Automatic detection equipment and method for water hydrant
By providing automatic water bolt detection equipment and using automated testing and cleaning mechanisms, the existing water bolt detection relies on manual operation is solved, and the detection efficiency and safety are improved.
Patent Information
- Application Number
- CN202411449045.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-02-11
AI Technical Summary
The inspection process of existing water duct products is all manually operated, resulting in problems such as low detection efficiency and high labor intensity.
Provides an automatic detection device for water ducts, including a testing mechanism and a cleaning mechanism. The testing mechanism provides the product to be tested with a corresponding test medium through the first test path and/or the second test path, and automatically controls the detection process through the control mechanism. The cleaning mechanism is used to eliminate residual test media after the test is completed.
The automation of water duct detection has been realized, the detection efficiency has been improved, manual intervention has been reduced, and labor intensity has been reduced.
Smart Images

Figure CN119413445A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of equipment testing, and in particular to an automatic water faucet detection device and method. Background Art
[0002] Faucet products (such as faucets, ordinary shower heads, constant temperature shower heads, etc.) need to undergo multiple tests before leaving the factory to ensure product quality and prevent unqualified products from leaving the factory and entering the hands of users, thereby protecting customer interests and corporate reputation.
[0003] The testing contents of faucet products mainly include testing operating performance, hot and cold water wall insulation performance, water discharge status, sealing performance, flow rate, flow uniformity and water efficiency level, etc. The existing testing method is manual operation testing. Taking the testing of sealing performance as an example, the general operating steps of the test are as follows: connect the tested product to the test pipeline, manually open the water supply valve handle on the pipeline, turn on the inverter, and let the delivery pump supply water to the tested product. Adjust the water pressure by adjusting the knob on the inverter. When the water pressure reaches the specified range, stop adjusting the knob, start timing, and perform pressure maintenance testing to observe whether the tested product has water leakage. After the counted time is reached, turn off the inverter and close the water supply valve.
[0004] The above-mentioned sealing performance testing process is all manually operated, and other testing contents also require workers to perform corresponding operations, resulting in problems such as low testing efficiency and high labor intensity.
[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention
[0006] In view of the above situation, the present invention provides an automatic faucet detection device, aiming to solve the technical problems that the detection process of existing faucet products is entirely manually operated, with low detection efficiency and high labor intensity.
[0007] To achieve the above object, the present invention provides the following technical solutions: In a first aspect, the present invention provides a water faucet automatic detection device, comprising: The testing mechanism comprises a first testing path and / or a second testing path; the first testing path is used to provide a first testing medium to the tested product; the second testing path is used to provide a second testing medium to the tested product; the temperature of the second testing medium is higher than the temperature of the first testing medium; A cleaning mechanism, used to eliminate the first test medium and / or the second test medium remaining in the tested product after the test is completed; The control mechanism is used to control the on / off of the first test path, the on / off of the second test path, and / or the working state of the cleaning mechanism.
[0008] In some embodiments of the present invention, the first test path includes connected: a first storage container, for storing a first test medium; The first test end connector is used to connect to the product under test.
[0009] In some embodiments of the present invention, the first test path further includes a first flow meter, a first pressure sensor and / or a first liquid level sensor; The first flow meter is used to detect the flow of the first test medium in the first test path; The first pressure sensor is used to detect the pressure of the first test medium in the first test path; The first liquid level sensor is used to detect the liquid level of the first test medium in the first storage container.
[0010] In some embodiments of the present invention, the second test path mainly includes the connected: a second storage container for storing a second test medium; The second test end connector is used to connect to the product under test.
[0011] In some embodiments of the present invention, the second test path further includes a second flow meter, a second pressure sensor, a second liquid level sensor and / or a temperature sensor; The second flow meter is used to detect the flow of the second test medium in the second test path; The second pressure sensor is used to detect the pressure of the second test medium in the second test path; The second liquid level sensor is used to detect the liquid level of the second test medium in the second storage container; The temperature sensor is used to detect the temperature of the second test medium in the second storage container.
[0012] In some embodiments of the present invention, a temperature regulating component is disposed in the second storage container.
[0013] In some embodiments of the present invention, a first receiving container and / or a second receiving container are further included; The first receiving container is used to collect the first test medium after use; The second receiving container is used to collect the second test medium after use, or is used to collect the first test medium and the second test medium after use.
[0014] In some embodiments of the present invention, a recovery pipe is further included, and the recovery pipe is used to recover the used first test medium into the first storage container.
[0015] In some embodiments of the present invention, the cleaning mechanism comprises an air blowing path, and the first test path and / or the second test path are connected to the air blowing path.
[0016] In a second aspect, the present invention provides a method for automatically detecting a faucet, comprising: Connecting the product under test to the first test path and / or the second test path, and providing the first test medium and / or the second test medium to the product under test; Making the pressure in the first test path and / or the second test path reach a prescribed pressure range; Start timing and conduct pressure maintenance test to check whether the product under test has water leakage; After a first predetermined time is reached, closing the first test path and / or the second test path; The first test medium and / or the second test medium remaining in the tested product is eliminated by the cleaning mechanism.
[0017] The embodiments of the present invention have at least the following advantages or beneficial effects: 1. Provide the first test medium or the second test medium to the tested product (water faucet) through the first test path and / or the second test path to facilitate corresponding testing.
[0018] Second, the first test medium and / or the second test medium remaining in the tested product is eliminated by the cleaning mechanism after the test is completed, so as to clean the tested product and facilitate subsequent processes such as packaging of the tested product.
[0019] 3. By controlling the on / off of the first test path, the on / off of the second test path, and / or the working state of the cleaning mechanism through the control mechanism, corresponding detection can be automatically performed, thus reducing manual intervention.
[0020] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0022] Figure 1 The structure diagram of the water faucet automatic detection equipment Figure 1 ; Figure 2 The structure diagram of the water faucet automatic detection equipment Figure 2 ; Figure 3 The structure diagram of the water faucet automatic detection equipment Figure 3 ; Figure 4 It is a structural schematic diagram of the first test path, the second test path (excluding the first test end connector and the second test end connector), and the backflush path; Figure 5 for Figure 4 A structural diagram from another perspective; Figure 6 for Figure 4 A schematic diagram of the structure of the second test path; Figure 7 for Figure 4 A schematic diagram of the structure of the first test path; Figure 8 This is a schematic diagram of the recovery pipeline structure.
[0023] icon: 1-first test path, 11-first storage container, 111-first replenishing pipe, 112-first storage container water inlet valve, 12-first test end connector, 13-first storage container liquid outlet valve, 14-first test end valve, 15-first delivery pump, 16-first flow meter, 17-first pressure sensor, 18-first liquid level sensor, 2-second test path, 21-second storage container, 211-second replenishing pipe, 212-second storage container water inlet valve, 213-heat exchange pipeline, 214-heat exchange flow regulating valve, 22-second test end connector, 23-second storage container liquid outlet valve, 24-second test end valve, 25-second delivery pump, 26-second flow meter, 27-second pressure sensor, 28-second liquid level sensor, 29-temperature sensor, 3-air blowing path, 31-air intake valve, 41-first receiving container, 42-second receiving container, 43-recovery pipeline, 51-Display. DETAILED DESCRIPTION
[0024] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can realize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention.
[0025] In the description of the embodiments of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.
[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0028] Example
[0029] First, see Figure 1 to Figure 8 , this embodiment provides a faucet automatic detection device, which mainly includes a testing mechanism and a cleaning mechanism.
[0030] The test mechanism mainly includes a first test path 1 and / or a second test path 2 .
[0031] The first test path 1 is used to provide a first test medium to the product under test (water faucet); the temperature of the first test medium is consistent with the ambient temperature during the test.
[0032] The second test path 2 is used to provide a second test medium to the product under test; the temperature of the second test medium is higher than the temperature of the first test medium.
[0033] The first test medium and the second test medium can be two kinds of water with different temperatures; the user can select the first test path 1 and / or the second test path 2 according to the type of the product under test, and provide the first test medium and / or the second test medium to the product under test to facilitate the corresponding detection. For example, when testing a constant temperature shower, based on the characteristics of the constant temperature shower, the constant temperature shower can be connected to the first test path 1 and the second test path 2, and the first test medium and the second test medium can be provided to the product under test to maintain the stability of the internal temperature during the constant temperature shower test. For another example, when testing a faucet with hot and cold functions, it can be connected to the first test path 1 and the second test path 2 to test the thermal insulation performance of the hot and cold water partition wall in the faucet.
[0034] The cleaning mechanism is used to eliminate the first test medium and / or the second test medium remaining in the tested product after the test is completed, so as to clean the tested product and facilitate subsequent processes such as packaging of the tested product.
[0035] The first test path 1 mainly includes: a first storage container 11 and a first test end connector 12 connected by a pipeline.
[0036] The first storage container 11 is used to store the first test medium. The first storage container 11 is connected to a first replenishing pipe 111, and a first storage container water inlet valve 112 is installed on the first replenishing pipe 111. Through the arrangement of the first replenishing pipe 111 and the first storage container water inlet valve 112, it is convenient to replenish the first test medium to the first storage container 11.
[0037] The first test end connector 12 is used to connect the product under test. In this embodiment, the first test end connector 12 is a quick-connect connector. In other embodiments, the first test end connector 12 can be selected from a suitable type according to the product under test.
[0038] It can be understood that the above-mentioned pipeline for connecting the first storage container 11 and the first test end connector 12 needs to have the function of opening and closing. Specifically, in this embodiment, a first storage container liquid outlet valve 13 and / or a first test end valve 14 are arranged between the first storage container 11 and the first test end connector 12, wherein the first storage container liquid outlet valve 13 is arranged close to the first storage container 11, and the first test end valve 14 is arranged close to the first test end connector 12.
[0039] In this embodiment, a power source such as a first delivery pump 15 is provided between the first storage container 11 and the first test end connector 12, so as to deliver the first test medium in the first storage container 11 to the first test end connector 12 and the corresponding tested product. The first delivery pump 15 has a frequency converter. In other embodiments, no power source may be provided between the first storage container 11 and the first test end connector 12, and the first storage container 11 may be provided above the first test end connector 12, so that the first test medium can be delivered by utilizing the principle of gravity flow.
[0040] A first flow meter 16 , a first pressure sensor 17 and / or a first liquid level sensor 18 may also be provided on the first test path 1 .
[0041] The first flow meter 16 is used to detect the flow of the first test medium in the first test path 1, so as to test the flow rate, flow uniformity and water efficiency level of the tested product. In this embodiment, the first flow meter 16 is arranged between the first test end connector 12 and the first delivery pump 15.
[0042] The first pressure sensor 17 is used to detect the pressure of the first test medium in the first test path 1, so as to test the applicable pressure of the tested product. In this embodiment, the first pressure sensor 17 is arranged between the first flow meter 16 and the first test end connector 12, and is arranged close to the first test end connector 12.
[0043] The first liquid level sensor 18 is used to detect the liquid level of the first test medium in the first storage container 11 ; the first liquid level sensor 18 may be associated with the aforementioned first storage container water inlet valve 112 , so as to facilitate timely replenishment of the first test medium into the first storage container 11 .
[0044] Similar to the first test path 1 , the second test path 2 mainly includes: a second storage container 21 and a second test end connector 22 connected by a pipeline.
[0045] The second storage container 21 is used to store the second test medium. The second storage container 21 is connected to a second replenishing pipe 211, and a second storage container water inlet valve 212 is installed on the second replenishing pipe 211. The second replenishing pipe 211 and the second storage container water inlet valve 212 are arranged to facilitate replenishing the second test medium to the second storage container 21. In this embodiment, one end of the second replenishing pipe 211 is connected to the first replenishing pipe 111, and the other end is connected to the second storage container 21, that is, the second storage container 21 and the first storage container 11 share the first replenishing pipe 111. After the first test medium enters the second storage container 21, it is heated under the action of the temperature adjustment component described below to obtain the second test medium, so as to simplify the supporting pipelines.
[0046] The second test end connector 22 is used to connect the product under test. In this embodiment, the second test end connector 22 is a quick-connect connector. In other embodiments, the second test end connector 22 can be selected from a suitable type according to the product under test.
[0047] It can be understood that the above-mentioned pipeline for connecting the second storage container 21 and the second test end connector 22 needs to have the function of opening and closing. Specifically, in this embodiment, a second storage container liquid outlet valve 23 and / or a second test end valve 24 are arranged between the second storage container 21 and the second test end connector 22, wherein the second storage container liquid outlet valve 23 is arranged close to the second storage container 21, and the second test end valve 24 is arranged close to the second test end connector 22.
[0048] In this embodiment, a power source such as a second delivery pump 25 is provided between the second storage container 21 and the second test end connector 22, so as to deliver the second test medium in the second storage container 21 to the second test end connector 22 and the corresponding tested product. The second delivery pump 25 has a frequency converter. In other embodiments, no power source may be provided between the second storage container 21 and the second test end connector 22. By arranging the second storage container 21 above the second test end connector 22, the second test medium can be delivered by utilizing the principle of gravity flow.
[0049] The second test path 2 may also be provided with a second flow meter 26 , a second pressure sensor 27 , a second liquid level sensor 28 and / or a temperature sensor 29 .
[0050] The second flow meter 26 is used to detect the flow of the second test medium in the second test path 2, so as to test the flow, flow uniformity and water efficiency level of the tested product. In this embodiment, the second flow meter 26 is arranged between the second test end connector 22 and the second delivery pump 25.
[0051] The second pressure sensor 27 is used to detect the pressure of the second test medium in the second test path 2, so as to test the applicable pressure of the tested product. In this embodiment, the second pressure sensor 27 is arranged between the second flow meter 26 and the second test end connector 22, and is arranged close to the second test end connector 22.
[0052] The second liquid level sensor 28 is used to detect the liquid level of the second test medium in the second storage container 21; the second liquid level sensor 28 can be associated with the aforementioned second storage container water inlet valve 212, so as to facilitate timely replenishment of the second test medium into the second storage container 21 after the liquid level in the second storage container 21 drops.
[0053] The temperature sensor 29 is used to detect the temperature of the second test medium in the second storage container 21 so as to take corresponding measures to maintain the temperature of the second test medium in the second container within the temperature range required for the test.
[0054] In order to maintain the temperature of the second test medium in the second storage container 21 within the temperature range required for the test, a temperature regulating component is provided in the second storage container 21. In this embodiment, the temperature regulating component mainly includes a heat exchange pipe 213 arranged at the bottom of the second storage container 21 in a zigzag manner. The heat exchange pipe 213 exchanges heat with the second test medium in the second storage container 21 through the heat exchange medium flowing therein to maintain the temperature of the second test medium; a heat exchange flow regulating valve 214 is provided on the heat exchange pipe 213, and the heat exchange flow regulating valve 214 can be associated with the temperature sensor 29, so as to automatically adjust the flow of the heat exchange medium in the heat exchange pipe 213 according to the temperature change of the second test medium in the second storage container 21 to maintain the temperature of the second test medium.
[0055] The cleaning mechanism mainly includes a blowing path 3, and the first test end connector 12 and / or the second test end connector 22 are connected to the blowing path 3. The blowing path 3 is connected to the air source, and an air intake valve 31 is provided on the blowing path 3. In this way, after completing the test of various detection items, the air intake valve 31 can be opened, and the first test medium and / or the second test medium remaining in the tested product can be quickly discharged by using an airflow with a certain flow rate. In a specific implementation scenario, the air source is used to transport a hot air flow, so that the temperature of the hot air flow can be used to quickly dry the inside of the tested product; or, while using the flow rate of the hot air flow to discharge the first test medium and / or the second test medium remaining in the tested product, the temperature of the hot air flow is used to dry the inside of the tested product. This cleaning method that simultaneously uses the flow rate and temperature of the hot air flow has a good cleaning effect.
[0056] It should be noted that the function of the cleaning mechanism is to eliminate the first test medium and / or the second test medium remaining in the tested product after the test is completed. The above-mentioned blowing path 3 is only a preferred specific implementation method. The cleaning mechanism can also adopt other structures as long as it can achieve the above-mentioned purpose. This embodiment will not list them one by one.
[0057] The faucet automatic detection device may further include a first receiving container 41 , a second receiving container 42 and a recovery pipe 43 .
[0058] The first receiving container 41 is disposed below the first test end connector 12 and is used to collect the first test medium after use. In this embodiment, two first test end connectors 12 are disposed above the first receiving container 41 .
[0059] The second receiving container 42 is disposed below the second test end connector 22 and is used to collect the second test medium after use, or to collect the first test medium and the second test medium after use. In this embodiment, two first test end connectors 12 and one second test end connector 22 are disposed above the second receiving container 42.
[0060] The recovery pipe 43 is used to connect the first receiving container 41 and the first storage container 11 to recover the used first test medium into the first storage container 11 .
[0061] It should be noted that, since the temperature of the first test medium is consistent with the ambient temperature during the test, the temperature of the original first test medium in the first storage container 11 is not affected when the used first test medium is recycled to the first storage container 11. Since the temperature of the second test medium is higher than the ambient temperature during the test, if the used second test medium (with a lower temperature) is recycled to the second storage container 21, the temperature of the original second test medium in the second storage container 21 will be affected, and the energy consumption required to maintain the temperature of the second test medium in the second storage container 21 will be increased. Therefore, the used second test medium is not recycled in this embodiment. This embodiment uses both the first receiving container 41 and the second receiving container 42. In other embodiments, the first receiving container 41 or the second receiving container 42 can also be selected as needed.
[0062] It can be understood that the aforementioned valves are all solenoid valves, so that each valve can automatically perform an on-off action.
[0063] In order to reduce manual intervention in the detection process, the water faucet automatic detection device may further include a control mechanism, which is used to control the on / off of the first test path 1, the on / off of the second test path 2, and / or the working state of the cleaning mechanism. In this embodiment, the control mechanism mainly includes a PLC controller, a display 51, and a buzzer.
[0064] The input end of the PLC controller is electrically connected to the output ends of the first flow meter 16, the first pressure sensor 17, the first liquid level sensor 18, the second flow meter 26, the second pressure sensor 27, the second liquid level sensor 28 and the temperature sensor 29, and the output end of the PLC controller is electrically connected to the aforementioned valves, display 51 and buzzer, respectively.
[0065] The PLC controller can open or close the valves in the first test path 1, the second test path 2 and / or the blowing path 3 according to the preset program. The PLC controller can process the detection data of the aforementioned sensors in real time, obtain the corresponding detection results, and display the detection results on the built-in touch screen. When the detection results are abnormal, the PLC controller will make the buzzer alarm to prompt the operator to handle it.
[0066] Second, see Figure 1 to Figure 8 This embodiment provides a water faucet automatic detection method for detecting the sealing performance of a water faucet, which mainly includes the following steps: Step S1, connecting the product under test to the first test path 1 and / or the first test path 1 of the above-mentioned water faucet automatic detection device, and providing the first test medium and / or the second test medium to the product under test; Step S2, making the pressure in the first test path 1 and / or the second test path 2 reach a specified pressure range, comprises: The first pressure sensor 17 and / or the second pressure sensor 27 transmit the detected pressure signal to the PLC controller in real time, and the PLC controller automatically adjusts the frequency of the corresponding frequency converter according to the pressure signal to make the pressure reach the specified pressure range; Step S3, start timing, perform pressure maintenance testing, and detect and observe whether the product under test has water leakage; Step S4: after the first predetermined time is reached, the first test path 1 and / or the second test path 2 are closed, and the detection is completed; Step S5, eliminating the first test medium and / or the second test medium remaining in the tested product by a cleaning mechanism, comprising: Open the air blowing path 3; after the air blowing path 3 is opened for a second predetermined time, the air blowing path 3 is closed, and the buzzer sounds for 3 seconds, prompting the operator to take away the product being tested.
[0067] The above-mentioned water faucet automatic detection equipment can also be used for other detection items mentioned in the background technology.
[0068] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. In the absence of conflicts, the embodiments of the present application and the features in the embodiments may be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A water faucet automatic detection device, characterized in that: include: A testing mechanism, comprising a first testing path and / or a second testing path; The first test path is used to provide a first test medium to the product under test; The second test path is used to provide a second test medium to the product under test; the temperature of the second test medium is higher than the temperature of the first test medium; A cleaning mechanism, used to eliminate the first test medium and / or the second test medium remaining in the tested product after the test is completed; The control mechanism is used to control the on-off of the first test path, the on-off of the second test path, and / or the working state of the cleaning mechanism.
2. The water faucet automatic detection device according to claim 1, characterized in that: The first test path includes connected: a first storage container, for storing the first test medium; The first test end connector is used to connect to the product under test.
3. The automatic water faucet detection device according to claim 2, characterized in that: The first test path further includes a first flow meter, a first pressure sensor and / or a first liquid level sensor; The first flow meter is used to detect the flow of the first test medium in the first test path; The first pressure sensor is used to detect the pressure of the first test medium in the first test path; The first liquid level sensor is used to detect the liquid level of the first test medium in the first storage container.
4. The water faucet automatic detection device according to claim 1, characterized in that: The second test path mainly includes the connected: a second storage container, for storing the second test medium; The second test end connector is used to connect to the product under test.
5. The water faucet automatic detection device according to claim 4, characterized in that: The second test path further includes a second flow meter, a second pressure sensor, a second liquid level sensor and / or a temperature sensor; The second flow meter is used to detect the flow of the second test medium in the second test path; The second pressure sensor is used to detect the pressure of the second test medium in the second test path; The second liquid level sensor is used to detect the liquid level of the second test medium in the second storage container; The temperature sensor is used to detect the temperature of the second test medium in the second storage container.
6. The water faucet automatic detection device according to claim 4, characterized in that: A temperature regulating component is arranged in the second storage container.
7. The automatic water faucet detection device according to claim 1, characterized in that: Also includes a first receiving container and / or a second receiving container; The first receiving container is used to collect the first test medium after use; The second receiving container is used to collect the second test medium after use, or is used to collect the first test medium and the second test medium after use.
8. The automatic water faucet detection device according to claim 7, characterized in that: The system also includes a recovery pipe, which is used to recover the used first test medium into the first storage container.
9. The automatic water faucet detection device according to any one of claims 1 to 8, characterized in that: The cleaning mechanism comprises an air blowing path, and the first test path and / or the second test path are connected to the air blowing path.
10. A method for automatic detection of water faucets, comprising: Connecting the product under test to the first test path and / or the second test path as described in any one of claims 1 to 9, and providing the first test medium and / or the second test medium to the product under test; Making the pressure in the first test path and / or the second test path reach a prescribed pressure range; Start timing and conduct pressure maintenance test to check whether the product under test has water leakage; After a first predetermined time is reached, closing the first test path and / or the second test path; The first test medium and / or the second test medium remaining in the tested product is eliminated by the cleaning mechanism.