There are no reputable international schools in Hefei. Simply put, the expat community is too small to justify international schools. Hefei currently does have international programs in No. 1 and No. 8 high schools, but their quality is currently lacking compared to similar programs in first tier cities.
As Asussie Mike said, there are some 'International Schools' but as I said above, they are far from reputable. To clarify what I mean by reputable, they are not certified by any western organization nor do they belong to any international school accreditation program (i.e. IB Schools).
Some public schools in Hefei do have English language instruction, but again, these schools are not accredited by an western organization. You can send your child to a Chinese public school which will teach in English, but I would be highly skeptical of the quality of education. For example, there's no guarantee that the individual teaching your child has any qualifications or experience, it could just be some bloke looking for a year of fun in the sun.
I don't mean to put you off, only say that there doesn't exist in Hefei any school which meets any kind of western education quality. You can send your child to school, that is not an issue. The issue is that you may find yourself disappointed in the quality.