Electric heating tail gas catalytic treatment device and automobile

Abstract

The utility model provides an electric heating tail gas catalytic treatment device and an automobile, and belongs to the technical field of automobile tail gas pollutant emission reduction, the electric heating tail gas catalytic treatment device comprises a containing pipe, a catalyst carrier and an electric heating element, two ends of the containing pipe are respectively a tail gas inlet and a tail gas outlet; the catalyst carrier is arranged in the containing pipe, and a tail gas catalyst is arranged on the catalyst carrier so as to purify tail gas passing through the containing pipe; the electric heating element is arranged in the containing pipe, and the electric heating element is embedded and attached into the catalyst carrier so as to generate heat to supply heat to the catalyst carrier. By embedding and attaching the electric heating element into the catalyst carrier, the contact area between the electric heating element and the catalyst carrier can be increased, so that the heat energy transfer efficiency and the heat energy utilization rate of the electric heating element for transferring heat energy to the catalyst carrier can be improved, and energy is saved. The electric heating tail gas catalytic treatment device is simple in structure and easy to produce and manufacture, and has good industrial popularization value.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile tail gas pollutant emission reduction, in particular to an electric heating tail gas catalytic treatment device and a car. Background Art

[0002] Vehicle exhaust is one of the important sources of air pollution, and its impact on the environment cannot be underestimated, so automobile exhaust needs to be treated before being discharged into the atmosphere. At present, automobile exhaust is usually treated by exhaust catalytic treatment technology, that is, a catalytic converter is configured in the automobile exhaust pipe to make the exhaust gas emitted by the automobile meet the existing emission regulations.

[0003] However, existing catalysts have an optimal operating temperature range. Only within the optimal operating temperature range can the catalyst achieve the best catalytic effect. Otherwise, it is difficult for the treated exhaust gas to meet the exhaust emission requirements. At present, the method of increasing the exhaust temperature is usually adopted to ensure that the catalyst treats the exhaust gas within the optimal operating temperature range, but the above method requires the car to exhaust a stable airflow to ensure the heating effect. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present utility model is to provide an electrically heated exhaust catalytic treatment device and a vehicle, which is used to solve the problem that the heating efficiency of the catalyst carrier in the catalyst in the prior art is poor, which leads to exhaust gas treatment that is not as good as expected and causes environmental pollution.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides an electrically heated exhaust gas catalytic treatment device, comprising:

[0006] A containing pipe, wherein two ends of the containing pipe are respectively an exhaust gas inlet and an exhaust gas outlet;

[0007] A catalyst carrier, the catalyst carrier is disposed in the housing tube, and an exhaust gas catalyst is disposed on the catalyst carrier to purify the exhaust gas passing through the housing tube;

[0008] An electric heating element is disposed in the housing tube and embedded in the catalyst carrier to generate heat for heating the catalyst carrier.

[0009] Optionally, the electric heating element includes at least two heating plates, and the heating plates are arranged along the axial direction of the containing tube.

[0010] Optionally, the heating plates are evenly distributed in the catalyst carrier.

[0011] Optionally, each of the heating plates extends from the axis of the containing tube to the outside of the containing tube along the radial direction of the containing tube, and the edges of adjacent heating plates close to the axis of the containing tube are connected to each other.

[0012] Optionally, there are two heating plates, and the two heating plates are arranged in mirror symmetry with each other. The cross-sectional shapes of the two heating plates in the cross-section perpendicular to the axis of the containing tube are both L-shaped, and the two L-shaped bending parts are close to each other; a wiring sleeve passing through the wall of the containing tube is arranged between the edges of the two heating plates close to each other, and the edge of the heating plate close to the wiring sleeve extends toward the wiring sleeve with a connecting portion, and the connecting portion is connected to the wiring sleeve.

[0013] Optionally, adjacent L-shaped arms are perpendicular to each other, and the connecting portion extends along the circumference of the containing tube and fits against the inner wall of the containing tube.

[0014] Optionally, a heat insulating sleeve is provided between the containing tube and the catalyst carrier.

[0015] Optionally, the electric heating element is a positive temperature coefficient heater.

[0016] Optionally, along the axial direction of the containing tube, the length of the heating plate is greater than or equal to the length of the catalyst carrier.

[0017] The utility model also provides an automobile, comprising the above-mentioned electrically heated exhaust gas catalytic treatment device.

[0018] As described above, the utility model is an electric heating exhaust catalytic treatment device and a vehicle, which has the following features:

[0019] Beneficial effects:

[0020] By embedding the electric heating element in the catalyst carrier, the contact area between the electric heating element and the catalyst carrier can be increased, thereby improving the heat transfer efficiency and heat utilization rate of the electric heating element to transfer heat energy to the catalyst carrier, saving energy. The electric heating exhaust gas catalytic treatment device has a simple structure, is easy to produce and manufacture, and has good industrial promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of an electrically heated exhaust gas catalytic treatment device according to an embodiment of the utility model.

[0022] Figure 2 This is a front view of the electrically heated exhaust catalytic treatment device according to an embodiment of the utility model.

[0023] Figure 3 It is a schematic structural diagram of an electric heating element according to an embodiment of the utility model.

[0024] Figure 4 This is a front view of the electric heating element according to an embodiment of the utility model.

[0025] Figure 5 It is a schematic structural diagram of the heat insulation sleeve according to an embodiment of the utility model.

[0026] Explanation of reference numerals: 1. Wire outlet sleeve; 2. Catalyst carrier; 3. Electric heating element; 31. Heating plate; 32. Connecting part; 33. Wiring sleeve; 4. Insulation sleeve; 5. Accommodating tube; 6. Wire outlet. DETAILED DESCRIPTION

[0027] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] See also Figures 1 to 5 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0029] In order to describe the utility model in detail, an electric heating exhaust catalytic treatment device and a vehicle of the utility model are specifically described below:

[0030] Please combine Figures 1 to 4As shown, the utility model provides an electric heating exhaust catalytic treatment device, including a containing tube 5, a catalyst carrier 2 and an electric heating element 3, the two ends of the containing tube 5 are exhaust inlet and exhaust outlet respectively; the catalyst carrier 2 is arranged in the containing tube 5, and an exhaust catalyst is arranged on the catalyst carrier 2 to purify the exhaust passing through the containing tube 5; the electric heating element 3 is arranged in the containing tube 5, and the electric heating element 3 is embedded and attached in the catalyst carrier 2 to generate heat to heat the catalyst carrier 2. By embedding the electric heating element 3 in the catalyst carrier 2, the contact area between the electric heating element 3 and the catalyst carrier 2 can be increased, so that the heat energy transfer efficiency and heat energy utilization rate of the electric heating element 3 to transfer heat energy to the catalyst carrier 2 can be improved, and energy can be saved. The electric heating exhaust catalytic treatment device has a simple structure, is easy to produce and manufacture, and has good industrial promotion value.

[0031] The electric heating element 3 includes at least two heating plates 31, and the heating plates 31 are arranged along the axial direction of the containing tube 5. At least two heating plates 31 can increase the contact area between the catalyst carrier 2 and the electric heating element 3, and improve the transfer efficiency of heat energy from the electric heating plates 31 to the catalyst carrier 2.

[0032] Among them, each heating plate 31 is evenly distributed in the catalyst carrier 2. The heating plates 31 evenly distributed in the catalyst carrier 2 can evenly heat the catalyst carrier 2, and at the same time avoid the situation that when the temperature of the heating plate 31 rises, the temperature difference on both sides of the heating plate 31 is too large, causing the deformation amount on both sides of the heating plate 31 to be different, which is easy to form a stress concentration point on the heating plate 31, causing the heating plate 31 to be damaged.

[0033] In some embodiments, each heating plate 31 extends from the axis of the containing tube 5 to the outside of the containing tube 5 along the radial direction of the containing tube 5, and the edges of adjacent heating plates 31 near the axis of the containing tube 5 are connected to each other. The edges of the heating plates 31 near the axis of the containing tube 5 are connected to each other, which can reduce the number of wires required to connect the heating plates 31, reduce manufacturing costs and assembly steps. In other embodiments, each heating plate 31 can be connected to a wire.

[0034] In this embodiment, there are two heating plates 31, and the two heating plates 31 are arranged in mirror symmetry with each other. The cross-sectional shapes of the two heating plates 31 on the cross-section perpendicular to the axis of the receiving tube 5 are both L-shaped, and the two L-shaped bends are close to each other; a wiring sleeve 33 passing through the tube wall of the receiving tube 5 is arranged between the edges of the two heating plates 31 close to each other, and a connecting portion 32 extends toward the wiring sleeve 33 from the edge of the heating plate 31 close to the wiring sleeve 33, and the connecting portion 32 is connected to the wiring sleeve 33. In this embodiment, the electric heating element 3 is a positive temperature coefficient heater, which is difficult to process. Therefore, the positive temperature coefficient heater is processed into the above shape, which can reasonably utilize the advantages of the positive temperature coefficient heater while ensuring the industrial feasibility of the heating plate 31. At the same time, the above structure can make the positive temperature coefficient heater have a certain elastic variable when the catalyst carrier 2 is deformed due to temperature changes, thereby improving the adaptability of the positive temperature coefficient heater in a variable temperature environment. The two mirror-arranged heating plates 31 can reduce the difficulty of producing and manufacturing the heating plate 31. Furthermore, when producing and manufacturing the heating plate 31 , only one type of heating plate 31 needs to be manufactured, thereby reducing the investment cost of processing equipment and having good practicality.

[0035] The positive temperature coefficient heater has the advantages of rapid heating, high thermal efficiency, durability without oxidation, and long service life. When the catalyst needs to be heated, power is supplied to the positive temperature coefficient heater at a constant voltage. In view of the inherent characteristics of the positive temperature coefficient heater, at the initial temperature (room temperature), the resistance of the positive temperature coefficient heater is small, the initial heating current is large, and the heating power is high. As the temperature of the positive temperature coefficient heater and the catalyst carrier 2 increases, the resistance of the positive temperature coefficient heater will increase sharply. When the voltage remains unchanged, the current and power will drop sharply accordingly. Thus, the positive temperature coefficient heater can automatically maintain the current temperature and no longer continue to heat up. At the same time, the use of a positive temperature coefficient heater can avoid the risk of leakage and has good safety during use.

[0036] like Figure 1 , Figure 2 and Figure 5 As shown, a heat insulating sleeve 4 is provided between the receiving tube 5 and the catalyst carrier 2. Since the heat insulating sleeve 4 is used to prevent heat from being transferred to the receiving tube 5, the heat insulating sleeve 4 can reduce the heat loss in the electric heating exhaust gas catalytic treatment device and increase the utilization rate of heat energy. At the same time, it can also prevent the heat from being lost outside the electric heating exhaust gas catalytic treatment device, damaging the components in the vehicle and causing safety accidents. It can be understood that the heat insulating sleeve 4 is provided with an outlet 6 for inserting electric wires, and the above-mentioned electric wires are used to connect to the electric heating element 3.

[0037] In this embodiment, the catalyst carrier 2 is a ceramic material such as chlorite, and the catalyst carrier 2 is provided with a hole for passing automobile exhaust along the axial direction of the containing tube 5. Because its thermal expansion coefficient is different from that of the positive temperature coefficient heater, when the temperature of the electric heating element 3 rises and the catalyst carrier 2 is heated, the heating plate 31 and the catalyst carrier 2 are deformed at the same time and the deformation size is different. By making the angle between the two adjacent heating plates 31 a right angle, the temperature on both sides of the heating plate 31 can be roughly the same, and the deformation amount generated by the two adjacent heating plates 31 is the same, so that the two adjacent heating plates 31 can squeeze the catalyst carrier 2 to move slightly along the radial direction of the containing tube 5, squeeze the heat insulation sleeve 4, increase the service life of the electric heating exhaust catalytic treatment device, and reduce the maintenance and overhaul frequency of the electric heating exhaust catalytic treatment device. It can be seen from this that the material of the heat insulation sleeve 4 can be made of a fiber material with a large deformation amount, such as glass fiber, asbestos, etc.

[0038] The catalyst carrier 2 is interference-fitted with the inner wall of the containing tube 5, so as to avoid the catalyst carrier 2 moving in the containing tube 5 during the running of the automobile, thereby preventing the catalyst carrier 2 from being damaged.

[0039] In the axial direction of the receiving tube 5, the length of the heating plate 31 is greater than or equal to the length of the catalyst carrier 2. In this way, the catalyst carrier 2 can be heated better, ensuring the heating effect of the electric heating element 3 on the catalyst carrier 2.

[0040] In this embodiment, the accommodating tube 5 is a packaging sleeve of the catalyst carrier 2, and a wire outlet sleeve 1 for outlet is provided on the packaging sleeve, and the wire electrically connected to the electric heating element 3 passes through the packaging sleeve through the wire outlet sleeve 1. The packaging sleeve can protect the catalyst carrier 2, prevent the external environment from affecting the catalyst carrier 2, ensure the normal operation of the catalyst carrier 2, and prevent the catalyst carrier 2 from being scattered in the outside world and polluting the environment.

[0041] The utility model also provides a car, comprising the above-mentioned electric heating exhaust gas catalytic treatment device

[0042] In summary, by embedding the electric heating element 3 in the catalyst carrier 2, the contact area between the electric heating element 3 and the catalyst carrier 2 can be increased, thereby improving the heat transfer efficiency and heat utilization rate of the electric heating element 3 to transfer heat energy to the catalyst carrier 2, saving energy. The electric heating exhaust gas catalytic treatment device has a simple structure, is easy to produce and manufacture, and has good industrial promotion value.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An electrically heated exhaust gas catalytic treatment device, characterized in that: include: A containing pipe, wherein two ends of the containing pipe are respectively an exhaust gas inlet and an exhaust gas outlet; A catalyst carrier, the catalyst carrier is disposed in the housing tube, and an exhaust gas catalyst is disposed on the catalyst carrier to purify the exhaust gas passing through the housing tube; An electric heating element is disposed in the housing tube and embedded in the catalyst carrier to generate heat for heating the catalyst carrier.

2. The electrically heated exhaust gas catalytic treatment device according to claim 1 is characterized in that: The electric heating element includes at least two heating plates, and the heating plates are arranged along the axial direction of the containing tube.

3. The electrically heated exhaust gas catalytic treatment device according to claim 2 is characterized in that: The heating plates are uniformly distributed in the catalyst carrier.

4. The electrically heated exhaust gas catalytic treatment device according to claim 2 is characterized in that: Each of the heating plates extends from the axis of the containing tube to the outside of the containing tube along the radial direction of the containing tube, and the edges of adjacent heating plates close to the axis of the containing tube are connected to each other.

5. The electrically heated exhaust gas catalytic treatment device according to claim 2 is characterized in that: There are two heating plates, which are arranged in mirror symmetry with each other, and the cross-sectional shapes of the two heating plates on the cross-section perpendicular to the axis of the containing tube are both L-shaped, and the two L-shaped bending parts are close to each other; a wiring sleeve passing through the wall of the containing tube is arranged between the edges of the two heating plates close to each other, and a connecting portion extends toward the wiring sleeve at the edge of the heating plate close to the wiring sleeve, and the connecting portion is connected to the wiring sleeve.

6. The electrically heated exhaust gas catalytic treatment device according to claim 5 is characterized in that: Adjacent L-shaped arms are perpendicular to each other, and the connecting portion extends along the circumference of the containing tube and fits against the inner wall of the containing tube.

7. The electrically heated exhaust gas catalytic treatment device according to any one of claims 1 to 6, characterized in that: A heat insulating sleeve is arranged between the containing tube and the catalyst carrier.

8. The electrically heated exhaust gas catalytic treatment device according to claim 1 is characterized in that: The electric heating element is a positive temperature coefficient heater.

9. The electrically heated exhaust gas catalytic treatment device according to any one of claims 2 to 6, characterized in that: Along the axial direction of the containing tube, the length of the heating plate is greater than or equal to the length of the catalyst carrier.

10. An automobile, characterized in that: It comprises the electrically heated exhaust gas catalytic treatment device as described in any one of claims 1 to 9.

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