A cold chamber for cryotherapy has a heat-insulated treatment chamber (101) and a sluice chamber (103). In the treatment chamber (101), a temperature of about -150 DEG C is set by means of a heat exchanger (13) operated with liquid nitrogen. A venting device (30 to 35) supplies dry air to the treatment chamber (101). The sluice chamber (103) pre-cooled by means of a heat exchanger (19) permits a comparatively high opening frequency of the door for entering and leaving the treatment chamber (101). IMAGE
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