Energy saving device of heating apparatus

Abstract

An energy saving device is mounted on a heating apparatus. The energy saving device includes a base, a cooling plate, an expandable member, and an upper lid. The base has a cooling trough. A hole and a first through hole are formed in an inner wall of the cooling trough. The expandable member has a trough facing and sealing the cooling plate. When the energy saving device is activated, the expandable member will shrink and suck the hot water in the heating apparatus to the trough and the cooling trough will be filled with cold water to cool the hot water in the trough by the cooling plate, preventing the expandable member from aging and chap and enhancing the capacity of the trough to store the hot water.

What is claimed is: 
     
         1 . An energy saving device of a heating apparatus, the energy saving device being mounted on the heating apparatus, the heating apparatus comprising a heating container, the heating container being connected with an inlet pipe and an outlet unit, the energy saving device being connected to the inlet pipe, the energy saving device comprising:
 a base, the base having a passage, the passage having a water inlet and a water outlet at two ends thereof, the base having a cooling trough, a hole and a first through hole formed in an inner wall of the cooling trough, the hole and the first through hole communicating with the passage, respectively;   a cooling plate, the cooling plate sealing the cooling trough of the base, the cooling plate having a second through hole which communicates with the first through hole of the base;   an expandable member made of a soft material, the expandable member having a trough facing and sealing the cooling plate; and   an upper lid having a balance trough facing and sealing the expandable member, the upper lid having an air hole which communicates with the balance trough;   thereby, when the outlet unit of the heating apparatus being opened, cold water in the inlet pipe flowing through the passage of the base quickly, some of the cold water flowing into the cooling trough through the hole, air in the trough of the expandable member being brought out to form a vacuum, the expandable member shrinking toward the cooling plate, when the outlet unit being closed, the expandable member restoring to its original shape and sucking some of hot water in the heating container, the heating container forming negative pressure to prevent the outlet unit from leakage and to achieve an energy saving, the cold water in the cooling trough being adapted to cool the hot water in the trough by the cooling plate, preventing the expandable member from aging and chap and enhancing the service life of the expandable member.   
     
     
         2 . The energy saving device as claimed in  claim 1 , wherein the base comprises a raised ring around the first through hole and the cooling plate comprises a raised block corresponding to the raised ring of the base, the raised block being inserted in the raised ring, the raised block having the second through hole. 
     
     
         3 . The energy saving device as claimed in  claim 1 , wherein the water inlet and the water outlet have a diameter larger than a diameter of the passage. 
     
     
         4 . The energy saving device as claimed in  claim 1 , wherein the base has a neck disposed between the passage and the water inlet, the neck having a diameter smaller than a diameter of the passage. 
     
     
         5 . The energy saving device as claimed in  claim 4 , wherein the base has a penetration hole which communicates with the neck, the penetrating hole being connected with one end of a pipe, another end of the pipe being connected to outside. 
     
     
         6 . The energy saving device as claimed in  claim 5 , wherein the pipe is connected with a check valve. 
     
     
         7 . The energy saving device as claimed in  claim 1 , wherein the base has a positioning groove around an outer edge of the cooling trough and the cooling plate has a positioning flange corresponding to the positioning groove of the base to seal the cooling trough of the base. 
     
     
         8 . The energy saving device as claimed in  claim 1 , wherein the base has a first limit groove around an outer edge of the cooling trough and the expandable member comprises a first limit block around the trough and corresponding to the first limit groove of the base to seal the cooling trough of the base. 
     
     
         9 . The energy saving device as claimed in  claim 1 , wherein the expandable member comprises a second limit block corresponding to the first limit block and opposite to the cooling plate and the upper lid has a second limit groove around the balance trough and corresponding to the second limit block of the expandable member to seal one side of the expandable member opposite to the cooling plate. 
     
     
         10 . The energy saving device as claimed in  claim 1 , wherein the energy saving device comprises a check valve near the water inlet of the base.