In-vehicle absorption heat pump device

1. An in-vehicle absorption heat pump device comprising:

a regenerator including a gas-liquid separation unit that separates a diluted absorbent containing a refrigerant into the refrigerant and a concentrated absorbent separated from the diluted absorbent, and a heater that heats the diluted absorbent;

a condenser that condenses a refrigerant vapor separated from the diluted absorbent in the gas-liquid separation unit;

an evaporator that evaporates the refrigerant condensed in the condenser;

an absorber that causes the refrigerant evaporated by the evaporator to be absorbed into the concentrated absorbent separated from the diluted absorbent in the gas-liquid separation unit;

a first flow passage through which the concentrated absorbent separated in the gas-liquid separation unit flows to the absorber;

a second flow passage branching from the first flow passage, and through which the concentrated absorbent separated in the gas-liquid separation unit flows to the heater;

a pump disposed on an upstream side of a branch portion to the second flow passage in the first flow passage, and circulating the concentrated absorbent inside the regenerator; and

a storage tank that stores both the diluted absorbent discharged from the absorber and the refrigerant discharged from the evaporator, wherein

the storage tank is integrally provided below both the absorber and the evaporator, and communicates with both the absorber and the evaporator.

2. The in-vehicle absorption heat pump device according to claim 1 , further comprising:

a single absorption evaporator container in which the absorber and the evaporator are internally disposed, wherein

the storage tank is integrally provided on a lower surface of the absorption evaporator container.

3. The in-vehicle absorption heat pump device according to claim 2 , wherein

the absorption evaporator container and the condenser face each other in a horizontal direction.

4. The in-vehicle absorption heat pump device according to claim 1 , further comprising:

a cooling water circuit through which cooling water flows, wherein

the condenser includes

a heat exchanger in which heat exchange is performed between the refrigerant vapor separated in the gas-liquid separation unit and the cooling water flowing through the cooling water circuit, and

a vapor permeable membrane covering the heat exchanger, through which the refrigerant vapor is allowed to pass, and through which the absorbent is prevented from passing.

5. The in-vehicle absorption heat pump device according to claim 1 , wherein

the gas-liquid separation unit includes a storage unit that stores the separated concentrated absorbent, and

the pump is disposed on a downstream side of the storage unit, and is integrally provided on a lower surface of the gas-liquid separation unit.

6. The in-vehicle absorption heat pump device according to claim 1 , further comprising:

a third flow passage through which the diluted absorbent absorbing the refrigerant in the absorber flows to the second flow passage, wherein

the second flow passage has, in a merging portion with the third flow passage, a reduced portion having a flow passage cross-sectional area smaller than that of other portions, and to which a downstream end portion of the third flow passage is connected, and

the reduced portion is configured so that the diluted absorbent of the third flow passage is drawn into the second flow passage due to a negative pressure generated by the concentrated absorbent flowing through the reduced portion.