Komatsu Corporation

Tsutomu Hatanaka

Norio Takahashi

Toshiyuki Kamei

Shunsuke Miyamoto

Tomohisa Sato

Masashi Osanai

Hironori Akiba

Hiroaki Takechi

Takumi Sugihara

Isao Shibata

A control unit is disclosed for controlling a refrigerating machine in such a way that a refrigerating power exceeding the required performance is secured while the control unit has a function of bypassing hot gas by means of a hot gas bypass line. A temperature-responsive valve is mounted in the hot gas bypass line in addition to a pressure regulating valve. If a preset temperature Tr of a brine becomes equal to or higher than a given temperature (0&deg; C.), the temperature-responsive valve opens the bypass line. If the preset temperature Tr becomes lower than the given temperature, the temperature-responsive valve closes the bypass line.

Control unit for refrigerating machine

A temperature control system which performs control of an object whose temperature is to be controlled as accurately as possible. The system comprises: a chiller located in a fluid circulating and supplying system, for cooling a thermal fluid returning from a vacuum chamber, a first flow control valve located in the fluid circulating and supplying system in a position between the chiller and the vacuum chamber, a bypass passage for splitting and supplying thermal fluid returning from the vacuum chamber to a position between the first flow control valve and the vacuum chamber, before it reaches the chiller, a second flow control valve located in the bypass passage, and a halogen lamp heater located in the fluid circulating and supplying system in a position between a confluence point of the bypass passage and the vacuum chamber, for adjusting the temperature of the thermal fluid passing therethrough to a set temperature.

Temperature control device and temperature control method

Growing community of inventors

Hiratsuka, Japan

Tsutomu Hatanaka