JP2010000846A - Air-conditioning device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioning device for a vehicle capable of preventing excessive cooling to person on board at the time of cooling while securing a heating condition to the person on board at the time of heating, and capable of reducing noise by reducing a blow-out air amount and reducing burning of the person's head. <P>SOLUTION: The air-conditioning device for the vehicle includes a blower unit for selectively sucking ambient air or inside-cabin air; an inside-cabin air-conditioning unit arranged downstream of the blower unit, including an air passage having a cooling means, a heating means, and an adjusting means for adjusting an amount of air passing through the heating means, and including a blow-out mode means for selectively opening and closing a plurality of opening parts through which temperature-adjusted air is blown out into a cabin; and a seat air-conditioning unit connected with the inside-cabin air-conditioning unit and for supplying the temperature-adjusted air of the inside-cabin air-conditioning unit to a seat for person on board. A temperature of air blown out from the seat air-conditioning unit is changed by a predetermined temperature with respect to a temperature of air blown out from the inside-cabin air-conditioning unit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a vehicle air conditioner including a seat air conditioning unit that directly controls the temperature of an occupant's seat as well as the temperature of air blown into a passenger compartment.
About.

  The vehicle air conditioner disclosed in Patent Document 1 includes an air conditioning unit that blows conditioned air into the vehicle interior, a seat air conditioning unit that blows conditioned air to the seat, and an ECU that controls the air conditioning unit. Air conditioning control for controlling the air conditioning unit with the control amount obtained based on the target blowing temperature TAO from the detected values Tr, Tam, Ts and the set value Tset of the thermal load, and the seat for controlling the seat air conditioning unit The seat air-conditioning control has a first air-conditioning control that determines a control amount when the passenger compartment air-conditioning is in a stable state, and a second air-conditioning control that determines the control amount when in a transient state. Thus, when the air conditioning load of the vehicle air conditioning is large and the vehicle air conditioning capability is high, the seat air conditioning device is based on the set temperature of the air conditioning device Summer overcooling caused when operating at atmospheric capacity is obtained so as to prevent the winter over heating.

The vehicle air conditioner disclosed in Patent Document 2 has a large difference between the target blowing temperature and the set temperature in order to prevent overcooling and overheating of the seat air conditioner in a stable state without performing complicated control. The time is calculated and controlled based on an equation set so that the target air temperature is largely reflected in the target air temperature, as compared to when it is small. Further, in this vehicle air conditioner, the seat is air-conditioned by a passage branched from the air outlet of the air conditioner.
JP 2002-144849 A JP 2006-89018 A

  Both of the vehicle air conditioners disclosed in the above-mentioned patent documents are controlled by controlling the air volume of the seat air conditioning unit on the premise that the seat blowing air temperature and the air blowing temperature of the vehicle air conditioning unit are substantially the same. It is designed to eliminate the discomfort of cooling and overheating, and employs a particularly complex and expensive auto control system.

  In addition, as shown in FIG. 6, the applicant of the present invention is that the difference between the air temperature (HVAC air temperature) of the main body unit of the vehicle air conditioner and the air temperature (seat air temperature) blown out of the seat is an occupant feeling. As a result of investigating the state to be given, in the state where there is no difference between the HVAC air temperature and the seat air temperature (the above-mentioned conventional technology), many occupants have determined that they are “uncomfortable” and “uncomfortable”, and range from +5 degrees to +15 degrees As a result, many passengers felt “no discomfort” and “comfortable”.

  From the above, the present invention uses the temperature difference between the main unit of the air conditioner and the seat side to prevent overcooling to the occupant during cooling, while ensuring the heating state of the occupant during heating. An object of the present invention is to provide a vehicle air conditioner capable of reducing the amount of blown air and reducing noise and reducing the burning of the head.

  Accordingly, the present invention provides a blower unit that selectively sucks outside air or vehicle interior air, and a cooling unit, a heating unit, and an adjusting unit that adjusts the amount of air passing through the heating unit, which are arranged downstream of the blower unit. An air conditioning unit comprising: an air-conditioning unit that selectively opens and closes a plurality of openings for blowing temperature-controlled air into the vehicle interior; and is connected to the indoor air-conditioning unit, In a vehicle air conditioner comprising a seat air conditioning unit that supplies temperature-controlled air of the indoor air conditioning unit to an occupant seat, the air conditioning unit blows out the air temperature blown out of the indoor air conditioning unit The temperature of the air is changed by a predetermined temperature.

  The adjusting means is a mix door, and a state in which the air that has passed through the cooling means does not pass through the heating means is a fully closed state (opening degree 0), and all of the air that has passed through the cooling means is the heating means. When the vent mode is set by the blow-out mode means when the state passing through is set to the fully open state (opening degree 1), the indoor air conditioning is performed in the range of 1/8 to 2/3 of the mix door opening degree. When the temperature of the air blown from the seat air conditioning unit is increased by a predetermined temperature relative to the temperature of the air blown from the vent outlet of the unit, and the bi-level mode is set by the blow mode, the mix door is opened. When the air temperature is blown from the vent outlet of the indoor air conditioning unit in the range of 1/3 to 2/3, the seat air conditioning unit When the temperature of the air to be discharged is increased by a predetermined temperature and the foot mode is set by the blowing mode unit, the foot blowing of the indoor air conditioning unit is performed in the range of the mix door opening from 1/3 to 7/8. It is desirable to raise the temperature of the air blown from the seat air conditioning unit by a predetermined temperature relative to the temperature of the air blown from the outlet.

  The seat air conditioning unit is preferably connected to a region between the heating means and the foot outlet.

  According to the present invention, since the temperature (air temperature) of the air blown from the seat air conditioning unit can be set higher than the temperature of the air blown from the indoor air conditioning unit, it is possible to overcool the occupant during cooling. In addition, the heating state of the occupant can be secured during heating, so that the amount of air blown from the indoor air conditioning unit can be reduced to achieve low noise operation, and the temperature from the indoor air conditioning unit can be reduced. Therefore, it is possible to reduce the burning of the head.

  Further, by connecting the seat air conditioning unit to the region between the heating means and the foot outlet, the temperature (air temperature) of the air blown from the seat air conditioning unit can be reduced from the vehicle interior air conditioning unit with a simple structure. It is possible to set the temperature higher than the temperature of the blown air.

  Embodiments of the present invention will be described below with reference to the drawings.

  The vehicle air conditioner 1 according to the present invention is, for example, as shown in FIG. 1, a blower unit 4 that selectively sucks outside air or vehicle interior air, and a downstream side of the blower unit 4. 5. An air flow path 8 having a heater core 6 as a heating means and an air mix door 7 as an adjusting means for adjusting the amount of air passing through the heater core 6 is provided, and the temperature-controlled air is blown into the vehicle interior 10 An indoor air conditioning unit 2 having a plurality of openings, for example, mode doors 14 and 15 for selectively opening and closing a differential air outlet 11, a vent air outlet 12, and a foot air outlet 13, and the indoor air conditioning unit 2 are connected. And a seat air conditioning unit 3 that supplies temperature-controlled air from the indoor air conditioning unit 2 to the occupant seat 20.

    The seat air conditioning unit 3 includes an air duct 31 having an opening 30 on the downstream side of the heater core 6 in the air flow path 8 of the indoor air conditioning unit 2 and upstream of the branch point to the foot outlet 13, and the air duct 31. A seat side duct 32 that is disposed downstream of the passenger seat 20 and has a plurality of air outlets for blowing out temperature-controlled air on the seat, and a blower 33 that adjusts the air volume to the seat side duct 32. And at least.

  In the indoor air conditioning unit 2 of the vehicle air conditioner 1 according to the present invention described above, the air mix door 7 is controlled by a target blowing temperature (wind temperature) calculated by at least the outside air temperature, the vehicle interior temperature, and the set temperature. This air mix door 7 is a full cool (F / C) state where the air that has passed through the evaporator 5 does not pass through the heater core 6 at all (opening degree zero), and the air that has passed through the evaporator 5 is full that passes through the heater core 6. Control is performed up to the hot (F / H) state (opening degree 1).

  In the automatic mode, the blow-out mode is set to a vent (VENT) mode during cooling, a foot (FOOT) mode during heating, or a bi-level (BI / L) mode between them based on the target air temperature. .

  As shown in FIG. 3, in the vent (VENT) mode (mainly cooling), the air mix door 7 is controlled so that the target air temperature (Tvent) of the indoor air conditioning unit 2 is reached. In the range from 1 / 8H (1/8 of full hot) to 2 / 3H (2/3 of full hot), the seat air temperature Ts is + 5 ° C. above the air temperature Tvent. Within a range of ˜ + 15 ° C., the predetermined temperature is set higher. In FIG. 3, the sheet air temperature Ts indicates the characteristic of the air temperature Tvent + 10 ° C. The maximum difference sheet air temperature characteristic of + 15 ° C. is indicated by Tsmax, and the minimum difference sheet air temperature of + 5 ° C. Characteristics are indicated in Tsmin.

  Similarly, as shown in FIG. 4, even in the bi-level (BI / L) mode, the air mix door 7 is controlled so as to achieve the target air temperature (Tvent) of the indoor air conditioning unit. When the control range of the mix door 7 is within a range from 1 / 3H (1/3 of full hot) to 2 / 3H (2/3 of full hot), the seat air temperature Ts is set to be higher than the air temperature Tvent. The temperature is set higher within a range of + 5 ° C. to + 15 ° C. In FIG. 4, the sheet air temperature Ts indicates the characteristic of the air temperature Tvent + 10 ° C., and the maximum difference sheet air temperature characteristic of + 15 ° C. is indicated by Tsmax, and the minimum difference sheet air temperature of + 5 ° C. Characteristics are indicated in Tsmin.

  Further, as shown in FIG. 5, in the foot (FOOT) mode (mainly heating), the air mix door 7 is controlled so as to be the indoor air conditioning unit target air temperature (Tfoot). When the control range of the air mix door 7 is within a range from 1 / 3H (1/3 of full hot) to 7 / 8H (7/8 of full hot), the seat air temperature Ts is determined from the air temperature Tfoot. Is also set to a predetermined high temperature within a range of + 5 ° C. to + 15 ° C. In FIG. 5, the seat air temperature Ts indicates the characteristic of the air temperature Tfoot + 10 ° C. The maximum difference sheet air temperature characteristic of + 15 ° C. is indicated by Tsmax, and the minimum difference sheet air temperature of + 5 ° C. Characteristics are indicated in Tsmin.

  In addition, the air flow path 8 of the indoor air conditioning unit 2 has a cold air region 8 </ b> A mainly containing cold air and a hot air region 8 </ b> B mainly containing hot air that has passed through the heater core 6 on the downstream side of the air mix door 7. Is. In particular, according to the present invention, the opening 30 of the air duct 31 of the seat air conditioning unit 3 is formed on the downstream side of the heater core 6, particularly in the hot air region 8 </ b> B through which the air that has passed through the heater core 6 mainly passes. Thus, the above-described conditions can be easily achieved.

  In the vent mode (VENT) and the bi-level (BI / L) mode, the heated air that has passed through the heater core 6 is mainly sucked into the air duct 31 when it is not in the full cool state. Since the air having a predetermined temperature higher than the air temperature of 2 is supplied to the seat air conditioning unit 3, the above-described problem is achieved.

  Further, when the foot (FOOT) mode is not in the full hot state (F / H), the heated air immediately after passing through the heater core 6 on the downstream side of the heater core 6 is sucked into the air duct 31, so that the seat Since the temperature of the air supplied to the air conditioning unit 3 is higher than the air temperature of the indoor air conditioning unit 2 by a predetermined temperature, the above problem is achieved.

It is a schematic block diagram of the vehicle air conditioner which concerns on this invention. It is a schematic block diagram of the indoor air-conditioning unit which concerns on this invention. It is a characteristic diagram which showed the characteristic at the time of the vent mode of the vehicle air conditioner of this invention. It is a characteristic diagram which showed the characteristic at the time of the bilevel mode of the vehicle air conditioner of this invention. It is a characteristic diagram which showed the characteristic at the time of the foot mode of the vehicle air conditioner of this invention. It is a characteristic line figure showing the relation between the difference between the seat air temperature and the HVAC air temperature and the air conditioning feeling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Indoor air conditioning unit 3 Seat air conditioning unit 4 Blower 5 Evaporator 6 Heater core 7 Air mix door 8 Air flow path 10 Car interior 11 Differential outlet 12 Vent outlet 13 Foot outlet 14,15 Mode door 20 Crew seat 30 Opening 31 Air Duct 32 Seat Duct 33 Blower

Claims (3)

An air flow path comprising: a blower unit that selectively sucks outside air or vehicle interior air; and a cooling unit, a heating unit, and an adjusting unit that adjusts the amount of air passing through the heating unit. And an air conditioning unit that selectively opens and closes a plurality of openings for blowing temperature-controlled air into the vehicle interior, and is connected to the indoor air conditioning unit, and the temperature of the indoor air conditioning unit is In a vehicle air conditioner comprising a seat air conditioning unit that supplies conditioned air to a passenger seat,
A vehicle air conditioner that raises the temperature of air blown from a seat air conditioning unit by a predetermined temperature relative to the temperature of air blown from the indoor air conditioning unit. The adjusting means is a mix door;
A state in which the air that has passed through the cooling means does not pass through the heating means at all is defined as a fully closed state (opening degree 0), and a state in which all the air that has passed through the cooling means passes through the heating means is defined as a fully open state (opening degree 1 )
When the vent mode is set by the blow-out mode means, the seat with respect to the air temperature blown out from the vent blow-out port of the indoor air-conditioning unit when the mix door opening is in the range of 1/8 to 2/3. When the temperature of the air blown out from the air conditioning unit is increased by a predetermined temperature and the bi-level mode is set by the blow-out mode means, the indoor air-conditioning is performed in the range of 1/3 to 2/3 of the mix door opening. When the air temperature blown from the seat air conditioning unit is raised by a predetermined temperature relative to the air temperature blown from the vent outlet of the unit, and the foot mode is set by the blow mode means, the mix door opening In the range of 1/3 to 7/8, the air temperature blown out from the foot air outlet of the indoor air conditioning unit, Air-conditioning system according to claim 1, characterized in that the temperature of the air blown out from over preparative air conditioning unit is a predetermined temperature.   The vehicle air conditioner according to claim 1 or 2, wherein the seat air conditioning unit is connected to a region between the heating means and the foot outlet.