Air conditioning apparatus having electric heating member integrated with heating heat exchanger
First Claim
1. An air conditioning apparatus for a vehicle having a passenger compartment, the air conditioning apparatus comprising:
- a case for forming an air passage through which air is blown toward the passenger compartment;
a heating heat exchanger, disposed in said case, for heating air using a fluid flowing through said heating heat exchanger as a heating source;
a plurality of electric heating members, disposed in said case, for heating air flowing through said air passage;
a control unit for controlling electric power supplied to said electric heating members according to a temperature of the fluid supplied to said heating heat exchanger, in such a manner that the whole electric heating members are turned off when the temperature of the fluid is higher than a first predetermined temperature, and a number of said electric heating members to be turned on is increased as the temperature of the fluid is lowered from the first predetermined temperature.
1 Assignment
0 Petitions
Accused Products
Abstract
An air conditioning apparatus includes a heating heat exchanger for heating air blown toward a passenger compartment using hot water as a heating source. A plurality of electric heating members are formed integrally with the heating heat exchanger, and electric power supplied to the electric heating members is controlled according a temperature of the hot water. Therefore, a number of the electric heating members to be operated is finely controlled according to the temperature of water flowing through the heating heat exchanger. Further, when a water temperature of the heating heat exchanger is lower than a predetermined temperature (e.g., 35° C.), a water valve is closed to interrupt the flow of water to the heating heat exchanger, and a blower is operated. Therefore, a quantity of heat transmitted from the electric heating members to the water in the heating heat exchanger can be greatly decreased.
-
Citations
28 Claims
-
1. An air conditioning apparatus for a vehicle having a passenger compartment, the air conditioning apparatus comprising:
-
a case for forming an air passage through which air is blown toward the passenger compartment; a heating heat exchanger, disposed in said case, for heating air using a fluid flowing through said heating heat exchanger as a heating source; a plurality of electric heating members, disposed in said case, for heating air flowing through said air passage; a control unit for controlling electric power supplied to said electric heating members according to a temperature of the fluid supplied to said heating heat exchanger, in such a manner that the whole electric heating members are turned off when the temperature of the fluid is higher than a first predetermined temperature, and a number of said electric heating members to be turned on is increased as the temperature of the fluid is lowered from the first predetermined temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An air conditioning apparatus for a vehicle having a passenger compartment, the air conditioning apparatus comprising:
-
a case for forming an air passage through which air blown toward the passenger compartment; a heating heat exchanger, disposed in said case, for heating air using a fluid flowing through said heating heat exchanger as a heating source; a plurality of electric heating members, disposed in said case, for heating air flowing through said air passage; heating load calculation means for calculating heating load for the passenger compartment; and a control unit for controlling electric power supplied to said electric heating members according to the heating load calculated by said heating load calculation means, in such a manner that all electric heating members are turned off when the heating load is lower than a predetermined value, and a number of said electric heating members to be turned on is increased as the heating load is increased from the predetermined value. - View Dependent Claims (15, 16, 17, 18, 19)
-
-
20. An air conditioning apparatus for a vehicle having a passenger compartment, the air conditioning apparatus comprising:
-
a case for forming an air passage through which air is blown toward the passenger compartment; a heating heat exchanger having a plurality of tubes through which a fluid flows, said heating heat exchanger being disposed in said case to heat air using the fluid flowing through the tubes as a heating source; an electric heating member integrated with said heating heat exchanger, for heating air flowing through said air passage; and a blower for blowing air toward said heating heat exchanger, wherein the fluid is not supplied to said heating heat exchanger while operating said blower, when a temperature of the fluid is lower than a first predetermined temperature during operating said electric heating member. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
-
-
28. An air conditioning apparatus for a vehicle having a passenger compartment, the air conditioning apparatus comprising:
-
a case for forming an air passage through which air is blown toward the passenger compartment; a heating heat exchanger having a plurality of tubes through which a fluid flows, said heating heat exchanger being disposed in said case to heat air using the fluid flowing through said tubes as a heating source; an electric heating member integrated with said heating heat exchanger, for heating air flowing through said air passage, said electric heating member being operated when the temperature of the fluid is lower than a first temperature; and a blower for blowing air toward said heating heat exchanger, wherein said blower is operated and the amount of the fluid supplied to said heating heat exchanger is reduced, when the temperature of the fluid is lower than a second predetermined temperature lower than said first predetermined temperature during operating said electric heating member.
-
Specification