public function searchBatchByNumberAction()
 {
     $wh_id = $this->_request->getParam('wh_id', '');
     $batch_no = $this->_request->getParam('batch_no', '');
     if (!empty($wh_id) || !empty($batch_no)) {
         $coldchain = new Model_ColdChain();
         $result = $coldchain->searchBatchByBatchNo($wh_id, $batch_no);
     } else {
         $result = array("error" => "Please provide these params. e.g. (?wh_id=1&batch_no=I1010)");
     }
     echo Zend_Json::encode($result);
 }