{"id":156,"date":"2026-07-13T16:16:10","date_gmt":"2026-07-13T08:16:10","guid":{"rendered":"https:\/\/themebb.com\/en\/archives\/156"},"modified":"2026-07-13T16:16:10","modified_gmt":"2026-07-13T08:16:10","slug":"why-does-the-refrigerator-run-for-a-few-minutes-before-turning-on-the-air-compressor","status":"publish","type":"post","link":"https:\/\/themebb.com\/en\/archives\/156","title":{"rendered":"Why Does the Refrigerator Run for a Few Minutes before Turning on the Air Compressor?"},"content":{"rendered":"<p>In the industrial compressed air system, the standard start-stop sequence is very important. Among them,<strong>start freezing dryer and run for 3-5 minutes before turning on the air compressor<\/strong>, this operation is called<strong>precooling operation<\/strong>, is the key link to ensure system stability and air supply quality.<\/p>\n<h2>I. Principle of precooling operation<\/h2>\n<p>freezing dryer stable low temperature conditions need to be established in advance (usually the evaporator temperature drops to 2- 4\u2103) to fully cool the internal heat exchanger, refrigerant pipeline and drainage system. If the air compressor delivers high temperature and high humidity compressed air immediately after starting with load, it will cause frost on the evaporator surface of the dryer, condensate water cannot be discharged in time, and even cause ice blockage or automatic safety stop.<\/p>\n<h2>II. Necessity of linkage control<\/h2>\n<p>modern compressed air systems are widely used<strong>freezing dryer linkage control with air compressor<\/strong>: the start signal of the dryer triggers the delay relay to ensure that the air compressor starts after it enters the steady state. This mechanism belongs<strong>specification for start-stop of compressed air systems<\/strong>the core requirements have been widely adopted by GB\/T 13277.1-2019 compressed air Part 1: Pollutant purification level and SOP of enterprise equipment.<\/p>\n<h2>III. Ignore the risk of precooling<\/h2>\n<ul>\n<li>drying efficiency drops sharply and dew point exceeds the standard (&gt; 3\u2103), affecting precision pneumatic components and spraying process;<\/li>\n<li>condensate water accumulates in the aftercooler or gas end, inducing equipment corrosion or instrument malfunction;<\/li>\n<li>frequent start and stop aggravate the load impact of compressor and dryer compressor and shorten the service life.<\/li>\n<\/ul>\n<p>Therefore<strong>air compressor start process<\/strong>and<strong>industrial gas treatment<\/strong>collaborative management of each link is the basic guarantee to realize efficient, clean and reliable gas supply.<\/p>\n<figure>\n<p>Compressed air system start-stop timing diagram<\/p>\n<p>Freezer start<\/p>\n<p>Pre-cooling operation for 3-5min<\/p>\n<p>Air compressor start<figcaption>Standard Time series for starting air compressor after the freezer pre-cooling is completed<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>It is the key pre-cooling operation of the compressed air system to run freezing dryer 3-5 minutes before turning on the air compressor. This can avoid evaporator Frost, condensate blockage and equipment overload, ensure the dew point is stable and up to standard, and meet the requirements of industrial gas treatment specifications and air compressor start-up process.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","zob_sync_key":"zsync_7d1f6d1e811beac7fedcbab3","zob_sync_source_post_type":"post","zob_sync_lang":"en-US","zob_sync_source_url":"https:\/\/themebb.com\/blog\/archives\/225.html","zob_sync_key_version":"v1","zob_sync_source_blog_id":"1","zob_sync_source_post_id":"225"},"categories":[23],"tags":[],"class_list":["post-156","post","type-post","status-publish","format-standard","hentry","category-haha"],"_links":{"self":[{"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/posts\/156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/comments?post=156"}],"version-history":[{"count":0,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/posts\/156\/revisions"}],"wp:attachment":[{"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/media?parent=156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/categories?post=156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/themebb.com\/en\/wp-json\/wp\/v2\/tags?post=156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}