CN113217145A

CN113217145A - Automatic cleaning system for particle filter

Info

Publication number: CN113217145A
Application number: CN202110681437.6A
Authority: CN
Inventors: 项昶斌; 张秦涛; 李建臣; 陈立峰; 齐明武; 娄立武
Original assignee: Zhejiang Yinlun Intelligent Equipment Co ltd
Current assignee: Zhejiang Yinlun Intelligent Equipment Co ltd
Priority date: 2021-06-19
Filing date: 2021-06-19
Publication date: 2021-08-06
Anticipated expiration: 2041-06-19
Also published as: CN113217145B

Abstract

The present invention provides an automatic cleaning system for a particulate filter for rapidly cleaning a DPF by a high temperature air flow, comprising: at least one automatic cleaning device for the particle filter; and a server which is in communication connection with the automatic particulate filter cleaning device and the management terminal, respectively, wherein the server has a theoretical heating curve storage unit and a historical heating curve storage unit, the theoretical heating curve storage unit stores a predetermined theoretical heating processing curve, the historical heating curve storage unit stores a historical heating processing curve generated when the automatic particulate filter cleaning device cleans the particulate filter, and the control device performs feedback control on the heating unit, the air flow driving unit and the air intake valve based on the processing temperature at the current moment and the theoretical heating processing curve, and performs compensation control based on the temperature change of the historical heating processing curve at the subsequent moment on the basis of the feedback control, so that the processing temperature conforms to the predetermined heating processing curve.

Description

Automatic cleaning system for particle filter

Technical Field

The invention belongs to the technical field of cleaning of particle filters, and particularly relates to an automatic cleaning system of a particle filter.

Background

Diesel vehicle exhaust system includes the blast pipe and sets up the Diesel Particulate Filter (DPF for short) in the blast pipe, and when tail gas in the blast pipe passed through DPF, Particulate matter and greasy dirt in the tail gas were adsorbed by DPF's Filter core and were filtered to prevent that tail gas from causing the pollution to the air. However, as the operation time of the exhaust system of the diesel vehicle increases, particulate matters and oil stains inside the DPF filter element are accumulated, which results in an increase in exhaust back pressure of the vehicle, an increase in fuel consumption of the vehicle, and a decrease in power. Further, when the DPF filter element is clogged seriously, exhaust gas cannot be discharged.

The conventional solution to the above problem is to periodically remove the DPF from the exhaust system of the diesel vehicle and then clean (clean) the DPF to restore the DPF to a normal operating level.

Among them, there are various methods for cleaning the DPF, and a heating regeneration cleaning is generally adopted. The principle of heating, regenerating and cleaning is to burn and oxidize the particulate matters and the like adsorbed in the DPF by high-temperature heating, thereby realizing the cleaning purpose. The heat regeneration cleaning is usually achieved by DPF heating furnaces that heat by natural heat conduction and rely on resistance wires coiled in the furnace cavity to heat the air and transfer heat to the DPF by heat radiation.

However, since the thermal conductivity of the DPF material is poor and accurate temperature control of the DPF heater is difficult, the DPF is easily heated unevenly. If the temperature leads to DPF material fracture easily and leads to the fact the damage if the temperature is too high, if the temperature is low then lead to the particulate matter burning inadequately and then influence the cleaning performance easily.

In addition, heating the DPF internal temperature to a cleaning temperature of about 600 ℃ in a DPF heating furnace usually requires 2 to 3 hours, and the time taken for one cleaning is long and the energy consumption is high.

Disclosure of Invention

In order to solve the problems, the invention provides an automatic cleaning system of a particle filter for rapidly cleaning DPF through high-temperature air flow, which adopts the following technical scheme:

the invention provides an automatic cleaning system of a particle filter, which is used for automatically cleaning the particle filters with different specifications and is characterized by comprising the following components: at least one automatic cleaning device for the particle filter; a management terminal held by an operation manager; and a server in communication connection with the particulate filter automatic cleaning apparatus and the management terminal, respectively, wherein the particulate filter automatic cleaning apparatus includes a particulate filter cleaning device and a control device, the particulate filter cleaning device includes: a cleaning chamber for placing a particulate filter; a heating unit for heating the air flow; an air flow driving unit for providing a driving force for the flow of the air flow; the air inlet unit is used for introducing external unit air into the cleaning chamber and is provided with an air inlet valve used for controlling the introduction of the external unit air; and a processing temperature sensing unit for sensing a temperature of an air flow entering the cleaning chamber as a processing temperature, the server having a theoretical heating curve storage unit, a historical heating curve storage unit, a heating curve acquisition unit, and a service side communication unit, the theoretical heating curve storage unit storing a predetermined theoretical heating processing curve, the historical heating curve storage unit storing a historical heating processing curve generated when the automatic particulate filter cleaning device cleans the particulate filter, the heating curve acquisition unit acquiring the theoretical heating processing curve and the historical heating processing curve and transmitting the same to the control device through the service side communication unit, the control device feedback-controlling the heating unit, the air flow driving unit, and the air intake valve based on a processing temperature at a current time and the theoretical heating processing curve, and performing compensation-control based on a temperature change of the historical heating processing curve at a subsequent time on the basis of the feedback-control, so that the process temperature conforms to a predetermined heat treatment profile.

The automatic cleaning system for the particulate filter provided by the present invention may further have technical features in that the particulate filter cleaning device further includes an air flow input unit for inputting a high-temperature air flow formed after being heated by the heating unit into the cleaning chamber, the processing temperature sensing unit is provided at the air flow input unit, the control device has a control unit, a timing unit, a current target temperature obtaining unit, and a temperature comparing unit, the control unit controls the timing unit to perform timing so as to obtain a current processing time in real time when the particulate filter cleaning device starts cleaning, the current target temperature obtaining unit obtains a temperature corresponding to the current processing time on a theoretical heating processing curve according to the current processing time as a current target temperature, the actual temperature obtaining unit obtains a temperature at a next moment on a historical heating processing curve according to the current processing time as a subsequent actual temperature, the control unit obtains the processing temperatures from the processing temperature sensing unit in real time to be used as current processing temperatures respectively, controls the temperature comparison unit to compare the current processing temperatures with the current target temperature to obtain a comparison result, further controls the temperature change prediction unit to predict and obtain the actual temperature change rate of the air flow according to the comparison result and the subsequent actual temperature, and controls the control unit to perform feedback control on the working state of at least one of the air inlet valve, the heating unit and the air flow driving unit according to the comparison result and perform compensation control on the basis of the feedback control according to the actual temperature change rate, so that the actual heating processing curves formed by the current processing temperatures conform to the preset heating processing curves.

The automatic particulate filter cleaning system according to the present invention may further include a control unit having an intake valve control unit, wherein the feedback control is: when the comparison result is that the current processing temperature is higher than the current target temperature, the intake valve control portion controls the intake valve to increase the opening degree according to a predetermined change value, so that the current processing temperature is decreased, and when the comparison result is that the current processing temperature is lower than the current target temperature, the intake valve control portion controls the intake valve to decrease the opening degree according to the predetermined change value, so that the current processing temperature is increased, and the compensation control is: the intake valve control portion sets the predetermined change value to a first change value when the actual temperature change rate is higher than a target temperature change rate on the theoretical heat treatment curve and a difference therebetween is higher than a predetermined change threshold, and sets the predetermined change value to a second change value when the actual temperature change rate is lower than the target temperature change rate and a difference therebetween is higher than the predetermined change threshold, the first change value being smaller than the second change value.

The automatic cleaning system for a particulate filter according to the present invention may further include a control unit having a heating control unit, wherein the feedback control is: when the comparison result shows that the current processing temperature is higher than the current target temperature, the heating control part controls the preset change value of the heating unit to reduce the power, so that the current processing temperature is reduced, and when the comparison result shows that the current processing temperature is lower than the current target temperature, the heating control part controls the preset change value of the heating unit to increase the power, so that the current processing temperature is increased, and the compensation control is as follows: the heating control portion sets the predetermined variation value to a first variation value when the actual temperature variation rate is higher than a target temperature variation rate on the theoretical heating process curve and a difference therebetween is higher than a predetermined variation threshold, and sets the predetermined variation value to a second variation value when the actual temperature variation rate is lower than the target temperature variation rate and a difference therebetween is higher than the predetermined variation threshold, the first variation value being smaller than the second variation value.

The automatic cleaning system for a particulate filter according to the present invention may further include a control unit having a drive control unit, wherein the feedback control is: when the comparison result shows that the current processing temperature is higher than the current target temperature, the drive control part controls the scheduled change value of the air flow driving unit to increase the driving force, so that the current processing temperature is reduced, and when the comparison result shows that the current processing temperature is lower than the current target temperature, the drive control part controls the scheduled change value of the air flow driving unit to decrease the driving force, so that the current processing temperature is increased, and the compensation control is as follows: the drive control section sets the predetermined change value to a first change value when the actual temperature change rate is higher than a target temperature change rate on the theoretical heat treatment curve and a difference therebetween is higher than a predetermined change threshold, and sets the predetermined change value to a second change value when the actual temperature change rate is lower than the target temperature change rate and a difference therebetween is higher than the predetermined change threshold, the first change value being smaller than the second change value. The drive control section sets the predetermined change value to a first change value when the actual temperature change rate is higher than a target temperature change rate on the theoretical heat treatment curve and a difference therebetween is higher than a predetermined change threshold, and sets the predetermined change value to a second change value when the actual temperature change rate is lower than the target temperature change rate and a difference therebetween is higher than the predetermined change threshold, the first change value being smaller than the second change value.

The automatic cleaning system for the particle filter provided by the invention can also have the technical characteristics, wherein the particulate filter cleaning device further comprises an auxiliary temperature sensing unit, the control device further comprises a temperature difference judgment unit, the control unit comprises a drive control part, the particulate filter cleaning device further comprises an air flow output unit, the air flow output unit is used for outputting high-temperature air flow in the cleaning chamber, the auxiliary temperature sensing unit is arranged in the cleaning chamber or on the high-temperature air flow output unit, the temperature of the high-temperature air flow flowing out of the cleaning chamber is sensed as an auxiliary temperature, the control unit obtains the auxiliary temperature from the auxiliary temperature sensing unit as a current auxiliary temperature, and controlling a temperature difference value judging unit to judge whether the difference value between the current processing temperature and the current auxiliary temperature is smaller than a preset temperature difference threshold value, and controlling an air flow driving unit to weaken the driving force when the temperature difference value judging unit judges that the difference value is not larger than the preset temperature difference threshold value.

The automatic cleaning system for a particulate filter according to the present invention may further include a control device having a high temperature maintenance phase end determination unit and a first temperature reduction phase end determination unit, and the particulate filter cleaning device further includes: an exhaust unit for exhausting the high temperature air flow, having an exhaust valve for controlling the exhaust of the high temperature air flow; and an air flow refluxing unit for refluxing the high temperature air flow from the air flow output unit to make the high temperature air flow circularly flow, the air flow refluxing unit is provided with a refluxing valve for controlling the refluxing of the high temperature air flow, the control unit is provided with a heating control part, an air inlet valve control part, an exhaust valve control part and a refluxing valve control part, a preset heating processing curve at least comprises a high temperature maintaining stage, a first cooling stage and a second cooling stage, the high temperature maintaining stage ending judgment unit judges whether the current processing time reaches the ending time of the high temperature maintaining stage, when the high temperature maintaining stage ending judgment unit judges that the current processing time reaches the ending time of the high temperature maintaining stage, the heating control part controls the heating unit to stop heating, the air inlet valve control part controls the air inlet valve to increase the opening degree, the first cooling stage ending judgment unit judges whether the current processing time reaches the ending time of the first cooling stage, and when the judgment unit for judging the end of the first cooling stage judges that the temperature is positive, the air inlet valve control part controls the air inlet valve to be completely opened, the exhaust valve control part controls the exhaust valve to be opened, the return valve control part controls the return valve to be closed, the temperature of the high-temperature air flow is maintained to be 550-700 ℃ in the high-temperature maintaining stage, and the duration time of the high-temperature maintaining stage is 5-30 min.

The automatic cleaning system for the particulate filter provided by the invention can also have the technical characteristics that the control device is also provided with a historical heating curve output unit, the server is also provided with a storage updating unit, after the particulate filter is cleaned, the control unit also controls the historical heating curve output unit to send the actual heating processing curve to the server as a historical heating processing curve, and the storage updating unit updates the received historical heating processing curve to the historical heating curve storage unit.

The automatic cleaning system for a particulate filter according to the present invention may further include a plurality of automatic cleaning apparatuses for a particulate filter, each of the automatic cleaning apparatuses having an apparatus number, the history heating curve storage unit storing a history heating processing curve and a model of a corresponding particulate filter, the management terminal including a management-side screen storage unit storing a model input screen, a management-side input display unit displaying a model input screen and allowing an operation manager to input a model of a particulate filter to be cleaned and an apparatus number of an automatic cleaning apparatus for a particulate filter for which cleaning is to be performed, and a management-side communication unit transmitting the apparatus number and the model to the server upon confirmation of input by the operation manager, the history heating processing curve acquired by the heating curve acquisition unit being a history heating part corresponding to the received model And the service side communication unit sends the theoretical heating processing curve and the historical heating processing curve to corresponding automatic cleaning equipment of the particle filter according to the equipment number.

The automatic cleaning system for a particulate filter according to the present invention may further include a management terminal having a management-side screen storage unit, a management-side input display unit, and a management-side communication unit, wherein the management-side screen storage unit stores a processing state display screen, the control device transmits the processing temperature to the management terminal via the server in real time, and the management-side input display unit displays the processing state display screen and displays an actual heating processing curve formed by the processing temperature for an operator to view.

The Particulate Filter cleaning system of the present invention can clean a Particulate Filter, such as a Diesel Particulate Filter (DPF) or a Gasoline Particulate Filter (GPF), for example. In addition, the particulate filter cleaning system can also clean other parts in the Exhaust system of the fuel vehicle, which need to clean particulate matters regularly, such as parts related to an Oxidation Catalytic converter (DOC), an Exhaust Gas recirculation system (EGR), a Selective Catalytic Reduction System (SCR), and the like; and the parts to be cleaned are only required to be placed in the cleaning chamber of the equipment, and the high-temperature air flow is ensured to pass through the parts, so that the cleaning can be realized. In order to achieve a more satisfactory cleaning effect when cleaning a component other than the particulate filter, it is also possible to select to replace the support portion of the particulate filter cleaning system suitable for cleaning the particulate filter with a support member adapted to the component.

Action and Effect of the invention

According to the automatic cleaning system for the particulate filter of the present invention, since the server and the particulate filter cleaning apparatus are provided, the server stores therein a theoretical heat treatment curve and a history heat treatment curve generated by the particulate filter cleaning apparatus when the particulate filter cleaning apparatus has cleaned the particulate filter in the past, and the control device performs feedback control of the heating unit, the air flow driving unit, and the air intake valve of the particulate filter cleaning apparatus according to the treatment temperature of the air flow entering the particulate filter and the theoretical heat treatment curve, it is possible to make the treatment temperature conform to the theoretical heat treatment curve, and it is ensured that the particulate filter can be quickly cleaned in a short time. Still because controlling means still can carry out compensation control to heating unit, air current drive unit and admission valve according to historical heat treatment curve, consequently can further make the processing temperature rise temperature and lower the temperature strictly according to theoretical heat treatment curve to prevent that the processing temperature from suddenly rising and suddenly falling and influencing the quality of particulate filter, can guarantee to have quick, effectual cleaning performance, can also wash particulate filter harmlessly.

Drawings

FIG. 1 is a block diagram of an automatic particulate filter cleaning system according to one embodiment of the present invention;

FIG. 2 is a block diagram of an automatic cleaning apparatus for a particulate filter according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an automatic cleaning apparatus for a particulate filter according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an automatic cleaning apparatus for a particulate filter according to an embodiment of the present invention;

FIG. 5 is a functional block diagram of an automatic cleaning apparatus and a control apparatus for a particulate filter according to an embodiment of the present invention;

FIG. 6 is a block diagram of a server according to an embodiment of the invention;

FIG. 7 is a schematic illustration of a theoretical heat treatment profile in one embodiment of the present invention;

FIG. 8 is a graph illustrating a historical heat treatment profile in accordance with one embodiment of the present invention;

FIG. 9 is a diagram illustrating a medium size input screen according to an embodiment of the present invention;

FIG. 10 is a flow chart of a particulate filter cleaning step in accordance with one embodiment of the present invention;

FIG. 11 is a functional block diagram of an automatic cleaning apparatus and a control apparatus for a particulate filter according to a second embodiment of the present invention;

FIG. 12 is a flow chart of a particulate filter cleaning step in a second embodiment of the present invention;

FIG. 13 is a functional block diagram of an automatic cleaning apparatus and a control apparatus for a particulate filter according to a third embodiment of the present invention;

FIG. 14 is a flow chart of a particulate filter cleaning step in a third embodiment of the present invention;

FIG. 15 is a functional block diagram of an automatic cleaning apparatus and a control apparatus for a particulate filter according to a fourth embodiment of the present invention;

FIG. 16 is a flow chart of a cleaning step of a particulate filter in accordance with a fourth embodiment of the present invention; and

fig. 17 is a schematic view of a theoretical heat treatment curve in a modification of the present invention.

Detailed Description

In order to make the technical means, the original characteristics, the achieved objects and the effects of the present invention easily understood, the automatic cleaning system for a particulate filter of the present invention will be described in detail with reference to the following embodiments and the accompanying drawings.

< example one >

FIG. 1 is a block diagram of an automatic particulate filter cleaning system according to an embodiment of the present invention.

As shown in fig. 1, the automatic particulate filter cleaning system 100 has n automatic particulate filter cleaning apparatuses 101, a server 102, a management terminal 103, and a communication network 104a and a communication network 104 b.

The server 102 is communicatively connected to each particulate filter automatic cleaning apparatus 101 via a communication network 104a, and is communicatively connected to the management terminal 103 via a communication network 104 b. In the present embodiment, the first and second electrodes are,

fig. 2 is a block diagram of an automatic cleaning apparatus for a particulate filter according to a first embodiment of the present invention, and fig. 3 is a schematic structural diagram of the automatic cleaning apparatus for a particulate filter according to the first embodiment of the present invention.

As shown in fig. 2 and 3, the particulate filter cleaning apparatus 101 includes a cabinet 2, a particulate filter automatic cleaning device 3, and a control device 4.

The cabinet body 2 is a stainless steel cuboid cabinet, four supporting legs 5 are fixed on four corners of the bottom surface respectively, so that the cabinet body 2 has a certain distance with the ground, and heat dissipation is facilitated.

The control device 4 is installed on the cabinet 2 and controls the operation of the automatic cleaning device 3 for the particulate filter.

FIG. 4 is a schematic structural diagram of an automatic cleaning apparatus for a particulate filter according to an embodiment of the present invention; fig. 5 is a functional block diagram of an automatic cleaning device and a control device for a particulate filter according to an embodiment of the present invention.

As shown in fig. 4 and 5, the automatic particulate filter cleaning device 3 is mounted in the cabinet 2, and includes an air flow driving unit 6, an air flow circulating unit 7, a heating unit 8, an air flow input unit 9, a cleaning chamber 10, an air flow output unit 11, an air intake unit 32, an exhaust unit 33, a treatment temperature sensor 40, a first auxiliary temperature sensor 41, and a second auxiliary temperature sensor 42.

The air flow driving unit 6 has a driving motor 12, a blower 13, and a driving duct 14. The driving motor 12 is arranged at the top of the cabinet body 2; the blower 13 is connected to an output end of the driving motor 12, and has an air inlet 15 and an air outlet 16. In the present embodiment, the blower 13 is capable of drawing air from the air inlet 15, forming an air flow and discharging it from the air outlet 16 under the driving of the driving motor 12. The drive duct 14 communicates with an air outlet 16 of the blower 13, and an air flow is formed from the blower 13 into the drive duct 14.

The air flow return unit 7 is a delivery duct which communicates with a drive duct 14, through which the air flow enters the delivery duct 14. In the present embodiment, the air flow returning unit 7 has a return valve 37 for controlling the return flow of the high-temperature air flow.

The heating unit 8 is communicated with the air flow refluxing unit 7, and can heat the air flow delivered by the air flow refluxing unit 7 to form a high-temperature air flow.

The air flow input unit 9 is a pipe, and is communicated with the heating unit 8, and is used for inputting high-temperature air flow formed after the heating unit heats the air flow into the cleaning chamber 10.

Cleaning chamber 10 is the cuboid case, including heat preservation cavity 29 heat preservation cavity and install the heat preservation door 30 on heat preservation cavity 29, heat preservation cavity 29 and heat preservation door 30 all include the metal level and set up the heat preservation in the metal level outside, are provided with a plurality of through holes 31 on the metal level.

In this embodiment, the purge chamber 10 is located above the heating unit 8 and communicates with the air flow input unit 9. The particulate filter is placed in the cleaning chamber 10, and the high-temperature air flow generated by the heating unit 8 enters the cleaning chamber 10 through the air flow input unit 9 to clean the particles deposited in the particulate filter.

The air flow output unit 11 is a duct, and communicates with the purge chamber 10 and the air flow driving unit 6, respectively, and circulates a high-temperature air flow by being driven by the air flow driving unit 6.

The air inlet unit 32 is a duct, communicates with the air flow input unit 9, and is capable of introducing outside air into the purge chamber 10 through the air flow input unit 9. The intake unit 32 has an intake valve 38 for controlling the inflow of outside air.

The exhaust unit 33 is a duct, communicates with the airflow drive unit 6, and can exhaust a high-temperature airflow. The exhaust unit 33 has an exhaust valve 39 for controlling the discharge of the high-temperature air flow.

In the present embodiment, the return valve 37, the intake valve 38, and the exhaust valve 39 are all electrically controlled valves.

In the present embodiment, the air flow driving unit 6, the air flow returning unit 7, the heating unit 8, the air flow input unit 9, the purge chamber 10, and the air flow output unit 11 constitute a circulation passage for circulating the air flow therein.

The processing temperature sensor 40 is a temperature sensor, is provided in the air flow output unit 11, and can sense the temperature of the high-temperature air flow entering the cleaning chamber 10 as a processing temperature.

The first auxiliary temperature sensor 41 is a temperature sensor, is disposed in the cleaning chamber 10 and near the airflow output unit 11, and is capable of sensing the temperature of the airflow passing through the particulate filter as a first auxiliary temperature.

The second auxiliary temperature sensor 42 is a temperature sensor provided in the airflow output unit 11 and is capable of sensing the temperature of the airflow passing through the particulate filter as a second auxiliary temperature.

Fig. 6 is a block diagram of a server according to an embodiment of the invention.

As shown in fig. 6, the server 102 includes a theoretical heating curve storage unit 51, a historical heating curve storage unit 52, a heating curve acquisition unit 53, a curve update unit 54, a service-side communication unit 55, and a service-side control unit 56 for controlling the above-described respective units.

The theoretical heating curve storage unit 51 stores a predetermined theoretical heating processing curve.

FIG. 7 is a schematic diagram of a theoretical heat treatment profile in accordance with one embodiment of the present invention.

As shown in fig. 7, the theoretical heating processing curve includes a temperature-up phase, a high-temperature maintaining phase, a first temperature-down phase, and a second temperature-down phase.

The temperature-raising stage comprises a first temperature-raising sub-stage, a stabilizing sub-stage and a second temperature-raising sub-stage.

The initial temperature in the first temperature-raising sub-stage is T0, after the heating is carried out for the preheating time T1, the temperature is raised to the preheating temperature T1, and then the steady sub-stage is started; in the stationary sub-stage, the temperature is kept at the preheating temperature T1 until the stationary time T2 elapses, and then the second temperature rise sub-stage is entered; in the second temperature-raising sub-stage, the temperature is raised from the preheating temperature T1 to the cleaning temperature T2 through the temperature-raising time T3, and the high-temperature maintaining stage is entered.

Wherein the sum of the preheating time T1, the settling time T2 and the heating time T3 is a first preset time, the first preset time is 10min-20min, the preheating time T1 is 1min-5min, the settling time T2 is 3min-8min, the initial temperature T0 is 25-100 ℃, the preheating temperature T1 is 250-350 ℃, and the cleaning temperature T2 is 550-700 ℃.

In the first embodiment, preferably, the preheating time T1 is 3min, the settling time T2 is 5min, the temperature-rising time T3 is 7min, the starting temperature T0 is room temperature, the preheating temperature T1 is 300 ℃, and the cleaning temperature T2 is 600 ℃.

During the high temperature maintaining period, the temperature is kept at the cleaning temperature T2 (i.e. the temperature maintained by the high temperature air flow during the high temperature maintaining period), and after the cleaning time T4 (i.e. the duration of the high temperature maintaining period) has elapsed, the first temperature reduction period is entered.

The cleaning time t4 is 10min to 20min, preferably 15min in the first embodiment.

In the first temperature reduction stage, after the pre-cooling time T5, the temperature is reduced from the cleaning temperature T2 to the pre-cooling temperature T3, and then the second temperature reduction stage is carried out.

Wherein the precooling time t5 is 3min-7min, preferably 5 min; the pre-cooling temperature T3 is 450 ℃ to 500 ℃ and preferably 480 ℃.

In the second supercooling phase, the temperature is decreased from the precooling temperature T3 to the removal temperature T4 over a cooling time T6, so that the particulate filter can be removed.

Wherein the cooling time t6 is 8min-15min, preferably 10 min; the taking-out temperature T4 is 25-100 ℃, and the taking-out temperature T4 in the first embodiment is room temperature.

In addition, when the automatic cleaning equipment for the particle filters cleans the first particle filter, the starting temperature T0 is room temperature; when the automatic cleaning equipment for the particle filter is continuously operated to clean the second particle filter, the initial temperature T0' is higher than the room temperature and lower than the precooling temperature.

The history heating curve storage unit 52 stores the model of each particulate filter and the history heating processing curve generated when the automatic particulate filter cleaning apparatus 11 cleans the particulate filter of the corresponding model.

FIG. 8 is a graph illustrating a historical heat treatment profile according to one embodiment of the present invention.

As shown in fig. 8, the historical heat treatment curve approximately coincides with the theoretical heat treatment curve, and is formed by the treatment temperature collected by the particulate filter cleaning apparatus 101 when the particulate filter was cleaned in the past.

When an operation manager puts the particulate filter into the cleaning chamber, the management terminal 103 allows the operation manager to input the model of the particulate filter to be cleaned and the device number of the particulate filter cleaning device 101 on which cleaning is to be performed, and transmits the input model and device number to the server 102.

The heating-curve acquiring unit 53 is configured to acquire a theoretical heating-processing curve from the theoretical heating-curve storage unit 51 when the service-side communication unit receives the model number and the device number, and acquire a corresponding historical heating-processing curve from the historical heating-curve storage unit 52 according to the model number.

Once the heating curve acquisition unit 53 completes the acquisition, the service-side communication unit 55 uses the acquired theoretical heating process curve and the acquired historical heating process curve as a cleaning start request, and transmits them to the corresponding automatic particulate filter cleaning apparatus 101 according to the received apparatus number.

When the automatic cleaning apparatus 101 for particulate filter completes cleaning, the control device 4 forms an actual heating process curve by the process temperature sensed by the process temperature sensor 40 according to time, and sends the actual heating process curve to the server 102.

The profile updating unit 54 is configured to, when the service-side communication unit receives the actual heat treatment profile, take the actual heat treatment profile as a history heat treatment profile and update the history heat treatment profile into the history heat treatment profile storage unit 52 in correspondence with the received model.

The control device 4 is configured to control the particulate filter cleaning device 3 to start cleaning the particulate filter when receiving the cleaning start request.

As shown in fig. 5, the control device 4 has a timing unit 61, a current target temperature acquisition unit 62, a temperature comparison unit 63, an actual temperature acquisition unit 64, a temperature change prediction unit 65, a temperature increase phase end determination unit 66, a high temperature maintenance phase end determination unit 67, a first temperature decrease phase end determination unit 68, a second temperature decrease phase end determination unit 69, an auxiliary temperature mean value calculation unit 70, a temperature difference value determination unit 71, an alarm determination unit 72, a control side communication unit 73, and a control unit 74.

The control unit 74 is used to control the operation of each unit in the control device, and to control the heating unit 8, the blower 13, the return valve 37, the intake valve 38, and the exhaust valve 39 of the automatic particulate filter cleaning device 3. This control unit 74 includes a reflux valve control unit 741, an intake valve control unit 742, an exhaust valve control unit 743, a heating control unit 744, and a drive control unit 745.

Next, the respective units in the control device 4 will be described by taking the automatic cleaning process of the automatic particulate filter cleaning apparatus as an example.

Upon the control-side communication unit 70 receiving the cleaning start request transmitted from the server 102, the automatic particulate filter cleaning device 3 starts cleaning, and at this time, the control unit 74 controls the timing unit 61 to start timing so as to obtain the current processing time in real time.

The current target temperature acquisition unit 62 acquires a temperature corresponding to the current processing time on the theoretical heat processing curve as a current target temperature according to the current processing time.

The temperature comparing unit 63 compares the current processing temperature and the current target temperature to obtain a comparison result. In this embodiment, the comparison result indicates that the current processing temperature is higher than the current target temperature or the current processing temperature is lower than the current target temperature.

The actual temperature acquisition unit 64 acquires the temperature at the next time on the history heat treatment curve as the subsequent actual temperature according to the current treatment time.

The temperature change prediction unit 65 predicts an actual temperature change rate of the air flow based on the comparison result and the subsequent actual temperature.

In this embodiment, the actual temperature change rate is a change rate of a subsequent actual temperature on a historical heating processing curve within a period of time after the current processing time.

Next, the control unit 74 acquires the process temperature sensed by the process temperature sensor 40 in real time as a current process temperature, and controls the operating states of the intake valve 38, the return valve 37, the exhaust valve 39, the heating unit 8, and the blower 13 based on the current process temperature, the current target temperature, and the subsequent actual temperature so that the actual heat-treatment curve formed by each current process temperature conforms to the predetermined heat-treatment curve. Specifically, the method comprises the following steps:

before the first temperature-raising sub-stage (i.e., before the timing unit 61 starts timing), the reflux valve control unit 741 controls the reflux valve 37 to open, the exhaust valve control unit 743 controls the exhaust valve 39 to close, and the drive control unit 745 controls the blower 13 in the air flow driving unit 6 to start operating and maintain a certain power, so that the air flow can flow from the driving duct 14 to the air flow reflux unit 7, and then sequentially flows through the heating unit 8, the air flow input unit 9, the cleaning chamber 10, the air flow output unit 11, and the air flow driving unit 6 to form a circulation flow.

Meanwhile, the heating control portion 744 controls the heating unit 8 to start operating, and the intake valve control portion 742 controls the intake valve 38 to close, so as to stop the introduction of the external air, and further to enable the high-temperature air flow to be heated by the heating unit 8 continuously in the circulating flow to form the high-temperature air flow.

Next, the control unit 74 controls the temperature raising stage end judgment unit 66 to sequentially judge whether the current processing time reaches the end time of the first temperature raising sub-stage, whether the end time of the plateau sub-stage, and whether the end time of the second temperature raising sub-stage.

When the temperature-raising-stage end judgment unit 66 judges that the current processing time reaches the end time of the first temperature-raising sub-stage, the particulate filter cleaning process enters the smoothing sub-stage from the first temperature-raising sub-stage, and the intake valve control section 742 controls the intake valve 38 to increase the opening degree so that the current processing temperature is maintained at the warm-up temperature T1.

When the temperature-raising-stage end judgment unit 66 judges that the current processing time reaches the end time of the stationary sub-stage, the particulate filter cleaning process enters the second temperature-raising sub-stage from the stationary sub-stage, and the intake valve control section 711 controls the intake valve 38 to decrease the opening degree, so that the cool air entering the cleaning chamber becomes less and the current processing temperature can be raised continuously.

When the temperature-raising-stage end judgment unit 66 judges that the current processing time reaches the end time of the second temperature-raising sub-stage, the particulate filter cleaning process enters the high-temperature maintenance stage from the temperature-raising stage, and the intake valve control portion 742 controls the intake valve 38 to increase the opening degree so that the current processing temperature is maintained at the cleaning temperature T2.

After entering the high temperature maintaining stage, the control unit 74 controls the high temperature maintaining stage ending judging unit 67 to judge whether the current processing time reaches the ending time of the high temperature maintaining stage.

When the high temperature maintenance phase end determination unit 67 determines yes, the particulate filter cleaning process enters the first temperature reduction phase from the high temperature maintenance phase, the heating control portion 744 controls the heating unit to stop the process, and the intake valve control portion 742 controls the intake valve 38 to increase the opening degree so that the current process temperature decreases.

In addition, in the high temperature maintaining stage, the control unit 74 obtains the temperature sensed by the first auxiliary temperature sensor 41 as a first current auxiliary temperature and obtains the temperature sensed by the second auxiliary temperature sensor 42 as a second current auxiliary temperature in real time.

Further, the control unit 74 controls the assist temperature mean value calculation unit 70 to calculate a mean value of the first current assist temperature and the second current assist temperature as the average assist temperature.

Then, the control unit 74 controls the temperature difference value judgment unit 71 to judge whether the difference between the current process temperature and the average assist temperature is less than a predetermined temperature difference threshold value.

When the temperature difference determination unit 71 determines that the temperature difference is equal to the first current auxiliary temperature, the control unit 74 obtains the next first current auxiliary temperature and the next second current auxiliary temperature, controls the auxiliary temperature mean value calculation unit 70 to perform calculation, and then controls the temperature difference determination unit 71 to further determine, and continuously cycle until the high temperature maintenance phase end determination unit 67 determines that the end time of the high temperature maintenance phase is reached.

When the temperature difference value determination unit 71 determines that the temperature difference value is not greater than the predetermined temperature, the drive control unit 715 controls the air flow driving unit to reduce the driving force, so that the high-temperature air flow rate is reduced, at this time, the particulate filter can be in full contact with the high-temperature air flow, the oil stains on the particulate filter and the particles are more fully combusted, and the cleaning efficiency is improved.

The first temperature-decreasing stage end judgment unit 68 judges whether or not the current processing time reaches the end time of the first temperature-decreasing stage.

After entering the first temperature-reducing stage, the control unit controls the first temperature-reducing stage end judgment unit 68 to judge whether the current processing time reaches the end time of the first temperature-reducing stage.

When the first temperature-lowering phase end determination unit 68 determines that the end time of the first temperature-lowering phase is reached, the particulate filter cleaning process enters the second temperature-lowering phase from the first temperature-lowering phase, the intake valve control portion 742 controls the intake valve 38 to be fully opened, and the exhaust valve control portion 743 controls the exhaust valve 39 to be opened, so that the high-temperature air flow in the cleaning chamber flows from the air flow driving unit to the exhaust unit and is then exhausted from the automatic particulate filter cleaning device, and further, the external air continuously flows through the particulate filter to realize rapid temperature lowering.

Meanwhile, the return valve control part 741 controls the return valve 37 to close, so that the high-temperature air in the air flow return unit 7 and the heating unit 8 stays in the two units and keeps a certain residual temperature, and the heating unit 8 can heat the air on the basis of the residual temperature in the next cleaning process.

When the temperature rise stage, the high temperature maintenance stage, and the first temperature decrease stage are determined as being negative by the temperature rise stage end determination means 66, the high temperature maintenance stage end determination means 67, and the first temperature decrease stage end determination means 68, the intake valve control section 742 performs feedback control of the intake valve 38 based on the comparison result, and performs compensation control of the intake valve 38 based on the actual temperature change rate. Namely:

if the comparison result shows that the current processing temperature is higher than the current target temperature, the intake valve control portion 742 controls the intake valve 38 to increase the opening degree by a predetermined variation value, so that the cool air introduced into the cleaning chamber 10 is increased and the current processing temperature is decreased.

If the comparison result shows that the current process temperature is lower than the current target temperature, the intake valve control portion 742 controls the intake valve 38 to decrease the opening degree by a predetermined variation value, so that the cool air introduced into the cleaning chamber 10 decreases and the current process temperature increases.

If the actual temperature change rate is higher than the target temperature change rate on the theoretical heat treatment curve and the difference between the two is higher than the predetermined change threshold, intake valve control portion 742 sets the predetermined change value to the first change value, reducing the rate of temperature rise of the high-temperature air flow.

If the actual temperature change rate is lower than the target temperature change rate and the difference between the two is higher than the predetermined change threshold, intake valve control portion 742 sets the predetermined change value to the second change value, increasing the rate of temperature rise of the high-temperature air flow. Wherein the first variation value is smaller than the second variation value.

By the above-described feedback control and compensation control, the actual heat treatment curve formed by the current treatment temperature at each timing can be made to strictly conform to the theoretical heat treatment curve only by the control of the intake valve 38.

The second temperature-decreasing stage end judgment unit 69 judges whether or not the current processing time reaches the end time of the second temperature-decreasing stage.

When second cool down phase end determination means 69 determines that the end time of the second cool down phase has not been reached, intake valve control portion 742 controls intake valve 38 to be kept in a fully open state at all times, and exhaust valve control portion 743 controls exhaust valve 39 to be kept in a fully open state at all times (at this time, return valve 37 is kept in a closed state).

When the second temperature-lowering phase end determination unit 69 determines that the end time of the second temperature-lowering phase is reached, the particulate filter cleaning is ended, and the control-side communication unit 73 sends a cleaning completion message to the management terminal 103 through the server 102, so that an operation manager is reminded to take out the cleaned particulate filter from the automatic particulate filter cleaning device 3.

The alarm determination unit 72 is configured to determine whether a difference between the current processing temperature and the theoretical processing temperature exceeds a predetermined alarm threshold. When the alarm determination unit 72 determines yes, the control-side communication unit 73 sends an abnormality alarm message and the equipment number of the current particulate filter cleaning apparatus 101 to the management terminal 103 via the server 102, thereby alerting an operation manager that there is an abnormality in the cleaning process.

In addition, in the first embodiment, when the automatic particulate filter cleaning apparatus 101 performs cleaning, the control unit 74 forms an actual heat treatment curve in real time according to the current treatment temperature and the historical treatment temperature and transmits the actual heat treatment curve and the current treatment temperature to the management terminal 103 for display in real time through the server 102.

The management terminal 103 is a smartphone and is held by an operation manager.

Fig. is a block diagram of a management terminal in an embodiment of the present invention.

As shown in the figure, the management terminal 103 includes a management-side screen storage section 81, a management-side input display section 82, a management-side communication section 83, and a management-side control section 83 for controlling the above-described sections.

The management-side screen storage unit 81 stores a model input screen, a processing state display screen, and an alarm screen.

The model input screen is used for inputting the model of the particulate filter to be cleaned and selecting the equipment number of the automatic cleaning equipment of the particulate filter which needs to be cleaned by the operation manager.

FIG. 9 is a diagram of a medium size input screen according to an embodiment of the present invention.

As shown in fig. 9, the model input screen 811 includes a model input section 812, a device number selection section 813, and a confirmation button 814. Wherein the model input section 812 has an input box for an operation manager to input the model of the particulate filter to be processed; the device number selection portion 813 displays the device numbers of all the particulate filter automatic cleaning devices 101 communicatively connected to the server 102 through a drop-down box, thereby allowing the operation manager to select one particulate filter automatic cleaning device 101 from which cleaning is to be performed.

Once the operation manager clicks the confirmation button 814, the management-side communication unit 83 transmits the input model number and the selected device number to the server 102.

The process status display screen is used to display the current status of the particulate filter automatic cleaning apparatus 101. In the first embodiment, the processing status display screen has a real-time status display portion and a completion prompt portion.

In the real-time status display section, the actual heat treatment curve and the current treatment temperature received from the automatic particulate filter cleaning apparatus 101 are displayed in real time, so that the operator can confirm the current heat cleaning status of the particulate filter.

The completion prompting section displays a message of "cleaning in progress" during cleaning performed by the automatic particulate filter cleaning apparatus 101, and displays a message of "cleaning completion" when the management-side communication unit 83 receives the cleaning completion message to prompt the operation manager that the particulate filter has been cleaned and can be taken out.

The alarm screen is used for displaying when the management-side communication unit 83 receives the abnormality alarm information, and displays the device number and the alarm prompt to notify the operator that the corresponding particulate filter cleaning device 101 has a problem in the cleaning process and needs human intervention.

The management-side input display unit 82 is used for displaying the screens, so that the operation manager can complete corresponding human-computer interaction through the screens.

The management-side communication unit 83 is used to exchange data between the management terminal 103 and the server 102.

FIG. 10 is a flow chart of a particulate filter cleaning step in accordance with an embodiment of the present invention.

As shown in fig. 10, when an operation manager puts a particulate filter to be cleaned into one automatic particulate filter cleaning apparatus 101 and starts the management terminal 103, the following particulate filter cleaning steps are started:

step S1, the management-side input display unit 82 displays a model input screen for the operation manager to input the model of the particulate filter to be cleaned and to select the apparatus number of the automatic particulate filter cleaning apparatus 101 to be subjected to cleaning, and then proceeds to step S2;

step S2, the management-side communication unit 83 sends the model number and the device number to the server 102, the heating-curve acquisition unit 53 acquires the theoretical heating-processing curve and the historical heating-processing curve corresponding to the model number, and then proceeds to step S3;

step S3, the service-side communication unit 55 correspondingly transmits the theoretical heat treatment curve and the historical heat treatment curve to the corresponding automatic particulate filter cleaning apparatus 101 according to the apparatus number, and then proceeds to step S4;

in step S4, the control unit 74 controls the respective units of the automatic particulate filter cleaning device 3 to initialize the cleaning state, that is, the intake valve control unit 711 controls the intake valve 38 to be closed, the return valve control unit 712 controls the return valve 37 to be opened, the exhaust valve control unit 713 controls the exhaust valve 39 to be closed, the drive control unit 715 controls the blower 13 in the air flow driving unit 6 to start operating, the heating control unit 714 controls the heating unit 8 to start operating, and the process then proceeds to step S5;

in step S5, the timer unit 61 starts timing, and then proceeds to step S6;

step S6, the control unit 74 obtains the current processing time through the timing unit 61, obtains the current processing temperature through the processing temperature sensor 40, controls the current target temperature obtaining unit 62 to obtain the temperature corresponding to the current processing time on the theoretical heating processing curve according to the current processing time as the current target temperature, and controls the actual temperature obtaining unit 64 to obtain the temperature at the next moment on the historical heating processing curve according to the current processing time as the subsequent actual temperature, and then proceeds to step S7;

step S7, the temperature comparing unit 63 compares the current processing temperature and the current target temperature to obtain a comparison result, and then the process goes to step S8;

step S8, the temperature change prediction unit 65 obtains the actual temperature change rate of the air flow according to the comparison result and the subsequent actual temperature prediction, and then proceeds to step S9;

in step S9, the first cooling stage end determining unit 69 determines whether the current processing time reaches the end time of the first cooling stage, if not, the process goes to step S10, and if so, the process goes to step S12;

in step S10, intake valve control unit 742 sets a predetermined variation value based on the difference between the actual temperature variation rate and the target temperature variation rate on the theoretical heat treatment curve, and then proceeds to step S11;

in step S11, the intake valve controller 742 controls the intake valve 38 to increase or decrease the opening degree by a predetermined variation value based on the comparison result, and then the process proceeds to step S6;

in step S12, intake valve control unit 742 controls intake valve 38 to fully open, exhaust valve control unit 743 controls exhaust valve 39 to fully open, and return valve control unit 741 controls return valve 37 to close, and then the process proceeds to step S13;

step S13, the second cooling stage ending determination unit determines whether the current processing time reaches the ending time of the second cooling stage, and proceeds to step S14 until the determination is yes;

in step S14, the control-side communication unit 73 sends a cleaning completion message to the management terminal 103 via the server 102, reminds the operation manager of the possibility of taking out the cleaned particulate filter from the automatic particulate filter cleaning device 3, and then enters an end state.

In the above process, before the current processing time reaches the end time of the first temperature decrease stage (i.e., the current processing time is in the temperature increase stage, the high temperature maintaining stage, and the first temperature decrease stage of the theoretical heating processing curve), the intake valve controller 742 performs feedback control and compensation control on the intake valve 38 to make the current processing temperature conform to the theoretical heating processing curve.

Example one action and Effect

According to the automatic cleaning system for the particulate filter provided by the first embodiment of the present invention, the server and the particulate filter cleaning device are provided, the server stores therein a theoretical heat treatment curve and a historical heat treatment curve generated by the particulate filter cleaning device when the particulate filter cleaning device cleans the particulate filter in the past, and when the particulate filter cleaning device performs cleaning, the control device performs feedback control on the heating unit, the air flow driving unit, and the air intake valve of the particulate filter cleaning device according to the treatment temperature of the air flow entering the particulate filter and the theoretical heat treatment curve, so that the treatment temperature can be made to conform to the theoretical heat treatment curve, and it is ensured that the particulate filter can be quickly cleaned in a short time. Still because controlling means still can carry out compensation control to heating unit, air current drive unit and admission valve according to historical heat treatment curve, consequently can further make the processing temperature rise temperature and lower the temperature strictly according to theoretical heat treatment curve to prevent that the processing temperature from suddenly rising and suddenly falling and influencing the quality of particulate filter, can guarantee to have quick, effectual cleaning performance, can also wash particulate filter harmlessly.

In the first embodiment, the air conditioner further includes a temperature comparing unit that compares the current processing temperature and the current target temperature to obtain a comparison result, and a temperature change predicting unit that predicts an actual temperature change rate of the air flow based on the comparison result and the subsequent actual temperature, so that the intake valve controlling unit may control the opening degree of the intake valve based on the comparison result and the actual temperature change rate, so that external air (relatively low-temperature air) may be mixed into the high-temperature air flow at different ratios, and the temperature change of the external air (relatively low-temperature air) may conform to a predetermined heating curve.

In the first embodiment, the first auxiliary temperature sensor and the second auxiliary temperature sensor are provided, so that the temperature of the air stream passing through the particulate filter can be sensed, and whether the driving force of the blower in the air stream driving unit needs to be controlled to be weakened or not is determined according to the difference between the average value of the temperatures of the two air streams and the current processing temperature, so that the problem that the particulate filter cannot well absorb the heat energy in the temperature-sensitive air stream due to too fast flow rate of the air stream can be avoided, and the cleaning process of the particulate filter has higher efficiency.

In the first embodiment, since the model input unit and the heating curve determination unit can determine the corresponding predetermined heating process curve according to the model of the particulate filter to be cleaned, the method can be applied to different models of particulate filters.

In the first embodiment, since the display unit displays the current treatment temperature and the predetermined heat treatment curve in real time, the operator can observe the cleaning stage of the cleaning filter and the treatment temperature in real time, and can take emergency measures if an abnormal situation is found.

< example two >

For convenience of expression, in the second embodiment, the same reference numerals are given to the same structures as those in the first embodiment, and the same descriptions are omitted.

In the first embodiment, in the temperature raising stage, the high temperature maintaining stage and the first temperature lowering stage, the opening degree of the intake valve is controlled by the intake valve control unit only, so that the current processing temperature is matched with the current target temperature on the theoretical temperature processing curve. Compared with the above, the second embodiment is different in that: in the temperature rise stage and the high temperature maintenance stage, the power change of the heating unit is controlled only by the heating control part, so that the current processing temperature conforms to the current target temperature.

Fig. 11 is a functional block diagram of an automatic cleaning device and a control device for a particulate filter according to a second embodiment of the present invention.

As shown in fig. 11, the control unit 74 'of the control device 4' has an intake valve control section 742 'and a heating control section 744' having different control functions from those of the first embodiment. Specifically, the method comprises the following steps:

in the temperature rise stage and the high temperature maintenance stage in which the current processing time is in the theoretical heating processing curve, when the temperature rise stage end determination unit 66 and the high temperature maintenance stage end determination unit 67 determine that the current processing time is not in the theoretical heating processing curve, the heating control section 744' performs feedback control on the heating unit 8 according to the comparison result, and performs compensation control on the heating unit 8 according to the actual temperature change rate. Namely:

if the comparison result is that the current processing temperature is higher than the current target temperature, the heating control part 744' controls the heating unit 8 to decrease the power according to the predetermined variation value, so that the current processing temperature is decreased.

If the comparison result is that the current process temperature is lower than the current target temperature, the heating control part 744' controls the heating unit 8 to increase the power according to a predetermined variation value, so that the current process temperature is increased.

If the actual temperature change rate is higher than the target temperature change rate on the theoretical heat treatment curve and the difference between the two is higher than the predetermined change threshold, the heating control portion 744' sets the predetermined change value as the first change value, and decreases the rate of temperature rise of the high-temperature air flow.

If the actual temperature change rate is lower than the target temperature change rate and the difference between the two is higher than the predetermined change threshold, the heating control portion 744' sets the predetermined change value as the second change value, increasing the rate of temperature rise of the high-temperature air flow. Wherein the first variation value is smaller than the second variation value.

By the above-described feedback control and compensation control, the actual heat treatment curve formed by the current treatment temperature at each time can be made to strictly conform to the theoretical heat treatment curve only by the control of the heating unit 8.

In the above-described warm-up phase and high-temperature maintenance phase, the intake valve controller 742' always controls the intake valve 38 to be closed. In the second embodiment, when the current processing time is in the first temperature-reducing stage, the heating control portion 744 'controls the heating unit 8 to be turned off, and the intake valve control portion 742' performs feedback control and compensation control on the intake valve.

FIG. 12 is a flow chart of the step of cleaning the particulate filter according to the second embodiment of the present invention.

As shown in fig. 12, the difference between the cleaning step of the second embodiment and the first embodiment is that there is an additional temperature control step between step S8 and step S9, namely:

after the step S8 is executed, the process proceeds to a step S15-2;

in step S15-2, the high temperature maintenance stage end determination unit 67 determines whether the current processing time reaches the end time of the high temperature maintenance stage, if not, the process proceeds to step S16-2, and if so, the process proceeds to step S9;

step S16-2, the heating control portion 744' sets a predetermined variation value according to the difference between the actual temperature variation rate and the target temperature variation rate on the theoretical heating processing curve, and then proceeds to step S17-2;

in step S17-2, the heating control part 744' controls the heating unit 8 to increase or decrease the power by a predetermined variation value according to the comparison result, and then proceeds to step S6.

In the above process, before the current processing time reaches the end time of the high temperature maintaining stage (i.e. the current processing time is in the temperature increasing stage and the high temperature maintaining stage of the theoretical heating processing curve), the heating control portion 744' performs feedback control and compensation control on the heating unit 8 to make the current processing temperature conform to the theoretical heating processing curve. After entering the first temperature-lowering stage, the heating control portion 744 'controls the heating unit 8 to be turned off, and the intake valve control portion 742' performs feedback control and compensation control on the intake valve 38 to make the current processing temperature conform to the theoretical heating processing curve.

Example two actions and effects

On the basis of the same technical effects as those of the first embodiment, in the second embodiment, the heating control unit controls the power of the heating unit according to the comparison result and the actual temperature change rate, so that only the heating unit is controlled to make the current processing temperature conform to the theoretical heating processing curve.

< example three >

For convenience of expression, in the third embodiment, the same reference numerals are given to the same structures as those in the first embodiment, and the same descriptions are omitted.

In the first embodiment, the intake valve controller 742 controls the opening degree of the intake valve only during the temperature raising stage, the high temperature maintaining stage, and the first temperature lowering stage, so that the current processing temperature matches the current target temperature on the theoretical temperature processing curve. In contrast, the third embodiment is different in that: in the temperature rising stage, the high temperature maintaining stage and the first temperature lowering stage, the power change of the air blower is controlled by the driving control part, and the current processing temperature is matched with the current target temperature by matching with the air inlet valve control part.

Fig. 13 is a functional block diagram of an automatic cleaning device and a control device for a particulate filter according to a third embodiment of the present invention.

As shown in fig. 13, the control unit 74 "of the control device 4" includes an intake valve control unit 742 "and a drive control unit 745" having different control functions from those of the first embodiment. Specifically, the method comprises the following steps:

when the temperature raising stage end determination means 66, the high temperature maintaining stage end determination means 67, and the first temperature lowering stage end determination means 68 determine that the current processing time is in the temperature raising stage, the high temperature maintaining stage, and the first temperature lowering stage of the theoretical heating processing curve, the intake valve control section 742 ″ and the drive control section 745 ″ perform feedback control of the intake valve 38 and the blower 13, respectively, based on the comparison result, and perform compensation control of the intake valve 38 and the blower 13, respectively, based on the actual temperature change rate. Namely:

if the comparison result shows that the current process temperature is higher than the current target temperature, the intake valve control unit 742 ″ controls the intake valve 38 to increase the degree of opening by a predetermined variation value, and the drive control unit 745 ″ controls the blower 13 to increase the power by a predetermined variation value, thereby lowering the current process temperature.

If the comparison result shows that the current process temperature is lower than the current target temperature, the intake valve control unit 742 ″ controls the intake valve 38 to decrease the opening degree by a predetermined variation value, and the drive control unit 745 ″ controls the blower 13 to decrease the power by a predetermined variation value, thereby increasing the current process temperature.

If the actual temperature change rate is higher than the target temperature change rate on the theoretical heat treatment curve and the difference between the two is higher than the predetermined change threshold, intake valve control portion 742 "and drive control portion 745" set the respective predetermined change values to the first change values, respectively, and decrease the rate of temperature rise of the high-temperature air flow.

If the actual temperature change rate is lower than the target temperature change rate and the difference between the two is higher than the predetermined change threshold, intake valve control portion 742 "and drive control portion 745" set the respective predetermined change values to the second change values, respectively, and increase the temperature increase rate of the high-temperature air flow. Wherein the first variation value is smaller than the second variation value.

By the above-described feedback control and compensation control, the actual heat treatment curve formed by the current treatment temperature at each timing can be made to strictly conform to the theoretical heat treatment curve by the combined control of the intake valve 38 and the blower 13.

FIG. 14 is a flow chart of the cleaning step of the particulate filter in the third embodiment of the present invention.

As shown in fig. 14, the difference between the cleaning step of the particulate filter in the third embodiment and the cleaning step of the particulate filter in the first embodiment is that the step S10 is different from the step S11, and the steps S10-3 and S11-3 in the third embodiment are as follows:

after the step S9 is executed, the flow proceeds to a step S10-3;

in step S10-3, the intake valve control section 742 ″ and the drive control section 745 ″ set a predetermined variation value based on the difference between the actual temperature variation rate and the target temperature variation rate on the theoretical heat treatment curve, and then proceed to step S11-3;

in step S11-3, the intake valve controller 742 controls the intake valve 38 to increase or decrease the degree of opening by a predetermined variation value based on the comparison result, and the drive controller 745' ″ controls the blower 13 to increase or decrease the degree of opening by a predetermined variation value based on the comparison result, and the process proceeds to step S6.

Example three actions and effects

In the third embodiment, the opening degree of the intake valve and the power of the blower are controlled by the intake valve control unit and the driving control unit according to the comparison result and the actual temperature change rate, respectively, so that the current processing temperature conforms to the theoretical heating processing curve.

< example four >

For convenience of expression, in the fourth embodiment, the same components as those in the first embodiment are given the same reference numerals, and the same description is omitted.

In the first embodiment, in the temperature raising stage, the high temperature maintaining stage and the first temperature lowering stage, the opening degree of the intake valve is controlled by the intake valve control unit only, so that the current processing temperature is matched with the current target temperature on the theoretical temperature processing curve. In contrast, the fourth embodiment is different in that: in the temperature rising stage, the high temperature maintaining stage and the first temperature lowering stage, the power change of the blower is controlled by the driving control part, the power change of the heating unit is controlled by the heating control part, and the current processing temperature is matched with the current target temperature by the cooperation of the driving control part, the heating control part and the air inlet valve control part.

Fig. 15 is a functional block diagram of an automatic cleaning device and a control device for a particulate filter according to a fourth embodiment of the present invention.

As shown in fig. 15, the control unit 74 "' of the control device 4" ' has an intake valve control part 742 "', a heating control part 744" ' and a drive control part 745 "' which have different control functions from those of the first embodiment. Specifically, the method comprises the following steps:

in the temperature rise stage, the high temperature maintenance stage, and the first temperature reduction stage in which the current processing time is in the theoretical heating processing curve, when the temperature rise stage end determination unit 66, the high temperature maintenance stage end determination unit 67, and the first temperature reduction stage end determination unit 68 determine that the current processing time is not in the theoretical heating processing curve, the intake valve control section 742 ' ", the heating control section 744 '", and the drive control section 745 ' "respectively perform feedback control on the intake valve 38, the heating unit 8, and the blower 13 according to the comparison result, and perform compensation control on the intake valve 38, the heating unit 8, and the blower 13 according to the actual temperature change rate. Namely:

if the comparison result shows that the current processing temperature is higher than the current target temperature, the intake valve control section 742 ' ″ controls the intake valve 38 to increase the opening degree according to the predetermined variation value, the heating control section 744 ' ″ controls the heating unit 8 to decrease the power according to the predetermined variation value, and the drive control section 745 ' ″ controls the blower 13 to increase the power according to the predetermined variation value, so that the current processing temperature is decreased.

If the comparison result shows that the current processing temperature is lower than the current target temperature, the intake valve control part 742 ' ″ controls the intake valve 38 to decrease the opening degree according to the predetermined variation value, the heating control part 744 ' ″ controls the heating unit 8 to increase the power according to the predetermined variation value, and the drive control part 745 ' ″ controls the blower 13 to decrease the power according to the predetermined variation value, so that the current processing temperature is increased.

If the actual temperature change rate is higher than the target temperature change rate on the theoretical heating processing curve and the difference between the actual temperature change rate and the target temperature change rate is higher than the predetermined change threshold, the intake valve control portion 742 ' ″, the heating control portion 744 ' ″ and the driving control portion 745 ' ″ respectively set the respective predetermined change values as first change values, and the temperature rise rate of the high-temperature air flow is reduced.

If the actual temperature change rate is lower than the target temperature change rate and the difference between the two is higher than the predetermined change threshold, the intake valve control portion 742 ' ", the heating control portion 744 '" and the driving control portion 745 ' "respectively set the respective predetermined change values to second change values, increasing the temperature increase rate of the high-temperature air flow. Wherein the first variation value is smaller than the second variation value.

By the above-described feedback control and compensation control, the actual heat treatment curve formed by the current treatment temperature at each time can be made to strictly conform to the theoretical heat treatment curve by controlling the heating unit 8, the blower 13, and the intake valve 38.

FIG. 16 is a flow chart of a cleaning step of a particulate filter according to a fourth embodiment of the present invention.

As shown in fig. 16, the difference between the cleaning step of the particulate filter in the fourth embodiment and the cleaning step of the particulate filter in the first embodiment is that the step S10 is different from the step S11, and the steps S10-4 and S11-4 in the third embodiment are as follows:

after the step S9 is executed, the flow goes to a step S10-4;

step S10-4, the intake valve control part 742 ' ", the heating control part 744 '" and the drive control part 745 ' "setting a predetermined change value according to a difference between the actual temperature change rate and the target temperature change rate on the theoretical heat treatment curve, and then proceeding to step S11-3;

in step S11-4, the intake valve control part 742 ' ″ controls the intake valve 38 to increase or decrease the opening degree by a predetermined variation value according to the comparison result, the heating control part 744 ' ″ controls the heating unit 8 to increase or decrease the opening degree by a predetermined variation value according to the comparison result, the drive control part 745 ' ″ controls the blower 13 to increase or decrease the opening degree by a predetermined variation value according to the comparison result, and the process proceeds to step S6.

Example four actions and effects

In the fourth embodiment, the opening degree of the intake valve, the power of the heating unit and the power of the blower are controlled by the intake valve control unit, the heating control unit and the driving control unit according to the comparison result and the actual temperature change rate, so that the current processing temperature conforms to the theoretical heating processing curve.

< modification example >

The difference between this modification and the first embodiment is that the temperature rise stage of the theoretical heat treatment curve is different, specifically:

As shown in fig. 17, in the temperature rising stage of the theoretical heating treatment curve, the air flow is continuously raised from the initial temperature T0(T0 is room temperature) to the cleaning temperature T2(T2 is 600 ℃) in accordance with a predetermined temperature rising curve for a first predetermined time T1(T1 is 15min), and the temperature rising rate of the temperature rising curve is gradually decreased.

The high temperature maintaining stage, the first temperature decreasing stage and the second temperature decreasing stage of the theoretical heating processing curve are the same as those of the first embodiment, and are not described herein again.

Effects and effects of the modified examples

On the basis of the same technical effect as that of the first embodiment, in the present modification, since the air flow is continuously heated from the initial temperature room temperature to the cleaning temperature 600 ℃ within the first predetermined time 15min according to the predetermined temperature rising curve in the temperature rising stage, and the temperature rising rate of the temperature rising curve is gradually decreased. Thus, the temperature of the air stream can be brought to the cleaning temperature more quickly than in the first embodiment, further reducing the time taken for the cleaning process.

The above-mentioned first, second, third, fourth and modified examples are only used to illustrate the specific implementation manner of the present invention, and the present invention is not limited to the description scope of the above-mentioned embodiments.

In the first embodiment, the temperature comparing unit and the temperature change predicting unit perform the comparison of the temperatures and the prediction of the temperature change rate in the control device. Alternatively, the temperature comparing unit and the temperature change predicting unit may be provided in the server, so that the comparison of the temperature and the prediction of the temperature change rate are performed in the server, and the output comparison result and the actual temperature change rate are transmitted to the control device through the service-side communication unit to be controlled correspondingly.

In the first, second, third and fourth embodiments, the first variation value and the second variation value (i.e. the predetermined variation value) can be adjusted and set according to the actual situation.

In the first embodiment, the current processing temperature is made to conform to the theoretical heating processing curve by the feedback control and compensation control of the intake valve, in the second embodiment, the feedback control and compensation control of the heating unit are performed, in the third embodiment, the feedback control and compensation control of the intake valve and the blower are performed in combination, and in the fourth embodiment, the feedback control and compensation control of the intake valve, the heating unit and the blower are performed in combination. In other aspects of the present invention, the feedback control and the compensation control can be performed based on other combinations so that the current processing temperature strictly conforms to the theoretical heating processing curve, for example, the blower and the heating unit are cooperatively controlled.

In the modification described above, the particle filter is heated and cleaned using the theoretical heating treatment curve different from that of the first embodiment, but in other embodiments of the present invention, the theoretical heating treatment curve in the modification may be used in the second, third, fourth, and other embodiments, and the technical effect of further reducing the time taken for the cleaning process in the modification can be achieved.

Claims

1. An automatic cleaning system for particulate filters of different specifications, comprising:

at least one automatic cleaning device for the particle filter;

a management terminal held by an operation manager; and

a server in communication connection with the automatic particulate filter cleaning device and the management terminal, respectively,

wherein the automatic cleaning equipment for the particle filter comprises a particle filter cleaning device and a control device,

the particulate filter cleaning apparatus includes:

a wash chamber for housing the particulate filter;

a heating unit for heating the air flow;

an air flow driving unit for providing a driving force for the flow of the air;

the air inlet unit is used for introducing external unit air into the cleaning chamber and is provided with an air inlet valve used for controlling the introduction of the external unit air; and

a process temperature sensing unit for sensing a temperature of the air flow entering the purge chamber as a process temperature,

the server is provided with a theoretical heating curve storage unit, a historical heating curve storage unit, a heating curve acquisition unit and a service side communication unit,

the theoretical heating curve storage unit stores a predetermined theoretical heating processing curve,

the historical heating curve storage unit stores a historical heating processing curve generated when the automatic cleaning equipment for the particle filter cleans the particle filter,

the heating curve acquisition unit acquires the theoretical heating processing curve and the historical heating processing curve and sends the theoretical heating processing curve and the historical heating processing curve to the control device through the service side communication unit,

the control device feedback-controls the heating unit, the air flow driving unit, and the intake valve based on the treatment temperature at the present time and the theoretical heat treatment curve, and performs compensation control based on the feedback control on the basis of a temperature change of the historical heat treatment curve at a subsequent time, so that the treatment temperature conforms to the predetermined heat treatment curve.

2. The automatic particulate filter cleaning system according to claim 1, wherein:

wherein the particulate filter cleaning apparatus further includes an air flow input unit for inputting a high-temperature air flow, which is heated by the heating unit, into the cleaning chamber,

the process temperature sensing unit is disposed at the air flow input unit,

the control device is provided with a control unit, a timing unit, a current target temperature acquisition unit and a temperature comparison unit,

the control unit controls the timing unit to time when the particulate filter cleaning apparatus starts cleaning so as to obtain a current processing time in real time,

the current target temperature acquisition unit acquires a temperature corresponding to the current processing time on the theoretical heating processing curve according to the current processing time as a current target temperature,

the actual temperature acquisition unit acquires the temperature at the next moment on the historical heating processing curve according to the current processing time as a subsequent actual temperature,

the control unit acquires the processing temperatures from the processing temperature sensing unit in real time to be used as current processing temperatures respectively, controls the temperature comparison unit to compare the current processing temperatures with the current target temperature to obtain a comparison result, further controls the temperature change prediction unit to obtain the actual temperature change rate of the air flow according to the comparison result and the subsequent actual temperature prediction,

the control unit performs the feedback control of the operating state of at least one of the intake valve, the heating unit, and the air flow driving unit according to the comparison result, and performs the compensation control based on the feedback control according to the actual temperature change rate, so that an actual heat treatment curve formed by each of the current treatment temperatures conforms to the predetermined heat treatment curve.

3. The automatic particulate filter cleaning system according to claim 2, wherein:

wherein the control unit has an intake valve control portion,

the feedback control is as follows:

when the comparison result is that the current process temperature is higher than the current target temperature, the intake valve control portion controls the intake valve to increase the opening degree by a predetermined change value so that the current process temperature decreases,

when the comparison result is that the current process temperature is lower than the current target temperature, the intake valve control portion controls the intake valve to decrease the opening degree by a predetermined variation value so that the current process temperature is increased,

the compensation control is as follows:

the intake valve control portion sets the predetermined change value to a first change value when the actual temperature change rate is higher than a target temperature change rate on the theoretical heat treatment curve and a difference therebetween is higher than a predetermined change threshold,

the intake valve control portion sets the predetermined change value to a second change value when the actual temperature change rate is lower than the target temperature change rate and a difference therebetween is higher than the predetermined change threshold,

the first variation value is smaller than the second variation value.

4. The automatic particulate filter cleaning system according to claim 2, wherein:

wherein the control unit has a heating control part,

the feedback control is as follows:

when the comparison result is that the current processing temperature is higher than the current target temperature, the heating control part controls the heating unit to reduce power by a preset variation value, so that the current processing temperature is reduced,

when the comparison result is that the current processing temperature is lower than the current target temperature, the heating control part controls the heating unit to increase power by a predetermined variation value, so that the current processing temperature is increased,

the compensation control is as follows:

when the actual temperature change rate is higher than the target temperature change rate on the theoretical heat treatment curve and a difference therebetween is higher than a predetermined change threshold, the heating control portion sets the predetermined change value to a first change value,

the heating control portion sets the predetermined variation value to a second variation value when the actual temperature variation rate is lower than the target temperature variation rate and a difference therebetween is higher than the predetermined variation threshold,

the first variation value is smaller than the second variation value.

5. The automatic particulate filter cleaning system according to claim 2, wherein:

wherein the control unit has a drive control section,

the feedback control is as follows:

when the comparison result is that the current process temperature is higher than the current target temperature, the drive control portion controls the airflow drive unit predetermined variation value to increase the drive force so that the current process temperature is decreased,

when the comparison result is that the current process temperature is lower than the current target temperature, the drive control portion controls the airflow drive unit to decrease the drive force by a predetermined variation value so that the current process temperature is increased,

the compensation control is as follows:

when the actual temperature change rate is higher than the target temperature change rate on the theoretical heat treatment curve and a difference therebetween is higher than a predetermined change threshold, the drive control portion sets the predetermined change value to a first change value,

when the actual temperature change rate is lower than the target temperature change rate and a difference therebetween is higher than the predetermined change threshold, the drive control portion sets the predetermined change value to a second change value,

the first variation value is smaller than the second variation value.

6. The automatic particulate filter cleaning system according to claim 2, wherein:

wherein the particle filter cleaning device further comprises an auxiliary temperature sensing unit,

the control device is also provided with a temperature difference value judging unit,

the control unit is provided with a drive control part,

the particulate filter cleaning apparatus further includes an air flow output unit for outputting the high temperature air flow in the cleaning chamber,

the auxiliary temperature sensing unit is arranged in the cleaning chamber or on the high-temperature air flow output unit and is used for sensing the temperature of the high-temperature air flow flowing out of the cleaning chamber as an auxiliary temperature,

the control unit obtains the auxiliary temperature from the auxiliary temperature sensing unit as a current auxiliary temperature, controls the temperature difference value judging unit to judge whether the difference value between the current processing temperature and the current auxiliary temperature is less than a preset temperature difference threshold value,

the drive control unit controls the airflow drive unit to reduce the drive force when the temperature difference determination unit determines that the temperature difference is negative.

7. The automatic particulate filter cleaning system according to claim 2, wherein:

wherein the control device is also provided with a high temperature maintaining stage ending judging unit and a first cooling stage ending judging unit,

the particulate filter cleaning apparatus further includes:

an exhaust unit for exhausting the high temperature air stream, having an exhaust valve for controlling the exhaust of the high temperature air stream; and

an air flow returning unit that returns the high temperature air flow from the air flow output unit so that the high temperature air flow circulates,

the air flow returning unit has a return valve for controlling the return of the high temperature air flow,

the control unit has a heating control unit, an intake valve control unit, an exhaust valve control unit, and a reflux valve control unit,

the predetermined heat treatment curve at least comprises a high temperature maintaining stage, a first temperature reduction stage and a second temperature reduction stage,

the high temperature maintenance phase end judgment unit judges whether the current processing time reaches the end time of the high temperature maintenance phase,

when the high temperature maintaining stage ending judging unit judges that the temperature is higher than the preset temperature, the heating control part controls the heating unit to stop heating, the air inlet valve control part controls the air inlet valve to increase the opening degree,

the first cooling stage end judgment unit judges whether the current processing time reaches the end time of the first cooling stage,

when the first temperature reduction stage end judgment unit judges that the temperature is positive, the air inlet valve control part controls the air inlet valve to be opened completely, the exhaust valve control part controls the exhaust valve to be opened, the backflow valve control part controls the backflow valve to be closed,

the temperature of the high-temperature air flow maintained in the high-temperature maintaining stage is 550-700 ℃, and the duration of the high-temperature maintaining stage is 5-30 min.

8. The automatic particulate filter cleaning system according to claim 2, wherein:

wherein the control device is also provided with a historical heating curve output unit,

the server also has a storage updating unit that,

after the particulate filter is cleaned, the control unit further controls the historical heating curve output unit to send the actual heating processing curve as a historical heating processing curve to the server,

the storage updating unit updates the received historical heating processing curve to the historical heating curve storage unit.

9. The automatic particulate filter cleaning system according to claim 1, wherein:

wherein the automatic cleaning equipment for the particle filter is provided with a plurality of equipment numbers,

the historical heating profile storage unit stores historical heating processing profiles and corresponding models of the particulate filters,

the management terminal has a management-side screen storage unit, a management-side input display unit, and a management-side communication unit,

the management-side picture storage unit stores a model input picture,

the management side input display unit is used for displaying the model input picture and letting the operation manager input the model of the particle filter to be cleaned and the equipment number for selecting the automatic cleaning equipment of the particle filter which needs to be cleaned,

the management-side communication unit transmits the device number and the model number to the server upon confirmation of input by the operation manager,

the heating curve acquisition unit acquires the historical heating processing curve which is a historical heating processing curve corresponding to the received model,

and the service side communication unit sends the theoretical heat treatment curve and the historical heat treatment curve to corresponding automatic particle filter cleaning equipment according to the equipment number.

10. The automatic particulate filter cleaning system according to claim 1, wherein:

wherein the management terminal has a management side screen storage unit, a management side input display unit, and a management side communication unit,

the management-side picture storage unit stores a processing-state display picture,

the control device sends the processing temperature to the management terminal through the server in real time,

and the management side input display unit is used for displaying the processing state display picture and displaying an actual heating processing curve formed by the processing temperature for the operation manager to view.