diff --git a/Models/RealTimeData.cs b/Models/RealTimeData.cs
index 6558fc9..d1156e5 100644
--- a/Models/RealTimeData.cs
+++ b/Models/RealTimeData.cs
@@ -28,19 +28,36 @@ namespace AciTester.Models
         [ObservableProperty]
         private int acStartupCountdown;           // D50
 
+
+
+
+        // 除霜温度设置 - 最大值 30
         private float _defrostTempSet;
         public float DefrostTempSet
         {
             get => _defrostTempSet;
-            set => SetProperty(ref _defrostTempSet, value);
+            set
+            {
+                if (value > 30) value = 30;
+                if (value < 0) value = 0;
+                SetProperty(ref _defrostTempSet, value);
+            }
         }
 
+        // 除霜时间设置 - 最大值 180 (秒)
         private int _defrostTimeSet;
         public int DefrostTimeSet
         {
             get => _defrostTimeSet;
-            set => SetProperty(ref _defrostTimeSet, value);
-        }                                           // D302
+            set
+            {
+                if (value > 180) value = 180;
+                if (value < 0) value = 0;
+                SetProperty(ref _defrostTimeSet, value);
+            }
+        }                                        // D302
+
+
 
 
 
diff --git a/Views/MainWindow.xaml b/Views/MainWindow.xaml
index c73a93b..280c33a 100644
--- a/Views/MainWindow.xaml
+++ b/Views/MainWindow.xaml
@@ -185,10 +185,12 @@
                         <StackPanel Orientation="Horizontal" Margin="0,8">
                             <TextBlock Text="除霜温度设置(℃)" Width="130" FontSize="14" VerticalAlignment="Center"/>
                             <TextBox Text="{Binding RealTime.DefrostTempSet, UpdateSourceTrigger=LostFocus, Mode=TwoWay}" Width="100"/>
+                            <TextBlock Text="(≤30)" FontSize="11" Foreground="Gray" Margin="5,0,0,0" VerticalAlignment="Center"/>
                         </StackPanel>
                         <StackPanel Orientation="Horizontal" Margin="0,8">
                             <TextBlock Text="除霜时间设置(秒)" Width="130" FontSize="14" VerticalAlignment="Center"/>
                             <TextBox Text="{Binding RealTime.DefrostTimeSet, UpdateSourceTrigger=LostFocus, Mode=TwoWay}" Width="100"/>
+                            <TextBlock Text="(≤180)" FontSize="11" Foreground="Gray" Margin="5,0,0,0" VerticalAlignment="Center"/>
                         </StackPanel>
                         <StackPanel Orientation="Horizontal" Margin="0,8">
                             <TextBlock Text="除霜计时" Width="130" FontSize="14" VerticalAlignment="Center"/>