A gasoline-powered cleaning machine and a control method thereof

Abstract

This invention relates to a gasoline-powered cleaning machine and its control method, belonging to the field of industrial cleaning equipment technology. It includes a delivery pump with a pump chamber for converting atmospheric pressure water into a high-pressure water jet, an engine for driving the delivery pump, and a fuel tank for storing and supplying gasoline. A drain valve is installed on the delivery pump to discharge residual water from the pump chamber, with one end of the drain valve connected to the lowest point of the pump chamber. This invention reduces manual operation steps after cleaning and shortens operation time.

Description

Technical Field

[0001] This invention relates to the field of industrial cleaning equipment technology, and in particular to a gasoline-powered cleaning machine and its control method. Background Technology

[0002] Gasoline high-pressure cleaners are widely used in industrial and commercial fields such as construction machinery cleaning, mining equipment maintenance, and outdoor site cleaning due to their powerful performance and lack of external power supply.

[0003] In practical applications, after the cleaning machine finishes its operation, some moisture will inevitably remain in the pump chamber, plunger gap, check valve passage, and high-pressure pipeline of the delivery pump. When the ambient temperature drops below 0℃, the residual moisture is very likely to freeze, which will lead to a series of equipment failures. At present, the means of low-temperature protection for cleaning machines are mostly manual operations, such as manually disassembling the pipeline to drain the accumulated water after the operation.

[0004] However, the manual cleaning process is cumbersome, increasing the number of manual steps after the cleaning operation and extending the operation time. Summary of the Invention

[0005] To reduce manual operations after cleaning and shorten operation time, this invention provides a gasoline-powered cleaning machine and its control method.

[0006] In a first aspect, the present invention provides a gasoline-powered cleaning machine, which adopts the following technical solution: A gasoline-powered cleaning machine includes a delivery pump having a pump chamber for converting atmospheric pressure water into a high-pressure water jet, an engine for driving the delivery pump, and a fuel tank for storing and supplying gasoline. The delivery pump is equipped with a drain valve for discharging residual water from the pump chamber, and one end of the drain valve is connected to the lowest point of the pump chamber.

[0007] By adopting the above technical solution, the drainage valve can be used to remove most of the residual water by gravity, reducing the amount of residual water. After the cleaning operation, there is no need to manually disassemble the pipe to drain the water, which shortens the operation time.

[0008] Secondly, this application provides a control method for a gasoline-powered cleaning machine, employing the following technical solution: A control method for a gasoline-powered cleaning machine, applied to a gasoline-powered cleaning machine as described in the first aspect, includes: S10: In response to the drying signal, acquire information on the delivery pump, engine, and duct, and collect temperature and humidity parameters at the pump outlet. S11: Determine the residual water volume by combining the information of the delivery pump and temperature and humidity parameters; S12: Match the drying intensity according to the residual moisture content; S13: Determine the set speed and its corresponding drying air speed and effective heat by combining engine information and air duct information; S14: Based on the drying intensity, filter the drying air velocity and effective heat, and define the corresponding set speed as the execution speed; S15: When the effective heat is not less than the preset heat threshold, the required rotation speed is adjusted according to the heat threshold and drying intensity, and the adjustment parameters are determined according to the dissipation ratio and interval distance. S16: The drying command is obtained by integrating the corrected execution speed, the preset ventilation command and the adjustment parameters; S17: Execute the drying command to allow hot air from the engine to enter the pump chamber through a preset air duct.

[0009] By adopting the above technical solution, the drying intensity is matched according to the amount of residual water, and the heat generated by the engine is transported to the pump chamber for drying using the air duct, so as to thoroughly remove the residual water in the dead corners of the pump chamber.

[0010] Optional methods for determining effective heat include: S20: Determine the heat loss corresponding to the set speed based on engine information, and determine the heat dissipation ratio and duct size based on duct information; S21: Data acquisition interval distance; S22: Determine the absorption efficiency based on the spacing and duct size; S23: Determine the initial heat capacity by combining absorption efficiency and heat loss; S24: Determine the effective heat by using the initial heat and the proportion of heat dissipated.

[0011] By adopting the above technical solution, the effective heat is gradually derived from the heat dissipation of the engine, the proportion of heat dissipation from the air duct, and the absorption efficiency. The influence of the installation position between the air duct and the exhaust manifold on heat absorption is fully considered, which improves the accuracy of the calculation of effective heat.

[0012] Optionally, methods for correcting the required speed and determining the adjustment parameters include: S30: Use the heat threshold as the effective heat demand, and combine the drying intensity and the effective heat demand to determine the required drying air velocity; S31: Match the required drying air velocity with the required rotation speed and required heat loss; S32: Use the required speed as the corrected execution speed; S33: Determine the demand distance by combining the heat loss from demand, the proportion of heat loss, and the effective heat of demand; S34: Determine the adjustment parameters for the distance between the control duct and the engine based on the required distance and the interval distance.

[0013] By adopting the above technical solution, the effective heat is compared with the heat threshold. When the effective heat is not less than the heat threshold, the heat threshold is used as the required effective heat. The speed and interval distance are then adjusted to ensure that the airflow temperature entering the pump chamber is not too high, while ensuring that the drying intensity can be achieved.

[0014] Optionally, in response to the drying signal, the following may also be included: S40: In response to the start signal, determines the cooling parameters based on engine information; S41: Controls the operation of the preset cooling fan based on heat dissipation parameters and collects the ambient temperature; S42: When the ambient temperature is lower than the preset low temperature threshold, the preset high idle speed parameter and ventilation command are integrated to obtain the detection command; S43: Execute the detection command and continuously collect temperature and humidity parameters; S44: Determine the type of residue based on temperature and humidity parameters. The type of residue includes the presence of residual ice and the absence of residual ice. S450: Based on the presence of residual ice, continuously execute detection commands until the residual type is determined to be no residual ice; S451: Based on the absence of residual ice, stop executing the detection command and execute the preset cleaning command.

[0015] By adopting the above technical solution, before starting the equipment to perform cleaning operations, it is first determined whether there is residual ice in the pump chamber, and if there is residual ice, the high idle speed mode of the engine is used to remove the ice, reducing the probability of damage to the equipment caused by residual ice due to directly starting the delivery pump.

[0016] Optional methods for determining the type of residue include: S50: Acquire information about the delivery pump, engine, and ductwork; S51: Read the time point and its corresponding real-time temperature and humidity from the temperature and humidity parameters; S52: Determine the temperature rise rate based on real-time temperature and time point, and determine the humidity rise rate based on real-time humidity and time point; S53: Determine the effective heat at high idle speed by combining engine information, air duct information, and high idle speed parameters; S54: Determine the expected temperature rise based on high idle effective heat, ambient temperature, and delivery pump information; S550: When the humidity rise is greater than the preset baseline value and the temperature rise is less than the expected temperature rise value, the residual type is determined to be residual ice. S551: When the increase in humidity is not greater than the baseline value and the increase in temperature is not less than the expected temperature rise value, the residual type is determined to be no residual ice.

[0017] By adopting the above technical solution, the expected temperature rise is calculated using the effective heat at high idle speed, ambient temperature, and pump information. The humidity rise and temperature rise are compared to accurately determine the residual ice.

[0018] Optionally, the process of integrating the drying instructions includes: S60: When the ambient temperature is higher than the preset high temperature threshold, the absorption efficiency is adjusted according to the heat dissipation parameters, and the dissipation ratio is adjusted according to the ambient temperature. S61: The effective heat of verification is recalculated by combining the corrected absorption efficiency and the dissipation ratio; S62: Calculate and determine the verification wind speed based on the verification effective heat and drying intensity, and match the corresponding verification speed. S63: Determine the calibration interval by verifying the rotational speed and the effective heat output; S64: Integrate heat dissipation parameters into the drying command and combine the verification interval and verification speed to correct the drying command.

[0019] By adopting the above technical solution, the cooling fan is used to cool the engine in high-temperature environments. At the same time, the cooling fan increases the airflow speed into the air duct, and the position of the air duct and the rotation speed of the engine are adjusted accordingly to ensure that the pump chamber is dried while reducing energy consumption.

[0020] Optionally, the following steps are included before executing the cleaning command: S70: Responds to a dual-channel signal and determines the heating temperature based on the ambient temperature; S71: Determine the water flow rate and air flow rate based on the heat dissipation parameters, delivery pump information, and engine information; S72: Determine the required airflow temperature by combining water flow rate, air flow rate, and heating temperature; S73: Determine the movement parameters for controlling the distance between the air duct and the engine based on the required airflow temperature, duct information, and ambient temperature; S74: Corrects cleaning commands by moving parameters and preset dual-pass commands.

[0021] By adopting the above technical solution, in low-temperature environments, a three-way valve is used to simultaneously introduce water and air into the pump chamber, and the heat dissipated by the engine is used to heat the water flow, thereby increasing the temperature of the jet sprayed from the high-pressure spray gun and enhancing the cleaning effect.

[0022] Optionally, after determining the movement parameters, the following may be included: S80: Determine the effective distance range based on duct information and engine information; S81: When the movement parameter is greater than the upper limit of the effective distance interval, the upper limit of the effective distance interval is defined as the actual movement parameter; S82: Determine the actual airflow temperature by back-calculating based on actual movement parameters, duct information, and ambient temperature; S83: Determine the basic airflow and basic waterflow based on the delivery pump information and engine information; S84: Adjusts heat dissipation parameters based on actual airflow temperature, basic airflow, and basic waterflow. S85: Corrects cleaning commands using revised heat dissipation parameters.

[0023] By adopting the above technical solution, when the distance between the air duct and the exhaust manifold exceeds the receiving distance of the air duct, the position of the air duct is locked at the maximum value of the effective distance range, and the heat dissipation parameters are corrected to ensure that the drying intensity in the pump chamber meets the standard.

[0024] Optionally, methods for correcting heat dissipation parameters include: S90: Determine the supplementary heat based on the basic water flow rate and the temperature rise; S91: Determine the supplemental ventilation rate by combining the supplemental heat and the actual airflow temperature; S92: Determine the ventilation difference by supplemental ventilation and basal ventilation; S93: Corrected heat dissipation parameters are obtained based on ventilation difference matching.

[0025] By adopting the above technical solution, the heat demand of water flow can be accurately quantified by supplementing the heat calculation. The required airflow flux is calculated by combining the actual airflow temperature. The difference is calculated by combining the basic airflow and matching the corresponding heat dissipation parameters for correction.

[0026] In summary, the present invention has at least one of the following beneficial technical effects: By using the drain valve, most of the residual water can be removed by gravity, reducing the amount of residual water. After cleaning, there is no need to manually disassemble the pipe to drain the water, which shortens the operation time. The drying intensity is matched according to the amount of residual water. The heat generated by the engine is transferred to the pump chamber for drying by using the air duct. The residual water in the dead corners of the pump chamber is thoroughly removed. The effective heat is compared with the heat threshold. When the effective heat is not less than the heat threshold, the heat threshold is used as the required effective heat. The speed and interval distance are then adjusted to ensure that the airflow temperature entering the pump chamber is not too high, while ensuring that the drying intensity can be achieved. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a gasoline-powered cleaning machine according to this application; Figure 2 This is a simplified structural diagram of the delivery pump of a gasoline-powered cleaning machine according to this application.

[0028] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Mounting bracket; 2. Delivery pump; 21. Pump chamber; 22. Drain valve; 23. Inlet; 24. Outlet; 3. Engine; 4. Oil tank; 5. Clutch; 6. Reducer. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] This invention discloses a gasoline-powered cleaning machine.

[0031] Reference Figure 1 and Figure 2 A gasoline-powered cleaning machine includes a mounting frame 1, a delivery pump 2, an engine 3, and a fuel tank 4. The engine 3 is fixedly mounted on the mounting frame 1 by bolts, and the fuel tank 4 and the delivery pump 2 are fixedly mounted on the engine 3.

[0032] The delivery pump 2 is used to convert atmospheric pressure water into high pressure water jet. The delivery pump 2 has a pump chamber 21. A drain valve 22 is installed at the lower end of the delivery pump 2 to discharge residual water in the pump chamber 21. The drain valve 22 is connected to the lowest point of the pump chamber 21. The two ends of the delivery pump 2 are respectively provided with an inlet 23 and an outlet 24, both of which are connected to the pump chamber 21. The inlet 23 is connected to an external water supply device, and the outlet 24 is connected to an external high pressure spray gun. The delivery pump 2 can be a plunger pump or a diaphragm pump, etc.

[0033] The engine 3 is connected to the fuel tank 4. The engine 3 is used to drive the delivery pump 2, and the fuel tank 4 is used to store gasoline and supply gasoline to the engine 3 when the engine 3 is running.

[0034] A clutch 5 and a reducer 6 are sequentially arranged between the engine 3 and the delivery pump 2. The input end of the clutch 5 is connected to the output end of the engine 3, the output end of the clutch 5 is connected to the input end of the reducer 6, and the output end of the reducer 6 is connected to the delivery pump 2.

[0035] Gasoline is injected into fuel tank 4, and engine 3 is started. Engine 3 drives delivery pump 2 through clutch 5 and reducer 6. Delivery pump 2 delivers atmospheric pressure water from water supply equipment through inlet 23 to pump chamber 21. The atmospheric pressure water is pressurized into high pressure water in pump chamber 21 and sprayed out from high pressure spray gun through outlet 24 to form a high pressure jet for cleaning. After cleaning, drain valve 22 is opened to drain the residual water in pump chamber 21, reducing the damage caused by residual water freezing in low temperature environment. At the same time, there is no need to manually disassemble the pipeline, reducing the manual operation steps after startup and shortening the operation time.

[0036] Based on the same inventive concept, embodiments of the present invention provide a control method for a gasoline-powered cleaning machine.

[0037] A control method for a gasoline-powered cleaning machine includes the following steps: S10: In response to the drying signal, acquire information on the delivery pump, engine, and duct, and collect temperature and humidity parameters at the outlet of pump chamber 21.

[0038] The drying signal refers to the instruction signal to start the drying process in pump chamber 21; after the equipment completes the cleaning operation, the operator issues the drying instruction through the control panel to obtain the drying signal.

[0039] The transfer pump information refers to the core technical parameters and operating data set related to transfer pump 2, including parameters such as pump chamber volume and rated working pressure; these parameters are obtained in advance by the staff according to the model of transfer pump 2 and entered into the system, and the transfer pump information is directly read when in use.

[0040] Engine information refers to the performance parameters and operating status data related to engine 3; it is obtained and entered into the system in advance by staff according to the model of engine 3, and the engine information is directly read when in use.

[0041] Duct information refers to the relevant technical parameters of the pipes pre-set on one side of engine 3, including duct material, thermal conductivity, and duct size. The relevant parameters of the duct are measured and integrated into duct information, which is pre-entered into the system by staff and can be directly read when in use.

[0042] The air duct is a flexible hose fixedly installed on one side of the engine 3. One end of the air duct faces the exhaust manifold of the engine 3, and the distance between the air duct and the exhaust manifold can be controlled and adjusted by an external drive device. The other end of the air duct is connected to the water inlet 23 through a three-way valve. The three ends of the three-way valve are respectively connected to the water inlet 23, the air duct, and the external water supply equipment.

[0043] Temperature and humidity parameters refer to the temperature and humidity data that reflect the internal environment of the pump chamber 21; these parameters are obtained in real time by a temperature and humidity sensor installed at the outlet of the pump chamber 21.

[0044] S11: Determine the residual water volume by combining the information from the delivery pump and temperature and humidity parameters.

[0045] Residual water volume refers to the total mass of water that remains inside the pump chamber 21 after the equipment is shut down and is not completely drained. Based on the pump chamber volume and material water absorption rate in the pump information, a calculation model is established in combination with humidity data. The specific value of residual water in the pump chamber 21, i.e., residual water volume, is deduced by using the correlation curve between humidity data and residual water volume established through offline calibration experiments.

[0046] S12: Match the drying intensity according to the residual moisture content.

[0047] Drying intensity refers to the core drying index that needs to be achieved to completely remove residual water within a preset drying time. The corresponding drying intensity is found by looking up the amount of residual water in the drying correspondence table. The drying correspondence table is a data table that records different amounts of residual water and their corresponding drying intensities, which is obtained by technicians through pre-testing and recording.

[0048] The drying time refers to the total time required to remove residual water from the pump chamber 21 using the waste heat hot air from the engine 3. This time is preset by the staff and entered into the system.

[0049] S13: Combine engine information and duct information to determine the set speed and its corresponding drying air speed and effective heat.

[0050] The set speed refers to the target operating speed range of engine 3, which includes multiple continuous or discrete speed values. Each individual speed data in the set speed range corresponds to the drying air speed and the effective heat. Based on the heat dissipation curve of engine 3 and the duct conduction efficiency model, the effective speed range of engine 3 is defined, and several specific speed data are extracted and integrated to obtain the set speed.

[0051] The drying air velocity refers to the average air velocity when the engine 3 drives the delivery pump 2 to transfer the airflow in the duct to the pump chamber 21 at a set speed. The theoretical air velocity is calculated using fluid dynamics formulas based on parameters such as the set speed, duct inner diameter, and length. The theoretical air velocity is then corrected based on the duct bending angle and the number of bends to obtain the drying air velocity. The data such as the duct inner diameter, length, duct bending angle, and number of bends are all obtained from the engine information and duct information.

[0052] Effective heat refers to the amount of heat that can actually be applied to the pump chamber 21 after being transmitted through the air duct from the exhaust manifold of engine 3; the specific determination method will be disclosed in detail in subsequent steps, and will not be repeated here.

[0053] S14: Based on the drying intensity, filter the drying air velocity and effective heat, and define the corresponding set speed as the execution speed.

[0054] The operating speed refers to the engine speed of engine 3 corresponding to the drying wind speed and effective heat that match the drying intensity. The corresponding set intensity is calculated by combining the drying wind speed and effective heat corresponding to the same set speed with the preset heat coefficient. The set intensity that matches the drying intensity is selected, and the set speed corresponding to the set intensity is defined as the operating speed. The heat coefficient is the correction amount when calculating the set intensity by combining the drying wind speed and effective heat. It is obtained in advance by the staff and entered into the system.

[0055] S15: When the effective heat is not less than the preset heat threshold, adjust the required rotation speed according to the heat threshold and drying intensity, and determine the adjustment parameters according to the dissipation ratio and interval distance.

[0056] The method for correcting the required rotational speed will be disclosed in detail in subsequent steps, and will not be repeated here.

[0057] The heat threshold is the maximum upper limit used to restrict the effective heat during the drying process, so as to avoid structural damage such as aging of the pump cavity material and damage to the seals caused by high temperature. The heat threshold is set according to the temperature resistance limit of the pump cavity material and the temperature tolerance of the seals, and is obtained and entered into the system in advance by the staff.

[0058] The adjustment parameters refer to the specific parameters used to control the adjustment of the distance between the duct and the exhaust manifold, including the adjustment direction and adjustment distance; the method for determining the adjustment parameters will be disclosed in detail in subsequent steps, and will not be repeated here.

[0059] S16: The drying command is obtained by integrating the corrected execution speed, preset ventilation command and adjustment parameters.

[0060] The ventilation command is an execution command that controls the three-way valve at the end of the duct to connect the duct to the pump chamber 21. The operator sets and enters the command into the system in advance according to the model of the three-way valve, and the ventilation command is obtained directly when in use.

[0061] The drying command refers to the comprehensive control command used to control the coordinated operation of engine 3 and air duct; the drying command is obtained by integrating the control of the engine 3's execution speed with the ventilation command to control the state of the three-way valve.

[0062] S17: Execute the drying command to allow hot air from engine 3 to enter pump chamber 21 through a preset air duct.

[0063] When the drying command is executed, the engine 3 controls the operation of the delivery pump 2, which drives the hot air from the exhaust manifold of the engine 3 into the pump chamber 21 to dry the residual water in the pump chamber 21. At the same time, the adjustment parameters are executed to control the distance between the air duct and the exhaust manifold, thereby ensuring that the drying intensity in the pump chamber 21 remains constant.

[0064] The method for determining effective heat includes the following steps: S20: Determine the heat loss corresponding to the set speed based on engine information, and determine the heat dissipation ratio and duct size based on duct information.

[0065] Heat loss refers to the total heat dissipated by engine 3 to the outside through the exhaust manifold at a set speed. The corresponding heat loss is retrieved from the heat loss correspondence table according to the set speed. The heat loss correspondence table is a data table that records different set speeds and their corresponding heat loss. The heat loss correspondence table corresponds one-to-one with the engine information and is obtained by technicians through prior testing and recording.

[0066] The heat loss ratio refers to the proportion of heat lost due to heat dissipation and other reasons during the heat transfer process through the duct. The heat loss ratio is calculated using the heat conduction formula based on parameters such as the thermal conductivity of the material, the thickness of the insulation layer, and the length of the duct.

[0067] Duct size refers to the core parameters of the physical specifications of the duct, mainly including the inner diameter of the end of the duct near the exhaust manifold; it is measured in advance by staff and integrated into the duct information, and can be directly read when in use.

[0068] S21: Data collection interval distance.

[0069] The interval distance refers to the actual straight-line distance between the end of the air duct and the exhaust manifold of engine 3; the interval distance is obtained in real time by a distance sensor installed on the air duct.

[0070] S22: Determine the absorption efficiency based on the spacing and duct size.

[0071] Absorption efficiency refers to the ability of the duct to absorb heat emitted from the exhaust manifold, that is, the proportion of heat actually absorbed by the duct to the heat lost by the engine. A correlation model is established based on the interval distance and the duct size. The smaller the interval distance and the larger the inner diameter of the duct, the higher the absorption efficiency. The absorption efficiency is obtained by querying the actual interval distance and the duct size.

[0072] S23: Determine the initial heat by combining absorption efficiency and heat loss.

[0073] Initial heat refers to the total amount of heat entering the duct from the exhaust manifold; the initial heat is calculated by multiplying the absorption efficiency by the heat loss.

[0074] S24: Determine the effective heat by using the initial heat and the proportion of heat dissipated.

[0075] The effective heat is calculated by multiplying the initial heat by the dissipation ratio.

[0076] The method for adjusting the required speed and determining the adjustment parameters includes the following steps: S30: Use the heat threshold as the required effective heat, and combine the drying intensity and the required effective heat to determine the required drying air velocity.

[0077] The effective heat demand refers to the actual effective heat value determined when the effective heat exceeds the heat threshold; the heat threshold is directly used as the effective heat demand.

[0078] The required drying air velocity refers to the airflow velocity required to match the drying intensity under the premise of required effective heat. In other words, the drying intensity can only be met by blowing out an airflow with the required effective heat at the required drying air velocity. Similar to the method of calculating the set intensity during the process of obtaining the execution speed, the corresponding required drying air velocity is calculated based on the drying intensity and the required effective heat.

[0079] S31: Based on the required drying air speed, match the required rotation speed and required heat dissipation.

[0080] The required rotational speed refers to the rotational speed of engine 3 when it is running and the air speed entering pump chamber 21 reaches the required drying air speed. Similar to the method of obtaining the drying air speed, the corresponding set rotational speed, i.e., the required rotational speed, is obtained by using fluid dynamics formulas in combination with the required drying air speed.

[0081] The heat loss due to demand refers to the heat lost from the exhaust manifold of engine 3 when engine 3 is running and the air speed entering pump chamber 21 reaches the required drying air speed. Similar to the method for obtaining heat loss, the heat loss due to demand is calculated using the required rotational speed.

[0082] S32: Use the required speed as the corrected execution speed.

[0083] The required speed is directly used as the corrected execution speed to control the operation of engine 3.

[0084] S33: Determine the demand distance by combining the heat loss from demand, the proportion of heat loss, and the effective heat of demand.

[0085] The demand distance refers to the distance between the duct and the exhaust manifold set so that the heat loss at the exhaust manifold can reach the effective heat demand when it is transferred to the pump chamber 21 through the duct. The corresponding initial heat is calculated based on the effective heat demand and the dissipation ratio. The corresponding absorption efficiency is calculated by dividing the initial heat by the heat loss demand. The demand distance is then calculated by combining the absorption efficiency with the known duct size and using the correlation model.

[0086] S34: Determine the adjustment parameters for the distance between the control duct and engine 3 based on the required distance and interval distance.

[0087] The adjustment direction here is always towards the direction of the duct closer to the exhaust manifold. This is preset by the staff. The adjustment distance is calculated by taking the absolute difference between the required distance and the interval distance. The adjustment direction and adjustment distance are then integrated to obtain the adjustment parameters.

[0088] The following steps are included before responding to the drying signal: S40: In response to the start signal, determines the cooling parameters based on engine information.

[0089] The start signal is the instruction signal that triggers the gasoline-powered cleaning machine to start running; it is generated when the operator actively presses the start button.

[0090] The heat dissipation parameters refer to the execution parameters of the cooling fan that is preset on the outside of the engine 3 and linked with the engine 3. The heat dissipation parameters are obtained by pre-setting the base value based on the rated power and heat dissipation system design parameters in the engine information, combined with the real-time operating temperature and load dynamic correction of the engine 3. By default, the heat dissipation parameters correspond one-to-one with the engine information, and the heat dissipation parameters can also be actively adjusted.

[0091] The cooling fan is a special fan component that is pre-installed on the outside of the engine 3 to cool the engine 3. During operation, it can quickly dissipate the heat from the surface of the engine 3 and introduce some airflow into the air duct.

[0092] S41: Controls the operation of the preset cooling fan based on heat dissipation parameters and collects the ambient temperature.

[0093] Ambient temperature refers to the ambient temperature under control in the operating environment of the equipment, which is obtained in real time by a temperature sensor installed on the outside of the equipment.

[0094] S42: When the ambient temperature is lower than the preset low temperature threshold, the preset high idle speed parameter and ventilation command are integrated to obtain the detection command.

[0095] The low temperature threshold is the critical temperature value used to determine whether the environment may cause the residual water in the pump chamber 21 to freeze. Based on the freezing point of water and combined with the extreme temperature range of the equipment's working environment, the low temperature threshold is preset, usually from -5℃ to 0℃. It is preset by the staff and entered into the system, and the low temperature threshold is directly read when in use.

[0096] High idle speed parameters refer to the core control parameters when engine 3 executes high idle speed operation mode, including high idle speed, etc. The corresponding high idle speed parameters are preset according to the engine model. When the engine model is obtained, the corresponding parameters are automatically matched and entered into the system. When in use, the high idle speed parameters can be directly read.

[0097] The detection command refers to the control command used to detect the residual ice state in the pump chamber 21 under low temperature environment; the detection command is generated by integrating high idle speed parameters and ventilation command.

[0098] When the detection command is executed, engine 3 operates in high idle speed mode, and the three-way valve is adjusted to connect the air duct and the pump chamber 21, so that heat is quickly generated at the exhaust manifold. At this time, the cooling fan introduces the heat into the pump chamber 21 through the air duct to realize the detection of residual ice. At this time, engine 3 does not drive the delivery pump 2 to run, reducing the possibility of equipment damage caused by residual ice in the delivery pump 2.

[0099] S43: Execute the detection command and continuously collect temperature and humidity parameters.

[0100] While executing the detection command, temperature and humidity parameters are collected by the temperature and humidity sensor at the outlet of pump chamber 21.

[0101] S44: Determine the type of residue based on temperature and humidity parameters. The type of residue includes the presence of residual ice and the absence of residual ice.

[0102] The residual type refers to the different types of residual ice inside the pump chamber 21, determined based on temperature and humidity parameters. These include two types: those with residual ice and those without residual ice. The specific determination method will be disclosed in detail in subsequent steps and will not be elaborated here.

[0103] S450: Based on the presence of residual ice, continuously execute detection commands until the residual type is determined to be no residual ice.

[0104] If there is residual ice, that is, if there is residual ice in the pump chamber 21, the detection command continues to be executed to continuously transfer hot air to the pump chamber 21 to complete the ice melting operation until there is no residual ice in the pump chamber 21.

[0105] S451: Based on the absence of residual ice, stop executing the detection command and execute the preset cleaning command.

[0106] The cleaning command refers to the comprehensive command that controls the gasoline-powered cleaning machine to perform cleaning operations, including parameters such as the operation of the delivery pump 2, water pressure, and cleaning duration. The corresponding cleaning command is generated according to the cleaning mode. The correspondence between the cleaning mode and the cleaning command is preset by the staff and entered into the system. The cleaning command is directly read when the machine is in use.

[0107] The method for determining the type of residue includes the following steps: S50: Obtain information on the delivery pump, engine, and ductwork.

[0108] The acquisition method is the same as in S10, acquiring information about the delivery pump, engine, and ductwork respectively.

[0109] S51: Read the time point and its corresponding real-time temperature and humidity from the temperature and humidity parameters.

[0110] A time node refers to the specific moment when temperature and humidity parameters are collected, which is used to calculate the range of temperature and humidity changes. Several time nodes are recorded by the clock module of the equipment control system, which are synchronized with the temperature and humidity parameter collection to form a corresponding data set of "time-temperature-humidity".

[0111] Real-time temperature refers to the instantaneous temperature value collected at each time point. The real-time temperature is collected in real time by the temperature and humidity sensor at the outlet of pump chamber 21. The real-time temperature is stored synchronously with the time point to form temperature time series data.

[0112] Real-time humidity refers to the instantaneous humidity value collected at each time point. Real-time humidity is acquired in real time by a temperature and humidity sensor at the outlet of pump chamber 21, and the real-time humidity is stored synchronously with the time points to form humidity time-series data. S52: Determine the temperature rise rate based on real-time temperature and time point, and determine the humidity rise rate based on real-time humidity and time point.

[0113] The temperature rise amplitude refers to the real-time temperature difference between two adjacent time points; the temperature rise amplitude is obtained by differential calculation of the collected temperature time series data.

[0114] The humidity increase magnitude refers to the real-time humidity difference between two adjacent time points; the humidity increase magnitude is obtained by differential calculation of the collected humidity time series data.

[0115] S53: Determine the effective heat at high idle speed by combining engine information, air duct information, and high idle speed parameters.

[0116] High idle effective heat refers to the actual effective heat value transferred from engine 3 to pump chamber 21 through air duct when engine 3 is in high idle operating mode; similar to the method of obtaining effective heat, the speed in high idle parameters is replaced with the execution speed to obtain high idle effective heat.

[0117] S54: Determine the expected temperature rise based on high idle effective heat, ambient temperature, and delivery pump information.

[0118] The expected temperature rise refers to the theoretical temperature rise under ideal conditions with no residual ice. A thermodynamic model is established, and parameters such as high idle effective heat, pump chamber volume, air specific heat capacity, and ambient temperature are input to calculate the theoretical temperature rise in pump chamber 21 per unit time, which is the expected temperature rise.

[0119] S550: When the humidity rise is greater than the preset baseline value and the temperature rise is less than the expected temperature rise value, the residual type is determined to be residual ice.

[0120] The baseline amplitude is the threshold value for determining whether humidity has increased; it is preset and entered into the system by staff, and in this embodiment it is set to 0.

[0121] If the increase in humidity is greater than the baseline value and the increase in temperature is less than the expected increase in temperature, it means that there is residual ice inside the pump chamber 21. The melting process of the ice absorbs a lot of heat, causing the humidity to rise due to the melting of the ice, while the temperature cannot reach the theoretical increase due to the absorption of heat.

[0122] S551: When the increase in humidity is not greater than the baseline value and the increase in temperature is not less than the expected temperature rise value, the residual type is determined to be no residual ice.

[0123] If the increase in humidity is not greater than the baseline value and the increase in temperature is not less than the expected temperature rise, it means that there is no residual ice inside the pump chamber 21. The effective heat at high idle speed is mainly used to increase the air temperature in the pump chamber 21. Therefore, the temperature rise reaches the theoretical value, while the humidity does not rise significantly.

[0124] The steps before receiving the drying instruction include: S60: When the ambient temperature is higher than the preset high temperature threshold, the absorption efficiency is adjusted according to the heat dissipation parameters, and the dissipation ratio is adjusted according to the ambient temperature.

[0125] The high temperature threshold is the critical temperature value for judging that the ambient temperature is too high. The high temperature threshold is set based on the upper limit of the ambient temperature for normal operation of engine 3 and the limit of the heat dissipation efficiency of the air duct. It is obtained in advance by the staff and entered into the system.

[0126] If the ambient temperature is higher than the high temperature threshold, it means that the working environment temperature of the cleaning machine is too high, which will cause the cooling efficiency of engine 3 to decrease. It is necessary to start the cooling fan to improve the cooling efficiency. The cooling fan delivers more airflow to the air duct, so the corresponding parameters and instructions need to be adjusted.

[0127] The corresponding efficiency correction coefficient is retrieved from the correction correspondence table based on the heat dissipation parameters, and the corresponding dissipation correction coefficient is retrieved from the correction correspondence table based on the ambient temperature. The correction correspondence table is a data table that records different heat dissipation parameters and their corresponding efficiency correction coefficients and dissipation correction coefficients. It is obtained by technicians through prior testing. The corrected absorption efficiency is calculated by multiplying the efficiency correction coefficient with the absorption efficiency, and the corrected dissipation ratio is calculated by multiplying the dissipation correction coefficient with the dissipation ratio.

[0128] S61: The effective heat of verification is recalculated by combining the corrected absorption efficiency and the dissipation ratio.

[0129] Verification of effective heat refers to the effective heat value obtained by recalculating after correcting the absorption efficiency and dissipation ratio under high temperature conditions. Similar to the calculation method of effective heat, the original absorption efficiency and dissipation ratio are replaced by the corrected absorption efficiency and dissipation ratio to recalculate the effective heat. This effective heat is the verification effective heat.

[0130] S62: Calculate and determine the verification wind speed based on the effective heat and drying intensity, and match the corresponding verification speed.

[0131] The calibration wind speed refers to the airflow speed used to match the drying requirements under high temperature conditions, ensuring that the drying intensity can always be achieved in the pump chamber 21. Similar to the method of obtaining the execution speed, the calibration wind speed is calculated based on the drying intensity, calibration wind speed, and heat coefficient.

[0132] The calibration speed refers to the speed at which the engine 3 is controlled to achieve the calibration wind speed in order to make the wind speed entering the pump chamber 21 reach the calibration wind speed. Since the individual speed data in the set speed corresponds one-to-one with the drying wind speed and the effective heat, the corresponding calibration speed is obtained directly by matching the calibration wind speed.

[0133] S63: Determine the calibration interval by calibrating the rotational speed and the effective heat output.

[0134] The calibration interval refers to the distance between the air duct and the exhaust manifold required for the engine 3 to achieve the calibration effective heat when the actual effective heat is generated based on the calibration speed. Similar to the method of obtaining effective heat, the calibration interval is obtained by matching the corresponding heat loss based on the calibration speed and combining it with the calibration effective heat.

[0135] S64: Integrate heat dissipation parameters into the drying command and combine the verification interval and verification speed to correct the drying command.

[0136] The heat dissipation parameters are integrated into the drying command, and the corresponding parameters in the drying command are corrected by combining the verification interval and verification speed.

[0137] The following steps are included before executing the cleaning command: S70: In response to a dual-channel signal, the heating temperature is determined based on the ambient temperature.

[0138] Since the ambient temperature is below the low temperature threshold, to ensure the cleaning effect, the three-way valve can be fully opened to allow hot air to enter the water and raise the water temperature.

[0139] A dual-pass signal is a command signal that triggers the gasoline-powered cleaning machine to simultaneously activate both water and air delivery; the dual-pass signal is obtained by the operator issuing the dual-pass command through the control panel.

[0140] The heating temperature refers to the target difference in the temperature of the water flow that needs to be increased to meet the cleaning effect. The heating temperature is calculated by the difference between the preset target temperature and the ambient temperature. The target temperature is preset by the staff and entered into the system. In this embodiment, it is set to 10℃.

[0141] S71: Determine the water flow rate and air flow rate based on the heat dissipation parameters, delivery pump information, and engine information.

[0142] The water flow rate refers to the flow rate of water entering the pump chamber 21 per unit time during the cleaning process; the basic water flow rate is determined based on the information of the delivery pump and the engine.

[0143] Ventilation flow rate refers to the flow rate of air entering the pump chamber 21 per unit time during the cleaning process. The basic ventilation volume is determined based on the information of the delivery pump and the engine. The ventilation flow rate is obtained by correcting the basic ventilation volume in combination with the effect of heat dissipation parameters on the airflow in the duct.

[0144] S72: Determine the required airflow temperature by combining water flow rate, air flow rate, and heating temperature.

[0145] The required airflow temperature refers to the temperature of the airflow introduced to raise the water flow temperature by the corresponding temperature. The required heat value per unit time is calculated by multiplying the water flow rate, the known water density, the known specific heat capacity of water, and the temperature rise. The required airflow temperature is obtained by quotienting the required heat value with the air flow rate, the known air density, and the known specific heat capacity of air.

[0146] S73: Determine the movement parameters for controlling the distance between the air duct and engine 3 based on the required airflow temperature, duct information, and ambient temperature.

[0147] The movement parameter refers to the distance between the duct and the exhaust manifold when the airflow temperature reaches the required airflow temperature. Similar to the method of obtaining the calibration interval, the movement interval is determined based on the required airflow temperature, duct information and ambient temperature. The movement parameter is obtained by taking the absolute difference between the movement interval and the current interval distance.

[0148] S74: Corrects cleaning commands by moving parameters and preset dual-pass commands.

[0149] The double-pass command refers to the execution command that fully opens the three-way valve so that both the air duct and the water supply equipment are connected to the pump chamber 21; the operator sets and enters the command into the system in advance according to the model of the three-way valve, and directly reads the command when in use.

[0150] The duct is equipped with a one-way valve to prevent water from entering the duct.

[0151] After determining the movement parameters, the following steps are included: S80: Determine the effective distance range based on duct information and engine information.

[0152] The effective distance range refers to the distance range that ensures efficient heat transfer without damaging the equipment. The effective distance range is set based on the high temperature range of the exhaust manifold, the heat resistance limit of the duct material, and the test data of the heat transfer efficiency. It is preset by the staff and entered into the system. When in use, the effective distance range is directly read.

[0153] S81: When the movement parameter is greater than the upper limit of the effective distance interval, the upper limit of the effective distance interval is defined as the actual movement parameter.

[0154] If the movement parameter is greater than the upper limit of the effective distance range, it means that the distance between the duct and the exhaust manifold is too far, and heat transfer cannot be achieved, so adjustment is required.

[0155] The actual movement parameter refers to the distance parameter between the duct and the exhaust manifold that is finally determined after being constrained by the effective distance range; the upper limit of the effective distance range is directly used as the actual movement parameter.

[0156] S82: Determine the actual airflow temperature by back-calculating based on actual movement parameters, duct information, and ambient temperature.

[0157] The actual airflow temperature refers to the actual temperature of the hot air transmitted from the duct to the pump chamber 21 after adjustment according to the actual movement parameters. Similar to the method of obtaining effective heat, the actual airflow temperature is determined by back-calculation based on the actual movement parameters, duct information and ambient temperature.

[0158] S83: Determine the basic airflow and basic waterflow based on the delivery pump information and engine information.

[0159] The basic ventilation volume refers to the default ventilation flow rate under standard operating conditions with the three-way valve fully open. A three-dimensional data model is established based on the delivery pump information and engine information to run the engine at the specified speed 3 to obtain the basic ventilation volume entering the pump chamber 21.

[0160] The basic flow rate refers to the default flow rate when the three-way valve is fully open under standard operating conditions; the engine 3 is run at the specified speed to obtain the basic flow rate into the pump chamber 21.

[0161] S84: Adjusts heat dissipation parameters by combining the heating temperature, actual airflow temperature, basic airflow, and basic waterflow.

[0162] The heat dissipation parameters are corrected by combining the heating temperature, actual airflow temperature, basic ventilation volume, and basic water flow volume. The specific correction method will be disclosed in detail in subsequent steps and will not be repeated here.

[0163] S85: Corrects cleaning commands using revised heat dissipation parameters.

[0164] The cleaning command was modified using the revised heat dissipation parameters.

[0165] The method for correcting heat dissipation parameters includes the following steps: S90: Determine the supplementary heat based on the basic water flow rate and the temperature rise.

[0166] Supplemental heat refers to the amount of heat required to raise the temperature of the water flow when the basic flow rate is used. The supplemental heat is calculated by multiplying the basic flow rate, the temperature rise, and the known specific heat capacity of the water.

[0167] S91: Determine the supplemental ventilation rate by combining the supplemental heat and the actual airflow temperature.

[0168] Supplemental ventilation refers to the amount of air introduced into the water at the actual airflow temperature to raise the water flow temperature. The supplemental ventilation is calculated by successively quotienting the supplemental heat with the actual airflow temperature and the specific heat capacity of the air.

[0169] S92: Determine the ventilation difference by supplemental ventilation and baseline ventilation.

[0170] Ventilation difference refers to the difference between the airflow driven by delivery pump 2 and the supplemental ventilation volume; the ventilation difference is calculated by subtracting the supplemental ventilation volume from the baseline ventilation volume.

[0171] S93: Corrected heat dissipation parameters are obtained based on ventilation difference matching.

[0172] The corresponding heat dissipation parameters are retrieved from the heat dissipation correspondence table based on the ventilation difference value. The heat dissipation correspondence table is a data table that records different ventilation differences and their corresponding heat dissipation parameters. It is obtained by technicians through pre-testing and recording. The matched heat dissipation parameters are used as the new heat dissipation parameters for correction.

[0173] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A gasoline-powered cleaning machine, characterized in that, It includes a delivery pump (2) having a pump chamber (21) for converting atmospheric water into a high-pressure water jet, an engine (3) for driving the delivery pump (2) and a fuel tank (4) for storing and supplying gasoline. The delivery pump (2) is equipped with a drain valve (22) for discharging residual water in the pump chamber (21), and one end of the drain valve (22) is connected to the lowest point of the pump chamber (21).

2. A control method for a gasoline-powered cleaning machine, applied to the gasoline-powered cleaning machine as described in claim 1, characterized in that, include: S10: In response to the drying signal, acquire information on the delivery pump, engine and duct, and collect temperature and humidity parameters at the outlet of the pump chamber (21); S11: Determine the residual water volume by combining the information of the delivery pump and temperature and humidity parameters; S12: Match the drying intensity according to the residual moisture content; S13: Determine the set speed and its corresponding drying air speed and effective heat by combining engine information and air duct information; S14: Based on the drying intensity, filter the drying air velocity and effective heat, and define the corresponding set speed as the execution speed; S15: When the effective heat is not less than the preset heat threshold, the required rotation speed is adjusted according to the heat threshold and drying intensity, and the adjustment parameters are determined according to the dissipation ratio and interval distance. S16: The drying command is obtained by integrating the corrected execution speed, the preset ventilation command and the adjustment parameters; S17: Execute the drying command to allow the hot air at the engine (3) to enter the pump chamber (21) through the preset air duct.

3. The control method for a gasoline-powered cleaning machine according to claim 2, characterized in that, Methods for determining effective heat include: S20: Determine the heat loss corresponding to the set speed based on engine information, and determine the heat dissipation ratio and duct size based on duct information; S21: Data acquisition interval distance; S22: Determine the absorption efficiency based on the spacing and duct size; S23: Determine the initial heat capacity by combining absorption efficiency and heat loss; S24: Determine the effective heat by using the initial heat and the proportion of heat dissipated.

4. The control method for a gasoline-powered cleaning machine according to claim 3, characterized in that, Methods for adjusting the required speed and determining the adjustment parameters include: S30: Use the heat threshold as the effective heat demand, and combine the drying intensity and the effective heat demand to determine the required drying air velocity; S31: Match the required drying air velocity with the required rotation speed and required heat loss; S32: Use the required speed as the corrected execution speed; S33: Determine the demand distance by combining the heat loss from demand, the proportion of heat loss, and the effective heat of demand; S34: Determine the adjustment parameters for the distance between the control duct and the engine (3) based on the required distance and the interval distance.

5. The control method for a gasoline-powered cleaning machine according to claim 4, characterized in that, The response to the drying signal also includes: S40: In response to the start signal, determines the cooling parameters based on engine information; S41: Controls the operation of the preset cooling fan based on heat dissipation parameters and collects the ambient temperature; S42: When the ambient temperature is lower than the preset low temperature threshold, the preset high idle speed parameter and ventilation command are integrated to obtain the detection command; S43: Execute the detection command and continuously collect temperature and humidity parameters; S44: Determine the type of residue based on temperature and humidity parameters. The type of residue includes the presence of residual ice and the absence of residual ice. S450: Based on the presence of residual ice, continuously execute detection commands until the residual type is determined to be no residual ice; S451: Based on the absence of residual ice, stop executing the detection command and execute the preset cleaning command.

6. The control method for a gasoline-powered cleaning machine according to claim 5, characterized in that, Methods for determining the type of residue include: S50: Acquire information about the delivery pump, engine, and ductwork; S51: Read the time point and its corresponding real-time temperature and humidity from the temperature and humidity parameters; S52: Determine the temperature rise rate based on real-time temperature and time point, and determine the humidity rise rate based on real-time humidity and time point; S53: Determine the effective heat at high idle speed by combining engine information, air duct information, and high idle speed parameters; S54: Determine the expected temperature rise based on high idle effective heat, ambient temperature, and delivery pump information; S550: When the humidity rise is greater than the preset baseline value and the temperature rise is less than the expected temperature rise value, the residual type is determined to be residual ice. S551: When the increase in humidity is not greater than the baseline value and the increase in temperature is not less than the expected temperature rise value, the residual type is determined to be no residual ice.

7. The control method for a gasoline-powered cleaning machine according to claim 5, characterized in that, Before receiving the drying instruction, the integration process includes: S60: When the ambient temperature is higher than the preset high temperature threshold, the absorption efficiency is adjusted according to the heat dissipation parameters, and the dissipation ratio is adjusted according to the ambient temperature. S61: The effective heat of verification is recalculated by combining the corrected absorption efficiency and the dissipation ratio; S62: Calculate and determine the verification wind speed based on the verification effective heat and drying intensity, and match the corresponding verification speed. S63: Determine the calibration interval by verifying the rotational speed and the effective heat output; S64: Integrate heat dissipation parameters into the drying command and combine the verification interval and verification speed to correct the drying command.

8. The control method for a gasoline-powered cleaning machine according to claim 5, characterized in that, Before executing the cleaning command, the following should be included: S70: Responds to a dual-channel signal and determines the heating temperature based on the ambient temperature; S71: Determine the water flow rate and air flow rate based on the heat dissipation parameters, delivery pump information, and engine information; S72: Determine the required airflow temperature by combining water flow rate, air flow rate, and heating temperature; S73: Determine the movement parameters for controlling the distance between the air duct and the engine (3) based on the required airflow temperature, duct information and ambient temperature; S74: Corrects cleaning commands by moving parameters and preset dual-pass commands.

9. The control method for a gasoline-powered cleaning machine according to claim 8, characterized in that, After determining the movement parameters, the following is included: S80: Determine the effective distance range based on duct information and engine information; S81: When the movement parameter is greater than the upper limit of the effective distance interval, the upper limit of the effective distance interval is defined as the actual movement parameter; S82: Determine the actual airflow temperature by back-calculating based on actual movement parameters, duct information, and ambient temperature; S83: Determine the basic airflow and basic waterflow based on the delivery pump information and engine information; S84: Adjusts heat dissipation parameters based on actual airflow temperature, basic airflow, and basic waterflow. S85: Corrects cleaning commands using revised heat dissipation parameters.

10. The control method for a gasoline-powered cleaning machine according to claim 9, characterized in that, Methods for correcting heat dissipation parameters include: S90: Determine the supplementary heat based on the basic water flow rate and the temperature rise; S91: Determine the supplemental ventilation rate by combining the supplemental heat and the actual airflow temperature; S92: Determine the ventilation difference by supplemental ventilation and basal ventilation; S93: Corrected heat dissipation parameters are obtained based on ventilation difference matching.

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