I just got this exact one last year for about the same price on Amazon ($14) for use in my Car...

https://www.amazon.com/dp/B07QPS15YK/ref=redir_mobile_desktop?_encoding=UTF8&aaxitk=888f24d147dfd3b38c7ea937e385e4c0&hsa_cr_id=6082663070101&pd_rd_plhdr=t&pd_rd_r=7e99972c-bbeb-431a-8b72-eeca764e25dd&pd_rd_w=CRvjr&pd_rd_wg=DFUME&ref_=sbx_be_s_sparkle_mcd_asin_0_img

If your cars 12V outlet works while your car is off, then something like this and a cheap fan could work.

https://www.amazon.com/Buywhat-Inverter-Converter-Adapter-Computer/dp/B07QPS15YK/ref=sr\_1\_2\_sspa?keywords=12v+car+adapter+to+wall+plug&qid=1657706897&sprefix=12+v+car+a%2Caps%2C114&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExVVhVVk1ONERBODhKJmVuY3J5cHRlZElkPUExMDEwNDIzM0JGUDdJMkwyQ0xKQSZlbmNyeXB0ZWRBZElkPUEwNDY0MjE2MVNEQlVVMzJWQVFCMyZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=