Inverter compressor in the refrigerator: pros and cons

The com­pres­sor is a very impor­tant part of the refrig­er­a­tor. There are sev­er­al types of these devices and they all dif­fer in tech­ni­cal char­ac­ter­is­tics. The invert­er com­pres­sor was devel­oped rel­a­tive­ly recent­ly and many do not know about its work­ing prin­ci­ple and advan­tages. In this arti­cle we will talk about the prin­ci­ple of oper­a­tion and what is an invert­er com­pres­sor in the refrig­er­a­tor.

The principle of operation of the inverter compressor

When the lin­ear com­pres­sor is run­ning, the max­i­mum start-up of the device is per­formed. When the set cool­ing tem­per­a­ture is reached, an auto­mat­ic switch-off is acti­vat­ed. The relay con­trols the process of shut­ting down and resum­ing the oper­a­tion of the refrig­er­a­tor. There is a click when turn­ing on and off. A char­ac­ter­is­tic buzz indi­cates the oper­a­tion of the engine.

With the con­stant oper­a­tion of the refrig­er­a­tor at full pow­er and fre­quent shut­downs, the device gets very hot and after a cer­tain time fails, after which the replace­ment of the cool­ing device is required. Anoth­er dis­ad­van­tage: high elec­tric­i­ty con­sump­tion due to increased elec­tri­cal load.

When cre­at­ing an invert­er motor, all of the above dis­ad­van­tages were tak­en into account. In gen­er­al, the device works on the same prin­ci­ple, with the excep­tion of a few dif­fer­ences. When the invert­er refrig­er­a­tor cools down to the required tem­per­a­ture, the oper­a­tion does not stop, but there is a grad­ual decrease in speed and a decrease in the refrig­er­ant speed. Thus, a cer­tain tem­per­a­ture lev­el is main­tained.
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When the refrig­er­a­tor door is opened, the num­ber of rev­o­lu­tions of the shaft increas­es accord­ing to the sen­sor sig­nal about the tem­per­a­ture increase and dis­crep­an­cy with the required one. Unlike a lin­ear gen­er­a­tor, the new gen­er­a­tor runs more smooth­ly using min­i­mal pow­er.

If you explain the invert­er oper­a­tion from a tech­ni­cal point of view, the AC is con­vert­ed to DC, fol­lowed by the reverse process, but at the same time the required fre­quen­cy is set. The brush­less three-phase com­pres­sor motor used in the refrig­er­a­tor is used in the pro­duc­tion of auto­mo­bile machin­ery, com­put­er equip­ment, med­ical equip­ment, etc.

Pros and cons of an inverter refrigeration system

The main advan­tage of this type of com­pres­sor is low pow­er con­sump­tion and long-term oper­a­tion. Smooth, quick tem­per­a­ture con­trol and qui­et oper­a­tion are the advan­tages of house­hold appli­ances with this type of engine.

When buy­ing a refrig­er­a­tor with an invert­er motor, a guar­an­tee is issued for a peri­od of about 10 years. This con­firms the reli­a­bil­i­ty of the device and the con­fi­dence of the man­u­fac­tur­er in the qual­i­ty of its prod­uct.

How­ev­er, a lin­ear com­pres­sor refrig­er­a­tor costs less than an invert­er refrig­er­a­tion sys­tem, so it con­tin­ues to be in demand. Along with the high price, the invert­er device has anoth­er dis­ad­van­tage. Mains volt­age fluc­tu­a­tions can lead to a mal­func­tion of the refrig­er­a­tor, since this type of com­pres­sor is more com­plex than a con­ven­tion­al engine. Wiring in the room must be reli­able. Oth­er­wise, the instal­la­tion of sta­bi­liza­tion devices is required.

Regard­less of the short­com­ings, such a device is gain­ing pop­u­lar­i­ty among buy­ers. Grad­u­al­ly, the mar­ket is filled with new, more advanced mod­els. Mod­ern pro­duc­tion is not lim­it­ed to refrig­er­a­tors — the invert­er com­pres­sor is already an inte­gral part of air con­di­tion­ers, wash­ing machines and oth­er house­hold appli­ances.