# US 9,038,405 B2 · Solid state control system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,038,405 B2 - Document ID: US9038405B2 - Status: Granted - Kind: B2 - Application number: 12/806,977 - Filed: 2010-08-25 - Published: 2012-03-01 - Granted: 2015-05-26 - Earliest claimed: 2010-08-25 - Assignees: Rectorseal Corporation - Applicants: Christopher Cantolino; Mark Oudshoorn; Robert Dean Sells - Inventors: Christopher Cantolino; Mark Oudshoorn; Robert Dean Sells - Web page: https://patentgrep.com/patent/US9038405B2 ## CPC - F24F 11/38: Failure diagnosis - F24F 11/30: for purposes related to the operation of the system, e.g. for safety or monitoring - F24F 11/52: Indication arrangements, e.g. displays - F24F 11/62: characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values - F24F 13/222: {for evacuating condensate} - F25D 21/14: Collecting or removing condensed and defrost water; Drip trays - F24F 11/83: by controlling the supply of heat-exchange fluids to heat-exchangers - F24F 2110/00: Control inputs relating to air properties - F24F 2140/30: Condensation of water from cooled air - F25B 2600/0251: with on-off operation - 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) - F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B) - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS ## Abstract A control system to selectively control the operation of the compressor of a mini-split air conditioning system including at least one remote evaporator operatively coupled to the compressor to receive refrigerant therethrough, a sensor to monitor the operation of the evaporator and to generate an operating control signal to turn-off the compressor when a predetermined operating condition is sensed at the evaporator and a condensate drain pan to receive or catch condensate from the evaporator, the control system comprising a condensate sensor disposed to sense condensate in the condensate drain pan at a predetermined level and to generate a condensate level signal fed to a battery powered control device including an isolated solid state relay coupled to the sensor by a control coupling device to generate a condensate level control signal fed to the sensor causing the sensor to generate the operating control signal fed to turn off the compressor when condensate within the condensate drain pan reaches the predetermined level. ## Claims ### Claim 1 A control system to selectively control the operation of the compressor of an air conditioning system including at least one remote evaporator and a control sensor to sense at least one air conditioning system operating condition, the remote evaporator being operatively coupled to the compressor to receive refrigerant therethrough and an electronics system coupled between the compressor and the evaporator by a control link to selectively generate an operating control signal to turn-off the compressor when a predetermined operating condition is sensed at the evaporator by the control sensor and a condensate drain pan to receive condensate from the evaporator, said control system comprising a condensate sensor disposed to sense condensate in the condensate drain pan at a predetermined level and to generate a condensate level signal in response thereto, a control device coupled to said condensate sensor to receive said condensate level signal and to generate a control signal in response to said condensate level signal, said control device coupled to the control sensor of the evaporator to feed said control signal from said control device to the control sensor to generate a sensor control signal in response to said control signal, said control sensor coupled to the electronics system to feed said sensor control signal to the electronics system and said control device coupled to the electronics system to feed said control signal from said control device to the electronics system such that when said condensate level signal is generated the electronics system receives said control signal from said control device and said sensor control signal from the control sensor to generate the operating control signal to turn off the compressor when condensate within the condensate drain pan reaches the predetermined level, said control system further including a coupling harness to operatively couple said control device, the control sensor and the electronics system together, said coupling harness comprising a control device interface connector coupled to the electronics system and to the control sensor by an electronics system interface connector and a control sensor interface connector respectively to feed said control signal from said control device to the electronics system and to the control sensor when the condensate line in the condensate drain pan reaches a predetermined level, and the electronics system and the control sensor are coupled by said electronics system interface connector and said electronics system interface connector to feed said sensor control signal from the control sensor to the electronics system when the control sensor receives said control signal from said control device to operatively integrate said control system into an existing air conditioning system to feed said condensate level signal from said condensate sensor to said control device to feed said control signal from said control device to said control sensor and the electronic system and to feed said sensor control signal to the electronic system without compromising the integrity of the control link between the compressor and the electronics system. ### Claim 2 (depends on 1) The control system of claim 1 wherein said control sensor comprises a thermistor. ### Claim 3 A control system to selectively control the operation of the compressor of an air conditioning system including at least one remote evaporator and a control sensor to sense at least one air conditioning system operating condition operatively coupled to the compressor to receive refrigerant therethrough and an electronics system coupled between the compressor and the evaporator by a control link to selectively generate an operating control signal to turn-off the compressor when a predetermined system operating condition is sensed, said control system comprising a sensor disposed to sense the system operating condition and to generate a system operating condition signal when the system operating condition exceeds a predetermined level, a control device coupled to said sensor to receive said system operating condition signal and to generate a control signal in response to said system operating condition signal, said control device coupled to the control sensor to feed said control signal from said control device to the control sensor to generate a sensor control signal in response to said control signal, said control sensor coupled to the electronics system to feed said sensor control signal to the electronics system and said control device coupled to the electronics system to feed said control signal from said control device to the electronics system such that when said system operating condition signal is generated the electronics system receives said control signal from said control device and said sensor control signal from the control sensor to generate the operating control signal to turn off the compressor when condensate within the system operating condition exceeds the predetermined level, said control system further including a coupling harness to operatively couple said control device, the control sensor and the electronics system together, said coupling harness comprising a control device interface connector coupled to the electronics system and to the control sensor by an electronics system interface connector and a control sensor interface connector respectively to feed said control signal from said control device to the electronics system and to the control sensor when the condensate line in the system operating condition exceeds a predetermined level, and the electronics system and the control sensor are coupled by said electronics system interface connector and said electronics system interface connector to feed said sensor control signal from the control sensor to the electronics system when the control sensor receives said control signal from said control device to operatively integrate said control system into an existing air conditioning system to feed said condensate level signal from said condensate sensor to said control device to feed said control signal from said control device to said control sensor and the electronic system and to feed said sensor control signal to the electronic system without compromising the integrity of the control link between the compressor and the electronics system. ### Claim 4 (depends on 3) The control system of claim 3 wherein said control sensor comprises a thermistor.