Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Thermal Systems, Ltd.

Masaharu Nitta

Kenji Ueda

Minoru Matsuo

Makoto Kishi

Seiichi Okuda

Kazuki Wajima

Tatsuru Nagai

A hot-water heat pump that is capable of reducing installation costs and installation space and also reducing the heating time of a hot-water route, and a method of controlling the same are provided. The hot-water heat pump () is provided with a hot-water-heat-pump main unit () that includes a thermal output heat exchanger that absorbs heat from a heat-source route and outputs heat; hot-water route (and) that receive heat outputted from the thermal output heat exchanger; a three-way valve () provided in the outlet-side hot-water route (); and a controller that controls the hot-water-heat-pump main unit () and the three-way valve (), wherein the controller controls the size of openings of the three-way valve () so that a portion of the outlet-side hot-water route () leading out of the thermal output heat exchanger is guided to an upstream side of the thermal output heat exchanger.

Hot-water heat pump and method of controlling the same

A heat source device is provided with a differential pressure sensor that measures the differential pressure between an inlet pressure and an outlet pressure for the chilled water in an evaporator and with a control device. The control device possesses the coefficient of loss for the evaporator and is provided with a chilled-water flow-rate computing portion that calculates a chilled-water flow rate at the evaporator on the basis of the coefficient of loss and the differential pressure output from the differential pressure sensor; a control-command computing portion that generates a control command by using a specification heating-medium flow rate that is set in advance; and a control-command correcting portion that corrects the control command generated by the control-command computing portion.

Heat source device

Growing community of inventors

Tokyo, Japan

Masaharu Nitta