Heating units, particle filter cleaning devices and equipment

Abstract

The present invention belongs to the field of automobiles, and specifically relates to a heating unit, a particle filter cleaning device and a particle filter cleaning equipment. The particle filter cleaning device of the particle filter cleaning equipment has a heating unit, and the heating unit is arranged in an insulating column in a tubular shell with a plurality of through cavities, and a plurality of heating wires are respectively arranged in the plurality of through cavities, and each heating wire has two connecting ends, and all the connecting ends are electrically connected to the wiring terminals of a wiring unit arranged at the end of the tubular shell in a predetermined manner, and the wiring terminals are connected to an external power supply to supply power to the heating wire, so that the air flow passing through the through cavity can be heated by the heating wire, and the air flow is fully in contact with the heating wire through different through cavities, so that the temperature of the air flow passing through the heating unit can quickly reach a predetermined temperature, the heating efficiency is higher, and the energy loss is less.

Description

Technical Field

[0001] The invention belongs to the field of automobiles, and in particular relates to a heating unit, 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 particulate filter (DPF) disposed in the exhaust pipe. When the exhaust gas in the exhaust pipe passes through the DPF, the particulate matter 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 particulate matter and oil inside the DPF filter element also accumulate. The accumulated particulate matter and oil inside the DPF filter element will cause the vehicle to have problems such as increased exhaust back pressure, increased fuel consumption, and decreased power. In addition, when the DPF filter element is severely clogged, it will also cause the exhaust gas to be unable to be discharged.

[0003] The traditional solution is to regularly remove the DPF from the exhaust system of the diesel vehicle and clean it to restore it to normal working levels. The commonly used method for cleaning the DPF is heating regeneration cleaning. The principle of this method is to burn and oxidize the adsorbed particulate matter inside the DPF by high-temperature heating, thereby achieving the cleaning purpose. Heating regeneration cleaning is usually achieved through a DPF heating furnace. The DPF heating furnace has a furnace cavity and a resistance wire coiled in the furnace cavity. The DPF is placed in the furnace cavity. The DPF heating furnace 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, this method of cleaning the DPF has poor heat transfer efficiency, the entire process of cleaning the DPF is time-consuming, and the energy cost is extremely high. Summary of the invention

[0004] The present invention is made to solve the above-mentioned problem, and its object is to provide a heating unit, a particle filter cleaning device and a particle filter cleaning equipment.

[0005] The present invention provides a heating unit having the following characteristics, comprising: a tubular shell; an insulating column, which is arranged in the tubular shell and has a plurality of through cavities; a plurality of heating wires, which are respectively arranged in the plurality of through cavities; a wiring unit, which is arranged at the end of the tubular shell, wherein each heating wire has two connecting ends, and the wiring unit has a plurality of connecting ends which are in communication with an external power source and are used to be electrically connected to the connecting ends, and all the connecting ends of the plurality of heating wires are electrically connected to the plurality of connecting ends according to a predetermined connection method.

[0006] The heating unit provided by the present invention may also have the following characteristics: an external power supply provides three-phase alternating current of U phase, V phase and W phase, 3m heating wires are arranged, m≥1, and divided into m groups, the two connection ends of each heating wire are respectively a first connection end and a second connection end, 3m wiring terminals are arranged, and divided into m groups, the three wiring terminals in each group are respectively connected to the power supply ends of U phase, V phase and W phase, and the predetermined connection method is: all the first connection ends in each group of heating wires are interconnected, and all the second connection ends are respectively interconnected with three of the corresponding group of wiring terminals; or the predetermined connection method is: each group of heating wires is connected in series, and the first connection ends and the second connection ends of two adjacent heating wires respectively form three connection points, and the three connection points are respectively interconnected with three of the corresponding group of wiring terminals.

[0007] The heating unit provided by the present invention may also have the following features: wherein the wiring unit contains three wiring piles, which are arranged on the ends of the tubular shell, and the wiring piles include a stainless steel connector and a high-temperature resistant insulating sleeve wrapped around the outer surface of the stainless steel connector, and the three stainless steel connectors are respectively connected to the power supply terminals of the U phase, V phase, and W phase, and the wiring terminals of the same phase in each group of wiring terminals are connected to the stainless steel connectors of the same phase.

[0008] The heating unit provided by the present invention may also have the following characteristics: wherein, a plurality of cavities are distributed in two layers along the circumference of the insulating column, the number of cavities in each layer is set to 3m, each heating wire is distributed in a U-shape in two cavities distributed in pairs, and one of the two cavities in the pair is located in one layer, and the other is located in another layer.

[0009] The heating unit provided by the present invention may also have the following characteristics: wherein, a plurality of cavities are distributed in two layers along the circumference of the insulating column as a central layer and an edge layer, the number of cavities in the central layer is set to 2m, the number of cavities in the edge layer is set to 4m, each heating wire is distributed in a U-shape in two cavities distributed in pairs, the two pairs of cavities are arranged adjacent to each other, and all the heating wires are centrally symmetrical.

[0010] The heating unit provided by the present invention may also have the following feature: at least three protrusions for positioning the heating wire are arranged in the through cavity, and the protrusions are used to position the heating wire at the center of the through cavity.

[0011] The heating unit provided by the present invention may also have the following features: wherein the tubular shell is a metal shell with a length of 65cm to 75cm and an inner diameter of 20cm to 22cm; the length of the insulating column is 3cm to 10cm shorter than the length of the tubular shell; a gap is formed between the insulating column and the tubular shell, the gap being 0.4cm to 0.75cm; and the insulating column includes a plurality of ceramic column parts that are adjacently joined in sequence.

[0012] The heating unit provided by the present invention may also have the following features: wherein the particle filter cleaning device also includes a cleaning chamber for placing the particle filter and a high-temperature air input unit for inputting high-temperature air into the cleaning chamber, the heating unit is located below the cleaning chamber, and the air heated to a high temperature is input into the cleaning chamber through the high-temperature air input unit.

[0013] The present invention provides a particle filter cleaning device having the following characteristics, including: a cleaning chamber for placing a particle filter; a heating unit for heating an air flow; an air flow driving unit for providing a driving force for the air flow; an air flow input unit for inputting a 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, wherein the heating unit is any one of the heating units above.

[0014] The present invention provides a particle filter cleaning device having the following characteristics, comprising: a cabinet; a particle filter cleaning device; and 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 as described above.

[0015] 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.

[0016] Functions and Effects of the Invention

[0017] According to the heating unit, particle filter cleaning device and particle filter cleaning equipment involved in the present invention, because the particle filter cleaning device of the particle filter cleaning equipment has a heating unit, the heating unit is arranged in an insulating column in a tubular shell with a plurality of through cavities, and a plurality of electric heating wires are respectively arranged in the plurality of through cavities, each electric heating wire has two connection ends, and all the connection ends are electrically connected to the wiring terminals of the wiring unit arranged at the end of the tubular shell in a predetermined manner, and the wiring terminals are connected to the external power supply to supply power to the heating wire, so that the air flow passing through the through cavity can be heated by the heating wire, and the air flow is fully in contact with the heating wire through different through cavities, so that the temperature of the air flow passing through the heating unit can quickly reach the predetermined temperature, the heating efficiency is extremely high, and the energy loss is less. Therefore, the particle filter cleaning device and particle filter cleaning equipment of the present invention can clean the particulate oil in the particle filter at one time, the operation is simple, and the labor cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a particle filter cleaning device according to an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of a particle filter cleaning device in an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of a heating unit in an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of the end surface structure of a heating unit in an embodiment of the present invention;

[0022] Figure 5 is a schematic structural diagram of an insulating column in an embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the connection relationship of each group of heating wires in an embodiment of the present invention;

[0024] Figure 7 is a schematic diagram of the end surface structure of the insulating column in the first variation of the present invention;

[0025] Figure 8 It is a schematic diagram of the connection relationship of each group of heating wires in the second variant of the present invention. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and the accompanying drawings specifically illustrate a heating unit, a particle filter cleaning device and a particle filter cleaning equipment of the present invention.

[0027] <Example>

[0028] This embodiment describes in detail the specific structure and use method of the particle filter cleaning device.

[0029] Figure 1 Schematic diagram of the structure of the particle filter cleaning device in this embodiment.

[0030] like Figure 1 As shown, the particle filter cleaning device 1 includes a cabinet 2 , a particle filter cleaning device 3 and a control device 4 .

[0031] The cabinet body 2 is a stainless steel rectangular cabinet, and four supporting feet 5 are respectively fixed on the four corners of the bottom surface, so that the cabinet body 2 has a certain distance from the ground to facilitate heat dissipation.

[0032] The control device 4 is installed on the cabinet 2 to control the operation of the particle filter cleaning device 3 .

[0033] Figure 2 Schematic diagram of the structure of the particle filter cleaning device in this embodiment.

[0034] like Figure 2 As shown, the particle filter cleaning device 3 is installed in the cabinet 2, and includes an air flow driving unit 6, an air flow return 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 and an exhaust unit 33.

[0035] The air flow driving unit 6 has a driving motor 12, a blower 13 and a driving duct 14. The driving motor 12 is installed on the top of the cabinet 2, and the blower 13 is connected to the output end of the driving motor 12, and has an air inlet 15 and an air outlet 16. The blower 13 can suck air from the air inlet 15 when driven by the driving motor 12, and discharge it from the air outlet 16 after generating air flow. The driving duct 14 is connected to the air outlet 16 of the blower 13, and the air flow enters the driving duct 14 after being generated by the blower 13.

[0036] The air flow reflow unit 7 is a delivery pipe, which is connected to the driving pipe 14 , and the air flow enters the delivery pipe through the driving pipe 14 .

[0037] The heating unit 8 is in communication with the air flow return unit 7 , and can heat the air flow delivered by the air flow return unit 7 to form a high-temperature air flow.

[0038] Figure 3 is a schematic diagram of the structure of the heating unit in this embodiment, Figure 4 Schematic diagram of the end structure of the heating unit in this embodiment.

[0039] like Figure 3 , 4As shown, the heating unit 8 includes a tubular housing 17 , an insulating column 18 , a plurality of heating wires 19 and a wiring unit 20 .

[0040] One end of the tubular housing 17 is connected to the air flow return unit 7, and the other end is connected to the air flow input unit 9. The tubular housing 17 is a high temperature resistant stainless steel housing, with a length of 65 cm to 75 cm and an inner diameter of 20 cm to 22 cm. The outer surface of the tubular housing 17 is covered with a heat preservation layer (not shown in the figure), which can keep the tubular housing warm. The end surface of the tubular housing 17 connected to the air flow input unit 8 has four mounting parts 39 evenly distributed along the circumference of the tubular housing 17.

[0041] Figure 5 Schematic diagram of the structure of the insulating column in this embodiment.

[0042] like Figure 5 As shown, the insulating column 18 is installed in the tubular housing 17, and its length is 3 cm to 10 cm shorter than the length of the tubular housing 17. A gap of 0.4 cm to 0.75 cm is formed between the insulating column 18 and the tubular housing 17, and the gap is filled with a heat-insulating material, which can play a certain buffering role and prevent the insulating column from colliding with the tubular housing.

[0043] The insulating column 18 includes a plurality of ceramic column parts 21 which are connected in sequence by bolts and have a plurality of through cavities 22, and the extending direction of the through cavities 22 is consistent with the length direction of the insulating column 18. The plurality of through cavities 22 are distributed in two layers as an inner layer and an outer layer along the circumference of the insulating column 18, and the number of through cavities 22 in each layer is set to 3m, where m≥1.

[0044] In this embodiment, m=3, the number of through cavities 22 in each layer is 9, and the 9 through cavities 22 in the two layers correspond to each other. The cross section of the through cavities 22 in the inner layer is fan-shaped, and the cross section of the through cavities 22 in the corresponding outer layer is quadrilateral.

[0045] The plurality of heating wires 19 are arranged to be 3m in number, m≥1, and divided into m groups. In the present embodiment, m=3, and the number of heating wires is 9, which are divided into 3 groups. Each heating wire is spiral-shaped and has two connection ends, which are respectively a first connection end 23 and a second connection end 24. Each heating wire 19 is U-shaped and distributed in two through-cavities 22 distributed in pairs, one of the two through-cavities 22 is located in one layer, and the other is located in another layer, and heats the air flow passing through the through-cavities 22 to generate a high-temperature air flow.

[0046] The total power of the plurality of heating wires 19 is greater than 10 KW. In the present embodiment, the total power of the plurality of heating wires 19 is preferably 27 KW.

[0047] The heating wire material used in this embodiment is Beijing Shougang HRE material, with a wire diameter of 1.8 mm and a resistivity of 1.45. The outer diameter of the spirally formed column is 21 mm and the inner diameter is (21-1.8×2) mm.

[0048] The wiring unit 20 has three wiring posts 25 and 3 wiring terminals 26 .

[0049] Three terminal posts 25 are fixed to the end of one end of the tubular shell 17 connected to the air flow return unit 7, and each terminal post 25 includes a stainless steel connector 27 and a high temperature resistant insulating sleeve 28. The three stainless steel connectors 27 are electrically connected to the U phase power supply terminal, V phase power supply terminal, and W phase power supply terminal of an external power supply that provides three-phase alternating current of U phase, V phase, and W phase, respectively, as U terminal posts, V terminal posts, and W terminal posts. The three high temperature resistant insulating sleeves 28 correspond to the three stainless steel connectors 27 one by one, respectively wrapping the outer surface of the corresponding stainless steel connector 27 to prevent the stainless steel connector 27 from conducting electricity with the tubular shell 17.

[0050] The connection terminals 26 are arranged to be 3m, m≥1, divided into m groups. In the present embodiment, m=3, and the 9 connection terminals are divided into 3 groups, namely, group U, group V and group W, that is, the 9 connection terminals are U1, U2, U3, V1, V2, V3, W1, W2, W3.

[0051] The three wiring terminals U1, U2, and U3 are connected to the U wiring post, the three wiring terminals V1, V2, and V3 are connected to the V wiring post, and the three wiring terminals W1, W2, and W3 are connected to the W wiring post.

[0052] Figure 6 Schematic diagram of the connection relationship of each group of heating wires in this embodiment.

[0053] Take the connection relationship of the first group of heating wires 19 as an example for explanation. Figure 6 As shown, the first connection ends 23 of the three heating wires 19 are connected to each other, and the second connection ends 24 of the three heating wires 19 are connected to the U1 terminal, the V1 terminal, and the W1 terminal respectively.

[0054] The connection relationship between the other two groups of heating wires is similar to that of the first group of heating wires, and will not be described in detail here.

[0055] In this embodiment, the three-phase AC voltage provided by the external power supply is 380V. After being connected in the above manner, the voltage applied to each heating wire 19 is 220V.

[0056] In addition, ceramic beads (not shown in the figure) are wrapped on the outer surfaces of the first connecting ends 23 and the second connecting ends 24 of the plurality of heating wires 19 to prevent the plurality of heating wires 19 from contacting each other and causing a short circuit.

[0057] The air flow input unit 9 is a pipe, which is connected to the heating unit 8 and conveys the high-temperature air flow generated by the heating unit 8 .

[0058] The cleaning chamber 10 is a rectangular box, including a heat preservation chamber 29 and a heat preservation door 30 installed on the heat preservation chamber 29. The heat preservation chamber 29 and the heat preservation door 30 both include a metal layer and a heat preservation layer arranged outside the metal layer, and the metal layer is provided with a plurality of through holes 31. The cleaning chamber 10 is located above the heating unit 8 and is connected to the air flow input unit 9. The particle 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 particle filter.

[0059] The air flow output unit 11 is a pipeline, which is connected to the cleaning chamber 10 and the air flow driving unit 6 respectively, and the high-temperature air flow circulates under the drive of the air flow driving unit 6.

[0060] The air intake unit 32 is a pipeline, which is connected to the air flow input unit 9 , and can introduce external air into the cleaning chamber 10 through the air flow input unit 9 .

[0061] The exhaust unit 33 is a duct, which is connected to the air flow driving unit 6 and can exhaust the high-temperature air flow.

[0062] Electrically controlled valves are provided between the air intake unit 32 and the air flow input unit 9 , between the air exhaust unit 33 and the air flow driving unit 6 , and between the air flow driving unit 6 and the air flow return unit 7 .

[0063] The particle filter in this embodiment is a DPF, and the working process of the particle filter cleaning device 1 in this embodiment is as follows:

[0064] First, the operator starts the particle filter cleaning device 1, puts the particle filter into the heat preservation chamber 29, closes the heat preservation door 30, and turns on the air flow drive unit 6 through the control device 4. The electric control valve of the air intake unit 32 is closed, the electric control valve between the exhaust unit 33 and the air flow drive unit 6 is closed, and the electric control valve between the air flow drive unit 6 and the air flow return unit 7 is opened. The air flow drive unit 6 generates air flow after sucking air from the air inlet 15 and discharges it into the air flow return unit 7 from the air outlet 16. The air flow is transported to the heating unit 8 through the air flow return unit 7. The external power supply is turned on, and the external power supply provides U, V, and W three-phase alternating current to the three wiring posts 25 of the wiring unit 20. The nine wiring terminals 26 connected to the wiring posts 26 respectively supply power to the nine heating wires 19. After the heating wires 19 are energized, the temperature rises, and the total power reaches 27KW. The air flows through the 18 through-cavities 22 on the insulating column, and after heat exchange with the electric heating wires 19 in the through-cavities 22, the air flows are heated to become high-temperature air flows. The high-temperature air flows enter the heat preservation cavity 29 through the air flow input unit 9, and clean the particle filter in the heat preservation cavity 29, so that the particles accumulated in the particle filter are fully burned. The high-temperature air flows are converted into low-temperature air flows after passing through the particle filter. The low-temperature air flows enter the air flow driving unit 6 again through the air inlet 15 under the driving action of the air flow driving unit 6, and enter the air flow return unit 7 from the air outlet 16 for recirculation.

[0065] In this embodiment, the temperature is raised to 550°C to 700°C within 10-20 minutes to reach the cleaning stage, and the temperature in the cleaning stage is 550°C to 700°C for 10-20 minutes. After many tests, it was found that the particulate oil in the particle filter can be cleaned under this temperature condition, and the particulate oil in the particle filter can be completely burned during the cleaning process without generating harmful gases due to incomplete combustion.

[0066] After cleaning is completed, the electric control valve of the air intake unit 32 is fully opened, the electric control valve between the exhaust unit 33 and the air flow driving unit 6 is opened, and the electric control valve between the air flow driving unit 6 and the air flow return unit 7 is closed. Under the action of the air flow driving unit 6, the external air passes through the air intake unit 32, the air flow input unit 9, the cleaning chamber 10, the air flow output unit 11 and the exhaust unit 33 in sequence and then is discharged. When the particle filter drops to a temperature that can be taken out, open the heat preservation door 30 to take out the cleaned particle filter.

[0067] <Modification 1>

[0068] The present modification example is different from the embodiment in that the heating unit 34 of the particulate filter washing device 1 is different.

[0069] Figure 7Schematic diagram of the end face structure of the insulating column in this variation.

[0070] like Figure 7 As shown, the insulating column 35 of the heating unit 34 has a plurality of through cavities 36, and the plurality of through cavities 36 are distributed in two layers along the circumference of the insulating column 35 as a central layer and an edge layer. The number of through cavities in the central layer is set to 2m, and the number of cavities in the edge layer is set to 4m.

[0071] In this variation, m=3, the cross-section of the through-cavities 36 in the center layer is fan-shaped, the number is 6, the three corners of the fan-shaped have first protrusions 37 protruding toward the center of the fan-shaped, and the first protrusions 37 extend along the length direction of the through-cavity 36 to both ends of the through-cavity 36. The cross-section of the through-cavities in the edge layer is quadrilateral, the number is 12, the four corners of the quadrilateral have second protrusions 38 protruding toward the center of the quadrilateral, and the second protrusions 38 extend along the length direction of the through-cavity 36 to both ends of the through-cavity 36.

[0072] Each heating wire 19 is distributed in two through-cavities 36 distributed in pairs, the two through-cavities 36 in pairs are arranged adjacent to each other, and all the heating wires 19 are centrally symmetrical. The first protrusion 37 and the second protrusion 38 in the through-cavity 36 keep the position of the heating wire 19 at the center of the through-cavity, so that the contact area between the heating wire and the cavity is reduced, the thermal conductivity is reduced, and the heating efficiency of the air flow is improved.

[0073] <Modification 2>

[0074] The difference between this variation and the embodiment is that the connection relationship of each group of heating wires is different.

[0075] Figure 8 Schematic diagram of the connection relationship of each group of heating wires in this variation.

[0076] Take the connection relationship of the first group of heating wires 19 as an example for explanation. Figure 8 As shown, three heating wires 19 are connected in series, and the first connection ends 23 and the second connection ends 24 of two adjacent heating wires 19 form three connection points respectively, which are respectively connected to a corresponding group of U1 terminals, V1 terminals and W1 terminals.

[0077] The connection relationship between the other two groups of heating wires is similar to that of the first group of heating wires 19 and will not be described in detail here.

[0078] Functions and Effects of the Embodiments

[0079] According to the heating unit, particle filter cleaning device and particle filter cleaning equipment involved in this embodiment, because the particle filter cleaning device of the particle filter cleaning equipment has a heating unit, the heating unit is arranged in an insulating column in a tubular shell with a plurality of through-cavities, and a plurality of heating wires are respectively arranged in the plurality of through-cavities, each heating wire has two connecting ends, all the connecting ends are electrically connected to the wiring terminals of the wiring unit arranged at the end of the tubular shell in a predetermined manner, and the wiring terminals are connected to an external power supply to supply power to the heating wires, so that the air flow passing through the through-cavities can be heated by the heating wires, and the air flow is fully in contact with the heating wires through different through-cavities, so that the temperature of the air flow passing through the heating unit can quickly reach the predetermined temperature, the heating efficiency is extremely high, and the energy loss is less.

[0080] According to the particle filter cleaning device involved in this embodiment, when cleaning the particle filter placed in the cleaning chamber, the air flow driving unit drives the air flow to enter the heating unit through the air flow reflux unit, and the heating unit heats the air flow to make it a high-temperature air flow, and then enters the cleaning chamber through the air flow input unit to clean the particle filter. After cleaning, the high-temperature air flow returns to the air flow reflux unit through the air flow output unit to recirculate. Because the heating unit can heat the air flow to 550℃~700℃ within 10min-20min, and maintain the temperature for 10min-20min, the particles and oil in the particle filter can be fully burned, no secondary pollution is generated, and the cleaning is completed in one step, thereby improving the cleaning efficiency of the particle filter.

[0081] According to the particle filter cleaning equipment involved in this embodiment, because it has the above-mentioned particle filter cleaning device and control device, it can complete the cleaning of the particle filter under the control of the control device, with high cleaning efficiency, simple steps, low labor cost, and use high-temperature air flow to clean the particle filter, without the need for additional high-pressure pulse airflow equipment, low equipment cost, and suitable for promotion.

[0082] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

[0083] In the embodiment of the present invention, the tubular shell is made of high-temperature resistant stainless steel material. In practical applications, the material of the tubular shell can be any high-temperature resistant material.

[0084] In an embodiment of the present invention, the tubular shell is made of high-temperature resistant stainless steel material, and the terminal post needs to include a high-temperature resistant insulating sleeve made of ceramic. In practical applications, when the tubular shell is made of insulating material, the terminal post may not have a high-temperature resistant insulating sleeve.

[0085] In this embodiment, the wiring post of the wiring unit is a stainless steel connector, and the wiring terminal is connected to the external power supply through the stainless steel connector. In practical applications, the wiring post of the wiring unit can be a hollow column, and the wiring terminal passes through the wiring post and is directly connected to the external power supply.

Claims

1. A heating unit, arranged in a particle filter cleaning device, characterized in that: include: Tubular housing; An insulating column, disposed in the tubular housing, having a plurality of through cavities; A plurality of electric heating wires are respectively arranged in a plurality of the through cavities; A wiring unit is provided at an end of the tubular housing, Wherein, each of the heating wires has two connection ends. The wiring unit has a plurality of wiring terminals which are connected to an external power source and are used to be electrically connected to the connection terminals. All the connection ends of the plurality of heating wires are electrically connected to the plurality of wiring terminals in a predetermined connection manner, The external power supply provides three-phase alternating current of phase U, phase V and phase W. The heating wires are arranged to be 3m in number, m≥1, and divided into m groups, and the two connecting ends of each heating wire are respectively a first connecting end and a second connecting end, The wiring terminals are arranged in 3m pieces and divided into m groups, and the three wiring terminals in each group are connected to the power supply terminals of the U phase, the V phase, and the W phase respectively. The predetermined connection mode is: all the first connection ends of each group of the heating wires are connected to each other, and all the second connection ends are respectively connected to three of the corresponding group of the wiring terminals; or The predetermined connection mode is: each group of the heating wires is connected in series, the first connection ends and the second connection ends of two adjacent heating wires form three connection points respectively, and the three connection points are respectively connected to three of the wiring terminals in the corresponding group, The plurality of through cavities are distributed in two layers along the circumference of the insulating column, and the number of cavities in each layer is set to 3m. Each of the heating wires is distributed in a U shape in two through-cavities distributed in pairs, and one of the two through-cavities in a pair is located in one layer, and the other is located in another layer.

2. A heating unit, arranged in a particle filter cleaning device, characterized in that: include: Tubular housing; An insulating column, disposed in the tubular housing, having a plurality of through cavities; A plurality of electric heating wires are respectively arranged in a plurality of the through cavities; A wiring unit is provided at an end of the tubular housing, Wherein, each of the heating wires has two connection ends. The wiring unit has a plurality of wiring terminals which are connected to an external power source and are used to be electrically connected to the connection terminals. All the connection ends of the plurality of heating wires are electrically connected to the plurality of wiring terminals in a predetermined connection manner, The external power supply provides three-phase alternating current of phase U, phase V and phase W. The heating wires are arranged to be 3m in number, m≥1, and divided into m groups, and the two connecting ends of each heating wire are respectively a first connecting end and a second connecting end, The wiring terminals are arranged in 3m pieces and divided into m groups, and the three wiring terminals in each group are connected to the power supply terminals of the U phase, the V phase, and the W phase respectively. The predetermined connection mode is: all the first connection ends of each group of the heating wires are connected to each other, and all the second connection ends are respectively connected to three of the corresponding group of the wiring terminals; or The predetermined connection mode is: each group of the heating wires is connected in series, the first connection ends and the second connection ends of two adjacent heating wires form three connection points respectively, and the three connection points are respectively connected to three of the wiring terminals in the corresponding group, The plurality of cavities are distributed in two layers along the circumference of the insulating column as a central layer and an edge layer. The number of cavities in the central layer is set to 2m, and the number of cavities in the edge layer is set to 4m. Each of the heating wires is distributed in a U shape in two cavities distributed in pairs, the two cavities in a pair are arranged adjacent to each other, and all the heating wires are centrally symmetrical.

3. The heating unit according to claim 1 or 2, characterized in that: in, The wiring unit comprises three wiring posts, and the three wiring posts are arranged on the end of the tubular housing. The terminal post comprises a stainless steel connector and a high temperature resistant insulating sleeve wrapped around the outer surface of the stainless steel connector. The three stainless steel connectors are connected to the power supply terminals of the U phase, V phase, and W phase respectively. The wiring terminals of the same phase in each group of the wiring terminals are connected to the stainless steel connecting pieces of the same phase.

4. The heating unit according to claim 1 or 2, characterized in that: in, At least three protrusions for positioning the heating wire are arranged in the through cavity, and the protrusions are used to position the heating wire at the center of the through cavity.

5. The heating unit according to claim 1 or 2, characterized in that: in, The tubular shell is a metal shell with a length of 65 cm to 75 cm and an inner diameter of 20 cm to 22 cm. The length of the insulating column is 3 cm to 10 cm shorter than the length of the tubular housing. A gap is formed between the insulating column and the tubular housing, and the gap is 0.4 cm to 0.75 cm. The insulating column includes a plurality of ceramic column parts which are adjacently connected in sequence.

6. The heating unit according to claim 1 or 2, characterized in that: in, The particle filter cleaning device further includes a cleaning chamber in which the particle filter is placed and a high-temperature air input unit for inputting high-temperature air into the cleaning chamber. The heating unit is located below the cleaning chamber, and inputs air heated to a high temperature into the cleaning chamber through the high temperature air input unit.

7. A particle filter cleaning device, characterized in that: include: a cleaning chamber for placing the particle filter; 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; as well as an air flow return unit, which returns the high-temperature air flow from the air flow output unit so that the high-temperature air flow circulates, Wherein, the heating unit is the heating unit described in any one of claims 1-6.

8. A particle filter cleaning device, characterized in that: include: Cabinet; Particle filter cleaning device; 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 according to claim 7.

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