Performance comparison of Mitsubishi, Hitachi and Daikin compressors The three brands are good. If you have to rank, first look at the performance of each brand! Compressor Daikin: domestic compressor, produced by Gree Mitsubishi: The original parts are imported! Won multiple energy-saving awards! Hitachi: Hitachi central air conditioners sold domestically are produced by Qingdao Hisense Hitachi Air Systems Co., Ltd., the full name is Hisense Hitachi central air conditioners! Hisense originally cooperated with Hitachi, but now it only uses Hitachi trademarks 2. Comfort Refrigeration is the basic function of air conditioning, and heating is the test of the strength of central air conditioning! Daikin does not work, Mitsubishi is the best, Hitachi is OK 3. Pipeline Daikin and Hitachi use welding, and Mitsubishi uses full pipe connection (to reduce leakage) 4. Single compressor capacity Daikin 6HP, Hitachi 6HP, Mitsubishi 18HP 5. Refrigerant technology Daikin: high performance cooling circuit, Hitachi: A simple stainless steel heat exchanger is used as a supercooler, which cannot be accurately controlled! Mitsubishi: No. 1 in the industry! Unique HIC circuit! ! Each brand of compressor has its own core technology patent, and each brand of compressor has different solutions for different needs. Choose the one that suits you, either expensive or best.
Compare the main indicators of similar products of each brand: Any electrical appliance will have the rated power and the maximum input power. Taking electrical appliances as an example here, the rated power refers to the electrical energy consumed per hour during normal operation of the equipment, and the maximum input power refers to the maximum electrical energy consumed by the electrical appliance in a certain environment. value. It is generally reflected in the fact that all the components of this electrical appliance are fully turned on or working at full load, and also refers to the electrical energy consumed by the powerful current generated by the high-power electrical appliance when it is started instantly. For example: if our TV has the highest brightness and the loudest speakers, the disco music (the subwoofer will be more frequent) then this is the most power-consuming time, then this is Maximum input power. Returning to the central air conditioner again, it belongs to a high-power electrical appliance. Its maximum input power point is the electrical energy consumed when the unit is just started. The rated power is not difficult to understand, that is, the power consumption after normal start. In the inverter air conditioner, it is also possible that the indoor unit is all turned on, and the power consumed by the external machine when running overclocked. In short, when considering the wiring load, the maximum input power must be calculated to avoid potential safety hazards! 2. The larger the COP value, the more efficient and energy-saving The COP value in the AR standard proposes the following definitions of winter and summer cycle efficiency: In winter heating, the ratio of heating capacity (W) to input power (W) is defined as the COP (coefficient of performance, W/W) of the heat pump; In summer cooling, the ratio of cooling capacity (W or Btu/h) to input power (W) is defined as the energy efficiency ratio EER (energy efficiency ration, W/W or Btu/W.h) of the heat pump In order not to cause ambiguity, we use COP (energy efficiency ratio) to express the heat pump cycle performance coefficient in winter and the energy efficiency ratio in summer heat pump. The calculation formula is: εs=Q0/Ne=Q0/N0·ηs=ε0·ηs Q0: The cooling capacity (or heating capacity) required by the refrigeration system N0: theoretical power of refrigeration compressor Ne: shaft power ε0: is the theoretical cooling coefficient (heating coefficient) ηs: is the total efficiency (adiabatic efficiency) The COP value (refrigeration efficiency) is actually the ratio of the cooling capacity (heating capacity) and input power that the heat pump system can achieve. Under the same operating conditions, the larger the ratio, the higher the efficiency of the heat pump system and the more energy-saving; At the beginning of the comparison of the COP value of the refrigeration system, we must first check whether each heat pump system is under the same working condition, and then calculate and compare. The COP factors that affect the unit are as follows: a. The performance coefficient of the compressor b. The system matching of the heat pump unit: (The so-called system matching refers to: the matching of the compressor, condenser, evaporator, throttle mechanism and automatic control system performance.) 3. Cooling and heating speed
4.Noise As you can see, we introduced two compressors, one is scroll type and the other is rotor type. Combined with the actual use of home central air conditioners, the probability of 50% load operating conditions is the largest (such as automobiles The maximum speed of the design is generally 240 yards per hour, but it is the most stable and energy-saving operation under 120 yards.) According to many years of tests and calculations, 6 horsepower is the critical point of compressor performance, rotor compressors below 6 horsepower are more efficient, and scroll compressors above 6 horsepower are more efficient. Performance comparison of Daikin, Mitsubishi and Hitachi compressors compressor The compressor is the heart of the air conditioning system and the core component of the air conditioner. To a large extent, it determines the energy saving and stability of the air conditioning system. At present, Daikin, Mitsubishi, and Hitachi are all excellent representatives in the field of high-end air-conditioning in the world, and they have demonstrated their scientific and technological strength in the field of compressors. So let's take a look at the performance comparison of their compressors. As you can see, we introduced two compressors, one is scroll type and the other is rotor type. Combined with the actual use of household central air conditioners, the probability of 50% load operating conditions is the largest (such as automobiles The maximum speed of the design is generally 240 yards per hour, but it is the most stable and energy-saving operation under 120 yards. According to many years of tests and calculations, 6 horsepower is the critical point of compressor performance. Rotor compressors below 6 horsepower are more efficient, and scroll compressors above 6 horsepower are more efficient.
to sum up: The advantages of Mitsubishi compressors are the excellent motor performance, and the core technology of both scroll and double rotor compressors with high pressure chamber and low pressure chamber; Hitachi Compressor's advantage lies in the inventor and leader of scroll compressors, with 32 years of technology precipitation; The advantage of Daikin compressor is the use of new materials, advanced technology and precise control system. Daikin, Mitsubishi and Hitachi are both benign competitions and have their own patents.
