diff --git a/projects/IoTDameon/UpdateIoTNodeService.cs b/projects/IoTDameon/UpdateIoTNodeService.cs
index f3513da7..5298a64c 100644
--- a/projects/IoTDameon/UpdateIoTNodeService.cs
+++ b/projects/IoTDameon/UpdateIoTNodeService.cs
@@ -1,6 +1,5 @@
 using CookComputing.XmlRpc;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using System;
@@ -20,16 +19,14 @@ namespace IoTDameon
     {
         private readonly ILogger<UpdateIoTNodeService> _logger;
         private readonly IWebHostEnvironment _env;
-        private readonly IConfiguration _cfg;
         private readonly IHttpClientFactory _httpClientFactory;
 
         public bool IsUpdating { get; set; }
 
-        public UpdateIoTNodeService(ILogger<UpdateIoTNodeService> logger, IWebHostEnvironment env, IConfiguration cfg, IHttpClientFactory httpClientFactory)
+        public UpdateIoTNodeService(ILogger<UpdateIoTNodeService> logger, IWebHostEnvironment env, IHttpClientFactory httpClientFactory)
         {
             this._logger = logger;
             this._env = env;
-            this._cfg = cfg;
             this._httpClientFactory = httpClientFactory;
         }
 
@@ -40,7 +37,7 @@ namespace IoTDameon
             while (!stoppingToken.IsCancellationRequested)
             {
                 this.Update();
-                await Task.Delay(1000 * 60, stoppingToken);
+                await Task.Delay(60 * 10 * 1000, stoppingToken);
             }
             await Task.CompletedTask;
         }
@@ -77,7 +74,6 @@ namespace IoTDameon
             var name = $"{appFolder}.zip";
             var backupPath = Path.Combine(root, $"{appFolder}_bk");
             var file = Path.Combine(root, name);
-            var currentCheckSum = string.Empty;
             //检查是否有更新
             this._logger.LogInformation("check last version");
             var currentVersion = this._httpClientFactory.CreateClient().GetAsync($"http://localhost:{port}/Home/GetVersion").Result.Content.ReadAsStringAsync().Result;
@@ -95,7 +91,7 @@ namespace IoTDameon
                 //查看是否已下载更新并删除旧的更新文件
                 if (File.Exists(file))
                 {
-                    currentCheckSum = getCheckSum(file);
+                    var currentCheckSum = GetCheckSum(file);
                     if (currentCheckSum != lastCheckSum)
                     {
                         this._logger.LogWarning($"current file hash {currentCheckSum} does not equals last file hash {lastCheckSum}");
@@ -111,7 +107,7 @@ namespace IoTDameon
                     {
                         fs.Write(bytes);
                     }
-                    currentCheckSum = getCheckSum(file);
+                    var currentCheckSum = GetCheckSum(file);
                     if (currentCheckSum != lastCheckSum)
                     {
                         this._logger.LogWarning($"download file hash {currentCheckSum} does not math hash in xml {lastCheckSum}");
@@ -196,7 +192,7 @@ namespace IoTDameon
             }
         }
 
-        private string getCheckSum(string file)
+        private string GetCheckSum(string file)
         {
             using (var sha = SHA512.Create())
             {