Urea heating device and filter

Abstract

The urea heating device comprises a shell assembly, a heating assembly and a first glue sealing unit, the shell assembly forms a containing cavity for containing the heating assembly through a shell body and an upper cover, one end of the heating assembly penetrates through the containing cavity and extends downwards into a filter body, and the other end of the heating assembly extends downwards into the filter body. The urea solution in the filter body can be heated, so that the urea solution is in a proper temperature range. A first sealing element is arranged in the first sealing groove and can be matched with the pressing plate to seal the heating assembly, and the urea solution is prevented from entering the containing cavity. The first sealing element is contained and limited in the first sealing groove, so that the first sealing element is effectively prevented from deviating and slipping under the action of pressure. Through the combined action of the shell assembly and the heating assembly, a urea solution in the filter can be heated, the urea solution is prevented from being frozen, expanded and damaged, and the urea filter can be normally used in cold weather.

Description

Technical Field

[0001] The utility model belongs to the technical field of urea filter heating, and in particular relates to a urea heating device and a filter. Background Art

[0002] In order to make the nitrogen oxide content in diesel engine exhaust meet the emission requirements, the prior art uses selective catalytic reduction technology (SCR) to treat the exhaust, that is, using urea solution as a reducing agent, spraying it into the exhaust pipe after atomization, and the urea solution and the nitrogen oxides in the exhaust gas generate nitrogen and water under the action of the catalyst, which are discharged from the exhaust pipe, thereby achieving the purpose of emission reduction. However, the urea filter in the prior art has limitations in use. In a low temperature environment, the urea solution will crystallize, causing the atomization injection equipment to be blocked, and when the temperature is too low, the urea solution will freeze and expand, causing cracks in the urea filter housing, resulting in leakage of the urea solution. Utility Model Content

[0003] The utility model provides a urea heating device and a filter, aiming to solve the problem in the prior art that the urea filter is easily damaged by urea solution freezing at low temperature.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] In a first aspect, the utility model provides a urea heating device, comprising:

[0006] A housing assembly, comprising a housing body and an upper cover, wherein the housing body has a receiving cavity, a mounting opening is provided at the top of the receiving cavity, the upper cover is arranged on the mounting opening, an annular first sealing groove is provided on the inner wall of the receiving cavity, and a first sealing element is provided in the first sealing groove; and

[0007] The heating component has one end accommodated in the accommodating cavity and the other end extending downward through the bottom of the shell. The portion of the heating component accommodated in the accommodating cavity is provided with a pressure plate. The first sealing groove is arranged around the heating component, and the pressure plate abuts against the first sealing element.

[0008] In a possible implementation, the urea heating device further includes a first glue sealing unit, which is disposed in the accommodating cavity and wraps around a portion of the heating component accommodated in the accommodating cavity.

[0009] In a possible implementation manner, a connecting column is provided on a side of the upper cover adjacent to the accommodating cavity, and the first sealing unit is at least partially wrapped around the connecting column.

[0010] In a possible implementation manner, a connecting hole is formed on a side wall of the connecting column, and the first sealing unit is filled in the connecting hole.

[0011] In a possible implementation, a second sealing groove is formed at the bottom of the housing body around the heat generating component, a second glue sealing unit is provided in the second sealing groove, and the heat generating component passes through the second glue sealing unit.

[0012] In a possible implementation manner, a second sealing element is provided on the outer periphery of the housing body.

[0013] In a possible implementation, the heat generating component includes:

[0014] A protective shell, one end of which is accommodated in the accommodating cavity and the other end of which passes through the shell body;

[0015] a heating element disposed in the protective shell; and

[0016] The electrode is disposed in the protective shell and electrically connected to the heating element.

[0017] In a possible implementation, a plurality of the heating elements are provided, and the plurality of the heating elements are arranged along the length direction of the protective shell, and the operating temperatures of the plurality of the heating elements increase gradually in a direction away from the shell body.

[0018] In a possible implementation, a mounting portion is provided on the shell body, and a mounting hole is opened in the mounting portion.

[0019] Compared with the prior art, the beneficial effects of the urea heating device provided by the utility model are:

[0020] The urea heating device provided by the utility model includes a shell assembly and a heating assembly. The shell assembly forms a receiving cavity for accommodating the heating assembly through the shell body and the upper cover. One end of the heating assembly passes through the receiving cavity and extends downward into the filter body, which can heat the urea solution in the filter body to keep it in a suitable temperature range. A first sealing element is provided in the first sealing groove, which can seal the heating assembly in cooperation with the pressure plate to prevent the urea solution from entering the receiving cavity. The first sealing element is accommodated and limited in the first sealing groove, which effectively prevents the first seal from shifting and slipping under pressure. The utility model can heat the urea solution in the filter through the joint action of the shell assembly and the heating assembly to prevent it from freezing, expanding and being damaged, so that the urea filter can be used normally in cold weather.

[0021] In a second aspect, the utility model provides a filter, comprising:

[0022] a filter body; and

[0023] In the urea heating device as described in any of the above implementations, the shell body is connected to the filter body, and the heating component extends into the filter body.

[0024] The filter provided by the utility model adopts the urea heating device described in any of the above-mentioned implementation methods, and has the same technical effects as the urea heating device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a urea heating device provided in one embodiment of the utility model Figure 1 ;

[0026] Figure 2 A schematic diagram of the structure of a urea heating device provided in one embodiment of the utility model Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the structure of a heating component in one embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the housing body in one embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the upper cover in one embodiment of the utility model;

[0030] Figure 6 A partial cross-sectional view of a filter provided in one embodiment of the utility model;

[0031] Figure 7 This is a schematic structural diagram of a filter provided in one embodiment of the utility model.

[0032] Description of reference numerals:

[0033] 1. Urea heating device; 10. Shell assembly; 11. Shell body; 111. First sealing groove; 112. First sealing element; 113. Mounting portion; 1131. Mounting hole; 12. Upper cover; 121. Exhaust groove; 122. Connecting column; 123. Connecting hole; 13. Second sealing element; 20. Heating assembly; 21. Protective shell; 211. Pressing plate; 22. Heating element; 23. Electrode; 30. First glue sealing unit; 40. Second glue sealing unit; 50. Connecting wire; 2. Filter; 60. Filter body; DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to", "fixed" or "fixedly disposed" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" or "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "set to" or "disposed on" another element, it may be directly on the other element or there may be a central element. "Multiple" refers to two or more quantities. "At least one" refers to one or more quantities. "Several" refers to one or more quantities.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0037] Please also read Figures 1 to 7 The urea heating device 1 and the filter 2 provided in the embodiment of the utility model are described below.

[0038] See also Figures 1 to 6 The embodiment of the utility model provides a urea heating device 1, including a shell component 10 and a heating component 20. The shell component 10 includes a shell body 11 and an upper cover 12. The shell body 11 has a accommodating cavity, a mounting opening is provided at the top of the accommodating cavity, and the upper cover 12 is covered on the mounting opening. An annular first sealing groove 111 is provided on the inner wall of the accommodating cavity, and a first sealing element 112 is provided in the first sealing groove 111; one end of the heating component 20 is accommodated in the accommodating cavity, and the other end extends downward through the bottom of the shell. A pressing plate 211 is provided on the portion of the heating component 20 accommodated in the accommodating cavity. The first sealing groove 111 is arranged around the heating component 20, and the pressing plate 211 abuts against the first sealing element 112.

[0039] Compared with the prior art, the urea heating device 1 provided in the embodiment of the utility model has the following beneficial effects:

[0040] The urea heating device 1 provided by the embodiment of the utility model includes a housing component 10 and a heating component 20. The housing component 10 forms a receiving cavity for accommodating the heating component 20 through the housing body 11 and the upper cover 12. One end of the heating component 20 extends downward through the receiving cavity into the filter body, and can heat the urea solution in the filter body to keep it in a suitable temperature range. A first sealing element 112 is provided in the first sealing groove 111, and can seal the heating component 20 in cooperation with the pressure plate 211 to prevent the urea solution from entering the receiving cavity. The first sealing element 112 is accommodated and limited in the first sealing groove 111, which effectively prevents the first seal from deflecting and slipping under pressure. The utility model can heat the urea solution in the filter through the joint action of the housing component 10 and the heating component 20 to prevent it from freezing, expanding and being damaged, so that the urea filter can be used normally in cold weather.

[0041] In the embodiment of the utility model, a first sealing element 112 is provided in the first sealing groove 111, and can seal the heating component 20 in cooperation with the pressure plate 211. The first sealing element 112 is contained and limited in the first sealing groove 111, effectively preventing the first sealing member from deflecting and slipping under pressure. The first sealing element 112 can be a sealant formed by pouring glue in the first sealing groove 111, or the first sealing element 112 can also be a sealing ring. There is no restriction on the cross-sectional shape of the first sealing element 112, and it can be a circular cross-section or other shapes, as long as the compression design of the seal is met.

[0042] When in use, the heating component 20 extends into the clean liquid cavity of the filter body 60. In the prior art, there is a technology that uses sealant to seal the mating surface of the heating component 20 and the shell body 11. However, during the operation of the heating component 20, heat will gradually transfer to the upper part and the surrounding area. Since the heat is conducted upward faster, more heat is accumulated in the upper part. The sealant located in the upper part is prone to cracking under the impact of cold and heat, and urea solution may enter the accommodating cavity. In order to solve the above problems, this embodiment cooperates with the first sealing element 112 by using the pressure plate 211 to solve the problem of poor sealing of the heating component 20 in the prior art by using sealant.

[0043] In the embodiment of the utility model, the shell body 11 and the upper cover 12 can be made of plastic material, obtained by injection molding, or can be made of metal material, obtained by metal cutting technology. The shell body 11 is a hollow shell structure, and at least one side of the shell body 11 is formed with an opening for loading components such as the heating component 20. The heating component 20 and other components can be fixed in the shell body 11 by bonding, screw connection, etc. The heating component 20 is provided with a connecting wire 50, which passes through the shell body 11 or the upper cover 12 and is connected to a battery or other power supply unit.

[0044] In the embodiment of the utility model, the heating component 20 can generate heat when powered on, and heat the urea solution in the filter body 60 to prevent it from freezing in a low temperature environment. The heating component 20 can be an electric heating device such as an electric heating rod, an electric heating wire, a PTC heating element, etc. The heating component 20 is connected to a power supply unit through a connecting wire 50, and the power supply unit can be a vehicle-mounted battery, or an external DC power supply or AC power supply.

[0045] See also Figures 1 to 6 In some possible embodiments, the upper cover is provided with an exhaust groove, which is communicated with the accommodating cavity. The urea heating device further includes a first adhesive sealing unit, which is disposed in the accommodating cavity and wraps around a portion of the heating component accommodated in the accommodating cavity.

[0046] In this embodiment, the first glue sealing unit 30 is arranged in the accommodating cavity, and can wrap the heating component 20 accommodated in the accommodating cavity, play a role in waterproofing and moisture-proofing, and prevent the internal electronic components from short-circuiting when encountering water. By providing the first glue sealing unit 30, the waterproof ability of the urea heating device 1 is greatly improved. By providing the exhaust groove 121 in the upper cover 12, the air in the shell body 11 can be discharged through the exhaust groove 121 when the sealant is poured into the accommodating cavity, so that the sealant can better fill the accommodating cavity, and can prevent the electronic components in the accommodating cavity from contacting the urea solution, which helps to improve the sealing protection level of the product.

[0047] After the internal components are installed, the upper cover 12 is buckled on the opening of the accommodating cavity. The upper cover 12 and the shell body 11 can be connected as a whole by screw connection, welding, riveting, bonding, etc. Then, the sealant is poured into the accommodating cavity, and the first seal unit 30 is formed after the sealant is cured. The exhaust groove 121 can be round, square, etc., and the exhaust groove 121 is generally located at the top.

[0048] See also Figure 5 and Figure 6 In some possible embodiments, a connection column 122 is provided on one side of the upper cover 12 adjacent to the accommodating cavity, and the first adhesive sealing unit 30 is at least partially wrapped in the connection column 122, so that the upper cover 12 and the first adhesive sealing unit 30 are connected as a whole, thereby improving the installation strength of the upper cover 12. In order to further improve the connection strength between the connection column 122 and the first adhesive sealing unit 30, a depression and a protrusion may be provided on the connection column 122.

[0049] See also Figure 5 In some possible embodiments, a connecting hole 123 is opened on the side wall of the connecting column 122, and the first sealing unit 30 is filled in the connecting hole 123 to prevent it from falling off. The connecting hole 123 can be a through hole or a blind hole, and one or more holes can be set as needed.

[0050] See also Figure 6In some possible embodiments, a second sealing groove is opened at the bottom of the shell body 11 around the heating component 20, and a second glue sealing unit 40 is arranged in the second sealing groove. The heating component 20 passes through the second glue sealing unit 40. The second glue sealing unit 40 is also formed by sealing glue, which can seal the mating surface between the heating component 20 and the shell body 11 to improve the sealing effect.

[0051] See also Figure 1 and Figure 6 In some possible embodiments, a second sealing element 13 is provided on the outer periphery of the housing body 11, and the second sealing element 13 is tightly matched with the mounting hole 1131 on the filter body 60 to achieve sealing. The second sealing element 13 may be an O-ring, etc., and one or more may be provided as required. When multiple second sealing elements 13 are provided, the multiple second sealing elements 13 are spaced apart in the axial direction.

[0052] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 In some possible embodiments, the heating component 20 includes a protective shell 21, a heating element 22 and an electrode 23. The electrode 23 is connected to a power source via a connecting wire 50. One end of the protective shell 21 is accommodated in the accommodating cavity, and the other end passes through the shell body 11. The heating element 22 is disposed in the protective shell 21. The electrode 23 is disposed in the protective shell 21 and is electrically connected to the heating element 22.

[0053] In this embodiment, the heating component 20 is composed of a protective shell 21, a heating element 22 and an electrode 23. The heating element 22 may be a PTC element. The protective shell 21 is made of metal, does not react with the urea solution, and has good thermal conductivity. The PTC element and the electrode 23 are isolated from the protective shell 21 by insulating materials.

[0054] In this embodiment, the heating element 22 uses a PTC element. Based on the inherent characteristics of PTC, it can achieve power reduction heating at high temperatures. Compared with the commonly used resistance alloy wire heating, it is safer and more reliable, and prevents urea from overheating and decomposition. Unlike the usual PTC heater, since the heating medium is urea, the protective shell 21 is made of stainless steel that does not react with urea, or other suitable materials. A pressing plate 211 is provided on the protective shell 21, and the pressing plate 211 and the protective shell 21 can be made into an integral structure or a split structure, and assembled together by welding, bonding or other processes.

[0055] like Figure 4As shown, a limiting through hole is provided at the bottom of the shell body 11, and the limiting through hole is consistent in shape with the protective shell 21, and is used for the protective shell 21 to pass through. A threaded hole is provided on the bottom wall of the accommodating cavity to fix the pressure plate 211 in the installation position, and the threaded holes are located on both sides of the limiting through hole. After the screws are tightened, the pressure plate 211 can press the first sealing element 112. There are multiple screws to ensure that the force around the first sealing element 112 is uniform and effective sealing is achieved. The number of threaded holes corresponds to the number of screws, and more screws and threaded holes can be set if the space size allows.

[0056] After the connecting wire 50 is connected to the heating component 20, it passes through the wire hole on the housing body 11 to realize power supply connection with the outside. The first sealing unit 30 can seal and fix each component and the exposed part of the circuit in the accommodating cavity.

[0057] Considering that heat will transfer upward, in order to achieve regional temperature control heating and prevent the urea solution in the upper position from overheating, please refer to Figure 6 In some possible embodiments, a plurality of heating elements 22 are provided, and the plurality of heating elements 22 are arranged along the length direction of the protective shell 21, and the operating temperatures of the plurality of heating elements 22 increase in a direction away from the shell body 11. Optionally, the operating temperature of the heating element 22 can be controlled by the temperature adjustment function of the heating element 22 itself, or by its own heating power.

[0058] In this embodiment, the plurality of heating elements 22 are PTC elements with different temperature parameters. The PTC element with a higher heating temperature is arranged at the lower part, which can increase the heating temperature of the lower part of the heating component 20 and accelerate the melting of the urea at the lower position. The PTC element with a lower heating temperature is arranged at the upper part, which can reduce the heating temperature of the upper part of the heating component 20, realize regional temperature control heating, and avoid overheating of urea around the upper position. In order to distinguish the PTC elements with different temperature parameters during assembly, different sizes and shapes can be used. Of course, the plurality of PTC elements can also adopt the same size and shape, which is not limited in this embodiment.

[0059] See also Figure 1 and Figure 2 In some possible embodiments, a mounting portion 113 is provided on the shell body 11, and the mounting portion 113 may be an ear plate. The mounting portion 113 is provided with a mounting hole 1131, and a bolt is provided in the mounting hole 1131 for connecting the shell body 11 and the filter body 60 as a whole.

[0060] See also Figure 6 and Figure 7In the second aspect, the embodiment of the utility model provides a filter 2, including a filter body 60 and a urea heating device 1 as provided in any of the above embodiments, the housing body 11 is connected to the filter body 60, and the heating component 20 extends into the filter body 60. The filter body 60 can be a urea filter 2 product in the prior art, and the heating component 20 extends into the filter body 60, which can heat the urea solution to prevent it from freezing.

[0061] It can be understood that the various parts in the above-mentioned embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the utility model specification has recorded various combination embodiments and can support different combination embodiments.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Urea heating device, characterized in that: include: A housing assembly, comprising a housing body and an upper cover, wherein the housing body has a receiving cavity, a mounting opening is provided at the top of the receiving cavity, the upper cover is arranged on the mounting opening, an annular first sealing groove is provided on the inner wall of the receiving cavity, and a first sealing element is provided in the first sealing groove; and The heating component has one end accommodated in the accommodating cavity and the other end extending downward through the bottom of the shell. The portion of the heating component accommodated in the accommodating cavity is provided with a pressure plate. The first sealing groove is arranged around the heating component, and the pressure plate abuts against the first sealing element.

2. The urea heating device according to claim 1, characterized in that: The upper cover is provided with an exhaust groove which is communicated with the accommodating cavity. The urea heating device further comprises a first adhesive sealing unit which is arranged in the accommodating cavity and wraps around the portion of the heating component accommodated in the accommodating cavity.

3. The urea heating device according to claim 2, characterized in that: A connecting column is provided on one side of the upper cover adjacent to the accommodating cavity, and the first sealing unit is at least partially wrapped around the connecting column.

4. The urea heating device according to claim 3, characterized in that: A connecting hole is formed on the side wall of the connecting column, and the first sealing unit is filled in the connecting hole.

5. The urea heating device according to claim 1, characterized in that: A second sealing groove is formed at the bottom of the shell body around the heating component, a second glue sealing unit is formed in the second sealing groove, and the heating component passes through the second glue sealing unit.

6. The urea heating device according to claim 1, characterized in that: A second sealing element is disposed on the outer periphery of the housing body.

7. The urea heating device according to claim 1, characterized in that: The heating component comprises: A protective shell, one end of which is accommodated in the accommodating cavity and the other end of which passes through the shell body; a heating element disposed in the protective shell; and The electrode is disposed in the protective shell and electrically connected to the heating element.

8. The urea heating device according to claim 7, characterized in that: There are multiple heating elements, and the multiple heating elements are arranged along the length direction of the protective shell. The working temperatures of the multiple heating elements increase in the direction away from the shell body.

9. The urea heating device according to claim 8, characterized in that: The shell body is provided with a mounting portion, and the mounting portion is provided with a mounting hole.

10. A filter, characterized in that: include: Filter body; as well as According to the urea heating device as described in any one of claims 1 to 9, the shell body is connected to the filter body, and the heating component extends into the filter body.

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