초록 ▼

A fluid level sensor. The sensor comprises a housing; a chamber enclosed by the housing; a liquid port in a lower area of the housing operable to connect the chamber to a lower, liquid containing area of a heat exchanger; and a gas port located in an upper area of the housing and operable to connect

A fluid level sensor. The sensor comprises a housing; a chamber enclosed by the housing; a liquid port in a lower area of the housing operable to connect the chamber to a lower, liquid containing area of a heat exchanger; and a gas port located in an upper area of the housing and operable to connect the chamber to an upper, vapor containing area of a heat exchanger. The sensor includes first and second apertures in the housing; and cooling conduit passing through the chamber and through the first and second apertures and operable to cool the chamber. There is at least one sensor located in the chamber and adapted to sense a temperature of fluid in the chamber.

대표청구항 ▼

[ What is claimed for letters patent of the united states is as follows:] [15.] An air conditioning system comprising:a compressor;a first heat exchanger;an expansion valve;a second heat exchanger;conduit sequentially linking the compressor, the first heat exchanger, the expansion valve, and the sec

[ What is claimed for letters patent of the united states is as follows:] [15.] An air conditioning system comprising:a compressor;a first heat exchanger;an expansion valve;a second heat exchanger;conduit sequentially linking the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger into a circuit;a liquid level sensor operably associated with the first heat exchanger, the sensor including a housing, a vapor port in the housing connected to a vaporous region of the first heat exchanger, a liquid port in the housing connected to a liquid region of the first heat exchanger, a chamber within the housing and open to the liquid and vapor ports so as to receive liquid and vaporous refrigerant from the first heat exchanger and establish a liquid level in the chamber representative of the refrigerant level in the first heat exchanger, cooling conduit for cooling the interior of the chamber, and at least one sensor located proximal a desired liquid level in the chamber and measuring a condition in the chamber; anda controller operably connected to the sensor and receiving a signal from the sensor representative of the measured condition, the controller being operable to control the expansion valve as a function of the condition signal.