Particle filter cleaning device and particle filter cleaning equipment

Abstract

The present invention relates to the field of particle filter cleaning, and in particular to a particle filter cleaning device and a particle filter cleaning equipment, wherein the particle filter cleaning device is used to clean particles deposited in the particle filter by means of a high-temperature air flow, and has the following characteristics, including: a cleaning chamber for placing the particle filter; a heating unit for heating the air flow; an air flow driving unit for providing a driving force for the air flow; an air flow input unit for inputting the high-temperature air flow formed after heating by the heating unit into the cleaning chamber; an air flow output unit for outputting the high-temperature air flow in the cleaning chamber; and an air flow reflux unit for refluxing the high-temperature air flow from the air flow output unit so that the high-temperature air flow circulates.

Description

Technical Field

[0001] The invention relates to the field of particle filter cleaning, and in particular to a particle filter cleaning device and a particle filter cleaning equipment. Background Art

[0002] The exhaust system of a diesel vehicle includes an exhaust pipe and a diesel particulate filter (DPF) disposed in the exhaust pipe. When the exhaust gas in the exhaust pipe passes through the DPF, the particles and oil in the exhaust gas are adsorbed and filtered by the DPF filter element. However, as the working time of the diesel vehicle exhaust system increases, the particles and oil inside the DPF filter element also accumulate, resulting in an increase in the vehicle's exhaust back pressure, an increase in the vehicle's fuel consumption, and a decrease in power. In addition, when the DPF filter element is severely clogged, the exhaust gas cannot be discharged.

[0003] The conventional solution to the above problem is to regularly remove the DPF from the exhaust system of the diesel vehicle and clean it (clean it) to restore it to its normal working level.

[0004] Among them, there are many ways to clean the DPF, and heating regeneration cleaning is usually used. The principle of heating regeneration cleaning is to burn and oxidize the adsorbed particulate matter inside the DPF through high-temperature heating, so as to achieve the cleaning purpose. Heating regeneration cleaning is usually achieved through a DPF heating furnace, which uses natural heat conduction for heating, and relies on the resistance wire coiled in the furnace cavity to heat the air and transfer heat to the DPF through thermal radiation. However, due to the poor thermal conductivity of the DPF material, on the one hand, it usually takes 2 to 3 hours to heat the internal temperature of the DPF to a cleaning temperature of about 600°C, the heating efficiency is too low, and the energy consumption is high; on the other hand, the internal DPF material is easily heated unevenly, resulting in poor cleaning effect. That is, the existing DPF heating furnace has high time cost, high energy consumption cost, and poor cleaning effect for DPF cleaning. Summary of the invention

[0005] The present invention is made to solve the above-mentioned problems, and its object is to provide a particle filter cleaning device and a particle filter cleaning equipment.

[0006] The present invention provides a particle filter cleaning device, which is used to clean particles deposited in the particle filter by means of a high-temperature air flow, and has the following characteristics: a cleaning chamber for placing the particle filter; a heating unit for heating the air flow; an air flow driving unit for providing a driving force for the air flow; an air flow input unit for inputting the high-temperature air flow formed after heating by the heating unit into the cleaning chamber; an air flow output unit for outputting the high-temperature air flow in the cleaning chamber; and an air flow reflux unit for refluxing the high-temperature air flow from the air flow output unit so that the high-temperature air flow circulates.

[0007] The particle filter cleaning device provided by the present invention may also have the following features: the air flow driving unit is arranged between the air flow output unit and the air flow return unit, and the heating unit is arranged between the air flow return unit and the air flow input unit.

[0008] The particle filter cleaning device provided by the present invention may also have such features, and also include: an air intake unit, used to introduce external air into the cleaning chamber, having an air intake valve for controlling the introduction of external air; and an exhaust unit, used to discharge the high-temperature air flow, having an exhaust valve for controlling the discharge of the high-temperature air flow.

[0009] The particle filter cleaning device provided by the present invention may also have the following feature: the air flow reflow unit has a reflow valve for controlling the reflow of the high-temperature air flow.

[0010] The particle filter cleaning device provided by the present invention may also have the following features: wherein the pipe of the high-temperature air flow input unit is connected to the lower side of the cleaning chamber, the pipe of the high-temperature air flow output unit is connected to the upper side of the cleaning chamber, and the heating unit is arranged below the cleaning chamber.

[0011] The particle filter cleaning device provided by the present invention may also have the following feature: a supporting portion matching the particle filter is provided at the bottom of the cleaning chamber, and the supporting portion is connected to the high-temperature air flow input unit.

[0012] The particle filter cleaning device provided by the present invention may also have the following features: wherein the supporting portion includes a supporting member, which is cylindrical and has a cone shape with a larger upper portion and a smaller lower portion, and the bottom of the supporting member is connected to the high-temperature air flow input unit.

[0013] The particle filter cleaning device provided by the present invention may also have the following features: wherein the cleaning chamber includes an insulation cavity and an insulation door installed on the insulation cavity, the insulation cavity and the insulation door both include a metal layer and an insulation layer arranged on the outside of the metal layer, the metal layer is provided with a plurality of through holes, and the pipes of the air flow driving unit, the air flow reflux unit, the high-temperature air flow input unit, and the high-temperature air flow output unit are all insulation pipes.

[0014] The particle filter cleaning device provided by the present invention may also have the following characteristics: the temperature of the high-temperature air flow is 550° C. to 700° C., and the cleaning time is 5 min to 30 min.

[0015] The present invention provides a particle filter cleaning device having the following characteristics, including: a cabinet; a particle filter cleaning device installed on the cabinet and used to clean particles deposited in the particle filter; and a control device for controlling the operation of the particle filter cleaning device, wherein the particle filter cleaning device is the above-mentioned particle filter cleaning device.

[0016] The particle filter cleaning device of the present invention can clean particle filters, such as diesel particulate filter (DPF), gasoline particulate filter (GPF), etc. In addition, the particle filter cleaning device can also clean other parts in the exhaust system of fuel vehicles that need to clean particulate matter regularly, such as oxidation catalytic converter (DOC), exhaust gas recirculation system (EGR), selective catalytic reduction system (SCR), etc.; and, only need to place these parts to be cleaned in the cleaning chamber of the device, ensure that the high-temperature air flow can pass through the inside of these parts, and then the cleaning can be achieved. In addition, when cleaning parts other than the particle filter, in order to achieve a better cleaning effect, it is also possible to choose to replace the supporting part in the particle filter cleaning device suitable for cleaning the particle filter with a supporting part that is compatible with the parts.

[0017] Functions and Effects of the Invention

[0018] The particle filter cleaning device involved in the present invention includes a cleaning chamber, a heating unit, an air flow driving unit, an air flow input unit, an air flow output unit and an air flow reflux unit, wherein the cleaning chamber can be used to place a particle filter, the heating unit can heat the air flow, the air flow driving unit can provide a driving force for the air flow to flow, the air flow input unit can input the high-temperature air flow formed after heating by the heating unit into the cleaning chamber, the air flow output unit can output the high-temperature air flow in the cleaning chamber, and the air flow reflux unit can reflux the high-temperature air flow from the air flow output unit to make the high-temperature air flow circulate, thereby utilizing the circulating high-temperature air flow to clean the particulate matter deposited in the particle filter placed in the cleaning chamber, and the high-temperature air flow directly transfers heat to the particulate matter in the particle filter, with high heat transfer efficiency, which can not only shorten the cleaning time and reduce the cleaning energy consumption, but also achieve a more thorough cleaning.

[0019] According to the particle filter cleaning equipment involved in the present invention, because it includes the above-mentioned particle filter cleaning device and the control device, the control device can control the operation of the particle filter cleaning device. Therefore, the equipment can not only automatically clean the particulate oil in the particle filter at one time, but also has a fast, efficient, energy-saving and thorough cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of a particle filter cleaning device in Embodiment 1 of the present invention;

[0021] Figure 2 is a schematic structural diagram of a particle filter cleaning device in Embodiment 1 of the present invention;

[0022] Figure 3 is a partial structural schematic diagram of a particle filter cleaning device in Embodiment 1 of the present invention;

[0023] Figure 4 is a schematic diagram of the three-dimensional structure of the heating unit in the first embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the end surface structure of the heating unit in the first embodiment;

[0025] Figure 6 is a schematic structural diagram of the supporting portion in the first embodiment;

[0026] Figure 7 is a schematic diagram of a state in which the supporting portion supports the DPF through the supporting bars in the first embodiment;

[0027] Figure 8 is a schematic structural diagram of the air intake unit in the first embodiment;

[0028] Fig. 9 is a schematic structural diagram of the linkage valve portion in the first embodiment;

[0029] Fig.10 is a schematic diagram of the working principle of the air flow circulation of the particle filter cleaning device in the first embodiment;

[0030] Fig.11 Schematic diagram of the working principle of the particle filter cleaning device for rapid cooling in the first embodiment;

[0031] Fig.12 is a schematic structural diagram of a particle filter cleaning device in Embodiment 2 of the present invention; and

[0032] Fig.13 It is a schematic diagram of the working principle of the particle filter cleaning device in the second embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments are combined with the accompanying drawings to specifically explain the particle filter cleaning device and particle filter cleaning equipment of the present invention.

[0034] <Example 1>

[0035] Embodiment 1 provides a particle filter cleaning device and a particle filter cleaning method.

[0036] Figure 1 It is a schematic diagram of the three-dimensional structure of the particle filter cleaning device in the first embodiment of the present invention.

[0037] like Figure 1 As shown, the particle filter cleaning device 1-100 in this embodiment includes a cabinet 1-10, a particle filter cleaning device 1-20 and a control device 1-90.

[0038] The cabinet 1-10 is a stainless steel rectangular cabinet, and four support feet 1-11 are fixed to the four corners of the bottom surface, so that the cabinet 1-10 has a certain distance from the ground to facilitate heat dissipation. The bottom and top surfaces of the cabinet 1-10 are provided with a plurality of through holes 1-12 for air circulation and heat dissipation. The control device 1-90 is installed on the cabinet 1-10 and is used to control the operation of the particle filter cleaning device 1-20.

[0039] Figure 2 It is a schematic structural diagram of a particle filter cleaning device in Embodiment 1 of the present invention.

[0040] like Figure 2As shown, the particle filter cleaning device 1-20 is used to clean the particles deposited in the particle filter through a high-temperature air flow, and is installed in a cabinet 1-10, and includes an air flow driving unit 1-21, a heat dissipation unit 1-22, an air flow reflux unit 1-23, a heating unit 1-24, an air flow input unit 1-25, a cleaning chamber 1-26, a supporting portion 1-27, an air flow output unit 1-28, an air intake unit 1-29 and an exhaust unit 1-30.

[0041] The air flow driving unit 1-21 has a driving motor 1-211, a blower 1-212, and a driving duct 1-213.

[0042] The driving motor 1-211 is installed on the top of the cabinet 1-10, and its part is exposed from the top surface of the cabinet 1-10, so as to facilitate heat dissipation. The blower 1-212 is connected to the output end of the driving motor 1-211, and has an air inlet 1-2121 and an air outlet 1-2122. The blower 1-212 can suck air from the air inlet 1-2121 under the drive of the driving motor 1-61, and discharge it from the air outlet 1-2122 after generating air flow. The driving duct 1-213 is connected to the air outlet 1-2122 of the blower 1-212, and the air flow is generated from the blower 1-212 and enters the driving duct 1-213.

[0043] Figure 3 It is a partial structural schematic diagram of the particle filter cleaning device in the first embodiment of the present invention.

[0044] like Figure 2 and Figure 3 As shown, the heat dissipation unit 1-22 is installed on the top of the cabinet 1-10, and is arranged corresponding to the air flow driving unit 1-21, and is used to cool the driving motor 1-211. The heat dissipation unit 1-22 can be, for example, a motor-driven fan, and its air outlet 1-221 is arranged toward the driving motor 1-61, so as to blow air to cool the driving motor 1-12.

[0045] like Figure 2 As shown, the air flow return unit 1-23 has a return pipe 1-231 and a return valve 1-232. The return pipe 1-231 is connected to the driving pipe 1-213, and the air flow enters the return pipe 1-231 through the driving pipe 1-213. The return valve 1-232 is set on the return pipe 1-231 to control whether the return pipe 1-231 is connected.

[0046] Figure 4 It is a schematic diagram of the three-dimensional structure of the heating unit in the first embodiment of the present invention.

[0047] like Figure 4As shown, the heating unit 1-24 is connected to the air flow return unit 1-23, and can heat the air flow delivered by the air flow return unit 1-23 to form a high-temperature air flow. The temperature of the high-temperature air flow is 550° C. to 700° C., preferably 600° C. The heating unit 1-24 includes a tubular housing 1-241, a ceramic column 1-242, and a plurality of electric heating wires 1-243.

[0048] Figure 5 It is a schematic diagram of the end surface structure of the heating unit in the first embodiment.

[0049] like Figure 4 and Figure 5 As shown, the tubular shell 1-241 is a high temperature resistant stainless steel shell with a length of 70 cm and an inner diameter of 21 cm. One end of the tubular shell 1-241 is connected to the air flow return unit 1-23, and the end is also provided with a wiring post 1-2411. The wiring post 1-2411 runs through the tubular shell 1-241 and is connected to an external power source for supplying power to the heating wire 1-243. The other end of the tubular shell 1-241 is connected to the air flow input unit 1-25. The outer surface of the tubular shell 1-241 is covered with a heat preservation layer (not shown in the figure), which can keep the tubular shell 1-241 warm.

[0050] The ceramic column 1-242 is installed in the tubular housing 1-241, and its length is 3 cm to 10 cm shorter than that of the tubular housing 1-241. A gap of 0.5 cm is formed between the ceramic column 1-242 and the tubular housing 1-241, and the gap is filled with thermal insulation material, which can not only play a role in thermal insulation, but also play a certain buffering role to prevent the ceramic column 1-242 from colliding with the tubular housing.

[0051] The ceramic column 1-242 includes a plurality of ceramic column parts that are adjacent to each other in sequence and connected by bolts. The ceramic column 1-242 has a plurality of through cavities 1-2421, and the extension direction of the through cavities 1-2421 is consistent with the length direction of the insulating column 18. The plurality of through cavities 1-2421 are distributed in two layers as an inner layer and an outer layer along the circumference of the ceramic column 1-242. In this embodiment, the number of through cavities 1-2421 is 18, and 9 through cavities 1-2421 are provided in the inner layer and the outer layer.

[0052] Multiple heating wires 1-243 are respectively installed in corresponding through-cavities 1-2421, so as to heat the air flowing through the through-cavities 1-2421 to form a high-temperature air flow. In this embodiment, the number of heating wires 1-243 is 9. Each heating wire is a spiral cylindrical and is distributed in a U-shape in two through-cavities 1-2421 distributed in pairs, one of the two through-cavities 1-2421 is located in one layer, and the other is located in another layer. The total power of multiple heating wires 1-243 is 27KW.

[0053] The air flow input unit 1-25 is a pipe, which is connected to the heating unit 1-24 and is used to deliver the high-temperature air flow generated by the heating unit 1-24 to the cleaning chamber 1-10. A temperature sensor is also provided in the pipe of the air flow input unit 1-25 to indicate the internal temperature of the DPF.

[0054] like Figure 2 As shown, the cleaning chamber 1-26 is a rectangular box, and the cleaning chamber 10 is located above the heating unit 1-24. The cleaning chamber 1-26 includes a heat preservation cavity 1-261 and a heat preservation door 1-262 rotatably mounted on the heat preservation cavity 1-261. In this embodiment, the heat preservation door 1-262 is connected to the heat preservation cavity 1-261 by a pivot.

[0055] The heat-insulating cavity 1-261 and the heat-insulating door 1-262 both include a metal layer and a heat-insulating layer disposed outside the metal layer, and a plurality of through holes 1-263 are disposed on the metal layer. The heat-insulating door 1-261 also has a protective shell (not shown in the figure) and a door handle 1-264, and the protective shell is disposed outside the heat-insulating layer of the heat-insulating door 1-262 to provide protection for the heat-insulating layer. The door handle 1-264 is disposed on the protective shell and is used to open or close the heat-insulating door 1-262. The bottom of the heat-insulating cavity 1-261 is connected to the pipe of the air flow input unit 1-25.

[0056] Figure 6 It is a structural schematic diagram of the supporting part in the first embodiment.

[0057] like Figure 6 The supporting portion 1-27 shown is arranged at the bottom of the heat preservation cavity 1-261, including a supporting member 1-271, a plurality of support bars 1-272 and a grille member 1-273.

[0058] The supporting member 1-271 is cylindrical and has a cone shape with a larger top and a smaller bottom. The bottom of the supporting member 1-271 is connected to the pipe of the air flow input unit 1-25. The diameter of the top opening of the supporting member 1-271 is 35 cm, and the diameter of the bottom opening is 12 cm. The supporting member 1-271 is horizontally arranged on the heat preservation cavity 1-261.

[0059] The number of support bars 1-272 is 6. Each support bar 1-272 is in a strip shape and has the same thickness of 5 mm. The extension direction of the support bar 1-272 is consistent with the generatrix direction of the supporting member 1-271, and the support bar 1-272 opens from the top of the supporting member 1-271 along the bottom of the supporting member 1-271.

[0060] Figure 7 It is a schematic diagram of the state in which the supporting part supports the DPF through the support bars in the first embodiment.

[0061] like Figure 7 As shown, when cleaning the DPF, the DPF is placed vertically on the support bars 1-272 so that one end surface of the DPF contacts all the support bars 1-272 at the same time, thereby being stably supported by the support bars 1-272. The end surfaces of different models of DPFs have different diameters and can be placed at different heights of the support bars 1-272.

[0062] The grille member 1-273 is horizontally arranged on the bottom opening of the supporting member 1-271, and is used to place a special model of DPF (the model is particularly small, and the diameter of its end face is smaller than the diameter of the bottom opening of the supporting member 1-271).

[0063] When cleaning the DPF, the DPF is placed in the cleaning chamber 10 and on the supporting part 1-27. After the high-temperature air introduced from the air flow input unit 1-25 flows through the grille member 1-273, most of it flows through the interior of the DPF from bottom to top (enters from the end face of the bottom of the DPF, then flows through the interior of the DPF along the length direction of the DPF, and flows out from the end face of the top of the DPF) to clean the particulate matter deposited in the DPF, and a small part flows from the outside of the DPF through the gaps between the support bars 1-272.

[0064] The air flow output unit 1-28 is a pipeline, which is respectively connected to the cleaning chamber 1-26 and the air flow driving unit 1-21. And the pipeline of the air flow output unit 1-28 is specifically connected to the top of the cleaning chamber 10 and the air inlet 1-2121 of the blower 1-212.

[0065] Figure 8 It is a structural schematic diagram of the air intake unit in the first embodiment.

[0066] like Figure 2 and Figure 8 As shown, the air intake unit 1-29 includes an air intake duct 1-291 and an air intake valve 1-292. The air intake duct 1-291 is connected to the duct of the air flow input unit 1-25 for introducing external air. The air intake end of the air intake duct 1-291 is located outside the cabinet 1-10. External air can enter the cleaning chamber 10 after passing through the air intake duct 1-291 and the duct of the air flow input unit 1-25 in sequence. The air intake valve 1-292 is arranged on the air intake duct 1-291, which is an electrically controlled valve, and is used to control whether the air intake duct 1-291 is connected or not connected under the control of the control device 1-90, thereby controlling the introduction of external air.

[0067] The exhaust unit 1-30 includes an exhaust duct 1-301 and an exhaust valve 1-302. The exhaust duct 1-301 is connected to the driving duct 1-213 and is used to exhaust the high-temperature air flow in the driving duct 1-213. The exhaust end of the exhaust duct 1-301 is located outside the cabinet 1-10. The exhaust valve 1-302 is set on the exhaust duct 1-301 and is used to control whether the exhaust duct 1-301 is connected or not connected, thereby controlling the discharge of the high-temperature air flow.

[0068] In this embodiment, the driving pipeline 1-213 is connected to the exhaust pipeline 1-301 and the return pipeline 1-231 through the three-way connecting pipe 1-b. The exhaust valve 1-302 and the return valve 1-232 are linkage valves, and when the control device 1-90 controls one of the two valves to open, the other valve is closed synchronously. The specific linkage relationship is detailed in the linkage valve part 1-31.

[0069] Fig. 9 It is a structural schematic diagram of the linkage valve part in the first embodiment.

[0070] like Figure 3 and Fig. 9 As shown, the linkage valve portion 1-31 includes an exhaust valve 1-302, a return valve 1-232, a linkage member 1-311 and a switching motor 1-312.

[0071] The exhaust valve 1-302 includes a first transmission shaft 1-3021 and a first valve plate 1-3022. The first transmission shaft 1-3021 is arranged on the exhaust pipe 1-301. The first valve plate 1-3022 is arranged in the exhaust pipe 1-301 and connected to the first transmission shaft 1-3021.

[0072] The reflux valve 1-232 includes a second transmission shaft 1-2321 and a second valve plate 1-2322. The second transmission shaft 1-2321 is arranged on the reflux pipe 1-231. The second valve plate 1-2322 is arranged in the reflux pipe 1-231 and connected to the second transmission shaft 1-2321.

[0073] The linkage member 1-311 is respectively connected to the first transmission shaft 1-3021 and the second transmission shaft 1-2321 for realizing linkage. The output shaft of the switching motor 1-312 is connected to the first transmission shaft 1-3021 or the second transmission shaft 1-2321. In this embodiment, the output shaft of the switching motor 1-312 is connected to the first transmission shaft 1-3021, and is used to drive the first transmission shaft 1-3021 to rotate under the control of the control device 1-90, so that the first valve plate 1-3022 is opened or closed, and the second valve plate 1-2322 is closed or opened synchronously.

[0074] In this embodiment, the driving pipe 1-213, the return pipe 1-231, the pipe of the high-temperature air flow input unit 1-25, and the pipe of the high-temperature air flow output unit 1-28 are all heat-insulating pipes.

[0075] Fig.10 is a schematic diagram of the working principle of the air flow circulation of the particle filter cleaning device in the first embodiment; Fig.11 It is a schematic diagram of the working principle of the particle filter cleaning device for rapid cooling in the first embodiment.

[0076] like Fig.10 and 11 As shown, this embodiment also provides a particle filter cleaning method, which uses a particle filter cleaning device 1-100 to clean the DPF, including the following steps:

[0077] Step SA1, placing the DPF in the cleaning chamber 1-26 and on the supporting part 1-27.

[0078] Step SA2, the control device 1-90 closes the intake valve 1-292 and the exhaust valve 1-302, and the return valve 1-232 opens synchronously.

[0079] Step SA3, the control device 1-90 starts the air flow driving unit 1-21 and the heating unit 1-24, so that the air circulates among the air flow driving unit 1-21, the air flow return unit 1-23, the heating unit 1-24, the air flow input unit 1-25, the cleaning chamber 1-26, and the air flow output unit 1-28 (such as Fig.10 As shown by the arrow in the figure), a high-temperature air flow is formed in the process of flowing. When the temperature of the high-temperature air flow measured by the temperature sensor reaches the cleaning temperature of 600°C, the control device 1-90 controls the heating unit 1-24, the intake valve 1-292 and the air flow driving unit 1-21 to keep the high-temperature air flow at the cleaning temperature for 20 minutes, thereby completing the cleaning of the DPF.

[0080] Step SA4: After the DPF cleaning is completed, the heating unit 1-24 is turned off and the temperature is naturally reduced to 500°C.

[0081] Step SA5, the control device 1-90 fully opens the air inlet valve 1-292 and the exhaust valve 1-302, and the return valve 1-232 is synchronously closed. At this time, the external air flows through the air inlet unit 1-29, the air flow input unit 1-25, the cleaning chamber 1-26, the air flow output unit 1-28 and the exhaust unit 1-30 (such as Fig.11 As shown by the arrow in the figure, the DPF is quickly cooled to room temperature.

[0082] Step SA6, air flow driving unit 1-21.

[0083] Step SA7, remove the DPF.

[0084] The above is a detailed process of cleaning the first DPF when the particulate filter cleaning device 1-100 cleans multiple DPFs one by one. In this process, the time required to heat the air flow to a high-temperature air flow of 600°C is about 15 minutes, and the total time for the entire DPF cleaning process is about 1 hour; the detailed process of cleaning subsequent DPFs is similar to that of the first DPF, with the difference that: when the subsequent DPFs are cleaned, the time required to heat the air flow to a high-temperature air flow of 600°C is shortened to about 10 minutes. This is because when the previous DPF processing is completed, the air flow reflux unit 1-23 and the heating unit 1-24 of the particulate filter cleaning device 1-100 retain residual heat.

[0085] Functions and Effects of Embodiment 1

[0086] According to the particle filter cleaning device 1-20 involved in the first embodiment, because it includes a cleaning chamber 1-26, a heating unit 1-24, an air flow driving unit 1-21, an air flow input unit 1-25, an air flow output unit 1-28 and an air flow return unit 1-23, wherein the cleaning chamber 1-26 can place the DPF, the heating unit 1-24 can heat the air flow, the air flow driving unit 1-21 can provide a driving force for the air flow, and the air flow input unit 1-25 can output the high-temperature air flow formed by the heating unit 1-24 to the air flow return unit 1-23. The air flows into the cleaning chamber 1-26, the air flow output unit 1-28 can output the high-temperature air flow in the cleaning chamber 1-26, and the air flow reflux unit 1-23 can reflux the high-temperature air flow from the air flow output unit 1-28 to make the high-temperature air flow circulate, so as to utilize the circulating high-temperature air flow to clean the particulate matter deposited in the DPF placed in the cleaning chamber 1-26, and the high-temperature air flow directly transfers heat to the particulate matter in the DPF, with high heat transfer efficiency, which can not only shorten the cleaning time and reduce the cleaning energy consumption, but also can clean more thoroughly.

[0087] Furthermore, because the heating unit 1-24 in the first embodiment is arranged between the air flow return unit 1-23 and the air flow input unit 1-25, the heating unit 1-24 is arranged closer to the cleaning chamber 1-26, so that the heat provided by the heating unit 1-24 can be better provided to the cleaning chamber 1-26. In addition, because the air flow driving unit 1-21 is arranged between the air flow output unit 1-28 and the air flow return unit 1-23, the air flow driving unit 1-21 is far away from the heating unit 1-24 and is at the lowest temperature position in the high-temperature air flow circulation, avoiding the adverse effect of high temperature on the operation of its driving motor 1-211, ensuring that the air flow driving unit 1-21 can work normally.

[0088] Furthermore, because the device in Example 1 further includes an air intake unit 1-29 and an exhaust unit 1-30, the air intake unit 1-29 can introduce external air into the cleaning chamber 1-26, and the exhaust unit 1-30 can exhaust the high-temperature air flow, and the air intake unit 1-29 has an air intake valve 1-292, and the exhaust unit 1-30 has an exhaust valve 1-302. When the air intake valve 1-292 and the exhaust valve 1-302 are both closed, the air flow can circulate in the device (such as Fig.10 As shown), high temperature cleaning of the DPF is achieved; when both the intake valve 1-292 and the exhaust valve 1-302 are opened, external air can enter from the intake unit 1-29, flow through the cleaning chamber 1-26, and be discharged from the exhaust unit 1-30, thereby achieving rapid cooling of the cleaned DPF.

[0089] Furthermore, because the air flow reflow unit 1-23 in Example 1 has a reflow valve 1-232, the reflow valve 1-232 can control the reflow of the high-temperature air flow. Therefore, when it is necessary to quickly cool down the DPF after cleaning, the intake valve 1-292 and the exhaust valve 1-302 can be opened and the reflow valve 1-232 can be closed. At this time, the external air may not pass through the air flow reflow unit 1-23 and the heating unit 1-24, so that these two units can retain residual heat when the DPF is quickly cooled down. In this way, the heating time of the device when cleaning the next DPF can be shortened, thereby improving the processing efficiency.

[0090] Furthermore, because the pipe of the high-temperature air flow input unit 1-25 in the first embodiment is connected to the lower side of the cleaning chamber 1-26, and the pipe of the high-temperature air flow output unit 1-28 is connected to the upper side 1-26 of the cleaning chamber 1-26, it can be ensured that the air flow in the cleaning chamber 1-26 flows from bottom to top, so that the DPF only needs to be placed vertically in the cleaning chamber 1-26, so that the air flow can flow smoothly inside the DPF, which is conducive to high-temperature cleaning of the DPF and rapid cooling of the DPF, thereby improving processing efficiency. Furthermore, because the heating unit 1-24 is arranged below the cleaning chamber 1-26, it can be ensured that the heat provided by the heating unit 1-24 can be better provided to the cleaning chamber 1-26.

[0091] Furthermore, the heating unit 1-24 in Example 1 includes a tubular shell 1-241, a ceramic column 1-242, and an electric heating wire 1-243. The ceramic column 1-242 has a plurality of through cavities 1-2421. A plurality of electric heating wires 1-243 are respectively arranged in the plurality of through cavities 1-2421, so that the air flow passing through the through cavities 1-2421 can be heated by the electric heating wire 1-243, and the air flow is fully in contact with the heating wire 1-243 through different through cavities 1-2421, so that the air flow passing through the heating unit 1-24 can be quickly heated, the heating efficiency is extremely high, and the energy loss is less.

[0092] Furthermore, a supporting portion 1-27 is provided at the bottom of the cleaning chamber 1-26 in Example 1. The supporting portion 1-27 is connected to the high-temperature air flow input unit and cooperates with the DPF, so as to better support the DPF and ensure that the air flow passes through the inside of the DPF.

[0093] Furthermore, because the supporting portion 1-27 in Example 1 includes a supporting member 1-271, the supporting member 1-271 is cylindrical and has a cone shape that is larger at the top and smaller at the bottom, and the bottom of the supporting member 1-271 is connected to the high-temperature air flow input unit, the supporting member 1-271 is used to support DPFs of different models and has good applicability.

[0094] Furthermore, the cleaning chamber 1-26 in Example 1 includes an insulation cavity 1-261 and an insulation door 1-262 installed on the insulation cavity 1-261. The insulation cavity 1-261 and the insulation door 1-262 both include a metal layer and an insulation layer arranged on the outside of the metal layer. The metal layer is provided with a plurality of through holes. The setting of the through holes can avoid deformation of the metal layer due to multiple hot and cold changes, thereby ensuring that the device can operate stably for a long time; the setting of the insulation layer can avoid unnecessary heat loss and reduce energy consumption.

[0095] Furthermore, the drive pipe 1-213, the return pipe 1-231, the pipe of the high-temperature air flow input unit 1-25 and the pipe of the high-temperature air flow output unit 1-28 in Example 1 are all insulated pipes, which can avoid unnecessary heat loss in these pipes and reduce energy consumption.

[0096] Furthermore, the temperature of the high-temperature air flow in Example 1 is 550° C. to 700° C., and the cleaning time is 5 min to 30 min. Such conditions can meet the requirements of DPF cleaning and can quickly and efficiently complete the cleaning work with very good cleaning effect.

[0097] In addition, according to the particulate filter cleaning equipment 1-100 involved in Example 1, because it includes the above-mentioned particulate filter cleaning device 1-20 and the control device 1-90, the control device 1-90 can control the operation of the particulate filter cleaning device 1-20. Therefore, the equipment can not only automatically clean the particulate oil in the DPF at one time, but also has a fast, efficient, energy-saving and thorough cleaning effect.

[0098] <Example 2>

[0099] Embodiment 2 provides a particle filter cleaning device and a particle filter cleaning method.

[0100] Fig.12 is a schematic diagram of the three-dimensional structure of a particle filter cleaning device in Embodiment 2 of the present invention; Fig.13 It is a schematic diagram of the working principle of the particle filter cleaning device in the second embodiment of the present invention.

[0101] like Fig.12 and Fig.13 As shown, the particle filter cleaning device in this embodiment, which can also be called a DPF duct-type hot air circulation heating device, includes a cabinet 2-14, a particle filter cleaning device and an electric control box 2-15. The particle filter cleaning device includes a cleaning chamber, a supporting portion, an air intake unit, an air flow input unit, an air flow output unit, an air flow drive unit, a three-way pipe 2-12, an exhaust unit, an air flow return unit and a heating unit. Among them, the air flow drive unit includes a circulation fan 2-4 and a drainage fan 2-8.

[0102] The cleaning chamber is a heating chamber 2-5, which is arranged in the middle of the cabinet 2-14. A supporting part for placing and loading the DPF, namely, a loading tool 2-7, is arranged inside the heating chamber 2-5. The air intake unit and the air flow input unit are connected to form an air intake pipe 2-3. The air intake end at the bottom of the heating chamber 2-5 is connected to the air outlet end of the air intake pipe 2-3. An air intake valve 2-2 and a circulating fan 2-4 are arranged on the air intake pipe 2-3. The air intake end of the air intake pipe 2-3 extends out of the cabinet 2-14.

[0103] The air flow output unit is an air outlet pipe 2-13. The air outlet end at the top of the heating chamber 2-5 is connected to the air inlet end of the air outlet pipe 2-13. A drainage fan 2-8 and a flow meter 2-9 are arranged on the air outlet pipe 2-13. The air outlet end of the air outlet pipe 2-13 is connected to the air inlet end of the three-way pipe 2-12.

[0104] One outlet end of the three-way pipe 2-12 is connected to the exhaust unit, which is the exhaust pipe 2-10. The other outlet end of the three-way pipe 2-12 is connected to the air inlet end of the air flow return unit, which is the air circulation pipe 2-1. Among them, the outlet end of the exhaust pipe 2-10 is provided with an exhaust valve 2-11 and the exhaust end of the exhaust pipe 2-10 extends out of the cabinet 2-14.

[0105] A heating unit is arranged inside the air circulation duct 2-1, and the heating unit is an air heating device 2-6. The air outlet end of the air circulation duct 2-1 is connected to the middle part of the air inlet pipe 2-3.

[0106] The electric control box 2-15 is arranged inside the cabinet 2-14.

[0107] In an optional embodiment, the process of processing the DPF using the above-mentioned particle filter cleaning device includes the following process:

[0108] SB1: Install the DPF on the loading fixture 2-7.

[0109] SB2: Start the circulation fan 2-4; the heating device 2-6 heats the air in the air circulation duct 2-1, and the air circulates.

[0110] SB3: Control the opening and closing degree of the intake valve 2-2 and the exhaust valve 2-11 to ensure that an appropriate amount of oxygen enters the air circulation duct 2-1 to participate in the combustion oxidation reaction; at the same time, the exhaust pipe 2-10 discharges part of the exhaust gas.

[0111] SB4: After DPF is processed, it is cooled.

[0112] SB5: During the cooling phase, the heating device 2-6 is turned off to allow the temperature to drop naturally; then, the intake valve 2-2 and the exhaust valve 2-11 are fully opened to introduce cold air to cool the DPF.

[0113] SB6: After the DPF is cooled to the preset temperature, the circulation fans 2-4 are turned off.

[0114] SB7: Completely close the intake valve 2-2 and the exhaust valve 2-11.

[0115] SB8: Remove the DPF and complete the process.

[0116] In an optional embodiment, a plurality of universal wheels may be provided at the bottom of the cabinet 2-14 to facilitate the movement of the entire device.

[0117] Functions and Effects of Embodiment 2

[0118] In the second embodiment, in order to increase the heating speed, a heating device 2-6 is designed to force hot air into the DPF according to the air permeability of the loading tooling 2-7, and the hot air circulates in a closed pipe, thereby improving the heating efficiency and reducing energy consumption.

[0119] In the second embodiment, it is mainly composed of an air intake pipe 2-3, an air circulation duct 2-1, an air outlet pipe 2-13, an air heating device 2-6, a circulating fan 2-4, an exhaust pipe 2-10 and a loading tooling 2-7, so that hot air (and cold air) can pass quickly from the inside of the DPF, which greatly improves the heating speed (and cooling speed) of the DPF, improves the processing efficiency of the DPF, and ensures the processing instructions of the DPF.

[0120] In the second embodiment, the air permeability of the DPF itself is utilized to allow high-temperature air to pass through the pores of the DPF, which effectively and quickly transfers heat to the DPF, greatly improving the heating rate; the pipeline-type internal circulation design effectively transfers heat to the DPF, reduces heat dissipation losses, and saves energy. It can not only be used to heat the DPF, but also can be air-cooled after heating is completed, so that one machine has multiple uses.

[0121] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

[0122] In the first embodiment, the exhaust valve 1-302 and the return valve 1-232 are linked valves. In actual use, the exhaust valve 1-302 and the return valve 1-232 can also be configured as electrically controlled valves that are individually controlled by the control device 1-90.

[0123] In the first embodiment, the air flow driving unit 1-21 is arranged between the air flow reflow unit 1-23 and the air flow input unit 1-25. In actual use, the air flow driving unit 1-21 may also be arranged at other positions, for example, between two sections of the pipes of the air flow reflow unit 1-23 (which may be the position in the second embodiment), or at other positions outside the air flow reflow unit 1-23, as long as it can be ensured that the air flow driving unit 1-21 can provide the power for the air flow to flow normally.

Claims

1. A particle filter cleaning device, used for cleaning particles deposited in a particle filter by means of a high-temperature air flow, characterized in that: include: a cleaning chamber for placing the particle filter; An air intake unit, used for introducing external air into the cleaning chamber, and having an air intake valve for controlling the introduction of the external air; A heating unit, for heating the air flow; An air flow driving unit, used for providing a driving force for the air flow; An air flow input unit, inputting the high-temperature air flow formed by the heating unit into the cleaning chamber; An air flow output unit, outputting the high-temperature air flow in the cleaning chamber; an air flow reflow unit, which reflows the high-temperature air flow from the air flow output unit so that the high-temperature air flow circulates, and the air flow reflow unit has a reflow valve for controlling the reflow of the high-temperature air flow; as well as an exhaust unit for exhausting the high-temperature air flow, and having an exhaust valve for controlling the exhaust of the high-temperature air flow, The heating unit is disposed between the air flow return unit and the air flow input unit. The intake valve and the exhaust valve are closed, the return valve is opened, and the air flow driving unit and the heating unit are started, so that the air circulates among the air flow driving unit, the air flow return unit, the heating unit, the air flow input unit, the cleaning chamber, and the air flow output unit, and the high-temperature air flow is formed during the flow, thereby cleaning the particles deposited in the particle filter; after the cleaning is completed, the heating unit is closed, the intake valve and the exhaust valve are opened, and the return valve is closed, and the external air flows through the intake unit, the air flow input unit, the cleaning chamber, the air flow output unit and the exhaust unit in sequence, thereby quickly cooling down the particle filter, and the air flow return unit and the heating unit retain residual heat.

2. The particle filter cleaning device according to claim 1, characterized in that: in, The air flow driving unit is disposed between the air flow output unit and the air flow return unit.

3. The particle filter cleaning device according to claim 2, characterized in that: in, The pipe of the air flow input unit is connected to the lower side of the cleaning chamber. The pipe of the air flow output unit is connected to the upper side of the cleaning chamber. The heating unit is disposed below the cleaning chamber.

4. The particle filter cleaning device according to claim 1, characterized in that: in, A supporting portion matched with the particle filter is provided at the bottom of the cleaning chamber, and the supporting portion is communicated with the air flow input unit.

5. The particle filter cleaning device according to claim 4, characterized in that: in, The supporting portion includes a supporting member, which is cylindrical and shaped like a truncated cone with a larger upper portion and a smaller lower portion, and the bottom of the supporting member is connected to the air flow input unit.

6. The particle filter cleaning device according to claim 1, characterized in that: in, The cleaning chamber comprises a heat preservation cavity and a heat preservation door installed on the heat preservation cavity. The heat-insulating cavity and the heat-insulating door both include a metal layer and a heat-insulating layer arranged outside the metal layer, and the metal layer is provided with a plurality of through holes. The pipes of the air flow driving unit, the air flow return unit, the air flow input unit, and the air flow output unit are all heat-insulating pipes.

7. The particle filter cleaning device according to claim 1, characterized in that: in, The temperature of the high-temperature air flow is 550° C. to 700° C., and the cleaning time is 5 min to 30 min.

8. A particle filter cleaning device, characterized in that: include: Cabinet; a particle filter cleaning device, installed on the cabinet, for cleaning particles deposited in the particle filter; as well as a control device for controlling the operation of the particle filter cleaning device, Wherein, the particle filter cleaning device is the particle filter cleaning device described in any one of claims 1-7.

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