当模式时长为null时，时间组件异常问题

flossom-ui/src/views/system/instrument/index.vue

@@ -598,6 +598,7 @@
 						value-format="HH:mm:ss"
 						placeholder="请选择护理时长"
             default-value="00:00:00"
+            @change="pickedTimeComponentChange()"
 					>
 					</el-time-picker>
 				</el-form-item>
@@ -1673,7 +1674,7 @@ export default {
 				wecomTagNames: null,
 				sceneIds: null,
 				sceneNames: null,
-				nursingTime: null,
+				nursingTime: '00:00:00',
 				iotVersion: null,
 				iotUpgradeData: null,
 				isScanCode: 0,
@@ -2262,7 +2263,7 @@ export default {
 			})
       // 仪器数据清空
       this.form.model = null
-      this.form.nursingTime = null
+      this.form.nursingTime = '00:00:00'
       this.form.bluetoothConnecting = null
       this.form.bluetoothConnectingTitle = null
       this.form.bluetoothConnectingContent = null
@@ -2763,6 +2764,12 @@ export default {
 			}
 			return true
 		},
+    // 处理时间组件
+    pickedTimeComponentChange() {
+      if(this.form.nursingTime == null) {
+        this.form.nursingTime = '00:00:00'
+      }
+    }
 	},
 }
 </script>