The utility model discloses a boiler, its characterized in that: including furnace body (1), heating tube (2), cold
water pipe (3), its inlet end is connected with the cold water inlet joint (121), hot
water pipe (4), its inlet end is located furnace body (1) inner chamber liquid level below, and its outlet end is connected with the hot water outlet joint (122), steam
pipe (5), its inlet end is located furnace body (1) inner chamber liquid level above, and its outlet end is connected with the steam outlet joint (123), and preheating
water pipe (6) are located furnace body (1) inner chamber liquid level below, and its inlet end is connected with the preheating water inlet joint (124), and its outlet end is connected with the preheating water outlet joint (125). The utility model discloses still a kind of coffee
machine with the boiler of application has. Compared with prior art, the boiler of the utility model is simple structure and low in cost.