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Carcasa térmica sin ventilador para Raspberry Pi 4

El fabricante taiwanés Akasa ha diseñado una carcasa con refrigeración pasiva para Raspberry pi 4. Si tienes problemas de ruido debido al ventilador, esta carcasa lo soluciona definitivamente. Puedes ver los detalles del producto en su página http://www.akasa.com.tw

Este es el aspecto que presenta:

Sin embargo hay un gran inconveniente, ya que se supone que esta carcasa es para uso industrial y tiene el puerto de la tarjeta SD cancelado (como advierten en su página) . Para cambiar la tarjeta es necesario desmontar la parte inferior y extraer la propia raspberry.

Hemos hecho unas pruebas de temperatura para comparar. Se ha realizado test normal y test de stress durante 15 minutos con mi carcasa anterior (con ventilador) y con esta carcasa de Akasa (sin ventilador). Copiamos los resultados a continuación:

CON VENTILADOR – TEST NORMAL

pi@raspberrypi:~ $ while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& stress -c 4 -t 900s
[1] 18734
frequency(48)=600169920
stress: info: [18735] dispatching hogs: 4 cpu, 0 io, 0 vm, 0 hdd
temp=35.0’C
frequency(48)=1500398464
temp=40.0’C
frequency(48)=1500345728
temp=42.0’C
frequency(48)=1500398464
temp=43.0’C
frequency(48)=1500345728
temp=42.0’C
frequency(48)=1500398464
temp=43.0’C
frequency(48)=1500398464
temp=44.0’C
frequency(48)=1500398464
temp=44.0’C
frequency(48)=1500398464
temp=44.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500398464
temp=44.0’C
frequency(48)=1500398464
temp=45.0’C
frequency(48)=1500345728
temp=45.0’C
frequency(48)=1500398464
temp=44.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500398464
temp=45.0’C
frequency(48)=1500398464
temp=45.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500345728
temp=45.0’C
frequency(48)=1500398464
temp=45.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500398464
temp=45.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500345728


CON VENTILADOR – TEST DE STRESS

pi@raspberrypi:~ $ while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& ./cpuburn-a53
[1] 19615
frequency(48)=600117184
temp=36.0’C
frequency(48)=1500345728
temp=45.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500398464
temp=49.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500398464
temp=50.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500345728
temp=51.0’C
frequency(48)=1500345728
temp=50.0’C
frequency(48)=1500345728
temp=51.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500345728
temp=50.0’C
frequency(48)=1500345728
temp=51.0’C
frequency(48)=1500345728
temp=51.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=51.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=51.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500398464
temp=53.0’C
frequency(48)=1500398464
temp=53.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500398464
temp=52.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500398464
temp=53.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500398464
temp=53.0’C
frequency(48)=1500398464
temp=53.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=55.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500398464
temp=54.0’C
frequency(48)=1500345728
temp=54.0’C
frequency(48)=1500345728
temp=56.0’C
frequency(48)=1500345728
temp=55.0’C
frequency(48)=1500398464
temp=54.0’C


SIN VENTILADOR – TEST NORMAL

pi@raspberrypi:~ $ while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& stress -c 4 -t 900s
[1] 1320
frequency(48)=600169920
stress: info: [1321] dispatching hogs: 4 cpu, 0 io, 0 vm, 0 hdd
temp=36.0’C
frequency(48)=1500345728
temp=41.0’C
frequency(48)=1500398464
temp=41.0’C
frequency(48)=1500345728
temp=43.0’C
frequency(48)=1500345728
temp=42.0’C
frequency(48)=1500398464
temp=42.0’C
frequency(48)=1500345728
temp=43.0’C
frequency(48)=1500345728
temp=43.0’C
frequency(48)=1500345728
temp=43.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500398464
temp=43.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500398464
temp=44.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500345728
temp=45.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500398464
temp=45.0’C
frequency(48)=1500345728
temp=45.0’C
frequency(48)=1500345728
temp=45.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500398464
temp=49.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500398464
temp=49.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500345728
temp=50.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500398464
temp=49.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500398464
temp=49.0’C
frequency(48)=1500398464
temp=50.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500345728
temp=50.0’C
frequency(48)=1500398464
temp=49.0’C
frequency(48)=1500345728
temp=50.0’C


SIN VENTILADOR – TEST DE STRESS

pi@raspberrypi:~ $ while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& ./cpuburn-a53
[1] 1195
frequency(48)=600169920
temp=34.0’C
frequency(48)=1500345728
temp=41.0’C
frequency(48)=1500345728
temp=41.0’C
frequency(48)=1500345728
temp=42.0’C
frequency(48)=1500398464
temp=43.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500398464
temp=42.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500398464
temp=44.0’C
frequency(48)=1500345728
temp=45.0’C
frequency(48)=1500398464
temp=44.0’C
frequency(48)=1500345728
temp=44.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500345728
temp=46.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500398464
temp=47.0’C
frequency(48)=1500398464
temp=46.0’C
frequency(48)=1500345728
temp=47.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500398464
temp=49.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500398464
temp=48.0’C
frequency(48)=1500345728
temp=48.0’C
frequency(48)=1500398464
temp=50.0’C
frequency(48)=1500398464
temp=50.0’C
frequency(48)=1500398464
temp=50.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500345728
temp=49.0’C
frequency(48)=1500398464
temp=50.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500345728
temp=51.0’C
frequency(48)=1500345728
temp=51.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500398464
temp=52.0’C
frequency(48)=1500398464
temp=51.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500398464
temp=52.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=51.0’C
frequency(48)=1500398464
temp=53.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500398464
temp=52.0’C
frequency(48)=1500345728
temp=52.0’C
frequency(48)=1500345728
temp=53.0’C
frequency(48)=1500345728
temp=52.0’C

Los test demuestran que incluso bajo condiciones de alta carga en ningún momento se alcanzan temperaturas peligrosas, por lo que, si no planeas cambiar de tarjeta frecuentemente, puede ser un producto interesante.