Negative ion generator, after generating negative ions, where are the positively charged proton nuclei going?

The traditional negative ion generator technology is ionizing air. According to the principle of conservation of energy, a considerable number of positive ions will be released at the same time. As far as I know, there is a brand that only produces negative ions and does not release positive ions. This brand has a unique electron injection technology, which extracts electrons from the power grid and retains positive charges in the power grid, thus releasing only negative ions. This technology has also applied for a national patent, and you can also check it at the Intellectual Property Office.