An integrated tube heat exchanger

Abstract

The present invention relates to the technical field of heat exchange devices, and discloses an integrated tube heat exchanger, which includes a water inlet pipe, a water outlet pipe, and at least two groups of heat exchange sleeve assemblies. The water inlet pipe is provided with a water inlet, and along its axial direction, a water inlet adjustment position is provided which is far from the water inlet level and the inner diameter of the pipe gradually decreases to form a water inlet cavity. The water outlet pipe is provided with a water outlet, and along its axial direction, a water outlet adjustment position is provided which is far from the water outlet level and the inner diameter of the pipe gradually decreases to form a water outlet cavity. Each heat exchange sleeve assembly is connected in parallel between the water inlet pipe and the water outlet pipe. The water inlet level communicates with the water outlet adjustment position, and the water inlet adjustment position communicates with the water outlet level, ensuring that the water flow velocities at various positions in the flowing direction of the water inlet cavity and the water outlet cavity are uniform, evenly distributing the water flow rate. At the same time, it also makes the path of the heat exchange water from the water inlet to the water outlet equal, greatly reducing the water resistance. The uniform heat exchange effect is achieved through the uniform distribution of the water path and the reduction of the water resistance, improving the overall heat exchange efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange devices, in particular to an integrated tube heat exchanger. Background Art

[0002] Integrated tube heat exchanger is an indispensable device in the field of refrigeration. It is a device that uses the temperature difference of convection media in different channels to perform heat exchange under the same body structure.

[0003] Traditional shell and tube integrated tube heat exchangers use two standard tubes of different sizes to connect into concentric shell and tube. Two different media flow between the inner tube and the outer tube and the inner tube to achieve the effect of heat exchange. Small-capacity shell and tube integrated tube heat exchangers have the advantages of small footprint, high heat transfer coefficient, simple structure and easy production, and are widely used.

[0004] However, when the capacity of the shell and tube integrated tube heat exchanger is large (for example, greater than 20kw), the corresponding pipeline is very long, and the problem of large footprint and large water resistance is very obvious, affecting the overall heat exchange efficiency. The existing improvement scheme is to connect multiple shell and tube heat exchange units in series or in parallel, but it is impossible to evenly distribute the flow medium to each shell and tube heat exchange unit, resulting in uneven heat exchange effect of each shell and tube heat exchange unit, and still has the disadvantages of large water resistance, low heat exchange efficiency, and short service life. Summary of the invention

[0005] The technical problem to be solved by the present invention is: how to evenly distribute water flow to multiple groups of heat exchange sleeve components, thereby reducing water resistance and improving heat exchange efficiency.

[0006] In order to solve the above technical problems, the present invention provides an integrated tube heat exchanger, comprising:

[0007] A water inlet pipe, wherein the water inlet position of the water inlet pipe is provided with a water inlet, and the water inlet pipe is provided with a water inlet adjustment position away from the water inlet position and with a gradually decreasing inner diameter along its axial direction, and the water inlet position leads to the water inlet adjustment position to define a water inlet cavity for conveying hot water to be exchanged,

[0008] A water outlet pipe, wherein the water outlet position of the water outlet pipe is provided with a water outlet, and the water outlet pipe is provided with a water outlet adjustment position away from the water outlet position and with a gradually decreasing inner diameter along its axial direction, and the water outlet adjustment position leads to the water outlet position to define a water outlet cavity for outputting the exchanged hot water,

[0009] At least two groups of heat exchange sleeve assemblies, each of the heat exchange sleeve assemblies is connected in parallel between the water inlet pipe and the water outlet pipe, the water inlet position is connected to the water outlet adjustment position, and the water inlet adjustment position is connected to the water outlet position.

[0010] As a preferred embodiment, the water inlet level is set at one end of the water inlet pipe, the water inlet adjustment level is set at the other end of the water inlet pipe, the water outlet level is set at one end of the water outlet pipe, and the water outlet adjustment level is set at the other end of the water outlet pipe.

[0011] As a preferred solution, the water inlet chamber and the water outlet chamber are both graded.

[0012] As a preferred embodiment, the water inlet chamber includes a plurality of stepped first cavities, the inner diameter of the tube of the first cavity decreases step by step in the direction away from the water inlet position, and the water outlet chamber includes a plurality of stepped second cavities, the inner diameter of the tube of the second cavity decreases step by step in the direction away from the water outlet position, and each stage of the first cavity is connected to each stage of the second cavity in a one-to-one correspondence.

[0013] As a preferred solution, the heat exchange sleeve assembly is provided between the first cavity and the corresponding second cavity of each stage.

[0014] As a preferred solution, a first filling block for changing the inner diameter of the tube is disposed in the first cavity, and a second filling block for changing the inner diameter of the tube is disposed in the second cavity.

[0015] As a preferred solution, the first filling block and the second filling block are both circular tubes with two ends connected, the outer wall of each first filling block abuts against the inner wall of the water inlet pipe, and the outer wall of each second filling block abuts against the inner wall of the water outlet pipe.

[0016] As a preferred solution, both the first filling block and the second filling block are provided with through holes communicating with the heat exchange sleeve assembly.

[0017] As a preferred solution, the water flow rates of the heat exchange sleeve assemblies are equal.

[0018] As a preferred solution, it also includes:

[0019] A refrigerant inlet pipe is provided with a refrigerant inlet, and the refrigerant inlet pipe is provided with a plurality of first branch pipes along its axial direction, and the first branch pipe is communicated with the heat exchange sleeve assembly at one end close to the water outlet pipe,

[0020] A refrigerant outlet pipe is provided with a refrigerant outlet, and a plurality of second branch pipes are provided along the axial direction of the refrigerant outlet pipe. The second branch pipes are connected to the heat exchange sleeve assembly at one end close to the water inlet pipe.

[0021] As a preferred solution, the first branch pipe is provided with a regulating pipe for regulating the flow of the refrigerant.

[0022] As a preferred solution, the inner diameter of the regulating tube close to the refrigerant inlet is smaller than the inner diameter of the regulating tube far from the refrigerant inlet.

[0023] As a preferred solution, the inner diameter of the regulating tube is 1 mm to 5 mm.

[0024] As a preferred solution, the length of the regulating tube close to the refrigerant inlet is greater than the length of the regulating tube far from the refrigerant inlet.

[0025] As a preferred solution, the length of the adjusting tube is 10 mm to 100 mm.

[0026] Compared with the prior art, the integrated tube heat exchanger provided by the present invention has the following beneficial effects:

[0027] The water inlet pipe in the present invention is provided with the water inlet adjusting position with a gradually reduced inner diameter, thereby ensuring that the water flow rate at each position of the water inlet chamber in the flow direction is uniform, avoiding the problem of too little water distribution at the position far away from the water inlet position, and the water inlet adjusting position with a gradually reduced inner diameter is provided on the water outlet pipe, the water inlet position can be communicated with the water outlet adjusting position through one group of the heat exchange sleeve assemblies, and the water inlet adjusting position can be communicated with the water outlet position through another group of the heat exchange sleeve assemblies, ensuring that the water flow rate of the water outlet chamber is uniform, and at the same time, the distance of the hot water exchanged by each heat exchange sleeve assembly from the water inlet to the water outlet is equal, which greatly reduces the water resistance, and realizes uniform heat exchange effect by uniformly distributing the water path and reducing the water resistance, thereby improving the overall heat exchange efficiency, and has the advantages of low production cost and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the internal structure of an integrated tube heat exchanger according to a preferred embodiment of the present invention.

[0029] Figure 2 It is a schematic diagram of the overall structure of an integrated tube heat exchanger according to a preferred embodiment of the present invention.

[0030] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0031] Figure 4 It is a schematic diagram of the flow direction of hot water in the integrated tubular heat exchanger of the preferred embodiment of the present invention.

[0032] Figure 5 It is a schematic diagram of the flow direction of the refrigerant medium in the integrated tubular heat exchanger of the preferred embodiment of the present invention.

[0033] In the figure:

[0034] 10. Water inlet pipe; 11. Water inlet level; 12. Water inlet; 13. Water inlet adjustment level; 14. First cavity; 15. First filling block;

[0035] 20. Water outlet pipe; 21. Water outlet level; 22. Water outlet; 23. Water outlet adjustment level; 24. Second cavity; 25. Second filling block;

[0036] 30. Heat exchange sleeve assembly; 31. Inner tube; 32. Outer tube; 33. Interlayer;

[0037] 40. Refrigerant inlet pipe; 41. Refrigerant inlet;

[0038] 50. Refrigerant outlet pipe; 51. Refrigerant outlet;

[0039] 60. The first branch;

[0040] 70. Second branch;

[0041] 80. Regulating tube. DETAILED DESCRIPTION

[0042] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0044] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed" and the like used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a welding connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] like Figures 1 to 5As shown, a preferred embodiment of the present invention provides an integrated tubular heat exchanger, comprising a water inlet pipe 10, a water outlet pipe 20 and at least two groups of heat exchange sleeve assemblies 30, wherein a water inlet 12 is provided at a water inlet position 11 of the water inlet pipe 10, and the water inlet pipe 10 is provided with a water inlet adjustment position 13 away from the water inlet position 11 and with a gradually reduced inner diameter of the pipe along its axial direction, the water inlet position 11 leads to the water inlet adjustment position 13 to define a water inlet cavity for conveying hot water to be exchanged, and a water outlet 21 of the water outlet pipe 20 is provided with a water outlet The outlet pipe 20 is provided with a water outlet adjusting position 23 along its axial direction which is away from the water outlet level 21 and whose inner diameter gradually decreases. The water outlet adjusting position 23 leads to the water outlet level 21 to define a water outlet cavity for outputting heated water. At least two groups of heat exchange sleeve assemblies 30 are connected in parallel between the water inlet pipe 10 and the water outlet pipe 20. The water inlet level 11 is communicated with the water outlet adjusting position 23, and the water inlet adjusting position 13 is communicated with the water outlet level 21.

[0046] Based on the integrated tubular heat exchanger of the above technical features, the water inlet pipe 10 is provided with the water inlet adjusting position 13 with a gradually decreasing inner diameter of the pipe, so as to ensure that the water flow rate at each position of the water inlet chamber in the flow direction is uniform, and avoid the problem of too little water distribution at the position far away from the water inlet position 11. The water inlet adjusting position 13 with a gradually decreasing inner diameter of the pipe is provided on the water outlet pipe 20. The water inlet position 11 can be communicated with the water outlet adjusting position 23 through one group of the heat exchange sleeve assemblies 30, and the water inlet adjusting position 13 can be communicated with the water outlet position 21 through another group of the heat exchange sleeve assemblies 30, so as to ensure that the water flow rate of the water outlet chamber is uniform, and at the same time, the distance of the hot water exchanged by each heat exchange sleeve assembly 30 from the water inlet 12 to the water outlet 22 is equal, which greatly reduces the water resistance formed by cross flow and different flow rates, and achieves the purpose of uniform heat exchange effect by uniformly distributing water and reducing water resistance, thereby improving the overall heat exchange efficiency, and having the advantages of low production cost and long service life.

[0047] In this embodiment, the water inlet level 11 is set at one end of the water inlet pipe 10, the water inlet adjustment level 13 is set at the other end of the water inlet pipe 10, the water outlet level 21 is set at one end of the water outlet pipe 20, and the water outlet adjustment level 23 is set at the other end of the water outlet pipe 20, so that the water path flows from one end of the water inlet pipe 10 to the other end and from one end of the water outlet pipe 20 to the other end, avoiding the problem of water path crossing and further ensuring the uniformity of water distribution. The water inlet 12 and the water outlet 22 are set on the same side, and the heat exchange sleeve assembly 30 is set on the other opposite side, so that the water inlet 12 and the water outlet 22 are conveniently connected to the external refrigeration components.

[0048] In this embodiment, the water inlet chamber and the water outlet chamber are both graded, adapted to the step-by-step change in water volume, ensuring that each level of the water inlet chamber and the water outlet chamber has the same flow rate, and delivers the hot water to be exchanged to the corresponding heat exchange sleeve assembly 30.

[0049] Specific, combined Figure 1 and Figure 4 As shown, the water inlet cavity includes a plurality of stepped first cavities 14, the inner diameter of the first cavity 14 gradually decreases in the direction away from the water inlet level 11, and the water outlet cavity includes a plurality of stepped second cavities 24, the inner diameter of the second cavity 24 gradually decreases in the direction away from the water outlet level 21, and the first cavities 14 of each level are connected to the second cavities 24 of each level in a one-to-one correspondence, that is, the inner diameter of the first cavity 14 located at the water inlet level 11 is the largest, and the inner diameter of the first cavity 14 away from the water inlet level 11 is the largest. The inner diameter of the tube is gradually reduced. The inner diameter of the second cavity 24 located at the water outlet 21 is the largest, and the inner diameter of the second cavity 24 far from the water outlet 21 is gradually reduced. The first cavity 14 of the first stage (with the largest inner diameter) is connected to the second cavity 24 of the last stage (with the smallest inner diameter) through the heat exchange sleeve assembly 30, and the first cavity 14 of the second stage is connected to the second cavity 24 of the second last stage through the heat exchange sleeve assembly 30, and so on, so as to achieve uniform water distribution in each group of the heat exchange sleeve assembly 30 and reduce water resistance. Among them, the heat exchange sleeve assembly 30 is provided between each level of the first cavity 14 and the corresponding second cavity 24 to ensure the maximum heat exchange efficiency.

[0050] Furthermore, a first filling block 15 for changing the inner diameter of the tube is provided in the first cavity 14, and a second filling block 25 for changing the inner diameter of the tube is provided in the second cavity 24. The inner diameter of the tube is changed by means of the first filling block 15 and the second filling block 25, thereby defining the corresponding water inlet cavity and the water outlet cavity.

[0051] Specifically, the first filling block 15 and the second filling block 25 are both circular tubes with two ends connected. The outer wall of each first filling block 15 abuts against the inner wall of the water inlet pipe 10, and the inner wall of the first filling block 15 is defined as the corresponding first cavity 14. The outer wall of each second filling block 25 abuts against the inner wall of the water outlet pipe 20, and the inner wall of the second filling block 25 is defined as the corresponding second cavity 24. By fixing each first filling block 15 on the inner wall of the water inlet pipe 10, the inner walls of each first filling block 15 are connected to form the water inlet cavity, and fixing each second filling block 25 on the inner wall of the water outlet pipe 20, the inner walls of each second filling block 25 are connected to form the water outlet cavity, so that the shapes of the water inlet cavity and the water outlet cavity can be quickly adjusted, and the flexibility is high, and corresponding adjustments can be made according to the heat exchange sleeve assembly 30 of different specifications. In addition, the existing integrated tube heat exchanger can be modified, and the application range is wide.

[0052] Among them, the first filling block 15 is arranged on the water inlet adjustment position 13, and the water inlet level 11 directly uses the inner wall of the water inlet pipe 10 to form the first cavity 14; the second filling block 25 is arranged on the water outlet adjustment position 23, and the water outlet level 21 directly uses the inner wall of the water outlet pipe 20 to form the second cavity 24, thereby reducing the production cost.

[0053] Among them, the first filling block 15 and the second filling block 25 are both provided with a through hole communicating with the heat exchange sleeve assembly 30. The structure connected to the heat exchange sleeve assembly 30 through the through hole avoids excessive influence on the overall shape of the water inlet chamber and the water outlet chamber, thereby reducing factors affecting the uniform distribution of water.

[0054] In this embodiment, the water flow rates of the heat exchange sleeve assemblies 30 are equal. The water flow rates of each group of the heat exchange sleeve assemblies 30 can be equal by calculating the inner diameter of the tube corresponding to the first cavity 14. For example, if the water flow rate of the water inlet pipe 10 is Q m3 / h, the water flow rate is distributed step by step to the five groups of the heat exchange sleeve assemblies 30. The water flow rate of each group of the heat exchange sleeve assemblies 30 is Q / 5m3 / h. In order to keep the flow rate of the water inlet cavity unchanged, the corresponding cross-sectional area, that is, the inner diameter of the tube corresponding to the first cavity 14, can be calculated. Then, the first filling block 15 and the second filling block 25 of corresponding specifications are selected for production and manufacturing, thereby ensuring that the water flow rates of the heat exchange sleeve assemblies 30 are equal in the working state, so as to achieve the purpose of the same heat exchange effect.

[0055] In this embodiment, if Figure 1 and Figure 2As shown, the integrated tubular heat exchanger also includes a refrigerant inlet pipe 40 and a refrigerant outlet pipe 50. The refrigerant inlet pipe 40 is provided with a refrigerant inlet 41. The refrigerant inlet pipe 40 is provided with a plurality of first branch pipes 60 along its axial direction. The first branch pipe 60 is communicated with the heat exchange sleeve assembly 30 at one end close to the water outlet pipe 20. The refrigerant outlet pipe 50 is provided with a refrigerant outlet 51. The refrigerant outlet pipe 50 is provided with a plurality of second branch pipes 70 along its axial direction. The second branch pipe 70 is communicated with the heat exchange sleeve assembly 30 at one end close to the water inlet pipe 10. The refrigerant inlet pipe 40 distributes the refrigerant to each of the heat exchange sleeve assemblies 30 through each of the first branch pipes 60, and then collects the refrigerant after heat exchange through each of the second branch pipes 70, and transports it out from the refrigerant outlet pipe 50, so that the overall structure is compact.

[0056] In this embodiment, combined with Figure 3 and Figure 5 As shown, the first branch pipe 60 is provided with a regulating pipe 80 for regulating the refrigerant flow. In the refrigerant inlet pipe 40, the refrigerant flow will gradually decrease at a position away from the refrigerant inlet 41. Therefore, the regulating pipe 80 is provided for adjustment to gradually increase the refrigerant flow, so that the refrigerant flow in each of the first branch pipes 60 is uniform and equal, thereby ensuring that the refrigerant medium is evenly distributed to each group of the heat exchange sleeve assemblies 30.

[0057] Furthermore, the inner diameter of the regulating tube 80 near the refrigerant inlet 41 is smaller than the inner diameter of the regulating tube 80 far from the refrigerant inlet 41. By controlling the inner diameter of the regulating tube 80, the uniform distribution of the refrigerant medium is achieved, the inner diameter of the regulating tube 80 far from the refrigerant inlet 41 is expanded, and the refrigerant flow rate of the first branch pipe 60 far from the refrigerant inlet 41 is gradually increased, so as to achieve the purpose of uniform distribution of the refrigerant flow rate of each first branch pipe 60. Among them, the inner diameter of the regulating tube 80 is 1mm to 5mm, the outer wall of the regulating tube 80 is in contact with the inner wall of the first branch pipe 60, and the refrigerant flow rate m of the regulating tube 80 is proportional to the sth power of the inner diameter of the tube, that is, the larger the inner diameter of the tube, the larger the refrigerant flow rate.

[0058] Furthermore, the length of the regulating tube 80 near the refrigerant inlet 41 is greater than the length of the regulating tube 80 far from the refrigerant inlet 41. By controlling the length of the regulating tube 80, the uniform distribution of the refrigerant medium is achieved. The length of the regulating tube 80 near the refrigerant inlet 41 is increased, and the refrigerant flow of the first branch pipe 60 near the position of the refrigerant inlet 41 is gradually reduced, so as to achieve the purpose of uniform distribution of the refrigerant flow of each first branch pipe 60. Among them, the length of the regulating tube 80 is 10mm to 100mm, the length of the regulating tube 80 is not greater than the length of the first branch pipe 60, and the refrigerant flow m of the regulating tube 80 is inversely proportional to the kth power of the length of the regulating tube 80, that is, the shorter the length, the greater the refrigerant flow.

[0059] It is understandable that the refrigerant flow rate can also be controlled by simultaneously changing the inner diameter and length of the tube. For example, the regulating tube 80 close to the refrigerant inlet 41 is a long tube with a small inner diameter, and the regulating tube 80 away from the refrigerant inlet 41 is a short tube with a large inner diameter. There are many combinations here, as long as the uniform distribution of the refrigerant flow rate can be achieved, the present invention will not be described in detail here.

[0060] In this embodiment, if Figure 1 and Figure 2 As shown, the heat exchange sleeve assembly 30 is arranged in a multi-turn winding shape side by side, which lengthens the processing path of each group of the heat exchange sleeve assembly 30 and further improves the heat exchange effect.

[0061] In this embodiment, the heat exchange sleeve assembly 30 includes an inner tube 31 and an outer tube 32, wherein the outer tube 32 is sleeved on the outer side of the inner tube 31, and an interlayer 33 for refrigerant to flow is formed between the outer tube 32 and the inner tube 31, one end of the inner tube 31 is in communication with the water inlet pipe 10, the other end of the inner tube 31 is in communication with the water outlet pipe 20, and the first branch pipe 60 and the second branch pipe 70 are respectively in communication with the interlayer 33. A heat exchange water circuit is formed through the inner tube 31, and when the water circuit flows, the refrigerant medium flows in the interlayer 33 along the opposite flow direction, and in this process, a heat exchange effect is achieved.

[0062] In summary, the embodiment of the present invention provides an integrated tubular heat exchanger which mainly has the following two advantages: (1) achieving uniform distribution of water flow, a stepped water inlet chamber with a gradually decreasing inner diameter is arranged in the water inlet pipe 10, and the flow rates of each stage of the water inlet chamber are controlled to be the same, so as to achieve the purpose of uniform distribution of water flow, and a water outlet chamber with a corresponding structure is also arranged in the water outlet pipe 20 to ensure that the flow rates of each stage of the water outlet chamber are the same, and at the same time, the purpose of reducing water resistance can be achieved, and the heat exchange effect of each group of the heat exchange sleeve assembly 30 is ensured to be uniform, thereby greatly improving the overall heat exchange efficiency; (2) achieving uniform distribution of refrigerant flow, the regulating pipe 80 is arranged in the first branch pipe 60, and the inner diameter and / or length of each regulating pipe 80 is controlled to achieve the purpose of uniform distribution of refrigerant medium, the utilization rate of the refrigerant medium is high, and the uniformity of the heat exchange effect of each group of the heat exchange sleeve assembly 30 is further improved.

[0063] The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An integrated tubular heat exchanger, characterized in that, it includes: a water inlet pipe, an inlet water level of the water inlet pipe is provided with a water inlet, the water inlet pipe is provided with a water inlet adjustment position along its axial direction that is far from the inlet water level and the inner diameter of the pipe gradually decreases, the inlet water level leads to the water inlet adjustment position to define a water inlet cavity for conveying hot water to be exchanged, a water outlet pipe, an outlet water level of the water outlet pipe is provided with a water outlet, the water outlet pipe is provided with a water outlet adjustment position along its axial direction that is far from the outlet water level and the inner diameter of the pipe gradually decreases, the water outlet adjustment position leads to the outlet water level to define a water outlet cavity for outputting the exchanged hot water, the water inlet cavity includes multiple first cavities in a stepped manner, the inner diameter of the first cavity gradually decreases in the direction away from the inlet water level, the water outlet cavity includes multiple second cavities in a stepped manner, the inner diameter of the second cavity gradually decreases in the direction away from the outlet water level, at least two groups of heat exchange sleeve assemblies, each heat exchange sleeve assembly is connected in parallel between the water inlet pipe and the water outlet pipe, the inlet water level communicates with the water outlet adjustment position, and the water inlet adjustment position communicates with the outlet water level, the first cavity at the first stage with the largest inner diameter and the second cavity at the penultimate stage with the smallest inner diameter communicate through the heat exchange sleeve assembly, the first cavity at the second stage communicates with the second cavity at the penultimate second stage through the heat exchange sleeve assembly, and so on, each stage of the first cavity and each stage of the second cavity communicate with each other correspondingly; a first filling block for changing the inner diameter of the pipe is arranged in the first cavity, and a second filling block for changing the inner diameter of the pipe is arranged in the second cavity; the first filling block and the second filling block are both provided with through holes communicating with the heat exchange sleeve assembly; a refrigerant inlet pipe, the refrigerant inlet pipe is provided with a refrigerant inlet, the refrigerant inlet pipe is provided with a number of first branch pipes along its axial direction, and the first branch pipes communicate with the heat exchange sleeve assembly; the first branch pipe is provided with an adjustment pipe for adjusting the refrigerant flow rate; the inner diameter of the adjustment pipe near the refrigerant inlet is smaller than the inner diameter of the adjustment pipe far from the refrigerant inlet.

2. The integrated tubular heat exchanger according to claim 1, characterized in that, the inlet water level is arranged at one end of the water inlet pipe, the water inlet adjustment position is arranged at the other end of the water inlet pipe, the outlet water level is arranged at one end of the water outlet pipe, and the water outlet adjustment position is arranged at the other end of the water outlet pipe.

3. The integrated tubular heat exchanger according to claim 1, characterized in that, both the water inlet cavity and the water outlet cavity are in a hierarchical form.

4. The integrated tubular heat exchanger according to claim 1, characterized in that, a heat exchange sleeve assembly is arranged between each stage of the first cavity and the corresponding second cavity.

5. The integrated tubular heat exchanger according to claim 1, characterized in that, both the first filling block and the second filling block are round pipes with both ends communicating, the outer wall of each first filling block abuts against the inner wall of the water inlet pipe, and the outer wall of each second filling block abuts against the inner wall of the water outlet pipe.

6. The integrated tubular heat exchanger according to claim 1, characterized in that, the water flow rates of each heat exchange sleeve assembly are equal.

7. The integrated tubular heat exchanger according to any one of claims 1 to 6, characterized in that, the first branch pipe communicates with the heat exchange sleeve assembly at one end close to the water outlet pipe, further comprising a refrigerant outlet pipe provided with a refrigerant outlet, the refrigerant outlet pipe is provided with a plurality of second branch pipes along its axial direction, and the second branch pipes communicate with the heat exchange sleeve assembly at one end close to the water inlet pipe.

8. The integrated tubular heat exchanger according to claim 1, characterized in that, the inner diameter of the regulating pipe is 1 mm to 5 mm.

9. The integrated tubular heat exchanger according to claim 1, characterized in that, the length of the regulating pipe close to the refrigerant inlet is greater than the length of the regulating pipe away from the refrigerant inlet.

10. The integrated tubular heat exchanger according to claim 1, characterized in that, the length of the regulating pipe is 10 mm to 100 mm.

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