KR100610383B1 - air conditioning for a vehicle - Google Patents

Abstract

The present invention relates to a vehicle air conditioner, and in particular, by heating by the hot water and heating by the PTC element unit at the same time, even if the hot water is not sufficiently heated, the air can be heated in a short time to improve the heating performance The present invention relates to a vehicle air conditioner that can reduce the cost.

Description

Air conditioning for a vehicle

1 is a cross-sectional view schematically showing a conventional vehicle air conditioner.

Figure 2 is a perspective view showing a conventional PTC heater.

3 is a cross-sectional view of FIG. 2.

Figure 4 is a schematic diagram showing a vehicle air conditioner according to a preferred embodiment of the present invention.

5 is a plan view illustrating the heater core of FIG. 4.

6 is a perspective view of the PTC device unit of FIG.

<Explanation of symbols for the main parts of the drawings>

100: blower 200: evaporator

300: heater core 310: inflow tank

311: inlet pipe 330: outflow tank

331: outflow pipe 350: tube

370: fin 400: temperature control door

500: auxiliary heater core 600: air conditioning case

610: interior and exterior air conversion door 630: defrost door

650: vent door 670: foot door

700: filter 800: PTC element unit

810 PTC element 830 anode electrode plate

835: terminal 850: negative electrode plate

855 terminal 870 insulated frame

The present invention relates to a vehicle air conditioner, and in particular, by heating by the hot water and heating by the PTC element unit at the same time, even if the hot water is not sufficiently heated, the air can be heated in a short time to improve the heating performance The present invention relates to a vehicle air conditioner that can reduce the cost.

In general, a vehicle air conditioner is a vehicle that is installed for the purpose of securing the driver's front and rear view by removing the frost that is worn on the windshield during the rainy season or winter, or by cooling or heating the interior of the car during the summer or winter season. As a built-in product, it is usually equipped with a heating system and a cooling system at the same time, and after selectively introducing outside air or bet, the blower air is heated or cooled and blown into the interior of the vehicle to remove or defrost while cooling and heating the interior of the vehicle. do.

As such a vehicle air conditioner, it is proposed in the publication of Korean Laid-Open Patent Publication No. 2004-0015919.

According to this publication, as shown in FIG. 1, the vehicle internal air or outdoor air is selectively introduced by the blower B in accordance with the opening and closing of the internal / external air switching door D1, and the air is introduced into the air conditioning case (1). After cooling by passing through the surface of the evaporator (E) or by heating the heater core (H) selectively by the operation of the temperature control door (2), and then cool air or warm air blower opening and closing doors (D2, D3) According to the selection of the opening and closing of the doors), the branches are branched into each branch duct (not shown) and discharged to each part of the vehicle interior, thereby eliminating frost while cooling and heating the interior of the automobile.

Here, there are three types of heater cores.

First, as a plug heater using a NiCr coil as a heating element, it is presented in the publication of Korean Patent Laid-Open No. 2003-0092548, which may be degraded and may cause a fire.

Second, as a combustion heater (Webasto) for heating using an independent combustor without using the engine heat, it is presented in the publication of Korean Laid-Open Patent Publication No. 2003-0088279, and is expensive.

Third, as a PTC heater using PTC (Positive Temperature Coefficent, PTC) as a heating element, it is presented in the publication of Korean Utility Model Registration No. 20-0144945. According to this publication, as shown in Figs. 2 and 3, a plurality of short-circuit-proof accommodation plates 13 having through-holes for accommodating the PTC element 20 are arranged inside the frame 11, and each short-circuit. A plurality of heat dissipation fins 15 are disposed between the prevention receiving plates 13 to facilitate heat exchange, and one terminal (eg, -terminal) of each PTC element 20 is connected to a power supply as one and connected to each PTI. The other terminal (for example, + terminal) of the seed element 20 is connected to a power supply through a switch which operates individually. In addition, the plates 17 and 18 are disposed between the short circuit prevention receiving plate 13 and the heat dissipation fins 15.

However, the vehicle air conditioner of the above-described configuration has the following problems.

Although the engine is running and the cooling water temperature has to rise for a certain period of time, the initial heating is difficult because the heating is possible.

The present invention has been made to solve the above-described problem, the air can be heated in a short time even if the hot water is not heated enough can improve the heating performance, the cost can be reduced, the start of the internal engine Since no cooling water is directed to the heater, the heat source inside the engine rises rapidly and the engine output is also improved. The purpose is to provide a vehicle air conditioning apparatus that can be.

Another feature of the present invention is to provide a vehicle air conditioner that can be heated quickly and smoothly according to the engine conditions or heating conditions to increase the heating efficiency.

Vehicle air conditioner of the present invention for achieving the above object is a blower for introducing the internal and external air blower; An evaporator for selectively cooling the air blown from the blower; A heater core for heating the air passing through the evaporator; A temperature control door for selectively opening and closing the air inlet of the heater core; An auxiliary heater core disposed at an outlet of the blower of the heater core; The air conditioning case is provided with a plurality of opening and closing doors for discharging the blown air changed into hot and cold by the temperature control door to the vehicle interior,

The heater core is composed of an inlet tank having an inlet pipe, an outlet tank having an outlet tube 331, a plurality of tubes disposed between the inlet tank and the outlet tank, and fins disposed between the tubes. ,

A PTC element unit is inserted between the some tubes.

According to this configuration, even if the hot water is not sufficiently heated, the air can be heated within a short time, so that the heating performance can be improved and the cost can be reduced.

In addition, there is no cooling water inside the engine at the start-up stage to the heater, so that the heat source inside the engine rises quickly and the engine output is improved.

In particular, the defrosting performance can be improved by easily defrosting the frost generated on the front, rear, and side glass of the vehicle during winter or rainy weather.

In the above-described configuration, the auxiliary heater core, if it is a PTC heater, can be heated quickly and smoothly according to the engine conditions or heating conditions, the heating efficiency can be increased.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

For reference, among the configurations of the present invention to be described below, the same configuration as the prior art will be referred to the above-described prior art, and a detailed description thereof will be omitted.

Figure 4 is a schematic view showing a vehicle air conditioner according to a preferred embodiment of the present invention, Figure 5 is a plan view showing the heater core of Figure 4, Figure 6 is a perspective view showing the PTC device unit of FIG.

As shown in FIG. 4, the vehicle air conditioner of the present embodiment includes a blower 100, an evaporator 200, a heater core 300, a temperature control door 400, an auxiliary heater core 500, The air conditioning case 600 is made.

The blower 100 selectively introduces internal and external air and sends it to the air blower as the internal / external air switching door 610 turns.

The blown air is introduced into the evaporator 200 through the filter 700, and the evaporator 200 selectively cools the introduced air.

As shown in FIG. 5, the heater core 300 for heating the air passing through the evaporator 200 includes an inlet tank 310 having an inlet pipe 311 through which hot water or engine coolant is introduced, and inflowed hot water or An outflow tank 330 having an outlet pipe 331 for returning the coolant back to the engine, a plurality of tubes 350 disposed therebetween to move the coolant, and a fin 370 disposed between the adjacent tubes 350. Is done.

At this time, the PTC element unit 800 is inserted between some tubes 350.

That is, some pins 370 disposed between the tubes 350 are removed and the PTC element unit 800 is inserted.

As shown in FIG. 6, the PTC element unit 800 includes a PTC element 810, anode and cathode electrode plates 830 and 850 disposed on opposite surfaces of the PTC element 810, and an anode. And an insulating frame 870 surrounding the outer circumference of the cathode electrode plates 830 and 850.

PTC element 810 (Positive Temperature Coefficent, Thermally Sensitive Resistor, PTC) is a device having a property that the resistance value is rapidly increased as the temperature rises by the phase transition (PhaseTransition) when a certain temperature is reached.

Terminals 835 and 855 are integrally formed on the positive and negative electrode plates 830 and 850, respectively, and the terminals 835 and 855 are connected to an external circuit.

The insulating frame 870 insulates the electrode plates 830 and 850 and conducts heat generated by the PTC element 810 to the fins 370.

On the other hand, the temperature control door 400 selectively opens and closes the air inlet of the heater core 300.

It is preferable that the auxiliary heater core 500 disposed at the outlet of the heater core 300 is a PTC heater.

Since the PTC heater is presented in the publication of Korean Utility Model Registration No. 20-0144945 proposed in the prior art, reference is made to the above-described publication and detailed description thereof will be omitted.

In the air conditioning case 600 in which the blower 100, the evaporator 200, the heater core 300, and the auxiliary heater core 500 are incorporated, the blower air changed to warm / cold by the temperature control door 400. Is provided with a plurality of opening and closing doors for branching into each branch duct to discharge into the vehicle interior.

The opening / closing door is composed of a defrost door 630, a vent door 650, a foot door 670 and the like depending on the position.

The operation of this embodiment having the above-described configuration will be described below.

When the internal / external air is selectively introduced into the air conditioning case 600 by the internal / external air switching door 610, the blower 100 blows air to the air blower, and the evaporator 200 is selectively cooled according to the cooling mode selection. Done.

At this time, when the temperature control door 400 is blocked so that the air blown in accordance with the cooling mode is not introduced to the heater core 300 side, the cold air passing through the evaporator 200 through the opening and closing doors (630, 650, 670) It is blown indoors.

On the other hand, when the driver operates the switch for heating, the temperature control door 400 is turned so that the air flows into the heater core 300 side, the warmth heated by the heater core 300, each opening and closing door (630, 650) 670 is blown into the room.

Looking at the operation of the heater core 300 in the heating mode, the hot water or cooling water is introduced into the inlet tank 310 from the inlet pipe 311 and distributed to a plurality of tubes 350 to heat the air along the tube 350 This is delivered to the outlet tank 330 is discharged to the engine.

At this time, the power supply voltage of the vehicle is applied through the terminals 835 and 855 of the electrode plates 830 and 850 before the hot water temperature of the engine rises to an appropriate set temperature.

As a result, the PTC element unit 800 generates heat, and the generated heat is conducted to the fin 370 through the electrode plates 830 and 850 and the insulating frame 870.

In this way, the heating by the hot water and the heating by the PTC element unit 800 is made at the same time, even if the hot water is not sufficiently heated, the air can be heated in a short time can improve the heating performance, the cost is reduced .

In addition, there is no cooling water inside the engine at the start-up stage to the heater, so that the heat source inside the engine rises quickly and the engine output is improved.

In particular, the defrosting performance can be improved by easily defrosting the frost generated on the front, rear, and side glass of the vehicle during winter or rainy weather.

On the other hand, the auxiliary heater core 500 serves to assist the heater core 300 to operate according to the state of the engine, or to detect the heating state of the vehicle interior and operate accordingly.

In this way, the auxiliary heater core 500 is mounted, the heating efficiency is increased quickly and smoothly according to the engine conditions or the heating state is increased.

As described above, since the heater core 300 and the auxiliary heater core 500 are provided, the temperature rise of about 4 ° C. for the PTI integrated heater and about 4 ° C. for the PC heater may be expected. Due to the low price can be expected to increase the temperature of more than about 10 ℃.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below. Or it may be modified.

According to the vehicle air conditioner of the present invention as described above, there are the following effects.                     

First, the heating by the hot water and the heating by the PTC element unit at the same time, even if the hot water is not sufficiently heated, the air can be heated in a short time can improve the heating performance, the cost can be reduced.

In addition, there is no cooling water inside the engine at the start-up stage to the heater, so that the heat source inside the engine rises quickly and the engine output is improved.

In particular, the defrosting performance can be improved by easily defrosting the frost generated on the front, rear, and side glass of the vehicle during winter or rainy weather.

Second, by being equipped with an auxiliary heater core in addition to the heater core, the heating efficiency can be increased quickly and smoothly according to the engine conditions or heating conditions.

Claims (2)

A blower (100) for sending the introduced internal and external air to a blower; An evaporator (200) for selectively cooling the air blown from the blower (100); A heater core 300 for heating the air passing through the evaporator 200; A temperature control door 400 for selectively opening and closing the air inlet of the heater core 300; An auxiliary heater core 500 disposed at an outlet of the blower of the heater core 300; The blower 100, the evaporator 200, the heater core 300, and the auxiliary heater core 500 are built-in, and the blower air is changed to warm / cold by the temperature control door 400. The air conditioning case 600 is provided with a plurality of opening and closing doors for discharging the vehicle interior, The heater core 300 includes an inflow tank 310 having an inflow pipe 311, an outflow tank 330 having an outflow pipe 331, and between the inflow tank 310 and the outflow tank 330. It consists of a plurality of tubes 350 and pins 370 disposed between the tube 350, The PTC element unit 800 is inserted between the some tubes 350. The PTC element unit 800 includes a PTC element 810, positive and negative electrode plates 830 and 850 disposed on opposite surfaces of the PTC element 810, and positive and negative electrode plates 830 and 850. Vehicle air conditioning apparatus, characterized in that consisting of an insulating frame 870 surrounding the outer periphery. The method of claim 1, The auxiliary heater core 500 is a vehicle air conditioner, characterized in that the PTC heater.

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