KR101739473B1 - Heating apparatus of urea water solution - Google Patents

Heating apparatus of urea water solution Download PDF

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Publication number
KR101739473B1
KR101739473B1 KR1020160013900A KR20160013900A KR101739473B1 KR 101739473 B1 KR101739473 B1 KR 101739473B1 KR 1020160013900 A KR1020160013900 A KR 1020160013900A KR 20160013900 A KR20160013900 A KR 20160013900A KR 101739473 B1 KR101739473 B1 KR 101739473B1
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KR
South Korea
Prior art keywords
heat
assembly
heating casing
urea
urea tank
Prior art date
Application number
KR1020160013900A
Other languages
Korean (ko)
Inventor
유성용
Original Assignee
(주)애드테크
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Priority to KR1020160013900A priority Critical patent/KR101739473B1/en
Application granted granted Critical
Publication of KR101739473B1 publication Critical patent/KR101739473B1/en

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    • 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
    • F01N3/2896—Liquid catalyst carrier
    • 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
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • 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
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs

Abstract

The present invention relates to a heating apparatus of a urea tank, comprising: a positive thermal coefficient (PTC) assembly heated when receiving external power; a heating casing receiving the PTC assembly made of a thermally conductive material, and installed in the urea tank storing urea water to transfer heat to the urea water; and a radiating material installed inside the heating casing to transfer heat generated from the PTC assembly to the heating casing. In comparison with an existing technology, the urea water stored in the urea tank is heated or defrosted using a PTC device such that heat transfer rate is increased. As the heat of the PTC assembly is maximally transferred to the heating casing while the PTC assembly including the PTC device is mounted in the heating casing, a heat loss is able to be reduced. Moreover, the heat casing is made of an anti-corrosive material, thus durability being able to be improved.

Description

[0001] HEATING APPARATUS OF UREA WATER SOLUTION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heating apparatus for a urea tank, and more particularly, to a heating apparatus for a urea tank. More particularly, the present invention relates to a heating apparatus for a urea tank, The heat casing can be reduced in heat loss by allowing the heat of the Pittsi assembly to be transmitted to the heating casing as much as possible while mounting the PTFE assembly including the PTFE assembly on the heating casing and the urea tank And more particularly to a heating device.

In view of the fact that the exhaust gas discharged from the diesel engine contains nitrogen oxide (hereinafter referred to as NOx) which causes serious air pollution, a catalytic reduction method for removing NOx is used.

To this end, a Diesel Particulate Filter (DOC) or a Diesel Particulate Filter (DOC), which is a kind of exhaust gas post-treatment device for physically collecting and burning PM (particulate matter) A selective catalytic reduction (SCR) catalyst is continuously installed to remove the catalyst effectively.

This SCR catalyst system is a system capable of effectively reducing NOx by injecting urea (Urea, urea), which is a reducing agent, into the SCR catalyst. The urea in the urea tank is pumped into the SCR catalyst inlet When supplied to a urea dosing module, which is a kind of injector mounted, the urea dosing unit injects urea into the SCR catalyst to reduce NOx.

That is, in the SCR catalyst system, the urea injected into the exhaust pipe is pyrolyzed by heat in the exhaust pipe or in contact with the SCR catalyst to be catalytically decomposed so that one molecule of the element is converted into two molecules of ammonia. The converted ammonia is converted into nitrogen oxide And SCR (Selective Catalyst Reduction) reaction of the reaction product, thereby discharging harmless nitrogen and water, which are the products of the reaction, to the outside.

Since urea used in such an SCR system is not so low in freezing point (about -11 째 C), the urea in the urea tank does not circulate smoothly to the dosing unit at low temperature icing (ICING) There is an urgent need to improve operability.

As a conventional method for improving the low temperature operation performance of urea, a method of installing a resistance heater around a pump mounted on a urea tank or providing a resistance heater in a channel from a pump to an SCR catalyst to prevent freezing of urea has been applied . Alternatively, as another conventional method, a cooling water inflow path is provided in the urea tank, and the urea in the urea tank is melted by heating the engine cooling water. Alternatively, as another conventional method, a method of melting a urea frozen by adopting a hot-wire heater in a urea tank is used.

BACKGROUND ART [0002] The background art of the present invention has been proposed in Korean Patent Registration No. 0839949 (entitled " Dosing System, Registered on June 20, 2008).

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

The conventional urea tank heating device is required to circulate the cooling water sufficiently heated by the engine to the urea tank when the cooling water discharged from the engine is circulated to the urea tank so that the urea aqueous solution can not be melted by the cooling water at the initial stage of the engine start, So that the installation structure for circulating the cooling water is complicated and the installation cost is increased.

Therefore, there is a need to improve this.

SUMMARY OF THE INVENTION The present invention provides a heating apparatus for a urea tank which is intended to improve the heat transfer rate by heating or defrosting urea water stored in a urea tank using a PTC device It has its purpose.

It is another object of the present invention to provide a heating device for a urea tank which is intended to reduce heat loss by maximally transferring heat of a Pitisserie assembly to a heating casing while mounting a Pitisserie assembly including a Pitisserie device on a heating casing. have.

It is another object of the present invention to provide a heating device for a urea tank which is made of a material for preventing corrosion of a heating casing to improve durability.

A heating apparatus for a urea tank according to the present invention includes: a heat dissipating unit that generates heat when external power is applied; A heating casing accommodating the PTFE assembly and being made of a heat conductive material and provided in a urea tank storing urea water to transfer heat to the urea water; And a heat radiating member provided inside the heating casing for transmitting heat generated from the heat sink assembly to the heating casing.

The Pittsi assembly may include a Pitty-Si device that generates heat by a supplied power source; An electrode plate attached to both sides of the Pitty device and applying power to the Pitty device; And an insulating material wrapping and insulating the electrode plate.

The heat dissipating member may form an inserting portion for forcedly inserting the fittie assembly.

The heat dissipation member may be inserted into the heating casing such that the circumferential surface thereof contacts the inner surface of the heating casing, and a chamfered portion may be formed on the circumferential surface corresponding to both side edges of the fittive assembly inserted into the insertion portion.

The heat dissipating member may have a recessed groove portion in an axial direction on a circumferential surface.

The heating casing may form a flange on the peripheral surface to be mounted in the urea tank.

As described above, the heating apparatus for a urea tank according to the present invention can improve the heat transfer rate by heating or defrosting urea water stored in a urea tank using a PTC device, unlike the prior art.

In addition, the present invention can reduce the heat loss by allowing the heat of the heat dissipation assembly to be transmitted to the heating casing as much as possible while mounting the heat dissipation assembly including the heat dissipation member to the heating casing.

In addition, the present invention can improve the durability by fabricating the heating casing with a material that prevents corrosion.

1 is a perspective view of a urea tank having a heating apparatus according to an embodiment of the present invention.
2 is an interior view of a urea tank having a heating device according to an embodiment of the present invention.
3 is an exploded perspective view of a heating apparatus for a urea tank according to an embodiment of the present invention.
4 is a cross-sectional view of a heating apparatus for a urea tank according to an embodiment of the present invention.

Hereinafter, an embodiment of a heating apparatus for a urea tank according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view of a urea tank having a heating apparatus according to an embodiment of the present invention, and FIG. 2 is an interior view of a urea tank having a heating apparatus according to an embodiment of the present invention.

FIG. 3 is an exploded perspective view of a heating apparatus for a urea tank according to an embodiment of the present invention, and FIG. 4 is a sectional view of a heating apparatus for a urea tank according to an embodiment of the present invention.

1 to 4, a heating apparatus 100 for a urea tank 10 according to an embodiment of the present invention includes a PTC (Positive Temperature Coefficient Assembly) 110, a heating casing 120, And a heat dissipation member 130.

In particular, the heating apparatus 100 according to the present invention is mounted on the urea tank 10.

Here, the urea tank 10 may store the urea water therein and may be made of synthetic resin having a low thermal conductivity to prevent the heat of urea water from being discharged to the outside. As described above, since the urea tank 10 is made of a plastic material, the urea water can be prevented from freezing at a low temperature below a certain point. Furthermore, a heat insulating material (not shown) may be additionally installed in the urea tank 10 to further improve the heat insulating effect. As the heat insulating material, any one of polyurethane, polystyrene, and hollow silica gel may be employed, and any one or more of these may be combined.

At the upper end of the urea tank 10, an installation hole 12 is formed. The mounting hole 12 is provided for inserting the heating casing 120. Of course, the heating casing 120 inserted into the urea tank 10 through the installation hole 12 is mechanically fastened to the urea tank 10. Of course, the urea tank 10 can be deformed into various shapes.

On the other hand, the Pittsi assembly 110 generates heat when external power is applied, and serves to heat or defrost the urea water in the urea tank 10.

In particular, the PTFE assembly 110 includes a PTFE element 112, an electrode plate 114, and an insulating material 116.

The Pittsy < / RTI > device 112 is provided to generate heat by a supplied power source. At this time, the Pittsi device 112 is a well-known technique and its detailed internal structure is omitted. Of course, the Pittsi device 112 can be modified into various shapes. For convenience, the Pittsy device 112 is shown in a thin hexahedral shape.

The electrode plate 114 is attached to both sides of the PTC device 112 and is electrically connected to the PTC device 112. At this time, the structure in which the electrode plate 114 is electrically connected to the PTC device 112 is omitted.

In addition, the electrode plate 114 receives power from the outside and supplies the power to the Pitti device 112. Thus, each of the electrode plates 114 has a terminal 115. [ Of course, the electrode plates 114 disposed on both sides with respect to the pitty element 112 may be electrically connected to each other, and the terminal 115 may be provided to any one of the pitty elements 112. The electrode plate 114 can be deformed into various shapes.

In addition, the insulating material 116 covers the electrode plate 114 and serves to insulate the electrode plate 114 from the outside. Of course, the insulating material 116 can be deformed into various shapes.

Therefore, the power supply is applied by the electrode plate 114 contacting the both sides of the Pittsi device 112 in the Pittsi assembly 110 to generate heat. An insulating member is provided on one surface of the electrode plate 114 for electrical insulation from the outside.

The heating casing 120 accommodates the pettish tube assembly 110 and is mounted on the urea tank 10 made of a thermally conductive material so that the urea tank 10 stores the urea water. It is a role to deliver. At this time, the heating casing 120 is made of a material such as aluminum which is excellent in thermal conductivity, is prevented from rusting, and is relatively light.

In addition, the heating casing 120 is formed in a circular tube shape with its lower side closed.

Particularly, the heating casing 120 forms a flange 122 on the circumferential surface in order to be inserted into the mounting hole 12 formed on the upper side of the urea tank 10. That is, until the flange 122 contacts the upper surface of the urea tank 10, the heating casing 120 is inserted into the mounting hole 12 to transfer heat to the urea water. At this time, the flange 122 may be fixed with the urea tank 10 by bolting. Of course, the flange 122 can be deformed into various shapes.

The heat radiating member 130 is provided inside the heating casing 120 to transmit the heat generated from the heat sink assembly 110 to the heating casing 120 as much as possible. Accordingly, the heat radiating member 130 is made of a material having high heat radiation performance or high thermal conductivity.

More specifically, the heat dissipating member 130 includes an inserting portion 132 for inserting the fittie assembly 110 forcibly, and a heat insulating member 130 is inserted into the heating casing 120 such that the circumferential surface thereof contacts the inner surface of the heating casing 120 do.

That is, the heat radiating member 130 is formed in a circular column shape and inserted into the inside of the heating casing 120. At this time, the heat radiating member 130 is made to face the entire inner surface of the heating casing 120 or as wide as possible.

In addition, the heat dissipating member 130 receives the fittie assembly 110 through the insertion portion 132. At this time, the fittie assembly 110 is forcedly inserted into the insertion portion 132. Accordingly, most of the peripheral surface of the PTFE assembly 110 is interfaced with the heat dissipating member 130 corresponding to the inner surface of the insertion portion 132.

As a result, the heat generated in the Pittsi assembly 110 is transferred to the heating casing 120 through the heat dissipating member 130 as much as possible.

In addition, the Pitty's assembly 110 can generate a sufficient calorific value only when the Pitty's element 112 and the electrode plate 114 are brought into close contact with each other.

Thus, after the fittie assembly 110 is inserted into the insertion portion 132, the heat radiation material 130 is pressed on both sides by a pressing device (not shown). At this time, both sides of the heat dissipating member 130 correspond to a wide surface of the electrode plate 114. Accordingly, when the pressurizing device simultaneously presses both sides of the heat dissipating member 130, the physisicle element 112 and the electrode plate 114 come into close contact with each other.

Particularly, when the pressurizing device presses the heat radiating member 130 at a position that does not correspond to the wide surface of the electrode plate 114, the fittie assembly 110 may be broken or deformed.

In order to prevent this, the heat dissipating member 130 has depression grooves 136 formed in portions corresponding to the wide surface of the electrode plate 114 among the peripheral surfaces. The recessed groove portion 136 serves to set the pressing position of the pressing device and serves to prevent any rotation of the heat radiation material 130 when the pressing device presses the pressing device.

In addition, as the depressed depressed portion 136 of the heat dissipating member 130 is pressed, the heat dissipating member 130 can be swollen at an intermediate position between the depressed depressed portion 136 and the depressed depressed portion 136 along the circumferential direction.

In this case, since the heat dissipating member 130 is deformed into an approximately elliptic shape, insertion into the heating casing 120 may be difficult.

In order to prevent this, the heat dissipating member 130 forms a chamfered portion 134 on a circumferential surface corresponding to both side edges of the fittie assembly 110 inserted into the insertion portion 132 in a substantially thin rectangular parallelepiped shape. This prevents the heat dissipating member 130 from being deformed into an elliptical shape when pressed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the true scope of the present invention should be determined by the following claims.

10: Urea tank 12: Mounting hole
100: Heating device 110: Pittsi assembly
112: Pitti element 114: Electrode plate
116: Insulation material 120: Heating casing
122: flange 130: heat dissipating material
132: insertion portion 134: face mounting
136: recessed groove portion 140: heater member

Claims (6)

A heat dissipating member which is heated when external power is applied; A heating casing accommodating the PTFE assembly and being made of a heat conductive material and provided in a urea tank storing urea water to transfer heat to the urea water; And a heat radiating member provided inside the heating casing for transmitting heat generated from the heat sink assembly to the heating casing,
Wherein the heat dissipating member forms an inserting portion for forcibly inserting the heat sink assembly,
The heat dissipating member may include depression grooves formed on both sides of the circumferential surface corresponding to the wide surface of the piston assembly so as to set the direction of the pressing position of the circumferential surface and prevent rotation in the heating casing,
Wherein the heat dissipating member has a chamfered portion formed on a circumferential surface corresponding to both side edges of the fittie assembly inserted into the inserting portion to prevent elliptical deformation when the both sides are pressed.
The assembly of claim 1,
A Pitty-diode device that generates heat by a supplied power source;
An electrode plate attached to both sides of the Pitty device and applying power to the Pitty device; And
And an insulating material which surrounds and insulates the electrode plate.
delete delete delete The method according to claim 1,
Wherein the heating casing forms a flange on a circumferential surface to be mounted in a state of being inserted into the urea tank.
KR1020160013900A 2016-02-04 2016-02-04 Heating apparatus of urea water solution KR101739473B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160013900A KR101739473B1 (en) 2016-02-04 2016-02-04 Heating apparatus of urea water solution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160013900A KR101739473B1 (en) 2016-02-04 2016-02-04 Heating apparatus of urea water solution

Publications (1)

Publication Number Publication Date
KR101739473B1 true KR101739473B1 (en) 2017-05-24

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Country Status (1)

Country Link
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