Sorting machine

Abstract

The utility model provides a sorting machine, and relates to the technical field of electronic component sorting, the sorting machine provided by the utility model comprises an operation chamber and a drying machine, the operation chamber comprises a pre-warming chamber and a testing chamber, the pre-warming chamber and the testing chamber are both communicated with an air outlet of the drying machine, and the drying machine is used for introducing dry air into the pre-warming chamber and the testing chamber; flow adjusting assemblies are arranged among an air outlet of the dryer, an air inlet of the preheating cavity and an air inlet of the dryer, the dryer has a first state and a second state with different output flows, and the flow adjusting assemblies are used for switching the output flows of the dryer between the first state and the second state. According to the sorting machine provided by the utility model, the waste of dry air is avoided while the prewarming cavity and the testing cavity are not easy to dew in the cooling process, the frosting accumulation caused by external humid air entering the cavities can be avoided, the continuous operation time of equipment is prolonged, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic component sorting, in particular to a sorting machine. Background Art

[0002] After the wafer packaging of integrated circuit electronic components is completed, a series of tests are required to ensure product quality. Some electronic components have special usage requirements and need to be resistant to high and low temperatures. Therefore, during the testing process, it is necessary to simulate the usage environment and apply high and low temperature loads to the electronic components to verify their performance.

[0003] Since the testing time of some electronic components is long, in order to improve production efficiency, multiple stations are often tested at the same time, up to 512 stations or even 1024 stations. Chamber temperature control mode is more suitable for multi-station testing. The principle of chamber temperature control is: establish a sealed chamber, arrange circulating air and temperature control system in it, so that the temperature in the entire chamber is consistent and controllable. Chamber temperature control can preheat and control the temperature of a large number of electronic components at the same time, and the structure is simple. In order to ensure the temperature control accuracy during the test, the electronic components and the carrier tray need to be preheated before the test, so that they can reach the test temperature before entering the test position for testing. During the low-temperature test, the temperature inside the chamber is low, and there is a great risk of frost and condensation inside and outside the chamber. In the cooling stage, the original room temperature humid gas in the chamber will condense dew or ice near the refrigeration components or the circulating fan blades as the temperature decreases, which is easy to cause abnormal operation or damage of the equipment; during the low-temperature operation of the system, electronic components to be tested are continuously transported into the chamber and electronic components that have completed the test are transported out of the chamber. During the transportation process, it is inevitable that external humid air at normal temperature will enter, causing frost and condensation to become more serious.

[0004] Therefore, during the production process, a shorter continuous operation time will be set based on the experience of equipment debugging and operation. When the continuous operation time of the equipment reaches the set value, a warning will be issued, the current production process will be suspended, and the box will be heated and defrosted, resulting in low test efficiency. Utility Model Content

[0005] The utility model aims to provide a sorting machine, which ensures that the pre-temperature chamber and the test chamber are not prone to condensation during the cooling process, avoids the waste of dry air, and can also prevent the external moist air from entering the chamber to cause frost accumulation, thereby extending the continuous operation time of the equipment and improving the detection efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a sorting machine, comprising an operating chamber and a dryer, wherein the operating chamber comprises a pre-temperature chamber and a test chamber, the pre-temperature chamber and the test chamber are both connected to the air outlet of the dryer, and the dryer is used to pass dry air to the pre-temperature chamber and the test chamber;

[0008] A flow regulating component is provided between the air outlet of the dryer, the air inlet of the preheating chamber and the air inlet of the dryer. The dryer has a first state and a second state with different output flow rates. The flow regulating component is used to switch the output flow of the dryer between the first state and the second state.

[0009] Furthermore, the flow regulating component includes a two-position three-way valve and a flow control valve, the air inlet of the two-position three-way valve is connected to the air outlet of the dryer, the first air outlet and the second air outlet of the two-position three-way valve are both connected to the preheating chamber and the test chamber, and the flow control valve is provided between the first air outlet of the two-position three-way valve, the preheating chamber and the test chamber.

[0010] Furthermore, the first air outlet of the two-position three-way valve is connected to the pre-temperature chamber and the test chamber through a first pipeline, and the flow control valve is arranged in the first pipeline;

[0011] The second air outlet of the two-position three-way valve is connected to the pre-temperature chamber and the test chamber through a second pipeline;

[0012] In the first state, both the first pipeline and the second pipeline are connected; in the second state, only the first pipeline is connected and the flow is controlled by the flow control valve.

[0013] Furthermore, the flow control valve is a throttle valve.

[0014] Furthermore, it also includes a three-way joint, a first air inlet of the three-way joint is connected to the air outlet of the flow control valve, a second air inlet of the three-way joint is connected to the second air outlet of the two-position three-way valve, and an air outlet of the three-way joint is connected to the preheating chamber and the test chamber.

[0015] Furthermore, it also includes a main valve, which is arranged between the dryer and the flow regulating component.

[0016] Furthermore, the air pressure in the test chamber is greater than the air pressure in the preheating chamber.

[0017] Furthermore, it also includes a chamber shell and a transmission shaft assembly passing through the chamber shell, the chamber shell has the working chamber, the outer wall of the chamber shell is installed with a bearing sleeve, and the bearing sleeve is sleeved on the outside of the transmission shaft assembly.

[0018] Furthermore, the bearing seat sleeve is provided with an air inlet hole for taking in dry air.

[0019] Furthermore, one end of the bearing sleeve is clearance-matched with the outer circumferential surface of the transmission shaft assembly, and the other end is connected to the chamber housing.

[0020] The sorting machine provided by the utility model can produce the following beneficial effects:

[0021] Before the low-temperature test begins, the dryer works, and the flow regulating component adjusts the dryer output flow to a high flow state. Dry gas enters the preheating chamber and the test chamber through the flow regulating component in large quantities, causing the dew point in the two chambers to drop rapidly. After a period of time, when the dew point in the chamber reaches the equipment operating conditions, the cooling process is started, and the flow regulating component adjusts the dryer output flow to a low flow state to avoid excessive pressure in the chamber during the test. At this time, the electronic components can be tested at a low temperature. During the test, a certain amount of dry air is continuously introduced into the two chambers so that the pressure in the chamber is always greater than the atmospheric pressure.

[0022] Compared with the prior art, the sorting machine provided by the utility model can use different output flow rates to continuously introduce dry gas into the pre-heating chamber and the test chamber before and during operation, reduce the dew point in the chamber, make it difficult to condense during the cooling process, avoid the waste of dry gas and excessive air pressure in the chamber during the test. When the electronic components enter and exit the chamber, the gas flow direction is from the chamber to the external environment, avoiding the external humid air from entering the chamber to cause frost accumulation, extending the continuous operation time of the equipment, and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a sorting machine provided in an embodiment of the utility model;

[0025] Figure 2 A block diagram of the air intake principle of a dryer provided in an embodiment of the utility model;

[0026] Figure 3 A cross-sectional view of the connection between the chamber housing and the transmission shaft assembly provided in an embodiment of the utility model.

[0027] Icons: 1-preheating chamber; 2-test chamber; 3-dryer; 4-flow regulating assembly; 41-two-position three-way valve; 42-throttle valve; 5-three-way connector; 6-nozzle; 7-main valve; 8-chamber housing; 9-drive shaft assembly; 10-bearing seat sleeve; 101-air inlet; 011-insulation layer; 012-reheat chamber; 013-carrying tray; 014-testing machine. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0032] The first aspect of the present invention provides a sorting machine. Figure 1 As shown, it includes an operating chamber and a dryer 3. The operating chamber includes a preheating chamber 1 and a test chamber 2 which are connected to each other. Both the preheating chamber 1 and the test chamber 2 are connected to the air outlet of the dryer 3. The dryer 3 is used to supply dry air to the preheating chamber 1 and the test chamber 2.

[0033] In the sorting machine provided in the above embodiment, a dryer 3 is provided. The dryer 3 can not only pass dry air into the test chamber 2, but also pass dry air into the preheating chamber 1, so as to reduce the dew point of the test chamber 2 and the preheating chamber 1 before the low-temperature test. The above sorting machine can also continue to pass dry air during the low-temperature test. Specifically, during the operation of the equipment, when the electronic components enter and exit the chamber, the dry air will overflow from the chamber, thereby preventing the outside moist air from entering the chamber and causing frost accumulation, which can effectively extend the continuous operation time of the equipment and improve the operation efficiency. Passing dry air into the test chamber and the preheating chamber at the same time can reduce the possibility of the preheating chamber mixing with the outside moist air and entering the test chamber, thereby ensuring the safe operation of the equipment.

[0034] In some embodiments, in order to allow the dry gas to quickly fill the two chambers and avoid excessive air pressure in the chamber, a flow regulating component 4 is provided between the air outlet of the dryer 3, the air inlet of the preheating chamber 1, and the air inlet of the dryer 3. The dryer 3 has a first state and a second state with different output flow rates, and the flow regulating component 4 is used to switch the output flow of the dryer 3 between the first state and the second state.

[0035] Before the low-temperature test begins, the flow regulating component 4 adjusts the output flow of the dryer 3 to a high flow state, and a large amount of dry gas enters the pre-temperature chamber 1 and the test chamber 2 through the flow regulating component 4, so that the dew point of the chamber is rapidly reduced. After a period of time, when the dew point in the chamber reaches the equipment operating conditions, the cooling process is started. At this time, the flow regulating component 4 adjusts the output flow of the dryer 3 to a low flow state, which saves dry gas and avoids excessive air pressure in the chamber during the test.

[0036] In some embodiments, when the test disc enters the test chamber 2, the flow regulating component 4 increases the flow of dry gas entering the test chamber 2, thereby increasing the air pressure in the test chamber 2 and reducing the gas in the preheating chamber 1 entering the test chamber 2, effectively ensuring the concentration of dry gas in the test chamber 2.

[0037] The flow regulating assembly 4 may include a flow regulating valve, or may include other valve body structures, that is, any structure that can adjust the flow of the dry gas entering the preheating chamber 1 and the test chamber 2 may be used.

[0038] In some embodiments, Figure 2 As shown, the flow regulating component 4 includes a two-position three-way valve 41 and a flow control valve. The air inlet of the two-position three-way valve 41 is connected to the air outlet of the dryer 3 to receive the dry gas discharged from the dryer 3. The first air outlet and the second air outlet of the two-position three-way valve 41 are both connected to the preheating chamber 1 and the test chamber 2. A flow control valve is provided between the first air outlet of the two-position three-way valve 41, the preheating chamber 1 and the test chamber 2.

[0039] The two-position three-way valve 41 has two working states. In the first working state, the dry gas discharged from the dryer 3 enters the flow control valve through the two-position three-way valve 41, and the flow control valve reduces the flow of the dry gas and then discharges the dry gas into the preheating chamber 1 and the test chamber 2; in the second working state, the dry gas discharged from the dryer 3 directly enters the preheating chamber 1 and the test chamber 2 through the two-position three-way valve 41, and the flow of the dry gas is relatively large.

[0040] The flow control valve may be a throttle valve 42, which can adjust the flow of the airflow by controlling the size of its own caliber. The flow control valve may also be an overflow valve, and when the flow of the airflow passing through it exceeds a threshold, the airflow will overflow from the overflow valve, thereby controlling the flow in the air path below the threshold.

[0041] In at least one embodiment, the two-position three-way valve 41 is a two-position three-way solenoid valve. In the first working state, the solenoid valve is in an energized state, and in the second working state, the solenoid valve is in a non-energized state.

[0042] On the basis of the above embodiments, specifically, the first air outlet of the two-position three-way valve 41 is connected to the preheating chamber 1 and the test chamber 2 through a first pipe, and the flow control valve is arranged on the first pipe; the second air outlet of the two-position three-way valve 41 is connected to the preheating chamber 1 and the test chamber 2 through a second pipe.

[0043] When the output flow of the dryer 3 is in the first state, only the second pipeline can be connected; or both the first pipeline and the second pipeline can be connected, and the dry gas enters the preheating chamber 1 and the test chamber 2 through the two pipelines respectively, and the flow control valve can be at the maximum opening. When the output flow of the dryer 3 is in the second state, the dry gas enters the preheating chamber 1 and the test chamber 2 only through the first pipeline, and the flow is controlled by the flow control valve on the first pipeline.

[0044] It should be noted that when the output flow of the dryer 3 is in the first state, if it is necessary for both the first pipeline and the second pipeline to be connected, in some other embodiments, the two-position three-way valve 41 can be replaced with a three-way joint. At this time, valves for controlling the connection state of each pipeline can be provided on the first pipeline and the second pipeline.

[0045] In some embodiments, in order to facilitate the transfer of dry gas discharged from the first outlet or the second outlet of the two-position three-way valve 41, the sorting machine also includes a three-way joint 5, the first air inlet of the three-way joint 5 is connected to the outlet of the flow control valve, the second air inlet of the three-way joint 5 is connected to the second outlet of the two-position three-way valve 41, and the outlet of the three-way joint 5 is connected to the preheating chamber 1 and the test chamber 2.

[0046] The dry gas discharged from the flow control valve can enter the three-way joint 5 through the first air inlet of the three-way joint 5 and be discharged to the preheating chamber 1 and the test chamber 2. The dry gas discharged from the second air outlet of the two-position three-way valve 41 can enter the three-way joint 5 through the second air inlet of the three-way joint 5 and be discharged to the preheating chamber 1 and the test chamber 2.

[0047] In some embodiments, Figure 1 and Figure 2 As shown, the sorting machine further includes a nozzle 6 , which is connected to the air outlet of the three-way joint 5 , and the nozzle 6 is arranged in the pre-temperature chamber 1 and the test chamber 2 .

[0048] The nozzle 6 can spray the dry gas in the three-way joint 5 into the preheating chamber 1 and the test chamber 2. One nozzle 6 or multiple nozzles 6 can be provided in each chamber.

[0049] In at least one embodiment, a plurality of nozzles 6 are provided in the preheating chamber 1 and the test chamber 2, and each nozzle 6 can ensure that the dry gas is sprayed into the chamber over a large area, thereby achieving rapid diffusion of the dry gas.

[0050] In some embodiments, Figure 2 As shown, the classifier further includes a main valve 7 , which is arranged between the dryer 3 and the flow regulating component 4 .

[0051] When the main valve 7 is opened, the dryer 3 and the flow regulating component 4 can be connected, and the dry gas can smoothly enter the flow regulating component 4; when the main valve 7 is closed, the dry gas cannot enter the flow regulating component 4, and the dryer 3 stops working.

[0052] The flow regulating assembly 4 can be configured as two, and both flow regulating assemblies 4 are connected to the dryer 3 through the main valve 7. One of the flow regulating assemblies 4 is connected to the nozzle 6 in the preheating chamber 1 through the three-way joint 5, and the other flow regulating assembly 4 is connected to the nozzle 6 in the test chamber 2 through the three-way joint 5, so as to adjust the flow of the dry gas entering the preheating chamber 1 and the test chamber 2 respectively. By making the throttle valves 42 of the two flow regulating assemblies 4 have different openings, the output of the nozzle 6 in the test chamber 2 is controlled to be greater than the output of the nozzle 6 in the preheating chamber 1, so that the air pressure in the test chamber 2 is always greater than the air pressure in the preheating chamber 1, and the air pressure in the preheating chamber 1 is greater than the external air pressure, so as to ensure that the flow direction of the dry gas is from the test chamber 2 to the preheating chamber 1, and from the preheating chamber 1 to the outside.

[0053] At this time, a flow control valve is provided between the first air outlet of the two-position three-way valve 41 in one flow regulating component 4 and the preheating chamber 1, and the second air outlet of the two-position three-way valve 41 is directly connected to the preheating chamber 1; another flow control valve is provided between the first air outlet of the two-position three-way valve 41 in another flow regulating component 4 and the test chamber 2, and the second air outlet of the two-position three-way valve 41 is directly connected to the test chamber 2.

[0054] In some embodiments, at least one of the pre-temperature chamber 1 and the test chamber 2 is provided with a humidity sensor, which can detect the humidity in the chamber. The humidity sensor can be connected to the control system, and when the two-position three-way valve 41 is in the first working state, when the humidity measured by the humidity sensor exceeds the threshold value, the control system controls the two-position three-way valve 41 to switch to the second working state, increasing the flow rate of the dry gas entering the chamber, or the control system controls the opening of the flow control valve to increase the flow rate of the dry gas entering the chamber.

[0055] In at least one embodiment, humidity sensors are provided in the pre-temperature chamber 1 and the test chamber 2. When the humidity measured by any humidity sensor exceeds a threshold value, the control system controls the flow regulating component 4 to increase the dry gas intake flow rate.

[0056] The control system may include a PLC controller. The PLC controller controls the corresponding structural actions based on the detection information, which is a control principle known in the art. Therefore, the control principle between the PLC controller, the humidity sensor and the flow regulating component 4 will not be described in detail here.

[0057] In some embodiments, the sorting machine further includes a chamber housing 8 and a transmission shaft assembly 9 penetrating the chamber housing 8, and the chamber housing 8 has a pre-temperature chamber 1 and a test chamber 2. When in use, part of the transmission shaft assembly 9 in the chamber needs to penetrate the heat insulation layer 011 and the chamber housing 8 to extend to the outside of the chamber housing 8. These transmission shaft assemblies 9 will transfer the low temperature in the chamber to the outside during low-temperature operation, causing frost on the part extending from the chamber housing 8.

[0058] In this regard, in some embodiments, such as Figure 3 As shown, a bearing sleeve 10 is installed on the outer wall of the chamber housing 8 , and the bearing sleeve 10 is sleeved on the outside of the transmission shaft assembly 9 .

[0059] The bearing sleeve 10 can separate the portion of the transmission shaft assembly 9 extending out of the chamber housing 8 from the outside world. The bearing sleeve 10 can be filled with an insulation layer, and the material of the insulation layer can be sponge, so as to prevent the outside air from directly contacting the portion of the transmission shaft assembly 9 extending out of the chamber housing 8.

[0060] In some other embodiments, preferably, the bearing sleeve 10 is not filled with a heat-insulating layer, and an air inlet 101 for introducing dry air is provided on the bearing sleeve 10. The introduction of dry air into the bearing sleeve 10 can reduce the dew point of the central axis of the transmission shaft assembly 9 and the environment near the bearing seat, so that the transmission shaft assembly 9 is not easy to condense.

[0061] The dry gas leading to the bearing sleeve 10 can be hot dry gas, which can increase the surface convection heat transfer coefficient of the transmission shaft assembly 9, increase the surface temperature of the transmission shaft assembly 9, and make it less likely to condense.

[0062] In some embodiments, to facilitate the discharge of dry gas in the bearing sleeve 10 , one end of the bearing sleeve 10 is clearance-matched with the outer circumference of the shaft in the transmission shaft assembly 9 , and the other end is connected to the chamber housing 8 .

[0063] When in use, the dry air is heated to 80° C. by an air heater, enters the bearing sleeve 10 from the air inlet 101 , heats the internal environment, the shaft and the bearing seat, and then flows out from the gap between the bearing sleeve 10 and the shaft.

[0064] like Figure 1 As shown, the operation chamber also includes a temperature return chamber 012, and the test chamber 2 is located between the pre-temperature chamber 1 and the temperature return chamber 012. The pre-temperature chamber 1 is provided with a heating / cooling temperature control system, and the carrier trays 013 and the electronic components are heated / cooled to the test temperature in the pre-temperature chamber 1. After the test of the previous batch of electronic components is completed, the lateral movement device drags the two carrier trays 013 into the test chamber 2, and at the same time transfers the previous batch of electronic components tested by the test machine 014 to the temperature return chamber 012.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A sorting machine, characterized in that: The invention comprises an operating chamber and a dryer (3), wherein the operating chamber comprises a preheating chamber (1) and a test chamber (2), wherein the preheating chamber (1) and the test chamber (2) are both connected to an air outlet of the dryer (3), and the dryer (3) is used to pass dry air to the preheating chamber (1) and the test chamber (2); A flow regulating component (4) is provided between the air outlet of the dryer (3), the air inlet of the pre-heating chamber (1) and the air inlet of the dryer (3); the dryer (3) has a first state and a second state with different output flow rates; the flow regulating component (4) is used to switch the output flow rate of the dryer (3) between the first state and the second state.

2. The sorting machine according to claim 1, characterized in that: The flow regulating assembly (4) comprises a two-position three-way valve (41) and a flow control valve; the air inlet of the two-position three-way valve (41) is connected to the air outlet of the dryer (3); the first air outlet and the second air outlet of the two-position three-way valve (41) are both connected to the pre-heating chamber (1) and the test chamber (2); and the flow control valve is provided between the first air outlet of the two-position three-way valve (41), the pre-heating chamber (1) and the test chamber (2).

3. The sorting machine according to claim 2, characterized in that: The first air outlet of the two-position three-way valve (41) is connected to the preheating chamber (1) and the test chamber (2) through a first pipeline, and the flow control valve is arranged in the first pipeline; The second air outlet of the two-position three-way valve (41) is connected to the preheating chamber (1) and the test chamber (2) through a second pipeline; In the first state, both the first pipeline and the second pipeline are connected; in the second state, only the first pipeline is connected and the flow is controlled by the flow control valve.

4. The sorting machine according to claim 2, characterized in that: The flow control valve is a throttle valve (42).

5. The sorting machine according to claim 2, characterized in that: It also comprises a three-way joint (5), wherein a first air inlet of the three-way joint (5) is connected to an air outlet of the flow control valve, a second air inlet of the three-way joint (5) is connected to a second air outlet of the two-position three-way valve (41), and an air outlet of the three-way joint (5) is connected to the preheating chamber (1) and the test chamber (2).

6. The sorting machine according to claim 2, characterized in that: It also comprises a main valve (7), wherein the main valve (7) is arranged between the dryer (3) and the flow regulating component (4).

7. The sorting machine according to any one of claims 1 to 6, characterized in that: The air pressure in the test chamber (2) is greater than the air pressure in the preheating chamber (1).

8. The sorting machine according to any one of claims 1 to 6, characterized in that: It also includes a chamber shell (8) and a transmission shaft assembly (9) that passes through the chamber shell (8), the chamber shell (8) having the working chamber, and the outer wall of the chamber shell (8) is installed with a bearing sleeve (10), and the bearing sleeve (10) is sleeved on the outside of the transmission shaft assembly (9).

9. The sorting machine according to claim 8, characterized in that: The bearing seat sleeve (10) is provided with an air inlet hole (101) for taking in dry air.

10. The sorting machine according to claim 8, characterized in that: One end of the bearing seat sleeve (10) is clearance-matched with the outer peripheral surface of the transmission shaft assembly (9), and the other end is connected to the chamber housing (8).

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