What is an invert­er type air con­di­tion­er? In appear­ance, such cli­mat­ic devices are no dif­fer­ent from their own kind. The exter­nal assem­bly is also typ­i­cal for rep­re­sen­ta­tives of such devices. The same can be said about func­tions. But at the same time, an invert­er-type air con­di­tion­er is con­sid­ered a more advanced device with sta­ble oper­a­tion. To under­stand whether this is true or a pub­lic­i­ty stunt, an analy­sis of the capa­bil­i­ties of invert­er tech­nol­o­gy will help.

Inverter air conditioner

Principle of operation

What are the dif­fer­ences between con­ven­tion­al air con­di­tion­ers and our heroes? And what is an invert­er split sys­tem? Which air con­di­tion­er is bet­ter — invert­er or con­ven­tion­al? Is there a risk of over­pay­ing? These and oth­er ques­tions arise in the head of the future own­er of cli­mate tech­nol­o­gy. And you can answer them only by ana­lyz­ing the dif­fer­ences between an invert­er air con­di­tion­er and its con­ven­tion­al coun­ter­part.

Red sofa and three air conditioners

conventional air conditioner

A con­ven­tion­al appli­ance should reg­u­late the tem­per­a­ture in a room based on on the read­ings of the tem­per­a­ture sen­sor — the lat­ter is set by the user. The bot­tom line is that when the spec­i­fied indi­ca­tor is exceed­ed, the device sim­ply turns off. Nat­u­ral­ly, after some time, the tem­per­a­ture begins to rise, so it is switched on again, dur­ing which a con­ven­tion­al air con­di­tion­er starts to oper­ate at full capac­i­ty. Thus, the tech­nique works all the giv­en time.

Such switch­ing on and off does not have the best con­se­quences:

  • peak load on the device at the time of launch;
  • pow­er surge (increased ener­gy con­sump­tion);
  • wear of machine parts.

It turns out that a non-invert­er device works cycli­cal­ly. And in order for its engine to accel­er­ate, large start­ing cur­rents are con­sumed. After the start has occurred, the com­pres­sor begins pump­ing 50% of the total vol­ume of fre­on from the low pres­sure zone to the high one. At the same time, all sys­tems are used to the max­i­mum.

How is the pres­sure nor­mal­ized after the oblig­a­tory shut­down of the com­pres­sor? The throt­tle sys­tem is respon­si­ble for this. But in any part of the sys­tem remains fre­on boil­ing risk (can occur in the line, and in the receiv­er, and in the cap­il­lary tube). And the unused poten­tial cold comes out, irra­tional­ly cool­ing the air out­side. Of course, there is com­pen­sa­tion, but it is small — at the same time, cold is gen­er­at­ed in the room. To some extent, this equal­izes the loss­es when the com­pres­sor is turned on again.

inverter model

The air con­di­tion­er with an invert­er is dif­fer­ent than con­ven­tion­al mod­els. Here, the con­trol unit con­verts the alter­nat­ing cur­rent to direct cur­rent, and then con­verts it back to alter­nat­ing cur­rent, but already at the cur­rent fre­quen­cy.

Know­ing physics will help answer the ques­tion of what an invert­er is in an air con­di­tion­er. It turns out that the invert­er is aimed at rais­ing and low­er­ing the nor­mal fre­quen­cy of the net­work. This invert­er pow­er con­trol of the air con­di­tion­er formed the basis for the name of the device. It affect­ed change in engine speed com­pres­sor, and, there­fore, on its per­for­mance.

The prin­ci­ple of oper­a­tion of the invert­er air con­di­tion­er is as fol­lows. The device has a ther­mo­stat, pro­vid­ed as a stan­dard tem­per­a­ture meter, how­ev­er, when the desired lev­el is reached, it does not turn off, but sim­ply reduces the pow­er in oper­a­tion (leav­ing only 5–10% of the usu­al one).The tem­per­a­ture in this case will fall much more slow­ly, but when the accept­able thresh­old is passed, the com­pres­sor will start again. The invert­er com­pres­sor oper­ates in the range of 1–1.5 degrees (com­pared to con­ven­tion­al ones, in which such data varies from 1 to 5 ° C). In this case, there will be no absolute load on the device.

The invert­er air con­di­tion­er cir­cuit includes the usu­al out­door and indoor units.

  1. Ele­ments such as a com­pres­sor are locat­ed in the out­er one, fol­lowed by a sys­tem fil­ter with fre­on, then a fan for cool­ing fre­on and a con­denser are adja­cent. Also worth men­tion­ing is the con­trol board and con­nec­tions.
  2. Now about the indoor unit: the first thing to men­tion is the evap­o­ra­tor for cool­ing the air, the fan, the details of the shut­ters, as well as the fil­ter and the drip tray into which the con­den­sate flows.

The device of two types of air conditioners

Pros and cons of using inverter systems

Hav­ing fig­ured out what the name of the mod­el “invert­er split sys­tem” means, it’s time to talk about the pros and cons of the units. First, about bonus­es — even after a short peri­od of use, users have time to appre­ci­ate the ben­e­fits of such a tech­nique.

  1. The dif­fer­ence between an invert­er air con­di­tion­er and a con­ven­tion­al one is that it has no restric­tions in oper­a­tion (for a tra­di­tion­al device, this is no more than 8 hours per day).
  2. You don’t have to wor­ry about net­work con­ges­tion. And their absence is already ener­gy sav­ing in the range from 30 to 50%. When pay­ing util­i­ty bills, the dif­fer­ence is sig­nif­i­cant.
  3. The device can be called eco­nom­i­cal — there are no “idle loads”.
  4. The set tem­per­a­ture is main­tained exact­ly.
  5. The impact of the air flow also becomes more com­fort­able: dur­ing con­di­tion­ing, a soft air flow of 12–15 ° C will come out. This reduces the like­li­hood of get­ting sick (as hap­pens when using an ordi­nary ana­logue).
  6. Reduced noise lev­el (only 19–23 dB) allows you to oper­ate such a device even at night (in com­par­i­son, for the usu­al ver­sion it is 30–32 dB).
  7. Long ser­vice.
  8. Final­ly, a device with an invert­er will help heat the room even at tem­per­a­tures reach­ing ‑25 degrees.

Comparative characteristics of devices

There are cer­tain dis­ad­van­tages of invert­er air con­di­tion­ers.

  1. “Zest” in the form of soft ther­moreg­u­la­tion is not suit­able for every room. What is ide­al for bed­rooms and chil­dren’s rooms, will absolute­ly not cope with cre­at­ing a com­fort­able atmos­phere in offices and oth­er pub­lic places (peo­ple are con­stant­ly enter­ing and leav­ing, clos­ing and open­ing win­dows).
  2. You should not put an invert­er air con­di­tion­er in the kitchen, its oper­a­tion will be dis­turbed by heat from a ket­tle or stove. Cli­mate tech­nol­o­gy sim­ply can not cope with such con­stant changes in tem­per­a­ture.
  3. Not the last word for the main­tain­abil­i­ty of devices. For exam­ple, the vari­eties of invert­er and non-invert­er com­pres­sors are exact­ly the same, but if the elec­tron­ic board fails, then its replace­ment will cost at least 10,000 rubles. And spare parts can­not be found in the gen­er­al sale.
  4. For eco­nom­ic rea­sons, it is unprof­itable to oper­ate such a unit in a coun­try house, which is rarely vis­it­ed by res­i­dents.
  5. Final­ly, high price device makes it prob­lem­at­ic for every­one to pur­chase it.

The best models of inverter air conditioners in 2020

Today, the split sys­tem of the pre­sent­ed invert­er type is a devel­op­ment prod­uct of almost all man­u­fac­tur­ers spe­cial­iz­ing in the pro­duc­tion of cli­mate con­trol equip­ment. Among them are such names as Daikin, Toshi­ba, Pana­son­ic, Mit­subishi and many oth­ers. Each brand has its pros and cons of work­ing.

The list of the best mod­els of air con­di­tion­ers in 2020 was com­piled based on an analy­sis of their tech­ni­cal char­ac­ter­is­tics, the ratio of cost to expect­ed qual­i­ty, and user reviews.

Ballu BSDI-07HN1

Bal­lu BSDI-07HN1 com­bines excel­lent func­tion­al­i­ty, high qual­i­ty, styl­ish design and rel­a­tive­ly low price. The pow­er of the device oper­at­ing in the “heat” mode is 2.3 kW, for cool­ing 2.2 kW. These are aver­age fig­ures, but for a full-fledged, high-qual­i­ty ser­vice of the vol­ume that is declared, these val­ues ​​are more than enough. This air con­di­tion­er has an “ion­iza­tion” option, which is extreme­ly rare in this price range, as well as all the func­tions that should be in it for com­fort­able oper­a­tion.

Ballu BSDI-07HN1


  • many oper­at­ing modes, includ­ing warm start and air ion­iza­tion;
  • styl­ish, com­pact indoor unit (71 cm);
  • “cli­mate con­trol” — auto­mat­ic main­te­nance of the set oper­at­ing para­me­ters;
  • high qual­i­ty mate­ri­als and assem­bly;
  • there is a timer, you can pro­gram the on and off for a cer­tain time;
  • night mode is real­ly qui­et and com­fort­able.


  • a max­i­mum flow of 7 cubic meters / min will seem insuf­fi­cient to some­one.


This air con­di­tion­er with invert­er com­pres­sor belongs to the same price cat­e­go­ry as Bal­lu BSDI-07HN1, but has slight­ly high­er pow­er and speed (2.7 kW for cool­ing and 2.8 for heat­ing, the max­i­mum flow can reach 7.5 cubic meters /min). AUX ASW-H09B4/LK-700R1DI works almost silent­lythe indoor unit emits sound up to 24 dB, it is not audi­ble even at night.


There is also ion­iza­tion, but the abil­i­ty to con­trol the air con­di­tion­er via Wi-Fi (as an option) is added to the list of func­tions.


  • mul­ti-stage air fil­tra­tion at the out­let, suit­able even for aller­gy suf­fer­ers dur­ing the sea­son­al peri­od;
  • there is a dis­play with visu­al­iza­tion of ser­vice infor­ma­tion;
  • a new gen­er­a­tion invert­er has been installed, which increas­es the effi­cien­cy of the air con­di­tion­er;
  • high ener­gy effi­cien­cy class.


  • to work with Wi-Fi, you need to buy addi­tion­al equip­ment.

Mitsubishi Heavy Industries SRK20ZSPR‑S / SRC20ZSPR‑S

This is a split sys­tem from a pres­ti­gious Japan­ese brand, which is com­pa­ra­ble in price to inex­pen­sive Chi­nese mod­els. This mod­el is assem­bled in Thai­land under the con­trol of the brand. The con­di­tion­er has a full set of nec­es­sary func­tions. The reli­a­bil­i­ty of the Mit­subishi Heavy Indus­tries invert­er is high, there are no ser­vice calls with prob­lems. Qual­i­ty can be seen in every­thing: dense, pleas­ant to the touch and eye, non-creak­ing plas­tic, excel­lent assem­bly with­out gaps and back­lash, well-coor­di­nat­ed work of the sys­tem.

Mitsubishi Heavy Industries SRK20ZSPR-S / SRC20ZSPR-S


  • reli­a­bil­i­ty and qual­i­ty from a well-known brand;
  • good pow­er char­ac­ter­is­tics, the air con­di­tion­er quick­ly and effi­cient­ly heats and cools large rooms;
  • full set of func­tions;
  • in the “clean­ing” mode, the sys­tem dries the heat exchang­er for 2 hours after turn­ing it off;
  • Hi pow­er modes (quick access to a giv­en mode of oper­a­tion) and Econom;
  • intu­itive con­trol, the pres­ence of “smart” options;
  • war­ran­ty peri­od 3 years.


  • only 3 fan speeds;
  • no indi­ca­tor light on remote con­trol.

Electrolux EACS/I‑09HM/N3_15Y

A pow­er­ful split sys­tem that has all the best from Elec­trolux: excel­lent qual­i­ty and reli­a­bil­i­ty, func­tion­al­i­ty accord­ing to advanced con­sumer require­ments, ele­gant design. The pow­er of the air con­di­tion­er is 2450 W when work­ing for cool­ing and 2800 W when heat­ing. At the same time, the declared ser­vice area is 25 square meters. In fact, with such pow­er para­me­ters, the air con­di­tion­er can eas­i­ly warm the area twice as much. You can safe­ly buy it not only in the apart­ment, but also in the office.

Electrolux EACS/I-09HM/N3_15Y

In this mod­el the heat exchang­er with an anti­cor­ro­sive cov­er­ing is installed. Low-volt­age and low-tem­per­a­ture start-up of the sys­tem is pro­vid­ed.


  • there is a built-in surge pro­tec­tor that reli­ably pro­tects against surges in the net­work;
  • eco­nom­i­cal: high ener­gy effi­cien­cy class;
  • good pow­er allows you to almost instant­ly reach the set mode (both for heat and cold);
  • advanced fil­tra­tion sys­tem, there is a fil­ter for deodor­iza­tion and antibac­te­r­i­al air treat­ment;
  • elec­tric adjust­ment of the direc­tion of air flow;
  • self-clean­ing and defrost modes.


  • incom­plete instruc­tion man­u­al;
  • There are but­tons on the remote that do noth­ing.


This mod­el in its func­tion­al set is sim­i­lar to the pre­vi­ous one. It also has a cool fil­tra­tion sys­tem that pro­vides 100% air purifi­ca­tion, air direc­tion con­trol, auto­mat­ic defrost. Only the Sam­sung AR09RSFHMWQNER is even more pow­er­ful, faster and more effi­cient. The air con­di­tion­er pow­er is 2600W/3200W, and the max­i­mum air speed is 9.6cbm/min. These two mod­els cost about the same, about 30 thou­sand rubles.



  • qui­et and smooth oper­a­tion, soft change of modes and adjust­ments;
  • huge pow­er, high effi­cien­cy;
  • nice mate­ri­als and qual­i­ty assem­bly;
  • dry­ing mode;
  • the noise lev­el for the indoor unit is only 19 dB, this is one of the best indi­ca­tors.


  • rather large indoor unit (82 cm).

Tips for buying any of these devices

To choose the right split sys­tem with invert­er con­trol, you need to lis­ten to the fol­low­ing rec­om­men­da­tions.

  1. If the bud­get is lim­it­ed, it is bet­ter not to buy the cheap­est invert­er mod­el avail­able. Let it be a reg­u­lar split, but from a well-known man­u­fac­tur­er and hav­ing a good rep­u­ta­tion.
  2. It is bet­ter to choose a mod­el with great pow­er capa­bil­i­ties, espe­cial­ly if you plan to install it in the bed­room or chil­dren’s room. Such a device will work with­out noise and draft.
  3. Instal­la­tion of the sys­tem should be entrust­ed only to pro­fes­sion­als. Accord­ing to ser­vice cen­ters, 80% of all break­downs are caused by illit­er­ate instal­la­tion.
  4. It is best to install in the spring, and not in the “hot sea­son”, when there are a lot of offers from incom­pe­tent spe­cial­ists.

Preventive work

Even a state of the art air con­di­tion­er can fail with­out prop­er main­te­nance. It is impor­tant to know that invert­er-con­trolled split sys­tems require cer­tain main­te­nance rules to be fol­lowed.

  1. Do not allow liq­uid to enter the cold cir­cuit. This is fraught with the for­ma­tion of acid, which will cor­rode the insu­la­tion of the engine.
  2. It is impor­tant to con­stant­ly mon­i­tor the lev­el of oil and refrig­er­ant used. Fre­on will decrease — the pres­sure in the sys­tem will also drop, which means that the device will start to work for wear.
  3. impor­tant and reg­u­lar clean­ing the heat exchang­erbecause the accu­mu­la­tion of dirt is a direct path to its over­heat­ing, pres­sure increase and load.

Fail­ure to fol­low these instruc­tions may result in dam­age to the device.

Infor­ma­tion about what invert­er split tech­nol­o­gy is allows you to under­stand the prospects for its use in all its beau­ty. But is it worth it to over­pay for its pur­chase? The answer will be this: with a small bud­get, it is bet­ter to opt for con­ven­tion­al air con­di­tion­ers, but of the high­est class. There are ser­vice cen­ters avail­able where they can pro­vide qual­i­fied assis­tance.

Air con­di­tion­ers of this type can be rec­om­mend­ed for instal­la­tion in apart­ments — res­i­dents will appre­ci­ate the “soft” cold and qui­et oper­a­tion. But if there are con­stant pow­er surges in the house, it is bet­ter to refuse such a pur­chase. And one more thing: you should not think that the device will quick­ly pay for itself due to its ener­gy-sav­ing con­sump­tion. Accord­ing to experts, such a peri­od should be at least 5 years — dur­ing this time, no equip­ment is insured against break­downs and over­loads.

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