Identify this 2 pin DC connector
A dehumidifier like this is similar to car refrigeration appliances. Searching for "power cord for car refrigerator" leads to results of the correct "B-type plug socket" (a search term suggested by RobertFay). However, searches for "Car C7", "IEC 320 C7" and/or "Type B" in popular search engines did not include the correct socket on my account.

Here is a technical drawing (taken from here).