Adsorption type refrigerator that automatically determines switchover point

Abstract

The present invention discloses an adsorption type refrigerator that automatically determines the switchover point. The adsorption type refrigerator includes a first vacuum chamber, a second vacuum chamber, a third vacuum chamber and a waterway structure. The waterway structure is connected to a first adsorption bed in the first vacuum chamber and a second adsorption bed in the second vacuum chamber. The waterway structure simultaneously conveys hot water into the first adsorption bed and cold water into the second adsorption bed, or simultaneously conveys cold water into the first adsorption bed and hot water into the second adsorption bed so as to allow the first and the second adsorption beds to conduct adsorption and desorption alternatively. This alternation creates pressure variation in the three vacuum chambers, which is then utilized to automatically determine the switchover point at which the refrigerator can provide and maintain a cold, stable environment.

1 . An adsorption type refrigerator that automatically determines a switchover point, the adsorption type refrigerator comprising:
 a first vacuum chamber having a first adsorption bed, a first condenser, a first evaporator, and a first vacuum gauge, wherein the first adsorption bed has a first inlet and a first outlet, and the first vacuum gauge serves to measure a first vacuum pressure inside the first vacuum chamber;   a second vacuum chamber abreast with the first vacuum chamber and having a second adsorption bed, a second condenser, a second evaporator, and a second vacuum gauge, wherein the second adsorption bed has a second inlet and a second outlet, and the second vacuum gauge serves to measure a second vacuum pressure inside the second vacuum chamber;   a third vacuum chamber having a top connected to bottoms of the first vacuum chamber and the second vacuum chamber, the third vacuum chamber having a third evaporator and a third vacuum gauge, wherein the third evaporator has an ice water inlet and an ice water outlet, and the third vacuum gauge serves to measure a third vacuum pressure inside the third vacuum chamber; and   a waterway structure comprising a plurality of pipes and a plurality of valves, wherein the pipes are mutually connected through the valves, the valves being switchable between a first position for simultaneously conveying hot water into the first adsorption bed and cold water into the second adsorption bed and a second position for simultaneously conveying the cold water into the first adsorption bed and the hot water into the second adsorption bed;   wherein the valves are switched to the first position when the first vacuum pressure reaches a minimum, and the valves are switched to the second position when the second vacuum pressure reaches the minimum.   
     
     
         2 . The adsorption type refrigerator of  claim 1 , wherein the valves include:
 a first valve for guiding the hot water coming from a hot water inlet to the first inlet or the second inlet;   a second valve for communicating the first outlet or the second outlet with a hot water outlet;   a third valve for guiding the cold water coming from a cold water inlet to the first inlet or the second inlet; and   a fourth valve for communicating the first outlet or the second outlet with a cold water outlet.   
     
     
         3 . The adsorption type refrigerator of  claim 1 , wherein the valves include:
 a fifth valve connected to a hot water inlet;   a sixth valve connected to the fifth valve and connected to a hot water outlet;   a seventh valve connected to the fifth valve and connected to the first inlet and the second inlet;   an eighth valve connected to the sixth valve and connected to the first outlet and the second outlet, wherein the eighth valve is further connected to the seventh valve through a bypass pipe;   a ninth valve connected to the seventh valve and connected to the first inlet and the second inlet; and   a tenth valve connected to the cold water outlet and connected to the first outlet and the second outlet;   wherein the seventh valve guides the hot water coming from the hot water inlet to the first adsorption bed or the second adsorption bed, and the ninth valve guides the cold water coming from the cold water inlet into the first adsorption bed or the second adsorption bed.   
     
     
         4 . The adsorption type refrigerator of  claim 1 , wherein the first condenser and the second condenser share a conjoint condenser tube and the condenser tube is configured through the first vacuum chamber and the second vacuum chamber. 
     
     
         5 . The adsorption type refrigerator of  claim 1 , wherein each of the first evaporator and the second evaporator comprises:
 at least one evaporator tray for carrying a heat-transferring medium; and   a heat-transferring pipe provided on each said evaporator tray and having two ends in communication with the third vacuum chamber.   
     
     
         6 . The adsorption type refrigerator of  claim 1 , wherein the third evaporator comprises:
 at least one evaporation heat-exchanging tray for carrying the heat-transferring medium; and   a heat-exchanging pipe having two ends connected to the ice water inlet and the ice water outlet, respectively, the heat-exchanging pipe being provided on each said evaporation heat-exchanging tray.   
     
     
         7 . The adsorption type refrigerator of  claim 1 , further comprising three adjusting pipes, wherein each said adjusting pipe is in communication with the corresponding first vacuum chamber, second vacuum chamber, or third vacuum chamber, for independently supplementing water to or vacuuming the first vacuum chamber, the second vacuum chamber, or the third vacuum chamber.