Vacuum diffusion welding device for heat exchanger

Abstract

The invention relates to a vacuum diffusion welding device for a heat exchanger, and relates to the technical field of welding devices. A heat exchanger vacuum diffusion welding device comprises a mounting frame, a welding furnace body, a radiation heating assembly and an airflow heating assembly, the welding furnace body is arranged on the mounting frame, the radiation heating assembly is arranged in the welding furnace body, and the radiation heating assembly is arranged on the peripheral side of a heat exchanger in a surrounding mode; the airflow heating assembly comprises a gas circulating pipeline and a gas heating device, the gas circulating pipeline communicates with an internal flow channel of the heat exchanger, and the gas heating device is used for heating gas in the gas circulating pipeline, so that the heated gas enters the internal flow channel of the heat exchanger and heats the heat exchanger. The radiation heating assembly and the airflow heating assembly are matched with each other, the structural characteristic that a liquid or gas flow channel is formed in the heat exchanger is fully utilized, the heat exchanger is heated inside and outside at the same time, the temperature rising speed of the heat exchanger is remarkably increased, and therefore the welding efficiency and the welding effect of the heat exchanger are improved.

Description

Technical Field

[0001] The present application relates to the technical field of welding devices, and in particular to a vacuum diffusion welding device for a heat exchanger. Background Art

[0002] Vacuum diffusion welding is a precision process that does not require processing after welding. During diffusion welding, the solid joint surfaces of the two parts are joined to reach the interatomic distance by means of temperature (lower than the melting point of the base material), pressure, time and vacuum, and the atoms diffuse with each other to achieve interatomic embedding diffusion bonding. It is suitable for welding between dissimilar and homogeneous materials. Various gas or liquid flow channels need to be set up inside the existing heat exchanger, so diffusion welding equipment is usually used for processing and production. In the related technical scheme, the diffusion welding device processes the heat exchanger by heating through thermal radiation and applying pressure. During processing, the heat exchanger gradually heats up from the outside to the inside, and the heating rate is slow, resulting in low processing efficiency. Summary of the invention

[0003] The purpose of this application is to provide a heat exchanger vacuum diffusion welding device to solve the above technical problems.

[0004] An embodiment of the present invention provides a heat exchanger vacuum diffusion welding device, which includes: a mounting frame, a welding furnace body, a radiation heating component and an airflow heating component, the welding furnace body is arranged on the mounting frame, the radiation heating component is arranged inside the welding furnace body, and the radiation heating component is arranged around the heat exchanger, the airflow heating component includes a gas circulation pipeline and a gas heating device, the gas circulation pipeline is connected to the internal flow channel of the heat exchanger, and the gas heating device is used to heat the gas in the gas circulation pipeline so that the heated gas enters the internal flow channel of the heat exchanger and heats the heat exchanger.

[0005] Optionally, the heat exchanger vacuum diffusion welding device also includes a circulating cooling device and a furnace chamber cooling assembly, the circulating cooling device is connected to the gas circulation pipeline, the circulating cooling device is used to reduce the temperature of the internal flow channel of the heat exchanger, and the furnace chamber cooling assembly is arranged on the welding furnace body.

[0006] Optionally, the furnace cavity cooling assembly includes a driving device and a heat dissipation impeller. The driving device is arranged on one side of the welding furnace body, the heat dissipation impeller is arranged inside the welding furnace body, and the heat dissipation impeller is connected to the driving device. The driving device drives the heat dissipation impeller to rotate to generate a heat dissipation airflow.

[0007] Optionally, the heat exchanger vacuum diffusion welding device also includes a liquid cooling component, the liquid cooling component includes a liquid cooling device and a liquid circulation pipeline, the side wall of the welding furnace body is provided with a liquid cooling cavity, the liquid cooling cavity is connected to the liquid cooling device via the liquid circulation pipeline, and the liquid cooling device is used to reduce the liquid temperature in the liquid cooling cavity to cool the surface of the welding furnace body.

[0008] Optionally, the welding furnace body comprises an inner furnace body and an outer furnace body, the outer furnace body is sleeved on the outside of the inner furnace body, and the inner furnace body and the outer furnace body are spaced apart, and a liquid cooling cavity is defined between the inner furnace body and the outer furnace body.

[0009] Optionally, the heat exchanger vacuum diffusion welding device also includes a pressurizing assembly, which includes a lower pressure head, an upper pressure head, a push rod and a hydraulic device arranged on a mounting frame, the upper pressure head and the lower pressure head are symmetrically arranged inside the welding furnace body, one end of the push rod is connected to the telescopic rod of the hydraulic device, and the other end of the push rod extends to the interior of the welding furnace body and is connected to the upper pressure head.

[0010] Optionally, the heat exchanger vacuum diffusion welding device further includes a vacuum pumping component, which includes a vacuum pump and a flexible gas pipeline, and the vacuum pump is connected to the interior of the welding furnace body via the flexible gas pipeline.

[0011] Optionally, the welding furnace body further includes a conveying mechanism, and the conveying mechanism is used to place the heat exchanger inside the welding furnace body or take the heat exchanger out of the welding furnace body.

[0012] Optionally, the radiation heating assembly includes a top heating element, a bottom heating element, a side heating element, a front heating element and a rear heating element, the top heating element, the bottom heating element, the side heating element, the front heating element and the rear heating element are all molybdenum-lanthanum alloy heating elements, and the inner wall of the welding furnace body is provided with a mirror reflection layer, and the mirror reflection layer is used to reflect the heat of the radiation heating assembly.

[0013] Optionally, the heat exchanger vacuum diffusion welding device further comprises a central control component, and the central control component is electrically connected to the radiation heating component and the airflow heating component.

[0014] The present invention provides a heat exchanger vacuum diffusion welding device, which includes: a mounting frame, a welding furnace body, a radiation heating component and an airflow heating component. The welding furnace body is arranged on the mounting frame, and a radiation heating component is arranged on the welding furnace body and arranged inside the welding furnace body, and the radiation heating component is arranged around the heat exchanger. The airflow heating component includes a gas circulation pipeline and a gas heating device, the gas circulation pipeline is connected to the internal flow channel of the heat exchanger, and the gas heating device is used to heat the gas in the gas circulation pipeline, so that the heated gas enters the internal flow channel of the heat exchanger and heats the heat exchanger. The radiation heating component and the airflow heating component cooperate with each other, making full use of the structural feature that there is a liquid or gas flow channel inside the heat exchanger, so as to achieve simultaneous heating of the inside and outside of the heat exchanger, significantly improve the heating rate of the heat exchanger, and thus improve the welding efficiency and welding effect of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A front view of a heat exchanger vacuum diffusion welding device provided in an embodiment of the present application; Figure 2 A structural diagram of an airflow heating assembly in a heat exchanger vacuum diffusion welding device provided in an embodiment of the present application; Figure 3 A cross-sectional view of a welding furnace body in a heat exchanger vacuum diffusion welding device provided in an embodiment of the present application; Figure 4 A structural diagram of a pressurizing component in a heat exchanger vacuum diffusion welding device provided in an embodiment of the present application; Figure 5 A top view of a heat exchanger vacuum diffusion welding device provided in an embodiment of the present application.

[0017] Icons: 100-mounting frame; 200-welding furnace body; 300-radiation heating component; 400-airflow heating component; 401-gas circulation pipeline; 402-gas heating device; 501-circulating cooling device; 5021-driving device; 5022-heat dissipation impeller; 601-liquid cooling chamber; 201-inner furnace body; 202-outer furnace body; 700-pressurization component; 701-lower pressure head; 702-upper pressure head; 703-thrust rod; 704-hydraulic device; 800-vacuum extraction component; 900-conveying mechanism; 1000-central control component. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] In the description of the present application, it should be noted that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0020] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] The present embodiment provides a heat exchanger vacuum diffusion welding device, which includes: a mounting frame 100, a welding furnace body 200, a radiation heating component 300 and an airflow heating component 400. The welding furnace body 200 is arranged on the mounting frame 100, the radiation heating component 300 is arranged inside the welding furnace body 200, and the radiation heating component 300 is arranged around the side of the heat exchanger. The airflow heating component 400 includes a gas circulation pipeline 401, a gas heating device 402 and a circulation fan. The gas circulation pipeline 401 is connected to the internal flow channel of the heat exchanger. The gas heating device 402 is used to heat the gas in the gas circulation pipeline 401. The circulation fan allows the heated gas to enter the internal flow channel of the heat exchanger and heat the heat exchanger.

[0022] Please refer to Figure 1 and Figure 2As shown, the heat exchanger vacuum diffusion welding device is used to perform vacuum diffusion welding operations on the heat exchanger. The mounting frame 100 is used to fix and support the welding furnace body 200, the radiation heating component 300 and the airflow heating component 400 and other devices to ensure the stability of the equipment. A welding cavity is set inside the welding furnace body 200, and the welding heat exchanger is welded in the welding cavity. The welding furnace body 200 is provided with a furnace door, which is convenient for opening the welding furnace body 200 and placing the heat exchanger in the welding furnace body 200. A radiation heating component 300 is set inside the welding furnace body 200. The radiation heating component 300 can adopt the same technical solution as the related technology of the heat exchanger vacuum diffusion welding device. The structure and installation method of the radiation heating component 300 are not the invention points protected by this application, so there is no restriction, and it can meet the heating and welding of the heat exchanger. It can be understood that when the radiation heating component 300 heats the heat exchanger, the heat exchanger gradually heats up from the outside to the inside, which is not only uneven in temperature, but also slow in temperature, resulting in low welding process efficiency. Especially for large heat exchangers (meter-level heat exchangers with specifications greater than 1000X1000X1000mm), the disadvantage of too long heating time during welding is particularly obvious. Therefore, in this embodiment, an airflow heating component 400 is set to heat the heat exchanger from the inside, so that the inside and outside of the heat exchanger to be welded are heated synchronously, thereby improving the welding efficiency. The airflow heating component 400 includes a gas circulation pipeline 401 and a gas heating device 402. The gas circulation pipeline 401 is connected to the internal flow channel of the heat exchanger. After the gas heating device 402 heats the gas in the gas circulation pipeline 401, the circulation fan drives the gas to circulate along the circulation pipeline. During the gas circulation process, the heated hot gas passes through the internal flow channel of the heat exchanger, thereby transporting the heat to the inside of the heat exchanger and heating from the inside of the heat exchanger. The radiation heating component 300 and the airflow heating component 400 cooperate with each other, making full use of the structural feature that there is a liquid or gas flow channel inside the heat exchanger, realizing simultaneous heating of the inside and outside of the heat exchanger, significantly improving the heating rate of the heat exchanger, thereby improving the welding efficiency and welding effect of the heat exchanger.

[0023] It should be noted that the gas heating device 402 and the circulating fan can be arranged outside the welding furnace body 200, and the gas circulation pipeline 401 adopts a high temperature resistant pipeline such as a stainless steel pipeline or a ceramic pipeline. The welding furnace body 200 can be provided with an air inlet and an exhaust hole, so as to facilitate the gas circulation pipeline 401 to be extended to the welding furnace body 200 and communicate with the internal flow channel of the heat exchanger. The gas heating device 402 and the circulating fan are arranged outside the welding furnace body 200. On the one hand, it can avoid the high temperature inside the vacuum welding box from damaging the gas heating device 402 and the circulating fan. On the other hand, it is also more convenient to replace and maintain the gas heating device 402 and the circulating fan arranged outside the welding furnace body 200. Since the temperature of the gas circulating in the gas circulation pipeline 401 is relatively high, in order to ensure the safety of use and service life of the circulating fan, the circulating fan can adopt a circulating fan with a water cooling structure, and the body of the circulating fan is cooled by an external water cooling device.

[0024] Optionally, the heat exchanger vacuum diffusion welding device also includes a circulating cooling device 501 and a furnace cavity cooling assembly, the circulating cooling device 501 is connected to the gas circulation pipeline 401, the circulating cooling device 501 is used to reduce the temperature of the internal flow channel of the heat exchanger, and the furnace cavity cooling assembly is arranged on the welding furnace body 200, and the furnace cavity cooling assembly is used to reduce the internal temperature of the welding furnace body 200.

[0025] Since the heat exchanger needs to be cooled after welding, the related technology sets an air cooling device in the welding furnace body 200 to accelerate the flow rate of the gas in the welding furnace body 200 and quickly reduce the temperature of the workpiece. When this method is used to dissipate heat, the temperature of the heat exchanger gradually decreases from the outside to the inside, resulting in a slow cooling time. For example, when the temperature of the above-mentioned meter-level heat exchanger drops from the welding temperature to 100°C, it takes up to 24 hours. Please refer to Figure 2 and Figure 3 As shown, in some possible embodiments, the gas circulation pipeline 401 is also connected to a circulating cooling device 501. When welding is completed, the gas heating device 402 connected to the gas circulation pipeline 401 is turned off, and the circulating cooling device 501 is started to cool the gas in the gas circulation pipeline 401. The cooled gas flows through the internal flow channel of the heat exchanger under the action of the circulating fan, thereby exchanging heat with the welded heat exchanger and quickly reducing the temperature of the heat exchanger. When the furnace cavity cooling component reduces the temperature inside the furnace cavity, the welded heat exchanger is cooled from the outside of the heat exchanger, and the circulating cooling device 501 forms a cooling circulating airflow inside the heat exchanger to cool from the inside of the heat exchanger. The simultaneous cooling of the inside and outside of the heat exchanger can reduce the original 24-hour cooling time to less than 3 hours, significantly improving the cooling efficiency of the heat exchanger.

[0026] Optionally, in some possible embodiments, the furnace cavity cooling assembly includes a driving device 5021 and a heat dissipation impeller 5022, the driving device 5021 is arranged on one side of the welding furnace body 200, the heat dissipation impeller 5022 is arranged inside the welding furnace body 200, and the heat dissipation impeller 5022 is connected to the driving device 5021, and the driving device 5021 drives the heat dissipation impeller 5022 to rotate to generate a heat dissipation airflow.

[0027] Please refer to Figure 3 As shown, the driving device 5021 is arranged on a side of the vacuum welding furnace chamber away from the furnace door, and the driving device 5021 can be a motor or a rotary cylinder. The driving device 5021 is arranged outside the vacuum welding furnace chamber, and the driving shaft of the driving device 5021 extends to the inside of the welding furnace body 200 and is drivingly connected to the heat dissipation impeller 5022. When heat is dissipated, the furnace door is opened, and the driving device 5021 is started to drive the heat dissipation impeller 5022 to rotate, so that the hot air in the welding furnace body 200 is blown out from the furnace door, so as to cool down the inside of the welding furnace body 200 and the heat exchanger after welding.

[0028] Optionally, in some possible embodiments, the heat exchanger vacuum diffusion welding device also includes a liquid cooling component, the liquid cooling component includes a liquid cooling device and a liquid circulation pipeline, the side wall of the welding furnace body 200 is provided with a liquid cooling cavity 601, the liquid cooling cavity 601 is connected to the liquid cooling device via the liquid circulation pipeline, and the liquid cooling device is used to reduce the liquid temperature in the liquid cooling cavity 601 to cool the surface of the welding furnace body 200.

[0029] The temperature of the internal cavity of the welding furnace body 200 is relatively high. In order to prevent the welding furnace body 200 from being damaged or injuring the operator due to the excessive temperature of the welding furnace body 200, a liquid cooling chamber 601 or a cooling channel is provided on the welding furnace body 200. The liquid cooling chamber 601 or the cooling channel is connected to the liquid cooling device through a liquid circulation pipeline. The liquid cooling device reduces the coolant and continuously circulates the liquid in the liquid cooling chamber 601, thereby reducing the temperature of the welding furnace body 200 and ensuring the safety of the welding furnace body 200.

[0030] Optionally, in some possible embodiments, flow sensors and impeller-type water flow sight glasses can be installed on the liquid circulation pipeline, and the system can realize water outage alarm, water overtemperature alarm, water pressure abnormality alarm and other interlocking controls, so as to provide comprehensive protection for the equipment and ensure the safety of the liquid cooling components and the welding furnace body 200.

[0031] Optionally, see Figure 3 As shown, in some possible embodiments, the welding furnace body 200 includes an inner furnace body 201 and an outer furnace body 202, the outer furnace body 202 is sleeved on the outside of the inner furnace body 201, and the inner furnace body 201 and the outer furnace body 202 are spaced apart, and a liquid cooling cavity 601 is defined between the inner furnace body 201 and the outer furnace body 202.

[0032] Please refer to Figure 3 As shown, the welding furnace body 200 is a double-layer structure consisting of an inner furnace body 201 and an outer furnace body 202. The gap between the inner furnace body 201 and the outer furnace body 202 forms a liquid cooling cavity 601. When the liquid cooling cavity 601 is filled with coolant, a uniform liquid cooling layer will be formed between the inner furnace body 201 and the outer furnace body 202, thereby fully reducing the temperature of the welding furnace body 200.

[0033] Optionally, in some possible embodiments, the heat exchanger vacuum diffusion welding device also includes a pressurizing assembly 700, the pressurizing assembly 700 includes a lower pressure head 701, an upper pressure head 702, a push rod 703 and a hydraulic device 704 arranged on the mounting frame 100, the upper pressure head 702 and the lower pressure head 701 are symmetrically arranged inside the welding furnace body 200, one end of the push rod 703 is connected to the telescopic rod of the hydraulic device 704, and the other end of the push rod 703 extends to the interior of the welding furnace body 200 and is connected to the upper pressure head 702.

[0034] Please refer to Figure 4 As shown, the lower pressure head 701 is directly fixed inside the welding furnace body 200 as a static pressure head, and the heat exchanger to be welded is directly placed on the lower pressure head 701. The upper pressure head 702 is arranged opposite to the lower pressure head 701, and the upper pressure head 702 is connected to the hydraulic device 704 through the push rod 703. The hydraulic device 704 drives the upper pressure head 702 to move closer to or away from the lower pressure head 701. When the heat exchanger is placed on the lower pressure head 701, the upper pressure head 702 can be driven by the hydraulic device 704 to abut against the heat exchanger, provide pressure for the heat exchanger, and improve the welding effect of the heat exchanger.

[0035] Optionally, in some possible embodiments, the heat exchanger vacuum diffusion welding device further includes a vacuum pumping component 800 , and the vacuum pumping component 800 includes a vacuum pump and a flexible gas pipeline, and the vacuum pump is connected to the interior of the welding furnace body 200 via the flexible gas pipeline.

[0036] The vacuum pump assembly 800 may include one or more vacuum pumps, and the number of vacuum pumps may be increased or decreased according to the vacuum degree actually required. The vacuum pump is connected to the interior of the welding furnace body 200 via a flexible gas pipeline, and the flexible gas pipeline may be a metal bellows, which is convenient for connection and installation while ensuring sealing effect and vibration isolation, and achieving the requirements of working vacuum degree: 5×10-3Pa and ultimate vacuum degree: 5×10-4Pa.

[0037] Optionally, in some possible embodiments, the welding furnace body 200 further includes a conveying mechanism 900 , and the conveying mechanism 900 is used to place the heat exchanger inside the welding furnace body 200 or take the heat exchanger out of the welding furnace body 200 .

[0038] Please refer to Figure 5As shown, the conveying mechanism 900 may include an electric forklift and a guide positioning device. The guide positioning device may adopt an infrared positioning device or an electromagnetic induction positioning device. The electric forklift accurately places the heat exchanger to be welded inside the welding furnace body 200 or takes out the welded heat exchanger from the inside of the welding furnace body 200 under the positioning action of the guide positioning device. The entire operation process is completed using the conveying mechanism 900 to ensure the safety of the operator.

[0039] The radiation heating assembly 300 includes a top heating element, a bottom heating element, a side heating element, a front heating element and a rear heating element. The top heating element, the bottom heating element, the side heating element, the front heating element and the rear heating element are all molybdenum-lanthanum alloy heating elements. The inner wall of the welding furnace body 200 is provided with a mirror reflection layer, and the mirror reflection layer is used to reflect the heat of the radiation heating assembly 300.

[0040] The heating assembly is composed of six groups of heating elements, namely, a top heating element, a bottom heating element, two groups of side heating elements, a front heating element and a rear heating element. Each group of heating elements adopts a molybdenum-lanthanum alloy heating element to meet the heating requirements of welding. The heating assembly heats the heat exchanger to be welded from six directions: top, bottom, front, back, left and right to ensure the heating effect. The six groups of heating elements are independent of each other, which is convenient for individual temperature control and replacement and maintenance, thereby improving the heating effect and service life. The inner wall of the welding furnace body 200 is also provided with a mirror reflection layer, which is used to reflect the heat of the radiation heating assembly 300, thereby ensuring that the heat is concentrated inside the welding furnace body 200 to avoid heat leakage affecting the welding effect.

[0041] Optionally, in some possible embodiments, the heat exchanger vacuum diffusion welding device also includes a central control component 1000, which is electrically connected to the radiation heating component 300 and the airflow heating component 400, and the central control component 1000 drives the radiation heating component 300 and the airflow heating component 400 to work.

[0042] The central control component 1000 can use an electronic control device with automatic program control and manual control functions. The central control component 1000 can be connected to a display device to display the operating status of each part of the heat exchanger vacuum diffusion welding device in real time, and can realize the functions of process parameter programming, recording, storage of historical data, alarm, fault diagnosis, etc., such as sound and light alarms for abnormal conditions such as water pressure, water temperature, overtemperature, heating overcurrent, vacuum abnormality, power phase loss, heater short circuit to ground, etc., to ensure the safety of equipment use.

[0043] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0044] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat exchanger vacuum diffusion welding device, used for welding heat exchangers, characterized in that: include: A mounting frame (100), a welding furnace body (200), a radiation heating component (300) and an airflow heating component (400), wherein the welding furnace body (200) is arranged on the mounting frame (100), the radiation heating component (300) is arranged inside the welding furnace body (200), and the radiation heating component (300) is arranged around the side of the heat exchanger, and the airflow heating component (400) comprises a gas circulation pipeline (401), a gas heating device (402) and a circulation fan, wherein the gas circulation pipeline (401) is connected to the internal flow channel of the heat exchanger, the gas heating device (402) is used to heat the gas in the gas circulation pipeline (401), and the circulation fan is used to drive the gas to circulate along the circulation pipeline and the internal flow channel of the heat exchanger.

2. The heat exchanger vacuum diffusion welding device according to claim 1, characterized in that: The heat exchanger vacuum diffusion welding device further comprises a circulating cooling device (501) and a furnace chamber cooling component. The circulating cooling device (501) is in communication with the gas circulation pipeline (401). The circulating cooling device (501) is used to reduce the temperature of the internal flow channel of the heat exchanger. The furnace chamber cooling component is arranged on the welding furnace body (200). The furnace chamber cooling component is used to reduce the internal temperature of the welding furnace body (200).

3. The heat exchanger vacuum diffusion welding device according to claim 2, characterized in that: The furnace cavity cooling assembly comprises a driving device (5021) and a heat dissipation impeller (5022); the driving device (5021) is arranged on one side of the welding furnace body (200); the heat dissipation impeller (5022) is arranged inside the welding furnace body (200); and the heat dissipation impeller (5022) is drivingly connected to the driving device (5021); the driving device (5021) drives the heat dissipation impeller (5022) to rotate to generate a heat dissipation airflow.

4. The heat exchanger vacuum diffusion welding device according to claim 1, characterized in that: The heat exchanger vacuum diffusion welding device further comprises a liquid cooling component, the liquid cooling component comprises a liquid cooling device and a liquid circulation pipeline, a side wall of the welding furnace body (200) is provided with a liquid cooling cavity (601), the liquid cooling cavity (601) is connected to the liquid cooling device via the liquid circulation pipeline, and the liquid cooling device is used to reduce the temperature of the liquid in the liquid cooling cavity (601).

5. The heat exchanger vacuum diffusion welding device according to claim 4, characterized in that: The welding furnace body (200) comprises an inner furnace body (201) and an outer furnace body (202); the outer furnace body (202) is sleeved on the outside of the inner furnace body (201), and the inner furnace body (201) and the outer furnace body (202) are arranged at a distance; the liquid cooling cavity (601) is formed between the inner furnace body (201) and the outer furnace body (202).

6. The heat exchanger vacuum diffusion welding device according to claim 1, characterized in that: The heat exchanger vacuum diffusion welding device also includes a pressurizing component (700), the pressurizing component (700) including a lower pressure head (701), an upper pressure head (702), a push rod (703) and a hydraulic device (704) arranged on the mounting frame (100), the upper pressure head (702) and the lower pressure head (701) are symmetrically arranged inside the welding furnace body (200), one end of the push rod (703) is connected to the telescopic rod of the hydraulic device (704), and the other end of the push rod (703) extends to the inside of the welding furnace body (200) and is connected to the upper pressure head (702).

7. The heat exchanger vacuum diffusion welding device according to claim 1, characterized in that: The heat exchanger vacuum diffusion welding device further comprises a vacuum pumping component (800), wherein the vacuum pumping component (800) comprises a vacuum pump and a flexible gas pipeline, wherein the vacuum pump is connected to the interior of the welding furnace body (200) via the flexible gas pipeline.

8. The heat exchanger vacuum diffusion welding device according to claim 1, characterized in that: The welding furnace body (200) further comprises a conveying mechanism (900), wherein the conveying mechanism (900) is used to place the heat exchanger inside the welding furnace body (200) or to take the heat exchanger out of the welding furnace body (200).

9. The heat exchanger vacuum diffusion welding device according to claim 1, characterized in that: The radiation heating assembly (300) comprises a top heating element, a bottom heating element, a side heating element, a front heating element and a rear heating element, wherein the top heating element, the bottom heating element, the side heating element, the front heating element and the rear heating element are all molybdenum-lanthanum alloy heating elements, and the inner wall of the welding furnace body (200) is provided with a mirror reflection layer, and the mirror reflection layer is used to reflect the heat of the radiation heating assembly (300).

10. The heat exchanger vacuum diffusion welding device according to claim 1, characterized in that: The heat exchanger vacuum diffusion welding device further comprises a central control component (1000), wherein the central control component (1000) is electrically connected to the radiation heating component (300) and the airflow heating component (400).

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