How to use the patent retrieval system of China National Intellectual Property Administration government website to retrieve China patents with the technical theme of "transformer cooling"

If you just want to search for patents related to this, there are no other restrictions. You can write "Transformer and Cooling" in the summary column, and then search for elements. Of course, as far as possible, use the words that you think will appear or may appear in the patent (abstract is an overview of a patent), and use the words you think to make a more concentrated combination to see the search results. For example, there is "heat dissipation" close to "heat dissipation". Choose words according to the technical content you want to retrieve.

If there are other restrictions such as patentee, inventor and name in the search target, just fill in the corresponding keywords.

In fact, China National Intellectual Property Administration's website is not as good as soopat's website when searching for domestic patents, because the first page of the patent can be directly seen with an abstract in the results of soopat's search. It is easier to judge whether this patent is what you need by looking at pictures than words, and there is an abstract on the first page, which can also be judged by reading the abstract.