Microwave hot air drying device and drying method

Abstract

The present invention provides a microwave hot air drying device and a drying method, including a microwave drying module, including a drying chamber and a microwave introduction component for drying a dialyzer, the drying chamber including an air inlet pipeline and an exhaust pipeline, and a microwave introduction component is installed in the drying chamber; a pressure regulating module including a first pressure regulating valve and a feedback air circuit for measuring air pressure, the first pressure regulating valve is connected to the feedback air circuit; a hot and cold air switching module including a reversing valve and a heater, one end of the reversing valve is connected to the first pressure regulating valve; the heater includes an air inlet end and an air outlet end, the air inlet end of the heater is connected to the reversing valve; and a gas distributor, one end of the gas distributor is connected to the drying chamber through an air inlet pipeline, and the other end of the gas distributor is connected to the feedback air circuit, the reversing valve and the air outlet end of the heater. The microwave hot air drying device provided by the present invention solves the problems of slow drying speed and easy damage of fiber membrane bundles in the existing dialyzer drying process.

Description

Technical Field

[0001] The invention relates to the field of dialyzer production, and in particular to a microwave hot air drying device and a drying method. Background Art

[0002] The dialyzer is composed of a membrane bundle, an outer shell, a sealing layer and an end cap. The membrane bundle is composed of multiple hollow fibers, and there are a large number of membrane pores with specific size requirements in the hollow fiber wall. The dialyzer mainly uses the principle of a semi-permeable membrane to introduce the blood and dialysate of the uremia patient into the dialyzer at the same time, so that the two flow in the opposite direction on the inside and outside of the fiber membrane wall. The toxic macromolecules in the blood can flow out through the membrane pores to the outside of the membrane wall and flow out of the body with the dialyzer. At the same time, with the help of the solute gradient, osmotic gradient and water pressure gradient on both sides of the membrane wall, the functions of removing blood toxins, replenishing blood nutrients and regulating blood pH can be achieved. If the hollow fiber wall is damaged, it will cause the patient's blood to be lost, seriously affecting the patient's dialysis treatment effect.

[0003] Therefore, in the existing dialyzer assembly production process, the wet leak detection method is used to detect the integrity of the fiber membrane wall. First, the membrane pores on the membrane wall are sealed with injection water, and then compressed air of a specific pressure is introduced into both ends of the hollow fiber membrane bundle to maintain the pressure, and the integrity of the membrane wall is judged by detecting the pressure drop value per unit time. After the detection, there is a large amount of injection water in the fiber membrane bundle. In the subsequent process steps, the excess water needs to be quickly removed to a suitable value, otherwise it will affect the shelf life, sterilization and performance of the dialyzer. The production rhythm of the dialyzer assembly production line is fast. The use of traditional hot air drying process or other single drying process will not only seriously reduce the production speed of the dialyzer assembly production line, but also due to insufficient process flexibility, it is difficult to control the dialyzer drying curve, and the fiber membrane bundle is easily damaged after the drying process step is completed. The dialyzer is composed of a membrane bundle, a shell, a sealing layer and an end cap. The membrane bundle is composed of a plurality of hollow fibers, and there are a large number of membrane pores with specific size requirements in the hollow fiber wall. The dialyzer mainly uses the principle of semi-permeable membrane to introduce the blood and dialysate of uremia patients into the dialyzer at the same time, so that the two flow in the opposite direction on the inner and outer sides of the fiber membrane wall. The toxic macromolecules in the blood can flow out through the membrane pores to the outside of the membrane wall and flow out of the body with the dialyzer. At the same time, with the help of the solute gradient, osmotic gradient and water pressure gradient on both sides of the membrane wall, it can achieve the functions of removing blood toxins, replenishing blood nutrients and regulating blood pH. If the hollow fiber wall is damaged, it will cause the loss of blood from the patient, seriously affecting the patient's dialysis treatment effect.

[0004] Therefore, in the existing dialyzer assembly production process, a wet leak detection method is used to detect the integrity of the fiber membrane wall. First, the membrane holes on the membrane wall are sealed with injection water, and then compressed air of a specific pressure is introduced into both ends of the hollow fiber membrane bundle to maintain the pressure. The integrity of the membrane wall is judged by detecting the pressure drop value per unit time. After the test, there is a large amount of injection water in the fiber membrane bundle. In the subsequent process steps, the excess water needs to be quickly removed to a suitable value, otherwise it will affect the shelf life, sterilization and performance of the dialyzer. The dialyzer assembly production line has a fast production rhythm. The use of traditional hot air drying devices or other single drying devices will not only seriously reduce the production speed of the dialyzer assembly production line, but also due to the single function of the device, it is difficult to control the dialyzer drying curve, and the fiber membrane bundle is easily damaged after the drying process step is completed. Summary of the invention

[0005] The present invention aims to provide a microwave hot air drying device and a drying method to solve the problems of slow drying speed and easy damage of fiber membrane bundles during the dialyzer drying process.

[0006] The present invention provides a microwave hot air drying device, comprising:

[0007] A microwave drying module, comprising a drying chamber for drying the dialyzer and a microwave introduction component, wherein the drying chamber comprises an air inlet pipeline and an exhaust pipeline, and the microwave introduction component is installed in the drying chamber;

[0008] A pressure regulating module, comprising a first pressure regulating valve and a feedback air circuit for measuring air pressure, wherein the first pressure regulating valve is connected to the feedback air circuit;

[0009] A cold and hot air switching module comprises a reversing valve and a heater, wherein one end of the reversing valve is connected to the first pressure regulating valve; the heater comprises an air inlet end and an air outlet end, and the air inlet end of the heater is connected to the reversing valve; and,

[0010] A gas distributor, one end of which is connected to the drying chamber through the air inlet pipeline, and the other end of which is connected to the feedback air path, the reversing valve and the air outlet of the heater.

[0011] Optionally, the pressure regulating module also includes a first air source inlet, a second air source inlet, a two-position three-way valve and two second pressure regulating valves, the first air source inlet is connected to the first pressure regulating valve; the second air source inlet is connected to the two-position three-way valve, one end of the two-position three-way valve is connected to two second pressure regulating valves, and the other end of the two-position three-way valve is connected to the first pressure regulating valve; the two second pressure regulating valves are arranged at one end of the feedback air circuit.

[0012] Optionally, the pressure regulating module also includes a pressure gauge, a pressure switch and a spiral tube, the spiral tube connecting the feedback gas circuit and the gas distributor; the pressure gauge and the pressure switch are arranged on the feedback gas circuit, and the pressure switch is arranged at one end of the feedback gas circuit close to the spiral tube; the pressure gauge is arranged at one end of the feedback gas circuit away from the second pressure regulating valve.

[0013] Optionally, the hot and cold air switching module further includes a thermocouple for detecting the internal temperature of the heater and a protection switch for cutting off the power supply, wherein the thermocouple is installed in the heater, and a resistance wire for heating is arranged in the heater; and the protection switch is installed on the outer wall of the heater.

[0014] Optionally, a first thermal resistor for detecting the supply air temperature is provided between the heater and the gas distribution chamber.

[0015] Optionally, the microwave drying module further includes a gas-controlled on-off valve, a differential pressure switch for detecting exhaust gas and a second thermal resistor for detecting exhaust gas temperature; the air intake pipeline is provided with a gas-controlled on-off valve; the exhaust pipeline is provided with the differential pressure switch and the second thermal resistor.

[0016] Optionally, the microwave drying module further comprises a tray for placing the dialyzer and a cylinder, wherein the air inlet pipeline and the air exhaust pipeline are respectively connected to both sides of the tray; the cylinder is arranged outside the drying chamber and connected to the tray, and the cylinder is used to drive the tray in and out of the drying chamber.

[0017] Optionally, the microwave introduction component includes a magnetron and a microwave power supply, and the magnetron is connected to the microwave power supply via a cable.

[0018] Optionally, it also includes an exhaust gas treatment module, which includes a steam-water separator, an exhaust fan and a condensate pump. One end of the exhaust pipeline is connected to the steam-water separator, and the exhaust fan and the condensate pump are installed on the steam-water separator.

[0019] On the other hand, a drying method of the microwave hot air drying device is also provided, which adopts a staged drying method, wherein the first drying stage is microwave hot air combined drying, and the microwave power is 5000W for 50s, and while the microwave introduction component dries the dialyzer, the gas distributor introduces 0.8 bar cold air into the drying chamber, and the ventilation time is 50s;

[0020] The second drying stage is microwave and hot air combined drying, the gas distributor introduces high-pressure hot air at 100°C and 2 bar into the drying chamber for 250 seconds; while the hot air is introduced into the drying chamber, the microwave introduction assembly dries the dialyzer, drying at a microwave power of 3500W for 100 seconds, and then changing to a microwave power of 1500W for 50 seconds;

[0021] The third drying stage is hot air drying, and the gas distributor introduces 0.8 bar cold air into the drying chamber for 10 seconds.

[0022] The microwave hot air drying device of the present invention connects the cold and hot air switching module and the microwave drying module through a gas distributor, and can realize microwave hot air combination drying, hot air drying, microwave drying and multiple drying methods, so that the drying curve rises smoothly and the drying process is controllable. The pressure of the gas entering the drying chamber can be adjusted by the pressure regulating module. By setting a heater, the temperature of the gas entering the drying chamber can be controlled. By setting a reversing valve, cold air or hot air can be switched to enter the gas distributor at any time. The actual application results show that the drying equipment designed and produced by the present invention not only effectively improves the drying rate of the dialyzer, but also avoids the damage of the fiber membrane bundle during the drying process.

[0023] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0025] Figure 1 It is a schematic structural diagram of a microwave hot air drying device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Figure 1 is a schematic structural diagram of a microwave hot air drying device according to an embodiment of the present invention. Figure 1As shown, an embodiment of the present invention provides a microwave hot air drying device, including a microwave drying module 10, a pressure regulating module 20, a cold and hot air switching module 30 and a gas distributor 4, wherein the microwave drying module 10 includes a drying chamber 11 and a microwave introduction component 12 for drying a dialyzer 7, the drying chamber 11 includes an air inlet pipeline 111 and an exhaust pipeline 112, and the drying chamber 11 is installed with the microwave introduction component 12. The pressure regulating module 20 includes a first pressure regulating valve 21 and a feedback air circuit 22 for measuring air pressure, and the first pressure regulating valve 21 is connected to the feedback air circuit 22. The cold and hot air switching module 30 includes a reversing valve 31 and a heater 32, and one end of the reversing valve 31 is connected to the first pressure regulating valve 21. The heater 32 includes an air inlet end and an air outlet end, and the air inlet end of the heater 32 is connected to the reversing valve 31. One end of the gas distributor 4 is connected to the drying chamber 11 through the air inlet pipeline 111, and the other end of the gas distributor 4 is connected to the feedback air circuit 22, the reversing valve 31 and the air outlet end of the heater 32.

[0027] The microwave hot air drying device of the embodiment of the present invention connects the cold and hot air switching module 30 and the microwave drying module 10 through the gas distributor 4, which can realize microwave hot air combination drying, hot air drying, microwave drying and multiple drying methods, so that the drying curve rises smoothly and the drying process is controllable. The pressure of the gas entering the drying chamber 11 can be adjusted by the pressure regulating module 20. By setting the heater 32, the temperature of the gas entering the drying chamber 11 can be controlled. By setting the reversing valve 31, the cold air or hot air can be switched to enter the gas distributor 4 at any time. The actual application results show that the drying equipment designed and produced by the present invention not only effectively improves the drying rate of the dialyzer 7, but also avoids the damage of the fiber membrane bundle during the drying process.

[0028] like Figure 1 As shown, in some embodiments of the present invention, the pressure regulating module 20 also includes a first gas source inlet 23, a second gas source inlet 24, a two-position three-way valve 25 and two second pressure regulating valves 26, and the first gas source inlet 23 is connected to the first pressure regulating valve 21. The second gas source inlet 24 is connected to the two-position three-way valve 25, one end of the two-position three-way valve 25 is connected to the two second pressure regulating valves 26, and the other end of the two-position three-way valve 25 is connected to the first pressure regulating valve 21. The two second pressure regulating valves 26 are arranged at one end of the feedback gas circuit 22. Specifically, the first gas source inlet 23 is connected to the process gas source, and the second gas source inlet 24 is connected to the operating gas source. The first pressure regulating valve 21 is a remote pressure regulating valve, and the second pressure regulating valve 26 is a precision pressure regulating valve.

[0029] Furthermore, in some embodiments of the present invention, a filter 5 is provided between the first gas source inlet 23 and the first pressure regulating valve 21 .

[0030] like Figure 1As shown, in some embodiments of the present invention, the pressure regulating module 20 further includes a pressure gauge 27, a pressure switch 28 and a spiral tube 29, and the spiral tube 29 connects the feedback gas circuit 22 and the gas distributor 4. The pressure gauge 27 and the pressure switch 28 are provided on the feedback gas circuit 22, and the pressure switch 28 is provided at one end of the feedback gas circuit 22 near the spiral tube 29. The pressure gauge 27 is provided at one end of the feedback gas circuit 22 away from the second pressure regulating valve 26. Specifically, the spiral tube 29 is a copper tube.

[0031] Specifically, the pressure regulation principle of the pressure regulating module 20 is as follows: the compressed air of the second gas source inlet 24 is passed into the pressure regulating interface of the second pressure regulating valve 26 through the two-position three-way valve 25. The gas of the first gas source inlet 23 is connected to the working interface of the second pressure regulating valve 26 through the filter 5. During operation, the connection between the two second pressure regulating valves 26 and the first pressure regulating valve 21 is switched by controlling the on and off of the two-position three-way valve 25. When one of the second pressure regulating valves 26 is connected to the first pressure regulating valve 21, the knob of the first pressure regulating valve 21 is rotated to change the regulating pressure of the second pressure regulating valve 26, thereby changing the compression amount of the internal spring of the first pressure regulating valve 21 to achieve the regulation of the process gas pressure. By observing the parameters of the pressure gauge 27 on the feedback gas circuit 22 and adjusting the knob of the first pressure regulating valve 21, a process gas source pressure can be set. Then the connection state of the two-position three-way valve 25 is changed to connect the other second pressure regulating valve 26 to the first pressure regulating valve 21, and another process gas source pressure can be set in the same way.

[0032] like Figure 1 As shown, in some embodiments of the present invention, the hot and cold air switching module 30 further includes a thermocouple 33 for detecting the internal temperature of the heater 32 and a protection switch 34 for cutting off the power supply, the thermocouple 33 is installed in the heater 32, and a resistance wire 321 for heating is provided in the heater 32. The protection switch 34 is installed on the outer wall of the heater 32. The heater 32 heats the gas temperature to a set value by controlling the relay on and off of the resistance wire 321.

[0033] like Figure 1 As shown, in some embodiments of the present invention, a first thermal resistor 35 for detecting the supply air temperature is provided between the heater 32 and the gas distributor 4 .

[0034] Specifically, the working principle of the hot and cold air switching module 30 is as follows: in the default state, the gas flowing out of the first pressure regulating valve 21 is directly sent to the gas distributor 4 through the reversing valve 31. When hot air of a specific temperature needs to be sent in, the state of the reversing valve 31 is switched, and the gas flowing out of the first pressure regulating valve 21 flows into the air inlet end of the heater 32 through the reversing valve 31, and then flows out from the air outlet end of the heater 32 and is sent to the gas distributor 4. During the hot air sending process, the first thermal resistor 35 detects the air supply temperature. If the temperature of the heater 32 is too high, the protection switch 34 will be activated, and then the power supply will be cut off to prevent the occurrence of fire.

[0035] like Figure 1 As shown, in some embodiments of the present invention, the microwave drying module 10 further includes a gas-controlled on-off valve 13, a differential pressure switch 14 for detecting exhaust gas, and a second thermal resistor 15 for detecting exhaust gas temperature. The gas-controlled on-off valve 13 is provided on the air inlet pipeline 111. The differential pressure switch 14 and the second thermal resistor 15 are provided on the exhaust pipeline 112. The differential pressure switch 14 is used to detect whether there is gas outflow. If no gas is detected, the microwave power output will be stopped. The gas temperature at the outlet of the dialyzer 7 is detected by the second thermal resistor 15. When the rising slope of the temperature curve reaches zero, the water in the dialyzer 7 is removed to a critical value.

[0036] like Figure 1 As shown, in some embodiments of the present invention, the microwave drying module 10 further includes a tray 16 and a cylinder 17 for placing the dialyzer 7, and the two sides of the tray 16 are respectively connected to an air intake line 111 and an exhaust line 112. The cylinder 17 is arranged outside the drying chamber 11 and connected to the tray 16, and the cylinder 17 is used to drive the tray 16 to enter and exit the drying chamber 11. Specifically, a plurality of dialyzers 7 can be placed on the tray 16, and each dialyzer 7 is connected to an air intake line 111 and an exhaust line 112 at both ends.

[0037] In some embodiments of the present invention, the microwave introduction component 12 includes a magnetron and a microwave power supply. The magnetron is connected to the microwave power supply via a cable, and the output power of the microwave power supply can be adjusted by an analog quantity.

[0038] In some embodiments of the present invention, a Hall sensor for controlling the drainage of the condensate pump 63 is installed on the condensate pump 63. When the condensate level is higher than the upper limit, the condensate pump 63 starts to drain automatically, and when the level is lower than the lower limit, the condensate pump 63 stops draining.

[0039] like Figure 1 As shown, in some embodiments of the present invention, an exhaust gas treatment module 60 is also included, and the exhaust gas treatment module 60 includes a steam-water separator 61, an exhaust fan 62 and a condensate pump 63. One end of the exhaust pipe 112 is connected to the steam-water separator 61, and the exhaust fan 62 and the condensate pump 63 are installed on the steam-water separator 61.

[0040] An embodiment of the present invention further provides a drying method of the microwave hot air drying device according to any one of claims 1 to 9, wherein a staged drying method is adopted, wherein the first drying stage is microwave hot air combined drying, and the microwave power is 5000 W for 50 seconds, and while the microwave introduction component dries the dialyzer, the gas distributor introduces 0.8 bar cold air into the drying chamber, and the ventilation time is 50 seconds;

[0041] The second drying stage is microwave and hot air combined drying. The gas distributor introduces high-pressure hot air at 100°C and 2 bar into the drying chamber for 250 seconds. While the hot air is introduced into the drying chamber, the microwave introduction component dries the dialyzer. The microwave power is 3500W for 100 seconds, and then changed to 1500W for 50 seconds.

[0042] The third drying stage is hot air drying. The gas distributor introduces 0.8 bar cold air into the drying chamber, and the ventilation time is 10 s.

[0043] In this embodiment, microwave drying is divided into three stages, and the power of each stage is 5000W, 3500W, and 1500W, and the corresponding time is 50s, 100s, and 50s, respectively. Hot air drying is also divided into three stages. In the first stage of hot air, 0.8 bar cold air is introduced into the gas distributor 4 for 50s, and the second stage is introduced into high-pressure hot air with a temperature of 100°C and a pressure of 2 bar for 250s, and the third stage is introduced into 0.8 bar cold air for 10s. After the parameters are set, the hot air and microwave combined drying method is selected, and 5 dialyzers 7 are loaded into the tray 16, then the cylinder 17 is started, and the tray 16 is pushed into the drying chamber 11. The drying chamber 11 is closed, and the microwave hot air drying device starts to work.

[0044] In the first stage of microwave, the magnetron is controlled to output 5000W microwave for 50s, and at the same time, the 0.8bar low-pressure cold air flowing out of the first pressure regulating valve 21 is directly blown into the gas distributor 4 without passing through the heater 32, and then distributed to each dialyzer 7. The first stage of microwave and hot air has the same time, and the purpose is to quickly blow away the free water in the middle of the fiber membrane bundle to prevent the membrane wall from being broken when the high-pressure gas is passed.

[0045] Then the microwave and hot air drying enter the second stage at the same time, the microwave output power becomes 3500W, and the duration is 100s. After that, the microwave enters the third stage, the output power becomes 1500W, and the duration is 50s. The second stage limit time of hot air is 250s, and the state of the two-position three-way valve 25 is controlled to switch so that the gas pressure flowing out of the first pressure regulating valve 21 becomes 2bar. At the same time, the state of the reversing valve 31 is changed so that the gas flows in from the air inlet end of the heater 32 through the reversing valve 31, and then flows out from the air outlet end of the heater 32 and is sent to the gas distributor 4. During the hot air supply process, the first thermal resistor 35 detects and controls the air supply temperature to 100°C. The gas flowing into the feedback gas path 22 from the gas distributor 4 first passes through the spiral tube 29, and then passes through the pressure switch 28 and the pressure gauge 27 to feedback to the two first pressure regulating valves 21. The action of the pressure switch 28 indicates that the air supply pressure is qualified. The gas then flows out of the dialyzer 7 and enters the exhaust pipe 112. The differential pressure switch 14 detects that there is gas output, and the microwave introduction component 12 works normally. The waste steam enters the steam-water separator 61, the water vapor is discharged by the exhaust fan 62, and the condensed water is discharged by the condensed water pump 63. During the entire drying process, the gas temperature at the outlet of each dialyzer 7 is detected by the second thermal resistor 15. When the rising slope of the temperature curve reaches zero, the water in the dialyzer 7 is removed to the critical value, and the second hot air drying stage ends ahead of schedule.

[0046] The hot air drying enters the third stage, and 0.8 bar cold air is introduced to cool the dialyzer 7 for 10 seconds. At the end of the third stage, the drying chamber 11 is opened, the cylinder 17 pushes out the tray 16, and the dialyzer 7 is removed. At this point, a complete microwave hot air combined drying process is completed.

[0047] If the hot air drying method is selected, the microwave hot air drying device automatically performs the hot air drying step. Conversely, if the microwave drying method is selected, the microwave hot air drying device automatically performs the microwave drying step.

[0048] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A microwave hot air drying device, characterized in that: include: A microwave drying module, comprising a drying chamber for drying the dialyzer and a microwave introduction component, wherein the drying chamber comprises an air inlet pipeline and an exhaust pipeline, and the microwave introduction component is installed in the drying chamber; A pressure regulating module, comprising a first pressure regulating valve and a feedback air circuit for measuring air pressure, wherein the first pressure regulating valve is connected to the feedback air circuit; A cold and hot air switching module comprises a reversing valve and a heater, wherein one end of the reversing valve is connected to the first pressure regulating valve; the heater comprises an air inlet end and an air outlet end, and the air inlet end of the heater is connected to the reversing valve; and, A gas distributor, one end of which is connected to the drying chamber through the air inlet pipeline, and the other end of which is connected to the feedback air path, the reversing valve and the air outlet of the heater.

2. The microwave hot air drying device according to claim 1, characterized in that: The pressure regulating module further comprises a first gas source inlet, a second gas source inlet, a two-position three-way valve and two second pressure regulating valves, wherein the first gas source inlet is connected to the first pressure regulating valve; the second gas source inlet is connected to the two-position three-way valve, one end of the two-position three-way valve is connected to the two second pressure regulating valves, and the other end of the two-position three-way valve is connected to the first pressure regulating valve; The two second pressure regulating valves are arranged at one end of the feedback gas path.

3. The microwave hot air drying device according to claim 2, characterized in that: The pressure regulating module also includes a pressure gauge, a pressure switch and a spiral tube, wherein the spiral tube connects the feedback gas circuit and the gas distributor; the pressure gauge and the pressure switch are arranged on the feedback gas circuit, and the pressure switch is arranged on one end of the feedback gas circuit close to the spiral tube; the pressure gauge is arranged on the end of the feedback gas circuit away from the second pressure regulating valve.

4. The microwave hot air drying device according to claim 1, characterized in that: The hot and cold air switching module also includes a thermocouple for detecting the internal temperature of the heater and a protection switch for cutting off the power supply. The thermocouple is installed in the heater, and a resistance wire for heating is provided in the heater; the protection switch is installed on the outer wall of the heater.

5. The microwave hot air drying device according to claim 1, characterized in that: A first thermal resistor for detecting a supply air temperature is provided between the heater and the gas distributor.

6. The microwave hot air drying device according to claim 1, characterized in that: The microwave drying module also includes a gas-controlled on-off valve, a differential pressure switch for detecting exhaust gas, and a second thermal resistor for detecting exhaust gas temperature. The air intake pipeline is provided with a gas-controlled on-off valve; the exhaust pipeline is provided with the differential pressure switch and the second thermal resistor.

7. The microwave hot air drying device according to claim 6, characterized in that: The microwave drying module also includes a tray for placing the dialyzer and a cylinder, wherein the air inlet pipeline and the air exhaust pipeline are connected to two sides of the tray respectively; the cylinder is arranged outside the drying chamber and connected to the tray, and the cylinder is used to drive the tray to enter and exit the drying chamber.

8. The microwave hot air drying device according to claim 6, characterized in that: The microwave introduction component comprises a magnetron and a microwave power supply, and the magnetron is connected to the microwave power supply via a cable.

9. The microwave hot air drying device according to claim 1, characterized in that: It also includes an exhaust gas treatment module, which includes a steam-water separator, an exhaust fan and a condensate pump. One end of the exhaust pipeline is connected to the steam-water separator, and the exhaust fan and the condensate pump are installed on the steam-water separator.

10. A drying method using a microwave hot air drying device as claimed in any one of claims 1 to 9, characterized in that: A staged drying method was adopted. The first drying stage was microwave hot air combined drying. The microwave power was 5000 W and the drying was performed for 50 seconds. While the microwave introduction component was drying the dialyzer, the gas distributor introduced 0.8 bar cold air into the drying chamber for 50 seconds. The second drying stage is microwave and hot air combined drying, the gas distributor introduces high-pressure hot air at 100°C and 2 bar into the drying chamber for 250 seconds; while the hot air is introduced into the drying chamber, the microwave introduction assembly dries the dialyzer, drying at a microwave power of 3500W for 100 seconds, and then changing to a microwave power of 1500W for 50 seconds; The third drying stage is hot air drying, and the gas distributor introduces 0.8 bar cold air into the drying chamber, and the ventilation time is 10 seconds.

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