Test method and apparatus for testing the flow capacity of a dryer medium

Abstract

The application provides a test method and device for testing the flow capacity of a drying machine, and relates to the field of drying machine performance testing. The method comprises the following steps: starting the drying machine to be tested, and feeding test medium into the medium flow channel of the drying machine to be tested through a medium inlet; when the test medium is discharged from the outlet of the medium flow channel, the test medium is fed into the medium flow channel at an inlet flow rate, and the inlet flow rate is not less than the maximum inlet flow rate allowed by the drying machine to be tested, which is the design flow rate; when the discharge flow rate of the medium flow channel reaches a stable state, the discharge flow rate of the test medium discharged from the medium outlet is tested; and the discharge flow rate of the test medium is compared with the design flow rate. The device comprises an inlet flow device, an inlet flow rate detection device and a discharge flow rate detection device, the inlet flow device is connected with the inlet flow rate detection device, and the inlet flow rate detection device is in communication with the medium inlet. The device can ensure the production capacity of the drying machine and the normal operation of the production line.

Description

Technical Field

[0001] This invention relates to the field of dryer performance testing technology, and in particular to a test method and apparatus for testing the flow capacity of the working medium in a dryer. Background Technology

[0002] A conductive heat transfer dryer is an indirect heating type of dryer that can use various working media, such as a steam tube rotary dryer. It can use steam, hot water, or thermal oil as the working medium. Steam enters the heat exchanger (such as heat exchange tubes) through the dryer's steam inlet, indirectly exchanging heat with the materials inside the dryer and outside the heat exchanger via the side walls of the heat exchanger. The condensed steam (condensate) is discharged through the working medium outlet. During dryer operation, the amount of working medium, including condensed steam, can reach several tons to tens of tons. If the working medium discharge is obstructed, the entry of high-temperature working media such as steam will be blocked, preventing sufficient high-temperature working medium for heat exchange and causing the dryer's capacity to fall short of design requirements. Therefore, the structural design of the working medium flow channel in the dryer is crucial for ensuring its capacity. Currently, there are no experimental methods or devices for testing the working medium flow capacity of a dryer. Summary of the Invention

[0003] The purpose of this invention is to provide a test method and apparatus for testing the flow capacity of the working medium in a dryer, so as to solve the problems existing in the prior art. It can verify the flow capacity of the working medium in the flow channel of the dryer before the dryer is put into industrial application, ensure that the structure of the flow channel of the dryer can meet the design requirements, thereby ensuring the production capacity of the dryer and ensuring the normal operation of the production line.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a test method for testing the flow capacity of the working medium in a dryer, comprising the following steps:

[0006] S1: Turn on the dryer to be tested and transport the test medium through the medium inlet of the dryer to the medium flow channel of the dryer to be tested;

[0007] S2: When the test medium is discharged from the medium outlet of the medium flow channel, the test medium is continuously supplied to the medium flow channel at an inlet flow rate, and the inlet flow rate of the test medium is not less than the maximum inlet flow rate allowed by the dryer under test, where the maximum inlet flow rate allowed by the dryer under test is the design flow rate of the inlet flow rate of the dryer under test; after the discharge flow rate of the medium flow channel reaches a stable state, the discharge flow rate of the test medium discharged from the medium outlet is tested;

[0008] S3: Compare the discharge flow rate and the design flow rate of the test medium within the same test cycle.

[0009] Preferably, S2 includes: performing multiple tests on the discharge flow rate of the test medium within the same test cycle and obtaining multiple sets of test values, and obtaining the average flow rate of the test medium through the multiple sets of test values;

[0010] S3 includes: comparing the average flow rate of the test medium with the design flow rate within the same test cycle; if the average flow rate of the test medium is less than the design flow rate, it is determined that the structural design of the medium flow channel does not meet the requirements; if the average flow rate of the test medium is not less than the design flow rate, it is determined that the structural design of the medium flow channel meets the requirements.

[0011] Preferably, S2 includes: the inlet flow rate of the test medium is equal to the design flow rate.

[0012] Preferably, S2 further includes: the test medium flowing out of the medium outlet can flow back to the medium inlet and enter the medium flow channel through the medium inlet; when the inlet flow rate is greater than the outlet flow rate and the liquid level of the test medium in the dryer under test is higher than the overflow port of the dryer under test, the test medium is discharged from the overflow port.

[0013] The present invention also provides a test apparatus for testing the flow capacity of the working medium of a dryer, comprising a liquid inlet device, a liquid inlet flow detection device, and a liquid outlet flow detection device. The liquid inlet device is connected to the liquid inlet of the liquid inlet flow detection device, and the liquid outlet of the liquid inlet flow detection device is used to communicate with the medium inlet of the medium flow channel of the dryer to be tested. The liquid inlet device can deliver the test medium into the medium flow channel through the liquid inlet flow detection device. The liquid inlet flow detection device is used to detect the liquid inlet flow rate of the test medium entering the medium flow channel, and the liquid outlet flow detection device is used to detect the liquid outlet flow rate of the test medium flowing out of the medium outlet of the medium flow channel.

[0014] Preferably, the liquid inlet device includes a pump body device, the outlet of the pump body device is connected to the inlet of the liquid inlet flow detection device, and the pump body device is capable of delivering the test medium into the medium flow channel at a constant flow rate.

[0015] Preferably, the pump body device can adjust the inlet flow rate of the test medium into the medium flow channel and make the test medium enter the medium flow channel at a set inlet flow rate.

[0016] Preferably, the test apparatus for testing the flow capacity of the working medium of a dryer provided by the present invention further includes a first valve, a main pipe, and a bypass pipe. The inlet of the main pipe is connected to the outlet of the pump body device, the outlet of the main pipe is connected to the inlet of the inlet flow detection device, and the inlet of the bypass pipe is connected to the outlet on the side wall of the main pipe. The first valve is disposed on the bypass pipe, and a portion of the test medium pumped by the pump body device can be discharged from the bypass pipe through the first valve. The flow rate of the test medium pumped by the pump body device to the inlet flow detection device can be adjusted by adjusting the opening of the first valve.

[0017] Preferably, the test device for testing the flow capacity of the working medium of the dryer provided by the present invention further includes a second valve, the inlet of the second valve being connected to the outlet of the pump body device, the outlet of the second valve being connected to the inlet of the inlet flow detection device, and the bypass pipe being connected to the main pipe between the second valve and the pump body device, which can adjust the flow rate of the test medium pumped by the pump body device to the inlet flow detection device by adjusting the opening size of the first valve and the second valve.

[0018] Preferably, the test apparatus for testing the flow capacity of the working medium of a dryer provided by the present invention further includes a test medium storage device. The liquid inlet device is connected to the test medium storage device, and the liquid inlet device can transport the test medium in the test medium storage device to the medium flow channel. The outlet of the liquid discharge flow detection device is connected to the test medium storage device, and the test medium discharged from the medium outlet can be returned to the test medium storage device through the liquid discharge flow detection device.

[0019] The outlet of the bypass pipe is connected to the test medium storage device, and a portion of the test medium pumped by the pump body can be discharged from the bypass pipe to the test medium storage device through the first valve.

[0020] The present invention achieves the following technical effects compared to the prior art:

[0021] The present invention provides a test method and apparatus for testing the flow capacity of the working medium in a dryer. The test medium is fed into the flow channel from the inlet and flows out from the outlet, obtaining the discharge flow rate of the test medium after it reaches a stable discharge state. The discharge flow rate of the test medium within the same test cycle is compared with the design flow rate. If the discharge flow rate is less than the design flow rate, the structural design of the flow channel is deemed unsatisfactory; if the discharge flow rate is not less than the design flow rate, the structural design of the flow channel is deemed satisfactory. The test method and apparatus provided by the present invention can verify the flow capacity of the test medium in the flow channel of a dryer before it is put into industrial application, ensuring that the structure of the flow channel meets the design requirements, thereby guaranteeing the dryer's production capacity and the normal operation of the production line. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the test device for testing the flow capacity of the working medium in the dryer in Example 2;

[0024] In the diagram: 100, Test apparatus for testing the working medium flow capacity of the dryer; 1, Dryer to be tested; 101, Medium inlet; 102, Medium flow channel; 103, Medium outlet; 2, Liquid inlet device; 201, Pump body device; 3, Liquid inlet flow detection device; 4, Liquid outlet flow detection device; 5, First valve; 6, Main pipe; 7, Bypass pipe; 8, Second valve; 9, Test medium storage device; 901, First storage device; 902, Second storage device; 10, Exhaust valve; 11, Overflow valve. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The purpose of this invention is to provide a test method and apparatus for testing the flow capacity of the working medium in a dryer, so as to solve the problems existing in the prior art. It can verify the flow capacity of the working medium in the flow channel of the dryer before the dryer is put into industrial application, ensure that the structure of the flow channel of the dryer can meet the design requirements, thereby ensuring the production capacity of the dryer and ensuring the normal operation of the production line.

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] like Figure 1 As shown, this embodiment provides a test method for testing the flow capacity of the working medium in a dryer, including the following steps:

[0030] S1: Turn on the dryer to be tested 1 and transport the test medium through the medium inlet 101 of the dryer to be tested 1 to the medium flow channel 102 of the dryer to be tested 11.

[0031] S2: When test medium is discharged from the medium outlet 103 of the medium flow channel 102, the test medium is continuously supplied to the medium flow channel 102 at a constant inlet flow rate, and the inlet flow rate of the test medium is not less than the maximum inlet flow rate allowed by the dryer 1 under test. The maximum inlet flow rate allowed by the dryer 1 under test is the design flow rate of the inlet flow rate of the dryer 1 under test. After the discharge flow rate of the medium flow channel 102 reaches a stable state, the discharge flow rate of the test medium discharged from the medium outlet 103 is tested. It should be noted that the flow rate is the amount of fluid flowing through the cross-section of the pipe per unit time. When the variation range of the test value of the discharge flow rate is within 2%, it can be considered that the flow of the test medium in the medium flow channel 102 has reached a stable state.

[0032] S3: Compare the discharge flow rate of the test medium with the design flow rate within the same test cycle. If the discharge flow rate of the test medium is less than the design flow rate, it is determined that the structural design of the medium flow channel 102 does not meet the requirements; if the discharge flow rate of the test medium is not less than the design flow rate, it is determined that the structural design of the medium flow channel 102 meets the requirements, that is, when the dryer's drainage capacity is greater than or equal to the design value, it meets the requirements. It should be noted that the discharge flow rate of the test medium may be greater than the design flow rate only when the inlet flow rate is greater than the design flow rate. In this case, the dryer's drainage capacity exceeds the design requirements, which also meets the requirements. When comparing the discharge flow rate of the test medium with the design flow rate, the detection errors of the inlet flow rate detection device 3 and the discharge flow rate detection device 4 are ignored.

[0033] The above method can verify the flow capacity of the test medium in the flow channel of the dryer before it is put into industrial application, ensuring that the structure of the flow channel of the dryer can meet the design requirements, thereby ensuring the production capacity of the dryer and the normal operation of the production line.

[0034] In a preferred embodiment, S2 further includes: when the inlet flow rate is greater than the outlet flow rate and the liquid level of the test medium in the dryer 1 under test is higher than the overflow port of the dryer 1 under test, the test medium is discharged from the overflow port. Before introducing the test medium into the dryer 1 under test, the overflow valve 11 on the dryer 1 under test is opened. When the flow capacity of the dryer 1 under test does not meet the requirements, excess test medium that cannot be discharged through the medium outlet 103 can flow out through the overflow valve 11; or when the inlet flow rate pumped by the inlet device 2 into the medium flow channel 102 is greater than the design flow rate, excess test medium can flow out through the overflow valve 11 to avoid damaging the dryer 1 under test.

[0035] As a preferred embodiment, before introducing the test medium into the dryer 1 to be tested, the exhaust valve 10 on the dryer 1 to be tested is opened to ensure the air pressure balance inside and outside the dryer 1 to be tested.

[0036] In a preferred embodiment, S2 includes: performing multiple tests on the discharge flow rate of the test medium within the same test cycle and obtaining multiple sets of test values, and obtaining the average flow rate of the test medium through the multiple sets of test values;

[0037] S3 includes: comparing the average flow rate of the test medium with the design flow rate within the same test cycle. If the average flow rate of the test medium is less than the design flow rate, it is determined that the structural design of the medium flow channel 102 does not meet the requirements; if the average flow rate of the test medium is not less than the design flow rate, it is determined that the structural design of the medium flow channel 102 meets the requirements. Using the average flow rate as the basis for judgment helps improve the accuracy of the test. Preferably, a discharge flow rate is obtained every 2 to 5 minutes, and the average value of the three discharge flow rates is taken.

[0038] In a preferred embodiment, S2 includes: the inlet flow rate of the test medium is equal to the design flow rate, so that the test medium simulates the flow process of the working medium in the medium flow channel 102 more closely resembles the actual working state, thereby improving the accuracy of the test. Different models or specifications of the dryer 1 under test have different design values ​​for the inlet flow rate; therefore, different inlet flow rates can be used for different dryers 1 under test. Preferably, before the test medium reaches a stable discharge state, the flow rate of the test medium entering the medium flow channel 102 can be greater than the inlet flow rate, so that the test medium quickly reaches a stable discharge state.

[0039] In a preferred embodiment, S2 further includes: the test medium flowing out of the medium outlet 103 can flow back to the medium inlet 101 and enter the medium flow channel 102 through the medium inlet 101. This achieves the recycling of the test medium and reduces testing costs.

[0040] Example 2

[0041] like Figure 1 As shown, this embodiment provides a test device 100 for testing the flow capacity of the working medium in a dryer, including a liquid inlet device 2, a liquid inlet flow detection device 3, and a liquid outlet flow detection device 4. Preferably, both the liquid inlet flow detection device 3 and the liquid outlet flow detection device 4 are flow meters. The liquid inlet device 2 is connected to the inlet of the liquid inlet flow detection device 3, and the outlet of the liquid inlet flow detection device 3 is used to communicate with the medium inlet 101 of the medium flow channel 102 of the dryer to be tested. The liquid inlet device 2 can deliver the test medium into the medium flow channel 102 through the liquid inlet flow detection device 3. The liquid inlet flow detection device 3 is used to detect the inlet flow rate of the test medium entering the medium flow channel 102, and the liquid outlet flow detection device 4 is used to detect the outlet flow rate of the test medium flowing out of the medium outlet 103 of the medium flow channel 102. By delivering the test medium into the medium flow channel 102 through the medium inlet 101, ensuring that the inlet flow rate of the test medium is not less than the design flow rate, and allowing it to flow out through the medium outlet 103 of the medium flow channel 102, the outlet flow rate of the test medium after reaching a stable discharge state is detected. The discharge flow rate of the test medium within the same test cycle is compared with the design flow rate. If the discharge flow rate of the test medium is less than the design flow rate, it is determined that the structural design of the medium flow channel 102 does not meet the requirements; if the discharge flow rate of the test medium is not less than the design flow rate, it is determined that the structural design of the medium flow channel 102 meets the requirements. The test method and apparatus for testing the flow capacity of the working medium of a dryer provided by this invention can verify the flow capacity of the test medium in the flow channel of the dryer before the dryer is put into industrial application, ensuring that the structure of the flow channel of the dryer can meet the design requirements, thereby ensuring the production capacity of the dryer and the normal operation of the production line.

[0042] The liquid inlet device 2 includes a pump body device 201, the outlet of which is connected to the inlet of the liquid inlet flow detection device 3. The pump body device 201 can deliver the test medium into the medium flow channel 102 at a constant flow rate. The pump body device 201 is a water pump.

[0043] In a preferred embodiment, the pump body device 201 can adjust the inlet flow rate of the test medium into the medium flow channel 102, ensuring that the test medium enters the medium flow channel 102 at a set inlet flow rate. The pump body device 201 is preferably a variable frequency pump, which can change the output liquid flow rate of the pump body device 201 by changing its rotational speed. This allows for testing of different dryer models, enabling all models to be tested at the designed flow rate, facilitating control and adjustment.

[0044] In a preferred embodiment, the test apparatus 100 for testing the flow capacity of the working medium of the dryer provided in this embodiment further includes a first valve 5, a main pipe 6, and a bypass pipe 7. The inlet of the main pipe 6 is connected to the outlet of the pump body device 201, and the outlet of the main pipe 6 is connected to the inlet of the inlet flow detection device 3. The inlet of the bypass pipe 7 is connected to the outlet on the side wall of the main pipe 6. The first valve 5 is disposed on the bypass pipe 7. Part of the test medium pumped by the pump body device 201 can be discharged from the bypass pipe 7 through the first valve 5. The flow rate of the test medium pumped by the pump body device 201 to the inlet flow detection device 3 can be adjusted by adjusting the opening of the first valve 5. Adjusting the inlet flow rate through the first valve 5 helps to reduce the test cost.

[0045] The test apparatus 100 for testing the flow capacity of the working medium in a dryer provided in this embodiment also includes a second valve 8. The inlet of the second valve 8 is connected to the outlet of the pump body device 201, and the outlet of the second valve 8 is connected to the inlet of the inlet flow detection device 3. A bypass pipe 7 is connected to the main pipe 6 between the second valve 8 and the pump body device 201. The flow rate of the test medium pumped by the pump body device 201 to the inlet flow detection device 3 can be adjusted by adjusting the opening of the first valve 5 and the second valve 8. The first valve 5 and the second valve 8 are preferably manual valves, which can be manually adjusted. During the adjustment process, the reading of the inlet flow detection device 3 is observed. When the reading is equal to the required inlet flow rate for the test, the adjustment is stopped. Using the first valve 5 and the second valve 8 as the method of flow rate adjustment helps to reduce costs, and the accuracy of adjustment is improved by adjusting both valves together. Preferably, during testing, the second valve 8 can be fully opened and the first valve 5 can be fully closed first, allowing the test medium to enter the medium flow channel 102 and be discharged for a period of time until the test medium reaches a stable discharge state. Then, the opening degree of the first valve 5 and the second valve 8 can be adjusted according to the required liquid flow rate for testing. For example, the opening degree of the second valve 8 can be adjusted to 50%, and the first valve 5 can be slightly opened (for example, the opening degree can be adjusted to 20%).

[0046] The test apparatus 100 for testing the flow capacity of the working medium of a dryer provided in this embodiment also includes a test medium storage device 9. The liquid inlet device 2 is connected to the test medium storage device 9, and the liquid inlet device 2 can transport the test medium in the test medium storage device 9 to the medium flow channel 102. The outlet of the drain flow detection device 4 is connected to the test medium storage device 9, and the test medium discharged from the medium outlet 103 can be returned to the test medium storage device 9 through the drain flow detection device 4; thus realizing the recycling of the test medium and reducing the test cost.

[0047] The outlet of the bypass pipe 7 is connected to the test medium storage device 9. A portion of the test medium pumped by the pump body device 201 can be discharged from the bypass pipe 7 to the test medium storage device 9 through the first valve 5. This enables the recycling of the test medium and reduces testing costs.

[0048] In a preferred embodiment, the test medium storage device 9 includes a first storage device 901 and a second storage device 902. The inlet of the first storage device 901 is connected to the outlet of the drain flow detection device 4, the inlet of the inlet device 2 is connected to the outlet of the second storage device 902, and the outlet of the bypass pipe 7 is connected to either the inlet of the first storage device 901 or the inlet of the second storage device 902. An overflow port is provided above the upper inlet of the second storage device 902 and is connected to the upper inlet of the second storage device 902. The height of the overflow port is higher than the height of the upper inlet of the second storage device 902. The test medium discharged from the outlets of the drain flow detection device 4 and the bypass pipe 7 can first enter the first storage device 901. When the water level in the first storage device 901 reaches the height of the overflow port, the test medium can automatically flow from the first storage device 901 to the second storage device 902 under the action of gravity. The first storage device 901 can buffer the discharged test medium to ensure stable pressure at the inlet side of the liquid inlet device 2. Preferably, the initial water level of the test medium in the second storage device 902 is 80% of the height of the second storage device 902, and the test medium is water.

[0049] The test method and apparatus for testing the flow capacity of working media in a dryer provided by this invention are applicable to various types of dryers, such as steam pipe rotary dryers and paddle dryers, and are used for testing dryers with multiple working media, such as steam and hot water.

[0050] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A test method for testing the flow capacity of the working medium in a dryer, characterized in that: Includes the following steps: S1: Turn on the dryer to be tested and transport the test medium through the medium inlet of the dryer to the medium flow channel of the dryer to be tested; S2: When the test medium is discharged from the medium outlet of the medium flow channel, the test medium is continuously supplied to the medium flow channel at the inlet flow rate, and the inlet flow rate of the test medium is not less than the maximum inlet flow rate allowed by the dryer under test, wherein the maximum inlet flow rate allowed by the dryer under test is the design flow rate of the inlet flow rate of the dryer under test. Once the discharge flow rate of the medium flow channel reaches a stable state, the discharge flow rate of the test medium discharged from the medium outlet is tested; the discharge flow rate of the test medium within the same test cycle is tested multiple times and multiple sets of test values ​​are obtained, and the average flow rate of the test medium is obtained through the multiple sets of test values. S3: Compare the discharge flow rate and the design flow rate of the test medium within the same test cycle; The average flow rate of the test medium within the same test cycle is compared with the design flow rate. If the average flow rate of the test medium is less than the design flow rate, it is determined that the structural design of the medium flow channel does not meet the requirements. If the average flow rate of the test medium is not less than the design flow rate, then the structural design of the medium flow channel is deemed to meet the requirements.

2. The test method for testing the flow capacity of the working medium in a dryer according to claim 1, characterized in that: S2 includes: The influent flow rate of the test medium is equal to the design flow rate.

3. The test method for testing the flow capacity of the working medium in a dryer according to claim 1, characterized in that: S2 further includes: the test medium flowing out of the medium outlet can flow back to the medium inlet and enter the medium flow channel through the medium inlet; when the inlet flow rate is greater than the outlet flow rate and the liquid level of the test medium in the dryer under test is higher than the overflow port of the dryer under test, the test medium is discharged from the overflow port.

4. A test apparatus for testing the flow capacity of the working medium in a dryer, characterized in that: The test method for testing the flow capacity of the working medium of a dryer according to any one of claims 1 to 3 is used to conduct a test on the flow capacity of the working medium of the dryer. The test apparatus for testing the flow capacity of the working medium of the dryer includes a liquid inlet device, a liquid inlet flow detection device, and a liquid outlet flow detection device. The liquid inlet device is connected to the liquid inlet of the liquid inlet flow detection device, and the liquid outlet of the liquid inlet flow detection device is used to communicate with the medium inlet of the medium flow channel of the dryer to be tested. The liquid inlet device can deliver the test medium into the medium flow channel through the liquid inlet flow detection device. The liquid inlet flow detection device is used to detect the liquid inlet flow rate of the test medium entering the medium flow channel, and the liquid outlet flow detection device is used to detect the discharge flow rate of the test medium flowing out of the medium outlet of the medium flow channel. The liquid inlet device includes a pump body device, the outlet of which is connected to the inlet of the liquid inlet flow detection device, and the pump body device is capable of delivering the test medium into the medium flow channel at a constant flow rate. It also includes a first valve, a main pipe, and a bypass pipe. The inlet of the main pipe is connected to the outlet of the pump body device, and the outlet of the main pipe is connected to the inlet of the inlet flow detection device. The inlet of the bypass pipe is connected to the outlet on the side wall of the main pipe. The first valve is installed on the bypass pipe. A portion of the test medium pumped by the pump body device can be discharged from the bypass pipe through the first valve. The flow rate of the test medium pumped by the pump body device to the inlet flow detection device can be adjusted by adjusting the opening of the first valve.

5. The test apparatus for testing the flow capacity of the working medium in a dryer according to claim 4, characterized in that: The pump body device can adjust the inlet flow rate of the test medium into the medium flow channel and make the test medium enter the medium flow channel at a set inlet flow rate.

6. The test apparatus for testing the flow capacity of the working medium in a dryer according to claim 4, characterized in that: It also includes a second valve, the inlet of which is connected to the outlet of the pump body device, and the outlet of the second valve is connected to the inlet of the inlet flow detection device. The bypass pipe is connected to the main pipe between the second valve and the pump body device, and the flow rate of the test medium pumped by the pump body device to the inlet flow detection device can be adjusted by adjusting the opening of the first valve and the opening of the second valve.

7. The test apparatus for testing the flow capacity of the working medium in a dryer according to claim 6, characterized in that: It also includes a test medium storage device, the liquid inlet device is connected to the test medium storage device, and the liquid inlet device can transport the test medium in the test medium storage device to the medium flow channel. The outlet of the drain flow detection device is connected to the test medium storage device, and the test medium discharged from the medium outlet can flow back to the test medium storage device through the drain flow detection device. The outlet of the bypass pipe is connected to the test medium storage device, and a portion of the test medium pumped by the pump body can be discharged from the bypass pipe to the test medium storage device through the first valve.

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