CN201606168U - Engine intake heater with new structure - Google Patents

Abstract

The utility model proposes an engine air intake heater with a new structure, which includes a drawer-type frame, a PTC ceramic heating sheet and a cooling part. Wherein, the drawer-type frame can be withdrawn or inserted and arranged in the intake pipe of the engine. The PTC ceramic heating sheet and the heat sink are arranged in the drawer frame at intervals. The engine air intake heater with a new structure provided by the utility model is installed in the intake pipe of the engine in a "drawer type" installation manner, and has a simple structure and convenient installation. Before and when the engine is started, the PTC ceramic heating sheet is energized to generate heat to heat the air entering the engine cylinder, thereby improving the low-temperature starting performance of the engine and optimizing the combustion conditions in the engine cylinder. The PTC ceramic heating plate heats up quickly during heating, and only generates heat energy without light consumption, which further improves the heating efficiency.

Description

Engine intake heater with new structure

technical field

The utility model relates to a heater, and in particular relates to an engine intake heater with a new structure.

Background technique

At present, China's automobile and engine industries are developing rapidly. The engine is ignited and started by the ignition system. Therefore, whether it can be ignited normally is an important performance of the engine. However, when the air temperature is low, due to the low temperature of the air entering the engine, the combustible gas cannot reach the combustion temperature at the moment of ignition, so that the engine cannot be ignited smoothly.

An auxiliary heating device for starting the engine is usually used to improve the above problems. Currently, the commonly used heating devices include flame glow plugs, metal electric heating wires, and the like. These heaters can improve the low-temperature starting performance of the engine to varying degrees, but they also have some shortcomings: for example, the environmental protection performance of the flame glow plug is poor, and the warm-up time is long; the control of the metal heating wire is complicated, and the warm-up time is relatively long. Long and poor security.

Contents of the invention

In view of this, the purpose of the utility model is to provide an engine air intake heater with a new structure that is pollution-free, high in energy utilization rate, high in reliability and stability.

The utility model proposes an engine air intake heater with a new structure, which includes a drawer-type frame, a PTC ceramic heating sheet and a cooling part. Wherein, the drawer-type frame can be withdrawn or inserted and arranged in the intake pipe of the engine. The PTC ceramic heating sheet and the heat sink are arranged in the drawer frame at intervals.

As a further improvement of this solution, the heat sink includes a first aluminum sheet and a second aluminum sheet, the second aluminum sheet is bent into a Z shape, and the first aluminum sheet is fixed to the protrusion of the second aluminum sheet. Further, the PTC ceramic heating sheet is fixed on the first aluminum sheet. The heat sink is made of aluminum sheet with good electrical and thermal conductivity, which also plays a role in heat dissipation while conducting electricity. The heat generated by the PTC ceramic heating plate can be quickly transferred to the air passing through its surface through the heat sink, so that the temperature of the air passing through it will increase immediately.

As a further improvement of this solution, the engine air intake heater of the novel structure further includes a connecting piece, which connects the same ends of the two radiators. In this way, the utility model can form a closed current loop during use, and can realize the parallel connection of each PTC ceramic heating piece.

As a further improvement of this solution, the drawer frame is provided with connecting bolts connected with the connecting piece. The two connecting bolts are the positive and negative poles connected to the circuit of the utility model. During use, only the electrodes of the power supply need to be connected with the above-mentioned connecting bolts.

As a further improvement of this solution, the heat sink and the PTC ceramic heating chip are connected by PTC glue.

The utility model provides an engine intake heater with a new structure for low-temperature cold start of the engine, which is installed in the intake pipe of the engine in a "drawer-type" installation manner, with simple structure and convenient installation. Before and when the engine is started, the PTC ceramic heating sheet is energized to generate heat to heat the air entering the engine cylinder, thereby improving the low-temperature starting performance of the engine and optimizing the combustion conditions in the engine cylinder. The PTC ceramic heating plate heats up quickly during heating, and only generates heat energy without light consumption, which further improves the heating efficiency.

Description of drawings

FIG. 1 is a schematic structural diagram of an engine air intake heater with a new structure according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of the heating component in FIG. 1 .

Fig. 3 is a schematic structural diagram of a heating component of an engine air intake heater with a new structure according to another embodiment of the present invention.

Detailed ways

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Example 1:

1 and 2 , the engine air intake heater with a new structure provided by the utility model includes a drawer frame 10 , a PTC ceramic heating chip 11 , a radiator 12 and a connecting piece 13 . Wherein, the PTC ceramic heating chip 11 , the cooling element 12 and the connecting element 13 are fixed in the drawer frame 10 . The PTC ceramic heating chip 11 and the radiator 12 are fixed to each other to form a heating component 14 .

The material used for the drawer frame 10 is an insulating material with a temperature resistance of more than 230° C., and can be processed into different shapes according to the needs of the engine air inlet installation. When in use, the drawer frame 10 can be drawn or inserted into the intake pipe of the engine.

In the utility model, the heater adopts a PTC ceramic heating chip 11, which is mainly composed of barium titanate material, and its heating performance has a PTC (positive temperature coefficient resistance) characteristic. The two largest surfaces of each PTC ceramic heating chip 11 are electrode surfaces, and the electrode surfaces are sprayed with aluminum. The surface of the PTC ceramic heating chip 11 is welded together with a metal heat sink (aluminum sheet) after being plated with aluminum, so that its contact is more closely firm, which is conducive to the conduction and distribution of heat.

The maximum initial inrush current of each PTC ceramic heating chip 11 is 20A, and its Curie temperature is generally T±10°C (the range of T is generally 140°C-230°C). At room temperature 25°C, the time to reach the Curie temperature when the rated voltage is applied is ≤20S. Under the rated voltage, the current when it reaches the Curie temperature is ≤0.3A, the maximum withstand voltage is equivalent to twice the rated voltage, and the flatness of the two electrode surfaces is generally controlled at ≤0.02mm.

As shown in FIG. 2 , the heat sink 12 includes a first aluminum sheet 120 and a second aluminum sheet 121 , wherein the second aluminum sheet 121 is bent into a Z shape to increase the heat dissipation area. As shown in FIG. 2 , the two first aluminum sheets 120 are fixed to the protrusions of the second aluminum sheet 121 through brazing process. This can ensure the uniformity and firmness of its welding, and the solder joints are firm without loosening.

The surfaces of the first aluminum sheet 120 and the second aluminum sheet 121 are flat, without surface defects such as oxidation, burrs, and corrosion. The thickness of the aluminum sheet material is generally controlled at t=0.3mm-0.8mm, and this thickness can be determined according to heat dissipation conditions and low temperature. The starting power needs to be adjusted, and the flatness of the contact surface should generally be ≤0.1mm.

In this embodiment, in order to improve the heat dissipation effect, the heating component 14 in the middle of the drawer frame 10 adopts a combination of two PTC ceramic heating chips 11 with two sets of heat sinks 12 fixed therebetween. And the PTC ceramic heating sheet 11 at the junction with the drawer frame 10 is selected as a group of heat sinks 12 .

The above-mentioned PTC ceramic heating sheet 11 and the second aluminum sheet 121 of the heat sink 12 are bonded with high-performance PTC glue (Liyang Kangda Nanda brand) with functional silicone grease, and then baked in an oven at a temperature of about 180°C. Bake for 80-120 minutes, clamp with special clamps before entering the oven, and ensure that the bonding is firm. In this way, the heat sink 12 and the PTC ceramic heating chip 11 are combined into different sizes and shapes through brazing and bonding processes.

In order to make the utility model form a closed current loop during use and meet the parallel connection mode of each PTC ceramic heating chip 11 , it is also necessary for the connector 13 to connect each part through the end of the heat sink 12 . Specifically, the first aluminum sheet 120 may be connected to the connecting member 13 by pressure riveting.

In FIG. 1 , the heating component 14 is fixed on the drawer frame 10 by an adhesive material, which may be the same as the adhesive material of the heat sink 12 and the PTC ceramic heating chip 11 . As shown in FIG. 1 , the connecting piece 13 and the drawer frame 10 are fixed together by connecting bolts 15 and connecting nuts 16 . When the product is installed and used, the two connecting bolts 15 are the positive and negative poles of the product circuit connection, and the engine air intake heater of this new structure promptly starts to work when the circuit is turned on.

After the above parts are assembled, the heating part 14 and the drawer frame 10 should be connected again with a blind rivet 17 (see Figure 1) to meet the reliability of the product combination when the engine vibration occurs during the working process, thereby avoiding the Product damage due to vibration. Finally, the utility model is put into the intake pipe of the engine, and 6 mounting holes 18 on the drawer frame 10 are utilized to be connected with the intake pipe of the engine.

The working principle of the product of the utility model is that the engine air intake heater of the new structure is energized through the connecting bolt 15. When the PTC ceramic heating sheet 11 has a current passing through, the impact current makes the temperature of the ceramic sheet rise rapidly, and the PTC ceramic heating sheet 11 The resistance value immediately enters the high-resistance transition region, and only the residual current keeps the surface temperature of the PTC ceramic heating chip 11 at a constant value.

According to the calibration situation of the engine low-temperature starting test: the optimum temperature range is 140°C to 230°C, and the equilibrium temperature has basically nothing to do with the influence of the ambient temperature. The radiator 12 can dissipate the heat generated by the PTC ceramic heating sheet 11, thereby heating the intake air temperature of the engine. It is characterized by reliability, easy adjustment of heat generation, low requirements on power supply stability, automatic adjustment of heat generation with ambient temperature changes, and fast response time.

The engine air intake heater with this new structure can be directly controlled by the ECU. A relay is usually connected between the heater and the ECU. The ECU only needs to request the heater to preheat or disconnect the output signal to control the relay. Open, so as to achieve the function of automatic control.

Example 2:

As shown in FIG. 3 , in this embodiment, the structure of the engine air intake heater with a novel structure is mostly the same as that in Embodiment 1, and the same parts use the same symbols, and only the different parts will be described below.

Referring to FIGS. 1 to 3 , in this embodiment, the heating component 14 in the drawer frame 10 adopts a combination of two PTC ceramic heating chips 11 with a group of heat sinks 12 fixed therebetween.

The specific implementation cases described in the utility model are only preferred implementation examples of the utility model, and are not used to limit the implementation scope of the utility model. That is, all equivalent changes and modifications made according to the content of the patent scope of the utility model should be regarded as the technical category of the utility model.

Claims (6)

1. The engine air intake heater of a kind of novel structure, it is characterized in that, comprise drawer type frame and the PTC ceramic heating plate and radiator that are arranged in the drawer type frame at intervals mutually, described drawer type frame can be drawn out or inserted ground setting in the intake pipe of the engine. 2. The engine air intake heater with a novel structure according to claim 1, wherein the radiator includes a first aluminum sheet and a second aluminum sheet, and the second aluminum sheet is bent into a Z shape, The first aluminum sheet is fixed on the protrusion of the second aluminum sheet. 3. The engine air intake heater with new structure according to claim 2, characterized in that, the PTC ceramic heating sheet is fixed to the first aluminum sheet. 4. The engine air intake heater with a novel structure according to claim 1 or 2, further comprising a connecting piece connecting the same end of the two cooling pieces. 5. The engine air intake heater with novel structure according to claim 4, characterized in that, the drawer-type frame is provided with connecting bolts to be connected with the connecting piece. 6. The engine air intake heater with novel structure according to claim 1, characterized in that, the heat sink is connected with the PTC ceramic heating sheet by PTC glue.

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