Therefore, it is very necessary to know some technical terms. On the premise of understanding, according to your own budget and needs, you can better choose the refrigerator that suits your home.
Refrigerators are divided into single door, double door, three door, opposite door and multiple doors (including cross opposite door, French door, Japanese door, etc.). There is no such thing as "Japanese multi-door" in Japan, but they still define it as a French multi-door refrigerator. This paper calls it "Japanese multi-door refrigerator", aiming at distinguishing this multi-door refrigerator which has been localized and improved in the island country from the traditional French refrigerator.
Structure principle, technical types and functional parameters of refrigerator
1. Basic structure and working principle of refrigerator
Refrigerator is mainly composed of refrigeration system, control system, door and accessories. Refrigeration and heat insulation are the two foundations of refrigerator.
2. Technical type of refrigerator
Now it's time to focus on the technical types of the article, the most important of which is the refrigeration mode and circulation system, which is also the place where merchants are most likely to steal concepts when buying refrigerators!
(1) direct cooling, air cooling and mixed cooling
The direct-cooling refrigerator is characterized in that the evaporator directly contacts with the inner cavity or air in the cabin to absorb heat. Air-cooled (also known as "indirect cooling") refrigerators use fans to transport air to the evaporator cavity hidden on the back plate, absorb heat and then send it back indoors, and so on. Mixed cooling (also known as "direct air cooling") refrigerators are cooled directly in the refrigerating room and cooled by air in the freezing room. A lot of words, impatient friends, please look directly at the following purchase suggestions!
Purchase suggestion
The characteristics of forced convection, centralized heat exchange and automatic defrosting of air-cooled refrigerator conform to the development trend of large volume, multi-partition and humanization, and are suitable for most users.
The direct-cooling refrigerator is characterized by moisturizing the whole refrigerating room, and the price is relatively low. Suitable for users with limited budget and little demand for refrigerator volume, but with certain requirements for fruit and vegetable preservation.
The mixed cooling refrigerator gives consideration to high moisture retention and frost-free freezing. However, it is not the best solution for large-scale cold storage because of its high manufacturing cost and low space utilization rate, which fails to break through some restrictions of direct-cooling refrigerator.
(2) Single cycle and multiple cycles
Single cycle and multi-cycle of refrigerator refer to the structural types of refrigeration circuit. In a single refrigeration cycle system, the refrigerant flows along a single path. In a multi-channel refrigeration cycle system, the circulation path of refrigerant is not unique.
There are several types of multi-channel refrigeration cycle systems. Taking parallel double cycle as an example, the refrigerating room and freezing room have independent throttling devices, evaporators and temperature sensors, and the refrigeration branch is connected in parallel with the freezing branch. Alternate operation of refrigeration mode and freezing mode: firstly, the refrigeration cycle is carried out, and the three-way valve is switched to the refrigeration cycle after the temperature of the refrigeration room reaches the set value.
Purchase suggestion
How to judge whether a refrigerator adopts multi-cycle refrigeration system or single-cycle refrigeration system?
For the direct-cooling refrigerator, the judgment is based on whether the refrigerating room and freezing room can independently adjust the temperature.
For air-cooled refrigerators, the judgment is based on whether there is an independent evaporator in the refrigerating room. Attention: multi-channel independent air duct ≠ multi-channel refrigeration cycle! Recognize the essence of "multi-cycle" and avoid being misled by the propaganda of the concept of stealing by merchants.
If your refrigerator purchase budget is not high, but you pay attention to the effect of refrigeration and preservation, you may wish to consider a double-cycle double-door or three-door refrigerator. However, multi-cycle refrigeration system is not an irreplaceable technical path to improve the performance of refrigerator, and it is a plus item rather than a necessary option.
(3) Constant frequency and frequency conversion
The fixed frequency and frequency conversion of refrigerator refer to the control mode of compressor. Constant-frequency compressor is a constant-speed compressor, which has only two states: start and stop. Variable frequency compressor is a variable speed compressor, controlled by variable frequency drive board, and the appropriate speed is selected according to the refrigeration demand.
Purchase suggestion
If the budget allows, frequency conversion air-cooled or mixed-cooled refrigerators are preferred. For ordinary two-door and three-door refrigerators, constant frequency or frequency conversion has little effect on temperature control and energy saving. High-quality fixed-frequency refrigerator with multi-cycle air cooling highlights is also worth considering.
There are many words. I suggest you collect them first and read them slowly when necessary ~
The following are the recommendations of high-quality refrigerators at various price points for reference only ~
(1) less than 2000 yuan
Single door refrigerator
If the rental party only wants to be cheap enough, it can consider Haier BC-93TMPF, Hisense BC- 100S/A, Rong Sheng BC- 10 1KT 1 or Meiling BC-92JC.
Duobang BC-72b/r
Minij BC- 12 1C
Two-door refrigerator
The cheapest double-system air-cooled double-door refrigerator on the market
Team leader BCD- 169 wldpd
Substitution model
Rong Sheng BCD-172wd11d
(2)2000~4000 yuan
Opposite door refrigerator
Meiling BCD-65 1WPUCX
Xinfei BCD-646WK9AT
Split three-door refrigerator
The three-door refrigerator solves the problem that the traditional two-door refrigerator cannot be equipped with an independent variable temperature chamber, which greatly improves the practicability.
Hisense BCD-398WFK 1DPQ
Xinfei BCD-496W6AT
Two-door refrigerator
Haier BCD-272 wdpd
Sanmen refrigerator
Midea BCD-230WTPzm (e)
The budget is 3000~4000 yuan. If you are more interested in performance and configuration, we recommend domestic brands of first-class energy-efficient frequency conversion air-cooled high-end three-door refrigerators with metal cooling backboards, such as Midea 32 1 and Rong Sheng 332; If you trust the joint venture brand more, we recommend Panasonic variable frequency air-cooled refrigerator or Bosch/Siemens mixed cooling zero temperature refrigerator.
③4000 ~ 6000 yuan
Opposite door refrigerator
Siemens) KA92NV02TI 02 ti
Bosch Kan 92 v 02 ti
Midea BCD-639 wk pzm (Hubei)
Optional capacity: 630L, 639L
First-class energy efficiency frequency conversion air cooling, PST+ ultra-magnetoelectric decontamination, independent ice maker on the door, Mo Landi gray panel.
④6000 ~ 8000 yuan
Opposite door refrigerator
Siemens) KA6 1EA03TI
Bosch) KAN92ENQTI
Cross door refrigerator
Bosch) KMF46A66TI
Bosch/Siemens frequency conversion mixed cooling zero-degree fresh-keeping double-door refrigerator
(5)8000~ 1 ten thousand yuan
Opposite door refrigerator
Bosch) KAN9AV240C
Cross door refrigerator
Bosch) KMF46S20TI
Japan multi-door refrigerator
Panasonic NR-ee 45pxa-n
Vacuum insulation (thin skin and big stuffing), nanoe nano-water ion sterilization, automatic ice making
(6) 1 ten thousand yuan or more
Opposite door refrigerator
Casarte BCD-627 wdclu 1
Bosch) KAN93S8ATI
Split three-door refrigerator
BOSCH)KAF96A66TI
Cross-split five/six-door refrigerator
Casarte) BCD-420WDGZU 1+0
"MSA controlled oxygen preservation" is an ice greenhouse preservation technology adopted by casarte flagship refrigerator, and its principle is "nitrogen filling preservation".
Japan multi-door refrigerator
Panasonic) NR-F522TXE-M-m
U vacuum insulation, nanoeX( 10 times the OH ion release of nanoe), and black mirror, with extremely high appearance value, is one of the most worthwhile high-end Japanese multi-door refrigerators in Panasonic.