WO2018072559A1 - 尿素泵模块 - Google Patents

尿素泵模块 Download PDF

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Publication number
WO2018072559A1
WO2018072559A1 PCT/CN2017/099324 CN2017099324W WO2018072559A1 WO 2018072559 A1 WO2018072559 A1 WO 2018072559A1 CN 2017099324 W CN2017099324 W CN 2017099324W WO 2018072559 A1 WO2018072559 A1 WO 2018072559A1
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WO
WIPO (PCT)
Prior art keywords
urea
pump
housing
heating blanket
pump module
Prior art date
Application number
PCT/CN2017/099324
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English (en)
French (fr)
Inventor
林魁
龚超
薛运峰
Original Assignee
天纳克（苏州）排放系统有限公司
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Application filed by 天纳克（苏州）排放系统有限公司 filed Critical 天纳克（苏州）排放系统有限公司
Publication of WO2018072559A1 publication Critical patent/WO2018072559A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1426—Filtration means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1433—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1486—Means to prevent the substance from freezing

Definitions

  • the invention relates to a urea pump module, belonging to the technical field of engine exhaust aftertreatment.
  • urea injection systems include a urea pump module that is disposed outside of the urea tank and connected by a urea tube.
  • this design takes up a lot of space and is not conducive to vehicle installation.
  • the object of the present invention is to provide a urea pump module with better heating and thawing effect.
  • a urea pump module for mounting on the bottom of a urea tank
  • the urea pump module including a base, a pump assembly mounted on the base, and a cover on the pump a housing assembly on the assembly
  • the base is provided with a circuit board and a urea outlet joint
  • the pump assembly including a urea pump for delivering a urea solution to the urea outlet joint and for driving the urea pump and a pump coil connected to the circuit board
  • the housing assembly comprising a housing and a first heating blanket closely abutting the inner side of the housing, the housing being made of a metal material, the housing being provided There is a first slot for entering the urea solution; the first heating blanket is a flexible heating element and is connected to the circuit board.
  • the housing is provided with a top wall and a cylindrical side wall, the top wall is provided with an opening, and the first heating blanket is closely abutted on the inner side of the side wall .
  • the first heating blanket is fixed to the side wall by a plurality of fixing elements.
  • the bottom of the side wall is provided with a plurality of first cantilevers, and each of the first cantilevers is provided. a first slot; the base is provided with a plurality of first protrusions that are held in a vertical direction at a bottom of the first slot.
  • the side wall is provided with a lower edge
  • the base is provided with an annular groove for receiving the lower edge
  • the first slot runs downward through the lower edge, each first The first slot is disposed on both sides of the cantilever, and the first cantilever is trapezoidal.
  • the base is provided with a base body, a second heating blanket laid on the base body, and a bottom cover fixed under the seat body, wherein the base body is provided a plate-shaped portion, an annular flange that protrudes upward from the plate-like portion, and a convex portion that protrudes downward from the plate-shaped portion, the plate-shaped portion is provided with an upper surface, and the second heating blanket is laid on The upper surface is connected to the circuit board.
  • the plate portion is provided with a through hole communicating with the urea outlet joint, and the second heating blanket surrounds the through hole.
  • the upper surface of the plate portion is provided with a boss, the through hole is located in the boss; the pump assembly is provided with a convex column protruding downward, the protruding column Inserted in the through hole.
  • the pump assembly at least partially fits over the boss, and the second heating blanket surrounds the boss.
  • the first heating blanket surrounds a periphery of the pump assembly
  • the pump assembly includes a pump unit, a pump casing that is shielded at a periphery of the pump unit, and surrounds the pump a first filter at the bottom of the unit and a second filter at the periphery of the first filter.
  • the first heating blanket of the present invention is a flexible heating element, which is arranged to be in close contact with the inner side of the casing to improve the heat transfer effect; on the other hand, the first heating blanket Surrounding the periphery of the pump assembly solves the problem of heating the urea inside the housing.
  • Figure 1 is a perspective view of a urea pump module of the present invention.
  • Figure 2 is a perspective view of another angle of Figure 1.
  • Fig. 3 is a front view of Fig. 1.
  • Figure 4 is a rear elevational view of Figure 1.
  • Figure 5 is a plan view of Figure 1.
  • Fig. 6 is a bottom view of Fig. 1;
  • Figure 7 is a left side view of Figure 1.
  • Figure 8 is a right side view of Figure 1.
  • Figure 9 is a partial exploded perspective view of Figure 1 with the housing assembly separated.
  • Figure 10 is a perspective view of the housing assembly of Figure 9 at another angle.
  • Figure 11 is an exploded perspective view of Figure 10 .
  • Figure 12 is a further exploded perspective view of the housing assembly of Figure 9 removed.
  • Figure 13 is an exploded perspective view of another angle of Figure 12;
  • Figure 14 is a partial perspective exploded view of the pump assembly of Figure 13;
  • Figure 15 is a further exploded perspective view of Figure 14.
  • Figure 16 is an exploded perspective view of another angle of Figure 15.
  • Figure 17 is an exploded perspective view of another angle of Figure 16;
  • Figure 18 is a partially exploded perspective view of the base of Figure 12;
  • Figure 19 is a further exploded perspective view of Figure 18.
  • Figure 20 is a perspective view of the seat of Figure 19 at another angle.
  • Figure 21 is a cross-sectional view taken along line A-A of Figure 1.
  • Figure 22 is a cross-sectional view taken along line B-B of Figure 5.
  • Figure 23 is a cross-sectional view taken along line C-C of Figure 5.
  • the present invention discloses a urea pump module 100 for mounting on the bottom of a urea tank.
  • the urea pump module 100 includes a base 1 and a pump assembly 2 mounted on the base 1. And a housing assembly 3 that is shielded on the pump assembly 2.
  • the housing assembly 3 includes a housing 31 and a first heating blanket 32 that abuts against the inside of the housing 31.
  • the housing 31 is provided with a top wall 311 and a cylindrical side wall 312.
  • the top wall 311 is provided with an opening 3111.
  • the opening 3111 can allow the urea solution to enter the urea pump module 100 when the urea liquid level is high; at the same time, the opening 3111 is also used to correspond to the ultrasonic probe to measure the urea liquid in the urea tank. Bit (detailed later).
  • the bottom of the side wall 312 is provided with a plurality of first cantilevers 3121 for fastening to the base 1.
  • Each of the first cantilevers 3121 is provided with a first slot 3122.
  • the side wall 312 is further disposed on both sides of each of the first cantilevers 3121.
  • the first slot 3123 is provided with a lower edge 3124 that extends downward through the lower edge 3124.
  • the first slot 3123 is V-shaped, and the first cantilever 3121 is trapezoidal. So, on the one hand, the first cantilever 3121 is formed by providing the first slot 3123; on the other hand, these first slots 3123 can enter the inlet port of the urea pump module 100 as a urea solution.
  • the first heating blanket 32 abuts against the inside of the side wall 312.
  • the housing 31 is made of a metallic material, and the first heating blanket 32 is a flexible heating element.
  • the flexible heating element can better achieve the bonding with the side wall 312, thereby facilitating the transfer of heat; in addition, the flexible heating element is simple in processing and can be made thinner, thereby saving cost; and, the flexible heating element It can better adapt to the vibration of the vehicle during driving and has good reliability.
  • the first heating blanket 32 surrounds the periphery of the pump assembly 2, such that, on the one hand, heat is transferred to the housing 31 by the first heating blanket 32.
  • the urea tank is heated; on the other hand, the urea surrounded by the first heating blanket 32 (including the urea remaining in the pump assembly 2) can also be heated in time to achieve rapid thawing.
  • the first heating blanket 32 is secured to the side wall 312 by a plurality of fastening elements 33.
  • the first heating blanket 32 is further provided with a plurality of notches 321 corresponding to the first cantilever 3121.
  • the base 1 is provided with a base 11 , a second heating blanket 12 laid on the base 11 , and a bottom cover 13 fixed to the lower side of the base 11 .
  • the seat body 11 is provided with a plate portion 111, an annular flange 112 that protrudes upward from the plate portion 111, and a boss portion 113 that protrudes downward from the plate portion 111.
  • the plate portion 111 is provided with an upper surface 1111 and a boss 1112 located in the upper surface 1111.
  • the boss 1112 is provided with a through hole 1113 communicating with the high pressure outlet of the pump assembly 2.
  • the base 1 is further provided with an annular groove 114 located outside the annular flange 112 for receiving the lower edge 3124 of the housing 31.
  • the outer surface of the annular flange 112 is provided with a plurality of first protrusions 1121 that are held in the vertical direction at the bottom of the first slot 3122.
  • the boss portion 113 is provided with a receiving cavity 115 and a urea outlet joint 116 communicating with the through hole 1113.
  • the base 1 is provided with an ultrasonic probe 117, a temperature sensor 118, and a pressure sensor 119 that are mounted in the housing chamber 115.
  • the ultrasonic probe 117 is aligned upward with the opening 3111 for detecting the liquid level of the urea solution.
  • the temperature sensor 118 also extends upward through the upper surface 1111 of the plate portion 111 for detecting the temperature of the urea solution.
  • the pressure sensor 119 is in communication with the urea outlet fitting 116 to detect an outlet pressure of the pump assembly 2.
  • the protrusion The outer surface of the portion 113 is further provided with a plurality of second protrusions 1131.
  • the second heating blanket 12 is laid on the upper surface 1111 to enable the urea in the pump assembly 2 to be heated and thawed upward.
  • the second heating blanket 12 surrounds the through hole 1113. This is provided to enable better heating of the urea at the outlet position of the pump assembly 2.
  • the second heating blanket 12 is a flexible heating element.
  • the pump assembly 2 is at least partially affixed to the boss 1112 to effect a seal.
  • the second heating blanket 12 surrounds the boss 1112.
  • the bottom cover 13 is provided with a circuit board 131, a receiving cavity 132 for accommodating the circuit board 131, and a waterproof ventilation cover 133 communicating with the receiving cavity 132. Since the electronic components on the circuit board 131 generate heat during operation, the air around them expands, and the waterproof venting cover 133 is provided to solve the problem of crushing the electronic components due to air expansion, and at the same time Waterproof effect.
  • the first heating blanket 32 and the second heating blanket 12 are both connected to the circuit board 131.
  • the bottom cover 13 is also provided with a plurality of second cantilevers 134.
  • Each of the second cantilevers 134 is provided with a second slot 135.
  • the bottom cover 13 is provided with a second slot 136 on each side of each of the second cantilevers 134.
  • the bottom cover 13 is provided with an upper edge 137, and the second slot 136 extends upward through the upper edge 137.
  • the second slot 136 is V-shaped, and the second cantilever 134 is trapezoidal.
  • the second protrusion 1131 is held in a vertical direction on the top of the second slot 135 to hold the bottom cover 13 and the base 11 together.
  • the pump assembly 2 includes a pump unit 21, a pump casing 22 that is shielded around the pump unit 21, a first filter 23 that surrounds the bottom of the pump unit 21, and A second filter 24 located at the periphery of the first filter 23.
  • the pump unit 21 includes a mounting plate 211, a urea pump 212 located at a lower portion of the mounting plate 211 and configured to deliver a urea solution to the urea outlet fitting 116, and located at the The upper portion of the plate 211 is mounted and used to drive the pump coil 213 of the urea pump 212.
  • the urea pump 212 may be a gear pump, a diaphragm pump, a plunger pump, or the like.
  • the urea pump 212 is a gear pump, such that the gear pump has a relatively large pump pressure; on the other hand, the reverse of the gear pump The transfer can achieve the evacuation of residual urea, reducing the risk of the system being frozen.
  • the pump coil 213 is connected to the circuit board 131.
  • the urea pump 212 is provided with a urea inlet 2121, a urea outlet, and a stud 2122 in communication with the urea outlet.
  • the boss 2122 is sleeved with a sealing ring 2123 to enable sealing after being inserted into the through hole 1113.
  • the first filter 23 surrounds the periphery of the urea pump 212 to filter impurities, and the urea inlet 2121 is located inside the first filter 23.
  • the first filter 23 includes a top wall 231, a bottom wall 232, an annular wall 233 between the top wall 231 and the bottom wall 232, and the top wall 231, the bottom wall 232, and the annular wall 233.
  • the top wall 231 abuts against the mounting plate 211.
  • the urea pump 212 is located in the receiving space 234, and the bottom wall 232 is provided with a through hole 2321 through which the stud 2122 passes.
  • the first filter 23 is a fine filter.
  • the second filter 24 is a coarse filter.
  • the second filter 24 is C-shaped to have a certain elasticity to facilitate installation.
  • the pump casing 22 is provided with a recess 221 for holding the second filter 24 and a plurality of communication holes 222 communicating with the first filter 23 and the second filter 24.
  • the communication hole 222 radially penetrates the pump casing 222.
  • the urea pump module 100 is mounted to the bottom of the urea tank.
  • the urea pump module 100 is mounted to the bottom of the urea tank.
  • the urea solution in the urea tank enters the interior of the urea pump module 100 through the first slot 3123 on the housing 31.
  • the urea solution can also enter the interior of the urea pump module 100 through the opening 3111 in the housing 31.
  • the urea solution enters the urea inlet 2121 of the urea pump 212 through the second filter 24, the communication hole 222, and the first filter 23.
  • the urea pump 212 After being pressurized by the urea pump 212, it is delivered to the urea outlet joint 116. Finally, the high pressure urea solution from the urea outlet connection 116 is delivered to the urea nozzle and injected into the exhaust of the engine through the urea nozzle to effect exhaust gas purification.

Abstract

一种用以安装于尿素箱底部的尿素泵模块，包括底座(1)、安装在底座（1）上的泵组件（2）以及遮罩在泵组件（2）上的壳体组件（3）。底座（1）内设有电路板（131）以及尿素出口接头（116）。泵组件（2）包括用以向尿素出口接头（116）输送尿素溶液的尿素泵以及用以驱动尿素泵（212）且与电路板（131）相连接的泵线圈（213）。壳体组件（3）包括壳体（31）及紧密贴靠在壳体（31）的内侧的第一加热毯（32）。壳体（31）由金属材料制成，壳体（31）设有让尿素溶液进入的第一开槽（3123）。第一加热毯（32）为柔性加热元件且与电路板（131）相连接。如此设置，便于第一加热毯（32）的安装，解决了对壳体（31）内外部的尿素进行加热的问题。

Description

尿素泵模块
本申请要求了申请日为2016年10月21日、申请号为201610916634.0、发明名称为“尿素泵模块”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种尿素泵模块，属于发动机尾气后处理技术领域。
背景技术
传统的尿素喷射系统包括设置在尿素箱外且通过尿素管进行连接的尿素泵模块。但是，这种设计会占用较大的空间，不利于整车安装。
后来，现有技术中出现了安装在尿素箱顶部的尿素泵模块。虽然这种设计节省了一些空间，但是由于尿素泵模块还是会向上凸出尿素箱，因此还是会占用一些空间。
为了更好地解决上述问题，现有技术中出现了安装在尿素箱底部的尿素泵模块。
由于浓度为32.5％的尿素溶液在低温环境下会因结冰而冻住，因此，如何实现快速的加热解冻就是本领域技术人员需要解决的技术问题。
发明内容
本发明的目的在于提供一种加热解冻效果较好的尿素泵模块。
为实现上述目的，本发明采用如下技术方案：一种用以安装于尿素箱底部的尿素泵模块，所述尿素泵模块包括底座、安装在所述底座上的泵组件以及遮罩在所述泵组件上的壳体组件，其中所述底座内设有电路板以及尿素出口接头，所述泵组件包括用以向所述尿素出口接头输送尿素溶液的尿素泵以及用以驱动所述尿素泵且与所述电路板相连接的泵线圈，所述壳体组件包括壳体及紧密贴靠在所述壳体的内侧的第一加热毯，所述壳体由金属材料制成，所述壳体设有让尿素溶液进入的第一开槽；所述第一加热毯为柔性加热元件且与所述电路板相连接。
作为本发明进一步改进的技术方案，所述壳体设有顶壁以及圆筒状的侧壁，所述顶壁设有开孔，所述第一加热毯紧密贴靠在所述侧壁的内侧。
作为本发明进一步改进的技术方案，所述第一加热毯通过若干固定元件固定到所述侧壁上。
作为本发明进一步改进的技术方案，所述侧壁的底部设有若干第一悬臂，每一个第一悬臂设有 第一狭槽；所述底座设有沿竖直方向卡持在所述第一狭槽的底部的若干第一凸起。
作为本发明进一步改进的技术方案，所述侧壁设有下边缘，所述底座设有收容所述下边缘的环形槽，所述第一开槽向下贯穿所述下边缘，每一个第一悬臂的两侧均设有所述第一开槽，所述第一悬臂均呈梯形。
作为本发明进一步改进的技术方案，所述底座设有座体、平铺在所述座体上的第二加热毯以及固定在所述座体的下方的底盖，其中所述座体设有板状部、向上凸出所述板状部的环形凸缘以及向下凸出所述板状部的凸起部，所述板状部设有上表面，所述第二加热毯平铺在所述上表面上且与所述电路板相连接。
作为本发明进一步改进的技术方案，所述板状部设有与所述尿素出口接头相连通的通孔，所述第二加热毯围绕在所述通孔的附近。
作为本发明进一步改进的技术方案，所述板状部的上表面设有一个凸台，所述通孔位于该凸台中；所述泵组件设有向下凸出的凸柱，所述凸柱插在所述通孔中。
作为本发明进一步改进的技术方案，所述泵组件至少部分贴合在所述凸台上，所述第二加热毯围绕所述凸台。
作为本发明进一步改进的技术方案，所述第一加热毯环绕在所述泵组件的外围，所述泵组件包括泵单元、遮罩在所述泵单元外围的泵罩壳、环绕在所述泵单元底部的第一过滤器以及位于所述第一过滤器外围的第二过滤器。
相较于现有技术，本发明的第一加热毯为柔性加热元件，如此设置，能够使其紧密贴靠在所述壳体的内侧，提高热量传递的效果；另一方面，第一加热毯环绕在泵组件的外围，解决了对壳体内部的尿素进行加热的问题。
附图说明
图1是本发明尿素泵模块的立体示意图。
图2是图1另一角度的立体示意图。
图3是图1的主视图。
图4是图1的后视图。
图5是图1的俯视图。
图6是图1的仰视图。
图7是图1的左视图。
图8是图1的右视图。
图9是图1的部分立体分解图，其中壳体组件被分离出来。
图10是图9中壳体组件另一角度的立体图。
图11是图10的立体分解图。
图12是去除图9中的壳体组件后进一步的立体分解图。
图13是图12另一角度的立体分解图。
图14是图13中泵组件的部分立体分解图。
图15是图14进一步的立体分解图。
图16是图15另一角度的立体分解图。
图17是图16另一角度的立体分解图。
图18是图12中底座的部分立体分解图。
图19是图18进一步的立体分解图。
图20是图19中的座体于另一角度的立体示意图。
图21是沿图1中A-A线的剖面示意图。
图22是沿图5中B-B线的剖面示意图。
图23是沿图5中C-C线的剖面示意图。
具体实施方式
请参图1至图23所示，本发明揭示了一种用以安装于尿素箱底部的尿素泵模块100，所述尿素泵模块100包括底座1、安装在所述底座1上的泵组件2以及遮罩在所述泵组件2上的壳体组件3。
请参图9至图11所示，所述壳体组件3包括壳体31及紧密贴靠在所述壳体31的内侧的第一加热毯32。在本发明图示的实施方式中，所述壳体31设有顶壁311以及圆筒状的侧壁312。所述顶壁311设有开孔3111。所述开孔3111在尿素液位较高时能够让尿素溶液进入所述尿素泵模块100中；同时，所述开孔3111还用以与超声波探头相对应，用以测量尿素箱中的尿素液位(容后详述)。所述侧壁312的底部设有用以与所述底座1相扣接的若干第一悬臂3121。每一个第一悬臂3121设有第一狭槽3122。另外，所述侧壁312还设有位于每一个第一悬臂3121的两侧 的第一开槽3123。所述侧壁312设有下边缘3124，所述第一开槽3123向下贯穿所述下边缘3124。在本发明图示的实施方式中，所述第一开槽3123呈V形，所述第一悬臂3121均呈梯形。如此设置，一方面，通过设置第一开槽3123来形成第一悬臂3121；另一方面，这些第一开槽3123能够作为尿素溶液进入所述尿素泵模块100的进入口。
所述第一加热毯32紧密贴靠在所述侧壁312的内侧。在本发明图示的实施方式中，所述壳体31由金属材料制成，所述第一加热毯32为柔性加热元件。如此设置，柔性加热元件能够更好的实现与侧壁312的贴合，从而有利于热量的传递；另外，柔性加热元件加工工艺简单且能够制作得较薄，从而节省成本；并且，柔性加热元件能够较好的适应车辆在行驶过程中的震动，可靠性较好。在本发明图示的实施方式中，所述第一加热毯32环绕在所述泵组件2的外围，如此设置，一方面，通过第一加热毯32把热量传递到壳体31上，能够实现对尿素箱进行加热；另一方面，被第一加热毯32所包围的尿素(包括残留在所述泵组件2中的尿素)也能够被及时加热，从而实现快速解冻。
在本发明图示的实施方式中，所述第一加热毯32通过若干固定元件33固定到所述侧壁312上。为了让位，所述第一加热毯32还设有对应于所述第一悬臂3121的若干缺口321。
请参图12至图20所示，所述底座1设有座体11、平铺在所述座体11上的第二加热毯12以及固定在所述座体11的下方的底盖13，其中所述座体11设有板状部111、向上凸出所述板状部111的环形凸缘112以及向下凸出所述板状部111的凸起部113。
所述板状部111设有上表面1111以及位于所述上表面1111内的凸台1112。所述凸台1112设有与所述泵组件2的高压出口相连通的通孔1113。
所述底座1还设有位于所述环形凸缘112的外部且用以收容所述壳体31的下边缘3124的环形槽114。所述环形凸缘112的外表面设有沿竖直方向卡持在所述第一狭槽3122的底部的若干第一凸起1121。
所述凸起部113设有容纳腔115以及与所述通孔1113相连通的尿素出口接头116。所述底座1设有安装在所述容纳腔115中的超声波探头117、温度传感器118以及压力传感器119。所述超声波探头117向上与所述开孔3111对齐，用以检测尿素溶液的液面高度。所述温度传感器118也向上贯穿所述板状部111的上表面1111，用以检测尿素溶液的温度。所述压力传感器119与所述尿素出口接头116相连通以检测所述泵组件2的出口压力。另外，请参图20所示，所述凸起 部113的外表面还设有若干第二凸起1131。
所述第二加热毯12平铺在所述上表面1111上，以能够向上对泵组件2内的尿素进行加热解冻。所述第二加热毯12围绕在所述通孔1113的附近。如此设置，以能够更好地对所述泵组件2的出口位置处的尿素进行加热。优选地，所述第二加热毯12是柔性加热元件。在本发明图示的实施方式中，所述泵组件2至少部分贴合在所述凸台1112上，以实现密封。所述第二加热毯12围绕所述凸台1112。
所述底盖13设有电路板131、容纳所述电路板131的收容腔132以及与所述收容腔132连通的防水透气盖133。由于电路板131上的电子元器件在工作时会发热，导致其周围的空气膨胀，通过设置所述防水透气盖133很好的解决了因空气膨胀而压坏电子元器件的问题，同时也能起到防水的功效。
所述第一加热毯32以及所述第二加热毯12均与所述电路板131相连接。此外，所述底盖13还设有若干第二悬臂134。每一个第二悬臂134设有第二狭槽135。所述底盖13设有位于每一个第二悬臂134的两侧的第二开槽136。所述底盖13设有上边缘137，所述第二开槽136向上贯穿所述上边缘137。在本发明图示的实施方式中，所述第二开槽136呈V形，所述第二悬臂134均呈梯形。所述第二凸起1131沿竖直方向卡持在所述第二狭槽135的顶部，以将所述底盖13与所述座体11扣持在一起。
请参图13至图17所示，所述泵组件2包括泵单元21、遮罩在所述泵单元21外围的泵罩壳22、环绕在所述泵单元21底部的第一过滤器23以及位于所述第一过滤器23外围的第二过滤器24。在本发明图示的实施方式中，所述泵单元21包括安装板211、位于所述安装板211的下部且用以向所述尿素出口接头116输送尿素溶液的尿素泵212、以及位于所述安装板211的上部且用以驱动所述尿素泵212的泵线圈213。所述尿素泵212可以是齿轮泵、膜片泵、柱塞泵等。请参图21所示，在本发明图示的实施方式中，所述尿素泵212为齿轮泵，如此设置，一方面齿轮泵具备相对较大的泵压力；另一方面，通过齿轮泵的反转能够实现对残留尿素的抽空，降低系统被冻坏的风险。所述泵线圈213与所述电路板131相连接。所述尿素泵212设有尿素进口2121、尿素出口以及与所述尿素出口相连通的凸柱2122。所述凸柱2122上套有密封圈2123，以在插入所述通孔1113后能够实现密封。所述第一过滤器23环绕在所述尿素泵212的外围以过滤杂质，所述尿素进口2121位于所述第一过滤器23的内部。
所述第一过滤器23包括顶壁231、底壁232、位于所述顶壁231与所述底壁232之间的环形壁233以及由所述顶壁231、底壁232以及环形壁233所围成的收容空间234，其中所述顶壁231设有供所述尿素泵212穿过的开口2311。所述顶壁231抵靠所述安装板211。所述尿素泵212位于所述收容空间234中，所述底壁232设有供所述凸柱2122穿过的穿孔2321。在本发明图示的实施方式中，所述第一过滤器23为精滤过滤器。
在本发明图示的实施方式中，所述第二过滤器24为粗滤过滤器。所述第二过滤器24呈C形，以具备一定的弹性，从而便于安装。
所述泵罩壳22设有用以卡持所述第二过滤器24的凹陷221以及连通所述第一过滤器23与所述第二过滤器24的若干连通孔222。所述连通孔222径向贯穿所述泵罩壳222。
使用时，将所述尿素泵模块100安装到尿素箱底部。优选地，将所述尿素泵模块100安装到尿素箱的底部。尿素箱中的尿素溶液通过壳体31上的第一开槽3123进入到尿素泵模块100的内部。当然，在尿素溶液的液面足够高时，尿素溶液还可以通过壳体31上的开孔3111进入到尿素泵模块100的内部。然后，尿素溶液经过第二过滤器24、连通孔222以及第一过滤器23进入到尿素泵212的尿素进口2121中。再通过尿素泵212加压之后，输送到尿素出口接头116。最后，从尿素出口接头116出来的高压尿素溶液被输送到尿素喷嘴，并通过尿素喷嘴喷射到发动机的尾气中，从而实现尾气净化。
另外，以上实施例仅用于说明本发明而并非限制本发明所描述的技术方案，对本说明书的理解应该以所属技术领域的技术人员为基础，尽管本说明书参照上述的实施例对本发明已进行了详细的说明，但是，本领域的普通技术人员应当理解，所属技术领域的技术人员仍然可以对本发明进行修改或者等同替换，而一切不脱离本发明的精神和范围的技术方案及其改进，均应涵盖在本发明的权利要求范围内。

Claims (10)

  1. 一种用以安装于尿素箱底部的尿素泵模块，所述尿素泵模块包括底座、安装在所述底座上的泵组件以及遮罩在所述泵组件上的壳体组件，其中所述底座内设有电路板以及尿素出口接头，所述泵组件包括用以向所述尿素出口接头输送尿素溶液的尿素泵以及用以驱动所述尿素泵且与所述电路板相连接的泵线圈，其特征在于：所述壳体组件包括壳体及紧密贴靠在所述壳体的内侧的第一加热毯，所述壳体由金属材料制成，所述壳体设有让尿素溶液进入的第一开槽；所述第一加热毯为柔性加热元件且与所述电路板相连接。
  2. 如权利要求1所述的尿素泵模块，其特征在于：所述壳体设有顶壁以及圆筒状的侧壁，所述顶壁设有开孔，所述第一加热毯紧密贴靠在所述侧壁的内侧。
  3. 如权利要求2所述的尿素泵模块，其特征在于：所述第一加热毯通过若干固定元件固定到所述侧壁上。
  4. 如权利要求2所述的尿素泵模块，其特征在于：所述侧壁的底部设有若干第一悬臂，每一个第一悬臂设有第一狭槽；所述底座设有沿竖直方向卡持在所述第一狭槽的底部的若干第一凸起。
  5. 如权利要求4所述的尿素泵模块，其特征在于：所述侧壁设有下边缘，所述底座设有收容所述下边缘的环形槽，所述第一开槽向下贯穿所述下边缘，每一个第一悬臂的两侧均设有所述第一开槽，所述第一悬臂均呈梯形。
  6. 如权利要求1所述的尿素泵模块，其特征在于：所述底座设有座体、平铺在所述座体上的第二加热毯以及固定在所述座体的下方的底盖，其中所述座体设有板状部、向上凸出所述板状部的环形凸缘以及向下凸出所述板状部的凸起部，所述板状部设有上表面，所述第二加热毯平铺在所述上表面上且与所述电路板相连接。
  7. 如权利要求6所述的尿素泵模块，其特征在于：所述板状部设有与所述尿素出口接头相连通的通孔，所述第二加热毯围绕在所述通孔的附近。
  8. 如权利要求7所述的尿素泵模块，其特征在于：所述板状部的上表面设有一个凸台，所述通孔位于该凸台中；所述泵组件设有向下凸出的凸柱，所述凸柱插在所述通孔中。
  9. 如权利要求8所述的尿素泵模块，其特征在于：所述泵组件至少部分贴合在所述凸台上，所述第二加热毯围绕所述凸台。
  10. 如权利要求1所述的尿素泵模块，其特征在于：所述第一加热毯环绕在所述泵组件的外围，所述泵组件包括泵单元、遮罩在所述泵单元外围的泵罩壳、环绕在所述泵单元底部的第一过滤器以及位于所述第一过滤器外围的第二过滤器。
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