Device for testing sealing performance of fuel pump of electronic fuel injection engine

Abstract

The utility model relates to the technical field of sealing performance testing devices, in particular to an electronic fuel injection engine fuel pump sealing performance testing device, which is characterized in that an air supply mechanism is started to discharge air into a condensation mechanism, impurities and water vapor in the air are discharged through the condensation mechanism, and dried air is discharged into the air supply mechanism to be heated. The heated gas is discharged into the fuel pump of the electronic fuel injection engine for detection, so that the practicability of the equipment is improved; comprising a supporting mechanism; the device further comprises a moving mechanism, a fixing mechanism, an exhaust mechanism, a condensation mechanism and an air supply mechanism, the moving mechanism is installed in the supporting mechanism, the fixing mechanism is installed on the moving mechanism, the exhaust mechanism is installed on the supporting mechanism, the condensation mechanism and the air supply mechanism are both installed on the supporting mechanism, and the air supply mechanism is located on the left side of the condensation mechanism. The air supply mechanism is connected with the supporting mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing test devices, and in particular to a sealing test device for an electronic fuel injection engine fuel pump. Background Technology

[0002] The fuel pump is the power source for gasoline to travel from the fuel tank to the engine combustion chamber. It is usually built into the fuel tank and integrated with the fuel level sensor and pressure regulator. The working principle of the fuel pump is that after the DC motor is energized, it drives the rotor inside the pump housing to rotate at high speed. The cross-section of the lower end of the rotor shaft is combined with the cross-section of the inner hole of the impeller. When the rotor rotates, it drives the impeller to rotate in the same direction through the rotor shaft. During the high-speed rotation of the impeller, a vacuum low pressure is created at the fuel inlet, which draws in filtered fuel from the fuel inlet of the pump cover. The fuel drawn in is pressurized by the fuel pump impeller and enters the pump housing before being expelled through the fuel outlet, providing the fuel system with fuel at a certain pressure.

[0003] For example, the prior art represented by the sealing test device disclosed in the utility model patent application number CN202323618005.4 mainly consists of a detection chamber, a cavity, a sealing door, a vacuum interface, a handle, a limiting groove, a rubber pad, and a detection sealing plate. The sealing test is achieved through the cooperation of the detection chamber, cavity, sealing door, vacuum interface, handle, limiting groove, rubber pad, and detection sealing plate.

[0004] The fuel pump of an electronic fuel injection engine operates at a high temperature. Traditional air tightness testing devices can affect the test results when testing the fuel pump. Furthermore, traditional air tightness testing devices release gas into the fuel pump, and the air in a humid environment contains a lot of water vapor, which can affect the subsequent use of the fuel pump. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an electronic fuel injection engine fuel pump sealing performance testing device that improves the practicality of the equipment by activating the air supply mechanism to discharge air into the condensation mechanism, through which impurities and water vapor in the air are discharged, the dried gas is discharged into the air supply mechanism for heating, and the heated gas is discharged into the electronic fuel injection engine fuel pump for testing.

[0006] This utility model discloses a fuel pump sealing performance testing device for an electronic fuel injection engine, comprising a support mechanism; it also includes a moving mechanism, a fixing mechanism, an exhaust mechanism, a condensing mechanism, and an air supply mechanism. The moving mechanism is installed inside the support mechanism, the fixing mechanism is installed on the moving mechanism, the exhaust mechanism is installed on top of the support mechanism, and both the condensing mechanism and the air supply mechanism are installed on the support mechanism. The air supply mechanism is located to the left of the condensing mechanism and is connected to the support mechanism. By opening the support mechanism and activating the moving mechanism to move the fixing mechanism out of the support mechanism, the operator places the electronic fuel injection engine fuel pump on the fixing mechanism and... The fuel pump of the electronic fuel injection engine is fixed by a fixing mechanism. After fixing, the fuel pump is moved into the support mechanism by starting the moving mechanism. The operator connects the air supply mechanism and the input end of the fuel pump, and seals the output end of the fuel pump, making the support mechanism sealed. The gas in the support mechanism is discharged by starting the exhaust mechanism, and the air is discharged into the condensation mechanism by starting the air supply mechanism. The condensation mechanism removes impurities and water vapor from the air. The dried gas is discharged into the air supply mechanism for heating, and the heated gas is discharged into the fuel pump for testing, improving the practicality of the equipment.

[0007] Preferably, the support mechanism includes a support base, a detection chamber, a sealing door, and a sensor. The detection chamber is installed on the top of the support base, the sealing door is installed on the left side wall of the detection chamber, and the top of the sensor is installed on the top inner wall of the detection chamber. The support base supports the detection chamber, and the electronic fuel injection engine fuel pump is placed inside the detection chamber by opening the sealing door. The sensor detects the airtightness of the electronic fuel injection engine fuel pump, thereby improving the practicality of the equipment.

[0008] Preferably, the moving mechanism includes two sets of slides, two sets of lead screws, two sets of sliders, two sets of drive shafts, a conveyor belt, and a motor. The bottom ends of the two sets of slides are respectively installed on the bottom end of the inner wall of the detection chamber. The two sets of slides are respectively installed inside the two sets of slides. The inside of the two sets of sliders is respectively slidably installed on the two sets of lead screws, and the outside of the two sets of sliders is respectively slidably installed on the inner wall of the two sets of slides. The inner rings of the two sets of drive shafts are respectively installed on the right side of the two sets of lead screws. The conveyor belt is fitted onto the two sets of drive shafts. The output end of the motor is connected to the right end of one of the lead screws. The two sets of slides support the two sets of lead screws respectively. By starting the motor, the two sets of drive shafts are rotated through the conveyor belt. The rotation of the two sets of drive shafts rotates the two sets of lead screws respectively. The two sets of sliders are guided by the two sets of slides respectively, causing the fixed mechanism to move and improving the practicality of the equipment.

[0009] Preferably, the fixing mechanism includes a support plate, two sets of electric cylinders, and two sets of fixing plates. The bottom end of the support plate is mounted on two sets of sliders, and the top end of the support plate is provided with a mounting plate. The fixed ends of the two sets of electric cylinders are respectively mounted on the baffles at the top of the support plate, and the two sets of fixing plates are respectively mounted on the moving ends of the two sets of electric cylinders. The support plate supports the two sets of electric cylinders respectively, and the fuel pump of the electronic fuel injection engine is fixed by extending the two sets of electric cylinders respectively through the two sets of fixing plates, thereby improving the practicality of the equipment.

[0010] Preferably, the exhaust mechanism includes an exhaust pipe, a valve, and a vacuum pump. The input end of the exhaust pipe is connected to the top of the detection chamber, and a valve is installed on the exhaust pipe. The output end of the exhaust pipe is connected to the input end of the vacuum pump. By starting the vacuum pump, the gas in the detection chamber is discharged through the exhaust pipe. By closing the valve, gas is prevented from entering the detection chamber, thus improving the practicality of the equipment.

[0011] Preferably, the condensation mechanism includes a drying tube, a heat exchanger, a circulating pump, a refrigeration box, a filter plate, a baffle plate, a drain pipe, and a collection tank. The heat exchanger is installed on the outer wall of the drying tube, and its output end is connected to the input end of the circulating pump. The output end of the circulating pump is connected to the input end of the refrigeration box, and the output end of the refrigeration box is connected to the input end of the heat exchanger. The filter plate and the baffle plate are both installed on the inner wall of the drying tube, with the filter plate located to the right of the baffle plate. The input end of the drain pipe is installed on the outer wall of the drying tube, located below the baffle plate, and its output end is connected to the input end of the collection tank. By activating the air supply mechanism, air is discharged into the drying tube, and the filter plate filters impurities from the air. By activating the circulating pump, the liquid in the heat exchanger is discharged into the refrigeration box for cooling. The cooled liquid is discharged back into the heat exchanger to condense the air in the drying tube. The condensed liquid passes through the baffle plate to the drain pipe and is discharged into the collection tank, improving the practicality of the equipment.

[0012] Preferably, the gas supply mechanism includes a first pipe, a heating box, an air pump, a second pipe, a connector, and a bracket. The input end of the first pipe is connected to the output end of the drying pipe, the output end of the first pipe is connected to the input end of the heating box, the output end of the heating box is connected to the input end of the air pump, the output end of the air pump is connected to the input end of the second pipe, the output end of the second pipe is connected to the input end of the connector, and the output end of the connector is connected to the input end of the electronic fuel injection engine fuel pump. The connector is located inside the testing chamber. The bottom ends of the heating box and the air pump are both mounted on the top of the bracket. By activating the second pipe, air is discharged into the condensing mechanism for condensation. The dried gas is discharged into the heating box through the first pipe. By activating the heating box, the gas is heated to a specified temperature. The heated gas is then discharged into the electronic fuel injection engine fuel pump through the second pipe to the connector for airtightness testing. The bracket supports the heating box and the air pump, improving the practicality of the equipment.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By opening the support mechanism and moving the fixed mechanism through the activation of the moving mechanism, the fixed mechanism is moved out of the support mechanism. The operator places the electronic fuel injection engine fuel pump on the fixed mechanism and fixes it through the fixed mechanism. After fixing, the operator moves the electronic fuel injection engine fuel pump into the support mechanism through the activation of the moving mechanism. The operator connects the air supply mechanism and the input end of the electronic fuel injection engine fuel pump, and seals the output end of the electronic fuel injection engine fuel pump, making the support mechanism sealed. The gas in the support mechanism is discharged by activating the exhaust mechanism, and the air is discharged into the condensation mechanism by activating the air supply mechanism. The condensation mechanism discharges impurities and water vapor from the air. The dried gas is discharged into the air supply mechanism for heating, and the heated gas is discharged into the electronic fuel injection engine fuel pump for testing, thus improving the practicality of the equipment. Attached Figure Description

[0014] Figure 1 This is an isometric sectional view of the present invention;

[0015] Figure 2 This is a right-side sectional view of the support mechanism of this utility model;

[0016] Figure 3 This is an isometric schematic diagram of the moving mechanism of this utility model;

[0017] Figure 4 This is an isometric schematic diagram of the fixing mechanism of this utility model;

[0018] Figure 5 This is an isometric schematic diagram of the exhaust mechanism of this utility model;

[0019] Figure 6 This is an isometric sectional view of the condensation mechanism of this utility model;

[0020] Figure 7 This is a front view of the gas supply mechanism of this utility model.

[0021] The attached diagram is labeled as follows: 01, Support mechanism; 11, Support base; 12, Detection chamber; 13, Sealing door; 14, Sensor; 02, Moving mechanism; 21, Slide groove; 22, Lead screw; 23, Slider; 24, Drive shaft; 25, Conveyor belt; 26, Motor; 03, Fixing mechanism; 31, Support plate; 32, Electric cylinder; 33, Fixing plate; 04, Exhaust mechanism; 41, Exhaust pipe; 42, Valve; 43, Vacuum pump; 05, Condensation mechanism; 51, Drying pipe; 52, Heat exchanger; 53, Circulation pump; 54, Refrigeration box; 55, Filter plate; 56, Baffle plate; 57, Drain pipe; 58, Collection tank; 06, Gas supply mechanism; 61, First pipe; 62, Heating box; 63, Air pump; 64, Second pipe; 65, Connector; 66, Bracket. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0023] Example 1

[0024] like Figure 1 As shown, a fuel pump sealing performance testing device for an electronic fuel injection engine includes a support mechanism 01; it also includes a moving mechanism 02, a fixing mechanism 03, an exhaust mechanism 04, a condensing mechanism 05, and an air supply mechanism 06. The moving mechanism 02 is installed inside the support mechanism 01, the fixing mechanism 03 is installed on the moving mechanism 02, the exhaust mechanism 04 is installed on top of the support mechanism 01, the condensing mechanism 05 and the air supply mechanism 06 are both installed on the support mechanism 01, the air supply mechanism 06 is located to the left of the condensing mechanism 05, and the air supply mechanism 06 is connected to the support mechanism 01.

[0025] By opening the support mechanism 01 and moving the fixed mechanism 03 by activating the moving mechanism 02, the fixed mechanism 03 is moved outside the support mechanism 01. The operator places the electronic fuel injection engine fuel pump on the fixed mechanism 03 and fixes it in place. After fixing, the operator moves the electronic fuel injection engine fuel pump into the support mechanism 01 by activating the moving mechanism 02. The operator connects the air supply mechanism 06 to the input end of the electronic fuel injection engine fuel pump and seals the output end of the electronic fuel injection engine fuel pump, making the support mechanism 01 sealed. The operator then activates the exhaust mechanism 04 to discharge the gas in the support mechanism 01 and activates the air supply mechanism 06 to discharge the air into the condensation mechanism 05. The condensation mechanism 05 discharges impurities and water vapor from the air. The dried gas is then discharged into the air supply mechanism 06 for heating and discharged into the electronic fuel injection engine fuel pump for testing, thus improving the practicality of the equipment.

[0026] like Figure 2 As shown, the support mechanism 01 includes a support base 11, a detection chamber 12, a sealing door 13, and a sensor 14. The detection chamber 12 is installed on the top of the support base 11, the sealing door 13 is installed on the left side wall of the detection chamber 12, and the top of the sensor 14 is installed on the top inner wall of the detection chamber 12.

[0027] like Figure 3As shown, the moving mechanism 02 includes two sets of slide grooves 21, two sets of lead screws 22, two sets of sliders 23, two sets of drive shafts 24, a conveyor belt 25, and a motor 26. The bottom ends of the two sets of slide grooves 21 are respectively installed on the bottom end of the inner wall of the detection chamber 12. The two sets of slide grooves 21 are respectively installed inside the two sets of slide grooves 21. The inside of the two sets of sliders 23 are respectively slidably installed on the two sets of lead screws 22. The outside of the two sets of sliders 23 are respectively slidably installed on the inner wall of the two sets of slide grooves 21. The inner rings of the two sets of drive shafts 24 are respectively installed on the right side of the two sets of lead screws 22. The conveyor belt 25 is fitted on the two sets of drive shafts 24. The output end of the motor 26 is connected to the right end of one of the lead screws 22.

[0028] like Figure 4 As shown, the fixing mechanism 03 includes a support plate 31, two sets of electric cylinders 32 and two sets of fixing plates 33. The bottom end of the support plate 31 is mounted on two sets of sliders 23, and the top end of the support plate 31 is provided with a mounting plate. The fixed ends of the two sets of electric cylinders 32 are respectively mounted on the baffles at the top end of the support plate 31, and the two sets of fixing plates 33 are respectively mounted on the moving ends of the two sets of electric cylinders 32.

[0029] like Figure 5 As shown, the exhaust mechanism 04 includes an exhaust pipe 41, a valve 42, and a vacuum pump 43. The input end of the exhaust pipe 41 is connected to the top of the detection chamber 12. The valve 42 is installed on the exhaust pipe 41. The output end of the exhaust pipe 41 is connected to the input end of the vacuum pump 43.

[0030] Support base 11 supports detection chamber 12. By opening sealing door 13, the electronic fuel injection engine fuel pump is placed inside detection chamber 12. Sensor 14 detects the airtightness of electronic fuel injection engine fuel pump. Two sets of sliding grooves 21 support two sets of lead screws 22 respectively. By starting motor 26 and driving transmission belt 25, two sets of drive shafts 24 are rotated respectively. The rotation of two sets of drive shafts 24 causes two sets of lead screws 22 to rotate respectively. Guided by two sets of sliding grooves 21, two sets of sliders 23 move on two sets of lead screws 22 respectively, causing fixing mechanism 03 to move. Support plate 31 supports two sets of electric cylinders 32 respectively. By extending two sets of electric cylinders 32 respectively, the electronic fuel injection engine fuel pump is fixed by two sets of fixing plates 33. By starting vacuum pump 43, gas in detection chamber 12 is discharged through exhaust pipe 41. By closing valve 42, gas is prevented from entering detection chamber 12, improving the practicality of the equipment.

[0031] Example 2

[0032] like Figure 6 and Figure 7As shown, based on Embodiment 1, it also includes a condensing mechanism 05 and a gas supply mechanism 06. The condensing mechanism 05 includes a drying tube 51, a heat exchanger 52, a circulating pump 53, a refrigeration box 54, a filter plate 55, a baffle plate 56, a drain pipe 57, and a collection tank 58. The heat exchanger 52 is installed on the outer wall of the drying tube 51. The output end of the heat exchanger 52 is connected to the input end of the circulating pump 53. The output end of the circulating pump 53 is connected to the input end of the refrigeration box 54. The output end of the refrigeration box 54 is connected to the input end of the heat exchanger 52. The filter plate 55 and the baffle plate 56 are both installed on the inner wall of the drying tube 51. The filter plate 55 is located to the right of the baffle plate 56. The input end of the drain pipe 57 is installed on the outer wall of the drying tube 51. The drain pipe 57 is located on the baffle plate. Below 56, the output end of the drain pipe 57 is connected to the input end of the collection tank 58; the air supply mechanism 06 includes a first pipe 61, a heating box 62, an air pump 63, a second pipe 64, a connector 65, and a bracket 66. The input end of the first pipe 61 is connected to the output end of the drying pipe 51, the output end of the first pipe 61 is connected to the input end of the heating box 62, the output end of the heating box 62 is connected to the input end of the air pump 63, the output end of the air pump 63 is connected to the input end of the second pipe 64, the output end of the second pipe 64 is connected to the input end of the connector 65, the output end of the connector 65 is connected to the input end of the electronic fuel injection engine fuel pump, and the connector 65 is located inside the detection chamber 12. The bottom ends of the heating box 62 and the air pump 63 are both mounted on the top of the bracket 66.

[0033] Air is discharged into the drying pipe 51 by activating the air supply mechanism 06. The filter plate 55 filters impurities in the air. The liquid in the heat exchanger 52 is discharged into the refrigeration box 54 by activating the circulation pump 53. The refrigerated liquid is discharged into the heat exchanger 52 to condense the air in the drying pipe 51. The condensed liquid is discharged into the collection tank 58 through the drain pipe 57 via the baffle plate 56. Air is discharged into the condensation mechanism 05 through the second pipe 64 for condensation. The dried gas is discharged into the heating box 62 through the first pipe 61. The gas is heated to the specified temperature by activating the heating box 62. The heated gas is discharged into the fuel pump of the electronic fuel injection engine through the second pipe 64 to the connector 65 for air tightness testing. The bracket 66 supports the heating box 62 and the air pump 63, improving the practicality of the equipment.

[0034] like Figures 1 to 7As shown, this utility model discloses a fuel pump sealing performance testing device for an electronic fuel injection engine. During operation, the support base 11 first supports the testing chamber 12. The fuel pump is placed inside the testing chamber 12 by opening the sealing door 13. Then, two sets of sliding grooves 21 support two sets of lead screws 22. The starting motor 26, via the conveyor belt 25, rotates two sets of drive shafts 24, which in turn rotate the two sets of lead screws 22. Guided by the two sets of sliding grooves 21, two sets of sliders 23 move on the two sets of lead screws 22, causing the fixing mechanism 03 to move. Next, the support plate 31 supports two sets of electric cylinders 32. The fuel pump is fixed by extending the two sets of electric cylinders 32 via two sets of fixing plates 33. Then, by starting the vacuum pump 43, the gas in the testing chamber 12 is discharged through the exhaust pipe 41. The valve 42 is closed to prevent gas from entering. The air enters the detection chamber 12, and then the air supply mechanism 06 is activated to discharge air into the drying tube 51. The filter plate 55 filters impurities in the air. The circulation pump 53 is activated to discharge the liquid in the heat exchanger 52 into the refrigeration box 54 for cooling. The cooled liquid is discharged into the heat exchanger 52 to condense the air in the drying tube 51. The condensed liquid passes through the baffle plate 56 to the drain pipe 57 and is discharged into the collection bucket 58. Finally, the air is discharged into the condensation mechanism 05 through the second pipe 64 for condensation. The dried gas is discharged into the heating box 62 through the first pipe 61. The heating box 62 is activated to heat the gas to the specified temperature. The heated gas passes through the second pipe 64 to the connector 65 and is discharged into the electronic fuel injection engine fuel pump. The sensor 14 detects the air tightness of the electronic fuel injection engine fuel pump. The bracket 66 supports the heating box 62 and the air pump 63 to improve the practicality of the equipment.

[0035] The sensor 14, motor 26, electric cylinder 32, vacuum pump 43, circulation pump 53, refrigeration box 54, heating box 62, and air pump 63 of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0036] The main function of this utility model is to discharge air into the condensation mechanism 05 by activating the air supply mechanism 06, discharge impurities and water vapor in the air through the condensation mechanism 05, and discharge the dried gas into the air supply mechanism 06 for heating. The heated gas is then discharged into the fuel pump of the electronic fuel injection engine for testing, thereby improving the practicality of the equipment.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A fuel pump sealing performance testing device for an electronic fuel injection engine, comprising a support mechanism (01); characterized in that, It also includes a moving mechanism (02), a fixing mechanism (03), an exhaust mechanism (04), a condensing mechanism (05), and an air supply mechanism (06). The moving mechanism (02) is installed inside the supporting mechanism (01), the fixing mechanism (03) is installed on the moving mechanism (02), the exhaust mechanism (04) is installed on top of the supporting mechanism (01), the condensing mechanism (05) and the air supply mechanism (06) are both installed on the supporting mechanism (01), the air supply mechanism (06) is located to the left of the condensing mechanism (05), and the air supply mechanism (06) is connected to the supporting mechanism (01).

2. The electronic fuel injection engine fuel pump sealing performance testing device as described in claim 1, characterized in that, The support mechanism (01) includes a support base (11), a detection chamber (12), a sealing door (13), and a sensor (14). The detection chamber (12) is installed on the top of the support base (11), the sealing door (13) is installed on the left side wall of the detection chamber (12), and the top of the sensor (14) is installed on the top inner wall of the detection chamber (12).

3. The fuel pump sealing performance testing device for an electronic fuel injection engine as described in claim 2, characterized in that, The moving mechanism (02) includes two sets of slides (21), two sets of lead screws (22), two sets of sliders (23), two sets of drive shafts (24), a conveyor belt (25), and a motor (26). The bottom ends of the two sets of slides (21) are respectively installed on the bottom end of the inner wall of the detection chamber (12). The two sets of slides (21) are respectively installed inside the two sets of slides (21). The interior of the two sets of sliders (23) is respectively slidably installed on the two sets of lead screws (22). The exterior of the two sets of sliders (23) is respectively slidably installed on the inner wall of the two sets of slides (21). The inner rings of the two sets of drive shafts (24) are respectively installed on the right side of the two sets of lead screws (22). The conveyor belt (25) is fitted on the two sets of drive shafts (24). The output end of the motor (26) is connected to the right end of one of the lead screws (22).

4. The fuel pump sealing performance testing device for an electronic fuel injection engine as described in claim 3, characterized in that, The fixing mechanism (03) includes a support plate (31), two sets of electric cylinders (32) and two sets of fixing plates (33). The bottom end of the support plate (31) is mounted on two sets of sliders (23), and the top end of the support plate (31) is provided with a mounting plate. The fixed ends of the two sets of electric cylinders (32) are respectively mounted on the baffles at the top end of the support plate (31), and the two sets of fixing plates (33) are respectively mounted on the moving ends of the two sets of electric cylinders (32).

5. The fuel pump sealing performance testing device for an electronic fuel injection engine as described in claim 2, characterized in that, The exhaust mechanism (04) includes an exhaust pipe (41), a valve (42) and a vacuum pump (43). The input end of the exhaust pipe (41) is connected to the top of the detection chamber (12). The valve (42) is installed on the exhaust pipe (41). The output end of the exhaust pipe (41) is connected to the input end of the vacuum pump (43).

6. The fuel pump sealing performance testing device for an electronic fuel injection engine as described in claim 1, characterized in that, The condensation mechanism (05) includes a drying tube (51), a heat exchanger (52), a circulating pump (53), a refrigeration box (54), a filter plate (55), a baffle plate (56), a drain pipe (57), and a collection tank (58). The heat exchanger (52) is installed on the outer wall of the drying tube (51). The output end of the heat exchanger (52) is connected to the input end of the circulating pump (53). The output end of the circulating pump (53) is connected to the input end of the refrigeration box (54). The output end of the refrigeration box (54) is connected to the input end of the heat exchanger (52). The filter plate (55) and the baffle plate (56) are both installed on the inner wall of the drying tube (51). The filter plate (55) is located on the right side of the baffle plate (56). The input end of the drain pipe (57) is installed on the outer wall of the drying tube (51). The drain pipe (57) is located below the baffle plate (56). The output end of the drain pipe (57) is connected to the input end of the collection tank (58).

7. The fuel pump sealing performance testing device for an electronic fuel injection engine as described in claim 6, characterized in that, The gas supply mechanism (06) includes a first pipe (61), a heating box (62), an air pump (63), a second pipe (64), a connector (65), and a bracket (66). The input end of the first pipe (61) is connected to the output end of the drying pipe (51), the output end of the first pipe (61) is connected to the input end of the heating box (62), the output end of the heating box (62) is connected to the input end of the air pump (63), the output end of the air pump (63) is connected to the input end of the second pipe (64), the output end of the second pipe (64) is connected to the input end of the connector (65), the output end of the connector (65) is connected to the input end of the fuel pump of the electronic fuel injection engine, and the connector (65) is located inside the detection chamber (12). The bottom ends of the heating box (62) and the air pump (63) are both installed on the top of the bracket (66).

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