# US 2018/0023850 A1 · Packaged terminal air conditioner unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0023850 A1 - Document ID: US20180023850A1 - Status: Published application - Kind: A1 - Application number: 15/214,503 - Filed: 2016-07-20 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: Haier US Appliance Solutions, Inc. - Applicants: Haier US Appliance Solutions, Inc. - Inventors: Gunaranjan Chaudhry; Brent Alden Junge - Web page: https://patentgrep.com/patent/US20180023850A1 ## CPC - F25B 13/00: Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) - F24F 1/027: mounted in wall openings, e.g. in windows - F24F 13/20: Casings or covers - F24F 13/30: Arrangement or mounting of heat-exchangers - F25B 5/04: arranged in series - F25B 41/00: Fluid-circulation arrangements - F25B 2341/0012: Ejectors with the cooled primary flow at high pressure - F25B 2400/0407: for ejectors - F25B 2400/23: Separators - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - 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 packaged terminal air conditioner unit is provided. The packaged terminal air conditioner unit includes a casing. A compressor, an interior coil, an exterior coil and a reversing valve are positioned within the casing. The reversing valve is configured for selectively reversing a flow direction of compressed refrigerant from the compressor. The packaged terminal air conditioner also includes at least one ejector for combining a stream of refrigerant from a primary loop with a stream of refrigerant from an auxiliary cooling loop, thereby improving system efficiency. ## Claims ### Claim 1 A packaged terminal air conditioner unit, comprising: a casing extending between an exterior side portion and an interior side portion; a compressor positioned within the casing, the compressor operable to compress a refrigerant; an exterior coil positioned within the casing at the exterior side portion of the casing; a primary interior coil positioned within the casing at the interior side portion of the casing; a secondary interior coil positioned within the casing at the interior side portion of the casing; a reversing valve positioned within the casing, the reversing valve being in fluid communication with the compressor in order to receive compressed refrigerant from the compressor and selectively direct the compressed refrigerant from the compressor; an ejector configured for combining two or more streams of refrigerant; a primary loop having a first portion extending between the reversing valve and the exterior coil, a second portion extending between the exterior coil and the ejector, a third portion extending between the ejector and the primary interior coil, and a fourth portion extending between the primary interior coil and the reversing valve; and an auxiliary loop conduit having a first portion extending between the third portion of the primary loop and the secondary interior coil, a second portion extending between the secondary interior coil and the second portion of the primary loop, and a third portion extending between the secondary interior coil and the ejector. ### Claim 2 (depends on 1) The packaged terminal air conditioner unit of claim 1, further comprising: a first check valve coupled to the second portion of the primary loop to prevent refrigerant from flowing back into the exterior coil; and a second check valve coupled to the third portion of the primary loop to prevent refrigerant from flowing back into the ejector. ### Claim 3 (depends on 1) The packaged terminal air conditioner unit of claim 1, further comprising a check valve coupled to the second portion of the auxiliary loop conduit to prevent refrigerant from flowing from the exterior coil into the secondary interior coil. ### Claim 4 (depends on 3) The packaged terminal air conditioner unit of claim 3, further comprising a first expansion device coupled to the first portion of the auxiliary loop conduit and a second expansion device coupled to the second portion of the auxiliary loop conduit. ### Claim 5 (depends on 4) The packaged terminal air conditioner unit of claim 4, wherein the first expansion device and the second expansion device are capillary tubes. ### Claim 6 (depends on 1) The packaged terminal air conditioner unit of claim 1, further comprising a phase separator positioned within the casing and coupled to the third portion of the primary loop, the phase separator being configured for separating refrigerant into a liquid refrigerant stream and a vapor refrigerant stream. ### Claim 7 (depends on 6) The packaged terminal air conditioner unit of claim 6, further comprising a vapor bypass conduit extending between the phase separator and the fourth portion of the primary loop, wherein the vapor refrigerant stream flows directly from the phase separator to the compressor through the vapor bypass conduit. ### Claim 8 (depends on 7) The packaged terminal air conditioner unit of claim 7, further comprising a check valve coupled to the vapor bypass conduit to prevent the flow of refrigerant from the compressor to the phase separator. ### Claim 9 (depends on 8) The packaged terminal air conditioner unit of claim 8, wherein the phase separator is configured to provide the liquid refrigerant stream to both the primary interior coil and the secondary interior coil. ### Claim 10 (depends on 1) The packaged terminal air conditioner unit of claim 1, wherein the packaged terminal air conditioner unit is configured such that, in a cooling mode, the reversing valve directs refrigerant directly from the compressor to the exterior coil, and wherein the packaged terminal air conditioner unit is configured such that, in a heating mode, the reversing valve directs refrigerant directly from the compressor to the primary interior coil. ### Claim 11 (depends on 10) The packaged terminal air conditioner unit of claim 10, wherein in the cooling mode, a flow of liquid refrigerant from the exterior coil flows through the ejector, such that the ejector draws in a flow of vapor refrigerant from the secondary interior coil through the third portion of the auxiliary loop conduit into the flow of liquid refrigerant, and a combined flow of liquid and vapor refrigerant flows out of the ejector toward the primary interior coil along the third portion of the primary loop. ### Claim 12 A packaged terminal air conditioner unit, comprising: a casing extending between an exterior side portion and an interior side portion; a compressor positioned within the casing, the compressor operable to compress a refrigerant; an exterior coil positioned within the casing at the exterior side portion of the casing; a primary interior coil positioned within the casing at the interior side portion of the casing; a secondary interior coil positioned within the casing at the interior side portion of the casing; a reversing valve positioned within the casing, the reversing valve being in fluid communication with the compressor in order to receive compressed refrigerant from the compressor and selectively direct the compressed refrigerant from the compressor; an ejector configured for combining two or more streams of refrigerant; a primary loop having a first portion extending between the reversing valve and the exterior coil, a second portion extending between the exterior coil and the ejector, a third portion extending between the ejector and the primary interior coil, and a fourth portion extending between the primary interior coil and the reversing valve; and an auxiliary loop conduit having a first portion extending between the third portion of the primary loop and the secondary interior coil, and a second portion extending between the secondary interior coil and the ejector, wherein the second portion of the primary loop comprises a check valve configured to prevent the flow of refrigerant back in to the exterior coil and an expansion device plumbed in parallel. ### Claim 13 (depends on 12) The packaged terminal air conditioner unit of claim 12, further comprising a check valve coupled to the third portion of the primary loop to prevent refrigerant from flowing back into the ejector. ### Claim 14 (depends on 12) The packaged terminal air conditioner unit of claim 12, further comprising a first expansion device coupled to the first portion of the auxiliary loop conduit. ### Claim 15 (depends on 12) The packaged terminal air conditioner unit of claim 12, further comprising: a phase separator positioned within the casing and coupled to the third portion of the primary loop, the phase separator being configured for separating refrigerant into a liquid refrigerant stream and a vapor refrigerant stream; and a vapor bypass conduit extending between the phase separator and the fourth portion of the primary loop, wherein the vapor refrigerant stream flows directly from the phase separator to the compressor through the vapor bypass conduit. ### Claim 16 A packaged terminal air conditioner unit, comprising: a casing extending between an exterior side portion and an interior side portion; a compressor positioned within the casing, the compressor operable to compress a refrigerant; an exterior coil positioned within the casing at the exterior side portion of the casing; a primary interior coil positioned within the casing at the interior side portion of the casing; a secondary interior coil positioned within the casing at the interior side portion of the casing; a reversing valve positioned within the casing, the reversing valve being in fluid communication with the compressor in order to receive compressed refrigerant from the compressor and selectively direct the compressed refrigerant from the compressor; an ejector configured for combining two or more streams of refrigerant; a primary loop having a first portion extending between the reversing valve and the exterior coil, a second portion extending between the exterior coil and the ejector, a third portion extending between the ejector and the primary interior coil, and a fourth portion extending between the primary interior coil and the reversing valve; and an auxiliary loop conduit having a first portion extending between the third portion of the primary loop and a three-way valve, a second portion extending between the three way valve and the secondary interior coil, a third portion extending between the secondary interior coil and the ejector, and a fourth portion extending between the three-way valve and the second portion of the primary loop. ### Claim 17 (depends on 16) The packaged terminal air conditioner unit of claim 16, wherein the packaged terminal air conditioner unit is configured such that, in a cooling mode, the three-way valve is configured for directing refrigerant from the third portion of the primary loop through the secondary interior coil through the second portion of the auxiliary loop conduit, and wherein the packaged terminal air conditioner unit is configured such that, in a heating mode, the three-way valve is configured for directing refrigerant from the secondary interior coil to the fourth portion of the auxiliary loop conduit. ### Claim 18 (depends on 16) The packaged terminal air conditioner unit of claim 16, further comprising a phase separator positioned within the casing and coupled to the third portion of the primary loop, the phase separator being configured for separating refrigerant into a liquid refrigerant stream and a vapor refrigerant stream. ### Claim 19 (depends on 18) The packaged terminal air conditioner unit of claim 18, further comprising a vapor bypass conduit extending between the phase separator and the fourth portion of the primary loop, wherein the vapor refrigerant stream flows directly from the phase separator to the compressor through the vapor bypass conduit. ### Claim 20 (depends on 19) The packaged terminal air conditioner unit of claim 19, further comprising a check valve coupled to the vapor bypass conduit to prevent the flow of refrigerant from the compressor to the phase separator.