Room Air Conditioner with a Thermoelectric Heat Pump

A room air conditioner comprising:

• a thermoelectric heat pump including an output plate and an input plate;
• an indoor heat exchanger with air flow paths therethrough thermally connected to the output plate and configured in operation to exchange heat with indoor air;
• an outdoor heat exchanger thermally connected to the input plate and configured to exchange heat with an outdoor environment;
• a sensor to sense a measurand for a cooling or a heating demand;
• a controller to generate output based on the sensor output and based on a setpoint to set a performance of the thermoelectric heat pump in accordance with its output;
• wherein in a simply connected region on the indoor heat exchanger, straight passages through the indoor heat exchanger in line with the main air flow towards them in operation contribute less than 44% to the frontal area of the region;
• the corresponding part of the indoor heat exchanger extends to where a thermal connection to the output plate;
• the frontal area of the region is at least half the frontal area of the indoor heat exchanger;
• and
• at least some air flow paths through the indoor heat exchanger do not include such a straight passage.