A fluid-type temperature-regulating unit comprising: a heat exchanger configured to impart cold-heat or hot-heat from a refrigerant to a fluid; a first feed port configured to feed the fluid to a first temperature-regulating device; a first feed channel connecting the heat exchanger and the first feed port; a first recovery port configured to recover the fluid from the first temperature-regulating device; a first recovery channel connecting the heat exchanger and the first recovery port; a first pump provided to the first feed channel or the first recovery channel and configured to draw in the fluid from a first intake port and discharge the fluid from a first discharge port; an expansion tank provided to the first feed channel or the first recovery channel; a second feed port configured to feed the fluid to a second temperature-regulating device; a second feed channel connecting the heat-exchanger and the second feed port; a second recovery port configured to recover the fluid from the second temperature-regulating device; a second recovery channel connecting the heat-exchanger and the second recovery port; and a communication tube configured to direct a portion of the fluid flowing through the second feed channel or the second recovery channel to the expansion tank, wherein the expansion tank is provided so as to be in communication with the first intake port, characterized in that: the fluid-type temperature-regulating unit further comprises a second pump provided to the second feed channel or the second recovery channel and configured to draw in the fluid from a second intake port and discharge the fluid from a second discharge port; the communication tube connects a first-intake-port side and a second-intake-port side, the first-intake-port side belonging to a channel which is either one of the first feed channel or the first recovery channel and to which the first pump is provided, the second-intake-port side belonging to another channel which is either one of the second feed channel or the second recovering channel and to which the second pump is provided; and the communication tube is configured to induce greater pressure loss than any of the first feed channel, the first recovery channel, the second feed channel, and the second recovery channel. a heat exchanger configured to impart cold-heat or hot-heat from a refrigerant to a fluid; a first feed port configured to feed the fluid to a first temperature-regulating device; a first feed channel connecting the heat exchanger and the first feed port; a first recovery port configured to recover the fluid from the first temperature-regulating device; a first recovery channel connecting the heat exchanger and the first recovery port; a first pump provided to the first feed channel or the first recovery channel and configured to draw in the fluid from a first intake port and discharge the fluid from a first discharge port; an expansion tank provided to the first feed channel or the first recovery channel; a second feed port configured to feed the fluid to a second temperature-regulating device; a second feed channel connecting the heat-exchanger and the second feed port; a second recovery port configured to recover the fluid from the second temperature-regulating device; a second recovery channel connecting the heat-exchanger and the second recovery port; and a communication tube configured to direct a portion of the fluid flowing through the second feed channel or the second recovery channel to the expansion tank, wherein the expansion tank is provided so as to be in communication with the first intake port, characterized in that: the fluid-type temperature-regulating unit further comprises a second pump provided to the second feed channel or the second recovery channel and configured to draw in the fluid from a second intake port and discharge the fluid from a second discharge port; the communication tube connects a first-intake-port side and a second-intake-port side, the first-intake-port side belonging to a channel which is either one of the first feed channel or the first recovery channel and to which the first pump is provided, the second-intake-port side belonging to another channel which is either one of the second feed channel or the second recovering channel and to which the second pump is provided; and the communication tube is configured to induce greater pressure loss than any of the first feed channel, the first recovery channel, the second feed channel, and the second recovery channel. the fluid-type temperature-regulating unit further comprises a second pump provided to the second feed channel or the second recovery channel and configured to draw in the fluid from a second intake port and discharge the fluid from a second discharge port; the communication tube connects a first-intake-port side and a second-intake-port side, the first-intake-port side belonging to a channel which is either one of the first feed channel or the first recovery channel and to which the first pump is provided, the second-intake-port side belonging to another channel which is either one of the second feed channel or the second recovering channel and to which the second pump is provided; and the communication tube is configured to induce greater pressure loss than any of the first feed channel, the first recovery channel, the second feed channel, and the second recovery channel.