KR101780070B1 - Heating unit of vehicle heating system - Google Patents

Abstract

The present invention reduces electric power consumed by heating the vehicle to lengthen the travelable distance of the vehicle and to lengthen the charge cycle. According to the present invention, there is provided a heating unit comprising: a case which is provided in an air flow passage and has a hollow portion through which blowing air can flow, a blowing air can flow in and out from the upper and lower openings in the blowing direction, A microwave absorbing and heating element having a hollow portion provided in the hollow portion of the case, a plurality of hollow portions provided at appropriate intervals with respect to the holding body and having both ends open at upper and lower sides in the air blowing direction of the holding body; And microwave output means for outputting a microwave toward each of the microwave-absorbing exothermic bodies.

Description

TECHNICAL FIELD [0001] The present invention relates to a heating unit for heating a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heating unit for a vehicle heating apparatus, more particularly, a heating unit for heating air blown at a low power by providing a microwave absorption heating element for heating by absorbing a microwave in a vehicle air conditioning unit or vehicle air duct.

Recently, a variety of hybrid vehicles and electric vehicles have been proposed to improve the fuel economy of the vehicle and to reduce the CO ₂ gas emission amount. In these vehicles, particularly electric vehicles, when driving the vehicle with an electric motor, since the electric motor is driven by the electric power of the mounted battery (battery), power consumption is remarkable and the traveling distance is short I have a problem to lose. Therefore, the vehicle traveling distance can be increased by increasing the battery capacity to be mounted. As a result, the weight of the vehicle is increased and the power consumption efficiency is shortened, and the charging frequency is increased .

In such a hybrid vehicle or an electric vehicle, it is necessary to restrain, for example, electric power consumed by the vehicle air conditioner other than the electrical equipment that secures safety during traveling and running to a minimum. As a technique for reducing the power consumption of the air conditioner for a vehicle, for example, a vehicle air conditioner shown in Patent Document 1 below has been proposed.

The automotive air conditioner shown in Patent Document 1 uses a PTC heater in which a plurality of PTC thermistors are arranged as a heating member installed in a vehicle air conditioning unit and requests a surplus electric power of a vehicle that can be supplied to the PTC heater Power consumption obtaining means for requesting power consumption of the PTC heater that changes in accordance with the temperature of the PTC thermistor is provided and the surplus power required by the surplus power obtaining means and the power consumption demanded by the power consumption obtaining means Based on this, the PTC thermistor is controlled to reduce power consumption during heating.

The PTC heater is a heater having a characteristic in which the power consumption is lowered in accordance with a rise in temperature. However, under the condition that the air conditioning temperature of the vehicle and thus the temperature of the PTC heater itself are not rising, such as during cold weather or at the start of traveling, It consumes a lot of power. Particularly, in an electric vehicle, since all the driving driving energy of the vehicle depends on the battery, if the power consumption of the air conditioner for a vehicle increases, the traveling distance of the vehicle is shortened and the charging cycle is shortened.

Patent Document 1: Japanese Patent Application Laid-Open No. 2008-13115

A problem to be solved by the present invention is to reduce the travelable distance of the vehicle and shorten the charging cycle because of the large amount of power consumption required for air conditioning, particularly heating, of the vehicle.

The present invention relates to a vehicle heating apparatus which is installed in an air flow passage of at least one of at least one of indoor air and outdoor air blown into a vehicle and warms the blowing air, A case which is provided in the flow passage and has a hollow portion through which the blowing air can flow and which is capable of blowing air in and out of the upper and lower openings in the blowing direction and is capable of electromagnetic shielding the microwave, A microwave absorbing heat generating element having a hollow portion opened at both sides in the air blowing direction of the supporting body at both ends, the supporting body being provided in the hollow portion of the case; And microwave output means provided in the case for outputting microwaves toward the respective microwave absorbing and heating elements, A hollow portion within the microwave absorbing heat generating element when the distribution to the lower side from the upper air blowing direction, and to heat the air blown by the heat generation due to the absorption of the microwaves by the microwave absorbing heat generating element with the essential characteristics thereof.

INDUSTRIAL APPLICABILITY The present invention can reduce the electric power consumed for heating the vehicle, thereby increasing the travelable distance of the vehicle and increasing the charging cycle.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional explanatory view schematically showing an air conditioning unit of a vehicle air conditioner according to a first embodiment. Fig.
2 is a cross-sectional explanatory view of the heating unit.
3 is a partially exploded view of the heater core.
4 is an explanatory view showing a heating action according to the first embodiment.
5 is a cross-sectional explanatory view showing a part of the heating unit according to the second embodiment.
6 is a partial explanatory view of the heater core.
7 is an explanatory view showing a heating action according to the second embodiment.

In the present invention, it is best to heat the air blown by the microwave-absorbing and heat-generating body which generates heat in accordance with the absorption of the microwave when the blowing air of at least one of the inside air and the outside air flows through the hollow portion of the microwave- .

≪ Example 1 >

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described with reference to the drawings showing embodiments in which a vehicle heating apparatus according to the present invention is disposed in an air conditioning unit.

1 to 3 show an example of a vehicle air conditioner for a hybrid vehicle. The air conditioner unit 1 constituting the air conditioner for a vehicle is arranged below the instrument panel in the vehicle, and a blower fan (not shown) (Including mixed air of the inside air and the outside air) of at least one of the inside air and the outside air sucked through the inside / outside switching door by the rotation of the air conditioner unit 1). The air blown into the air conditioning unit 1 passes through the evaporator 5 and is cooled. Thereafter, the air passes through the heating unit 7 of the vehicle heating device at a rate corresponding to the opening degree of the air mix door, And is generated as the air-conditioning air at a predetermined temperature. This air-conditioned air flows out from the air conditioning unit 1 through the air outlet door that opens and closes corresponding to the blowout motor, passes through the duct, and is blown into the vehicle.

Reference numeral 9 in the drawings denotes a vent hole for blowing air from the vent outlet to the passenger in the vent mode. Reference numeral 11 denotes a vent hole for venting air from the defrost outlet to the inside of the window, And 13 is a foot pot for blowing air from the foot air outlet to the feet of the occupant during the foot mode. In the air conditioning unit 1 extending to the above described ports (ports 9, 11, 13), doors for opening and closing the air blowing are provided, respectively, and illustration thereof is omitted.

The case 15 of the heating unit 7 of the heating unit for a vehicle is formed of a metal such as stainless steel or aluminum which reflects a microwave to be described later and has a cylindrical shape or a square shape with openings at both ends in the air blowing direction, . A heater core (17) is arranged in the middle of the blowing direction in the case (15) so as to be orthogonal to the blowing direction. The heater core 17 includes a support body 21 in which cooling water flow path 19 is folded back and in which cooling water can flow and an inner wall of the support body 21 and a partition wall Like microwave absorbing heat generating element having a hollow portion (23a) which is arranged in plural numbers adjacent to each other in the air blowing direction and has both axial ends on the upper and lower surfaces in the air blowing direction of the support body (21) (23).

The engine cooling water is circulated in the heater core 17 through the cooling water flow passage 19 and warmed by the heating action of the microwave absorbing heating body 23 described later at the time of cold cooling or starting When the temperature of the engine cooling water rises, the blowing air that heats and circulates by heating the microwave absorbing heat generating body 23 is heated. Reference numeral 17a denotes a suction port for cooling water and 17b denotes a discharge port.

The support body 21 is formed of, for example, an investment-resistant ceramics or a heat-resistant synthetic resin that transmits microwaves in a microwave band (2 to 10 GHz). The microwave absorbing heat generating element 23 is formed by an electromagnetic wave absorbing material having a microwave absorbing property such as ferrite, permalloy, and oxidized slag. Since the microwave-absorbing heat generating body 23 is the same sintered material as the support body 21, it can be manufactured by molding and baking the integrated body.

When the electromagnetic wave absorber of the microwave-absorbing heat generating element 23 is made of oxidizing slag, it can be obtained by mixing the powder of the oxidizing slag with ceramics and sintering.

On the outside of the case 15, a microwave oscillation device 25 constituting a part of the microwave output means is mounted. An antenna member 27 constituting a part of the microwave output means connected to the microwave oscillation device 25 is mounted inside the case 15 corresponding to the upper side of the heater core 17 in the blowing direction, And outputs the microwave emitted from the device (25) toward each microwave absorbing and heating element (23).

The microwave oscillator 25 is constituted by a semiconductor microwave oscillator composed of a laser diode and a multi-stage amplifier which output microwaves in a microwave band (2 to 10 GHz) at, for example, 50 to 100 W. As the microwave, for example, the 2.45 GHz band assigned to the applications such as industrial use, scientific use, and medical use by the radio wave method is preferable, but it is not limited to the frequency and the output. As a microwave oscillation member, a magnetron is generally known. In applications such as the present embodiment, a semiconductor microwave oscillator is suitable because it is highly likely that the vacuum tube will be damaged by vibration, heat, or the like.

A microwave shielding member 25 having a plurality of openings 29a and 31a of a size smaller than 1/4? Of the microwave emitted from the microwave oscillation device 25 is provided at the upper end and the lower opening of the case 15 in the blowing direction, (29, 31) are mounted so as to cover the entire opening. The microwave shielding members 29 and 31 are formed by punching a large number of the openings 29a and 31a on a metal plate such as stainless steel or aluminum or by forming conductive metal A conductive resin sheet (plate) formed by molding a conductive material coated with a resin to have a plurality of openings 29a and 31a described above by a conductive resin, Or the like.

The microwave oscillation device 25 is ON-OFF controlled by the temperature of the air detected by a temperature sensor (not shown) provided in the vicinity of each outlet port and the air blowing direction of the heating unit 7, And is controlled to send air of a predetermined temperature. In addition, the case 15 and the microwave shield members 29 and 31 are electrically installed.

Next, the heating action of the blowing air by the heating unit 7 of the vehicle heating apparatus configured as described above will be described.

When the starter is turned ON and the engine is started at the start of the engine or when the operation switch of the vehicle air conditioner is ON, the blower fan is driven to rotate so as to blow air in the air conditioning unit 1 to the evaporator 5 And the microwave absorbing heat generating body 23 of the heater core 17 in the heating unit 7 and blowing air to flow through the microwave absorbing heat generating body 23 of the heater core 17, And outputs a microwave toward the microwave absorbing heat generating body 23. [

At this time, the microwave-absorbing heat generating element 23 generates heat by converting microwaves transmitted through the carrier 21 or directly output microwaves into heat energy by loss of magnetic field and electric field , And heats the air blown through the hollow portion 23a (see Fig. 4).

Most of the microwave output from the antenna member 27 into the case 15 is absorbed by the microwave absorbing heat generator 23 while being reflected in the case 15 and converted into heat energy. Since the microwave can not pass through the openings 29a and 31a of the respective microwave shield members 29 and 31 provided in the openings, leakage to the outside is regulated. Thus, it is possible to prevent the propagation of the microwave to the electronic apparatus mounted on the vehicle. The heated microwave-absorbing heat generating element 23 not only heats the blowing air but also heats the cooling water flowing through the cooling water flow passage 19 by a part of the heat energy.

When the temperature of the cooling water rises to a temperature where the blowing air can be heated, or when the blowing air heated by the heating unit 7 and blown into the vehicle interior is warmed to a preset temperature, the microwave oscillation device 25 is turned off Thereby stopping the heating of the blowing air by the heating unit 7. [ On the other hand, when the temperature of blowing air to be blown becomes lower than the set temperature, the microwave oscillation device 25 is turned ON again to warm the blowing air by the heating unit 7. [

Table 1 shows the temperature rise of the microwave-absorbing and heat generating element 23 by the microwave outputted from the microwave oscillating device 25. Fig. In this example, the output of the microwave oscillation apparatus is set to 100 W and the wavelength of the microwave is set to 2.45 GHz.

Output time (seconds)
Microwave Absorption Heating Element Temperature (℃) 60 152 90 190 120 235 150 261 180 296

As described above, the blowing air circulating in the hollow portion 23a of the microwave-absorbing heat generating element 23 was heated to 75 占 폚 for about one minute by the microwave-absorbing heat generating element 23 which generates heat by the microwave.

In the present embodiment, as the means for heating the blowing air, the blowing air can be heated to a desired temperature by using the microwave-absorbing and heat generating element 23 that absorbs the microwave of low output and generates heat, so that the consumption of electricity required for heating can be reduced .

≪ Example 2 >

5 and 6 show an example of a vehicle air conditioner suitable for a hybrid vehicle equipped with an electric vehicle or an air-cooled engine. Only the heater core 53 of the heating unit 51 is configured as follows, Since the configuration is the same as that of the first embodiment, the same reference numerals are attached thereto and the detailed description is omitted.

In the case 15 of the heating unit 51, the heater core 53 is disposed so as to be orthogonal to the blowing direction in the middle of the blowing direction. The carrier 55 of the heater core 53 is made of investment ceramics, heat-resistant synthetic resin or the like, and has a planar shape having a size capable of closing the space portion of the case 15. A plurality of microwave absorbing and heating elements 57 having axes in the blowing direction and having a hollow portion 57a at the central portion are provided in the carrier 55 at predetermined intervals in the longitudinal direction and the transverse direction. The microwave-absorbing heat generating body 57 is an electromagnetic wave absorbing member such as ferrite or permalloy, and is formed in a pipe shape.

The microwave absorbing heat generating element 57 shown in the figure is configured such that the axial end thereof coincides with the upper surface and the lower surface in the air blowing direction of the carrier 55. The axial ends of the microwave absorbing / As shown in Fig.

Next, the heating action of the air by the heating unit 53 of the vehicle heating apparatus configured as described above will be described.

When the starter is turned ON and the engine is started at the start of the engine or when the operation switch of the vehicle air conditioner is ON, the blower fan is driven to rotate so that the blowing air in the air conditioning unit (50) And the microwave absorbing heat generating body 57 of the heater core 53 in the heating unit 51 and the microwave oscillating device 25 is turned on by operating the microwave absorbing heat generating body 57 in the heating unit 51, And outputs a microwave toward the microwave absorbing heat generating body (57).

At this time, the microwave absorbing heat generating body 57 generates heat by absorbing and converting the output microwaves by thermal energy due to their magnetic field loss and electric field loss, and heats the blowing air flowing through the hollow portion 57a (see FIG. 7 ).

When the blowing air heated by the heating unit 51 and blown into the vehicle room is warmed to a predetermined temperature, the microwave oscillation device 25 is controlled to be OFF by the heating unit 51 based on the signal from the temperature sensor, The microwave oscillation device 25 is turned on again to warm the blowing air by the heating unit 51. The blowing air is heated by the heating unit 51 .

In the description of Embodiments 1 and 2, the heating unit is housed in the air conditioning unit. However, the mounting position of the heating unit in the present invention is not limited to this, and a part of the air blowing duct As shown in Fig.

In the above description, the support bodies 21 and 55 have been described as an investment ceramics material or a heat-resistant synthetic resin material. However, as the support body of the present invention, a stainless steel material or an aluminum material may be used. In the case where the carrier is made of a metal plate, mounting holes (holes) for inserting the respective microwave absorbing heat generating elements are provided in the carrier to fix the ends of the microwave absorbing heat generating elements, and most of them are projected toward the microwave output means.

As a result, the microwave-absorbing heat generating body absorbs the microwave directly outputted or the microwave reflected by the inside of the case or the supporting body, generates heat, and heats the blowing air flowing in the hollow portion.

When the microwave absorbing heat generating element is mounted so as to protrude upward and downward in the air blowing direction, that is, when the axially middle portion of the microwave absorbing heat generating element is inserted into the mounting hole of the carrier, May be mounted so as to protrude upward and downward in the air blowing direction. In this case, the microwave output means may be provided on both sides of the upper and lower sides in the air blowing direction of the carrier, and microwave is absorbed by the microwave absorbing and heating element protruded to each side, and the blowing air circulating in the hollow portion may be heated.

The above-described heating unit has been mainly described for use in a heating apparatus for a hybrid vehicle and an electric vehicle. Even in a vehicle equipped with an engine other than the above, the heater core having the cooling water of the engine as a heat source, Alternatively, the heating unit according to the present invention may be disposed on the lower side and used as an auxiliary heating unit for heating the blowing air until the temperature of the cooling water rises.

1: air conditioning unit 3: air intake port
7, 51: Heating unit 15: Case
17, 53: heater core 19: cooling water flow path
21, 55: Carrier 23, 57: Microwave absorbing heating element
25: microwave oscillation device 27: antenna member
29, 31: a microwave shield member

Claims (11)

1. A heating unit for a vehicle heating apparatus installed in an air flow passage of at least one of at least one of an internal air and an outside air introduced into a vehicle and heating the blowing air,
A case which is provided in the airflow passage and has respective openings for blowing air in and out from the upper and lower sides in the air blowing direction and having a hollow portion therein and made of a metal material capable of electronically shielding microwaves,
A support body provided so as to protrude from the central portion of the hollow portion of the case in the air blowing direction to extend in a plane perpendicular to the air blowing direction to block the air passage,
A plurality of microwave absorbing and heating elements each having a hollow portion provided at an appropriate interval with respect to the supporting body and provided with an axis in the air blowing direction and having both axial end portions opened,
A microwave oscillation means provided outside the case for emitting microwaves,
And an antenna means provided in the case for outputting a microwave to each of the microwave-
And,
Heating the blowing air passing through the hollow portion of the microwave absorbing and heat generating element by the microwave absorbing and heating element which absorbs the microwave outputted from the antenna means and generates heat when the blowing air introduced from the opening on the upper side in the blowing direction of the case passes through the hollow portion of the microwave absorbing and heating element, The heating unit of the vehicle heating device flows out from the lower opening of the air blowing direction. The heating unit of a heating apparatus for a vehicle according to claim 1, wherein the heating unit is provided in an air conditioning unit of the air conditioner for a vehicle. The heating unit of a heating apparatus for a vehicle according to claim 1, wherein the heating unit is provided in a part of a blowing duct for blowing air. The heating device according to claim 1, wherein the carrier is made of an permeable ceramics permeable to microwaves, and the microwave-absorbing heat generating element is composed of at least one of a ferrite material, a permalloy and an oxidizing slag, . The heating unit of a vehicle heating apparatus according to claim 1, wherein the carrier is made of a heat-resistant synthetic resin, and the microwave-absorbing heat generating element is made of at least one of ferrite material, permalloy and oxidizing slag. The heating unit of the vehicle heating apparatus according to claim 1, wherein the carrier is made of a metallic material that reflects the microwave and has an opening coinciding with the hollow portion of the microwave-absorbing heat generating element. The heating unit of a heating apparatus for a vehicle according to claim 6, wherein the microwave-absorbing heat generating element is mounted so as to protrude from the metal carrier to the side where the antenna means is installed. The microwave heating element according to claim 1, wherein the microwave heating element has a tube shape having an axis in a direction coinciding with the blowing direction, and each end in the axial direction protrudes from the side face and the lower side in the air blowing direction of the supporting body Heating unit. The heating unit of a heating apparatus for a vehicle according to claim 1, wherein the supporting body is provided with a cooling water flow path through which the cooling water flows, and the cooling water can be heated together with blowing air flowing through the hollow portion. The heating unit of a vehicle heating apparatus according to claim 1, further comprising a microwave shielding member having a plurality of openings through which blowing air can flow in and out and which shields microwaves, . 11. The heating unit of a heating apparatus for a vehicle according to claim 10, wherein the microwave shield member has a plurality of openings whose inner diameters are equal to or less than 1/4 wavelength of microwave.

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