buy 7mm brass tube
author:MF manufacturerstime:2022-03-14 18:10:49
Air conditioners rely on refrigerants to carry heat，heating in winter，As the outdoor ambient temperature decreases，Refrigerant unit density decreases，Can't fully evaporate in the outdoor heat exchanger，compressor suction（gaseous refrigerant）insufficient，Reduced flow of refrigerant circulating through the air conditioning system，Air conditioning system operating below design capacity，Heating is attenuated，Heating energy efficiency ratio（COP）also decreased。
The lower the outdoor ambient temperature，The more serious the heating attenuation of the air conditioner。According to Midea、Gree、Hisense、Test results from manufacturers such as Panasonic，When the ambient temperature is lower than2℃，Air conditioner heating is attenuated，2℃It is also a low temperature test condition for household air conditioners.。When the ambient temperature is lower than-5℃，Sharp reduction in refrigerant evaporation，The heating capacity of the air conditioner can only reach the set capacity60%about，General air conditioning is below zero5℃to minus zero7℃Turn on auxiliary heating，At this time, the air conditioner is used as an electric heater。
In general，Ordinary household air conditioners are7℃ arrive below zero7℃outdoor environment design，to be below zero7℃stable heating，Need to use「air jet enthalpy」compressor air conditioner。
MatsushitaEVIt is currently on sale in the country，The only one with jet enthalpy technology、On-hook household air conditioners that support low-temperature heating，below zero12℃Heating does not decay，Minimum support minus zero20℃heating。
MatsushitaEVseries total5configuration，Dismantled today「E13VKQ2」，YesEVa series of1.5Pixin secondary air conditioner on-hook，Let's start dismantling。
Appearance and heat transfer capacity
(buy 7mm brass tube)
MatsushitaEVFront and back of the outdoor unit
MatsushitaEVThe size of the outer unit，width with valve825mm、without valve780mm，This width is normal。MatsushitaEVThe height of the outdoor unit is626mm，and ordinary1.5Air conditioner height at550mmabout。
Panasonic Air Conditioner1.5Available in three sizes，The difference is mainly in the height，have542mmand626mmtwo：
- 825×626×320mm：Panasonic regenerative air conditioner
- 780×626×289mm：Level 11.5matchE1、G1、J1、D1、H1；secondary1.5matchEV
- 780×542×289mm：other Panasonic1.5Level 1、secondary、Level 3
Panasonic Thermal Storage and PanasonicEVHeating-heavy air conditioners，Outer size is bigger，It means that the heat exchange capacity of the external machine may be stronger。
MatsushitaEV（Left）、Dajin Zero Realm（middle）、MitsubishiRY（right）
(buy 7mm brass tube)
To make the difference more obvious，I put the big gold in the warehouse、MitsubishiRYalso turn out，Panasonic can be seenEVis the highest size。
MatsushitaEVOuter side
MatsushitaEVThe top cover and sides are thicker，External machine spray paint evenly，good workmanship。
(buy 7mm brass tube)MatsushitaEVExternal machine parameters
- Refrigerant：R410a/1150g
- Outdoor unit weight：34kg
- manufacturing date：2020year11moon
MatsushitaEVuseR410aRefrigerant，convert toR32The refrigerant is about920g，a lot of refrigerant。Now1.5Most of the new grades are in600~840g。
MatsushitaEVRemove the top cover，It can be seen that it is a double row condenser，The control panel is huge，with metal fireproof panel
MatsushitaEVThe heat sink area of the electronic control board is quite large
MatsushitaEVFront and back dismantling diagrams of the outdoor unit
(buy 7mm brass tube)
MatsushitaEVInternal and external heat exchangers with silver coating，support「Nano water purification membrane」Technology，Has a certain anti-fouling and dust-removing function，Defrost time can also be shortened。
MatsushitaEVThe condenser of the outdoor unit is a double row of copper pipes，each row14Group，common56copper pipe
MatsushitaEV，Copper tube length and copper tube outer diameter with fins
(buy 7mm brass tube)
MatsushitaEVThe length of the copper pipe with the finned part is approx.76cm，Copper tube outer diameter7mm，total length of copper pipe56copper pipe×76cm，about42.5Meter，and mainstream1.5The length of the new level is basically the same。Although the length of the copper pipes is basically the same，But PanasonicEVThe heat exchanger is more square，Larger cooling area，And the whole heat exchanger is well ventilated，The overall heat transfer capacity is still stronger。
MatsushitaEVUse of external fan40wJingma DC Motor
(buy 7mm brass tube)
Air conditioning external fan motor，More good brand：Chichus、Wolong、Capital、Fu Tianjiang, etc.。Panasonic and Jingma signed a strategic cooperation agreement，At present, Panasonic motor is dominated by hemp，Mitsubishi motor uses Wolong，Fujitsu mainly uses its own rich Tianjiang，Chichus motor，Daily brand and Haier use more。
MatsushitaEVField fan
Panasonic external machine uses a gull wing shaft flow，Bionic design makes fan motors save power，Can also reduce operation noise。There is no label diameter on the blade，I quoted about it.426mm。The red arrow is a screw in the figure.，Can be removed，This is a relatively rare blade balance design，Quite interesting。
Jet 増 増 压 compressor and refrigerant circuit
(buy 7mm brass tube)MatsushitaEVJet，Outside package, two layers, thick sound cotton
MatsushitaEVUse Mei Zhi Jetunction toggle Compressor，ModelEAQN108D43UFS，Displacement10.8cc，MatsushitaEVIt is also the only air conditioning hang up in China.。
MatsushitaEVJets and junction compressors with two electronic expansion valves，All flow
MatsushitaEVElectronic expansion valve，Secure the housing of the buckle and outer machine housing，This design of the electronic valve is also extremely rare。
(buy 7mm brass tube)
MatsushitaEVYes, jet, junction compressor，In contrast to ordinary air conditioners increased inhalation，Electronic expansion valve、Electromagnetic second-pass valve, etc. are electronically controlled，In addition to pipelines，The valve also has wires.。I deliberately put HualingHL1Also moving to the disassembly comparison，Can appear to be looseEVPipeline complex。
MatsushitaEV（Left），HawangN8HL1（right）
Normal air conditioner is in heating，Refrigerant flows directly from the outdoor heat exchanger to the compressor。
(buy 7mm brass tube)
「④Electromagnetic two-way valve」When the outdoor environment is lower than0℃，Qi loop open，Air conditioning start jet 焓 function。- Pneumatic circuit：After the refrigerant comes from the indoor heat exchanger，First pass「①Qi loop electronic valve」，After the throttle is entered「③Flicker」，Flash is evaporated here，Small part of the vaporized medium temperature refrigerant passes「⑤Compressor pins」Enter the compressor。
- Normal circuit：Liquid refrigerant after separation by flash，Then pass again「②Normal circuit electronic valve」Thrifty，Enter outdoor heat exchanger evaporation，After going back to the compressor，This is the normal heating process of air conditioning。
(buy 7mm brass tube)
Compared with ordinary air conditioners，MatsushitaEVAn electronic expansion valve、Flash、Electromagnetic two-way valve（Can be turned on or off）
