FREEZER AND ACTUATION DETERMINATION METHOD OF PRESSURE SWITCH

PROBLEM TO BE SOLVED: To reduce the number of connection parts corresponding to a plurality of pressure switches.SOLUTION: A freezer (10) comprises: a plurality of pressure switches (41, 42, and 43), each having switch parts (41a, 42a, and 43a) which are configured so that the set pressure of operating coolant is different from each other and opens the contact by operating; a switch circuit (40) to which the switch parts (41a, 42a, and 43a) of the plurality of pressure switches (41, 42, and 43) are connected in series; and a judgement part (51) when the switch circuit (40) is in a non-energized state, for judging which pressure switch (41, 42, and 43) operates based on at least the physical amount corresponding to the pressure of a refrigerant circuit (11).SELECTED DRAWING: Figure 2 【課題】複数の圧力スイッチに相当する接続部品の数量を削減する。【解決手段】冷凍装置（10）には、作動する冷媒の設定圧力が互いに異なるように構成され、作動することで接点を開くスイッチ部（41a,42a,43a）をそれぞれ有する複数の圧力スイッチ（41,42,43）と、複数の圧力スイッチ（41,42,43）のスイッチ部（41a,42a,43a）が直列に接続されるスイッチ回路（40）と、スイッチ回路（40）が非通電状態になるときに、少なくとも、冷媒回路（11）の圧力に相当する物理量に基づいて、どの圧力スイッチ（41,42,43）が作動したかを判定する判定部（51）とが設けられる。【選択図】図２