# US 12,504,184 B1 · Ventilation rooftop air-conditioning system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,504,184 B1 - Document ID: US12504184B1 - Status: Granted - Kind: B1 - Application number: 19/334,968 - Filed: 2025-09-22 - Granted: 2025-12-23 - Earliest claimed: 2025-09-15 - Assignees: velit cooling & heating. LLC - Applicants: velit cooling & heating. LLC - Inventors: Xiaoyue Zhou - Web page: https://patentgrep.com/patent/US12504184B1 ## CPC - F24F 7/025: {with forced air circulation by means of a built-in ventilator} - F24F 13/082: {Grilles, registers or guards} - F24F 13/20: Casings or covers - F24F 2221/16: mounted on the roof - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) ## Abstract A ventilation rooftop air-conditioning system includes a housing unit, an air blower unit and an air-conditioning unit, wherein the housing unit includes a main body and a lid body, and a fixing element is disposed in the interior of the main body, and the interior of the main body is divided into a circulation channel and a ventilation channel by the fixing element, and an evaporator is disposed on the fixing element; wherein the ventilation rooftop air-conditioning system has a ventilation mode in which air flows in the ventilation channel and does not pass through the evaporator and a circulation mode in which air passes through the circulation channel, the evaporator and the ventilation channel in turn. ## Claims ### Claim 1 A ventilation rooftop air-conditioning system, comprising: a housing unit comprising a main body, a lid body and a fixing element disposed in the main body to define a circulation channel and a ventilation channel, wherein the circulation channel has an air inlet, and the ventilation channel has an upper air vent and a lower air vent, wherein the upper air vent is opened or closed by means of the lid body; an air blower unit disposed between the upper vent and the lower air vent; and an air-conditioning unit which comprises an evaporator which is disposed on the fixing element, wherein the circulation channel is communicated to the ventilation channel through the evaporator; wherein the ventilation rooftop air-conditioning system has a ventilation mode in which air flows in the ventilation channel and does not pass through the evaporator and a circulation mode in which air passes through the circulation channel, the evaporator and the ventilation channel in turn. ### Claim 2 (depends on 1) The ventilation rooftop air-conditioning system according to claim 1, wherein the ventilation channel has an upper area and a lower area, and the air blower unit is disposed between the upper area and the lower area, and the evaporator is disposed within the upper area. ### Claim 3 (depends on 2) The ventilation rooftop air-conditioning system according to claim 2, wherein the air-conditioning unit comprises a first filtering element and a second filtering element, and the first filtering element is disposed in the upper area, and the first filtering element is arranged to block the ventilation channel; the second filtering element is disposed in the circulation channel to block the circulation channel. ### Claim 4 (depends on 1) The ventilation rooftop air-conditioning system according to claim 1, wherein the fixing element has an extension portion which extends in a direction away from the ventilation channel, and the evaporator is connected to the extension portion, and at least part of the circulation channel forms a bent segment through the extension portion. ### Claim 5 (depends on 1) The ventilation rooftop air-conditioning system according to claim 1, wherein a ventilation area of the evaporator is a first ventilation area S1, and a ventilation area of the air inlet is a second ventilation area S2, and a ventilation area of the lower air vent is a third ventilation area S3, wherein S1>S2, and S1>S3. ### Claim 6 (depends on 1) The ventilation rooftop air-conditioning system according to claim 1, wherein the air blower unit comprises a reversible motor having an output shaft, a connecting frame and a plurality of blades, and the reversible motor is fixed and installed in the ventilation channel through the connecting frame, and the plurality of blades are arrayed on the output shaft of the reversible motor, and the reversible motor drives the plurality of blades to rotate clockwise or counterclockwise. ### Claim 7 (depends on 1) The ventilation rooftop air-conditioning system according to claim 1, wherein the air-conditioning unit comprises a condenser, a condensing fan and a compressor, and the condensing fan is disposed on the condenser, and the condenser is connected with the evaporator through the compressor. ### Claim 8 (depends on 7) The ventilation rooftop air-conditioning system according to claim 7, wherein the housing unit comprises a base, and the main body, the compressor and the condenser are mounted on the base, and at least part of the main body penetrates through the base. ### Claim 9 (depends on 1) The ventilation rooftop air-conditioning system according to claim 1, wherein the housing unit comprises a grille element which covers the air inlet. ### Claim 10 (depends on 1) The ventilation rooftop air-conditioning system according to claim 1, wherein the lower air vent is provided with a plurality of deflecting plates which are arrayed and arranged in parallel. ### Claim 11 (depends on 1) The ventilation rooftop air-conditioning system according to claim 1, wherein a rotating shaft and a lifting rod are set on the main body, and the lifting rod is configured to drive the lid body to rotate with respect to the rotating shaft to open or close the upper air vent. ### Claim 12 (depends on 1) The ventilation rooftop air-conditioning system according to claim 1, wherein an ascending and descending mechanism is disposed on the main body to drive the lid body to approach or move away from the upper air vent. ### Claim 13 (depends on 12) The ventilation rooftop air-conditioning system according to claim 12, wherein the ascending and descending mechanism is a cylinder, and a reciprocating shaft of the ascending and descending mechanism is connected with the lid body.