JP2010111170A - Vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air conditioner having a simple configuration, which, when introducing outside air, introduces the outside air partially mixed with inside air, without degrading air conditioning efficiency. <P>SOLUTION: The vehicular air conditioner 1A includes a blowing path 2 having an outside air introduction port 3 and an inside air introduction port 4, a blower 6 for sucking in the air into the blowing path 2, an evaporator 7 and a heater core 8 for turning the air sucked in by the blower 6 into desired conditioned air, and blow-out openings 10a, 10b, 10c for supplying the conditioned air into the interior of the vehicle. The vehicular air conditioner 1A has an inside air duct 20 having an inside air suction inlet 21 at one end thereof opening out to an outer surface of an instrument panel 30 and an inside air suction outlet 22 at the other end thereof opening to an upstream side of the blower 6 in the blowing path 2; and an indoor temperature sensor S for sensing a temperature of the inside air sucked into the inside air duct 20. The inside air suction outlet 22 of the inside air duct 20 is arranged at a position which becomes a negative pressure with respect to the outside air introduction port 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air conditioner for a vehicle that introduces a portion of the inside air together with the outside air when the outside air is introduced into the air passage.

  A conventional vehicle air conditioner of this type is disclosed in Patent Document 1. As shown in FIG. 6, the vehicle air conditioner 100 includes an air passage 101. An outside air inlet 103 and an inside air inlet 104 that are opened and closed by an intake door 102 are provided at the most upstream position of the air passage 101. The outside air introduction port 103 introduces outside air outside the vehicle, and the inside air introduction port 104 introduces inside air inside the instrument panel 105.

  A blower 110, an evaporator 111, and a heater core 112 are disposed in the air passage 101. Various air outlets 106 a, 106 b, 106 c that open into the passenger compartment are provided at the most downstream position of the air passage 101.

  A circulation duct 120 is connected to the air passage 101. One end of the circulating duct 120 is opened at a downstream position of the heater core 112 in the air passage 101, and the other end is opened at an upstream position of the blower 110 in the air passage 101. An aspirator 121 is provided in the middle of the reflux duct 120. A downstream end of the inside air duct 122 is connected to the suction side of the aspirator 121. The upstream end of the inside air duct 122 is opened on the outer surface of the instrument panel 105. An indoor temperature sensor 123 is disposed at the opening position of the inside air duct 122.

  In the vehicle air conditioner 100, when the outside air is introduced, the intake door 102 is positioned at a switching position (position in FIG. 6) that closes the inside air introduction port 104 and opens the outside air introduction port 103. Is sucked into the air passage 101. The sucked outside air is made into conditioned air at a desired temperature by the evaporator 111 and the heater core 112, and the conditioned air is blown out from the at least one outlet 106a, 106b, 106c into the vehicle interior.

  Further, the conditioned air flowing in the air passage 101 partially flows from the inlet 120a of the circulating duct 120 due to the air pressure, passes through the aspirator 121, and then the upstream side of the blower 110 in the air duct 101 from the outlet 120b of the circulating duct 120. Returned to The conditioned air passes through the aspirator 121 and the downstream side of the aspirator 121 is depressurized, whereby the inside air is sucked into the inside air duct 122, and the sucked inside air passes through the circulation duct 120 to the upstream position of the blower 110 in the air passage 101. Supplied.

As described above, at the time of introduction of outside air, heating or cooling operation with reduced air conditioning load can be performed by partially introducing the inside air together with the outside air into the air blowing path 101. Moreover, since the indoor temperature sensor 123 is disposed in the internal airflow, and the internal air is sucked from the outer surface of the instrument panel 105, that is, the internal air closer to the passenger, the indoor temperature sensor 123 is Detects the optimum inside air temperature as air-conditioning inside air temperature data.
JP 2006-282080 A

  However, the conventional vehicle air conditioner 100 has a problem that the configuration is complicated because the aspirator 121 is provided to distribute the inside air to the inside air duct 122.

  In addition, when a part of the conditioned air created in the air passage 101 is returned to the upstream side of the air passage 101 by the circulating duct 120 before a part of the air conditioned air created in the air passage is blown out into the vehicle interior, In comparison, there is a problem that the air conditioning efficiency is deteriorated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle air conditioner that has a simple configuration and that does not deteriorate air conditioning efficiency.

  The invention of claim 1 that achieves the above object is characterized in that an outside air introduction port for introducing outside air and an air passage having an inside air introduction port for introducing inside air, which is air in the vehicle interior, are arranged in the air passage and sucks air. A blower, a heat source for air conditioning that is arranged in the air passage and uses the air sucked by the blower as a desired conditioned air, and a blower outlet that supplies the conditioned air adjusted in temperature by the heat source for air conditioning into the vehicle interior An air conditioner for a vehicle provided with an inside air suction inlet at one end opened at the outer surface of the instrument panel, and an inside air duct at the other end opened at a position upstream from the blower in the air passage; Room temperature detecting means for detecting the temperature of the inside air sucked into the inside air duct, and the inside air suction outlet of the inside air duct is opened at a position where a negative pressure is generated with respect to the outside air inlet. Toss .

  A second aspect of the present invention is the vehicle air conditioner according to the first aspect, wherein the inside air suction outlet is closer to the blower than the outside air introduction port and faces in the same direction as the outside air introduction port. It is characterized by being opened.

  A third aspect of the present invention is the vehicle air conditioner according to the first aspect, wherein the vehicle has an intake door that can selectively open and close the outside air introduction port and the inside air introduction port, and the intake door includes the inside air introduction device. In the closed position of the mouth, wind pressure caused by outside air from the outside air introduction port is configured not to act on the inside air suction port.

  According to the first aspect of the present invention, when the outside air is introduced, the inside air suction outlet of the inside air duct has a negative pressure from the outside air introduction port, so that the inside air can be reliably sucked into the inside air duct by the suction force of the blower. Since there is no need to attach a, the configuration is simple. Moreover, since all the conditioned air created in the air passage is blown into the vehicle interior from the outlet and used for air conditioning in the vehicle interior, the air conditioning efficiency does not deteriorate. As described above, a vehicle air conditioner that has a simple configuration and that does not deteriorate air conditioning efficiency can be provided by introducing a part of the inside air together with the outside air when the outside air is introduced.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the inside air suction outlet does not receive the ram pressure of the outside air flowing in from the outside air introduction port, the outside air flows into the room through the inside air duct by the ram pressure. It is possible to prevent problems such as direct entry.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1, since the inside air suction outlet does not receive the ram pressure of the outside air flowing in from the outside air introduction port, the outside air passes through the inside air duct into the room by the ram pressure. It is possible to prevent problems such as direct entry.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 and 2 show a first embodiment of the present invention, FIG. 1 is a configuration diagram of an air conditioner 1A for a vehicle when an outside air is introduced, and FIG. 2 is a configuration diagram of an air conditioner 1A for a vehicle when an inside air is introduced. is there.

  As shown in FIGS. 1 and 2, the vehicle air conditioner 1 </ b> A has an air conditioning case 1 disposed inside an instrument panel 30. The air conditioning case 1 has an air conditioning case main body 1a and an intake case 1b, and an air passage 2 is formed in the cases 1a and 1b. The intake case portion 1b upstream of the air passage 2 has an outside air introduction port 3 for introducing outside air, which is air outside the vehicle compartment, and inside air, which is air inside the vehicle compartment (specifically, air inside the instrument panel 30). Is provided. The outside air inlet 3 and the inside air inlet 4 are opened and closed by an intake door 5. The intake door 5 moves between an outside air introduction position, which is the position shown in FIG. 1, and an inside air introduction position, which is the position shown in FIG.

  In the air passage 2 of the air conditioning case main body 1a, an evaporator 7 and a heater core 8 which are heat sources for air conditioning are arranged in this order together with the blower 6. The evaporator 7 is a cooling source, the heater core 8 is a heating source, and a mix door 9 is provided between the evaporator 7 and the heater core 8.

  The blower 6 sucks the inside air and the outside air into the air blowing path 2 by the rotation of the fan. The evaporator 7 is arrange | positioned so that all the ventilation which passes along the ventilation path 2 may pass, and cools ventilation. The heater core 8 is arrange | positioned in the substantially half area | region of the ventilation path 2, and heats ventilation. The mix door 9 can adjust the ratio of the airflow that flows through the heater core 8 and the airflow that bypasses the heater core 8.

  Downstream of the heater core 8, a defroster outlet 10a, a vent outlet 10b, and a foot outlet 10c are provided. The defroster outlet 10a blows out the conditioned air toward the windshield. The vent outlet 10b blows conditioned air toward the upper body of the occupant. The foot outlet 10c blows conditioned air toward the lower body of the passenger. The differential outlet 10a is opened and closed by a differential door 11a. The vent outlet is opened and closed by a 10b vent door 11b. The foot outlet 10c is opened and closed by a foot door 11c.

  The air conditioning case 1 is provided with an inside air duct 20. The inside air duct 20 has an inside air suction inlet 21 on one end side and an inside air suction outlet 22 on the other end side. The inside air suction inlet 21 is opened on the outer surface of the instrument panel 30. The inside air suction outlet 22 is opened at a position upstream of the blower 6 in the blower path 2. The inside air suction outlet 22 is provided at a position closer to the blower 6 than the outside air introduction port 3 and the inside air introduction port 4. Thus, the inside air suction outlet 22 is opened at a position where negative pressure is applied to both the outside air inlet 3 and the inside air inlet 4.

  The room temperature sensor S, which is a room temperature detecting means, is disposed in the vicinity of the room air suction inlet 21 in the room air duct 20. The room temperature sensor S detects the temperature of the inside air sucked into the inside air duct 20. The indoor temperature sensor S is a self-heating type in which the resistance value varies depending on the temperature, and detects an appropriate temperature of air in an environment where air (for example, 1 m / s or more) flows around the room temperature sensor S.

  In the above configuration, as shown in FIG. 1, when the outside air is introduced, the intake door 5 is positioned at a switching position where the inside air introduction port 4 is closed and the outside air introduction port 3 is opened. Thereby, outside air is sucked into the air blowing path 2 from the outside air introduction port 3. The sucked outside air is made into conditioned air at a desired temperature by the evaporator 7 and the heater core 8, and the conditioned air is blown into the vehicle interior from at least one of the outlets 10a, 10b, 10c.

  Moreover, since the inside air suction outlet 22 of the inside air duct 20 becomes a negative pressure with respect to the outside air introduction port 3 by the suction force of the blower 6, the inside air on the outer surface side of the instrument panel 30 passes through the inside air duct 20 to the air blowing path 2. Inflow. Therefore, when the outside air is introduced, a part of the inside air is introduced into the air passage 2 together with the outside air, so that heating or cooling operation with a reduced air conditioning load can be performed.

  On the other hand, as shown in FIG. 2, when the inside air is introduced, the intake door 5 is positioned at a switching position where the outside air introduction port 3 is closed and the inside air introduction port 4 is opened. Thereby, the inside air is sucked into the air blowing path 2 from the inside air introduction port 4. The sucked inside air is made into conditioned air at a desired temperature by the evaporator 7 and the heater core 8, and the conditioned air is blown out from the at least one outlet 10 a, 10 b, 10 c into the vehicle interior.

  Moreover, since the inside air suction outlet 22 of the inside air duct 20 becomes a negative pressure with respect to the inside air introduction port 4 by the suction force of the blower 6, the inside air on the outer surface side of the instrument panel 30 passes through the inside air duct 20 to the air blowing path 2. Inflow.

  As described above, the inside air suction inlet 21 at one end is opened to the outer surface of the instrument panel 30 and the inside air suction outlet 22 at the other end is opened upstream of the blower 6 in the air passage 2, and the inside air And an indoor temperature sensor S for detecting the temperature of the inside air sucked into the duct 20, and the inside air suction outlet 22 is opened at a position where a negative pressure is generated with respect to the outside air inlet 3. Therefore, since the inside air can be reliably sucked into the inside air duct 20 by the suction force of the blower 6 without attaching an aspirator as in the conventional example, the configuration is simple. In addition, all the conditioned air created in the air passage 2 is blown out of any of the air outlets 10a, 10b, 10c into the vehicle interior and used for air conditioning in the vehicle interior, so that the air conditioning efficiency does not deteriorate. As described above, the vehicle air conditioner 1A that has a simple configuration and that does not deteriorate the air-conditioning efficiency can be provided by introducing a part of the inside air together with the outside air when the outside air is introduced.

  Since the inside air always flows through the inside air duct 20 both when the outside air is introduced and when the inside air is introduced, the room temperature sensor S is arranged in the inside air flow (air blowing). Moreover, since the inside air is sucked from the outer surface of the instrument panel 30, that is, the inside air that is closer to the passenger, the indoor temperature sensor S detects the optimum inside air temperature as the inside air temperature data of the air conditioning.

  Further, when the outside air is introduced and the ratio of the inside air introduced into the air passage 2 is suppressed to about 20% of the outside air, an operation for reducing the air conditioning load while preventing window fogging is possible. For example, by adjusting the diameter of the inside air duct 20 itself, the diameter of the inside air suction inlet 21, and the diameter of the inside air suction outlet 22, the inside air suction rate can be suppressed to about 20% of the outside air.

(Second Embodiment)
FIG. 3 is a configuration diagram of a vehicle air conditioner 1B according to the second embodiment of the present invention. As shown in FIG. 3, the vehicle air conditioner 1 </ b> B of the second embodiment is compared with that of the first embodiment, and the inside air suction outlet 22 of the inside air duct 20 is connected to the blower 6 from the outside air inlet 3. It is opened toward the same direction as the outside air inlet 3 at a close position.

  Since other configurations are the same as those of the first embodiment, the same components in the drawings are denoted by the same reference numerals, and description thereof is omitted.

  In the second modified example, since the inside air suction outlet 22 does not receive the ram pressure of the outside air flowing in from the outside air introduction port 3, it is possible to prevent a problem that the outside air directly enters the room through the inside air duct 20 due to the ram pressure.

(Third embodiment)
FIG. 4 is a configuration diagram of a vehicle air conditioner 1C according to the third embodiment of the present invention. As shown in FIG. 4, the vehicle air conditioner 1 </ b> C according to the third embodiment is different from the first embodiment in the configuration of the intake door 23. That is, the intake door 23 is configured such that the door portion 23 b facing the inside air suction outlet 22 is recessed with respect to the door portion 23 a facing the inside air introduction port 4. At the closed position of the inside air inlet 4, the intake door 23 shields the air pressure from the outside air from the outside air inlet 3 from acting on the inside air suction outlet 22 and opens the inside air suction outlet 22 without closing it.

  Since other configurations are the same as those of the first embodiment, the same components in the drawings are denoted by the same reference numerals, and description thereof is omitted.

  In the third modified example, since the inside air suction outlet 22 does not receive the ram pressure of the outside air flowing in from the outside air introduction port 3, it is possible to prevent a problem that the outside air directly enters the room through the inside air duct due to the ram pressure.

(Fourth embodiment)
FIG. 5 is a block diagram showing the principal parts of a vehicle air conditioner 1D according to the fourth embodiment of the present invention. As shown in FIG. 5, the vehicle air conditioner 1 </ b> D of the fourth embodiment has a re-sirk door 24 that opens and closes the inside air suction outlet 22 of the inside air duct 20 as compared with that of the first embodiment. The recirculation door 24 is made of an elastic member such as rubber, and is positioned at the closed position of the inside air suction outlet 22 in a state where it does not receive negative pressure from the blower 6. And if the negative pressure by the air blower 6 is received, it will change to the position (position of FIG. 5) which opens the internal air suction outlet 22 by own bending deformation.

  In the ON state of the vehicle air conditioner 1 </ b> D, the blower 6 is driven, so that the re-sirk door 24 is changed to the open position, and the inside air is supplied from the inside air duct 20 to the blowing path 2. In the off state of the vehicle air conditioner 1D, since the blower 6 is in a stopped state, the re-sirk door 24 is positioned at the closed position.

  Other configurations are the same as those in the first embodiment, and thus a duplicate description is avoided.

  In the fourth embodiment, it is possible to prevent a situation in which the outside air flowing in from the outside air introduction port 3 directly flows into the vehicle interior via the inside air duct 20 in the off state of the vehicle air conditioner 1D.

(Location of inside air suction inlet)
It is more preferable that the inside air suction inlet 21 is set to a position on the outer surface of the instrument panel 30 that is not affected by the blowout temperature of the conditioned air and a position that does not receive heat such as audio.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram at the time of the external air introduction | transduction of the vehicle air conditioner which shows 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram at the time of internal air introduction of the vehicle air conditioner which shows 1st Embodiment of this invention. It is a block diagram of the air conditioning apparatus for vehicles which shows 2nd Embodiment of this invention. It is a block diagram of the air conditioning apparatus for vehicles which shows 3rd Embodiment of this invention. FIG. 9 is a configuration diagram showing a main part of a vehicle air conditioner according to a fourth embodiment of the present invention. It is a block diagram at the time of the external air introduction of the air conditioning apparatus for vehicles of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A-1D Vehicle air conditioner 2 Air supply path 3 Outside air introduction port 4 Inside air introduction port 5,23 Intake door 6 Blower 7 Evaporator (heat source for air conditioning)
8 Heater core (heat source for air conditioning)
10a Defroster outlet (air outlet)
10b Vent outlet (air outlet)
10c Foot outlet (air outlet)
20 Inside air duct 21 Inside air suction inlet 22 Inside air suction outlet S Indoor temperature sensor (indoor temperature detection means)
30 Instrument panel

Claims (3)

An air passage (2) having an outside air introduction port (3) for introducing outside air and an inside air introduction port (4) for introducing the inside air, which is air in the passenger compartment, and the air passage (2) are arranged to suck air. A fan (6), heat sources (7), (8) for air conditioning that are arranged in the air passage (2) and that use the air sucked by the fan (6) as desired conditioned air, and the heat source for air conditioning ( 7) and (8) are vehicle air conditioners (1A) to (1D) provided with air outlets (10a), (10b), and (10c) for supplying the conditioned air whose temperature is adjusted in the vehicle interior. And
The inside air suction inlet (21) at one end is opened on the outer surface of the instrument panel (30), and the inside air suction outlet (22) at the other end is opened upstream of the blower (6) in the air passage (2). It has an inside air duct (20) and an indoor temperature detecting means (S) for detecting the temperature of the inside air sucked into the inside air duct (20), and the inside air suction outlet (22) of the inside air duct (20) is provided. A vehicle air conditioner (1A) to (1D), wherein the vehicle air conditioner (1A) to (1D) is opened at a position where a negative pressure is generated with respect to the outside air introduction port (3). The vehicle air conditioner (1B) according to claim 1,
The inside air suction outlet (22) is opened at a position closer to the blower (6) than the outside air introduction port (3) and in the same direction as the outside air introduction port (3). Vehicle air conditioner (1B). A vehicle air conditioner (1C) according to claim 1,
It has an intake door (23) that can selectively open and close the outside air introduction port (3) and the inside air introduction port (4), and the intake door (23) is in a closed position of the inside air introduction port (4), A vehicle air conditioner (1C) configured to prevent wind pressure caused by outside air from the outside air introduction port (3) from acting on the inside air suction port (22).

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