| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid jet head and a liquid jet apparatus which perform control optimum to a discharged liquid by detecting a temperature close to that of the discharged liquid and thus can improve a discharge characteristic and also which are made small in size.SOLUTION: A head body 20 which jets a liquid, a passage member 30 which is provided with a liquid passage 100 having a supply passage supplying the liquid to the head body and a collecting passage 120 collecting the liquid from the head body, and a circuit board 50 which is held by the passage member and provided with a temperature detecting part detecting the temperature are included. In the passage member 30, a detection area of which the thermal resistance is lower than that of the other area is provided in a part of a partition wall demarcating the liquid passage 100 being either of the supply passage and the collecting passage 120, and the circuit board 50 is fixed to the passage member 30 in a state that the temperature detecting part is opposed to the detection area. The circuit board 50 has a heated part 52 which is heated by the liquid flowing through the liquid passage 100 being the other of the supply passage and the collecting passage 120. |
