Testing equipment for coffee machine flow meter

Abstract

The invention discloses a coffee machine flowmeter testing device which comprises a machine body, a positioning clamp is arranged on a workbench of the machine body, the positioning clamp comprises a supporting base, a positioning assembly and a clamping mechanism, a pipeline inserting block is arranged on the supporting base, a testing water inlet channel and a testing water outlet channel are arranged on the pipeline inserting block, and the testing water inlet channel and the testing water outlet channel are communicated with the positioning assembly. A first water tank used for providing water for testing is arranged in the machine body, a water adding opening and a water discharging opening are formed in the machine body, and a flow adjusting pipeline is arranged between the water adding opening and the first water tank; a second water tank and an electronic scale are arranged in the machine body, the drainage port is connected with a flow guide pipeline, and a drainage pipeline is arranged at the bottom of the second water tank. Through the positioning clamp and the integrated pipeline insertion block, rapid positioning, clamping and waterway connection of the flowmeter are realized, so that the operation steps are simplified, and the testing efficiency is improved; and a weighing method principle is adopted, and a high-precision electronic scale is combined, so that the test accuracy is ensured.

Description

Technical Field

[0001] This invention relates to the technical field of testing equipment, and more particularly to a testing device for a coffee machine flow meter. Background Technology

[0002] Coffee machines, as common beverage preparation devices in modern life, directly determine the taste and quality of coffee through their ability to precisely control water flow. The flow meter is a core component of the coffee machine's water system, used to monitor and provide feedback on water flow data in real time, thereby accurately controlling the amount of water used for brewing. Therefore, before the flow meter is manufactured or the coffee machine is assembled, it must undergo rigorous flow testing to ensure stable performance and accurate measurement. However, due to the small size and special interface of the flow meter, frequent disassembly and reassembly and pipe connections are required during testing. Traditional manual handheld or simple fixing methods are not only cumbersome and inefficient, but also make it difficult to ensure the sealing of the test interface, easily leading to inaccurate test results. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a testing device that is easy to operate and can improve testing efficiency for testing coffee machine flow meters.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: A testing device for a coffee machine flow meter includes a body and a worktable mounted on the body. The worktable is provided with a positioning fixture for positioning the coffee machine flow meter. The positioning fixture includes a support base mounted on the worktable, a plurality of positioning components mounted on the support base for positioning the coffee machine flow meter, and a plurality of clamping mechanisms mounted on the support base for pressing the coffee machine flow meter onto the positioning components for fixation. A pipe insertion block is provided on the support base and located on one side of the positioning components. The pipe insertion block is provided with a test water inlet channel communicating with the inlet of the coffee machine flow meter and a test water outlet channel communicating with the outlet of the coffee machine flow meter. The outlet of the test water inlet channel and the inlet of the test water outlet channel are both located on the front side of the pipe insertion block. The machine body is provided with a first water tank for providing test water. The machine body is provided with a water inlet connected to the inlet of the test water inlet channel and a drain outlet connected to the outlet of the test water outlet channel. A flow regulating pipeline for adjusting the flow rate of the test water is provided between the water inlet and the first water tank. The machine body is equipped with a second water tank and an electronic scale for detecting the weight of the second water tank. The drain outlet is connected to a guide pipe that directs the test water flowing through it to the second water tank. The bottom of the second water tank is equipped with a drain pipe for discharging the test water inside.

[0005] In a preferred embodiment of the present invention, the flow regulating pipeline includes an outlet pipe connected to the bottom of the first water tank, a plurality of flow regulating pipes connected in parallel to the outlet pipe, and a flow detection pipe connected to each flow regulating pipe; the outlet pipe is provided with a first water filter and a first water pump; the flow regulating pipe includes a large flow regulating pipe for regulating a large flow rate and a small flow regulating pipe connected in parallel with the large flow regulating pipe for regulating a small flow rate; the large flow regulating pipe is provided with a large flow valve and a large flow regulating valve; the small flow regulating pipe is provided with a small flow valve and a small flow regulating valve; and the flow detection pipe is provided with a pressure regulating valve, a first pressure sensor, and a first pressure gauge.

[0006] In a preferred embodiment of the present invention, the end of the outlet pipe is connected to a diversion pipe for stabilizing water pressure, the other end of the diversion pipe is connected to the first water tank, and the diversion pipe is provided with a second pressure gauge, a second pressure sensor and a first ball valve.

[0007] In a preferred embodiment of the present invention, the drainage pipeline includes a drainage pipe, a second ball valve, a drainage funnel, and a first check valve disposed on the drainage pipe.

[0008] In a preferred embodiment of the present invention, a return pipeline is connected above the second water tank to draw the test water in the second water tank back to the first water tank. The return pipeline includes a return pipe and a second water pump and a second check valve disposed on the return pipe. A water pumping pipe made of rigid material is connected to the second water pump. The machine body is provided with a lifting cylinder that can drive the second water pump to move up and down, so that the water inlet of the water pumping pipe has two position states. When in the first position, the lifting cylinder drives the second water pump to move to the top, and the water inlet of the water pumping pipe is not higher than the top of the second water tank to prevent the test water in the second water tank from overflowing. When in the second position, the lifting cylinder drives the second water pump to move to the lowest position, and the water inlet of the water pumping pipe is located at the bottom of the second water tank, so as to pump the test water in the second water tank back into the first water tank.

[0009] In a preferred embodiment of the present invention, the bottom of the first water tank is connected to a water supply pipeline, the water supply pipeline including a water supply pipe, a third ball valve, a second water filter and a water supply valve disposed on the water supply pipe, the top of the first water tank is connected to an overflow prevention pipeline, and the bottom is connected to a drain pipeline, the drain pipeline including a drain pipe and a drain valve disposed on the drain pipe.

[0010] In a preferred embodiment of the present invention, the positioning component includes a support block disposed on the support base and a positioning block disposed on the rear side of the support block. The positioning block includes a positioning groove disposed on the front side for positioning the coffee machine flow meter, a first slot disposed on its rear side wall for the coffee machine flow meter inlet to pass through, and a second slot disposed on its rear side wall for the coffee machine flow meter outlet to pass through. The left and right side walls of the positioning groove are provided with limiting grooves for limiting the left and right sides of the coffee machine flow meter.

[0011] In a preferred embodiment of the present invention, the support base includes at least two support legs disposed on the workbench, a first support plate disposed laterally on the support legs, and a second support plate disposed vertically on the rear side of the first support plate. The positioning block is disposed on the front side of the second support plate, the pipe insertion block is disposed on the rear side of the second support plate, and the second support plate is provided with an opening through which the inlet and outlet of the coffee machine flow meter can pass.

[0012] In a preferred embodiment of the present invention, the pipe connector includes a cover plate disposed on the front side and located in the opening. The cover plate is provided with a first through hole communicating with the outlet of the test water inlet channel and a second through hole communicating with the inlet of the test water outlet channel. Both the first through hole and the second through hole are provided with sealing rings.

[0013] In a preferred embodiment of the present invention, the clamping mechanism includes a push block disposed above the first support plate and movable back and forth to push the coffee machine flow meter located on the support block toward the positioning block for clamping and fixing; a telescopic cylinder disposed at the bottom of the first support plate and capable of driving the push block to move back and forth; and a transmission block disposed between the push block and the telescopic cylinder. The rear side of the push block is provided with a push groove that matches the shape of the front side of the coffee machine flow meter.

[0014] The beneficial effects of this invention are: by using positioning fixtures and integrated pipe plug blocks, the flow meter can be quickly positioned, clamped, and connected to the water circuit, thereby simplifying the operation steps and improving testing efficiency; in addition, by adopting the weighing method and combining it with a high-precision electronic scale, the accuracy of the test is guaranteed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a schematic diagram of the pipeline in this invention; Figure 3 In this invention Figure 2 Enlarged view of Figure A; Figure 4 This is a schematic diagram of the positioning fixture in this invention; Figure 5 This is an exploded view of the positioning fixture in this invention; Figure 6 In this invention Figure 5 Enlarged view of Figure B; Figure 7 This is a schematic diagram of the second water pump and the lifting cylinder in this invention. Detailed Implementation

[0016] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0017] Reference Figures 1 to 7 A testing device for a coffee machine flow meter includes a body 1 and a worktable 11 mounted on the body 1. The worktable 11 is provided with a positioning fixture 2 for positioning the coffee machine flow meter. The positioning fixture 2 includes a support base 21 mounted on the worktable 11, several positioning components 22 mounted on the support base 21 for positioning the coffee machine flow meter, and several clamping mechanisms 23 mounted on the support base 21 for pressing the coffee machine flow meter onto the positioning components 22 for fixation. A pipe insertion block 24 is provided on the support base 21 and located on one side of the positioning components 22. The pipe insertion block 24 is provided with a test water inlet channel 241 connected to the inlet of the coffee machine flow meter and a test water outlet channel 242 connected to the outlet of the coffee machine flow meter. The outlet of the test water inlet channel 241 and the inlet of the test water outlet channel 242 are both located on the front side of the pipe insertion block 24. By integrating the test inlet channel 241 and the test outlet channel 242 onto the pipe connector block 24, and then cooperating with the clamping mechanism 23, the coffee machine flow meter is initially positioned by the positioning component 22 and then clamped and fixed by the clamping mechanism 23. This allows the inlet and outlet of the coffee machine flow meter to automatically align and fit tightly with the corresponding channel interfaces on the pipe connector block 24, thus achieving quick connection, eliminating the cumbersome step of connecting a separate hose, and improving testing efficiency.

[0018] The machine body 1 contains a first water tank 3 for providing test water. The machine body 1 has a water inlet 12 connected to the inlet of the test water inlet channel 241 and a drain outlet 13 connected to the outlet of the test water outlet channel 242. A flow regulating pipe 4 for adjusting the flow rate of the test water is provided between the water inlet 12 and the first water tank 3. The first water tank 3 also contains a heater and a temperature sensor to ensure a stable water level for the test water, and a water level sensor for replenishing water. Thus, the flow regulating pipe 4 provides a stable and precisely adjustable water flow to the testing system, simulating the water flow conditions of a coffee machine under different operating conditions, thereby comprehensively testing the metering accuracy of the coffee machine's flow meter at various flow rates.

[0019] The machine body 1 contains a second water tank 5 and an electronic scale 6 for detecting the weight of the second water tank 5. A guide pipe 7 is connected to the drain outlet 13 to direct the test water flowing through it into the second water tank 5. A drain pipe 8 is located at the bottom of the second water tank 5 to discharge the test water. Because the coffee machine flow meter is small, the flow rate is low; therefore, the electronic scale 6 is used to calculate the flow rate by weighing, thereby improving the testing accuracy.

[0020] In this scheme, the flow regulation pipeline 4 includes an outlet pipe 41 connected to the bottom of the first water tank 3, several flow regulation pipelines 42 connected in parallel to the outlet pipe 41, and a flow detection pipeline 43 connected to each flow regulation pipeline 42. The outlet pipe 41 is equipped with a first water filter 411 and a first water pump 412. The flow regulation pipelines 42 include a large flow regulation pipeline 421 for regulating large flow rates and a small flow regulation pipeline 422 connected in parallel to the large flow regulation pipeline 421 for regulating small flow rates. The large flow regulation pipeline 421 is equipped with a large flow valve 4211 and a large flow regulating valve 4212. The small flow regulation pipeline 422 is equipped with a small flow valve 4221 and a small flow regulating valve 4222. The flow detection pipeline 43 is equipped with a pressure regulating valve 431, a first pressure sensor 432, and a first pressure gauge 433. By setting up parallel large and small flow regulation pipelines 422, a wide testing range from extremely low flow rates to extremely high flow rates can be covered. The large and small flow regulating valves 4222 can finely adjust the flow rate of their respective pipelines, while the pressure regulating valve 431 is used to stabilize the test inlet pressure. The pressure sensor and pressure gauge are used to monitor and display the pressure value in real time. In addition, the first water filter 411 can effectively filter out impurities in the water, protecting the flow meter under test and precision components such as valves and water pumps in the pipeline, and extending the service life of the equipment.

[0021] In this design, the outlet pipe 41 is connected to a diversion pipe 44 for stabilizing water pressure. The other end of the diversion pipe 44 is connected to the first water tank 3. The diversion pipe 44 is equipped with a second pressure gauge 441, a second pressure sensor 442, and a first ball valve 443. Thus, when the first water pump 412 is operating, its output flow rate may exceed the maximum flow rate required for testing. Excess water can be directly bypassed and returned to the first water tank 3 through the diversion pipe 44, making the water flow in the flow regulation pipe 4 more stable.

[0022] In this design, the drainage pipe 8 includes a drainage pipe 81, a second ball valve 811, a drainage funnel 812, and a first check valve 813 installed on the drainage pipe 81. The drainage funnel 812 guides the water remaining in the second water tank 5 to the external sewer, and the first check valve 813 prevents the discharged water from flowing back into the machine body 1.

[0023] In this scheme, a return pipe 9 is connected above the second water tank 5 to pump the test water in the second water tank 5 back to the first water tank 3. The return pipe 9 includes a return pipe 91, a second water pump 911 and a second check valve 912 installed on the return pipe 91. A water pumping pipe 913 made of rigid material is connected to the second water pump 911. The body 1 is provided with a lifting cylinder 914 that can drive the second water pump 911 to move up and down, so that the water inlet of the water pumping pipe 913 has two position states. A water level sensor is provided at the top of the second water tank 5 to check the overflow water level.

[0024] When in the first position, the lifting cylinder 914 drives the second water pump 911 to move to the top, and the water inlet of the water pumping pipe 913 is not higher than the top of the second water tank 5 to prevent the test water in the second water tank 5 from overflowing.

[0025] When in the second position, the lifting cylinder 914 drives the second water pump 911 to move to the lowest position, and the water inlet of the water pumping pipe 913 is located at the bottom of the second water tank 5, so as to pump the test water in the second water tank 5 back into the first water tank 3.

[0026] During the test (first position), the water inlet is located at the top of the water tank, preventing contact with or interference with the water surface and ensuring the accuracy of the weighing by the electronic scale 6. Simultaneously, it serves as a safety protection against overflow should the water level in the tank rise abnormally. After the test (second position), the lifting cylinder 914 lowers the water pump to the bottom of the water tank, allowing all the collected test water to be pumped back to the first water tank 3, achieving water recycling and conserving water resources.

[0027] In this solution, the bottom of the first water tank 3 is connected to a water supply pipe 31, which includes a water supply pipe 311, a third ball valve 312, a second water filter 313, and a water supply valve 314 installed on the water supply pipe 311. The top of the first water tank 3 is connected to an overflow prevention pipe 32, and the bottom is connected to a water discharge pipe 33, which includes a water discharge pipe 331 and a water discharge valve 332 installed on the water discharge pipe 331. The water supply pipe 31 is used to replenish water to the first water tank 3 from an external water source when the equipment is running for the first time or when the water level in the first water tank 3 is too low, and the cleanliness of the replenished water is ensured by the second water filter 313; the overflow prevention pipe 32 serves as a safety protection for the first water tank 3, and when the water level is too high, excess water can be discharged through this pipe to prevent overflow; the drain pipe 33 is used to completely empty the water in the first water tank 3 when the equipment is shut down for a long time, for maintenance or water replacement, which is convenient to operate.

[0028] In this solution, the positioning component 22 includes a support block 221 disposed on the support base 21 and a positioning block 222 disposed on the rear side of the support block 221. The positioning block 222 includes a positioning groove 2221 disposed on the front side for positioning the coffee machine flow meter, a first slot 2222 disposed on its rear side wall for the coffee machine flow meter inlet to pass through, and a second slot 2223 disposed on its rear side wall for the coffee machine flow meter outlet to pass through. In this way, the support block 221 supports the front part of the coffee machine flow meter, and the positioning block 222 is used to limit the rear part of the coffee machine flow meter. When the flow meter is placed on the support block 221, its tail is embedded in the positioning groove 2221. At this time, the inlet and outlet of the coffee machine flow meter are respectively inserted into the first slot 2222 and the second slot 2223 so as to connect with the interface on the pipe plug block 24 located at the rear. Furthermore, the positioning groove 2221 is provided with limiting grooves 2224 on both the left and right sides to limit the left and right sides of the coffee machine flow meter. The limiting grooves 2224 on both sides match the protrusions or contours on the side of the coffee machine flow meter, thereby preventing the coffee machine flow meter from wobbling left and right during clamping. This provides a reliable alignment basis for subsequent precise pressing and sealing docking, and improves the repeatability and accuracy of the test.

[0029] In this design, the support base 21 includes at least two support legs 211 mounted on the workbench 11, a first support plate 212 horizontally mounted on the support legs 211, and a second support plate 213 vertically mounted on the rear side of the first support plate 212. The positioning block 222 is mounted on the front side of the second support plate 213, and the pipe insertion block 24 is mounted on the rear side of the second support plate 213. The second support plate 213 has an opening 2131 through which the inlet and outlet of the coffee machine flow meter can pass. This raises the entire fixture via the support legs 211, facilitating the arrangement of the drive mechanism below. The first support plate 212 provides a platform for the installation of the clamping mechanism 23, while the second support plate 213 serves as the mounting base for the positioning component 22 and the pipe insertion block 24. Furthermore, the opening 2131 on the second support plate 213 allows the inlet and outlet of the flow meter to pass through and connect with the pipe insertion block 24 located at the rear, resulting in a more compact and rational overall structural layout.

[0030] In this design, the pipe connector 24 includes a cover plate 243 located on the front side within the opening 2131. The cover plate 243 has a first through hole 244 communicating with the outlet of the test water inlet channel 241 and a second through hole 245 communicating with the inlet of the test water outlet channel 242. Both the first through hole 244 and the second through hole 245 are equipped with sealing rings 246. Thus, when the flow meter is pushed backward by the clamping mechanism 23, the inlet and outlet ends of the flow meter are inserted into the first through hole 244 and the second through hole 245 respectively, compressing the sealing rings 244 to form a reliable radial seal, thereby improving test accuracy.

[0031] In this solution, the clamping mechanism 23 includes a push block 231 disposed above the first support plate 212 and movable back and forth to push the coffee machine flow meter located on the support block 221 toward the positioning block 222 for clamping and fixing; a telescopic cylinder 232 disposed at the bottom of the first support plate 212 and capable of driving the push block 231 to move back and forth; and a transmission block 233 disposed between the push block 231 and the telescopic cylinder 232. The rear side of the push block 231 is provided with a push groove 2311 that matches the shape of the front side of the coffee machine flow meter.

[0032] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A testing device for a coffee machine flow meter, comprising a body (1) and a worktable (11) disposed on the body (1), characterized in that, The workbench (11) is provided with a positioning fixture (2) for positioning the coffee machine flow meter. The positioning fixture (2) includes a support base (21) set on the workbench (11), several positioning components (22) set on the support base (21) for positioning the coffee machine flow meter, and several clamping mechanisms (23) set on the support base (21) for pressing the coffee machine flow meter onto the positioning components (22) for fixing. A pipe plug block (24) is provided on the support base (21) and on one side of the positioning components (22). The pipe plug block (24) is provided with a test water inlet channel (241) connected to the inlet of the coffee machine flow meter and a test water outlet channel (242) connected to the outlet of the coffee machine flow meter. The outlet of the test water inlet channel (241) and the inlet of the test water outlet channel (242) are both located on the front side of the pipe plug block (24). The body (1) is provided with a first water tank (3) for providing test water. The body (1) is provided with a water inlet (12) connected to the inlet of the test water inlet channel (241) and a drain outlet (13) connected to the outlet of the test water outlet channel (242). A flow regulating pipe (4) for regulating the flow rate of test water is provided between the water inlet (12) and the first water tank (3). The machine body (1) is equipped with a second water tank (5) and an electronic scale (6) for detecting the weight of the second water tank (5). The drain outlet (13) is connected to a guide pipe (7) that guides the test water flowing through it to the second water tank (5). The bottom of the second water tank (5) is equipped with a drain pipe (8) for discharging the test water inside.

2. The testing equipment for a coffee machine flow meter according to claim 1, characterized in that, The flow regulation pipeline (4) includes an outlet pipe (41) connected to the bottom of the first water tank (3), several flow regulation pipelines (42) connected in parallel to the outlet pipe (41), and a flow detection pipeline (43) connected to each flow regulation pipeline (42); the outlet pipe (41) is equipped with a first water filter (411) and a first water pump (412), and the flow regulation pipeline (42) includes a large flow regulation pipeline (421) for regulating large flow rates, and so on. A small flow regulating pipe (422) is connected in parallel with the large flow regulating pipe (421) and used to regulate a small flow. The large flow regulating pipe (421) is equipped with a large flow valve (4211) and a large flow regulating valve (4212). The small flow regulating pipe (422) is equipped with a small flow valve (4221) and a small flow regulating valve (4222). The flow detection pipe (43) is equipped with a pressure regulating valve (431), a first pressure sensor (432) and a first pressure gauge (433).

3. The testing equipment for a coffee machine flow meter according to claim 2, characterized in that, The outlet pipe (41) is connected to a diversion pipe (44) for stabilizing water pressure at the end. The other end of the diversion pipe (44) is connected to the first water tank (3). The diversion pipe (44) is equipped with a second pressure gauge (441), a second pressure sensor (442) and a first ball valve (443).

4. The testing equipment for a coffee machine flow meter according to claim 1, characterized in that, The drainage pipeline (8) includes a drainage pipe (81), a second ball valve (811), a drainage funnel (812), and a first check valve (813) disposed on the drainage pipe (81).

5. The testing device for a coffee machine flow meter according to claim 4, characterized in that, The second water tank (5) is connected to a return pipe (9) that can pump the test water in the second water tank (5) back to the first water tank (3). The return pipe (9) includes a return pipe (91), a second water pump (911) and a second check valve (912) installed on the return pipe (91). The second water pump (911) is connected to a water pumping pipe (913) made of rigid material. The body (1) is provided with a lifting cylinder (914) that can drive the second water pump (911) to move up and down, so that the water inlet of the water pumping pipe (913) has two position states. When in the first position, the lifting cylinder (914) drives the second water pump (911) to move to the top, and the water inlet of the water pumping pipe (913) is not higher than the top of the second water tank (5) to prevent the test water in the second water tank (5) from overflowing. When in the second position, the lifting cylinder (914) drives the second water pump (911) to move to the lowest position, and the water inlet of the water pumping pipe (913) is located at the bottom of the second water tank (5) to pump the test water in the second water tank (5) back into the first water tank (3).

6. The testing equipment for a coffee machine flow meter according to claim 1, characterized in that, The bottom of the first water tank (3) is connected to a water supply pipe (31), which includes a water supply pipe (311), a third ball valve (312), a second water filter (313), and a water supply valve (314) installed on the water supply pipe (311). The top of the first water tank (3) is connected to an overflow prevention pipe (32), and the bottom is connected to a water discharge pipe (33), which includes a water discharge pipe (331) and a water discharge valve (332) installed on the water discharge pipe (331).

7. A testing device for a coffee machine flow meter according to any one of claims 1 to 6, characterized in that, The positioning component (22) includes a support block (221) disposed on the support base (21) and a positioning block (222) disposed on the rear side of the support block (221). The positioning block (222) includes a positioning groove (2221) disposed on the front side for positioning the coffee machine flow meter, a first slot (2222) disposed on its rear side wall for the coffee machine flow meter inlet to pass through, and a second slot (2223) disposed on its rear side wall for the coffee machine flow meter outlet to pass through. The left and right side walls of the positioning groove (2221) are provided with limiting grooves (2224) for limiting the left and right sides of the coffee machine flow meter.

8. The testing device for a coffee machine flow meter according to claim 7, characterized in that, The support base (21) includes at least two support legs (211) disposed on the workbench (11), a first support plate (212) disposed horizontally on the support legs (211), and a second support plate (213) disposed vertically on the rear side of the first support plate (212). The positioning block (222) is disposed on the front side of the second support plate (213), and the pipe insertion block (24) is disposed on the rear side of the second support plate (213). The second support plate (213) is provided with an opening (2131) through which the inlet and outlet of the coffee machine flow meter can pass.

9. The testing device for a coffee machine flow meter according to claim 8, characterized in that, The pipe connector (24) includes a cover plate (243) disposed on the front side and located in the opening (2131). The cover plate (243) is provided with a first through hole (244) communicating with the outlet of the test water inlet channel (241) and a second through hole (245) communicating with the inlet of the test water outlet channel (242). Both the first through hole (244) and the second through hole (245) are provided with sealing rings (246).

10. The testing device for a coffee machine flow meter according to claim 9, characterized in that, The clamping mechanism (23) includes a push block (231) disposed above the first support plate (212) and movable back and forth to push the coffee machine flow meter located on the support block (221) toward the positioning block (222) for clamping and fixing; a telescopic cylinder (232) disposed at the bottom of the first support plate (212) and capable of driving the push block (231) to move back and forth; and a transmission block (233) disposed between the push block (231) and the telescopic cylinder (232). The rear side of the push block (231) is provided with a push groove (2311) that matches the shape of the front side of the coffee machine flow meter.

Images