Air conditioning system for vehicles

• US 5,681,218 A
• Filed: 07/19/1996
• Issued: 10/28/1997
• Est. Priority Date: 07/21/1995
• Status: Expired due to Fees

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Suzuki, Yoshinobu, Kishi, Noriaki
• Primary Examiner(s): Joyce, Harold
• Application Number:
  US08/683,990
• Time in Patent Office: 466 Days
• Field of Search: 454/75, 454/139, 454/144, 454/158, 55/274, 55/312, 55/467
• US Class Current: 454/75
• CPC Class Codes: B60H 3/0085 Smell or pollution preventing arrangements B60H3/0007, B60H3/0071, B60H3/02, B60H3/06 take precedence
• CPC Class Codes: B60H 3/0092 in the interior of the HVAC unit, e.g. by spraying substances inside the unit
• CPC Class Codes: B60H 3/0625 with provisions for by-passing the filter element

Abstract

An air conditioning system for vehicles prevents pressure loss in an air conditioner casing from increasing by air-conditioning a passenger compartment while detouring around an air cleaning unit when the air conditioning situation is in an irregular air conditioning range, and improves passengers'"'"' comfort by cleaning and air-conditioning air by way of the air cleaning unit when the air conditioning situation is in a regular air conditioning range. An air conditioner controller controls inlet switching dampers for switching air flowing routes in the air conditioner casing, thereby selecting an external or an internal air conditioning priority mode in which air directed to the passenger compartment passes through the air conditioning unit but makes a detour around the air cleaning unit when the air conditioning situation is in the irregular air conditioning range, and for selecting an external or an internal air cleaning mode in which air directed to the passenger compartment passes through the air conditioning unit as well as the air cleaning unit when the air conditioning situation is in the regular air conditioning range.

Claims

1. An air conditioning system for vehicle comprising:

air conditioning means for air-conditioning air passing therethrough;

air cleaning means for cleaning air passing therethrough;

an air conditioner casing having a first air flowing route to permit air to flow into a passenger compartment through the air conditioning means and the air cleaning means and a second air flowing route to permit air to flow into the passenger compartment through the air conditioning means while detouring around the air cleaning means;

fan means for generating airflow within the air conditioner casing and directing said airflow into the passenger compartment; and

route switching means for switching from the first air flowing route to the second air flowing route when an air conditioning situation in the passenger compartment is in an irregular air conditioning range.

2. The air conditioning system according to claim 1, wherein the route switching means is for switching the second air flowing route to the first air flowing route when the air conditioning situation in the passenger compartment is in a regular air conditioning range.

3. The air conditioning system according to claim 1, wherein the air cleaning means is disposed at a center of the passenger compartment, and the air conditioner casing includes, around the air cleaning means, an internal air inlet for drawing in internal air in the passenger compartment.

4. The air conditioning system according to claim 1, wherein the air conditioner casing includes an exhaust opening for discharging air having passed through the air cleaning means, and pivotal door means for selectively opening and closing the exhaust opening.

5. The air conditioning system according to claim 1, wherein:

the air cleaning means includes a dust removal filter for removing dust in air flowing within the air conditioner casing; and

said system further comprises regenerating means for regenerating the dust removal filter by vibrating the dust removal filter.

6. The air conditioning system according to claim 1, wherein:

the air cleaning means includes a deodorant filter having deodorant catalyst deodorizing air flowing within the air conditioner casing; and

said system further comprises regenerating means for regenerating the deodorant catalyst by heating the deodorant catalyst.

7. An air delivery system comprising:

an air temperature adjustment unit;

an intake unit having an intake opening and an exit opening;

air cleaning means disposed in said intake unit; and

switching means for selectively forming a first airflow route in said intake unit in which air from said intake opening flows to said exit opening via said air cleaning means and a second airflow route in said intake unit in which air from said intake opening flows to said exit opening without flowing through said air cleaning means,

wherein;

said intake opening is an exterior air intake opening; and

said intake unit includes an internal air inlet and an inlet switching damper for selectively directing air from said air cleaning means, and from an interior of a vehicle via said internal air inlet, to said exit opening.

8. An air delivery system comprising:

an air temperature adjustment unit;

an intake unit having an intake opening and an exit opening;

air cleaning means disposed in said intake unit; and

switching means for selectively forming a first airflow route in said intake unit in which air from said intake opening flows to said exit opening via said air cleaning means and a second airflow route in said intake unit in which air from said intake opening flows to said exit opening without flowing through said air cleaning means,

wherein said intake opening is an exterior air intake opening, and

said intake unit includes an interior air intake cleaning opening and an inlet switching damper for selectively directing air from said exterior air intake opening and from said interior air intake cleaning opening to said exit opening.

9. An air delivery system comprising:

an air temperature adjustment unit;

an intake unit having an intakes and an exit opening;

air cleaning means disposed in said intake unit; and

switching means for selectively forming a first airflow route in said intake unit in which air from said intake opening flows to said exit opening via said air cleaning means and a second airflow route in said intake unit in which air from said intake opening flows to said exit opening without flowing through said air cleaning means;

detecting means for generating signals representative of environmental parameters related to interior air in a passenger compartment of a vehicle; and

control means connected to said detecting means and said switching means for detecting a regular condition and an irregular condition of said interior air based on said signals generated by said control means and for controlling said switching means to form said first air flowing route responsive to detection of a regular condition and to form said second air flowing route responsive to detection of an irregular condition.

10. The system of claim 9, said detecting means comprising:

an interior air temperature detector for detecting a temperature of said interior air;

wherein said control means is for detecting said regular condition when a difference between said interior air temperature and a predetermined target temperature is less than a predetermined value; and

said control means is for detecting said irregular condition when said difference is greater than said predetermined value.

11. A method of controlling air in an air delivery system, said method comprising the steps of:

sensing a condition of interior air in a passenger compartment of a vehicle;

when said interior air is in a regular condition, directing air to an air temperature adjustment device via an air cleaner; and

when said interior air is in an irregular condition, directing air to said air temperature adjustment device without directing said air through said air cleaner.

12. The method of claim 11, said sensing step including a step of sensing a temperature of said interior air.

13. The method of claim 12, said sensing step further including the steps of:

determining the existence of said regular condition when a difference between said interior air temperature and a target air temperature is less than a predetermined value; and

determining the existence of said irregular condition when a difference between said interior air temperature and said target temperature is greater than said predetermined value.

14. The method of claim 11, said step of directing air to said air temperature adjustment device via said cleaning device comprising the steps of:

detecting the existence of an exterior mode and interior mode;

providing air from an exterior of said vehicle passenger compartment to said cleaning device during said exterior mode; and

providing said interior air to said cleaning device during said interior mode.

15. The method of claim 11, said step of directing air to said temperature adjustment device without directing said air thorough said cleaning device comprising the steps of:

detecting the existence of an exterior mode and an interior mode;

providing air from an exterior of said vehicle passenger compartment to said cleaning device during said exterior mode; and

providing said interior air to said cleaning device during said interior mode.