, the working principle when it is used as an evaporator is: liquid refrigerant is respectively introduced into the two heat exchange cavities 130 through the two lower inlet and outlet pipes 190, the liquid refrigerant is evaporated to form gaseous refrigerant after contacting the heat exchange pipes 170 in the two heat exchange cavities 130 to rise, and is discharged through the upper inlet and outlet pipes 180 at the top of the two heat exchange cavities 130, meanwhile, the refrigerating medium is introduced into the corresponding circulation cavity 140 of the end cover 110 from one refrigerating medium inlet and outlet pipe 150, the refrigerating medium in the circulation cavity 140 flows into the communication cavity 160 in the other end cover 110 after passing through each heat exchange pipe 170 in the corresponding heat exchange cavity 130 to exchange heat with the liquid refrigerant, and then the refrigerating medium in the communication cavity 160 flows into the other corresponding circulation cavity 140 of the end cover 110 after passing through each heat exchange pipe 170 in the other heat exchange cavity 130 to exchange heat with the liquid refrigerant, and flows out through the other refrigerating medium inlet and outlet pipe 150 to complete the heat exchange process.

The heat exchanger provided by the embodiment of the utility model is characterized in that two independent heat exchange cavities 130 are arranged in a shell 100, replacement heat pipes 170 are respectively arranged in the heat exchange cavities 130, an upper inlet pipe 180 and a lower inlet pipe 190 are respectively communicated with the top and the bottom of each heat exchange cavity 130 to form a shell pass, a circulation cavity 140 which is respectively arranged in an end cover 110 at one end of the shell 100 and is communicated with the heat exchange pipes 170 in the two heat exchange cavities 130, and a communication cavity 160 which is respectively arranged in an end cover 110 at the other end of the shell 100 and is respectively communicated with each heat exchange pipe 170 to form a tube pass, so that two independent and serial heat exchangers are respectively formed in the shell 100 to perform heat exchange operation.

The heat insulation cavity 210 for vacuumizing is arranged in the separation plate set 200, heat can be effectively prevented from being exchanged between the two heat exchange cavities 130 through the separation plate set 200 by using the heat insulation cavity 210, and the independence of heat exchange operation between the two heat exchange cavities 130 is ensured, so that the independent operation of the two heat exchangers is ensured.

In addition, each heat exchange cavity 130 is internally provided with fixed plate groups 260 which are arranged at intervals along the length direction, and the heat exchange tubes 170 in the heat exchange cavities 130 pass through the corresponding fixed plate groups 260, so that the heat exchange operation of the heat exchange tubes 170 in the heat exchange cavities 130 can be ensured to be stable.

In other alternative embodiments, one, two, three, four, five or more spaced apart fixed plate sets 260 may also be disposed within the heat exchange chamber 130.

In other alternative embodiments, the partition plate group 200 may further partition the interior of the housing 100 into more than two heat exchange chambers 130 sequentially arranged in the width direction of the housing 100 and isolated from each other.

In other alternative embodiments, the number of upper inlet and outlet pipes 180 and lower inlet and outlet pipes 190 connected at the top and bottom of the heat exchange chamber 130 may be two or more.

Example 2

As shown in fig. 5, 6 and 7, the present utility model provides a heat exchanger having a structure substantially the same as that of the heat exchanger provided in embodiment 1, except that in this embodiment, a gas distributor is provided at the top of the heat exchange chamber 130, the gas distributor is used to disperse the gaseous refrigerant entering through the corresponding upper inlet and outlet pipe 180 and blow the gaseous refrigerant through the corresponding heat pipes 170, the gas distributor is a gas dispersing plate 220, and through holes 221 are formed in the gas dispersing plate 220 at intervals. The bottom of each heat exchange cavity 130 is provided with a supercooling partition plate 230, the supercooling partition plate 230 in this embodiment is formed by connecting an arc-shaped supercooling bottom plate 231 and a supercooling top plate 232 with an inverted-L-shaped cross section, the supercooling partition plates 230 are separated at the bottom of the heat exchange cavity 130 to form a supercooling cavity 240 communicated with a corresponding lower inlet and outlet pipe 190, heat exchange pipes 170 are arranged in the supercooling cavity 240 at intervals, the supercooling top plate 232 is provided with refrigerant flow ports 250 at intervals, and the supercooling bottom plate 231 is communicated with the lower inlet and outlet pipe 190.

The top of the heat exchange cavity 130 is provided with the gas dispersion plate 220, when the gaseous refrigerant is introduced into the heat exchange cavity 130 through the upper inlet and outlet pipe 180 and then blocked by the gas dispersion plate 220, the gaseous refrigerant is dispersed through the through holes 221 on the gas dispersion plate 220 and then blown through each heat exchange tube 170 below the gas dispersion plate 220 to exchange heat and condense to form liquid refrigerant, so that the gaseous refrigerant is buffered and dispersed by the gas dispersion plate 220, the gaseous refrigerant is ensured to stably blow through each heat exchange tube 170 to perform full heat exchange operation, and high-speed airflow is prevented from impacting the heat exchange tube 170.

In this embodiment, the bottom of each heat exchange cavity 130 is provided with a supercooling partition plate 230, the supercooling partition plate 230 is separated at the bottom of the heat exchange cavity 130 to form a supercooling cavity 240 communicated with the corresponding lower inlet and outlet pipe 190, and a heat exchange pipe 170 is arranged in the supercooling cavity 240 for supercooling heat exchange operation, so that the supercooling effect on the liquid refrigerant in the heat exchange process can be enhanced by further using the supercooling cavity 240 to perform supercooling treatment on the liquid refrigerant flowing down from the refrigerant flow port 250 and then discharging the liquid refrigerant from the lower inlet and outlet pipe 190.

Example 3

As shown in fig. 8 and 9, the present utility model provides a heat exchanger which has substantially the same structure as the heat exchanger provided in embodiment 2, except that in this embodiment, partition baffles 270 are disposed in each heat exchange chamber 130 at intervals and in parallel, the partition baffles 270 are disposed above the supercooling partition baffles 230, the heat exchange tubes 170 are disposed on both sides of each partition baffle 270, respectively, each partition baffle 270 passes through each fixed plate group 260, and the partition baffles 270 are disposed at an angle of 60 degrees with respect to the horizontal plane.

The heat exchanger provided by the embodiment of the utility model can divide the heat exchange cavity 130 into a plurality of heat exchange areas which are sequentially arranged from top to bottom by arranging the partition baffle 270 in the heat exchange cavity 130, wherein the partition baffle 270 is inclined at an angle of 60 degrees relative to the horizontal plane, and each heat exchange area is used for independently carrying out heat exchange operation, so that the heat transfer operation of each heat exchange area is effectively optimized, and the heat exchange and heat transfer efficiency between the gaseous refrigerant and the liquid refrigerant flowing through each heat exchange area and the heat exchange tube 170 is improved.

In other alternative embodiments, the zoned baffle 270 may be inclined at an angle of between 0 and 90 degrees relative to horizontal.

In other alternative embodiments, the partition baffles 270 may also be arranged non-parallel to each other, and each partition baffle 270 may be arranged at an angle of 0-90 degrees with respect to the horizontal. In other alternative embodiments, some of the partition baffles 270 may be arranged in parallel and the remaining partition baffles 270 may be arranged in non-parallel.

Example 4

As shown in fig. 10 and 11, the present utility model provides a heat exchanger, which has substantially the same structure as the heat exchanger provided in embodiment 1, except that in this embodiment, a gas distributor is disposed at the top of the heat exchange cavity 130, the gas distributor is used for reducing the flow rate of the gas below the heat exchange cavity and reducing the flow rate of the gas above the liquid level by 60mm to within 1m/s, so as to avoid the liquid carried by the air suction of the compressor, the gas distributor is a gas dispersing plate 220, and through holes 221 are formed on the gas dispersing plate 220 at intervals; the middle part of each heat exchange cavity 130 is provided with a gas-liquid separation filter screen 280 positioned between the gas distributor and each corresponding heat exchange tube 170, the bottom of each heat exchange cavity 130 is provided with a liquid distributor positioned below each corresponding heat exchange tube 170, the liquid distributor is used for dispersing the liquid refrigerant entering through the corresponding lower inlet and outlet tube 190 and then flowing through each corresponding heat exchange tube 170, the liquid distributor is a liquid dispersing plate 290, and the liquid dispersing plate 290 is provided with liquid homogenizing holes 300 which are arranged at intervals.

According to the heat exchanger provided by the embodiment of the utility model, the liquid distributor positioned below each corresponding heat exchange tube 170 is arranged at the bottom of the heat exchange cavity 130, so that the liquid refrigerant entering through the lower inlet and outlet tube 190 can uniformly flow through each corresponding heat exchange tube 170 after being dispersed through each liquid equalizing hole 300 after impacting the liquid dispersing plate 290 of the liquid distributor, thereby optimizing the heat exchange contact area between the liquid refrigerant and each heat exchange tube 170 and effectively improving the heat exchange efficiency.

In addition, a gas-liquid separation filter 280 is disposed in the middle of each heat exchange cavity 130 and is located between the gas distributor and each corresponding heat exchange tube 170, when the liquid refrigerant contacts the heat exchange tube 170, the gaseous refrigerant formed by evaporation rises to form a gas-liquid mixed state refrigerant, the liquid refrigerant in the gas-liquid mixed state refrigerant is blocked and separated by the gas-liquid separation filter 280, so that the gaseous refrigerant is discharged from the upper inlet and outlet tube 180 after rising independently, and the influence of the suction of the compressor on the work is prevented.

The embodiments described above are some, but not all embodiments of the utility model. The detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Claims (10)

1. The utility model provides a heat exchanger, its characterized in that, it includes the casing and respectively with the end cover that the casing both ends are connected, be equipped with at least two edges in the casing the heat transfer chamber that the casing width direction arranged in proper order and keep apart each other, one the end cover be equipped with respectively with each the circulation chamber one-to-one and keep apart each other and respectively with each the secondary refrigerant business turn over pipe of circulation chamber intercommunication is equipped with the intercommunication chamber in the end cover, every all be equipped with many heat transfer pipes in the heat transfer chamber, the both ends of heat transfer pipe respectively with correspond the circulation chamber with the intercommunication chamber intercommunication, every the top and the bottom in heat transfer chamber communicate respectively has at least one upper portion business turn over pipe and at least one lower part business turn over pipe.

2. The heat exchanger according to claim 1, wherein at least one partition plate group is provided in the housing, at least one partition plate group partitions the housing into at least two heat exchange chambers which are sequentially arranged in the width direction of the housing and are isolated from each other, and a vacuum-pumping heat insulation chamber is provided in the partition plate group.

3. The heat exchanger according to claim 1, wherein a gas distributor is provided at a top of at least one of the heat exchange chambers, and the gas distributor is configured to disperse the gaseous refrigerant entering through the upper inlet/outlet pipe and blow the gaseous refrigerant through the respective heat exchange pipe or uniformly suck the gaseous refrigerant into the upper inlet/outlet pipe after a flow rate of the gaseous refrigerant is reduced.

4. A heat exchanger according to claim 3, wherein the gas distributor is a gas distributor plate provided with a plurality of through holes.

5. A heat exchanger according to claim 3, wherein each heat exchange chamber is provided with at least one gas-liquid separation screen located between the gas distributor and the corresponding heat exchange tube.

6. The heat exchanger of claim 1, wherein a supercooling partition plate is arranged at the bottom of each heat exchange cavity, the supercooling partition plates are partitioned at the bottoms of the heat exchange cavities to form supercooling cavities communicated with the corresponding lower inlet and outlet pipes, a plurality of heat exchange pipes are arranged in the supercooling cavities, and a plurality of refrigerant flow ports are formed in the supercooling partition plates.

7. The heat exchanger of claim 1, wherein at least one set of fixed plates is disposed within each heat exchange chamber, the heat exchange tubes passing through the corresponding set of fixed plates.

8. The heat exchanger of claim 1, wherein a bottom of at least one of the heat exchange chambers is provided with a liquid distributor below each of the corresponding heat exchange tubes, the liquid distributor being configured to disperse liquid refrigerant entering the corresponding lower inlet and outlet tube and then flow through each of the corresponding heat exchange tubes.

9. The heat exchanger of claim 8, wherein the liquid distributor is a liquid distributor plate provided with a plurality of liquid equalization holes.

10. The heat exchanger of claim 1, wherein a plurality of partition baffles are disposed in each heat exchange chamber, and a plurality of heat exchange tubes are disposed between two adjacent partition baffles.