JPH09254630A - Vehicular air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively enhance heating performance by increasing the amount by which inside air is introduced, while maintaining fog resistance. SOLUTION: A Peltier-element complex 8 is placed at the boundary between an outside air guide passage 13 and an inside air guide passage 14, absorbs heat from inside air in the inside air guide passage 14 to cool and dehumidify the inside air, and radiates the heat to outside air in the outside air guide passage 14 to heat the outside air. The inside and outside air is blown out of a defroster vent 7 via a second air passage 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner capable of heating the interior of a vehicle, and is particularly suitable for use in a diesel vehicle or a hybrid vehicle in which a heat source is difficult to obtain.

[0002]

2. Description of the Related Art In recent years, air conditioners for vehicles have been
Various proposals have been made to improve the heating performance by reducing the amount of introduced outside air having a larger ventilation load and heating load and increasing the amount of introduced inside air having a smaller ventilation load and heating load. However, the introduction of higher humidity inside air causes a problem that the windshield becomes cloudy. On the other hand, in the vehicle air conditioner proposed in Japanese Unexamined Patent Publication No. 6-143996, dehumidification of the inside air is performed to perform heating while maintaining the antifogging property.

Specifically, a first air passage for introducing the inside air and a second air passage for introducing the outside air are defined in the case of the vehicle air conditioner. Inside air and outside air in the second air passage are introduced into the vehicle compartment. The amount of introduced inside air into the first air passage and the amount of introduced outside air into the second air passage are adjusted by changing the air amounts of the blowers provided on the air upstream sides of the first and second air passages, respectively. .

A heat pipe is provided across the first air passage and the second air passage. Here, the heat pipe is one in which a heat medium is circulated inside, and the heat medium absorbs the heat of the inside air on the inside air side and releases the heat absorbed by the inside air on the outside air side to the outside air. The dehumidifying capacity of this heat pipe is determined by the temperature difference between the inside air temperature and the outside air temperature. Then, according to the dehumidifying ability of the heat pipe, the amount of introduced inside air in consideration of the antifogging property of the windshield is determined.

[0005]

However, in the above-mentioned prior art, since the inside air temperature and the outside air temperature cannot be artificially changed, it is not possible to obtain a sufficient temperature difference between the inside air temperature and the outside air temperature. Therefore, the heat pipe cannot obtain a sufficient dehumidifying ability, and it is difficult to sufficiently increase the introduction ratio of the inside air to the total introduced amount of air. That is,
The conventional vehicle air conditioner has a problem that the heating performance cannot be effectively improved.

[0006] The present invention has been made in view of the above points,
The purpose is to increase the amount of introduced inside air and effectively improve the heating performance while maintaining the anti-fog property.

[0007]

In order to achieve the above object, the present invention employs the following technical means. In the invention according to claims 1 to 5, the electric element (8) is arranged in the vicinity of the outside air guide passage (13) and the inside air guide passage (14),
When electrically energized, this electric element (8) is characterized by absorbing heat from the inside air flowing through the inside air guide passage (14) and radiating the outside air flowing through the outside air guide passage (13). .

Even if the temperature difference between the outside temperature and the inside temperature is small, the electric element (8) has a dehumidifying capacity on the heat absorption side of the electric element (8) by adjusting the electric energization amount. It can be fully demonstrated. Therefore, it is possible to effectively absorb and cool the inside air by absorbing heat from the inside air having a relatively high humidity, and to supply the conditioned air including the inside air after the dehumidification and the outside air having a relatively low humidity to the defroster outlet. (7)
By blowing out from the windshield, the anti-fog property of the windshield can be achieved.

The electric element (8) is connected to the inside air guide passage (1
4) By absorbing the heat from the inside air, the heating load of the inside air becomes large. On the other hand, the electric element (8) radiates heat to the outside air in the outside air guide passage (13) to heat the outside air. The load is reduced. Therefore, in case (1), an increase in the heating load on the inside air side can be offset by a decrease in the heating load on the outside air side.

On the other hand, since the electric element (8) can sufficiently exhibit the dehumidifying ability, it is possible to effectively dehumidify the inside air and sufficiently increase the amount of the inside air introduced into the case (1). Since the inside air has a smaller ventilation load and heating load than the outside air, the heating performance can be effectively improved by sufficiently increasing the introduced amount of the inside air. By the way, when the conditioned air is blown out from both the defroster outlet (7) and the foot outlet (5), the conditioned air blown out from the defroster outlet (7) has low humidity because the windshield is antifogging. It is necessary that the conditioned air blown out from the foot outlet (5) is blown to the feet of the occupant, so it does not need to be so low in humidity.

Therefore, paying attention to this point, in the invention described in claims 2 and 3, the inside air inlet (31, 3) is provided at one end.
At least the inside air from 2, 3) is introduced, and the other end communicates with the first air passage (11) communicating with the foot outlet (5), and the inside air and outside air guide passage (13) from the inside air guide passage (14) at one end. ) Through which at least the outside air is introduced, and the other end communicates with the defroster outlet (7).
2) and the partition member (10) are used to partition and form the technical means.

Therefore, when the conditioned air is blown out from both the defroster air outlet (7) and the foot air outlet (5), the inside air with a small heating load, which is efficiently dehumidified by the electric element (8), is changed into the low-humidity air conditioned air. It is possible to introduce into the second air passage (12) that needs to be formed, and to introduce undehumidified inside air from the inside air introduction ports (31, 32, 3) into the first air passage (11). .

That is, on the side of the second air passage (12), by forming the conditioned air consisting of the inside air after dehumidification and the outside air having a relatively low humidity, the anti-fog property of the windshield can be achieved. . In addition, on the first air passage (11) side,
By introducing only the inside air that has a smaller ventilation load and heating load than the outside air, this vehicle air conditioner case (1)
The amount of introduced inside air can be further increased, and the heating performance can be enhanced more effectively.

Further, in the invention according to the fifth aspect, there is provided a judging means (89) for judging a condition for blowing out low-humidity conditioned air from the defroster outlet (7), and this judging means (89).
When the above condition is determined in, the electric element (8) is activated. As a result, when dehumidification is required, the electric element (8) can be automatically activated, so that the operation load on the occupant can be reduced, and
Dehumidification by the electric element (8) can be automatically realized when necessary.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (First Embodiment) The vehicle air conditioner of the first embodiment is mounted in, for example, a diesel vehicle equipped with a diesel engine. Diesel engines generally have a lower calorific value than gasoline engines, and thus are not able to provide sufficient heating capacity in winter.

The schematic structure of the vehicle air conditioner of this embodiment will be described below with reference to FIG. FIG. 1 is a schematic cross-sectional view of a vehicle air conditioner, and the front side of the drawing coincides with the upward direction of the vehicle. This vehicle air conditioner includes a case 1 that forms an air passage for sending air toward the vehicle interior.
An outside air introduction port 2, a first inside air introduction port 31, and a second inside air introduction port 32 are provided on one end 1a side of the case 1, and a foot for blowing conditioned air to the occupant's feet is provided on the other end 1b side. A blower outlet 5, a face blower outlet 6 that blows the conditioned air to the upper half of the occupant, and a defroster blower outlet 7 that blows the conditioned air to the windshield are provided.

Inside the one end 1a side of the case 1, the outside air guide passage 13 through which at least the outside air from the outside air introduction port 2 flows and the inside air from at least the first inside air introduction port 31 are provided by the first partition member 10 '. And the inside air guide passage 14 through which the air flows. Then, the Peltier element composite body (electrical element) 8 which is the main part of the present invention is disposed on the first partition member 10 '. The Peltier element composite body 8 radiates heat to the outside air in the outside air guide passage 13 to heat the outside air and absorb heat from the inside air in the inside air guide passage 14 to cool and dehumidify the inside air. The structure of the Peltier element composite body 8 will be described later in detail. Also,
In the case 1, a drain port (not shown) for water droplets adhering to the Peltier element composite body 8 is formed in a portion located below the Peltier element composite body 8, that is, on the back side of the paper surface of FIG.

On the air downstream side of the Peltier element composite body 8, first and second inside / outside air switching doors 9a and 9b are arranged. The first inside / outside air switching door 9a adjusts the outside air introduction amount from the outside air guide passage 13 and the inside air introduction amount from the inside air guide passage 14, and the second inside / outside air change door 9b adjusts the outside air guide passage 1
The outside air introduction amount from 3 and the inside air introduction amount from the second inside air introduction port 32 are adjusted.

The first and second inside / outside air switching doors 9a,
A blower 4 is arranged on the air downstream side of 9b. Then, by the second partitioning member 10 provided on the downstream side of the blower (blowing means) 4, the first air passage 11 that connects the first blower unit 41 of the blower 4 and the foot outlet 5 to each other.
And a second air passage 12 that communicates the second blower 42 of the blower 4 with the face outlet 6 and the defroster outlet 7.

The blower 4 sucks in the air on the side of the first inside / outside air switching door 9a and sucks in the air on the side of the second inside / outside air switching door 9b and the first blower 41 for sending this air to the side of the first air passage 11. , And a second air blower 42 that sends this air to the second air passage 12 side, and the motor 43 rotates the first and second air blowers 41, 42 at the same time. And
On the air downstream side of the blower 4, the first and second air passages 11,
An evaporator 20 is arranged so as to block the entire surface of the heater 12. At the air downstream side of the evaporator 20, a heater core (heating heat for heating is provided so as to block a part of the first and second air passages 11 and 12). (Exchanger) 22 is provided. Specifically, the heater core 22 includes the first and second air passages 11 and 1
About 2 half of the second partition plate 10 side is closed, and bypass passages 23a, 23b are formed in the upper and lower parts of the heater core 22 in FIG. 1 in the case 1.

Then, on the air downstream side of the evaporator 3,
In addition, the bypass passage 23 is provided at the air mix doors 21a and 21b arranged on the air upstream side of the heater core 4.
The blown air temperature is adjusted by adjusting the air flow rate sent to the heater cores 22a and 23b. The air mix doors 21a and 21b are simultaneously driven so as to open and close in line symmetry about the second partition member 10.

Further, a foot switching door 51, a face switching door 61, and a defroster switching door 71 are provided at the foot outlet 5, the face outlet 6, and the defroster outlet 7, respectively. The air outlets 5, 6, 7 are opened and closed by the doors 51, 61, 71. Further, the second partition member 10 has a first air passage 11
And an opening 10a communicating with the second air passage 12 is formed. The foot switching door 51 has the opening 10a.
A is opened and closed at the same time.

An instrument panel (not shown) provided on the front surface of the vehicle compartment has an operation unit for the air conditioner, and this operation unit is provided with a blowout mode changeover switch 90 for changing over the blowout mode. The blowing mode changeover switch 90 is selected and operated by an occupant. In the blowing mode, conditioned air is blown mainly from the foot outlet 5.
Foot mode that blows out a small amount from the defroster outlet 7.
The foot diff mode, in which almost the same amount of conditioned air is blown from the foot outlet 5 and the defroster outlet 7, the defroster outlet 7
There are a defroster mode in which the air conditioning air is blown out from the air outlet, a bi-level mode in which almost the same amount of air conditioning air is blown out from the face air outlet 6 and the foot air outlet 5, and a face mode in which air conditioning air is blown out from the face air outlet 6.

When the output signal of the blowout mode changeover switch 90 is input to the control device 89, the foot changeover door 51 and the face changeover door 6 corresponding to each of the above modes.
1, the defroster switching door 71 and the first and second inside / outside air switching doors 9a and 9b are driven and controlled by the control device 89. In addition, the switch 87 of the Peltier element composite body 8 of the present embodiment
The on / off of is also controlled by the control device (determination means) 89. Specifically, when a mode in which it is necessary to maintain the antifogging property while effectively reducing the heating load, in the present embodiment, the foot mode or the foot differential mode is selected by the blowout mode changeover switch 90, Control device 89
The switch 87 of the Peltier element complex 8 is controlled to be turned on.

Next, the structure of the Peltier element composite body 8 which is the main part of this embodiment will be described in detail with reference to FIGS. FIG. 2A shows a module structure 8a composed of Peltier elements, and FIG. 2B shows one unit of the Peltier element composite body 8. First, as shown in FIG. 2A, in a module structure 8a composed of Peltier elements, a p-type semiconductor 81 and an n-type semiconductor 82 are connected in series by electrodes 83, and a rectangular alumina insulating substrate 84a, 84b
It consists of sandwiched between. Then, from the n-type semiconductor 82 to p
The electrode 83a in the portion where the current flows to the semiconductor chip 81 is shown in FIG.
(A) The electrode 83b at the portion where the current flows from the p-type semiconductor 81 to the n-type semiconductor 82 is collected on the side of the lower alumina insulating substrate 84a in the middle of FIG.
Collecting to the side.

Then, as shown in FIG. 2B, the aluminum fins 8 are provided on the alumina insulating substrates 84a and 84b of the module structure 8a via the aluminum substrates 85a and 85b.
By attaching 6a and 86b, one unit of the Peltier element composite body 8 of the present embodiment is constituted. In addition,
On the surfaces of the aluminum substrates 85a and 85b, a thin film (not shown) made of a material having excellent thermal conductivity, such as silver or silicon, is formed. A thin film made of an insulating material having excellent thermal conductivity is also formed on the alumina insulating substrates 84a and 84b. As a result, the module structure 8a and the fin 86 are
Good heat transfer between a and 86b.

When a current is passed through the module structure 8a, the electrode 83a radiates heat due to the Peltier effect, and the electrode 8a
Endotherm occurs in 3b. At this time, the heat absorption amount and the heat radiation amount are the same. Therefore, for example, by forcibly increasing the heat radiation amount on the heat radiation side, the heat absorption amount on the heat absorption side can also be increased. Here, the alumina insulating substrates 84a and 84b, the aluminum substrate 85
Since the a, 85b and the fins 86a, 86b are made of a material having good thermal conductivity, the electrode 83a absorbs heat on the fin 86a side through the alumina insulating substrate 84a and the aluminum substrate 85a, and the electrode 83b is generated. The generated heat is transmitted to the fin 86b side through the alumina insulating substrate 84b and the aluminum substrate 85b.

Then, in FIG. 3, the module structure 8
The Peltier element composite body 8 is one in which a plurality of the above units are electrically connected in parallel so that a is arranged on one plane.
The Peltier element composite body 8 is provided on the first partition member 10 ′ so that 6b is arranged on the outside air guide path 13 side. When an electric current is passed through the Peltier element composite body 8, the Peltier element composite body 8 absorbs the heat of the inside air introduced into the inside air guide passage 14, cools and dehumidifies the inside air, and guides the outside air. Heat is released to the outside air introduced into the passage 14, and the outside air is heated. The power source of the Peltier element complex 8 is taken from the vehicle battery 88.

Next, the operation of this embodiment having the above configuration will be described. In FIG. 1, a blowout mode changeover switch 90
When the foot mode is selected by, the first inside / outside air switching door 9a introduces only the inside air from the second inside air inlet 32 into the first air passage 11, and the second inside / outside air switching door 9b opens the outside air guide path. The controller 89 so that the outside air from the inside 13 and the inside air from the inside air guide passage 14 are introduced into the second air passage 12.
Is controlled by

At the same time that the foot outlet 5 is opened by the foot switching door 51, the opening 10a of the second partition member 10 is closed, and the face outlet 6 is closed by the face switching door 61. The defroster outlet 7 is slightly opened by the defroster switching door 71, the bypass passages 23a, 23b are closed by the air mix doors 21a, 21b during maximum heating, and all the air that has passed through the evaporator 20 passes through the heater core 22. It is controlled by the control device 89.

The heat of the relatively humid inside air in the inside air guide passage 14 is absorbed by the Peltier element composite body 8 through the fins 86a on the heat absorption side of the Peltier element composite body 8, and the fins 86b on the heat radiation side are absorbed. Since the heat generated by the Peltier element composite body 8 is radiated to the outside air in the outside air guide path 13 having a relatively low humidity, the outside air is heated. here,
Input power to Peltier element composite body 8 is 200-300W
It is a degree.

Then, in the vicinity of the fins 86a on the heat absorption side,
The water vapor contained in the inside air is condensed to form condensed water. Then, the condensed water adheres to the surface of the fins 86a, falls down along the fins 86a, and is discharged to the outside of the vehicle through the drain port formed below the Peltier element composite body 8 in the case 1. . In this way, the inside air guideway 14
The inside air inside is dehumidified, and the dehumidified inside air is
It is introduced into the second air passage 12. Further, the absorbed heat is radiated to the outside air in the outside air guide path 13, and the heated outside air is also introduced into the second air passage 12. $$ Further,
The Joule heat generated in the module structure 8a including the Peltier element is also released to the outside air having a lower temperature than the inside air.

Here, in FIG. 4, the theoretical coefficient of performance COP (= Q / W, Q: amount of heat transfer from the heat absorbing side to the heat radiating side of the Peltier element of the Peltier element module structure, W: to the Peltier element). (Reference input: Kinichi Uemura, Isao Nishida, Thermoelectric semiconductors and their applications, Nikkan Kogyo Shimbun). In this graph, the horizontal axis represents the temperature difference between the heat radiation side temperature and the heat absorption side temperature of the module structure 8a. From this graph, it can be seen that the coefficient of performance decreases as the temperature difference increases.

As described above, the heat radiating side of the Peltier element composite body 8 radiates heat to the outside air (about -10 ° C. to 0 ° C.) having a relatively low temperature, and the heat absorbing side of the Peltier element composite body 8 is
It absorbs heat from relatively high temperature inside air (about 25 ° C). That is, the heat radiation side of the Peltier element composite body 8 is cooled by the outside air, and the heat absorption side of the Peltier element composite body 8 is heated by the inside air. Therefore, the temperature difference between the heat radiation side and the heat absorption side of the Peltier element composite body 8 is small. can do.

When the input power to the Peltier element composite body 8 is about 200 to 300 W, the temperature difference is 0.
It has been confirmed by the present inventors that the temperature is about 10 ° C. That is, in the present embodiment, by disposing the fins 86b on the heat dissipation side of the Peltier element composite body 8 in the outside air guide passage 13 and the fins 86a on the heat absorption side in the inside air guide passage 14,
The coefficient of performance COP of the Peltier element composite body 8 can be operated with high efficiency of 3 or more.

Therefore, even if the temperature difference between the inside air and the outside air is small, on the heat absorbing side of the Peltier element composite body 8, the dehumidifying capacity can be sufficiently exerted, so that the inside air having a relatively high humidity is absorbed to cool the inside air. The dehumidification can be effectively performed. Then, by blowing out the conditioned air consisting of the inside air after the dehumidification and the outside air having a relatively low humidity from the defroster outlet 7, the anti-fog property of the windshield can be achieved.

Further, by absorbing heat from the inside air in the inside air guide passage 14, the heating load of the inside air becomes large. On the other hand, by radiating the outside air in the outside air guide passage 13 to the heating load of the outside air. It is decreasing. Therefore, case 1
In the inside, the increase of the heating load on the inside air side can be offset by the reduction of the heating load on the outside air side. On the other hand, since the Peltier element composite body 8 can sufficiently exhibit the dehumidifying ability, it is possible to effectively dehumidify the inside air and sufficiently increase the amount of the inside air introduced into the second air passage 12. Then, the inside air having a small heating load after dehumidification is introduced into the second air passage 12 that needs to form low-humidity conditioned air, and the dehumidification from the second inside air introduction port 32 is performed in the first air passage 11. By introducing the inside air that has not been introduced, the amount of the inside air introduced into the case 1 can be sufficiently increased, and the heating performance can be effectively enhanced.

Further, since the input power of the Peltier element composite body 8 is about 200 to 300 W, the power source of the Peltier element composite body 8 can be easily obtained from the vehicle battery 88. In the above operation, the case where the Peltier element composite body 8 is operated in the foot mode has been described, but also in the defroster mode, the Peltier element composite body 8 is operated and the inside air and the outside air are introduced into the second air passage 12. To control the first and second inside / outside air switching doors 9a and 9b. As a result, the same effect as in the foot mode can be obtained.

In the face mode, the bi-level mode, and the defroster mode, when it is necessary to blow out low-humidity conditioned air from the face outlet 6 or the defroster outlet 7, these modes are different from the foot mode and the foot diff mode. Since the heating capacity is not required so much, the Peltier element composite body 8 is not operated, and only the outside air from the outside air introduction port 2 is introduced into the second air passage 12 by the second inside / outside air switching door 9b. Controlled by 89.

(Second Embodiment) In the second embodiment,
As shown in FIG. 5, the first partition member 10 ′ in the first embodiment extends from the boundary line between the first blower section 41 and the second blower section 42 of the blower 4 to the air upstream side of the evaporator 20. The second partitioning member 10 is arranged so as to extend from a little lower side of the first partitioning member 10 ′ in FIG. 5 to the central portion of the side surface of the evaporator 20. Then, the Peltier element composite body 8 is arranged on the first partition member 10 ′.

In the foot mode, as shown in FIG. 5, the first and second inside / outside air switching doors 9a and 9b introduce the inside air into the first air blowing section 41 and the outside air into the second air blowing section 2. Will be introduced. Then, on the downstream side of the blower 4,
The inside air is introduced from the first air blower 41 into the inside air guide passage 14 below the first partition member 10 ′ in FIG. 5, and the second air blow is introduced into the outside air guide passage 13 above the first partition member 10 ′ in FIG. Part 4
Outside air is introduced from 2.

The heat absorbing side fins 86a of the Peltier element composite body 8 cools and dehumidifies the inside air, and the heat radiation side fins 86b heats the outside air, and the dehumidified inside air and the heated outside air are mixed. Air heater core 22
It is heated at and is blown out from the defroster outlet 7. According to the second embodiment, as in the first embodiment, the amount of introduced inside air into the second air passage 12 can be sufficiently increased, so that the heating performance can be effectively improved. Here, the introduction ratio of the inside air in the total amount of air introduced to the second air passage 12 side is determined by the arrangement of the first partition member 10 ′ and the second partition member 10 described above, and this introduction ratio is predetermined. Case 1 is designed in advance so that the introduction ratio is obtained.

By arranging the Peltier element composite body 8 immediately in front of the evaporator 20, the outlet for water droplets adhering to the Peltier element composite body 8 is attached to the evaporator 20 originally provided in the vicinity of the evaporator 20. Can be shared with the water drop outlet. (Third Embodiment) In the third embodiment, as shown in FIG. 6, one end 1a of the case 1 is provided with an outside air introduction port 2 and an inside air introduction port 3, and the first embodiment described above. The first partitioning member 10 'referred to above is arranged on the air downstream side of the inlets 2 and 3. An inside / outside air switching door 9 is provided on the air downstream side of the Peltier element composite body 8.

In the foot mode, as shown in FIG. 6, the inside air is introduced into the inside air guide passage 14 and the outside air is introduced into the outside air guide passage 13, and the fins 86 on the heat absorption side of the Peltier element composite body 8 are introduced.
Inside air is cooled and dehumidified by a, and fins 86b on the heat radiation side
The outside air is heated by. Then, the inside / outside air switching door 9 causes the second air blower 42 to mix air with the heated outside air and a small amount of dehumidified inside air into the heater core 2
It is heated at 2 and blown from the defroster outlet 7.

According to the third embodiment, as in the first embodiment, the amount of introduced inside air into the second air passage 12 can be sufficiently increased, so that the heating performance is effectively improved. You can Further, since there is only one inside / outside air switching door 9, the cost is reduced. (Fourth Embodiment) In the third embodiment, the case 1 is used.
The inside was divided into the first air passage 11 and the second air passage 12, but in the fourth embodiment, as shown in FIG. 7, the second partition member 10 (see FIG. 6) is eliminated. , The first partition member 10 ′ only in the vicinity of the outside air inlet 2 and the inside air inlet 3
Are arranged. Along with this, the blower 4 has the blower unit 4
The heater core 22 is arranged closer to the lower side in FIG. 7, and the number of the air mix doors 21 is one.

In the foot mode, as shown in FIG. 7, the inside air is introduced into the inside air guide passage 14 and the outside air is introduced into the outside air guide passage 13, and the fins 86 on the heat absorption side of the Peltier element composite body 8 are introduced.
Inside air is cooled and dehumidified by a, and fins 86b on the heat radiation side
The outside air is heated by. Then, by the inside / outside air switching door 9, a large amount of the heated outside air and a small amount of the dehumidified inside air are introduced to the blower 4 side, and the air in which the outside air and the inside air are mixed is heated by the heater core 22. Blowing from the defroster outlet 7 and the foot outlet 5.

According to the fourth embodiment, the inside of the case 1 has a first air passage 11 (see FIG. 6) and a second air passage 12 therein.
(See FIG. 6) In a vehicle air conditioner that is not divided into the interior air guide passage 14 and the Peltier element composite body 8.
Since the inside air in the inside can be effectively dehumidified and the amount of introduced inside air into the case 1 can be sufficiently increased, the heating performance can be effectively improved.

(Fifth Embodiment) In the first to fourth embodiments, the inside air guide path 14 and the outside air guide path 13 are arranged in parallel as shown in FIG. Then, as shown in FIG. 8, the inside air guide path 14 and the outside air guide path 13 are arranged so as to be orthogonal to each other. Then, the Peltier element composite body 8 is arranged in a portion where the inside air guide path 14 and the outside air guide path 13 are orthogonal to each other.

Specifically, the outside air is the Peltier element composite body 8.
8, the inside air flows from the front side to the back side in FIG. 8, and the inside air flows from the right side to the left side in FIG. 8 of the Peltier element composite body 8.
The heat absorbing side fins 86a and the heat radiating side fins 86b are arranged alternately and orthogonally to each other. That is, the fins 86a on the heat absorption side of a certain module structure 8a
Are shared with the fins 86a on the heat absorption side of the module structure 8a adjacent to the module structure 8a, and thus, for example, four module structures 8a are laminated.

As a result, the inside air flowing from the right side to the left side in FIG. 8 is absorbed and dehumidified by passing through the heat absorbing side fins 86a, and the outside air flowing from the front side to the back side in FIG. To be heated. And in FIG.
The case 1 in which the Peltier element composite body 8 of the present embodiment is incorporated is shown in FIG. In FIG. 9, the vertical direction of the drawing corresponds to the actual vertical direction, and 100 is a partition plate that separates the engine room from the vehicle interior.
Reference numerals 1 and 12 are bent to the right side of the drawing at the back side of the drawing to guide the conditioned air into the passenger compartment.

In this case 1, a third inside air introducing port 33 is formed in addition to the first and second inside air introducing ports 31 and 32. Further, inside the case 1, dust and odors of inside air and outside air are removed. In order to do so, a pleated filter 101 is provided. Further, an outlet 1c for the condensed water of the Peltier element complex 8 is also formed. The outside air introduction port 2 and the second inside air introduction port 32 are provided with opening / closing doors 2a and 32a for opening and closing the outside air and the second inside air introduction ports 2 and 32, respectively, and on the downstream side of the Peltier element composite body 8, An opening 80 is provided as an air passage after passing through the Peltier element composite body 8, and an opening / closing door 80a is also provided in the opening 80. Further, an inside / outside air switching door 9 is arranged between the outside air introduction port 2 and the third inside air introduction port 33.

In the foot mode and the foot differential mode, the Peltier element composite body 8 is operated to open the outside air introduction port 2 with the opening / closing door 2a, and the inside / outside air switching door 9 is opened.
The third inside air inlet 33 is closed, and the opening 80 is opened by the opening / closing door 80a to introduce the dehumidified inside air and the heated outside air into the second air passage 12. When heating is not required, the Peltier element composite body 8 is not operated, the open / close door 2a closes the outside air introduction port 2, and the inside / outside air switching door 9
The third inside air introducing port 33 is opened, and the opening 80 is closed by the opening / closing door 80a, and the above dehumidification and heating are not performed.

Here, when the temperature of the outside air is extremely low (-
20 ° C.), the amount of heat radiation from the fins 86b (see FIG. 8) on the heat radiation side of the Peltier element composite body 8 becomes extremely large,
Along with this, the heat absorption amount on the heat absorption side fins 86a (see FIG. 8) also becomes very large, and the heat absorption side fins 86a
Condensed water adhering to may be frozen. On the other hand, in the fin 86a on the heat absorption side of the Peltier element composite body 8,
If a temperature sensor (not shown) is provided and the temperature detected by this temperature sensor reaches the freezing temperature of the condensed water, for example, about -3 ° C,
Move the opening / closing door 2a in the direction to close the outside air inlet 2,
Reduce the amount of outside air introduced. As a result, the amount of heat radiation on the heat radiation side of the Peltier element composite body 8 decreases, and the amount of heat absorption on the heat absorption side decreases accordingly, and the temperature of the fins 86a on the heat absorption side rises, preventing the condensation water from freezing. it can.

When the temperature detected by the temperature sensor is sufficiently higher than the freezing temperature of the condensed water and the temperature at which the dehumidifying capacity can be further increased, for example, about 3 ° C., the opening / closing door 2a is opened in the direction to open the outside air inlet 2. Move to increase the amount of outside air introduced. As a result, the temperature of the fins 86a on the heat absorbing side is lowered, so that the dehumidifying ability can be further improved. (Other Embodiments) In the first embodiment, in the foot mode and the foot differential mode, the Peltier element composite body 8 is operated to introduce the inside air and the outside air into the second air passage 12. The invention is not limited to this, and when it is preferable to blow out warmer air-conditioning air from the defroster outlet 7 as in the winter defroster mode, the Peltier element composite 8 is operated, The inside air and the outside air may be introduced into the second air passage 12. As a result, the heating load of the air in the second air passage 12 can be reduced as compared with the case where only the outside air is introduced into the second air passage 12, and this air can be efficiently heated by the heater core 22.

In the first to fourth embodiments described above, when the evaporator 20 is not operating and it is necessary to blow out low-humidity conditioned air from the defroster outlet 7, the Peltier element composite body 8 is formed. The control device 89 may control the switch 87 to be in the ON state. Further, in the fifth embodiment, the module structure 8
The Peltier element composite body 8 is formed by laminating four a, but the present invention is not limited to this, and the Peltier element composite body 8 may be formed by one module structure 8a. The Peltier element composite body 8 may be formed by stacking five or more module structures 8a.

Further, in the fifth embodiment, the outside air introduction port 2, the outside air guide passage 13, the first inside air introduction port 31, and the inside air guide passage 14 are formed integrally with the case 1, but they are provided separately. You may form. Further, in the above-described embodiment, the inside air guide path 14 and the outside air guide path 13 are arranged in parallel or orthogonal to each other, but they are arranged so that the inside air guide path 14 and the outside air guide path 13 face each other. Good.

Further, the module structure 8a of the above embodiment.
In FIG. 2B, a heat insulating member for insulating the heat absorbing side and the heat radiating side may be provided in the space between the heat absorbing side and the heat radiating side. This heat insulating member is a material with poor heat conductivity,
For example, it is formed of urethane foam or the like. This allows
It is possible to prevent heat exchange between the heat absorbing side and the heat radiating side between the heat absorbing side and the heat radiating side, and prevent a difference in temperature between the heat absorbing side and the heat radiating side from becoming small.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a vehicle air conditioner showing a first embodiment of the present invention.

FIG. 2A is a perspective view showing a module structure of a Peltier element, and FIG. 2B is a perspective view showing one unit of a Peltier element composite.

FIG. 3 is a perspective view showing a mounting structure of a Peltier element composite body.

FIG. 4 is a graph showing the coefficient of performance of the module structure of the Peltier device.

FIG. 5 is a schematic cross-sectional view of a vehicle air conditioner showing a second embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of a vehicle air conditioner showing a third embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of a vehicle air conditioner showing a fourth embodiment of the present invention.

FIG. 8 is a perspective view showing a mounting structure of a Peltier element composite body according to a fifth embodiment of the present invention.

FIG. 9 is a schematic cross-sectional view of a vehicle air conditioner showing a fifth embodiment of the present invention.

[Explanation of symbols]

2 ... Outside air introduction port, 31 ... First inside air introduction port, 32 ... Second inside air introduction port, 4 ... Blower (blower means), 5 ... Foot outlet, 7 ... Defroster outlet, 8 ... Peltier element (electric element) , 13 ... Outside air guide passage, 14 ... Inside air guide passage, 22 ... Heater core (heating heat exchanger).

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Koji Nonoyama, 1-1, Showa-cho, Kariya city, Aichi prefecture, Nihon Denso Co., Ltd. (72) Inventor, Sugimitsu, 1-1, Showa-cho, Kariya city, Aichi prefecture, Nippon Denso Co., Ltd. Incorporated (72) Inventor Manabu Miyata 1-1, Showa-cho, Kariya city, Aichi Nihon Denso Co., Ltd. (72) Inventor Yuichi Shirota 1-1, Showa-cho, Kariya city, Aichi Nihon Denso Co., Ltd.

Claims (5)

[Claims] 1. An outside air introduction port (2) for introducing outside air and an inside air introduction port (31, 31) for introducing inside air at one end (1a).
32, 3), and the other end (1b) has a defroster outlet (7) for blowing out conditioned air to the inner surface of the windshield.
And a case (1) having at least a foot outlet (5) for blowing conditioned air to the feet of an occupant; and a case (1) disposed in the case (1) and extending from the one end (1a) to the other end (1b). A blower (4) for generating an air flow, and an outside air guide passage (13) formed in the case (1) for introducing outside air from at least the outside air introduction port (2) to the other end (1b) side. The inside air guide passage (1) formed near the outside air guide passage (13) in the case (1) and introducing the inside air from at least the inside air introduction ports (31, 32, 3) to the other end (1b) side.
4), the inside air guide path (14) and the outside air guide path (13)
Of the heating heat exchanger (22) for heating the air in the case (1), the outside air guide passage (13) and the inside air guide passage (14). And an electric element (8) that is electrically energized to absorb heat from the inside air flowing through the inside air guide passage (14) and radiate the outside air flowing through the outside air guide passage (13). A vehicle air conditioner characterized by: 2. The vehicle air conditioner according to claim 1, wherein the inside air is formed in the case (1), at least one of the inside air is introduced from the inside air introduction ports (32, 3), and the other end is formed. A first air passage (1) communicating with the foot outlet (5)
1) and inside the case (1), at least one of the inside air from the inside air guide passage (14) and the outside air from the outside air guide passage (13) is introduced into one end, and the other end is the defroster outlet. A second air passage (12) communicating with (7), the first air passage (11) and the second air passage (12)
And a partition member (10) for partitioning and forming, and the heat exchanger (22) for heating is arranged in the first and second air passages (11, 12). An air conditioner for a vehicle, which heats the conditioned air in the air passages (11, 12). 3. The vehicle air conditioner according to claim 1, wherein the inside air inlet is a first inside air inlet (31) and a second inside air inlet (31).
The inside air introduction port (32), the inside air guide passage (14) is configured to introduce at least the inside air from the first inside air introduction port (31) to the other end (1b) side, the case ( 1) is formed in the first air passage (1), which is formed in the inside thereof and at least one of which is introduced with the inside air from the second inside air introduction port (32) and the other end of which is in communication with the foot outlet (5).
1) and inside the case (1), at least one of the inside air from the inside air guide passage (14) and the outside air from the outside air guide passage (13) is introduced into one end, and the other end is the defroster outlet. A second air passage (12) communicating with (7), the first air passage (11) and the second air passage (12)
And a partition member (10) for partitioning and forming, and the heat exchanger (22) for heating is arranged in the first and second air passages (11, 12). An air conditioner for a vehicle, which heats the conditioned air in the air passages (11, 12). 4. A partition member (10 ′) for partitioning and forming the outside air guide path (13) and the inside air guide path (14) is provided, and the electric element (8) is provided in the partition member (10 ′). The vehicle air conditioner according to any one of claims 1 to 3, which is provided. 5. A determination means (89) for determining a condition for blowing out low-humidity conditioned air from the defroster outlet (7) is provided, and when the determination means (89) determines the condition, the electric element ( 8) The vehicle air conditioner according to any one of claims 1 to 4, which is operated.