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CN-122008817-A - Air conditioning system for vehicle and control method thereof

CN122008817ACN 122008817 ACN122008817 ACN 122008817ACN-122008817-A

Abstract

The invention provides an air conditioning system for a vehicle. The air conditioning system for a vehicle is provided with a flow path through which air in and/or outside the vehicle can circulate, a humidity control device that is disposed in the flow path and that is capable of executing an adsorption mode in which moisture is adsorbed and a regeneration mode in which moisture is released, an HVAC unit that is capable of executing a heating mode in which air is heated, the HVAC unit having a foot opening for blowing the heated air to the foot of an occupant in the vehicle, a defrosting opening for blowing the heated air to a window glass in the vehicle, a foot door for adjusting the amount of air blown out from the foot opening, and a defrost door for adjusting the amount of air blown out from the defrosting opening, and a control unit that is capable of controlling the humidity control device and the HVAC unit. The control unit controls the defrosting door and the foot door so that the amount of air blown out from the defrosting opening is larger than the amount of air blown out from the foot opening when the heating mode of the HVAC unit and the adsorption mode of the humidity control device are executed.

Inventors

  • History is worshipped in field, shore

Assignees

  • 日本碍子株式会社

Dates

Publication Date
20260512
Application Date
20251021
Priority Date
20241111

Claims (14)

  1. 1. An air conditioning system for a vehicle, comprising: a flow path through which air in the vehicle interior and/or the vehicle exterior can circulate; A humidity control device which is disposed in the flow path and is capable of executing an adsorption mode in which moisture is adsorbed and a regeneration mode in which the moisture is released; An HVAC unit capable of performing a heating mode in which the air is heated, the HVAC unit having a foot opening for blowing the heated air toward a foot portion of an occupant in the vehicle, a defrost opening for blowing the heated air toward a window glass in the vehicle, a foot door for adjusting an amount of the air blown out of the foot opening, and a defrost door for adjusting an amount of the air blown out of the defrost opening, and A control unit capable of controlling the humidity control apparatus and the HVAC unit, The control unit controls the defrost door and the foot door so that the amount of air blown out from the defrost opening is larger than the amount of air blown out from the foot opening when the heating mode of the HVAC unit and the adsorption mode of the humidity control device are executed.
  2. 2. The air conditioning system for a vehicle according to claim 1, wherein, The control unit controls the foot door and the defrost door so that the air is blown out from both the defrost opening and the foot opening when the heating mode of the HVAC unit and the adsorption mode of the humidity control apparatus are executed.
  3. 3. The air conditioning system for a vehicle according to claim 1 or 2, wherein, The ratio of the amount of the air blown out from the defrosting opening to the total amount of the air blown into the vehicle is 55% or more.
  4. 4. The air conditioning system for a vehicle according to claim 1 or 2, wherein, The HVAC unit further includes a face opening portion for blowing the heated air toward the vicinity of the face of the occupant in the vehicle and a face door for adjusting the amount of the air blown out from the face opening portion, The control unit controls the defrost door and the face door so that the amount of air blown out from the defrost opening is larger than the amount of air blown out from the face opening when the heating mode of the HVAC unit and the adsorption mode of the humidity control device are executed.
  5. 5. The air conditioning system for a vehicle according to claim 1 or 2, wherein, The humidity conditioning apparatus is disposed within the HVAC unit.
  6. 6. The air conditioning system for a vehicle according to claim 1 or 2, wherein, The humidity conditioning apparatus is disposed on an upstream side of the HVAC unit.
  7. 7. The air conditioning system for a vehicle according to claim 1 or 2, wherein, The flow path is branched at the downstream side of the humidity control apparatus into a first flow path for flowing the air into the vehicle and a second flow path for flowing the air out of the vehicle, The vehicle air conditioning system further includes a first valve that can switch the flow of the air between the first flow path and the second flow path.
  8. 8. The air conditioning system for a vehicle according to claim 1 or 2, wherein, The humidity control apparatus includes an adsorption unit containing an adsorbent capable of adsorbing moisture at a predetermined temperature or lower and releasing the adsorbed moisture when the temperature exceeds the predetermined temperature, and a heating mechanism or heating structure capable of heating the adsorption unit.
  9. 9. The air conditioning system for a vehicle according to claim 8, wherein, The humidity control apparatus includes: A honeycomb structure having an outer peripheral wall and partition walls disposed inside the outer peripheral wall and dividing into a plurality of cells extending from a first end surface to a second end surface to form flow paths for the air; an adsorption layer provided on the surface of the partition wall and containing the adsorbent, and And a pair of electrodes provided on the first end face and the second end face of the honeycomb structure or the outer peripheral wall of the honeycomb structure parallel to the direction in which the cells extend.
  10. 10. The air conditioning system for a vehicle according to claim 9, wherein, At least the partition walls of the honeycomb structure are made of a material having PTC characteristics.
  11. 11. A control method of a vehicle air conditioning system includes: a flow path through which air in the vehicle interior and/or the vehicle exterior can circulate; A humidity control device which is disposed in the flow path and is capable of executing an adsorption mode in which moisture is adsorbed and a regeneration mode in which the moisture is released; An HVAC unit capable of performing a heating mode in which the air is heated, the HVAC unit having a foot opening for blowing the heated air toward a foot portion of an occupant in the vehicle, a defrost opening for blowing the heated air toward a window glass in the vehicle, a foot door for adjusting an amount of the air blown out of the foot opening, and a defrost door for adjusting an amount of the air blown out of the defrost opening, and A control unit capable of controlling the humidity control apparatus and the HVAC unit, In the air conditioning system for a vehicle of the present invention, When the heating mode of the HVAC unit and the adsorption mode of the humidity control apparatus are executed, the control unit controls the defrost door and the foot door so that the amount of air blown out from the defrost opening is larger than the amount of air blown out from the foot opening.
  12. 12. The control method of an air conditioning system for a vehicle according to claim 11, wherein, When the heating mode of the HVAC unit and the adsorption mode of the humidity control apparatus are executed, the foot door and the defrost door are controlled by the control portion so that the air is blown out from both the defrost opening portion and the foot opening portion.
  13. 13. The control method of an air conditioning system for a vehicle according to claim 11 or 12, wherein, The ratio of the amount of the air blown out from the defrosting opening to the total amount of the air blown into the vehicle is 55% or more.
  14. 14. The control method of an air conditioning system for a vehicle according to claim 11 or 12, wherein, The HVAC unit further includes a face opening portion for blowing the heated air toward the vicinity of the face of the occupant in the vehicle and a face door for adjusting the amount of the air blown out from the face opening portion, When the heating mode of the HVAC unit and the adsorption mode of the humidity control apparatus are executed, the control unit controls the defrost door and the face door so that the amount of air blown out from the defrost opening is larger than the amount of air blown out from the face opening.

Description

Air conditioning system for vehicle and control method thereof Technical Field The present invention relates to a vehicle air conditioning system and a control method thereof. Background In various vehicles such as automobiles, there is an increasing demand for improving the cabin environment. Specific demands include reduction of CO 2 in a vehicle to suppress driver's trouble, conditioning of the vehicle, and removal of harmful volatile components such as odor components and allergy-inducing components in the vehicle. As an effective countermeasure against such a demand, ventilation is given, but ventilation is a factor that causes a large amount of heater energy to be lost in winter, resulting in a reduction in energy efficiency in winter. In particular, electric vehicles (BEV: battery ELECTRIC VEHICLE) have a problem in that the cruising distance is greatly reduced due to energy loss. As a method for solving the above-mentioned problems, there is proposed a cabin purifying system (vehicle air conditioning system) comprising a heater member (humidity control equipment), an inflow pipe for connecting a cabin to an inlet end face of the heater member, and an outflow pipe having a first path (first flow path) for connecting an outlet end face of the heater member to the cabin, the heater member comprising a honeycomb structure having an outer peripheral wall and a partition wall disposed inside the outer peripheral wall and forming a plurality of cells forming a flow path extending from one end face to the other end face, at least the partition wall being made of a material having PTC characteristics, a pair of electrodes made of a first electrode provided on one end face and a second electrode provided on the other end face, and a functional material layer provided on a surface of the partition wall, the outflow pipe having a first path for connecting the outlet end face of the heater member to the cabin and a second path (second flow path) for connecting the outlet end face of the heater member to the outside of the vehicle, and provided with a valve for switching the flow of air between the first path and the second path (for example, patent document 1). On the other hand, as an air conditioning system capable of performing cooling and Heating of a vehicle, an air conditioning system provided with HVAC (Heating, ventilation, and air conditioning) means using a heat pump cycle has been proposed (for example, patent documents 2 and 3). Prior art literature Patent literature Patent document 1 International publication No. 2023/074202 Patent document 2 Japanese patent No. 6746742 Patent document 3 Japanese patent laid-open publication 2016-097817 Disclosure of Invention In a vehicle air conditioning system including a humidity control apparatus and an HVAC unit, when a heating mode of the HVAC unit is executed, there is a case where humidity in a vehicle increases due to an influence of an increase in the number of passengers, rain, or snow carried in from outside the vehicle, or the like. If the adsorption mode of the humidity control apparatus is executed in such a situation, there is a problem that the window glass in the vehicle is liable to be fogged when air is supplied from the foot opening portion of the HVAC unit into the vehicle. The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle air conditioning system and a control method thereof that can effectively suppress fogging of a window glass in a vehicle when a heating mode of an HVAC unit and an adsorption mode of a humidity control device are executed. The present inventors have made intensive studies on a vehicle air conditioning system including a humidity control device and an HVAC unit, and as a result, have found that the above-described problems can be solved by controlling a defrost door and a foot door so that the amount of air blown out from a defrost opening is larger than the amount of air blown out from a foot opening when a heating mode of the HVAC unit and an adsorption mode of the humidity control device are executed, and have completed the present invention. Namely, the present invention is exemplified as follows. <1> An air conditioning system for a vehicle, comprising: a flow path through which air in the vehicle interior and/or the vehicle exterior can circulate; A humidity control device which is disposed in the flow path and is capable of executing an adsorption mode in which moisture is adsorbed and a regeneration mode in which the moisture is released; An HVAC unit capable of performing a heating mode in which the air is heated, the HVAC unit having a foot opening for blowing the heated air toward a foot portion of an occupant in the vehicle, a defrost opening for blowing the heated air toward a window glass in the vehicle, a foot door for adjusting an amount of the air blown out of the foot opening, and a defrost door for adjusting an amount o