Patent ID: 7943101

Claim:
A structure of a reducing agent container which stores a liquid reducing agent used in an exhaust gas purification apparatus for reducing and purifying nitrogen oxide in an exhaust gas, wherein a canopy is removably secured to a container body of the reducing agent container to block off an opening arranged in an upper face of the container body, the canopy being respectively fitted with: a base of a water level indicator for detecting a remaining amount of liquid reducing agent; a base of a densitometer for detecting a density of a liquid reducing agent; and a heat exchanger which surrounds detection portions suspended from the bases of the water level indicator and the densitometer, and through which is circulated a heating medium of which a heat source essentially consisting of an engine as, to perform heat exchange with the liquid reducing agent, and wherein the canopy is respectively formed with: a supply port and a return port for the liquid reducing agent so that the water level indicator, the densitometer, the heat exchanger, and the supply port and the return port for the liquid reducing agent are formed integrally with the canopy, and wherein the heat exchanger is arranged so that the canopy is oriented within a horizontal range that overlaps the heat exchanger so that the heat exchanger is arranged in a horizontal range that is overlapped by the canopy.