Engine cleaning device
By designing an engine cleaning device that includes an oil tank, power module, diaphragm pump, check valve, accumulator, and pressure detection module, the problems of inaccurate pressure control and equipment damage during the cleaning process were solved, achieving stability and reliability in cleaning.
Patent Information
- Application Number
- CN202520060207.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Existing engine cleaning devices are unable to effectively remove stubborn dirt from guide vane adjusters, and the pressure control during the cleaning process is inaccurate, which can easily damage mechanical parts.
An engine cleaning device is designed, comprising an oil tank, a power module, a diaphragm pump, a check valve, an accumulator, a pressure detection module, and an unloading valve. The pressure detection module detects the pressure at the output of the diaphragm pump to ensure that the pressure during the cleaning process is within a safe range. The unloading valve and the check valve prevent excessive pressure from damaging the equipment. The accumulator maintains stable pressure, and the check valve prevents the cleaning oil from flowing back.
It improves the stability and reliability of engine cleaning, protects equipment from damage, and ensures the continuity of cleaning results and process.
Smart Images
Figure CN223794236U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of engine cleaning technology, and in particular to an engine cleaning device. Background Technology
[0002] With the rapid development of modern industrial technology, engines play an indispensable role in various key fields, from automobiles and ships in transportation to aircraft propulsion systems in aerospace, and then to industrial power generation. The stable operation of engines is the cornerstone of ensuring the efficient operation of the entire system. However, during long-term operation, the guide vane adjuster of the engine, as a key component for controlling airflow, is extremely susceptible to fouling.
[0003] During use, due to the oil-air mixture environment inside the engine, oil stains easily adhere to the surface of the mechanical parts of the blade adjuster. Over time, this not only increases the frictional resistance between the parts, affecting the accuracy and response speed of blade adjustment, but may also lead to accelerated wear of mechanical parts and shorten their service life.
[0004] Cleaning personnel often find it difficult to reach the tiny crevices and connections inside the regulator for thorough cleaning using conventional tools. Simple cleaning devices often lack designs adapted to the special structure and materials of the blade regulator, and the pressure during the cleaning process cannot be precisely controlled, making it impossible to effectively remove stubborn dirt. At the same time, excessive pressure can cause irreversible damage to the components.
[0005] Therefore, there is an urgent need for a stable and reliable engine cleaning device. Utility Model Content
[0006] This disclosure provides an engine cleaning device to address the problem of low stability and reliability in engine cleaning.
[0007] This disclosure provides an engine cleaning device, including: an oil reservoir, a power module, a first switch, a switch control module, a diaphragm pump, a one-way valve, an accumulator, a fuel injection module, a pressure detection module, and an unloading valve;
[0008] The output end of the oil reservoir is connected to the input end of the diaphragm pump via a pipeline;
[0009] The first terminal of the first switch is connected to the power supply module, the second terminal of the first switch is connected to the power supply terminal of the diaphragm pump, and the control terminal of the first switch is connected to the switch control module.
[0010] A check valve is installed in the pipeline between the output end of the diaphragm pump and the output end of the fuel injection module.
[0011] An accumulator is installed in the pipeline between the check valve and the input end of the fuel injection module;
[0012] The pressure detection module is configured to detect the pressure at the output of the diaphragm pump;
[0013] The control end of the unloading valve is connected to the output end of the pressure detection module, the input end of the unloading valve is connected to the output end of the diaphragm pump, and the output end of the unloading valve is connected to the recovery port of the oil storage tank.
[0014] In one exemplary embodiment of this disclosure, the pressure detection module includes: a pressure sensor interface U8, a capacitor C4, a resistor RF, an operational amplifier U1, a resistor R2, a resistor R3, a resistor R4, a sliding resistor RP1, an operational amplifier U2, an operational amplifier U3, a NAND gate U4, a NAND gate U5, a NAND gate U6, a NAND gate U7, a resistor R5, a transistor Q1, and a diode D1;
[0015] The first and second ends of the pressure sensor interface U8 are both used to connect to the first pressure sensor; the first pressure sensor is set in the pipeline between the output end of the diaphragm pump and the check valve; the third end of the pressure sensor interface U8 is connected to the non-inverting input end of the operational amplifier U1; and the fourth end of the pressure sensor interface U8 is used to connect to the power supply.
[0016] The output terminal of operational amplifier U1 is connected to the inverting input terminal of operational amplifier U1 through resistor RF;
[0017] The first terminal of capacitor C4 is connected to the first terminal of resistor RF, and the second terminal of capacitor C4 is connected to the second terminal of resistor RF.
[0018] The output terminal of operational amplifier U1 is connected to the inverting input terminal of operational amplifier U2 and the non-inverting input terminal of operational amplifier U3, respectively. The output terminal of operational amplifier U1 is grounded through resistor R2.
[0019] The non-inverting input of operational amplifier U2 is connected to the first terminals of resistors R3 and R4, respectively; the second terminal of resistor R3 is used to connect to the power supply; the second terminal of resistor R4 is grounded through sliding resistor RP1.
[0020] The inverting input terminal of operational amplifier U3 is connected to the second terminal of resistor R4;
[0021] The first and second input terminals of NAND gate U4 are both connected to the output terminal of operational amplifier U2; the output terminal of NAND gate U4 is connected to the first input terminal of NAND gate U6.
[0022] The first and second input terminals of NAND gate U5 are both connected to the output terminal of operational amplifier U3; the output terminal of NAND gate U5 is connected to the first input terminal of NAND gate U7.
[0023] The output of NAND gate U6 is connected to the second input of NAND gate U7, and the second input of NAND gate U6 is connected to the output of NAND gate U7.
[0024] The output of NAND gate U7 is connected to the base of transistor Q1 through resistor R5;
[0025] The emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to the anode of diode D1, and the cathode of diode D1 is used to connect to the power supply.
[0026] The collector of transistor Q1 is connected to the first end of the control coil of the unloading valve, and the second end of the control coil of the unloading valve is used to connect to the power supply.
[0027] In one exemplary embodiment of this disclosure, the pressure detection module further includes: a resistor R1, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R6, and a light-emitting diode L1;
[0028] The first end of resistor R1 is connected to the fourth end of pressure sensor interface U8, and the second end of resistor R1 is connected to the first end of capacitor C1, the first end of capacitor C2, the first end of capacitor C3 and the inverting input of operational amplifier U1 respectively.
[0029] The second terminals of capacitors C1, C2, and C3 are all connected to the non-inverting input terminal of operational amplifier U1.
[0030] The anode of LED L1 is connected to the output of NAND gate U7 through resistor R6, and the cathode of LED L1 is grounded.
[0031] In one exemplary embodiment of this disclosure, an engine cleaning device further includes: a pressure sensor and a liquid level sensor;
[0032] The pressure sensor is configured to detect the pressure at the input of the fuel injection module;
[0033] The level sensor is connected to the oil tank;
[0034] The level sensor is configured to detect the liquid level inside the oil tank.
[0035] In one exemplary embodiment of this disclosure, the fuel injection module includes: a fuel injection nozzle and a camera;
[0036] The input end of the fuel injector is connected to the output end of the diaphragm pump via a check valve;
[0037] The camera is located outside the fuel injector.
[0038] In one exemplary embodiment of this disclosure, an engine cleaning device further includes: a manual valve;
[0039] The manual valve is installed in the pipeline between the output end of the accumulator and the input end of the fuel injection module.
[0040] In one exemplary embodiment of this disclosure, an engine cleaning device further includes: a display module;
[0041] The display module is connected to the level sensor, pressure sensor, and camera, respectively.
[0042] In one exemplary embodiment of this disclosure, an engine cleaning device further includes: a storage module;
[0043] The storage module is connected to the camera;
[0044] The storage module is configured to store video information from the camera.
[0045] The beneficial effects of the engine cleaning device provided in this embodiment are as follows:
[0046] This disclosure uses a pressure detection module to monitor the pressure at the output of the diaphragm pump, ensuring that the pressure during the cleaning process remains within a safe range. When the pressure in the pipeline is too high, the unloading valve will open in a controlled manner, returning some of the cleaning oil to the reservoir, preventing excessive impact on the engine and protecting the equipment from damage. The accumulator can release stored energy when the diaphragm pump's pressure supply is insufficient or when additional energy is needed, maintaining stable pipeline pressure, ensuring stable pressure during the cleaning process, and improving the cleaning effect and equipment reliability. The one-way valve effectively prevents the cleaning oil in the pipeline from flowing back when the pressure changes, ensuring the continuity and stability of the cleaning process, and improving the stability and reliability of engine cleaning. Attached Figure Description
[0047] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0048] Figure 1 This is a schematic diagram of the structure of an engine cleaning device provided in an embodiment of this disclosure;
[0049] Figure 2 This is a schematic diagram of the structure of a pressure detection module provided in an embodiment of this disclosure;
[0050] Figure 3 This is a schematic diagram of the structure of the second type of engine cleaning device provided in the embodiments of this disclosure. Detailed Implementation
[0051] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.
[0052] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.
[0053] The implementation of this disclosure will be described in detail below with reference to the specific accompanying drawings:
[0054] Figure 1 This is a schematic diagram of an engine cleaning device provided in an embodiment of this disclosure. (Refer to...) Figure 1 The engine cleaning device includes: an oil tank 10, a power module 11, a first switch 12, a switch control module 13, a diaphragm pump 14, a one-way valve 15, an accumulator 16, an injection module 17, a pressure detection module 18, and an unloading valve 19.
[0055] The output end of the oil reservoir 10 is connected to the input end of the diaphragm pump 14 via a pipeline;
[0056] The first end of the first switch 12 is connected to the power module 11, the second end of the first switch 12 is connected to the power supply end of the diaphragm pump 14, and the control end of the first switch 12 is connected to the switch control module 13.
[0057] A check valve 15 is installed in the pipeline between the output end of the diaphragm pump 14 and the output end of the fuel injection module 17.
[0058] An accumulator 16 is installed in the pipeline between the one-way valve 15 and the input end of the fuel injection module 17;
[0059] Pressure detection module 18 is configured to detect the pressure at the output of diaphragm pump 14;
[0060] The control end of the unloading valve 19 is connected to the output end of the pressure detection module 18, the input end of the unloading valve 19 is connected to the output end pipeline of the diaphragm pump 14, and the output end of the unloading valve 19 is connected to the recovery port pipeline of the oil storage tank 10.
[0061] In this embodiment, the switch control module 13 can be a switch button or a switch knob, etc. The switch control module 13 is configured to receive external switch information. For example, when cleaning is required, the cleaning personnel press the switch button. At this time, the switch control module 13 controls the first switch 12 to close. The power module 11 then connects to the power supply terminal of the diaphragm pump 14, and the diaphragm pump 14 starts working. The diaphragm pump 14 draws cleaning oil from the oil storage tank 10 and transmits it to the oil injection module 17 through the one-way valve 15. The oil injection module 17 contains an oil injection port 171, which can... The engine guide adjuster (guide adjuster) is cleaned through the fuel injector 171. During this process, if the pressure in the pipeline is too high, it may exert a large impact force on the engine guide adjuster, causing damage. The pressure detection module 18 can adjust the opening of the unloading valve 19 according to the detected pressure value. When the pressure value in the pipeline is within the normal range, the valve of the unloading valve 19 does not open. When the pressure value in the pipeline is too high, the pressure detection module 18 controls the unloading valve 19 to open, at which time a portion of the cleaning oil returns to the oil reservoir 10 through the unloading valve 19. The engine guide adjuster cleaning device is a general-purpose equipment for cleaning engine guide adjusters on the ground. It is mainly used to clean the engine guide adjuster after the engine has been affected by wind, sand, industrial dust pollution, and salt spray environment.
[0062] One-way valve 15 is configured to prevent backflow of cleaning oil in the pipeline. Accumulator 16 is a device capable of storing energy. When diaphragm pump 14 supplies pressure to injection module 17 and the pressure is higher than the pressure inside accumulator 16, cleaning oil enters accumulator 16 through the inlet, compressing the internal gas. As cleaning oil continues to enter, the gas volume decreases and the pressure increases, storing hydraulic energy in the form of gas compression energy. When the pipeline pressure drops, for example, when hydraulic diaphragm pump 14 needs additional energy to complete its work, or when diaphragm pump 14 supplies insufficient pressure, the high-pressure gas inside accumulator 16 expands, expelling the stored hydraulic oil or compressed air to replenish the system, releasing energy to maintain stable pipeline pressure.
[0063] Meanwhile, the one-way valve 15 can prevent the backflow of cleaning oil when the accumulator 16 outputs pressure.
[0064] As can be seen from the above, this disclosure uses the pressure detection module 18 to detect the pressure at the output end of the diaphragm pump 14, ensuring that the pressure during the cleaning process remains within a safe range. When the pressure in the pipeline is too high, the unloading valve 19 will open in a controlled manner, returning some of the cleaning oil to the oil reservoir 10, avoiding excessive impact on the engine interior and protecting the equipment from damage. The accumulator 16 can release stored energy when the diaphragm pump 14 supplys insufficient pressure or requires additional energy, maintaining stable pipeline pressure, ensuring stable pressure during the cleaning process, and improving the cleaning effect and equipment reliability. The one-way valve 15 effectively prevents the cleaning oil in the pipeline from flowing back when the pressure changes, ensuring the continuity and stability of the cleaning process, and improving the stability and reliability of engine cleaning.
[0065] Figure 2 This is a schematic diagram of the structure of a pressure detection module 18 provided in an embodiment of this disclosure, with reference to... Figure 2 .
[0066] In one embodiment of this disclosure, the pressure detection module 18 includes: a pressure sensor interface U8, a capacitor C4, a resistor RF, an operational amplifier U1, a resistor R2, a resistor R3, a resistor R4, a sliding resistor RP1, an operational amplifier U2, an operational amplifier U3, a NAND gate U4, a NAND gate U5, a NAND gate U6, a NAND gate U7, a resistor R5, a transistor Q1, and a diode D1;
[0067] The first and second ends of the pressure sensor interface U8 are both used to connect to the first pressure sensor; the first pressure sensor is set in the pipeline between the output end of the diaphragm pump 14 and the one-way valve 15; the third end of the pressure sensor interface U8 is connected to the non-inverting input end of the operational amplifier U1; and the fourth end of the pressure sensor interface U8 is used to connect to the power supply.
[0068] The output terminal of operational amplifier U1 is connected to the inverting input terminal of operational amplifier U1 through resistor RF;
[0069] The first terminal of capacitor C4 is connected to the first terminal of resistor RF, and the second terminal of capacitor C4 is connected to the second terminal of resistor RF.
[0070] The output terminal of operational amplifier U1 is connected to the inverting input terminal of operational amplifier U2 and the non-inverting input terminal of operational amplifier U3, respectively. The output terminal of operational amplifier U1 is grounded through resistor R2.
[0071] The non-inverting input of operational amplifier U2 is connected to the first terminals of resistors R3 and R4, respectively; the second terminal of resistor R3 is used to connect to the power supply; the second terminal of resistor R4 is grounded through sliding resistor RP1.
[0072] The inverting input terminal of operational amplifier U3 is connected to the second terminal of resistor R4;
[0073] The first and second input terminals of NAND gate U4 are both connected to the output terminal of operational amplifier U2; the output terminal of NAND gate U4 is connected to the first input terminal of NAND gate U6.
[0074] The first and second input terminals of NAND gate U5 are both connected to the output terminal of operational amplifier U3; the output terminal of NAND gate U5 is connected to the first input terminal of NAND gate U7.
[0075] The output of NAND gate U6 is connected to the second input of NAND gate U7, and the second input of NAND gate U6 is connected to the output of NAND gate U7.
[0076] The output of NAND gate U7 is connected to the base of transistor Q1 through resistor R5;
[0077] The emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to the anode of diode D1, and the cathode of diode D1 is used to connect to the power supply.
[0078] The collector of transistor Q1 is connected to the first end of the control coil of unloading valve 19, and the second end of the control coil of unloading valve 19 is used to connect to the power supply.
[0079] In one embodiment of this disclosure, the pressure detection module 18 further includes: a resistor R1, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R6, and a light-emitting diode L1;
[0080] The first end of resistor R1 is connected to the fourth end of pressure sensor interface U8, and the second end of resistor R1 is connected to the first end of capacitor C1, the first end of capacitor C2, the first end of capacitor C3 and the inverting input of operational amplifier U1 respectively.
[0081] The second terminals of capacitors C1, C2, and C3 are all connected to the non-inverting input terminal of operational amplifier U1.
[0082] The anode of LED L1 is connected to the output of NAND gate U7 through resistor R6, and the cathode of LED L1 is grounded.
[0083] In this embodiment, the first and second ends of connector U8 are connected to the first pressure sensor. The first pressure sensor is installed in the pipeline between the output end of diaphragm pump 14 and check valve 15. The pressure signal detected by the first pressure sensor is filtered by resistor R1, capacitor C1, capacitor C2 and capacitor C3 and then connected to the non-inverting input and inverting input of operational amplifier U1. The pressure signal amplified by operational amplifier U1 is output to the inverting input of operational amplifier U2 and the non-inverting input of operational amplifier U3, respectively.
[0084] In this embodiment, the upper and lower pressure limits can be controlled by adjusting the sliding resistor RP1. The non-inverting input of operational amplifier U2 represents the lower pressure limit, and the inverting input of operational amplifier U3 represents the upper pressure limit. When the pressure in the pipeline between the output of diaphragm pump 14 and check valve 15 reaches the upper pressure limit, the output of operational amplifier U3 outputs 1, NAND gate U5 outputs 0, NAND gate U4 outputs 0, NAND gate U6 outputs 1, and NAND gate U7 outputs 1, which is a high level. At this time, transistor Q1 is turned on, LED L1 lights up, and the power supply is connected to the control coil of unloading valve 19, controlling unloading valve 19 to open until the pressure detected by pressure sensor 20 reaches the lower pressure limit. At this time, NAND gate U7 outputs 0, and transistor Q1 is turned off.
[0085] As can be seen from the above, this disclosure captures pressure changes within the pipeline by connecting the first pressure sensor to the pressure sensor interface U8. The upper and lower pressure limits are adjusted via the sliding resistor RP1, allowing precise control of the permissible pressure range within the pipeline. When the pressure within the pipeline exceeds the preset upper limit, a NAND gate logic circuit responds quickly, outputting a control signal to control the control coil of the unloading valve 19, thereby opening and closing the unloading valve 19 and effectively protecting the pipeline and engine cleaning device from excessive pressure. The addition of components such as resistor R1, capacitors C1, C2, and C3 filters out noise interference in the pressure signal, improving the circuit's anti-interference capability and stability, and enhancing the stability and reliability of the engine cleaning process.
[0086] Figure 3 This is a schematic diagram of the structure of the second type of engine cleaning device provided in the embodiments of this disclosure, with reference to... Figure 3 In one embodiment of this disclosure, an engine cleaning device further includes: a pressure sensor 20 and a liquid level sensor 21;
[0087] Pressure sensor 20 is configured to detect the pressure at the input of fuel injection module 17;
[0088] The liquid level sensor 21 is connected to the oil storage tank 10;
[0089] The liquid level sensor 21 is configured to detect the liquid level inside the oil reservoir 10.
[0090] In one embodiment of this disclosure, the fuel injection module 17 includes: a fuel injection port 171 and a camera 172;
[0091] The input end of the fuel injector 171 is connected to the output end of the diaphragm pump 14 via a one-way valve 15;
[0092] The camera 172 is located outside the fuel injector 171.
[0093] In one embodiment of this disclosure, an engine cleaning device further includes: a display module 23;
[0094] The display module 23 is connected to the liquid level sensor 21, the pressure sensor 20, and the camera 172, respectively.
[0095] In this embodiment, the pressure sensor 20 can detect the pressure at the output end of the fuel injector 171 and send it to the display module 23, allowing cleaning personnel to observe whether the pressure value is within the normal range. The level sensor 21 can detect the liquid level in the oil tank 10 and send it to the display module 23, allowing cleaning personnel to replenish cleaning oil in a timely manner. The camera 172 can be installed outside the fuel injector 171 and send the detected images to the display module 23, allowing users to observe the cleaning status of the cleaning area and monitor the cleaning effect at any time. The power supply can be an external power source or a built-in battery.
[0096] As can be seen from the above, this disclosure utilizes pressure sensor 20 to detect the pressure at the input end of fuel injection module 17, ensuring stable pressure and compliance with cleaning requirements during the cleaning process. Level sensor 21 continuously monitors the fuel level inside reservoir 10, facilitating timely replenishment by cleaning personnel and ensuring the continuity and efficiency of the cleaning operation. Display module 23 is connected to pressure sensor 20, level sensor 21, and camera 172 respectively, enabling visualization of the cleaning process. Cleaning personnel can intuitively obtain the current pressure value, fuel level, and images of the cleaning area from display module 23, improving the stability and reliability of engine cleaning.
[0097] In one embodiment of this disclosure, an engine cleaning device further includes: a manual valve 22;
[0098] The manual valve 22 is installed in the pipeline between the output end of the accumulator 16 and the input end of the fuel injection module 17.
[0099] In one embodiment of this disclosure, an engine cleaning device further includes: a storage module 24;
[0100] Storage module 24 is connected to camera 172;
[0101] Storage module 24 is configured to store video information from camera 172.
[0102] In this embodiment, when cleaning is required, the cleaning personnel can manually open the manual valve 22 and close the manual valve 22 after cleaning to prevent the equipment from being started accidentally or due to operational errors, which could lead to waste of cleaning oil and other damage.
[0103] The storage module 24 can store the image and video information acquired by the camera 172 as video of the cleaning work for later use.
[0104] As can be seen from the above, this disclosure, through the setting of manual valve 22, allows cleaning personnel to precisely control the start and end of the cleaning process as needed. Before the cleaning work begins, the valve is manually opened to ensure that the cleaning oil can flow smoothly to the fuel injection module 17; after cleaning, the valve is closed in time, effectively preventing accidental start-up or operational errors of the equipment, avoiding waste of cleaning oil, and protecting the equipment from unnecessary damage. The storage module 24 can record the video information of the cleaning process captured by the camera 172, which facilitates subsequent evaluation of cleaning effect, troubleshooting, and employee training, thereby improving the stability and reliability of engine cleaning.
[0105] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.
Claims
1. An engine cleaning device, characterized in that, include: Oil reservoir, power module, first switch, switch control module, diaphragm pump, check valve, accumulator, fuel injection module, pressure detection module and unloading valve; The output end of the oil storage tank is connected to the input end of the diaphragm pump via a pipeline. The first terminal of the first switch is connected to the power module, the second terminal of the first switch is connected to the power supply terminal of the diaphragm pump, and the control terminal of the first switch is connected to the switch control module. The one-way valve is installed in the pipeline between the output end of the diaphragm pump and the output end of the fuel injection module. The accumulator is installed in the pipeline between the one-way valve and the input end of the fuel injection module; The pressure detection module is configured to detect the pressure at the output end of the diaphragm pump; The control terminal of the unloading valve is connected to the output terminal of the pressure detection module, the input terminal of the unloading valve is connected to the output terminal pipeline of the diaphragm pump, and the output terminal of the unloading valve is connected to the recovery port pipeline of the oil storage tank.
2. The engine cleaning device as described in claim 1, characterized in that, The pressure detection module includes: a pressure sensor interface U8, a capacitor C4, a resistor RF, an operational amplifier U1, a resistor R2, a resistor R3, a resistor R4, a sliding resistor RP1, an operational amplifier U2, an operational amplifier U3, a NAND gate U4, a NAND gate U5, a NAND gate U6, a NAND gate U7, a resistor R5, a transistor Q1, and a diode D1. The first and second ends of the pressure sensor interface U8 are both used to connect to the first pressure sensor; the first pressure sensor is disposed in the pipeline between the output end of the diaphragm pump and the one-way valve; the third end of the pressure sensor interface U8 is connected to the non-inverting input end of the operational amplifier U1; and the fourth end of the pressure sensor interface U8 is used to connect to the power supply. The output terminal of the operational amplifier U1 is connected to the inverting input terminal of the operational amplifier U1 through the resistor RF; The first terminal of capacitor C4 is connected to the first terminal of resistor RF, and the second terminal of capacitor C4 is connected to the second terminal of resistor RF; The output terminal of the operational amplifier U1 is connected to the inverting input terminal of the operational amplifier U2 and the non-inverting input terminal of the operational amplifier U3, respectively, and the output terminal of the operational amplifier U1 is grounded through the resistor R2; The non-inverting input terminal of the operational amplifier U2 is connected to the first terminal of the resistor R3 and the first terminal of the resistor R4, respectively; the second terminal of the resistor R3 is used to connect to the power supply; the second terminal of the resistor R4 is grounded through the sliding resistor RP1. The inverting input terminal of the operational amplifier U3 is connected to the second terminal of the resistor R4; The first and second input terminals of the NAND gate U4 are both connected to the output terminal of the operational amplifier U2; the output terminal of the NAND gate U4 is connected to the first input terminal of the NAND gate U6. The first and second input terminals of the NAND gate U5 are both connected to the output terminal of the operational amplifier U3; the output terminal of the NAND gate U5 is connected to the first input terminal of the NAND gate U7. The output terminal of NAND gate U6 is connected to the second input terminal of NAND gate U7, and the second input terminal of NAND gate U6 is connected to the output terminal of NAND gate U7; The output terminal of the NAND gate U7 is connected to the base of the transistor Q1 through the resistor R5; The emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to the anode of diode D1, and the cathode of diode D1 is used to connect to the power supply. The collector of the transistor Q1 is connected to the first end of the control coil of the unloading valve, and the second end of the control coil of the unloading valve is used to connect to the power supply.
3. The engine cleaning device as described in claim 2, characterized in that, The pressure detection module also includes: resistor R1, capacitor C1, capacitor C2, capacitor C3, resistor R6, and light-emitting diode L1; The first end of the resistor R1 is connected to the fourth end of the pressure sensor interface U8, and the second end of the resistor R1 is connected to the first end of the capacitor C1, the first end of the capacitor C2, the first end of the capacitor C3 and the inverting input of the operational amplifier U1 respectively. The second terminals of capacitor C1, capacitor C2, and capacitor C3 are all connected to the non-inverting input terminal of operational amplifier U1. The anode of the light-emitting diode L1 is connected to the output terminal of the NAND gate U7 through the resistor R6, and the cathode of the light-emitting diode L1 is grounded.
4. The engine cleaning device as described in claim 1, characterized in that, Also includes: Pressure sensors and level sensors; The pressure sensor is configured to detect the pressure at the input of the fuel injection module; The liquid level sensor is connected to the oil storage tank; The liquid level sensor is configured to detect the liquid level inside the oil tank.
5. The engine cleaning device as described in claim 4, characterized in that, The fuel injection module includes: a fuel injection nozzle and a camera; The input end of the fuel injector is connected to the output end of the diaphragm pump via the one-way valve; The camera is located outside the fuel injector.
6. The engine cleaning device as described in claim 1, characterized in that, Also includes: Manual valve; The manual valve is located in the pipeline between the output end of the accumulator and the input end of the fuel injection module.
7. The engine cleaning device as described in claim 5, characterized in that, Also includes: Display module; The display module is connected to the liquid level sensor, the pressure sensor and the camera respectively.
8. An engine cleaning device as described in claim 5, characterized in that, Also includes: Storage module; The storage module is connected to the camera; The storage module is configured to store video information from the camera.