| 摘要 |
The invention relates to a device for preparing hot water provided with a pressure pump with a supply pipe for supplying relatively cold water to the pressure pump and an outlet connected to a heating pipe which is in heat-exchanging contact with a heating body, with an outlet valve in the heating pipe and a coffee holder, connected to the heating pipe, for accommodating a bed of coffee, whereby the heating body comprises a reservoir that is openly connected to the environment, with a heating element and water in the reservoir as a heat-exchange medium. A by-pass pipe ( 54 ) connects the inlet ( 57 ) and outlet ( 35 ) of the pressure pump ( 34 ) to each other, with a pressure-operated valve ( 56 ) in the by-pass pipe.
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