| 摘要 |
PROBLEM TO BE SOLVED: To adjust a cleaning temperature when an operation member advances and cleans foreign substances stuck to the inner surface of a discharge passage of a valve seat member.SOLUTION: An operation member 15 capable of advancing/retreating into/from a discharge passage 8 of a valve seat member 9. A bimetal 14 is connected to the operation member 15. A case 13 is arranged on the same axis as the valve seat member 9. The bimetal 14 is stored in the case 13. A guide hole 13a for slidably guiding the front side of the operation member 15 in the axial direction of the valve seat member 9 is formed on the one-end side of the case 13. An adjustment member 16 capable of advancing/retreating in the axial direction of the case 13 is screwed on the other end side of the case 13. A guide hole 16a for slidably guiding the rear side of the operation member 15 in the axial direction of the valve seat member 9 is formed on the adjustment member 16. A depth wall 16b which when the operation member 15 retreats, abuts on the rear end of the operation member 15 to regulate retreat of the operation member 15 for a predetermined distance or more is formed on the guide hole 16a of the adjustment member 16. The one-end side of the bimetal 14 is attached to the adjustment member 16 and the other end side is attached to the operation member 15. |
