As is known, one of the electrical load on the refrigeration machine is deforst heater.<\/span> Defrost heater is an electrical component in the refrigeration machine for controlling the amount of a layer of frost on the surface of the evaporator.<\/span> When the layer of frost that accumulates on the surface of the evaporator is not removed it will interfere with the cooling process.<\/span> Therefore, the refrigeration unit either for domestic or commercial purposes has been equipped with automatic defrost system, namely by using the defrost timer.<\/span><\/p>\n

Defrost timer is one of the safety devices installed on the refrigerator unit.<\/span> Figure 2.23 shows a typical defrost timer, which operates electromechanical.<\/span> Figure 2.24 shows a typical defrost timer operating in microelectronics.<\/span> Electronic control device is equipped with a microprocessor that can be programmed as needed.<\/span><\/p>\n

<\/a>
\n Figure 2.23 Typical mechanical Defrost Timer<\/span><\/p>\n

System defrost (defrost) automatically applied to the refrigerator unit using a timer to activate the defrost cycle.<\/span> In the automatic defrost system, added heater (pemenas elements) and the thermostat on the evaporator coil.<\/span> Defrost timer set defrost cycle in the evaporator, typically every 8 hours.<\/span> If during defrost arrived, then the compressor will stop working, and the defrost heater will be active.<\/span> Defrost heater will heat the evaporator so that the frost melts.<\/span><\/p>\n

<\/a>
\n Figure 2.24 Typical electronic timer Defrost<\/span><\/p>\n

Defrost thermostat will monitor the temperature of the evaporator, and when the evaporator temperature reaches a certain point, the defrost heater becomes inactive.<\/span> Defrost thermostat commonly known as the defrost termination thermostat or defrost terminator or thermal defrost switch.<\/span> The target evaporator temperature is typically 40 and 60 0F.<\/span> 2:25 image shows the location of placement defrost termination and construction.<\/span><\/p>\n

<\/a>
\n Typical image Defrost 2:25 terminator<\/span><\/p>\n

Water condensate tray accommodated by a type that is placed on the bottom of the evaporator where the heat from the compressor and condenser flowing through so as to accelerate the process of evaporation.<\/span>
\n Some cycle defrost system implemented based on the time count.<\/span> The amount of time chosen by the interval between defrost.<\/span> If the timer counts the time that have been achieved, then the system will defrost start work, without taking into account the need for cooling in the system.<\/span><\/p>\n

This configuration is commonly referred to as continuous run.<\/span> Type of more effective computation time is a system that takes into account the amount of time the compressor work.<\/span> When the timer detects the accumulation of compressor working time in accordance with the desired timing of the defrost system will work.<\/span> Such systems are commonly referred to as a cumulative run-time defrost.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

As is known, one of the electrical load on the refrigeration machine is deforst heater. Defrost heater is an electrical component in the refrigeration machine for controlling the amount of a layer of frost on the surface of the evaporator. When the layer of frost that accumulates on the surface of the evaporator is not …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1406],"tags":[816,817,822,821,818,820,819,823,825,824],"class_list":["post-695","post","type-post","status-publish","format-standard","hentry","category-english","tag-refrigeration-machine","tag-refrigeration-machine-operator","tag-refrigeration-machine-operator-jobs","tag-refrigeration-machine-operator-jobs-nyc","tag-refrigeration-machine-operator-license","tag-refrigeration-machine-operator-license-preparation","tag-refrigeration-machine-operator-practice-exam","tag-refrigeration-machine-operator-salary-nyc","tag-refrigeration-machine-room-ventilation","tag-refrigeration-machinery-room"],"_links":{"self":[{"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/posts\/695","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/comments?post=695"}],"version-history":[{"count":1,"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/posts\/695\/revisions"}],"predecessor-version":[{"id":3010,"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/posts\/695\/revisions\/3010"}],"wp:attachment":[{"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/media?parent=695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/categories?post=695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tneutron.net\/mesin\/wp-json\/wp\/v2\/tags?post=695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}