Water hammer pulse jet cleaning device and control method thereof

Abstract

The application relates to the field of cleaning equipment, in particular to a water hammer pulse jet cleaning device and a control method thereof. The device comprises a water hammer pulse generation unit, a nozzle jet device and a control unit connected with the water hammer pulse generation unit in sequence. The control unit is used for controlling the water hammer pulse generation unit to generate an initial water hammer pulse, so that the equivalent total impact stress of a target water hammer pulse output through the nozzle jet device is greater than the equivalent adhesion of a pollution layer and a cleaned object. Through the active regulation of the control unit on the water hammer pulse generation unit, the equivalent total impact stress of the target water hammer pulse output to the nozzle jet device on the pollution layer is greater than the equivalent adhesion of the pollutants, so that the pollution layer can be quickly stripped and removed without relying on chemical reagents and increasing the steady-state pump pressure, the cleaning efficiency is significantly improved, and the risk of structural damage to the pipeline and equipment caused by uncontrollable water hammer pulses is avoided.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment, and in particular to a water hammer pulse jet cleaning device and its control method. Background Technology

[0002] Existing technologies for cleaning pipes, equipment, and household dishes mainly include continuous high- and medium-pressure water jet cleaning, water vortex turbulence cleaning for fruits and vegetables, chemical cleaning, and air-water pulse cleaning. Continuous jet cleaning requires high steady-state pressure and constant impact peeling force, and is not fast enough at removing stubborn stains.

[0003] Although air-water pulse cleaning can introduce a certain amount of transient impact, it often uses timed air intake or simple valve control methods, making it difficult to effectively control the transient pressure peak and pressure rise rate. Uncontrollable water hammer pulses may still be generated during the cleaning process, posing a risk to the safety of pipelines and equipment. Summary of the Invention

[0004] Therefore, it is necessary to provide a water hammer pulse jet cleaning device and its control method to address the above-mentioned technical problems.

[0005] In a first aspect, embodiments of this application provide a water hammer pulse jet cleaning device, the device comprising a water hammer pulse generating unit, a nozzle jetter, and a control unit connected in sequence to the water hammer pulse generating unit; The control unit is used to control the water hammer pulse generating unit to generate an initial water hammer pulse, such that the equivalent total impact stress of the target water hammer pulse output through the nozzle jet is greater than the equivalent adhesion force between the contaminant layer and the object being cleaned.

[0006] Therefore, this application achieves rapid peeling and removal of the contaminant layer by actively controlling the water hammer pulse generation unit through the control unit, so that the equivalent total impact stress generated by the target water hammer pulse output to the nozzle jet is greater than the equivalent adhesion force of the contaminant. This enables rapid peeling and removal of the contaminant layer without relying on chemical reagents or increasing the steady-state pump pressure, significantly improving cleaning efficiency. At the same time, it avoids the risk of structural damage to pipelines and equipment caused by uncontrollable water hammer pulses, combining high efficiency and safety.

[0007] In some embodiments, the control unit determines the operating parameters of the water hammer pulse generating unit according to the type of contamination layer, so as to control the water hammer pulse generating unit to generate an initial water hammer pulse.

[0008] Therefore, this application can adaptively match the working parameters of the corresponding water hammer pulse generating unit according to the difference in equivalent adhesion strength of different types of contamination layers, so that the equivalent total impact stress of the target water hammer pulse output by the nozzle jet can be accurately adapted to the peeling threshold of the current contamination layer. This avoids cleaning failure or excessive cleaning time due to insufficient impact stress, and also avoids damage to the surface of the substrate being cleaned due to excessive impact stress.

[0009] In some embodiments, the water hammer pulse generating unit includes a controllable pulse valve group, and the operating parameters of the water hammer pulse generating unit include valve group opening degree, valve opening speed, valve closing speed, pulse frequency, and duty cycle.

[0010] In some embodiments, a water hammer pulse modulation unit is further included, connected between the hammer pulse generating unit and the nozzle jetter. The control unit is further configured to control the water hammer pulse modulation unit to modulate the initial water hammer pulse to meet a first preset condition.

[0011] Therefore, after being modulated by the water hammer pulse modulation unit, the initial water hammer pulse is confined within the safety boundary defined by the first preset condition, thus avoiding structural damage to the pipeline and the substrate being cleaned caused by the original water hammer pulse due to excessively high peak value or excessively fast rise rate.

[0012] In some embodiments, the water hammer pulse modulation unit is a variable volume buffer chamber, and the control unit configures the pressure and / or volume of the variable volume buffer chamber to modulate the initial water hammer pulse, such that the peak pressure of the modulated initial water hammer pulse is less than the pressure safety value, and the pressure rise rate is less than the rate safety value.

[0013] In some embodiments, a pressure sensor is also provided at the output end of the water hammer pulse modulation unit, and the control unit is further configured to adjust the water hammer pulse generating unit according to the pressure parameters detected by the pressure sensor, so that the modulated initial water hammer pulse meets a second preset condition.

[0014] Therefore, the control unit obtains the pressure parameters of the modulated water hammer pulse in real time through a pressure sensor arranged downstream of the water hammer pulse modulation unit, and performs closed-loop feedback adjustment of the water hammer pulse generating unit based on the pressure parameters, so that the peak pressure and pressure rise rate of the modulated initial water hammer pulse are clamped in real time within the safe range defined by the second preset condition, thereby effectively overcoming the water hammer pulse output drift problem caused by disturbance factors such as water source pressure fluctuations, pipeline impedance changes or valve group operation deviations, and ensuring that each output pulse is continuously and stably within the preset safety boundary.

[0015] In some embodiments, the control unit determines the peak pressure and pressure rise rate of the modulated initial water hammer pulse based on the pressure parameters detected by the pressure sensor, and adjusts the water hammer pulse generating unit accordingly, so that the peak pressure of the modulated initial water hammer pulse is less than a preset pressure value and the pressure rise rate is less than a preset rate value.

[0016] Secondly, embodiments of this application propose a control method for a water hammer pulse jet cleaning device, applied to the device described in the first aspect, the method comprising: The water hammer pulse generating unit is controlled to generate an initial water hammer pulse, such that the equivalent total impact stress of the target water hammer pulse output through the nozzle jet is greater than the equivalent adhesion force between the contaminant layer and the object being cleaned.

[0017] Therefore, this application, through active control of the water hammer pulse generation unit, ensures that the equivalent total impact stress generated by the target water hammer pulse output to the nozzle jet is greater than the equivalent adhesion force of the contaminants on the contaminant layer. This enables rapid peeling and removal of the contaminant layer without relying on chemical reagents or increasing the steady-state pump pressure, significantly improving cleaning efficiency. At the same time, it avoids the risk of structural damage to pipelines and equipment caused by uncontrollable water hammer pulses, combining high efficiency and safety.

[0018] In some embodiments, the method further includes: The water hammer pulse modulation unit is controlled to modulate the initial water hammer pulse to meet a first preset condition.

[0019] Therefore, after being modulated by the water hammer pulse modulation unit, the initial water hammer pulse is confined within the safety boundary defined by the first preset condition, thus avoiding structural damage to the pipeline and the substrate being cleaned caused by the original water hammer pulse due to excessively high peak value or excessively fast rise rate.

[0020] In some embodiments, the method further includes: Based on the pressure parameters detected by the pressure sensor, the water hammer pulse generating unit is adjusted to ensure that the modulated initial water hammer pulse meets the second preset condition.

[0021] Therefore, the pressure parameters of the modulated water hammer pulse are obtained in real time by the pressure sensor, and the water hammer pulse generating unit is adjusted in a closed loop based on the pressure parameters. This ensures that the peak pressure and pressure rise rate of the modulated initial water hammer pulse are kept within the safe range defined by the second preset condition in real time. This effectively overcomes the problem of water hammer pulse output drift caused by disturbances such as water source pressure fluctuations, pipeline impedance changes, or valve group operation deviations, and ensures that each output pulse is continuously and stably within the preset safety boundary. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of the water hammer pulse jet cleaning device in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of the water hammer pulse jet cleaning device in another embodiment provided in this application; Figure 3 A schematic diagram of the water hammer pulse jet cleaning device in another embodiment provided in this application; Figure 4 A schematic flowchart of a cleaning method using a water hammer pulse jet cleaning device in one embodiment provided in this application. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application. Furthermore, it is understood that although the efforts made in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, modifications to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0024] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0025] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application means two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The terms “first,” “second,” “third,” etc., used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0026] Figure 1 This is a schematic diagram of the structure of a water hammer pulse jet cleaning device in one embodiment of this application. Figure 1 As shown, the device includes: a water hammer pulse generating unit, a nozzle jet generator, and a control unit connected in sequence.

[0027] The water hammer pulse generating unit uses a controllable pulse valve group to receive the steady-state flow from the water pump and generate the initial water hammer pulse.

[0028] The control unit is used to control the water hammer pulse generating unit to generate an initial water hammer pulse, such that the equivalent total impact stress of the target water hammer pulse output through the nozzle jet is greater than the equivalent adhesion force between the contaminant layer and the object being cleaned.

[0029] This application achieves rapid peeling and removal of the contaminant layer by actively controlling the water hammer pulse generation unit through the control unit, so that the equivalent total impact stress generated by the target water hammer pulse output to the nozzle jet is greater than the equivalent adhesion force of the contaminant. This enables rapid peeling and removal of the contaminant layer without relying on chemical reagents or increasing the steady-state pump pressure, significantly improving cleaning efficiency. At the same time, it avoids the risk of structural damage to pipelines and equipment caused by uncontrollable water hammer pulses, combining high efficiency and safety.

[0030] In some embodiments, the control unit determines the operating parameters of the water hammer pulse generating unit according to the type of contamination layer, so as to control the water hammer pulse generating unit to generate an initial water hammer pulse.

[0031] The water hammer pulse generating unit includes a controllable pulse valve group, and the operating parameters of the water hammer pulse generating unit include valve group opening degree, valve opening speed, valve closing speed, pulse frequency, and duty cycle.

[0032] The storage module of the control unit pre-stores multiple preset cleaning modes. Each preset cleaning mode corresponds to a different type of contamination layer and its equivalent adhesion strength range, and is associated with the operating parameters of its respective water hammer pulse generation unit. The operating parameters include, but are not limited to: valve opening degree, valve opening speed, valve closing speed, pulse frequency, and duty cycle of the controllable pulse valve group.

[0033] The user (operator) selects the corresponding cleaning mode based on the type of contamination layer on the object to be cleaned via an input interface (e.g., touch screen, knob, or button). The control unit responds to the user's selection command, reads the operating parameters associated with the mode, and controls the controllable pulse valve group of the water hammer pulse generator unit to generate an initial water hammer pulse with corresponding amplitude, rise rate, and frequency.

[0034] This application can adaptively match the working parameters of the corresponding water hammer pulse generation unit according to the difference in equivalent adhesion strength of different types of contamination layers. This allows the equivalent total impact stress of the target water hammer pulse output by the nozzle jet to be accurately matched with the current peeling threshold of the contamination layer. This avoids cleaning failure or excessive cleaning time due to insufficient impact stress, and also avoids damage to the surface of the substrate being cleaned due to excessive impact stress.

[0035] Let the equivalent adhesion force between the contaminant layer and the object being cleaned be... To achieve effective stripping, the equivalent total impact stress generated by the target water hammer pulse output by the nozzle jet at the contaminant layer interface must be such that... satisfy:

[0036] Consider the direct superposition of the target water hammer pulse on the stagnation zone:

[0037] in, The water hammer pressure rise value reaching the nozzle ejector front cavity after being modulated by the water hammer pulse modulation unit. For jet flow pressure term, The density of the fluid.

[0038] Instantaneous velocity at nozzle ejector outlet Total pressure in the nozzle ejector front chamber The relationship is given by Bernoulli's equation:

[0039] in, For flow coefficient, To spray under external environmental pressure, This represents the steady-state initial pressure inside the pipe.

[0040] The calculated instantaneous velocity at the nozzle ejector outlet Substituting into the superposition formula, we obtain the water hammer pressure rise value. .

[0041] Let the density of the liquid inside the pipe be... ρ Pressure wave velocity a Given the change in flow velocity Δv, the transient pressure rise due to water hammer is:

[0042] Value enhancement through water hammer pressure Substituting into the formula, the change in flow velocity Δv is calculated.

[0043] The valve assembly opening determines the effective flow area of ​​the valve orifice. Under a constant system flow rate, when the valve opens from the closed state to a certain opening degree, the liquid velocity flowing through that orifice will change accordingly. The larger the opening degree, the greater the increase in flow area and the greater the change in velocity. Therefore, based on the required velocity change Δv, combined with the pipe cross-sectional area and the flow area characteristics of the valve orifice, the required valve assembly opening value can be determined in reverse.

[0044] The valve opening speed determines the time history of flow velocity change, which in turn directly affects the rate of rise of water hammer pressure. The faster the valve opens, the more drastic the flow velocity change, and the higher the rate of rise of water hammer pressure; conversely, the slower the valve opens, the more gradual the rise rate. Therefore, the control unit can actively control the rate of rise of water hammer pressure by adjusting the valve opening time.

[0045] The pulse frequency determines the number of impacts per unit time. According to the fatigue stripping principle, contaminants accumulate damage under repeated pulse impacts, and stripping occurs when the accumulated damage reaches a certain level. A higher pulse frequency means more impacts per unit time, which helps accelerate the accumulation of damage, but the fluid recovery time within each pulse cycle must also be considered. The control unit determines the optimal pulse frequency based on the fatigue stripping characteristics of the contaminant layer and the system's recovery characteristics. The duty cycle determines the proportion of valve opening time per unit cycle, affecting the average flow rate and basic dynamic pressure level of the jet, and can be adaptively set according to cleaning efficiency and energy consumption requirements.

[0046] In some embodiments, such as Figure 2 As shown, the water hammer pulse jet cleaning device also includes a water hammer pulse modulation unit connected between the hammer pulse generating unit and the nozzle jetter. The control unit is also used to control the water hammer pulse modulation unit to modulate the initial water hammer pulse to meet a first preset condition.

[0047] After being modulated by the water hammer pulse modulation unit, the initial water hammer pulse is confined within the safety boundary defined by the first preset condition, thus avoiding structural damage to the pipeline and the substrate being cleaned caused by the original water hammer pulse due to excessively high peak value or excessively fast rise rate.

[0048] Specifically, the water hammer pulse modulation unit is a variable volume buffer chamber. The control unit configures the pressure and / or volume of the variable volume buffer chamber to modulate the initial water hammer pulse, such that the peak pressure of the modulated initial water hammer pulse is less than the pressure safety value, and the pressure rise rate is less than the rate safety value.

[0049] The total pressure in the front chamber of the nozzle ejector satisfy:

[0050] in, Represents displacement The second derivative with respect to time, which is acceleration , Displacement The first derivative with respect to time, which is velocity , Represents the equivalent stiffness of the gas. Represents damping.

[0051] The gas equivalent stiffness (approximated by adiabatic compression) satisfies:

[0052] Where γ represents the adiabatic coefficient, This represents the pressure in the variable volume buffer chamber. This represents the volume of the variable-volume buffer chamber.

[0053] When the volume of the variable volume buffer cavity is increased At that time, gas equivalent stiffness Decreasing the pressure in the variable volume buffer chamber lowers the system's natural frequency, enhancing the filtering effect on the high-frequency components of the water hammer pulse, resulting in stronger peak attenuation and a slower rise rate; At that time, gas equivalent stiffness Reducing the volume also results in a stronger buffering effect; simultaneously increasing the volume of the variable-volume buffer cavity... And reduce stress At that time, the equivalent stiffness of both for the gas The combined effect of these reductions maximizes peak attenuation and rate of rise suppression. Conversely, a weaker buffering effect retains more transient impact energy for cleaning. Therefore, the control unit continuously adjusts the equivalent stiffness of the buffer chamber by regulating the pressure and / or volume of the variable-volume buffer chamber, thereby controlling the peak pressure and rate of rise of the modulated water hammer pulse.

[0054] In some embodiments, such as Figure 3 As shown, the water hammer pulse jet cleaning device also includes a pressure sensor located at the output end of the water hammer pulse modulation unit. The control unit is further configured to adjust the water hammer pulse generating unit based on the pressure parameters detected by the pressure sensor, so that the modulated initial water hammer pulse meets the second preset condition.

[0055] The control unit acquires the pressure parameters of the modulated water hammer pulse in real time through a pressure sensor located downstream of the water hammer pulse modulation unit, and performs closed-loop feedback adjustment of the water hammer pulse generating unit based on the pressure parameters. This ensures that the peak pressure and pressure rise rate of the modulated initial water hammer pulse are kept within the safe range defined by the second preset condition in real time, thereby effectively overcoming the water hammer pulse output drift problem caused by disturbances such as water source pressure fluctuations, pipeline impedance changes, or valve group operation deviations, and ensuring that each output pulse is continuously and stably within the preset safety boundary.

[0056] Specifically, the control unit determines the peak pressure and pressure rise rate of the modulated initial water hammer pulse based on the pressure parameters detected by the pressure sensor, and adjusts the water hammer pulse generating unit accordingly, so that the peak pressure of the modulated initial water hammer pulse is less than a preset pressure value and the pressure rise rate is less than a preset rate value.

[0057] When the control unit determines, based on the detection value of the pressure sensor, that the modulated water hammer pressure wave meets the second preset condition, the control unit maintains the current operating parameters of the water hammer pulse generating unit unchanged and continues to output water hammer pulses with the current parameters. When the control unit determines, based on the detection value of the pressure sensor, that the modulated water hammer pressure wave does not meet the second preset condition, i.e., the modulated peak pressure exceeds the preset pressure value, or the modulated pressure rise rate exceeds the preset rate value, or both exceed the preset values, the control unit immediately performs feedback adjustment on the water hammer pulse generating unit to correct the output waveform of the next pulse cycle.

[0058] When the modulated peak pressure exceeds the preset pressure value, the control unit reduces the opening of the controllable pulse valve assembly, thereby reducing the flow rate change caused by the valve action. According to the principle of water hammer pressure rise, the reduction in flow rate change will directly lead to a decrease in the original water hammer pressure rise amplitude. After being shaped by the water hammer pulse modulation unit, the peak pressure at its output end decreases accordingly until the second preset condition is met. Conversely, the control unit can increase the valve opening amplitude in the opposite direction to release stronger transient impact energy.

[0059] When the modulated pressure rise rate exceeds the safe rate value, the control unit slows down the opening speed of the controllable pulse valve assembly, making the flow rate change process smoother, thereby reducing the rise rate of water hammer pressure. This reduced original water hammer pressure rise is then shaped by the water hammer pulse modulation unit, resulting in a corresponding decrease in the pressure rise rate at its output end until the second preset condition is met. Conversely, the control unit can appropriately increase the valve opening speed.

[0060] When the modulated peak pressure or pressure rise rate approaches the preset value, the control unit can reduce the pulse frequency or reduce the duty cycle to provide the system with more recovery time, thereby stabilizing the transient response of the fluid within each pulse cycle and indirectly reducing the peak pressure and rise rate.

[0061] like Figure 4 As shown in the embodiment of this application, the cleaning process of the water hammer pulse jet cleaning device is as follows: S1: The control unit determines the operating parameters of the water hammer pulse generating unit according to the type of the fouling layer, and sends a control signal including the operating parameters to the controllable pulse valve group to generate the initial water hammer pulse. S2: The water hammer pulse enters the water hammer pulse modulation unit, and the pressure and / or volume of the variable volume buffer chamber are configured to modulate the initial water hammer pulse, so that the peak pressure of the modulated initial water hammer pulse is less than the pressure safety value, and the pressure rise rate is less than the rate safety value. S3: The control unit determines the peak pressure and pressure rise rate of the modulated initial water hammer pulse based on the pressure parameters detected by the pressure sensor, and adjusts the water hammer pulse generating unit accordingly, so that the peak pressure of the modulated initial water hammer pulse is less than the preset pressure value and the pressure rise rate is less than the preset rate value. S4: The equivalent total impact stress of the target water hammer pulse output by the nozzle jet is greater than the equivalent adhesion force between the contaminant layer and the object being cleaned.

[0062] Secondly, embodiments of this application propose a control method for a water hammer pulse jet cleaning device, applied to the device described in the first aspect, the method comprising: The water hammer pulse generating unit is controlled to generate an initial water hammer pulse, such that the equivalent total impact stress of the target water hammer pulse output through the nozzle jet is greater than the equivalent adhesion force between the contaminant layer and the object being cleaned.

[0063] This application achieves rapid peeling and removal of the contaminant layer by actively controlling the water hammer pulse generation unit, so that the equivalent total impact stress generated by the target water hammer pulse output to the nozzle jet is greater than the equivalent adhesion force of the contaminant. This enables rapid peeling and removal of the contaminant layer without relying on chemical reagents or increasing the steady-state pump pressure, significantly improving cleaning efficiency. At the same time, it avoids the risk of structural damage to pipelines and equipment caused by uncontrollable water hammer pulses, combining high efficiency and safety.

[0064] In some embodiments, the operating parameters of the water hammer pulse generating unit are determined according to the type of contamination layer in order to control the water hammer pulse generating unit to generate an initial water hammer pulse.

[0065] In some embodiments, the operating parameters of the water hammer pulse generating unit include valve group opening degree, valve opening speed, valve closing speed, pulse frequency, and duty cycle.

[0066] In some embodiments, the method further includes: The water hammer pulse modulation unit is controlled to modulate the initial water hammer pulse to meet a first preset condition.

[0067] After being modulated by the water hammer pulse modulation unit, the initial water hammer pulse is confined within the safety boundary defined by the first preset condition, thus avoiding structural damage to the pipeline and the substrate being cleaned caused by the original water hammer pulse due to excessively high peak value or excessively fast rise rate.

[0068] In some embodiments, the pressure and / or volume of the variable volume buffer chamber are configured to modulate the initial water hammer pulse, such that the peak pressure of the modulated initial water hammer pulse is less than the pressure safety value, and the pressure rise rate is less than the rate safety value.

[0069] In some embodiments, the method further includes: Based on the pressure parameters detected by the pressure sensor, the water hammer pulse generating unit is adjusted to ensure that the modulated initial water hammer pulse meets the second preset condition.

[0070] The pressure parameters of the modulated water hammer pulse are acquired in real time by a pressure sensor, and the water hammer pulse generating unit is adjusted in a closed loop based on the pressure parameters. This ensures that the peak pressure and pressure rise rate of the modulated initial water hammer pulse are kept within the safe range defined by the second preset condition in real time. This effectively overcomes the problem of water hammer pulse output drift caused by disturbances such as water source pressure fluctuations, pipeline impedance changes, or valve group operation deviations, and ensures that each output pulse is continuously and stably within the preset safety boundary.

[0071] In some embodiments, based on the pressure parameters detected by the pressure sensor, the peak pressure and pressure rise rate of the modulated initial water hammer pulse are determined, and the water hammer pulse generating unit is adjusted accordingly, so that the peak pressure of the modulated initial water hammer pulse is less than a preset pressure value, and the pressure rise rate is less than a preset rate value.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A water hammer pulse jet cleaning device, characterized in that, The device includes a water hammer pulse generating unit, a nozzle jet generator, and a control unit connected in sequence to the water hammer pulse generating unit. The control unit is used to control the water hammer pulse generating unit to generate an initial water hammer pulse, such that the equivalent total impact stress of the target water hammer pulse output through the nozzle jet is greater than the equivalent adhesion force between the contaminant layer and the object being cleaned.

2. The apparatus according to claim 1, characterized in that, The control unit determines the operating parameters of the water hammer pulse generating unit according to the type of contamination layer, so as to control the water hammer pulse generating unit to generate an initial water hammer pulse.

3. The apparatus according to claim 2, characterized in that, The water hammer pulse generating unit includes a controllable pulse valve group, and the operating parameters of the water hammer pulse generating unit include valve group opening degree, valve opening speed, valve closing speed, pulse frequency, and duty cycle.

4. The apparatus according to claim 1, characterized in that, It also includes a water hammer pulse modulation unit connected between the hammer pulse generating unit and the nozzle jetter, and the control unit is further configured to control the water hammer pulse modulation unit to modulate the initial water hammer pulse to meet a first preset condition.

5. The apparatus according to claim 4, characterized in that, The water hammer pulse modulation unit is a variable volume buffer chamber. The control unit configures the pressure and / or volume of the variable volume buffer chamber to modulate the initial water hammer pulse, such that the peak pressure of the modulated initial water hammer pulse is less than the pressure safety value, and the pressure rise rate is less than the rate safety value.

6. The apparatus according to claim 4, characterized in that, It also includes a pressure sensor located at the output end of the water hammer pulse modulation unit. The control unit is further configured to adjust the water hammer pulse generation unit based on the pressure parameters detected by the pressure sensor, so that the modulated initial water hammer pulse meets the second preset condition.

7. The apparatus according to claim 6, characterized in that, The control unit determines the peak pressure and pressure rise rate of the modulated initial water hammer pulse based on the pressure parameters detected by the pressure sensor, and adjusts the water hammer pulse generating unit accordingly, so that the peak pressure of the modulated initial water hammer pulse is less than a preset pressure value and the pressure rise rate is less than a preset rate value.

8. A control method for a water hammer pulse jet cleaning device, applied to the device as described in any one of claims 1-7, characterized in that, The method includes: The water hammer pulse generating unit is controlled to generate an initial water hammer pulse, such that the equivalent total impact stress of the target water hammer pulse output through the nozzle jet is greater than the equivalent adhesion force between the contaminant layer and the object being cleaned.

9. The method according to claim 8, characterized in that, The method further includes: The water hammer pulse modulation unit is controlled to modulate the initial water hammer pulse to meet a first preset condition.

10. The method according to claim 8, characterized in that, The method further includes: Based on the pressure parameters detected by the pressure sensor, the water hammer pulse generating unit is adjusted to ensure that the modulated initial water hammer pulse meets the second preset condition.

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