Water tank assembly and gas water heater

Abstract

A water tank assembly and a gas water heater are disclosed. The water tank assembly includes a tank body and a heat exchanger. The tank body includes side plates connected to each other to form a flue gas chamber, in which the heat exchanger is arranged. The heat exchanger includes heat exchange tubes. At least one of the side plates includes a first stamping plate and a second stamping plate connected to the first stamping plate. The first stamping plate forms a first stamping groove, and the second stamping plate forms a second stamping groove. After the first stamping plate is connected to the second stamping plate, the first stamping groove communicates with the second stamping groove to form a first water box, and at least one of the heat exchange tubes is threaded through the first stamping plate to communicate with the first water box.

What is claimed is: 
     
         1 . A water tank assembly applicable to a gas water heater, wherein the water tank assembly comprises a tank body and a heat exchanger, the tank body comprising a plurality of side plates connected to each other to form a flue gas chamber, the heat exchanger being arranged inside the flue gas chamber and comprising a plurality of heat exchange tubes; wherein at least one of the plurality of side plates comprises:
 a first stamping plate; and   a second stamping plate connected to the first stamping plate, the first stamping plate being recessed in a direction away from the second stamping plate to form a first stamping groove, and the second stamping plate being recessed in a direction away from the first stamping plate to form a second stamping groove; wherein   after the first stamping plate is connected to the second stamping plate, the first stamping groove communicates with the second stamping groove to form a first water box, and at least one or more of the plurality of heat exchange tubes are threaded through the first stamping plate to communicate with the first water box.   
     
     
         2 . The water tank assembly as claimed in  claim 1 , wherein the first stamping groove has a first notch facing toward the second stamping plate, and the second stamping groove has a second notch facing toward the first stamping groove; and
 wherein a plate surface of the first stamping plate where the first notch is formed hermetically abuts against a plate surface of the second stamping plate where the second notch is formed.   
     
     
         3 . The water tank assembly as claimed in  claim 2 , wherein viewed along a direction from the second stamping plate toward the first stamping plate, a projection of the second stamping groove is positioned within the first stamping groove; or
 wherein a depth of the second stamping groove is not greater than a depth of the first stamping groove.   
     
     
         4 . The water tank assembly as claimed in  claim 1 , wherein the plurality of side plates comprise a first side plate and a second side plate arranged oppositely, each of the first side plate and the second side plate comprises the first stamping plate and the second stamping plate; and
 wherein each of at least one or more of the plurality of heat exchange tubes has two ends respectively communicating with the first water box of the first side plate and the first water box of the second side plate.   
     
     
         5 . The water tank assembly as claimed in  claim 4 , wherein the tank body further has a flue gas inlet communicating with the flue gas chamber; the first water box of the first side plate comprises a first primary heat exchange water box and a first condensing heat exchange water box, and the first water box of the second side plate comprises a second primary heat exchange water box and a second condensing heat exchange water box; and the plurality of heat exchange tubes comprise:
 a first primary heat exchange tube bundle comprising a plurality of first primary heat exchange tubes, wherein two ends of each of the plurality of first primary heat exchange tubes respectively communicate with the first primary heat exchange water box and the second primary heat exchange water box; and   a condensing heat exchange tube bundle comprising a plurality of condensing heat exchange tubes, wherein two ends of each of the plurality of condensing heat exchange tubes respectively communicate with the first condensing heat exchange water box and the second condensing heat exchange water box;   wherein the condensing heat exchange tube bundle is positioned on a side of the first primary heat exchange tube bundle facing away from the flue gas inlet.   
     
     
         6 . The water tank assembly as claimed in  claim 5 , wherein a plurality of first primary heat exchange water boxes and a plurality of second primary heat exchange water boxes are provided, and one of the plurality of first primary heat exchange tubes correspondingly communicates with one of the plurality of first primary heat exchange water boxes and one of the plurality of second primary heat exchange water boxes, such that the plurality of first primary heat exchange tubes are connected in series to form a series-connected water circuit. 
     
     
         7 . The water tank assembly as claimed in  claim 6 , wherein a plurality of first condensing heat exchange water boxes and a plurality of second condensing heat exchange water boxes are provided; and
 at least two of the plurality of condensing heat exchange tubes correspondingly communicate with one of the plurality of first condensing heat exchange water boxes and one of the plurality of second condensing heat exchange water boxes.   
     
     
         8 . The water tank assembly as claimed in  claim 7 , wherein the first water box of the second side plate further comprises:
 a first cross-layer water box communicating with one of the plurality of first primary heat exchange tubes and one of the plurality of condensing heat exchange tubes.   
     
     
         9 . The water tank assembly as claimed in  claim 5 , further comprising two water box components, which are connected to an outer side of the first side plate and an outer side of the second side plate respectively and each of which is formed with a second water box;
 the first primary heat exchange tube bundle further comprises a plurality of second primary heat exchange tubes positioned on a side of the plurality of first primary heat exchange tubes facing toward the flue gas inlet; wherein   one end of a given one of the plurality of second primary heat exchange tubes is threaded through the first side plate and communicates with the second water box for the first side plate, and other end of the given second primary heat exchange tube is threaded through the second side plate and communicates with the second water box for the second side plate.   
     
     
         10 . The water tank assembly as claimed in  claim 9 , wherein along an arrangement direction of the plurality of first primary heat exchange tubes, the plurality of first primary heat exchange tubes and the plurality of second primary heat exchange tubes are alternately arranged; or
 wherein each of the water box components comprises:   a cover plate connected to the outer side of the first side plate or the second side plate; and   a third stamping plate recessed in a direction away from the cover plate to form a third stamping groove; wherein   the cover plate covers the third stamping plate, and a plate surface of the cover plate facing toward the third stamping plate fits with a groove wall surface of the third stamping groove to form the second water box.   
     
     
         11 . The water tank assembly as claimed in  claim 9 , wherein the second water box of the water box component connected to the first side plate comprises:
 a third primary heat exchange water box communicating with one end of the second primary heat exchange tube; and   a second cross-layer water box, wherein the second cross-layer water box communicates with one end of a given one of the plurality of first primary heat exchange tubes away from the second side plate and communicates with one end of a given one of the plurality of second primary heat exchange tubes away from the second side plate.   
     
     
         12 . The water tank assembly as claimed in  claim 11 , wherein the first water box of the first side plate further comprises at least two fourth primary heat exchange water boxes, and the first water box of the second side plate further comprises a fifth primary heat exchange water box;
 the plurality of heat exchange tubes further comprise a second primary heat exchange tube bundle positioned on a side of the first primary heat exchange tube bundle facing toward the flue gas inlet, and the plurality of heat exchange tubes further comprise a plurality of third primary heat exchange tubes, at least two of the plurality of third primary heat exchange tubes forming a parallel-connected heat exchange tube bundle; and   two parallel-connected heat exchange tube bundles are provided, wherein two ends of one of the two parallel-connected heat exchange tube bundles respectively communicate with one of the at least two fourth primary heat exchange water boxes and the fifth primary heat exchange water box, wherein two ends of the other one of the two parallel-connected heat exchange tube bundles respectively communicate with the other one of the at least two fourth primary heat exchange water boxes and the fifth primary heat exchange water box, wherein the two parallel-connected heat exchange tube bundles being spaced apart along a direction from the first side plate towards the second side plate and being arranged adjacent to the first side plate and the second side plate, respectively.   
     
     
         13 . The water tank assembly as claimed in  claim 12 , wherein the second water box of the water box component connected to the first side plate further comprises a third cross-layer water box; and
 one of the two parallel-connected heat exchange tube bundles is further threaded through the second stamping plate of the first side plate to communicate with the third cross-layer water box, and one end of one of the plurality of second primary heat exchange tubes away from the second side plate communicates with the third cross-layer water box.   
     
     
         14 . The water tank assembly as claimed in  claim 5 , wherein the condensing heat exchange tubes are corrugated tubes. 
     
     
         15 . The water tank assembly as claimed in  claim 5 , wherein the heat exchanger further comprises a heat exchange fin, the heat exchange fin comprises:
 a fin body having a thickness direction; and   collars connected to a side surface of the fin body in the thickness direction, the collars fitting with the fin body to form a plurality of tube pass-through openings, a given one of the plurality of heat exchange tubes being correspondingly threaded through a given one of the plurality of tube pass-through openings; wherein   each of the collars has a solder pass-through opening communicating with the given tube pass-through opening, and the solder pass-through opening is configured to allow solder to flow into a gap between the given tube pass-through opening and the given heat exchange tube.   
     
     
         16 . The water tank assembly as claimed in  claim 15 , wherein a plurality of solder pass-through openings are provided, and the plurality of solder pass-through openings are arranged at intervals along a circumferential direction of each collar. 
     
     
         17 . The water tank assembly as claimed in  claim 15 , wherein a plurality of heat exchange fins are provided, the plurality of heat exchange fins being arranged at intervals along the thickness direction, each of the plurality of heat exchange fins being provided with solder receiving openings communicating with the solder pass-through openings; wherein
 the solder receiving openings of the plurality of heat exchange fins are aligned with each other along the thickness direction, for placing the solder.   
     
     
         18 . The water tank assembly as claimed in  claim 17 , wherein for a same heat exchange fin, one of the solder receiving openings and one of the solder pass-through openings are positioned in a same radial direction of the given tube pass-through opening. 
     
     
         19 . The water tank assembly as claimed in  claim 15 , wherein a plurality of heat exchange fins are provided, the plurality of heat exchange fins being arranged at intervals along the thickness direction, and each of the collars of the plurality of heat exchange fins being provided with a limiting part; and
 wherein, along an arrangement direction of the plurality of heat exchange fins, the limiting parts of any given one of the plurality of heat exchange fins are configured to limit and abut against a heat exchange fin adjacent to the given heat exchange fin;   wherein the limiting part is a limiting flange formed at an edge of the collar away from the fin body along the thickness direction; and   an angle is formed between the limiting flange and the collar, and in a radial direction of the tube pass-through opening, the limiting flange extends in a direction away from the tube pass-through opening.   
     
     
         20 . A gas water heater comprising:
 a housing;   the water tank assembly as claimed in  claim 1 , the water tank assembly being arranged inside the housing; and   a burner arranged inside the housing and configured to generate heat exchange flue gas flowing towards the flue gas chamber.