<?
$highLoadBlock = \Bitrix\Highloadblock\HighloadBlockTable::getList([
'filter' => ['=TABLE_NAME' => "b_hlbd_proizvoditeli"]
])->fetch();
$entity = \Bitrix\Highloadblock\HighloadBlockTable::compileEntity($highLoadBlock);
$vendorClass = $entity->getDataClass();
$dbVendors = $vendorClass::getList([
"filter" => [
"UF_NAME" => "search string"
]
]);
$vendors = [];
while ($vendor = $dbVendor->fetch()) {
$vendors[] = $vendor;
}