An air-conditioner that conditions air inside a passenger compartment of a vehicle using a heat pump refrigerating cycle includes: a case having at least a first air passage and a second air passage independent from each other; an indoor heat exchanger cooling air; and a heating heat exchanger heati
An air-conditioner that conditions air inside a passenger compartment of a vehicle using a heat pump refrigerating cycle includes: a case having at least a first air passage and a second air passage independent from each other; an indoor heat exchanger cooling air; and a heating heat exchanger heating air. Inside of the heating heat exchanger is divided into a first section corresponding to the first air passage and a second section corresponding to the second air passage. The first section and the second section are located adjacent with each other through a border portion. The heating heat exchanger has a refrigerant passage through which refrigerant flows in parallel with the border portion.
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1. An air-conditioner that conditions air inside of a passenger compartment of a vehicle using a heat pump refrigerating cycle, the air-conditioner comprising: a case having at least a first air passage and a second air passage independent from each other and extending in an air flowing direction, w
1. An air-conditioner that conditions air inside of a passenger compartment of a vehicle using a heat pump refrigerating cycle, the air-conditioner comprising: a case having at least a first air passage and a second air passage independent from each other and extending in an air flowing direction, wherein the case has an air inlet and a plurality of air outlets located opposite from the air inlet, the plurality of air outlets respectively corresponding to a plurality of seats in the vehicle, the plurality of seats having a predetermined seat including at least a driver seat, the plurality of seats having another seat;a blower sending air into the first air passage and the second air passage of the case;an indoor heat exchanger disposed in the case to cool air sent by the blower; anda heating heat exchanger disposed downstream of the indoor heat exchanger in the air flowing direction in the case to heat air passing through the indoor heat exchanger, the indoor heat exchanger and the heating heat exchanger being a part of the heat pump refrigerating cycle, whereinthe first air passage introduces air from the air inlet to one of the air outlets corresponding to the predetermined seat, and the second air passage introduces air from the air inlet to another of the air outlets corresponding to the another seat,each of the first air passage and the second air passage has a warm passage through which warm air heated by the heating heat exchanger passes and a cool passage through which cool air passes the indoor heat exchanger and bypasses the heating heat exchanger,the air-conditioner further comprising: a first air mix door controlling a ratio between the warm air and the cool air in the first air passage and a second air mix door controlling a ratio between the warm air and the cool air in the second air passage, the amount of the warm air being increased by increasing an open degree of each of the first air mix door and the second air mix door;a temperature setting portion through which a first temperature of conditioned air to be blown from the first air passage and a second temperature of conditioned air to be blown from the second air passage are set; anda controller controlling the amount of the warm air by controlling the open degree of each of the first air mix door and the second air mix door,inside space of the heating heat exchanger is divided into a first section corresponding to the first air passage and a second section corresponding to the second air passage when the case is seen in the air flowing direction,the heating heat exchanger has a refrigerant passage through which refrigerant flows in parallel and a border portion through which the first section and the second section are located adjacent to each other, wherein a refrigerant flow rate is controlled such that a pressure loss across the first section and the second section is equalized, andthe controller controls the open degree of the first air mix door to be larger than the open degree of the second air mix door when the temperature setting portion sets the first temperature to be higher than the second temperature, while the heating pump refrigerating cycle is conducting a heating operation, whereinthe controller compares the first temperature and the second temperature,the controller controls the open degree of the first air mix door to be the maximum and controls the open degree of the second air mix door to be the maximum when the controller determines that the first temperature is equal to the second temperature,the controller controls the open degree of the first air mix door to be the maximum when the controller determines that the first temperature is higher than the second temperature, andthe controller controls the open degree of the second air mix door to be the maximum when the controller determines that the first temperature is lower than the second temperature, andwherein the heating heat exchanger conditions air using only the heat pump refrigerating cycle without using coolant of an internal combustion engine of the vehicle. 2. The air-conditioner according to claim 1, wherein the controller controls the open degree of the first air mix door to have the maximum air amount when the temperature setting portion sets the first temperature to the highest possible temperature setting, while the heating pump refrigerating cycle is conducting a heating operation. 3. The air-conditioner according to claim 2, further comprising: a temperature detector detecting a temperature of air downstream of the heating heat exchanger in each of the first air passage and the second air passage, whereinthe controller controls the open degree of the second air mix door based on the temperature of air detected by the temperature detector in a manner that the conditioned air to be blown from the second air passage has the second temperature. 4. The air-conditioner according to claim 2, further comprising: a pressure detector detecting a pressure of refrigerant in the heating heat exchanger, whereinthe controller controls the open degree of the second air mix door based on the pressure of refrigerant detected by the pressure detector in a manner that the conditioned air to be blown from the second air passage has the second temperature. 5. The air-conditioner according to claim 1, wherein the refrigerant flow rate has a fixed ratio between the first section and the second section. 6. The air-conditioner according to claim 1, wherein the refrigerant flow rate is capable of being reduced in the second section to have the same pressure loss as the first section. 7. The air-conditioner according to claim 1, wherein the heating heat exchanger further includes a core portion, an inflow tank and an outflow tank; the core portion is constructed by layering a plurality of inner tubes and a plurality of fins, a first end of each of the plurality of inner tubes is connected to the inflow tank and a second end of each of the plurality of inner tubes is connected to the outflow tank such that refrigerant stored in the inflow tank flows into each of the plurality of inner tubes, and flows from the inflow tank to the outflow tank. 8. The air-conditioner according to claim 1, wherein the first section corresponds to the first air passage provided to condition air in a driver space of the vehicle, and the second section corresponds to the second air passage provided to condition air in a passenger space of the vehicle. 9. The air-conditioner according to claim 8, wherein the first temperature is a target temperature of conditioned air to be blown for the driver space, and the second temperature is a target temperature of conditioned air to be blown for the passenger space. 10. The air-conditioner according to claim 1, wherein the controller compares the first temperature and the second temperature when the heating pump refrigerating cycle is conducting the heating operation. 11. The air-conditioner according to claim 1, wherein when the controller determines that the first temperature is higher than the second temperature, the controller fixes the open degree of the first air mix door to be the maximum, and controls the open degree of the second air mix door based on the second temperature, andwhen the controller determines that the first temperature is lower than the second temperature, the controller fixes the open degree of the second air mix door to be the maximum, and controls the open degree of the first air mix door based on the first temperature. 12. The air-conditioner according to claim 1, wherein the first air mix door and the second air mix door are controlled independently from each other. 13. The air-conditioner according to claim 1, wherein the controller fixes the open degree of at least one of the first air mix door and the second air mix door to be the maximum.
Kakehashi Nobuharu,JPX ; Ogawa Yoshiyuki,JPX ; Samukawa Katsuhiko,JPX, Vehicle-air-conditioning system with cooling degree estimator for left/right temperature control.
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