On 3/22/21 12:33 PM, Willie via EV wrote:
Someone asked for link:
https://www.mitsubishicomfort.com/benefits/hyper-heating
There has to be a catch. How can they efficiently extract heat from
such cold air? I'm eager to learn details and see evaluations.
Here is one explanation:
Mitsubishi's Hyper-Heating H2i®
Mitsubishi's hyper-heating H2i® compressor motor signals that a burst of
heat is needed when the temperature gets below 40°F. Depending on the
temperature, the motor revs up accordingly and the system absorbs the
additional heat thrown off the compressor magnets. After the extra heat
is absorbed, it's funneled to the back of the blower.
That process supercharges your heat output. That's how Mitsubishi's
hyper-heating H2i® inverter compressor matches the heat that's needed
and quickly responds to the dropping temperature outside.
Also with Mitsubishi's “flash injection” bypass circuit, you avoid the
problem of decreasing amounts of refrigerant at sub-zero temperatures.
Flash injection helps increase the amount of the refrigerant circulating
between the indoor and outdoor units.
Refrigerant flow is increased when refrigerant is bypassed to the
compressor. It gives the system more stable and continuous heating -
even down at extreme temperatures. That's why Mitsubishi's hyper heat
systems can provide 100% of their rated capacity all the way down to 23°
F when other heat pumps can't.
https://gotductless.com/blogs/mitsubishi/hyper-heat-feature-review
So sounds like they add more refrigerant to compensate for cold weather,
and also use some excess heat form the compressor motor to pre-heat
things.
Jay
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