Adsorption heat pump

1. An adsorption heat pump comprising:

an evaporator configured to evaporate a refrigerant; and

an adsorbent heat exchanger including an adsorption member configured to adsorb vapor evaporated by the evaporator, and a heat transfer tube in which a heating medium flows,

wherein the adsorbent heat exchanger includes a pressing mechanism configured to press and compress the adsorption member depending on a temperature of the heating medium flowing inside the heat transfer tube, and

wherein the heat transfer tube includes:

an inlet manifold into which a heating medium flows;

an outlet manifold out of which the heating medium flows;

a plurality of branched tubes connected between the inlet manifold and the outlet manifold;

first heat transfer plates each placed perpendicular to the branched tubes and connecting the branched tubes; and

a second heat transfer plate placed parallel to the branched tubes and connecting the first heat transfer plates, and

the pressing mechanism includes:

a thermosensitive member fixed to the second heat transfer plate and designed to change in shape depending on a temperature of the heating medium flowing inside the branched tubes, the temperature being transferred to the thermosensitive member through the first heat transfer plates and the second heat transfer plate; and

a pressing plate pressing the adsorption member, which is sandwiched between the pressing plate and a corresponding one of the branched tubes, toward the corresponding one of the branched tubes due to changing in shape of the thermosensitive member,

when the temperature of the heating medium flowing inside the branched tubes is higher than a predetermined temperature, a pressing force against the pressing plate becomes larger due to changing in shape of the thermosensitive member, and the pressing plate moves toward the corresponding one of the branched tubes.

2. The adsorption heat pump according to claim 1 , wherein the thermosensitive member is a member formed of any one of a bimetal, a shape memory alloy, and a shape memory resin.

3. The adsorption heat pump according to claim 1 , wherein the adsorption member is formed of a plurality of adsorbent sheets superposed on one another.

4. The adsorption heat pump according to claim 3 , wherein the adsorbent sheets include fibrous activated carbon processed into a sheet shape.

5. The adsorption heat pump according to claim 1 , wherein the adsorption member includes at least one of silica gel, zeolite, and activated carbon.

6. The adsorption heat pump according to claim 1 , wherein water or methanol is used as the refrigerant.

7. The adsorption heat pump according to claim 1 , wherein when the temperature of the heating medium flowing inside the branched tubes is equal to or lower than the predetermined temperature, the pressing force against the pressing plate becomes smaller due to changing in shape of the thermosensitive member, and the pressing plate moves away from the corresponding one of the branched tubes.